1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/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/instanceKlass.hpp"
40 #include "oops/klass.inline.hpp"
41 #include "oops/klassOop.hpp"
42 #include "oops/klassVtable.hpp"
43 #include "oops/methodOop.hpp"
44 #include "oops/symbol.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "runtime/javaCalls.hpp"
47 #include "runtime/perfData.hpp"
48 #include "runtime/reflection.hpp"
49 #include "runtime/signature.hpp"
50 #include "runtime/timer.hpp"
51 #include "services/classLoadingService.hpp"
52 #include "services/threadService.hpp"
53
54 // We generally try to create the oops directly when parsing, rather than
55 // allocating temporary data structures and copying the bytes twice. A
56 // temporary area is only needed when parsing utf8 entries in the constant
57 // pool and when parsing line number tables.
58
59 // We add assert in debug mode when class format is not checked.
60
61 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
62 #define JAVA_MIN_SUPPORTED_VERSION 45
63 #define JAVA_MAX_SUPPORTED_VERSION 51
64 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
65
66 // Used for two backward compatibility reasons:
67 // - to check for new additions to the class file format in JDK1.5
68 // - to check for bug fixes in the format checker in JDK1.5
69 #define JAVA_1_5_VERSION 49
70
71 // Used for backward compatibility reasons:
72 // - to check for javac bug fixes that happened after 1.5
73 // - also used as the max version when running in jdk6
74 #define JAVA_6_VERSION 50
75
76 // Used for backward compatibility reasons:
77 // - to check NameAndType_info signatures more aggressively
78 #define JAVA_7_VERSION 51
79
80
81 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
82 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
83 // this function (_current can be allocated in a register, with scalar
84 // replacement of aggregates). The _current pointer is copied back to
85 // stream() when this function returns. DON'T call another method within
86 // this method that uses stream().
87 ClassFileStream* cfs0 = stream();
88 ClassFileStream cfs1 = *cfs0;
89 ClassFileStream* cfs = &cfs1;
90 #ifdef ASSERT
91 assert(cfs->allocated_on_stack(),"should be local");
92 u1* old_current = cfs0->current();
93 #endif
94
95 // Used for batching symbol allocations.
96 const char* names[SymbolTable::symbol_alloc_batch_size];
97 int lengths[SymbolTable::symbol_alloc_batch_size];
98 int indices[SymbolTable::symbol_alloc_batch_size];
99 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
100 int names_count = 0;
101
102 // parsing Index 0 is unused
103 for (int index = 1; index < length; index++) {
104 // Each of the following case guarantees one more byte in the stream
105 // for the following tag or the access_flags following constant pool,
106 // so we don't need bounds-check for reading tag.
107 u1 tag = cfs->get_u1_fast();
108 switch (tag) {
109 case JVM_CONSTANT_Class :
110 {
111 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
112 u2 name_index = cfs->get_u2_fast();
113 cp->klass_index_at_put(index, name_index);
114 }
115 break;
116 case JVM_CONSTANT_Fieldref :
117 {
118 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
119 u2 class_index = cfs->get_u2_fast();
120 u2 name_and_type_index = cfs->get_u2_fast();
121 cp->field_at_put(index, class_index, name_and_type_index);
122 }
123 break;
124 case JVM_CONSTANT_Methodref :
125 {
126 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
127 u2 class_index = cfs->get_u2_fast();
128 u2 name_and_type_index = cfs->get_u2_fast();
129 cp->method_at_put(index, class_index, name_and_type_index);
130 }
131 break;
132 case JVM_CONSTANT_InterfaceMethodref :
133 {
134 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
135 u2 class_index = cfs->get_u2_fast();
136 u2 name_and_type_index = cfs->get_u2_fast();
137 cp->interface_method_at_put(index, class_index, name_and_type_index);
138 }
139 break;
140 case JVM_CONSTANT_String :
141 {
142 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
143 u2 string_index = cfs->get_u2_fast();
144 cp->string_index_at_put(index, string_index);
145 }
146 break;
147 case JVM_CONSTANT_MethodHandle :
148 case JVM_CONSTANT_MethodType :
149 if (!EnableMethodHandles ||
150 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
151 classfile_parse_error(
152 (!EnableMethodHandles ?
153 "This JVM does not support constant tag %u in class file %s" :
154 "Class file version does not support constant tag %u in class file %s"),
155 tag, CHECK);
156 }
157 if (tag == JVM_CONSTANT_MethodHandle) {
158 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
159 u1 ref_kind = cfs->get_u1_fast();
160 u2 method_index = cfs->get_u2_fast();
161 cp->method_handle_index_at_put(index, ref_kind, method_index);
162 } else if (tag == JVM_CONSTANT_MethodType) {
163 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
164 u2 signature_index = cfs->get_u2_fast();
165 cp->method_type_index_at_put(index, signature_index);
166 } else {
167 ShouldNotReachHere();
168 }
169 break;
170 case JVM_CONSTANT_InvokeDynamicTrans : // this tag appears only in old classfiles
171 case JVM_CONSTANT_InvokeDynamic :
172 {
173 if (!EnableInvokeDynamic ||
174 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
175 classfile_parse_error(
176 (!EnableInvokeDynamic ?
177 "This JVM does not support constant tag %u in class file %s" :
178 "Class file version does not support constant tag %u in class file %s"),
179 tag, CHECK);
180 }
181 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
182 u2 bootstrap_specifier_index = cfs->get_u2_fast();
183 u2 name_and_type_index = cfs->get_u2_fast();
184 if (tag == JVM_CONSTANT_InvokeDynamicTrans) {
185 if (!AllowTransitionalJSR292)
186 classfile_parse_error(
187 "This JVM does not support transitional InvokeDynamic tag %u in class file %s",
188 tag, CHECK);
189 cp->invoke_dynamic_trans_at_put(index, bootstrap_specifier_index, name_and_type_index);
190 break;
191 }
192 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
193 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
194 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
195 }
196 break;
197 case JVM_CONSTANT_Integer :
198 {
199 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
200 u4 bytes = cfs->get_u4_fast();
201 cp->int_at_put(index, (jint) bytes);
202 }
203 break;
204 case JVM_CONSTANT_Float :
205 {
206 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
207 u4 bytes = cfs->get_u4_fast();
208 cp->float_at_put(index, *(jfloat*)&bytes);
209 }
210 break;
211 case JVM_CONSTANT_Long :
212 // A mangled type might cause you to overrun allocated memory
213 guarantee_property(index+1 < length,
214 "Invalid constant pool entry %u in class file %s",
215 index, CHECK);
216 {
217 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
218 u8 bytes = cfs->get_u8_fast();
219 cp->long_at_put(index, bytes);
220 }
221 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
222 break;
223 case JVM_CONSTANT_Double :
224 // A mangled type might cause you to overrun allocated memory
225 guarantee_property(index+1 < length,
226 "Invalid constant pool entry %u in class file %s",
227 index, CHECK);
228 {
229 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
230 u8 bytes = cfs->get_u8_fast();
231 cp->double_at_put(index, *(jdouble*)&bytes);
232 }
233 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
234 break;
235 case JVM_CONSTANT_NameAndType :
236 {
237 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
238 u2 name_index = cfs->get_u2_fast();
239 u2 signature_index = cfs->get_u2_fast();
240 cp->name_and_type_at_put(index, name_index, signature_index);
241 }
242 break;
243 case JVM_CONSTANT_Utf8 :
244 {
245 cfs->guarantee_more(2, CHECK); // utf8_length
246 u2 utf8_length = cfs->get_u2_fast();
247 u1* utf8_buffer = cfs->get_u1_buffer();
248 assert(utf8_buffer != NULL, "null utf8 buffer");
249 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
250 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
251 cfs->skip_u1_fast(utf8_length);
252
253 // Before storing the symbol, make sure it's legal
254 if (_need_verify) {
255 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
256 }
257
258 if (AnonymousClasses && has_cp_patch_at(index)) {
259 Handle patch = clear_cp_patch_at(index);
260 guarantee_property(java_lang_String::is_instance(patch()),
261 "Illegal utf8 patch at %d in class file %s",
262 index, CHECK);
263 char* str = java_lang_String::as_utf8_string(patch());
264 // (could use java_lang_String::as_symbol instead, but might as well batch them)
265 utf8_buffer = (u1*) str;
266 utf8_length = (int) strlen(str);
267 }
268
269 unsigned int hash;
270 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
271 if (result == NULL) {
272 names[names_count] = (char*)utf8_buffer;
273 lengths[names_count] = utf8_length;
274 indices[names_count] = index;
275 hashValues[names_count++] = hash;
276 if (names_count == SymbolTable::symbol_alloc_batch_size) {
277 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
278 names_count = 0;
279 }
280 } else {
281 cp->symbol_at_put(index, result);
282 }
283 }
284 break;
285 default:
286 classfile_parse_error(
287 "Unknown constant tag %u in class file %s", tag, CHECK);
288 break;
289 }
290 }
291
292 // Allocate the remaining symbols
293 if (names_count > 0) {
294 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
295 }
296
297 // Copy _current pointer of local copy back to stream().
298 #ifdef ASSERT
299 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
300 #endif
301 cfs0->set_current(cfs1.current());
302 }
303
304 // This class unreferences constant pool symbols if an error has occurred
305 // while parsing the class before it is assigned into the class.
306 // If it gets an error after that it is unloaded and the constant pool will
307 // be cleaned up then.
308 class ConstantPoolCleaner : public StackObj {
309 constantPoolHandle _cphandle;
310 bool _in_error;
311 public:
312 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
313 ~ConstantPoolCleaner() {
314 if (_in_error && _cphandle.not_null()) {
315 _cphandle->unreference_symbols();
316 }
317 }
318 void set_in_error(bool clean) { _in_error = clean; }
319 };
320
321 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
322
323 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
324 ClassFileStream* cfs = stream();
325 constantPoolHandle nullHandle;
326
327 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
328 u2 length = cfs->get_u2_fast();
329 guarantee_property(
330 length >= 1, "Illegal constant pool size %u in class file %s",
331 length, CHECK_(nullHandle));
332 constantPoolOop constant_pool =
333 oopFactory::new_constantPool(length,
334 oopDesc::IsSafeConc,
335 CHECK_(nullHandle));
336 constantPoolHandle cp (THREAD, constant_pool);
337
338 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
339 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
340
341 // parsing constant pool entries
342 parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
343
344 int index = 1; // declared outside of loops for portability
345
346 // first verification pass - validate cross references and fixup class and string constants
347 for (index = 1; index < length; index++) { // Index 0 is unused
348 jbyte tag = cp->tag_at(index).value();
349 switch (tag) {
350 case JVM_CONSTANT_Class :
351 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
352 break;
353 case JVM_CONSTANT_Fieldref :
354 // fall through
355 case JVM_CONSTANT_Methodref :
356 // fall through
357 case JVM_CONSTANT_InterfaceMethodref : {
358 if (!_need_verify) break;
359 int klass_ref_index = cp->klass_ref_index_at(index);
360 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
361 check_property(valid_cp_range(klass_ref_index, length) &&
362 is_klass_reference(cp, klass_ref_index),
363 "Invalid constant pool index %u in class file %s",
364 klass_ref_index,
365 CHECK_(nullHandle));
366 check_property(valid_cp_range(name_and_type_ref_index, length) &&
367 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
368 "Invalid constant pool index %u in class file %s",
369 name_and_type_ref_index,
370 CHECK_(nullHandle));
371 break;
372 }
373 case JVM_CONSTANT_String :
374 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
375 break;
376 case JVM_CONSTANT_Integer :
377 break;
378 case JVM_CONSTANT_Float :
379 break;
380 case JVM_CONSTANT_Long :
381 case JVM_CONSTANT_Double :
382 index++;
383 check_property(
384 (index < length && cp->tag_at(index).is_invalid()),
385 "Improper constant pool long/double index %u in class file %s",
386 index, CHECK_(nullHandle));
387 break;
388 case JVM_CONSTANT_NameAndType : {
389 if (!_need_verify) break;
390 int name_ref_index = cp->name_ref_index_at(index);
391 int signature_ref_index = cp->signature_ref_index_at(index);
392 check_property(
393 valid_cp_range(name_ref_index, length) &&
394 cp->tag_at(name_ref_index).is_utf8(),
395 "Invalid constant pool index %u in class file %s",
396 name_ref_index, CHECK_(nullHandle));
397 check_property(
398 valid_cp_range(signature_ref_index, length) &&
399 cp->tag_at(signature_ref_index).is_utf8(),
400 "Invalid constant pool index %u in class file %s",
401 signature_ref_index, CHECK_(nullHandle));
402 break;
403 }
404 case JVM_CONSTANT_Utf8 :
405 break;
406 case JVM_CONSTANT_UnresolvedClass : // fall-through
407 case JVM_CONSTANT_UnresolvedClassInError:
408 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
409 break;
410 case JVM_CONSTANT_ClassIndex :
411 {
412 int class_index = cp->klass_index_at(index);
413 check_property(
414 valid_cp_range(class_index, length) &&
415 cp->tag_at(class_index).is_utf8(),
416 "Invalid constant pool index %u in class file %s",
417 class_index, CHECK_(nullHandle));
418 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
419 }
420 break;
421 case JVM_CONSTANT_UnresolvedString :
422 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
423 break;
424 case JVM_CONSTANT_StringIndex :
425 {
426 int string_index = cp->string_index_at(index);
427 check_property(
428 valid_cp_range(string_index, length) &&
429 cp->tag_at(string_index).is_utf8(),
430 "Invalid constant pool index %u in class file %s",
431 string_index, CHECK_(nullHandle));
432 Symbol* sym = cp->symbol_at(string_index);
433 cp->unresolved_string_at_put(index, sym);
434 }
435 break;
436 case JVM_CONSTANT_MethodHandle :
437 {
438 int ref_index = cp->method_handle_index_at(index);
439 check_property(
440 valid_cp_range(ref_index, length) &&
441 EnableMethodHandles,
442 "Invalid constant pool index %u in class file %s",
443 ref_index, CHECK_(nullHandle));
444 constantTag tag = cp->tag_at(ref_index);
445 int ref_kind = cp->method_handle_ref_kind_at(index);
446 switch (ref_kind) {
447 case JVM_REF_getField:
448 case JVM_REF_getStatic:
449 case JVM_REF_putField:
450 case JVM_REF_putStatic:
451 check_property(
452 tag.is_field(),
453 "Invalid constant pool index %u in class file %s (not a field)",
454 ref_index, CHECK_(nullHandle));
455 break;
456 case JVM_REF_invokeVirtual:
457 case JVM_REF_invokeStatic:
458 case JVM_REF_invokeSpecial:
459 case JVM_REF_newInvokeSpecial:
460 check_property(
461 tag.is_method(),
462 "Invalid constant pool index %u in class file %s (not a method)",
463 ref_index, CHECK_(nullHandle));
464 break;
465 case JVM_REF_invokeInterface:
466 check_property(
467 tag.is_interface_method(),
468 "Invalid constant pool index %u in class file %s (not an interface method)",
469 ref_index, CHECK_(nullHandle));
470 break;
471 default:
472 classfile_parse_error(
473 "Bad method handle kind at constant pool index %u in class file %s",
474 index, CHECK_(nullHandle));
475 }
476 // Keep the ref_index unchanged. It will be indirected at link-time.
477 }
478 break;
479 case JVM_CONSTANT_MethodType :
480 {
481 int ref_index = cp->method_type_index_at(index);
482 check_property(
483 valid_cp_range(ref_index, length) &&
484 cp->tag_at(ref_index).is_utf8() &&
485 EnableMethodHandles,
486 "Invalid constant pool index %u in class file %s",
487 ref_index, CHECK_(nullHandle));
488 }
489 break;
490 case JVM_CONSTANT_InvokeDynamicTrans :
491 case JVM_CONSTANT_InvokeDynamic :
492 {
493 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
494 check_property(valid_cp_range(name_and_type_ref_index, length) &&
495 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
496 "Invalid constant pool index %u in class file %s",
497 name_and_type_ref_index,
498 CHECK_(nullHandle));
499 if (tag == JVM_CONSTANT_InvokeDynamicTrans) {
500 int bootstrap_method_ref_index = cp->invoke_dynamic_bootstrap_method_ref_index_at(index);
501 check_property(valid_cp_range(bootstrap_method_ref_index, length) &&
502 cp->tag_at(bootstrap_method_ref_index).is_method_handle(),
503 "Invalid constant pool index %u in class file %s",
504 bootstrap_method_ref_index,
505 CHECK_(nullHandle));
506 }
507 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
508 break;
509 }
510 default:
511 fatal(err_msg("bad constant pool tag value %u",
512 cp->tag_at(index).value()));
513 ShouldNotReachHere();
514 break;
515 } // end of switch
516 } // end of for
517
518 if (_cp_patches != NULL) {
519 // need to treat this_class specially...
520 assert(AnonymousClasses, "");
521 int this_class_index;
522 {
523 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
524 u1* mark = cfs->current();
525 u2 flags = cfs->get_u2_fast();
526 this_class_index = cfs->get_u2_fast();
527 cfs->set_current(mark); // revert to mark
528 }
529
530 for (index = 1; index < length; index++) { // Index 0 is unused
531 if (has_cp_patch_at(index)) {
532 guarantee_property(index != this_class_index,
533 "Illegal constant pool patch to self at %d in class file %s",
534 index, CHECK_(nullHandle));
535 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
536 }
537 }
538 // Ensure that all the patches have been used.
539 for (index = 0; index < _cp_patches->length(); index++) {
540 guarantee_property(!has_cp_patch_at(index),
541 "Unused constant pool patch at %d in class file %s",
542 index, CHECK_(nullHandle));
543 }
544 }
545
546 if (!_need_verify) {
547 cp_in_error.set_in_error(false);
548 return cp;
549 }
550
551 // second verification pass - checks the strings are of the right format.
552 // but not yet to the other entries
553 for (index = 1; index < length; index++) {
554 jbyte tag = cp->tag_at(index).value();
555 switch (tag) {
556 case JVM_CONSTANT_UnresolvedClass: {
557 Symbol* class_name = cp->unresolved_klass_at(index);
558 // check the name, even if _cp_patches will overwrite it
559 verify_legal_class_name(class_name, CHECK_(nullHandle));
560 break;
561 }
562 case JVM_CONSTANT_NameAndType: {
563 if (_need_verify && _major_version >= JAVA_7_VERSION) {
564 int sig_index = cp->signature_ref_index_at(index);
565 int name_index = cp->name_ref_index_at(index);
566 Symbol* name = cp->symbol_at(name_index);
567 Symbol* sig = cp->symbol_at(sig_index);
568 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
569 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
570 } else {
571 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
572 }
573 }
574 break;
575 }
576 case JVM_CONSTANT_Fieldref:
577 case JVM_CONSTANT_Methodref:
578 case JVM_CONSTANT_InterfaceMethodref: {
579 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
580 // already verified to be utf8
581 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
582 // already verified to be utf8
583 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
584 Symbol* name = cp->symbol_at(name_ref_index);
585 Symbol* signature = cp->symbol_at(signature_ref_index);
586 if (tag == JVM_CONSTANT_Fieldref) {
587 verify_legal_field_name(name, CHECK_(nullHandle));
588 if (_need_verify && _major_version >= JAVA_7_VERSION) {
589 // Signature is verified above, when iterating NameAndType_info.
590 // Need only to be sure it's the right type.
591 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
592 throwIllegalSignature(
593 "Field", name, signature, CHECK_(nullHandle));
594 }
595 } else {
596 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
597 }
598 } else {
599 verify_legal_method_name(name, CHECK_(nullHandle));
600 if (_need_verify && _major_version >= JAVA_7_VERSION) {
601 // Signature is verified above, when iterating NameAndType_info.
