Mon, 24 Dec 2012 11:46:38 -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 AnnotationArray** field_type_annotations,
910 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
911 TRAPS) {
912 ClassFileStream* cfs = stream();
913 assert(attributes_count > 0, "length should be greater than 0");
914 u2 constantvalue_index = 0;
915 u2 generic_signature_index = 0;
916 bool is_synthetic = false;
917 u1* runtime_visible_annotations = NULL;
918 int runtime_visible_annotations_length = 0;
919 u1* runtime_invisible_annotations = NULL;
920 int runtime_invisible_annotations_length = 0;
921 u1* runtime_visible_type_annotations = NULL;
922 int runtime_visible_type_annotations_length = 0;
923 u1* runtime_invisible_type_annotations = NULL;
924 int runtime_invisible_type_annotations_length = 0;
925 while (attributes_count--) {
926 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
927 u2 attribute_name_index = cfs->get_u2_fast();
928 u4 attribute_length = cfs->get_u4_fast();
929 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
930 cp->tag_at(attribute_name_index).is_utf8(),
931 "Invalid field attribute index %u in class file %s",
932 attribute_name_index,
933 CHECK);
934 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
935 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
936 // ignore if non-static
937 if (constantvalue_index != 0) {
938 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
939 }
940 check_property(
941 attribute_length == 2,
942 "Invalid ConstantValue field attribute length %u in class file %s",
943 attribute_length, CHECK);
944 constantvalue_index = cfs->get_u2(CHECK);
945 if (_need_verify) {
946 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
947 }
948 } else if (attribute_name == vmSymbols::tag_synthetic()) {
949 if (attribute_length != 0) {
950 classfile_parse_error(
951 "Invalid Synthetic field attribute length %u in class file %s",
952 attribute_length, CHECK);
953 }
954 is_synthetic = true;
955 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
956 if (attribute_length != 0) {
957 classfile_parse_error(
958 "Invalid Deprecated field attribute length %u in class file %s",
959 attribute_length, CHECK);
960 }
961 } else if (_major_version >= JAVA_1_5_VERSION) {
962 if (attribute_name == vmSymbols::tag_signature()) {
963 if (attribute_length != 2) {
964 classfile_parse_error(
965 "Wrong size %u for field's Signature attribute in class file %s",
966 attribute_length, CHECK);
967 }
968 generic_signature_index = cfs->get_u2(CHECK);
969 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
970 runtime_visible_annotations_length = attribute_length;
971 runtime_visible_annotations = cfs->get_u1_buffer();
972 assert(runtime_visible_annotations != NULL, "null visible annotations");
973 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
974 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
975 runtime_invisible_annotations_length = attribute_length;
976 runtime_invisible_annotations = cfs->get_u1_buffer();
977 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
978 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
979 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
980 runtime_visible_type_annotations_length = attribute_length;
981 runtime_visible_type_annotations = cfs->get_u1_buffer();
982 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
983 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
984 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
985 runtime_invisible_type_annotations_length = attribute_length;
986 runtime_invisible_type_annotations = cfs->get_u1_buffer();
987 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
988 cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK);
989 } else {
990 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
991 }
992 } else {
993 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
994 }
995 }
997 *constantvalue_index_addr = constantvalue_index;
998 *is_synthetic_addr = is_synthetic;
999 *generic_signature_index_addr = generic_signature_index;
1000 *field_annotations = assemble_annotations(loader_data,
1001 runtime_visible_annotations,
1002 runtime_visible_annotations_length,
1003 runtime_invisible_annotations,
1004 runtime_invisible_annotations_length,
1005 CHECK);
1006 *field_type_annotations = assemble_annotations(loader_data,
1007 runtime_visible_type_annotations,
1008 runtime_visible_type_annotations_length,
1009 runtime_invisible_type_annotations,
1010 runtime_invisible_type_annotations_length,
1011 CHECK);
1012 return;
1013 }
1016 // Field allocation types. Used for computing field offsets.
1018 enum FieldAllocationType {
1019 STATIC_OOP, // Oops
1020 STATIC_BYTE, // Boolean, Byte, char
1021 STATIC_SHORT, // shorts
1022 STATIC_WORD, // ints
1023 STATIC_DOUBLE, // aligned long or double
1024 NONSTATIC_OOP,
1025 NONSTATIC_BYTE,
1026 NONSTATIC_SHORT,
1027 NONSTATIC_WORD,
1028 NONSTATIC_DOUBLE,
1029 MAX_FIELD_ALLOCATION_TYPE,
1030 BAD_ALLOCATION_TYPE = -1
1031 };
1033 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1034 BAD_ALLOCATION_TYPE, // 0
1035 BAD_ALLOCATION_TYPE, // 1
1036 BAD_ALLOCATION_TYPE, // 2
1037 BAD_ALLOCATION_TYPE, // 3
1038 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1039 NONSTATIC_SHORT, // T_CHAR = 5,
1040 NONSTATIC_WORD, // T_FLOAT = 6,
1041 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1042 NONSTATIC_BYTE, // T_BYTE = 8,
1043 NONSTATIC_SHORT, // T_SHORT = 9,
1044 NONSTATIC_WORD, // T_INT = 10,
1045 NONSTATIC_DOUBLE, // T_LONG = 11,
1046 NONSTATIC_OOP, // T_OBJECT = 12,
1047 NONSTATIC_OOP, // T_ARRAY = 13,
1048 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1049 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1050 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1051 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1052 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1053 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1054 BAD_ALLOCATION_TYPE, // 0
1055 BAD_ALLOCATION_TYPE, // 1
1056 BAD_ALLOCATION_TYPE, // 2
1057 BAD_ALLOCATION_TYPE, // 3
1058 STATIC_BYTE , // T_BOOLEAN = 4,
1059 STATIC_SHORT, // T_CHAR = 5,
1060 STATIC_WORD, // T_FLOAT = 6,
1061 STATIC_DOUBLE, // T_DOUBLE = 7,
1062 STATIC_BYTE, // T_BYTE = 8,
1063 STATIC_SHORT, // T_SHORT = 9,
1064 STATIC_WORD, // T_INT = 10,
1065 STATIC_DOUBLE, // T_LONG = 11,
1066 STATIC_OOP, // T_OBJECT = 12,
1067 STATIC_OOP, // T_ARRAY = 13,
1068 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1069 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1070 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1071 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1072 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1073 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1074 };
1076 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1077 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1078 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1079 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1080 return result;
1081 }
1083 class FieldAllocationCount: public ResourceObj {
1084 public:
1085 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1087 FieldAllocationCount() {
1088 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1089 count[i] = 0;
1090 }
1091 }
1093 FieldAllocationType update(bool is_static, BasicType type) {
1094 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1095 // Make sure there is no overflow with injected fields.
1096 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1097 count[atype]++;
1098 return atype;
1099 }
1100 };
1102 Array<u2>* ClassFileParser::parse_fields(ClassLoaderData* loader_data,
1103 Symbol* class_name,
1104 constantPoolHandle cp,
1105 bool is_interface,
1106 FieldAllocationCount *fac,
1107 Array<AnnotationArray*>** fields_annotations,
1108 Array<AnnotationArray*>** fields_type_annotations,
1109 u2* java_fields_count_ptr, TRAPS) {
1110 ClassFileStream* cfs = stream();
1111 cfs->guarantee_more(2, CHECK_NULL); // length
1112 u2 length = cfs->get_u2_fast();
1113 *java_fields_count_ptr = length;
1115 int num_injected = 0;
1116 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1117 int total_fields = length + num_injected;
1119 // The field array starts with tuples of shorts
1120 // [access, name index, sig index, initial value index, byte offset].
1121 // A generic signature slot only exists for field with generic
1122 // signature attribute. And the access flag is set with
1123 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1124 // signature slots are at the end of the field array and after all
1125 // other fields data.
1126 //
1127 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1128 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1129 // ...
1130 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1131 // [generic signature index]
1132 // [generic signature index]
1133 // ...
1134 //
1135 // Allocate a temporary resource array for field data. For each field,
1136 // a slot is reserved in the temporary array for the generic signature
1137 // index. After parsing all fields, the data are copied to a permanent
1138 // array and any unused slots will be discarded.
1139 ResourceMark rm(THREAD);
1140 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1141 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1143 AnnotationArray* field_annotations = NULL;
1144 AnnotationArray* field_type_annotations = NULL;
1145 // The generic signature slots start after all other fields' data.
1146 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1147 int num_generic_signature = 0;
1148 for (int n = 0; n < length; n++) {
1149 cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count
1151 AccessFlags access_flags;
1152 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1153 verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1154 access_flags.set_flags(flags);
1156 u2 name_index = cfs->get_u2_fast();
1157 int cp_size = cp->length();
1158 check_property(
1159 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1160 "Invalid constant pool index %u for field name in class file %s",
1161 name_index, CHECK_NULL);
1162 Symbol* name = cp->symbol_at(name_index);
1163 verify_legal_field_name(name, CHECK_NULL);
1165 u2 signature_index = cfs->get_u2_fast();
1166 check_property(
1167 valid_cp_range(signature_index, cp_size) &&
1168 cp->tag_at(signature_index).is_utf8(),
1169 "Invalid constant pool index %u for field signature in class file %s",
1170 signature_index, CHECK_NULL);
1171 Symbol* sig = cp->symbol_at(signature_index);
1172 verify_legal_field_signature(name, sig, CHECK_NULL);
1174 u2 constantvalue_index = 0;
1175 bool is_synthetic = false;
1176 u2 generic_signature_index = 0;
1177 bool is_static = access_flags.is_static();
1178 FieldAnnotationCollector parsed_annotations;
1180 u2 attributes_count = cfs->get_u2_fast();
1181 if (attributes_count > 0) {
1182 parse_field_attributes(loader_data,
1183 cp, attributes_count, is_static, signature_index,
1184 &constantvalue_index, &is_synthetic,
1185 &generic_signature_index, &field_annotations,
1186 &field_type_annotations, &parsed_annotations,
1187 CHECK_NULL);
1188 if (field_annotations != NULL) {
1189 if (*fields_annotations == NULL) {
1190 *fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1191 loader_data, length, NULL,
1192 CHECK_NULL);
1193 }
1194 (*fields_annotations)->at_put(n, field_annotations);
1195 }
1196 if (field_type_annotations != NULL) {
1197 if (*fields_type_annotations == NULL) {
1198 *fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
1199 loader_data, length, NULL,
1200 CHECK_NULL);
1201 }
1202 (*fields_type_annotations)->at_put(n, field_type_annotations);
1203 }
1204 if (is_synthetic) {
1205 access_flags.set_is_synthetic();
1206 }
1207 if (generic_signature_index != 0) {
1208 access_flags.set_field_has_generic_signature();
1209 fa[generic_signature_slot] = generic_signature_index;
1210 generic_signature_slot ++;
1211 num_generic_signature ++;
1212 }
1213 }
1215 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1216 field->initialize(access_flags.as_short(),
1217 name_index,
1218 signature_index,
1219 constantvalue_index,
1220 0);
1221 if (parsed_annotations.has_any_annotations())
1222 parsed_annotations.apply_to(field);
1224 BasicType type = cp->basic_type_for_signature_at(signature_index);
1226 // Remember how many oops we encountered and compute allocation type
1227 FieldAllocationType atype = fac->update(is_static, type);
1229 // The correct offset is computed later (all oop fields will be located together)
1230 // We temporarily store the allocation type in the offset field
1231 field->set_offset(atype);
1232 }
1234 int index = length;
1235 if (num_injected != 0) {
1236 for (int n = 0; n < num_injected; n++) {
1237 // Check for duplicates
1238 if (injected[n].may_be_java) {
1239 Symbol* name = injected[n].name();
1240 Symbol* signature = injected[n].signature();
1241 bool duplicate = false;
1242 for (int i = 0; i < length; i++) {
1243 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1244 if (name == cp->symbol_at(f->name_index()) &&
1245 signature == cp->symbol_at(f->signature_index())) {
1246 // Symbol is desclared in Java so skip this one
1247 duplicate = true;
1248 break;
1249 }
1250 }
1251 if (duplicate) {
1252 // These will be removed from the field array at the end
1253 continue;
1254 }
1255 }
1257 // Injected field
1258 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1259 field->initialize(JVM_ACC_FIELD_INTERNAL,
1260 injected[n].name_index,
1261 injected[n].signature_index,
1262 0,
1263 0);
1265 BasicType type = FieldType::basic_type(injected[n].signature());
1267 // Remember how many oops we encountered and compute allocation type
1268 FieldAllocationType atype = fac->update(false, type);
1270 // The correct offset is computed later (all oop fields will be located together)
1271 // We temporarily store the allocation type in the offset field
1272 field->set_offset(atype);
1273 index++;
1274 }
1275 }
1277 // Now copy the fields' data from the temporary resource array.
1278 // Sometimes injected fields already exist in the Java source so
1279 // the fields array could be too long. In that case the
1280 // fields array is trimed. Also unused slots that were reserved
1281 // for generic signature indexes are discarded.
1282 Array<u2>* fields = MetadataFactory::new_array<u2>(
1283 loader_data, index * FieldInfo::field_slots + num_generic_signature,
1284 CHECK_NULL);
1285 {
1286 int i = 0;
1287 for (; i < index * FieldInfo::field_slots; i++) {
1288 fields->at_put(i, fa[i]);
1289 }
1290 for (int j = total_fields * FieldInfo::field_slots;
1291 j < generic_signature_slot; j++) {
1292 fields->at_put(i++, fa[j]);
1293 }
1294 assert(i == fields->length(), "");
1295 }
1297 if (_need_verify && length > 1) {
1298 // Check duplicated fields
1299 ResourceMark rm(THREAD);
1300 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1301 THREAD, NameSigHash*, HASH_ROW_SIZE);
1302 initialize_hashtable(names_and_sigs);
1303 bool dup = false;
1304 {
1305 debug_only(No_Safepoint_Verifier nsv;)
1306 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1307 Symbol* name = fs.name();
1308 Symbol* sig = fs.signature();
1309 // If no duplicates, add name/signature in hashtable names_and_sigs.
1310 if (!put_after_lookup(name, sig, names_and_sigs)) {
1311 dup = true;
1312 break;
1313 }
1314 }
1315 }
1316 if (dup) {
1317 classfile_parse_error("Duplicate field name&signature in class file %s",
1318 CHECK_NULL);
1319 }
1320 }
1322 return fields;
1323 }
1326 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1327 while (length-- > 0) {
1328 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1329 }
1330 }
1333 u2* ClassFileParser::parse_exception_table(ClassLoaderData* loader_data,
1334 u4 code_length,
1335 u4 exception_table_length,
1336 constantPoolHandle cp,
1337 TRAPS) {
1338 ClassFileStream* cfs = stream();
1340 u2* exception_table_start = cfs->get_u2_buffer();
1341 assert(exception_table_start != NULL, "null exception table");
1342 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1343 // Will check legal target after parsing code array in verifier.
1344 if (_need_verify) {
1345 for (unsigned int i = 0; i < exception_table_length; i++) {
1346 u2 start_pc = cfs->get_u2_fast();
1347 u2 end_pc = cfs->get_u2_fast();
1348 u2 handler_pc = cfs->get_u2_fast();
1349 u2 catch_type_index = cfs->get_u2_fast();
1350 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1351 "Illegal exception table range in class file %s",
1352 CHECK_NULL);
1353 guarantee_property(handler_pc < code_length,
1354 "Illegal exception table handler in class file %s",
1355 CHECK_NULL);
1356 if (catch_type_index != 0) {
1357 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1358 is_klass_reference(cp, catch_type_index),
1359 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1360 }
1361 }
1362 } else {
1363 cfs->skip_u2_fast(exception_table_length * 4);
1364 }
1365 return exception_table_start;
1366 }
1368 void ClassFileParser::parse_linenumber_table(
1369 u4 code_attribute_length, u4 code_length,
1370 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1371 ClassFileStream* cfs = stream();
1372 unsigned int num_entries = cfs->get_u2(CHECK);
1374 // Each entry is a u2 start_pc, and a u2 line_number
1375 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1377 // Verify line number attribute and table length
1378 check_property(
1379 code_attribute_length == sizeof(u2) + length_in_bytes,
1380 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1382 cfs->guarantee_more(length_in_bytes, CHECK);
1384 if ((*write_stream) == NULL) {
1385 if (length_in_bytes > fixed_buffer_size) {
1386 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1387 } else {
1388 (*write_stream) = new CompressedLineNumberWriteStream(
1389 linenumbertable_buffer, fixed_buffer_size);
1390 }
1391 }
1393 while (num_entries-- > 0) {
1394 u2 bci = cfs->get_u2_fast(); // start_pc
1395 u2 line = cfs->get_u2_fast(); // line_number
1396 guarantee_property(bci < code_length,
1397 "Invalid pc in LineNumberTable in class file %s", CHECK);
1398 (*write_stream)->write_pair(bci, line);
1399 }
1400 }
1403 // Class file LocalVariableTable elements.
