Tue, 26 Jun 2012 19:08:44 -0400
7178145: Change constMethodOop::_exception_table to optionally inlined u2 table.
Summary: Change constMethodOop::_exception_table to optionally inlined u2 table.
Reviewed-by: bdelsart, coleenp, kamg
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/verificationType.hpp"
32 #include "classfile/verifier.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "memory/allocation.hpp"
35 #include "memory/gcLocker.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/constantPoolOop.hpp"
39 #include "oops/fieldStreams.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceMirrorKlass.hpp"
42 #include "oops/klass.inline.hpp"
43 #include "oops/klassOop.hpp"
44 #include "oops/klassVtable.hpp"
45 #include "oops/methodOop.hpp"
46 #include "oops/symbol.hpp"
47 #include "prims/jvmtiExport.hpp"
48 #include "prims/jvmtiThreadState.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/perfData.hpp"
51 #include "runtime/reflection.hpp"
52 #include "runtime/signature.hpp"
53 #include "runtime/timer.hpp"
54 #include "services/classLoadingService.hpp"
55 #include "services/threadService.hpp"
57 // We generally try to create the oops directly when parsing, rather than
58 // allocating temporary data structures and copying the bytes twice. A
59 // temporary area is only needed when parsing utf8 entries in the constant
60 // pool and when parsing line number tables.
62 // We add assert in debug mode when class format is not checked.
64 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
65 #define JAVA_MIN_SUPPORTED_VERSION 45
66 #define JAVA_MAX_SUPPORTED_VERSION 51
67 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
69 // Used for two backward compatibility reasons:
70 // - to check for new additions to the class file format in JDK1.5
71 // - to check for bug fixes in the format checker in JDK1.5
72 #define JAVA_1_5_VERSION 49
74 // Used for backward compatibility reasons:
75 // - to check for javac bug fixes that happened after 1.5
76 // - also used as the max version when running in jdk6
77 #define JAVA_6_VERSION 50
79 // Used for backward compatibility reasons:
80 // - to check NameAndType_info signatures more aggressively
81 #define JAVA_7_VERSION 51
84 void ClassFileParser::parse_constant_pool_entries(Handle class_loader, constantPoolHandle cp, int length, TRAPS) {
85 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
86 // this function (_current can be allocated in a register, with scalar
87 // replacement of aggregates). The _current pointer is copied back to
88 // stream() when this function returns. DON'T call another method within
89 // this method that uses stream().
90 ClassFileStream* cfs0 = stream();
91 ClassFileStream cfs1 = *cfs0;
92 ClassFileStream* cfs = &cfs1;
93 #ifdef ASSERT
94 assert(cfs->allocated_on_stack(),"should be local");
95 u1* old_current = cfs0->current();
96 #endif
98 // Used for batching symbol allocations.
99 const char* names[SymbolTable::symbol_alloc_batch_size];
100 int lengths[SymbolTable::symbol_alloc_batch_size];
101 int indices[SymbolTable::symbol_alloc_batch_size];
102 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
103 int names_count = 0;
105 // parsing Index 0 is unused
106 for (int index = 1; index < length; index++) {
107 // Each of the following case guarantees one more byte in the stream
108 // for the following tag or the access_flags following constant pool,
109 // so we don't need bounds-check for reading tag.
110 u1 tag = cfs->get_u1_fast();
111 switch (tag) {
112 case JVM_CONSTANT_Class :
113 {
114 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
115 u2 name_index = cfs->get_u2_fast();
116 cp->klass_index_at_put(index, name_index);
117 }
118 break;
119 case JVM_CONSTANT_Fieldref :
120 {
121 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
122 u2 class_index = cfs->get_u2_fast();
123 u2 name_and_type_index = cfs->get_u2_fast();
124 cp->field_at_put(index, class_index, name_and_type_index);
125 }
126 break;
127 case JVM_CONSTANT_Methodref :
128 {
129 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
130 u2 class_index = cfs->get_u2_fast();
131 u2 name_and_type_index = cfs->get_u2_fast();
132 cp->method_at_put(index, class_index, name_and_type_index);
133 }
134 break;
135 case JVM_CONSTANT_InterfaceMethodref :
136 {
137 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
138 u2 class_index = cfs->get_u2_fast();
139 u2 name_and_type_index = cfs->get_u2_fast();
140 cp->interface_method_at_put(index, class_index, name_and_type_index);
141 }
142 break;
143 case JVM_CONSTANT_String :
144 {
145 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
146 u2 string_index = cfs->get_u2_fast();
147 cp->string_index_at_put(index, string_index);
148 }
149 break;
150 case JVM_CONSTANT_MethodHandle :
151 case JVM_CONSTANT_MethodType :
152 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
153 classfile_parse_error(
154 "Class file version does not support constant tag %u in class file %s",
155 tag, CHECK);
156 }
157 if (!EnableInvokeDynamic) {
158 classfile_parse_error(
159 "This JVM does not support constant tag %u in class file %s",
160 tag, CHECK);
161 }
162 if (tag == JVM_CONSTANT_MethodHandle) {
163 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
164 u1 ref_kind = cfs->get_u1_fast();
165 u2 method_index = cfs->get_u2_fast();
166 cp->method_handle_index_at_put(index, ref_kind, method_index);
167 } else if (tag == JVM_CONSTANT_MethodType) {
168 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
169 u2 signature_index = cfs->get_u2_fast();
170 cp->method_type_index_at_put(index, signature_index);
171 } else {
172 ShouldNotReachHere();
173 }
174 break;
175 case JVM_CONSTANT_InvokeDynamic :
176 {
177 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
178 classfile_parse_error(
179 "Class file version does not support constant tag %u in class file %s",
180 tag, CHECK);
181 }
182 if (!EnableInvokeDynamic) {
183 classfile_parse_error(
184 "This JVM does not support constant tag %u in class file %s",
185 tag, CHECK);
186 }
187 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
188 u2 bootstrap_specifier_index = cfs->get_u2_fast();
189 u2 name_and_type_index = cfs->get_u2_fast();
190 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
191 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
192 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
193 }
194 break;
195 case JVM_CONSTANT_Integer :
196 {
197 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
198 u4 bytes = cfs->get_u4_fast();
199 cp->int_at_put(index, (jint) bytes);
200 }
201 break;
202 case JVM_CONSTANT_Float :
203 {
204 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
205 u4 bytes = cfs->get_u4_fast();
206 cp->float_at_put(index, *(jfloat*)&bytes);
207 }
208 break;
209 case JVM_CONSTANT_Long :
210 // A mangled type might cause you to overrun allocated memory
211 guarantee_property(index+1 < length,
212 "Invalid constant pool entry %u in class file %s",
213 index, CHECK);
214 {
215 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
216 u8 bytes = cfs->get_u8_fast();
217 cp->long_at_put(index, bytes);
218 }
219 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
220 break;
221 case JVM_CONSTANT_Double :
222 // A mangled type might cause you to overrun allocated memory
223 guarantee_property(index+1 < length,
224 "Invalid constant pool entry %u in class file %s",
225 index, CHECK);
226 {
227 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
228 u8 bytes = cfs->get_u8_fast();
229 cp->double_at_put(index, *(jdouble*)&bytes);
230 }
231 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
232 break;
233 case JVM_CONSTANT_NameAndType :
234 {
235 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
236 u2 name_index = cfs->get_u2_fast();
237 u2 signature_index = cfs->get_u2_fast();
238 cp->name_and_type_at_put(index, name_index, signature_index);
239 }
240 break;
241 case JVM_CONSTANT_Utf8 :
242 {
243 cfs->guarantee_more(2, CHECK); // utf8_length
244 u2 utf8_length = cfs->get_u2_fast();
245 u1* utf8_buffer = cfs->get_u1_buffer();
246 assert(utf8_buffer != NULL, "null utf8 buffer");
247 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
248 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
249 cfs->skip_u1_fast(utf8_length);
251 // Before storing the symbol, make sure it's legal
252 if (_need_verify) {
253 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
254 }
256 if (EnableInvokeDynamic && has_cp_patch_at(index)) {
257 Handle patch = clear_cp_patch_at(index);
258 guarantee_property(java_lang_String::is_instance(patch()),
259 "Illegal utf8 patch at %d in class file %s",
260 index, CHECK);
261 char* str = java_lang_String::as_utf8_string(patch());
262 // (could use java_lang_String::as_symbol instead, but might as well batch them)
263 utf8_buffer = (u1*) str;
264 utf8_length = (int) strlen(str);
265 }
267 unsigned int hash;
268 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
269 if (result == NULL) {
270 names[names_count] = (char*)utf8_buffer;
271 lengths[names_count] = utf8_length;
272 indices[names_count] = index;
273 hashValues[names_count++] = hash;
274 if (names_count == SymbolTable::symbol_alloc_batch_size) {
275 SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK);
276 names_count = 0;
277 }
278 } else {
279 cp->symbol_at_put(index, result);
280 }
281 }
282 break;
283 default:
284 classfile_parse_error(
285 "Unknown constant tag %u in class file %s", tag, CHECK);
286 break;
287 }
288 }
290 // Allocate the remaining symbols
291 if (names_count > 0) {
292 SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK);
293 }
295 // Copy _current pointer of local copy back to stream().
296 #ifdef ASSERT
297 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
298 #endif
299 cfs0->set_current(cfs1.current());
300 }
302 // This class unreferences constant pool symbols if an error has occurred
303 // while parsing the class before it is assigned into the class.
304 // If it gets an error after that it is unloaded and the constant pool will
305 // be cleaned up then.
306 class ConstantPoolCleaner : public StackObj {
307 constantPoolHandle _cphandle;
308 bool _in_error;
309 public:
310 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
311 ~ConstantPoolCleaner() {
312 if (_in_error && _cphandle.not_null()) {
313 _cphandle->unreference_symbols();
314 }
315 }
316 void set_in_error(bool clean) { _in_error = clean; }
317 };
319 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
321 constantPoolHandle ClassFileParser::parse_constant_pool(Handle class_loader, TRAPS) {
322 ClassFileStream* cfs = stream();
323 constantPoolHandle nullHandle;
325 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
326 u2 length = cfs->get_u2_fast();
327 guarantee_property(
328 length >= 1, "Illegal constant pool size %u in class file %s",
329 length, CHECK_(nullHandle));
330 constantPoolOop constant_pool =
331 oopFactory::new_constantPool(length,
332 oopDesc::IsSafeConc,
333 CHECK_(nullHandle));
334 constantPoolHandle cp (THREAD, constant_pool);
336 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
337 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
339 // parsing constant pool entries
340 parse_constant_pool_entries(class_loader, cp, length, CHECK_(nullHandle));
342 int index = 1; // declared outside of loops for portability
344 // first verification pass - validate cross references and fixup class and string constants
345 for (index = 1; index < length; index++) { // Index 0 is unused
346 jbyte tag = cp->tag_at(index).value();
347 switch (tag) {
348 case JVM_CONSTANT_Class :
349 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
350 break;
351 case JVM_CONSTANT_Fieldref :
352 // fall through
353 case JVM_CONSTANT_Methodref :
354 // fall through
355 case JVM_CONSTANT_InterfaceMethodref : {
356 if (!_need_verify) break;
357 int klass_ref_index = cp->klass_ref_index_at(index);
358 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
359 check_property(valid_cp_range(klass_ref_index, length) &&
360 is_klass_reference(cp, klass_ref_index),
361 "Invalid constant pool index %u in class file %s",
362 klass_ref_index,
363 CHECK_(nullHandle));
364 check_property(valid_cp_range(name_and_type_ref_index, length) &&
365 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
366 "Invalid constant pool index %u in class file %s",
367 name_and_type_ref_index,
368 CHECK_(nullHandle));
369 break;
370 }
371 case JVM_CONSTANT_String :
372 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
373 break;
374 case JVM_CONSTANT_Integer :
375 break;
376 case JVM_CONSTANT_Float :
377 break;
378 case JVM_CONSTANT_Long :
379 case JVM_CONSTANT_Double :
380 index++;
381 check_property(
382 (index < length && cp->tag_at(index).is_invalid()),
383 "Improper constant pool long/double index %u in class file %s",
384 index, CHECK_(nullHandle));
385 break;
386 case JVM_CONSTANT_NameAndType : {
387 if (!_need_verify) break;
388 int name_ref_index = cp->name_ref_index_at(index);
389 int signature_ref_index = cp->signature_ref_index_at(index);
390 check_property(
391 valid_cp_range(name_ref_index, length) &&
392 cp->tag_at(name_ref_index).is_utf8(),
393 "Invalid constant pool index %u in class file %s",
394 name_ref_index, CHECK_(nullHandle));
395 check_property(
396 valid_cp_range(signature_ref_index, length) &&
397 cp->tag_at(signature_ref_index).is_utf8(),
398 "Invalid constant pool index %u in class file %s",
399 signature_ref_index, CHECK_(nullHandle));
400 break;
401 }
402 case JVM_CONSTANT_Utf8 :
403 break;
404 case JVM_CONSTANT_UnresolvedClass : // fall-through
405 case JVM_CONSTANT_UnresolvedClassInError:
406 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
407 break;
408 case JVM_CONSTANT_ClassIndex :
409 {
410 int class_index = cp->klass_index_at(index);
411 check_property(
412 valid_cp_range(class_index, length) &&
413 cp->tag_at(class_index).is_utf8(),
414 "Invalid constant pool index %u in class file %s",
415 class_index, CHECK_(nullHandle));
416 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
417 }
418 break;
419 case JVM_CONSTANT_UnresolvedString :
420 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
421 break;
422 case JVM_CONSTANT_StringIndex :
423 {
424 int string_index = cp->string_index_at(index);
425 check_property(
426 valid_cp_range(string_index, length) &&
427 cp->tag_at(string_index).is_utf8(),
428 "Invalid constant pool index %u in class file %s",
429 string_index, CHECK_(nullHandle));
430 Symbol* sym = cp->symbol_at(string_index);
431 cp->unresolved_string_at_put(index, sym);
432 }
433 break;
434 case JVM_CONSTANT_MethodHandle :
435 {
436 int ref_index = cp->method_handle_index_at(index);
437 check_property(
438 valid_cp_range(ref_index, length) &&
439 EnableInvokeDynamic,
440 "Invalid constant pool index %u in class file %s",
441 ref_index, CHECK_(nullHandle));
442 constantTag tag = cp->tag_at(ref_index);
443 int ref_kind = cp->method_handle_ref_kind_at(index);
444 switch (ref_kind) {
445 case JVM_REF_getField:
446 case JVM_REF_getStatic:
447 case JVM_REF_putField:
448 case JVM_REF_putStatic:
449 check_property(
450 tag.is_field(),
451 "Invalid constant pool index %u in class file %s (not a field)",
452 ref_index, CHECK_(nullHandle));
453 break;
454 case JVM_REF_invokeVirtual:
455 case JVM_REF_invokeStatic:
456 case JVM_REF_invokeSpecial:
457 case JVM_REF_newInvokeSpecial:
458 check_property(
459 tag.is_method(),
460 "Invalid constant pool index %u in class file %s (not a method)",
461 ref_index, CHECK_(nullHandle));
462 break;
463 case JVM_REF_invokeInterface:
464 check_property(
465 tag.is_interface_method(),
466 "Invalid constant pool index %u in class file %s (not an interface method)",
467 ref_index, CHECK_(nullHandle));
468 break;
469 default:
470 classfile_parse_error(
471 "Bad method handle kind at constant pool index %u in class file %s",
472 index, CHECK_(nullHandle));
473 }
474 // Keep the ref_index unchanged. It will be indirected at link-time.
475 }
476 break;
477 case JVM_CONSTANT_MethodType :
478 {
479 int ref_index = cp->method_type_index_at(index);
480 check_property(
481 valid_cp_range(ref_index, length) &&
482 cp->tag_at(ref_index).is_utf8() &&
483 EnableInvokeDynamic,
484 "Invalid constant pool index %u in class file %s",
485 ref_index, CHECK_(nullHandle));
486 }
487 break;
488 case JVM_CONSTANT_InvokeDynamic :
489 {
490 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
491 check_property(valid_cp_range(name_and_type_ref_index, length) &&
492 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
493 "Invalid constant pool index %u in class file %s",
494 name_and_type_ref_index,
495 CHECK_(nullHandle));
496 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
497 break;
498 }
499 default:
500 fatal(err_msg("bad constant pool tag value %u",
501 cp->tag_at(index).value()));
502 ShouldNotReachHere();
503 break;
504 } // end of switch
505 } // end of for
507 if (_cp_patches != NULL) {
508 // need to treat this_class specially...
509 assert(EnableInvokeDynamic, "");
510 int this_class_index;
511 {
512 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
513 u1* mark = cfs->current();
514 u2 flags = cfs->get_u2_fast();
515 this_class_index = cfs->get_u2_fast();
516 cfs->set_current(mark); // revert to mark
517 }
519 for (index = 1; index < length; index++) { // Index 0 is unused
520 if (has_cp_patch_at(index)) {
521 guarantee_property(index != this_class_index,
522 "Illegal constant pool patch to self at %d in class file %s",
523 index, CHECK_(nullHandle));
524 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
525 }
526 }
527 // Ensure that all the patches have been used.
528 for (index = 0; index < _cp_patches->length(); index++) {
529 guarantee_property(!has_cp_patch_at(index),
530 "Unused constant pool patch at %d in class file %s",
531 index, CHECK_(nullHandle));
532 }
533 }
535 if (!_need_verify) {
536 cp_in_error.set_in_error(false);
537 return cp;
538 }
540 // second verification pass - checks the strings are of the right format.
541 // but not yet to the other entries
542 for (index = 1; index < length; index++) {
543 jbyte tag = cp->tag_at(index).value();
544 switch (tag) {
545 case JVM_CONSTANT_UnresolvedClass: {
546 Symbol* class_name = cp->unresolved_klass_at(index);
547 // check the name, even if _cp_patches will overwrite it
548 verify_legal_class_name(class_name, CHECK_(nullHandle));
549 break;
550 }
551 case JVM_CONSTANT_NameAndType: {
552 if (_need_verify && _major_version >= JAVA_7_VERSION) {
553 int sig_index = cp->signature_ref_index_at(index);
554 int name_index = cp->name_ref_index_at(index);
555 Symbol* name = cp->symbol_at(name_index);
556 Symbol* sig = cp->symbol_at(sig_index);
557 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
558 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
559 } else {
560 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
561 }
562 }
563 break;
564 }
565 case JVM_CONSTANT_InvokeDynamic:
566 case JVM_CONSTANT_Fieldref:
567 case JVM_CONSTANT_Methodref:
568 case JVM_CONSTANT_InterfaceMethodref: {
569 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
570 // already verified to be utf8
571 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
572 // already verified to be utf8
573 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
574 Symbol* name = cp->symbol_at(name_ref_index);
575 Symbol* signature = cp->symbol_at(signature_ref_index);
576 if (tag == JVM_CONSTANT_Fieldref) {
577 verify_legal_field_name(name, CHECK_(nullHandle));
578 if (_need_verify && _major_version >= JAVA_7_VERSION) {
579 // Signature is verified above, when iterating NameAndType_info.
