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 */
24
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/javaClasses.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/verificationType.hpp"
34 #include "classfile/verifier.hpp"
35 #include "classfile/vmSymbols.hpp"
36 #include "memory/allocation.hpp"
37 #include "memory/gcLocker.hpp"
38 #include "memory/metadataFactory.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/fieldStreams.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/instanceMirrorKlass.hpp"
45 #include "oops/klass.inline.hpp"
46 #include "oops/klassVtable.hpp"
47 #include "oops/method.hpp"
48 #include "oops/symbol.hpp"
49 #include "prims/jvm.h"
50 #include "prims/jvmtiExport.hpp"
51 #include "prims/jvmtiThreadState.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/perfData.hpp"
54 #include "runtime/reflection.hpp"
55 #include "runtime/signature.hpp"
56 #include "runtime/timer.hpp"
57 #include "services/classLoadingService.hpp"
58 #include "services/threadService.hpp"
59 #include "utilities/array.hpp"
60
61 // We generally try to create the oops directly when parsing, rather than
62 // allocating temporary data structures and copying the bytes twice. A
63 // temporary area is only needed when parsing utf8 entries in the constant
64 // pool and when parsing line number tables.
65
66 // We add assert in debug mode when class format is not checked.
67
68 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
69 #define JAVA_MIN_SUPPORTED_VERSION 45
70 #define JAVA_MAX_SUPPORTED_VERSION 51
71 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
72
73 // Used for two backward compatibility reasons:
74 // - to check for new additions to the class file format in JDK1.5
75 // - to check for bug fixes in the format checker in JDK1.5
76 #define JAVA_1_5_VERSION 49
77
78 // Used for backward compatibility reasons:
79 // - to check for javac bug fixes that happened after 1.5
80 // - also used as the max version when running in jdk6
81 #define JAVA_6_VERSION 50
82
83 // Used for backward compatibility reasons:
84 // - to check NameAndType_info signatures more aggressively
85 #define JAVA_7_VERSION 51
86
87
88 void ClassFileParser::parse_constant_pool_entries(ClassLoaderData* loader_data, constantPoolHandle cp, int length, TRAPS) {
89 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
90 // this function (_current can be allocated in a register, with scalar
91 // replacement of aggregates). The _current pointer is copied back to
92 // stream() when this function returns. DON'T call another method within
93 // this method that uses stream().
94 ClassFileStream* cfs0 = stream();
95 ClassFileStream cfs1 = *cfs0;
96 ClassFileStream* cfs = &cfs1;
97 #ifdef ASSERT
98 assert(cfs->allocated_on_stack(),"should be local");
99 u1* old_current = cfs0->current();
100 #endif
101 Handle class_loader(THREAD, loader_data->class_loader());
102
103 // Used for batching symbol allocations.
104 const char* names[SymbolTable::symbol_alloc_batch_size];
105 int lengths[SymbolTable::symbol_alloc_batch_size];
106 int indices[SymbolTable::symbol_alloc_batch_size];
107 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
108 int names_count = 0;
109
110 // parsing Index 0 is unused
111 for (int index = 1; index < length; index++) {
112 // Each of the following case guarantees one more byte in the stream
113 // for the following tag or the access_flags following constant pool,
114 // so we don't need bounds-check for reading tag.
115 u1 tag = cfs->get_u1_fast();
116 switch (tag) {
117 case JVM_CONSTANT_Class :
118 {
119 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
120 u2 name_index = cfs->get_u2_fast();
121 cp->klass_index_at_put(index, name_index);
122 }
123 break;
124 case JVM_CONSTANT_Fieldref :
125 {
126 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
127 u2 class_index = cfs->get_u2_fast();
128 u2 name_and_type_index = cfs->get_u2_fast();
129 cp->field_at_put(index, class_index, name_and_type_index);
130 }
131 break;
132 case JVM_CONSTANT_Methodref :
133 {
134 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
135 u2 class_index = cfs->get_u2_fast();
136 u2 name_and_type_index = cfs->get_u2_fast();
137 cp->method_at_put(index, class_index, name_and_type_index);
138 }
139 break;
140 case JVM_CONSTANT_InterfaceMethodref :
141 {
142 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
143 u2 class_index = cfs->get_u2_fast();
144 u2 name_and_type_index = cfs->get_u2_fast();
145 cp->interface_method_at_put(index, class_index, name_and_type_index);
146 }
147 break;
148 case JVM_CONSTANT_String :
149 {
150 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
151 u2 string_index = cfs->get_u2_fast();
152 cp->string_index_at_put(index, string_index);
153 }
154 break;
155 case JVM_CONSTANT_MethodHandle :
156 case JVM_CONSTANT_MethodType :
157 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
158 classfile_parse_error(
159 "Class file version does not support constant tag %u in class file %s",
160 tag, CHECK);
161 }
162 if (!EnableInvokeDynamic) {
163 classfile_parse_error(
164 "This JVM does not support constant tag %u in class file %s",
165 tag, CHECK);
166 }
167 if (tag == JVM_CONSTANT_MethodHandle) {
168 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
169 u1 ref_kind = cfs->get_u1_fast();
170 u2 method_index = cfs->get_u2_fast();
171 cp->method_handle_index_at_put(index, ref_kind, method_index);
172 } else if (tag == JVM_CONSTANT_MethodType) {
173 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
174 u2 signature_index = cfs->get_u2_fast();
175 cp->method_type_index_at_put(index, signature_index);
176 } else {
177 ShouldNotReachHere();
178 }
179 break;
180 case JVM_CONSTANT_InvokeDynamic :
181 {
182 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
183 classfile_parse_error(
184 "Class file version does not support constant tag %u in class file %s",
185 tag, CHECK);
186 }
187 if (!EnableInvokeDynamic) {
188 classfile_parse_error(
189 "This JVM does not support constant tag %u in class file %s",
190 tag, CHECK);
191 }
192 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
193 u2 bootstrap_specifier_index = cfs->get_u2_fast();
194 u2 name_and_type_index = cfs->get_u2_fast();
195 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
196 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
197 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
198 }
199 break;
200 case JVM_CONSTANT_Integer :
201 {
202 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
203 u4 bytes = cfs->get_u4_fast();
204 cp->int_at_put(index, (jint) bytes);
205 }
206 break;
207 case JVM_CONSTANT_Float :
208 {
209 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
210 u4 bytes = cfs->get_u4_fast();
211 cp->float_at_put(index, *(jfloat*)&bytes);
212 }
213 break;
214 case JVM_CONSTANT_Long :
215 // A mangled type might cause you to overrun allocated memory
216 guarantee_property(index+1 < length,
217 "Invalid constant pool entry %u in class file %s",
218 index, CHECK);
219 {
220 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
221 u8 bytes = cfs->get_u8_fast();
222 cp->long_at_put(index, bytes);
223 }
224 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
225 break;
226 case JVM_CONSTANT_Double :
227 // A mangled type might cause you to overrun allocated memory
228 guarantee_property(index+1 < length,
229 "Invalid constant pool entry %u in class file %s",
230 index, CHECK);
231 {
232 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
233 u8 bytes = cfs->get_u8_fast();
234 cp->double_at_put(index, *(jdouble*)&bytes);
235 }
236 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
237 break;
238 case JVM_CONSTANT_NameAndType :
239 {
240 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
241 u2 name_index = cfs->get_u2_fast();
242 u2 signature_index = cfs->get_u2_fast();
243 cp->name_and_type_at_put(index, name_index, signature_index);
244 }
245 break;
246 case JVM_CONSTANT_Utf8 :
247 {
248 cfs->guarantee_more(2, CHECK); // utf8_length
249 u2 utf8_length = cfs->get_u2_fast();
250 u1* utf8_buffer = cfs->get_u1_buffer();
251 assert(utf8_buffer != NULL, "null utf8 buffer");
252 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
253 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
254 cfs->skip_u1_fast(utf8_length);
255
256 // Before storing the symbol, make sure it's legal
257 if (_need_verify) {
258 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
259 }
260
261 if (EnableInvokeDynamic && has_cp_patch_at(index)) {
262 Handle patch = clear_cp_patch_at(index);
263 guarantee_property(java_lang_String::is_instance(patch()),
264 "Illegal utf8 patch at %d in class file %s",
265 index, CHECK);
266 char* str = java_lang_String::as_utf8_string(patch());
267 // (could use java_lang_String::as_symbol instead, but might as well batch them)
268 utf8_buffer = (u1*) str;
269 utf8_length = (int) strlen(str);
270 }
271
272 unsigned int hash;
273 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
274 if (result == NULL) {
275 names[names_count] = (char*)utf8_buffer;
276 lengths[names_count] = utf8_length;
277 indices[names_count] = index;
278 hashValues[names_count++] = hash;
279 if (names_count == SymbolTable::symbol_alloc_batch_size) {
280 SymbolTable::new_symbols(loader_data, cp, names_count, names, lengths, indices, hashValues, CHECK);
281 names_count = 0;
282 }
283 } else {
284 cp->symbol_at_put(index, result);
285 }
286 }
287 break;
288 default:
289 classfile_parse_error(
290 "Unknown constant tag %u in class file %s", tag, CHECK);
291 break;
292 }
293 }
294
295 // Allocate the remaining symbols
296 if (names_count > 0) {
297 SymbolTable::new_symbols(loader_data, cp, names_count, names, lengths, indices, hashValues, CHECK);
298 }
299
300 // Copy _current pointer of local copy back to stream().
301 #ifdef ASSERT
302 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
303 #endif
304 cfs0->set_current(cfs1.current());
305 }
306
307 // This class unreferences constant pool symbols if an error has occurred
308 // while parsing the class before it is assigned into the class.
309 // If it gets an error after that it is unloaded and the constant pool will
310 // be cleaned up then.
311 class ConstantPoolCleaner : public StackObj {
312 constantPoolHandle _cphandle;
313 bool _in_error;
314 public:
315 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
316 ~ConstantPoolCleaner() {
317 if (_in_error && _cphandle.not_null()) {
318 _cphandle->unreference_symbols();
319 }
320 }
321 void set_in_error(bool clean) { _in_error = clean; }
322 };
323
324 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
325
326 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
327 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
328 return cp->symbol_at(index);
329 else
330 return NULL;
331 }
332
333 constantPoolHandle ClassFileParser::parse_constant_pool(ClassLoaderData* loader_data, TRAPS) {
334 ClassFileStream* cfs = stream();
335 constantPoolHandle nullHandle;
336
337 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
338 u2 length = cfs->get_u2_fast();
339 guarantee_property(
340 length >= 1, "Illegal constant pool size %u in class file %s",
341 length, CHECK_(nullHandle));
342 ConstantPool* constant_pool =
343 ConstantPool::allocate(loader_data,
344 length,
345 CHECK_(nullHandle));
346 constantPoolHandle cp (THREAD, constant_pool);
347
348 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
349
350 // parsing constant pool entries
351 parse_constant_pool_entries(loader_data, cp, length, CHECK_(nullHandle));
352
353 int index = 1; // declared outside of loops for portability
354
355 // first verification pass - validate cross references and fixup class and string constants
356 for (index = 1; index < length; index++) { // Index 0 is unused
357 jbyte tag = cp->tag_at(index).value();
358 switch (tag) {
359 case JVM_CONSTANT_Class :
360 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
361 break;
362 case JVM_CONSTANT_Fieldref :
363 // fall through
364 case JVM_CONSTANT_Methodref :
365 // fall through
366 case JVM_CONSTANT_InterfaceMethodref : {
367 if (!_need_verify) break;
368 int klass_ref_index = cp->klass_ref_index_at(index);
369 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
370 check_property(valid_cp_range(klass_ref_index, length) &&
371 is_klass_reference(cp, klass_ref_index),
372 "Invalid constant pool index %u in class file %s",
373 klass_ref_index,
374 CHECK_(nullHandle));
375 check_property(valid_cp_range(name_and_type_ref_index, length) &&
376 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
377 "Invalid constant pool index %u in class file %s",
378 name_and_type_ref_index,
379 CHECK_(nullHandle));
380 break;
381 }
382 case JVM_CONSTANT_String :
383 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
384 break;
385 case JVM_CONSTANT_Integer :
386 break;
387 case JVM_CONSTANT_Float :
388 break;
389 case JVM_CONSTANT_Long :
390 case JVM_CONSTANT_Double :
391 index++;
392 check_property(
393 (index < length && cp->tag_at(index).is_invalid()),
394 "Improper constant pool long/double index %u in class file %s",
395 index, CHECK_(nullHandle));
396 break;
397 case JVM_CONSTANT_NameAndType : {
398 if (!_need_verify) break;
399 int name_ref_index = cp->name_ref_index_at(index);
400 int signature_ref_index = cp->signature_ref_index_at(index);
401 check_property(
402 valid_cp_range(name_ref_index, length) &&
403 cp->tag_at(name_ref_index).is_utf8(),
404 "Invalid constant pool index %u in class file %s",
405 name_ref_index, CHECK_(nullHandle));
406 check_property(
407 valid_cp_range(signature_ref_index, length) &&
408 cp->tag_at(signature_ref_index).is_utf8(),
409 "Invalid constant pool index %u in class file %s",
410 signature_ref_index, CHECK_(nullHandle));
411 break;
412 }
413 case JVM_CONSTANT_Utf8 :
414 break;
415 case JVM_CONSTANT_UnresolvedClass : // fall-through
416 case JVM_CONSTANT_UnresolvedClassInError:
417 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
418 break;
419 case JVM_CONSTANT_ClassIndex :
420 {
421 int class_index = cp->klass_index_at(index);
422 check_property(
423 valid_cp_range(class_index, length) &&
424 cp->tag_at(class_index).is_utf8(),
425 "Invalid constant pool index %u in class file %s",
426 class_index, CHECK_(nullHandle));
427 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
428 }
429 break;
430 case JVM_CONSTANT_StringIndex :
431 {
432 int string_index = cp->string_index_at(index);
433 check_property(
434 valid_cp_range(string_index, length) &&
435 cp->tag_at(string_index).is_utf8(),
436 "Invalid constant pool index %u in class file %s",
437 string_index, CHECK_(nullHandle));
438 Symbol* sym = cp->symbol_at(string_index);
439 cp->unresolved_string_at_put(index, sym);
440 }
441 break;
442 case JVM_CONSTANT_MethodHandle :
443 {
444 int ref_index = cp->method_handle_index_at(index);
445 check_property(
446 valid_cp_range(ref_index, length) &&
447 EnableInvokeDynamic,
448 "Invalid constant pool index %u in class file %s",
449 ref_index, CHECK_(nullHandle));
450 constantTag tag = cp->tag_at(ref_index);
451 int ref_kind = cp->method_handle_ref_kind_at(index);
452 switch (ref_kind) {
453 case JVM_REF_getField:
454 case JVM_REF_getStatic:
455 case JVM_REF_putField:
456 case JVM_REF_putStatic:
457 check_property(
458 tag.is_field(),
459 "Invalid constant pool index %u in class file %s (not a field)",
460 ref_index, CHECK_(nullHandle));
461 break;
462 case JVM_REF_invokeVirtual:
463 case JVM_REF_invokeStatic:
464 case JVM_REF_invokeSpecial:
465 case JVM_REF_newInvokeSpecial:
466 check_property(
467 tag.is_method(),
468 "Invalid constant pool index %u in class file %s (not a method)",
469 ref_index, CHECK_(nullHandle));
470 break;
471 case JVM_REF_invokeInterface:
472 check_property(
473 tag.is_interface_method(),
474 "Invalid constant pool index %u in class file %s (not an interface method)",
475 ref_index, CHECK_(nullHandle));
476 break;
477 default:
478 classfile_parse_error(
479 "Bad method handle kind at constant pool index %u in class file %s",
480 index, CHECK_(nullHandle));
481 }
482 // Keep the ref_index unchanged. It will be indirected at link-time.
483 }
484 break;
485 case JVM_CONSTANT_MethodType :
486 {
487 int ref_index = cp->method_type_index_at(index);
488 check_property(
489 valid_cp_range(ref_index, length) &&
490 cp->tag_at(ref_index).is_utf8() &&
491 EnableInvokeDynamic,
492 "Invalid constant pool index %u in class file %s",
493 ref_index, CHECK_(nullHandle));
494 }
495 break;
496 case JVM_CONSTANT_InvokeDynamic :
497 {
498 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
499 check_property(valid_cp_range(name_and_type_ref_index, length) &&
500 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
501 "Invalid constant pool index %u in class file %s",
502 name_and_type_ref_index,
503 CHECK_(nullHandle));
504 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
505 break;
506 }
507 default:
508 fatal(err_msg("bad constant pool tag value %u",
509 cp->tag_at(index).value()));
510 ShouldNotReachHere();
511 break;
512 } // end of switch
513 } // end of for
514
515 if (_cp_patches != NULL) {
516 // need to treat this_class specially...
517 assert(EnableInvokeDynamic, "");
518 int this_class_index;
519 {
520 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
521 u1* mark = cfs->current();
522 u2 flags = cfs->get_u2_fast();
523 this_class_index = cfs->get_u2_fast();
524 cfs->set_current(mark); // revert to mark
525 }
526
527 for (index = 1; index < length; index++) { // Index 0 is unused
528 if (has_cp_patch_at(index)) {
529 guarantee_property(index != this_class_index,
530 "Illegal constant pool patch to self at %d in class file %s",
531 index, CHECK_(nullHandle));
532 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
533 }
534 }
535 }
536
537 if (!_need_verify) {
538 cp_in_error.set_in_error(false);
539 return cp;
540 }
541
542 // second verification pass - checks the strings are of the right format.
543 // but not yet to the other entries
544 for (index = 1; index < length; index++) {
545 jbyte tag = cp->tag_at(index).value();
546 switch (tag) {
547 case JVM_CONSTANT_UnresolvedClass: {
548 Symbol* class_name = cp->unresolved_klass_at(index);
549 // check the name, even if _cp_patches will overwrite it
550 verify_legal_class_name(class_name, CHECK_(nullHandle));
551 break;
552 }
553 case JVM_CONSTANT_NameAndType: {
554 if (_need_verify && _major_version >= JAVA_7_VERSION) {
555 int sig_index = cp->signature_ref_index_at(index);
556 int name_index = cp->name_ref_index_at(index);
557 Symbol* name = cp->symbol_at(name_index);
558 Symbol* sig = cp->symbol_at(sig_index);
559 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
560 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
561 } else {
562 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
563 }
564 }
565 break;
566 }
567 case JVM_CONSTANT_InvokeDynamic:
568 case JVM_CONSTANT_Fieldref:
569 case JVM_CONSTANT_Methodref:
570 case JVM_CONSTANT_InterfaceMethodref: {
571 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
572 // already verified to be utf8
573 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
574 // already verified to be utf8
575 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
576 Symbol* name = cp->symbol_at(name_ref_index);
577 Symbol* signature = cp->symbol_at(signature_ref_index);
578 if (tag == JVM_CONSTANT_Fieldref) {
579 verify_legal_field_name(name, CHECK_(nullHandle));
580 if (_need_verify && _major_version >= JAVA_7_VERSION) {
581 // Signature is verified above, when iterating NameAndType_info.
582 // Need only to be sure it's the right type.
583 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
584 throwIllegalSignature(
585 "Field", name, signature, CHECK_(nullHandle));
586 }
587 } else {
588 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
589 }
590 } else {
591 verify_legal_method_name(name, CHECK_(nullHandle));
592 if (_need_verify && _major_version >= JAVA_7_VERSION) {
593 // Signature is verified above, when iterating NameAndType_info.
594 // Need only to be sure it's the right type.
595 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
596 throwIllegalSignature(
597 "Method", name, signature, CHECK_(nullHandle));
598 }
599 } else {
600 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
601 }
602 if (tag == JVM_CONSTANT_Methodref) {
603 // 4509014: If a class method name begins with '<', it must be "<init>".