1404 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1405 public:
1406 u2 start_bci;
1407 u2 length;
1408 u2 name_cp_index;
1409 u2 descriptor_cp_index;
1410 u2 slot;
1411 };
1414 class LVT_Hash: public CHeapObj<mtClass> {
1415 public:
1416 LocalVariableTableElement *_elem; // element
1417 LVT_Hash* _next; // Next entry in hash table
1418 };
1420 unsigned int hash(LocalVariableTableElement *elem) {
1421 unsigned int raw_hash = elem->start_bci;
1423 raw_hash = elem->length + raw_hash * 37;
1424 raw_hash = elem->name_cp_index + raw_hash * 37;
1425 raw_hash = elem->slot + raw_hash * 37;
1427 return raw_hash % HASH_ROW_SIZE;
1428 }
1430 void initialize_hashtable(LVT_Hash** table) {
1431 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1432 table[i] = NULL;
1433 }
1434 }
1436 void clear_hashtable(LVT_Hash** table) {
1437 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1438 LVT_Hash* current = table[i];
1439 LVT_Hash* next;
1440 while (current != NULL) {
1441 next = current->_next;
1442 current->_next = NULL;
1443 delete(current);
1444 current = next;
1445 }
1446 table[i] = NULL;
1447 }
1448 }
1450 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1451 LVT_Hash* entry = table[index];
1453 /*
1454 * 3-tuple start_bci/length/slot has to be unique key,
1455 * so the following comparison seems to be redundant:
1456 * && elem->name_cp_index == entry->_elem->name_cp_index
1457 */
1458 while (entry != NULL) {
1459 if (elem->start_bci == entry->_elem->start_bci
1460 && elem->length == entry->_elem->length
1461 && elem->name_cp_index == entry->_elem->name_cp_index
1462 && elem->slot == entry->_elem->slot
1463 ) {
1464 return entry;
1465 }
1466 entry = entry->_next;
1467 }
1468 return NULL;
1469 }
1471 // Return false if the local variable is found in table.
1472 // Return true if no duplicate is found.
1473 // And local variable is added as a new entry in table.
1474 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1475 // First lookup for duplicates
1476 int index = hash(elem);
1477 LVT_Hash* entry = LVT_lookup(elem, index, table);
1479 if (entry != NULL) {
1480 return false;
1481 }
1482 // No duplicate is found, allocate a new entry and fill it.
1483 if ((entry = new LVT_Hash()) == NULL) {
1484 return false;
1485 }
1486 entry->_elem = elem;
1488 // Insert into hash table
1489 entry->_next = table[index];
1490 table[index] = entry;
1492 return true;
1493 }
1495 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1496 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1497 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1498 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1499 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1500 lvt->signature_cp_index = 0;
1501 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1502 }
1504 // Function is used to parse both attributes:
1505 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1506 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1507 u2 max_locals,
1508 u4 code_attribute_length,
1509 constantPoolHandle cp,
1510 u2* localvariable_table_length,
1511 bool isLVTT,
1512 TRAPS) {
1513 ClassFileStream* cfs = stream();
1514 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1515 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1516 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1517 // Verify local variable table attribute has right length
1518 if (_need_verify) {
1519 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1520 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1521 }
1522 u2* localvariable_table_start = cfs->get_u2_buffer();
1523 assert(localvariable_table_start != NULL, "null local variable table");
1524 if (!_need_verify) {
1525 cfs->skip_u2_fast(size);
1526 } else {
1527 cfs->guarantee_more(size * 2, CHECK_NULL);
1528 for(int i = 0; i < (*localvariable_table_length); i++) {
1529 u2 start_pc = cfs->get_u2_fast();
1530 u2 length = cfs->get_u2_fast();
1531 u2 name_index = cfs->get_u2_fast();
1532 u2 descriptor_index = cfs->get_u2_fast();
1533 u2 index = cfs->get_u2_fast();
1534 // Assign to a u4 to avoid overflow
1535 u4 end_pc = (u4)start_pc + (u4)length;
1537 if (start_pc >= code_length) {
1538 classfile_parse_error(
1539 "Invalid start_pc %u in %s in class file %s",
1540 start_pc, tbl_name, CHECK_NULL);
1541 }
1542 if (end_pc > code_length) {
1543 classfile_parse_error(
1544 "Invalid length %u in %s in class file %s",
1545 length, tbl_name, CHECK_NULL);
1546 }
1547 int cp_size = cp->length();
1548 guarantee_property(
1549 valid_cp_range(name_index, cp_size) &&
1550 cp->tag_at(name_index).is_utf8(),
1551 "Name index %u in %s has bad constant type in class file %s",
1552 name_index, tbl_name, CHECK_NULL);
1553 guarantee_property(
1554 valid_cp_range(descriptor_index, cp_size) &&
1555 cp->tag_at(descriptor_index).is_utf8(),
1556 "Signature index %u in %s has bad constant type in class file %s",
1557 descriptor_index, tbl_name, CHECK_NULL);
1559 Symbol* name = cp->symbol_at(name_index);
1560 Symbol* sig = cp->symbol_at(descriptor_index);
1561 verify_legal_field_name(name, CHECK_NULL);
1562 u2 extra_slot = 0;
1563 if (!isLVTT) {
1564 verify_legal_field_signature(name, sig, CHECK_NULL);
1566 // 4894874: check special cases for double and long local variables
1567 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1568 sig == vmSymbols::type_signature(T_LONG)) {
1569 extra_slot = 1;
1570 }
1571 }
1572 guarantee_property((index + extra_slot) < max_locals,
1573 "Invalid index %u in %s in class file %s",
1574 index, tbl_name, CHECK_NULL);
1575 }
1576 }
1577 return localvariable_table_start;
1578 }
1581 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1582 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1583 ClassFileStream* cfs = stream();
1584 u2 index = 0; // index in the array with long/double occupying two slots
1585 u4 i1 = *u1_index;
1586 u4 i2 = *u2_index + 1;
1587 for(int i = 0; i < array_length; i++) {
1588 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1589 index++;
1590 if (tag == ITEM_Long || tag == ITEM_Double) {
1591 index++;
1592 } else if (tag == ITEM_Object) {
1593 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1594 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1595 is_klass_reference(cp, class_index),
1596 "Bad class index %u in StackMap in class file %s",
1597 class_index, CHECK);
1598 } else if (tag == ITEM_Uninitialized) {
1599 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1600 guarantee_property(
1601 offset < code_length,
1602 "Bad uninitialized type offset %u in StackMap in class file %s",
1603 offset, CHECK);
1604 } else {
1605 guarantee_property(
1606 tag <= (u1)ITEM_Uninitialized,
1607 "Unknown variable type %u in StackMap in class file %s",
1608 tag, CHECK);
1609 }
1610 }
1611 u2_array[*u2_index] = index;
1612 *u1_index = i1;
1613 *u2_index = i2;
1614 }
1616 Array<u1>* ClassFileParser::parse_stackmap_table(
1617 ClassLoaderData* loader_data,
1618 u4 code_attribute_length, TRAPS) {
1619 if (code_attribute_length == 0)
1620 return NULL;
1622 ClassFileStream* cfs = stream();
1623 u1* stackmap_table_start = cfs->get_u1_buffer();
1624 assert(stackmap_table_start != NULL, "null stackmap table");
1626 // check code_attribute_length first
1627 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1629 if (!_need_verify && !DumpSharedSpaces) {
1630 return NULL;
1631 }
1633 Array<u1>* stackmap_data =
1634 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL);
1636 memcpy((void*)stackmap_data->adr_at(0),
1637 (void*)stackmap_table_start, code_attribute_length);
1638 return stackmap_data;
1639 }
1641 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1642 u4 method_attribute_length,
1643 constantPoolHandle cp, TRAPS) {
1644 ClassFileStream* cfs = stream();
1645 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1646 *checked_exceptions_length = cfs->get_u2_fast();
1647 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1648 u2* checked_exceptions_start = cfs->get_u2_buffer();
1649 assert(checked_exceptions_start != NULL, "null checked exceptions");
1650 if (!_need_verify) {
1651 cfs->skip_u2_fast(size);
1652 } else {
1653 // Verify each value in the checked exception table
1654 u2 checked_exception;
1655 u2 len = *checked_exceptions_length;
1656 cfs->guarantee_more(2 * len, CHECK_NULL);
1657 for (int i = 0; i < len; i++) {
1658 checked_exception = cfs->get_u2_fast();
1659 check_property(
1660 valid_cp_range(checked_exception, cp->length()) &&
1661 is_klass_reference(cp, checked_exception),
1662 "Exception name has bad type at constant pool %u in class file %s",
1663 checked_exception, CHECK_NULL);
1664 }
1665 }
1666 // check exceptions attribute length
1667 if (_need_verify) {
1668 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1669 sizeof(u2) * size),
1670 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1671 }
1672 return checked_exceptions_start;
1673 }
1675 void ClassFileParser::throwIllegalSignature(
1676 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1677 ResourceMark rm(THREAD);
1678 Exceptions::fthrow(THREAD_AND_LOCATION,
1679 vmSymbols::java_lang_ClassFormatError(),
1680 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1681 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1682 }
1684 // Skip an annotation. Return >=limit if there is any problem.
1685 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1686 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1687 // value := switch (tag:u1) { ... }
1688 index += 2; // skip atype
1689 if ((index += 2) >= limit) return limit; // read nmem
1690 int nmem = Bytes::get_Java_u2(buffer+index-2);
1691 while (--nmem >= 0 && index < limit) {
1692 index += 2; // skip member
1693 index = skip_annotation_value(buffer, limit, index);
1694 }
1695 return index;
1696 }
1698 // Skip an annotation value. Return >=limit if there is any problem.
1699 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1700 // value := switch (tag:u1) {
1701 // case B, C, I, S, Z, D, F, J, c: con:u2;
1702 // case e: e_class:u2 e_name:u2;
1703 // case s: s_con:u2;
1704 // case [: do(nval:u2) {value};
1705 // case @: annotation;
1706 // case s: s_con:u2;
1707 // }
1708 if ((index += 1) >= limit) return limit; // read tag
1709 u1 tag = buffer[index-1];
1710 switch (tag) {
1711 case 'B': case 'C': case 'I': case 'S': case 'Z':
1712 case 'D': case 'F': case 'J': case 'c': case 's':
1713 index += 2; // skip con or s_con
1714 break;
1715 case 'e':
1716 index += 4; // skip e_class, e_name
1717 break;
1718 case '[':
1719 {
1720 if ((index += 2) >= limit) return limit; // read nval
1721 int nval = Bytes::get_Java_u2(buffer+index-2);
1722 while (--nval >= 0 && index < limit) {
1723 index = skip_annotation_value(buffer, limit, index);
1724 }
1725 }
1726 break;
1727 case '@':
1728 index = skip_annotation(buffer, limit, index);
1729 break;
1730 default:
1731 assert(false, "annotation tag");
1732 return limit; // bad tag byte
1733 }
1734 return index;
1735 }
1737 // Sift through annotations, looking for those significant to the VM:
1738 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1739 constantPoolHandle cp,
1740 ClassFileParser::AnnotationCollector* coll,
1741 TRAPS) {
1742 // annotations := do(nann:u2) {annotation}
1743 int index = 0;
1744 if ((index += 2) >= limit) return; // read nann
1745 int nann = Bytes::get_Java_u2(buffer+index-2);
1746 enum { // initial annotation layout
1747 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1748 count_off = 2, // u2 such as 1 (one value)
1749 member_off = 4, // utf8 such as 'value'
1750 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1751 e_tag_val = 'e',
1752 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1753 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1754 e_size = 11, // end of 'e' annotation
1755 c_tag_val = 'c',
1756 c_con_off = 7, // utf8 payload, such as 'I' or 'Ljava/lang/String;'
1757 c_size = 9, // end of 'c' annotation
1758 min_size = 6 // smallest possible size (zero members)
1759 };
1760 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1761 int index0 = index;
1762 index = skip_annotation(buffer, limit, index);
1763 u1* abase = buffer + index0;
1764 int atype = Bytes::get_Java_u2(abase + atype_off);
1765 int count = Bytes::get_Java_u2(abase + count_off);
1766 Symbol* aname = check_symbol_at(cp, atype);
1767 if (aname == NULL) break; // invalid annotation name
1768 Symbol* member = NULL;
1769 if (count >= 1) {
1770 int member_index = Bytes::get_Java_u2(abase + member_off);
1771 member = check_symbol_at(cp, member_index);
1772 if (member == NULL) break; // invalid member name
1773 }
1775 // Here is where parsing particular annotations will take place.
1776 AnnotationCollector::ID id = coll->annotation_index(aname);
1777 if (id == AnnotationCollector::_unknown) continue;
1778 coll->set_annotation(id);
1779 // If there are no values, just set the bit and move on:
1780 if (count == 0) continue;
1782 // For the record, here is how annotation payloads can be collected.
1783 // Suppose we want to capture @Retention.value. Here is how:
1784 //if (id == AnnotationCollector::_class_Retention) {
1785 // Symbol* payload = NULL;
1786 // if (count == 1
1787 // && e_size == (index0 - index) // match size
1788 // && e_tag_val == *(abase + tag_off)
1789 // && (check_symbol_at(cp, Bytes::get_Java_u2(abase + e_type_off))
1790 // == vmSymbols::RetentionPolicy_signature())
1791 // && member == vmSymbols::value_name()) {
1792 // payload = check_symbol_at(cp, Bytes::get_Java_u2(abase + e_con_off));
1793 // }
1794 // check_property(payload != NULL,
1795 // "Invalid @Retention annotation at offset %u in class file %s",
1796 // index0, CHECK);
1797 // if (payload != NULL) {
1798 // payload->increment_refcount();
1799 // coll->_class_RetentionPolicy = payload;
1800 // }
1801 //}
1802 }
1803 }
1805 ClassFileParser::AnnotationCollector::ID ClassFileParser::AnnotationCollector::annotation_index(Symbol* name) {
1806 vmSymbols::SID sid = vmSymbols::find_sid(name);
1807 switch (sid) {
1808 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1809 if (_location != _in_method) break; // only allow for methods
1810 return _method_ForceInline;
1811 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1812 if (_location != _in_method) break; // only allow for methods
1813 return _method_DontInline;
1814 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1815 if (_location != _in_method) break; // only allow for methods
1816 return _method_LambdaForm_Compiled;
1817 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1818 if (_location != _in_method) break; // only allow for methods
1819 return _method_LambdaForm_Hidden;
1820 default: break;
1821 }
1822 return AnnotationCollector::_unknown;
1823 }
1825 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1826 fatal("no field annotations yet");
1827 }
1829 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1830 if (has_annotation(_method_ForceInline))
1831 m->set_force_inline(true);
1832 if (has_annotation(_method_DontInline))
1833 m->set_dont_inline(true);
1834 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1835 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1836 if (has_annotation(_method_LambdaForm_Hidden))
1837 m->set_hidden(true);
1838 }
1840 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1841 fatal("no class annotations yet");
1842 }
1845 #define MAX_ARGS_SIZE 255
1846 #define MAX_CODE_SIZE 65535
1847 #define INITIAL_MAX_LVT_NUMBER 256
1849 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1850 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1851 // Method* to save footprint, so we only know the size of the resulting Method* when the
1852 // entire method attribute is parsed.
1853 //
1854 // The promoted_flags parameter is used to pass relevant access_flags
1855 // from the method back up to the containing klass. These flag values
1856 // are added to klass's access_flags.
1858 methodHandle ClassFileParser::parse_method(ClassLoaderData* loader_data,
1859 constantPoolHandle cp,
1860 bool is_interface,
1861 AccessFlags *promoted_flags,
1862 AnnotationArray** method_annotations,
1863 AnnotationArray** method_parameter_annotations,
1864 AnnotationArray** method_default_annotations,
1865 AnnotationArray** method_type_annotations,
1866 TRAPS) {
1867 ClassFileStream* cfs = stream();
1868 methodHandle nullHandle;
1869 ResourceMark rm(THREAD);
1870 // Parse fixed parts
1871 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1873 int flags = cfs->get_u2_fast();
1874 u2 name_index = cfs->get_u2_fast();
1875 int cp_size = cp->length();
1876 check_property(
1877 valid_cp_range(name_index, cp_size) &&
1878 cp->tag_at(name_index).is_utf8(),
1879 "Illegal constant pool index %u for method name in class file %s",
1880 name_index, CHECK_(nullHandle));
1881 Symbol* name = cp->symbol_at(name_index);
1882 verify_legal_method_name(name, CHECK_(nullHandle));
1884 u2 signature_index = cfs->get_u2_fast();
1885 guarantee_property(
1886 valid_cp_range(signature_index, cp_size) &&
1887 cp->tag_at(signature_index).is_utf8(),
1888 "Illegal constant pool index %u for method signature in class file %s",
1889 signature_index, CHECK_(nullHandle));
1890 Symbol* signature = cp->symbol_at(signature_index);
1892 AccessFlags access_flags;
1893 if (name == vmSymbols::class_initializer_name()) {
1894 // We ignore the other access flags for a valid class initializer.
