Fri, 30 Nov 2012 12:01:34 -0800
Merge
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/genericSignatures.hpp"
32 #include "classfile/javaClasses.hpp"
33 #include "classfile/symbolTable.hpp"
34 #include "classfile/systemDictionary.hpp"
35 #include "classfile/verificationType.hpp"
36 #include "classfile/verifier.hpp"
37 #include "classfile/vmSymbols.hpp"
38 #include "memory/allocation.hpp"
39 #include "memory/gcLocker.hpp"
40 #include "memory/metadataFactory.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/universe.inline.hpp"
43 #include "oops/constantPool.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.inline.hpp"
48 #include "oops/klassVtable.hpp"
49 #include "oops/method.hpp"
50 #include "oops/symbol.hpp"
51 #include "prims/jvm.h"
52 #include "prims/jvmtiExport.hpp"
53 #include "prims/jvmtiThreadState.hpp"
54 #include "runtime/javaCalls.hpp"
55 #include "runtime/perfData.hpp"
56 #include "runtime/reflection.hpp"
57 #include "runtime/signature.hpp"
58 #include "runtime/timer.hpp"
59 #include "services/classLoadingService.hpp"
60 #include "services/threadService.hpp"
61 #include "utilities/array.hpp"
63 // We generally try to create the oops directly when parsing, rather than
64 // allocating temporary data structures and copying the bytes twice. A
65 // temporary area is only needed when parsing utf8 entries in the constant
66 // pool and when parsing line number tables.
68 // We add assert in debug mode when class format is not checked.
70 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
71 #define JAVA_MIN_SUPPORTED_VERSION 45
72 #define JAVA_MAX_SUPPORTED_VERSION 52
73 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
75 // Used for two backward compatibility reasons:
76 // - to check for new additions to the class file format in JDK1.5
77 // - to check for bug fixes in the format checker in JDK1.5
78 #define JAVA_1_5_VERSION 49
80 // Used for backward compatibility reasons:
81 // - to check for javac bug fixes that happened after 1.5
82 // - also used as the max version when running in jdk6
83 #define JAVA_6_VERSION 50
85 // Used for backward compatibility reasons:
86 // - to check NameAndType_info signatures more aggressively
87 #define JAVA_7_VERSION 51
89 // Extension method support.
90 #define JAVA_8_VERSION 52
93 void ClassFileParser::parse_constant_pool_entries(ClassLoaderData* loader_data, constantPoolHandle cp, int length, TRAPS) {
94 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
95 // this function (_current can be allocated in a register, with scalar
96 // replacement of aggregates). The _current pointer is copied back to
97 // stream() when this function returns. DON'T call another method within
98 // this method that uses stream().
99 ClassFileStream* cfs0 = stream();
100 ClassFileStream cfs1 = *cfs0;
101 ClassFileStream* cfs = &cfs1;
102 #ifdef ASSERT
103 assert(cfs->allocated_on_stack(),"should be local");
104 u1* old_current = cfs0->current();
105 #endif
106 Handle class_loader(THREAD, loader_data->class_loader());
108 // Used for batching symbol allocations.
109 const char* names[SymbolTable::symbol_alloc_batch_size];
110 int lengths[SymbolTable::symbol_alloc_batch_size];
111 int indices[SymbolTable::symbol_alloc_batch_size];
112 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
113 int names_count = 0;
115 // parsing Index 0 is unused
116 for (int index = 1; index < length; index++) {
117 // Each of the following case guarantees one more byte in the stream
118 // for the following tag or the access_flags following constant pool,
119 // so we don't need bounds-check for reading tag.
120 u1 tag = cfs->get_u1_fast();
121 switch (tag) {
122 case JVM_CONSTANT_Class :
123 {
124 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
125 u2 name_index = cfs->get_u2_fast();
126 cp->klass_index_at_put(index, name_index);
127 }
128 break;
129 case JVM_CONSTANT_Fieldref :
130 {
131 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
132 u2 class_index = cfs->get_u2_fast();
133 u2 name_and_type_index = cfs->get_u2_fast();
134 cp->field_at_put(index, class_index, name_and_type_index);
135 }
136 break;
137 case JVM_CONSTANT_Methodref :
138 {
139 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
140 u2 class_index = cfs->get_u2_fast();
141 u2 name_and_type_index = cfs->get_u2_fast();
142 cp->method_at_put(index, class_index, name_and_type_index);
143 }
144 break;
145 case JVM_CONSTANT_InterfaceMethodref :
146 {
147 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
148 u2 class_index = cfs->get_u2_fast();
149 u2 name_and_type_index = cfs->get_u2_fast();
150 cp->interface_method_at_put(index, class_index, name_and_type_index);
151 }
152 break;
153 case JVM_CONSTANT_String :
154 {
155 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
156 u2 string_index = cfs->get_u2_fast();
157 cp->string_index_at_put(index, string_index);
158 }
159 break;
160 case JVM_CONSTANT_MethodHandle :
161 case JVM_CONSTANT_MethodType :
162 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
163 classfile_parse_error(
164 "Class file version does not support constant tag %u in class file %s",
165 tag, CHECK);
166 }
167 if (!EnableInvokeDynamic) {
168 classfile_parse_error(
169 "This JVM does not support constant tag %u in class file %s",
170 tag, CHECK);
171 }
172 if (tag == JVM_CONSTANT_MethodHandle) {
173 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
174 u1 ref_kind = cfs->get_u1_fast();
175 u2 method_index = cfs->get_u2_fast();
176 cp->method_handle_index_at_put(index, ref_kind, method_index);
177 } else if (tag == JVM_CONSTANT_MethodType) {
178 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
179 u2 signature_index = cfs->get_u2_fast();
180 cp->method_type_index_at_put(index, signature_index);
181 } else {
182 ShouldNotReachHere();
183 }
184 break;
185 case JVM_CONSTANT_InvokeDynamic :
186 {
187 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
188 classfile_parse_error(
189 "Class file version does not support constant tag %u in class file %s",
190 tag, CHECK);
191 }
192 if (!EnableInvokeDynamic) {
193 classfile_parse_error(
194 "This JVM does not support constant tag %u in class file %s",
195 tag, CHECK);
196 }
197 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
198 u2 bootstrap_specifier_index = cfs->get_u2_fast();
199 u2 name_and_type_index = cfs->get_u2_fast();
200 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
201 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
202 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
203 }
204 break;
205 case JVM_CONSTANT_Integer :
206 {
207 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
208 u4 bytes = cfs->get_u4_fast();
209 cp->int_at_put(index, (jint) bytes);
210 }
211 break;
212 case JVM_CONSTANT_Float :
213 {
214 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
215 u4 bytes = cfs->get_u4_fast();
216 cp->float_at_put(index, *(jfloat*)&bytes);
217 }
218 break;
219 case JVM_CONSTANT_Long :
220 // A mangled type might cause you to overrun allocated memory
221 guarantee_property(index+1 < length,
222 "Invalid constant pool entry %u in class file %s",
223 index, CHECK);
224 {
225 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
226 u8 bytes = cfs->get_u8_fast();
227 cp->long_at_put(index, bytes);
228 }
229 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
230 break;
231 case JVM_CONSTANT_Double :
232 // A mangled type might cause you to overrun allocated memory
233 guarantee_property(index+1 < length,
234 "Invalid constant pool entry %u in class file %s",
235 index, CHECK);
236 {
237 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
238 u8 bytes = cfs->get_u8_fast();
239 cp->double_at_put(index, *(jdouble*)&bytes);
240 }
241 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
242 break;
243 case JVM_CONSTANT_NameAndType :
244 {
245 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
246 u2 name_index = cfs->get_u2_fast();
247 u2 signature_index = cfs->get_u2_fast();
248 cp->name_and_type_at_put(index, name_index, signature_index);
249 }
250 break;
251 case JVM_CONSTANT_Utf8 :
252 {
253 cfs->guarantee_more(2, CHECK); // utf8_length
254 u2 utf8_length = cfs->get_u2_fast();
255 u1* utf8_buffer = cfs->get_u1_buffer();
256 assert(utf8_buffer != NULL, "null utf8 buffer");
257 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
258 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
259 cfs->skip_u1_fast(utf8_length);
261 // Before storing the symbol, make sure it's legal
262 if (_need_verify) {
263 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
264 }
266 if (EnableInvokeDynamic && has_cp_patch_at(index)) {
267 Handle patch = clear_cp_patch_at(index);
268 guarantee_property(java_lang_String::is_instance(patch()),
269 "Illegal utf8 patch at %d in class file %s",
270 index, CHECK);
271 char* str = java_lang_String::as_utf8_string(patch());
272 // (could use java_lang_String::as_symbol instead, but might as well batch them)
273 utf8_buffer = (u1*) str;
274 utf8_length = (int) strlen(str);
275 }
277 unsigned int hash;
278 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
279 if (result == NULL) {
280 names[names_count] = (char*)utf8_buffer;
281 lengths[names_count] = utf8_length;
282 indices[names_count] = index;
283 hashValues[names_count++] = hash;
284 if (names_count == SymbolTable::symbol_alloc_batch_size) {
285 SymbolTable::new_symbols(loader_data, cp, names_count, names, lengths, indices, hashValues, CHECK);
286 names_count = 0;
287 }
288 } else {
289 cp->symbol_at_put(index, result);
290 }
291 }
292 break;
293 default:
294 classfile_parse_error(
295 "Unknown constant tag %u in class file %s", tag, CHECK);
296 break;
297 }
298 }
300 // Allocate the remaining symbols
301 if (names_count > 0) {
302 SymbolTable::new_symbols(loader_data, cp, names_count, names, lengths, indices, hashValues, CHECK);
303 }
305 // Copy _current pointer of local copy back to stream().
306 #ifdef ASSERT
307 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
308 #endif
309 cfs0->set_current(cfs1.current());
310 }
312 // This class unreferences constant pool symbols if an error has occurred
313 // while parsing the class before it is assigned into the class.
314 // If it gets an error after that it is unloaded and the constant pool will
315 // be cleaned up then.
316 class ConstantPoolCleaner : public StackObj {
317 constantPoolHandle _cphandle;
318 bool _in_error;
319 public:
320 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
321 ~ConstantPoolCleaner() {
322 if (_in_error && _cphandle.not_null()) {
323 _cphandle->unreference_symbols();
324 }
325 }
326 void set_in_error(bool clean) { _in_error = clean; }
327 };
329 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
331 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
332 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
333 return cp->symbol_at(index);
334 else
335 return NULL;
336 }
338 constantPoolHandle ClassFileParser::parse_constant_pool(ClassLoaderData* loader_data, TRAPS) {
339 ClassFileStream* cfs = stream();
340 constantPoolHandle nullHandle;
342 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
343 u2 length = cfs->get_u2_fast();
344 guarantee_property(
345 length >= 1, "Illegal constant pool size %u in class file %s",
346 length, CHECK_(nullHandle));
347 ConstantPool* constant_pool =
348 ConstantPool::allocate(loader_data,
349 length,
350 CHECK_(nullHandle));
351 constantPoolHandle cp (THREAD, constant_pool);
353 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
355 // parsing constant pool entries
356 parse_constant_pool_entries(loader_data, cp, length, CHECK_(nullHandle));
358 int index = 1; // declared outside of loops for portability
360 // first verification pass - validate cross references and fixup class and string constants
361 for (index = 1; index < length; index++) { // Index 0 is unused
362 jbyte tag = cp->tag_at(index).value();
363 switch (tag) {
364 case JVM_CONSTANT_Class :
365 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
366 break;
367 case JVM_CONSTANT_Fieldref :
368 // fall through
369 case JVM_CONSTANT_Methodref :
370 // fall through
371 case JVM_CONSTANT_InterfaceMethodref : {
372 if (!_need_verify) break;
373 int klass_ref_index = cp->klass_ref_index_at(index);
374 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
375 check_property(valid_cp_range(klass_ref_index, length) &&
376 is_klass_reference(cp, klass_ref_index),
377 "Invalid constant pool index %u in class file %s",
378 klass_ref_index,
379 CHECK_(nullHandle));
380 check_property(valid_cp_range(name_and_type_ref_index, length) &&
381 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
382 "Invalid constant pool index %u in class file %s",
383 name_and_type_ref_index,
384 CHECK_(nullHandle));
385 break;
386 }
387 case JVM_CONSTANT_String :
388 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
389 break;
390 case JVM_CONSTANT_Integer :
391 break;
392 case JVM_CONSTANT_Float :
393 break;
394 case JVM_CONSTANT_Long :
395 case JVM_CONSTANT_Double :
396 index++;
397 check_property(
398 (index < length && cp->tag_at(index).is_invalid()),
399 "Improper constant pool long/double index %u in class file %s",
400 index, CHECK_(nullHandle));
401 break;
402 case JVM_CONSTANT_NameAndType : {
403 if (!_need_verify) break;
404 int name_ref_index = cp->name_ref_index_at(index);
405 int signature_ref_index = cp->signature_ref_index_at(index);
406 check_property(
407 valid_cp_range(name_ref_index, length) &&
408 cp->tag_at(name_ref_index).is_utf8(),
409 "Invalid constant pool index %u in class file %s",
410 name_ref_index, CHECK_(nullHandle));
411 check_property(
412 valid_cp_range(signature_ref_index, length) &&
413 cp->tag_at(signature_ref_index).is_utf8(),
414 "Invalid constant pool index %u in class file %s",
415 signature_ref_index, CHECK_(nullHandle));
416 break;
417 }
418 case JVM_CONSTANT_Utf8 :
419 break;
420 case JVM_CONSTANT_UnresolvedClass : // fall-through
421 case JVM_CONSTANT_UnresolvedClassInError:
422 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
423 break;
424 case JVM_CONSTANT_ClassIndex :
425 {
426 int class_index = cp->klass_index_at(index);
427 check_property(
428 valid_cp_range(class_index, length) &&
429 cp->tag_at(class_index).is_utf8(),
430 "Invalid constant pool index %u in class file %s",
431 class_index, CHECK_(nullHandle));
432 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
433 }
434 break;
435 case JVM_CONSTANT_StringIndex :
436 {
437 int string_index = cp->string_index_at(index);
438 check_property(
439 valid_cp_range(string_index, length) &&
440 cp->tag_at(string_index).is_utf8(),
441 "Invalid constant pool index %u in class file %s",
442 string_index, CHECK_(nullHandle));
443 Symbol* sym = cp->symbol_at(string_index);
444 cp->unresolved_string_at_put(index, sym);
445 }
446 break;
447 case JVM_CONSTANT_MethodHandle :
448 {
449 int ref_index = cp->method_handle_index_at(index);
450 check_property(
451 valid_cp_range(ref_index, length) &&
452 EnableInvokeDynamic,
453 "Invalid constant pool index %u in class file %s",
454 ref_index, CHECK_(nullHandle));
455 constantTag tag = cp->tag_at(ref_index);
456 int ref_kind = cp->method_handle_ref_kind_at(index);
457 switch (ref_kind) {
458 case JVM_REF_getField:
459 case JVM_REF_getStatic:
460 case JVM_REF_putField:
461 case JVM_REF_putStatic:
462 check_property(
463 tag.is_field(),
464 "Invalid constant pool index %u in class file %s (not a field)",
465 ref_index, CHECK_(nullHandle));
466 break;
467 case JVM_REF_invokeVirtual:
468 case JVM_REF_invokeStatic:
469 case JVM_REF_invokeSpecial:
470 case JVM_REF_newInvokeSpecial:
471 check_property(
472 tag.is_method(),
473 "Invalid constant pool index %u in class file %s (not a method)",
474 ref_index, CHECK_(nullHandle));
475 break;
476 case JVM_REF_invokeInterface:
477 check_property(
478 tag.is_interface_method(),
479 "Invalid constant pool index %u in class file %s (not an interface method)",
480 ref_index, CHECK_(nullHandle));
481 break;
482 default:
483 classfile_parse_error(
484 "Bad method handle kind at constant pool index %u in class file %s",
485 index, CHECK_(nullHandle));
486 }
487 // Keep the ref_index unchanged. It will be indirected at link-time.
488 }
489 break;
490 case JVM_CONSTANT_MethodType :
491 {
492 int ref_index = cp->method_type_index_at(index);
493 check_property(
494 valid_cp_range(ref_index, length) &&
495 cp->tag_at(ref_index).is_utf8() &&
496 EnableInvokeDynamic,
497 "Invalid constant pool index %u in class file %s",
498 ref_index, CHECK_(nullHandle));
499 }
500 break;
501 case JVM_CONSTANT_InvokeDynamic :
502 {
503 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
504 check_property(valid_cp_range(name_and_type_ref_index, length) &&
505 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
506 "Invalid constant pool index %u in class file %s",
507 name_and_type_ref_index,
508 CHECK_(nullHandle));
509 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
510 break;
511 }
512 default:
513 fatal(err_msg("bad constant pool tag value %u",
514 cp->tag_at(index).value()));
515 ShouldNotReachHere();
516 break;
517 } // end of switch
518 } // end of for
520 if (_cp_patches != NULL) {
521 // need to treat this_class specially...
522 assert(EnableInvokeDynamic, "");
523 int this_class_index;
524 {
525 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
526 u1* mark = cfs->current();
527 u2 flags = cfs->get_u2_fast();
528 this_class_index = cfs->get_u2_fast();
529 cfs->set_current(mark); // revert to mark
530 }
532 for (index = 1; index < length; index++) { // Index 0 is unused
533 if (has_cp_patch_at(index)) {
534 guarantee_property(index != this_class_index,
535 "Illegal constant pool patch to self at %d in class file %s",
536 index, CHECK_(nullHandle));
537 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
538 }
539 }
540 }
542 if (!_need_verify) {
543 cp_in_error.set_in_error(false);
544 return cp;
545 }
547 // second verification pass - checks the strings are of the right format.
548 // but not yet to the other entries
549 for (index = 1; index < length; index++) {
550 jbyte tag = cp->tag_at(index).value();
551 switch (tag) {
552 case JVM_CONSTANT_UnresolvedClass: {
553 Symbol* class_name = cp->unresolved_klass_at(index);
554 // check the name, even if _cp_patches will overwrite it
555 verify_legal_class_name(class_name, CHECK_(nullHandle));
556 break;
557 }
558 case JVM_CONSTANT_NameAndType: {
559 if (_need_verify && _major_version >= JAVA_7_VERSION) {
560 int sig_index = cp->signature_ref_index_at(index);
561 int name_index = cp->name_ref_index_at(index);
562 Symbol* name = cp->symbol_at(name_index);
563 Symbol* sig = cp->symbol_at(sig_index);
564 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
565 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
566 } else {
567 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
568 }
569 }
570 break;
571 }
572 case JVM_CONSTANT_InvokeDynamic:
573 case JVM_CONSTANT_Fieldref:
574 case JVM_CONSTANT_Methodref:
575 case JVM_CONSTANT_InterfaceMethodref: {
576 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
577 // already verified to be utf8
578 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
579 // already verified to be utf8
580 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
581 Symbol* name = cp->symbol_at(name_ref_index);
582 Symbol* signature = cp->symbol_at(signature_ref_index);
583 if (tag == JVM_CONSTANT_Fieldref) {
584 verify_legal_field_name(name, CHECK_(nullHandle));
585 if (_need_verify && _major_version >= JAVA_7_VERSION) {
586 // Signature is verified above, when iterating NameAndType_info.
587 // Need only to be sure it's the right type.
588 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
589 throwIllegalSignature(
590 "Field", name, signature, CHECK_(nullHandle));
591 }
592 } else {
593 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
594 }
595 } else {
596 verify_legal_method_name(name, CHECK_(nullHandle));
597 if (_need_verify && _major_version >= JAVA_7_VERSION) {
598 // Signature is verified above, when iterating NameAndType_info.
599 // Need only to be sure it's the right type.
600 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
601 throwIllegalSignature(
602 "Method", name, signature, CHECK_(nullHandle));
603 }
604 } else {
605 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
606 }
607 if (tag == JVM_CONSTANT_Methodref) {
608 // 4509014: If a class method name begins with '<', it must be "<init>".