602 // Need only to be sure it's the right type.
603 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
604 throwIllegalSignature(
605 "Method", name, signature, CHECK_(nullHandle));
606 }
607 } else {
608 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
609 }
610 if (tag == JVM_CONSTANT_Methodref) {
611 // 4509014: If a class method name begins with '<', it must be "<init>".
612 assert(name != NULL, "method name in constant pool is null");
613 unsigned int name_len = name->utf8_length();
614 assert(name_len > 0, "bad method name"); // already verified as legal name
615 if (name->byte_at(0) == '<') {
616 if (name != vmSymbols::object_initializer_name()) {
617 classfile_parse_error(
618 "Bad method name at constant pool index %u in class file %s",
619 name_ref_index, CHECK_(nullHandle));
620 }
621 }
622 }
623 }
624 break;
625 }
626 case JVM_CONSTANT_MethodHandle: {
627 int ref_index = cp->method_handle_index_at(index);
628 int ref_kind = cp->method_handle_ref_kind_at(index);
629 switch (ref_kind) {
630 case JVM_REF_invokeVirtual:
631 case JVM_REF_invokeStatic:
632 case JVM_REF_invokeSpecial:
633 case JVM_REF_newInvokeSpecial:
634 {
635 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
636 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
637 Symbol* name = cp->symbol_at(name_ref_index);
638 if (ref_kind == JVM_REF_newInvokeSpecial) {
639 if (name != vmSymbols::object_initializer_name()) {
640 classfile_parse_error(
641 "Bad constructor name at constant pool index %u in class file %s",
642 name_ref_index, CHECK_(nullHandle));
643 }
644 } else {
645 if (name == vmSymbols::object_initializer_name()) {
646 classfile_parse_error(
647 "Bad method name at constant pool index %u in class file %s",
648 name_ref_index, CHECK_(nullHandle));
649 }
650 }
651 }
652 break;
653 // Other ref_kinds are already fully checked in previous pass.
654 }
655 break;
656 }
657 case JVM_CONSTANT_MethodType: {
658 Symbol* no_name = vmSymbols::type_name(); // place holder
659 Symbol* signature = cp->method_type_signature_at(index);
660 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
661 break;
662 }
663 case JVM_CONSTANT_Utf8: {
664 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
665 }
666 } // end of switch
667 } // end of for
668
669 cp_in_error.set_in_error(false);
670 return cp;
671 }
672
673
674 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
675 assert(AnonymousClasses, "");
676 BasicType patch_type = T_VOID;
677 switch (cp->tag_at(index).value()) {
678
679 case JVM_CONSTANT_UnresolvedClass :
680 // Patching a class means pre-resolving it.
681 // The name in the constant pool is ignored.
682 if (java_lang_Class::is_instance(patch())) {
683 guarantee_property(!java_lang_Class::is_primitive(patch()),
684 "Illegal class patch at %d in class file %s",
685 index, CHECK);
686 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch()));
687 } else {
688 guarantee_property(java_lang_String::is_instance(patch()),
689 "Illegal class patch at %d in class file %s",
690 index, CHECK);
691 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
692 cp->unresolved_klass_at_put(index, name);
693 }
694 break;
695
696 case JVM_CONSTANT_UnresolvedString :
697 // Patching a string means pre-resolving it.
698 // The spelling in the constant pool is ignored.
699 // The constant reference may be any object whatever.
700 // If it is not a real interned string, the constant is referred
701 // to as a "pseudo-string", and must be presented to the CP
702 // explicitly, because it may require scavenging.
703 cp->pseudo_string_at_put(index, patch());
704 break;
705
706 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
707 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
708 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
709 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
710 patch_prim:
711 {
712 jvalue value;
713 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
714 guarantee_property(value_type == patch_type,
715 "Illegal primitive patch at %d in class file %s",
716 index, CHECK);
717 switch (value_type) {
718 case T_INT: cp->int_at_put(index, value.i); break;
719 case T_FLOAT: cp->float_at_put(index, value.f); break;
720 case T_LONG: cp->long_at_put(index, value.j); break;
721 case T_DOUBLE: cp->double_at_put(index, value.d); break;
722 default: assert(false, "");
723 }
724 }
725 break;
726
727 default:
728 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
729 guarantee_property(!has_cp_patch_at(index),
730 "Illegal unexpected patch at %d in class file %s",
731 index, CHECK);
732 return;
733 }
734
735 // On fall-through, mark the patch as used.
736 clear_cp_patch_at(index);
737 }
738
739
740
741 class NameSigHash: public ResourceObj {
742 public:
743 Symbol* _name; // name
744 Symbol* _sig; // signature
745 NameSigHash* _next; // Next entry in hash table
746 };
747
748
749 #define HASH_ROW_SIZE 256
750
751 unsigned int hash(Symbol* name, Symbol* sig) {
752 unsigned int raw_hash = 0;
753 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
754 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
755
756 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
757 }
758
759
760 void initialize_hashtable(NameSigHash** table) {
761 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
762 }
763
764 // Return false if the name/sig combination is found in table.
765 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
766 // The old format checker uses heap sort to find duplicates.
767 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
768 // of table since we don't expect Symbol*'s to move.
769 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
770 assert(name != NULL, "name in constant pool is NULL");
771
772 // First lookup for duplicates
773 int index = hash(name, sig);
774 NameSigHash* entry = table[index];
775 while (entry != NULL) {
776 if (entry->_name == name && entry->_sig == sig) {
777 return false;
778 }
779 entry = entry->_next;
780 }
781
782 // No duplicate is found, allocate a new entry and fill it.
783 entry = new NameSigHash();
784 entry->_name = name;
785 entry->_sig = sig;
786
787 // Insert into hash table
788 entry->_next = table[index];
789 table[index] = entry;
790
791 return true;
792 }
793
794
795 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
796 int length,
797 Handle class_loader,
798 Handle protection_domain,
799 Symbol* class_name,
800 TRAPS) {
801 ClassFileStream* cfs = stream();
802 assert(length > 0, "only called for length>0");
803 objArrayHandle nullHandle;
804 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
805 objArrayHandle interfaces (THREAD, interface_oop);
806
807 int index;
808 for (index = 0; index < length; index++) {
809 u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
810 KlassHandle interf;
811 check_property(
812 valid_cp_range(interface_index, cp->length()) &&
813 is_klass_reference(cp, interface_index),
814 "Interface name has bad constant pool index %u in class file %s",
815 interface_index, CHECK_(nullHandle));
816 if (cp->tag_at(interface_index).is_klass()) {
817 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
818 } else {
819 Symbol* unresolved_klass = cp->klass_name_at(interface_index);
820
821 // Don't need to check legal name because it's checked when parsing constant pool.
822 // But need to make sure it's not an array type.
823 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
824 "Bad interface name in class file %s", CHECK_(nullHandle));
825
826 // Call resolve_super so classcircularity is checked
827 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
828 unresolved_klass, class_loader, protection_domain,
829 false, CHECK_(nullHandle));
830 interf = KlassHandle(THREAD, k);
831
832 if (LinkWellKnownClasses) // my super type is well known to me
833 cp->klass_at_put(interface_index, interf()); // eagerly resolve
834 }
835
836 if (!Klass::cast(interf())->is_interface()) {
837 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
838 }
839 interfaces->obj_at_put(index, interf());
840 }
841
842 if (!_need_verify || length <= 1) {
843 return interfaces;
844 }
845
846 // Check if there's any duplicates in interfaces
847 ResourceMark rm(THREAD);
848 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
849 THREAD, NameSigHash*, HASH_ROW_SIZE);
850 initialize_hashtable(interface_names);
851 bool dup = false;
852 {
853 debug_only(No_Safepoint_Verifier nsv;)
854 for (index = 0; index < length; index++) {
855 klassOop k = (klassOop)interfaces->obj_at(index);
856 Symbol* name = instanceKlass::cast(k)->name();
857 // If no duplicates, add (name, NULL) in hashtable interface_names.
858 if (!put_after_lookup(name, NULL, interface_names)) {
859 dup = true;
860 break;
861 }
862 }
863 }
864 if (dup) {
865 classfile_parse_error("Duplicate interface name in class file %s",
866 CHECK_(nullHandle));
867 }
868
869 return interfaces;
870 }
871
872
873 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
874 // Make sure the constant pool entry is of a type appropriate to this field
875 guarantee_property(
876 (constantvalue_index > 0 &&
877 constantvalue_index < cp->length()),
878 "Bad initial value index %u in ConstantValue attribute in class file %s",
879 constantvalue_index, CHECK);
880 constantTag value_type = cp->tag_at(constantvalue_index);
881 switch ( cp->basic_type_for_signature_at(signature_index) ) {
882 case T_LONG:
883 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
884 break;
885 case T_FLOAT:
886 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
887 break;
888 case T_DOUBLE:
889 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
890 break;
891 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
892 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
893 break;
894 case T_OBJECT:
895 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
896 && (value_type.is_string() || value_type.is_unresolved_string())),
897 "Bad string initial value in class file %s", CHECK);
898 break;
899 default:
900 classfile_parse_error(
901 "Unable to set initial value %u in class file %s",
902 constantvalue_index, CHECK);
903 }
904 }
905
906
907 // Parse attributes for a field.
908 void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
909 u2 attributes_count,
910 bool is_static, u2 signature_index,
911 u2* constantvalue_index_addr,
912 bool* is_synthetic_addr,
913 u2* generic_signature_index_addr,
914 typeArrayHandle* field_annotations,
915 TRAPS) {
916 ClassFileStream* cfs = stream();
917 assert(attributes_count > 0, "length should be greater than 0");
918 u2 constantvalue_index = 0;
919 u2 generic_signature_index = 0;
920 bool is_synthetic = false;
921 u1* runtime_visible_annotations = NULL;
922 int runtime_visible_annotations_length = 0;
923 u1* runtime_invisible_annotations = NULL;
924 int runtime_invisible_annotations_length = 0;
925 while (attributes_count--) {
926 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
927 u2 attribute_name_index = cfs->get_u2_fast();
928 u4 attribute_length = cfs->get_u4_fast();
929 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
930 cp->tag_at(attribute_name_index).is_utf8(),
931 "Invalid field attribute index %u in class file %s",
932 attribute_name_index,
933 CHECK);
934 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
935 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
936 // ignore if non-static
937 if (constantvalue_index != 0) {
938 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
939 }
940 check_property(
941 attribute_length == 2,
942 "Invalid ConstantValue field attribute length %u in class file %s",
943 attribute_length, CHECK);
944 constantvalue_index = cfs->get_u2(CHECK);
945 if (_need_verify) {
946 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
947 }
948 } else if (attribute_name == vmSymbols::tag_synthetic()) {
949 if (attribute_length != 0) {
950 classfile_parse_error(
951 "Invalid Synthetic field attribute length %u in class file %s",
952 attribute_length, CHECK);
953 }
954 is_synthetic = true;
955 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
956 if (attribute_length != 0) {
957 classfile_parse_error(
958 "Invalid Deprecated field attribute length %u in class file %s",
959 attribute_length, CHECK);
960 }
961 } else if (_major_version >= JAVA_1_5_VERSION) {
962 if (attribute_name == vmSymbols::tag_signature()) {
963 if (attribute_length != 2) {
964 classfile_parse_error(
965 "Wrong size %u for field's Signature attribute in class file %s",
966 attribute_length, CHECK);
967 }
968 generic_signature_index = cfs->get_u2(CHECK);
969 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
970 runtime_visible_annotations_length = attribute_length;
971 runtime_visible_annotations = cfs->get_u1_buffer();
972 assert(runtime_visible_annotations != NULL, "null visible annotations");
973 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
974 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
975 runtime_invisible_annotations_length = attribute_length;
976 runtime_invisible_annotations = cfs->get_u1_buffer();
977 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
978 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
979 } else {
980 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
981 }
982 } else {
983 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
984 }
985 }
986
987 *constantvalue_index_addr = constantvalue_index;
988 *is_synthetic_addr = is_synthetic;
989 *generic_signature_index_addr = generic_signature_index;
990 *field_annotations = assemble_annotations(runtime_visible_annotations,
991 runtime_visible_annotations_length,
992 runtime_invisible_annotations,
993 runtime_invisible_annotations_length,
994 CHECK);
995 return;
996 }
997
998
999 // Field allocation types. Used for computing field offsets.
1000
1001 enum FieldAllocationType {
1002 STATIC_OOP, // Oops
1003 STATIC_BYTE, // Boolean, Byte, char
1004 STATIC_SHORT, // shorts
1005 STATIC_WORD, // ints
1006 STATIC_DOUBLE, // long or double
1007 STATIC_ALIGNED_DOUBLE,// aligned long or double
1008 NONSTATIC_OOP,
1009 NONSTATIC_BYTE,
1010 NONSTATIC_SHORT,
1011 NONSTATIC_WORD,
1012 NONSTATIC_DOUBLE,
1013 NONSTATIC_ALIGNED_DOUBLE
1014 };
1015
1016
1017 struct FieldAllocationCount {
1018 unsigned int static_oop_count;
1019 unsigned int static_byte_count;
1020 unsigned int static_short_count;
1021 unsigned int static_word_count;
1022 unsigned int static_double_count;
1023 unsigned int nonstatic_oop_count;
1024 unsigned int nonstatic_byte_count;
1025 unsigned int nonstatic_short_count;
1026 unsigned int nonstatic_word_count;
1027 unsigned int nonstatic_double_count;
1028 };
1029
1030 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface,
1031 struct FieldAllocationCount *fac,
1032 objArrayHandle* fields_annotations, TRAPS) {
1033 ClassFileStream* cfs = stream();
1034 typeArrayHandle nullHandle;
1035 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1036 u2 length = cfs->get_u2_fast();
1037 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
1038 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle));
1039 typeArrayHandle fields(THREAD, new_fields);
1040
1041 int index = 0;
1042 typeArrayHandle field_annotations;
1043 for (int n = 0; n < length; n++) {
1044 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1045
1046 AccessFlags access_flags;
1047 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1048 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1049 access_flags.set_flags(flags);
1050
1051 u2 name_index = cfs->get_u2_fast();
1052 int cp_size = cp->length();
1053 check_property(
1054 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1055 "Invalid constant pool index %u for field name in class file %s",
1056 name_index, CHECK_(nullHandle));
1057 Symbol* name = cp->symbol_at(name_index);
1058 verify_legal_field_name(name, CHECK_(nullHandle));
1059
1060 u2 signature_index = cfs->get_u2_fast();
1061 check_property(
1062 valid_cp_range(signature_index, cp_size) &&
1063 cp->tag_at(signature_index).is_utf8(),
1064 "Invalid constant pool index %u for field signature in class file %s",
1065 signature_index, CHECK_(nullHandle));
1066 Symbol* sig = cp->symbol_at(signature_index);
1067 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1068
1069 u2 constantvalue_index = 0;
1070 bool is_synthetic = false;
1071 u2 generic_signature_index = 0;
1072 bool is_static = access_flags.is_static();
1073
1074 u2 attributes_count = cfs->get_u2_fast();
1075 if (attributes_count > 0) {
1076 parse_field_attributes(cp, attributes_count, is_static, signature_index,
1077 &constantvalue_index, &is_synthetic,
1078 &generic_signature_index, &field_annotations,
1079 CHECK_(nullHandle));
1080 if (field_annotations.not_null()) {
1081 if (fields_annotations->is_null()) {
1082 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1083 *fields_annotations = objArrayHandle(THREAD, md);
1084 }
1085 (*fields_annotations)->obj_at_put(n, field_annotations());
1086 }
1087 if (is_synthetic) {
1088 access_flags.set_is_synthetic();
1089 }
1090 }
1091
1092 fields->short_at_put(index++, access_flags.as_short());
1093 fields->short_at_put(index++, name_index);
1094 fields->short_at_put(index++, signature_index);
1095 fields->short_at_put(index++, constantvalue_index);
1096
1097 // Remember how many oops we encountered and compute allocation type
1098 BasicType type = cp->basic_type_for_signature_at(signature_index);
1099 FieldAllocationType atype;
1100 if ( is_static ) {
1101 switch ( type ) {
1102 case T_BOOLEAN:
1103 case T_BYTE:
1104 fac->static_byte_count++;
1105 atype = STATIC_BYTE;
1106 break;
1107 case T_LONG:
1108 case T_DOUBLE:
1109 if (Universe::field_type_should_be_aligned(type)) {
1110 atype = STATIC_ALIGNED_DOUBLE;
1111 } else {
1112 atype = STATIC_DOUBLE;
1113 }
1114 fac->static_double_count++;
1115 break;
1116 case T_CHAR:
1117 case T_SHORT:
1118 fac->static_short_count++;
1119 atype = STATIC_SHORT;
1120 break;
1121 case T_FLOAT:
1122 case T_INT:
1123 fac->static_word_count++;
1124 atype = STATIC_WORD;
1125 break;
1126 case T_ARRAY:
1127 case T_OBJECT:
1128 fac->static_oop_count++;
1129 atype = STATIC_OOP;
1130 break;
1131 case T_ADDRESS:
1132 case T_VOID:
1133 default:
1134 assert(0, "bad field type");
1135 }
1136 } else {
1137 switch ( type ) {
1138 case T_BOOLEAN:
1139 case T_BYTE:
1140 fac->nonstatic_byte_count++;
1141 atype = NONSTATIC_BYTE;
1142 break;
1143 case T_LONG:
1144 case T_DOUBLE:
1145 if (Universe::field_type_should_be_aligned(type)) {
1146 atype = NONSTATIC_ALIGNED_DOUBLE;
1147 } else {
1148 atype = NONSTATIC_DOUBLE;
1149 }
1150 fac->nonstatic_double_count++;
1151 break;
1152 case T_CHAR:
1153 case T_SHORT:
1154 fac->nonstatic_short_count++;
1155 atype = NONSTATIC_SHORT;
1156 break;
1157 case T_FLOAT:
1158 case T_INT:
1159 fac->nonstatic_word_count++;
1160 atype = NONSTATIC_WORD;
1161 break;
1162 case T_ARRAY:
1163 case T_OBJECT:
1164 fac->nonstatic_oop_count++;
1165 atype = NONSTATIC_OOP;
1166 break;
1167 case T_ADDRESS:
1168 case T_VOID:
1169 default:
1170 assert(0, "bad field type");
1171 }
1172 }
1173
1174 // The correct offset is computed later (all oop fields will be located together)
1175 // We temporarily store the allocation type in the offset field
1176 fields->short_at_put(index++, atype);
1177 fields->short_at_put(index++, 0); // Clear out high word of byte offset
1178 fields->short_at_put(index++, generic_signature_index);
1179 }
1180
1181 if (_need_verify && length > 1) {
1182 // Check duplicated fields
1183 ResourceMark rm(THREAD);
1184 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1185 THREAD, NameSigHash*, HASH_ROW_SIZE);
1186 initialize_hashtable(names_and_sigs);
1187 bool dup = false;
1188 {
1189 debug_only(No_Safepoint_Verifier nsv;)
1190 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) {
1191 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
1192 Symbol* name = cp->symbol_at(name_index);
1193 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
1194 Symbol* sig = cp->symbol_at(sig_index);
1195 // If no duplicates, add name/signature in hashtable names_and_sigs.