1895 // (JVM Spec 2nd ed., chapter 4.6)
1896 if (_major_version < 51) { // backward compatibility
1897 flags = JVM_ACC_STATIC;
1898 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1899 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1900 }
1901 } else {
1902 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1903 }
1905 int args_size = -1; // only used when _need_verify is true
1906 if (_need_verify) {
1907 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1908 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1909 if (args_size > MAX_ARGS_SIZE) {
1910 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1911 }
1912 }
1914 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1916 // Default values for code and exceptions attribute elements
1917 u2 max_stack = 0;
1918 u2 max_locals = 0;
1919 u4 code_length = 0;
1920 u1* code_start = 0;
1921 u2 exception_table_length = 0;
1922 u2* exception_table_start = NULL;
1923 Array<int>* exception_handlers = Universe::the_empty_int_array();
1924 u2 checked_exceptions_length = 0;
1925 u2* checked_exceptions_start = NULL;
1926 CompressedLineNumberWriteStream* linenumber_table = NULL;
1927 int linenumber_table_length = 0;
1928 int total_lvt_length = 0;
1929 u2 lvt_cnt = 0;
1930 u2 lvtt_cnt = 0;
1931 bool lvt_allocated = false;
1932 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1933 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1934 u2* localvariable_table_length;
1935 u2** localvariable_table_start;
1936 u2* localvariable_type_table_length;
1937 u2** localvariable_type_table_start;
1938 bool parsed_code_attribute = false;
1939 bool parsed_checked_exceptions_attribute = false;
1940 bool parsed_stackmap_attribute = false;
1941 // stackmap attribute - JDK1.5
1942 Array<u1>* stackmap_data = NULL;
1943 u2 generic_signature_index = 0;
1944 MethodAnnotationCollector parsed_annotations;
1945 u1* runtime_visible_annotations = NULL;
1946 int runtime_visible_annotations_length = 0;
1947 u1* runtime_invisible_annotations = NULL;
1948 int runtime_invisible_annotations_length = 0;
1949 u1* runtime_visible_parameter_annotations = NULL;
1950 int runtime_visible_parameter_annotations_length = 0;
1951 u1* runtime_invisible_parameter_annotations = NULL;
1952 int runtime_invisible_parameter_annotations_length = 0;
1953 u1* runtime_visible_type_annotations = NULL;
1954 int runtime_visible_type_annotations_length = 0;
1955 u1* runtime_invisible_type_annotations = NULL;
1956 int runtime_invisible_type_annotations_length = 0;
1957 u1* annotation_default = NULL;
1958 int annotation_default_length = 0;
1960 // Parse code and exceptions attribute
1961 u2 method_attributes_count = cfs->get_u2_fast();
1962 while (method_attributes_count--) {
1963 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1964 u2 method_attribute_name_index = cfs->get_u2_fast();
1965 u4 method_attribute_length = cfs->get_u4_fast();
1966 check_property(
1967 valid_cp_range(method_attribute_name_index, cp_size) &&
1968 cp->tag_at(method_attribute_name_index).is_utf8(),
1969 "Invalid method attribute name index %u in class file %s",
1970 method_attribute_name_index, CHECK_(nullHandle));
1972 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1973 if (method_attribute_name == vmSymbols::tag_code()) {
1974 // Parse Code attribute
1975 if (_need_verify) {
1976 guarantee_property(
1977 !access_flags.is_native() && !access_flags.is_abstract(),
1978 "Code attribute in native or abstract methods in class file %s",
1979 CHECK_(nullHandle));
1980 }
1981 if (parsed_code_attribute) {
1982 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1983 }
1984 parsed_code_attribute = true;
1986 // Stack size, locals size, and code size
1987 if (_major_version == 45 && _minor_version <= 2) {
1988 cfs->guarantee_more(4, CHECK_(nullHandle));
1989 max_stack = cfs->get_u1_fast();
1990 max_locals = cfs->get_u1_fast();
1991 code_length = cfs->get_u2_fast();
1992 } else {
1993 cfs->guarantee_more(8, CHECK_(nullHandle));
1994 max_stack = cfs->get_u2_fast();
1995 max_locals = cfs->get_u2_fast();
1996 code_length = cfs->get_u4_fast();
1997 }
1998 if (_need_verify) {
1999 guarantee_property(args_size <= max_locals,
2000 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
2001 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2002 "Invalid method Code length %u in class file %s",
2003 code_length, CHECK_(nullHandle));
2004 }
2005 // Code pointer
2006 code_start = cfs->get_u1_buffer();
2007 assert(code_start != NULL, "null code start");
2008 cfs->guarantee_more(code_length, CHECK_(nullHandle));
2009 cfs->skip_u1_fast(code_length);
2011 // Exception handler table
2012 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
2013 exception_table_length = cfs->get_u2_fast();
2014 if (exception_table_length > 0) {
2015 exception_table_start =
2016 parse_exception_table(loader_data, code_length, exception_table_length, cp, CHECK_(nullHandle));
2017 }
2019 // Parse additional attributes in code attribute
2020 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
2021 u2 code_attributes_count = cfs->get_u2_fast();
2023 unsigned int calculated_attribute_length = 0;
2025 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2026 calculated_attribute_length =
2027 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2028 } else {
2029 // max_stack, locals and length are smaller in pre-version 45.2 classes
2030 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2031 }
2032 calculated_attribute_length +=
2033 code_length +
2034 sizeof(exception_table_length) +
2035 sizeof(code_attributes_count) +
2036 exception_table_length *
2037 ( sizeof(u2) + // start_pc
2038 sizeof(u2) + // end_pc
2039 sizeof(u2) + // handler_pc
2040 sizeof(u2) ); // catch_type_index
2042 while (code_attributes_count--) {
2043 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
2044 u2 code_attribute_name_index = cfs->get_u2_fast();
2045 u4 code_attribute_length = cfs->get_u4_fast();
2046 calculated_attribute_length += code_attribute_length +
2047 sizeof(code_attribute_name_index) +
2048 sizeof(code_attribute_length);
2049 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
2050 cp->tag_at(code_attribute_name_index).is_utf8(),
2051 "Invalid code attribute name index %u in class file %s",
2052 code_attribute_name_index,
2053 CHECK_(nullHandle));
2054 if (LoadLineNumberTables &&
2055 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2056 // Parse and compress line number table
2057 parse_linenumber_table(code_attribute_length, code_length,
2058 &linenumber_table, CHECK_(nullHandle));
2060 } else if (LoadLocalVariableTables &&
2061 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2062 // Parse local variable table
2063 if (!lvt_allocated) {
2064 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2065 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2066 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2067 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2068 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2069 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2070 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2071 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2072 lvt_allocated = true;
2073 }
2074 if (lvt_cnt == max_lvt_cnt) {
2075 max_lvt_cnt <<= 1;
2076 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2077 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2078 }
2079 localvariable_table_start[lvt_cnt] =
2080 parse_localvariable_table(code_length,
2081 max_locals,
2082 code_attribute_length,
2083 cp,
2084 &localvariable_table_length[lvt_cnt],
2085 false, // is not LVTT
2086 CHECK_(nullHandle));
2087 total_lvt_length += localvariable_table_length[lvt_cnt];
2088 lvt_cnt++;
2089 } else if (LoadLocalVariableTypeTables &&
2090 _major_version >= JAVA_1_5_VERSION &&
2091 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2092 if (!lvt_allocated) {
2093 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2094 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2095 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2096 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2097 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2098 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2099 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2100 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2101 lvt_allocated = true;
2102 }
2103 // Parse local variable type table
2104 if (lvtt_cnt == max_lvtt_cnt) {
2105 max_lvtt_cnt <<= 1;
2106 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2107 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2108 }
2109 localvariable_type_table_start[lvtt_cnt] =
2110 parse_localvariable_table(code_length,
2111 max_locals,
2112 code_attribute_length,
2113 cp,
2114 &localvariable_type_table_length[lvtt_cnt],
2115 true, // is LVTT
2116 CHECK_(nullHandle));
2117 lvtt_cnt++;
2118 } else if (UseSplitVerifier &&
2119 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2120 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2121 // Stack map is only needed by the new verifier in JDK1.5.
2122 if (parsed_stackmap_attribute) {
2123 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2124 }
2125 stackmap_data = parse_stackmap_table(loader_data, code_attribute_length, CHECK_(nullHandle));
2126 parsed_stackmap_attribute = true;
2127 } else {
2128 // Skip unknown attributes
2129 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2130 }
2131 }
2132 // check method attribute length
2133 if (_need_verify) {
2134 guarantee_property(method_attribute_length == calculated_attribute_length,
2135 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2136 }
2137 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2138 // Parse Exceptions attribute
2139 if (parsed_checked_exceptions_attribute) {
2140 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2141 }
2142 parsed_checked_exceptions_attribute = true;
2143 checked_exceptions_start =
2144 parse_checked_exceptions(&checked_exceptions_length,
2145 method_attribute_length,
2146 cp, CHECK_(nullHandle));
2147 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2148 if (method_attribute_length != 0) {
2149 classfile_parse_error(
2150 "Invalid Synthetic method attribute length %u in class file %s",
2151 method_attribute_length, CHECK_(nullHandle));
2152 }
2153 // Should we check that there hasn't already been a synthetic attribute?
2154 access_flags.set_is_synthetic();
2155 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2156 if (method_attribute_length != 0) {
2157 classfile_parse_error(
2158 "Invalid Deprecated method attribute length %u in class file %s",
2159 method_attribute_length, CHECK_(nullHandle));
2160 }
2161 } else if (_major_version >= JAVA_1_5_VERSION) {
2162 if (method_attribute_name == vmSymbols::tag_signature()) {
2163 if (method_attribute_length != 2) {
2164 classfile_parse_error(
2165 "Invalid Signature attribute length %u in class file %s",
2166 method_attribute_length, CHECK_(nullHandle));
2167 }
2168 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
2169 generic_signature_index = cfs->get_u2_fast();
2170 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2171 runtime_visible_annotations_length = method_attribute_length;
2172 runtime_visible_annotations = cfs->get_u1_buffer();
2173 assert(runtime_visible_annotations != NULL, "null visible annotations");
2174 parse_annotations(runtime_visible_annotations,
2175 runtime_visible_annotations_length, cp, &parsed_annotations,
2176 CHECK_(nullHandle));
2177 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2178 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2179 runtime_invisible_annotations_length = method_attribute_length;
2180 runtime_invisible_annotations = cfs->get_u1_buffer();
2181 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2182 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
2183 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2184 runtime_visible_parameter_annotations_length = method_attribute_length;
2185 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2186 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2187 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2188 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2189 runtime_invisible_parameter_annotations_length = method_attribute_length;
2190 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2191 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2192 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
2193 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2194 annotation_default_length = method_attribute_length;
2195 annotation_default = cfs->get_u1_buffer();
2196 assert(annotation_default != NULL, "null annotation default");
2197 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2198 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2199 runtime_visible_type_annotations_length = method_attribute_length;
2200 runtime_visible_type_annotations = cfs->get_u1_buffer();
2201 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2202 // No need for the VM to parse Type annotations
2203 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
2204 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2205 runtime_invisible_type_annotations_length = method_attribute_length;
2206 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2207 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2208 cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK_(nullHandle));
2209 } else {
2210 // Skip unknown attributes
2211 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2212 }
2213 } else {
2214 // Skip unknown attributes
2215 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2216 }
2217 }
2219 if (linenumber_table != NULL) {
2220 linenumber_table->write_terminator();
2221 linenumber_table_length = linenumber_table->position();
2222 }
2224 // Make sure there's at least one Code attribute in non-native/non-abstract method
2225 if (_need_verify) {
2226 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2227 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2228 }
2230 // All sizing information for a Method* is finally available, now create it
2231 Method* m = Method::allocate(
2232 loader_data, code_length, access_flags, linenumber_table_length,
2233 total_lvt_length, exception_table_length, checked_exceptions_length,
2234 generic_signature_index, ConstMethod::NORMAL, CHECK_(nullHandle));
2236 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2238 // Fill in information from fixed part (access_flags already set)
2239 m->set_constants(cp());
2240 m->set_name_index(name_index);
2241 m->set_signature_index(signature_index);
2242 #ifdef CC_INTERP
2243 // hmm is there a gc issue here??
2244 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2245 m->set_result_index(rtf.type());
2246 #endif
2248 if (args_size >= 0) {
2249 m->set_size_of_parameters(args_size);
2250 } else {
2251 m->compute_size_of_parameters(THREAD);
2252 }
2253 #ifdef ASSERT
2254 if (args_size >= 0) {
2255 m->compute_size_of_parameters(THREAD);
2256 assert(args_size == m->size_of_parameters(), "");
2257 }
2258 #endif
2260 // Fill in code attribute information
2261 m->set_max_stack(max_stack);
2262 m->set_max_locals(max_locals);
2263 m->constMethod()->set_stackmap_data(stackmap_data);
2265 // Copy byte codes
2266 m->set_code(code_start);
2268 // Copy line number table
2269 if (linenumber_table != NULL) {
2270 memcpy(m->compressed_linenumber_table(),
2271 linenumber_table->buffer(), linenumber_table_length);
2272 }
2274 // Copy exception table
2275 if (exception_table_length > 0) {
2276 int size =
2277 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2278 copy_u2_with_conversion((u2*) m->exception_table_start(),
2279 exception_table_start, size);
2280 }
2282 // Copy checked exceptions
2283 if (checked_exceptions_length > 0) {
2284 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2285 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2286 }
2288 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2289 *
2290 * Rules for LVT's and LVTT's are:
2291 * - There can be any number of LVT's and LVTT's.
2292 * - If there are n LVT's, it is the same as if there was just
2293 * one LVT containing all the entries from the n LVT's.
2294 * - There may be no more than one LVT entry per local variable.
2295 * Two LVT entries are 'equal' if these fields are the same:
2296 * start_pc, length, name, slot
2297 * - There may be no more than one LVTT entry per each LVT entry.
2298 * Each LVTT entry has to match some LVT entry.
2299 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2300 */
2301 if (total_lvt_length > 0) {
2302 int tbl_no, idx;
2304 promoted_flags->set_has_localvariable_table();
2306 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2307 initialize_hashtable(lvt_Hash);
2309 // To fill LocalVariableTable in
2310 Classfile_LVT_Element* cf_lvt;
2311 LocalVariableTableElement* lvt = m->localvariable_table_start();
2313 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2314 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2315 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2316 copy_lvt_element(&cf_lvt[idx], lvt);
2317 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2318 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2319 && _need_verify
2320 && _major_version >= JAVA_1_5_VERSION ) {
2321 clear_hashtable(lvt_Hash);
2322 classfile_parse_error("Duplicated LocalVariableTable attribute "
2323 "entry for '%s' in class file %s",
2324 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2325 CHECK_(nullHandle));
2326 }
2327 }
2328 }
2330 // To merge LocalVariableTable and LocalVariableTypeTable
2331 Classfile_LVT_Element* cf_lvtt;
2332 LocalVariableTableElement lvtt_elem;
2334 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2335 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2336 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2337 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2338 int index = hash(&lvtt_elem);
2339 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2340 if (entry == NULL) {
2341 if (_need_verify) {
2342 clear_hashtable(lvt_Hash);
2343 classfile_parse_error("LVTT entry for '%s' in class file %s "
2344 "does not match any LVT entry",
2345 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2346 CHECK_(nullHandle));
2347 }
2348 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2349 clear_hashtable(lvt_Hash);
2350 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2351 "entry for '%s' in class file %s",
2352 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2353 CHECK_(nullHandle));
2354 } else {
2355 // to add generic signatures into LocalVariableTable
2356 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2357 }
2358 }
2359 }
2360 clear_hashtable(lvt_Hash);
2361 }
2363 if (parsed_annotations.has_any_annotations())
2364 parsed_annotations.apply_to(m);
2365 *method_annotations = assemble_annotations(loader_data,
2366 runtime_visible_annotations,
2367 runtime_visible_annotations_length,
2368 runtime_invisible_annotations,
2369 runtime_invisible_annotations_length,
2370 CHECK_(nullHandle));
2371 *method_parameter_annotations = assemble_annotations(loader_data,
2372 runtime_visible_parameter_annotations,
2373 runtime_visible_parameter_annotations_length,
2374 runtime_invisible_parameter_annotations,
2375 runtime_invisible_parameter_annotations_length,
2376 CHECK_(nullHandle));
2377 *method_default_annotations = assemble_annotations(loader_data,
2378 annotation_default,
2379 annotation_default_length,
2380 NULL,
2381 0,
2382 CHECK_(nullHandle));
2383 *method_type_annotations = assemble_annotations(loader_data,
2384 runtime_visible_type_annotations,
2385 runtime_visible_type_annotations_length,
2386 runtime_invisible_type_annotations,
2387 runtime_invisible_type_annotations_length,
2388 CHECK_(nullHandle));
2390 if (name == vmSymbols::finalize_method_name() &&
2391 signature == vmSymbols::void_method_signature()) {
2392 if (m->is_empty_method()) {
2393 _has_empty_finalizer = true;
2394 } else {
2395 _has_finalizer = true;
2396 }
2397 }
2398 if (name == vmSymbols::object_initializer_name() &&
2399 signature == vmSymbols::void_method_signature() &&
2400 m->is_vanilla_constructor()) {
2401 _has_vanilla_constructor = true;
2402 }
2404 return m;
2405 }
2408 // The promoted_flags parameter is used to pass relevant access_flags
2409 // from the methods back up to the containing klass. These flag values
2410 // are added to klass's access_flags.