604 assert(name != NULL, "method name in constant pool is null");
605 unsigned int name_len = name->utf8_length();
606 assert(name_len > 0, "bad method name"); // already verified as legal name
607 if (name->byte_at(0) == '<') {
608 if (name != vmSymbols::object_initializer_name()) {
609 classfile_parse_error(
610 "Bad method name at constant pool index %u in class file %s",
611 name_ref_index, CHECK_(nullHandle));
612 }
613 }
614 }
615 }
616 break;
617 }
618 case JVM_CONSTANT_MethodHandle: {
619 int ref_index = cp->method_handle_index_at(index);
620 int ref_kind = cp->method_handle_ref_kind_at(index);
621 switch (ref_kind) {
622 case JVM_REF_invokeVirtual:
623 case JVM_REF_invokeStatic:
624 case JVM_REF_invokeSpecial:
625 case JVM_REF_newInvokeSpecial:
626 {
627 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
628 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
629 Symbol* name = cp->symbol_at(name_ref_index);
630 if (ref_kind == JVM_REF_newInvokeSpecial) {
631 if (name != vmSymbols::object_initializer_name()) {
632 classfile_parse_error(
633 "Bad constructor name at constant pool index %u in class file %s",
634 name_ref_index, CHECK_(nullHandle));
635 }
636 } else {
637 if (name == vmSymbols::object_initializer_name()) {
638 classfile_parse_error(
639 "Bad method name at constant pool index %u in class file %s",
640 name_ref_index, CHECK_(nullHandle));
641 }
642 }
643 }
644 break;
645 // Other ref_kinds are already fully checked in previous pass.
646 }
647 break;
648 }
649 case JVM_CONSTANT_MethodType: {
650 Symbol* no_name = vmSymbols::type_name(); // place holder
651 Symbol* signature = cp->method_type_signature_at(index);
652 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
653 break;
654 }
655 case JVM_CONSTANT_Utf8: {
656 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
657 }
658 } // end of switch
659 } // end of for
660
661 cp_in_error.set_in_error(false);
662 return cp;
663 }
664
665
666 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
667 assert(EnableInvokeDynamic, "");
668 BasicType patch_type = T_VOID;
669
670 switch (cp->tag_at(index).value()) {
671
672 case JVM_CONSTANT_UnresolvedClass :
673 // Patching a class means pre-resolving it.
674 // The name in the constant pool is ignored.
675 if (java_lang_Class::is_instance(patch())) {
676 guarantee_property(!java_lang_Class::is_primitive(patch()),
677 "Illegal class patch at %d in class file %s",
678 index, CHECK);
679 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
680 } else {
681 guarantee_property(java_lang_String::is_instance(patch()),
682 "Illegal class patch at %d in class file %s",
683 index, CHECK);
684 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
685 cp->unresolved_klass_at_put(index, name);
686 }
687 break;
688
689 case JVM_CONSTANT_String :
690 // skip this patch and don't clear it. Needs the oop array for resolved
691 // references to be created first.
692 return;
693
694 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
695 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
696 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
697 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
698 patch_prim:
699 {
700 jvalue value;
701 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
702 guarantee_property(value_type == patch_type,
703 "Illegal primitive patch at %d in class file %s",
704 index, CHECK);
705 switch (value_type) {
706 case T_INT: cp->int_at_put(index, value.i); break;
707 case T_FLOAT: cp->float_at_put(index, value.f); break;
708 case T_LONG: cp->long_at_put(index, value.j); break;
709 case T_DOUBLE: cp->double_at_put(index, value.d); break;
710 default: assert(false, "");
711 }
712 }
713 break;
714
715 default:
716 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
717 guarantee_property(!has_cp_patch_at(index),
718 "Illegal unexpected patch at %d in class file %s",
719 index, CHECK);
720 return;
721 }
722
723 // On fall-through, mark the patch as used.
724 clear_cp_patch_at(index);
725 }
726
727
728
729 class NameSigHash: public ResourceObj {
730 public:
731 Symbol* _name; // name
732 Symbol* _sig; // signature
733 NameSigHash* _next; // Next entry in hash table
734 };
735
736
737 #define HASH_ROW_SIZE 256
738
739 unsigned int hash(Symbol* name, Symbol* sig) {
740 unsigned int raw_hash = 0;
741 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
742 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
743
744 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
745 }
746
747
748 void initialize_hashtable(NameSigHash** table) {
749 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
750 }
751
752 // Return false if the name/sig combination is found in table.
753 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
754 // The old format checker uses heap sort to find duplicates.
755 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
756 // of table since we don't expect Symbol*'s to move.
757 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
758 assert(name != NULL, "name in constant pool is NULL");
759
760 // First lookup for duplicates
761 int index = hash(name, sig);
762 NameSigHash* entry = table[index];
763 while (entry != NULL) {
764 if (entry->_name == name && entry->_sig == sig) {
765 return false;
766 }
767 entry = entry->_next;
768 }
769
770 // No duplicate is found, allocate a new entry and fill it.
771 entry = new NameSigHash();
772 entry->_name = name;
773 entry->_sig = sig;
774
775 // Insert into hash table
776 entry->_next = table[index];
777 table[index] = entry;
778
779 return true;
780 }
781
782
783 Array<Klass*>* ClassFileParser::parse_interfaces(constantPoolHandle cp,
784 int length,
785 ClassLoaderData* loader_data,
786 Handle protection_domain,
787 Symbol* class_name,
788 TRAPS) {
789 ClassFileStream* cfs = stream();
790 assert(length > 0, "only called for length>0");
791 // FIXME: Leak at later OOM.
792 Array<Klass*>* interfaces = MetadataFactory::new_array<Klass*>(loader_data, length, NULL, CHECK_NULL);
793
794 int index;
795 for (index = 0; index < length; index++) {
796 u2 interface_index = cfs->get_u2(CHECK_NULL);
797 KlassHandle interf;
798 check_property(
799 valid_cp_range(interface_index, cp->length()) &&
800 is_klass_reference(cp, interface_index),
801 "Interface name has bad constant pool index %u in class file %s",
802 interface_index, CHECK_NULL);
803 if (cp->tag_at(interface_index).is_klass()) {
804 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
805 } else {
806 Symbol* unresolved_klass = cp->klass_name_at(interface_index);
807
808 // Don't need to check legal name because it's checked when parsing constant pool.
809 // But need to make sure it's not an array type.
810 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
811 "Bad interface name in class file %s", CHECK_NULL);
812 Handle class_loader(THREAD, loader_data->class_loader());
813
814 // Call resolve_super so classcircularity is checked
815 Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
816 unresolved_klass, class_loader, protection_domain,
817 false, CHECK_NULL);
818 interf = KlassHandle(THREAD, k);
819 }
820
821 if (!Klass::cast(interf())->is_interface()) {
822 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
823 }
824 interfaces->at_put(index, interf());
825 }
826
827 if (!_need_verify || length <= 1) {
828 return interfaces;
829 }
830
831 // Check if there's any duplicates in interfaces
832 ResourceMark rm(THREAD);
833 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
834 THREAD, NameSigHash*, HASH_ROW_SIZE);
835 initialize_hashtable(interface_names);
836 bool dup = false;
837 {
838 debug_only(No_Safepoint_Verifier nsv;)
839 for (index = 0; index < length; index++) {
840 Klass* k = interfaces->at(index);
841 Symbol* name = InstanceKlass::cast(k)->name();
842 // If no duplicates, add (name, NULL) in hashtable interface_names.
843 if (!put_after_lookup(name, NULL, interface_names)) {
844 dup = true;
845 break;
846 }
847 }
848 }
849 if (dup) {
850 classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
851 }
852
853 return interfaces;
854 }
855
856
857 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
858 // Make sure the constant pool entry is of a type appropriate to this field
859 guarantee_property(
860 (constantvalue_index > 0 &&
861 constantvalue_index < cp->length()),
862 "Bad initial value index %u in ConstantValue attribute in class file %s",
863 constantvalue_index, CHECK);
864 constantTag value_type = cp->tag_at(constantvalue_index);
865 switch ( cp->basic_type_for_signature_at(signature_index) ) {
866 case T_LONG:
867 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
868 break;
869 case T_FLOAT:
870 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
871 break;
872 case T_DOUBLE:
873 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
874 break;
875 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
876 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
877 break;
878 case T_OBJECT:
879 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
880 && value_type.is_string()),
881 "Bad string initial value in class file %s", CHECK);
882 break;
883 default:
884 classfile_parse_error(
885 "Unable to set initial value %u in class file %s",
886 constantvalue_index, CHECK);
887 }
888 }
889
890
891 // Parse attributes for a field.
892 void ClassFileParser::parse_field_attributes(ClassLoaderData* loader_data,
893 constantPoolHandle cp,
894 u2 attributes_count,
895 bool is_static, u2 signature_index,
896 u2* constantvalue_index_addr,
897 bool* is_synthetic_addr,
898 u2* generic_signature_index_addr,
899 AnnotationArray** field_annotations,
900 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
901 TRAPS) {
902 ClassFileStream* cfs = stream();
903 assert(attributes_count > 0, "length should be greater than 0");
904 u2 constantvalue_index = 0;
905 u2 generic_signature_index = 0;
906 bool is_synthetic = false;
907 u1* runtime_visible_annotations = NULL;
908 int runtime_visible_annotations_length = 0;
909 u1* runtime_invisible_annotations = NULL;
910 int runtime_invisible_annotations_length = 0;
911 while (attributes_count--) {
912 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
913 u2 attribute_name_index = cfs->get_u2_fast();
914 u4 attribute_length = cfs->get_u4_fast();
915 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
916 cp->tag_at(attribute_name_index).is_utf8(),
917 "Invalid field attribute index %u in class file %s",
918 attribute_name_index,
919 CHECK);
920 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
921 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
922 // ignore if non-static
923 if (constantvalue_index != 0) {
924 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
925 }
926 check_property(
927 attribute_length == 2,
928 "Invalid ConstantValue field attribute length %u in class file %s",
929 attribute_length, CHECK);
930 constantvalue_index = cfs->get_u2(CHECK);
931 if (_need_verify) {
932 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
933 }
934 } else if (attribute_name == vmSymbols::tag_synthetic()) {
935 if (attribute_length != 0) {
936 classfile_parse_error(
937 "Invalid Synthetic field attribute length %u in class file %s",
938 attribute_length, CHECK);
939 }
940 is_synthetic = true;
941 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
942 if (attribute_length != 0) {
943 classfile_parse_error(
944 "Invalid Deprecated field attribute length %u in class file %s",
945 attribute_length, CHECK);
946 }
947 } else if (_major_version >= JAVA_1_5_VERSION) {
948 if (attribute_name == vmSymbols::tag_signature()) {
949 if (attribute_length != 2) {
950 classfile_parse_error(
951 "Wrong size %u for field's Signature attribute in class file %s",
952 attribute_length, CHECK);
953 }
954 generic_signature_index = cfs->get_u2(CHECK);
955 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
956 runtime_visible_annotations_length = attribute_length;
957 runtime_visible_annotations = cfs->get_u1_buffer();
958 assert(runtime_visible_annotations != NULL, "null visible annotations");
959 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
960 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
961 runtime_invisible_annotations_length = attribute_length;
962 runtime_invisible_annotations = cfs->get_u1_buffer();
963 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
964 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
965 } else {
966 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
967 }
968 } else {
969 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
970 }
971 }
972
973 *constantvalue_index_addr = constantvalue_index;
974 *is_synthetic_addr = is_synthetic;
975 *generic_signature_index_addr = generic_signature_index;
976 *field_annotations = assemble_annotations(loader_data,
977 runtime_visible_annotations,
978 runtime_visible_annotations_length,
979 runtime_invisible_annotations,
980 runtime_invisible_annotations_length,
981 CHECK);
982 return;
983 }
984
985
986 // Field allocation types. Used for computing field offsets.
987
988 enum FieldAllocationType {
989 STATIC_OOP, // Oops
990 STATIC_BYTE, // Boolean, Byte, char
991 STATIC_SHORT, // shorts
992 STATIC_WORD, // ints
993 STATIC_DOUBLE, // aligned long or double
994 NONSTATIC_OOP,
995 NONSTATIC_BYTE,
996 NONSTATIC_SHORT,
997 NONSTATIC_WORD,
998 NONSTATIC_DOUBLE,
999 MAX_FIELD_ALLOCATION_TYPE,
1000 BAD_ALLOCATION_TYPE = -1
1001 };
1002
1003 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1004 BAD_ALLOCATION_TYPE, // 0
1005 BAD_ALLOCATION_TYPE, // 1
1006 BAD_ALLOCATION_TYPE, // 2
1007 BAD_ALLOCATION_TYPE, // 3
1008 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1009 NONSTATIC_SHORT, // T_CHAR = 5,
1010 NONSTATIC_WORD, // T_FLOAT = 6,
1011 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1012 NONSTATIC_BYTE, // T_BYTE = 8,
1013 NONSTATIC_SHORT, // T_SHORT = 9,
1014 NONSTATIC_WORD, // T_INT = 10,
1015 NONSTATIC_DOUBLE, // T_LONG = 11,
1016 NONSTATIC_OOP, // T_OBJECT = 12,
1017 NONSTATIC_OOP, // T_ARRAY = 13,
1018 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1019 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1020 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1021 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1022 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1023 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1024 BAD_ALLOCATION_TYPE, // 0
1025 BAD_ALLOCATION_TYPE, // 1
1026 BAD_ALLOCATION_TYPE, // 2
1027 BAD_ALLOCATION_TYPE, // 3
1028 STATIC_BYTE , // T_BOOLEAN = 4,
1029 STATIC_SHORT, // T_CHAR = 5,
1030 STATIC_WORD, // T_FLOAT = 6,
1031 STATIC_DOUBLE, // T_DOUBLE = 7,
1032 STATIC_BYTE, // T_BYTE = 8,
1033 STATIC_SHORT, // T_SHORT = 9,
1034 STATIC_WORD, // T_INT = 10,
1035 STATIC_DOUBLE, // T_LONG = 11,
1036 STATIC_OOP, // T_OBJECT = 12,
1037 STATIC_OOP, // T_ARRAY = 13,
1038 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1039 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1040 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1041 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1042 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1043 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1044 };
1045
1046 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1047 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1048 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1049 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1050 return result;
1051 }
1052
1053 class FieldAllocationCount: public ResourceObj {
1054 public:
1055 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1056
1057 FieldAllocationCount() {
1058 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1059 count[i] = 0;
1060 }
1061 }
1062
1063 FieldAllocationType update(bool is_static, BasicType type) {
1064 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1065 // Make sure there is no overflow with injected fields.
1066 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1067 count[atype]++;
1068 return atype;
1069 }
1070 };
1071
1072 Array<u2>* ClassFileParser::parse_fields(ClassLoaderData* loader_data,
1073 Symbol* class_name,
1074 constantPoolHandle cp, bool is_interface,
1075 FieldAllocationCount *fac,
1076 Array<AnnotationArray*>** fields_annotations,
1077 u2* java_fields_count_ptr, TRAPS) {
1078 ClassFileStream* cfs = stream();
1079 cfs->guarantee_more(2, CHECK_NULL); // length
1080 u2 length = cfs->get_u2_fast();
1081 *java_fields_count_ptr = length;
1082
1083 int num_injected = 0;
1084 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1085 int total_fields = length + num_injected;
1086
1087 // The field array starts with tuples of shorts
1088 // [access, name index, sig index, initial value index, byte offset].
1089 // A generic signature slot only exists for field with generic
1090 // signature attribute. And the access flag is set with
1091 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1092 // signature slots are at the end of the field array and after all
1093 // other fields data.
1094 //
1095 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1096 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1097 // ...
1098 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1099 // [generic signature index]
1100 // [generic signature index]
1101 // ...
1102 //
1103 // Allocate a temporary resource array for field data. For each field,
1104 // a slot is reserved in the temporary array for the generic signature
1105 // index. After parsing all fields, the data are copied to a permanent
1106 // array and any unused slots will be discarded.
1107 ResourceMark rm(THREAD);
1108 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1109 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1110
1111 AnnotationArray* field_annotations = NULL;
1112 // The generic signature slots start after all other fields' data.
1113 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1114 int num_generic_signature = 0;
1115 for (int n = 0; n < length; n++) {
1116 cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count
1117
1118 AccessFlags access_flags;
1119 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1120 verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1121 access_flags.set_flags(flags);
1122
1123 u2 name_index = cfs->get_u2_fast();
1124 int cp_size = cp->length();
1125 check_property(
1126 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1127 "Invalid constant pool index %u for field name in class file %s",
1128 name_index, CHECK_NULL);
1129 Symbol* name = cp->symbol_at(name_index);
1130 verify_legal_field_name(name, CHECK_NULL);
1131
1132 u2 signature_index = cfs->get_u2_fast();
1133 check_property(
1134 valid_cp_range(signature_index, cp_size) &&
1135 cp->tag_at(signature_index).is_utf8(),
1136 "Invalid constant pool index %u for field signature in class file %s",
1137 signature_index, CHECK_NULL);
1138 Symbol* sig = cp->symbol_at(signature_index);
1139 verify_legal_field_signature(name, sig, CHECK_NULL);
1140
1141 u2 constantvalue_index = 0;
1142 bool is_synthetic = false;
1143 u2 generic_signature_index = 0;
1144 bool is_static = access_flags.is_static();
1145 FieldAnnotationCollector parsed_annotations;
1146
1147 u2 attributes_count = cfs->get_u2_fast();
1148 if (attributes_count > 0) {
1149 parse_field_attributes(loader_data,
1150 cp, attributes_count, is_static, signature_index,
1151 &constantvalue_index, &is_synthetic,
1152 &generic_signature_index, &field_annotations,
1153 &parsed_annotations,
1154 CHECK_NULL);
1155 if (field_annotations != NULL) {
1156 if (*fields_annotations == NULL) {
1157 *fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1158 loader_data, length, NULL,
1159 CHECK_NULL);
1160 }
1161 (*fields_annotations)->at_put(n, field_annotations);
1162 }
1163 if (is_synthetic) {
1164 access_flags.set_is_synthetic();
1165 }
1166 if (generic_signature_index != 0) {
1167 access_flags.set_field_has_generic_signature();
1168 fa[generic_signature_slot] = generic_signature_index;
1169 generic_signature_slot ++;
1170 num_generic_signature ++;
1171 }
1172 }
1173
1174 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1175 field->initialize(access_flags.as_short(),
1176 name_index,
1177 signature_index,
1178 constantvalue_index,
1179 0);
1180 if (parsed_annotations.has_any_annotations())
1181 parsed_annotations.apply_to(field);
1182
1183 BasicType type = cp->basic_type_for_signature_at(signature_index);
1184
1185 // Remember how many oops we encountered and compute allocation type
1186 FieldAllocationType atype = fac->update(is_static, type);
1187
1188 // The correct offset is computed later (all oop fields will be located together)
1189 // We temporarily store the allocation type in the offset field
1190 field->set_offset(atype);
1191 }
1192
1193 int index = length;
1194 if (num_injected != 0) {
1195 for (int n = 0; n < num_injected; n++) {
1196 // Check for duplicates
1197 if (injected[n].may_be_java) {
1198 Symbol* name = injected[n].name();
1199 Symbol* signature = injected[n].signature();
1200 bool duplicate = false;
1201 for (int i = 0; i < length; i++) {
1202 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1203 if (name == cp->symbol_at(f->name_index()) &&
1204 signature == cp->symbol_at(f->signature_index())) {
1205 // Symbol is desclared in Java so skip this one
1206 duplicate = true;
1207 break;
1208 }
1209 }
1210 if (duplicate) {
1211 // These will be removed from the field array at the end
1212 continue;
1213 }
1214 }
1215
1216 // Injected field
1217 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1218 field->initialize(JVM_ACC_FIELD_INTERNAL,
1219 injected[n].name_index,
1220 injected[n].signature_index,
1221 0,
1222 0);
1223
1224 BasicType type = FieldType::basic_type(injected[n].signature());
1225
1226 // Remember how many oops we encountered and compute allocation type
1227 FieldAllocationType atype = fac->update(false, type);
1228
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 index++;
1233 }
1234 }
1235
1236 // Now copy the fields' data from the temporary resource array.