609 assert(name != NULL, "method name in constant pool is null");
610 unsigned int name_len = name->utf8_length();
611 assert(name_len > 0, "bad method name"); // already verified as legal name
612 if (name->byte_at(0) == '<') {
613 if (name != vmSymbols::object_initializer_name()) {
614 classfile_parse_error(
615 "Bad method name at constant pool index %u in class file %s",
616 name_ref_index, CHECK_(nullHandle));
617 }
618 }
619 }
620 }
621 break;
622 }
623 case JVM_CONSTANT_MethodHandle: {
624 int ref_index = cp->method_handle_index_at(index);
625 int ref_kind = cp->method_handle_ref_kind_at(index);
626 switch (ref_kind) {
627 case JVM_REF_invokeVirtual:
628 case JVM_REF_invokeStatic:
629 case JVM_REF_invokeSpecial:
630 case JVM_REF_newInvokeSpecial:
631 {
632 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
633 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
634 Symbol* name = cp->symbol_at(name_ref_index);
635 if (ref_kind == JVM_REF_newInvokeSpecial) {
636 if (name != vmSymbols::object_initializer_name()) {
637 classfile_parse_error(
638 "Bad constructor name at constant pool index %u in class file %s",
639 name_ref_index, CHECK_(nullHandle));
640 }
641 } else {
642 if (name == vmSymbols::object_initializer_name()) {
643 classfile_parse_error(
644 "Bad method name at constant pool index %u in class file %s",
645 name_ref_index, CHECK_(nullHandle));
646 }
647 }
648 }
649 break;
650 // Other ref_kinds are already fully checked in previous pass.
651 }
652 break;
653 }
654 case JVM_CONSTANT_MethodType: {
655 Symbol* no_name = vmSymbols::type_name(); // place holder
656 Symbol* signature = cp->method_type_signature_at(index);
657 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
658 break;
659 }
660 case JVM_CONSTANT_Utf8: {
661 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
662 }
663 } // end of switch
664 } // end of for
666 cp_in_error.set_in_error(false);
667 return cp;
668 }
671 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
672 assert(EnableInvokeDynamic, "");
673 BasicType patch_type = T_VOID;
675 switch (cp->tag_at(index).value()) {
677 case JVM_CONSTANT_UnresolvedClass :
678 // Patching a class means pre-resolving it.
679 // The name in the constant pool is ignored.
680 if (java_lang_Class::is_instance(patch())) {
681 guarantee_property(!java_lang_Class::is_primitive(patch()),
682 "Illegal class patch at %d in class file %s",
683 index, CHECK);
684 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
685 } else {
686 guarantee_property(java_lang_String::is_instance(patch()),
687 "Illegal class patch at %d in class file %s",
688 index, CHECK);
689 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
690 cp->unresolved_klass_at_put(index, name);
691 }
692 break;
694 case JVM_CONSTANT_String :
695 // skip this patch and don't clear it. Needs the oop array for resolved
696 // references to be created first.
697 return;
699 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
700 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
701 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
702 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
703 patch_prim:
704 {
705 jvalue value;
706 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
707 guarantee_property(value_type == patch_type,
708 "Illegal primitive patch at %d in class file %s",
709 index, CHECK);
710 switch (value_type) {
711 case T_INT: cp->int_at_put(index, value.i); break;
712 case T_FLOAT: cp->float_at_put(index, value.f); break;
713 case T_LONG: cp->long_at_put(index, value.j); break;
714 case T_DOUBLE: cp->double_at_put(index, value.d); break;
715 default: assert(false, "");
716 }
717 }
718 break;
720 default:
721 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
722 guarantee_property(!has_cp_patch_at(index),
723 "Illegal unexpected patch at %d in class file %s",
724 index, CHECK);
725 return;
726 }
728 // On fall-through, mark the patch as used.
729 clear_cp_patch_at(index);
730 }
734 class NameSigHash: public ResourceObj {
735 public:
736 Symbol* _name; // name
737 Symbol* _sig; // signature
738 NameSigHash* _next; // Next entry in hash table
739 };
742 #define HASH_ROW_SIZE 256
744 unsigned int hash(Symbol* name, Symbol* sig) {
745 unsigned int raw_hash = 0;
746 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
747 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
749 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
750 }
753 void initialize_hashtable(NameSigHash** table) {
754 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
755 }
757 // Return false if the name/sig combination is found in table.
758 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
759 // The old format checker uses heap sort to find duplicates.
760 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
761 // of table since we don't expect Symbol*'s to move.
762 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
763 assert(name != NULL, "name in constant pool is NULL");
765 // First lookup for duplicates
766 int index = hash(name, sig);
767 NameSigHash* entry = table[index];
768 while (entry != NULL) {
769 if (entry->_name == name && entry->_sig == sig) {
770 return false;
771 }
772 entry = entry->_next;
773 }
775 // No duplicate is found, allocate a new entry and fill it.
776 entry = new NameSigHash();
777 entry->_name = name;
778 entry->_sig = sig;
780 // Insert into hash table
781 entry->_next = table[index];
782 table[index] = entry;
784 return true;
785 }
788 Array<Klass*>* ClassFileParser::parse_interfaces(constantPoolHandle cp,
789 int length,
790 ClassLoaderData* loader_data,
791 Handle protection_domain,
792 Symbol* class_name,
793 bool* has_default_methods,
794 TRAPS) {
795 ClassFileStream* cfs = stream();
796 assert(length > 0, "only called for length>0");
797 // FIXME: Leak at later OOM.
798 Array<Klass*>* interfaces = MetadataFactory::new_array<Klass*>(loader_data, length, NULL, CHECK_NULL);
800 int index;
801 for (index = 0; index < length; index++) {
802 u2 interface_index = cfs->get_u2(CHECK_NULL);
803 KlassHandle interf;
804 check_property(
805 valid_cp_range(interface_index, cp->length()) &&
806 is_klass_reference(cp, interface_index),
807 "Interface name has bad constant pool index %u in class file %s",
808 interface_index, CHECK_NULL);
809 if (cp->tag_at(interface_index).is_klass()) {
810 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
811 } else {
812 Symbol* unresolved_klass = cp->klass_name_at(interface_index);
814 // Don't need to check legal name because it's checked when parsing constant pool.
815 // But need to make sure it's not an array type.
816 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
817 "Bad interface name in class file %s", CHECK_NULL);
818 Handle class_loader(THREAD, loader_data->class_loader());
820 // Call resolve_super so classcircularity is checked
821 Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
822 unresolved_klass, class_loader, protection_domain,
823 false, CHECK_NULL);
824 interf = KlassHandle(THREAD, k);
825 }
827 if (!interf()->is_interface()) {
828 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
829 }
830 if (InstanceKlass::cast(interf())->has_default_methods()) {
831 *has_default_methods = true;
832 }
833 interfaces->at_put(index, interf());
834 }
836 if (!_need_verify || length <= 1) {
837 return interfaces;
838 }
840 // Check if there's any duplicates in interfaces
841 ResourceMark rm(THREAD);
842 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
843 THREAD, NameSigHash*, HASH_ROW_SIZE);
844 initialize_hashtable(interface_names);
845 bool dup = false;
846 {
847 debug_only(No_Safepoint_Verifier nsv;)
848 for (index = 0; index < length; index++) {
849 Klass* k = interfaces->at(index);
850 Symbol* name = InstanceKlass::cast(k)->name();
851 // If no duplicates, add (name, NULL) in hashtable interface_names.
852 if (!put_after_lookup(name, NULL, interface_names)) {
853 dup = true;
854 break;
855 }
856 }
857 }
858 if (dup) {
859 classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
860 }
862 return interfaces;
863 }
866 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
867 // Make sure the constant pool entry is of a type appropriate to this field
868 guarantee_property(
869 (constantvalue_index > 0 &&
870 constantvalue_index < cp->length()),
871 "Bad initial value index %u in ConstantValue attribute in class file %s",
872 constantvalue_index, CHECK);
873 constantTag value_type = cp->tag_at(constantvalue_index);
874 switch ( cp->basic_type_for_signature_at(signature_index) ) {
875 case T_LONG:
876 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
877 break;
878 case T_FLOAT:
879 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
880 break;
881 case T_DOUBLE:
882 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
883 break;
884 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
885 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
886 break;
887 case T_OBJECT:
888 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
889 && value_type.is_string()),
890 "Bad string initial value in class file %s", CHECK);
891 break;
892 default:
893 classfile_parse_error(
894 "Unable to set initial value %u in class file %s",
895 constantvalue_index, CHECK);
896 }
897 }
900 // Parse attributes for a field.
901 void ClassFileParser::parse_field_attributes(ClassLoaderData* loader_data,
902 constantPoolHandle cp,
903 u2 attributes_count,
904 bool is_static, u2 signature_index,
905 u2* constantvalue_index_addr,
906 bool* is_synthetic_addr,
907 u2* generic_signature_index_addr,
908 AnnotationArray** field_annotations,
909 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
910 TRAPS) {
911 ClassFileStream* cfs = stream();
912 assert(attributes_count > 0, "length should be greater than 0");
913 u2 constantvalue_index = 0;
914 u2 generic_signature_index = 0;
915 bool is_synthetic = false;
916 u1* runtime_visible_annotations = NULL;
917 int runtime_visible_annotations_length = 0;
918 u1* runtime_invisible_annotations = NULL;
919 int runtime_invisible_annotations_length = 0;
920 while (attributes_count--) {
921 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
922 u2 attribute_name_index = cfs->get_u2_fast();
923 u4 attribute_length = cfs->get_u4_fast();
924 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
925 cp->tag_at(attribute_name_index).is_utf8(),
926 "Invalid field attribute index %u in class file %s",
927 attribute_name_index,
928 CHECK);
929 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
930 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
931 // ignore if non-static
932 if (constantvalue_index != 0) {
933 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
934 }
935 check_property(
936 attribute_length == 2,
937 "Invalid ConstantValue field attribute length %u in class file %s",
938 attribute_length, CHECK);
939 constantvalue_index = cfs->get_u2(CHECK);
940 if (_need_verify) {
941 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
942 }
943 } else if (attribute_name == vmSymbols::tag_synthetic()) {
944 if (attribute_length != 0) {
945 classfile_parse_error(
946 "Invalid Synthetic field attribute length %u in class file %s",
947 attribute_length, CHECK);
948 }
949 is_synthetic = true;
950 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
951 if (attribute_length != 0) {
952 classfile_parse_error(
953 "Invalid Deprecated field attribute length %u in class file %s",
954 attribute_length, CHECK);
955 }
956 } else if (_major_version >= JAVA_1_5_VERSION) {
957 if (attribute_name == vmSymbols::tag_signature()) {
958 if (attribute_length != 2) {
959 classfile_parse_error(
960 "Wrong size %u for field's Signature attribute in class file %s",
961 attribute_length, CHECK);
962 }
963 generic_signature_index = cfs->get_u2(CHECK);
964 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
965 runtime_visible_annotations_length = attribute_length;
966 runtime_visible_annotations = cfs->get_u1_buffer();
967 assert(runtime_visible_annotations != NULL, "null visible annotations");
968 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
969 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
970 runtime_invisible_annotations_length = attribute_length;
971 runtime_invisible_annotations = cfs->get_u1_buffer();
972 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
973 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
974 } else {
975 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
976 }
977 } else {
978 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
979 }
980 }
982 *constantvalue_index_addr = constantvalue_index;
983 *is_synthetic_addr = is_synthetic;
984 *generic_signature_index_addr = generic_signature_index;
985 *field_annotations = assemble_annotations(loader_data,
986 runtime_visible_annotations,
987 runtime_visible_annotations_length,
988 runtime_invisible_annotations,
989 runtime_invisible_annotations_length,
990 CHECK);
991 return;
992 }
995 // Field allocation types. Used for computing field offsets.
997 enum FieldAllocationType {
998 STATIC_OOP, // Oops
999 STATIC_BYTE, // Boolean, Byte, char
1000 STATIC_SHORT, // shorts
1001 STATIC_WORD, // ints
1002 STATIC_DOUBLE, // aligned long or double
1003 NONSTATIC_OOP,
1004 NONSTATIC_BYTE,
1005 NONSTATIC_SHORT,
1006 NONSTATIC_WORD,
1007 NONSTATIC_DOUBLE,
1008 MAX_FIELD_ALLOCATION_TYPE,
1009 BAD_ALLOCATION_TYPE = -1
1010 };
1012 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1013 BAD_ALLOCATION_TYPE, // 0
1014 BAD_ALLOCATION_TYPE, // 1
1015 BAD_ALLOCATION_TYPE, // 2
1016 BAD_ALLOCATION_TYPE, // 3
1017 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1018 NONSTATIC_SHORT, // T_CHAR = 5,
1019 NONSTATIC_WORD, // T_FLOAT = 6,
1020 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1021 NONSTATIC_BYTE, // T_BYTE = 8,
1022 NONSTATIC_SHORT, // T_SHORT = 9,
1023 NONSTATIC_WORD, // T_INT = 10,
1024 NONSTATIC_DOUBLE, // T_LONG = 11,
1025 NONSTATIC_OOP, // T_OBJECT = 12,
1026 NONSTATIC_OOP, // T_ARRAY = 13,
1027 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1028 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1029 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1030 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1031 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1032 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1033 BAD_ALLOCATION_TYPE, // 0
1034 BAD_ALLOCATION_TYPE, // 1
1035 BAD_ALLOCATION_TYPE, // 2
1036 BAD_ALLOCATION_TYPE, // 3
1037 STATIC_BYTE , // T_BOOLEAN = 4,
1038 STATIC_SHORT, // T_CHAR = 5,
1039 STATIC_WORD, // T_FLOAT = 6,
1040 STATIC_DOUBLE, // T_DOUBLE = 7,
1041 STATIC_BYTE, // T_BYTE = 8,
1042 STATIC_SHORT, // T_SHORT = 9,
1043 STATIC_WORD, // T_INT = 10,
1044 STATIC_DOUBLE, // T_LONG = 11,
1045 STATIC_OOP, // T_OBJECT = 12,
1046 STATIC_OOP, // T_ARRAY = 13,
1047 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1048 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1049 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1050 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1051 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1052 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1053 };
1055 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1056 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1057 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1058 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1059 return result;
1060 }
1062 class FieldAllocationCount: public ResourceObj {
1063 public:
1064 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1066 FieldAllocationCount() {
1067 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1068 count[i] = 0;
1069 }
1070 }
1072 FieldAllocationType update(bool is_static, BasicType type) {
1073 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1074 // Make sure there is no overflow with injected fields.
1075 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1076 count[atype]++;
1077 return atype;
1078 }
1079 };
1081 Array<u2>* ClassFileParser::parse_fields(ClassLoaderData* loader_data,
1082 Symbol* class_name,
1083 constantPoolHandle cp,
1084 bool is_interface,
1085 FieldAllocationCount *fac,
1086 Array<AnnotationArray*>** fields_annotations,
1087 u2* java_fields_count_ptr, TRAPS) {
1088 ClassFileStream* cfs = stream();
1089 cfs->guarantee_more(2, CHECK_NULL); // length
1090 u2 length = cfs->get_u2_fast();
1091 *java_fields_count_ptr = length;
1093 int num_injected = 0;
1094 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1095 int total_fields = length + num_injected;
1097 // The field array starts with tuples of shorts
1098 // [access, name index, sig index, initial value index, byte offset].
1099 // A generic signature slot only exists for field with generic
1100 // signature attribute. And the access flag is set with
1101 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1102 // signature slots are at the end of the field array and after all
1103 // other fields data.
1104 //
1105 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1106 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1107 // ...
1108 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1109 // [generic signature index]
1110 // [generic signature index]
1111 // ...
1112 //
1113 // Allocate a temporary resource array for field data. For each field,
1114 // a slot is reserved in the temporary array for the generic signature
1115 // index. After parsing all fields, the data are copied to a permanent
1116 // array and any unused slots will be discarded.
1117 ResourceMark rm(THREAD);
1118 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1119 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1121 AnnotationArray* field_annotations = NULL;
1122 // The generic signature slots start after all other fields' data.
1123 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1124 int num_generic_signature = 0;
1125 for (int n = 0; n < length; n++) {
1126 cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count
1128 AccessFlags access_flags;
1129 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1130 verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1131 access_flags.set_flags(flags);
1133 u2 name_index = cfs->get_u2_fast();
1134 int cp_size = cp->length();
1135 check_property(
1136 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1137 "Invalid constant pool index %u for field name in class file %s",
1138 name_index, CHECK_NULL);
1139 Symbol* name = cp->symbol_at(name_index);
1140 verify_legal_field_name(name, CHECK_NULL);
1142 u2 signature_index = cfs->get_u2_fast();
1143 check_property(
1144 valid_cp_range(signature_index, cp_size) &&
1145 cp->tag_at(signature_index).is_utf8(),
1146 "Invalid constant pool index %u for field signature in class file %s",
1147 signature_index, CHECK_NULL);
1148 Symbol* sig = cp->symbol_at(signature_index);
1149 verify_legal_field_signature(name, sig, CHECK_NULL);
1151 u2 constantvalue_index = 0;
1152 bool is_synthetic = false;
1153 u2 generic_signature_index = 0;
1154 bool is_static = access_flags.is_static();
1155 FieldAnnotationCollector parsed_annotations;
1157 u2 attributes_count = cfs->get_u2_fast();
1158 if (attributes_count > 0) {
1159 parse_field_attributes(loader_data,
1160 cp, attributes_count, is_static, signature_index,
1161 &constantvalue_index, &is_synthetic,
1162 &generic_signature_index, &field_annotations,
1163 &parsed_annotations,
1164 CHECK_NULL);
1165 if (field_annotations != NULL) {
1166 if (*fields_annotations == NULL) {
1167 *fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1168 loader_data, length, NULL,
1169 CHECK_NULL);
1170 }
1171 (*fields_annotations)->at_put(n, field_annotations);
1172 }
1173 if (is_synthetic) {
1174 access_flags.set_is_synthetic();
1175 }
1176 if (generic_signature_index != 0) {
1177 access_flags.set_field_has_generic_signature();
1178 fa[generic_signature_slot] = generic_signature_index;
1179 generic_signature_slot ++;
1180 num_generic_signature ++;
1181 }
1182 }
1184 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1185 field->initialize(access_flags.as_short(),
1186 name_index,
1187 signature_index,
1188 constantvalue_index,
1189 0);
1190 if (parsed_annotations.has_any_annotations())
1191 parsed_annotations.apply_to(field);
1193 BasicType type = cp->basic_type_for_signature_at(signature_index);
1195 // Remember how many oops we encountered and compute allocation type
1196 FieldAllocationType atype = fac->update(is_static, type);
1198 // The correct offset is computed later (all oop fields will be located together)
1199 // We temporarily store the allocation type in the offset field
1200 field->set_offset(atype);
1201 }
1203 int index = length;
1204 if (num_injected != 0) {
1205 for (int n = 0; n < num_injected; n++) {
1206 // Check for duplicates
1207 if (injected[n].may_be_java) {
1208 Symbol* name = injected[n].name();
1209 Symbol* signature = injected[n].signature();
1210 bool duplicate = false;
1211 for (int i = 0; i < length; i++) {
1212 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1213 if (name == cp->symbol_at(f->name_index()) &&
1214 signature == cp->symbol_at(f->signature_index())) {
1215 // Symbol is desclared in Java so skip this one
1216 duplicate = true;
1217 break;
1218 }
1219 }
1220 if (duplicate) {
1221 // These will be removed from the field array at the end
1222 continue;
1223 }
1224 }
1226 // Injected field
1227 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1228 field->initialize(JVM_ACC_FIELD_INTERNAL,
1229 injected[n].name_index,
1230 injected[n].signature_index,
1231 0,
1232 0);
1234 BasicType type = FieldType::basic_type(injected[n].signature());
1236 // Remember how many oops we encountered and compute allocation type
1237 FieldAllocationType atype = fac->update(false, type);
1239 // The correct offset is computed later (all oop fields will be located together)
1240 // We temporarily store the allocation type in the offset field
1241 field->set_offset(atype);
1242 index++;
1243 }
1244 }
1246 // Now copy the fields' data from the temporary resource array.