580 // Need only to be sure it's the right type.
581 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
582 throwIllegalSignature(
583 "Field", name, signature, CHECK_(nullHandle));
584 }
585 } else {
586 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
587 }
588 } else {
589 verify_legal_method_name(name, CHECK_(nullHandle));
590 if (_need_verify && _major_version >= JAVA_7_VERSION) {
591 // Signature is verified above, when iterating NameAndType_info.
592 // Need only to be sure it's the right type.
593 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
594 throwIllegalSignature(
595 "Method", name, signature, CHECK_(nullHandle));
596 }
597 } else {
598 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
599 }
600 if (tag == JVM_CONSTANT_Methodref) {
601 // 4509014: If a class method name begins with '<', it must be "<init>".
602 assert(name != NULL, "method name in constant pool is null");
603 unsigned int name_len = name->utf8_length();
604 assert(name_len > 0, "bad method name"); // already verified as legal name
605 if (name->byte_at(0) == '<') {
606 if (name != vmSymbols::object_initializer_name()) {
607 classfile_parse_error(
608 "Bad method name at constant pool index %u in class file %s",
609 name_ref_index, CHECK_(nullHandle));
610 }
611 }
612 }
613 }
614 break;
615 }
616 case JVM_CONSTANT_MethodHandle: {
617 int ref_index = cp->method_handle_index_at(index);
618 int ref_kind = cp->method_handle_ref_kind_at(index);
619 switch (ref_kind) {
620 case JVM_REF_invokeVirtual:
621 case JVM_REF_invokeStatic:
622 case JVM_REF_invokeSpecial:
623 case JVM_REF_newInvokeSpecial:
624 {
625 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
626 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
627 Symbol* name = cp->symbol_at(name_ref_index);
628 if (ref_kind == JVM_REF_newInvokeSpecial) {
629 if (name != vmSymbols::object_initializer_name()) {
630 classfile_parse_error(
631 "Bad constructor name at constant pool index %u in class file %s",
632 name_ref_index, CHECK_(nullHandle));
633 }
634 } else {
635 if (name == vmSymbols::object_initializer_name()) {
636 classfile_parse_error(
637 "Bad method name at constant pool index %u in class file %s",
638 name_ref_index, CHECK_(nullHandle));
639 }
640 }
641 }
642 break;
643 // Other ref_kinds are already fully checked in previous pass.
644 }
645 break;
646 }
647 case JVM_CONSTANT_MethodType: {
648 Symbol* no_name = vmSymbols::type_name(); // place holder
649 Symbol* signature = cp->method_type_signature_at(index);
650 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
651 break;
652 }
653 case JVM_CONSTANT_Utf8: {
654 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
655 }
656 } // end of switch
657 } // end of for
659 cp_in_error.set_in_error(false);
660 return cp;
661 }
664 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
665 assert(EnableInvokeDynamic, "");
666 BasicType patch_type = T_VOID;
667 switch (cp->tag_at(index).value()) {
669 case JVM_CONSTANT_UnresolvedClass :
670 // Patching a class means pre-resolving it.
671 // The name in the constant pool is ignored.
672 if (java_lang_Class::is_instance(patch())) {
673 guarantee_property(!java_lang_Class::is_primitive(patch()),
674 "Illegal class patch at %d in class file %s",
675 index, CHECK);
676 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch()));
677 } else {
678 guarantee_property(java_lang_String::is_instance(patch()),
679 "Illegal class patch at %d in class file %s",
680 index, CHECK);
681 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
682 cp->unresolved_klass_at_put(index, name);
683 }
684 break;
686 case JVM_CONSTANT_UnresolvedString :
687 // Patching a string means pre-resolving it.
688 // The spelling in the constant pool is ignored.
689 // The constant reference may be any object whatever.
690 // If it is not a real interned string, the constant is referred
691 // to as a "pseudo-string", and must be presented to the CP
692 // explicitly, because it may require scavenging.
693 cp->pseudo_string_at_put(index, patch());
694 break;
696 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
697 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
698 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
699 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
700 patch_prim:
701 {
702 jvalue value;
703 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
704 guarantee_property(value_type == patch_type,
705 "Illegal primitive patch at %d in class file %s",
706 index, CHECK);
707 switch (value_type) {
708 case T_INT: cp->int_at_put(index, value.i); break;
709 case T_FLOAT: cp->float_at_put(index, value.f); break;
710 case T_LONG: cp->long_at_put(index, value.j); break;
711 case T_DOUBLE: cp->double_at_put(index, value.d); break;
712 default: assert(false, "");
713 }
714 }
715 break;
717 default:
718 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
719 guarantee_property(!has_cp_patch_at(index),
720 "Illegal unexpected patch at %d in class file %s",
721 index, CHECK);
722 return;
723 }
725 // On fall-through, mark the patch as used.
726 clear_cp_patch_at(index);
727 }
731 class NameSigHash: public ResourceObj {
732 public:
733 Symbol* _name; // name
734 Symbol* _sig; // signature
735 NameSigHash* _next; // Next entry in hash table
736 };
739 #define HASH_ROW_SIZE 256
741 unsigned int hash(Symbol* name, Symbol* sig) {
742 unsigned int raw_hash = 0;
743 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
744 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
746 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
747 }
750 void initialize_hashtable(NameSigHash** table) {
751 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
752 }
754 // Return false if the name/sig combination is found in table.
755 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
756 // The old format checker uses heap sort to find duplicates.
757 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
758 // of table since we don't expect Symbol*'s to move.
759 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
760 assert(name != NULL, "name in constant pool is NULL");
762 // First lookup for duplicates
763 int index = hash(name, sig);
764 NameSigHash* entry = table[index];
765 while (entry != NULL) {
766 if (entry->_name == name && entry->_sig == sig) {
767 return false;
768 }
769 entry = entry->_next;
770 }
772 // No duplicate is found, allocate a new entry and fill it.
773 entry = new NameSigHash();
774 entry->_name = name;
775 entry->_sig = sig;
777 // Insert into hash table
778 entry->_next = table[index];
779 table[index] = entry;
781 return true;
782 }
785 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
786 int length,
787 Handle class_loader,
788 Handle protection_domain,
789 Symbol* class_name,
790 TRAPS) {
791 ClassFileStream* cfs = stream();
792 assert(length > 0, "only called for length>0");
793 objArrayHandle nullHandle;
794 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
795 objArrayHandle interfaces (THREAD, interface_oop);
797 int index;
798 for (index = 0; index < length; index++) {
799 u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
800 KlassHandle interf;
801 check_property(
802 valid_cp_range(interface_index, cp->length()) &&
803 is_klass_reference(cp, interface_index),
804 "Interface name has bad constant pool index %u in class file %s",
805 interface_index, CHECK_(nullHandle));
806 if (cp->tag_at(interface_index).is_klass()) {
807 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
808 } else {
809 Symbol* unresolved_klass = cp->klass_name_at(interface_index);
811 // Don't need to check legal name because it's checked when parsing constant pool.
812 // But need to make sure it's not an array type.
813 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
814 "Bad interface name in class file %s", CHECK_(nullHandle));
816 // Call resolve_super so classcircularity is checked
817 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
818 unresolved_klass, class_loader, protection_domain,
819 false, CHECK_(nullHandle));
820 interf = KlassHandle(THREAD, k);
822 if (LinkWellKnownClasses) // my super type is well known to me
823 cp->klass_at_put(interface_index, interf()); // eagerly resolve
824 }
826 if (!Klass::cast(interf())->is_interface()) {
827 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
828 }
829 interfaces->obj_at_put(index, interf());
830 }
832 if (!_need_verify || length <= 1) {
833 return interfaces;
834 }
836 // Check if there's any duplicates in interfaces
837 ResourceMark rm(THREAD);
838 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
839 THREAD, NameSigHash*, HASH_ROW_SIZE);
840 initialize_hashtable(interface_names);
841 bool dup = false;
842 {
843 debug_only(No_Safepoint_Verifier nsv;)
844 for (index = 0; index < length; index++) {
845 klassOop k = (klassOop)interfaces->obj_at(index);
846 Symbol* name = instanceKlass::cast(k)->name();
847 // If no duplicates, add (name, NULL) in hashtable interface_names.
848 if (!put_after_lookup(name, NULL, interface_names)) {
849 dup = true;
850 break;
851 }
852 }
853 }
854 if (dup) {
855 classfile_parse_error("Duplicate interface name in class file %s",
856 CHECK_(nullHandle));
857 }
859 return interfaces;
860 }
863 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
864 // Make sure the constant pool entry is of a type appropriate to this field
865 guarantee_property(
866 (constantvalue_index > 0 &&
867 constantvalue_index < cp->length()),
868 "Bad initial value index %u in ConstantValue attribute in class file %s",
869 constantvalue_index, CHECK);
870 constantTag value_type = cp->tag_at(constantvalue_index);
871 switch ( cp->basic_type_for_signature_at(signature_index) ) {
872 case T_LONG:
873 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
874 break;
875 case T_FLOAT:
876 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
877 break;
878 case T_DOUBLE:
879 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
880 break;
881 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
882 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
883 break;
884 case T_OBJECT:
885 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
886 && (value_type.is_string() || value_type.is_unresolved_string())),
887 "Bad string initial value in class file %s", CHECK);
888 break;
889 default:
890 classfile_parse_error(
891 "Unable to set initial value %u in class file %s",
892 constantvalue_index, CHECK);
893 }
894 }
897 // Parse attributes for a field.
898 void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
899 u2 attributes_count,
900 bool is_static, u2 signature_index,
901 u2* constantvalue_index_addr,
902 bool* is_synthetic_addr,
903 u2* generic_signature_index_addr,
904 typeArrayHandle* field_annotations,
905 TRAPS) {
906 ClassFileStream* cfs = stream();
907 assert(attributes_count > 0, "length should be greater than 0");
908 u2 constantvalue_index = 0;
909 u2 generic_signature_index = 0;
910 bool is_synthetic = false;
911 u1* runtime_visible_annotations = NULL;
912 int runtime_visible_annotations_length = 0;
913 u1* runtime_invisible_annotations = NULL;
914 int runtime_invisible_annotations_length = 0;
915 while (attributes_count--) {
916 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
917 u2 attribute_name_index = cfs->get_u2_fast();
918 u4 attribute_length = cfs->get_u4_fast();
919 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
920 cp->tag_at(attribute_name_index).is_utf8(),
921 "Invalid field attribute index %u in class file %s",
922 attribute_name_index,
923 CHECK);
924 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
925 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
926 // ignore if non-static
927 if (constantvalue_index != 0) {
928 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
929 }
930 check_property(
931 attribute_length == 2,
932 "Invalid ConstantValue field attribute length %u in class file %s",
933 attribute_length, CHECK);
934 constantvalue_index = cfs->get_u2(CHECK);
935 if (_need_verify) {
936 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
937 }
938 } else if (attribute_name == vmSymbols::tag_synthetic()) {
939 if (attribute_length != 0) {
940 classfile_parse_error(
941 "Invalid Synthetic field attribute length %u in class file %s",
942 attribute_length, CHECK);
943 }
944 is_synthetic = true;
945 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
946 if (attribute_length != 0) {
947 classfile_parse_error(
948 "Invalid Deprecated field attribute length %u in class file %s",
949 attribute_length, CHECK);
950 }
951 } else if (_major_version >= JAVA_1_5_VERSION) {
952 if (attribute_name == vmSymbols::tag_signature()) {
953 if (attribute_length != 2) {
954 classfile_parse_error(
955 "Wrong size %u for field's Signature attribute in class file %s",
956 attribute_length, CHECK);
957 }
958 generic_signature_index = cfs->get_u2(CHECK);
959 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
960 runtime_visible_annotations_length = attribute_length;
961 runtime_visible_annotations = cfs->get_u1_buffer();
962 assert(runtime_visible_annotations != NULL, "null visible annotations");
963 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
964 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
965 runtime_invisible_annotations_length = attribute_length;
966 runtime_invisible_annotations = cfs->get_u1_buffer();
967 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
968 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
969 } else {
970 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
971 }
972 } else {
973 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
974 }
975 }
977 *constantvalue_index_addr = constantvalue_index;
978 *is_synthetic_addr = is_synthetic;
979 *generic_signature_index_addr = generic_signature_index;
980 *field_annotations = assemble_annotations(runtime_visible_annotations,
981 runtime_visible_annotations_length,
982 runtime_invisible_annotations,
983 runtime_invisible_annotations_length,
984 CHECK);
985 return;
986 }
989 // Field allocation types. Used for computing field offsets.
991 enum FieldAllocationType {
992 STATIC_OOP, // Oops
993 STATIC_BYTE, // Boolean, Byte, char
994 STATIC_SHORT, // shorts
995 STATIC_WORD, // ints
996 STATIC_DOUBLE, // aligned long or double
997 NONSTATIC_OOP,
998 NONSTATIC_BYTE,
999 NONSTATIC_SHORT,
1000 NONSTATIC_WORD,
1001 NONSTATIC_DOUBLE,
1002 MAX_FIELD_ALLOCATION_TYPE,
1003 BAD_ALLOCATION_TYPE = -1
1004 };
1006 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1007 BAD_ALLOCATION_TYPE, // 0
1008 BAD_ALLOCATION_TYPE, // 1
1009 BAD_ALLOCATION_TYPE, // 2
1010 BAD_ALLOCATION_TYPE, // 3
1011 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1012 NONSTATIC_SHORT, // T_CHAR = 5,
1013 NONSTATIC_WORD, // T_FLOAT = 6,
1014 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1015 NONSTATIC_BYTE, // T_BYTE = 8,
1016 NONSTATIC_SHORT, // T_SHORT = 9,
1017 NONSTATIC_WORD, // T_INT = 10,
1018 NONSTATIC_DOUBLE, // T_LONG = 11,
1019 NONSTATIC_OOP, // T_OBJECT = 12,
1020 NONSTATIC_OOP, // T_ARRAY = 13,
1021 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1022 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1023 BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16,
1024 BAD_ALLOCATION_TYPE, // T_CONFLICT = 17,
1025 BAD_ALLOCATION_TYPE, // 0
1026 BAD_ALLOCATION_TYPE, // 1
1027 BAD_ALLOCATION_TYPE, // 2
1028 BAD_ALLOCATION_TYPE, // 3
1029 STATIC_BYTE , // T_BOOLEAN = 4,
1030 STATIC_SHORT, // T_CHAR = 5,
1031 STATIC_WORD, // T_FLOAT = 6,
1032 STATIC_DOUBLE, // T_DOUBLE = 7,
1033 STATIC_BYTE, // T_BYTE = 8,
1034 STATIC_SHORT, // T_SHORT = 9,
1035 STATIC_WORD, // T_INT = 10,
1036 STATIC_DOUBLE, // T_LONG = 11,
1037 STATIC_OOP, // T_OBJECT = 12,
1038 STATIC_OOP, // T_ARRAY = 13,
1039 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1040 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1041 BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16,
1042 BAD_ALLOCATION_TYPE, // T_CONFLICT = 17,
1043 };
1045 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1046 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1047 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1048 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1049 return result;
1050 }
1052 class FieldAllocationCount: public ResourceObj {
1053 public:
1054 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1056 FieldAllocationCount() {
1057 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1058 count[i] = 0;
1059 }
1060 }
1062 FieldAllocationType update(bool is_static, BasicType type) {
1063 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1064 // Make sure there is no overflow with injected fields.
1065 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1066 count[atype]++;
1067 return atype;
1068 }
1069 };
1072 typeArrayHandle ClassFileParser::parse_fields(Symbol* class_name,
1073 constantPoolHandle cp, bool is_interface,
1074 FieldAllocationCount *fac,
1075 objArrayHandle* fields_annotations,
1076 u2* java_fields_count_ptr, TRAPS) {
1077 ClassFileStream* cfs = stream();
1078 typeArrayHandle nullHandle;
1079 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1080 u2 length = cfs->get_u2_fast();
1081 *java_fields_count_ptr = length;
1083 int num_injected = 0;
1084 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1085 int total_fields = length + num_injected;
1087 // The field array starts with tuples of shorts
1088 // [access, name index, sig index, initial value index, byte offset].
1089 // A generic signature slot only exists for field with generic
1090 // signature attribute. And the access flag is set with
1091 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1092 // signature slots are at the end of the field array and after all
1093 // other fields data.
1094 //
1095 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1096 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1097 // ...
1098 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1099 // [generic signature index]
1100 // [generic signature index]
1101 // ...
1102 //
1103 // Allocate a temporary resource array for field data. For each field,
1104 // a slot is reserved in the temporary array for the generic signature
1105 // index. After parsing all fields, the data are copied to a permanent
1106 // array and any unused slots will be discarded.
1107 ResourceMark rm(THREAD);
1108 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1109 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1111 typeArrayHandle field_annotations;
1112 // The generic signature slots start after all other fields' data.