1237 // Sometimes injected fields already exist in the Java source so
1238 // the fields array could be too long. In that case the
1239 // fields array is trimed. Also unused slots that were reserved
1240 // for generic signature indexes are discarded.
1241 Array<u2>* fields = MetadataFactory::new_array<u2>(
1242 loader_data, index * FieldInfo::field_slots + num_generic_signature,
1243 CHECK_NULL);
1244 {
1245 int i = 0;
1246 for (; i < index * FieldInfo::field_slots; i++) {
1247 fields->at_put(i, fa[i]);
1248 }
1249 for (int j = total_fields * FieldInfo::field_slots;
1250 j < generic_signature_slot; j++) {
1251 fields->at_put(i++, fa[j]);
1252 }
1253 assert(i == fields->length(), "");
1254 }
1255
1256 if (_need_verify && length > 1) {
1257 // Check duplicated fields
1258 ResourceMark rm(THREAD);
1259 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1260 THREAD, NameSigHash*, HASH_ROW_SIZE);
1261 initialize_hashtable(names_and_sigs);
1262 bool dup = false;
1263 {
1264 debug_only(No_Safepoint_Verifier nsv;)
1265 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1266 Symbol* name = fs.name();
1267 Symbol* sig = fs.signature();
1268 // If no duplicates, add name/signature in hashtable names_and_sigs.
1269 if (!put_after_lookup(name, sig, names_and_sigs)) {
1270 dup = true;
1271 break;
1272 }
1273 }
1274 }
1275 if (dup) {
1276 classfile_parse_error("Duplicate field name&signature in class file %s",
1277 CHECK_NULL);
1278 }
1279 }
1280
1281 return fields;
1282 }
1283
1284
1285 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1286 while (length-- > 0) {
1287 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1288 }
1289 }
1290
1291
1292 u2* ClassFileParser::parse_exception_table(ClassLoaderData* loader_data,
1293 u4 code_length,
1294 u4 exception_table_length,
1295 constantPoolHandle cp,
1296 TRAPS) {
1297 ClassFileStream* cfs = stream();
1298
1299 u2* exception_table_start = cfs->get_u2_buffer();
1300 assert(exception_table_start != NULL, "null exception table");
1301 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1302 // Will check legal target after parsing code array in verifier.
1303 if (_need_verify) {
1304 for (unsigned int i = 0; i < exception_table_length; i++) {
1305 u2 start_pc = cfs->get_u2_fast();
1306 u2 end_pc = cfs->get_u2_fast();
1307 u2 handler_pc = cfs->get_u2_fast();
1308 u2 catch_type_index = cfs->get_u2_fast();
1309 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1310 "Illegal exception table range in class file %s",
1311 CHECK_NULL);
1312 guarantee_property(handler_pc < code_length,
1313 "Illegal exception table handler in class file %s",
1314 CHECK_NULL);
1315 if (catch_type_index != 0) {
1316 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1317 is_klass_reference(cp, catch_type_index),
1318 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1319 }
1320 }
1321 } else {
1322 cfs->skip_u2_fast(exception_table_length * 4);
1323 }
1324 return exception_table_start;
1325 }
1326
1327 void ClassFileParser::parse_linenumber_table(
1328 u4 code_attribute_length, u4 code_length,
1329 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1330 ClassFileStream* cfs = stream();
1331 unsigned int num_entries = cfs->get_u2(CHECK);
1332
1333 // Each entry is a u2 start_pc, and a u2 line_number
1334 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1335
1336 // Verify line number attribute and table length
1337 check_property(
1338 code_attribute_length == sizeof(u2) + length_in_bytes,
1339 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1340
1341 cfs->guarantee_more(length_in_bytes, CHECK);
1342
1343 if ((*write_stream) == NULL) {
1344 if (length_in_bytes > fixed_buffer_size) {
1345 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1346 } else {
1347 (*write_stream) = new CompressedLineNumberWriteStream(
1348 linenumbertable_buffer, fixed_buffer_size);
1349 }
1350 }
1351
1352 while (num_entries-- > 0) {
1353 u2 bci = cfs->get_u2_fast(); // start_pc
1354 u2 line = cfs->get_u2_fast(); // line_number
1355 guarantee_property(bci < code_length,
1356 "Invalid pc in LineNumberTable in class file %s", CHECK);
1357 (*write_stream)->write_pair(bci, line);
1358 }
1359 }
1360
1361
1362 // Class file LocalVariableTable elements.
1363 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1364 public:
1365 u2 start_bci;
1366 u2 length;
1367 u2 name_cp_index;
1368 u2 descriptor_cp_index;
1369 u2 slot;
1370 };
1371
1372
1373 class LVT_Hash: public CHeapObj<mtClass> {
1374 public:
1375 LocalVariableTableElement *_elem; // element
1376 LVT_Hash* _next; // Next entry in hash table
1377 };
1378
1379 unsigned int hash(LocalVariableTableElement *elem) {
1380 unsigned int raw_hash = elem->start_bci;
1381
1382 raw_hash = elem->length + raw_hash * 37;
1383 raw_hash = elem->name_cp_index + raw_hash * 37;
1384 raw_hash = elem->slot + raw_hash * 37;
1385
1386 return raw_hash % HASH_ROW_SIZE;
1387 }
1388
1389 void initialize_hashtable(LVT_Hash** table) {
1390 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1391 table[i] = NULL;
1392 }
1393 }
1394
1395 void clear_hashtable(LVT_Hash** table) {
1396 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1397 LVT_Hash* current = table[i];
1398 LVT_Hash* next;
1399 while (current != NULL) {
1400 next = current->_next;
1401 current->_next = NULL;
1402 delete(current);
1403 current = next;
1404 }
1405 table[i] = NULL;
1406 }
1407 }
1408
1409 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1410 LVT_Hash* entry = table[index];
1411
1412 /*
1413 * 3-tuple start_bci/length/slot has to be unique key,
1414 * so the following comparison seems to be redundant:
1415 * && elem->name_cp_index == entry->_elem->name_cp_index
1416 */
1417 while (entry != NULL) {
1418 if (elem->start_bci == entry->_elem->start_bci
1419 && elem->length == entry->_elem->length
1420 && elem->name_cp_index == entry->_elem->name_cp_index
1421 && elem->slot == entry->_elem->slot
1422 ) {
1423 return entry;
1424 }
1425 entry = entry->_next;
1426 }
1427 return NULL;
1428 }
1429
1430 // Return false if the local variable is found in table.
1431 // Return true if no duplicate is found.
1432 // And local variable is added as a new entry in table.
1433 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1434 // First lookup for duplicates
1435 int index = hash(elem);
1436 LVT_Hash* entry = LVT_lookup(elem, index, table);
1437
1438 if (entry != NULL) {
1439 return false;
1440 }
1441 // No duplicate is found, allocate a new entry and fill it.
1442 if ((entry = new LVT_Hash()) == NULL) {
1443 return false;
1444 }
1445 entry->_elem = elem;
1446
1447 // Insert into hash table
1448 entry->_next = table[index];
1449 table[index] = entry;
1450
1451 return true;
1452 }
1453
1454 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1455 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1456 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1457 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1458 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1459 lvt->signature_cp_index = 0;
1460 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1461 }
1462
1463 // Function is used to parse both attributes:
1464 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1465 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1466 u2 max_locals,
1467 u4 code_attribute_length,
1468 constantPoolHandle cp,
1469 u2* localvariable_table_length,
1470 bool isLVTT,
1471 TRAPS) {
1472 ClassFileStream* cfs = stream();
1473 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1474 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1475 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1476 // Verify local variable table attribute has right length
1477 if (_need_verify) {
1478 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1479 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1480 }
1481 u2* localvariable_table_start = cfs->get_u2_buffer();
1482 assert(localvariable_table_start != NULL, "null local variable table");
1483 if (!_need_verify) {
1484 cfs->skip_u2_fast(size);
1485 } else {
1486 cfs->guarantee_more(size * 2, CHECK_NULL);
1487 for(int i = 0; i < (*localvariable_table_length); i++) {
1488 u2 start_pc = cfs->get_u2_fast();
1489 u2 length = cfs->get_u2_fast();
1490 u2 name_index = cfs->get_u2_fast();
1491 u2 descriptor_index = cfs->get_u2_fast();
1492 u2 index = cfs->get_u2_fast();
1493 // Assign to a u4 to avoid overflow
1494 u4 end_pc = (u4)start_pc + (u4)length;
1495
1496 if (start_pc >= code_length) {
1497 classfile_parse_error(
1498 "Invalid start_pc %u in %s in class file %s",
1499 start_pc, tbl_name, CHECK_NULL);
1500 }
1501 if (end_pc > code_length) {
1502 classfile_parse_error(
1503 "Invalid length %u in %s in class file %s",
1504 length, tbl_name, CHECK_NULL);
1505 }
1506 int cp_size = cp->length();
1507 guarantee_property(
1508 valid_cp_range(name_index, cp_size) &&
1509 cp->tag_at(name_index).is_utf8(),
1510 "Name index %u in %s has bad constant type in class file %s",
1511 name_index, tbl_name, CHECK_NULL);
1512 guarantee_property(
1513 valid_cp_range(descriptor_index, cp_size) &&
1514 cp->tag_at(descriptor_index).is_utf8(),
1515 "Signature index %u in %s has bad constant type in class file %s",
1516 descriptor_index, tbl_name, CHECK_NULL);
1517
1518 Symbol* name = cp->symbol_at(name_index);
1519 Symbol* sig = cp->symbol_at(descriptor_index);
1520 verify_legal_field_name(name, CHECK_NULL);
1521 u2 extra_slot = 0;
1522 if (!isLVTT) {
1523 verify_legal_field_signature(name, sig, CHECK_NULL);
1524
1525 // 4894874: check special cases for double and long local variables
1526 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1527 sig == vmSymbols::type_signature(T_LONG)) {
1528 extra_slot = 1;
1529 }
1530 }
1531 guarantee_property((index + extra_slot) < max_locals,
1532 "Invalid index %u in %s in class file %s",
1533 index, tbl_name, CHECK_NULL);
1534 }
1535 }
1536 return localvariable_table_start;
1537 }
1538
1539
1540 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1541 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1542 ClassFileStream* cfs = stream();
1543 u2 index = 0; // index in the array with long/double occupying two slots
1544 u4 i1 = *u1_index;
1545 u4 i2 = *u2_index + 1;
1546 for(int i = 0; i < array_length; i++) {
1547 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1548 index++;
1549 if (tag == ITEM_Long || tag == ITEM_Double) {
1550 index++;
1551 } else if (tag == ITEM_Object) {
1552 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1553 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1554 is_klass_reference(cp, class_index),
1555 "Bad class index %u in StackMap in class file %s",
1556 class_index, CHECK);
1557 } else if (tag == ITEM_Uninitialized) {
1558 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1559 guarantee_property(
1560 offset < code_length,
1561 "Bad uninitialized type offset %u in StackMap in class file %s",
1562 offset, CHECK);
1563 } else {
1564 guarantee_property(
1565 tag <= (u1)ITEM_Uninitialized,
1566 "Unknown variable type %u in StackMap in class file %s",
1567 tag, CHECK);
1568 }
1569 }
1570 u2_array[*u2_index] = index;
1571 *u1_index = i1;
1572 *u2_index = i2;
1573 }
1574
1575 Array<u1>* ClassFileParser::parse_stackmap_table(
1576 ClassLoaderData* loader_data,
1577 u4 code_attribute_length, TRAPS) {
1578 if (code_attribute_length == 0)
1579 return NULL;
1580
1581 ClassFileStream* cfs = stream();
1582 u1* stackmap_table_start = cfs->get_u1_buffer();
1583 assert(stackmap_table_start != NULL, "null stackmap table");
1584
1585 // check code_attribute_length first
1586 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1587
1588 if (!_need_verify && !DumpSharedSpaces) {
1589 return NULL;
1590 }
1591
1592 Array<u1>* stackmap_data =
1593 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL);
1594
1595 memcpy((void*)stackmap_data->adr_at(0),
1596 (void*)stackmap_table_start, code_attribute_length);
1597 return stackmap_data;
1598 }
1599
1600 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1601 u4 method_attribute_length,
1602 constantPoolHandle cp, TRAPS) {
1603 ClassFileStream* cfs = stream();
1604 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1605 *checked_exceptions_length = cfs->get_u2_fast();
1606 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1607 u2* checked_exceptions_start = cfs->get_u2_buffer();
1608 assert(checked_exceptions_start != NULL, "null checked exceptions");
1609 if (!_need_verify) {
1610 cfs->skip_u2_fast(size);
1611 } else {
1612 // Verify each value in the checked exception table
1613 u2 checked_exception;
1614 u2 len = *checked_exceptions_length;
1615 cfs->guarantee_more(2 * len, CHECK_NULL);
1616 for (int i = 0; i < len; i++) {
1617 checked_exception = cfs->get_u2_fast();
1618 check_property(
1619 valid_cp_range(checked_exception, cp->length()) &&
1620 is_klass_reference(cp, checked_exception),
1621 "Exception name has bad type at constant pool %u in class file %s",
1622 checked_exception, CHECK_NULL);
1623 }
1624 }
1625 // check exceptions attribute length
1626 if (_need_verify) {
1627 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1628 sizeof(u2) * size),
1629 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1630 }
1631 return checked_exceptions_start;
1632 }
1633
1634 void ClassFileParser::throwIllegalSignature(
1635 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1636 ResourceMark rm(THREAD);
1637 Exceptions::fthrow(THREAD_AND_LOCATION,
1638 vmSymbols::java_lang_ClassFormatError(),
1639 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1640 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1641 }
1642
1643 // Skip an annotation. Return >=limit if there is any problem.
1644 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1645 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1646 // value := switch (tag:u1) { ... }
1647 index += 2; // skip atype
1648 if ((index += 2) >= limit) return limit; // read nmem
1649 int nmem = Bytes::get_Java_u2(buffer+index-2);
1650 while (--nmem >= 0 && index < limit) {
1651 index += 2; // skip member
1652 index = skip_annotation_value(buffer, limit, index);
1653 }
1654 return index;
1655 }
1656
1657 // Skip an annotation value. Return >=limit if there is any problem.
1658 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1659 // value := switch (tag:u1) {
1660 // case B, C, I, S, Z, D, F, J, c: con:u2;
1661 // case e: e_class:u2 e_name:u2;
1662 // case s: s_con:u2;
1663 // case [: do(nval:u2) {value};
1664 // case @: annotation;
1665 // case s: s_con:u2;
1666 // }
1667 if ((index += 1) >= limit) return limit; // read tag
1668 u1 tag = buffer[index-1];
1669 switch (tag) {
1670 case 'B': case 'C': case 'I': case 'S': case 'Z':
1671 case 'D': case 'F': case 'J': case 'c': case 's':
1672 index += 2; // skip con or s_con
1673 break;
1674 case 'e':
1675 index += 4; // skip e_class, e_name
1676 break;
1677 case '[':
1678 {
1679 if ((index += 2) >= limit) return limit; // read nval
1680 int nval = Bytes::get_Java_u2(buffer+index-2);
1681 while (--nval >= 0 && index < limit) {
1682 index = skip_annotation_value(buffer, limit, index);
1683 }
1684 }
1685 break;
1686 case '@':
1687 index = skip_annotation(buffer, limit, index);
1688 break;
1689 default:
1690 assert(false, "annotation tag");
1691 return limit; // bad tag byte
1692 }
1693 return index;
1694 }
1695
1696 // Sift through annotations, looking for those significant to the VM:
1697 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1698 constantPoolHandle cp,
1699 ClassFileParser::AnnotationCollector* coll,
1700 TRAPS) {
1701 // annotations := do(nann:u2) {annotation}
1702 int index = 0;
1703 if ((index += 2) >= limit) return; // read nann
1704 int nann = Bytes::get_Java_u2(buffer+index-2);
1705 enum { // initial annotation layout
1706 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1707 count_off = 2, // u2 such as 1 (one value)
1708 member_off = 4, // utf8 such as 'value'
1709 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1710 e_tag_val = 'e',
1711 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1712 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1713 e_size = 11, // end of 'e' annotation
1714 c_tag_val = 'c',
1715 c_con_off = 7, // utf8 payload, such as 'I' or 'Ljava/lang/String;'
1716 c_size = 9, // end of 'c' annotation
1717 min_size = 6 // smallest possible size (zero members)
1718 };
1719 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1720 int index0 = index;
1721 index = skip_annotation(buffer, limit, index);
1722 u1* abase = buffer + index0;
1723 int atype = Bytes::get_Java_u2(abase + atype_off);
1724 int count = Bytes::get_Java_u2(abase + count_off);
1725 Symbol* aname = check_symbol_at(cp, atype);
1726 if (aname == NULL) break; // invalid annotation name
1727 Symbol* member = NULL;
1728 if (count >= 1) {
1729 int member_index = Bytes::get_Java_u2(abase + member_off);
1730 member = check_symbol_at(cp, member_index);
1731 if (member == NULL) break; // invalid member name
1732 }
1733
1734 // Here is where parsing particular annotations will take place.
1735 AnnotationCollector::ID id = coll->annotation_index(aname);
1736 if (id == AnnotationCollector::_unknown) continue;
1737 coll->set_annotation(id);
1738 // If there are no values, just set the bit and move on:
1739 if (count == 0) continue;
1740
1741 // For the record, here is how annotation payloads can be collected.
1742 // Suppose we want to capture @Retention.value. Here is how:
1743 //if (id == AnnotationCollector::_class_Retention) {
1744 // Symbol* payload = NULL;
1745 // if (count == 1
1746 // && e_size == (index0 - index) // match size
1747 // && e_tag_val == *(abase + tag_off)
1748 // && (check_symbol_at(cp, Bytes::get_Java_u2(abase + e_type_off))
1749 // == vmSymbols::RetentionPolicy_signature())
1750 // && member == vmSymbols::value_name()) {
1751 // payload = check_symbol_at(cp, Bytes::get_Java_u2(abase + e_con_off));
1752 // }
1753 // check_property(payload != NULL,
1754 // "Invalid @Retention annotation at offset %u in class file %s",
1755 // index0, CHECK);
1756 // if (payload != NULL) {
1757 // payload->increment_refcount();
1758 // coll->_class_RetentionPolicy = payload;
1759 // }
1760 //}
1761 }
1762 }
1763
1764 ClassFileParser::AnnotationCollector::ID ClassFileParser::AnnotationCollector::annotation_index(Symbol* name) {
1765 vmSymbols::SID sid = vmSymbols::find_sid(name);
1766 switch (sid) {
1767 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1768 if (_location != _in_method) break; // only allow for methods
1769 return _method_ForceInline;
1770 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1771 if (_location != _in_method) break; // only allow for methods
1772 return _method_DontInline;
1773 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1774 if (_location != _in_method) break; // only allow for methods
1775 return _method_LambdaForm_Compiled;
1776 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1777 if (_location != _in_method) break; // only allow for methods
1778 return _method_LambdaForm_Hidden;
1779 default: break;
1780 }
1781 return AnnotationCollector::_unknown;
1782 }
1783
1784 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1785 fatal("no field annotations yet");
1786 }
1787
1788 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1789 if (has_annotation(_method_ForceInline))
1790 m->set_force_inline(true);
1791 if (has_annotation(_method_DontInline))
1792 m->set_dont_inline(true);
1793 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1794 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1795 if (has_annotation(_method_LambdaForm_Hidden))
1796 m->set_hidden(true);
1797 }
1798
1799 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1800 fatal("no class annotations yet");
1801 }
1802
1803
1804 #define MAX_ARGS_SIZE 255
1805 #define MAX_CODE_SIZE 65535
1806 #define INITIAL_MAX_LVT_NUMBER 256
1807
1808 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1809 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1810 // Method* to save footprint, so we only know the size of the resulting Method* when the
1811 // entire method attribute is parsed.
1812 //
1813 // The promoted_flags parameter is used to pass relevant access_flags
1814 // from the method back up to the containing klass. These flag values
1815 // are added to klass's access_flags.