1247 // Sometimes injected fields already exist in the Java source so
1248 // the fields array could be too long. In that case the
1249 // fields array is trimed. Also unused slots that were reserved
1250 // for generic signature indexes are discarded.
1251 Array<u2>* fields = MetadataFactory::new_array<u2>(
1252 loader_data, index * FieldInfo::field_slots + num_generic_signature,
1253 CHECK_NULL);
1254 {
1255 int i = 0;
1256 for (; i < index * FieldInfo::field_slots; i++) {
1257 fields->at_put(i, fa[i]);
1258 }
1259 for (int j = total_fields * FieldInfo::field_slots;
1260 j < generic_signature_slot; j++) {
1261 fields->at_put(i++, fa[j]);
1262 }
1263 assert(i == fields->length(), "");
1264 }
1266 if (_need_verify && length > 1) {
1267 // Check duplicated fields
1268 ResourceMark rm(THREAD);
1269 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1270 THREAD, NameSigHash*, HASH_ROW_SIZE);
1271 initialize_hashtable(names_and_sigs);
1272 bool dup = false;
1273 {
1274 debug_only(No_Safepoint_Verifier nsv;)
1275 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1276 Symbol* name = fs.name();
1277 Symbol* sig = fs.signature();
1278 // If no duplicates, add name/signature in hashtable names_and_sigs.
1279 if (!put_after_lookup(name, sig, names_and_sigs)) {
1280 dup = true;
1281 break;
1282 }
1283 }
1284 }
1285 if (dup) {
1286 classfile_parse_error("Duplicate field name&signature in class file %s",
1287 CHECK_NULL);
1288 }
1289 }
1291 return fields;
1292 }
1295 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1296 while (length-- > 0) {
1297 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1298 }
1299 }
1302 u2* ClassFileParser::parse_exception_table(ClassLoaderData* loader_data,
1303 u4 code_length,
1304 u4 exception_table_length,
1305 constantPoolHandle cp,
1306 TRAPS) {
1307 ClassFileStream* cfs = stream();
1309 u2* exception_table_start = cfs->get_u2_buffer();
1310 assert(exception_table_start != NULL, "null exception table");
1311 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1312 // Will check legal target after parsing code array in verifier.
1313 if (_need_verify) {
1314 for (unsigned int i = 0; i < exception_table_length; i++) {
1315 u2 start_pc = cfs->get_u2_fast();
1316 u2 end_pc = cfs->get_u2_fast();
1317 u2 handler_pc = cfs->get_u2_fast();
1318 u2 catch_type_index = cfs->get_u2_fast();
1319 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1320 "Illegal exception table range in class file %s",
1321 CHECK_NULL);
1322 guarantee_property(handler_pc < code_length,
1323 "Illegal exception table handler in class file %s",
1324 CHECK_NULL);
1325 if (catch_type_index != 0) {
1326 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1327 is_klass_reference(cp, catch_type_index),
1328 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1329 }
1330 }
1331 } else {
1332 cfs->skip_u2_fast(exception_table_length * 4);
1333 }
1334 return exception_table_start;
1335 }
1337 void ClassFileParser::parse_linenumber_table(
1338 u4 code_attribute_length, u4 code_length,
1339 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1340 ClassFileStream* cfs = stream();
1341 unsigned int num_entries = cfs->get_u2(CHECK);
1343 // Each entry is a u2 start_pc, and a u2 line_number
1344 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1346 // Verify line number attribute and table length
1347 check_property(
1348 code_attribute_length == sizeof(u2) + length_in_bytes,
1349 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1351 cfs->guarantee_more(length_in_bytes, CHECK);
1353 if ((*write_stream) == NULL) {
1354 if (length_in_bytes > fixed_buffer_size) {
1355 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1356 } else {
1357 (*write_stream) = new CompressedLineNumberWriteStream(
1358 linenumbertable_buffer, fixed_buffer_size);
1359 }
1360 }
1362 while (num_entries-- > 0) {
1363 u2 bci = cfs->get_u2_fast(); // start_pc
1364 u2 line = cfs->get_u2_fast(); // line_number
1365 guarantee_property(bci < code_length,
1366 "Invalid pc in LineNumberTable in class file %s", CHECK);
1367 (*write_stream)->write_pair(bci, line);
1368 }
1369 }
1372 // Class file LocalVariableTable elements.
1373 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1374 public:
1375 u2 start_bci;
1376 u2 length;
1377 u2 name_cp_index;
1378 u2 descriptor_cp_index;
1379 u2 slot;
1380 };
1383 class LVT_Hash: public CHeapObj<mtClass> {
1384 public:
1385 LocalVariableTableElement *_elem; // element
1386 LVT_Hash* _next; // Next entry in hash table
1387 };
1389 unsigned int hash(LocalVariableTableElement *elem) {
1390 unsigned int raw_hash = elem->start_bci;
1392 raw_hash = elem->length + raw_hash * 37;
1393 raw_hash = elem->name_cp_index + raw_hash * 37;
1394 raw_hash = elem->slot + raw_hash * 37;
1396 return raw_hash % HASH_ROW_SIZE;
1397 }
1399 void initialize_hashtable(LVT_Hash** table) {
1400 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1401 table[i] = NULL;
1402 }
1403 }
1405 void clear_hashtable(LVT_Hash** table) {
1406 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1407 LVT_Hash* current = table[i];
1408 LVT_Hash* next;
1409 while (current != NULL) {
1410 next = current->_next;
1411 current->_next = NULL;
1412 delete(current);
1413 current = next;
1414 }
1415 table[i] = NULL;
1416 }
1417 }
1419 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1420 LVT_Hash* entry = table[index];
1422 /*
1423 * 3-tuple start_bci/length/slot has to be unique key,
1424 * so the following comparison seems to be redundant:
1425 * && elem->name_cp_index == entry->_elem->name_cp_index
1426 */
1427 while (entry != NULL) {
1428 if (elem->start_bci == entry->_elem->start_bci
1429 && elem->length == entry->_elem->length
1430 && elem->name_cp_index == entry->_elem->name_cp_index
1431 && elem->slot == entry->_elem->slot
1432 ) {
1433 return entry;
1434 }
1435 entry = entry->_next;
1436 }
1437 return NULL;
1438 }
1440 // Return false if the local variable is found in table.
1441 // Return true if no duplicate is found.
1442 // And local variable is added as a new entry in table.
1443 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1444 // First lookup for duplicates
1445 int index = hash(elem);
1446 LVT_Hash* entry = LVT_lookup(elem, index, table);
1448 if (entry != NULL) {
1449 return false;
1450 }
1451 // No duplicate is found, allocate a new entry and fill it.
1452 if ((entry = new LVT_Hash()) == NULL) {
1453 return false;
1454 }
1455 entry->_elem = elem;
1457 // Insert into hash table
1458 entry->_next = table[index];
1459 table[index] = entry;
1461 return true;
1462 }
1464 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1465 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1466 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1467 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1468 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1469 lvt->signature_cp_index = 0;
1470 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1471 }
1473 // Function is used to parse both attributes:
1474 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1475 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1476 u2 max_locals,
1477 u4 code_attribute_length,
1478 constantPoolHandle cp,
1479 u2* localvariable_table_length,
1480 bool isLVTT,
1481 TRAPS) {
1482 ClassFileStream* cfs = stream();
1483 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1484 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1485 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1486 // Verify local variable table attribute has right length
1487 if (_need_verify) {
1488 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1489 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1490 }
1491 u2* localvariable_table_start = cfs->get_u2_buffer();
1492 assert(localvariable_table_start != NULL, "null local variable table");
1493 if (!_need_verify) {
1494 cfs->skip_u2_fast(size);
1495 } else {
1496 cfs->guarantee_more(size * 2, CHECK_NULL);
1497 for(int i = 0; i < (*localvariable_table_length); i++) {
1498 u2 start_pc = cfs->get_u2_fast();
1499 u2 length = cfs->get_u2_fast();
1500 u2 name_index = cfs->get_u2_fast();
1501 u2 descriptor_index = cfs->get_u2_fast();
1502 u2 index = cfs->get_u2_fast();
1503 // Assign to a u4 to avoid overflow
1504 u4 end_pc = (u4)start_pc + (u4)length;
1506 if (start_pc >= code_length) {
1507 classfile_parse_error(
1508 "Invalid start_pc %u in %s in class file %s",
1509 start_pc, tbl_name, CHECK_NULL);
1510 }
1511 if (end_pc > code_length) {
1512 classfile_parse_error(
1513 "Invalid length %u in %s in class file %s",
1514 length, tbl_name, CHECK_NULL);
1515 }
1516 int cp_size = cp->length();
1517 guarantee_property(
1518 valid_cp_range(name_index, cp_size) &&
1519 cp->tag_at(name_index).is_utf8(),
1520 "Name index %u in %s has bad constant type in class file %s",
1521 name_index, tbl_name, CHECK_NULL);
1522 guarantee_property(
1523 valid_cp_range(descriptor_index, cp_size) &&
1524 cp->tag_at(descriptor_index).is_utf8(),
1525 "Signature index %u in %s has bad constant type in class file %s",
1526 descriptor_index, tbl_name, CHECK_NULL);
1528 Symbol* name = cp->symbol_at(name_index);
1529 Symbol* sig = cp->symbol_at(descriptor_index);
1530 verify_legal_field_name(name, CHECK_NULL);
1531 u2 extra_slot = 0;
1532 if (!isLVTT) {
1533 verify_legal_field_signature(name, sig, CHECK_NULL);
1535 // 4894874: check special cases for double and long local variables
1536 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1537 sig == vmSymbols::type_signature(T_LONG)) {
1538 extra_slot = 1;
1539 }
1540 }
1541 guarantee_property((index + extra_slot) < max_locals,
1542 "Invalid index %u in %s in class file %s",
1543 index, tbl_name, CHECK_NULL);
1544 }
1545 }
1546 return localvariable_table_start;
1547 }
1550 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1551 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1552 ClassFileStream* cfs = stream();
1553 u2 index = 0; // index in the array with long/double occupying two slots
1554 u4 i1 = *u1_index;
1555 u4 i2 = *u2_index + 1;
1556 for(int i = 0; i < array_length; i++) {
1557 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1558 index++;
1559 if (tag == ITEM_Long || tag == ITEM_Double) {
1560 index++;
1561 } else if (tag == ITEM_Object) {
1562 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1563 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1564 is_klass_reference(cp, class_index),
1565 "Bad class index %u in StackMap in class file %s",
1566 class_index, CHECK);
1567 } else if (tag == ITEM_Uninitialized) {
1568 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1569 guarantee_property(
1570 offset < code_length,
1571 "Bad uninitialized type offset %u in StackMap in class file %s",
1572 offset, CHECK);
1573 } else {
1574 guarantee_property(
1575 tag <= (u1)ITEM_Uninitialized,
1576 "Unknown variable type %u in StackMap in class file %s",
1577 tag, CHECK);
1578 }
1579 }
1580 u2_array[*u2_index] = index;
1581 *u1_index = i1;
1582 *u2_index = i2;
1583 }
1585 Array<u1>* ClassFileParser::parse_stackmap_table(
1586 ClassLoaderData* loader_data,
1587 u4 code_attribute_length, TRAPS) {
1588 if (code_attribute_length == 0)
1589 return NULL;
1591 ClassFileStream* cfs = stream();
1592 u1* stackmap_table_start = cfs->get_u1_buffer();
1593 assert(stackmap_table_start != NULL, "null stackmap table");
1595 // check code_attribute_length first
1596 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1598 if (!_need_verify && !DumpSharedSpaces) {
1599 return NULL;
1600 }
1602 Array<u1>* stackmap_data =
1603 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL);
1605 memcpy((void*)stackmap_data->adr_at(0),
1606 (void*)stackmap_table_start, code_attribute_length);
1607 return stackmap_data;
1608 }
1610 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1611 u4 method_attribute_length,
1612 constantPoolHandle cp, TRAPS) {
1613 ClassFileStream* cfs = stream();
1614 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1615 *checked_exceptions_length = cfs->get_u2_fast();
1616 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1617 u2* checked_exceptions_start = cfs->get_u2_buffer();
1618 assert(checked_exceptions_start != NULL, "null checked exceptions");
1619 if (!_need_verify) {
1620 cfs->skip_u2_fast(size);
1621 } else {
1622 // Verify each value in the checked exception table
1623 u2 checked_exception;
1624 u2 len = *checked_exceptions_length;
1625 cfs->guarantee_more(2 * len, CHECK_NULL);
1626 for (int i = 0; i < len; i++) {
1627 checked_exception = cfs->get_u2_fast();
1628 check_property(
1629 valid_cp_range(checked_exception, cp->length()) &&
1630 is_klass_reference(cp, checked_exception),
1631 "Exception name has bad type at constant pool %u in class file %s",
1632 checked_exception, CHECK_NULL);
1633 }
1634 }
1635 // check exceptions attribute length
1636 if (_need_verify) {
1637 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1638 sizeof(u2) * size),
1639 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1640 }
1641 return checked_exceptions_start;
1642 }
1644 void ClassFileParser::throwIllegalSignature(
1645 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1646 ResourceMark rm(THREAD);
1647 Exceptions::fthrow(THREAD_AND_LOCATION,
1648 vmSymbols::java_lang_ClassFormatError(),
1649 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1650 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1651 }
1653 // Skip an annotation. Return >=limit if there is any problem.
1654 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1655 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1656 // value := switch (tag:u1) { ... }
1657 index += 2; // skip atype
1658 if ((index += 2) >= limit) return limit; // read nmem
1659 int nmem = Bytes::get_Java_u2(buffer+index-2);
1660 while (--nmem >= 0 && index < limit) {
1661 index += 2; // skip member
1662 index = skip_annotation_value(buffer, limit, index);
1663 }
1664 return index;
1665 }
1667 // Skip an annotation value. Return >=limit if there is any problem.
1668 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1669 // value := switch (tag:u1) {
1670 // case B, C, I, S, Z, D, F, J, c: con:u2;
1671 // case e: e_class:u2 e_name:u2;
1672 // case s: s_con:u2;
1673 // case [: do(nval:u2) {value};
1674 // case @: annotation;
1675 // case s: s_con:u2;
1676 // }
1677 if ((index += 1) >= limit) return limit; // read tag
1678 u1 tag = buffer[index-1];
1679 switch (tag) {
1680 case 'B': case 'C': case 'I': case 'S': case 'Z':
1681 case 'D': case 'F': case 'J': case 'c': case 's':
1682 index += 2; // skip con or s_con
1683 break;
1684 case 'e':
1685 index += 4; // skip e_class, e_name
1686 break;
1687 case '[':
1688 {
1689 if ((index += 2) >= limit) return limit; // read nval
1690 int nval = Bytes::get_Java_u2(buffer+index-2);
1691 while (--nval >= 0 && index < limit) {
1692 index = skip_annotation_value(buffer, limit, index);
1693 }
1694 }
1695 break;
1696 case '@':
1697 index = skip_annotation(buffer, limit, index);
1698 break;
1699 default:
1700 assert(false, "annotation tag");
1701 return limit; // bad tag byte
1702 }
1703 return index;
1704 }
1706 // Sift through annotations, looking for those significant to the VM:
1707 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1708 constantPoolHandle cp,
1709 ClassFileParser::AnnotationCollector* coll,
1710 TRAPS) {
1711 // annotations := do(nann:u2) {annotation}
1712 int index = 0;
1713 if ((index += 2) >= limit) return; // read nann
1714 int nann = Bytes::get_Java_u2(buffer+index-2);
1715 enum { // initial annotation layout
1716 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1717 count_off = 2, // u2 such as 1 (one value)
1718 member_off = 4, // utf8 such as 'value'
1719 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1720 e_tag_val = 'e',
1721 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1722 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1723 e_size = 11, // end of 'e' annotation
1724 c_tag_val = 'c',
1725 c_con_off = 7, // utf8 payload, such as 'I' or 'Ljava/lang/String;'
1726 c_size = 9, // end of 'c' annotation
1727 min_size = 6 // smallest possible size (zero members)
1728 };
1729 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1730 int index0 = index;
1731 index = skip_annotation(buffer, limit, index);
1732 u1* abase = buffer + index0;
1733 int atype = Bytes::get_Java_u2(abase + atype_off);
1734 int count = Bytes::get_Java_u2(abase + count_off);
1735 Symbol* aname = check_symbol_at(cp, atype);
1736 if (aname == NULL) break; // invalid annotation name
1737 Symbol* member = NULL;
1738 if (count >= 1) {
1739 int member_index = Bytes::get_Java_u2(abase + member_off);
1740 member = check_symbol_at(cp, member_index);
1741 if (member == NULL) break; // invalid member name
1742 }
1744 // Here is where parsing particular annotations will take place.
1745 AnnotationCollector::ID id = coll->annotation_index(aname);
1746 if (id == AnnotationCollector::_unknown) continue;
1747 coll->set_annotation(id);
1748 // If there are no values, just set the bit and move on:
1749 if (count == 0) continue;
1751 // For the record, here is how annotation payloads can be collected.
1752 // Suppose we want to capture @Retention.value. Here is how:
1753 //if (id == AnnotationCollector::_class_Retention) {
1754 // Symbol* payload = NULL;
1755 // if (count == 1
1756 // && e_size == (index0 - index) // match size
1757 // && e_tag_val == *(abase + tag_off)
1758 // && (check_symbol_at(cp, Bytes::get_Java_u2(abase + e_type_off))
1759 // == vmSymbols::RetentionPolicy_signature())
1760 // && member == vmSymbols::value_name()) {
1761 // payload = check_symbol_at(cp, Bytes::get_Java_u2(abase + e_con_off));
1762 // }
1763 // check_property(payload != NULL,
1764 // "Invalid @Retention annotation at offset %u in class file %s",
1765 // index0, CHECK);
1766 // if (payload != NULL) {
1767 // payload->increment_refcount();
1768 // coll->_class_RetentionPolicy = payload;
1769 // }
1770 //}
1771 }
1772 }
1774 ClassFileParser::AnnotationCollector::ID ClassFileParser::AnnotationCollector::annotation_index(Symbol* name) {
1775 vmSymbols::SID sid = vmSymbols::find_sid(name);
1776 switch (sid) {
1777 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1778 if (_location != _in_method) break; // only allow for methods
1779 return _method_ForceInline;
1780 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1781 if (_location != _in_method) break; // only allow for methods
1782 return _method_DontInline;
1783 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1784 if (_location != _in_method) break; // only allow for methods
1785 return _method_LambdaForm_Compiled;
1786 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1787 if (_location != _in_method) break; // only allow for methods
1788 return _method_LambdaForm_Hidden;
1789 default: break;
1790 }
1791 return AnnotationCollector::_unknown;
1792 }
1794 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1795 fatal("no field annotations yet");
1796 }
1798 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1799 if (has_annotation(_method_ForceInline))
1800 m->set_force_inline(true);
1801 if (has_annotation(_method_DontInline))
1802 m->set_dont_inline(true);
1803 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1804 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1805 if (has_annotation(_method_LambdaForm_Hidden))
1806 m->set_hidden(true);
1807 }
1809 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1810 fatal("no class annotations yet");
1811 }
1814 #define MAX_ARGS_SIZE 255
1815 #define MAX_CODE_SIZE 65535
1816 #define INITIAL_MAX_LVT_NUMBER 256
1818 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1819 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1820 // Method* to save footprint, so we only know the size of the resulting Method* when the
1821 // entire method attribute is parsed.
1822 //
1823 // The promoted_flags parameter is used to pass relevant access_flags
1824 // from the method back up to the containing klass. These flag values
1825 // are added to klass's access_flags.