1196 if (!put_after_lookup(name, sig, names_and_sigs)) {
1197 dup = true;
1198 break;
1199 }
1200 }
1201 }
1202 if (dup) {
1203 classfile_parse_error("Duplicate field name&signature in class file %s",
1204 CHECK_(nullHandle));
1205 }
1206 }
1207
1208 return fields;
1209 }
1210
1211
1212 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1213 while (length-- > 0) {
1214 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1215 }
1216 }
1217
1218
1219 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
1220 u4 exception_table_length,
1221 constantPoolHandle cp,
1222 TRAPS) {
1223 ClassFileStream* cfs = stream();
1224 typeArrayHandle nullHandle;
1225
1226 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
1227 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
1228 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
1229
1230 int index = 0;
1231 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
1232 for (unsigned int i = 0; i < exception_table_length; i++) {
1233 u2 start_pc = cfs->get_u2_fast();
1234 u2 end_pc = cfs->get_u2_fast();
1235 u2 handler_pc = cfs->get_u2_fast();
1236 u2 catch_type_index = cfs->get_u2_fast();
1237 // Will check legal target after parsing code array in verifier.
1238 if (_need_verify) {
1239 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1240 "Illegal exception table range in class file %s", CHECK_(nullHandle));
1241 guarantee_property(handler_pc < code_length,
1242 "Illegal exception table handler in class file %s", CHECK_(nullHandle));
1243 if (catch_type_index != 0) {
1244 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1245 is_klass_reference(cp, catch_type_index),
1246 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
1247 }
1248 }
1249 exception_handlers->int_at_put(index++, start_pc);
1250 exception_handlers->int_at_put(index++, end_pc);
1251 exception_handlers->int_at_put(index++, handler_pc);
1252 exception_handlers->int_at_put(index++, catch_type_index);
1253 }
1254 return exception_handlers;
1255 }
1256
1257 void ClassFileParser::parse_linenumber_table(
1258 u4 code_attribute_length, u4 code_length,
1259 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1260 ClassFileStream* cfs = stream();
1261 unsigned int num_entries = cfs->get_u2(CHECK);
1262
1263 // Each entry is a u2 start_pc, and a u2 line_number
1264 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1265
1266 // Verify line number attribute and table length
1267 check_property(
1268 code_attribute_length == sizeof(u2) + length_in_bytes,
1269 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1270
1271 cfs->guarantee_more(length_in_bytes, CHECK);
1272
1273 if ((*write_stream) == NULL) {
1274 if (length_in_bytes > fixed_buffer_size) {
1275 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1276 } else {
1277 (*write_stream) = new CompressedLineNumberWriteStream(
1278 linenumbertable_buffer, fixed_buffer_size);
1279 }
1280 }
1281
1282 while (num_entries-- > 0) {
1283 u2 bci = cfs->get_u2_fast(); // start_pc
1284 u2 line = cfs->get_u2_fast(); // line_number
1285 guarantee_property(bci < code_length,
1286 "Invalid pc in LineNumberTable in class file %s", CHECK);
1287 (*write_stream)->write_pair(bci, line);
1288 }
1289 }
1290
1291
1292 // Class file LocalVariableTable elements.
1293 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1294 public:
1295 u2 start_bci;
1296 u2 length;
1297 u2 name_cp_index;
1298 u2 descriptor_cp_index;
1299 u2 slot;
1300 };
1301
1302
1303 class LVT_Hash: public CHeapObj {
1304 public:
1305 LocalVariableTableElement *_elem; // element
1306 LVT_Hash* _next; // Next entry in hash table
1307 };
1308
1309 unsigned int hash(LocalVariableTableElement *elem) {
1310 unsigned int raw_hash = elem->start_bci;
1311
1312 raw_hash = elem->length + raw_hash * 37;
1313 raw_hash = elem->name_cp_index + raw_hash * 37;
1314 raw_hash = elem->slot + raw_hash * 37;
1315
1316 return raw_hash % HASH_ROW_SIZE;
1317 }
1318
1319 void initialize_hashtable(LVT_Hash** table) {
1320 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1321 table[i] = NULL;
1322 }
1323 }
1324
1325 void clear_hashtable(LVT_Hash** table) {
1326 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1327 LVT_Hash* current = table[i];
1328 LVT_Hash* next;
1329 while (current != NULL) {
1330 next = current->_next;
1331 current->_next = NULL;
1332 delete(current);
1333 current = next;
1334 }
1335 table[i] = NULL;
1336 }
1337 }
1338
1339 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1340 LVT_Hash* entry = table[index];
1341
1342 /*
1343 * 3-tuple start_bci/length/slot has to be unique key,
1344 * so the following comparison seems to be redundant:
1345 * && elem->name_cp_index == entry->_elem->name_cp_index
1346 */
1347 while (entry != NULL) {
1348 if (elem->start_bci == entry->_elem->start_bci
1349 && elem->length == entry->_elem->length
1350 && elem->name_cp_index == entry->_elem->name_cp_index
1351 && elem->slot == entry->_elem->slot
1352 ) {
1353 return entry;
1354 }
1355 entry = entry->_next;
1356 }
1357 return NULL;
1358 }
1359
1360 // Return false if the local variable is found in table.
1361 // Return true if no duplicate is found.
1362 // And local variable is added as a new entry in table.
1363 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1364 // First lookup for duplicates
1365 int index = hash(elem);
1366 LVT_Hash* entry = LVT_lookup(elem, index, table);
1367
1368 if (entry != NULL) {
1369 return false;
1370 }
1371 // No duplicate is found, allocate a new entry and fill it.
1372 if ((entry = new LVT_Hash()) == NULL) {
1373 return false;
1374 }
1375 entry->_elem = elem;
1376
1377 // Insert into hash table
1378 entry->_next = table[index];
1379 table[index] = entry;
1380
1381 return true;
1382 }
1383
1384 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1385 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1386 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1387 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1388 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1389 lvt->signature_cp_index = 0;
1390 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1391 }
1392
1393 // Function is used to parse both attributes:
1394 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1395 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1396 u2 max_locals,
1397 u4 code_attribute_length,
1398 constantPoolHandle cp,
1399 u2* localvariable_table_length,
1400 bool isLVTT,
1401 TRAPS) {
1402 ClassFileStream* cfs = stream();
1403 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1404 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1405 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1406 // Verify local variable table attribute has right length
1407 if (_need_verify) {
1408 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1409 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1410 }
1411 u2* localvariable_table_start = cfs->get_u2_buffer();
1412 assert(localvariable_table_start != NULL, "null local variable table");
1413 if (!_need_verify) {
1414 cfs->skip_u2_fast(size);
1415 } else {
1416 cfs->guarantee_more(size * 2, CHECK_NULL);
1417 for(int i = 0; i < (*localvariable_table_length); i++) {
1418 u2 start_pc = cfs->get_u2_fast();
1419 u2 length = cfs->get_u2_fast();
1420 u2 name_index = cfs->get_u2_fast();
1421 u2 descriptor_index = cfs->get_u2_fast();
1422 u2 index = cfs->get_u2_fast();
1423 // Assign to a u4 to avoid overflow
1424 u4 end_pc = (u4)start_pc + (u4)length;
1425
1426 if (start_pc >= code_length) {
1427 classfile_parse_error(
1428 "Invalid start_pc %u in %s in class file %s",
1429 start_pc, tbl_name, CHECK_NULL);
1430 }
1431 if (end_pc > code_length) {
1432 classfile_parse_error(
1433 "Invalid length %u in %s in class file %s",
1434 length, tbl_name, CHECK_NULL);
1435 }
1436 int cp_size = cp->length();
1437 guarantee_property(
1438 valid_cp_range(name_index, cp_size) &&
1439 cp->tag_at(name_index).is_utf8(),
1440 "Name index %u in %s has bad constant type in class file %s",
1441 name_index, tbl_name, CHECK_NULL);
1442 guarantee_property(
1443 valid_cp_range(descriptor_index, cp_size) &&
1444 cp->tag_at(descriptor_index).is_utf8(),
1445 "Signature index %u in %s has bad constant type in class file %s",
1446 descriptor_index, tbl_name, CHECK_NULL);
1447
1448 Symbol* name = cp->symbol_at(name_index);
1449 Symbol* sig = cp->symbol_at(descriptor_index);
1450 verify_legal_field_name(name, CHECK_NULL);
1451 u2 extra_slot = 0;
1452 if (!isLVTT) {
1453 verify_legal_field_signature(name, sig, CHECK_NULL);
1454
1455 // 4894874: check special cases for double and long local variables
1456 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1457 sig == vmSymbols::type_signature(T_LONG)) {
1458 extra_slot = 1;
1459 }
1460 }
1461 guarantee_property((index + extra_slot) < max_locals,
1462 "Invalid index %u in %s in class file %s",
1463 index, tbl_name, CHECK_NULL);
1464 }
1465 }
1466 return localvariable_table_start;
1467 }
1468
1469
1470 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1471 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1472 ClassFileStream* cfs = stream();
1473 u2 index = 0; // index in the array with long/double occupying two slots
1474 u4 i1 = *u1_index;
1475 u4 i2 = *u2_index + 1;
1476 for(int i = 0; i < array_length; i++) {
1477 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1478 index++;
1479 if (tag == ITEM_Long || tag == ITEM_Double) {
1480 index++;
1481 } else if (tag == ITEM_Object) {
1482 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1483 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1484 is_klass_reference(cp, class_index),
1485 "Bad class index %u in StackMap in class file %s",
1486 class_index, CHECK);
1487 } else if (tag == ITEM_Uninitialized) {
1488 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1489 guarantee_property(
1490 offset < code_length,
1491 "Bad uninitialized type offset %u in StackMap in class file %s",
1492 offset, CHECK);
1493 } else {
1494 guarantee_property(
1495 tag <= (u1)ITEM_Uninitialized,
1496 "Unknown variable type %u in StackMap in class file %s",
1497 tag, CHECK);
1498 }
1499 }
1500 u2_array[*u2_index] = index;
1501 *u1_index = i1;
1502 *u2_index = i2;
1503 }
1504
1505 typeArrayOop ClassFileParser::parse_stackmap_table(
1506 u4 code_attribute_length, TRAPS) {
1507 if (code_attribute_length == 0)
1508 return NULL;
1509
1510 ClassFileStream* cfs = stream();
1511 u1* stackmap_table_start = cfs->get_u1_buffer();
1512 assert(stackmap_table_start != NULL, "null stackmap table");
1513
1514 // check code_attribute_length first
1515 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1516
1517 if (!_need_verify && !DumpSharedSpaces) {
1518 return NULL;
1519 }
1520
1521 typeArrayOop stackmap_data =
1522 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1523
1524 stackmap_data->set_length(code_attribute_length);
1525 memcpy((void*)stackmap_data->byte_at_addr(0),
1526 (void*)stackmap_table_start, code_attribute_length);
1527 return stackmap_data;
1528 }
1529
1530 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1531 u4 method_attribute_length,
1532 constantPoolHandle cp, TRAPS) {
1533 ClassFileStream* cfs = stream();
1534 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1535 *checked_exceptions_length = cfs->get_u2_fast();
1536 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1537 u2* checked_exceptions_start = cfs->get_u2_buffer();
1538 assert(checked_exceptions_start != NULL, "null checked exceptions");
1539 if (!_need_verify) {
1540 cfs->skip_u2_fast(size);
1541 } else {
1542 // Verify each value in the checked exception table
1543 u2 checked_exception;
1544 u2 len = *checked_exceptions_length;
1545 cfs->guarantee_more(2 * len, CHECK_NULL);
1546 for (int i = 0; i < len; i++) {
1547 checked_exception = cfs->get_u2_fast();
1548 check_property(
1549 valid_cp_range(checked_exception, cp->length()) &&
1550 is_klass_reference(cp, checked_exception),
1551 "Exception name has bad type at constant pool %u in class file %s",
1552 checked_exception, CHECK_NULL);
1553 }
1554 }
1555 // check exceptions attribute length
1556 if (_need_verify) {
1557 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1558 sizeof(u2) * size),
1559 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1560 }
1561 return checked_exceptions_start;
1562 }
1563
1564 void ClassFileParser::throwIllegalSignature(
1565 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1566 ResourceMark rm(THREAD);
1567 Exceptions::fthrow(THREAD_AND_LOCATION,
1568 vmSymbols::java_lang_ClassFormatError(),
1569 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1570 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1571 }
1572
1573 #define MAX_ARGS_SIZE 255
1574 #define MAX_CODE_SIZE 65535
1575 #define INITIAL_MAX_LVT_NUMBER 256
1576
1577 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1578 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1579 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1580 // entire method attribute is parsed.
1581 //
1582 // The promoted_flags parameter is used to pass relevant access_flags
1583 // from the method back up to the containing klass. These flag values
1584 // are added to klass's access_flags.
1585
1586 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1587 AccessFlags *promoted_flags,
1588 typeArrayHandle* method_annotations,
1589 typeArrayHandle* method_parameter_annotations,
1590 typeArrayHandle* method_default_annotations,
1591 TRAPS) {
1592 ClassFileStream* cfs = stream();
1593 methodHandle nullHandle;
1594 ResourceMark rm(THREAD);
1595 // Parse fixed parts
1596 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1597
1598 int flags = cfs->get_u2_fast();
1599 u2 name_index = cfs->get_u2_fast();
1600 int cp_size = cp->length();
1601 check_property(
1602 valid_cp_range(name_index, cp_size) &&
1603 cp->tag_at(name_index).is_utf8(),
1604 "Illegal constant pool index %u for method name in class file %s",
1605 name_index, CHECK_(nullHandle));
1606 Symbol* name = cp->symbol_at(name_index);
1607 verify_legal_method_name(name, CHECK_(nullHandle));
1608
1609 u2 signature_index = cfs->get_u2_fast();
1610 guarantee_property(
1611 valid_cp_range(signature_index, cp_size) &&
1612 cp->tag_at(signature_index).is_utf8(),
1613 "Illegal constant pool index %u for method signature in class file %s",
1614 signature_index, CHECK_(nullHandle));
1615 Symbol* signature = cp->symbol_at(signature_index);
1616
1617 AccessFlags access_flags;
1618 if (name == vmSymbols::class_initializer_name()) {
1619 // We ignore the access flags for a class initializer. (JVM Spec. p. 116)
1620 flags = JVM_ACC_STATIC;
1621 } else {
1622 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1623 }
1624
1625 int args_size = -1; // only used when _need_verify is true
1626 if (_need_verify) {
1627 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1628 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1629 if (args_size > MAX_ARGS_SIZE) {
1630 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1631 }
1632 }
1633
1634 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1635
1636 // Default values for code and exceptions attribute elements
1637 u2 max_stack = 0;
1638 u2 max_locals = 0;
1639 u4 code_length = 0;
1640 u1* code_start = 0;
1641 u2 exception_table_length = 0;
1642 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1643 u2 checked_exceptions_length = 0;
1644 u2* checked_exceptions_start = NULL;
1645 CompressedLineNumberWriteStream* linenumber_table = NULL;
1646 int linenumber_table_length = 0;
1647 int total_lvt_length = 0;
1648 u2 lvt_cnt = 0;
1649 u2 lvtt_cnt = 0;
1650 bool lvt_allocated = false;
1651 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1652 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1653 u2* localvariable_table_length;
1654 u2** localvariable_table_start;
1655 u2* localvariable_type_table_length;
1656 u2** localvariable_type_table_start;
1657 bool parsed_code_attribute = false;
1658 bool parsed_checked_exceptions_attribute = false;
1659 bool parsed_stackmap_attribute = false;
1660 // stackmap attribute - JDK1.5
1661 typeArrayHandle stackmap_data;
1662 u2 generic_signature_index = 0;
1663 u1* runtime_visible_annotations = NULL;
1664 int runtime_visible_annotations_length = 0;
1665 u1* runtime_invisible_annotations = NULL;
1666 int runtime_invisible_annotations_length = 0;
1667 u1* runtime_visible_parameter_annotations = NULL;
1668 int runtime_visible_parameter_annotations_length = 0;
1669 u1* runtime_invisible_parameter_annotations = NULL;
1670 int runtime_invisible_parameter_annotations_length = 0;
1671 u1* annotation_default = NULL;
1672 int annotation_default_length = 0;
1673
1674 // Parse code and exceptions attribute
1675 u2 method_attributes_count = cfs->get_u2_fast();
1676 while (method_attributes_count--) {
1677 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1678 u2 method_attribute_name_index = cfs->get_u2_fast();
1679 u4 method_attribute_length = cfs->get_u4_fast();
1680 check_property(
1681 valid_cp_range(method_attribute_name_index, cp_size) &&
1682 cp->tag_at(method_attribute_name_index).is_utf8(),
1683 "Invalid method attribute name index %u in class file %s",
1684 method_attribute_name_index, CHECK_(nullHandle));
1685
1686 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1687 if (method_attribute_name == vmSymbols::tag_code()) {
1688 // Parse Code attribute
1689 if (_need_verify) {
1690 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1691 "Code attribute in native or abstract methods in class file %s",
1692 CHECK_(nullHandle));
1693 }
1694 if (parsed_code_attribute) {
1695 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1696 }
1697 parsed_code_attribute = true;
1698
1699 // Stack size, locals size, and code size
1700 if (_major_version == 45 && _minor_version <= 2) {
1701 cfs->guarantee_more(4, CHECK_(nullHandle));
1702 max_stack = cfs->get_u1_fast();
1703 max_locals = cfs->get_u1_fast();
1704 code_length = cfs->get_u2_fast();
1705 } else {
1706 cfs->guarantee_more(8, CHECK_(nullHandle));
1707 max_stack = cfs->get_u2_fast();
1708 max_locals = cfs->get_u2_fast();
1709 code_length = cfs->get_u4_fast();
1710 }
1711 if (_need_verify) {
1712 guarantee_property(args_size <= max_locals,
1713 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1714 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1715 "Invalid method Code length %u in class file %s",
1716 code_length, CHECK_(nullHandle));
1717 }
1718 // Code pointer
1719 code_start = cfs->get_u1_buffer();
1720 assert(code_start != NULL, "null code start");
1721 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1722 cfs->skip_u1_fast(code_length);
1723
1724 // Exception handler table
1725 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1726 exception_table_length = cfs->get_u2_fast();
1727 if (exception_table_length > 0) {
1728 exception_handlers =
1729 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1730 }
1731
1732 // Parse additional attributes in code attribute
1733 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1734 u2 code_attributes_count = cfs->get_u2_fast();
1735
1736 unsigned int calculated_attribute_length = 0;
1737
1738 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1739 calculated_attribute_length =
1740 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1741 } else {
1742 // max_stack, locals and length are smaller in pre-version 45.2 classes
1743 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1744 }
1745 calculated_attribute_length +=
1746 code_length +
1747 sizeof(exception_table_length) +
1748 sizeof(code_attributes_count) +
1749 exception_table_length *
1750 ( sizeof(u2) + // start_pc
1751 sizeof(u2) + // end_pc
1752 sizeof(u2) + // handler_pc
1753 sizeof(u2) ); // catch_type_index
1754
1755 while (code_attributes_count--) {
1756 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1757 u2 code_attribute_name_index = cfs->get_u2_fast();
1758 u4 code_attribute_length = cfs->get_u4_fast();
1759 calculated_attribute_length += code_attribute_length +
1760 sizeof(code_attribute_name_index) +
1761 sizeof(code_attribute_length);
1762 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1763 cp->tag_at(code_attribute_name_index).is_utf8(),
1764 "Invalid code attribute name index %u in class file %s",
1765 code_attribute_name_index,
1766 CHECK_(nullHandle));
1767 if (LoadLineNumberTables &&
1768 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1769 // Parse and compress line number table
1770 parse_linenumber_table(code_attribute_length, code_length,
1771 &linenumber_table, CHECK_(nullHandle));
1772
1773 } else if (LoadLocalVariableTables &&
1774 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1775 // Parse local variable table
1776 if (!lvt_allocated) {
1777 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1778 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1779 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1780 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1781 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1782 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1783 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1784 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1785 lvt_allocated = true;
1786 }
1787 if (lvt_cnt == max_lvt_cnt) {
1788 max_lvt_cnt <<= 1;
1789 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1790 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1791 }
1792 localvariable_table_start[lvt_cnt] =
1793 parse_localvariable_table(code_length,
1794 max_locals,
1795 code_attribute_length,
1796 cp,
1797 &localvariable_table_length[lvt_cnt],
1798 false, // is not LVTT
1799 CHECK_(nullHandle));
1800 total_lvt_length += localvariable_table_length[lvt_cnt];
1801 lvt_cnt++;
1802 } else if (LoadLocalVariableTypeTables &&
1803 _major_version >= JAVA_1_5_VERSION &&
1804 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1805 if (!lvt_allocated) {
1806 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1807 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1808 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1809 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1810 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1811 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1812 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1813 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1814 lvt_allocated = true;
1815 }
1816 // Parse local variable type table
1817 if (lvtt_cnt == max_lvtt_cnt) {
1818 max_lvtt_cnt <<= 1;
1819 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1820 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1821 }
1822 localvariable_type_table_start[lvtt_cnt] =
1823 parse_localvariable_table(code_length,
1824 max_locals,
1825 code_attribute_length,
1826 cp,
1827 &localvariable_type_table_length[lvtt_cnt],
1828 true, // is LVTT
1829 CHECK_(nullHandle));
1830 lvtt_cnt++;
1831 } else if (UseSplitVerifier &&
1832 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1833 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1834 // Stack map is only needed by the new verifier in JDK1.5.