1816
1817 methodHandle ClassFileParser::parse_method(ClassLoaderData* loader_data,
1818 constantPoolHandle cp,
1819 bool is_interface,
1820 AccessFlags *promoted_flags,
1821 AnnotationArray** method_annotations,
1822 AnnotationArray** method_parameter_annotations,
1823 AnnotationArray** method_default_annotations,
1824 TRAPS) {
1825 ClassFileStream* cfs = stream();
1826 methodHandle nullHandle;
1827 ResourceMark rm(THREAD);
1828 // Parse fixed parts
1829 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1830
1831 int flags = cfs->get_u2_fast();
1832 u2 name_index = cfs->get_u2_fast();
1833 int cp_size = cp->length();
1834 check_property(
1835 valid_cp_range(name_index, cp_size) &&
1836 cp->tag_at(name_index).is_utf8(),
1837 "Illegal constant pool index %u for method name in class file %s",
1838 name_index, CHECK_(nullHandle));
1839 Symbol* name = cp->symbol_at(name_index);
1840 verify_legal_method_name(name, CHECK_(nullHandle));
1841
1842 u2 signature_index = cfs->get_u2_fast();
1843 guarantee_property(
1844 valid_cp_range(signature_index, cp_size) &&
1845 cp->tag_at(signature_index).is_utf8(),
1846 "Illegal constant pool index %u for method signature in class file %s",
1847 signature_index, CHECK_(nullHandle));
1848 Symbol* signature = cp->symbol_at(signature_index);
1849
1850 AccessFlags access_flags;
1851 if (name == vmSymbols::class_initializer_name()) {
1852 // We ignore the other access flags for a valid class initializer.
1853 // (JVM Spec 2nd ed., chapter 4.6)
1854 if (_major_version < 51) { // backward compatibility
1855 flags = JVM_ACC_STATIC;
1856 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1857 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1858 }
1859 } else {
1860 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1861 }
1862
1863 int args_size = -1; // only used when _need_verify is true
1864 if (_need_verify) {
1865 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1866 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1867 if (args_size > MAX_ARGS_SIZE) {
1868 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1869 }
1870 }
1871
1872 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1873
1874 // Default values for code and exceptions attribute elements
1875 u2 max_stack = 0;
1876 u2 max_locals = 0;
1877 u4 code_length = 0;
1878 u1* code_start = 0;
1879 u2 exception_table_length = 0;
1880 u2* exception_table_start = NULL;
1881 Array<int>* exception_handlers = Universe::the_empty_int_array();
1882 u2 checked_exceptions_length = 0;
1883 u2* checked_exceptions_start = NULL;
1884 CompressedLineNumberWriteStream* linenumber_table = NULL;
1885 int linenumber_table_length = 0;
1886 int total_lvt_length = 0;
1887 u2 lvt_cnt = 0;
1888 u2 lvtt_cnt = 0;
1889 bool lvt_allocated = false;
1890 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1891 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1892 u2* localvariable_table_length;
1893 u2** localvariable_table_start;
1894 u2* localvariable_type_table_length;
1895 u2** localvariable_type_table_start;
1896 bool parsed_code_attribute = false;
1897 bool parsed_checked_exceptions_attribute = false;
1898 bool parsed_stackmap_attribute = false;
1899 // stackmap attribute - JDK1.5
1900 Array<u1>* stackmap_data = NULL;
1901 u2 generic_signature_index = 0;
1902 MethodAnnotationCollector parsed_annotations;
1903 u1* runtime_visible_annotations = NULL;
1904 int runtime_visible_annotations_length = 0;
1905 u1* runtime_invisible_annotations = NULL;
1906 int runtime_invisible_annotations_length = 0;
1907 u1* runtime_visible_parameter_annotations = NULL;
1908 int runtime_visible_parameter_annotations_length = 0;
1909 u1* runtime_invisible_parameter_annotations = NULL;
1910 int runtime_invisible_parameter_annotations_length = 0;
1911 u1* annotation_default = NULL;
1912 int annotation_default_length = 0;
1913
1914 // Parse code and exceptions attribute
1915 u2 method_attributes_count = cfs->get_u2_fast();
1916 while (method_attributes_count--) {
1917 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1918 u2 method_attribute_name_index = cfs->get_u2_fast();
1919 u4 method_attribute_length = cfs->get_u4_fast();
1920 check_property(
1921 valid_cp_range(method_attribute_name_index, cp_size) &&
1922 cp->tag_at(method_attribute_name_index).is_utf8(),
1923 "Invalid method attribute name index %u in class file %s",
1924 method_attribute_name_index, CHECK_(nullHandle));
1925
1926 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1927 if (method_attribute_name == vmSymbols::tag_code()) {
1928 // Parse Code attribute
1929 if (_need_verify) {
1930 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1931 "Code attribute in native or abstract methods in class file %s",
1932 CHECK_(nullHandle));
1933 }
1934 if (parsed_code_attribute) {
1935 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1936 }
1937 parsed_code_attribute = true;
1938
1939 // Stack size, locals size, and code size
1940 if (_major_version == 45 && _minor_version <= 2) {
1941 cfs->guarantee_more(4, CHECK_(nullHandle));
1942 max_stack = cfs->get_u1_fast();
1943 max_locals = cfs->get_u1_fast();
1944 code_length = cfs->get_u2_fast();
1945 } else {
1946 cfs->guarantee_more(8, CHECK_(nullHandle));
1947 max_stack = cfs->get_u2_fast();
1948 max_locals = cfs->get_u2_fast();
1949 code_length = cfs->get_u4_fast();
1950 }
1951 if (_need_verify) {
1952 guarantee_property(args_size <= max_locals,
1953 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1954 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1955 "Invalid method Code length %u in class file %s",
1956 code_length, CHECK_(nullHandle));
1957 }
1958 // Code pointer
1959 code_start = cfs->get_u1_buffer();
1960 assert(code_start != NULL, "null code start");
1961 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1962 cfs->skip_u1_fast(code_length);
1963
1964 // Exception handler table
1965 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1966 exception_table_length = cfs->get_u2_fast();
1967 if (exception_table_length > 0) {
1968 exception_table_start =
1969 parse_exception_table(loader_data, code_length, exception_table_length, cp, CHECK_(nullHandle));
1970 }
1971
1972 // Parse additional attributes in code attribute
1973 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1974 u2 code_attributes_count = cfs->get_u2_fast();
1975
1976 unsigned int calculated_attribute_length = 0;
1977
1978 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1979 calculated_attribute_length =
1980 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1981 } else {
1982 // max_stack, locals and length are smaller in pre-version 45.2 classes
1983 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1984 }
1985 calculated_attribute_length +=
1986 code_length +
1987 sizeof(exception_table_length) +
1988 sizeof(code_attributes_count) +
1989 exception_table_length *
1990 ( sizeof(u2) + // start_pc
1991 sizeof(u2) + // end_pc
1992 sizeof(u2) + // handler_pc
1993 sizeof(u2) ); // catch_type_index
1994
1995 while (code_attributes_count--) {
1996 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1997 u2 code_attribute_name_index = cfs->get_u2_fast();
1998 u4 code_attribute_length = cfs->get_u4_fast();
1999 calculated_attribute_length += code_attribute_length +
2000 sizeof(code_attribute_name_index) +
2001 sizeof(code_attribute_length);
2002 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
2003 cp->tag_at(code_attribute_name_index).is_utf8(),
2004 "Invalid code attribute name index %u in class file %s",
2005 code_attribute_name_index,
2006 CHECK_(nullHandle));
2007 if (LoadLineNumberTables &&
2008 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2009 // Parse and compress line number table
2010 parse_linenumber_table(code_attribute_length, code_length,
2011 &linenumber_table, CHECK_(nullHandle));
2012
2013 } else if (LoadLocalVariableTables &&
2014 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2015 // Parse local variable table
2016 if (!lvt_allocated) {
2017 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2018 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2019 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2020 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2021 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2022 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2023 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2024 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2025 lvt_allocated = true;
2026 }
2027 if (lvt_cnt == max_lvt_cnt) {
2028 max_lvt_cnt <<= 1;
2029 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2030 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2031 }
2032 localvariable_table_start[lvt_cnt] =
2033 parse_localvariable_table(code_length,
2034 max_locals,
2035 code_attribute_length,
2036 cp,
2037 &localvariable_table_length[lvt_cnt],
2038 false, // is not LVTT
2039 CHECK_(nullHandle));
2040 total_lvt_length += localvariable_table_length[lvt_cnt];
2041 lvt_cnt++;
2042 } else if (LoadLocalVariableTypeTables &&
2043 _major_version >= JAVA_1_5_VERSION &&
2044 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2045 if (!lvt_allocated) {
2046 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2047 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2048 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2049 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2050 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2051 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2052 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2053 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2054 lvt_allocated = true;
2055 }
2056 // Parse local variable type table
2057 if (lvtt_cnt == max_lvtt_cnt) {
2058 max_lvtt_cnt <<= 1;
2059 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2060 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2061 }
2062 localvariable_type_table_start[lvtt_cnt] =
2063 parse_localvariable_table(code_length,
2064 max_locals,
2065 code_attribute_length,
2066 cp,
2067 &localvariable_type_table_length[lvtt_cnt],
2068 true, // is LVTT
2069 CHECK_(nullHandle));
2070 lvtt_cnt++;
2071 } else if (UseSplitVerifier &&
2072 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2073 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2074 // Stack map is only needed by the new verifier in JDK1.5.
2075 if (parsed_stackmap_attribute) {
2076 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2077 }
2078 stackmap_data = parse_stackmap_table(loader_data, code_attribute_length, CHECK_(nullHandle));
2079 parsed_stackmap_attribute = true;
2080 } else {
2081 // Skip unknown attributes
2082 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2083 }
2084 }
2085 // check method attribute length
2086 if (_need_verify) {
2087 guarantee_property(method_attribute_length == calculated_attribute_length,
2088 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2089 }
2090 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2091 // Parse Exceptions attribute
2092 if (parsed_checked_exceptions_attribute) {
2093 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2094 }
2095 parsed_checked_exceptions_attribute = true;
2096 checked_exceptions_start =
2097 parse_checked_exceptions(&checked_exceptions_length,
2098 method_attribute_length,
2099 cp, CHECK_(nullHandle));
2100 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2101 if (method_attribute_length != 0) {
2102 classfile_parse_error(
2103 "Invalid Synthetic method attribute length %u in class file %s",
2104 method_attribute_length, CHECK_(nullHandle));
2105 }
2106 // Should we check that there hasn't already been a synthetic attribute?
2107 access_flags.set_is_synthetic();
2108 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2109 if (method_attribute_length != 0) {
2110 classfile_parse_error(
2111 "Invalid Deprecated method attribute length %u in class file %s",
2112 method_attribute_length, CHECK_(nullHandle));
2113 }
2114 } else if (_major_version >= JAVA_1_5_VERSION) {
2115 if (method_attribute_name == vmSymbols::tag_signature()) {
2116 if (method_attribute_length != 2) {
2117 classfile_parse_error(
2118 "Invalid Signature attribute length %u in class file %s",
2119 method_attribute_length, CHECK_(nullHandle));
2120 }
2121 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
2122 generic_signature_index = cfs->get_u2_fast();
2123 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2124 runtime_visible_annotations_length = method_attribute_length;
2125 runtime_visible_annotations = cfs->get_u1_buffer();
2126 assert(runtime_visible_annotations != NULL, "null visible annotations");
2127 parse_annotations(runtime_visible_annotations, runtime_visible_annotations_length, cp, &parsed_annotations, CHECK_(nullHandle));
2128 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2129 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2130 runtime_invisible_annotations_length = method_attribute_length;
2131 runtime_invisible_annotations = cfs->get_u1_buffer();
2132 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2133 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
2134 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2135 runtime_visible_parameter_annotations_length = method_attribute_length;
2136 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2137 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2138 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2139 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2140 runtime_invisible_parameter_annotations_length = method_attribute_length;
2141 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2142 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2143 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
2144 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2145 annotation_default_length = method_attribute_length;
2146 annotation_default = cfs->get_u1_buffer();
2147 assert(annotation_default != NULL, "null annotation default");
2148 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2149 } else {
2150 // Skip unknown attributes
2151 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2152 }
2153 } else {
2154 // Skip unknown attributes
2155 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2156 }
2157 }
2158
2159 if (linenumber_table != NULL) {
2160 linenumber_table->write_terminator();
2161 linenumber_table_length = linenumber_table->position();
2162 }
2163
2164 // Make sure there's at least one Code attribute in non-native/non-abstract method
2165 if (_need_verify) {
2166 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2167 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2168 }
2169
2170 // All sizing information for a Method* is finally available, now create it
2171 Method* m = Method::allocate(loader_data,
2172 code_length,
2173 access_flags,
2174 linenumber_table_length,
2175 total_lvt_length,
2176 exception_table_length,
2177 checked_exceptions_length,
2178 CHECK_(nullHandle));
2179
2180 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2181
2182 // Fill in information from fixed part (access_flags already set)
2183 m->set_constants(cp());
2184 m->set_name_index(name_index);
2185 m->set_signature_index(signature_index);
2186 m->set_generic_signature_index(generic_signature_index);
2187 #ifdef CC_INTERP
2188 // hmm is there a gc issue here??
2189 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2190 m->set_result_index(rtf.type());
2191 #endif
2192
2193 if (args_size >= 0) {
2194 m->set_size_of_parameters(args_size);
2195 } else {
2196 m->compute_size_of_parameters(THREAD);
2197 }
2198 #ifdef ASSERT
2199 if (args_size >= 0) {
2200 m->compute_size_of_parameters(THREAD);
2201 assert(args_size == m->size_of_parameters(), "");
2202 }
2203 #endif
2204
2205 // Fill in code attribute information
2206 m->set_max_stack(max_stack);
2207 m->set_max_locals(max_locals);
2208
2209 m->constMethod()->set_stackmap_data(stackmap_data);
2210
2211 // Copy byte codes
2212 m->set_code(code_start);
2213
2214 // Copy line number table
2215 if (linenumber_table != NULL) {
2216 memcpy(m->compressed_linenumber_table(),
2217 linenumber_table->buffer(), linenumber_table_length);
2218 }
2219
2220 // Copy exception table
2221 if (exception_table_length > 0) {
2222 int size =
2223 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2224 copy_u2_with_conversion((u2*) m->exception_table_start(),
2225 exception_table_start, size);
2226 }
2227
2228 // Copy checked exceptions
2229 if (checked_exceptions_length > 0) {
2230 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2231 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2232 }
2233
2234 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2235 *
2236 * Rules for LVT's and LVTT's are:
2237 * - There can be any number of LVT's and LVTT's.
2238 * - If there are n LVT's, it is the same as if there was just
2239 * one LVT containing all the entries from the n LVT's.
2240 * - There may be no more than one LVT entry per local variable.
2241 * Two LVT entries are 'equal' if these fields are the same:
2242 * start_pc, length, name, slot
2243 * - There may be no more than one LVTT entry per each LVT entry.
2244 * Each LVTT entry has to match some LVT entry.
2245 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2246 */
2247 if (total_lvt_length > 0) {
2248 int tbl_no, idx;
2249
2250 promoted_flags->set_has_localvariable_table();
2251
2252 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2253 initialize_hashtable(lvt_Hash);
2254
2255 // To fill LocalVariableTable in
2256 Classfile_LVT_Element* cf_lvt;
2257 LocalVariableTableElement* lvt = m->localvariable_table_start();
2258
2259 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2260 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2261 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2262 copy_lvt_element(&cf_lvt[idx], lvt);
2263 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2264 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2265 && _need_verify
2266 && _major_version >= JAVA_1_5_VERSION ) {
2267 clear_hashtable(lvt_Hash);
2268 classfile_parse_error("Duplicated LocalVariableTable attribute "
2269 "entry for '%s' in class file %s",
2270 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2271 CHECK_(nullHandle));
2272 }
2273 }
2274 }
2275
2276 // To merge LocalVariableTable and LocalVariableTypeTable
2277 Classfile_LVT_Element* cf_lvtt;
2278 LocalVariableTableElement lvtt_elem;
2279
2280 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2281 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2282 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2283 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2284 int index = hash(&lvtt_elem);
2285 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2286 if (entry == NULL) {
2287 if (_need_verify) {
2288 clear_hashtable(lvt_Hash);
2289 classfile_parse_error("LVTT entry for '%s' in class file %s "
2290 "does not match any LVT entry",
2291 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2292 CHECK_(nullHandle));
2293 }
2294 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2295 clear_hashtable(lvt_Hash);
2296 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2297 "entry for '%s' in class file %s",
2298 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2299 CHECK_(nullHandle));
2300 } else {
2301 // to add generic signatures into LocalVariableTable
2302 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2303 }
2304 }
2305 }
2306 clear_hashtable(lvt_Hash);
2307 }
2308
2309 if (parsed_annotations.has_any_annotations())
2310 parsed_annotations.apply_to(m);
2311 *method_annotations = assemble_annotations(loader_data,
2312 runtime_visible_annotations,
2313 runtime_visible_annotations_length,
2314 runtime_invisible_annotations,
2315 runtime_invisible_annotations_length,
2316 CHECK_(nullHandle));
2317 *method_parameter_annotations = assemble_annotations(loader_data,
2318 runtime_visible_parameter_annotations,
2319 runtime_visible_parameter_annotations_length,
2320 runtime_invisible_parameter_annotations,
2321 runtime_invisible_parameter_annotations_length,
2322 CHECK_(nullHandle));
2323 *method_default_annotations = assemble_annotations(loader_data,
2324 annotation_default,
2325 annotation_default_length,
2326 NULL,
2327 0,
2328 CHECK_(nullHandle));
2329
2330 if (name == vmSymbols::finalize_method_name() &&
2331 signature == vmSymbols::void_method_signature()) {
2332 if (m->is_empty_method()) {
2333 _has_empty_finalizer = true;
2334 } else {
2335 _has_finalizer = true;
2336 }
2337 }
2338 if (name == vmSymbols::object_initializer_name() &&
2339 signature == vmSymbols::void_method_signature() &&
2340 m->is_vanilla_constructor()) {
2341 _has_vanilla_constructor = true;
2342 }
2343
2344 return m;
2345 }
2346
2347
2348 // The promoted_flags parameter is used to pass relevant access_flags
2349 // from the methods back up to the containing klass. These flag values
2350 // are added to klass's access_flags.
2351
2352 Array<Method*>* ClassFileParser::parse_methods(ClassLoaderData* loader_data,
2353 constantPoolHandle cp,
2354 bool is_interface,
2355 AccessFlags* promoted_flags,
2356 bool* has_final_method,
2357 Array<AnnotationArray*>** methods_annotations,
2358 Array<AnnotationArray*>** methods_parameter_annotations,
2359 Array<AnnotationArray*>** methods_default_annotations,
2360 TRAPS) {
2361 ClassFileStream* cfs = stream();
2362 AnnotationArray* method_annotations = NULL;
2363 AnnotationArray* method_parameter_annotations = NULL;
2364 AnnotationArray* method_default_annotations = NULL;
2365 cfs->guarantee_more(2, CHECK_NULL); // length
2366 u2 length = cfs->get_u2_fast();
2367 if (length == 0) {
2368 return Universe::the_empty_method_array();
2369 } else {
2370 // FIXME: Handle leaks at later failures.