1827 methodHandle ClassFileParser::parse_method(ClassLoaderData* loader_data,
1828 constantPoolHandle cp,
1829 bool is_interface,
1830 AccessFlags *promoted_flags,
1831 AnnotationArray** method_annotations,
1832 AnnotationArray** method_parameter_annotations,
1833 AnnotationArray** method_default_annotations,
1834 TRAPS) {
1835 ClassFileStream* cfs = stream();
1836 methodHandle nullHandle;
1837 ResourceMark rm(THREAD);
1838 // Parse fixed parts
1839 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1841 int flags = cfs->get_u2_fast();
1842 u2 name_index = cfs->get_u2_fast();
1843 int cp_size = cp->length();
1844 check_property(
1845 valid_cp_range(name_index, cp_size) &&
1846 cp->tag_at(name_index).is_utf8(),
1847 "Illegal constant pool index %u for method name in class file %s",
1848 name_index, CHECK_(nullHandle));
1849 Symbol* name = cp->symbol_at(name_index);
1850 verify_legal_method_name(name, CHECK_(nullHandle));
1852 u2 signature_index = cfs->get_u2_fast();
1853 guarantee_property(
1854 valid_cp_range(signature_index, cp_size) &&
1855 cp->tag_at(signature_index).is_utf8(),
1856 "Illegal constant pool index %u for method signature in class file %s",
1857 signature_index, CHECK_(nullHandle));
1858 Symbol* signature = cp->symbol_at(signature_index);
1860 AccessFlags access_flags;
1861 if (name == vmSymbols::class_initializer_name()) {
1862 // We ignore the other access flags for a valid class initializer.
1863 // (JVM Spec 2nd ed., chapter 4.6)
1864 if (_major_version < 51) { // backward compatibility
1865 flags = JVM_ACC_STATIC;
1866 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1867 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1868 }
1869 } else {
1870 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1871 }
1873 int args_size = -1; // only used when _need_verify is true
1874 if (_need_verify) {
1875 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1876 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1877 if (args_size > MAX_ARGS_SIZE) {
1878 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1879 }
1880 }
1882 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1884 // Default values for code and exceptions attribute elements
1885 u2 max_stack = 0;
1886 u2 max_locals = 0;
1887 u4 code_length = 0;
1888 u1* code_start = 0;
1889 u2 exception_table_length = 0;
1890 u2* exception_table_start = NULL;
1891 Array<int>* exception_handlers = Universe::the_empty_int_array();
1892 u2 checked_exceptions_length = 0;
1893 u2* checked_exceptions_start = NULL;
1894 CompressedLineNumberWriteStream* linenumber_table = NULL;
1895 int linenumber_table_length = 0;
1896 int total_lvt_length = 0;
1897 u2 lvt_cnt = 0;
1898 u2 lvtt_cnt = 0;
1899 bool lvt_allocated = false;
1900 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1901 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1902 u2* localvariable_table_length;
1903 u2** localvariable_table_start;
1904 u2* localvariable_type_table_length;
1905 u2** localvariable_type_table_start;
1906 bool parsed_code_attribute = false;
1907 bool parsed_checked_exceptions_attribute = false;
1908 bool parsed_stackmap_attribute = false;
1909 // stackmap attribute - JDK1.5
1910 Array<u1>* stackmap_data = NULL;
1911 u2 generic_signature_index = 0;
1912 MethodAnnotationCollector parsed_annotations;
1913 u1* runtime_visible_annotations = NULL;
1914 int runtime_visible_annotations_length = 0;
1915 u1* runtime_invisible_annotations = NULL;
1916 int runtime_invisible_annotations_length = 0;
1917 u1* runtime_visible_parameter_annotations = NULL;
1918 int runtime_visible_parameter_annotations_length = 0;
1919 u1* runtime_invisible_parameter_annotations = NULL;
1920 int runtime_invisible_parameter_annotations_length = 0;
1921 u1* annotation_default = NULL;
1922 int annotation_default_length = 0;
1924 // Parse code and exceptions attribute
1925 u2 method_attributes_count = cfs->get_u2_fast();
1926 while (method_attributes_count--) {
1927 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1928 u2 method_attribute_name_index = cfs->get_u2_fast();
1929 u4 method_attribute_length = cfs->get_u4_fast();
1930 check_property(
1931 valid_cp_range(method_attribute_name_index, cp_size) &&
1932 cp->tag_at(method_attribute_name_index).is_utf8(),
1933 "Invalid method attribute name index %u in class file %s",
1934 method_attribute_name_index, CHECK_(nullHandle));
1936 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1937 if (method_attribute_name == vmSymbols::tag_code()) {
1938 // Parse Code attribute
1939 if (_need_verify) {
1940 guarantee_property(
1941 !access_flags.is_native() && !access_flags.is_abstract(),
1942 "Code attribute in native or abstract methods in class file %s",
1943 CHECK_(nullHandle));
1944 }
1945 if (parsed_code_attribute) {
1946 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1947 }
1948 parsed_code_attribute = true;
1950 // Stack size, locals size, and code size
1951 if (_major_version == 45 && _minor_version <= 2) {
1952 cfs->guarantee_more(4, CHECK_(nullHandle));
1953 max_stack = cfs->get_u1_fast();
1954 max_locals = cfs->get_u1_fast();
1955 code_length = cfs->get_u2_fast();
1956 } else {
1957 cfs->guarantee_more(8, CHECK_(nullHandle));
1958 max_stack = cfs->get_u2_fast();
1959 max_locals = cfs->get_u2_fast();
1960 code_length = cfs->get_u4_fast();
1961 }
1962 if (_need_verify) {
1963 guarantee_property(args_size <= max_locals,
1964 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1965 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1966 "Invalid method Code length %u in class file %s",
1967 code_length, CHECK_(nullHandle));
1968 }
1969 // Code pointer
1970 code_start = cfs->get_u1_buffer();
1971 assert(code_start != NULL, "null code start");
1972 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1973 cfs->skip_u1_fast(code_length);
1975 // Exception handler table
1976 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1977 exception_table_length = cfs->get_u2_fast();
1978 if (exception_table_length > 0) {
1979 exception_table_start =
1980 parse_exception_table(loader_data, code_length, exception_table_length, cp, CHECK_(nullHandle));
1981 }
1983 // Parse additional attributes in code attribute
1984 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1985 u2 code_attributes_count = cfs->get_u2_fast();
1987 unsigned int calculated_attribute_length = 0;
1989 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1990 calculated_attribute_length =
1991 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1992 } else {
1993 // max_stack, locals and length are smaller in pre-version 45.2 classes
1994 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1995 }
1996 calculated_attribute_length +=
1997 code_length +
1998 sizeof(exception_table_length) +
1999 sizeof(code_attributes_count) +
2000 exception_table_length *
2001 ( sizeof(u2) + // start_pc
2002 sizeof(u2) + // end_pc
2003 sizeof(u2) + // handler_pc
2004 sizeof(u2) ); // catch_type_index
2006 while (code_attributes_count--) {
2007 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
2008 u2 code_attribute_name_index = cfs->get_u2_fast();
2009 u4 code_attribute_length = cfs->get_u4_fast();
2010 calculated_attribute_length += code_attribute_length +
2011 sizeof(code_attribute_name_index) +
2012 sizeof(code_attribute_length);
2013 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
2014 cp->tag_at(code_attribute_name_index).is_utf8(),
2015 "Invalid code attribute name index %u in class file %s",
2016 code_attribute_name_index,
2017 CHECK_(nullHandle));
2018 if (LoadLineNumberTables &&
2019 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2020 // Parse and compress line number table
2021 parse_linenumber_table(code_attribute_length, code_length,
2022 &linenumber_table, CHECK_(nullHandle));
2024 } else if (LoadLocalVariableTables &&
2025 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2026 // Parse local variable table
2027 if (!lvt_allocated) {
2028 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2029 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2030 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2031 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2032 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2033 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2034 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2035 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2036 lvt_allocated = true;
2037 }
2038 if (lvt_cnt == max_lvt_cnt) {
2039 max_lvt_cnt <<= 1;
2040 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2041 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2042 }
2043 localvariable_table_start[lvt_cnt] =
2044 parse_localvariable_table(code_length,
2045 max_locals,
2046 code_attribute_length,
2047 cp,
2048 &localvariable_table_length[lvt_cnt],
2049 false, // is not LVTT
2050 CHECK_(nullHandle));
2051 total_lvt_length += localvariable_table_length[lvt_cnt];
2052 lvt_cnt++;
2053 } else if (LoadLocalVariableTypeTables &&
2054 _major_version >= JAVA_1_5_VERSION &&
2055 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2056 if (!lvt_allocated) {
2057 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2058 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2059 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2060 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2061 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2062 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2063 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2064 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2065 lvt_allocated = true;
2066 }
2067 // Parse local variable type table
2068 if (lvtt_cnt == max_lvtt_cnt) {
2069 max_lvtt_cnt <<= 1;
2070 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2071 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2072 }
2073 localvariable_type_table_start[lvtt_cnt] =
2074 parse_localvariable_table(code_length,
2075 max_locals,
2076 code_attribute_length,
2077 cp,
2078 &localvariable_type_table_length[lvtt_cnt],
2079 true, // is LVTT
2080 CHECK_(nullHandle));
2081 lvtt_cnt++;
2082 } else if (UseSplitVerifier &&
2083 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2084 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2085 // Stack map is only needed by the new verifier in JDK1.5.
2086 if (parsed_stackmap_attribute) {
2087 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2088 }
2089 stackmap_data = parse_stackmap_table(loader_data, code_attribute_length, CHECK_(nullHandle));
2090 parsed_stackmap_attribute = true;
2091 } else {
2092 // Skip unknown attributes
2093 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2094 }
2095 }
2096 // check method attribute length
2097 if (_need_verify) {
2098 guarantee_property(method_attribute_length == calculated_attribute_length,
2099 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2100 }
2101 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2102 // Parse Exceptions attribute
2103 if (parsed_checked_exceptions_attribute) {
2104 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2105 }
2106 parsed_checked_exceptions_attribute = true;
2107 checked_exceptions_start =
2108 parse_checked_exceptions(&checked_exceptions_length,
2109 method_attribute_length,
2110 cp, CHECK_(nullHandle));
2111 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2112 if (method_attribute_length != 0) {
2113 classfile_parse_error(
2114 "Invalid Synthetic method attribute length %u in class file %s",
2115 method_attribute_length, CHECK_(nullHandle));
2116 }
2117 // Should we check that there hasn't already been a synthetic attribute?
2118 access_flags.set_is_synthetic();
2119 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2120 if (method_attribute_length != 0) {
2121 classfile_parse_error(
2122 "Invalid Deprecated method attribute length %u in class file %s",
2123 method_attribute_length, CHECK_(nullHandle));
2124 }
2125 } else if (_major_version >= JAVA_1_5_VERSION) {
2126 if (method_attribute_name == vmSymbols::tag_signature()) {
2127 if (method_attribute_length != 2) {
2128 classfile_parse_error(
2129 "Invalid Signature attribute length %u in class file %s",
2130 method_attribute_length, CHECK_(nullHandle));
2131 }
2132 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
2133 generic_signature_index = cfs->get_u2_fast();
2134 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2135 runtime_visible_annotations_length = method_attribute_length;
2136 runtime_visible_annotations = cfs->get_u1_buffer();
2137 assert(runtime_visible_annotations != NULL, "null visible annotations");
2138 parse_annotations(runtime_visible_annotations,
2139 runtime_visible_annotations_length, cp, &parsed_annotations,
2140 CHECK_(nullHandle));
2141 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2142 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2143 runtime_invisible_annotations_length = method_attribute_length;
2144 runtime_invisible_annotations = cfs->get_u1_buffer();
2145 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2146 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
2147 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2148 runtime_visible_parameter_annotations_length = method_attribute_length;
2149 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2150 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2151 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2152 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2153 runtime_invisible_parameter_annotations_length = method_attribute_length;
2154 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2155 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2156 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
2157 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2158 annotation_default_length = method_attribute_length;
2159 annotation_default = cfs->get_u1_buffer();
2160 assert(annotation_default != NULL, "null annotation default");
2161 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2162 } else {
2163 // Skip unknown attributes
2164 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2165 }
2166 } else {
2167 // Skip unknown attributes
2168 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2169 }
2170 }
2172 if (linenumber_table != NULL) {
2173 linenumber_table->write_terminator();
2174 linenumber_table_length = linenumber_table->position();
2175 }
2177 // Make sure there's at least one Code attribute in non-native/non-abstract method
2178 if (_need_verify) {
2179 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2180 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2181 }
2183 // All sizing information for a Method* is finally available, now create it
2184 Method* m = Method::allocate(
2185 loader_data, code_length, access_flags, linenumber_table_length,
2186 total_lvt_length, exception_table_length, checked_exceptions_length,
2187 generic_signature_index, ConstMethod::NORMAL, CHECK_(nullHandle));
2189 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2191 // Fill in information from fixed part (access_flags already set)
2192 m->set_constants(cp());
2193 m->set_name_index(name_index);
2194 m->set_signature_index(signature_index);
2195 #ifdef CC_INTERP
2196 // hmm is there a gc issue here??
2197 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2198 m->set_result_index(rtf.type());
2199 #endif
2201 if (args_size >= 0) {
2202 m->set_size_of_parameters(args_size);
2203 } else {
2204 m->compute_size_of_parameters(THREAD);
2205 }
2206 #ifdef ASSERT
2207 if (args_size >= 0) {
2208 m->compute_size_of_parameters(THREAD);
2209 assert(args_size == m->size_of_parameters(), "");
2210 }
2211 #endif
2213 // Fill in code attribute information
2214 m->set_max_stack(max_stack);
2215 m->set_max_locals(max_locals);
2216 m->constMethod()->set_stackmap_data(stackmap_data);
2218 // Copy byte codes
2219 m->set_code(code_start);
2221 // Copy line number table
2222 if (linenumber_table != NULL) {
2223 memcpy(m->compressed_linenumber_table(),
2224 linenumber_table->buffer(), linenumber_table_length);
2225 }
2227 // Copy exception table
2228 if (exception_table_length > 0) {
2229 int size =
2230 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2231 copy_u2_with_conversion((u2*) m->exception_table_start(),
2232 exception_table_start, size);
2233 }
2235 // Copy checked exceptions
2236 if (checked_exceptions_length > 0) {
2237 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2238 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2239 }
2241 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2242 *
2243 * Rules for LVT's and LVTT's are:
2244 * - There can be any number of LVT's and LVTT's.
2245 * - If there are n LVT's, it is the same as if there was just
2246 * one LVT containing all the entries from the n LVT's.
2247 * - There may be no more than one LVT entry per local variable.
2248 * Two LVT entries are 'equal' if these fields are the same:
2249 * start_pc, length, name, slot
2250 * - There may be no more than one LVTT entry per each LVT entry.
2251 * Each LVTT entry has to match some LVT entry.
2252 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2253 */
2254 if (total_lvt_length > 0) {
2255 int tbl_no, idx;
2257 promoted_flags->set_has_localvariable_table();
2259 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2260 initialize_hashtable(lvt_Hash);
2262 // To fill LocalVariableTable in
2263 Classfile_LVT_Element* cf_lvt;
2264 LocalVariableTableElement* lvt = m->localvariable_table_start();
2266 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2267 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2268 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2269 copy_lvt_element(&cf_lvt[idx], lvt);
2270 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2271 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2272 && _need_verify
2273 && _major_version >= JAVA_1_5_VERSION ) {
2274 clear_hashtable(lvt_Hash);
2275 classfile_parse_error("Duplicated LocalVariableTable attribute "
2276 "entry for '%s' in class file %s",
2277 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2278 CHECK_(nullHandle));
2279 }
2280 }
2281 }
2283 // To merge LocalVariableTable and LocalVariableTypeTable
2284 Classfile_LVT_Element* cf_lvtt;
2285 LocalVariableTableElement lvtt_elem;
2287 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2288 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2289 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2290 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2291 int index = hash(&lvtt_elem);
2292 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2293 if (entry == NULL) {
2294 if (_need_verify) {
2295 clear_hashtable(lvt_Hash);
2296 classfile_parse_error("LVTT entry for '%s' in class file %s "
2297 "does not match any LVT entry",
2298 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2299 CHECK_(nullHandle));
2300 }
2301 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2302 clear_hashtable(lvt_Hash);
2303 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2304 "entry for '%s' in class file %s",
2305 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2306 CHECK_(nullHandle));
2307 } else {
2308 // to add generic signatures into LocalVariableTable
2309 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2310 }
2311 }
2312 }
2313 clear_hashtable(lvt_Hash);
2314 }
2316 if (parsed_annotations.has_any_annotations())
2317 parsed_annotations.apply_to(m);
2318 *method_annotations = assemble_annotations(loader_data,
2319 runtime_visible_annotations,
2320 runtime_visible_annotations_length,
2321 runtime_invisible_annotations,
2322 runtime_invisible_annotations_length,
2323 CHECK_(nullHandle));
2324 *method_parameter_annotations = assemble_annotations(loader_data,
2325 runtime_visible_parameter_annotations,
2326 runtime_visible_parameter_annotations_length,
2327 runtime_invisible_parameter_annotations,
2328 runtime_invisible_parameter_annotations_length,
2329 CHECK_(nullHandle));
2330 *method_default_annotations = assemble_annotations(loader_data,
2331 annotation_default,
2332 annotation_default_length,
2333 NULL,
2334 0,
2335 CHECK_(nullHandle));
2337 if (name == vmSymbols::finalize_method_name() &&
2338 signature == vmSymbols::void_method_signature()) {
2339 if (m->is_empty_method()) {
2340 _has_empty_finalizer = true;
2341 } else {
2342 _has_finalizer = true;
2343 }
2344 }
2345 if (name == vmSymbols::object_initializer_name() &&
2346 signature == vmSymbols::void_method_signature() &&
2347 m->is_vanilla_constructor()) {
2348 _has_vanilla_constructor = true;
2349 }
2351 return m;
2352 }
2355 // The promoted_flags parameter is used to pass relevant access_flags
2356 // from the methods back up to the containing klass. These flag values
2357 // are added to klass's access_flags.
2359 Array<Method*>* ClassFileParser::parse_methods(ClassLoaderData* loader_data,
2360 constantPoolHandle cp,
2361 bool is_interface,
2362 AccessFlags* promoted_flags,
2363 bool* has_final_method,
2364 Array<AnnotationArray*>** methods_annotations,
2365 Array<AnnotationArray*>** methods_parameter_annotations,
2366 Array<AnnotationArray*>** methods_default_annotations,
2367 bool* has_default_methods,
2368 TRAPS) {
2369 ClassFileStream* cfs = stream();
2370 AnnotationArray* method_annotations = NULL;
2371 AnnotationArray* method_parameter_annotations = NULL;
2372 AnnotationArray* method_default_annotations = NULL;
2373 cfs->guarantee_more(2, CHECK_NULL); // length
2374 u2 length = cfs->get_u2_fast();
2375 if (length == 0) {
2376 return Universe::the_empty_method_array();
2377 } else {
2378 // FIXME: Handle leaks at later failures.
2379 Array<Method*>* methods = MetadataFactory::new_array<Method*>(loader_data, length, NULL, CHECK_NULL);
2381 HandleMark hm(THREAD);
2382 for (int index = 0; index < length; index++) {
2383 methodHandle method = parse_method(loader_data,
2384 cp, is_interface,
2385 promoted_flags,
2386 &method_annotations,
2387 &method_parameter_annotations,
2388 &method_default_annotations,
2389 CHECK_NULL);
2391 if (method->is_final()) {
2392 *has_final_method = true;
2393 }
2394 if (is_interface && !method->is_abstract() && !method->is_static()) {
2395 // default method
2396 *has_default_methods = true;
2397 }
2398 methods->at_put(index, method());
2399 if (*methods_annotations == NULL) {
2400 *methods_annotations =
2401 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2402 }
2403 (*methods_annotations)->at_put(index, method_annotations);
2404 if (*methods_parameter_annotations == NULL) {
2405 *methods_parameter_annotations =
2406 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2407 }
2408 (*methods_parameter_annotations)->at_put(index, method_parameter_annotations);
2409 if (*methods_default_annotations == NULL) {
2410 *methods_default_annotations =
2411 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2412 }
2413 (*methods_default_annotations)->at_put(index, method_default_annotations);
2414 }
2415 if (_need_verify && length > 1) {
2416 // Check duplicated methods
2417 ResourceMark rm(THREAD);
2418 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2419 THREAD, NameSigHash*, HASH_ROW_SIZE);
2420 initialize_hashtable(names_and_sigs);
2421 bool dup = false;
2422 {
2423 debug_only(No_Safepoint_Verifier nsv;)
2424 for (int i = 0; i < length; i++) {
2425 Method* m = methods->at(i);
2426 // If no duplicates, add name/signature in hashtable names_and_sigs.