2412 Array<Method*>* ClassFileParser::parse_methods(ClassLoaderData* loader_data,
2413 constantPoolHandle cp,
2414 bool is_interface,
2415 AccessFlags* promoted_flags,
2416 bool* has_final_method,
2417 Array<AnnotationArray*>** methods_annotations,
2418 Array<AnnotationArray*>** methods_parameter_annotations,
2419 Array<AnnotationArray*>** methods_default_annotations,
2420 Array<AnnotationArray*>** methods_type_annotations,
2421 bool* has_default_methods,
2422 TRAPS) {
2423 ClassFileStream* cfs = stream();
2424 AnnotationArray* method_annotations = NULL;
2425 AnnotationArray* method_parameter_annotations = NULL;
2426 AnnotationArray* method_default_annotations = NULL;
2427 AnnotationArray* method_type_annotations = NULL;
2428 cfs->guarantee_more(2, CHECK_NULL); // length
2429 u2 length = cfs->get_u2_fast();
2430 if (length == 0) {
2431 return Universe::the_empty_method_array();
2432 } else {
2433 // FIXME: Handle leaks at later failures.
2434 Array<Method*>* methods = MetadataFactory::new_array<Method*>(loader_data, length, NULL, CHECK_NULL);
2436 HandleMark hm(THREAD);
2437 for (int index = 0; index < length; index++) {
2438 methodHandle method = parse_method(loader_data,
2439 cp, is_interface,
2440 promoted_flags,
2441 &method_annotations,
2442 &method_parameter_annotations,
2443 &method_default_annotations,
2444 &method_type_annotations,
2445 CHECK_NULL);
2447 if (method->is_final()) {
2448 *has_final_method = true;
2449 }
2450 if (is_interface && !method->is_abstract() && !method->is_static()) {
2451 // default method
2452 *has_default_methods = true;
2453 }
2454 methods->at_put(index, method());
2455 if (*methods_annotations == NULL) {
2456 *methods_annotations =
2457 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2458 }
2459 (*methods_annotations)->at_put(index, method_annotations);
2460 if (*methods_parameter_annotations == NULL) {
2461 *methods_parameter_annotations =
2462 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2463 }
2464 (*methods_parameter_annotations)->at_put(index, method_parameter_annotations);
2465 if (*methods_default_annotations == NULL) {
2466 *methods_default_annotations =
2467 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2468 }
2469 (*methods_default_annotations)->at_put(index, method_default_annotations);
2470 if (*methods_type_annotations == NULL) {
2471 *methods_type_annotations =
2472 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2473 }
2474 (*methods_type_annotations)->at_put(index, method_type_annotations);
2475 }
2477 if (_need_verify && length > 1) {
2478 // Check duplicated methods
2479 ResourceMark rm(THREAD);
2480 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2481 THREAD, NameSigHash*, HASH_ROW_SIZE);
2482 initialize_hashtable(names_and_sigs);
2483 bool dup = false;
2484 {
2485 debug_only(No_Safepoint_Verifier nsv;)
2486 for (int i = 0; i < length; i++) {
2487 Method* m = methods->at(i);
2488 // If no duplicates, add name/signature in hashtable names_and_sigs.
2489 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2490 dup = true;
2491 break;
2492 }
2493 }
2494 }
2495 if (dup) {
2496 classfile_parse_error("Duplicate method name&signature in class file %s",
2497 CHECK_NULL);
2498 }
2499 }
2500 return methods;
2501 }
2502 }
2505 Array<int>* ClassFileParser::sort_methods(ClassLoaderData* loader_data,
2506 Array<Method*>* methods,
2507 Array<AnnotationArray*>* methods_annotations,
2508 Array<AnnotationArray*>* methods_parameter_annotations,
2509 Array<AnnotationArray*>* methods_default_annotations,
2510 Array<AnnotationArray*>* methods_type_annotations,
2511 TRAPS) {
2512 int length = methods->length();
2513 // If JVMTI original method ordering or sharing is enabled we have to
2514 // remember the original class file ordering.
2515 // We temporarily use the vtable_index field in the Method* to store the
2516 // class file index, so we can read in after calling qsort.
2517 // Put the method ordering in the shared archive.
2518 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2519 for (int index = 0; index < length; index++) {
2520 Method* m = methods->at(index);
2521 assert(!m->valid_vtable_index(), "vtable index should not be set");
2522 m->set_vtable_index(index);
2523 }
2524 }
2525 // Sort method array by ascending method name (for faster lookups & vtable construction)
2526 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2527 Method::sort_methods(methods, methods_annotations,
2528 methods_parameter_annotations,
2529 methods_default_annotations,
2530 methods_type_annotations);
2532 // If JVMTI original method ordering or sharing is enabled construct int
2533 // array remembering the original ordering
2534 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2535 Array<int>* method_ordering = MetadataFactory::new_array<int>(loader_data, length, CHECK_NULL);
2536 for (int index = 0; index < length; index++) {
2537 Method* m = methods->at(index);
2538 int old_index = m->vtable_index();
2539 assert(old_index >= 0 && old_index < length, "invalid method index");
2540 method_ordering->at_put(index, old_index);
2541 m->set_vtable_index(Method::invalid_vtable_index);
2542 }
2543 return method_ordering;
2544 } else {
2545 return Universe::the_empty_int_array();
2546 }
2547 }
2550 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS) {
2551 ClassFileStream* cfs = stream();
2552 cfs->guarantee_more(2, CHECK); // sourcefile_index
2553 u2 sourcefile_index = cfs->get_u2_fast();
2554 check_property(
2555 valid_cp_range(sourcefile_index, cp->length()) &&
2556 cp->tag_at(sourcefile_index).is_utf8(),
2557 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2558 sourcefile_index, CHECK);
2559 set_class_sourcefile(cp->symbol_at(sourcefile_index));
2560 }
2564 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2565 int length, TRAPS) {
2566 ClassFileStream* cfs = stream();
2567 u1* sde_buffer = cfs->get_u1_buffer();
2568 assert(sde_buffer != NULL, "null sde buffer");
2570 // Don't bother storing it if there is no way to retrieve it
2571 if (JvmtiExport::can_get_source_debug_extension()) {
2572 assert((length+1) > length, "Overflow checking");
2573 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2574 for (int i = 0; i < length; i++) {
2575 sde[i] = sde_buffer[i];
2576 }
2577 sde[length] = '\0';
2578 set_class_sde_buffer((char*)sde, length);
2579 }
2580 // Got utf8 string, set stream position forward
2581 cfs->skip_u1(length, CHECK);
2582 }
2585 // Inner classes can be static, private or protected (classic VM does this)
2586 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2588 // Return number of classes in the inner classes attribute table
2589 u2 ClassFileParser::parse_classfile_inner_classes_attribute(ClassLoaderData* loader_data,
2590 u1* inner_classes_attribute_start,
2591 bool parsed_enclosingmethod_attribute,
2592 u2 enclosing_method_class_index,
2593 u2 enclosing_method_method_index,
2594 constantPoolHandle cp,
2595 TRAPS) {
2596 ClassFileStream* cfs = stream();
2597 u1* current_mark = cfs->current();
2598 u2 length = 0;
2599 if (inner_classes_attribute_start != NULL) {
2600 cfs->set_current(inner_classes_attribute_start);
2601 cfs->guarantee_more(2, CHECK_0); // length
2602 length = cfs->get_u2_fast();
2603 }
2605 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2606 // method data:
2607 // [inner_class_info_index,
2608 // outer_class_info_index,
2609 // inner_name_index,
2610 // inner_class_access_flags,
2611 // ...
2612 // enclosing_method_class_index,
2613 // enclosing_method_method_index]
2614 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2615 // FIXME: Will leak on exceptions.
2616 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(loader_data, size, CHECK_0);
2617 int index = 0;
2618 int cp_size = cp->length();
2619 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2620 for (int n = 0; n < length; n++) {
2621 // Inner class index
2622 u2 inner_class_info_index = cfs->get_u2_fast();
2623 check_property(
2624 inner_class_info_index == 0 ||
2625 (valid_cp_range(inner_class_info_index, cp_size) &&
2626 is_klass_reference(cp, inner_class_info_index)),
2627 "inner_class_info_index %u has bad constant type in class file %s",
2628 inner_class_info_index, CHECK_0);
2629 // Outer class index
2630 u2 outer_class_info_index = cfs->get_u2_fast();
2631 check_property(
2632 outer_class_info_index == 0 ||
2633 (valid_cp_range(outer_class_info_index, cp_size) &&
2634 is_klass_reference(cp, outer_class_info_index)),
2635 "outer_class_info_index %u has bad constant type in class file %s",
2636 outer_class_info_index, CHECK_0);
2637 // Inner class name
2638 u2 inner_name_index = cfs->get_u2_fast();
2639 check_property(
2640 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2641 cp->tag_at(inner_name_index).is_utf8()),
2642 "inner_name_index %u has bad constant type in class file %s",
2643 inner_name_index, CHECK_0);
2644 if (_need_verify) {
2645 guarantee_property(inner_class_info_index != outer_class_info_index,
2646 "Class is both outer and inner class in class file %s", CHECK_0);
2647 }
2648 // Access flags
2649 AccessFlags inner_access_flags;
2650 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2651 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2652 // Set abstract bit for old class files for backward compatibility
2653 flags |= JVM_ACC_ABSTRACT;
2654 }
2655 verify_legal_class_modifiers(flags, CHECK_0);
2656 inner_access_flags.set_flags(flags);
2658 inner_classes->at_put(index++, inner_class_info_index);
2659 inner_classes->at_put(index++, outer_class_info_index);
2660 inner_classes->at_put(index++, inner_name_index);
2661 inner_classes->at_put(index++, inner_access_flags.as_short());
2662 }
2664 // 4347400: make sure there's no duplicate entry in the classes array
2665 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2666 for(int i = 0; i < length * 4; i += 4) {
2667 for(int j = i + 4; j < length * 4; j += 4) {
2668 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2669 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2670 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2671 inner_classes->at(i+3) != inner_classes->at(j+3)),
2672 "Duplicate entry in InnerClasses in class file %s",
2673 CHECK_0);
2674 }
2675 }
2676 }
2678 // Set EnclosingMethod class and method indexes.
2679 if (parsed_enclosingmethod_attribute) {
2680 inner_classes->at_put(index++, enclosing_method_class_index);
2681 inner_classes->at_put(index++, enclosing_method_method_index);
2682 }
2683 assert(index == size, "wrong size");
2685 // Update InstanceKlass with inner class info.
2686 set_class_inner_classes(inner_classes);
2688 // Restore buffer's current position.
2689 cfs->set_current(current_mark);
2691 return length;
2692 }
2694 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS) {
2695 set_class_synthetic_flag(true);
2696 }
2698 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS) {
2699 ClassFileStream* cfs = stream();
2700 u2 signature_index = cfs->get_u2(CHECK);
2701 check_property(
2702 valid_cp_range(signature_index, cp->length()) &&
2703 cp->tag_at(signature_index).is_utf8(),
2704 "Invalid constant pool index %u in Signature attribute in class file %s",
2705 signature_index, CHECK);
2706 set_class_generic_signature(cp->symbol_at(signature_index));
2707 }
2709 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(ClassLoaderData* loader_data,
2710 constantPoolHandle cp,
2711 u4 attribute_byte_length, TRAPS) {
2712 ClassFileStream* cfs = stream();
2713 u1* current_start = cfs->current();
2715 cfs->guarantee_more(2, CHECK); // length
2716 int attribute_array_length = cfs->get_u2_fast();
2718 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2719 "Short length on BootstrapMethods in class file %s",
2720 CHECK);
2722 // The attribute contains a counted array of counted tuples of shorts,
2723 // represending bootstrap specifiers:
2724 // length*{bootstrap_method_index, argument_count*{argument_index}}
2725 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2726 // operand_count = number of shorts in attr, except for leading length
2728 // The attribute is copied into a short[] array.
2729 // The array begins with a series of short[2] pairs, one for each tuple.
2730 int index_size = (attribute_array_length * 2);
2732 Array<u2>* operands = MetadataFactory::new_array<u2>(loader_data, index_size + operand_count, CHECK);
2734 int operand_fill_index = index_size;
2735 int cp_size = cp->length();
2737 for (int n = 0; n < attribute_array_length; n++) {
2738 // Store a 32-bit offset into the header of the operand array.
2739 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2741 // Read a bootstrap specifier.