1113 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1114 int num_generic_signature = 0;
1115 for (int n = 0; n < length; n++) {
1116 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1118 AccessFlags access_flags;
1119 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1120 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1121 access_flags.set_flags(flags);
1123 u2 name_index = cfs->get_u2_fast();
1124 int cp_size = cp->length();
1125 check_property(
1126 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1127 "Invalid constant pool index %u for field name in class file %s",
1128 name_index, CHECK_(nullHandle));
1129 Symbol* name = cp->symbol_at(name_index);
1130 verify_legal_field_name(name, CHECK_(nullHandle));
1132 u2 signature_index = cfs->get_u2_fast();
1133 check_property(
1134 valid_cp_range(signature_index, cp_size) &&
1135 cp->tag_at(signature_index).is_utf8(),
1136 "Invalid constant pool index %u for field signature in class file %s",
1137 signature_index, CHECK_(nullHandle));
1138 Symbol* sig = cp->symbol_at(signature_index);
1139 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1141 u2 constantvalue_index = 0;
1142 bool is_synthetic = false;
1143 u2 generic_signature_index = 0;
1144 bool is_static = access_flags.is_static();
1146 u2 attributes_count = cfs->get_u2_fast();
1147 if (attributes_count > 0) {
1148 parse_field_attributes(cp, attributes_count, is_static, signature_index,
1149 &constantvalue_index, &is_synthetic,
1150 &generic_signature_index, &field_annotations,
1151 CHECK_(nullHandle));
1152 if (field_annotations.not_null()) {
1153 if (fields_annotations->is_null()) {
1154 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1155 *fields_annotations = objArrayHandle(THREAD, md);
1156 }
1157 (*fields_annotations)->obj_at_put(n, field_annotations());
1158 }
1159 if (is_synthetic) {
1160 access_flags.set_is_synthetic();
1161 }
1162 if (generic_signature_index != 0) {
1163 access_flags.set_field_has_generic_signature();
1164 fa[generic_signature_slot] = generic_signature_index;
1165 generic_signature_slot ++;
1166 num_generic_signature ++;
1167 }
1168 }
1170 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1171 field->initialize(access_flags.as_short(),
1172 name_index,
1173 signature_index,
1174 constantvalue_index,
1175 0);
1177 BasicType type = cp->basic_type_for_signature_at(signature_index);
1179 // Remember how many oops we encountered and compute allocation type
1180 FieldAllocationType atype = fac->update(is_static, type);
1182 // The correct offset is computed later (all oop fields will be located together)
1183 // We temporarily store the allocation type in the offset field
1184 field->set_offset(atype);
1185 }
1187 int index = length;
1188 if (num_injected != 0) {
1189 for (int n = 0; n < num_injected; n++) {
1190 // Check for duplicates
1191 if (injected[n].may_be_java) {
1192 Symbol* name = injected[n].name();
1193 Symbol* signature = injected[n].signature();
1194 bool duplicate = false;
1195 for (int i = 0; i < length; i++) {
1196 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1197 if (name == cp->symbol_at(f->name_index()) &&
1198 signature == cp->symbol_at(f->signature_index())) {
1199 // Symbol is desclared in Java so skip this one
1200 duplicate = true;
1201 break;
1202 }
1203 }
1204 if (duplicate) {
1205 // These will be removed from the field array at the end
1206 continue;
1207 }
1208 }
1210 // Injected field
1211 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1212 field->initialize(JVM_ACC_FIELD_INTERNAL,
1213 injected[n].name_index,
1214 injected[n].signature_index,
1215 0,
1216 0);
1218 BasicType type = FieldType::basic_type(injected[n].signature());
1220 // Remember how many oops we encountered and compute allocation type
1221 FieldAllocationType atype = fac->update(false, type);
1223 // The correct offset is computed later (all oop fields will be located together)
1224 // We temporarily store the allocation type in the offset field
1225 field->set_offset(atype);
1226 index++;
1227 }
1228 }
1230 // Now copy the fields' data from the temporary resource array.
1231 // Sometimes injected fields already exist in the Java source so
1232 // the fields array could be too long. In that case the
1233 // fields array is trimed. Also unused slots that were reserved
1234 // for generic signature indexes are discarded.
1235 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(
1236 index * FieldInfo::field_slots + num_generic_signature,
1237 CHECK_(nullHandle));
1238 typeArrayHandle fields(THREAD, new_fields);
1239 {
1240 int i = 0;
1241 for (; i < index * FieldInfo::field_slots; i++) {
1242 new_fields->short_at_put(i, fa[i]);
1243 }
1244 for (int j = total_fields * FieldInfo::field_slots;
1245 j < generic_signature_slot; j++) {
1246 new_fields->short_at_put(i++, fa[j]);
1247 }
1248 assert(i == new_fields->length(), "");
1249 }
1251 if (_need_verify && length > 1) {
1252 // Check duplicated fields
1253 ResourceMark rm(THREAD);
1254 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1255 THREAD, NameSigHash*, HASH_ROW_SIZE);
1256 initialize_hashtable(names_and_sigs);
1257 bool dup = false;
1258 {
1259 debug_only(No_Safepoint_Verifier nsv;)
1260 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1261 Symbol* name = fs.name();
1262 Symbol* sig = fs.signature();
1263 // If no duplicates, add name/signature in hashtable names_and_sigs.
1264 if (!put_after_lookup(name, sig, names_and_sigs)) {
1265 dup = true;
1266 break;
1267 }
1268 }
1269 }
1270 if (dup) {
1271 classfile_parse_error("Duplicate field name&signature in class file %s",
1272 CHECK_(nullHandle));
1273 }
1274 }
1276 return fields;
1277 }
1280 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1281 while (length-- > 0) {
1282 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1283 }
1284 }
1287 u2* ClassFileParser::parse_exception_table(u4 code_length,
1288 u4 exception_table_length,
1289 constantPoolHandle cp,
1290 TRAPS) {
1291 ClassFileStream* cfs = stream();
1293 u2* exception_table_start = cfs->get_u2_buffer();
1294 assert(exception_table_start != NULL, "null exception table");
1295 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1296 // Will check legal target after parsing code array in verifier.
1297 if (_need_verify) {
1298 for (unsigned int i = 0; i < exception_table_length; i++) {
1299 u2 start_pc = cfs->get_u2_fast();
1300 u2 end_pc = cfs->get_u2_fast();
1301 u2 handler_pc = cfs->get_u2_fast();
1302 u2 catch_type_index = cfs->get_u2_fast();
1303 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1304 "Illegal exception table range in class file %s",
1305 CHECK_NULL);
1306 guarantee_property(handler_pc < code_length,
1307 "Illegal exception table handler in class file %s",
1308 CHECK_NULL);
1309 if (catch_type_index != 0) {
1310 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1311 is_klass_reference(cp, catch_type_index),
1312 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1313 }
1314 }
1315 } else {
1316 cfs->skip_u2_fast(exception_table_length * 4);
1317 }
1318 return exception_table_start;
1319 }
1321 void ClassFileParser::parse_linenumber_table(
1322 u4 code_attribute_length, u4 code_length,
1323 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1324 ClassFileStream* cfs = stream();
1325 unsigned int num_entries = cfs->get_u2(CHECK);
1327 // Each entry is a u2 start_pc, and a u2 line_number
1328 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1330 // Verify line number attribute and table length
1331 check_property(
1332 code_attribute_length == sizeof(u2) + length_in_bytes,
1333 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1335 cfs->guarantee_more(length_in_bytes, CHECK);
1337 if ((*write_stream) == NULL) {
1338 if (length_in_bytes > fixed_buffer_size) {
1339 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1340 } else {
1341 (*write_stream) = new CompressedLineNumberWriteStream(
1342 linenumbertable_buffer, fixed_buffer_size);
1343 }
1344 }
1346 while (num_entries-- > 0) {
1347 u2 bci = cfs->get_u2_fast(); // start_pc
1348 u2 line = cfs->get_u2_fast(); // line_number
1349 guarantee_property(bci < code_length,
1350 "Invalid pc in LineNumberTable in class file %s", CHECK);
1351 (*write_stream)->write_pair(bci, line);
1352 }
1353 }
1356 // Class file LocalVariableTable elements.
1357 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1358 public:
1359 u2 start_bci;
1360 u2 length;
1361 u2 name_cp_index;
1362 u2 descriptor_cp_index;
1363 u2 slot;
1364 };
1367 class LVT_Hash: public CHeapObj {
1368 public:
1369 LocalVariableTableElement *_elem; // element
1370 LVT_Hash* _next; // Next entry in hash table
1371 };
1373 unsigned int hash(LocalVariableTableElement *elem) {
1374 unsigned int raw_hash = elem->start_bci;
1376 raw_hash = elem->length + raw_hash * 37;
1377 raw_hash = elem->name_cp_index + raw_hash * 37;
1378 raw_hash = elem->slot + raw_hash * 37;
1380 return raw_hash % HASH_ROW_SIZE;
1381 }
1383 void initialize_hashtable(LVT_Hash** table) {
1384 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1385 table[i] = NULL;
1386 }
1387 }
1389 void clear_hashtable(LVT_Hash** table) {
1390 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1391 LVT_Hash* current = table[i];
1392 LVT_Hash* next;
1393 while (current != NULL) {
1394 next = current->_next;
1395 current->_next = NULL;
1396 delete(current);
1397 current = next;
1398 }
1399 table[i] = NULL;
1400 }
1401 }
1403 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1404 LVT_Hash* entry = table[index];
1406 /*
1407 * 3-tuple start_bci/length/slot has to be unique key,
1408 * so the following comparison seems to be redundant:
1409 * && elem->name_cp_index == entry->_elem->name_cp_index
1410 */
1411 while (entry != NULL) {
1412 if (elem->start_bci == entry->_elem->start_bci
1413 && elem->length == entry->_elem->length
1414 && elem->name_cp_index == entry->_elem->name_cp_index
1415 && elem->slot == entry->_elem->slot
1416 ) {
1417 return entry;
1418 }
1419 entry = entry->_next;
1420 }
1421 return NULL;
1422 }
1424 // Return false if the local variable is found in table.
1425 // Return true if no duplicate is found.
1426 // And local variable is added as a new entry in table.
1427 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1428 // First lookup for duplicates
1429 int index = hash(elem);
1430 LVT_Hash* entry = LVT_lookup(elem, index, table);
1432 if (entry != NULL) {
1433 return false;
1434 }
1435 // No duplicate is found, allocate a new entry and fill it.
1436 if ((entry = new LVT_Hash()) == NULL) {
1437 return false;
1438 }
1439 entry->_elem = elem;
1441 // Insert into hash table
1442 entry->_next = table[index];
1443 table[index] = entry;
1445 return true;
1446 }
1448 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1449 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1450 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1451 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1452 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1453 lvt->signature_cp_index = 0;
1454 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1455 }
1457 // Function is used to parse both attributes:
1458 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1459 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1460 u2 max_locals,
1461 u4 code_attribute_length,
1462 constantPoolHandle cp,
1463 u2* localvariable_table_length,
1464 bool isLVTT,
1465 TRAPS) {
1466 ClassFileStream* cfs = stream();
1467 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1468 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1469 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1470 // Verify local variable table attribute has right length
1471 if (_need_verify) {
1472 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1473 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1474 }
1475 u2* localvariable_table_start = cfs->get_u2_buffer();
1476 assert(localvariable_table_start != NULL, "null local variable table");
1477 if (!_need_verify) {
1478 cfs->skip_u2_fast(size);
1479 } else {
1480 cfs->guarantee_more(size * 2, CHECK_NULL);
1481 for(int i = 0; i < (*localvariable_table_length); i++) {
1482 u2 start_pc = cfs->get_u2_fast();
1483 u2 length = cfs->get_u2_fast();
1484 u2 name_index = cfs->get_u2_fast();
1485 u2 descriptor_index = cfs->get_u2_fast();
1486 u2 index = cfs->get_u2_fast();
1487 // Assign to a u4 to avoid overflow
1488 u4 end_pc = (u4)start_pc + (u4)length;
1490 if (start_pc >= code_length) {
1491 classfile_parse_error(
1492 "Invalid start_pc %u in %s in class file %s",
1493 start_pc, tbl_name, CHECK_NULL);
1494 }
1495 if (end_pc > code_length) {
1496 classfile_parse_error(
1497 "Invalid length %u in %s in class file %s",
1498 length, tbl_name, CHECK_NULL);
1499 }
1500 int cp_size = cp->length();
1501 guarantee_property(
1502 valid_cp_range(name_index, cp_size) &&
1503 cp->tag_at(name_index).is_utf8(),
1504 "Name index %u in %s has bad constant type in class file %s",
1505 name_index, tbl_name, CHECK_NULL);
1506 guarantee_property(
1507 valid_cp_range(descriptor_index, cp_size) &&
1508 cp->tag_at(descriptor_index).is_utf8(),
1509 "Signature index %u in %s has bad constant type in class file %s",
1510 descriptor_index, tbl_name, CHECK_NULL);
1512 Symbol* name = cp->symbol_at(name_index);
1513 Symbol* sig = cp->symbol_at(descriptor_index);
1514 verify_legal_field_name(name, CHECK_NULL);
1515 u2 extra_slot = 0;
1516 if (!isLVTT) {
1517 verify_legal_field_signature(name, sig, CHECK_NULL);
1519 // 4894874: check special cases for double and long local variables
1520 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1521 sig == vmSymbols::type_signature(T_LONG)) {
1522 extra_slot = 1;
1523 }
1524 }
1525 guarantee_property((index + extra_slot) < max_locals,
1526 "Invalid index %u in %s in class file %s",
1527 index, tbl_name, CHECK_NULL);
1528 }
1529 }
1530 return localvariable_table_start;
1531 }
1534 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1535 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1536 ClassFileStream* cfs = stream();
1537 u2 index = 0; // index in the array with long/double occupying two slots
1538 u4 i1 = *u1_index;
1539 u4 i2 = *u2_index + 1;
1540 for(int i = 0; i < array_length; i++) {
1541 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1542 index++;
1543 if (tag == ITEM_Long || tag == ITEM_Double) {
1544 index++;
1545 } else if (tag == ITEM_Object) {
1546 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1547 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1548 is_klass_reference(cp, class_index),
1549 "Bad class index %u in StackMap in class file %s",
1550 class_index, CHECK);
1551 } else if (tag == ITEM_Uninitialized) {
1552 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1553 guarantee_property(
1554 offset < code_length,
1555 "Bad uninitialized type offset %u in StackMap in class file %s",
1556 offset, CHECK);
1557 } else {
1558 guarantee_property(
1559 tag <= (u1)ITEM_Uninitialized,
1560 "Unknown variable type %u in StackMap in class file %s",
1561 tag, CHECK);
1562 }
1563 }
1564 u2_array[*u2_index] = index;
1565 *u1_index = i1;
1566 *u2_index = i2;
1567 }
1569 typeArrayOop ClassFileParser::parse_stackmap_table(
1570 u4 code_attribute_length, TRAPS) {
1571 if (code_attribute_length == 0)
1572 return NULL;
1574 ClassFileStream* cfs = stream();
1575 u1* stackmap_table_start = cfs->get_u1_buffer();
1576 assert(stackmap_table_start != NULL, "null stackmap table");
1578 // check code_attribute_length first
1579 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1581 if (!_need_verify && !DumpSharedSpaces) {
1582 return NULL;
1583 }
1585 typeArrayOop stackmap_data =
1586 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1588 stackmap_data->set_length(code_attribute_length);
1589 memcpy((void*)stackmap_data->byte_at_addr(0),
1590 (void*)stackmap_table_start, code_attribute_length);
1591 return stackmap_data;
1592 }
1594 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1595 u4 method_attribute_length,
1596 constantPoolHandle cp, TRAPS) {
1597 ClassFileStream* cfs = stream();
1598 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1599 *checked_exceptions_length = cfs->get_u2_fast();
1600 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1601 u2* checked_exceptions_start = cfs->get_u2_buffer();
1602 assert(checked_exceptions_start != NULL, "null checked exceptions");
1603 if (!_need_verify) {
1604 cfs->skip_u2_fast(size);
1605 } else {
1606 // Verify each value in the checked exception table
1607 u2 checked_exception;
1608 u2 len = *checked_exceptions_length;
1609 cfs->guarantee_more(2 * len, CHECK_NULL);
1610 for (int i = 0; i < len; i++) {
1611 checked_exception = cfs->get_u2_fast();
1612 check_property(
1613 valid_cp_range(checked_exception, cp->length()) &&
1614 is_klass_reference(cp, checked_exception),
1615 "Exception name has bad type at constant pool %u in class file %s",
1616 checked_exception, CHECK_NULL);
1617 }
1618 }
1619 // check exceptions attribute length
1620 if (_need_verify) {
1621 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1622 sizeof(u2) * size),
1623 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1624 }
1625 return checked_exceptions_start;
1626 }
1628 void ClassFileParser::throwIllegalSignature(
1629 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1630 ResourceMark rm(THREAD);
1631 Exceptions::fthrow(THREAD_AND_LOCATION,
1632 vmSymbols::java_lang_ClassFormatError(),
1633 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1634 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1635 }
1637 #define MAX_ARGS_SIZE 255
1638 #define MAX_CODE_SIZE 65535
1639 #define INITIAL_MAX_LVT_NUMBER 256
1641 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1642 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1643 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1644 // entire method attribute is parsed.
1645 //
1646 // The promoted_flags parameter is used to pass relevant access_flags
1647 // from the method back up to the containing klass. These flag values
1648 // are added to klass's access_flags.
1650 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1651 AccessFlags *promoted_flags,
1652 typeArrayHandle* method_annotations,
1653 typeArrayHandle* method_parameter_annotations,
1654 typeArrayHandle* method_default_annotations,
1655 TRAPS) {
1656 ClassFileStream* cfs = stream();
1657 methodHandle nullHandle;
1658 ResourceMark rm(THREAD);
1659 // Parse fixed parts
1660 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1662 int flags = cfs->get_u2_fast();
1663 u2 name_index = cfs->get_u2_fast();
1664 int cp_size = cp->length();
1665 check_property(
1666 valid_cp_range(name_index, cp_size) &&
1667 cp->tag_at(name_index).is_utf8(),
1668 "Illegal constant pool index %u for method name in class file %s",
1669 name_index, CHECK_(nullHandle));
1670 Symbol* name = cp->symbol_at(name_index);
1671 verify_legal_method_name(name, CHECK_(nullHandle));
1673 u2 signature_index = cfs->get_u2_fast();
1674 guarantee_property(
1675 valid_cp_range(signature_index, cp_size) &&
1676 cp->tag_at(signature_index).is_utf8(),
1677 "Illegal constant pool index %u for method signature in class file %s",
1678 signature_index, CHECK_(nullHandle));
1679 Symbol* signature = cp->symbol_at(signature_index);
1681 AccessFlags access_flags;
1682 if (name == vmSymbols::class_initializer_name()) {
1683 // We ignore the other access flags for a valid class initializer.