2427 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2428 dup = true;
2429 break;
2430 }
2431 }
2432 }
2433 if (dup) {
2434 classfile_parse_error("Duplicate method name&signature in class file %s",
2435 CHECK_NULL);
2436 }
2437 }
2438 return methods;
2439 }
2440 }
2443 Array<int>* ClassFileParser::sort_methods(ClassLoaderData* loader_data,
2444 Array<Method*>* methods,
2445 Array<AnnotationArray*>* methods_annotations,
2446 Array<AnnotationArray*>* methods_parameter_annotations,
2447 Array<AnnotationArray*>* methods_default_annotations,
2448 TRAPS) {
2449 int length = methods->length();
2450 // If JVMTI original method ordering or sharing is enabled we have to
2451 // remember the original class file ordering.
2452 // We temporarily use the vtable_index field in the Method* to store the
2453 // class file index, so we can read in after calling qsort.
2454 // Put the method ordering in the shared archive.
2455 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2456 for (int index = 0; index < length; index++) {
2457 Method* m = methods->at(index);
2458 assert(!m->valid_vtable_index(), "vtable index should not be set");
2459 m->set_vtable_index(index);
2460 }
2461 }
2462 // Sort method array by ascending method name (for faster lookups & vtable construction)
2463 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2464 Method::sort_methods(methods, methods_annotations,
2465 methods_parameter_annotations,
2466 methods_default_annotations);
2468 // If JVMTI original method ordering or sharing is enabled construct int
2469 // array remembering the original ordering
2470 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2471 Array<int>* method_ordering = MetadataFactory::new_array<int>(loader_data, length, CHECK_NULL);
2472 for (int index = 0; index < length; index++) {
2473 Method* m = methods->at(index);
2474 int old_index = m->vtable_index();
2475 assert(old_index >= 0 && old_index < length, "invalid method index");
2476 method_ordering->at_put(index, old_index);
2477 m->set_vtable_index(Method::invalid_vtable_index);
2478 }
2479 return method_ordering;
2480 } else {
2481 return Universe::the_empty_int_array();
2482 }
2483 }
2486 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS) {
2487 ClassFileStream* cfs = stream();
2488 cfs->guarantee_more(2, CHECK); // sourcefile_index
2489 u2 sourcefile_index = cfs->get_u2_fast();
2490 check_property(
2491 valid_cp_range(sourcefile_index, cp->length()) &&
2492 cp->tag_at(sourcefile_index).is_utf8(),
2493 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2494 sourcefile_index, CHECK);
2495 set_class_sourcefile(cp->symbol_at(sourcefile_index));
2496 }
2500 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2501 int length, TRAPS) {
2502 ClassFileStream* cfs = stream();
2503 u1* sde_buffer = cfs->get_u1_buffer();
2504 assert(sde_buffer != NULL, "null sde buffer");
2506 // Don't bother storing it if there is no way to retrieve it
2507 if (JvmtiExport::can_get_source_debug_extension()) {
2508 assert((length+1) > length, "Overflow checking");
2509 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2510 for (int i = 0; i < length; i++) {
2511 sde[i] = sde_buffer[i];
2512 }
2513 sde[length] = '\0';
2514 set_class_sde_buffer((char*)sde, length);
2515 }
2516 // Got utf8 string, set stream position forward
2517 cfs->skip_u1(length, CHECK);
2518 }
2521 // Inner classes can be static, private or protected (classic VM does this)
2522 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2524 // Return number of classes in the inner classes attribute table
2525 u2 ClassFileParser::parse_classfile_inner_classes_attribute(ClassLoaderData* loader_data,
2526 u1* inner_classes_attribute_start,
2527 bool parsed_enclosingmethod_attribute,
2528 u2 enclosing_method_class_index,
2529 u2 enclosing_method_method_index,
2530 constantPoolHandle cp,
2531 TRAPS) {
2532 ClassFileStream* cfs = stream();
2533 u1* current_mark = cfs->current();
2534 u2 length = 0;
2535 if (inner_classes_attribute_start != NULL) {
2536 cfs->set_current(inner_classes_attribute_start);
2537 cfs->guarantee_more(2, CHECK_0); // length
2538 length = cfs->get_u2_fast();
2539 }
2541 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2542 // method data:
2543 // [inner_class_info_index,
2544 // outer_class_info_index,
2545 // inner_name_index,
2546 // inner_class_access_flags,
2547 // ...
2548 // enclosing_method_class_index,
2549 // enclosing_method_method_index]
2550 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2551 // FIXME: Will leak on exceptions.
2552 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(loader_data, size, CHECK_0);
2553 int index = 0;
2554 int cp_size = cp->length();
2555 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2556 for (int n = 0; n < length; n++) {
2557 // Inner class index
2558 u2 inner_class_info_index = cfs->get_u2_fast();
2559 check_property(
2560 inner_class_info_index == 0 ||
2561 (valid_cp_range(inner_class_info_index, cp_size) &&
2562 is_klass_reference(cp, inner_class_info_index)),
2563 "inner_class_info_index %u has bad constant type in class file %s",
2564 inner_class_info_index, CHECK_0);
2565 // Outer class index
2566 u2 outer_class_info_index = cfs->get_u2_fast();
2567 check_property(
2568 outer_class_info_index == 0 ||
2569 (valid_cp_range(outer_class_info_index, cp_size) &&
2570 is_klass_reference(cp, outer_class_info_index)),
2571 "outer_class_info_index %u has bad constant type in class file %s",
2572 outer_class_info_index, CHECK_0);
2573 // Inner class name
2574 u2 inner_name_index = cfs->get_u2_fast();
2575 check_property(
2576 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2577 cp->tag_at(inner_name_index).is_utf8()),
2578 "inner_name_index %u has bad constant type in class file %s",
2579 inner_name_index, CHECK_0);
2580 if (_need_verify) {
2581 guarantee_property(inner_class_info_index != outer_class_info_index,
2582 "Class is both outer and inner class in class file %s", CHECK_0);
2583 }
2584 // Access flags
2585 AccessFlags inner_access_flags;
2586 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2587 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2588 // Set abstract bit for old class files for backward compatibility
2589 flags |= JVM_ACC_ABSTRACT;
2590 }
2591 verify_legal_class_modifiers(flags, CHECK_0);
2592 inner_access_flags.set_flags(flags);
2594 inner_classes->at_put(index++, inner_class_info_index);
2595 inner_classes->at_put(index++, outer_class_info_index);
2596 inner_classes->at_put(index++, inner_name_index);
2597 inner_classes->at_put(index++, inner_access_flags.as_short());
2598 }
2600 // 4347400: make sure there's no duplicate entry in the classes array
2601 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2602 for(int i = 0; i < length * 4; i += 4) {
2603 for(int j = i + 4; j < length * 4; j += 4) {
2604 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2605 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2606 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2607 inner_classes->at(i+3) != inner_classes->at(j+3)),
2608 "Duplicate entry in InnerClasses in class file %s",
2609 CHECK_0);
2610 }
2611 }
2612 }
2614 // Set EnclosingMethod class and method indexes.
2615 if (parsed_enclosingmethod_attribute) {
2616 inner_classes->at_put(index++, enclosing_method_class_index);
2617 inner_classes->at_put(index++, enclosing_method_method_index);
2618 }
2619 assert(index == size, "wrong size");
2621 // Update InstanceKlass with inner class info.
2622 set_class_inner_classes(inner_classes);
2624 // Restore buffer's current position.
2625 cfs->set_current(current_mark);
2627 return length;
2628 }
2630 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS) {
2631 set_class_synthetic_flag(true);
2632 }
2634 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS) {
2635 ClassFileStream* cfs = stream();
2636 u2 signature_index = cfs->get_u2(CHECK);
2637 check_property(
2638 valid_cp_range(signature_index, cp->length()) &&
2639 cp->tag_at(signature_index).is_utf8(),
2640 "Invalid constant pool index %u in Signature attribute in class file %s",
2641 signature_index, CHECK);
2642 set_class_generic_signature(cp->symbol_at(signature_index));
2643 }
2645 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(ClassLoaderData* loader_data,
2646 constantPoolHandle cp,
2647 u4 attribute_byte_length, TRAPS) {
2648 ClassFileStream* cfs = stream();
2649 u1* current_start = cfs->current();
2651 cfs->guarantee_more(2, CHECK); // length
2652 int attribute_array_length = cfs->get_u2_fast();
2654 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2655 "Short length on BootstrapMethods in class file %s",
2656 CHECK);
2658 // The attribute contains a counted array of counted tuples of shorts,
2659 // represending bootstrap specifiers:
2660 // length*{bootstrap_method_index, argument_count*{argument_index}}
2661 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2662 // operand_count = number of shorts in attr, except for leading length
2664 // The attribute is copied into a short[] array.
2665 // The array begins with a series of short[2] pairs, one for each tuple.
2666 int index_size = (attribute_array_length * 2);
2668 Array<u2>* operands = MetadataFactory::new_array<u2>(loader_data, index_size + operand_count, CHECK);
2670 int operand_fill_index = index_size;
2671 int cp_size = cp->length();
2673 for (int n = 0; n < attribute_array_length; n++) {
2674 // Store a 32-bit offset into the header of the operand array.
2675 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2677 // Read a bootstrap specifier.
2678 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2679 u2 bootstrap_method_index = cfs->get_u2_fast();
2680 u2 argument_count = cfs->get_u2_fast();
2681 check_property(
2682 valid_cp_range(bootstrap_method_index, cp_size) &&
2683 cp->tag_at(bootstrap_method_index).is_method_handle(),
2684 "bootstrap_method_index %u has bad constant type in class file %s",
2685 bootstrap_method_index,
2686 CHECK);
2687 operands->at_put(operand_fill_index++, bootstrap_method_index);
2688 operands->at_put(operand_fill_index++, argument_count);
2690 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2691 for (int j = 0; j < argument_count; j++) {
2692 u2 argument_index = cfs->get_u2_fast();
2693 check_property(
2694 valid_cp_range(argument_index, cp_size) &&
2695 cp->tag_at(argument_index).is_loadable_constant(),
2696 "argument_index %u has bad constant type in class file %s",
2697 argument_index,
2698 CHECK);
2699 operands->at_put(operand_fill_index++, argument_index);
2700 }
2701 }
2703 assert(operand_fill_index == operands->length(), "exact fill");
2704 assert(ConstantPool::operand_array_length(operands) == attribute_array_length, "correct decode");
2706 u1* current_end = cfs->current();
2707 guarantee_property(current_end == current_start + attribute_byte_length,
2708 "Bad length on BootstrapMethods in class file %s",
2709 CHECK);
2711 cp->set_operands(operands);
2712 }
2714 void ClassFileParser::parse_classfile_attributes(ClassLoaderData* loader_data,
2715 constantPoolHandle cp,
2716 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2717 TRAPS) {
2718 ClassFileStream* cfs = stream();
2719 // Set inner classes attribute to default sentinel
2720 set_class_inner_classes(Universe::the_empty_short_array());
2721 cfs->guarantee_more(2, CHECK); // attributes_count
2722 u2 attributes_count = cfs->get_u2_fast();
2723 bool parsed_sourcefile_attribute = false;
2724 bool parsed_innerclasses_attribute = false;
2725 bool parsed_enclosingmethod_attribute = false;
2726 bool parsed_bootstrap_methods_attribute = false;
2727 u1* runtime_visible_annotations = NULL;
2728 int runtime_visible_annotations_length = 0;
2729 u1* runtime_invisible_annotations = NULL;
2730 int runtime_invisible_annotations_length = 0;
2731 u1* inner_classes_attribute_start = NULL;
2732 u4 inner_classes_attribute_length = 0;
2733 u2 enclosing_method_class_index = 0;
2734 u2 enclosing_method_method_index = 0;
2735 // Iterate over attributes
2736 while (attributes_count--) {
2737 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2738 u2 attribute_name_index = cfs->get_u2_fast();
2739 u4 attribute_length = cfs->get_u4_fast();
2740 check_property(
2741 valid_cp_range(attribute_name_index, cp->length()) &&
2742 cp->tag_at(attribute_name_index).is_utf8(),
2743 "Attribute name has bad constant pool index %u in class file %s",
2744 attribute_name_index, CHECK);
2745 Symbol* tag = cp->symbol_at(attribute_name_index);
2746 if (tag == vmSymbols::tag_source_file()) {
2747 // Check for SourceFile tag
2748 if (_need_verify) {
2749 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2750 }
2751 if (parsed_sourcefile_attribute) {
2752 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2753 } else {
2754 parsed_sourcefile_attribute = true;
2755 }
2756 parse_classfile_sourcefile_attribute(cp, CHECK);
2757 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2758 // Check for SourceDebugExtension tag
2759 parse_classfile_source_debug_extension_attribute(cp, (int)attribute_length, CHECK);
2760 } else if (tag == vmSymbols::tag_inner_classes()) {
2761 // Check for InnerClasses tag
2762 if (parsed_innerclasses_attribute) {
2763 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2764 } else {
2765 parsed_innerclasses_attribute = true;
2766 }
2767 inner_classes_attribute_start = cfs->get_u1_buffer();
2768 inner_classes_attribute_length = attribute_length;
2769 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2770 } else if (tag == vmSymbols::tag_synthetic()) {
2771 // Check for Synthetic tag
2772 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2773 if (attribute_length != 0) {
2774 classfile_parse_error(
2775 "Invalid Synthetic classfile attribute length %u in class file %s",
2776 attribute_length, CHECK);
2777 }
2778 parse_classfile_synthetic_attribute(cp, CHECK);
2779 } else if (tag == vmSymbols::tag_deprecated()) {
2780 // Check for Deprecatd tag - 4276120
2781 if (attribute_length != 0) {
2782 classfile_parse_error(
2783 "Invalid Deprecated classfile attribute length %u in class file %s",
2784 attribute_length, CHECK);
2785 }
2786 } else if (_major_version >= JAVA_1_5_VERSION) {
2787 if (tag == vmSymbols::tag_signature()) {
2788 if (attribute_length != 2) {
2789 classfile_parse_error(
2790 "Wrong Signature attribute length %u in class file %s",
2791 attribute_length, CHECK);
2792 }
2793 parse_classfile_signature_attribute(cp, CHECK);
2794 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2795 runtime_visible_annotations_length = attribute_length;
2796 runtime_visible_annotations = cfs->get_u1_buffer();
2797 assert(runtime_visible_annotations != NULL, "null visible annotations");
2798 parse_annotations(runtime_visible_annotations,
2799 runtime_visible_annotations_length,
2800 cp,
2801 parsed_annotations,
2802 CHECK);
2803 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2804 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2805 runtime_invisible_annotations_length = attribute_length;
2806 runtime_invisible_annotations = cfs->get_u1_buffer();
2807 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2808 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2809 } else if (tag == vmSymbols::tag_enclosing_method()) {
2810 if (parsed_enclosingmethod_attribute) {
2811 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2812 } else {
2813 parsed_enclosingmethod_attribute = true;
2814 }
2815 cfs->guarantee_more(4, CHECK); // class_index, method_index
2816 enclosing_method_class_index = cfs->get_u2_fast();
2817 enclosing_method_method_index = cfs->get_u2_fast();
2818 if (enclosing_method_class_index == 0) {
2819 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2820 }
2821 // Validate the constant pool indices and types
2822 if (!cp->is_within_bounds(enclosing_method_class_index) ||
2823 !is_klass_reference(cp, enclosing_method_class_index)) {
2824 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2825 }
2826 if (enclosing_method_method_index != 0 &&
2827 (!cp->is_within_bounds(enclosing_method_method_index) ||
2828 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2829 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2830 }
2831 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2832 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2833 if (parsed_bootstrap_methods_attribute)
2834 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2835 parsed_bootstrap_methods_attribute = true;
2836 parse_classfile_bootstrap_methods_attribute(loader_data, cp, attribute_length, CHECK);
2837 } else {
2838 // Unknown attribute
2839 cfs->skip_u1(attribute_length, CHECK);
2840 }
2841 } else {
2842 // Unknown attribute
2843 cfs->skip_u1(attribute_length, CHECK);
2844 }
2845 }
2846 AnnotationArray* annotations = assemble_annotations(loader_data,
2847 runtime_visible_annotations,
2848 runtime_visible_annotations_length,
2849 runtime_invisible_annotations,
2850 runtime_invisible_annotations_length,
2851 CHECK);
2852 set_class_annotations(annotations);
2854 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
2855 u2 num_of_classes = parse_classfile_inner_classes_attribute(
2856 loader_data,
2857 inner_classes_attribute_start,
2858 parsed_innerclasses_attribute,
2859 enclosing_method_class_index,
2860 enclosing_method_method_index,
2861 cp, CHECK);
2862 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
2863 guarantee_property(
2864 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2865 "Wrong InnerClasses attribute length in class file %s", CHECK);
2866 }
2867 }
2869 if (_max_bootstrap_specifier_index >= 0) {
2870 guarantee_property(parsed_bootstrap_methods_attribute,
2871 "Missing BootstrapMethods attribute in class file %s", CHECK);
2872 }
2873 }
2875 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
2876 if (_synthetic_flag)
2877 k->set_is_synthetic();
2878 if (_sourcefile != NULL) {
2879 _sourcefile->increment_refcount();
2880 k->set_source_file_name(_sourcefile);
2881 }
2882 if (_generic_signature != NULL) {
2883 _generic_signature->increment_refcount();
2884 k->set_generic_signature(_generic_signature);
2885 }
2886 if (_sde_buffer != NULL) {
2887 k->set_source_debug_extension(_sde_buffer, _sde_length);
2888 }
2889 k->set_inner_classes(_inner_classes);
2890 if (_annotations != NULL) {
2891 k->annotations()->set_class_annotations(_annotations);
2892 }
2893 }
2895 AnnotationArray* ClassFileParser::assemble_annotations(ClassLoaderData* loader_data,
2896 u1* runtime_visible_annotations,
2897 int runtime_visible_annotations_length,
2898 u1* runtime_invisible_annotations,
2899 int runtime_invisible_annotations_length, TRAPS) {
2900 AnnotationArray* annotations = NULL;
2901 if (runtime_visible_annotations != NULL ||
2902 runtime_invisible_annotations != NULL) {
2903 annotations = MetadataFactory::new_array<u1>(loader_data,
2904 runtime_visible_annotations_length +
2905 runtime_invisible_annotations_length,
2906 CHECK_(annotations));
2907 if (runtime_visible_annotations != NULL) {
2908 for (int i = 0; i < runtime_visible_annotations_length; i++) {
2909 annotations->at_put(i, runtime_visible_annotations[i]);
2910 }
2911 }
2912 if (runtime_invisible_annotations != NULL) {
2913 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
2914 int append = runtime_visible_annotations_length+i;
2915 annotations->at_put(append, runtime_invisible_annotations[i]);
2916 }
2917 }
2918 }
2919 return annotations;
2920 }
2923 #ifndef PRODUCT
2924 static void parseAndPrintGenericSignatures(
2925 instanceKlassHandle this_klass, TRAPS) {
2926 assert(ParseAllGenericSignatures == true, "Shouldn't call otherwise");
2927 ResourceMark rm;
2929 if (this_klass->generic_signature() != NULL) {
2930 using namespace generic;
2931 ClassDescriptor* spec = ClassDescriptor::parse_generic_signature(this_klass(), CHECK);
2933 tty->print_cr("Parsing %s", this_klass->generic_signature()->as_C_string());
2934 spec->print_on(tty);
2936 for (int i = 0; i < this_klass->methods()->length(); ++i) {
2937 Method* m = this_klass->methods()->at(i);
2938 MethodDescriptor* method_spec = MethodDescriptor::parse_generic_signature(m, spec);
2939 Symbol* sig = m->generic_signature();
2940 if (sig == NULL) {
2941 sig = m->signature();
2942 }
2943 tty->print_cr("Parsing %s", sig->as_C_string());
2944 method_spec->print_on(tty);
2945 }
2946 }
2947 }
2948 #endif // ndef PRODUCT
2951 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2952 ClassLoaderData* loader_data,
2953 Handle protection_domain,
2954 KlassHandle host_klass,
2955 GrowableArray<Handle>* cp_patches,
2956 TempNewSymbol& parsed_name,
2957 bool verify,
2958 TRAPS) {
2959 // When a retransformable agent is attached, JVMTI caches the
2960 // class bytes that existed before the first retransformation.