2742 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2743 u2 bootstrap_method_index = cfs->get_u2_fast();
2744 u2 argument_count = cfs->get_u2_fast();
2745 check_property(
2746 valid_cp_range(bootstrap_method_index, cp_size) &&
2747 cp->tag_at(bootstrap_method_index).is_method_handle(),
2748 "bootstrap_method_index %u has bad constant type in class file %s",
2749 bootstrap_method_index,
2750 CHECK);
2751 operands->at_put(operand_fill_index++, bootstrap_method_index);
2752 operands->at_put(operand_fill_index++, argument_count);
2754 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2755 for (int j = 0; j < argument_count; j++) {
2756 u2 argument_index = cfs->get_u2_fast();
2757 check_property(
2758 valid_cp_range(argument_index, cp_size) &&
2759 cp->tag_at(argument_index).is_loadable_constant(),
2760 "argument_index %u has bad constant type in class file %s",
2761 argument_index,
2762 CHECK);
2763 operands->at_put(operand_fill_index++, argument_index);
2764 }
2765 }
2767 assert(operand_fill_index == operands->length(), "exact fill");
2768 assert(ConstantPool::operand_array_length(operands) == attribute_array_length, "correct decode");
2770 u1* current_end = cfs->current();
2771 guarantee_property(current_end == current_start + attribute_byte_length,
2772 "Bad length on BootstrapMethods in class file %s",
2773 CHECK);
2775 cp->set_operands(operands);
2776 }
2778 void ClassFileParser::parse_classfile_attributes(ClassLoaderData* loader_data,
2779 constantPoolHandle cp,
2780 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2781 TRAPS) {
2782 ClassFileStream* cfs = stream();
2783 // Set inner classes attribute to default sentinel
2784 set_class_inner_classes(Universe::the_empty_short_array());
2785 cfs->guarantee_more(2, CHECK); // attributes_count
2786 u2 attributes_count = cfs->get_u2_fast();
2787 bool parsed_sourcefile_attribute = false;
2788 bool parsed_innerclasses_attribute = false;
2789 bool parsed_enclosingmethod_attribute = false;
2790 bool parsed_bootstrap_methods_attribute = false;
2791 u1* runtime_visible_annotations = NULL;
2792 int runtime_visible_annotations_length = 0;
2793 u1* runtime_invisible_annotations = NULL;
2794 int runtime_invisible_annotations_length = 0;
2795 u1* runtime_visible_type_annotations = NULL;
2796 int runtime_visible_type_annotations_length = 0;
2797 u1* runtime_invisible_type_annotations = NULL;
2798 int runtime_invisible_type_annotations_length = 0;
2799 u1* inner_classes_attribute_start = NULL;
2800 u4 inner_classes_attribute_length = 0;
2801 u2 enclosing_method_class_index = 0;
2802 u2 enclosing_method_method_index = 0;
2803 // Iterate over attributes
2804 while (attributes_count--) {
2805 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2806 u2 attribute_name_index = cfs->get_u2_fast();
2807 u4 attribute_length = cfs->get_u4_fast();
2808 check_property(
2809 valid_cp_range(attribute_name_index, cp->length()) &&
2810 cp->tag_at(attribute_name_index).is_utf8(),
2811 "Attribute name has bad constant pool index %u in class file %s",
2812 attribute_name_index, CHECK);
2813 Symbol* tag = cp->symbol_at(attribute_name_index);
2814 if (tag == vmSymbols::tag_source_file()) {
2815 // Check for SourceFile tag
2816 if (_need_verify) {
2817 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2818 }
2819 if (parsed_sourcefile_attribute) {
2820 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2821 } else {
2822 parsed_sourcefile_attribute = true;
2823 }
2824 parse_classfile_sourcefile_attribute(cp, CHECK);
2825 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2826 // Check for SourceDebugExtension tag
2827 parse_classfile_source_debug_extension_attribute(cp, (int)attribute_length, CHECK);
2828 } else if (tag == vmSymbols::tag_inner_classes()) {
2829 // Check for InnerClasses tag
2830 if (parsed_innerclasses_attribute) {
2831 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2832 } else {
2833 parsed_innerclasses_attribute = true;
2834 }
2835 inner_classes_attribute_start = cfs->get_u1_buffer();
2836 inner_classes_attribute_length = attribute_length;
2837 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2838 } else if (tag == vmSymbols::tag_synthetic()) {
2839 // Check for Synthetic tag
2840 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2841 if (attribute_length != 0) {
2842 classfile_parse_error(
2843 "Invalid Synthetic classfile attribute length %u in class file %s",
2844 attribute_length, CHECK);
2845 }
2846 parse_classfile_synthetic_attribute(cp, CHECK);
2847 } else if (tag == vmSymbols::tag_deprecated()) {
2848 // Check for Deprecatd tag - 4276120
2849 if (attribute_length != 0) {
2850 classfile_parse_error(
2851 "Invalid Deprecated classfile attribute length %u in class file %s",
2852 attribute_length, CHECK);
2853 }
2854 } else if (_major_version >= JAVA_1_5_VERSION) {
2855 if (tag == vmSymbols::tag_signature()) {
2856 if (attribute_length != 2) {
2857 classfile_parse_error(
2858 "Wrong Signature attribute length %u in class file %s",
2859 attribute_length, CHECK);
2860 }
2861 parse_classfile_signature_attribute(cp, CHECK);
2862 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2863 runtime_visible_annotations_length = attribute_length;
2864 runtime_visible_annotations = cfs->get_u1_buffer();
2865 assert(runtime_visible_annotations != NULL, "null visible annotations");
2866 parse_annotations(runtime_visible_annotations,
2867 runtime_visible_annotations_length,
2868 cp,
2869 parsed_annotations,
2870 CHECK);
2871 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2872 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2873 runtime_invisible_annotations_length = attribute_length;
2874 runtime_invisible_annotations = cfs->get_u1_buffer();
2875 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2876 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2877 } else if (tag == vmSymbols::tag_enclosing_method()) {
2878 if (parsed_enclosingmethod_attribute) {
2879 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2880 } else {
2881 parsed_enclosingmethod_attribute = true;
2882 }
2883 cfs->guarantee_more(4, CHECK); // class_index, method_index
2884 enclosing_method_class_index = cfs->get_u2_fast();
2885 enclosing_method_method_index = cfs->get_u2_fast();
2886 if (enclosing_method_class_index == 0) {
2887 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2888 }
2889 // Validate the constant pool indices and types
2890 if (!cp->is_within_bounds(enclosing_method_class_index) ||
2891 !is_klass_reference(cp, enclosing_method_class_index)) {
2892 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2893 }
2894 if (enclosing_method_method_index != 0 &&
2895 (!cp->is_within_bounds(enclosing_method_method_index) ||
2896 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2897 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2898 }
2899 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2900 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2901 if (parsed_bootstrap_methods_attribute)
2902 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2903 parsed_bootstrap_methods_attribute = true;
2904 parse_classfile_bootstrap_methods_attribute(loader_data, cp, attribute_length, CHECK);
2905 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
2906 runtime_visible_type_annotations_length = attribute_length;
2907 runtime_visible_type_annotations = cfs->get_u1_buffer();
2908 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2909 // No need for the VM to parse Type annotations
2910 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
2911 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
2912 runtime_invisible_type_annotations_length = attribute_length;
2913 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2914 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2915 cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK);
2916 } else {
2917 // Unknown attribute
2918 cfs->skip_u1(attribute_length, CHECK);
2919 }
2920 } else {
2921 // Unknown attribute
2922 cfs->skip_u1(attribute_length, CHECK);
2923 }
2924 }
2925 AnnotationArray* annotations = assemble_annotations(loader_data,
2926 runtime_visible_annotations,
2927 runtime_visible_annotations_length,
2928 runtime_invisible_annotations,
2929 runtime_invisible_annotations_length,
2930 CHECK);
2931 set_class_annotations(annotations);
2932 AnnotationArray* type_annotations = assemble_annotations(loader_data,
2933 runtime_visible_type_annotations,
2934 runtime_visible_type_annotations_length,
2935 runtime_invisible_type_annotations,
2936 runtime_invisible_type_annotations_length,
2937 CHECK);
2938 set_class_type_annotations(type_annotations);
2940 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
2941 u2 num_of_classes = parse_classfile_inner_classes_attribute(
2942 loader_data,
2943 inner_classes_attribute_start,
2944 parsed_innerclasses_attribute,
2945 enclosing_method_class_index,
2946 enclosing_method_method_index,
2947 cp, CHECK);
2948 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
2949 guarantee_property(
2950 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2951 "Wrong InnerClasses attribute length in class file %s", CHECK);
2952 }
2953 }
2955 if (_max_bootstrap_specifier_index >= 0) {
2956 guarantee_property(parsed_bootstrap_methods_attribute,
2957 "Missing BootstrapMethods attribute in class file %s", CHECK);
2958 }
2959 }
2961 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
2962 if (_synthetic_flag)
2963 k->set_is_synthetic();
2964 if (_sourcefile != NULL) {
2965 _sourcefile->increment_refcount();
2966 k->set_source_file_name(_sourcefile);
2967 }
2968 if (_generic_signature != NULL) {
2969 _generic_signature->increment_refcount();
2970 k->set_generic_signature(_generic_signature);
2971 }
2972 if (_sde_buffer != NULL) {
2973 k->set_source_debug_extension(_sde_buffer, _sde_length);
2974 }
2975 k->set_inner_classes(_inner_classes);
2976 if (_annotations != NULL) {
2977 k->annotations()->set_class_annotations(_annotations);
2978 }
2979 }
2981 AnnotationArray* ClassFileParser::assemble_annotations(ClassLoaderData* loader_data,
2982 u1* runtime_visible_annotations,
2983 int runtime_visible_annotations_length,
2984 u1* runtime_invisible_annotations,
2985 int runtime_invisible_annotations_length, TRAPS) {
2986 AnnotationArray* annotations = NULL;
2987 if (runtime_visible_annotations != NULL ||
2988 runtime_invisible_annotations != NULL) {
2989 annotations = MetadataFactory::new_array<u1>(loader_data,
2990 runtime_visible_annotations_length +
2991 runtime_invisible_annotations_length,
2992 CHECK_(annotations));
2993 if (runtime_visible_annotations != NULL) {
2994 for (int i = 0; i < runtime_visible_annotations_length; i++) {
2995 annotations->at_put(i, runtime_visible_annotations[i]);
2996 }
2997 }
2998 if (runtime_invisible_annotations != NULL) {
2999 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3000 int append = runtime_visible_annotations_length+i;
3001 annotations->at_put(append, runtime_invisible_annotations[i]);
3002 }
3003 }
3004 }
3005 return annotations;
3006 }
3009 #ifndef PRODUCT
3010 static void parseAndPrintGenericSignatures(
3011 instanceKlassHandle this_klass, TRAPS) {
3012 assert(ParseAllGenericSignatures == true, "Shouldn't call otherwise");
3013 ResourceMark rm;
3015 if (this_klass->generic_signature() != NULL) {
3016 using namespace generic;
3017 ClassDescriptor* spec = ClassDescriptor::parse_generic_signature(this_klass(), CHECK);
3019 tty->print_cr("Parsing %s", this_klass->generic_signature()->as_C_string());
3020 spec->print_on(tty);
3022 for (int i = 0; i < this_klass->methods()->length(); ++i) {
3023 Method* m = this_klass->methods()->at(i);
3024 MethodDescriptor* method_spec = MethodDescriptor::parse_generic_signature(m, spec);
3025 Symbol* sig = m->generic_signature();
3026 if (sig == NULL) {
3027 sig = m->signature();
3028 }
3029 tty->print_cr("Parsing %s", sig->as_C_string());
3030 method_spec->print_on(tty);
3031 }
3032 }
3033 }
3034 #endif // ndef PRODUCT
3037 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
3038 ClassLoaderData* loader_data,
3039 Handle protection_domain,
3040 KlassHandle host_klass,
3041 GrowableArray<Handle>* cp_patches,
3042 TempNewSymbol& parsed_name,
3043 bool verify,
3044 TRAPS) {
3045 // When a retransformable agent is attached, JVMTI caches the
3046 // class bytes that existed before the first retransformation.
3047 // If RedefineClasses() was used before the retransformable
3048 // agent attached, then the cached class bytes may not be the
3049 // original class bytes.
3050 unsigned char *cached_class_file_bytes = NULL;
3051 jint cached_class_file_length;
3052 Handle class_loader(THREAD, loader_data->class_loader());
3053 bool has_default_methods = false;
3054 ResourceMark rm(THREAD);
3056 ClassFileStream* cfs = stream();
3057 // Timing
3058 assert(THREAD->is_Java_thread(), "must be a JavaThread");
3059 JavaThread* jt = (JavaThread*) THREAD;
3061 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
3062 ClassLoader::perf_class_parse_selftime(),
3063 NULL,
3064 jt->get_thread_stat()->perf_recursion_counts_addr(),
3065 jt->get_thread_stat()->perf_timers_addr(),
3066 PerfClassTraceTime::PARSE_CLASS);
3068 init_parsed_class_attributes();
3070 if (JvmtiExport::should_post_class_file_load_hook()) {
3071 // Get the cached class file bytes (if any) from the class that
3072 // is being redefined or retransformed. We use jvmti_thread_state()
3073 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
3074 // a JvmtiThreadState any earlier than necessary. This will help
3075 // avoid the bug described by 7126851.
3076 JvmtiThreadState *state = jt->jvmti_thread_state();
3077 if (state != NULL) {
3078 KlassHandle *h_class_being_redefined =
3079 state->get_class_being_redefined();
3080 if (h_class_being_redefined != NULL) {
3081 instanceKlassHandle ikh_class_being_redefined =
3082 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
3083 cached_class_file_bytes =
3084 ikh_class_being_redefined->get_cached_class_file_bytes();
3085 cached_class_file_length =
3086 ikh_class_being_redefined->get_cached_class_file_len();
3087 }
3088 }
3090 unsigned char* ptr = cfs->buffer();
3091 unsigned char* end_ptr = cfs->buffer() + cfs->length();
3093 JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3094 &ptr, &end_ptr,
3095 &cached_class_file_bytes,
3096 &cached_class_file_length);
3098 if (ptr != cfs->buffer()) {
3099 // JVMTI agent has modified class file data.
3100 // Set new class file stream using JVMTI agent modified
3101 // class file data.
3102 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3103 set_stream(cfs);
3104 }
3105 }
3107 _host_klass = host_klass;
3108 _cp_patches = cp_patches;
3110 instanceKlassHandle nullHandle;
3112 // Figure out whether we can skip format checking (matching classic VM behavior)
3113 _need_verify = Verifier::should_verify_for(class_loader(), verify);
3115 // Set the verify flag in stream
3116 cfs->set_verify(_need_verify);
3118 // Save the class file name for easier error message printing.
3119 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3121 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
3122 // Magic value
3123 u4 magic = cfs->get_u4_fast();
3124 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3125 "Incompatible magic value %u in class file %s",
3126 magic, CHECK_(nullHandle));
3128 // Version numbers
3129 u2 minor_version = cfs->get_u2_fast();
3130 u2 major_version = cfs->get_u2_fast();
3132 // Check version numbers - we check this even with verifier off
3133 if (!is_supported_version(major_version, minor_version)) {
3134 if (name == NULL) {
3135 Exceptions::fthrow(
3136 THREAD_AND_LOCATION,
3137 vmSymbols::java_lang_UnsupportedClassVersionError(),
3138 "Unsupported major.minor version %u.%u",
3139 major_version,
3140 minor_version);
3141 } else {
3142 ResourceMark rm(THREAD);
3143 Exceptions::fthrow(
3144 THREAD_AND_LOCATION,
3145 vmSymbols::java_lang_UnsupportedClassVersionError(),
3146 "%s : Unsupported major.minor version %u.%u",
3147 name->as_C_string(),
3148 major_version,
3149 minor_version);
3150 }
3151 return nullHandle;
3152 }
3154 _major_version = major_version;
3155 _minor_version = minor_version;
3158 // Check if verification needs to be relaxed for this class file
3159 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3160 _relax_verify = Verifier::relax_verify_for(class_loader());
3162 // Constant pool
3163 constantPoolHandle cp = parse_constant_pool(loader_data, CHECK_(nullHandle));
3164 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
3166 int cp_size = cp->length();
3168 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3170 // Access flags
3171 AccessFlags access_flags;
3172 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3174 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3175 // Set abstract bit for old class files for backward compatibility
3176 flags |= JVM_ACC_ABSTRACT;
3177 }
3178 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3179 access_flags.set_flags(flags);
3181 // This class and superclass
3182 instanceKlassHandle super_klass;
3183 u2 this_class_index = cfs->get_u2_fast();
3184 check_property(
3185 valid_cp_range(this_class_index, cp_size) &&
3186 cp->tag_at(this_class_index).is_unresolved_klass(),
3187 "Invalid this class index %u in constant pool in class file %s",
3188 this_class_index, CHECK_(nullHandle));
3190 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
3191 assert(class_name != NULL, "class_name can't be null");
3193 // It's important to set parsed_name *before* resolving the super class.
3194 // (it's used for cleanup by the caller if parsing fails)
3195 parsed_name = class_name;
3196 // parsed_name is returned and can be used if there's an error, so add to
3197 // its reference count. Caller will decrement the refcount.
3198 parsed_name->increment_refcount();
3200 // Update _class_name which could be null previously to be class_name
3201 _class_name = class_name;
3203 // Don't need to check whether this class name is legal or not.
3204 // It has been checked when constant pool is parsed.
3205 // However, make sure it is not an array type.
3206 if (_need_verify) {
3207 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3208 "Bad class name in class file %s",
3209 CHECK_(nullHandle));
3210 }
3212 Klass* preserve_this_klass; // for storing result across HandleMark
3214 // release all handles when parsing is done
3215 { HandleMark hm(THREAD);
3217 // Checks if name in class file matches requested name
3218 if (name != NULL && class_name != name) {
3219 ResourceMark rm(THREAD);
3220 Exceptions::fthrow(
3221 THREAD_AND_LOCATION,
3222 vmSymbols::java_lang_NoClassDefFoundError(),
3223 "%s (wrong name: %s)",
3224 name->as_C_string(),
3225 class_name->as_C_string()
3226 );
3227 return nullHandle;
3228 }
3230 if (TraceClassLoadingPreorder) {
3231 tty->print("[Loading %s", name->as_klass_external_name());
3232 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3233 tty->print_cr("]");
3234 }
3236 u2 super_class_index = cfs->get_u2_fast();
3237 if (super_class_index == 0) {
3238 check_property(class_name == vmSymbols::java_lang_Object(),
3239 "Invalid superclass index %u in class file %s",
3240 super_class_index,
3241 CHECK_(nullHandle));
3242 } else {
3243 check_property(valid_cp_range(super_class_index, cp_size) &&
3244 is_klass_reference(cp, super_class_index),
3245 "Invalid superclass index %u in class file %s",
3246 super_class_index,
3247 CHECK_(nullHandle));
3248 // The class name should be legal because it is checked when parsing constant pool.
3249 // However, make sure it is not an array type.
3250 bool is_array = false;
3251 if (cp->tag_at(super_class_index).is_klass()) {
3252 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3253 if (_need_verify)
3254 is_array = super_klass->oop_is_array();
3255 } else if (_need_verify) {
3256 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3257 }
3258 if (_need_verify) {
3259 guarantee_property(!is_array,
3260 "Bad superclass name in class file %s", CHECK_(nullHandle));
3261 }
3262 }
3264 // Interfaces
3265 u2 itfs_len = cfs->get_u2_fast();
3266 Array<Klass*>* local_interfaces;
3267 if (itfs_len == 0) {
3268 local_interfaces = Universe::the_empty_klass_array();
3269 } else {
3270 local_interfaces = parse_interfaces(
3271 cp, itfs_len, loader_data, protection_domain, _class_name,
3272 &has_default_methods, CHECK_(nullHandle));
3273 }
3275 u2 java_fields_count = 0;
3276 // Fields (offsets are filled in later)
3277 FieldAllocationCount fac;
3278 Array<AnnotationArray*>* fields_annotations = NULL;
3279 Array<AnnotationArray*>* fields_type_annotations = NULL;
3280 Array<u2>* fields = parse_fields(loader_data, class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
3281 &fields_type_annotations,
3282 &java_fields_count,
3283 CHECK_(nullHandle));
3284 // Methods
3285 bool has_final_method = false;
3286 AccessFlags promoted_flags;
3287 promoted_flags.set_flags(0);
3288 // These need to be oop pointers because they are allocated lazily
3289 // inside parse_methods inside a nested HandleMark
3290 Array<AnnotationArray*>* methods_annotations = NULL;
3291 Array<AnnotationArray*>* methods_parameter_annotations = NULL;
3292 Array<AnnotationArray*>* methods_default_annotations = NULL;
3293 Array<AnnotationArray*>* methods_type_annotations = NULL;
3294 Array<Method*>* methods = parse_methods(loader_data,
3295 cp, access_flags.is_interface(),
3296 &promoted_flags,
3297 &has_final_method,
3298 &methods_annotations,
3299 &methods_parameter_annotations,
3300 &methods_default_annotations,
3301 &methods_type_annotations,
3302 &has_default_methods,
3303 CHECK_(nullHandle));
3305 // Additional attributes
3306 ClassAnnotationCollector parsed_annotations;
3307 parse_classfile_attributes(loader_data, cp, &parsed_annotations, CHECK_(nullHandle));
3309 // Make sure this is the end of class file stream
3310 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3312 // We check super class after class file is parsed and format is checked
3313 if (super_class_index > 0 && super_klass.is_null()) {
3314 Symbol* sk = cp->klass_name_at(super_class_index);
3315 if (access_flags.is_interface()) {
3316 // Before attempting to resolve the superclass, check for class format
3317 // errors not checked yet.