1684 // (JVM Spec 2nd ed., chapter 4.6)
1685 if (_major_version < 51) { // backward compatibility
1686 flags = JVM_ACC_STATIC;
1687 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1688 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1689 }
1690 } else {
1691 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1692 }
1694 int args_size = -1; // only used when _need_verify is true
1695 if (_need_verify) {
1696 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1697 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1698 if (args_size > MAX_ARGS_SIZE) {
1699 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1700 }
1701 }
1703 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1705 // Default values for code and exceptions attribute elements
1706 u2 max_stack = 0;
1707 u2 max_locals = 0;
1708 u4 code_length = 0;
1709 u1* code_start = 0;
1710 u2 exception_table_length = 0;
1711 u2* exception_table_start = NULL;
1712 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1713 u2 checked_exceptions_length = 0;
1714 u2* checked_exceptions_start = NULL;
1715 CompressedLineNumberWriteStream* linenumber_table = NULL;
1716 int linenumber_table_length = 0;
1717 int total_lvt_length = 0;
1718 u2 lvt_cnt = 0;
1719 u2 lvtt_cnt = 0;
1720 bool lvt_allocated = false;
1721 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1722 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1723 u2* localvariable_table_length;
1724 u2** localvariable_table_start;
1725 u2* localvariable_type_table_length;
1726 u2** localvariable_type_table_start;
1727 bool parsed_code_attribute = false;
1728 bool parsed_checked_exceptions_attribute = false;
1729 bool parsed_stackmap_attribute = false;
1730 // stackmap attribute - JDK1.5
1731 typeArrayHandle stackmap_data;
1732 u2 generic_signature_index = 0;
1733 u1* runtime_visible_annotations = NULL;
1734 int runtime_visible_annotations_length = 0;
1735 u1* runtime_invisible_annotations = NULL;
1736 int runtime_invisible_annotations_length = 0;
1737 u1* runtime_visible_parameter_annotations = NULL;
1738 int runtime_visible_parameter_annotations_length = 0;
1739 u1* runtime_invisible_parameter_annotations = NULL;
1740 int runtime_invisible_parameter_annotations_length = 0;
1741 u1* annotation_default = NULL;
1742 int annotation_default_length = 0;
1744 // Parse code and exceptions attribute
1745 u2 method_attributes_count = cfs->get_u2_fast();
1746 while (method_attributes_count--) {
1747 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1748 u2 method_attribute_name_index = cfs->get_u2_fast();
1749 u4 method_attribute_length = cfs->get_u4_fast();
1750 check_property(
1751 valid_cp_range(method_attribute_name_index, cp_size) &&
1752 cp->tag_at(method_attribute_name_index).is_utf8(),
1753 "Invalid method attribute name index %u in class file %s",
1754 method_attribute_name_index, CHECK_(nullHandle));
1756 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1757 if (method_attribute_name == vmSymbols::tag_code()) {
1758 // Parse Code attribute
1759 if (_need_verify) {
1760 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1761 "Code attribute in native or abstract methods in class file %s",
1762 CHECK_(nullHandle));
1763 }
1764 if (parsed_code_attribute) {
1765 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1766 }
1767 parsed_code_attribute = true;
1769 // Stack size, locals size, and code size
1770 if (_major_version == 45 && _minor_version <= 2) {
1771 cfs->guarantee_more(4, CHECK_(nullHandle));
1772 max_stack = cfs->get_u1_fast();
1773 max_locals = cfs->get_u1_fast();
1774 code_length = cfs->get_u2_fast();
1775 } else {
1776 cfs->guarantee_more(8, CHECK_(nullHandle));
1777 max_stack = cfs->get_u2_fast();
1778 max_locals = cfs->get_u2_fast();
1779 code_length = cfs->get_u4_fast();
1780 }
1781 if (_need_verify) {
1782 guarantee_property(args_size <= max_locals,
1783 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1784 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1785 "Invalid method Code length %u in class file %s",
1786 code_length, CHECK_(nullHandle));
1787 }
1788 // Code pointer
1789 code_start = cfs->get_u1_buffer();
1790 assert(code_start != NULL, "null code start");
1791 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1792 cfs->skip_u1_fast(code_length);
1794 // Exception handler table
1795 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1796 exception_table_length = cfs->get_u2_fast();
1797 if (exception_table_length > 0) {
1798 exception_table_start =
1799 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1800 }
1802 // Parse additional attributes in code attribute
1803 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1804 u2 code_attributes_count = cfs->get_u2_fast();
1806 unsigned int calculated_attribute_length = 0;
1808 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1809 calculated_attribute_length =
1810 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1811 } else {
1812 // max_stack, locals and length are smaller in pre-version 45.2 classes
1813 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1814 }
1815 calculated_attribute_length +=
1816 code_length +
1817 sizeof(exception_table_length) +
1818 sizeof(code_attributes_count) +
1819 exception_table_length *
1820 ( sizeof(u2) + // start_pc
1821 sizeof(u2) + // end_pc
1822 sizeof(u2) + // handler_pc
1823 sizeof(u2) ); // catch_type_index
1825 while (code_attributes_count--) {
1826 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1827 u2 code_attribute_name_index = cfs->get_u2_fast();
1828 u4 code_attribute_length = cfs->get_u4_fast();
1829 calculated_attribute_length += code_attribute_length +
1830 sizeof(code_attribute_name_index) +
1831 sizeof(code_attribute_length);
1832 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1833 cp->tag_at(code_attribute_name_index).is_utf8(),
1834 "Invalid code attribute name index %u in class file %s",
1835 code_attribute_name_index,
1836 CHECK_(nullHandle));
1837 if (LoadLineNumberTables &&
1838 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1839 // Parse and compress line number table
1840 parse_linenumber_table(code_attribute_length, code_length,
1841 &linenumber_table, CHECK_(nullHandle));
1843 } else if (LoadLocalVariableTables &&
1844 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1845 // Parse local variable table
1846 if (!lvt_allocated) {
1847 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1848 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1849 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1850 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1851 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1852 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1853 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1854 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1855 lvt_allocated = true;
1856 }
1857 if (lvt_cnt == max_lvt_cnt) {
1858 max_lvt_cnt <<= 1;
1859 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1860 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1861 }
1862 localvariable_table_start[lvt_cnt] =
1863 parse_localvariable_table(code_length,
1864 max_locals,
1865 code_attribute_length,
1866 cp,
1867 &localvariable_table_length[lvt_cnt],
1868 false, // is not LVTT
1869 CHECK_(nullHandle));
1870 total_lvt_length += localvariable_table_length[lvt_cnt];
1871 lvt_cnt++;
1872 } else if (LoadLocalVariableTypeTables &&
1873 _major_version >= JAVA_1_5_VERSION &&
1874 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1875 if (!lvt_allocated) {
1876 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1877 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1878 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1879 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1880 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1881 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1882 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1883 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1884 lvt_allocated = true;
1885 }
1886 // Parse local variable type table
1887 if (lvtt_cnt == max_lvtt_cnt) {
1888 max_lvtt_cnt <<= 1;
1889 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1890 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1891 }
1892 localvariable_type_table_start[lvtt_cnt] =
1893 parse_localvariable_table(code_length,
1894 max_locals,
1895 code_attribute_length,
1896 cp,
1897 &localvariable_type_table_length[lvtt_cnt],
1898 true, // is LVTT
1899 CHECK_(nullHandle));
1900 lvtt_cnt++;
1901 } else if (UseSplitVerifier &&
1902 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1903 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1904 // Stack map is only needed by the new verifier in JDK1.5.
1905 if (parsed_stackmap_attribute) {
1906 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1907 }
1908 typeArrayOop sm =
1909 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1910 stackmap_data = typeArrayHandle(THREAD, sm);
1911 parsed_stackmap_attribute = true;
1912 } else {
1913 // Skip unknown attributes
1914 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1915 }
1916 }
1917 // check method attribute length
1918 if (_need_verify) {
1919 guarantee_property(method_attribute_length == calculated_attribute_length,
1920 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1921 }
1922 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1923 // Parse Exceptions attribute
1924 if (parsed_checked_exceptions_attribute) {
1925 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1926 }
1927 parsed_checked_exceptions_attribute = true;
1928 checked_exceptions_start =
1929 parse_checked_exceptions(&checked_exceptions_length,
1930 method_attribute_length,
1931 cp, CHECK_(nullHandle));
1932 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1933 if (method_attribute_length != 0) {
1934 classfile_parse_error(
1935 "Invalid Synthetic method attribute length %u in class file %s",
1936 method_attribute_length, CHECK_(nullHandle));
1937 }
1938 // Should we check that there hasn't already been a synthetic attribute?
1939 access_flags.set_is_synthetic();
1940 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1941 if (method_attribute_length != 0) {
1942 classfile_parse_error(
1943 "Invalid Deprecated method attribute length %u in class file %s",
1944 method_attribute_length, CHECK_(nullHandle));
1945 }
1946 } else if (_major_version >= JAVA_1_5_VERSION) {
1947 if (method_attribute_name == vmSymbols::tag_signature()) {
1948 if (method_attribute_length != 2) {
1949 classfile_parse_error(
1950 "Invalid Signature attribute length %u in class file %s",
1951 method_attribute_length, CHECK_(nullHandle));
1952 }
1953 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
1954 generic_signature_index = cfs->get_u2_fast();
1955 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1956 runtime_visible_annotations_length = method_attribute_length;
1957 runtime_visible_annotations = cfs->get_u1_buffer();
1958 assert(runtime_visible_annotations != NULL, "null visible annotations");
1959 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1960 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1961 runtime_invisible_annotations_length = method_attribute_length;
1962 runtime_invisible_annotations = cfs->get_u1_buffer();
1963 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1964 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1965 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1966 runtime_visible_parameter_annotations_length = method_attribute_length;
1967 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1968 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1969 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1970 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1971 runtime_invisible_parameter_annotations_length = method_attribute_length;
1972 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1973 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1974 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1975 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1976 annotation_default_length = method_attribute_length;
1977 annotation_default = cfs->get_u1_buffer();
1978 assert(annotation_default != NULL, "null annotation default");
1979 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1980 } else {
1981 // Skip unknown attributes
1982 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1983 }
1984 } else {
1985 // Skip unknown attributes
1986 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1987 }
1988 }
1990 if (linenumber_table != NULL) {
1991 linenumber_table->write_terminator();
1992 linenumber_table_length = linenumber_table->position();
1993 }
1995 // Make sure there's at least one Code attribute in non-native/non-abstract method
1996 if (_need_verify) {
1997 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
1998 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
1999 }
2001 // All sizing information for a methodOop is finally available, now create it
2002 methodOop m_oop = oopFactory::new_method(code_length, access_flags,
2003 linenumber_table_length,
2004 total_lvt_length,
2005 exception_table_length,
2006 checked_exceptions_length,
2007 oopDesc::IsSafeConc,
2008 CHECK_(nullHandle));
2009 methodHandle m (THREAD, m_oop);
2011 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
2013 // Fill in information from fixed part (access_flags already set)
2014 m->set_constants(cp());
2015 m->set_name_index(name_index);
2016 m->set_signature_index(signature_index);
2017 m->set_generic_signature_index(generic_signature_index);
2018 #ifdef CC_INTERP
2019 // hmm is there a gc issue here??
2020 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2021 m->set_result_index(rtf.type());
2022 #endif
2024 if (args_size >= 0) {
2025 m->set_size_of_parameters(args_size);
2026 } else {
2027 m->compute_size_of_parameters(THREAD);
2028 }
2029 #ifdef ASSERT
2030 if (args_size >= 0) {
2031 m->compute_size_of_parameters(THREAD);
2032 assert(args_size == m->size_of_parameters(), "");
2033 }
2034 #endif
2036 // Fill in code attribute information
2037 m->set_max_stack(max_stack);
2038 m->set_max_locals(max_locals);
2040 /**
2041 * The stackmap_data field is the flag used to indicate
2042 * that the methodOop and it's associated constMethodOop are partially
2043 * initialized and thus are exempt from pre/post GC verification. Once
2044 * the field is set, the oops are considered fully initialized so make
2045 * sure that the oops can pass verification when this field is set.
2046 */
2047 m->constMethod()->set_stackmap_data(stackmap_data());
2049 // Copy byte codes
2050 m->set_code(code_start);
2052 // Copy line number table
2053 if (linenumber_table != NULL) {
2054 memcpy(m->compressed_linenumber_table(),
2055 linenumber_table->buffer(), linenumber_table_length);
2056 }
2058 // Copy exception table
2059 if (exception_table_length > 0) {
2060 int size =
2061 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2062 copy_u2_with_conversion((u2*) m->exception_table_start(),
2063 exception_table_start, size);
2064 }
2066 // Copy checked exceptions
2067 if (checked_exceptions_length > 0) {
2068 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2069 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2070 }
2072 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2073 *
2074 * Rules for LVT's and LVTT's are:
2075 * - There can be any number of LVT's and LVTT's.
2076 * - If there are n LVT's, it is the same as if there was just
2077 * one LVT containing all the entries from the n LVT's.
2078 * - There may be no more than one LVT entry per local variable.
2079 * Two LVT entries are 'equal' if these fields are the same:
2080 * start_pc, length, name, slot
2081 * - There may be no more than one LVTT entry per each LVT entry.
2082 * Each LVTT entry has to match some LVT entry.
2083 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2084 */
2085 if (total_lvt_length > 0) {
2086 int tbl_no, idx;
2088 promoted_flags->set_has_localvariable_table();
2090 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2091 initialize_hashtable(lvt_Hash);
2093 // To fill LocalVariableTable in
2094 Classfile_LVT_Element* cf_lvt;
2095 LocalVariableTableElement* lvt = m->localvariable_table_start();
2097 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2098 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2099 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2100 copy_lvt_element(&cf_lvt[idx], lvt);
2101 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2102 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2103 && _need_verify
2104 && _major_version >= JAVA_1_5_VERSION ) {
2105 clear_hashtable(lvt_Hash);
2106 classfile_parse_error("Duplicated LocalVariableTable attribute "
2107 "entry for '%s' in class file %s",
2108 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2109 CHECK_(nullHandle));
2110 }
2111 }
2112 }
2114 // To merge LocalVariableTable and LocalVariableTypeTable
2115 Classfile_LVT_Element* cf_lvtt;
2116 LocalVariableTableElement lvtt_elem;
2118 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2119 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2120 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2121 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2122 int index = hash(&lvtt_elem);
2123 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2124 if (entry == NULL) {
2125 if (_need_verify) {
2126 clear_hashtable(lvt_Hash);
2127 classfile_parse_error("LVTT entry for '%s' in class file %s "
2128 "does not match any LVT entry",
2129 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2130 CHECK_(nullHandle));
2131 }
2132 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2133 clear_hashtable(lvt_Hash);
2134 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2135 "entry for '%s' in class file %s",
2136 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2137 CHECK_(nullHandle));
2138 } else {
2139 // to add generic signatures into LocalVariableTable
2140 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2141 }
2142 }
2143 }
2144 clear_hashtable(lvt_Hash);
2145 }
2147 *method_annotations = assemble_annotations(runtime_visible_annotations,
2148 runtime_visible_annotations_length,
2149 runtime_invisible_annotations,
2150 runtime_invisible_annotations_length,
2151 CHECK_(nullHandle));
2152 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
2153 runtime_visible_parameter_annotations_length,
2154 runtime_invisible_parameter_annotations,
2155 runtime_invisible_parameter_annotations_length,
2156 CHECK_(nullHandle));
2157 *method_default_annotations = assemble_annotations(annotation_default,
2158 annotation_default_length,
2159 NULL,
2160 0,
2161 CHECK_(nullHandle));
2163 if (name == vmSymbols::finalize_method_name() &&
2164 signature == vmSymbols::void_method_signature()) {
2165 if (m->is_empty_method()) {
2166 _has_empty_finalizer = true;
2167 } else {
2168 _has_finalizer = true;
2169 }
2170 }
2171 if (name == vmSymbols::object_initializer_name() &&
2172 signature == vmSymbols::void_method_signature() &&
2173 m->is_vanilla_constructor()) {
2174 _has_vanilla_constructor = true;
2175 }
2177 if (EnableInvokeDynamic && (m->is_method_handle_invoke() ||
2178 m->is_method_handle_adapter())) {
2179 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
2180 "Method handle invokers must be defined internally to the VM", nullHandle);
2181 }
2183 return m;
2184 }
2187 // The promoted_flags parameter is used to pass relevant access_flags
2188 // from the methods back up to the containing klass. These flag values
2189 // are added to klass's access_flags.
2191 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
2192 AccessFlags* promoted_flags,
2193 bool* has_final_method,
2194 objArrayOop* methods_annotations_oop,
2195 objArrayOop* methods_parameter_annotations_oop,
2196 objArrayOop* methods_default_annotations_oop,
2197 TRAPS) {
2198 ClassFileStream* cfs = stream();
2199 objArrayHandle nullHandle;
2200 typeArrayHandle method_annotations;
2201 typeArrayHandle method_parameter_annotations;
2202 typeArrayHandle method_default_annotations;
2203 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
2204 u2 length = cfs->get_u2_fast();
2205 if (length == 0) {
2206 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2207 } else {
2208 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2209 objArrayHandle methods(THREAD, m);
2210 HandleMark hm(THREAD);
2211 objArrayHandle methods_annotations;
2212 objArrayHandle methods_parameter_annotations;
2213 objArrayHandle methods_default_annotations;
2214 for (int index = 0; index < length; index++) {
2215 methodHandle method = parse_method(cp, is_interface,
2216 promoted_flags,
2217 &method_annotations,
2218 &method_parameter_annotations,
2219 &method_default_annotations,
2220 CHECK_(nullHandle));
2221 if (method->is_final()) {
2222 *has_final_method = true;
2223 }
2224 methods->obj_at_put(index, method());
2225 if (method_annotations.not_null()) {
2226 if (methods_annotations.is_null()) {
2227 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2228 methods_annotations = objArrayHandle(THREAD, md);
2229 }
2230 methods_annotations->obj_at_put(index, method_annotations());
2231 }
2232 if (method_parameter_annotations.not_null()) {
2233 if (methods_parameter_annotations.is_null()) {
2234 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2235 methods_parameter_annotations = objArrayHandle(THREAD, md);
2236 }
2237 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
2238 }
2239 if (method_default_annotations.not_null()) {
2240 if (methods_default_annotations.is_null()) {
2241 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2242 methods_default_annotations = objArrayHandle(THREAD, md);
2243 }
2244 methods_default_annotations->obj_at_put(index, method_default_annotations());
2245 }
2246 }
2247 if (_need_verify && length > 1) {
2248 // Check duplicated methods
2249 ResourceMark rm(THREAD);
2250 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2251 THREAD, NameSigHash*, HASH_ROW_SIZE);
2252 initialize_hashtable(names_and_sigs);
2253 bool dup = false;
2254 {
2255 debug_only(No_Safepoint_Verifier nsv;)
2256 for (int i = 0; i < length; i++) {
2257 methodOop m = (methodOop)methods->obj_at(i);
2258 // If no duplicates, add name/signature in hashtable names_and_sigs.