1835 if (parsed_stackmap_attribute) {
1836 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1837 }
1838 typeArrayOop sm =
1839 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1840 stackmap_data = typeArrayHandle(THREAD, sm);
1841 parsed_stackmap_attribute = true;
1842 } else {
1843 // Skip unknown attributes
1844 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1845 }
1846 }
1847 // check method attribute length
1848 if (_need_verify) {
1849 guarantee_property(method_attribute_length == calculated_attribute_length,
1850 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1851 }
1852 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1853 // Parse Exceptions attribute
1854 if (parsed_checked_exceptions_attribute) {
1855 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1856 }
1857 parsed_checked_exceptions_attribute = true;
1858 checked_exceptions_start =
1859 parse_checked_exceptions(&checked_exceptions_length,
1860 method_attribute_length,
1861 cp, CHECK_(nullHandle));
1862 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1863 if (method_attribute_length != 0) {
1864 classfile_parse_error(
1865 "Invalid Synthetic method attribute length %u in class file %s",
1866 method_attribute_length, CHECK_(nullHandle));
1867 }
1868 // Should we check that there hasn't already been a synthetic attribute?
1869 access_flags.set_is_synthetic();
1870 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1871 if (method_attribute_length != 0) {
1872 classfile_parse_error(
1873 "Invalid Deprecated method attribute length %u in class file %s",
1874 method_attribute_length, CHECK_(nullHandle));
1875 }
1876 } else if (_major_version >= JAVA_1_5_VERSION) {
1877 if (method_attribute_name == vmSymbols::tag_signature()) {
1878 if (method_attribute_length != 2) {
1879 classfile_parse_error(
1880 "Invalid Signature attribute length %u in class file %s",
1881 method_attribute_length, CHECK_(nullHandle));
1882 }
1883 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
1884 generic_signature_index = cfs->get_u2_fast();
1885 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1886 runtime_visible_annotations_length = method_attribute_length;
1887 runtime_visible_annotations = cfs->get_u1_buffer();
1888 assert(runtime_visible_annotations != NULL, "null visible annotations");
1889 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1890 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1891 runtime_invisible_annotations_length = method_attribute_length;
1892 runtime_invisible_annotations = cfs->get_u1_buffer();
1893 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1894 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1895 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1896 runtime_visible_parameter_annotations_length = method_attribute_length;
1897 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1898 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1899 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1900 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1901 runtime_invisible_parameter_annotations_length = method_attribute_length;
1902 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1903 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1904 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1905 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1906 annotation_default_length = method_attribute_length;
1907 annotation_default = cfs->get_u1_buffer();
1908 assert(annotation_default != NULL, "null annotation default");
1909 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1910 } else {
1911 // Skip unknown attributes
1912 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1913 }
1914 } else {
1915 // Skip unknown attributes
1916 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1917 }
1918 }
1919
1920 if (linenumber_table != NULL) {
1921 linenumber_table->write_terminator();
1922 linenumber_table_length = linenumber_table->position();
1923 }
1924
1925 // Make sure there's at least one Code attribute in non-native/non-abstract method
1926 if (_need_verify) {
1927 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
1928 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
1929 }
1930
1931 // All sizing information for a methodOop is finally available, now create it
1932 methodOop m_oop = oopFactory::new_method(code_length, access_flags, linenumber_table_length,
1933 total_lvt_length, checked_exceptions_length,
1934 oopDesc::IsSafeConc, CHECK_(nullHandle));
1935 methodHandle m (THREAD, m_oop);
1936
1937 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
1938
1939 // Fill in information from fixed part (access_flags already set)
1940 m->set_constants(cp());
1941 m->set_name_index(name_index);
1942 m->set_signature_index(signature_index);
1943 m->set_generic_signature_index(generic_signature_index);
1944 #ifdef CC_INTERP
1945 // hmm is there a gc issue here??
1946 ResultTypeFinder rtf(cp->symbol_at(signature_index));
1947 m->set_result_index(rtf.type());
1948 #endif
1949
1950 if (args_size >= 0) {
1951 m->set_size_of_parameters(args_size);
1952 } else {
1953 m->compute_size_of_parameters(THREAD);
1954 }
1955 #ifdef ASSERT
1956 if (args_size >= 0) {
1957 m->compute_size_of_parameters(THREAD);
1958 assert(args_size == m->size_of_parameters(), "");
1959 }
1960 #endif
1961
1962 // Fill in code attribute information
1963 m->set_max_stack(max_stack);
1964 m->set_max_locals(max_locals);
1965 m->constMethod()->set_stackmap_data(stackmap_data());
1966
1967 /**
1968 * The exception_table field is the flag used to indicate
1969 * that the methodOop and it's associated constMethodOop are partially
1970 * initialized and thus are exempt from pre/post GC verification. Once
1971 * the field is set, the oops are considered fully initialized so make
1972 * sure that the oops can pass verification when this field is set.
1973 */
1974 m->set_exception_table(exception_handlers());
1975
1976 // Copy byte codes
1977 m->set_code(code_start);
1978
1979 // Copy line number table
1980 if (linenumber_table != NULL) {
1981 memcpy(m->compressed_linenumber_table(),
1982 linenumber_table->buffer(), linenumber_table_length);
1983 }
1984
1985 // Copy checked exceptions
1986 if (checked_exceptions_length > 0) {
1987 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
1988 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
1989 }
1990
1991 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1992 *
1993 * Rules for LVT's and LVTT's are:
1994 * - There can be any number of LVT's and LVTT's.
1995 * - If there are n LVT's, it is the same as if there was just
1996 * one LVT containing all the entries from the n LVT's.
1997 * - There may be no more than one LVT entry per local variable.
1998 * Two LVT entries are 'equal' if these fields are the same:
1999 * start_pc, length, name, slot
2000 * - There may be no more than one LVTT entry per each LVT entry.
2001 * Each LVTT entry has to match some LVT entry.
2002 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2003 */
2004 if (total_lvt_length > 0) {
2005 int tbl_no, idx;
2006
2007 promoted_flags->set_has_localvariable_table();
2008
2009 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2010 initialize_hashtable(lvt_Hash);
2011
2012 // To fill LocalVariableTable in
2013 Classfile_LVT_Element* cf_lvt;
2014 LocalVariableTableElement* lvt = m->localvariable_table_start();
2015
2016 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2017 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2018 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2019 copy_lvt_element(&cf_lvt[idx], lvt);
2020 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2021 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2022 && _need_verify
2023 && _major_version >= JAVA_1_5_VERSION ) {
2024 clear_hashtable(lvt_Hash);
2025 classfile_parse_error("Duplicated LocalVariableTable attribute "
2026 "entry for '%s' in class file %s",
2027 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2028 CHECK_(nullHandle));
2029 }
2030 }
2031 }
2032
2033 // To merge LocalVariableTable and LocalVariableTypeTable
2034 Classfile_LVT_Element* cf_lvtt;
2035 LocalVariableTableElement lvtt_elem;
2036
2037 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2038 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2039 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2040 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2041 int index = hash(&lvtt_elem);
2042 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2043 if (entry == NULL) {
2044 if (_need_verify) {
2045 clear_hashtable(lvt_Hash);
2046 classfile_parse_error("LVTT entry for '%s' in class file %s "
2047 "does not match any LVT entry",
2048 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2049 CHECK_(nullHandle));
2050 }
2051 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2052 clear_hashtable(lvt_Hash);
2053 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2054 "entry for '%s' in class file %s",
2055 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2056 CHECK_(nullHandle));
2057 } else {
2058 // to add generic signatures into LocalVariableTable
2059 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2060 }
2061 }
2062 }
2063 clear_hashtable(lvt_Hash);
2064 }
2065
2066 *method_annotations = assemble_annotations(runtime_visible_annotations,
2067 runtime_visible_annotations_length,
2068 runtime_invisible_annotations,
2069 runtime_invisible_annotations_length,
2070 CHECK_(nullHandle));
2071 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
2072 runtime_visible_parameter_annotations_length,
2073 runtime_invisible_parameter_annotations,
2074 runtime_invisible_parameter_annotations_length,
2075 CHECK_(nullHandle));
2076 *method_default_annotations = assemble_annotations(annotation_default,
2077 annotation_default_length,
2078 NULL,
2079 0,
2080 CHECK_(nullHandle));
2081
2082 if (name == vmSymbols::finalize_method_name() &&
2083 signature == vmSymbols::void_method_signature()) {
2084 if (m->is_empty_method()) {
2085 _has_empty_finalizer = true;
2086 } else {
2087 _has_finalizer = true;
2088 }
2089 }
2090 if (name == vmSymbols::object_initializer_name() &&
2091 signature == vmSymbols::void_method_signature() &&
2092 m->is_vanilla_constructor()) {
2093 _has_vanilla_constructor = true;
2094 }
2095
2096 if (EnableMethodHandles && (m->is_method_handle_invoke() ||
2097 m->is_method_handle_adapter())) {
2098 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
2099 "Method handle invokers must be defined internally to the VM", nullHandle);
2100 }
2101
2102 return m;
2103 }
2104
2105
2106 // The promoted_flags parameter is used to pass relevant access_flags
2107 // from the methods back up to the containing klass. These flag values
2108 // are added to klass's access_flags.
2109
2110 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
2111 AccessFlags* promoted_flags,
2112 bool* has_final_method,
2113 objArrayOop* methods_annotations_oop,
2114 objArrayOop* methods_parameter_annotations_oop,
2115 objArrayOop* methods_default_annotations_oop,
2116 TRAPS) {
2117 ClassFileStream* cfs = stream();
2118 objArrayHandle nullHandle;
2119 typeArrayHandle method_annotations;
2120 typeArrayHandle method_parameter_annotations;
2121 typeArrayHandle method_default_annotations;
2122 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
2123 u2 length = cfs->get_u2_fast();
2124 if (length == 0) {
2125 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2126 } else {
2127 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2128 objArrayHandle methods(THREAD, m);
2129 HandleMark hm(THREAD);
2130 objArrayHandle methods_annotations;
2131 objArrayHandle methods_parameter_annotations;
2132 objArrayHandle methods_default_annotations;
2133 for (int index = 0; index < length; index++) {
2134 methodHandle method = parse_method(cp, is_interface,
2135 promoted_flags,
2136 &method_annotations,
2137 &method_parameter_annotations,
2138 &method_default_annotations,
2139 CHECK_(nullHandle));
2140 if (method->is_final()) {
2141 *has_final_method = true;
2142 }
2143 methods->obj_at_put(index, method());
2144 if (method_annotations.not_null()) {
2145 if (methods_annotations.is_null()) {
2146 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2147 methods_annotations = objArrayHandle(THREAD, md);
2148 }
2149 methods_annotations->obj_at_put(index, method_annotations());
2150 }
2151 if (method_parameter_annotations.not_null()) {
2152 if (methods_parameter_annotations.is_null()) {
2153 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2154 methods_parameter_annotations = objArrayHandle(THREAD, md);
2155 }
2156 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
2157 }
2158 if (method_default_annotations.not_null()) {
2159 if (methods_default_annotations.is_null()) {
2160 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2161 methods_default_annotations = objArrayHandle(THREAD, md);
2162 }
2163 methods_default_annotations->obj_at_put(index, method_default_annotations());
2164 }
2165 }
2166 if (_need_verify && length > 1) {
2167 // Check duplicated methods
2168 ResourceMark rm(THREAD);
2169 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2170 THREAD, NameSigHash*, HASH_ROW_SIZE);
2171 initialize_hashtable(names_and_sigs);
2172 bool dup = false;
2173 {
2174 debug_only(No_Safepoint_Verifier nsv;)
2175 for (int i = 0; i < length; i++) {
2176 methodOop m = (methodOop)methods->obj_at(i);
2177 // If no duplicates, add name/signature in hashtable names_and_sigs.
2178 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2179 dup = true;
2180 break;
2181 }
2182 }
2183 }
2184 if (dup) {
2185 classfile_parse_error("Duplicate method name&signature in class file %s",
2186 CHECK_(nullHandle));
2187 }
2188 }
2189
2190 *methods_annotations_oop = methods_annotations();
2191 *methods_parameter_annotations_oop = methods_parameter_annotations();
2192 *methods_default_annotations_oop = methods_default_annotations();
2193
2194 return methods;
2195 }
2196 }
2197
2198
2199 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
2200 objArrayHandle methods_annotations,
2201 objArrayHandle methods_parameter_annotations,
2202 objArrayHandle methods_default_annotations,
2203 TRAPS) {
2204 typeArrayHandle nullHandle;
2205 int length = methods()->length();
2206 // If JVMTI original method ordering is enabled we have to
2207 // remember the original class file ordering.
2208 // We temporarily use the vtable_index field in the methodOop to store the
2209 // class file index, so we can read in after calling qsort.
2210 if (JvmtiExport::can_maintain_original_method_order()) {
2211 for (int index = 0; index < length; index++) {
2212 methodOop m = methodOop(methods->obj_at(index));
2213 assert(!m->valid_vtable_index(), "vtable index should not be set");
2214 m->set_vtable_index(index);
2215 }
2216 }
2217 // Sort method array by ascending method name (for faster lookups & vtable construction)
2218 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2219 methodOopDesc::sort_methods(methods(),
2220 methods_annotations(),
2221 methods_parameter_annotations(),
2222 methods_default_annotations());
2223
2224 // If JVMTI original method ordering is enabled construct int array remembering the original ordering
2225 if (JvmtiExport::can_maintain_original_method_order()) {
2226 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
2227 typeArrayHandle method_ordering(THREAD, new_ordering);
2228 for (int index = 0; index < length; index++) {
2229 methodOop m = methodOop(methods->obj_at(index));
2230 int old_index = m->vtable_index();
2231 assert(old_index >= 0 && old_index < length, "invalid method index");
2232 method_ordering->int_at_put(index, old_index);
2233 m->set_vtable_index(methodOopDesc::invalid_vtable_index);
2234 }
2235 return method_ordering;
2236 } else {
2237 return typeArrayHandle(THREAD, Universe::the_empty_int_array());
2238 }
2239 }
2240
2241
2242 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2243 ClassFileStream* cfs = stream();
2244 cfs->guarantee_more(2, CHECK); // sourcefile_index
2245 u2 sourcefile_index = cfs->get_u2_fast();
2246 check_property(
2247 valid_cp_range(sourcefile_index, cp->length()) &&
2248 cp->tag_at(sourcefile_index).is_utf8(),
2249 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2250 sourcefile_index, CHECK);
2251 k->set_source_file_name(cp->symbol_at(sourcefile_index));
2252 }
2253
2254
2255
2256 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2257 instanceKlassHandle k,
2258 int length, TRAPS) {
2259 ClassFileStream* cfs = stream();
2260 u1* sde_buffer = cfs->get_u1_buffer();
2261 assert(sde_buffer != NULL, "null sde buffer");
2262
2263 // Don't bother storing it if there is no way to retrieve it
2264 if (JvmtiExport::can_get_source_debug_extension()) {
2265 // Optimistically assume that only 1 byte UTF format is used
2266 // (common case)
2267 TempNewSymbol sde_symbol = SymbolTable::new_symbol((const char*)sde_buffer, length, CHECK);
2268 k->set_source_debug_extension(sde_symbol);
2269 // Note that set_source_debug_extension() increments the reference count
2270 // for its copy of the Symbol*, so use a TempNewSymbol here.
2271 }
2272 // Got utf8 string, set stream position forward
2273 cfs->skip_u1(length, CHECK);
2274 }
2275
2276
2277 // Inner classes can be static, private or protected (classic VM does this)
2278 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2279
2280 // Return number of classes in the inner classes attribute table
2281 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2282 ClassFileStream* cfs = stream();
2283 cfs->guarantee_more(2, CHECK_0); // length
2284 u2 length = cfs->get_u2_fast();
2285
2286 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
2287 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);
2288 typeArrayHandle inner_classes(THREAD, ic);
2289 int index = 0;
2290 int cp_size = cp->length();
2291 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2292 for (int n = 0; n < length; n++) {
2293 // Inner class index
2294 u2 inner_class_info_index = cfs->get_u2_fast();
2295 check_property(
2296 inner_class_info_index == 0 ||
2297 (valid_cp_range(inner_class_info_index, cp_size) &&
2298 is_klass_reference(cp, inner_class_info_index)),
2299 "inner_class_info_index %u has bad constant type in class file %s",
2300 inner_class_info_index, CHECK_0);
2301 // Outer class index
2302 u2 outer_class_info_index = cfs->get_u2_fast();
2303 check_property(
2304 outer_class_info_index == 0 ||
2305 (valid_cp_range(outer_class_info_index, cp_size) &&
2306 is_klass_reference(cp, outer_class_info_index)),
2307 "outer_class_info_index %u has bad constant type in class file %s",
2308 outer_class_info_index, CHECK_0);
2309 // Inner class name
2310 u2 inner_name_index = cfs->get_u2_fast();
2311 check_property(
2312 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2313 cp->tag_at(inner_name_index).is_utf8()),
2314 "inner_name_index %u has bad constant type in class file %s",
2315 inner_name_index, CHECK_0);
2316 if (_need_verify) {
2317 guarantee_property(inner_class_info_index != outer_class_info_index,
2318 "Class is both outer and inner class in class file %s", CHECK_0);
2319 }
2320 // Access flags
2321 AccessFlags inner_access_flags;
2322 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2323 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2324 // Set abstract bit for old class files for backward compatibility
2325 flags |= JVM_ACC_ABSTRACT;
2326 }
2327 verify_legal_class_modifiers(flags, CHECK_0);
2328 inner_access_flags.set_flags(flags);
2329
2330 inner_classes->short_at_put(index++, inner_class_info_index);
2331 inner_classes->short_at_put(index++, outer_class_info_index);
2332 inner_classes->short_at_put(index++, inner_name_index);
2333 inner_classes->short_at_put(index++, inner_access_flags.as_short());
2334 }
2335
2336 // 4347400: make sure there's no duplicate entry in the classes array
2337 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2338 for(int i = 0; i < inner_classes->length(); i += 4) {
2339 for(int j = i + 4; j < inner_classes->length(); j += 4) {
2340 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
2341 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2342 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2343 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2344 "Duplicate entry in InnerClasses in class file %s",
2345 CHECK_0);
2346 }
2347 }
2348 }
2349
2350 // Update instanceKlass with inner class info.