3318 guarantee_property(sk == vmSymbols::java_lang_Object(),
3319 "Interfaces must have java.lang.Object as superclass in class file %s",
3320 CHECK_(nullHandle));
3321 }
3322 Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
3323 class_loader,
3324 protection_domain,
3325 true,
3326 CHECK_(nullHandle));
3328 KlassHandle kh (THREAD, k);
3329 super_klass = instanceKlassHandle(THREAD, kh());
3330 }
3331 if (super_klass.not_null()) {
3333 if (super_klass->has_default_methods()) {
3334 has_default_methods = true;
3335 }
3337 if (super_klass->is_interface()) {
3338 ResourceMark rm(THREAD);
3339 Exceptions::fthrow(
3340 THREAD_AND_LOCATION,
3341 vmSymbols::java_lang_IncompatibleClassChangeError(),
3342 "class %s has interface %s as super class",
3343 class_name->as_klass_external_name(),
3344 super_klass->external_name()
3345 );
3346 return nullHandle;
3347 }
3348 // Make sure super class is not final
3349 if (super_klass->is_final()) {
3350 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3351 }
3352 }
3354 // Compute the transitive list of all unique interfaces implemented by this class
3355 Array<Klass*>* transitive_interfaces = compute_transitive_interfaces(loader_data, super_klass, local_interfaces, CHECK_(nullHandle));
3357 // sort methods
3358 Array<int>* method_ordering = sort_methods(loader_data,
3359 methods,
3360 methods_annotations,
3361 methods_parameter_annotations,
3362 methods_default_annotations,
3363 methods_type_annotations,
3364 CHECK_(nullHandle));
3366 // promote flags from parse_methods() to the klass' flags
3367 access_flags.add_promoted_flags(promoted_flags.as_int());
3369 // Size of Java vtable (in words)
3370 int vtable_size = 0;
3371 int itable_size = 0;
3372 int num_miranda_methods = 0;
3374 GrowableArray<Method*> all_mirandas(20);
3376 klassVtable::compute_vtable_size_and_num_mirandas(
3377 &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
3378 access_flags, class_loader, class_name, local_interfaces,
3379 CHECK_(nullHandle));
3381 // Size of Java itable (in words)
3382 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3384 // Field size and offset computation
3385 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3386 #ifndef PRODUCT
3387 int orig_nonstatic_field_size = 0;
3388 #endif
3389 int static_field_size = 0;
3390 int next_static_oop_offset;
3391 int next_static_double_offset;
3392 int next_static_word_offset;
3393 int next_static_short_offset;
3394 int next_static_byte_offset;
3395 int next_static_type_offset;
3396 int next_nonstatic_oop_offset;
3397 int next_nonstatic_double_offset;
3398 int next_nonstatic_word_offset;
3399 int next_nonstatic_short_offset;
3400 int next_nonstatic_byte_offset;
3401 int next_nonstatic_type_offset;
3402 int first_nonstatic_oop_offset;
3403 int first_nonstatic_field_offset;
3404 int next_nonstatic_field_offset;
3406 // Calculate the starting byte offsets
3407 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3408 next_static_double_offset = next_static_oop_offset +
3409 (fac.count[STATIC_OOP] * heapOopSize);
3410 if ( fac.count[STATIC_DOUBLE] &&
3411 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3412 Universe::field_type_should_be_aligned(T_LONG)) ) {
3413 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3414 }
3416 next_static_word_offset = next_static_double_offset +
3417 (fac.count[STATIC_DOUBLE] * BytesPerLong);
3418 next_static_short_offset = next_static_word_offset +
3419 (fac.count[STATIC_WORD] * BytesPerInt);
3420 next_static_byte_offset = next_static_short_offset +
3421 (fac.count[STATIC_SHORT] * BytesPerShort);
3422 next_static_type_offset = align_size_up((next_static_byte_offset +
3423 fac.count[STATIC_BYTE] ), wordSize );
3424 static_field_size = (next_static_type_offset -
3425 next_static_oop_offset) / wordSize;
3427 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3428 nonstatic_field_size * heapOopSize;
3429 next_nonstatic_field_offset = first_nonstatic_field_offset;
3431 unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3432 unsigned int nonstatic_word_count = fac.count[NONSTATIC_WORD];
3433 unsigned int nonstatic_short_count = fac.count[NONSTATIC_SHORT];
3434 unsigned int nonstatic_byte_count = fac.count[NONSTATIC_BYTE];
3435 unsigned int nonstatic_oop_count = fac.count[NONSTATIC_OOP];
3437 bool super_has_nonstatic_fields =
3438 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3439 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3440 ((nonstatic_double_count + nonstatic_word_count +
3441 nonstatic_short_count + nonstatic_byte_count +
3442 nonstatic_oop_count) != 0);
3445 // Prepare list of oops for oop map generation.
3446 int* nonstatic_oop_offsets;
3447 unsigned int* nonstatic_oop_counts;
3448 unsigned int nonstatic_oop_map_count = 0;
3450 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3451 THREAD, int, nonstatic_oop_count + 1);
3452 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3453 THREAD, unsigned int, nonstatic_oop_count + 1);
3455 first_nonstatic_oop_offset = 0; // will be set for first oop field
3457 #ifndef PRODUCT
3458 if( PrintCompactFieldsSavings ) {
3459 next_nonstatic_double_offset = next_nonstatic_field_offset +
3460 (nonstatic_oop_count * heapOopSize);
3461 if ( nonstatic_double_count > 0 ) {
3462 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3463 }
3464 next_nonstatic_word_offset = next_nonstatic_double_offset +
3465 (nonstatic_double_count * BytesPerLong);
3466 next_nonstatic_short_offset = next_nonstatic_word_offset +
3467 (nonstatic_word_count * BytesPerInt);
3468 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3469 (nonstatic_short_count * BytesPerShort);
3470 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3471 nonstatic_byte_count ), heapOopSize );
3472 orig_nonstatic_field_size = nonstatic_field_size +
3473 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3474 }
3475 #endif
3476 bool compact_fields = CompactFields;
3477 int allocation_style = FieldsAllocationStyle;
3478 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3479 assert(false, "0 <= FieldsAllocationStyle <= 2");
3480 allocation_style = 1; // Optimistic
3481 }
3483 // The next classes have predefined hard-coded fields offsets
3484 // (see in JavaClasses::compute_hard_coded_offsets()).
3485 // Use default fields allocation order for them.
3486 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3487 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3488 class_name == vmSymbols::java_lang_Class() ||
3489 class_name == vmSymbols::java_lang_ClassLoader() ||
3490 class_name == vmSymbols::java_lang_ref_Reference() ||
3491 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3492 class_name == vmSymbols::java_lang_StackTraceElement() ||
3493 class_name == vmSymbols::java_lang_String() ||
3494 class_name == vmSymbols::java_lang_Throwable() ||
3495 class_name == vmSymbols::java_lang_Boolean() ||
3496 class_name == vmSymbols::java_lang_Character() ||
3497 class_name == vmSymbols::java_lang_Float() ||
3498 class_name == vmSymbols::java_lang_Double() ||
3499 class_name == vmSymbols::java_lang_Byte() ||
3500 class_name == vmSymbols::java_lang_Short() ||
3501 class_name == vmSymbols::java_lang_Integer() ||
3502 class_name == vmSymbols::java_lang_Long())) {
3503 allocation_style = 0; // Allocate oops first
3504 compact_fields = false; // Don't compact fields
3505 }
3507 if( allocation_style == 0 ) {
3508 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3509 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3510 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3511 (nonstatic_oop_count * heapOopSize);
3512 } else if( allocation_style == 1 ) {
3513 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3514 next_nonstatic_double_offset = next_nonstatic_field_offset;
3515 } else if( allocation_style == 2 ) {
3516 // Fields allocation: oops fields in super and sub classes are together.
3517 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3518 super_klass->nonstatic_oop_map_size() > 0 ) {
3519 int map_count = super_klass->nonstatic_oop_map_count();
3520 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3521 OopMapBlock* last_map = first_map + map_count - 1;
3522 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3523 if (next_offset == next_nonstatic_field_offset) {
3524 allocation_style = 0; // allocate oops first
3525 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3526 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3527 (nonstatic_oop_count * heapOopSize);
3528 }
3529 }
3530 if( allocation_style == 2 ) {
3531 allocation_style = 1; // allocate oops last
3532 next_nonstatic_double_offset = next_nonstatic_field_offset;
3533 }
3534 } else {
3535 ShouldNotReachHere();
3536 }
3538 int nonstatic_oop_space_count = 0;
3539 int nonstatic_word_space_count = 0;
3540 int nonstatic_short_space_count = 0;
3541 int nonstatic_byte_space_count = 0;
3542 int nonstatic_oop_space_offset;
3543 int nonstatic_word_space_offset;
3544 int nonstatic_short_space_offset;
3545 int nonstatic_byte_space_offset;
3547 if( nonstatic_double_count > 0 ) {
3548 int offset = next_nonstatic_double_offset;
3549 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3550 if( compact_fields && offset != next_nonstatic_double_offset ) {
3551 // Allocate available fields into the gap before double field.
3552 int length = next_nonstatic_double_offset - offset;
3553 assert(length == BytesPerInt, "");
3554 nonstatic_word_space_offset = offset;
3555 if( nonstatic_word_count > 0 ) {
3556 nonstatic_word_count -= 1;
3557 nonstatic_word_space_count = 1; // Only one will fit
3558 length -= BytesPerInt;
3559 offset += BytesPerInt;
3560 }
3561 nonstatic_short_space_offset = offset;
3562 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3563 nonstatic_short_count -= 1;
3564 nonstatic_short_space_count += 1;
3565 length -= BytesPerShort;
3566 offset += BytesPerShort;
3567 }
3568 nonstatic_byte_space_offset = offset;
3569 while( length > 0 && nonstatic_byte_count > 0 ) {
3570 nonstatic_byte_count -= 1;
3571 nonstatic_byte_space_count += 1;
3572 length -= 1;
3573 }
3574 // Allocate oop field in the gap if there are no other fields for that.
3575 nonstatic_oop_space_offset = offset;
3576 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3577 allocation_style != 0 ) { // when oop fields not first
3578 nonstatic_oop_count -= 1;
3579 nonstatic_oop_space_count = 1; // Only one will fit
3580 length -= heapOopSize;
3581 offset += heapOopSize;
3582 }
3583 }
3584 }
3586 next_nonstatic_word_offset = next_nonstatic_double_offset +
3587 (nonstatic_double_count * BytesPerLong);
3588 next_nonstatic_short_offset = next_nonstatic_word_offset +
3589 (nonstatic_word_count * BytesPerInt);
3590 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3591 (nonstatic_short_count * BytesPerShort);
3593 int notaligned_offset;
3594 if( allocation_style == 0 ) {
3595 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3596 } else { // allocation_style == 1
3597 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3598 if( nonstatic_oop_count > 0 ) {
3599 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3600 }
3601 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3602 }
3603 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3604 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3605 - first_nonstatic_field_offset)/heapOopSize);
3607 // Iterate over fields again and compute correct offsets.
3608 // The field allocation type was temporarily stored in the offset slot.
3609 // oop fields are located before non-oop fields (static and non-static).
3610 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3611 int real_offset;
3612 FieldAllocationType atype = (FieldAllocationType) fs.offset();
3613 switch (atype) {
3614 case STATIC_OOP:
3615 real_offset = next_static_oop_offset;
3616 next_static_oop_offset += heapOopSize;
3617 break;
3618 case STATIC_BYTE:
3619 real_offset = next_static_byte_offset;
3620 next_static_byte_offset += 1;
3621 break;
3622 case STATIC_SHORT:
3623 real_offset = next_static_short_offset;
3624 next_static_short_offset += BytesPerShort;
3625 break;
3626 case STATIC_WORD:
3627 real_offset = next_static_word_offset;
3628 next_static_word_offset += BytesPerInt;
3629 break;
3630 case STATIC_DOUBLE:
3631 real_offset = next_static_double_offset;
3632 next_static_double_offset += BytesPerLong;
3633 break;
3634 case NONSTATIC_OOP:
3635 if( nonstatic_oop_space_count > 0 ) {
3636 real_offset = nonstatic_oop_space_offset;
3637 nonstatic_oop_space_offset += heapOopSize;
3638 nonstatic_oop_space_count -= 1;
3639 } else {
3640 real_offset = next_nonstatic_oop_offset;
3641 next_nonstatic_oop_offset += heapOopSize;
3642 }
3643 // Update oop maps
3644 if( nonstatic_oop_map_count > 0 &&
3645 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3646 real_offset -
3647 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3648 heapOopSize ) {
3649 // Extend current oop map
3650 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3651 } else {
3652 // Create new oop map
3653 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3654 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3655 nonstatic_oop_map_count += 1;
3656 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3657 first_nonstatic_oop_offset = real_offset;
3658 }
3659 }
3660 break;
3661 case NONSTATIC_BYTE:
3662 if( nonstatic_byte_space_count > 0 ) {
3663 real_offset = nonstatic_byte_space_offset;
3664 nonstatic_byte_space_offset += 1;
3665 nonstatic_byte_space_count -= 1;
3666 } else {
3667 real_offset = next_nonstatic_byte_offset;
3668 next_nonstatic_byte_offset += 1;
3669 }
3670 break;
3671 case NONSTATIC_SHORT:
3672 if( nonstatic_short_space_count > 0 ) {
3673 real_offset = nonstatic_short_space_offset;
3674 nonstatic_short_space_offset += BytesPerShort;
3675 nonstatic_short_space_count -= 1;
3676 } else {
3677 real_offset = next_nonstatic_short_offset;
3678 next_nonstatic_short_offset += BytesPerShort;
3679 }
3680 break;
3681 case NONSTATIC_WORD:
3682 if( nonstatic_word_space_count > 0 ) {
3683 real_offset = nonstatic_word_space_offset;
3684 nonstatic_word_space_offset += BytesPerInt;
3685 nonstatic_word_space_count -= 1;
3686 } else {
3687 real_offset = next_nonstatic_word_offset;
3688 next_nonstatic_word_offset += BytesPerInt;
3689 }
3690 break;
3691 case NONSTATIC_DOUBLE:
3692 real_offset = next_nonstatic_double_offset;
3693 next_nonstatic_double_offset += BytesPerLong;
3694 break;
3695 default:
3696 ShouldNotReachHere();
3697 }
3698 fs.set_offset(real_offset);
3699 }
3701 // Size of instances
3702 int instance_size;
3704 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3705 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3707 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3709 // Number of non-static oop map blocks allocated at end of klass.
3710 const unsigned int total_oop_map_count =
3711 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3712 first_nonstatic_oop_offset);
3714 // Compute reference type
3715 ReferenceType rt;
3716 if (super_klass() == NULL) {
3717 rt = REF_NONE;
3718 } else {
3719 rt = super_klass->reference_type();
3720 }
3722 // We can now create the basic Klass* for this klass
3723 int total_oop_map_size2 =
3724 InstanceKlass::nonstatic_oop_map_size(total_oop_map_count);
3726 Klass* ik = InstanceKlass::allocate_instance_klass(loader_data,
3727 vtable_size,
3728 itable_size,
3729 static_field_size,
3730 total_oop_map_size2,
3731 rt,
3732 access_flags,
3733 name,
3734 super_klass(),
3735 host_klass,
3736 CHECK_(nullHandle));
3738 // Add all classes to our internal class loader list here,
3739 // including classes in the bootstrap (NULL) class loader.
3740 loader_data->add_class(ik);
3742 instanceKlassHandle this_klass (THREAD, ik);
3744 assert(this_klass->static_field_size() == static_field_size, "sanity");
3745 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3746 "sanity");
3748 // Fill in information already parsed
3749 this_klass->set_should_verify_class(verify);
3750 jint lh = Klass::instance_layout_helper(instance_size, false);
3751 this_klass->set_layout_helper(lh);
3752 assert(this_klass->oop_is_instance(), "layout is correct");
3753 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3754 // Not yet: supers are done below to support the new subtype-checking fields
3755 //this_klass->set_super(super_klass());
3756 this_klass->set_class_loader_data(loader_data);
3757 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3758 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3759 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3760 cp->set_pool_holder(this_klass());
3761 error_handler.set_in_error(false); // turn off error handler for cp
3762 this_klass->set_constants(cp());
3763 this_klass->set_local_interfaces(local_interfaces);
3764 this_klass->set_fields(fields, java_fields_count);
3765 this_klass->set_methods(methods);
3766 if (has_final_method) {
3767 this_klass->set_has_final_method();
3768 }
3769 this_klass->set_method_ordering(method_ordering);
3770 // The InstanceKlass::_methods_jmethod_ids cache and the
3771 // InstanceKlass::_methods_cached_itable_indices cache are
3772 // both managed on the assumption that the initial cache
3773 // size is equal to the number of methods in the class. If
3774 // that changes, then InstanceKlass::idnum_can_increment()
3775 // has to be changed accordingly.
3776 this_klass->set_initial_method_idnum(methods->length());
3777 this_klass->set_name(cp->klass_name_at(this_class_index));
3778 if (is_anonymous()) // I am well known to myself
3779 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3781 // Allocate an annotation type if needed.