2259 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2260 dup = true;
2261 break;
2262 }
2263 }
2264 }
2265 if (dup) {
2266 classfile_parse_error("Duplicate method name&signature in class file %s",
2267 CHECK_(nullHandle));
2268 }
2269 }
2271 *methods_annotations_oop = methods_annotations();
2272 *methods_parameter_annotations_oop = methods_parameter_annotations();
2273 *methods_default_annotations_oop = methods_default_annotations();
2275 return methods;
2276 }
2277 }
2280 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
2281 objArrayHandle methods_annotations,
2282 objArrayHandle methods_parameter_annotations,
2283 objArrayHandle methods_default_annotations,
2284 TRAPS) {
2285 typeArrayHandle nullHandle;
2286 int length = methods()->length();
2287 // If JVMTI original method ordering or sharing is enabled we have to
2288 // remember the original class file ordering.
2289 // We temporarily use the vtable_index field in the methodOop to store the
2290 // class file index, so we can read in after calling qsort.
2291 // Put the method ordering in the shared archive.
2292 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2293 for (int index = 0; index < length; index++) {
2294 methodOop m = methodOop(methods->obj_at(index));
2295 assert(!m->valid_vtable_index(), "vtable index should not be set");
2296 m->set_vtable_index(index);
2297 }
2298 }
2299 // Sort method array by ascending method name (for faster lookups & vtable construction)
2300 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2301 methodOopDesc::sort_methods(methods(),
2302 methods_annotations(),
2303 methods_parameter_annotations(),
2304 methods_default_annotations());
2306 // If JVMTI original method ordering or sharing is enabled construct int
2307 // array remembering the original ordering
2308 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2309 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
2310 typeArrayHandle method_ordering(THREAD, new_ordering);
2311 for (int index = 0; index < length; index++) {
2312 methodOop m = methodOop(methods->obj_at(index));
2313 int old_index = m->vtable_index();
2314 assert(old_index >= 0 && old_index < length, "invalid method index");
2315 method_ordering->int_at_put(index, old_index);
2316 m->set_vtable_index(methodOopDesc::invalid_vtable_index);
2317 }
2318 return method_ordering;
2319 } else {
2320 return typeArrayHandle(THREAD, Universe::the_empty_int_array());
2321 }
2322 }
2325 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2326 ClassFileStream* cfs = stream();
2327 cfs->guarantee_more(2, CHECK); // sourcefile_index
2328 u2 sourcefile_index = cfs->get_u2_fast();
2329 check_property(
2330 valid_cp_range(sourcefile_index, cp->length()) &&
2331 cp->tag_at(sourcefile_index).is_utf8(),
2332 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2333 sourcefile_index, CHECK);
2334 k->set_source_file_name(cp->symbol_at(sourcefile_index));
2335 }
2339 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2340 instanceKlassHandle k,
2341 int length, TRAPS) {
2342 ClassFileStream* cfs = stream();
2343 u1* sde_buffer = cfs->get_u1_buffer();
2344 assert(sde_buffer != NULL, "null sde buffer");
2346 // Don't bother storing it if there is no way to retrieve it
2347 if (JvmtiExport::can_get_source_debug_extension()) {
2348 // Optimistically assume that only 1 byte UTF format is used
2349 // (common case)
2350 TempNewSymbol sde_symbol = SymbolTable::new_symbol((const char*)sde_buffer, length, CHECK);
2351 k->set_source_debug_extension(sde_symbol);
2352 // Note that set_source_debug_extension() increments the reference count
2353 // for its copy of the Symbol*, so use a TempNewSymbol here.
2354 }
2355 // Got utf8 string, set stream position forward
2356 cfs->skip_u1(length, CHECK);
2357 }
2360 // Inner classes can be static, private or protected (classic VM does this)
2361 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2363 // Return number of classes in the inner classes attribute table
2364 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2365 bool parsed_enclosingmethod_attribute,
2366 u2 enclosing_method_class_index,
2367 u2 enclosing_method_method_index,
2368 constantPoolHandle cp,
2369 instanceKlassHandle k, TRAPS) {
2370 ClassFileStream* cfs = stream();
2371 u1* current_mark = cfs->current();
2372 u2 length = 0;
2373 if (inner_classes_attribute_start != NULL) {
2374 cfs->set_current(inner_classes_attribute_start);
2375 cfs->guarantee_more(2, CHECK_0); // length
2376 length = cfs->get_u2_fast();
2377 }
2379 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2380 // method data:
2381 // [inner_class_info_index,
2382 // outer_class_info_index,
2383 // inner_name_index,
2384 // inner_class_access_flags,
2385 // ...
2386 // enclosing_method_class_index,
2387 // enclosing_method_method_index]
2388 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2389 typeArrayOop ic = oopFactory::new_permanent_shortArray(size, CHECK_0);
2390 typeArrayHandle inner_classes(THREAD, ic);
2391 int index = 0;
2392 int cp_size = cp->length();
2393 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2394 for (int n = 0; n < length; n++) {
2395 // Inner class index
2396 u2 inner_class_info_index = cfs->get_u2_fast();
2397 check_property(
2398 inner_class_info_index == 0 ||
2399 (valid_cp_range(inner_class_info_index, cp_size) &&
2400 is_klass_reference(cp, inner_class_info_index)),
2401 "inner_class_info_index %u has bad constant type in class file %s",
2402 inner_class_info_index, CHECK_0);
2403 // Outer class index
2404 u2 outer_class_info_index = cfs->get_u2_fast();
2405 check_property(
2406 outer_class_info_index == 0 ||
2407 (valid_cp_range(outer_class_info_index, cp_size) &&
2408 is_klass_reference(cp, outer_class_info_index)),
2409 "outer_class_info_index %u has bad constant type in class file %s",
2410 outer_class_info_index, CHECK_0);
2411 // Inner class name
2412 u2 inner_name_index = cfs->get_u2_fast();
2413 check_property(
2414 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2415 cp->tag_at(inner_name_index).is_utf8()),
2416 "inner_name_index %u has bad constant type in class file %s",
2417 inner_name_index, CHECK_0);
2418 if (_need_verify) {
2419 guarantee_property(inner_class_info_index != outer_class_info_index,
2420 "Class is both outer and inner class in class file %s", CHECK_0);
2421 }
2422 // Access flags
2423 AccessFlags inner_access_flags;
2424 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2425 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2426 // Set abstract bit for old class files for backward compatibility
2427 flags |= JVM_ACC_ABSTRACT;
2428 }
2429 verify_legal_class_modifiers(flags, CHECK_0);
2430 inner_access_flags.set_flags(flags);
2432 inner_classes->short_at_put(index++, inner_class_info_index);
2433 inner_classes->short_at_put(index++, outer_class_info_index);
2434 inner_classes->short_at_put(index++, inner_name_index);
2435 inner_classes->short_at_put(index++, inner_access_flags.as_short());
2436 }
2438 // 4347400: make sure there's no duplicate entry in the classes array
2439 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2440 for(int i = 0; i < length * 4; i += 4) {
2441 for(int j = i + 4; j < length * 4; j += 4) {
2442 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
2443 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2444 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2445 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2446 "Duplicate entry in InnerClasses in class file %s",
2447 CHECK_0);
2448 }
2449 }
2450 }
2452 // Set EnclosingMethod class and method indexes.
2453 if (parsed_enclosingmethod_attribute) {
2454 inner_classes->short_at_put(index++, enclosing_method_class_index);
2455 inner_classes->short_at_put(index++, enclosing_method_method_index);
2456 }
2457 assert(index == size, "wrong size");
2459 // Update instanceKlass with inner class info.
2460 k->set_inner_classes(inner_classes());
2462 // Restore buffer's current position.
2463 cfs->set_current(current_mark);
2465 return length;
2466 }
2468 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2469 k->set_is_synthetic();
2470 }
2472 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2473 ClassFileStream* cfs = stream();
2474 u2 signature_index = cfs->get_u2(CHECK);
2475 check_property(
2476 valid_cp_range(signature_index, cp->length()) &&
2477 cp->tag_at(signature_index).is_utf8(),
2478 "Invalid constant pool index %u in Signature attribute in class file %s",
2479 signature_index, CHECK);
2480 k->set_generic_signature(cp->symbol_at(signature_index));
2481 }
2483 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k,
2484 u4 attribute_byte_length, TRAPS) {
2485 ClassFileStream* cfs = stream();
2486 u1* current_start = cfs->current();
2488 cfs->guarantee_more(2, CHECK); // length
2489 int attribute_array_length = cfs->get_u2_fast();
2491 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2492 "Short length on BootstrapMethods in class file %s",
2493 CHECK);
2495 // The attribute contains a counted array of counted tuples of shorts,
2496 // represending bootstrap specifiers:
2497 // length*{bootstrap_method_index, argument_count*{argument_index}}
2498 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2499 // operand_count = number of shorts in attr, except for leading length
2501 // The attribute is copied into a short[] array.
2502 // The array begins with a series of short[2] pairs, one for each tuple.
2503 int index_size = (attribute_array_length * 2);
2505 typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK);
2506 typeArrayHandle operands(THREAD, operands_oop);
2507 operands_oop = NULL; // tidy
2509 int operand_fill_index = index_size;
2510 int cp_size = cp->length();
2512 for (int n = 0; n < attribute_array_length; n++) {
2513 // Store a 32-bit offset into the header of the operand array.
2514 assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, "");
2515 constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index);
2517 // Read a bootstrap specifier.
2518 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2519 u2 bootstrap_method_index = cfs->get_u2_fast();
2520 u2 argument_count = cfs->get_u2_fast();
2521 check_property(
2522 valid_cp_range(bootstrap_method_index, cp_size) &&
2523 cp->tag_at(bootstrap_method_index).is_method_handle(),
2524 "bootstrap_method_index %u has bad constant type in class file %s",
2525 bootstrap_method_index,
2526 CHECK);
2527 operands->short_at_put(operand_fill_index++, bootstrap_method_index);
2528 operands->short_at_put(operand_fill_index++, argument_count);
2530 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2531 for (int j = 0; j < argument_count; j++) {
2532 u2 argument_index = cfs->get_u2_fast();
2533 check_property(
2534 valid_cp_range(argument_index, cp_size) &&
2535 cp->tag_at(argument_index).is_loadable_constant(),
2536 "argument_index %u has bad constant type in class file %s",
2537 argument_index,
2538 CHECK);
2539 operands->short_at_put(operand_fill_index++, argument_index);
2540 }
2541 }
2543 assert(operand_fill_index == operands()->length(), "exact fill");
2544 assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode");
2546 u1* current_end = cfs->current();
2547 guarantee_property(current_end == current_start + attribute_byte_length,
2548 "Bad length on BootstrapMethods in class file %s",
2549 CHECK);
2551 cp->set_operands(operands());
2552 }
2555 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2556 ClassFileStream* cfs = stream();
2557 // Set inner classes attribute to default sentinel
2558 k->set_inner_classes(Universe::the_empty_short_array());
2559 cfs->guarantee_more(2, CHECK); // attributes_count
2560 u2 attributes_count = cfs->get_u2_fast();
2561 bool parsed_sourcefile_attribute = false;
2562 bool parsed_innerclasses_attribute = false;
2563 bool parsed_enclosingmethod_attribute = false;
2564 bool parsed_bootstrap_methods_attribute = false;
2565 u1* runtime_visible_annotations = NULL;
2566 int runtime_visible_annotations_length = 0;
2567 u1* runtime_invisible_annotations = NULL;
2568 int runtime_invisible_annotations_length = 0;
2569 u1* inner_classes_attribute_start = NULL;
2570 u4 inner_classes_attribute_length = 0;
2571 u2 enclosing_method_class_index = 0;
2572 u2 enclosing_method_method_index = 0;
2573 // Iterate over attributes
2574 while (attributes_count--) {
2575 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2576 u2 attribute_name_index = cfs->get_u2_fast();
2577 u4 attribute_length = cfs->get_u4_fast();
2578 check_property(
2579 valid_cp_range(attribute_name_index, cp->length()) &&
2580 cp->tag_at(attribute_name_index).is_utf8(),
2581 "Attribute name has bad constant pool index %u in class file %s",
2582 attribute_name_index, CHECK);
2583 Symbol* tag = cp->symbol_at(attribute_name_index);
2584 if (tag == vmSymbols::tag_source_file()) {
2585 // Check for SourceFile tag
2586 if (_need_verify) {
2587 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2588 }
2589 if (parsed_sourcefile_attribute) {
2590 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2591 } else {
2592 parsed_sourcefile_attribute = true;
2593 }
2594 parse_classfile_sourcefile_attribute(cp, k, CHECK);
2595 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2596 // Check for SourceDebugExtension tag
2597 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
2598 } else if (tag == vmSymbols::tag_inner_classes()) {
2599 // Check for InnerClasses tag
2600 if (parsed_innerclasses_attribute) {
2601 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2602 } else {
2603 parsed_innerclasses_attribute = true;
2604 }
2605 inner_classes_attribute_start = cfs->get_u1_buffer();
2606 inner_classes_attribute_length = attribute_length;
2607 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2608 } else if (tag == vmSymbols::tag_synthetic()) {
2609 // Check for Synthetic tag
2610 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2611 if (attribute_length != 0) {
2612 classfile_parse_error(
2613 "Invalid Synthetic classfile attribute length %u in class file %s",
2614 attribute_length, CHECK);
2615 }
2616 parse_classfile_synthetic_attribute(cp, k, CHECK);
2617 } else if (tag == vmSymbols::tag_deprecated()) {
2618 // Check for Deprecatd tag - 4276120
2619 if (attribute_length != 0) {
2620 classfile_parse_error(
2621 "Invalid Deprecated classfile attribute length %u in class file %s",
2622 attribute_length, CHECK);
2623 }
2624 } else if (_major_version >= JAVA_1_5_VERSION) {
2625 if (tag == vmSymbols::tag_signature()) {
2626 if (attribute_length != 2) {
2627 classfile_parse_error(
2628 "Wrong Signature attribute length %u in class file %s",
2629 attribute_length, CHECK);
2630 }
2631 parse_classfile_signature_attribute(cp, k, CHECK);
2632 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2633 runtime_visible_annotations_length = attribute_length;
2634 runtime_visible_annotations = cfs->get_u1_buffer();
2635 assert(runtime_visible_annotations != NULL, "null visible annotations");
2636 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2637 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2638 runtime_invisible_annotations_length = attribute_length;
2639 runtime_invisible_annotations = cfs->get_u1_buffer();
2640 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2641 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2642 } else if (tag == vmSymbols::tag_enclosing_method()) {
2643 if (parsed_enclosingmethod_attribute) {
2644 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2645 } else {
2646 parsed_enclosingmethod_attribute = true;
2647 }
2648 cfs->guarantee_more(4, CHECK); // class_index, method_index
2649 enclosing_method_class_index = cfs->get_u2_fast();
2650 enclosing_method_method_index = cfs->get_u2_fast();
2651 if (enclosing_method_class_index == 0) {
2652 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2653 }
2654 // Validate the constant pool indices and types
2655 if (!cp->is_within_bounds(enclosing_method_class_index) ||
2656 !is_klass_reference(cp, enclosing_method_class_index)) {
2657 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2658 }
2659 if (enclosing_method_method_index != 0 &&
2660 (!cp->is_within_bounds(enclosing_method_method_index) ||
2661 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2662 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2663 }
2664 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2665 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2666 if (parsed_bootstrap_methods_attribute)
2667 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2668 parsed_bootstrap_methods_attribute = true;
2669 parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK);
2670 } else {
2671 // Unknown attribute
2672 cfs->skip_u1(attribute_length, CHECK);
2673 }
2674 } else {
2675 // Unknown attribute
2676 cfs->skip_u1(attribute_length, CHECK);
2677 }
2678 }
2679 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2680 runtime_visible_annotations_length,
2681 runtime_invisible_annotations,
2682 runtime_invisible_annotations_length,
2683 CHECK);
2684 k->set_class_annotations(annotations());
2686 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
2687 u2 num_of_classes = parse_classfile_inner_classes_attribute(
2688 inner_classes_attribute_start,
2689 parsed_innerclasses_attribute,
2690 enclosing_method_class_index,
2691 enclosing_method_method_index,
2692 cp, k, CHECK);
2693 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
2694 guarantee_property(
2695 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2696 "Wrong InnerClasses attribute length in class file %s", CHECK);
2697 }
2698 }
2700 if (_max_bootstrap_specifier_index >= 0) {
2701 guarantee_property(parsed_bootstrap_methods_attribute,
2702 "Missing BootstrapMethods attribute in class file %s", CHECK);
2703 }
2704 }
2707 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2708 int runtime_visible_annotations_length,
2709 u1* runtime_invisible_annotations,
2710 int runtime_invisible_annotations_length, TRAPS) {
2711 typeArrayHandle annotations;
2712 if (runtime_visible_annotations != NULL ||
2713 runtime_invisible_annotations != NULL) {
2714 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2715 runtime_invisible_annotations_length, CHECK_(annotations));
2716 annotations = typeArrayHandle(THREAD, anno);
2717 if (runtime_visible_annotations != NULL) {
2718 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2719 }
2720 if (runtime_invisible_annotations != NULL) {
2721 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2722 }
2723 }
2724 return annotations;
2725 }
2728 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2729 Handle class_loader,
2730 Handle protection_domain,
2731 KlassHandle host_klass,
2732 GrowableArray<Handle>* cp_patches,
2733 TempNewSymbol& parsed_name,
2734 bool verify,
2735 TRAPS) {
2736 // When a retransformable agent is attached, JVMTI caches the
2737 // class bytes that existed before the first retransformation.
2738 // If RedefineClasses() was used before the retransformable
2739 // agent attached, then the cached class bytes may not be the
2740 // original class bytes.
2741 unsigned char *cached_class_file_bytes = NULL;
2742 jint cached_class_file_length;
2744 ClassFileStream* cfs = stream();
2745 // Timing
2746 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2747 JavaThread* jt = (JavaThread*) THREAD;
2749 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2750 ClassLoader::perf_class_parse_selftime(),
2751 NULL,
2752 jt->get_thread_stat()->perf_recursion_counts_addr(),
2753 jt->get_thread_stat()->perf_timers_addr(),
2754 PerfClassTraceTime::PARSE_CLASS);
2756 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
2757 _max_bootstrap_specifier_index = -1;
2759 if (JvmtiExport::should_post_class_file_load_hook()) {
2760 // Get the cached class file bytes (if any) from the class that
2761 // is being redefined or retransformed. We use jvmti_thread_state()
2762 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
2763 // a JvmtiThreadState any earlier than necessary. This will help
2764 // avoid the bug described by 7126851.