2371 Array<Method*>* methods = MetadataFactory::new_array<Method*>(loader_data, length, NULL, CHECK_NULL);
2372
2373 HandleMark hm(THREAD);
2374 for (int index = 0; index < length; index++) {
2375 methodHandle method = parse_method(loader_data,
2376 cp, is_interface,
2377 promoted_flags,
2378 &method_annotations,
2379 &method_parameter_annotations,
2380 &method_default_annotations,
2381 CHECK_NULL);
2382
2383 if (method->is_final()) {
2384 *has_final_method = true;
2385 }
2386 methods->at_put(index, method());
2387 if (*methods_annotations == NULL) {
2388 *methods_annotations =
2389 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2390 }
2391 (*methods_annotations)->at_put(index, method_annotations);
2392 if (*methods_parameter_annotations == NULL) {
2393 *methods_parameter_annotations =
2394 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2395 }
2396 (*methods_parameter_annotations)->at_put(index, method_parameter_annotations);
2397 if (*methods_default_annotations == NULL) {
2398 *methods_default_annotations =
2399 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2400 }
2401 (*methods_default_annotations)->at_put(index, method_default_annotations);
2402 }
2403 if (_need_verify && length > 1) {
2404 // Check duplicated methods
2405 ResourceMark rm(THREAD);
2406 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2407 THREAD, NameSigHash*, HASH_ROW_SIZE);
2408 initialize_hashtable(names_and_sigs);
2409 bool dup = false;
2410 {
2411 debug_only(No_Safepoint_Verifier nsv;)
2412 for (int i = 0; i < length; i++) {
2413 Method* m = methods->at(i);
2414 // If no duplicates, add name/signature in hashtable names_and_sigs.
2415 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2416 dup = true;
2417 break;
2418 }
2419 }
2420 }
2421 if (dup) {
2422 classfile_parse_error("Duplicate method name&signature in class file %s",
2423 CHECK_NULL);
2424 }
2425 }
2426 return methods;
2427 }
2428 }
2429
2430
2431 Array<int>* ClassFileParser::sort_methods(ClassLoaderData* loader_data,
2432 Array<Method*>* methods,
2433 Array<AnnotationArray*>* methods_annotations,
2434 Array<AnnotationArray*>* methods_parameter_annotations,
2435 Array<AnnotationArray*>* methods_default_annotations,
2436 TRAPS) {
2437 int length = methods->length();
2438 // If JVMTI original method ordering or sharing is enabled we have to
2439 // remember the original class file ordering.
2440 // We temporarily use the vtable_index field in the Method* to store the
2441 // class file index, so we can read in after calling qsort.
2442 // Put the method ordering in the shared archive.
2443 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2444 for (int index = 0; index < length; index++) {
2445 Method* m = methods->at(index);
2446 assert(!m->valid_vtable_index(), "vtable index should not be set");
2447 m->set_vtable_index(index);
2448 }
2449 }
2450 // Sort method array by ascending method name (for faster lookups & vtable construction)
2451 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2452 Method::sort_methods(methods,
2453 methods_annotations,
2454 methods_parameter_annotations,
2455 methods_default_annotations);
2456
2457 // If JVMTI original method ordering or sharing is enabled construct int
2458 // array remembering the original ordering
2459 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2460 Array<int>* method_ordering = MetadataFactory::new_array<int>(loader_data, length, CHECK_NULL);
2461 for (int index = 0; index < length; index++) {
2462 Method* m = methods->at(index);
2463 int old_index = m->vtable_index();
2464 assert(old_index >= 0 && old_index < length, "invalid method index");
2465 method_ordering->at_put(index, old_index);
2466 m->set_vtable_index(Method::invalid_vtable_index);
2467 }
2468 return method_ordering;
2469 } else {
2470 return Universe::the_empty_int_array();
2471 }
2472 }
2473
2474
2475 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS) {
2476 ClassFileStream* cfs = stream();
2477 cfs->guarantee_more(2, CHECK); // sourcefile_index
2478 u2 sourcefile_index = cfs->get_u2_fast();
2479 check_property(
2480 valid_cp_range(sourcefile_index, cp->length()) &&
2481 cp->tag_at(sourcefile_index).is_utf8(),
2482 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2483 sourcefile_index, CHECK);
2484 set_class_sourcefile(cp->symbol_at(sourcefile_index));
2485 }
2486
2487
2488
2489 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2490 int length, TRAPS) {
2491 ClassFileStream* cfs = stream();
2492 u1* sde_buffer = cfs->get_u1_buffer();
2493 assert(sde_buffer != NULL, "null sde buffer");
2494
2495 // Don't bother storing it if there is no way to retrieve it
2496 if (JvmtiExport::can_get_source_debug_extension()) {
2497 assert((length+1) > length, "Overflow checking");
2498 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2499 for (int i = 0; i < length; i++) {
2500 sde[i] = sde_buffer[i];
2501 }
2502 sde[length] = '\0';
2503 set_class_sde_buffer((char*)sde, length);
2504 }
2505 // Got utf8 string, set stream position forward
2506 cfs->skip_u1(length, CHECK);
2507 }
2508
2509
2510 // Inner classes can be static, private or protected (classic VM does this)
2511 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2512
2513 // Return number of classes in the inner classes attribute table
2514 u2 ClassFileParser::parse_classfile_inner_classes_attribute(ClassLoaderData* loader_data,
2515 u1* inner_classes_attribute_start,
2516 bool parsed_enclosingmethod_attribute,
2517 u2 enclosing_method_class_index,
2518 u2 enclosing_method_method_index,
2519 constantPoolHandle cp,
2520 TRAPS) {
2521 ClassFileStream* cfs = stream();
2522 u1* current_mark = cfs->current();
2523 u2 length = 0;
2524 if (inner_classes_attribute_start != NULL) {
2525 cfs->set_current(inner_classes_attribute_start);
2526 cfs->guarantee_more(2, CHECK_0); // length
2527 length = cfs->get_u2_fast();
2528 }
2529
2530 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2531 // method data:
2532 // [inner_class_info_index,
2533 // outer_class_info_index,
2534 // inner_name_index,
2535 // inner_class_access_flags,
2536 // ...
2537 // enclosing_method_class_index,
2538 // enclosing_method_method_index]
2539 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2540 // FIXME: Will leak on exceptions.
2541 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(loader_data, size, CHECK_0);
2542 int index = 0;
2543 int cp_size = cp->length();
2544 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2545 for (int n = 0; n < length; n++) {
2546 // Inner class index
2547 u2 inner_class_info_index = cfs->get_u2_fast();
2548 check_property(
2549 inner_class_info_index == 0 ||
2550 (valid_cp_range(inner_class_info_index, cp_size) &&
2551 is_klass_reference(cp, inner_class_info_index)),
2552 "inner_class_info_index %u has bad constant type in class file %s",
2553 inner_class_info_index, CHECK_0);
2554 // Outer class index
2555 u2 outer_class_info_index = cfs->get_u2_fast();
2556 check_property(
2557 outer_class_info_index == 0 ||
2558 (valid_cp_range(outer_class_info_index, cp_size) &&
2559 is_klass_reference(cp, outer_class_info_index)),
2560 "outer_class_info_index %u has bad constant type in class file %s",
2561 outer_class_info_index, CHECK_0);
2562 // Inner class name
2563 u2 inner_name_index = cfs->get_u2_fast();
2564 check_property(
2565 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2566 cp->tag_at(inner_name_index).is_utf8()),
2567 "inner_name_index %u has bad constant type in class file %s",
2568 inner_name_index, CHECK_0);
2569 if (_need_verify) {
2570 guarantee_property(inner_class_info_index != outer_class_info_index,
2571 "Class is both outer and inner class in class file %s", CHECK_0);
2572 }
2573 // Access flags
2574 AccessFlags inner_access_flags;
2575 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2576 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2577 // Set abstract bit for old class files for backward compatibility
2578 flags |= JVM_ACC_ABSTRACT;
2579 }
2580 verify_legal_class_modifiers(flags, CHECK_0);
2581 inner_access_flags.set_flags(flags);
2582
2583 inner_classes->at_put(index++, inner_class_info_index);
2584 inner_classes->at_put(index++, outer_class_info_index);
2585 inner_classes->at_put(index++, inner_name_index);
2586 inner_classes->at_put(index++, inner_access_flags.as_short());
2587 }
2588
2589 // 4347400: make sure there's no duplicate entry in the classes array
2590 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2591 for(int i = 0; i < length * 4; i += 4) {
2592 for(int j = i + 4; j < length * 4; j += 4) {
2593 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2594 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2595 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2596 inner_classes->at(i+3) != inner_classes->at(j+3)),
2597 "Duplicate entry in InnerClasses in class file %s",
2598 CHECK_0);
2599 }
2600 }
2601 }
2602
2603 // Set EnclosingMethod class and method indexes.
2604 if (parsed_enclosingmethod_attribute) {
2605 inner_classes->at_put(index++, enclosing_method_class_index);
2606 inner_classes->at_put(index++, enclosing_method_method_index);
2607 }
2608 assert(index == size, "wrong size");
2609
2610 // Update InstanceKlass with inner class info.
2611 set_class_inner_classes(inner_classes);
2612
2613 // Restore buffer's current position.
2614 cfs->set_current(current_mark);
2615
2616 return length;
2617 }
2618
2619 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS) {
2620 set_class_synthetic_flag(true);
2621 }
2622
2623 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS) {
2624 ClassFileStream* cfs = stream();
2625 u2 signature_index = cfs->get_u2(CHECK);
2626 check_property(
2627 valid_cp_range(signature_index, cp->length()) &&
2628 cp->tag_at(signature_index).is_utf8(),
2629 "Invalid constant pool index %u in Signature attribute in class file %s",
2630 signature_index, CHECK);
2631 set_class_generic_signature(cp->symbol_at(signature_index));
2632 }
2633
2634 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(ClassLoaderData* loader_data,
2635 constantPoolHandle cp,
2636 u4 attribute_byte_length, TRAPS) {
2637 ClassFileStream* cfs = stream();
2638 u1* current_start = cfs->current();
2639
2640 cfs->guarantee_more(2, CHECK); // length
2641 int attribute_array_length = cfs->get_u2_fast();
2642
2643 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2644 "Short length on BootstrapMethods in class file %s",
2645 CHECK);
2646
2647 // The attribute contains a counted array of counted tuples of shorts,
2648 // represending bootstrap specifiers:
2649 // length*{bootstrap_method_index, argument_count*{argument_index}}
2650 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2651 // operand_count = number of shorts in attr, except for leading length
2652
2653 // The attribute is copied into a short[] array.
2654 // The array begins with a series of short[2] pairs, one for each tuple.
2655 int index_size = (attribute_array_length * 2);
2656
2657 Array<u2>* operands = MetadataFactory::new_array<u2>(loader_data, index_size + operand_count, CHECK);
2658
2659 int operand_fill_index = index_size;
2660 int cp_size = cp->length();
2661
2662 for (int n = 0; n < attribute_array_length; n++) {
2663 // Store a 32-bit offset into the header of the operand array.
2664 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2665
2666 // Read a bootstrap specifier.
2667 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2668 u2 bootstrap_method_index = cfs->get_u2_fast();
2669 u2 argument_count = cfs->get_u2_fast();
2670 check_property(
2671 valid_cp_range(bootstrap_method_index, cp_size) &&
2672 cp->tag_at(bootstrap_method_index).is_method_handle(),
2673 "bootstrap_method_index %u has bad constant type in class file %s",
2674 bootstrap_method_index,
2675 CHECK);
2676 operands->at_put(operand_fill_index++, bootstrap_method_index);
2677 operands->at_put(operand_fill_index++, argument_count);
2678
2679 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2680 for (int j = 0; j < argument_count; j++) {
2681 u2 argument_index = cfs->get_u2_fast();
2682 check_property(
2683 valid_cp_range(argument_index, cp_size) &&
2684 cp->tag_at(argument_index).is_loadable_constant(),
2685 "argument_index %u has bad constant type in class file %s",
2686 argument_index,
2687 CHECK);
2688 operands->at_put(operand_fill_index++, argument_index);
2689 }
2690 }
2691
2692 assert(operand_fill_index == operands->length(), "exact fill");
2693 assert(ConstantPool::operand_array_length(operands) == attribute_array_length, "correct decode");
2694
2695 u1* current_end = cfs->current();
2696 guarantee_property(current_end == current_start + attribute_byte_length,
2697 "Bad length on BootstrapMethods in class file %s",
2698 CHECK);
2699
2700 cp->set_operands(operands);
2701 }
2702
2703 void ClassFileParser::parse_classfile_attributes(ClassLoaderData* loader_data,
2704 constantPoolHandle cp,
2705 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2706 TRAPS) {
2707 ClassFileStream* cfs = stream();
2708 // Set inner classes attribute to default sentinel
2709 set_class_inner_classes(Universe::the_empty_short_array());
2710 cfs->guarantee_more(2, CHECK); // attributes_count
2711 u2 attributes_count = cfs->get_u2_fast();
2712 bool parsed_sourcefile_attribute = false;
2713 bool parsed_innerclasses_attribute = false;
2714 bool parsed_enclosingmethod_attribute = false;
2715 bool parsed_bootstrap_methods_attribute = false;
2716 u1* runtime_visible_annotations = NULL;
2717 int runtime_visible_annotations_length = 0;
2718 u1* runtime_invisible_annotations = NULL;
2719 int runtime_invisible_annotations_length = 0;
2720 u1* inner_classes_attribute_start = NULL;
2721 u4 inner_classes_attribute_length = 0;
2722 u2 enclosing_method_class_index = 0;
2723 u2 enclosing_method_method_index = 0;
2724 // Iterate over attributes
2725 while (attributes_count--) {
2726 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2727 u2 attribute_name_index = cfs->get_u2_fast();
2728 u4 attribute_length = cfs->get_u4_fast();
2729 check_property(
2730 valid_cp_range(attribute_name_index, cp->length()) &&
2731 cp->tag_at(attribute_name_index).is_utf8(),
2732 "Attribute name has bad constant pool index %u in class file %s",
2733 attribute_name_index, CHECK);
2734 Symbol* tag = cp->symbol_at(attribute_name_index);
2735 if (tag == vmSymbols::tag_source_file()) {
2736 // Check for SourceFile tag
2737 if (_need_verify) {
2738 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2739 }
2740 if (parsed_sourcefile_attribute) {
2741 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2742 } else {
2743 parsed_sourcefile_attribute = true;
2744 }
2745 parse_classfile_sourcefile_attribute(cp, CHECK);
2746 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2747 // Check for SourceDebugExtension tag
2748 parse_classfile_source_debug_extension_attribute(cp, (int)attribute_length, CHECK);
2749 } else if (tag == vmSymbols::tag_inner_classes()) {
2750 // Check for InnerClasses tag
2751 if (parsed_innerclasses_attribute) {
2752 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2753 } else {
2754 parsed_innerclasses_attribute = true;
2755 }
2756 inner_classes_attribute_start = cfs->get_u1_buffer();
2757 inner_classes_attribute_length = attribute_length;
2758 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2759 } else if (tag == vmSymbols::tag_synthetic()) {
2760 // Check for Synthetic tag
2761 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2762 if (attribute_length != 0) {
2763 classfile_parse_error(
2764 "Invalid Synthetic classfile attribute length %u in class file %s",
2765 attribute_length, CHECK);
2766 }
2767 parse_classfile_synthetic_attribute(cp, CHECK);
2768 } else if (tag == vmSymbols::tag_deprecated()) {
2769 // Check for Deprecatd tag - 4276120
2770 if (attribute_length != 0) {
2771 classfile_parse_error(
2772 "Invalid Deprecated classfile attribute length %u in class file %s",
2773 attribute_length, CHECK);
2774 }
2775 } else if (_major_version >= JAVA_1_5_VERSION) {
2776 if (tag == vmSymbols::tag_signature()) {
2777 if (attribute_length != 2) {
2778 classfile_parse_error(
2779 "Wrong Signature attribute length %u in class file %s",
2780 attribute_length, CHECK);
2781 }
2782 parse_classfile_signature_attribute(cp, CHECK);
2783 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2784 runtime_visible_annotations_length = attribute_length;
2785 runtime_visible_annotations = cfs->get_u1_buffer();
2786 assert(runtime_visible_annotations != NULL, "null visible annotations");
2787 parse_annotations(runtime_visible_annotations,
2788 runtime_visible_annotations_length,
2789 cp,
2790 parsed_annotations,
2791 CHECK);
2792 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2793 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2794 runtime_invisible_annotations_length = attribute_length;
2795 runtime_invisible_annotations = cfs->get_u1_buffer();
2796 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2797 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2798 } else if (tag == vmSymbols::tag_enclosing_method()) {
2799 if (parsed_enclosingmethod_attribute) {
2800 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2801 } else {
2802 parsed_enclosingmethod_attribute = true;
2803 }
2804 cfs->guarantee_more(4, CHECK); // class_index, method_index
2805 enclosing_method_class_index = cfs->get_u2_fast();
2806 enclosing_method_method_index = cfs->get_u2_fast();
2807 if (enclosing_method_class_index == 0) {
2808 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2809 }
2810 // Validate the constant pool indices and types
2811 if (!cp->is_within_bounds(enclosing_method_class_index) ||
2812 !is_klass_reference(cp, enclosing_method_class_index)) {
2813 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2814 }
2815 if (enclosing_method_method_index != 0 &&
2816 (!cp->is_within_bounds(enclosing_method_method_index) ||
2817 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2818 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2819 }
2820 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2821 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2822 if (parsed_bootstrap_methods_attribute)
2823 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2824 parsed_bootstrap_methods_attribute = true;
2825 parse_classfile_bootstrap_methods_attribute(loader_data, cp, attribute_length, CHECK);
2826 } else {
2827 // Unknown attribute
2828 cfs->skip_u1(attribute_length, CHECK);
2829 }
2830 } else {
2831 // Unknown attribute
2832 cfs->skip_u1(attribute_length, CHECK);
2833 }
2834 }
2835 AnnotationArray* annotations = assemble_annotations(loader_data,
2836 runtime_visible_annotations,
2837 runtime_visible_annotations_length,
2838 runtime_invisible_annotations,
2839 runtime_invisible_annotations_length,
2840 CHECK);
2841 set_class_annotations(annotations);
2842
2843 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
2844 u2 num_of_classes = parse_classfile_inner_classes_attribute(
2845 loader_data,
2846 inner_classes_attribute_start,
2847 parsed_innerclasses_attribute,
2848 enclosing_method_class_index,
2849 enclosing_method_method_index,
2850 cp, CHECK);
2851 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
2852 guarantee_property(
2853 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2854 "Wrong InnerClasses attribute length in class file %s", CHECK);
2855 }
2856 }
2857
2858 if (_max_bootstrap_specifier_index >= 0) {
2859 guarantee_property(parsed_bootstrap_methods_attribute,
2860 "Missing BootstrapMethods attribute in class file %s", CHECK);
2861 }
2862 }
2863
2864 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
2865 if (_synthetic_flag)
2866 k->set_is_synthetic();
2867 if (_sourcefile != NULL) {
2868 _sourcefile->increment_refcount();
2869 k->set_source_file_name(_sourcefile);
2870 }
2871 if (_generic_signature != NULL) {
2872 _generic_signature->increment_refcount();
2873 k->set_generic_signature(_generic_signature);
2874 }
2875 if (_sde_buffer != NULL) {
2876 k->set_source_debug_extension(_sde_buffer, _sde_length);
2877 }
2878 k->set_inner_classes(_inner_classes);
2879 if (_annotations != NULL) {
2880 k->annotations()->set_class_annotations(_annotations);
2881 }
2882 }
2883
2884 AnnotationArray* ClassFileParser::assemble_annotations(ClassLoaderData* loader_data,
2885 u1* runtime_visible_annotations,
2886 int runtime_visible_annotations_length,
2887 u1* runtime_invisible_annotations,
2888 int runtime_invisible_annotations_length, TRAPS) {
2889 AnnotationArray* annotations = NULL;
2890 if (runtime_visible_annotations != NULL ||
2891 runtime_invisible_annotations != NULL) {
2892 annotations = MetadataFactory::new_array<u1>(loader_data,
2893 runtime_visible_annotations_length +
2894 runtime_invisible_annotations_length,
2895 CHECK_(annotations));
2896 if (runtime_visible_annotations != NULL) {
2897 for (int i = 0; i < runtime_visible_annotations_length; i++) {
2898 annotations->at_put(i, runtime_visible_annotations[i]);
2899 }
2900 }
2901 if (runtime_invisible_annotations != NULL) {
2902 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
2903 int append = runtime_visible_annotations_length+i;
2904 annotations->at_put(append, runtime_invisible_annotations[i]);
2905 }
2906 }
2907 }
2908 return annotations;
2909 }
2910
2911
2912 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2913 Handle class_loader,
2914 Handle protection_domain,
2915 KlassHandle host_klass,
2916 GrowableArray<Handle>* cp_patches,
2917 TempNewSymbol& parsed_name,
2918 bool verify,
2919 TRAPS) {
2920 // When a retransformable agent is attached, JVMTI caches the
2921 // class bytes that existed before the first retransformation.