3782 if (fields_annotations != NULL ||
3783 methods_annotations != NULL ||
3784 methods_parameter_annotations != NULL ||
3785 methods_default_annotations != NULL ||
3786 fields_type_annotations != NULL ||
3787 methods_type_annotations != NULL) {
3788 Annotations* anno = Annotations::allocate(loader_data,
3789 fields_annotations, methods_annotations,
3790 methods_parameter_annotations,
3791 methods_default_annotations, CHECK_(nullHandle));
3792 this_klass->set_annotations(anno);
3793 } else {
3794 this_klass->set_annotations(NULL);
3795 }
3797 if (fields_type_annotations != NULL ||
3798 methods_type_annotations != NULL) {
3799 assert(this_klass->annotations() != NULL, "annotations should have been allocated");
3800 Annotations* anno = Annotations::allocate(loader_data,
3801 fields_type_annotations,
3802 methods_type_annotations,
3803 NULL,
3804 NULL, CHECK_(nullHandle));
3805 this_klass->annotations()->set_type_annotations(anno);
3806 }
3808 this_klass->set_minor_version(minor_version);
3809 this_klass->set_major_version(major_version);
3810 this_klass->set_has_default_methods(has_default_methods);
3812 // Set up Method*::intrinsic_id as soon as we know the names of methods.
3813 // (We used to do this lazily, but now we query it in Rewriter,
3814 // which is eagerly done for every method, so we might as well do it now,
3815 // when everything is fresh in memory.)
3816 if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
3817 for (int j = 0; j < methods->length(); j++) {
3818 methods->at(j)->init_intrinsic_id();
3819 }
3820 }
3822 if (cached_class_file_bytes != NULL) {
3823 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
3824 this_klass->set_cached_class_file(cached_class_file_bytes,
3825 cached_class_file_length);
3826 }
3828 // Fill in field values obtained by parse_classfile_attributes
3829 if (parsed_annotations.has_any_annotations())
3830 parsed_annotations.apply_to(this_klass);
3832 // Create annotations
3833 if (_annotations != NULL && this_klass->annotations() == NULL) {
3834 Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
3835 this_klass->set_annotations(anno);
3836 }
3837 apply_parsed_class_attributes(this_klass);
3839 // Create type annotations
3840 if (_type_annotations != NULL) {
3841 if (this_klass->annotations() == NULL) {
3842 Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
3843 this_klass->set_annotations(anno);
3844 }
3845 if (this_klass->annotations()->type_annotations() == NULL) {
3846 Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
3847 this_klass->annotations()->set_type_annotations(anno);
3848 }
3849 this_klass->annotations()->type_annotations()->set_class_annotations(_type_annotations);
3850 }
3852 // Miranda methods
3853 if ((num_miranda_methods > 0) ||
3854 // if this class introduced new miranda methods or
3855 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3856 // super class exists and this class inherited miranda methods
3857 ) {
3858 this_klass->set_has_miranda_methods(); // then set a flag
3859 }
3861 this_klass->set_transitive_interfaces(transitive_interfaces);
3863 // Fill in information needed to compute superclasses.
3864 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3866 // Initialize itable offset tables
3867 klassItable::setup_itable_offset_table(this_klass);
3869 // Compute transitive closure of interfaces this class implements
3870 // Do final class setup
3871 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3873 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
3874 set_precomputed_flags(this_klass);
3876 // reinitialize modifiers, using the InnerClasses attribute
3877 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3878 this_klass->set_modifier_flags(computed_modifiers);
3880 // check if this class can access its super class
3881 check_super_class_access(this_klass, CHECK_(nullHandle));
3883 // check if this class can access its superinterfaces
3884 check_super_interface_access(this_klass, CHECK_(nullHandle));
3886 // check if this class overrides any final method
3887 check_final_method_override(this_klass, CHECK_(nullHandle));
3889 // check that if this class is an interface then it doesn't have static methods
3890 if (this_klass->is_interface()) {
3891 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3892 }
3895 #ifdef ASSERT
3896 if (ParseAllGenericSignatures) {
3897 parseAndPrintGenericSignatures(this_klass, CHECK_(nullHandle));
3898 }
3899 #endif
3901 // Generate any default methods - default methods are interface methods
3902 // that have a default implementation. This is new with Lambda project.
3903 if (has_default_methods && !access_flags.is_interface() &&
3904 local_interfaces->length() > 0) {
3905 DefaultMethods::generate_default_methods(
3906 this_klass(), &all_mirandas, CHECK_(nullHandle));
3907 }
3909 // Allocate mirror and initialize static fields
3910 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3912 // Allocate a simple java object for locking during class initialization.
3913 // This needs to be a java object because it can be held across a java call.
3914 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL);
3915 this_klass->set_init_lock(r);
3917 // TODO: Move these oops to the mirror
3918 this_klass->set_protection_domain(protection_domain());
3920 // Update the loader_data graph.
3921 record_defined_class_dependencies(this_klass, CHECK_NULL);
3923 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
3924 false /* not shared class */);
3926 if (TraceClassLoading) {
3927 ResourceMark rm;
3928 // print in a single call to reduce interleaving of output
3929 if (cfs->source() != NULL) {
3930 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3931 cfs->source());
3932 } else if (class_loader.is_null()) {
3933 if (THREAD->is_Java_thread()) {
3934 Klass* caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3935 tty->print("[Loaded %s by instance of %s]\n",
3936 this_klass->external_name(),
3937 InstanceKlass::cast(caller)->external_name());
3938 } else {
3939 tty->print("[Loaded %s]\n", this_klass->external_name());
3940 }
3941 } else {
3942 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3943 InstanceKlass::cast(class_loader->klass())->external_name());
3944 }
3945 }
3947 if (TraceClassResolution) {
3948 ResourceMark rm;
3949 // print out the superclass.
3950 const char * from = this_klass()->external_name();
3951 if (this_klass->java_super() != NULL) {
3952 tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
3953 }
3954 // print out each of the interface classes referred to by this class.
3955 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
3956 if (local_interfaces != NULL) {
3957 int length = local_interfaces->length();
3958 for (int i = 0; i < length; i++) {
3959 Klass* k = local_interfaces->at(i);
3960 InstanceKlass* to_class = InstanceKlass::cast(k);
3961 const char * to = to_class->external_name();
3962 tty->print("RESOLVE %s %s (interface)\n", from, to);
3963 }
3964 }
3965 }
3967 #ifndef PRODUCT
3968 if( PrintCompactFieldsSavings ) {
3969 ResourceMark rm;
3970 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3971 tty->print("[Saved %d of %d bytes in %s]\n",
3972 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3973 orig_nonstatic_field_size*heapOopSize,
3974 this_klass->external_name());
3975 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3976 tty->print("[Wasted %d over %d bytes in %s]\n",
3977 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3978 orig_nonstatic_field_size*heapOopSize,
3979 this_klass->external_name());
3980 }
3981 }
3982 #endif
3984 // preserve result across HandleMark
3985 preserve_this_klass = this_klass();
3986 }
3988 // Create new handle outside HandleMark (might be needed for
3989 // Extended Class Redefinition)
3990 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3991 debug_only(this_klass->verify();)
3993 return this_klass;
3994 }
3996 unsigned int
3997 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3998 unsigned int nonstatic_oop_map_count,
3999 int first_nonstatic_oop_offset) {
4000 unsigned int map_count =
4001 super.is_null() ? 0 : super->nonstatic_oop_map_count();
4002 if (nonstatic_oop_map_count > 0) {
4003 // We have oops to add to map
4004 if (map_count == 0) {
4005 map_count = nonstatic_oop_map_count;
4006 } else {
4007 // Check whether we should add a new map block or whether the last one can
4008 // be extended
4009 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
4010 OopMapBlock* const last_map = first_map + map_count - 1;
4012 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
4013 if (next_offset == first_nonstatic_oop_offset) {
4014 // There is no gap bettwen superklass's last oop field and first
4015 // local oop field, merge maps.
4016 nonstatic_oop_map_count -= 1;
4017 } else {
4018 // Superklass didn't end with a oop field, add extra maps
4019 assert(next_offset < first_nonstatic_oop_offset, "just checking");
4020 }
4021 map_count += nonstatic_oop_map_count;
4022 }
4023 }
4024 return map_count;
4025 }
4028 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
4029 unsigned int nonstatic_oop_map_count,
4030 int* nonstatic_oop_offsets,
4031 unsigned int* nonstatic_oop_counts) {
4032 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4033 const InstanceKlass* const super = k->superklass();
4034 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4035 if (super_count > 0) {
4036 // Copy maps from superklass
4037 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4038 for (unsigned int i = 0; i < super_count; ++i) {
4039 *this_oop_map++ = *super_oop_map++;
4040 }
4041 }
4043 if (nonstatic_oop_map_count > 0) {
4044 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4045 // The counts differ because there is no gap between superklass's last oop
4046 // field and the first local oop field. Extend the last oop map copied
4047 // from the superklass instead of creating new one.
4048 nonstatic_oop_map_count--;
4049 nonstatic_oop_offsets++;
4050 this_oop_map--;
4051 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4052 this_oop_map++;
4053 }
4055 // Add new map blocks, fill them
4056 while (nonstatic_oop_map_count-- > 0) {
4057 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4058 this_oop_map->set_count(*nonstatic_oop_counts++);
4059 this_oop_map++;
4060 }
4061 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4062 this_oop_map, "sanity");
4063 }
4064 }
4067 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
4068 Klass* super = k->super();
4070 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4071 // in which case we don't have to register objects as finalizable
4072 if (!_has_empty_finalizer) {
4073 if (_has_finalizer ||
4074 (super != NULL && super->has_finalizer())) {
4075 k->set_has_finalizer();
4076 }
4077 }
4079 #ifdef ASSERT
4080 bool f = false;
4081 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
4082 vmSymbols::void_method_signature());
4083 if (m != NULL && !m->is_empty_method()) {
4084 f = true;
4085 }
4086 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
4087 #endif
4089 // Check if this klass supports the java.lang.Cloneable interface
4090 if (SystemDictionary::Cloneable_klass_loaded()) {
4091 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4092 k->set_is_cloneable();
4093 }
4094 }
4096 // Check if this klass has a vanilla default constructor
4097 if (super == NULL) {
4098 // java.lang.Object has empty default constructor
4099 k->set_has_vanilla_constructor();
4100 } else {
4101 if (super->has_vanilla_constructor() &&
4102 _has_vanilla_constructor) {
4103 k->set_has_vanilla_constructor();
4104 }
4105 #ifdef ASSERT
4106 bool v = false;
4107 if (super->has_vanilla_constructor()) {
4108 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
4109 ), vmSymbols::void_method_signature());
4110 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4111 v = true;
4112 }
4113 }
4114 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4115 #endif
4116 }
4118 // If it cannot be fast-path allocated, set a bit in the layout helper.
4119 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4120 assert(k->size_helper() > 0, "layout_helper is initialized");
4121 if ((!RegisterFinalizersAtInit && k->has_finalizer())
4122 || k->is_abstract() || k->is_interface()
4123 || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4124 || k->size_helper() >= FastAllocateSizeLimit) {
4125 // Forbid fast-path allocation.
4126 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4127 k->set_layout_helper(lh);
4128 }
4129 }
4131 // Attach super classes and interface classes to class loader data
4132 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4133 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4134 if (defining_loader_data->is_the_null_class_loader_data()) {
4135 // Dependencies to null class loader data are implicit.
4136 return;
4137 } else {
4138 // add super class dependency
4139 Klass* super = defined_klass->super();
4140 if (super != NULL) {
4141 defining_loader_data->record_dependency(super, CHECK);
4142 }
4144 // add super interface dependencies
4145 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4146 if (local_interfaces != NULL) {
4147 int length = local_interfaces->length();
4148 for (int i = 0; i < length; i++) {
4149 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4150 }
4151 }
4152 }
4153 }
4155 // utility method for appending and array with check for duplicates
4157 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4158 // iterate over new interfaces
4159 for (int i = 0; i < ifs->length(); i++) {
4160 Klass* e = ifs->at(i);
4161 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4162 // add new interface
4163 result->append_if_missing(e);
4164 }
4165 }
4168 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(ClassLoaderData* loader_data, instanceKlassHandle super, Array<Klass*>* local_ifs, TRAPS) {
4169 // Compute maximum size for transitive interfaces
4170 int max_transitive_size = 0;
4171 int super_size = 0;
4172 // Add superclass transitive interfaces size
4173 if (super.not_null()) {
4174 super_size = super->transitive_interfaces()->length();
4175 max_transitive_size += super_size;
4176 }
4177 // Add local interfaces' super interfaces
4178 int local_size = local_ifs->length();
4179 for (int i = 0; i < local_size; i++) {
4180 Klass* l = local_ifs->at(i);
4181 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4182 }
4183 // Finally add local interfaces
4184 max_transitive_size += local_size;
4185 // Construct array
4186 if (max_transitive_size == 0) {
4187 // no interfaces, use canonicalized array
4188 return Universe::the_empty_klass_array();
4189 } else if (max_transitive_size == super_size) {
4190 // no new local interfaces added, share superklass' transitive interface array
4191 return super->transitive_interfaces();
4192 } else if (max_transitive_size == local_size) {
4193 // only local interfaces added, share local interface array
4194 return local_ifs;
4195 } else {
4196 ResourceMark rm;
4197 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4199 // Copy down from superclass
4200 if (super.not_null()) {
4201 append_interfaces(result, super->transitive_interfaces());
4202 }
4204 // Copy down from local interfaces' superinterfaces
4205 for (int i = 0; i < local_ifs->length(); i++) {
4206 Klass* l = local_ifs->at(i);
4207 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4208 }
4209 // Finally add local interfaces
4210 append_interfaces(result, local_ifs);
4212 // length will be less than the max_transitive_size if duplicates were removed
4213 int length = result->length();
4214 assert(length <= max_transitive_size, "just checking");
4215 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4216 for (int i = 0; i < length; i++) {
4217 Klass* e = result->at(i);
4218 assert(e != NULL, "just checking");
4219 new_result->at_put(i, e);
4220 }
4221 return new_result;
4222 }
4223 }
4226 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4227 Klass* super = this_klass->super();
4228 if ((super != NULL) &&
4229 (!Reflection::verify_class_access(this_klass(), super, false))) {
4230 ResourceMark rm(THREAD);
4231 Exceptions::fthrow(
4232 THREAD_AND_LOCATION,
4233 vmSymbols::java_lang_IllegalAccessError(),
4234 "class %s cannot access its superclass %s",
4235 this_klass->external_name(),
4236 InstanceKlass::cast(super)->external_name()
4237 );
4238 return;
4239 }
4240 }
4243 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4244 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4245 int lng = local_interfaces->length();
4246 for (int i = lng - 1; i >= 0; i--) {
4247 Klass* k = local_interfaces->at(i);
4248 assert (k != NULL && k->is_interface(), "invalid interface");
4249 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4250 ResourceMark rm(THREAD);
4251 Exceptions::fthrow(
4252 THREAD_AND_LOCATION,
4253 vmSymbols::java_lang_IllegalAccessError(),
4254 "class %s cannot access its superinterface %s",
4255 this_klass->external_name(),
4256 InstanceKlass::cast(k)->external_name()
4257 );
4258 return;
4259 }
4260 }
4261 }
4264 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4265 Array<Method*>* methods = this_klass->methods();
4266 int num_methods = methods->length();
4268 // go thru each method and check if it overrides a final method
4269 for (int index = 0; index < num_methods; index++) {
4270 Method* m = methods->at(index);
4272 // skip private, static and <init> methods
4273 if ((!m->is_private()) &&
4274 (!m->is_static()) &&
4275 (m->name() != vmSymbols::object_initializer_name())) {
4277 Symbol* name = m->name();
4278 Symbol* signature = m->signature();
4279 Klass* k = this_klass->super();
4280 Method* super_m = NULL;
4281 while (k != NULL) {
4282 // skip supers that don't have final methods.
4283 if (k->has_final_method()) {
4284 // lookup a matching method in the super class hierarchy
4285 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4286 if (super_m == NULL) {
4287 break; // didn't find any match; get out
4288 }
4290 if (super_m->is_final() &&
4291 // matching method in super is final
4292 (Reflection::verify_field_access(this_klass(),
4293 super_m->method_holder(),
4294 super_m->method_holder(),
4295 super_m->access_flags(), false))
4296 // this class can access super final method and therefore override
4297 ) {
4298 ResourceMark rm(THREAD);
4299 Exceptions::fthrow(
4300 THREAD_AND_LOCATION,
4301 vmSymbols::java_lang_VerifyError(),
4302 "class %s overrides final method %s.%s",
4303 this_klass->external_name(),
4304 name->as_C_string(),
4305 signature->as_C_string()
4306 );
4307 return;
4308 }
4310 // continue to look from super_m's holder's super.