2765 JvmtiThreadState *state = jt->jvmti_thread_state();
2766 if (state != NULL) {
2767 KlassHandle *h_class_being_redefined =
2768 state->get_class_being_redefined();
2769 if (h_class_being_redefined != NULL) {
2770 instanceKlassHandle ikh_class_being_redefined =
2771 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
2772 cached_class_file_bytes =
2773 ikh_class_being_redefined->get_cached_class_file_bytes();
2774 cached_class_file_length =
2775 ikh_class_being_redefined->get_cached_class_file_len();
2776 }
2777 }
2779 unsigned char* ptr = cfs->buffer();
2780 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2782 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2783 &ptr, &end_ptr,
2784 &cached_class_file_bytes,
2785 &cached_class_file_length);
2787 if (ptr != cfs->buffer()) {
2788 // JVMTI agent has modified class file data.
2789 // Set new class file stream using JVMTI agent modified
2790 // class file data.
2791 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2792 set_stream(cfs);
2793 }
2794 }
2796 _host_klass = host_klass;
2797 _cp_patches = cp_patches;
2799 instanceKlassHandle nullHandle;
2801 // Figure out whether we can skip format checking (matching classic VM behavior)
2802 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2804 // Set the verify flag in stream
2805 cfs->set_verify(_need_verify);
2807 // Save the class file name for easier error message printing.
2808 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2810 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2811 // Magic value
2812 u4 magic = cfs->get_u4_fast();
2813 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2814 "Incompatible magic value %u in class file %s",
2815 magic, CHECK_(nullHandle));
2817 // Version numbers
2818 u2 minor_version = cfs->get_u2_fast();
2819 u2 major_version = cfs->get_u2_fast();
2821 // Check version numbers - we check this even with verifier off
2822 if (!is_supported_version(major_version, minor_version)) {
2823 if (name == NULL) {
2824 Exceptions::fthrow(
2825 THREAD_AND_LOCATION,
2826 vmSymbols::java_lang_UnsupportedClassVersionError(),
2827 "Unsupported major.minor version %u.%u",
2828 major_version,
2829 minor_version);
2830 } else {
2831 ResourceMark rm(THREAD);
2832 Exceptions::fthrow(
2833 THREAD_AND_LOCATION,
2834 vmSymbols::java_lang_UnsupportedClassVersionError(),
2835 "%s : Unsupported major.minor version %u.%u",
2836 name->as_C_string(),
2837 major_version,
2838 minor_version);
2839 }
2840 return nullHandle;
2841 }
2843 _major_version = major_version;
2844 _minor_version = minor_version;
2847 // Check if verification needs to be relaxed for this class file
2848 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
2849 _relax_verify = Verifier::relax_verify_for(class_loader());
2851 // Constant pool
2852 constantPoolHandle cp = parse_constant_pool(class_loader, CHECK_(nullHandle));
2853 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
2855 int cp_size = cp->length();
2857 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
2859 // Access flags
2860 AccessFlags access_flags;
2861 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
2863 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2864 // Set abstract bit for old class files for backward compatibility
2865 flags |= JVM_ACC_ABSTRACT;
2866 }
2867 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
2868 access_flags.set_flags(flags);
2870 // This class and superclass
2871 instanceKlassHandle super_klass;
2872 u2 this_class_index = cfs->get_u2_fast();
2873 check_property(
2874 valid_cp_range(this_class_index, cp_size) &&
2875 cp->tag_at(this_class_index).is_unresolved_klass(),
2876 "Invalid this class index %u in constant pool in class file %s",
2877 this_class_index, CHECK_(nullHandle));
2879 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
2880 assert(class_name != NULL, "class_name can't be null");
2882 // It's important to set parsed_name *before* resolving the super class.
2883 // (it's used for cleanup by the caller if parsing fails)
2884 parsed_name = class_name;
2885 // parsed_name is returned and can be used if there's an error, so add to
2886 // its reference count. Caller will decrement the refcount.
2887 parsed_name->increment_refcount();
2889 // Update _class_name which could be null previously to be class_name
2890 _class_name = class_name;
2892 // Don't need to check whether this class name is legal or not.
2893 // It has been checked when constant pool is parsed.
2894 // However, make sure it is not an array type.
2895 if (_need_verify) {
2896 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
2897 "Bad class name in class file %s",
2898 CHECK_(nullHandle));
2899 }
2901 klassOop preserve_this_klass; // for storing result across HandleMark
2903 // release all handles when parsing is done
2904 { HandleMark hm(THREAD);
2906 // Checks if name in class file matches requested name
2907 if (name != NULL && class_name != name) {
2908 ResourceMark rm(THREAD);
2909 Exceptions::fthrow(
2910 THREAD_AND_LOCATION,
2911 vmSymbols::java_lang_NoClassDefFoundError(),
2912 "%s (wrong name: %s)",
2913 name->as_C_string(),
2914 class_name->as_C_string()
2915 );
2916 return nullHandle;
2917 }
2919 if (TraceClassLoadingPreorder) {
2920 tty->print("[Loading %s", name->as_klass_external_name());
2921 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
2922 tty->print_cr("]");
2923 }
2925 u2 super_class_index = cfs->get_u2_fast();
2926 if (super_class_index == 0) {
2927 check_property(class_name == vmSymbols::java_lang_Object(),
2928 "Invalid superclass index %u in class file %s",
2929 super_class_index,
2930 CHECK_(nullHandle));
2931 } else {
2932 check_property(valid_cp_range(super_class_index, cp_size) &&
2933 is_klass_reference(cp, super_class_index),
2934 "Invalid superclass index %u in class file %s",
2935 super_class_index,
2936 CHECK_(nullHandle));
2937 // The class name should be legal because it is checked when parsing constant pool.
2938 // However, make sure it is not an array type.
2939 bool is_array = false;
2940 if (cp->tag_at(super_class_index).is_klass()) {
2941 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
2942 if (_need_verify)
2943 is_array = super_klass->oop_is_array();
2944 } else if (_need_verify) {
2945 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
2946 }
2947 if (_need_verify) {
2948 guarantee_property(!is_array,
2949 "Bad superclass name in class file %s", CHECK_(nullHandle));
2950 }
2951 }
2953 // Interfaces
2954 u2 itfs_len = cfs->get_u2_fast();
2955 objArrayHandle local_interfaces;
2956 if (itfs_len == 0) {
2957 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2958 } else {
2959 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
2960 }
2962 u2 java_fields_count = 0;
2963 // Fields (offsets are filled in later)
2964 FieldAllocationCount fac;
2965 objArrayHandle fields_annotations;
2966 typeArrayHandle fields = parse_fields(class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
2967 &java_fields_count,
2968 CHECK_(nullHandle));
2969 // Methods
2970 bool has_final_method = false;
2971 AccessFlags promoted_flags;
2972 promoted_flags.set_flags(0);
2973 // These need to be oop pointers because they are allocated lazily
2974 // inside parse_methods inside a nested HandleMark
2975 objArrayOop methods_annotations_oop = NULL;
2976 objArrayOop methods_parameter_annotations_oop = NULL;
2977 objArrayOop methods_default_annotations_oop = NULL;
2978 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
2979 &promoted_flags,
2980 &has_final_method,
2981 &methods_annotations_oop,
2982 &methods_parameter_annotations_oop,
2983 &methods_default_annotations_oop,
2984 CHECK_(nullHandle));
2986 objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
2987 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
2988 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
2990 // We check super class after class file is parsed and format is checked
2991 if (super_class_index > 0 && super_klass.is_null()) {
2992 Symbol* sk = cp->klass_name_at(super_class_index);
2993 if (access_flags.is_interface()) {
2994 // Before attempting to resolve the superclass, check for class format
2995 // errors not checked yet.
2996 guarantee_property(sk == vmSymbols::java_lang_Object(),
2997 "Interfaces must have java.lang.Object as superclass in class file %s",
2998 CHECK_(nullHandle));
2999 }
3000 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
3001 sk,
3002 class_loader,
3003 protection_domain,
3004 true,
3005 CHECK_(nullHandle));
3007 KlassHandle kh (THREAD, k);
3008 super_klass = instanceKlassHandle(THREAD, kh());
3009 if (LinkWellKnownClasses) // my super class is well known to me
3010 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
3011 }
3012 if (super_klass.not_null()) {
3013 if (super_klass->is_interface()) {
3014 ResourceMark rm(THREAD);
3015 Exceptions::fthrow(
3016 THREAD_AND_LOCATION,
3017 vmSymbols::java_lang_IncompatibleClassChangeError(),
3018 "class %s has interface %s as super class",
3019 class_name->as_klass_external_name(),
3020 super_klass->external_name()
3021 );
3022 return nullHandle;
3023 }
3024 // Make sure super class is not final
3025 if (super_klass->is_final()) {
3026 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3027 }
3028 }
3030 // Compute the transitive list of all unique interfaces implemented by this class
3031 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
3033 // sort methods
3034 typeArrayHandle method_ordering = sort_methods(methods,
3035 methods_annotations,
3036 methods_parameter_annotations,
3037 methods_default_annotations,
3038 CHECK_(nullHandle));
3040 // promote flags from parse_methods() to the klass' flags
3041 access_flags.add_promoted_flags(promoted_flags.as_int());
3043 // Size of Java vtable (in words)
3044 int vtable_size = 0;
3045 int itable_size = 0;
3046 int num_miranda_methods = 0;
3048 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3049 num_miranda_methods,
3050 super_klass(),
3051 methods(),
3052 access_flags,
3053 class_loader,
3054 class_name,
3055 local_interfaces(),
3056 CHECK_(nullHandle));
3058 // Size of Java itable (in words)
3059 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3061 // Field size and offset computation
3062 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3063 #ifndef PRODUCT
3064 int orig_nonstatic_field_size = 0;
3065 #endif
3066 int static_field_size = 0;
3067 int next_static_oop_offset;
3068 int next_static_double_offset;
3069 int next_static_word_offset;
3070 int next_static_short_offset;
3071 int next_static_byte_offset;
3072 int next_static_type_offset;
3073 int next_nonstatic_oop_offset;
3074 int next_nonstatic_double_offset;
3075 int next_nonstatic_word_offset;
3076 int next_nonstatic_short_offset;
3077 int next_nonstatic_byte_offset;
3078 int next_nonstatic_type_offset;
3079 int first_nonstatic_oop_offset;
3080 int first_nonstatic_field_offset;
3081 int next_nonstatic_field_offset;
3083 // Calculate the starting byte offsets
3084 next_static_oop_offset = instanceMirrorKlass::offset_of_static_fields();
3085 next_static_double_offset = next_static_oop_offset +
3086 (fac.count[STATIC_OOP] * heapOopSize);
3087 if ( fac.count[STATIC_DOUBLE] &&
3088 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3089 Universe::field_type_should_be_aligned(T_LONG)) ) {
3090 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3091 }
3093 next_static_word_offset = next_static_double_offset +
3094 (fac.count[STATIC_DOUBLE] * BytesPerLong);
3095 next_static_short_offset = next_static_word_offset +
3096 (fac.count[STATIC_WORD] * BytesPerInt);
3097 next_static_byte_offset = next_static_short_offset +
3098 (fac.count[STATIC_SHORT] * BytesPerShort);
3099 next_static_type_offset = align_size_up((next_static_byte_offset +
3100 fac.count[STATIC_BYTE] ), wordSize );
3101 static_field_size = (next_static_type_offset -
3102 next_static_oop_offset) / wordSize;
3104 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3105 nonstatic_field_size * heapOopSize;
3106 next_nonstatic_field_offset = first_nonstatic_field_offset;
3108 unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3109 unsigned int nonstatic_word_count = fac.count[NONSTATIC_WORD];
3110 unsigned int nonstatic_short_count = fac.count[NONSTATIC_SHORT];
3111 unsigned int nonstatic_byte_count = fac.count[NONSTATIC_BYTE];
3112 unsigned int nonstatic_oop_count = fac.count[NONSTATIC_OOP];
3114 bool super_has_nonstatic_fields =
3115 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3116 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3117 ((nonstatic_double_count + nonstatic_word_count +
3118 nonstatic_short_count + nonstatic_byte_count +
3119 nonstatic_oop_count) != 0);
3122 // Prepare list of oops for oop map generation.
3123 int* nonstatic_oop_offsets;
3124 unsigned int* nonstatic_oop_counts;
3125 unsigned int nonstatic_oop_map_count = 0;
3127 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3128 THREAD, int, nonstatic_oop_count + 1);
3129 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3130 THREAD, unsigned int, nonstatic_oop_count + 1);
3132 first_nonstatic_oop_offset = 0; // will be set for first oop field
3134 #ifndef PRODUCT
3135 if( PrintCompactFieldsSavings ) {
3136 next_nonstatic_double_offset = next_nonstatic_field_offset +
3137 (nonstatic_oop_count * heapOopSize);
3138 if ( nonstatic_double_count > 0 ) {
3139 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3140 }
3141 next_nonstatic_word_offset = next_nonstatic_double_offset +
3142 (nonstatic_double_count * BytesPerLong);
3143 next_nonstatic_short_offset = next_nonstatic_word_offset +
3144 (nonstatic_word_count * BytesPerInt);
3145 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3146 (nonstatic_short_count * BytesPerShort);
3147 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3148 nonstatic_byte_count ), heapOopSize );
3149 orig_nonstatic_field_size = nonstatic_field_size +
3150 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3151 }
3152 #endif
3153 bool compact_fields = CompactFields;
3154 int allocation_style = FieldsAllocationStyle;
3155 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3156 assert(false, "0 <= FieldsAllocationStyle <= 2");
3157 allocation_style = 1; // Optimistic
3158 }
3160 // The next classes have predefined hard-coded fields offsets
3161 // (see in JavaClasses::compute_hard_coded_offsets()).
3162 // Use default fields allocation order for them.
3163 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3164 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3165 class_name == vmSymbols::java_lang_Class() ||
3166 class_name == vmSymbols::java_lang_ClassLoader() ||
3167 class_name == vmSymbols::java_lang_ref_Reference() ||
3168 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3169 class_name == vmSymbols::java_lang_StackTraceElement() ||
3170 class_name == vmSymbols::java_lang_String() ||
3171 class_name == vmSymbols::java_lang_Throwable() ||
3172 class_name == vmSymbols::java_lang_Boolean() ||
3173 class_name == vmSymbols::java_lang_Character() ||
3174 class_name == vmSymbols::java_lang_Float() ||
3175 class_name == vmSymbols::java_lang_Double() ||
3176 class_name == vmSymbols::java_lang_Byte() ||
3177 class_name == vmSymbols::java_lang_Short() ||
3178 class_name == vmSymbols::java_lang_Integer() ||
3179 class_name == vmSymbols::java_lang_Long())) {
3180 allocation_style = 0; // Allocate oops first
3181 compact_fields = false; // Don't compact fields
3182 }
3184 if( allocation_style == 0 ) {
3185 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3186 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3187 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3188 (nonstatic_oop_count * heapOopSize);
3189 } else if( allocation_style == 1 ) {
3190 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3191 next_nonstatic_double_offset = next_nonstatic_field_offset;
3192 } else if( allocation_style == 2 ) {
3193 // Fields allocation: oops fields in super and sub classes are together.
3194 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3195 super_klass->nonstatic_oop_map_size() > 0 ) {
3196 int map_count = super_klass->nonstatic_oop_map_count();
3197 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3198 OopMapBlock* last_map = first_map + map_count - 1;
3199 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3200 if (next_offset == next_nonstatic_field_offset) {
3201 allocation_style = 0; // allocate oops first
3202 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3203 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3204 (nonstatic_oop_count * heapOopSize);
3205 }
3206 }
3207 if( allocation_style == 2 ) {
3208 allocation_style = 1; // allocate oops last
3209 next_nonstatic_double_offset = next_nonstatic_field_offset;
3210 }
3211 } else {
3212 ShouldNotReachHere();
3213 }
3215 int nonstatic_oop_space_count = 0;
3216 int nonstatic_word_space_count = 0;
3217 int nonstatic_short_space_count = 0;
3218 int nonstatic_byte_space_count = 0;
3219 int nonstatic_oop_space_offset;
3220 int nonstatic_word_space_offset;
3221 int nonstatic_short_space_offset;
3222 int nonstatic_byte_space_offset;
3224 if( nonstatic_double_count > 0 ) {
3225 int offset = next_nonstatic_double_offset;
3226 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3227 if( compact_fields && offset != next_nonstatic_double_offset ) {
3228 // Allocate available fields into the gap before double field.
3229 int length = next_nonstatic_double_offset - offset;
3230 assert(length == BytesPerInt, "");
3231 nonstatic_word_space_offset = offset;
3232 if( nonstatic_word_count > 0 ) {
3233 nonstatic_word_count -= 1;
3234 nonstatic_word_space_count = 1; // Only one will fit
3235 length -= BytesPerInt;
3236 offset += BytesPerInt;
3237 }
3238 nonstatic_short_space_offset = offset;
3239 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3240 nonstatic_short_count -= 1;
3241 nonstatic_short_space_count += 1;
3242 length -= BytesPerShort;
3243 offset += BytesPerShort;
3244 }
3245 nonstatic_byte_space_offset = offset;
3246 while( length > 0 && nonstatic_byte_count > 0 ) {
3247 nonstatic_byte_count -= 1;
3248 nonstatic_byte_space_count += 1;
3249 length -= 1;
3250 }
3251 // Allocate oop field in the gap if there are no other fields for that.
3252 nonstatic_oop_space_offset = offset;
3253 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3254 allocation_style != 0 ) { // when oop fields not first
3255 nonstatic_oop_count -= 1;
3256 nonstatic_oop_space_count = 1; // Only one will fit
3257 length -= heapOopSize;
3258 offset += heapOopSize;
3259 }
3260 }
3261 }
3263 next_nonstatic_word_offset = next_nonstatic_double_offset +
3264 (nonstatic_double_count * BytesPerLong);
3265 next_nonstatic_short_offset = next_nonstatic_word_offset +
3266 (nonstatic_word_count * BytesPerInt);
3267 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3268 (nonstatic_short_count * BytesPerShort);
3270 int notaligned_offset;
3271 if( allocation_style == 0 ) {
3272 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3273 } else { // allocation_style == 1
3274 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3275 if( nonstatic_oop_count > 0 ) {
3276 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3277 }
3278 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3279 }
3280 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3281 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3282 - first_nonstatic_field_offset)/heapOopSize);
3284 // Iterate over fields again and compute correct offsets.