2922 // If RedefineClasses() was used before the retransformable
2923 // agent attached, then the cached class bytes may not be the
2924 // original class bytes.
2925 unsigned char *cached_class_file_bytes = NULL;
2926 jint cached_class_file_length;
2927 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
2928
2929 ClassFileStream* cfs = stream();
2930 // Timing
2931 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2932 JavaThread* jt = (JavaThread*) THREAD;
2933
2934 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2935 ClassLoader::perf_class_parse_selftime(),
2936 NULL,
2937 jt->get_thread_stat()->perf_recursion_counts_addr(),
2938 jt->get_thread_stat()->perf_timers_addr(),
2939 PerfClassTraceTime::PARSE_CLASS);
2940
2941 init_parsed_class_attributes();
2942
2943 if (JvmtiExport::should_post_class_file_load_hook()) {
2944 // Get the cached class file bytes (if any) from the class that
2945 // is being redefined or retransformed. We use jvmti_thread_state()
2946 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
2947 // a JvmtiThreadState any earlier than necessary. This will help
2948 // avoid the bug described by 7126851.
2949 JvmtiThreadState *state = jt->jvmti_thread_state();
2950 if (state != NULL) {
2951 KlassHandle *h_class_being_redefined =
2952 state->get_class_being_redefined();
2953 if (h_class_being_redefined != NULL) {
2954 instanceKlassHandle ikh_class_being_redefined =
2955 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
2956 cached_class_file_bytes =
2957 ikh_class_being_redefined->get_cached_class_file_bytes();
2958 cached_class_file_length =
2959 ikh_class_being_redefined->get_cached_class_file_len();
2960 }
2961 }
2962
2963 unsigned char* ptr = cfs->buffer();
2964 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2965
2966 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2967 &ptr, &end_ptr,
2968 &cached_class_file_bytes,
2969 &cached_class_file_length);
2970
2971 if (ptr != cfs->buffer()) {
2972 // JVMTI agent has modified class file data.
2973 // Set new class file stream using JVMTI agent modified
2974 // class file data.
2975 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2976 set_stream(cfs);
2977 }
2978 }
2979
2980 _host_klass = host_klass;
2981 _cp_patches = cp_patches;
2982
2983 instanceKlassHandle nullHandle;
2984
2985 // Figure out whether we can skip format checking (matching classic VM behavior)
2986 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2987
2988 // Set the verify flag in stream
2989 cfs->set_verify(_need_verify);
2990
2991 // Save the class file name for easier error message printing.
2992 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2993
2994 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2995 // Magic value
2996 u4 magic = cfs->get_u4_fast();
2997 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2998 "Incompatible magic value %u in class file %s",
2999 magic, CHECK_(nullHandle));
3000
3001 // Version numbers
3002 u2 minor_version = cfs->get_u2_fast();
3003 u2 major_version = cfs->get_u2_fast();
3004
3005 // Check version numbers - we check this even with verifier off
3006 if (!is_supported_version(major_version, minor_version)) {
3007 if (name == NULL) {
3008 Exceptions::fthrow(
3009 THREAD_AND_LOCATION,
3010 vmSymbols::java_lang_UnsupportedClassVersionError(),
3011 "Unsupported major.minor version %u.%u",
3012 major_version,
3013 minor_version);
3014 } else {
3015 ResourceMark rm(THREAD);
3016 Exceptions::fthrow(
3017 THREAD_AND_LOCATION,
3018 vmSymbols::java_lang_UnsupportedClassVersionError(),
3019 "%s : Unsupported major.minor version %u.%u",
3020 name->as_C_string(),
3021 major_version,
3022 minor_version);
3023 }
3024 return nullHandle;
3025 }
3026
3027 _major_version = major_version;
3028 _minor_version = minor_version;
3029
3030
3031 // Check if verification needs to be relaxed for this class file
3032 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3033 _relax_verify = Verifier::relax_verify_for(class_loader());
3034
3035 // Constant pool
3036 constantPoolHandle cp = parse_constant_pool(loader_data, CHECK_(nullHandle));
3037 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
3038
3039 int cp_size = cp->length();
3040
3041 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3042
3043 // Access flags
3044 AccessFlags access_flags;
3045 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3046
3047 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3048 // Set abstract bit for old class files for backward compatibility
3049 flags |= JVM_ACC_ABSTRACT;
3050 }
3051 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3052 access_flags.set_flags(flags);
3053
3054 // This class and superclass
3055 instanceKlassHandle super_klass;
3056 u2 this_class_index = cfs->get_u2_fast();
3057 check_property(
3058 valid_cp_range(this_class_index, cp_size) &&
3059 cp->tag_at(this_class_index).is_unresolved_klass(),
3060 "Invalid this class index %u in constant pool in class file %s",
3061 this_class_index, CHECK_(nullHandle));
3062
3063 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
3064 assert(class_name != NULL, "class_name can't be null");
3065
3066 // It's important to set parsed_name *before* resolving the super class.
3067 // (it's used for cleanup by the caller if parsing fails)
3068 parsed_name = class_name;
3069 // parsed_name is returned and can be used if there's an error, so add to
3070 // its reference count. Caller will decrement the refcount.
3071 parsed_name->increment_refcount();
3072
3073 // Update _class_name which could be null previously to be class_name
3074 _class_name = class_name;
3075
3076 // Don't need to check whether this class name is legal or not.
3077 // It has been checked when constant pool is parsed.
3078 // However, make sure it is not an array type.
3079 if (_need_verify) {
3080 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3081 "Bad class name in class file %s",
3082 CHECK_(nullHandle));
3083 }
3084
3085 Klass* preserve_this_klass; // for storing result across HandleMark
3086
3087 // release all handles when parsing is done
3088 { HandleMark hm(THREAD);
3089
3090 // Checks if name in class file matches requested name
3091 if (name != NULL && class_name != name) {
3092 ResourceMark rm(THREAD);
3093 Exceptions::fthrow(
3094 THREAD_AND_LOCATION,
3095 vmSymbols::java_lang_NoClassDefFoundError(),
3096 "%s (wrong name: %s)",
3097 name->as_C_string(),
3098 class_name->as_C_string()
3099 );
3100 return nullHandle;
3101 }
3102
3103 if (TraceClassLoadingPreorder) {
3104 tty->print("[Loading %s", name->as_klass_external_name());
3105 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3106 tty->print_cr("]");
3107 }
3108
3109 u2 super_class_index = cfs->get_u2_fast();
3110 if (super_class_index == 0) {
3111 check_property(class_name == vmSymbols::java_lang_Object(),
3112 "Invalid superclass index %u in class file %s",
3113 super_class_index,
3114 CHECK_(nullHandle));
3115 } else {
3116 check_property(valid_cp_range(super_class_index, cp_size) &&
3117 is_klass_reference(cp, super_class_index),
3118 "Invalid superclass index %u in class file %s",
3119 super_class_index,
3120 CHECK_(nullHandle));
3121 // The class name should be legal because it is checked when parsing constant pool.
3122 // However, make sure it is not an array type.
3123 bool is_array = false;
3124 if (cp->tag_at(super_class_index).is_klass()) {
3125 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3126 if (_need_verify)
3127 is_array = super_klass->oop_is_array();
3128 } else if (_need_verify) {
3129 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3130 }
3131 if (_need_verify) {
3132 guarantee_property(!is_array,
3133 "Bad superclass name in class file %s", CHECK_(nullHandle));
3134 }
3135 }
3136
3137 // Interfaces
3138 u2 itfs_len = cfs->get_u2_fast();
3139 Array<Klass*>* local_interfaces;
3140 if (itfs_len == 0) {
3141 local_interfaces = Universe::the_empty_klass_array();
3142 } else {
3143 local_interfaces = parse_interfaces(cp, itfs_len, loader_data, protection_domain, _class_name, CHECK_(nullHandle));
3144 }
3145
3146 u2 java_fields_count = 0;
3147 // Fields (offsets are filled in later)
3148 FieldAllocationCount fac;
3149 Array<AnnotationArray*>* fields_annotations = NULL;
3150 Array<u2>* fields = parse_fields(loader_data, class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
3151 &java_fields_count,
3152 CHECK_(nullHandle));
3153 // Methods
3154 bool has_final_method = false;
3155 AccessFlags promoted_flags;
3156 promoted_flags.set_flags(0);
3157 // These need to be oop pointers because they are allocated lazily
3158 // inside parse_methods inside a nested HandleMark
3159 Array<AnnotationArray*>* methods_annotations = NULL;
3160 Array<AnnotationArray*>* methods_parameter_annotations = NULL;
3161 Array<AnnotationArray*>* methods_default_annotations = NULL;
3162 Array<Method*>* methods = parse_methods(loader_data,
3163 cp, access_flags.is_interface(),
3164 &promoted_flags,
3165 &has_final_method,
3166 &methods_annotations,
3167 &methods_parameter_annotations,
3168 &methods_default_annotations,
3169 CHECK_(nullHandle));
3170
3171 // Additional attributes
3172 ClassAnnotationCollector parsed_annotations;
3173 parse_classfile_attributes(loader_data, cp, &parsed_annotations, CHECK_(nullHandle));
3174
3175 // Make sure this is the end of class file stream
3176 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3177
3178 // We check super class after class file is parsed and format is checked
3179 if (super_class_index > 0 && super_klass.is_null()) {
3180 Symbol* sk = cp->klass_name_at(super_class_index);
3181 if (access_flags.is_interface()) {
3182 // Before attempting to resolve the superclass, check for class format
3183 // errors not checked yet.
3184 guarantee_property(sk == vmSymbols::java_lang_Object(),
3185 "Interfaces must have java.lang.Object as superclass in class file %s",
3186 CHECK_(nullHandle));
3187 }
3188 Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
3189 sk,
3190 class_loader,
3191 protection_domain,
3192 true,
3193 CHECK_(nullHandle));
3194
3195 KlassHandle kh (THREAD, k);
3196 super_klass = instanceKlassHandle(THREAD, kh());
3197 }
3198 if (super_klass.not_null()) {
3199 if (super_klass->is_interface()) {
3200 ResourceMark rm(THREAD);
3201 Exceptions::fthrow(
3202 THREAD_AND_LOCATION,
3203 vmSymbols::java_lang_IncompatibleClassChangeError(),
3204 "class %s has interface %s as super class",
3205 class_name->as_klass_external_name(),
3206 super_klass->external_name()
3207 );
3208 return nullHandle;
3209 }
3210 // Make sure super class is not final
3211 if (super_klass->is_final()) {
3212 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3213 }
3214 }
3215
3216 // Compute the transitive list of all unique interfaces implemented by this class
3217 Array<Klass*>* transitive_interfaces = compute_transitive_interfaces(loader_data, super_klass, local_interfaces, CHECK_(nullHandle));
3218
3219 // sort methods
3220 Array<int>* method_ordering = sort_methods(loader_data,
3221 methods,
3222 methods_annotations,
3223 methods_parameter_annotations,
3224 methods_default_annotations,
3225 CHECK_(nullHandle));
3226
3227 // promote flags from parse_methods() to the klass' flags
3228 access_flags.add_promoted_flags(promoted_flags.as_int());
3229
3230 // Size of Java vtable (in words)
3231 int vtable_size = 0;
3232 int itable_size = 0;
3233 int num_miranda_methods = 0;
3234
3235 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3236 num_miranda_methods,
3237 super_klass(),
3238 methods,
3239 access_flags,
3240 class_loader,
3241 class_name,
3242 local_interfaces,
3243 CHECK_(nullHandle));
3244
3245 // Size of Java itable (in words)
3246 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3247
3248 // Field size and offset computation
3249 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3250 #ifndef PRODUCT
3251 int orig_nonstatic_field_size = 0;
3252 #endif
3253 int static_field_size = 0;
3254 int next_static_oop_offset;
3255 int next_static_double_offset;
3256 int next_static_word_offset;
3257 int next_static_short_offset;
3258 int next_static_byte_offset;
3259 int next_static_type_offset;
3260 int next_nonstatic_oop_offset;
3261 int next_nonstatic_double_offset;
3262 int next_nonstatic_word_offset;
3263 int next_nonstatic_short_offset;
3264 int next_nonstatic_byte_offset;
3265 int next_nonstatic_type_offset;
3266 int first_nonstatic_oop_offset;
3267 int first_nonstatic_field_offset;
3268 int next_nonstatic_field_offset;
3269
3270 // Calculate the starting byte offsets
3271 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3272 next_static_double_offset = next_static_oop_offset +
3273 (fac.count[STATIC_OOP] * heapOopSize);
3274 if ( fac.count[STATIC_DOUBLE] &&
3275 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3276 Universe::field_type_should_be_aligned(T_LONG)) ) {
3277 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3278 }
3279
3280 next_static_word_offset = next_static_double_offset +
3281 (fac.count[STATIC_DOUBLE] * BytesPerLong);
3282 next_static_short_offset = next_static_word_offset +
3283 (fac.count[STATIC_WORD] * BytesPerInt);
3284 next_static_byte_offset = next_static_short_offset +
3285 (fac.count[STATIC_SHORT] * BytesPerShort);
3286 next_static_type_offset = align_size_up((next_static_byte_offset +
3287 fac.count[STATIC_BYTE] ), wordSize );
3288 static_field_size = (next_static_type_offset -
3289 next_static_oop_offset) / wordSize;
3290
3291 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3292 nonstatic_field_size * heapOopSize;
3293 next_nonstatic_field_offset = first_nonstatic_field_offset;
3294
3295 unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3296 unsigned int nonstatic_word_count = fac.count[NONSTATIC_WORD];
3297 unsigned int nonstatic_short_count = fac.count[NONSTATIC_SHORT];
3298 unsigned int nonstatic_byte_count = fac.count[NONSTATIC_BYTE];
3299 unsigned int nonstatic_oop_count = fac.count[NONSTATIC_OOP];
3300
3301 bool super_has_nonstatic_fields =
3302 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3303 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3304 ((nonstatic_double_count + nonstatic_word_count +
3305 nonstatic_short_count + nonstatic_byte_count +
3306 nonstatic_oop_count) != 0);
3307
3308
3309 // Prepare list of oops for oop map generation.
3310 int* nonstatic_oop_offsets;
3311 unsigned int* nonstatic_oop_counts;
3312 unsigned int nonstatic_oop_map_count = 0;
3313
3314 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3315 THREAD, int, nonstatic_oop_count + 1);
3316 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3317 THREAD, unsigned int, nonstatic_oop_count + 1);
3318
3319 first_nonstatic_oop_offset = 0; // will be set for first oop field
3320
3321 #ifndef PRODUCT
3322 if( PrintCompactFieldsSavings ) {
3323 next_nonstatic_double_offset = next_nonstatic_field_offset +
3324 (nonstatic_oop_count * heapOopSize);
3325 if ( nonstatic_double_count > 0 ) {
3326 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3327 }
3328 next_nonstatic_word_offset = next_nonstatic_double_offset +
3329 (nonstatic_double_count * BytesPerLong);
3330 next_nonstatic_short_offset = next_nonstatic_word_offset +
3331 (nonstatic_word_count * BytesPerInt);
3332 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3333 (nonstatic_short_count * BytesPerShort);
3334 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3335 nonstatic_byte_count ), heapOopSize );
3336 orig_nonstatic_field_size = nonstatic_field_size +
3337 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3338 }
3339 #endif
3340 bool compact_fields = CompactFields;
3341 int allocation_style = FieldsAllocationStyle;
3342 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3343 assert(false, "0 <= FieldsAllocationStyle <= 2");
3344 allocation_style = 1; // Optimistic
3345 }
3346
3347 // The next classes have predefined hard-coded fields offsets
3348 // (see in JavaClasses::compute_hard_coded_offsets()).
3349 // Use default fields allocation order for them.
3350 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3351 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3352 class_name == vmSymbols::java_lang_Class() ||
3353 class_name == vmSymbols::java_lang_ClassLoader() ||
3354 class_name == vmSymbols::java_lang_ref_Reference() ||
3355 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3356 class_name == vmSymbols::java_lang_StackTraceElement() ||
3357 class_name == vmSymbols::java_lang_String() ||
3358 class_name == vmSymbols::java_lang_Throwable() ||
3359 class_name == vmSymbols::java_lang_Boolean() ||
3360 class_name == vmSymbols::java_lang_Character() ||
3361 class_name == vmSymbols::java_lang_Float() ||
3362 class_name == vmSymbols::java_lang_Double() ||
3363 class_name == vmSymbols::java_lang_Byte() ||
3364 class_name == vmSymbols::java_lang_Short() ||
3365 class_name == vmSymbols::java_lang_Integer() ||
3366 class_name == vmSymbols::java_lang_Long())) {
3367 allocation_style = 0; // Allocate oops first
3368 compact_fields = false; // Don't compact fields
3369 }
3370
3371 if( allocation_style == 0 ) {
3372 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3373 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3374 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3375 (nonstatic_oop_count * heapOopSize);
3376 } else if( allocation_style == 1 ) {
3377 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3378 next_nonstatic_double_offset = next_nonstatic_field_offset;
3379 } else if( allocation_style == 2 ) {
3380 // Fields allocation: oops fields in super and sub classes are together.
3381 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3382 super_klass->nonstatic_oop_map_size() > 0 ) {
3383 int map_count = super_klass->nonstatic_oop_map_count();
3384 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3385 OopMapBlock* last_map = first_map + map_count - 1;
3386 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3387 if (next_offset == next_nonstatic_field_offset) {
3388 allocation_style = 0; // allocate oops first
3389 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3390 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3391 (nonstatic_oop_count * heapOopSize);
3392 }
3393 }
3394 if( allocation_style == 2 ) {
3395 allocation_style = 1; // allocate oops last
3396 next_nonstatic_double_offset = next_nonstatic_field_offset;
3397 }
3398 } else {
3399 ShouldNotReachHere();
3400 }
3401
3402 int nonstatic_oop_space_count = 0;
3403 int nonstatic_word_space_count = 0;
3404 int nonstatic_short_space_count = 0;
3405 int nonstatic_byte_space_count = 0;
3406 int nonstatic_oop_space_offset;
3407 int nonstatic_word_space_offset;
3408 int nonstatic_short_space_offset;
3409 int nonstatic_byte_space_offset;
3410
3411 if( nonstatic_double_count > 0 ) {
3412 int offset = next_nonstatic_double_offset;
3413 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3414 if( compact_fields && offset != next_nonstatic_double_offset ) {
3415 // Allocate available fields into the gap before double field.
3416 int length = next_nonstatic_double_offset - offset;
3417 assert(length == BytesPerInt, "");
3418 nonstatic_word_space_offset = offset;
3419 if( nonstatic_word_count > 0 ) {
3420 nonstatic_word_count -= 1;
3421 nonstatic_word_space_count = 1; // Only one will fit
3422 length -= BytesPerInt;
3423 offset += BytesPerInt;
3424 }
3425 nonstatic_short_space_offset = offset;
3426 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3427 nonstatic_short_count -= 1;
3428 nonstatic_short_space_count += 1;
3429 length -= BytesPerShort;
3430 offset += BytesPerShort;
3431 }
3432 nonstatic_byte_space_offset = offset;
3433 while( length > 0 && nonstatic_byte_count > 0 ) {
3434 nonstatic_byte_count -= 1;
3435 nonstatic_byte_space_count += 1;
3436 length -= 1;
3437 }
3438 // Allocate oop field in the gap if there are no other fields for that.