2351 k->set_inner_classes(inner_classes());
2352 return length;
2353 }
2354
2355 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2356 k->set_is_synthetic();
2357 }
2358
2359 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2360 ClassFileStream* cfs = stream();
2361 u2 signature_index = cfs->get_u2(CHECK);
2362 check_property(
2363 valid_cp_range(signature_index, cp->length()) &&
2364 cp->tag_at(signature_index).is_utf8(),
2365 "Invalid constant pool index %u in Signature attribute in class file %s",
2366 signature_index, CHECK);
2367 k->set_generic_signature(cp->symbol_at(signature_index));
2368 }
2369
2370 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k,
2371 u4 attribute_byte_length, TRAPS) {
2372 ClassFileStream* cfs = stream();
2373 u1* current_start = cfs->current();
2374
2375 cfs->guarantee_more(2, CHECK); // length
2376 int attribute_array_length = cfs->get_u2_fast();
2377
2378 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2379 "Short length on BootstrapMethods in class file %s",
2380 CHECK);
2381
2382 // The attribute contains a counted array of counted tuples of shorts,
2383 // represending bootstrap specifiers:
2384 // length*{bootstrap_method_index, argument_count*{argument_index}}
2385 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2386 // operand_count = number of shorts in attr, except for leading length
2387
2388 // The attribute is copied into a short[] array.
2389 // The array begins with a series of short[2] pairs, one for each tuple.
2390 int index_size = (attribute_array_length * 2);
2391
2392 typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK);
2393 typeArrayHandle operands(THREAD, operands_oop);
2394 operands_oop = NULL; // tidy
2395
2396 int operand_fill_index = index_size;
2397 int cp_size = cp->length();
2398
2399 for (int n = 0; n < attribute_array_length; n++) {
2400 // Store a 32-bit offset into the header of the operand array.
2401 assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, "");
2402 constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index);
2403
2404 // Read a bootstrap specifier.
2405 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2406 u2 bootstrap_method_index = cfs->get_u2_fast();
2407 u2 argument_count = cfs->get_u2_fast();
2408 check_property(
2409 valid_cp_range(bootstrap_method_index, cp_size) &&
2410 cp->tag_at(bootstrap_method_index).is_method_handle(),
2411 "bootstrap_method_index %u has bad constant type in class file %s",
2412 bootstrap_method_index,
2413 CHECK);
2414 operands->short_at_put(operand_fill_index++, bootstrap_method_index);
2415 operands->short_at_put(operand_fill_index++, argument_count);
2416
2417 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2418 for (int j = 0; j < argument_count; j++) {
2419 u2 argument_index = cfs->get_u2_fast();
2420 check_property(
2421 valid_cp_range(argument_index, cp_size) &&
2422 cp->tag_at(argument_index).is_loadable_constant(),
2423 "argument_index %u has bad constant type in class file %s",
2424 argument_index,
2425 CHECK);
2426 operands->short_at_put(operand_fill_index++, argument_index);
2427 }
2428 }
2429
2430 assert(operand_fill_index == operands()->length(), "exact fill");
2431 assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode");
2432
2433 u1* current_end = cfs->current();
2434 guarantee_property(current_end == current_start + attribute_byte_length,
2435 "Bad length on BootstrapMethods in class file %s",
2436 CHECK);
2437
2438 cp->set_operands(operands());
2439 }
2440
2441
2442 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2443 ClassFileStream* cfs = stream();
2444 // Set inner classes attribute to default sentinel
2445 k->set_inner_classes(Universe::the_empty_short_array());
2446 cfs->guarantee_more(2, CHECK); // attributes_count
2447 u2 attributes_count = cfs->get_u2_fast();
2448 bool parsed_sourcefile_attribute = false;
2449 bool parsed_innerclasses_attribute = false;
2450 bool parsed_enclosingmethod_attribute = false;
2451 bool parsed_bootstrap_methods_attribute = false;
2452 u1* runtime_visible_annotations = NULL;
2453 int runtime_visible_annotations_length = 0;
2454 u1* runtime_invisible_annotations = NULL;
2455 int runtime_invisible_annotations_length = 0;
2456 // Iterate over attributes
2457 while (attributes_count--) {
2458 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2459 u2 attribute_name_index = cfs->get_u2_fast();
2460 u4 attribute_length = cfs->get_u4_fast();
2461 check_property(
2462 valid_cp_range(attribute_name_index, cp->length()) &&
2463 cp->tag_at(attribute_name_index).is_utf8(),
2464 "Attribute name has bad constant pool index %u in class file %s",
2465 attribute_name_index, CHECK);
2466 Symbol* tag = cp->symbol_at(attribute_name_index);
2467 if (tag == vmSymbols::tag_source_file()) {
2468 // Check for SourceFile tag
2469 if (_need_verify) {
2470 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2471 }
2472 if (parsed_sourcefile_attribute) {
2473 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2474 } else {
2475 parsed_sourcefile_attribute = true;
2476 }
2477 parse_classfile_sourcefile_attribute(cp, k, CHECK);
2478 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2479 // Check for SourceDebugExtension tag
2480 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
2481 } else if (tag == vmSymbols::tag_inner_classes()) {
2482 // Check for InnerClasses tag
2483 if (parsed_innerclasses_attribute) {
2484 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2485 } else {
2486 parsed_innerclasses_attribute = true;
2487 }
2488 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
2489 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2490 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2491 "Wrong InnerClasses attribute length in class file %s", CHECK);
2492 }
2493 } else if (tag == vmSymbols::tag_synthetic()) {
2494 // Check for Synthetic tag
2495 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2496 if (attribute_length != 0) {
2497 classfile_parse_error(
2498 "Invalid Synthetic classfile attribute length %u in class file %s",
2499 attribute_length, CHECK);
2500 }
2501 parse_classfile_synthetic_attribute(cp, k, CHECK);
2502 } else if (tag == vmSymbols::tag_deprecated()) {
2503 // Check for Deprecatd tag - 4276120
2504 if (attribute_length != 0) {
2505 classfile_parse_error(
2506 "Invalid Deprecated classfile attribute length %u in class file %s",
2507 attribute_length, CHECK);
2508 }
2509 } else if (_major_version >= JAVA_1_5_VERSION) {
2510 if (tag == vmSymbols::tag_signature()) {
2511 if (attribute_length != 2) {
2512 classfile_parse_error(
2513 "Wrong Signature attribute length %u in class file %s",
2514 attribute_length, CHECK);
2515 }
2516 parse_classfile_signature_attribute(cp, k, CHECK);
2517 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2518 runtime_visible_annotations_length = attribute_length;
2519 runtime_visible_annotations = cfs->get_u1_buffer();
2520 assert(runtime_visible_annotations != NULL, "null visible annotations");
2521 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2522 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2523 runtime_invisible_annotations_length = attribute_length;
2524 runtime_invisible_annotations = cfs->get_u1_buffer();
2525 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2526 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2527 } else if (tag == vmSymbols::tag_enclosing_method()) {
2528 if (parsed_enclosingmethod_attribute) {
2529 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2530 } else {
2531 parsed_enclosingmethod_attribute = true;
2532 }
2533 cfs->guarantee_more(4, CHECK); // class_index, method_index
2534 u2 class_index = cfs->get_u2_fast();
2535 u2 method_index = cfs->get_u2_fast();
2536 if (class_index == 0) {
2537 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2538 }
2539 // Validate the constant pool indices and types
2540 if (!cp->is_within_bounds(class_index) ||
2541 !is_klass_reference(cp, class_index)) {
2542 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2543 }
2544 if (method_index != 0 &&
2545 (!cp->is_within_bounds(method_index) ||
2546 !cp->tag_at(method_index).is_name_and_type())) {
2547 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2548 }
2549 k->set_enclosing_method_indices(class_index, method_index);
2550 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2551 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2552 if (parsed_bootstrap_methods_attribute)
2553 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2554 parsed_bootstrap_methods_attribute = true;
2555 parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK);
2556 } else {
2557 // Unknown attribute
2558 cfs->skip_u1(attribute_length, CHECK);
2559 }
2560 } else {
2561 // Unknown attribute
2562 cfs->skip_u1(attribute_length, CHECK);
2563 }
2564 }
2565 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2566 runtime_visible_annotations_length,
2567 runtime_invisible_annotations,
2568 runtime_invisible_annotations_length,
2569 CHECK);
2570 k->set_class_annotations(annotations());
2571
2572 if (_max_bootstrap_specifier_index >= 0) {
2573 guarantee_property(parsed_bootstrap_methods_attribute,
2574 "Missing BootstrapMethods attribute in class file %s", CHECK);
2575 }
2576 }
2577
2578
2579 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2580 int runtime_visible_annotations_length,
2581 u1* runtime_invisible_annotations,
2582 int runtime_invisible_annotations_length, TRAPS) {
2583 typeArrayHandle annotations;
2584 if (runtime_visible_annotations != NULL ||
2585 runtime_invisible_annotations != NULL) {
2586 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2587 runtime_invisible_annotations_length, CHECK_(annotations));
2588 annotations = typeArrayHandle(THREAD, anno);
2589 if (runtime_visible_annotations != NULL) {
2590 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2591 }
2592 if (runtime_invisible_annotations != NULL) {
2593 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2594 }
2595 }
2596 return annotations;
2597 }
2598
2599
2600 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
2601 KlassHandle h_k (THREAD, fd->field_holder());
2602 assert(h_k.not_null() && fd->is_static(), "just checking");
2603 if (fd->has_initial_value()) {
2604 BasicType t = fd->field_type();
2605 switch (t) {
2606 case T_BYTE:
2607 h_k()->byte_field_put(fd->offset(), fd->int_initial_value());
2608 break;
2609 case T_BOOLEAN:
2610 h_k()->bool_field_put(fd->offset(), fd->int_initial_value());
2611 break;
2612 case T_CHAR:
2613 h_k()->char_field_put(fd->offset(), fd->int_initial_value());
2614 break;
2615 case T_SHORT:
2616 h_k()->short_field_put(fd->offset(), fd->int_initial_value());
2617 break;
2618 case T_INT:
2619 h_k()->int_field_put(fd->offset(), fd->int_initial_value());
2620 break;
2621 case T_FLOAT:
2622 h_k()->float_field_put(fd->offset(), fd->float_initial_value());
2623 break;
2624 case T_DOUBLE:
2625 h_k()->double_field_put(fd->offset(), fd->double_initial_value());
2626 break;
2627 case T_LONG:
2628 h_k()->long_field_put(fd->offset(), fd->long_initial_value());
2629 break;
2630 case T_OBJECT:
2631 {
2632 #ifdef ASSERT
2633 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
2634 assert(fd->signature() == sym, "just checking");
2635 #endif
2636 oop string = fd->string_initial_value(CHECK);
2637 h_k()->obj_field_put(fd->offset(), string);
2638 }
2639 break;
2640 default:
2641 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
2642 "Illegal ConstantValue attribute in class file");
2643 }
2644 }
2645 }
2646
2647
2648 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
2649 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) {
2650 // This code is for compatibility with earlier jdk's that do not
2651 // have the "discovered" field in java.lang.ref.Reference. For 1.5
2652 // the check for the "discovered" field should issue a warning if
2653 // the field is not found. For 1.6 this code should be issue a
2654 // fatal error if the "discovered" field is not found.
2655 //
2656 // Increment fac.nonstatic_oop_count so that the start of the
2657 // next type of non-static oops leaves room for the fake oop.
2658 // Do not increment next_nonstatic_oop_offset so that the
2659 // fake oop is place after the java.lang.ref.Reference oop
2660 // fields.
2661 //
2662 // Check the fields in java.lang.ref.Reference for the "discovered"
2663 // field. If it is not present, artifically create a field for it.
2664 // This allows this VM to run on early JDK where the field is not
2665 // present.
2666 int reference_sig_index = 0;
2667 int reference_name_index = 0;
2668 int reference_index = 0;
2669 int extra = java_lang_ref_Reference::number_of_fake_oop_fields;
2670 const int n = (*fields_ptr)()->length();
2671 for (int i = 0; i < n; i += instanceKlass::next_offset ) {
2672 int name_index =
2673 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset);
2674 int sig_index =
2675 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset);
2676 Symbol* f_name = cp->symbol_at(name_index);
2677 Symbol* f_sig = cp->symbol_at(sig_index);
2678 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) {
2679 // Save the index for reference signature for later use.
2680 // The fake discovered field does not entries in the
2681 // constant pool so the index for its signature cannot
2682 // be extracted from the constant pool. It will need
2683 // later, however. It's signature is vmSymbols::reference_signature()
2684 // so same an index for that signature.
2685 reference_sig_index = sig_index;
2686 reference_name_index = name_index;
2687 reference_index = i;
2688 }
2689 if (f_name == vmSymbols::reference_discovered_name() &&
2690 f_sig == vmSymbols::reference_signature()) {
2691 // The values below are fake but will force extra
2692 // non-static oop fields and a corresponding non-static
2693 // oop map block to be allocated.
2694 extra = 0;
2695 break;
2696 }
2697 }
2698 if (extra != 0) {
2699 fac_ptr->nonstatic_oop_count += extra;
2700 // Add the additional entry to "fields" so that the klass
2701 // contains the "discoverd" field and the field will be initialized
2702 // in instances of the object.
2703 int fields_with_fix_length = (*fields_ptr)()->length() +
2704 instanceKlass::next_offset;
2705 typeArrayOop ff = oopFactory::new_permanent_shortArray(
2706 fields_with_fix_length, CHECK);
2707 typeArrayHandle fields_with_fix(THREAD, ff);
2708
2709 // Take everything from the original but the length.
2710 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) {
2711 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx));
2712 }
2713
2714 // Add the fake field at the end.
2715 int i = (*fields_ptr)->length();
2716 // There is no name index for the fake "discovered" field nor
2717 // signature but a signature is needed so that the field will
2718 // be properly initialized. Use one found for
2719 // one of the other reference fields. Be sure the index for the
2720 // name is 0. In fieldDescriptor::initialize() the index of the
2721 // name is checked. That check is by passed for the last nonstatic
2722 // oop field in a java.lang.ref.Reference which is assumed to be
2723 // this artificial "discovered" field. An assertion checks that
2724 // the name index is 0.
2725 assert(reference_index != 0, "Missing signature for reference");
2726
2727 int j;
2728 for (j = 0; j < instanceKlass::next_offset; j++) {
2729 fields_with_fix->ushort_at_put(i + j,
2730 (*fields_ptr)->ushort_at(reference_index +j));
2731 }
2732 // Clear the public access flag and set the private access flag.
2733 short flags;
2734 flags =
2735 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset);
2736 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set");
2737 flags = flags & (~JVM_ACC_PUBLIC);
2738 flags = flags | JVM_ACC_PRIVATE;
2739 AccessFlags access_flags;
2740 access_flags.set_flags(flags);
2741 assert(!access_flags.is_public(), "Failed to clear public flag");
2742 assert(access_flags.is_private(), "Failed to set private flag");
2743 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset,
2744 flags);
2745
2746 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset)
2747 == reference_name_index, "The fake reference name is incorrect");
2748 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset)
2749 == reference_sig_index, "The fake reference signature is incorrect");
2750 // The type of the field is stored in the low_offset entry during
2751 // parsing.
2752 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) ==
2753 NONSTATIC_OOP, "The fake reference type is incorrect");
2754
2755 // "fields" is allocated in the permanent generation. Disgard
2756 // it and let it be collected.
2757 (*fields_ptr) = fields_with_fix;
2758 }
2759 return;
2760 }
2761
2762
2763 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
2764 FieldAllocationCount *fac_ptr, TRAPS) {
2765 // Add fake fields for java.lang.Class instances
2766 //
2767 // This is not particularly nice. We should consider adding a
2768 // private transient object field at the Java level to
2769 // java.lang.Class. Alternatively we could add a subclass of
2770 // instanceKlass which provides an accessor and size computer for
2771 // this field, but that appears to be more code than this hack.
2772 //
2773 // NOTE that we wedge these in at the beginning rather than the
2774 // end of the object because the Class layout changed between JDK
2775 // 1.3 and JDK 1.4 with the new reflection implementation; some
2776 // nonstatic oop fields were added at the Java level. The offsets
2777 // of these fake fields can't change between these two JDK
2778 // versions because when the offsets are computed at bootstrap
2779 // time we don't know yet which version of the JDK we're running in.
2780
2781 // The values below are fake but will force two non-static oop fields and
2782 // a corresponding non-static oop map block to be allocated.
2783 const int extra = java_lang_Class::number_of_fake_oop_fields;
2784 fac_ptr->nonstatic_oop_count += extra;
2785 }
2786
2787
2788 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) {
2789 // Cause the extra fake fields in java.lang.Class to show up before
2790 // the Java fields for layout compatibility between 1.3 and 1.4
2791 // Incrementing next_nonstatic_oop_offset here advances the
2792 // location where the real java fields are placed.
2793 const int extra = java_lang_Class::number_of_fake_oop_fields;
2794 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize);
2795 }
2796
2797
2798 // Force MethodHandle.vmentry to be an unmanaged pointer.
2799 // There is no way for a classfile to express this, so we must help it.
2800 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp,
2801 typeArrayHandle fields,
2802 FieldAllocationCount *fac_ptr,
2803 TRAPS) {
2804 // Add fake fields for java.dyn.MethodHandle instances
2805 //
2806 // This is not particularly nice, but since there is no way to express
2807 // a native wordSize field in Java, we must do it at this level.
2808
2809 if (!EnableMethodHandles) return;
2810
2811 int word_sig_index = 0;
2812 const int cp_size = cp->length();
2813 for (int index = 1; index < cp_size; index++) {
2814 if (cp->tag_at(index).is_utf8() &&
2815 cp->symbol_at(index) == vmSymbols::machine_word_signature()) {
2816 word_sig_index = index;
2817 break;
2818 }
2819 }
2820
2821 if (word_sig_index == 0)
2822 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2823 "missing I or J signature (for vmentry) in java.dyn.MethodHandle");
2824
2825 // Find vmentry field and change the signature.
2826 bool found_vmentry = false;
2827 for (int i = 0; i < fields->length(); i += instanceKlass::next_offset) {
2828 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
2829 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
2830 int acc_flags = fields->ushort_at(i + instanceKlass::access_flags_offset);
2831 Symbol* f_name = cp->symbol_at(name_index);
2832 Symbol* f_sig = cp->symbol_at(sig_index);
2833 if (f_name == vmSymbols::vmentry_name() && (acc_flags & JVM_ACC_STATIC) == 0) {
2834 if (f_sig == vmSymbols::machine_word_signature()) {
2835 // If the signature of vmentry is already changed, we're done.
2836 found_vmentry = true;
2837 break;
2838 }
2839 else if (f_sig == vmSymbols::byte_signature()) {
2840 // Adjust the field type from byte to an unmanaged pointer.