2961 // If RedefineClasses() was used before the retransformable
2962 // agent attached, then the cached class bytes may not be the
2963 // original class bytes.
2964 unsigned char *cached_class_file_bytes = NULL;
2965 jint cached_class_file_length;
2966 Handle class_loader(THREAD, loader_data->class_loader());
2967 bool has_default_methods = false;
2968 ResourceMark rm(THREAD);
2970 ClassFileStream* cfs = stream();
2971 // Timing
2972 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2973 JavaThread* jt = (JavaThread*) THREAD;
2975 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2976 ClassLoader::perf_class_parse_selftime(),
2977 NULL,
2978 jt->get_thread_stat()->perf_recursion_counts_addr(),
2979 jt->get_thread_stat()->perf_timers_addr(),
2980 PerfClassTraceTime::PARSE_CLASS);
2982 init_parsed_class_attributes();
2984 if (JvmtiExport::should_post_class_file_load_hook()) {
2985 // Get the cached class file bytes (if any) from the class that
2986 // is being redefined or retransformed. We use jvmti_thread_state()
2987 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
2988 // a JvmtiThreadState any earlier than necessary. This will help
2989 // avoid the bug described by 7126851.
2990 JvmtiThreadState *state = jt->jvmti_thread_state();
2991 if (state != NULL) {
2992 KlassHandle *h_class_being_redefined =
2993 state->get_class_being_redefined();
2994 if (h_class_being_redefined != NULL) {
2995 instanceKlassHandle ikh_class_being_redefined =
2996 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
2997 cached_class_file_bytes =
2998 ikh_class_being_redefined->get_cached_class_file_bytes();
2999 cached_class_file_length =
3000 ikh_class_being_redefined->get_cached_class_file_len();
3001 }
3002 }
3004 unsigned char* ptr = cfs->buffer();
3005 unsigned char* end_ptr = cfs->buffer() + cfs->length();
3007 JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3008 &ptr, &end_ptr,
3009 &cached_class_file_bytes,
3010 &cached_class_file_length);
3012 if (ptr != cfs->buffer()) {
3013 // JVMTI agent has modified class file data.
3014 // Set new class file stream using JVMTI agent modified
3015 // class file data.
3016 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3017 set_stream(cfs);
3018 }
3019 }
3021 _host_klass = host_klass;
3022 _cp_patches = cp_patches;
3024 instanceKlassHandle nullHandle;
3026 // Figure out whether we can skip format checking (matching classic VM behavior)
3027 _need_verify = Verifier::should_verify_for(class_loader(), verify);
3029 // Set the verify flag in stream
3030 cfs->set_verify(_need_verify);
3032 // Save the class file name for easier error message printing.
3033 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3035 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
3036 // Magic value
3037 u4 magic = cfs->get_u4_fast();
3038 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3039 "Incompatible magic value %u in class file %s",
3040 magic, CHECK_(nullHandle));
3042 // Version numbers
3043 u2 minor_version = cfs->get_u2_fast();
3044 u2 major_version = cfs->get_u2_fast();
3046 // Check version numbers - we check this even with verifier off
3047 if (!is_supported_version(major_version, minor_version)) {
3048 if (name == NULL) {
3049 Exceptions::fthrow(
3050 THREAD_AND_LOCATION,
3051 vmSymbols::java_lang_UnsupportedClassVersionError(),
3052 "Unsupported major.minor version %u.%u",
3053 major_version,
3054 minor_version);
3055 } else {
3056 ResourceMark rm(THREAD);
3057 Exceptions::fthrow(
3058 THREAD_AND_LOCATION,
3059 vmSymbols::java_lang_UnsupportedClassVersionError(),
3060 "%s : Unsupported major.minor version %u.%u",
3061 name->as_C_string(),
3062 major_version,
3063 minor_version);
3064 }
3065 return nullHandle;
3066 }
3068 _major_version = major_version;
3069 _minor_version = minor_version;
3072 // Check if verification needs to be relaxed for this class file
3073 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3074 _relax_verify = Verifier::relax_verify_for(class_loader());
3076 // Constant pool
3077 constantPoolHandle cp = parse_constant_pool(loader_data, CHECK_(nullHandle));
3078 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
3080 int cp_size = cp->length();
3082 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3084 // Access flags
3085 AccessFlags access_flags;
3086 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3088 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3089 // Set abstract bit for old class files for backward compatibility
3090 flags |= JVM_ACC_ABSTRACT;
3091 }
3092 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3093 access_flags.set_flags(flags);
3095 // This class and superclass
3096 instanceKlassHandle super_klass;
3097 u2 this_class_index = cfs->get_u2_fast();
3098 check_property(
3099 valid_cp_range(this_class_index, cp_size) &&
3100 cp->tag_at(this_class_index).is_unresolved_klass(),
3101 "Invalid this class index %u in constant pool in class file %s",
3102 this_class_index, CHECK_(nullHandle));
3104 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
3105 assert(class_name != NULL, "class_name can't be null");
3107 // It's important to set parsed_name *before* resolving the super class.
3108 // (it's used for cleanup by the caller if parsing fails)
3109 parsed_name = class_name;
3110 // parsed_name is returned and can be used if there's an error, so add to
3111 // its reference count. Caller will decrement the refcount.
3112 parsed_name->increment_refcount();
3114 // Update _class_name which could be null previously to be class_name
3115 _class_name = class_name;
3117 // Don't need to check whether this class name is legal or not.
3118 // It has been checked when constant pool is parsed.
3119 // However, make sure it is not an array type.
3120 if (_need_verify) {
3121 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3122 "Bad class name in class file %s",
3123 CHECK_(nullHandle));
3124 }
3126 Klass* preserve_this_klass; // for storing result across HandleMark
3128 // release all handles when parsing is done
3129 { HandleMark hm(THREAD);
3131 // Checks if name in class file matches requested name
3132 if (name != NULL && class_name != name) {
3133 ResourceMark rm(THREAD);
3134 Exceptions::fthrow(
3135 THREAD_AND_LOCATION,
3136 vmSymbols::java_lang_NoClassDefFoundError(),
3137 "%s (wrong name: %s)",
3138 name->as_C_string(),
3139 class_name->as_C_string()
3140 );
3141 return nullHandle;
3142 }
3144 if (TraceClassLoadingPreorder) {
3145 tty->print("[Loading %s", name->as_klass_external_name());
3146 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3147 tty->print_cr("]");
3148 }
3150 u2 super_class_index = cfs->get_u2_fast();
3151 if (super_class_index == 0) {
3152 check_property(class_name == vmSymbols::java_lang_Object(),
3153 "Invalid superclass index %u in class file %s",
3154 super_class_index,
3155 CHECK_(nullHandle));
3156 } else {
3157 check_property(valid_cp_range(super_class_index, cp_size) &&
3158 is_klass_reference(cp, super_class_index),
3159 "Invalid superclass index %u in class file %s",
3160 super_class_index,
3161 CHECK_(nullHandle));
3162 // The class name should be legal because it is checked when parsing constant pool.
3163 // However, make sure it is not an array type.
3164 bool is_array = false;
3165 if (cp->tag_at(super_class_index).is_klass()) {
3166 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3167 if (_need_verify)
3168 is_array = super_klass->oop_is_array();
3169 } else if (_need_verify) {
3170 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3171 }
3172 if (_need_verify) {
3173 guarantee_property(!is_array,
3174 "Bad superclass name in class file %s", CHECK_(nullHandle));
3175 }
3176 }
3178 // Interfaces
3179 u2 itfs_len = cfs->get_u2_fast();
3180 Array<Klass*>* local_interfaces;
3181 if (itfs_len == 0) {
3182 local_interfaces = Universe::the_empty_klass_array();
3183 } else {
3184 local_interfaces = parse_interfaces(
3185 cp, itfs_len, loader_data, protection_domain, _class_name,
3186 &has_default_methods, CHECK_(nullHandle));
3187 }
3189 u2 java_fields_count = 0;
3190 // Fields (offsets are filled in later)
3191 FieldAllocationCount fac;
3192 Array<AnnotationArray*>* fields_annotations = NULL;
3193 Array<u2>* fields = parse_fields(loader_data, class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
3194 &java_fields_count,
3195 CHECK_(nullHandle));
3196 // Methods
3197 bool has_final_method = false;
3198 AccessFlags promoted_flags;
3199 promoted_flags.set_flags(0);
3200 // These need to be oop pointers because they are allocated lazily
3201 // inside parse_methods inside a nested HandleMark
3202 Array<AnnotationArray*>* methods_annotations = NULL;
3203 Array<AnnotationArray*>* methods_parameter_annotations = NULL;
3204 Array<AnnotationArray*>* methods_default_annotations = NULL;
3205 Array<Method*>* methods = parse_methods(loader_data,
3206 cp, access_flags.is_interface(),
3207 &promoted_flags,
3208 &has_final_method,
3209 &methods_annotations,
3210 &methods_parameter_annotations,
3211 &methods_default_annotations,
3212 &has_default_methods,
3213 CHECK_(nullHandle));
3215 // Additional attributes
3216 ClassAnnotationCollector parsed_annotations;
3217 parse_classfile_attributes(loader_data, cp, &parsed_annotations, CHECK_(nullHandle));
3219 // Make sure this is the end of class file stream
3220 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3222 // We check super class after class file is parsed and format is checked
3223 if (super_class_index > 0 && super_klass.is_null()) {
3224 Symbol* sk = cp->klass_name_at(super_class_index);
3225 if (access_flags.is_interface()) {
3226 // Before attempting to resolve the superclass, check for class format
3227 // errors not checked yet.
3228 guarantee_property(sk == vmSymbols::java_lang_Object(),
3229 "Interfaces must have java.lang.Object as superclass in class file %s",
3230 CHECK_(nullHandle));
3231 }
3232 Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
3233 class_loader,
3234 protection_domain,
3235 true,
3236 CHECK_(nullHandle));
3238 KlassHandle kh (THREAD, k);
3239 super_klass = instanceKlassHandle(THREAD, kh());
3240 }
3241 if (super_klass.not_null()) {
3243 if (super_klass->has_default_methods()) {
3244 has_default_methods = true;
3245 }
3247 if (super_klass->is_interface()) {
3248 ResourceMark rm(THREAD);
3249 Exceptions::fthrow(
3250 THREAD_AND_LOCATION,
3251 vmSymbols::java_lang_IncompatibleClassChangeError(),
3252 "class %s has interface %s as super class",
3253 class_name->as_klass_external_name(),
3254 super_klass->external_name()
3255 );
3256 return nullHandle;
3257 }
3258 // Make sure super class is not final
3259 if (super_klass->is_final()) {
3260 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3261 }
3262 }
3264 // Compute the transitive list of all unique interfaces implemented by this class
3265 Array<Klass*>* transitive_interfaces = compute_transitive_interfaces(loader_data, super_klass, local_interfaces, CHECK_(nullHandle));
3267 // sort methods
3268 Array<int>* method_ordering = sort_methods(loader_data,
3269 methods,
3270 methods_annotations,
3271 methods_parameter_annotations,
3272 methods_default_annotations,
3273 CHECK_(nullHandle));
3275 // promote flags from parse_methods() to the klass' flags
3276 access_flags.add_promoted_flags(promoted_flags.as_int());
3278 // Size of Java vtable (in words)
3279 int vtable_size = 0;
3280 int itable_size = 0;
3281 int num_miranda_methods = 0;
3283 GrowableArray<Method*> all_mirandas(20);
3285 klassVtable::compute_vtable_size_and_num_mirandas(
3286 &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
3287 access_flags, class_loader, class_name, local_interfaces,
3288 CHECK_(nullHandle));
3290 // Size of Java itable (in words)
3291 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3293 // Field size and offset computation
3294 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3295 #ifndef PRODUCT
3296 int orig_nonstatic_field_size = 0;
3297 #endif
3298 int static_field_size = 0;
3299 int next_static_oop_offset;
3300 int next_static_double_offset;
3301 int next_static_word_offset;
3302 int next_static_short_offset;
3303 int next_static_byte_offset;
3304 int next_static_type_offset;
3305 int next_nonstatic_oop_offset;
3306 int next_nonstatic_double_offset;
3307 int next_nonstatic_word_offset;
3308 int next_nonstatic_short_offset;
3309 int next_nonstatic_byte_offset;
3310 int next_nonstatic_type_offset;
3311 int first_nonstatic_oop_offset;
3312 int first_nonstatic_field_offset;
3313 int next_nonstatic_field_offset;
3315 // Calculate the starting byte offsets
3316 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3317 next_static_double_offset = next_static_oop_offset +
3318 (fac.count[STATIC_OOP] * heapOopSize);
3319 if ( fac.count[STATIC_DOUBLE] &&
3320 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3321 Universe::field_type_should_be_aligned(T_LONG)) ) {
3322 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3323 }
3325 next_static_word_offset = next_static_double_offset +
3326 (fac.count[STATIC_DOUBLE] * BytesPerLong);
3327 next_static_short_offset = next_static_word_offset +
3328 (fac.count[STATIC_WORD] * BytesPerInt);
3329 next_static_byte_offset = next_static_short_offset +
3330 (fac.count[STATIC_SHORT] * BytesPerShort);
3331 next_static_type_offset = align_size_up((next_static_byte_offset +
3332 fac.count[STATIC_BYTE] ), wordSize );
3333 static_field_size = (next_static_type_offset -
3334 next_static_oop_offset) / wordSize;
3336 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3337 nonstatic_field_size * heapOopSize;
3338 next_nonstatic_field_offset = first_nonstatic_field_offset;
3340 unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3341 unsigned int nonstatic_word_count = fac.count[NONSTATIC_WORD];
3342 unsigned int nonstatic_short_count = fac.count[NONSTATIC_SHORT];
3343 unsigned int nonstatic_byte_count = fac.count[NONSTATIC_BYTE];
3344 unsigned int nonstatic_oop_count = fac.count[NONSTATIC_OOP];
3346 bool super_has_nonstatic_fields =
3347 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3348 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3349 ((nonstatic_double_count + nonstatic_word_count +
3350 nonstatic_short_count + nonstatic_byte_count +
3351 nonstatic_oop_count) != 0);
3354 // Prepare list of oops for oop map generation.
3355 int* nonstatic_oop_offsets;
3356 unsigned int* nonstatic_oop_counts;
3357 unsigned int nonstatic_oop_map_count = 0;
3359 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3360 THREAD, int, nonstatic_oop_count + 1);
3361 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3362 THREAD, unsigned int, nonstatic_oop_count + 1);
3364 first_nonstatic_oop_offset = 0; // will be set for first oop field
3366 #ifndef PRODUCT
3367 if( PrintCompactFieldsSavings ) {
3368 next_nonstatic_double_offset = next_nonstatic_field_offset +
3369 (nonstatic_oop_count * heapOopSize);
3370 if ( nonstatic_double_count > 0 ) {
3371 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3372 }
3373 next_nonstatic_word_offset = next_nonstatic_double_offset +
3374 (nonstatic_double_count * BytesPerLong);
3375 next_nonstatic_short_offset = next_nonstatic_word_offset +
3376 (nonstatic_word_count * BytesPerInt);
3377 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3378 (nonstatic_short_count * BytesPerShort);
3379 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3380 nonstatic_byte_count ), heapOopSize );
3381 orig_nonstatic_field_size = nonstatic_field_size +
3382 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3383 }
3384 #endif
3385 bool compact_fields = CompactFields;
3386 int allocation_style = FieldsAllocationStyle;
3387 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3388 assert(false, "0 <= FieldsAllocationStyle <= 2");
3389 allocation_style = 1; // Optimistic
3390 }
3392 // The next classes have predefined hard-coded fields offsets
3393 // (see in JavaClasses::compute_hard_coded_offsets()).
3394 // Use default fields allocation order for them.
3395 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3396 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3397 class_name == vmSymbols::java_lang_Class() ||
3398 class_name == vmSymbols::java_lang_ClassLoader() ||
3399 class_name == vmSymbols::java_lang_ref_Reference() ||
3400 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3401 class_name == vmSymbols::java_lang_StackTraceElement() ||
3402 class_name == vmSymbols::java_lang_String() ||
3403 class_name == vmSymbols::java_lang_Throwable() ||
3404 class_name == vmSymbols::java_lang_Boolean() ||
3405 class_name == vmSymbols::java_lang_Character() ||
3406 class_name == vmSymbols::java_lang_Float() ||
3407 class_name == vmSymbols::java_lang_Double() ||
3408 class_name == vmSymbols::java_lang_Byte() ||
3409 class_name == vmSymbols::java_lang_Short() ||
3410 class_name == vmSymbols::java_lang_Integer() ||
3411 class_name == vmSymbols::java_lang_Long())) {
3412 allocation_style = 0; // Allocate oops first
3413 compact_fields = false; // Don't compact fields
3414 }
3416 if( allocation_style == 0 ) {
3417 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3418 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3419 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3420 (nonstatic_oop_count * heapOopSize);
3421 } else if( allocation_style == 1 ) {
3422 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3423 next_nonstatic_double_offset = next_nonstatic_field_offset;
3424 } else if( allocation_style == 2 ) {
3425 // Fields allocation: oops fields in super and sub classes are together.
3426 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3427 super_klass->nonstatic_oop_map_size() > 0 ) {
3428 int map_count = super_klass->nonstatic_oop_map_count();
3429 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3430 OopMapBlock* last_map = first_map + map_count - 1;
3431 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3432 if (next_offset == next_nonstatic_field_offset) {
3433 allocation_style = 0; // allocate oops first
3434 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3435 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3436 (nonstatic_oop_count * heapOopSize);
3437 }
3438 }
3439 if( allocation_style == 2 ) {
3440 allocation_style = 1; // allocate oops last
3441 next_nonstatic_double_offset = next_nonstatic_field_offset;
3442 }
3443 } else {
3444 ShouldNotReachHere();
3445 }
3447 int nonstatic_oop_space_count = 0;
3448 int nonstatic_word_space_count = 0;
3449 int nonstatic_short_space_count = 0;
3450 int nonstatic_byte_space_count = 0;
3451 int nonstatic_oop_space_offset;
3452 int nonstatic_word_space_offset;
3453 int nonstatic_short_space_offset;
3454 int nonstatic_byte_space_offset;
3456 if( nonstatic_double_count > 0 ) {
3457 int offset = next_nonstatic_double_offset;
3458 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3459 if( compact_fields && offset != next_nonstatic_double_offset ) {
3460 // Allocate available fields into the gap before double field.
3461 int length = next_nonstatic_double_offset - offset;
3462 assert(length == BytesPerInt, "");
3463 nonstatic_word_space_offset = offset;
3464 if( nonstatic_word_count > 0 ) {
3465 nonstatic_word_count -= 1;
3466 nonstatic_word_space_count = 1; // Only one will fit
3467 length -= BytesPerInt;
3468 offset += BytesPerInt;
3469 }
3470 nonstatic_short_space_offset = offset;
3471 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3472 nonstatic_short_count -= 1;
3473 nonstatic_short_space_count += 1;
3474 length -= BytesPerShort;
3475 offset += BytesPerShort;
3476 }
3477 nonstatic_byte_space_offset = offset;
3478 while( length > 0 && nonstatic_byte_count > 0 ) {
3479 nonstatic_byte_count -= 1;
3480 nonstatic_byte_space_count += 1;
3481 length -= 1;
3482 }
3483 // Allocate oop field in the gap if there are no other fields for that.