3439 nonstatic_oop_space_offset = offset;
3440 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3441 allocation_style != 0 ) { // when oop fields not first
3442 nonstatic_oop_count -= 1;
3443 nonstatic_oop_space_count = 1; // Only one will fit
3444 length -= heapOopSize;
3445 offset += heapOopSize;
3446 }
3447 }
3448 }
3449
3450 next_nonstatic_word_offset = next_nonstatic_double_offset +
3451 (nonstatic_double_count * BytesPerLong);
3452 next_nonstatic_short_offset = next_nonstatic_word_offset +
3453 (nonstatic_word_count * BytesPerInt);
3454 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3455 (nonstatic_short_count * BytesPerShort);
3456
3457 int notaligned_offset;
3458 if( allocation_style == 0 ) {
3459 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3460 } else { // allocation_style == 1
3461 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3462 if( nonstatic_oop_count > 0 ) {
3463 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3464 }
3465 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3466 }
3467 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3468 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3469 - first_nonstatic_field_offset)/heapOopSize);
3470
3471 // Iterate over fields again and compute correct offsets.
3472 // The field allocation type was temporarily stored in the offset slot.
3473 // oop fields are located before non-oop fields (static and non-static).
3474 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3475 int real_offset;
3476 FieldAllocationType atype = (FieldAllocationType) fs.offset();
3477 switch (atype) {
3478 case STATIC_OOP:
3479 real_offset = next_static_oop_offset;
3480 next_static_oop_offset += heapOopSize;
3481 break;
3482 case STATIC_BYTE:
3483 real_offset = next_static_byte_offset;
3484 next_static_byte_offset += 1;
3485 break;
3486 case STATIC_SHORT:
3487 real_offset = next_static_short_offset;
3488 next_static_short_offset += BytesPerShort;
3489 break;
3490 case STATIC_WORD:
3491 real_offset = next_static_word_offset;
3492 next_static_word_offset += BytesPerInt;
3493 break;
3494 case STATIC_DOUBLE:
3495 real_offset = next_static_double_offset;
3496 next_static_double_offset += BytesPerLong;
3497 break;
3498 case NONSTATIC_OOP:
3499 if( nonstatic_oop_space_count > 0 ) {
3500 real_offset = nonstatic_oop_space_offset;
3501 nonstatic_oop_space_offset += heapOopSize;
3502 nonstatic_oop_space_count -= 1;
3503 } else {
3504 real_offset = next_nonstatic_oop_offset;
3505 next_nonstatic_oop_offset += heapOopSize;
3506 }
3507 // Update oop maps
3508 if( nonstatic_oop_map_count > 0 &&
3509 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3510 real_offset -
3511 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3512 heapOopSize ) {
3513 // Extend current oop map
3514 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3515 } else {
3516 // Create new oop map
3517 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3518 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3519 nonstatic_oop_map_count += 1;
3520 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3521 first_nonstatic_oop_offset = real_offset;
3522 }
3523 }
3524 break;
3525 case NONSTATIC_BYTE:
3526 if( nonstatic_byte_space_count > 0 ) {
3527 real_offset = nonstatic_byte_space_offset;
3528 nonstatic_byte_space_offset += 1;
3529 nonstatic_byte_space_count -= 1;
3530 } else {
3531 real_offset = next_nonstatic_byte_offset;
3532 next_nonstatic_byte_offset += 1;
3533 }
3534 break;
3535 case NONSTATIC_SHORT:
3536 if( nonstatic_short_space_count > 0 ) {
3537 real_offset = nonstatic_short_space_offset;
3538 nonstatic_short_space_offset += BytesPerShort;
3539 nonstatic_short_space_count -= 1;
3540 } else {
3541 real_offset = next_nonstatic_short_offset;
3542 next_nonstatic_short_offset += BytesPerShort;
3543 }
3544 break;
3545 case NONSTATIC_WORD:
3546 if( nonstatic_word_space_count > 0 ) {
3547 real_offset = nonstatic_word_space_offset;
3548 nonstatic_word_space_offset += BytesPerInt;
3549 nonstatic_word_space_count -= 1;
3550 } else {
3551 real_offset = next_nonstatic_word_offset;
3552 next_nonstatic_word_offset += BytesPerInt;
3553 }
3554 break;
3555 case NONSTATIC_DOUBLE:
3556 real_offset = next_nonstatic_double_offset;
3557 next_nonstatic_double_offset += BytesPerLong;
3558 break;
3559 default:
3560 ShouldNotReachHere();
3561 }
3562 fs.set_offset(real_offset);
3563 }
3564
3565 // Size of instances
3566 int instance_size;
3567
3568 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3569 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3570
3571 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3572
3573 // Number of non-static oop map blocks allocated at end of klass.
3574 const unsigned int total_oop_map_count =
3575 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3576 first_nonstatic_oop_offset);
3577
3578 // Compute reference type
3579 ReferenceType rt;
3580 if (super_klass() == NULL) {
3581 rt = REF_NONE;
3582 } else {
3583 rt = super_klass->reference_type();
3584 }
3585
3586 // We can now create the basic Klass* for this klass
3587 int total_oop_map_size2 =
3588 InstanceKlass::nonstatic_oop_map_size(total_oop_map_count);
3589
3590 Klass* ik = InstanceKlass::allocate_instance_klass(loader_data,
3591 vtable_size,
3592 itable_size,
3593 static_field_size,
3594 total_oop_map_size2,
3595 rt,
3596 access_flags,
3597 name,
3598 super_klass(),
3599 host_klass,
3600 CHECK_(nullHandle));
3601
3602 // Add all classes to our internal class loader list here,
3603 // including classes in the bootstrap (NULL) class loader.
3604 loader_data->add_class(ik);
3605
3606 instanceKlassHandle this_klass (THREAD, ik);
3607
3608 assert(this_klass->static_field_size() == static_field_size, "sanity");
3609 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3610 "sanity");
3611
3612 // Fill in information already parsed
3613 this_klass->set_should_verify_class(verify);
3614 jint lh = Klass::instance_layout_helper(instance_size, false);
3615 this_klass->set_layout_helper(lh);
3616 assert(this_klass->oop_is_instance(), "layout is correct");
3617 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3618 // Not yet: supers are done below to support the new subtype-checking fields
3619 //this_klass->set_super(super_klass());
3620 this_klass->set_class_loader_data(loader_data);
3621 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3622 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3623 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3624 cp->set_pool_holder(this_klass());
3625 error_handler.set_in_error(false); // turn off error handler for cp
3626 this_klass->set_constants(cp());
3627 this_klass->set_local_interfaces(local_interfaces);
3628 this_klass->set_fields(fields, java_fields_count);
3629 this_klass->set_methods(methods);
3630 if (has_final_method) {
3631 this_klass->set_has_final_method();
3632 }
3633 this_klass->set_method_ordering(method_ordering);
3634 // The InstanceKlass::_methods_jmethod_ids cache and the
3635 // InstanceKlass::_methods_cached_itable_indices cache are
3636 // both managed on the assumption that the initial cache
3637 // size is equal to the number of methods in the class. If
3638 // that changes, then InstanceKlass::idnum_can_increment()
3639 // has to be changed accordingly.
3640 this_klass->set_initial_method_idnum(methods->length());
3641 this_klass->set_name(cp->klass_name_at(this_class_index));
3642 if (is_anonymous()) // I am well known to myself
3643 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3644
3645 if (fields_annotations != NULL ||
3646 methods_annotations != NULL ||
3647 methods_parameter_annotations != NULL ||
3648 methods_default_annotations != NULL) {
3649 // Allocate an annotation type if needed.
3650 Annotations* anno = Annotations::allocate(loader_data,
3651 fields_annotations, methods_annotations,
3652 methods_parameter_annotations,
3653 methods_default_annotations, CHECK_(nullHandle));
3654 this_klass->set_annotations(anno);
3655 } else {
3656 this_klass->set_annotations(NULL);
3657 }
3658
3659
3660 this_klass->set_minor_version(minor_version);
3661 this_klass->set_major_version(major_version);
3662
3663 // Set up Method*::intrinsic_id as soon as we know the names of methods.
3664 // (We used to do this lazily, but now we query it in Rewriter,
3665 // which is eagerly done for every method, so we might as well do it now,
3666 // when everything is fresh in memory.)
3667 if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
3668 for (int j = 0; j < methods->length(); j++) {
3669 methods->at(j)->init_intrinsic_id();
3670 }
3671 }
3672
3673 if (cached_class_file_bytes != NULL) {
3674 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
3675 this_klass->set_cached_class_file(cached_class_file_bytes,
3676 cached_class_file_length);
3677 }
3678
3679 // Miranda methods
3680 if ((num_miranda_methods > 0) ||
3681 // if this class introduced new miranda methods or
3682 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3683 // super class exists and this class inherited miranda methods
3684 ) {
3685 this_klass->set_has_miranda_methods(); // then set a flag
3686 }
3687
3688 // Fill in field values obtained by parse_classfile_attributes
3689 if (parsed_annotations.has_any_annotations()) {
3690 parsed_annotations.apply_to(this_klass);
3691 }
3692 // Create annotations
3693 if (_annotations != NULL && this_klass->annotations() == NULL) {
3694 Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
3695 this_klass->set_annotations(anno);
3696 }
3697 apply_parsed_class_attributes(this_klass);
3698
3699 // Compute transitive closure of interfaces this class implements
3700 this_klass->set_transitive_interfaces(transitive_interfaces);
3701
3702 // Fill in information needed to compute superclasses.
3703 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3704
3705 // Initialize itable offset tables
3706 klassItable::setup_itable_offset_table(this_klass);
3707
3708 // Do final class setup
3709 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3710
3711 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
3712 set_precomputed_flags(this_klass);
3713
3714 // reinitialize modifiers, using the InnerClasses attribute
3715 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3716 this_klass->set_modifier_flags(computed_modifiers);
3717
3718 // check if this class can access its super class
3719 check_super_class_access(this_klass, CHECK_(nullHandle));
3720
3721 // check if this class can access its superinterfaces
3722 check_super_interface_access(this_klass, CHECK_(nullHandle));
3723
3724 // check if this class overrides any final method
3725 check_final_method_override(this_klass, CHECK_(nullHandle));
3726
3727 // check that if this class is an interface then it doesn't have static methods
3728 if (this_klass->is_interface()) {
3729 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3730 }
3731
3732 // Allocate mirror and initialize static fields
3733 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3734
3735 // Allocate a simple java object for locking during class initialization.
3736 // This needs to be a java object because it can be held across a java call.
3737 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL);
3738 this_klass->set_init_lock(r);
3739
3740 // TODO: Move these oops to the mirror
3741 this_klass->set_protection_domain(protection_domain());
3742
3743 // Update the loader_data graph.
3744 record_defined_class_dependencies(this_klass, CHECK_NULL);
3745
3746 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
3747 false /* not shared class */);
3748
3749 if (TraceClassLoading) {
3750 // print in a single call to reduce interleaving of output
3751 if (cfs->source() != NULL) {
3752 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3753 cfs->source());
3754 } else if (class_loader.is_null()) {
3755 if (THREAD->is_Java_thread()) {
3756 Klass* caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3757 tty->print("[Loaded %s by instance of %s]\n",
3758 this_klass->external_name(),
3759 InstanceKlass::cast(caller)->external_name());
3760 } else {
3761 tty->print("[Loaded %s]\n", this_klass->external_name());
3762 }
3763 } else {
3764 ResourceMark rm;
3765 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3766 InstanceKlass::cast(class_loader->klass())->external_name());
3767 }
3768 }
3769
3770 if (TraceClassResolution) {
3771 // print out the superclass.
3772 const char * from = Klass::cast(this_klass())->external_name();
3773 if (this_klass->java_super() != NULL) {
3774 tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
3775 }
3776 // print out each of the interface classes referred to by this class.
3777 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
3778 if (local_interfaces != NULL) {
3779 int length = local_interfaces->length();
3780 for (int i = 0; i < length; i++) {
3781 Klass* k = local_interfaces->at(i);
3782 InstanceKlass* to_class = InstanceKlass::cast(k);
3783 const char * to = to_class->external_name();
3784 tty->print("RESOLVE %s %s (interface)\n", from, to);
3785 }
3786 }
3787 }
3788
3789 #ifndef PRODUCT
3790 if( PrintCompactFieldsSavings ) {
3791 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3792 tty->print("[Saved %d of %d bytes in %s]\n",
3793 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3794 orig_nonstatic_field_size*heapOopSize,
3795 this_klass->external_name());
3796 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3797 tty->print("[Wasted %d over %d bytes in %s]\n",
3798 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3799 orig_nonstatic_field_size*heapOopSize,
3800 this_klass->external_name());
3801 }
3802 }
3803 #endif
3804
3805 // preserve result across HandleMark
3806 preserve_this_klass = this_klass();
3807 }
3808
3809 // Create new handle outside HandleMark (might be needed for
3810 // Extended Class Redefinition)
3811 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3812 debug_only(this_klass->verify();)
3813
3814 return this_klass;
3815 }
3816
3817
3818 unsigned int
3819 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3820 unsigned int nonstatic_oop_map_count,
3821 int first_nonstatic_oop_offset) {
3822 unsigned int map_count =
3823 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3824 if (nonstatic_oop_map_count > 0) {
3825 // We have oops to add to map
3826 if (map_count == 0) {
3827 map_count = nonstatic_oop_map_count;
3828 } else {
3829 // Check whether we should add a new map block or whether the last one can
3830 // be extended
3831 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3832 OopMapBlock* const last_map = first_map + map_count - 1;
3833
3834 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3835 if (next_offset == first_nonstatic_oop_offset) {
3836 // There is no gap bettwen superklass's last oop field and first
3837 // local oop field, merge maps.
3838 nonstatic_oop_map_count -= 1;
3839 } else {
3840 // Superklass didn't end with a oop field, add extra maps
3841 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3842 }
3843 map_count += nonstatic_oop_map_count;
3844 }
3845 }
3846 return map_count;
3847 }
3848
3849
3850 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3851 unsigned int nonstatic_oop_map_count,
3852 int* nonstatic_oop_offsets,
3853 unsigned int* nonstatic_oop_counts) {
3854 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3855 const InstanceKlass* const super = k->superklass();
3856 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3857 if (super_count > 0) {
3858 // Copy maps from superklass
3859 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3860 for (unsigned int i = 0; i < super_count; ++i) {
3861 *this_oop_map++ = *super_oop_map++;
3862 }
3863 }
3864
3865 if (nonstatic_oop_map_count > 0) {
3866 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3867 // The counts differ because there is no gap between superklass's last oop
3868 // field and the first local oop field. Extend the last oop map copied
3869 // from the superklass instead of creating new one.
3870 nonstatic_oop_map_count--;
3871 nonstatic_oop_offsets++;
3872 this_oop_map--;
3873 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3874 this_oop_map++;
3875 }
3876
3877 // Add new map blocks, fill them
3878 while (nonstatic_oop_map_count-- > 0) {
3879 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3880 this_oop_map->set_count(*nonstatic_oop_counts++);
3881 this_oop_map++;
3882 }
3883 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3884 this_oop_map, "sanity");
3885 }
3886 }
3887
3888
3889 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3890 Klass* super = k->super();
3891
3892 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3893 // in which case we don't have to register objects as finalizable
3894 if (!_has_empty_finalizer) {
3895 if (_has_finalizer ||
3896 (super != NULL && super->has_finalizer())) {
3897 k->set_has_finalizer();
3898 }
3899 }
3900
3901 #ifdef ASSERT
3902 bool f = false;
3903 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
3904 vmSymbols::void_method_signature());
3905 if (m != NULL && !m->is_empty_method()) {
3906 f = true;
3907 }
3908 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3909 #endif
3910
3911 // Check if this klass supports the java.lang.Cloneable interface
3912 if (SystemDictionary::Cloneable_klass_loaded()) {
3913 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3914 k->set_is_cloneable();
3915 }
3916 }
3917
3918 // Check if this klass has a vanilla default constructor
3919 if (super == NULL) {
3920 // java.lang.Object has empty default constructor
3921 k->set_has_vanilla_constructor();
3922 } else {
3923 if (Klass::cast(super)->has_vanilla_constructor() &&
3924 _has_vanilla_constructor) {
3925 k->set_has_vanilla_constructor();
3926 }
3927 #ifdef ASSERT
3928 bool v = false;
3929 if (Klass::cast(super)->has_vanilla_constructor()) {
3930 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
3931 ), vmSymbols::void_method_signature());
3932 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3933 v = true;
3934 }
3935 }
3936 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3937 #endif
3938 }
3939
3940 // If it cannot be fast-path allocated, set a bit in the layout helper.
3941 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3942 assert(k->size_helper() > 0, "layout_helper is initialized");
3943 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3944 || k->is_abstract() || k->is_interface()
3945 || (k->name() == vmSymbols::java_lang_Class()
3946 && k->class_loader_data()->is_the_null_class_loader_data())
3947 || k->size_helper() >= FastAllocateSizeLimit) {
3948 // Forbid fast-path allocation.
3949 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3950 k->set_layout_helper(lh);
3951 }
3952 }
3953
3954 // Attach super classes and interface classes to class loader data
3955 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
3956 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
3957 if (defining_loader_data->is_the_null_class_loader_data()) {
3958 // Dependencies to null class loader data are implicit.
3959 return;
3960 } else {
3961 // add super class dependency
3962 Klass* super = defined_klass->super();
3963 if (super != NULL) {
3964 defining_loader_data->record_dependency(super, CHECK);
3965 }
3966
3967 // add super interface dependencies
3968 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
3969 if (local_interfaces != NULL) {
3970 int length = local_interfaces->length();
3971 for (int i = 0; i < length; i++) {
3972 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
3973 }
3974 }
3975 }
3976 }
3977
3978 // utility method for appending and array with check for duplicates
3979
3980 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
3981 // iterate over new interfaces
3982 for (int i = 0; i < ifs->length(); i++) {
3983 Klass* e = ifs->at(i);
3984 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
3985 // add new interface
3986 result->append_if_missing(e);
3987 }
3988 }
3989
3990
3991 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(ClassLoaderData* loader_data, instanceKlassHandle super, Array<Klass*>* local_ifs, TRAPS) {
3992 // Compute maximum size for transitive interfaces
3993 int max_transitive_size = 0;
3994 int super_size = 0;
3995 // Add superclass transitive interfaces size
3996 if (super.not_null()) {
3997 super_size = super->transitive_interfaces()->length();
3998 max_transitive_size += super_size;
3999 }
4000 // Add local interfaces' super interfaces
4001 int local_size = local_ifs->length();
4002 for (int i = 0; i < local_size; i++) {
4003 Klass* l = local_ifs->at(i);
4004 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4005 }
4006 // Finally add local interfaces
4007 max_transitive_size += local_size;
4008 // Construct array
4009 if (max_transitive_size == 0) {
4010 // no interfaces, use canonicalized array
4011 return Universe::the_empty_klass_array();
4012 } else if (max_transitive_size == super_size) {
4013 // no new local interfaces added, share superklass' transitive interface array
4014 return super->transitive_interfaces();
4015 } else if (max_transitive_size == local_size) {
4016 // only local interfaces added, share local interface array
4017 return local_ifs;
4018 } else {
4019 ResourceMark rm;
4020 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4021
4022 // Copy down from superclass
4023 if (super.not_null()) {
4024 append_interfaces(result, super->transitive_interfaces());
4025 }
4026
4027 // Copy down from local interfaces' superinterfaces
4028 for (int i = 0; i < local_ifs->length(); i++) {
4029 Klass* l = local_ifs->at(i);
4030 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4031 }
4032 // Finally add local interfaces
4033 append_interfaces(result, local_ifs);
4034
4035 // length will be less than the max_transitive_size if duplicates were removed
4036 int length = result->length();
4037 assert(length <= max_transitive_size, "just checking");
4038 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4039 for (int i = 0; i < length; i++) {
4040 Klass* e = result->at(i);
4041 assert(e != NULL, "just checking");
4042 new_result->at_put(i, e);
4043 }
4044 return new_result;
4045 }
4046 }
4047
4048
4049 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4050 Klass* super = this_klass->super();
4051 if ((super != NULL) &&
4052 (!Reflection::verify_class_access(this_klass(), super, false))) {
4053 ResourceMark rm(THREAD);
4054 Exceptions::fthrow(
4055 THREAD_AND_LOCATION,
4056 vmSymbols::java_lang_IllegalAccessError(),
4057 "class %s cannot access its superclass %s",
4058 this_klass->external_name(),
4059 InstanceKlass::cast(super)->external_name()
4060 );
4061 return;
4062 }
4063 }
4064
4065
4066 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4067 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4068 int lng = local_interfaces->length();
4069 for (int i = lng - 1; i >= 0; i--) {
4070 Klass* k = local_interfaces->at(i);
4071 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
4072 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4073 ResourceMark rm(THREAD);
4074 Exceptions::fthrow(
4075 THREAD_AND_LOCATION,
4076 vmSymbols::java_lang_IllegalAccessError(),
4077 "class %s cannot access its superinterface %s",
4078 this_klass->external_name(),
4079 InstanceKlass::cast(k)->external_name()
4080 );
4081 return;
4082 }
4083 }
4084 }
4085
4086
4087 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4088 Array<Method*>* methods = this_klass->methods();
4089 int num_methods = methods->length();
4090
4091 // go thru each method and check if it overrides a final method
4092 for (int index = 0; index < num_methods; index++) {
4093 Method* m = methods->at(index);
4094
4095 // skip private, static and <init> methods
4096 if ((!m->is_private()) &&
4097 (!m->is_static()) &&
4098 (m->name() != vmSymbols::object_initializer_name())) {
4099
4100 Symbol* name = m->name();
4101 Symbol* signature = m->signature();
4102 Klass* k = this_klass->super();
4103 Method* super_m = NULL;
4104 while (k != NULL) {
4105 // skip supers that don't have final methods.