2841 assert(fac_ptr->nonstatic_byte_count > 0, "");
2842 fac_ptr->nonstatic_byte_count -= 1;
2843
2844 fields->ushort_at_put(i + instanceKlass::signature_index_offset, word_sig_index);
2845 assert(wordSize == longSize || wordSize == jintSize, "ILP32 or LP64");
2846 if (wordSize == longSize) fac_ptr->nonstatic_double_count += 1;
2847 else fac_ptr->nonstatic_word_count += 1;
2848
2849 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
2850 assert(atype == NONSTATIC_BYTE, "");
2851 FieldAllocationType new_atype = (wordSize == longSize) ? NONSTATIC_DOUBLE : NONSTATIC_WORD;
2852 fields->ushort_at_put(i + instanceKlass::low_offset, new_atype);
2853
2854 found_vmentry = true;
2855 break;
2856 }
2857 }
2858 }
2859
2860 if (!found_vmentry)
2861 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2862 "missing vmentry byte field in java.dyn.MethodHandle");
2863 }
2864
2865
2866 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2867 Handle class_loader,
2868 Handle protection_domain,
2869 KlassHandle host_klass,
2870 GrowableArray<Handle>* cp_patches,
2871 TempNewSymbol& parsed_name,
2872 bool verify,
2873 TRAPS) {
2874 // So that JVMTI can cache class file in the state before retransformable agents
2875 // have modified it
2876 unsigned char *cached_class_file_bytes = NULL;
2877 jint cached_class_file_length;
2878
2879 ClassFileStream* cfs = stream();
2880 // Timing
2881 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2882 JavaThread* jt = (JavaThread*) THREAD;
2883
2884 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2885 ClassLoader::perf_class_parse_selftime(),
2886 NULL,
2887 jt->get_thread_stat()->perf_recursion_counts_addr(),
2888 jt->get_thread_stat()->perf_timers_addr(),
2889 PerfClassTraceTime::PARSE_CLASS);
2890
2891 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
2892 _max_bootstrap_specifier_index = -1;
2893
2894 if (JvmtiExport::should_post_class_file_load_hook()) {
2895 unsigned char* ptr = cfs->buffer();
2896 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2897
2898 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2899 &ptr, &end_ptr,
2900 &cached_class_file_bytes,
2901 &cached_class_file_length);
2902
2903 if (ptr != cfs->buffer()) {
2904 // JVMTI agent has modified class file data.
2905 // Set new class file stream using JVMTI agent modified
2906 // class file data.
2907 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2908 set_stream(cfs);
2909 }
2910 }
2911
2912 _host_klass = host_klass;
2913 _cp_patches = cp_patches;
2914
2915 instanceKlassHandle nullHandle;
2916
2917 // Figure out whether we can skip format checking (matching classic VM behavior)
2918 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2919
2920 // Set the verify flag in stream
2921 cfs->set_verify(_need_verify);
2922
2923 // Save the class file name for easier error message printing.
2924 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2925
2926 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2927 // Magic value
2928 u4 magic = cfs->get_u4_fast();
2929 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2930 "Incompatible magic value %u in class file %s",
2931 magic, CHECK_(nullHandle));
2932
2933 // Version numbers
2934 u2 minor_version = cfs->get_u2_fast();
2935 u2 major_version = cfs->get_u2_fast();
2936
2937 // Check version numbers - we check this even with verifier off
2938 if (!is_supported_version(major_version, minor_version)) {
2939 if (name == NULL) {
2940 Exceptions::fthrow(
2941 THREAD_AND_LOCATION,
2942 vmSymbols::java_lang_UnsupportedClassVersionError(),
2943 "Unsupported major.minor version %u.%u",
2944 major_version,
2945 minor_version);
2946 } else {
2947 ResourceMark rm(THREAD);
2948 Exceptions::fthrow(
2949 THREAD_AND_LOCATION,
2950 vmSymbols::java_lang_UnsupportedClassVersionError(),
2951 "%s : Unsupported major.minor version %u.%u",
2952 name->as_C_string(),
2953 major_version,
2954 minor_version);
2955 }
2956 return nullHandle;
2957 }
2958
2959 _major_version = major_version;
2960 _minor_version = minor_version;
2961
2962
2963 // Check if verification needs to be relaxed for this class file
2964 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
2965 _relax_verify = Verifier::relax_verify_for(class_loader());
2966
2967 // Constant pool
2968 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
2969 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
2970
2971 int cp_size = cp->length();
2972
2973 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
2974
2975 // Access flags
2976 AccessFlags access_flags;
2977 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
2978
2979 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2980 // Set abstract bit for old class files for backward compatibility
2981 flags |= JVM_ACC_ABSTRACT;
2982 }
2983 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
2984 access_flags.set_flags(flags);
2985
2986 // This class and superclass
2987 instanceKlassHandle super_klass;
2988 u2 this_class_index = cfs->get_u2_fast();
2989 check_property(
2990 valid_cp_range(this_class_index, cp_size) &&
2991 cp->tag_at(this_class_index).is_unresolved_klass(),
2992 "Invalid this class index %u in constant pool in class file %s",
2993 this_class_index, CHECK_(nullHandle));
2994
2995 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
2996 assert(class_name != NULL, "class_name can't be null");
2997
2998 // It's important to set parsed_name *before* resolving the super class.
2999 // (it's used for cleanup by the caller if parsing fails)
3000 parsed_name = class_name;
3001 // parsed_name is returned and can be used if there's an error, so add to
3002 // its reference count. Caller will decrement the refcount.
3003 parsed_name->increment_refcount();
3004
3005 // Update _class_name which could be null previously to be class_name
3006 _class_name = class_name;
3007
3008 // Don't need to check whether this class name is legal or not.
3009 // It has been checked when constant pool is parsed.
3010 // However, make sure it is not an array type.
3011 if (_need_verify) {
3012 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3013 "Bad class name in class file %s",
3014 CHECK_(nullHandle));
3015 }
3016
3017 klassOop preserve_this_klass; // for storing result across HandleMark
3018
3019 // release all handles when parsing is done
3020 { HandleMark hm(THREAD);
3021
3022 // Checks if name in class file matches requested name
3023 if (name != NULL && class_name != name) {
3024 ResourceMark rm(THREAD);
3025 Exceptions::fthrow(
3026 THREAD_AND_LOCATION,
3027 vmSymbols::java_lang_NoClassDefFoundError(),
3028 "%s (wrong name: %s)",
3029 name->as_C_string(),
3030 class_name->as_C_string()
3031 );
3032 return nullHandle;
3033 }
3034
3035 if (TraceClassLoadingPreorder) {
3036 tty->print("[Loading %s", name->as_klass_external_name());
3037 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3038 tty->print_cr("]");
3039 }
3040
3041 u2 super_class_index = cfs->get_u2_fast();
3042 if (super_class_index == 0) {
3043 check_property(class_name == vmSymbols::java_lang_Object(),
3044 "Invalid superclass index %u in class file %s",
3045 super_class_index,
3046 CHECK_(nullHandle));
3047 } else {
3048 check_property(valid_cp_range(super_class_index, cp_size) &&
3049 is_klass_reference(cp, super_class_index),
3050 "Invalid superclass index %u in class file %s",
3051 super_class_index,
3052 CHECK_(nullHandle));
3053 // The class name should be legal because it is checked when parsing constant pool.
3054 // However, make sure it is not an array type.
3055 bool is_array = false;
3056 if (cp->tag_at(super_class_index).is_klass()) {
3057 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3058 if (_need_verify)
3059 is_array = super_klass->oop_is_array();
3060 } else if (_need_verify) {
3061 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3062 }
3063 if (_need_verify) {
3064 guarantee_property(!is_array,
3065 "Bad superclass name in class file %s", CHECK_(nullHandle));
3066 }
3067 }
3068
3069 // Interfaces
3070 u2 itfs_len = cfs->get_u2_fast();
3071 objArrayHandle local_interfaces;
3072 if (itfs_len == 0) {
3073 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3074 } else {
3075 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
3076 }
3077
3078 // Fields (offsets are filled in later)
3079 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0};
3080 objArrayHandle fields_annotations;
3081 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle));
3082 // Methods
3083 bool has_final_method = false;
3084 AccessFlags promoted_flags;
3085 promoted_flags.set_flags(0);
3086 // These need to be oop pointers because they are allocated lazily
3087 // inside parse_methods inside a nested HandleMark
3088 objArrayOop methods_annotations_oop = NULL;
3089 objArrayOop methods_parameter_annotations_oop = NULL;
3090 objArrayOop methods_default_annotations_oop = NULL;
3091 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
3092 &promoted_flags,
3093 &has_final_method,
3094 &methods_annotations_oop,
3095 &methods_parameter_annotations_oop,
3096 &methods_default_annotations_oop,
3097 CHECK_(nullHandle));
3098
3099 objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
3100 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
3101 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
3102
3103 // We check super class after class file is parsed and format is checked
3104 if (super_class_index > 0 && super_klass.is_null()) {
3105 Symbol* sk = cp->klass_name_at(super_class_index);
3106 if (access_flags.is_interface()) {
3107 // Before attempting to resolve the superclass, check for class format
3108 // errors not checked yet.
3109 guarantee_property(sk == vmSymbols::java_lang_Object(),
3110 "Interfaces must have java.lang.Object as superclass in class file %s",
3111 CHECK_(nullHandle));
3112 }
3113 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
3114 sk,
3115 class_loader,
3116 protection_domain,
3117 true,
3118 CHECK_(nullHandle));
3119
3120 KlassHandle kh (THREAD, k);
3121 super_klass = instanceKlassHandle(THREAD, kh());
3122 if (LinkWellKnownClasses) // my super class is well known to me
3123 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
3124 }
3125 if (super_klass.not_null()) {
3126 if (super_klass->is_interface()) {
3127 ResourceMark rm(THREAD);
3128 Exceptions::fthrow(
3129 THREAD_AND_LOCATION,
3130 vmSymbols::java_lang_IncompatibleClassChangeError(),
3131 "class %s has interface %s as super class",
3132 class_name->as_klass_external_name(),
3133 super_klass->external_name()
3134 );
3135 return nullHandle;
3136 }
3137 // Make sure super class is not final
3138 if (super_klass->is_final()) {
3139 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3140 }
3141 }
3142
3143 // Compute the transitive list of all unique interfaces implemented by this class
3144 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
3145
3146 // sort methods
3147 typeArrayHandle method_ordering = sort_methods(methods,
3148 methods_annotations,
3149 methods_parameter_annotations,
3150 methods_default_annotations,
3151 CHECK_(nullHandle));
3152
3153 // promote flags from parse_methods() to the klass' flags
3154 access_flags.add_promoted_flags(promoted_flags.as_int());
3155
3156 // Size of Java vtable (in words)
3157 int vtable_size = 0;
3158 int itable_size = 0;
3159 int num_miranda_methods = 0;
3160
3161 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3162 num_miranda_methods,
3163 super_klass(),
3164 methods(),
3165 access_flags,
3166 class_loader,
3167 class_name,
3168 local_interfaces(),
3169 CHECK_(nullHandle));
3170
3171 // Size of Java itable (in words)
3172 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3173
3174 // Field size and offset computation
3175 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3176 #ifndef PRODUCT
3177 int orig_nonstatic_field_size = 0;
3178 #endif
3179 int static_field_size = 0;
3180 int next_static_oop_offset;
3181 int next_static_double_offset;
3182 int next_static_word_offset;
3183 int next_static_short_offset;
3184 int next_static_byte_offset;
3185 int next_static_type_offset;
3186 int next_nonstatic_oop_offset;
3187 int next_nonstatic_double_offset;
3188 int next_nonstatic_word_offset;
3189 int next_nonstatic_short_offset;
3190 int next_nonstatic_byte_offset;
3191 int next_nonstatic_type_offset;
3192 int first_nonstatic_oop_offset;
3193 int first_nonstatic_field_offset;
3194 int next_nonstatic_field_offset;
3195
3196 // Calculate the starting byte offsets
3197 next_static_oop_offset = (instanceKlass::header_size() +
3198 align_object_offset(vtable_size) +
3199 align_object_offset(itable_size)) * wordSize;
3200 next_static_double_offset = next_static_oop_offset +
3201 (fac.static_oop_count * heapOopSize);
3202 if ( fac.static_double_count &&
3203 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3204 Universe::field_type_should_be_aligned(T_LONG)) ) {
3205 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3206 }
3207
3208 next_static_word_offset = next_static_double_offset +
3209 (fac.static_double_count * BytesPerLong);
3210 next_static_short_offset = next_static_word_offset +
3211 (fac.static_word_count * BytesPerInt);
3212 next_static_byte_offset = next_static_short_offset +
3213 (fac.static_short_count * BytesPerShort);
3214 next_static_type_offset = align_size_up((next_static_byte_offset +
3215 fac.static_byte_count ), wordSize );
3216 static_field_size = (next_static_type_offset -
3217 next_static_oop_offset) / wordSize;
3218 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3219 nonstatic_field_size * heapOopSize;
3220 next_nonstatic_field_offset = first_nonstatic_field_offset;
3221
3222 // Add fake fields for java.lang.Class instances (also see below)
3223 if (class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) {
3224 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle));
3225 }
3226
3227 // adjust the vmentry field declaration in java.dyn.MethodHandle
3228 if (EnableMethodHandles && class_name == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) {
3229 java_dyn_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle));
3230 }
3231
3232 // Add a fake "discovered" field if it is not present
3233 // for compatibility with earlier jdk's.
3234 if (class_name == vmSymbols::java_lang_ref_Reference()
3235 && class_loader.is_null()) {
3236 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle));
3237 }
3238 // end of "discovered" field compactibility fix
3239
3240 unsigned int nonstatic_double_count = fac.nonstatic_double_count;
3241 unsigned int nonstatic_word_count = fac.nonstatic_word_count;
3242 unsigned int nonstatic_short_count = fac.nonstatic_short_count;
3243 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count;
3244 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count;
3245
3246 bool super_has_nonstatic_fields =
3247 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3248 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3249 ((nonstatic_double_count + nonstatic_word_count +
3250 nonstatic_short_count + nonstatic_byte_count +
3251 nonstatic_oop_count) != 0);
3252
3253
3254 // Prepare list of oops for oop map generation.
3255 int* nonstatic_oop_offsets;
3256 unsigned int* nonstatic_oop_counts;
3257 unsigned int nonstatic_oop_map_count = 0;
3258
3259 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3260 THREAD, int, nonstatic_oop_count + 1);
3261 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3262 THREAD, unsigned int, nonstatic_oop_count + 1);
3263
3264 // Add fake fields for java.lang.Class instances (also see above).
3265 // FieldsAllocationStyle and CompactFields values will be reset to default.
3266 if(class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) {
3267 java_lang_Class_fix_post(&next_nonstatic_field_offset);
3268 nonstatic_oop_offsets[0] = first_nonstatic_field_offset;
3269 const uint fake_oop_count = (next_nonstatic_field_offset -
3270 first_nonstatic_field_offset) / heapOopSize;
3271 nonstatic_oop_counts[0] = fake_oop_count;
3272 nonstatic_oop_map_count = 1;
3273 nonstatic_oop_count -= fake_oop_count;
3274 first_nonstatic_oop_offset = first_nonstatic_field_offset;
3275 } else {
3276 first_nonstatic_oop_offset = 0; // will be set for first oop field
3277 }
3278
3279 #ifndef PRODUCT
3280 if( PrintCompactFieldsSavings ) {
3281 next_nonstatic_double_offset = next_nonstatic_field_offset +
3282 (nonstatic_oop_count * heapOopSize);
3283 if ( nonstatic_double_count > 0 ) {
3284 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3285 }
3286 next_nonstatic_word_offset = next_nonstatic_double_offset +
3287 (nonstatic_double_count * BytesPerLong);
3288 next_nonstatic_short_offset = next_nonstatic_word_offset +
3289 (nonstatic_word_count * BytesPerInt);
3290 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3291 (nonstatic_short_count * BytesPerShort);
3292 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3293 nonstatic_byte_count ), heapOopSize );
3294 orig_nonstatic_field_size = nonstatic_field_size +
3295 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3296 }
3297 #endif
3298 bool compact_fields = CompactFields;
3299 int allocation_style = FieldsAllocationStyle;
3300 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3301 assert(false, "0 <= FieldsAllocationStyle <= 2");
3302 allocation_style = 1; // Optimistic
3303 }
3304
3305 // The next classes have predefined hard-coded fields offsets
3306 // (see in JavaClasses::compute_hard_coded_offsets()).
3307 // Use default fields allocation order for them.
3308 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3309 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3310 class_name == vmSymbols::java_lang_Class() ||
3311 class_name == vmSymbols::java_lang_ClassLoader() ||
3312 class_name == vmSymbols::java_lang_ref_Reference() ||
3313 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3314 class_name == vmSymbols::java_lang_StackTraceElement() ||
3315 class_name == vmSymbols::java_lang_String() ||
3316 class_name == vmSymbols::java_lang_Throwable() ||
3317 class_name == vmSymbols::java_lang_Boolean() ||
3318 class_name == vmSymbols::java_lang_Character() ||
3319 class_name == vmSymbols::java_lang_Float() ||
3320 class_name == vmSymbols::java_lang_Double() ||
3321 class_name == vmSymbols::java_lang_Byte() ||
3322 class_name == vmSymbols::java_lang_Short() ||
3323 class_name == vmSymbols::java_lang_Integer() ||
3324 class_name == vmSymbols::java_lang_Long())) {
3325 allocation_style = 0; // Allocate oops first
3326 compact_fields = false; // Don't compact fields
3327 }
3328
3329 if( allocation_style == 0 ) {
3330 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3331 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3332 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3333 (nonstatic_oop_count * heapOopSize);
3334 } else if( allocation_style == 1 ) {
3335 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3336 next_nonstatic_double_offset = next_nonstatic_field_offset;
3337 } else if( allocation_style == 2 ) {
3338 // Fields allocation: oops fields in super and sub classes are together.
3339 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3340 super_klass->nonstatic_oop_map_size() > 0 ) {
3341 int map_size = super_klass->nonstatic_oop_map_size();
3342 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3343 OopMapBlock* last_map = first_map + map_size - 1;
3344 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3345 if (next_offset == next_nonstatic_field_offset) {
3346 allocation_style = 0; // allocate oops first
3347 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3348 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3349 (nonstatic_oop_count * heapOopSize);
3350 }
3351 }
3352 if( allocation_style == 2 ) {
3353 allocation_style = 1; // allocate oops last
3354 next_nonstatic_double_offset = next_nonstatic_field_offset;
3355 }
3356 } else {
3357 ShouldNotReachHere();
3358 }
3359
3360 int nonstatic_oop_space_count = 0;
3361 int nonstatic_word_space_count = 0;
3362 int nonstatic_short_space_count = 0;
3363 int nonstatic_byte_space_count = 0;
3364 int nonstatic_oop_space_offset;
3365 int nonstatic_word_space_offset;
3366 int nonstatic_short_space_offset;
3367 int nonstatic_byte_space_offset;
3368
3369 if( nonstatic_double_count > 0 ) {
3370 int offset = next_nonstatic_double_offset;
3371 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3372 if( compact_fields && offset != next_nonstatic_double_offset ) {
3373 // Allocate available fields into the gap before double field.
3374 int length = next_nonstatic_double_offset - offset;
3375 assert(length == BytesPerInt, "");
3376 nonstatic_word_space_offset = offset;
3377 if( nonstatic_word_count > 0 ) {
3378 nonstatic_word_count -= 1;
3379 nonstatic_word_space_count = 1; // Only one will fit
3380 length -= BytesPerInt;
3381 offset += BytesPerInt;
3382 }
3383 nonstatic_short_space_offset = offset;
3384 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3385 nonstatic_short_count -= 1;
3386 nonstatic_short_space_count += 1;
3387 length -= BytesPerShort;
3388 offset += BytesPerShort;
3389 }
3390 nonstatic_byte_space_offset = offset;
3391 while( length > 0 && nonstatic_byte_count > 0 ) {
3392 nonstatic_byte_count -= 1;
3393 nonstatic_byte_space_count += 1;
3394 length -= 1;
3395 }
3396 // Allocate oop field in the gap if there are no other fields for that.