3285 // The field allocation type was temporarily stored in the offset slot.
3286 // oop fields are located before non-oop fields (static and non-static).
3287 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3288 int real_offset;
3289 FieldAllocationType atype = (FieldAllocationType) fs.offset();
3290 switch (atype) {
3291 case STATIC_OOP:
3292 real_offset = next_static_oop_offset;
3293 next_static_oop_offset += heapOopSize;
3294 break;
3295 case STATIC_BYTE:
3296 real_offset = next_static_byte_offset;
3297 next_static_byte_offset += 1;
3298 break;
3299 case STATIC_SHORT:
3300 real_offset = next_static_short_offset;
3301 next_static_short_offset += BytesPerShort;
3302 break;
3303 case STATIC_WORD:
3304 real_offset = next_static_word_offset;
3305 next_static_word_offset += BytesPerInt;
3306 break;
3307 case STATIC_DOUBLE:
3308 real_offset = next_static_double_offset;
3309 next_static_double_offset += BytesPerLong;
3310 break;
3311 case NONSTATIC_OOP:
3312 if( nonstatic_oop_space_count > 0 ) {
3313 real_offset = nonstatic_oop_space_offset;
3314 nonstatic_oop_space_offset += heapOopSize;
3315 nonstatic_oop_space_count -= 1;
3316 } else {
3317 real_offset = next_nonstatic_oop_offset;
3318 next_nonstatic_oop_offset += heapOopSize;
3319 }
3320 // Update oop maps
3321 if( nonstatic_oop_map_count > 0 &&
3322 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3323 real_offset -
3324 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3325 heapOopSize ) {
3326 // Extend current oop map
3327 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3328 } else {
3329 // Create new oop map
3330 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3331 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3332 nonstatic_oop_map_count += 1;
3333 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3334 first_nonstatic_oop_offset = real_offset;
3335 }
3336 }
3337 break;
3338 case NONSTATIC_BYTE:
3339 if( nonstatic_byte_space_count > 0 ) {
3340 real_offset = nonstatic_byte_space_offset;
3341 nonstatic_byte_space_offset += 1;
3342 nonstatic_byte_space_count -= 1;
3343 } else {
3344 real_offset = next_nonstatic_byte_offset;
3345 next_nonstatic_byte_offset += 1;
3346 }
3347 break;
3348 case NONSTATIC_SHORT:
3349 if( nonstatic_short_space_count > 0 ) {
3350 real_offset = nonstatic_short_space_offset;
3351 nonstatic_short_space_offset += BytesPerShort;
3352 nonstatic_short_space_count -= 1;
3353 } else {
3354 real_offset = next_nonstatic_short_offset;
3355 next_nonstatic_short_offset += BytesPerShort;
3356 }
3357 break;
3358 case NONSTATIC_WORD:
3359 if( nonstatic_word_space_count > 0 ) {
3360 real_offset = nonstatic_word_space_offset;
3361 nonstatic_word_space_offset += BytesPerInt;
3362 nonstatic_word_space_count -= 1;
3363 } else {
3364 real_offset = next_nonstatic_word_offset;
3365 next_nonstatic_word_offset += BytesPerInt;
3366 }
3367 break;
3368 case NONSTATIC_DOUBLE:
3369 real_offset = next_nonstatic_double_offset;
3370 next_nonstatic_double_offset += BytesPerLong;
3371 break;
3372 default:
3373 ShouldNotReachHere();
3374 }
3375 fs.set_offset(real_offset);
3376 }
3378 // Size of instances
3379 int instance_size;
3381 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3382 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3384 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3386 // Number of non-static oop map blocks allocated at end of klass.
3387 const unsigned int total_oop_map_count =
3388 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3389 first_nonstatic_oop_offset);
3391 // Compute reference type
3392 ReferenceType rt;
3393 if (super_klass() == NULL) {
3394 rt = REF_NONE;
3395 } else {
3396 rt = super_klass->reference_type();
3397 }
3399 // We can now create the basic klassOop for this klass
3400 klassOop ik = oopFactory::new_instanceKlass(name, vtable_size, itable_size,
3401 static_field_size,
3402 total_oop_map_count,
3403 access_flags,
3404 rt, host_klass,
3405 CHECK_(nullHandle));
3406 instanceKlassHandle this_klass (THREAD, ik);
3408 assert(this_klass->static_field_size() == static_field_size, "sanity");
3409 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3410 "sanity");
3412 // Fill in information already parsed
3413 this_klass->set_should_verify_class(verify);
3414 jint lh = Klass::instance_layout_helper(instance_size, false);
3415 this_klass->set_layout_helper(lh);
3416 assert(this_klass->oop_is_instance(), "layout is correct");
3417 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3418 // Not yet: supers are done below to support the new subtype-checking fields
3419 //this_klass->set_super(super_klass());
3420 this_klass->set_class_loader(class_loader());
3421 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3422 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3423 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3424 cp->set_pool_holder(this_klass());
3425 error_handler.set_in_error(false); // turn off error handler for cp
3426 this_klass->set_constants(cp());
3427 this_klass->set_local_interfaces(local_interfaces());
3428 this_klass->set_fields(fields(), java_fields_count);
3429 this_klass->set_methods(methods());
3430 if (has_final_method) {
3431 this_klass->set_has_final_method();
3432 }
3433 this_klass->set_method_ordering(method_ordering());
3434 // The instanceKlass::_methods_jmethod_ids cache and the
3435 // instanceKlass::_methods_cached_itable_indices cache are
3436 // both managed on the assumption that the initial cache
3437 // size is equal to the number of methods in the class. If
3438 // that changes, then instanceKlass::idnum_can_increment()
3439 // has to be changed accordingly.
3440 this_klass->set_initial_method_idnum(methods->length());
3441 this_klass->set_name(cp->klass_name_at(this_class_index));
3442 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself
3443 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3444 this_klass->set_protection_domain(protection_domain());
3445 this_klass->set_fields_annotations(fields_annotations());
3446 this_klass->set_methods_annotations(methods_annotations());
3447 this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3448 this_klass->set_methods_default_annotations(methods_default_annotations());
3450 this_klass->set_minor_version(minor_version);
3451 this_klass->set_major_version(major_version);
3453 // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3454 // (We used to do this lazily, but now we query it in Rewriter,
3455 // which is eagerly done for every method, so we might as well do it now,
3456 // when everything is fresh in memory.)
3457 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3458 for (int j = 0; j < methods->length(); j++) {
3459 ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3460 }
3461 }
3463 if (cached_class_file_bytes != NULL) {
3464 // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3465 this_klass->set_cached_class_file(cached_class_file_bytes,
3466 cached_class_file_length);
3467 }
3469 // Miranda methods
3470 if ((num_miranda_methods > 0) ||
3471 // if this class introduced new miranda methods or
3472 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3473 // super class exists and this class inherited miranda methods
3474 ) {
3475 this_klass->set_has_miranda_methods(); // then set a flag
3476 }
3478 // Additional attributes
3479 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
3481 // Make sure this is the end of class file stream
3482 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3484 // VerifyOops believes that once this has been set, the object is completely loaded.
3485 // Compute transitive closure of interfaces this class implements
3486 this_klass->set_transitive_interfaces(transitive_interfaces());
3488 // Fill in information needed to compute superclasses.
3489 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3491 // Initialize itable offset tables
3492 klassItable::setup_itable_offset_table(this_klass);
3494 // Do final class setup
3495 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3497 set_precomputed_flags(this_klass);
3499 // reinitialize modifiers, using the InnerClasses attribute
3500 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3501 this_klass->set_modifier_flags(computed_modifiers);
3503 // check if this class can access its super class
3504 check_super_class_access(this_klass, CHECK_(nullHandle));
3506 // check if this class can access its superinterfaces
3507 check_super_interface_access(this_klass, CHECK_(nullHandle));
3509 // check if this class overrides any final method
3510 check_final_method_override(this_klass, CHECK_(nullHandle));
3512 // check that if this class is an interface then it doesn't have static methods
3513 if (this_klass->is_interface()) {
3514 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3515 }
3517 // Allocate mirror and initialize static fields
3518 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3520 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3521 false /* not shared class */);
3523 if (TraceClassLoading) {
3524 // print in a single call to reduce interleaving of output
3525 if (cfs->source() != NULL) {
3526 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3527 cfs->source());
3528 } else if (class_loader.is_null()) {
3529 if (THREAD->is_Java_thread()) {
3530 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3531 tty->print("[Loaded %s by instance of %s]\n",
3532 this_klass->external_name(),
3533 instanceKlass::cast(caller)->external_name());
3534 } else {
3535 tty->print("[Loaded %s]\n", this_klass->external_name());
3536 }
3537 } else {
3538 ResourceMark rm;
3539 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3540 instanceKlass::cast(class_loader->klass())->external_name());
3541 }
3542 }
3544 if (TraceClassResolution) {
3545 // print out the superclass.
3546 const char * from = Klass::cast(this_klass())->external_name();
3547 if (this_klass->java_super() != NULL) {
3548 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3549 }
3550 // print out each of the interface classes referred to by this class.
3551 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3552 if (!local_interfaces.is_null()) {
3553 int length = local_interfaces->length();
3554 for (int i = 0; i < length; i++) {
3555 klassOop k = klassOop(local_interfaces->obj_at(i));
3556 instanceKlass* to_class = instanceKlass::cast(k);
3557 const char * to = to_class->external_name();
3558 tty->print("RESOLVE %s %s (interface)\n", from, to);
3559 }
3560 }
3561 }
3563 #ifndef PRODUCT
3564 if( PrintCompactFieldsSavings ) {
3565 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3566 tty->print("[Saved %d of %d bytes in %s]\n",
3567 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3568 orig_nonstatic_field_size*heapOopSize,
3569 this_klass->external_name());
3570 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3571 tty->print("[Wasted %d over %d bytes in %s]\n",
3572 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3573 orig_nonstatic_field_size*heapOopSize,
3574 this_klass->external_name());
3575 }
3576 }
3577 #endif
3579 // preserve result across HandleMark
3580 preserve_this_klass = this_klass();
3581 }
3583 // Create new handle outside HandleMark
3584 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3585 debug_only(this_klass->as_klassOop()->verify();)
3587 return this_klass;
3588 }
3591 unsigned int
3592 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3593 unsigned int nonstatic_oop_map_count,
3594 int first_nonstatic_oop_offset) {
3595 unsigned int map_count =
3596 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3597 if (nonstatic_oop_map_count > 0) {
3598 // We have oops to add to map
3599 if (map_count == 0) {
3600 map_count = nonstatic_oop_map_count;
3601 } else {
3602 // Check whether we should add a new map block or whether the last one can
3603 // be extended
3604 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3605 OopMapBlock* const last_map = first_map + map_count - 1;
3607 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3608 if (next_offset == first_nonstatic_oop_offset) {
3609 // There is no gap bettwen superklass's last oop field and first
3610 // local oop field, merge maps.
3611 nonstatic_oop_map_count -= 1;
3612 } else {
3613 // Superklass didn't end with a oop field, add extra maps
3614 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3615 }
3616 map_count += nonstatic_oop_map_count;
3617 }
3618 }
3619 return map_count;
3620 }
3623 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3624 unsigned int nonstatic_oop_map_count,
3625 int* nonstatic_oop_offsets,
3626 unsigned int* nonstatic_oop_counts) {
3627 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3628 const instanceKlass* const super = k->superklass();
3629 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3630 if (super_count > 0) {
3631 // Copy maps from superklass
3632 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3633 for (unsigned int i = 0; i < super_count; ++i) {
3634 *this_oop_map++ = *super_oop_map++;
3635 }
3636 }
3638 if (nonstatic_oop_map_count > 0) {
3639 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3640 // The counts differ because there is no gap between superklass's last oop
3641 // field and the first local oop field. Extend the last oop map copied
3642 // from the superklass instead of creating new one.
3643 nonstatic_oop_map_count--;
3644 nonstatic_oop_offsets++;
3645 this_oop_map--;
3646 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3647 this_oop_map++;
3648 }
3650 // Add new map blocks, fill them
3651 while (nonstatic_oop_map_count-- > 0) {
3652 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3653 this_oop_map->set_count(*nonstatic_oop_counts++);
3654 this_oop_map++;
3655 }
3656 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3657 this_oop_map, "sanity");
3658 }
3659 }
3662 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3663 klassOop super = k->super();
3665 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3666 // in which case we don't have to register objects as finalizable
3667 if (!_has_empty_finalizer) {
3668 if (_has_finalizer ||
3669 (super != NULL && super->klass_part()->has_finalizer())) {
3670 k->set_has_finalizer();
3671 }
3672 }
3674 #ifdef ASSERT
3675 bool f = false;
3676 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3677 vmSymbols::void_method_signature());
3678 if (m != NULL && !m->is_empty_method()) {
3679 f = true;
3680 }
3681 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3682 #endif
3684 // Check if this klass supports the java.lang.Cloneable interface
3685 if (SystemDictionary::Cloneable_klass_loaded()) {
3686 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3687 k->set_is_cloneable();
3688 }
3689 }
3691 // Check if this klass has a vanilla default constructor
3692 if (super == NULL) {
3693 // java.lang.Object has empty default constructor
3694 k->set_has_vanilla_constructor();
3695 } else {
3696 if (Klass::cast(super)->has_vanilla_constructor() &&
3697 _has_vanilla_constructor) {
3698 k->set_has_vanilla_constructor();
3699 }
3700 #ifdef ASSERT
3701 bool v = false;
3702 if (Klass::cast(super)->has_vanilla_constructor()) {
3703 methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3704 ), vmSymbols::void_method_signature());
3705 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3706 v = true;
3707 }
3708 }
3709 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3710 #endif
3711 }
3713 // If it cannot be fast-path allocated, set a bit in the layout helper.
3714 // See documentation of instanceKlass::can_be_fastpath_allocated().
3715 assert(k->size_helper() > 0, "layout_helper is initialized");
3716 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3717 || k->is_abstract() || k->is_interface()
3718 || (k->name() == vmSymbols::java_lang_Class()
3719 && k->class_loader() == NULL)
3720 || k->size_helper() >= FastAllocateSizeLimit) {
3721 // Forbid fast-path allocation.
3722 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3723 k->set_layout_helper(lh);
3724 }
3725 }
3728 // utility method for appending and array with check for duplicates
3730 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3731 // iterate over new interfaces
3732 for (int i = 0; i < ifs->length(); i++) {
3733 oop e = ifs->obj_at(i);
3734 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3735 // check for duplicates
3736 bool duplicate = false;
3737 for (int j = 0; j < index; j++) {
3738 if (result->obj_at(j) == e) {
3739 duplicate = true;
3740 break;
3741 }
3742 }
3743 // add new interface
3744 if (!duplicate) {
3745 result->obj_at_put(index++, e);
3746 }
3747 }
3748 }
3750 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3751 // Compute maximum size for transitive interfaces
3752 int max_transitive_size = 0;
3753 int super_size = 0;
3754 // Add superclass transitive interfaces size
3755 if (super.not_null()) {
3756 super_size = super->transitive_interfaces()->length();
3757 max_transitive_size += super_size;
3758 }
3759 // Add local interfaces' super interfaces
3760 int local_size = local_ifs->length();
3761 for (int i = 0; i < local_size; i++) {
3762 klassOop l = klassOop(local_ifs->obj_at(i));
3763 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3764 }
3765 // Finally add local interfaces
3766 max_transitive_size += local_size;
3767 // Construct array
3768 objArrayHandle result;
3769 if (max_transitive_size == 0) {
3770 // no interfaces, use canonicalized array
3771 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3772 } else if (max_transitive_size == super_size) {
3773 // no new local interfaces added, share superklass' transitive interface array
3774 result = objArrayHandle(THREAD, super->transitive_interfaces());
3775 } else if (max_transitive_size == local_size) {
3776 // only local interfaces added, share local interface array
3777 result = local_ifs;
3778 } else {
3779 objArrayHandle nullHandle;
3780 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3781 result = objArrayHandle(THREAD, new_objarray);
3782 int index = 0;
3783 // Copy down from superclass
3784 if (super.not_null()) {
3785 append_interfaces(result, index, super->transitive_interfaces());
3786 }
3787 // Copy down from local interfaces' superinterfaces
3788 for (int i = 0; i < local_ifs->length(); i++) {
3789 klassOop l = klassOop(local_ifs->obj_at(i));
3790 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3791 }
3792 // Finally add local interfaces
3793 append_interfaces(result, index, local_ifs());
3795 // Check if duplicates were removed
3796 if (index != max_transitive_size) {
3797 assert(index < max_transitive_size, "just checking");
3798 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3799 for (int i = 0; i < index; i++) {
3800 oop e = result->obj_at(i);
3801 assert(e != NULL, "just checking");
3802 new_result->obj_at_put(i, e);
3803 }
3804 result = objArrayHandle(THREAD, new_result);
3805 }
3806 }
3807 return result;
3808 }
3811 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3812 klassOop super = this_klass->super();
3813 if ((super != NULL) &&
3814 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3815 ResourceMark rm(THREAD);
3816 Exceptions::fthrow(
3817 THREAD_AND_LOCATION,
3818 vmSymbols::java_lang_IllegalAccessError(),
3819 "class %s cannot access its superclass %s",
3820 this_klass->external_name(),
3821 instanceKlass::cast(super)->external_name()
3822 );
3823 return;
3824 }
3825 }
3828 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
3829 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
3830 int lng = local_interfaces->length();
3831 for (int i = lng - 1; i >= 0; i--) {
3832 klassOop k = klassOop(local_interfaces->obj_at(i));
3833 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
3834 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
3835 ResourceMark rm(THREAD);
3836 Exceptions::fthrow(
3837 THREAD_AND_LOCATION,
3838 vmSymbols::java_lang_IllegalAccessError(),
3839 "class %s cannot access its superinterface %s",
3840 this_klass->external_name(),
3841 instanceKlass::cast(k)->external_name()
3842 );
3843 return;
3844 }
3845 }
3846 }
3849 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
3850 objArrayHandle methods (THREAD, this_klass->methods());
3851 int num_methods = methods->length();
3853 // go thru each method and check if it overrides a final method
3854 for (int index = 0; index < num_methods; index++) {
3855 methodOop m = (methodOop)methods->obj_at(index);
3857 // skip private, static and <init> methods
3858 if ((!m->is_private()) &&
3859 (!m->is_static()) &&
3860 (m->name() != vmSymbols::object_initializer_name())) {
3862 Symbol* name = m->name();
3863 Symbol* signature = m->signature();
3864 klassOop k = this_klass->super();
3865 methodOop super_m = NULL;
3866 while (k != NULL) {
3867 // skip supers that don't have final methods.