4106 if (k->has_final_method()) {
4107 // lookup a matching method in the super class hierarchy
4108 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4109 if (super_m == NULL) {
4110 break; // didn't find any match; get out
4111 }
4112
4113 if (super_m->is_final() &&
4114 // matching method in super is final
4115 (Reflection::verify_field_access(this_klass(),
4116 super_m->method_holder(),
4117 super_m->method_holder(),
4118 super_m->access_flags(), false))
4119 // this class can access super final method and therefore override
4120 ) {
4121 ResourceMark rm(THREAD);
4122 Exceptions::fthrow(
4123 THREAD_AND_LOCATION,
4124 vmSymbols::java_lang_VerifyError(),
4125 "class %s overrides final method %s.%s",
4126 this_klass->external_name(),
4127 name->as_C_string(),
4128 signature->as_C_string()
4129 );
4130 return;
4131 }
4132
4133 // continue to look from super_m's holder's super.
4134 k = InstanceKlass::cast(super_m->method_holder())->super();
4135 continue;
4136 }
4137
4138 k = k->super();
4139 }
4140 }
4141 }
4142 }
4143
4144
4145 // assumes that this_klass is an interface
4146 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4147 assert(this_klass->is_interface(), "not an interface");
4148 Array<Method*>* methods = this_klass->methods();
4149 int num_methods = methods->length();
4150
4151 for (int index = 0; index < num_methods; index++) {
4152 Method* m = methods->at(index);
4153 // if m is static and not the init method, throw a verify error
4154 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4155 ResourceMark rm(THREAD);
4156 Exceptions::fthrow(
4157 THREAD_AND_LOCATION,
4158 vmSymbols::java_lang_VerifyError(),
4159 "Illegal static method %s in interface %s",
4160 m->name()->as_C_string(),
4161 this_klass->external_name()
4162 );
4163 return;
4164 }
4165 }
4166 }
4167
4168 // utility methods for format checking
4169
4170 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4171 if (!_need_verify) { return; }
4172
4173 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4174 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4175 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4176 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4177 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4178 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4179 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4180
4181 if ((is_abstract && is_final) ||
4182 (is_interface && !is_abstract) ||
4183 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4184 (!is_interface && major_gte_15 && is_annotation)) {
4185 ResourceMark rm(THREAD);
4186 Exceptions::fthrow(
4187 THREAD_AND_LOCATION,
4188 vmSymbols::java_lang_ClassFormatError(),
4189 "Illegal class modifiers in class %s: 0x%X",
4190 _class_name->as_C_string(), flags
4191 );
4192 return;
4193 }
4194 }
4195
4196 bool ClassFileParser::has_illegal_visibility(jint flags) {
4197 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4198 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4199 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4200
4201 return ((is_public && is_protected) ||
4202 (is_public && is_private) ||
4203 (is_protected && is_private));
4204 }
4205
4206 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4207 u2 max_version =
4208 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4209 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4210 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4211 (major <= max_version) &&
4212 ((major != max_version) ||
4213 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4214 }
4215
4216 void ClassFileParser::verify_legal_field_modifiers(
4217 jint flags, bool is_interface, TRAPS) {
4218 if (!_need_verify) { return; }
4219
4220 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4221 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4222 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4223 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4224 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4225 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4226 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4227 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4228 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4229
4230 bool is_illegal = false;
4231
4232 if (is_interface) {
4233 if (!is_public || !is_static || !is_final || is_private ||
4234 is_protected || is_volatile || is_transient ||
4235 (major_gte_15 && is_enum)) {
4236 is_illegal = true;
4237 }
4238 } else { // not interface
4239 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4240 is_illegal = true;
4241 }
4242 }
4243
4244 if (is_illegal) {
4245 ResourceMark rm(THREAD);
4246 Exceptions::fthrow(
4247 THREAD_AND_LOCATION,
4248 vmSymbols::java_lang_ClassFormatError(),
4249 "Illegal field modifiers in class %s: 0x%X",
4250 _class_name->as_C_string(), flags);
4251 return;
4252 }
4253 }
4254
4255 void ClassFileParser::verify_legal_method_modifiers(
4256 jint flags, bool is_interface, Symbol* name, TRAPS) {
4257 if (!_need_verify) { return; }
4258
4259 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4260 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4261 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4262 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4263 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4264 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4265 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4266 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4267 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4268 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4269 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4270
4271 bool is_illegal = false;
4272
4273 if (is_interface) {
4274 if (!is_abstract || !is_public || is_static || is_final ||
4275 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4276 is_illegal = true;
4277 }
4278 } else { // not interface
4279 if (is_initializer) {
4280 if (is_static || is_final || is_synchronized || is_native ||
4281 is_abstract || (major_gte_15 && is_bridge)) {
4282 is_illegal = true;
4283 }
4284 } else { // not initializer
4285 if (is_abstract) {
4286 if ((is_final || is_native || is_private || is_static ||
4287 (major_gte_15 && (is_synchronized || is_strict)))) {
4288 is_illegal = true;
4289 }
4290 }
4291 if (has_illegal_visibility(flags)) {
4292 is_illegal = true;
4293 }
4294 }
4295 }
4296
4297 if (is_illegal) {
4298 ResourceMark rm(THREAD);
4299 Exceptions::fthrow(
4300 THREAD_AND_LOCATION,
4301 vmSymbols::java_lang_ClassFormatError(),
4302 "Method %s in class %s has illegal modifiers: 0x%X",
4303 name->as_C_string(), _class_name->as_C_string(), flags);
4304 return;
4305 }
4306 }
4307
4308 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4309 assert(_need_verify, "only called when _need_verify is true");
4310 int i = 0;
4311 int count = length >> 2;
4312 for (int k=0; k<count; k++) {
4313 unsigned char b0 = buffer[i];
4314 unsigned char b1 = buffer[i+1];
4315 unsigned char b2 = buffer[i+2];
4316 unsigned char b3 = buffer[i+3];
4317 // For an unsigned char v,
4318 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4319 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4320 unsigned char res = b0 | b0 - 1 |
4321 b1 | b1 - 1 |
4322 b2 | b2 - 1 |
4323 b3 | b3 - 1;
4324 if (res >= 128) break;
4325 i += 4;
4326 }
4327 for(; i < length; i++) {
4328 unsigned short c;
4329 // no embedded zeros
4330 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4331 if(buffer[i] < 128) {
4332 continue;
4333 }
4334 if ((i + 5) < length) { // see if it's legal supplementary character
4335 if (UTF8::is_supplementary_character(&buffer[i])) {
4336 c = UTF8::get_supplementary_character(&buffer[i]);
4337 i += 5;
4338 continue;
4339 }
4340 }
4341 switch (buffer[i] >> 4) {
4342 default: break;
4343 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4344 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4345 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4346 c = (buffer[i] & 0x1F) << 6;
4347 i++;
4348 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4349 c += buffer[i] & 0x3F;
4350 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4351 // for classes with major > 47, c must a null or a character in its shortest form
4352 break;
4353 }
4354 }
4355 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4356 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4357 c = (buffer[i] & 0xF) << 12;
4358 i += 2;
4359 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4360 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4361 if (_major_version <= 47 || c >= 0x800) {
4362 // for classes with major > 47, c must be in its shortest form
4363 break;
4364 }
4365 }
4366 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4367 } // end of switch
4368 } // end of for
4369 }
4370
4371 // Checks if name is a legal class name.
4372 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4373 if (!_need_verify || _relax_verify) { return; }
4374
4375 char buf[fixed_buffer_size];
4376 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4377 unsigned int length = name->utf8_length();
4378 bool legal = false;
4379
4380 if (length > 0) {
4381 char* p;
4382 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4383 p = skip_over_field_signature(bytes, false, length, CHECK);
4384 legal = (p != NULL) && ((p - bytes) == (int)length);
4385 } else if (_major_version < JAVA_1_5_VERSION) {
4386 if (bytes[0] != '<') {
4387 p = skip_over_field_name(bytes, true, length);
4388 legal = (p != NULL) && ((p - bytes) == (int)length);
4389 }
4390 } else {
4391 // 4900761: relax the constraints based on JSR202 spec
4392 // Class names may be drawn from the entire Unicode character set.
4393 // Identifiers between '/' must be unqualified names.
4394 // The utf8 string has been verified when parsing cpool entries.
4395 legal = verify_unqualified_name(bytes, length, LegalClass);
4396 }
4397 }
4398 if (!legal) {
4399 ResourceMark rm(THREAD);
4400 Exceptions::fthrow(
4401 THREAD_AND_LOCATION,
4402 vmSymbols::java_lang_ClassFormatError(),
4403 "Illegal class name \"%s\" in class file %s", bytes,
4404 _class_name->as_C_string()
4405 );
4406 return;
4407 }
4408 }
4409
4410 // Checks if name is a legal field name.
4411 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4412 if (!_need_verify || _relax_verify) { return; }
4413
4414 char buf[fixed_buffer_size];
4415 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4416 unsigned int length = name->utf8_length();
4417 bool legal = false;
4418
4419 if (length > 0) {
4420 if (_major_version < JAVA_1_5_VERSION) {
4421 if (bytes[0] != '<') {
4422 char* p = skip_over_field_name(bytes, false, length);
4423 legal = (p != NULL) && ((p - bytes) == (int)length);
4424 }
4425 } else {
4426 // 4881221: relax the constraints based on JSR202 spec
4427 legal = verify_unqualified_name(bytes, length, LegalField);
4428 }
4429 }
4430
4431 if (!legal) {
4432 ResourceMark rm(THREAD);
4433 Exceptions::fthrow(
4434 THREAD_AND_LOCATION,
4435 vmSymbols::java_lang_ClassFormatError(),
4436 "Illegal field name \"%s\" in class %s", bytes,
4437 _class_name->as_C_string()
4438 );
4439 return;
4440 }
4441 }
4442
4443 // Checks if name is a legal method name.
4444 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4445 if (!_need_verify || _relax_verify) { return; }
4446
4447 assert(name != NULL, "method name is null");
4448 char buf[fixed_buffer_size];
4449 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4450 unsigned int length = name->utf8_length();
4451 bool legal = false;
4452
4453 if (length > 0) {
4454 if (bytes[0] == '<') {
4455 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4456 legal = true;
4457 }
4458 } else if (_major_version < JAVA_1_5_VERSION) {
4459 char* p;
4460 p = skip_over_field_name(bytes, false, length);
4461 legal = (p != NULL) && ((p - bytes) == (int)length);
4462 } else {
4463 // 4881221: relax the constraints based on JSR202 spec
4464 legal = verify_unqualified_name(bytes, length, LegalMethod);
4465 }
4466 }
4467
4468 if (!legal) {
4469 ResourceMark rm(THREAD);
4470 Exceptions::fthrow(
4471 THREAD_AND_LOCATION,
4472 vmSymbols::java_lang_ClassFormatError(),
4473 "Illegal method name \"%s\" in class %s", bytes,
4474 _class_name->as_C_string()
4475 );
4476 return;
4477 }
4478 }
4479
4480
4481 // Checks if signature is a legal field signature.
4482 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4483 if (!_need_verify) { return; }
4484
4485 char buf[fixed_buffer_size];
4486 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4487 unsigned int length = signature->utf8_length();
4488 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4489
4490 if (p == NULL || (p - bytes) != (int)length) {
4491 throwIllegalSignature("Field", name, signature, CHECK);
4492 }
4493 }
4494
4495 // Checks if signature is a legal method signature.
4496 // Returns number of parameters
4497 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4498 if (!_need_verify) {
4499 // make sure caller's args_size will be less than 0 even for non-static
4500 // method so it will be recomputed in compute_size_of_parameters().
4501 return -2;
4502 }
4503
4504 unsigned int args_size = 0;
4505 char buf[fixed_buffer_size];
4506 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4507 unsigned int length = signature->utf8_length();
4508 char* nextp;
4509
4510 // The first character must be a '('
4511 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4512 length--;
4513 // Skip over legal field signatures
4514 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4515 while ((length > 0) && (nextp != NULL)) {
4516 args_size++;
4517 if (p[0] == 'J' || p[0] == 'D') {
4518 args_size++;
4519 }
4520 length -= nextp - p;
4521 p = nextp;
4522 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4523 }
4524 // The first non-signature thing better be a ')'
4525 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4526 length--;
4527 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4528 // All internal methods must return void
4529 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4530 return args_size;
4531 }
4532 } else {
4533 // Now we better just have a return value
4534 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4535 if (nextp && ((int)length == (nextp - p))) {
4536 return args_size;
4537 }
4538 }
4539 }
4540 }
4541 // Report error
4542 throwIllegalSignature("Method", name, signature, CHECK_0);
4543 return 0;
4544 }
4545
4546
4547 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4548 // Method names also may not contain the characters '<' or '>', unless <init>
4549 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4550 // method. Because these names have been checked as special cases before
4551 // calling this method in verify_legal_method_name.
4552 bool ClassFileParser::verify_unqualified_name(
4553 char* name, unsigned int length, int type) {
4554 jchar ch;
4555
4556 for (char* p = name; p != name + length; ) {
4557 ch = *p;
4558 if (ch < 128) {
4559 p++;
4560 if (ch == '.' || ch == ';' || ch == '[' ) {
4561 return false; // do not permit '.', ';', or '['
4562 }
4563 if (type != LegalClass && ch == '/') {
4564 return false; // do not permit '/' unless it's class name
4565 }
4566 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4567 return false; // do not permit '<' or '>' in method names
4568 }
4569 } else {
4570 char* tmp_p = UTF8::next(p, &ch);
4571 p = tmp_p;
4572 }
4573 }
4574 return true;
4575 }
4576
4577
4578 // Take pointer to a string. Skip over the longest part of the string that could
4579 // be taken as a fieldname. Allow '/' if slash_ok is true.
4580 // Return a pointer to just past the fieldname.
4581 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4582 // being true, we saw consecutive slashes (meaning we were looking for a
4583 // qualified path but found something that was badly-formed).
4584 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4585 char* p;
4586 jchar ch;
4587 jboolean last_is_slash = false;
4588 jboolean not_first_ch = false;
4589
4590 for (p = name; p != name + length; not_first_ch = true) {
4591 char* old_p = p;
4592 ch = *p;
4593 if (ch < 128) {
4594 p++;
4595 // quick check for ascii
4596 if ((ch >= 'a' && ch <= 'z') ||
4597 (ch >= 'A' && ch <= 'Z') ||
4598 (ch == '_' || ch == '$') ||
4599 (not_first_ch && ch >= '0' && ch <= '9')) {
4600 last_is_slash = false;
4601 continue;
4602 }
4603 if (slash_ok && ch == '/') {
4604 if (last_is_slash) {
4605 return NULL; // Don't permit consecutive slashes
4606 }
4607 last_is_slash = true;
4608 continue;
4609 }
4610 } else {
4611 jint unicode_ch;
4612 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4613 p = tmp_p;
4614 last_is_slash = false;
4615 // Check if ch is Java identifier start or is Java identifier part
4616 // 4672820: call java.lang.Character methods directly without generating separate tables.
4617 EXCEPTION_MARK;
4618 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4619
4620 // return value
4621 JavaValue result(T_BOOLEAN);
4622 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4623 JavaCallArguments args;
4624 args.push_int(unicode_ch);
4625
4626 // public static boolean isJavaIdentifierStart(char ch);
4627 JavaCalls::call_static(&result,
4628 klass,
4629 vmSymbols::isJavaIdentifierStart_name(),
4630 vmSymbols::int_bool_signature(),
4631 &args,
4632 THREAD);
4633
4634 if (HAS_PENDING_EXCEPTION) {
4635 CLEAR_PENDING_EXCEPTION;
4636 return 0;
4637 }
4638 if (result.get_jboolean()) {
4639 continue;
4640 }
4641
4642 if (not_first_ch) {
4643 // public static boolean isJavaIdentifierPart(char ch);
4644 JavaCalls::call_static(&result,
4645 klass,
4646 vmSymbols::isJavaIdentifierPart_name(),
4647 vmSymbols::int_bool_signature(),
4648 &args,
4649 THREAD);
4650
4651 if (HAS_PENDING_EXCEPTION) {
4652 CLEAR_PENDING_EXCEPTION;
4653 return 0;
4654 }
4655
4656 if (result.get_jboolean()) {
4657 continue;
4658 }
4659 }
4660 }
4661 return (not_first_ch) ? old_p : NULL;
4662 }
4663 return (not_first_ch) ? p : NULL;
4664 }
4665
4666
4667 // Take pointer to a string. Skip over the longest part of the string that could
4668 // be taken as a field signature. Allow "void" if void_ok.
4669 // Return a pointer to just past the signature.
4670 // Return NULL if no legal signature is found.
4671 char* ClassFileParser::skip_over_field_signature(char* signature,
4672 bool void_ok,
4673 unsigned int length,
4674 TRAPS) {
4675 unsigned int array_dim = 0;
4676 while (length > 0) {
4677 switch (signature[0]) {
4678 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4679 case JVM_SIGNATURE_BOOLEAN:
4680 case JVM_SIGNATURE_BYTE:
4681 case JVM_SIGNATURE_CHAR:
4682 case JVM_SIGNATURE_SHORT:
4683 case JVM_SIGNATURE_INT:
4684 case JVM_SIGNATURE_FLOAT:
4685 case JVM_SIGNATURE_LONG:
4686 case JVM_SIGNATURE_DOUBLE:
4687 return signature + 1;
4688 case JVM_SIGNATURE_CLASS: {
4689 if (_major_version < JAVA_1_5_VERSION) {
4690 // Skip over the class name if one is there
4691 char* p = skip_over_field_name(signature + 1, true, --length);
4692
4693 // The next character better be a semicolon
4694 if (p && (p - signature) > 1 && p[0] == ';') {
4695 return p + 1;
4696 }
4697 } else {
4698 // 4900761: For class version > 48, any unicode is allowed in class name.
4699 length--;
4700 signature++;
4701 while (length > 0 && signature[0] != ';') {
4702 if (signature[0] == '.') {
4703 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4704 }
4705 length--;
4706 signature++;
4707 }
4708 if (signature[0] == ';') { return signature + 1; }
4709 }
4710
4711 return NULL;
4712 }
4713 case JVM_SIGNATURE_ARRAY:
4714 array_dim++;
4715 if (array_dim > 255) {
4716 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4717 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4718 }
4719 // The rest of what's there better be a legal signature
4720 signature++;
4721 length--;
4722 void_ok = false;
4723 break;
4724
4725 default:
4726 return NULL;
4727 }
4728 }
4729 return NULL;
4730 }