3397 nonstatic_oop_space_offset = offset;
3398 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3399 allocation_style != 0 ) { // when oop fields not first
3400 nonstatic_oop_count -= 1;
3401 nonstatic_oop_space_count = 1; // Only one will fit
3402 length -= heapOopSize;
3403 offset += heapOopSize;
3404 }
3405 }
3406 }
3407
3408 next_nonstatic_word_offset = next_nonstatic_double_offset +
3409 (nonstatic_double_count * BytesPerLong);
3410 next_nonstatic_short_offset = next_nonstatic_word_offset +
3411 (nonstatic_word_count * BytesPerInt);
3412 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3413 (nonstatic_short_count * BytesPerShort);
3414
3415 int notaligned_offset;
3416 if( allocation_style == 0 ) {
3417 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3418 } else { // allocation_style == 1
3419 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3420 if( nonstatic_oop_count > 0 ) {
3421 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3422 }
3423 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3424 }
3425 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3426 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3427 - first_nonstatic_field_offset)/heapOopSize);
3428
3429 // Iterate over fields again and compute correct offsets.
3430 // The field allocation type was temporarily stored in the offset slot.
3431 // oop fields are located before non-oop fields (static and non-static).
3432 int len = fields->length();
3433 for (int i = 0; i < len; i += instanceKlass::next_offset) {
3434 int real_offset;
3435 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
3436 switch (atype) {
3437 case STATIC_OOP:
3438 real_offset = next_static_oop_offset;
3439 next_static_oop_offset += heapOopSize;
3440 break;
3441 case STATIC_BYTE:
3442 real_offset = next_static_byte_offset;
3443 next_static_byte_offset += 1;
3444 break;
3445 case STATIC_SHORT:
3446 real_offset = next_static_short_offset;
3447 next_static_short_offset += BytesPerShort;
3448 break;
3449 case STATIC_WORD:
3450 real_offset = next_static_word_offset;
3451 next_static_word_offset += BytesPerInt;
3452 break;
3453 case STATIC_ALIGNED_DOUBLE:
3454 case STATIC_DOUBLE:
3455 real_offset = next_static_double_offset;
3456 next_static_double_offset += BytesPerLong;
3457 break;
3458 case NONSTATIC_OOP:
3459 if( nonstatic_oop_space_count > 0 ) {
3460 real_offset = nonstatic_oop_space_offset;
3461 nonstatic_oop_space_offset += heapOopSize;
3462 nonstatic_oop_space_count -= 1;
3463 } else {
3464 real_offset = next_nonstatic_oop_offset;
3465 next_nonstatic_oop_offset += heapOopSize;
3466 }
3467 // Update oop maps
3468 if( nonstatic_oop_map_count > 0 &&
3469 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3470 real_offset -
3471 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3472 heapOopSize ) {
3473 // Extend current oop map
3474 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3475 } else {
3476 // Create new oop map
3477 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3478 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3479 nonstatic_oop_map_count += 1;
3480 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3481 first_nonstatic_oop_offset = real_offset;
3482 }
3483 }
3484 break;
3485 case NONSTATIC_BYTE:
3486 if( nonstatic_byte_space_count > 0 ) {
3487 real_offset = nonstatic_byte_space_offset;
3488 nonstatic_byte_space_offset += 1;
3489 nonstatic_byte_space_count -= 1;
3490 } else {
3491 real_offset = next_nonstatic_byte_offset;
3492 next_nonstatic_byte_offset += 1;
3493 }
3494 break;
3495 case NONSTATIC_SHORT:
3496 if( nonstatic_short_space_count > 0 ) {
3497 real_offset = nonstatic_short_space_offset;
3498 nonstatic_short_space_offset += BytesPerShort;
3499 nonstatic_short_space_count -= 1;
3500 } else {
3501 real_offset = next_nonstatic_short_offset;
3502 next_nonstatic_short_offset += BytesPerShort;
3503 }
3504 break;
3505 case NONSTATIC_WORD:
3506 if( nonstatic_word_space_count > 0 ) {
3507 real_offset = nonstatic_word_space_offset;
3508 nonstatic_word_space_offset += BytesPerInt;
3509 nonstatic_word_space_count -= 1;
3510 } else {
3511 real_offset = next_nonstatic_word_offset;
3512 next_nonstatic_word_offset += BytesPerInt;
3513 }
3514 break;
3515 case NONSTATIC_ALIGNED_DOUBLE:
3516 case NONSTATIC_DOUBLE:
3517 real_offset = next_nonstatic_double_offset;
3518 next_nonstatic_double_offset += BytesPerLong;
3519 break;
3520 default:
3521 ShouldNotReachHere();
3522 }
3523 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
3524 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
3525 }
3526
3527 // Size of instances
3528 int instance_size;
3529
3530 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3531 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3532
3533 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3534
3535 // Number of non-static oop map blocks allocated at end of klass.
3536 const unsigned int total_oop_map_count =
3537 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3538 first_nonstatic_oop_offset);
3539
3540 // Compute reference type
3541 ReferenceType rt;
3542 if (super_klass() == NULL) {
3543 rt = REF_NONE;
3544 } else {
3545 rt = super_klass->reference_type();
3546 }
3547
3548 // We can now create the basic klassOop for this klass
3549 klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size,
3550 static_field_size,
3551 total_oop_map_count,
3552 rt, CHECK_(nullHandle));
3553 instanceKlassHandle this_klass (THREAD, ik);
3554
3555 assert(this_klass->static_field_size() == static_field_size, "sanity");
3556 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3557 "sanity");
3558
3559 // Fill in information already parsed
3560 this_klass->set_access_flags(access_flags);
3561 this_klass->set_should_verify_class(verify);
3562 jint lh = Klass::instance_layout_helper(instance_size, false);
3563 this_klass->set_layout_helper(lh);
3564 assert(this_klass->oop_is_instance(), "layout is correct");
3565 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3566 // Not yet: supers are done below to support the new subtype-checking fields
3567 //this_klass->set_super(super_klass());
3568 this_klass->set_class_loader(class_loader());
3569 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3570 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3571 this_klass->set_static_oop_field_size(fac.static_oop_count);
3572 cp->set_pool_holder(this_klass());
3573 error_handler.set_in_error(false); // turn off error handler for cp
3574 this_klass->set_constants(cp());
3575 this_klass->set_local_interfaces(local_interfaces());
3576 this_klass->set_fields(fields());
3577 this_klass->set_methods(methods());
3578 if (has_final_method) {
3579 this_klass->set_has_final_method();
3580 }
3581 this_klass->set_method_ordering(method_ordering());
3582 // The instanceKlass::_methods_jmethod_ids cache and the
3583 // instanceKlass::_methods_cached_itable_indices cache are
3584 // both managed on the assumption that the initial cache
3585 // size is equal to the number of methods in the class. If
3586 // that changes, then instanceKlass::idnum_can_increment()
3587 // has to be changed accordingly.
3588 this_klass->set_initial_method_idnum(methods->length());
3589 this_klass->set_name(cp->klass_name_at(this_class_index));
3590 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself
3591 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3592 this_klass->set_protection_domain(protection_domain());
3593 this_klass->set_fields_annotations(fields_annotations());
3594 this_klass->set_methods_annotations(methods_annotations());
3595 this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3596 this_klass->set_methods_default_annotations(methods_default_annotations());
3597
3598 this_klass->set_minor_version(minor_version);
3599 this_klass->set_major_version(major_version);
3600
3601 // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3602 // (We used to do this lazily, but now we query it in Rewriter,
3603 // which is eagerly done for every method, so we might as well do it now,
3604 // when everything is fresh in memory.)
3605 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3606 for (int j = 0; j < methods->length(); j++) {
3607 ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3608 }
3609 }
3610
3611 if (cached_class_file_bytes != NULL) {
3612 // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3613 this_klass->set_cached_class_file(cached_class_file_bytes,
3614 cached_class_file_length);
3615 }
3616
3617 // Miranda methods
3618 if ((num_miranda_methods > 0) ||
3619 // if this class introduced new miranda methods or
3620 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3621 // super class exists and this class inherited miranda methods
3622 ) {
3623 this_klass->set_has_miranda_methods(); // then set a flag
3624 }
3625
3626 // Additional attributes
3627 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
3628
3629 // Make sure this is the end of class file stream
3630 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3631
3632 // Initialize static fields
3633 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle));
3634
3635 // VerifyOops believes that once this has been set, the object is completely loaded.
3636 // Compute transitive closure of interfaces this class implements
3637 this_klass->set_transitive_interfaces(transitive_interfaces());
3638
3639 // Fill in information needed to compute superclasses.
3640 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3641
3642 // Initialize itable offset tables
3643 klassItable::setup_itable_offset_table(this_klass);
3644
3645 // Do final class setup
3646 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3647
3648 set_precomputed_flags(this_klass);
3649
3650 // reinitialize modifiers, using the InnerClasses attribute
3651 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3652 this_klass->set_modifier_flags(computed_modifiers);
3653
3654 // check if this class can access its super class
3655 check_super_class_access(this_klass, CHECK_(nullHandle));
3656
3657 // check if this class can access its superinterfaces
3658 check_super_interface_access(this_klass, CHECK_(nullHandle));
3659
3660 // check if this class overrides any final method
3661 check_final_method_override(this_klass, CHECK_(nullHandle));
3662
3663 // check that if this class is an interface then it doesn't have static methods
3664 if (this_klass->is_interface()) {
3665 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3666 }
3667
3668 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3669 false /* not shared class */);
3670
3671 if (TraceClassLoading) {
3672 // print in a single call to reduce interleaving of output
3673 if (cfs->source() != NULL) {
3674 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3675 cfs->source());
3676 } else if (class_loader.is_null()) {
3677 if (THREAD->is_Java_thread()) {
3678 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3679 tty->print("[Loaded %s by instance of %s]\n",
3680 this_klass->external_name(),
3681 instanceKlass::cast(caller)->external_name());
3682 } else {
3683 tty->print("[Loaded %s]\n", this_klass->external_name());
3684 }
3685 } else {
3686 ResourceMark rm;
3687 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3688 instanceKlass::cast(class_loader->klass())->external_name());
3689 }
3690 }
3691
3692 if (TraceClassResolution) {
3693 // print out the superclass.
3694 const char * from = Klass::cast(this_klass())->external_name();
3695 if (this_klass->java_super() != NULL) {
3696 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3697 }
3698 // print out each of the interface classes referred to by this class.
3699 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3700 if (!local_interfaces.is_null()) {
3701 int length = local_interfaces->length();
3702 for (int i = 0; i < length; i++) {
3703 klassOop k = klassOop(local_interfaces->obj_at(i));
3704 instanceKlass* to_class = instanceKlass::cast(k);
3705 const char * to = to_class->external_name();
3706 tty->print("RESOLVE %s %s (interface)\n", from, to);
3707 }
3708 }
3709 }
3710
3711 #ifndef PRODUCT
3712 if( PrintCompactFieldsSavings ) {
3713 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3714 tty->print("[Saved %d of %d bytes in %s]\n",
3715 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3716 orig_nonstatic_field_size*heapOopSize,
3717 this_klass->external_name());
3718 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3719 tty->print("[Wasted %d over %d bytes in %s]\n",
3720 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3721 orig_nonstatic_field_size*heapOopSize,
3722 this_klass->external_name());
3723 }
3724 }
3725 #endif
3726
3727 // preserve result across HandleMark
3728 preserve_this_klass = this_klass();
3729 }
3730
3731 // Create new handle outside HandleMark
3732 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3733 debug_only(this_klass->as_klassOop()->verify();)
3734
3735 return this_klass;
3736 }
3737
3738
3739 unsigned int
3740 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3741 unsigned int nonstatic_oop_map_count,
3742 int first_nonstatic_oop_offset) {
3743 unsigned int map_count =
3744 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3745 if (nonstatic_oop_map_count > 0) {
3746 // We have oops to add to map
3747 if (map_count == 0) {
3748 map_count = nonstatic_oop_map_count;
3749 } else {
3750 // Check whether we should add a new map block or whether the last one can
3751 // be extended
3752 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3753 OopMapBlock* const last_map = first_map + map_count - 1;
3754
3755 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3756 if (next_offset == first_nonstatic_oop_offset) {
3757 // There is no gap bettwen superklass's last oop field and first
3758 // local oop field, merge maps.
3759 nonstatic_oop_map_count -= 1;
3760 } else {
3761 // Superklass didn't end with a oop field, add extra maps
3762 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3763 }
3764 map_count += nonstatic_oop_map_count;
3765 }
3766 }
3767 return map_count;
3768 }
3769
3770
3771 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3772 unsigned int nonstatic_oop_map_count,
3773 int* nonstatic_oop_offsets,
3774 unsigned int* nonstatic_oop_counts) {
3775 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3776 const instanceKlass* const super = k->superklass();
3777 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3778 if (super_count > 0) {
3779 // Copy maps from superklass
3780 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3781 for (unsigned int i = 0; i < super_count; ++i) {
3782 *this_oop_map++ = *super_oop_map++;
3783 }
3784 }
3785
3786 if (nonstatic_oop_map_count > 0) {
3787 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3788 // The counts differ because there is no gap between superklass's last oop
3789 // field and the first local oop field. Extend the last oop map copied
3790 // from the superklass instead of creating new one.
3791 nonstatic_oop_map_count--;
3792 nonstatic_oop_offsets++;
3793 this_oop_map--;
3794 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3795 this_oop_map++;
3796 }
3797
3798 // Add new map blocks, fill them
3799 while (nonstatic_oop_map_count-- > 0) {
3800 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3801 this_oop_map->set_count(*nonstatic_oop_counts++);
3802 this_oop_map++;
3803 }
3804 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3805 this_oop_map, "sanity");
3806 }
3807 }
3808
3809
3810 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3811 klassOop super = k->super();
3812
3813 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3814 // in which case we don't have to register objects as finalizable
3815 if (!_has_empty_finalizer) {
3816 if (_has_finalizer ||
3817 (super != NULL && super->klass_part()->has_finalizer())) {
3818 k->set_has_finalizer();
3819 }
3820 }
3821
3822 #ifdef ASSERT
3823 bool f = false;
3824 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3825 vmSymbols::void_method_signature());
3826 if (m != NULL && !m->is_empty_method()) {
3827 f = true;
3828 }
3829 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3830 #endif
3831
3832 // Check if this klass supports the java.lang.Cloneable interface
3833 if (SystemDictionary::Cloneable_klass_loaded()) {
3834 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3835 k->set_is_cloneable();
3836 }
3837 }
3838
3839 // Check if this klass has a vanilla default constructor
3840 if (super == NULL) {
3841 // java.lang.Object has empty default constructor
3842 k->set_has_vanilla_constructor();
3843 } else {
3844 if (Klass::cast(super)->has_vanilla_constructor() &&
3845 _has_vanilla_constructor) {
3846 k->set_has_vanilla_constructor();
3847 }
3848 #ifdef ASSERT
3849 bool v = false;
3850 if (Klass::cast(super)->has_vanilla_constructor()) {
3851 methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3852 ), vmSymbols::void_method_signature());
3853 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3854 v = true;
3855 }
3856 }
3857 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3858 #endif
3859 }
3860
3861 // If it cannot be fast-path allocated, set a bit in the layout helper.
3862 // See documentation of instanceKlass::can_be_fastpath_allocated().
3863 assert(k->size_helper() > 0, "layout_helper is initialized");
3864 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3865 || k->is_abstract() || k->is_interface()
3866 || (k->name() == vmSymbols::java_lang_Class()
3867 && k->class_loader() == NULL)
3868 || k->size_helper() >= FastAllocateSizeLimit) {
3869 // Forbid fast-path allocation.
3870 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3871 k->set_layout_helper(lh);
3872 }
3873 }
3874
3875
3876 // utility method for appending and array with check for duplicates
3877
3878 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3879 // iterate over new interfaces
3880 for (int i = 0; i < ifs->length(); i++) {
3881 oop e = ifs->obj_at(i);
3882 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3883 // check for duplicates
3884 bool duplicate = false;
3885 for (int j = 0; j < index; j++) {
3886 if (result->obj_at(j) == e) {
3887 duplicate = true;
3888 break;
3889 }
3890 }
3891 // add new interface
3892 if (!duplicate) {
3893 result->obj_at_put(index++, e);
3894 }
3895 }
3896 }
3897
3898 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3899 // Compute maximum size for transitive interfaces
3900 int max_transitive_size = 0;
3901 int super_size = 0;
3902 // Add superclass transitive interfaces size
3903 if (super.not_null()) {
3904 super_size = super->transitive_interfaces()->length();
3905 max_transitive_size += super_size;
3906 }
3907 // Add local interfaces' super interfaces
3908 int local_size = local_ifs->length();
3909 for (int i = 0; i < local_size; i++) {
3910 klassOop l = klassOop(local_ifs->obj_at(i));
3911 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3912 }
3913 // Finally add local interfaces
3914 max_transitive_size += local_size;
3915 // Construct array
3916 objArrayHandle result;
3917 if (max_transitive_size == 0) {
3918 // no interfaces, use canonicalized array
3919 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3920 } else if (max_transitive_size == super_size) {
3921 // no new local interfaces added, share superklass' transitive interface array
3922 result = objArrayHandle(THREAD, super->transitive_interfaces());
3923 } else if (max_transitive_size == local_size) {
3924 // only local interfaces added, share local interface array
3925 result = local_ifs;
3926 } else {
3927 objArrayHandle nullHandle;
3928 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3929 result = objArrayHandle(THREAD, new_objarray);
3930 int index = 0;
3931 // Copy down from superclass
3932 if (super.not_null()) {
3933 append_interfaces(result, index, super->transitive_interfaces());
3934 }
3935 // Copy down from local interfaces' superinterfaces
3936 for (int i = 0; i < local_ifs->length(); i++) {
3937 klassOop l = klassOop(local_ifs->obj_at(i));
3938 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3939 }
3940 // Finally add local interfaces
3941 append_interfaces(result, index, local_ifs());
3942
3943 // Check if duplicates were removed
3944 if (index != max_transitive_size) {
3945 assert(index < max_transitive_size, "just checking");
3946 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3947 for (int i = 0; i < index; i++) {
3948 oop e = result->obj_at(i);
3949 assert(e != NULL, "just checking");
3950 new_result->obj_at_put(i, e);
3951 }
3952 result = objArrayHandle(THREAD, new_result);
3953 }
3954 }
3955 return result;
3956 }
3957
3958
3959 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3960 klassOop super = this_klass->super();
3961 if ((super != NULL) &&
3962 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3963 ResourceMark rm(THREAD);
3964 Exceptions::fthrow(
3965 THREAD_AND_LOCATION,
3966 vmSymbols::java_lang_IllegalAccessError(),
3967 "class %s cannot access its superclass %s",
3968 this_klass->external_name(),
3969 instanceKlass::cast(super)->external_name()
3970 );
3971 return;
3972 }
3973 }
3974
3975
3976 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
3977 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
3978 int lng = local_interfaces->length();
3979 for (int i = lng - 1; i >= 0; i--) {
3980 klassOop k = klassOop(local_interfaces->obj_at(i));
3981 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
3982 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
3983 ResourceMark rm(THREAD);
3984 Exceptions::fthrow(
3985 THREAD_AND_LOCATION,
3986 vmSymbols::java_lang_IllegalAccessError(),
3987 "class %s cannot access its superinterface %s",
3988 this_klass->external_name(),
3989 instanceKlass::cast(k)->external_name()
3990 );
3991 return;
3992 }
3993 }
3994 }
3995
3996
3997 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
3998 objArrayHandle methods (THREAD, this_klass->methods());
3999 int num_methods = methods->length();
4000
4001 // go thru each method and check if it overrides a final method
4002 for (int index = 0; index < num_methods; index++) {
4003 methodOop m = (methodOop)methods->obj_at(index);
4004
4005 // skip private, static and <init> methods
4006 if ((!m->is_private()) &&
4007 (!m->is_static()) &&
4008 (m->name() != vmSymbols::object_initializer_name())) {
4009
4010 Symbol* name = m->name();
4011 Symbol* signature = m->signature();
4012 klassOop k = this_klass->super();
4013 methodOop super_m = NULL;
4014 while (k != NULL) {
4015 // skip supers that don't have final methods.