4311 k = super_m->method_holder()->super();
4312 continue;
4313 }
4315 k = k->super();
4316 }
4317 }
4318 }
4319 }
4322 // assumes that this_klass is an interface
4323 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4324 assert(this_klass->is_interface(), "not an interface");
4325 Array<Method*>* methods = this_klass->methods();
4326 int num_methods = methods->length();
4328 for (int index = 0; index < num_methods; index++) {
4329 Method* m = methods->at(index);
4330 // if m is static and not the init method, throw a verify error
4331 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4332 ResourceMark rm(THREAD);
4333 Exceptions::fthrow(
4334 THREAD_AND_LOCATION,
4335 vmSymbols::java_lang_VerifyError(),
4336 "Illegal static method %s in interface %s",
4337 m->name()->as_C_string(),
4338 this_klass->external_name()
4339 );
4340 return;
4341 }
4342 }
4343 }
4345 // utility methods for format checking
4347 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4348 if (!_need_verify) { return; }
4350 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4351 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4352 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4353 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4354 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4355 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4356 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4358 if ((is_abstract && is_final) ||
4359 (is_interface && !is_abstract) ||
4360 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4361 (!is_interface && major_gte_15 && is_annotation)) {
4362 ResourceMark rm(THREAD);
4363 Exceptions::fthrow(
4364 THREAD_AND_LOCATION,
4365 vmSymbols::java_lang_ClassFormatError(),
4366 "Illegal class modifiers in class %s: 0x%X",
4367 _class_name->as_C_string(), flags
4368 );
4369 return;
4370 }
4371 }
4373 bool ClassFileParser::has_illegal_visibility(jint flags) {
4374 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4375 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4376 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4378 return ((is_public && is_protected) ||
4379 (is_public && is_private) ||
4380 (is_protected && is_private));
4381 }
4383 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4384 u2 max_version =
4385 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4386 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4387 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4388 (major <= max_version) &&
4389 ((major != max_version) ||
4390 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4391 }
4393 void ClassFileParser::verify_legal_field_modifiers(
4394 jint flags, bool is_interface, TRAPS) {
4395 if (!_need_verify) { return; }
4397 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4398 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4399 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4400 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4401 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4402 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4403 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4404 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4405 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4407 bool is_illegal = false;
4409 if (is_interface) {
4410 if (!is_public || !is_static || !is_final || is_private ||
4411 is_protected || is_volatile || is_transient ||
4412 (major_gte_15 && is_enum)) {
4413 is_illegal = true;
4414 }
4415 } else { // not interface
4416 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4417 is_illegal = true;
4418 }
4419 }
4421 if (is_illegal) {
4422 ResourceMark rm(THREAD);
4423 Exceptions::fthrow(
4424 THREAD_AND_LOCATION,
4425 vmSymbols::java_lang_ClassFormatError(),
4426 "Illegal field modifiers in class %s: 0x%X",
4427 _class_name->as_C_string(), flags);
4428 return;
4429 }
4430 }
4432 void ClassFileParser::verify_legal_method_modifiers(
4433 jint flags, bool is_interface, Symbol* name, TRAPS) {
4434 if (!_need_verify) { return; }
4436 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4437 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4438 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4439 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4440 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4441 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4442 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4443 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4444 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4445 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4446 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4447 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4449 bool is_illegal = false;
4451 if (is_interface) {
4452 if (!is_public || is_static || is_final || is_native ||
4453 ((is_synchronized || is_strict) && major_gte_15 &&
4454 (!major_gte_8 || is_abstract)) ||
4455 (!major_gte_8 && !is_abstract)) {
4456 is_illegal = true;
4457 }
4458 } else { // not interface
4459 if (is_initializer) {
4460 if (is_static || is_final || is_synchronized || is_native ||
4461 is_abstract || (major_gte_15 && is_bridge)) {
4462 is_illegal = true;
4463 }
4464 } else { // not initializer
4465 if (is_abstract) {
4466 if ((is_final || is_native || is_private || is_static ||
4467 (major_gte_15 && (is_synchronized || is_strict)))) {
4468 is_illegal = true;
4469 }
4470 }
4471 if (has_illegal_visibility(flags)) {
4472 is_illegal = true;
4473 }
4474 }
4475 }
4477 if (is_illegal) {
4478 ResourceMark rm(THREAD);
4479 Exceptions::fthrow(
4480 THREAD_AND_LOCATION,
4481 vmSymbols::java_lang_ClassFormatError(),
4482 "Method %s in class %s has illegal modifiers: 0x%X",
4483 name->as_C_string(), _class_name->as_C_string(), flags);
4484 return;
4485 }
4486 }
4488 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4489 assert(_need_verify, "only called when _need_verify is true");
4490 int i = 0;
4491 int count = length >> 2;
4492 for (int k=0; k<count; k++) {
4493 unsigned char b0 = buffer[i];
4494 unsigned char b1 = buffer[i+1];
4495 unsigned char b2 = buffer[i+2];
4496 unsigned char b3 = buffer[i+3];
4497 // For an unsigned char v,
4498 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4499 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4500 unsigned char res = b0 | b0 - 1 |
4501 b1 | b1 - 1 |
4502 b2 | b2 - 1 |
4503 b3 | b3 - 1;
4504 if (res >= 128) break;
4505 i += 4;
4506 }
4507 for(; i < length; i++) {
4508 unsigned short c;
4509 // no embedded zeros
4510 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4511 if(buffer[i] < 128) {
4512 continue;
4513 }
4514 if ((i + 5) < length) { // see if it's legal supplementary character
4515 if (UTF8::is_supplementary_character(&buffer[i])) {
4516 c = UTF8::get_supplementary_character(&buffer[i]);
4517 i += 5;
4518 continue;
4519 }
4520 }
4521 switch (buffer[i] >> 4) {
4522 default: break;
4523 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4524 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4525 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4526 c = (buffer[i] & 0x1F) << 6;
4527 i++;
4528 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4529 c += buffer[i] & 0x3F;
4530 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4531 // for classes with major > 47, c must a null or a character in its shortest form
4532 break;
4533 }
4534 }
4535 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4536 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4537 c = (buffer[i] & 0xF) << 12;
4538 i += 2;
4539 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4540 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4541 if (_major_version <= 47 || c >= 0x800) {
4542 // for classes with major > 47, c must be in its shortest form
4543 break;
4544 }
4545 }
4546 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4547 } // end of switch
4548 } // end of for
4549 }
4551 // Checks if name is a legal class name.
4552 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4553 if (!_need_verify || _relax_verify) { return; }
4555 char buf[fixed_buffer_size];
4556 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4557 unsigned int length = name->utf8_length();
4558 bool legal = false;
4560 if (length > 0) {
4561 char* p;
4562 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4563 p = skip_over_field_signature(bytes, false, length, CHECK);
4564 legal = (p != NULL) && ((p - bytes) == (int)length);
4565 } else if (_major_version < JAVA_1_5_VERSION) {
4566 if (bytes[0] != '<') {
4567 p = skip_over_field_name(bytes, true, length);
4568 legal = (p != NULL) && ((p - bytes) == (int)length);
4569 }
4570 } else {
4571 // 4900761: relax the constraints based on JSR202 spec
4572 // Class names may be drawn from the entire Unicode character set.
4573 // Identifiers between '/' must be unqualified names.
4574 // The utf8 string has been verified when parsing cpool entries.
4575 legal = verify_unqualified_name(bytes, length, LegalClass);
4576 }
4577 }
4578 if (!legal) {
4579 ResourceMark rm(THREAD);
4580 Exceptions::fthrow(
4581 THREAD_AND_LOCATION,
4582 vmSymbols::java_lang_ClassFormatError(),
4583 "Illegal class name \"%s\" in class file %s", bytes,
4584 _class_name->as_C_string()
4585 );
4586 return;
4587 }
4588 }
4590 // Checks if name is a legal field name.
4591 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4592 if (!_need_verify || _relax_verify) { return; }
4594 char buf[fixed_buffer_size];
4595 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4596 unsigned int length = name->utf8_length();
4597 bool legal = false;
4599 if (length > 0) {
4600 if (_major_version < JAVA_1_5_VERSION) {
4601 if (bytes[0] != '<') {
4602 char* p = skip_over_field_name(bytes, false, length);
4603 legal = (p != NULL) && ((p - bytes) == (int)length);
4604 }
4605 } else {
4606 // 4881221: relax the constraints based on JSR202 spec
4607 legal = verify_unqualified_name(bytes, length, LegalField);
4608 }
4609 }
4611 if (!legal) {
4612 ResourceMark rm(THREAD);
4613 Exceptions::fthrow(
4614 THREAD_AND_LOCATION,
4615 vmSymbols::java_lang_ClassFormatError(),
4616 "Illegal field name \"%s\" in class %s", bytes,
4617 _class_name->as_C_string()
4618 );
4619 return;
4620 }
4621 }
4623 // Checks if name is a legal method name.
4624 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4625 if (!_need_verify || _relax_verify) { return; }
4627 assert(name != NULL, "method name is null");
4628 char buf[fixed_buffer_size];
4629 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4630 unsigned int length = name->utf8_length();
4631 bool legal = false;
4633 if (length > 0) {
4634 if (bytes[0] == '<') {
4635 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4636 legal = true;
4637 }
4638 } else if (_major_version < JAVA_1_5_VERSION) {
4639 char* p;
4640 p = skip_over_field_name(bytes, false, length);
4641 legal = (p != NULL) && ((p - bytes) == (int)length);
4642 } else {
4643 // 4881221: relax the constraints based on JSR202 spec
4644 legal = verify_unqualified_name(bytes, length, LegalMethod);
4645 }
4646 }
4648 if (!legal) {
4649 ResourceMark rm(THREAD);
4650 Exceptions::fthrow(
4651 THREAD_AND_LOCATION,
4652 vmSymbols::java_lang_ClassFormatError(),
4653 "Illegal method name \"%s\" in class %s", bytes,
4654 _class_name->as_C_string()
4655 );
4656 return;
4657 }
4658 }
4661 // Checks if signature is a legal field signature.
4662 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4663 if (!_need_verify) { return; }
4665 char buf[fixed_buffer_size];
4666 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4667 unsigned int length = signature->utf8_length();
4668 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4670 if (p == NULL || (p - bytes) != (int)length) {
4671 throwIllegalSignature("Field", name, signature, CHECK);
4672 }
4673 }
4675 // Checks if signature is a legal method signature.
4676 // Returns number of parameters
4677 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4678 if (!_need_verify) {
4679 // make sure caller's args_size will be less than 0 even for non-static
4680 // method so it will be recomputed in compute_size_of_parameters().
4681 return -2;
4682 }
4684 unsigned int args_size = 0;
4685 char buf[fixed_buffer_size];
4686 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4687 unsigned int length = signature->utf8_length();
4688 char* nextp;
4690 // The first character must be a '('
4691 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4692 length--;
4693 // Skip over legal field signatures
4694 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4695 while ((length > 0) && (nextp != NULL)) {
4696 args_size++;
4697 if (p[0] == 'J' || p[0] == 'D') {
4698 args_size++;
4699 }
4700 length -= nextp - p;
4701 p = nextp;
4702 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4703 }
4704 // The first non-signature thing better be a ')'
4705 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4706 length--;
4707 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4708 // All internal methods must return void
4709 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4710 return args_size;
4711 }
4712 } else {
4713 // Now we better just have a return value
4714 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4715 if (nextp && ((int)length == (nextp - p))) {
4716 return args_size;
4717 }
4718 }
4719 }
4720 }
4721 // Report error
4722 throwIllegalSignature("Method", name, signature, CHECK_0);
4723 return 0;
4724 }
4727 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4728 // Method names also may not contain the characters '<' or '>', unless <init>
4729 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4730 // method. Because these names have been checked as special cases before
4731 // calling this method in verify_legal_method_name.
4732 bool ClassFileParser::verify_unqualified_name(
4733 char* name, unsigned int length, int type) {
4734 jchar ch;
4736 for (char* p = name; p != name + length; ) {
4737 ch = *p;
4738 if (ch < 128) {
4739 p++;
4740 if (ch == '.' || ch == ';' || ch == '[' ) {
4741 return false; // do not permit '.', ';', or '['
4742 }
4743 if (type != LegalClass && ch == '/') {
4744 return false; // do not permit '/' unless it's class name
4745 }
4746 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4747 return false; // do not permit '<' or '>' in method names
4748 }
4749 } else {
4750 char* tmp_p = UTF8::next(p, &ch);
4751 p = tmp_p;
4752 }
4753 }
4754 return true;
4755 }
4758 // Take pointer to a string. Skip over the longest part of the string that could
4759 // be taken as a fieldname. Allow '/' if slash_ok is true.
4760 // Return a pointer to just past the fieldname.
4761 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4762 // being true, we saw consecutive slashes (meaning we were looking for a
4763 // qualified path but found something that was badly-formed).
4764 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4765 char* p;
4766 jchar ch;
4767 jboolean last_is_slash = false;
4768 jboolean not_first_ch = false;
4770 for (p = name; p != name + length; not_first_ch = true) {
4771 char* old_p = p;
4772 ch = *p;
4773 if (ch < 128) {
4774 p++;
4775 // quick check for ascii
4776 if ((ch >= 'a' && ch <= 'z') ||
4777 (ch >= 'A' && ch <= 'Z') ||
4778 (ch == '_' || ch == '$') ||
4779 (not_first_ch && ch >= '0' && ch <= '9')) {
4780 last_is_slash = false;
4781 continue;
4782 }
4783 if (slash_ok && ch == '/') {
4784 if (last_is_slash) {
4785 return NULL; // Don't permit consecutive slashes
4786 }
4787 last_is_slash = true;
4788 continue;
4789 }
4790 } else {
4791 jint unicode_ch;
4792 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4793 p = tmp_p;
4794 last_is_slash = false;
4795 // Check if ch is Java identifier start or is Java identifier part
4796 // 4672820: call java.lang.Character methods directly without generating separate tables.
4797 EXCEPTION_MARK;
4798 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4800 // return value
4801 JavaValue result(T_BOOLEAN);
4802 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4803 JavaCallArguments args;
4804 args.push_int(unicode_ch);
4806 // public static boolean isJavaIdentifierStart(char ch);
4807 JavaCalls::call_static(&result,
4808 klass,
4809 vmSymbols::isJavaIdentifierStart_name(),
4810 vmSymbols::int_bool_signature(),
4811 &args,
4812 THREAD);
4814 if (HAS_PENDING_EXCEPTION) {
4815 CLEAR_PENDING_EXCEPTION;
4816 return 0;
4817 }
4818 if (result.get_jboolean()) {
4819 continue;
4820 }
4822 if (not_first_ch) {
4823 // public static boolean isJavaIdentifierPart(char ch);
4824 JavaCalls::call_static(&result,
4825 klass,
4826 vmSymbols::isJavaIdentifierPart_name(),
4827 vmSymbols::int_bool_signature(),
4828 &args,
4829 THREAD);
4831 if (HAS_PENDING_EXCEPTION) {
4832 CLEAR_PENDING_EXCEPTION;
4833 return 0;
4834 }
4836 if (result.get_jboolean()) {
4837 continue;
4838 }
4839 }
4840 }
4841 return (not_first_ch) ? old_p : NULL;
4842 }
4843 return (not_first_ch) ? p : NULL;
4844 }
4847 // Take pointer to a string. Skip over the longest part of the string that could
4848 // be taken as a field signature. Allow "void" if void_ok.
4849 // Return a pointer to just past the signature.
4850 // Return NULL if no legal signature is found.
4851 char* ClassFileParser::skip_over_field_signature(char* signature,
4852 bool void_ok,
4853 unsigned int length,
4854 TRAPS) {
4855 unsigned int array_dim = 0;
4856 while (length > 0) {
4857 switch (signature[0]) {
4858 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4859 case JVM_SIGNATURE_BOOLEAN:
4860 case JVM_SIGNATURE_BYTE:
4861 case JVM_SIGNATURE_CHAR:
4862 case JVM_SIGNATURE_SHORT:
4863 case JVM_SIGNATURE_INT:
4864 case JVM_SIGNATURE_FLOAT:
4865 case JVM_SIGNATURE_LONG:
4866 case JVM_SIGNATURE_DOUBLE:
4867 return signature + 1;
4868 case JVM_SIGNATURE_CLASS: {
4869 if (_major_version < JAVA_1_5_VERSION) {
4870 // Skip over the class name if one is there
4871 char* p = skip_over_field_name(signature + 1, true, --length);
4873 // The next character better be a semicolon
4874 if (p && (p - signature) > 1 && p[0] == ';') {
4875 return p + 1;
4876 }
4877 } else {
4878 // 4900761: For class version > 48, any unicode is allowed in class name.
4879 length--;
4880 signature++;
4881 while (length > 0 && signature[0] != ';') {
4882 if (signature[0] == '.') {
4883 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4884 }
4885 length--;
4886 signature++;
4887 }
4888 if (signature[0] == ';') { return signature + 1; }
4889 }
4891 return NULL;
4892 }
4893 case JVM_SIGNATURE_ARRAY:
4894 array_dim++;
4895 if (array_dim > 255) {
4896 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4897 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4898 }
4899 // The rest of what's there better be a legal signature
4900 signature++;
4901 length--;
4902 void_ok = false;
4903 break;
4905 default:
4906 return NULL;
4907 }
4908 }
4909 return NULL;
4910 }