3484 nonstatic_oop_space_offset = offset;
3485 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3486 allocation_style != 0 ) { // when oop fields not first
3487 nonstatic_oop_count -= 1;
3488 nonstatic_oop_space_count = 1; // Only one will fit
3489 length -= heapOopSize;
3490 offset += heapOopSize;
3491 }
3492 }
3493 }
3495 next_nonstatic_word_offset = next_nonstatic_double_offset +
3496 (nonstatic_double_count * BytesPerLong);
3497 next_nonstatic_short_offset = next_nonstatic_word_offset +
3498 (nonstatic_word_count * BytesPerInt);
3499 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3500 (nonstatic_short_count * BytesPerShort);
3502 int notaligned_offset;
3503 if( allocation_style == 0 ) {
3504 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3505 } else { // allocation_style == 1
3506 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3507 if( nonstatic_oop_count > 0 ) {
3508 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3509 }
3510 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3511 }
3512 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3513 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3514 - first_nonstatic_field_offset)/heapOopSize);
3516 // Iterate over fields again and compute correct offsets.
3517 // The field allocation type was temporarily stored in the offset slot.
3518 // oop fields are located before non-oop fields (static and non-static).
3519 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3520 int real_offset;
3521 FieldAllocationType atype = (FieldAllocationType) fs.offset();
3522 switch (atype) {
3523 case STATIC_OOP:
3524 real_offset = next_static_oop_offset;
3525 next_static_oop_offset += heapOopSize;
3526 break;
3527 case STATIC_BYTE:
3528 real_offset = next_static_byte_offset;
3529 next_static_byte_offset += 1;
3530 break;
3531 case STATIC_SHORT:
3532 real_offset = next_static_short_offset;
3533 next_static_short_offset += BytesPerShort;
3534 break;
3535 case STATIC_WORD:
3536 real_offset = next_static_word_offset;
3537 next_static_word_offset += BytesPerInt;
3538 break;
3539 case STATIC_DOUBLE:
3540 real_offset = next_static_double_offset;
3541 next_static_double_offset += BytesPerLong;
3542 break;
3543 case NONSTATIC_OOP:
3544 if( nonstatic_oop_space_count > 0 ) {
3545 real_offset = nonstatic_oop_space_offset;
3546 nonstatic_oop_space_offset += heapOopSize;
3547 nonstatic_oop_space_count -= 1;
3548 } else {
3549 real_offset = next_nonstatic_oop_offset;
3550 next_nonstatic_oop_offset += heapOopSize;
3551 }
3552 // Update oop maps
3553 if( nonstatic_oop_map_count > 0 &&
3554 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3555 real_offset -
3556 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3557 heapOopSize ) {
3558 // Extend current oop map
3559 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3560 } else {
3561 // Create new oop map
3562 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3563 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3564 nonstatic_oop_map_count += 1;
3565 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3566 first_nonstatic_oop_offset = real_offset;
3567 }
3568 }
3569 break;
3570 case NONSTATIC_BYTE:
3571 if( nonstatic_byte_space_count > 0 ) {
3572 real_offset = nonstatic_byte_space_offset;
3573 nonstatic_byte_space_offset += 1;
3574 nonstatic_byte_space_count -= 1;
3575 } else {
3576 real_offset = next_nonstatic_byte_offset;
3577 next_nonstatic_byte_offset += 1;
3578 }
3579 break;
3580 case NONSTATIC_SHORT:
3581 if( nonstatic_short_space_count > 0 ) {
3582 real_offset = nonstatic_short_space_offset;
3583 nonstatic_short_space_offset += BytesPerShort;
3584 nonstatic_short_space_count -= 1;
3585 } else {
3586 real_offset = next_nonstatic_short_offset;
3587 next_nonstatic_short_offset += BytesPerShort;
3588 }
3589 break;
3590 case NONSTATIC_WORD:
3591 if( nonstatic_word_space_count > 0 ) {
3592 real_offset = nonstatic_word_space_offset;
3593 nonstatic_word_space_offset += BytesPerInt;
3594 nonstatic_word_space_count -= 1;
3595 } else {
3596 real_offset = next_nonstatic_word_offset;
3597 next_nonstatic_word_offset += BytesPerInt;
3598 }
3599 break;
3600 case NONSTATIC_DOUBLE:
3601 real_offset = next_nonstatic_double_offset;
3602 next_nonstatic_double_offset += BytesPerLong;
3603 break;
3604 default:
3605 ShouldNotReachHere();
3606 }
3607 fs.set_offset(real_offset);
3608 }
3610 // Size of instances
3611 int instance_size;
3613 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3614 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3616 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3618 // Number of non-static oop map blocks allocated at end of klass.
3619 const unsigned int total_oop_map_count =
3620 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3621 first_nonstatic_oop_offset);
3623 // Compute reference type
3624 ReferenceType rt;
3625 if (super_klass() == NULL) {
3626 rt = REF_NONE;
3627 } else {
3628 rt = super_klass->reference_type();
3629 }
3631 // We can now create the basic Klass* for this klass
3632 int total_oop_map_size2 =
3633 InstanceKlass::nonstatic_oop_map_size(total_oop_map_count);
3635 Klass* ik = InstanceKlass::allocate_instance_klass(loader_data,
3636 vtable_size,
3637 itable_size,
3638 static_field_size,
3639 total_oop_map_size2,
3640 rt,
3641 access_flags,
3642 name,
3643 super_klass(),
3644 host_klass,
3645 CHECK_(nullHandle));
3647 // Add all classes to our internal class loader list here,
3648 // including classes in the bootstrap (NULL) class loader.
3649 loader_data->add_class(ik);
3651 instanceKlassHandle this_klass (THREAD, ik);
3653 assert(this_klass->static_field_size() == static_field_size, "sanity");
3654 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3655 "sanity");
3657 // Fill in information already parsed
3658 this_klass->set_should_verify_class(verify);
3659 jint lh = Klass::instance_layout_helper(instance_size, false);
3660 this_klass->set_layout_helper(lh);
3661 assert(this_klass->oop_is_instance(), "layout is correct");
3662 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3663 // Not yet: supers are done below to support the new subtype-checking fields
3664 //this_klass->set_super(super_klass());
3665 this_klass->set_class_loader_data(loader_data);
3666 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3667 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3668 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3669 cp->set_pool_holder(this_klass());
3670 error_handler.set_in_error(false); // turn off error handler for cp
3671 this_klass->set_constants(cp());
3672 this_klass->set_local_interfaces(local_interfaces);
3673 this_klass->set_fields(fields, java_fields_count);
3674 this_klass->set_methods(methods);
3675 if (has_final_method) {
3676 this_klass->set_has_final_method();
3677 }
3678 this_klass->set_method_ordering(method_ordering);
3679 // The InstanceKlass::_methods_jmethod_ids cache and the
3680 // InstanceKlass::_methods_cached_itable_indices cache are
3681 // both managed on the assumption that the initial cache
3682 // size is equal to the number of methods in the class. If
3683 // that changes, then InstanceKlass::idnum_can_increment()
3684 // has to be changed accordingly.
3685 this_klass->set_initial_method_idnum(methods->length());
3686 this_klass->set_name(cp->klass_name_at(this_class_index));
3687 if (is_anonymous()) // I am well known to myself
3688 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3690 if (fields_annotations != NULL ||
3691 methods_annotations != NULL ||
3692 methods_parameter_annotations != NULL ||
3693 methods_default_annotations != NULL) {
3694 // Allocate an annotation type if needed.
3695 Annotations* anno = Annotations::allocate(loader_data,
3696 fields_annotations, methods_annotations,
3697 methods_parameter_annotations,
3698 methods_default_annotations, CHECK_(nullHandle));
3699 this_klass->set_annotations(anno);
3700 } else {
3701 this_klass->set_annotations(NULL);
3702 }
3705 this_klass->set_minor_version(minor_version);
3706 this_klass->set_major_version(major_version);
3707 this_klass->set_has_default_methods(has_default_methods);
3709 // Set up Method*::intrinsic_id as soon as we know the names of methods.
3710 // (We used to do this lazily, but now we query it in Rewriter,
3711 // which is eagerly done for every method, so we might as well do it now,
3712 // when everything is fresh in memory.)
3713 if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
3714 for (int j = 0; j < methods->length(); j++) {
3715 methods->at(j)->init_intrinsic_id();
3716 }
3717 }
3719 if (cached_class_file_bytes != NULL) {
3720 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
3721 this_klass->set_cached_class_file(cached_class_file_bytes,
3722 cached_class_file_length);
3723 }
3725 // Fill in field values obtained by parse_classfile_attributes
3726 if (parsed_annotations.has_any_annotations())
3727 parsed_annotations.apply_to(this_klass);
3728 // Create annotations
3729 if (_annotations != NULL && this_klass->annotations() == NULL) {
3730 Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
3731 this_klass->set_annotations(anno);
3732 }
3733 apply_parsed_class_attributes(this_klass);
3735 // Miranda methods
3736 if ((num_miranda_methods > 0) ||
3737 // if this class introduced new miranda methods or
3738 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3739 // super class exists and this class inherited miranda methods
3740 ) {
3741 this_klass->set_has_miranda_methods(); // then set a flag
3742 }
3744 this_klass->set_transitive_interfaces(transitive_interfaces);
3746 // Fill in information needed to compute superclasses.
3747 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3749 // Initialize itable offset tables
3750 klassItable::setup_itable_offset_table(this_klass);
3752 // Compute transitive closure of interfaces this class implements
3753 // Do final class setup
3754 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3756 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
3757 set_precomputed_flags(this_klass);
3759 // reinitialize modifiers, using the InnerClasses attribute
3760 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3761 this_klass->set_modifier_flags(computed_modifiers);
3763 // check if this class can access its super class
3764 check_super_class_access(this_klass, CHECK_(nullHandle));
3766 // check if this class can access its superinterfaces
3767 check_super_interface_access(this_klass, CHECK_(nullHandle));
3769 // check if this class overrides any final method
3770 check_final_method_override(this_klass, CHECK_(nullHandle));
3772 // check that if this class is an interface then it doesn't have static methods
3773 if (this_klass->is_interface()) {
3774 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3775 }
3778 #ifdef ASSERT
3779 if (ParseAllGenericSignatures) {
3780 parseAndPrintGenericSignatures(this_klass, CHECK_(nullHandle));
3781 }
3782 #endif
3784 // Generate any default methods - default methods are interface methods
3785 // that have a default implementation. This is new with Lambda project.
3786 if (has_default_methods && !access_flags.is_interface() &&
3787 local_interfaces->length() > 0) {
3788 DefaultMethods::generate_default_methods(
3789 this_klass(), &all_mirandas, CHECK_(nullHandle));
3790 }
3792 // Allocate mirror and initialize static fields
3793 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3795 // Allocate a simple java object for locking during class initialization.
3796 // This needs to be a java object because it can be held across a java call.
3797 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL);
3798 this_klass->set_init_lock(r);
3800 // TODO: Move these oops to the mirror
3801 this_klass->set_protection_domain(protection_domain());
3803 // Update the loader_data graph.
3804 record_defined_class_dependencies(this_klass, CHECK_NULL);
3806 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
3807 false /* not shared class */);
3809 if (TraceClassLoading) {
3810 ResourceMark rm;
3811 // print in a single call to reduce interleaving of output
3812 if (cfs->source() != NULL) {
3813 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3814 cfs->source());
3815 } else if (class_loader.is_null()) {
3816 if (THREAD->is_Java_thread()) {
3817 Klass* caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3818 tty->print("[Loaded %s by instance of %s]\n",
3819 this_klass->external_name(),
3820 InstanceKlass::cast(caller)->external_name());
3821 } else {
3822 tty->print("[Loaded %s]\n", this_klass->external_name());
3823 }
3824 } else {
3825 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3826 InstanceKlass::cast(class_loader->klass())->external_name());
3827 }
3828 }
3830 if (TraceClassResolution) {
3831 ResourceMark rm;
3832 // print out the superclass.
3833 const char * from = this_klass()->external_name();
3834 if (this_klass->java_super() != NULL) {
3835 tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
3836 }
3837 // print out each of the interface classes referred to by this class.
3838 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
3839 if (local_interfaces != NULL) {
3840 int length = local_interfaces->length();
3841 for (int i = 0; i < length; i++) {
3842 Klass* k = local_interfaces->at(i);
3843 InstanceKlass* to_class = InstanceKlass::cast(k);
3844 const char * to = to_class->external_name();
3845 tty->print("RESOLVE %s %s (interface)\n", from, to);
3846 }
3847 }
3848 }
3850 #ifndef PRODUCT
3851 if( PrintCompactFieldsSavings ) {
3852 ResourceMark rm;
3853 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3854 tty->print("[Saved %d of %d bytes in %s]\n",
3855 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3856 orig_nonstatic_field_size*heapOopSize,
3857 this_klass->external_name());
3858 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3859 tty->print("[Wasted %d over %d bytes in %s]\n",
3860 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3861 orig_nonstatic_field_size*heapOopSize,
3862 this_klass->external_name());
3863 }
3864 }
3865 #endif
3867 // preserve result across HandleMark
3868 preserve_this_klass = this_klass();
3869 }
3871 // Create new handle outside HandleMark (might be needed for
3872 // Extended Class Redefinition)
3873 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3874 debug_only(this_klass->verify();)
3876 return this_klass;
3877 }
3879 unsigned int
3880 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3881 unsigned int nonstatic_oop_map_count,
3882 int first_nonstatic_oop_offset) {
3883 unsigned int map_count =
3884 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3885 if (nonstatic_oop_map_count > 0) {
3886 // We have oops to add to map
3887 if (map_count == 0) {
3888 map_count = nonstatic_oop_map_count;
3889 } else {
3890 // Check whether we should add a new map block or whether the last one can
3891 // be extended
3892 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3893 OopMapBlock* const last_map = first_map + map_count - 1;
3895 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3896 if (next_offset == first_nonstatic_oop_offset) {
3897 // There is no gap bettwen superklass's last oop field and first
3898 // local oop field, merge maps.
3899 nonstatic_oop_map_count -= 1;
3900 } else {
3901 // Superklass didn't end with a oop field, add extra maps
3902 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3903 }
3904 map_count += nonstatic_oop_map_count;
3905 }
3906 }
3907 return map_count;
3908 }
3911 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3912 unsigned int nonstatic_oop_map_count,
3913 int* nonstatic_oop_offsets,
3914 unsigned int* nonstatic_oop_counts) {
3915 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3916 const InstanceKlass* const super = k->superklass();
3917 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3918 if (super_count > 0) {
3919 // Copy maps from superklass
3920 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3921 for (unsigned int i = 0; i < super_count; ++i) {
3922 *this_oop_map++ = *super_oop_map++;
3923 }
3924 }
3926 if (nonstatic_oop_map_count > 0) {
3927 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3928 // The counts differ because there is no gap between superklass's last oop
3929 // field and the first local oop field. Extend the last oop map copied
3930 // from the superklass instead of creating new one.
3931 nonstatic_oop_map_count--;
3932 nonstatic_oop_offsets++;
3933 this_oop_map--;
3934 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3935 this_oop_map++;
3936 }
3938 // Add new map blocks, fill them
3939 while (nonstatic_oop_map_count-- > 0) {
3940 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3941 this_oop_map->set_count(*nonstatic_oop_counts++);
3942 this_oop_map++;
3943 }
3944 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3945 this_oop_map, "sanity");
3946 }
3947 }
3950 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3951 Klass* super = k->super();
3953 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3954 // in which case we don't have to register objects as finalizable
3955 if (!_has_empty_finalizer) {
3956 if (_has_finalizer ||
3957 (super != NULL && super->has_finalizer())) {
3958 k->set_has_finalizer();
3959 }
3960 }
3962 #ifdef ASSERT
3963 bool f = false;
3964 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
3965 vmSymbols::void_method_signature());
3966 if (m != NULL && !m->is_empty_method()) {
3967 f = true;
3968 }
3969 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3970 #endif
3972 // Check if this klass supports the java.lang.Cloneable interface
3973 if (SystemDictionary::Cloneable_klass_loaded()) {
3974 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3975 k->set_is_cloneable();
3976 }
3977 }
3979 // Check if this klass has a vanilla default constructor
3980 if (super == NULL) {
3981 // java.lang.Object has empty default constructor
3982 k->set_has_vanilla_constructor();
3983 } else {
3984 if (super->has_vanilla_constructor() &&
3985 _has_vanilla_constructor) {
3986 k->set_has_vanilla_constructor();
3987 }
3988 #ifdef ASSERT
3989 bool v = false;
3990 if (super->has_vanilla_constructor()) {
3991 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
3992 ), vmSymbols::void_method_signature());
3993 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3994 v = true;
3995 }
3996 }
3997 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3998 #endif
3999 }
4001 // If it cannot be fast-path allocated, set a bit in the layout helper.
4002 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4003 assert(k->size_helper() > 0, "layout_helper is initialized");
4004 if ((!RegisterFinalizersAtInit && k->has_finalizer())
4005 || k->is_abstract() || k->is_interface()
4006 || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4007 || k->size_helper() >= FastAllocateSizeLimit) {
4008 // Forbid fast-path allocation.
4009 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4010 k->set_layout_helper(lh);
4011 }
4012 }
4014 // Attach super classes and interface classes to class loader data
4015 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4016 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4017 if (defining_loader_data->is_the_null_class_loader_data()) {
4018 // Dependencies to null class loader data are implicit.
4019 return;
4020 } else {
4021 // add super class dependency
4022 Klass* super = defined_klass->super();
4023 if (super != NULL) {
4024 defining_loader_data->record_dependency(super, CHECK);
4025 }
4027 // add super interface dependencies
4028 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4029 if (local_interfaces != NULL) {
4030 int length = local_interfaces->length();
4031 for (int i = 0; i < length; i++) {
4032 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4033 }
4034 }
4035 }
4036 }
4038 // utility method for appending and array with check for duplicates
4040 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4041 // iterate over new interfaces
4042 for (int i = 0; i < ifs->length(); i++) {
4043 Klass* e = ifs->at(i);
4044 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4045 // add new interface
4046 result->append_if_missing(e);
4047 }
4048 }
4051 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(ClassLoaderData* loader_data, instanceKlassHandle super, Array<Klass*>* local_ifs, TRAPS) {
4052 // Compute maximum size for transitive interfaces
4053 int max_transitive_size = 0;
4054 int super_size = 0;
4055 // Add superclass transitive interfaces size
4056 if (super.not_null()) {
4057 super_size = super->transitive_interfaces()->length();
4058 max_transitive_size += super_size;
4059 }
4060 // Add local interfaces' super interfaces
4061 int local_size = local_ifs->length();
4062 for (int i = 0; i < local_size; i++) {
4063 Klass* l = local_ifs->at(i);
4064 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4065 }
4066 // Finally add local interfaces
4067 max_transitive_size += local_size;
4068 // Construct array
4069 if (max_transitive_size == 0) {
4070 // no interfaces, use canonicalized array
4071 return Universe::the_empty_klass_array();
4072 } else if (max_transitive_size == super_size) {
4073 // no new local interfaces added, share superklass' transitive interface array
4074 return super->transitive_interfaces();
4075 } else if (max_transitive_size == local_size) {
4076 // only local interfaces added, share local interface array
4077 return local_ifs;
4078 } else {
4079 ResourceMark rm;
4080 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4082 // Copy down from superclass
4083 if (super.not_null()) {
4084 append_interfaces(result, super->transitive_interfaces());
4085 }
4087 // Copy down from local interfaces' superinterfaces
4088 for (int i = 0; i < local_ifs->length(); i++) {
4089 Klass* l = local_ifs->at(i);
4090 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4091 }
4092 // Finally add local interfaces
4093 append_interfaces(result, local_ifs);
4095 // length will be less than the max_transitive_size if duplicates were removed
4096 int length = result->length();
4097 assert(length <= max_transitive_size, "just checking");
4098 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4099 for (int i = 0; i < length; i++) {
4100 Klass* e = result->at(i);
4101 assert(e != NULL, "just checking");
4102 new_result->at_put(i, e);
4103 }
4104 return new_result;
4105 }
4106 }
4109 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4110 Klass* super = this_klass->super();
4111 if ((super != NULL) &&
4112 (!Reflection::verify_class_access(this_klass(), super, false))) {
4113 ResourceMark rm(THREAD);
4114 Exceptions::fthrow(
4115 THREAD_AND_LOCATION,
4116 vmSymbols::java_lang_IllegalAccessError(),
4117 "class %s cannot access its superclass %s",
4118 this_klass->external_name(),
4119 InstanceKlass::cast(super)->external_name()
4120 );
4121 return;
4122 }
4123 }
4126 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4127 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4128 int lng = local_interfaces->length();
4129 for (int i = lng - 1; i >= 0; i--) {
4130 Klass* k = local_interfaces->at(i);
4131 assert (k != NULL && k->is_interface(), "invalid interface");
4132 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4133 ResourceMark rm(THREAD);
4134 Exceptions::fthrow(
4135 THREAD_AND_LOCATION,
4136 vmSymbols::java_lang_IllegalAccessError(),
4137 "class %s cannot access its superinterface %s",
4138 this_klass->external_name(),
4139 InstanceKlass::cast(k)->external_name()
4140 );
4141 return;
4142 }
4143 }
4144 }
4147 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4148 Array<Method*>* methods = this_klass->methods();
4149 int num_methods = methods->length();
4151 // go thru each method and check if it overrides a final method
4152 for (int index = 0; index < num_methods; index++) {
4153 Method* m = methods->at(index);
4155 // skip private, static and <init> methods
4156 if ((!m->is_private()) &&
4157 (!m->is_static()) &&
4158 (m->name() != vmSymbols::object_initializer_name())) {
4160 Symbol* name = m->name();
4161 Symbol* signature = m->signature();
4162 Klass* k = this_klass->super();
4163 Method* super_m = NULL;
4164 while (k != NULL) {
4165 // skip supers that don't have final methods.