4016 if (k->klass_part()->has_final_method()) {
4017 // lookup a matching method in the super class hierarchy
4018 super_m = instanceKlass::cast(k)->lookup_method(name, signature);
4019 if (super_m == NULL) {
4020 break; // didn't find any match; get out
4021 }
4022
4023 if (super_m->is_final() &&
4024 // matching method in super is final
4025 (Reflection::verify_field_access(this_klass->as_klassOop(),
4026 super_m->method_holder(),
4027 super_m->method_holder(),
4028 super_m->access_flags(), false))
4029 // this class can access super final method and therefore override
4030 ) {
4031 ResourceMark rm(THREAD);
4032 Exceptions::fthrow(
4033 THREAD_AND_LOCATION,
4034 vmSymbols::java_lang_VerifyError(),
4035 "class %s overrides final method %s.%s",
4036 this_klass->external_name(),
4037 name->as_C_string(),
4038 signature->as_C_string()
4039 );
4040 return;
4041 }
4042
4043 // continue to look from super_m's holder's super.
4044 k = instanceKlass::cast(super_m->method_holder())->super();
4045 continue;
4046 }
4047
4048 k = k->klass_part()->super();
4049 }
4050 }
4051 }
4052 }
4053
4054
4055 // assumes that this_klass is an interface
4056 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4057 assert(this_klass->is_interface(), "not an interface");
4058 objArrayHandle methods (THREAD, this_klass->methods());
4059 int num_methods = methods->length();
4060
4061 for (int index = 0; index < num_methods; index++) {
4062 methodOop m = (methodOop)methods->obj_at(index);
4063 // if m is static and not the init method, throw a verify error
4064 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4065 ResourceMark rm(THREAD);
4066 Exceptions::fthrow(
4067 THREAD_AND_LOCATION,
4068 vmSymbols::java_lang_VerifyError(),
4069 "Illegal static method %s in interface %s",
4070 m->name()->as_C_string(),
4071 this_klass->external_name()
4072 );
4073 return;
4074 }
4075 }
4076 }
4077
4078 // utility methods for format checking
4079
4080 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4081 if (!_need_verify) { return; }
4082
4083 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4084 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4085 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4086 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4087 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4088 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4089 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4090
4091 if ((is_abstract && is_final) ||
4092 (is_interface && !is_abstract) ||
4093 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4094 (!is_interface && major_gte_15 && is_annotation)) {
4095 ResourceMark rm(THREAD);
4096 Exceptions::fthrow(
4097 THREAD_AND_LOCATION,
4098 vmSymbols::java_lang_ClassFormatError(),
4099 "Illegal class modifiers in class %s: 0x%X",
4100 _class_name->as_C_string(), flags
4101 );
4102 return;
4103 }
4104 }
4105
4106 bool ClassFileParser::has_illegal_visibility(jint flags) {
4107 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4108 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4109 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4110
4111 return ((is_public && is_protected) ||
4112 (is_public && is_private) ||
4113 (is_protected && is_private));
4114 }
4115
4116 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4117 u2 max_version =
4118 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4119 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4120 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4121 (major <= max_version) &&
4122 ((major != max_version) ||
4123 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4124 }
4125
4126 void ClassFileParser::verify_legal_field_modifiers(
4127 jint flags, bool is_interface, TRAPS) {
4128 if (!_need_verify) { return; }
4129
4130 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4131 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4132 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4133 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4134 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4135 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4136 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4137 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4138 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4139
4140 bool is_illegal = false;
4141
4142 if (is_interface) {
4143 if (!is_public || !is_static || !is_final || is_private ||
4144 is_protected || is_volatile || is_transient ||
4145 (major_gte_15 && is_enum)) {
4146 is_illegal = true;
4147 }
4148 } else { // not interface
4149 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4150 is_illegal = true;
4151 }
4152 }
4153
4154 if (is_illegal) {
4155 ResourceMark rm(THREAD);
4156 Exceptions::fthrow(
4157 THREAD_AND_LOCATION,
4158 vmSymbols::java_lang_ClassFormatError(),
4159 "Illegal field modifiers in class %s: 0x%X",
4160 _class_name->as_C_string(), flags);
4161 return;
4162 }
4163 }
4164
4165 void ClassFileParser::verify_legal_method_modifiers(
4166 jint flags, bool is_interface, Symbol* name, TRAPS) {
4167 if (!_need_verify) { return; }
4168
4169 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4170 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4171 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4172 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4173 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4174 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4175 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4176 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4177 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4178 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4179 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4180
4181 bool is_illegal = false;
4182
4183 if (is_interface) {
4184 if (!is_abstract || !is_public || is_static || is_final ||
4185 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4186 is_illegal = true;
4187 }
4188 } else { // not interface
4189 if (is_initializer) {
4190 if (is_static || is_final || is_synchronized || is_native ||
4191 is_abstract || (major_gte_15 && is_bridge)) {
4192 is_illegal = true;
4193 }
4194 } else { // not initializer
4195 if (is_abstract) {
4196 if ((is_final || is_native || is_private || is_static ||
4197 (major_gte_15 && (is_synchronized || is_strict)))) {
4198 is_illegal = true;
4199 }
4200 }
4201 if (has_illegal_visibility(flags)) {
4202 is_illegal = true;
4203 }
4204 }
4205 }
4206
4207 if (is_illegal) {
4208 ResourceMark rm(THREAD);
4209 Exceptions::fthrow(
4210 THREAD_AND_LOCATION,
4211 vmSymbols::java_lang_ClassFormatError(),
4212 "Method %s in class %s has illegal modifiers: 0x%X",
4213 name->as_C_string(), _class_name->as_C_string(), flags);
4214 return;
4215 }
4216 }
4217
4218 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4219 assert(_need_verify, "only called when _need_verify is true");
4220 int i = 0;
4221 int count = length >> 2;
4222 for (int k=0; k<count; k++) {
4223 unsigned char b0 = buffer[i];
4224 unsigned char b1 = buffer[i+1];
4225 unsigned char b2 = buffer[i+2];
4226 unsigned char b3 = buffer[i+3];
4227 // For an unsigned char v,
4228 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4229 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4230 unsigned char res = b0 | b0 - 1 |
4231 b1 | b1 - 1 |
4232 b2 | b2 - 1 |
4233 b3 | b3 - 1;
4234 if (res >= 128) break;
4235 i += 4;
4236 }
4237 for(; i < length; i++) {
4238 unsigned short c;
4239 // no embedded zeros
4240 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4241 if(buffer[i] < 128) {
4242 continue;
4243 }
4244 if ((i + 5) < length) { // see if it's legal supplementary character
4245 if (UTF8::is_supplementary_character(&buffer[i])) {
4246 c = UTF8::get_supplementary_character(&buffer[i]);
4247 i += 5;
4248 continue;
4249 }
4250 }
4251 switch (buffer[i] >> 4) {
4252 default: break;
4253 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4254 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4255 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4256 c = (buffer[i] & 0x1F) << 6;
4257 i++;
4258 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4259 c += buffer[i] & 0x3F;
4260 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4261 // for classes with major > 47, c must a null or a character in its shortest form
4262 break;
4263 }
4264 }
4265 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4266 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4267 c = (buffer[i] & 0xF) << 12;
4268 i += 2;
4269 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4270 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4271 if (_major_version <= 47 || c >= 0x800) {
4272 // for classes with major > 47, c must be in its shortest form
4273 break;
4274 }
4275 }
4276 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4277 } // end of switch
4278 } // end of for
4279 }
4280
4281 // Checks if name is a legal class name.
4282 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4283 if (!_need_verify || _relax_verify) { return; }
4284
4285 char buf[fixed_buffer_size];
4286 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4287 unsigned int length = name->utf8_length();
4288 bool legal = false;
4289
4290 if (length > 0) {
4291 char* p;
4292 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4293 p = skip_over_field_signature(bytes, false, length, CHECK);
4294 legal = (p != NULL) && ((p - bytes) == (int)length);
4295 } else if (_major_version < JAVA_1_5_VERSION) {
4296 if (bytes[0] != '<') {
4297 p = skip_over_field_name(bytes, true, length);
4298 legal = (p != NULL) && ((p - bytes) == (int)length);
4299 }
4300 } else {
4301 // 4900761: relax the constraints based on JSR202 spec
4302 // Class names may be drawn from the entire Unicode character set.
4303 // Identifiers between '/' must be unqualified names.
4304 // The utf8 string has been verified when parsing cpool entries.
4305 legal = verify_unqualified_name(bytes, length, LegalClass);
4306 }
4307 }
4308 if (!legal) {
4309 ResourceMark rm(THREAD);
4310 Exceptions::fthrow(
4311 THREAD_AND_LOCATION,
4312 vmSymbols::java_lang_ClassFormatError(),
4313 "Illegal class name \"%s\" in class file %s", bytes,
4314 _class_name->as_C_string()
4315 );
4316 return;
4317 }
4318 }
4319
4320 // Checks if name is a legal field name.
4321 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4322 if (!_need_verify || _relax_verify) { return; }
4323
4324 char buf[fixed_buffer_size];
4325 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4326 unsigned int length = name->utf8_length();
4327 bool legal = false;
4328
4329 if (length > 0) {
4330 if (_major_version < JAVA_1_5_VERSION) {
4331 if (bytes[0] != '<') {
4332 char* p = skip_over_field_name(bytes, false, length);
4333 legal = (p != NULL) && ((p - bytes) == (int)length);
4334 }
4335 } else {
4336 // 4881221: relax the constraints based on JSR202 spec
4337 legal = verify_unqualified_name(bytes, length, LegalField);
4338 }
4339 }
4340
4341 if (!legal) {
4342 ResourceMark rm(THREAD);
4343 Exceptions::fthrow(
4344 THREAD_AND_LOCATION,
4345 vmSymbols::java_lang_ClassFormatError(),
4346 "Illegal field name \"%s\" in class %s", bytes,
4347 _class_name->as_C_string()
4348 );
4349 return;
4350 }
4351 }
4352
4353 // Checks if name is a legal method name.
4354 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4355 if (!_need_verify || _relax_verify) { return; }
4356
4357 assert(name != NULL, "method name is null");
4358 char buf[fixed_buffer_size];
4359 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4360 unsigned int length = name->utf8_length();
4361 bool legal = false;
4362
4363 if (length > 0) {
4364 if (bytes[0] == '<') {
4365 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4366 legal = true;
4367 }
4368 } else if (_major_version < JAVA_1_5_VERSION) {
4369 char* p;
4370 p = skip_over_field_name(bytes, false, length);
4371 legal = (p != NULL) && ((p - bytes) == (int)length);
4372 } else {
4373 // 4881221: relax the constraints based on JSR202 spec
4374 legal = verify_unqualified_name(bytes, length, LegalMethod);
4375 }
4376 }
4377
4378 if (!legal) {
4379 ResourceMark rm(THREAD);
4380 Exceptions::fthrow(
4381 THREAD_AND_LOCATION,
4382 vmSymbols::java_lang_ClassFormatError(),
4383 "Illegal method name \"%s\" in class %s", bytes,
4384 _class_name->as_C_string()
4385 );
4386 return;
4387 }
4388 }
4389
4390
4391 // Checks if signature is a legal field signature.
4392 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4393 if (!_need_verify) { return; }
4394
4395 char buf[fixed_buffer_size];
4396 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4397 unsigned int length = signature->utf8_length();
4398 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4399
4400 if (p == NULL || (p - bytes) != (int)length) {
4401 throwIllegalSignature("Field", name, signature, CHECK);
4402 }
4403 }
4404
4405 // Checks if signature is a legal method signature.
4406 // Returns number of parameters
4407 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4408 if (!_need_verify) {
4409 // make sure caller's args_size will be less than 0 even for non-static
4410 // method so it will be recomputed in compute_size_of_parameters().
4411 return -2;
4412 }
4413
4414 unsigned int args_size = 0;
4415 char buf[fixed_buffer_size];
4416 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4417 unsigned int length = signature->utf8_length();
4418 char* nextp;
4419
4420 // The first character must be a '('
4421 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4422 length--;
4423 // Skip over legal field signatures
4424 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4425 while ((length > 0) && (nextp != NULL)) {
4426 args_size++;
4427 if (p[0] == 'J' || p[0] == 'D') {
4428 args_size++;
4429 }
4430 length -= nextp - p;
4431 p = nextp;
4432 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4433 }
4434 // The first non-signature thing better be a ')'
4435 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4436 length--;
4437 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4438 // All internal methods must return void
4439 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4440 return args_size;
4441 }
4442 } else {
4443 // Now we better just have a return value
4444 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4445 if (nextp && ((int)length == (nextp - p))) {
4446 return args_size;
4447 }
4448 }
4449 }
4450 }
4451 // Report error
4452 throwIllegalSignature("Method", name, signature, CHECK_0);
4453 return 0;
4454 }
4455
4456
4457 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4458 // Method names also may not contain the characters '<' or '>', unless <init>
4459 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4460 // method. Because these names have been checked as special cases before
4461 // calling this method in verify_legal_method_name.
4462 bool ClassFileParser::verify_unqualified_name(
4463 char* name, unsigned int length, int type) {
4464 jchar ch;
4465
4466 for (char* p = name; p != name + length; ) {
4467 ch = *p;
4468 if (ch < 128) {
4469 p++;
4470 if (ch == '.' || ch == ';' || ch == '[' ) {
4471 return false; // do not permit '.', ';', or '['
4472 }
4473 if (type != LegalClass && ch == '/') {
4474 return false; // do not permit '/' unless it's class name
4475 }
4476 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4477 return false; // do not permit '<' or '>' in method names
4478 }
4479 } else {
4480 char* tmp_p = UTF8::next(p, &ch);
4481 p = tmp_p;
4482 }
4483 }
4484 return true;
4485 }
4486
4487
4488 // Take pointer to a string. Skip over the longest part of the string that could
4489 // be taken as a fieldname. Allow '/' if slash_ok is true.
4490 // Return a pointer to just past the fieldname.
4491 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4492 // being true, we saw consecutive slashes (meaning we were looking for a
4493 // qualified path but found something that was badly-formed).
4494 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4495 char* p;
4496 jchar ch;
4497 jboolean last_is_slash = false;
4498 jboolean not_first_ch = false;
4499
4500 for (p = name; p != name + length; not_first_ch = true) {
4501 char* old_p = p;
4502 ch = *p;
4503 if (ch < 128) {
4504 p++;
4505 // quick check for ascii
4506 if ((ch >= 'a' && ch <= 'z') ||
4507 (ch >= 'A' && ch <= 'Z') ||
4508 (ch == '_' || ch == '$') ||
4509 (not_first_ch && ch >= '0' && ch <= '9')) {
4510 last_is_slash = false;
4511 continue;
4512 }
4513 if (slash_ok && ch == '/') {
4514 if (last_is_slash) {
4515 return NULL; // Don't permit consecutive slashes
4516 }
4517 last_is_slash = true;
4518 continue;
4519 }
4520 } else {
4521 jint unicode_ch;
4522 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4523 p = tmp_p;
4524 last_is_slash = false;
4525 // Check if ch is Java identifier start or is Java identifier part
4526 // 4672820: call java.lang.Character methods directly without generating separate tables.
4527 EXCEPTION_MARK;
4528 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4529
4530 // return value
4531 JavaValue result(T_BOOLEAN);
4532 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4533 JavaCallArguments args;
4534 args.push_int(unicode_ch);
4535
4536 // public static boolean isJavaIdentifierStart(char ch);
4537 JavaCalls::call_static(&result,
4538 klass,
4539 vmSymbols::isJavaIdentifierStart_name(),
4540 vmSymbols::int_bool_signature(),
4541 &args,
4542 THREAD);
4543
4544 if (HAS_PENDING_EXCEPTION) {
4545 CLEAR_PENDING_EXCEPTION;
4546 return 0;
4547 }
4548 if (result.get_jboolean()) {
4549 continue;
4550 }
4551
4552 if (not_first_ch) {
4553 // public static boolean isJavaIdentifierPart(char ch);
4554 JavaCalls::call_static(&result,
4555 klass,
4556 vmSymbols::isJavaIdentifierPart_name(),
4557 vmSymbols::int_bool_signature(),
4558 &args,
4559 THREAD);
4560
4561 if (HAS_PENDING_EXCEPTION) {
4562 CLEAR_PENDING_EXCEPTION;
4563 return 0;
4564 }
4565
4566 if (result.get_jboolean()) {
4567 continue;
4568 }
4569 }
4570 }
4571 return (not_first_ch) ? old_p : NULL;
4572 }
4573 return (not_first_ch) ? p : NULL;
4574 }
4575
4576
4577 // Take pointer to a string. Skip over the longest part of the string that could
4578 // be taken as a field signature. Allow "void" if void_ok.
4579 // Return a pointer to just past the signature.
4580 // Return NULL if no legal signature is found.
4581 char* ClassFileParser::skip_over_field_signature(char* signature,
4582 bool void_ok,
4583 unsigned int length,
4584 TRAPS) {
4585 unsigned int array_dim = 0;
4586 while (length > 0) {
4587 switch (signature[0]) {
4588 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4589 case JVM_SIGNATURE_BOOLEAN:
4590 case JVM_SIGNATURE_BYTE:
4591 case JVM_SIGNATURE_CHAR:
4592 case JVM_SIGNATURE_SHORT:
4593 case JVM_SIGNATURE_INT:
4594 case JVM_SIGNATURE_FLOAT:
4595 case JVM_SIGNATURE_LONG:
4596 case JVM_SIGNATURE_DOUBLE:
4597 return signature + 1;
4598 case JVM_SIGNATURE_CLASS: {
4599 if (_major_version < JAVA_1_5_VERSION) {
4600 // Skip over the class name if one is there
4601 char* p = skip_over_field_name(signature + 1, true, --length);
4602
4603 // The next character better be a semicolon
4604 if (p && (p - signature) > 1 && p[0] == ';') {
4605 return p + 1;
4606 }
4607 } else {
4608 // 4900761: For class version > 48, any unicode is allowed in class name.
4609 length--;
4610 signature++;
4611 while (length > 0 && signature[0] != ';') {
4612 if (signature[0] == '.') {
4613 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4614 }
4615 length--;
4616 signature++;
4617 }
4618 if (signature[0] == ';') { return signature + 1; }
4619 }
4620
4621 return NULL;
4622 }
4623 case JVM_SIGNATURE_ARRAY:
4624 array_dim++;
4625 if (array_dim > 255) {
4626 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4627 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4628 }
4629 // The rest of what's there better be a legal signature
4630 signature++;
4631 length--;
4632 void_ok = false;
4633 break;
4634
4635 default:
4636 return NULL;
4637 }
4638 }
4639 return NULL;
4640 }