3868 if (k->klass_part()->has_final_method()) {
3869 // lookup a matching method in the super class hierarchy
3870 super_m = instanceKlass::cast(k)->lookup_method(name, signature);
3871 if (super_m == NULL) {
3872 break; // didn't find any match; get out
3873 }
3875 if (super_m->is_final() &&
3876 // matching method in super is final
3877 (Reflection::verify_field_access(this_klass->as_klassOop(),
3878 super_m->method_holder(),
3879 super_m->method_holder(),
3880 super_m->access_flags(), false))
3881 // this class can access super final method and therefore override
3882 ) {
3883 ResourceMark rm(THREAD);
3884 Exceptions::fthrow(
3885 THREAD_AND_LOCATION,
3886 vmSymbols::java_lang_VerifyError(),
3887 "class %s overrides final method %s.%s",
3888 this_klass->external_name(),
3889 name->as_C_string(),
3890 signature->as_C_string()
3891 );
3892 return;
3893 }
3895 // continue to look from super_m's holder's super.
3896 k = instanceKlass::cast(super_m->method_holder())->super();
3897 continue;
3898 }
3900 k = k->klass_part()->super();
3901 }
3902 }
3903 }
3904 }
3907 // assumes that this_klass is an interface
3908 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
3909 assert(this_klass->is_interface(), "not an interface");
3910 objArrayHandle methods (THREAD, this_klass->methods());
3911 int num_methods = methods->length();
3913 for (int index = 0; index < num_methods; index++) {
3914 methodOop m = (methodOop)methods->obj_at(index);
3915 // if m is static and not the init method, throw a verify error
3916 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
3917 ResourceMark rm(THREAD);
3918 Exceptions::fthrow(
3919 THREAD_AND_LOCATION,
3920 vmSymbols::java_lang_VerifyError(),
3921 "Illegal static method %s in interface %s",
3922 m->name()->as_C_string(),
3923 this_klass->external_name()
3924 );
3925 return;
3926 }
3927 }
3928 }
3930 // utility methods for format checking
3932 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
3933 if (!_need_verify) { return; }
3935 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
3936 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
3937 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
3938 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
3939 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
3940 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
3941 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
3943 if ((is_abstract && is_final) ||
3944 (is_interface && !is_abstract) ||
3945 (is_interface && major_gte_15 && (is_super || is_enum)) ||
3946 (!is_interface && major_gte_15 && is_annotation)) {
3947 ResourceMark rm(THREAD);
3948 Exceptions::fthrow(
3949 THREAD_AND_LOCATION,
3950 vmSymbols::java_lang_ClassFormatError(),
3951 "Illegal class modifiers in class %s: 0x%X",
3952 _class_name->as_C_string(), flags
3953 );
3954 return;
3955 }
3956 }
3958 bool ClassFileParser::has_illegal_visibility(jint flags) {
3959 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
3960 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3961 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
3963 return ((is_public && is_protected) ||
3964 (is_public && is_private) ||
3965 (is_protected && is_private));
3966 }
3968 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
3969 u2 max_version =
3970 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
3971 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
3972 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
3973 (major <= max_version) &&
3974 ((major != max_version) ||
3975 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
3976 }
3978 void ClassFileParser::verify_legal_field_modifiers(
3979 jint flags, bool is_interface, TRAPS) {
3980 if (!_need_verify) { return; }
3982 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
3983 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3984 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
3985 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
3986 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
3987 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
3988 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
3989 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
3990 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
3992 bool is_illegal = false;
3994 if (is_interface) {
3995 if (!is_public || !is_static || !is_final || is_private ||
3996 is_protected || is_volatile || is_transient ||
3997 (major_gte_15 && is_enum)) {
3998 is_illegal = true;
3999 }
4000 } else { // not interface
4001 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4002 is_illegal = true;
4003 }
4004 }
4006 if (is_illegal) {
4007 ResourceMark rm(THREAD);
4008 Exceptions::fthrow(
4009 THREAD_AND_LOCATION,
4010 vmSymbols::java_lang_ClassFormatError(),
4011 "Illegal field modifiers in class %s: 0x%X",
4012 _class_name->as_C_string(), flags);
4013 return;
4014 }
4015 }
4017 void ClassFileParser::verify_legal_method_modifiers(
4018 jint flags, bool is_interface, Symbol* name, TRAPS) {
4019 if (!_need_verify) { return; }
4021 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4022 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4023 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4024 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4025 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4026 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4027 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4028 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4029 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4030 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4031 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4033 bool is_illegal = false;
4035 if (is_interface) {
4036 if (!is_abstract || !is_public || is_static || is_final ||
4037 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4038 is_illegal = true;
4039 }
4040 } else { // not interface
4041 if (is_initializer) {
4042 if (is_static || is_final || is_synchronized || is_native ||
4043 is_abstract || (major_gte_15 && is_bridge)) {
4044 is_illegal = true;
4045 }
4046 } else { // not initializer
4047 if (is_abstract) {
4048 if ((is_final || is_native || is_private || is_static ||
4049 (major_gte_15 && (is_synchronized || is_strict)))) {
4050 is_illegal = true;
4051 }
4052 }
4053 if (has_illegal_visibility(flags)) {
4054 is_illegal = true;
4055 }
4056 }
4057 }
4059 if (is_illegal) {
4060 ResourceMark rm(THREAD);
4061 Exceptions::fthrow(
4062 THREAD_AND_LOCATION,
4063 vmSymbols::java_lang_ClassFormatError(),
4064 "Method %s in class %s has illegal modifiers: 0x%X",
4065 name->as_C_string(), _class_name->as_C_string(), flags);
4066 return;
4067 }
4068 }
4070 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4071 assert(_need_verify, "only called when _need_verify is true");
4072 int i = 0;
4073 int count = length >> 2;
4074 for (int k=0; k<count; k++) {
4075 unsigned char b0 = buffer[i];
4076 unsigned char b1 = buffer[i+1];
4077 unsigned char b2 = buffer[i+2];
4078 unsigned char b3 = buffer[i+3];
4079 // For an unsigned char v,
4080 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4081 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4082 unsigned char res = b0 | b0 - 1 |
4083 b1 | b1 - 1 |
4084 b2 | b2 - 1 |
4085 b3 | b3 - 1;
4086 if (res >= 128) break;
4087 i += 4;
4088 }
4089 for(; i < length; i++) {
4090 unsigned short c;
4091 // no embedded zeros
4092 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4093 if(buffer[i] < 128) {
4094 continue;
4095 }
4096 if ((i + 5) < length) { // see if it's legal supplementary character
4097 if (UTF8::is_supplementary_character(&buffer[i])) {
4098 c = UTF8::get_supplementary_character(&buffer[i]);
4099 i += 5;
4100 continue;
4101 }
4102 }
4103 switch (buffer[i] >> 4) {
4104 default: break;
4105 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4106 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4107 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4108 c = (buffer[i] & 0x1F) << 6;
4109 i++;
4110 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4111 c += buffer[i] & 0x3F;
4112 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4113 // for classes with major > 47, c must a null or a character in its shortest form
4114 break;
4115 }
4116 }
4117 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4118 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4119 c = (buffer[i] & 0xF) << 12;
4120 i += 2;
4121 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4122 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4123 if (_major_version <= 47 || c >= 0x800) {
4124 // for classes with major > 47, c must be in its shortest form
4125 break;
4126 }
4127 }
4128 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4129 } // end of switch
4130 } // end of for
4131 }
4133 // Checks if name is a legal class name.
4134 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4135 if (!_need_verify || _relax_verify) { return; }
4137 char buf[fixed_buffer_size];
4138 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4139 unsigned int length = name->utf8_length();
4140 bool legal = false;
4142 if (length > 0) {
4143 char* p;
4144 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4145 p = skip_over_field_signature(bytes, false, length, CHECK);
4146 legal = (p != NULL) && ((p - bytes) == (int)length);
4147 } else if (_major_version < JAVA_1_5_VERSION) {
4148 if (bytes[0] != '<') {
4149 p = skip_over_field_name(bytes, true, length);
4150 legal = (p != NULL) && ((p - bytes) == (int)length);
4151 }
4152 } else {
4153 // 4900761: relax the constraints based on JSR202 spec
4154 // Class names may be drawn from the entire Unicode character set.
4155 // Identifiers between '/' must be unqualified names.
4156 // The utf8 string has been verified when parsing cpool entries.
4157 legal = verify_unqualified_name(bytes, length, LegalClass);
4158 }
4159 }
4160 if (!legal) {
4161 ResourceMark rm(THREAD);
4162 Exceptions::fthrow(
4163 THREAD_AND_LOCATION,
4164 vmSymbols::java_lang_ClassFormatError(),
4165 "Illegal class name \"%s\" in class file %s", bytes,
4166 _class_name->as_C_string()
4167 );
4168 return;
4169 }
4170 }
4172 // Checks if name is a legal field name.
4173 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4174 if (!_need_verify || _relax_verify) { return; }
4176 char buf[fixed_buffer_size];
4177 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4178 unsigned int length = name->utf8_length();
4179 bool legal = false;
4181 if (length > 0) {
4182 if (_major_version < JAVA_1_5_VERSION) {
4183 if (bytes[0] != '<') {
4184 char* p = skip_over_field_name(bytes, false, length);
4185 legal = (p != NULL) && ((p - bytes) == (int)length);
4186 }
4187 } else {
4188 // 4881221: relax the constraints based on JSR202 spec
4189 legal = verify_unqualified_name(bytes, length, LegalField);
4190 }
4191 }
4193 if (!legal) {
4194 ResourceMark rm(THREAD);
4195 Exceptions::fthrow(
4196 THREAD_AND_LOCATION,
4197 vmSymbols::java_lang_ClassFormatError(),
4198 "Illegal field name \"%s\" in class %s", bytes,
4199 _class_name->as_C_string()
4200 );
4201 return;
4202 }
4203 }
4205 // Checks if name is a legal method name.
4206 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4207 if (!_need_verify || _relax_verify) { return; }
4209 assert(name != NULL, "method name is null");
4210 char buf[fixed_buffer_size];
4211 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4212 unsigned int length = name->utf8_length();
4213 bool legal = false;
4215 if (length > 0) {
4216 if (bytes[0] == '<') {
4217 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4218 legal = true;
4219 }
4220 } else if (_major_version < JAVA_1_5_VERSION) {
4221 char* p;
4222 p = skip_over_field_name(bytes, false, length);
4223 legal = (p != NULL) && ((p - bytes) == (int)length);
4224 } else {
4225 // 4881221: relax the constraints based on JSR202 spec
4226 legal = verify_unqualified_name(bytes, length, LegalMethod);
4227 }
4228 }
4230 if (!legal) {
4231 ResourceMark rm(THREAD);
4232 Exceptions::fthrow(
4233 THREAD_AND_LOCATION,
4234 vmSymbols::java_lang_ClassFormatError(),
4235 "Illegal method name \"%s\" in class %s", bytes,
4236 _class_name->as_C_string()
4237 );
4238 return;
4239 }
4240 }
4243 // Checks if signature is a legal field signature.
4244 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4245 if (!_need_verify) { return; }
4247 char buf[fixed_buffer_size];
4248 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4249 unsigned int length = signature->utf8_length();
4250 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4252 if (p == NULL || (p - bytes) != (int)length) {
4253 throwIllegalSignature("Field", name, signature, CHECK);
4254 }
4255 }
4257 // Checks if signature is a legal method signature.
4258 // Returns number of parameters
4259 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4260 if (!_need_verify) {
4261 // make sure caller's args_size will be less than 0 even for non-static
4262 // method so it will be recomputed in compute_size_of_parameters().
4263 return -2;
4264 }
4266 unsigned int args_size = 0;
4267 char buf[fixed_buffer_size];
4268 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4269 unsigned int length = signature->utf8_length();
4270 char* nextp;
4272 // The first character must be a '('
4273 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4274 length--;
4275 // Skip over legal field signatures
4276 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4277 while ((length > 0) && (nextp != NULL)) {
4278 args_size++;
4279 if (p[0] == 'J' || p[0] == 'D') {
4280 args_size++;
4281 }
4282 length -= nextp - p;
4283 p = nextp;
4284 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4285 }
4286 // The first non-signature thing better be a ')'
4287 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4288 length--;
4289 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4290 // All internal methods must return void
4291 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4292 return args_size;
4293 }
4294 } else {
4295 // Now we better just have a return value
4296 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4297 if (nextp && ((int)length == (nextp - p))) {
4298 return args_size;
4299 }
4300 }
4301 }
4302 }
4303 // Report error
4304 throwIllegalSignature("Method", name, signature, CHECK_0);
4305 return 0;
4306 }
4309 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4310 // Method names also may not contain the characters '<' or '>', unless <init>
4311 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4312 // method. Because these names have been checked as special cases before
4313 // calling this method in verify_legal_method_name.
4314 bool ClassFileParser::verify_unqualified_name(
4315 char* name, unsigned int length, int type) {
4316 jchar ch;
4318 for (char* p = name; p != name + length; ) {
4319 ch = *p;
4320 if (ch < 128) {
4321 p++;
4322 if (ch == '.' || ch == ';' || ch == '[' ) {
4323 return false; // do not permit '.', ';', or '['
4324 }
4325 if (type != LegalClass && ch == '/') {
4326 return false; // do not permit '/' unless it's class name
4327 }
4328 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4329 return false; // do not permit '<' or '>' in method names
4330 }
4331 } else {
4332 char* tmp_p = UTF8::next(p, &ch);
4333 p = tmp_p;
4334 }
4335 }
4336 return true;
4337 }
4340 // Take pointer to a string. Skip over the longest part of the string that could
4341 // be taken as a fieldname. Allow '/' if slash_ok is true.
4342 // Return a pointer to just past the fieldname.
4343 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4344 // being true, we saw consecutive slashes (meaning we were looking for a
4345 // qualified path but found something that was badly-formed).
4346 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4347 char* p;
4348 jchar ch;
4349 jboolean last_is_slash = false;
4350 jboolean not_first_ch = false;
4352 for (p = name; p != name + length; not_first_ch = true) {
4353 char* old_p = p;
4354 ch = *p;
4355 if (ch < 128) {
4356 p++;
4357 // quick check for ascii
4358 if ((ch >= 'a' && ch <= 'z') ||
4359 (ch >= 'A' && ch <= 'Z') ||
4360 (ch == '_' || ch == '$') ||
4361 (not_first_ch && ch >= '0' && ch <= '9')) {
4362 last_is_slash = false;
4363 continue;
4364 }
4365 if (slash_ok && ch == '/') {
4366 if (last_is_slash) {
4367 return NULL; // Don't permit consecutive slashes
4368 }
4369 last_is_slash = true;
4370 continue;
4371 }
4372 } else {
4373 jint unicode_ch;
4374 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4375 p = tmp_p;
4376 last_is_slash = false;
4377 // Check if ch is Java identifier start or is Java identifier part
4378 // 4672820: call java.lang.Character methods directly without generating separate tables.
4379 EXCEPTION_MARK;
4380 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4382 // return value
4383 JavaValue result(T_BOOLEAN);
4384 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4385 JavaCallArguments args;
4386 args.push_int(unicode_ch);
4388 // public static boolean isJavaIdentifierStart(char ch);
4389 JavaCalls::call_static(&result,
4390 klass,
4391 vmSymbols::isJavaIdentifierStart_name(),
4392 vmSymbols::int_bool_signature(),
4393 &args,
4394 THREAD);
4396 if (HAS_PENDING_EXCEPTION) {
4397 CLEAR_PENDING_EXCEPTION;
4398 return 0;
4399 }
4400 if (result.get_jboolean()) {
4401 continue;
4402 }
4404 if (not_first_ch) {
4405 // public static boolean isJavaIdentifierPart(char ch);
4406 JavaCalls::call_static(&result,
4407 klass,
4408 vmSymbols::isJavaIdentifierPart_name(),
4409 vmSymbols::int_bool_signature(),
4410 &args,
4411 THREAD);
4413 if (HAS_PENDING_EXCEPTION) {
4414 CLEAR_PENDING_EXCEPTION;
4415 return 0;
4416 }
4418 if (result.get_jboolean()) {
4419 continue;
4420 }
4421 }
4422 }
4423 return (not_first_ch) ? old_p : NULL;
4424 }
4425 return (not_first_ch) ? p : NULL;
4426 }
4429 // Take pointer to a string. Skip over the longest part of the string that could
4430 // be taken as a field signature. Allow "void" if void_ok.
4431 // Return a pointer to just past the signature.
4432 // Return NULL if no legal signature is found.
4433 char* ClassFileParser::skip_over_field_signature(char* signature,
4434 bool void_ok,
4435 unsigned int length,
4436 TRAPS) {
4437 unsigned int array_dim = 0;
4438 while (length > 0) {
4439 switch (signature[0]) {
4440 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4441 case JVM_SIGNATURE_BOOLEAN:
4442 case JVM_SIGNATURE_BYTE:
4443 case JVM_SIGNATURE_CHAR:
4444 case JVM_SIGNATURE_SHORT:
4445 case JVM_SIGNATURE_INT:
4446 case JVM_SIGNATURE_FLOAT:
4447 case JVM_SIGNATURE_LONG:
4448 case JVM_SIGNATURE_DOUBLE:
4449 return signature + 1;
4450 case JVM_SIGNATURE_CLASS: {
4451 if (_major_version < JAVA_1_5_VERSION) {
4452 // Skip over the class name if one is there
4453 char* p = skip_over_field_name(signature + 1, true, --length);
4455 // The next character better be a semicolon
4456 if (p && (p - signature) > 1 && p[0] == ';') {
4457 return p + 1;
4458 }
4459 } else {
4460 // 4900761: For class version > 48, any unicode is allowed in class name.
4461 length--;
4462 signature++;
4463 while (length > 0 && signature[0] != ';') {
4464 if (signature[0] == '.') {
4465 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4466 }
4467 length--;
4468 signature++;
4469 }
4470 if (signature[0] == ';') { return signature + 1; }
4471 }
4473 return NULL;
4474 }
4475 case JVM_SIGNATURE_ARRAY:
4476 array_dim++;
4477 if (array_dim > 255) {
4478 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4479 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4480 }
4481 // The rest of what's there better be a legal signature
4482 signature++;
4483 length--;
4484 void_ok = false;
4485 break;
4487 default:
4488 return NULL;
4489 }
4490 }
4491 return NULL;
4492 }