4166 if (k->has_final_method()) {
4167 // lookup a matching method in the super class hierarchy
4168 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4169 if (super_m == NULL) {
4170 break; // didn't find any match; get out
4171 }
4173 if (super_m->is_final() &&
4174 // matching method in super is final
4175 (Reflection::verify_field_access(this_klass(),
4176 super_m->method_holder(),
4177 super_m->method_holder(),
4178 super_m->access_flags(), false))
4179 // this class can access super final method and therefore override
4180 ) {
4181 ResourceMark rm(THREAD);
4182 Exceptions::fthrow(
4183 THREAD_AND_LOCATION,
4184 vmSymbols::java_lang_VerifyError(),
4185 "class %s overrides final method %s.%s",
4186 this_klass->external_name(),
4187 name->as_C_string(),
4188 signature->as_C_string()
4189 );
4190 return;
4191 }
4193 // continue to look from super_m's holder's super.
4194 k = super_m->method_holder()->super();
4195 continue;
4196 }
4198 k = k->super();
4199 }
4200 }
4201 }
4202 }
4205 // assumes that this_klass is an interface
4206 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4207 assert(this_klass->is_interface(), "not an interface");
4208 Array<Method*>* methods = this_klass->methods();
4209 int num_methods = methods->length();
4211 for (int index = 0; index < num_methods; index++) {
4212 Method* m = methods->at(index);
4213 // if m is static and not the init method, throw a verify error
4214 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4215 ResourceMark rm(THREAD);
4216 Exceptions::fthrow(
4217 THREAD_AND_LOCATION,
4218 vmSymbols::java_lang_VerifyError(),
4219 "Illegal static method %s in interface %s",
4220 m->name()->as_C_string(),
4221 this_klass->external_name()
4222 );
4223 return;
4224 }
4225 }
4226 }
4228 // utility methods for format checking
4230 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4231 if (!_need_verify) { return; }
4233 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4234 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4235 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4236 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4237 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4238 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4239 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4241 if ((is_abstract && is_final) ||
4242 (is_interface && !is_abstract) ||
4243 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4244 (!is_interface && major_gte_15 && is_annotation)) {
4245 ResourceMark rm(THREAD);
4246 Exceptions::fthrow(
4247 THREAD_AND_LOCATION,
4248 vmSymbols::java_lang_ClassFormatError(),
4249 "Illegal class modifiers in class %s: 0x%X",
4250 _class_name->as_C_string(), flags
4251 );
4252 return;
4253 }
4254 }
4256 bool ClassFileParser::has_illegal_visibility(jint flags) {
4257 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4258 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4259 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4261 return ((is_public && is_protected) ||
4262 (is_public && is_private) ||
4263 (is_protected && is_private));
4264 }
4266 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4267 u2 max_version =
4268 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4269 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4270 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4271 (major <= max_version) &&
4272 ((major != max_version) ||
4273 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4274 }
4276 void ClassFileParser::verify_legal_field_modifiers(
4277 jint flags, bool is_interface, TRAPS) {
4278 if (!_need_verify) { return; }
4280 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4281 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4282 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4283 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4284 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4285 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4286 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4287 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4288 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4290 bool is_illegal = false;
4292 if (is_interface) {
4293 if (!is_public || !is_static || !is_final || is_private ||
4294 is_protected || is_volatile || is_transient ||
4295 (major_gte_15 && is_enum)) {
4296 is_illegal = true;
4297 }
4298 } else { // not interface
4299 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4300 is_illegal = true;
4301 }
4302 }
4304 if (is_illegal) {
4305 ResourceMark rm(THREAD);
4306 Exceptions::fthrow(
4307 THREAD_AND_LOCATION,
4308 vmSymbols::java_lang_ClassFormatError(),
4309 "Illegal field modifiers in class %s: 0x%X",
4310 _class_name->as_C_string(), flags);
4311 return;
4312 }
4313 }
4315 void ClassFileParser::verify_legal_method_modifiers(
4316 jint flags, bool is_interface, Symbol* name, TRAPS) {
4317 if (!_need_verify) { return; }
4319 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4320 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4321 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4322 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4323 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4324 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4325 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4326 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4327 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4328 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4329 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4330 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4332 bool is_illegal = false;
4334 if (is_interface) {
4335 if (!is_public || is_static || is_final || is_native ||
4336 ((is_synchronized || is_strict) && major_gte_15 &&
4337 (!major_gte_8 || is_abstract)) ||
4338 (!major_gte_8 && !is_abstract)) {
4339 is_illegal = true;
4340 }
4341 } else { // not interface
4342 if (is_initializer) {
4343 if (is_static || is_final || is_synchronized || is_native ||
4344 is_abstract || (major_gte_15 && is_bridge)) {
4345 is_illegal = true;
4346 }
4347 } else { // not initializer
4348 if (is_abstract) {
4349 if ((is_final || is_native || is_private || is_static ||
4350 (major_gte_15 && (is_synchronized || is_strict)))) {
4351 is_illegal = true;
4352 }
4353 }
4354 if (has_illegal_visibility(flags)) {
4355 is_illegal = true;
4356 }
4357 }
4358 }
4360 if (is_illegal) {
4361 ResourceMark rm(THREAD);
4362 Exceptions::fthrow(
4363 THREAD_AND_LOCATION,
4364 vmSymbols::java_lang_ClassFormatError(),
4365 "Method %s in class %s has illegal modifiers: 0x%X",
4366 name->as_C_string(), _class_name->as_C_string(), flags);
4367 return;
4368 }
4369 }
4371 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4372 assert(_need_verify, "only called when _need_verify is true");
4373 int i = 0;
4374 int count = length >> 2;
4375 for (int k=0; k<count; k++) {
4376 unsigned char b0 = buffer[i];
4377 unsigned char b1 = buffer[i+1];
4378 unsigned char b2 = buffer[i+2];
4379 unsigned char b3 = buffer[i+3];
4380 // For an unsigned char v,
4381 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4382 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4383 unsigned char res = b0 | b0 - 1 |
4384 b1 | b1 - 1 |
4385 b2 | b2 - 1 |
4386 b3 | b3 - 1;
4387 if (res >= 128) break;
4388 i += 4;
4389 }
4390 for(; i < length; i++) {
4391 unsigned short c;
4392 // no embedded zeros
4393 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4394 if(buffer[i] < 128) {
4395 continue;
4396 }
4397 if ((i + 5) < length) { // see if it's legal supplementary character
4398 if (UTF8::is_supplementary_character(&buffer[i])) {
4399 c = UTF8::get_supplementary_character(&buffer[i]);
4400 i += 5;
4401 continue;
4402 }
4403 }
4404 switch (buffer[i] >> 4) {
4405 default: break;
4406 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4407 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4408 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4409 c = (buffer[i] & 0x1F) << 6;
4410 i++;
4411 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4412 c += buffer[i] & 0x3F;
4413 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4414 // for classes with major > 47, c must a null or a character in its shortest form
4415 break;
4416 }
4417 }
4418 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4419 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4420 c = (buffer[i] & 0xF) << 12;
4421 i += 2;
4422 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4423 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4424 if (_major_version <= 47 || c >= 0x800) {
4425 // for classes with major > 47, c must be in its shortest form
4426 break;
4427 }
4428 }
4429 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4430 } // end of switch
4431 } // end of for
4432 }
4434 // Checks if name is a legal class name.
4435 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4436 if (!_need_verify || _relax_verify) { return; }
4438 char buf[fixed_buffer_size];
4439 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4440 unsigned int length = name->utf8_length();
4441 bool legal = false;
4443 if (length > 0) {
4444 char* p;
4445 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4446 p = skip_over_field_signature(bytes, false, length, CHECK);
4447 legal = (p != NULL) && ((p - bytes) == (int)length);
4448 } else if (_major_version < JAVA_1_5_VERSION) {
4449 if (bytes[0] != '<') {
4450 p = skip_over_field_name(bytes, true, length);
4451 legal = (p != NULL) && ((p - bytes) == (int)length);
4452 }
4453 } else {
4454 // 4900761: relax the constraints based on JSR202 spec
4455 // Class names may be drawn from the entire Unicode character set.
4456 // Identifiers between '/' must be unqualified names.
4457 // The utf8 string has been verified when parsing cpool entries.
4458 legal = verify_unqualified_name(bytes, length, LegalClass);
4459 }
4460 }
4461 if (!legal) {
4462 ResourceMark rm(THREAD);
4463 Exceptions::fthrow(
4464 THREAD_AND_LOCATION,
4465 vmSymbols::java_lang_ClassFormatError(),
4466 "Illegal class name \"%s\" in class file %s", bytes,
4467 _class_name->as_C_string()
4468 );
4469 return;
4470 }
4471 }
4473 // Checks if name is a legal field name.
4474 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4475 if (!_need_verify || _relax_verify) { return; }
4477 char buf[fixed_buffer_size];
4478 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4479 unsigned int length = name->utf8_length();
4480 bool legal = false;
4482 if (length > 0) {
4483 if (_major_version < JAVA_1_5_VERSION) {
4484 if (bytes[0] != '<') {
4485 char* p = skip_over_field_name(bytes, false, length);
4486 legal = (p != NULL) && ((p - bytes) == (int)length);
4487 }
4488 } else {
4489 // 4881221: relax the constraints based on JSR202 spec
4490 legal = verify_unqualified_name(bytes, length, LegalField);
4491 }
4492 }
4494 if (!legal) {
4495 ResourceMark rm(THREAD);
4496 Exceptions::fthrow(
4497 THREAD_AND_LOCATION,
4498 vmSymbols::java_lang_ClassFormatError(),
4499 "Illegal field name \"%s\" in class %s", bytes,
4500 _class_name->as_C_string()
4501 );
4502 return;
4503 }
4504 }
4506 // Checks if name is a legal method name.
4507 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4508 if (!_need_verify || _relax_verify) { return; }
4510 assert(name != NULL, "method name is null");
4511 char buf[fixed_buffer_size];
4512 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4513 unsigned int length = name->utf8_length();
4514 bool legal = false;
4516 if (length > 0) {
4517 if (bytes[0] == '<') {
4518 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4519 legal = true;
4520 }
4521 } else if (_major_version < JAVA_1_5_VERSION) {
4522 char* p;
4523 p = skip_over_field_name(bytes, false, length);
4524 legal = (p != NULL) && ((p - bytes) == (int)length);
4525 } else {
4526 // 4881221: relax the constraints based on JSR202 spec
4527 legal = verify_unqualified_name(bytes, length, LegalMethod);
4528 }
4529 }
4531 if (!legal) {
4532 ResourceMark rm(THREAD);
4533 Exceptions::fthrow(
4534 THREAD_AND_LOCATION,
4535 vmSymbols::java_lang_ClassFormatError(),
4536 "Illegal method name \"%s\" in class %s", bytes,
4537 _class_name->as_C_string()
4538 );
4539 return;
4540 }
4541 }
4544 // Checks if signature is a legal field signature.
4545 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4546 if (!_need_verify) { return; }
4548 char buf[fixed_buffer_size];
4549 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4550 unsigned int length = signature->utf8_length();
4551 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4553 if (p == NULL || (p - bytes) != (int)length) {
4554 throwIllegalSignature("Field", name, signature, CHECK);
4555 }
4556 }
4558 // Checks if signature is a legal method signature.
4559 // Returns number of parameters
4560 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4561 if (!_need_verify) {
4562 // make sure caller's args_size will be less than 0 even for non-static
4563 // method so it will be recomputed in compute_size_of_parameters().
4564 return -2;
4565 }
4567 unsigned int args_size = 0;
4568 char buf[fixed_buffer_size];
4569 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4570 unsigned int length = signature->utf8_length();
4571 char* nextp;
4573 // The first character must be a '('
4574 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4575 length--;
4576 // Skip over legal field signatures
4577 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4578 while ((length > 0) && (nextp != NULL)) {
4579 args_size++;
4580 if (p[0] == 'J' || p[0] == 'D') {
4581 args_size++;
4582 }
4583 length -= nextp - p;
4584 p = nextp;
4585 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4586 }
4587 // The first non-signature thing better be a ')'
4588 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4589 length--;
4590 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4591 // All internal methods must return void
4592 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4593 return args_size;
4594 }
4595 } else {
4596 // Now we better just have a return value
4597 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4598 if (nextp && ((int)length == (nextp - p))) {
4599 return args_size;
4600 }
4601 }
4602 }
4603 }
4604 // Report error
4605 throwIllegalSignature("Method", name, signature, CHECK_0);
4606 return 0;
4607 }
4610 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4611 // Method names also may not contain the characters '<' or '>', unless <init>
4612 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4613 // method. Because these names have been checked as special cases before
4614 // calling this method in verify_legal_method_name.
4615 bool ClassFileParser::verify_unqualified_name(
4616 char* name, unsigned int length, int type) {
4617 jchar ch;
4619 for (char* p = name; p != name + length; ) {
4620 ch = *p;
4621 if (ch < 128) {
4622 p++;
4623 if (ch == '.' || ch == ';' || ch == '[' ) {
4624 return false; // do not permit '.', ';', or '['
4625 }
4626 if (type != LegalClass && ch == '/') {
4627 return false; // do not permit '/' unless it's class name
4628 }
4629 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4630 return false; // do not permit '<' or '>' in method names
4631 }
4632 } else {
4633 char* tmp_p = UTF8::next(p, &ch);
4634 p = tmp_p;
4635 }
4636 }
4637 return true;
4638 }
4641 // Take pointer to a string. Skip over the longest part of the string that could
4642 // be taken as a fieldname. Allow '/' if slash_ok is true.
4643 // Return a pointer to just past the fieldname.
4644 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4645 // being true, we saw consecutive slashes (meaning we were looking for a
4646 // qualified path but found something that was badly-formed).
4647 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4648 char* p;
4649 jchar ch;
4650 jboolean last_is_slash = false;
4651 jboolean not_first_ch = false;
4653 for (p = name; p != name + length; not_first_ch = true) {
4654 char* old_p = p;
4655 ch = *p;
4656 if (ch < 128) {
4657 p++;
4658 // quick check for ascii
4659 if ((ch >= 'a' && ch <= 'z') ||
4660 (ch >= 'A' && ch <= 'Z') ||
4661 (ch == '_' || ch == '$') ||
4662 (not_first_ch && ch >= '0' && ch <= '9')) {
4663 last_is_slash = false;
4664 continue;
4665 }
4666 if (slash_ok && ch == '/') {
4667 if (last_is_slash) {
4668 return NULL; // Don't permit consecutive slashes
4669 }
4670 last_is_slash = true;
4671 continue;
4672 }
4673 } else {
4674 jint unicode_ch;
4675 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4676 p = tmp_p;
4677 last_is_slash = false;
4678 // Check if ch is Java identifier start or is Java identifier part
4679 // 4672820: call java.lang.Character methods directly without generating separate tables.
4680 EXCEPTION_MARK;
4681 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4683 // return value
4684 JavaValue result(T_BOOLEAN);
4685 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4686 JavaCallArguments args;
4687 args.push_int(unicode_ch);
4689 // public static boolean isJavaIdentifierStart(char ch);
4690 JavaCalls::call_static(&result,
4691 klass,
4692 vmSymbols::isJavaIdentifierStart_name(),
4693 vmSymbols::int_bool_signature(),
4694 &args,
4695 THREAD);
4697 if (HAS_PENDING_EXCEPTION) {
4698 CLEAR_PENDING_EXCEPTION;
4699 return 0;
4700 }
4701 if (result.get_jboolean()) {
4702 continue;
4703 }
4705 if (not_first_ch) {
4706 // public static boolean isJavaIdentifierPart(char ch);
4707 JavaCalls::call_static(&result,
4708 klass,
4709 vmSymbols::isJavaIdentifierPart_name(),
4710 vmSymbols::int_bool_signature(),
4711 &args,
4712 THREAD);
4714 if (HAS_PENDING_EXCEPTION) {
4715 CLEAR_PENDING_EXCEPTION;
4716 return 0;
4717 }
4719 if (result.get_jboolean()) {
4720 continue;
4721 }
4722 }
4723 }
4724 return (not_first_ch) ? old_p : NULL;
4725 }
4726 return (not_first_ch) ? p : NULL;
4727 }
4730 // Take pointer to a string. Skip over the longest part of the string that could
4731 // be taken as a field signature. Allow "void" if void_ok.
4732 // Return a pointer to just past the signature.
4733 // Return NULL if no legal signature is found.
4734 char* ClassFileParser::skip_over_field_signature(char* signature,
4735 bool void_ok,
4736 unsigned int length,
4737 TRAPS) {
4738 unsigned int array_dim = 0;
4739 while (length > 0) {
4740 switch (signature[0]) {
4741 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4742 case JVM_SIGNATURE_BOOLEAN:
4743 case JVM_SIGNATURE_BYTE:
4744 case JVM_SIGNATURE_CHAR:
4745 case JVM_SIGNATURE_SHORT:
4746 case JVM_SIGNATURE_INT:
4747 case JVM_SIGNATURE_FLOAT:
4748 case JVM_SIGNATURE_LONG:
4749 case JVM_SIGNATURE_DOUBLE:
4750 return signature + 1;
4751 case JVM_SIGNATURE_CLASS: {
4752 if (_major_version < JAVA_1_5_VERSION) {
4753 // Skip over the class name if one is there
4754 char* p = skip_over_field_name(signature + 1, true, --length);
4756 // The next character better be a semicolon
4757 if (p && (p - signature) > 1 && p[0] == ';') {
4758 return p + 1;
4759 }
4760 } else {
4761 // 4900761: For class version > 48, any unicode is allowed in class name.
4762 length--;
4763 signature++;
4764 while (length > 0 && signature[0] != ';') {
4765 if (signature[0] == '.') {
4766 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4767 }
4768 length--;
4769 signature++;
4770 }
4771 if (signature[0] == ';') { return signature + 1; }
4772 }
4774 return NULL;
4775 }
4776 case JVM_SIGNATURE_ARRAY:
4777 array_dim++;
4778 if (array_dim > 255) {
4779 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4780 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4781 }
4782 // The rest of what's there better be a legal signature
4783 signature++;
4784 length--;
4785 void_ok = false;
4786 break;
4788 default:
4789 return NULL;
4790 }
4791 }
4792 return NULL;
4793 }