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 if (LinkWellKnownClasses) // my super type is well known to me
821 cp->klass_at_put(interface_index, interf()); // eagerly resolve
822 }
823
824 if (!Klass::cast(interf())->is_interface()) {
825 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
826 }
827 interfaces->at_put(index, interf());
828 }
829
830 if (!_need_verify || length <= 1) {
831 return interfaces;
832 }
833
834 // Check if there's any duplicates in interfaces
835 ResourceMark rm(THREAD);
836 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
837 THREAD, NameSigHash*, HASH_ROW_SIZE);
838 initialize_hashtable(interface_names);
839 bool dup = false;
840 {
841 debug_only(No_Safepoint_Verifier nsv;)
842 for (index = 0; index < length; index++) {
843 Klass* k = interfaces->at(index);
844 Symbol* name = InstanceKlass::cast(k)->name();
845 // If no duplicates, add (name, NULL) in hashtable interface_names.
846 if (!put_after_lookup(name, NULL, interface_names)) {
847 dup = true;
848 break;
849 }
850 }
851 }
852 if (dup) {
853 classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
854 }
855
856 return interfaces;
857 }
858
859
860 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
861 // Make sure the constant pool entry is of a type appropriate to this field
862 guarantee_property(
863 (constantvalue_index > 0 &&
864 constantvalue_index < cp->length()),
865 "Bad initial value index %u in ConstantValue attribute in class file %s",
866 constantvalue_index, CHECK);
867 constantTag value_type = cp->tag_at(constantvalue_index);
868 switch ( cp->basic_type_for_signature_at(signature_index) ) {
869 case T_LONG:
870 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
871 break;
872 case T_FLOAT:
873 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
874 break;
875 case T_DOUBLE:
876 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
877 break;
878 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
879 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
880 break;
881 case T_OBJECT:
882 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
883 && value_type.is_string()),
884 "Bad string initial value in class file %s", CHECK);
885 break;
886 default:
887 classfile_parse_error(
888 "Unable to set initial value %u in class file %s",
889 constantvalue_index, CHECK);
890 }
891 }
892
893
894 // Parse attributes for a field.
895 void ClassFileParser::parse_field_attributes(ClassLoaderData* loader_data,
896 constantPoolHandle cp,
897 u2 attributes_count,
898 bool is_static, u2 signature_index,
899 u2* constantvalue_index_addr,
900 bool* is_synthetic_addr,
901 u2* generic_signature_index_addr,
902 AnnotationArray** field_annotations,
903 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
904 TRAPS) {
905 ClassFileStream* cfs = stream();
906 assert(attributes_count > 0, "length should be greater than 0");
907 u2 constantvalue_index = 0;
908 u2 generic_signature_index = 0;
909 bool is_synthetic = false;
910 u1* runtime_visible_annotations = NULL;
911 int runtime_visible_annotations_length = 0;
912 u1* runtime_invisible_annotations = NULL;
913 int runtime_invisible_annotations_length = 0;
914 while (attributes_count--) {
915 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
916 u2 attribute_name_index = cfs->get_u2_fast();
917 u4 attribute_length = cfs->get_u4_fast();
918 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
919 cp->tag_at(attribute_name_index).is_utf8(),
920 "Invalid field attribute index %u in class file %s",
921 attribute_name_index,
922 CHECK);
923 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
924 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
925 // ignore if non-static
926 if (constantvalue_index != 0) {
927 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
928 }
929 check_property(
930 attribute_length == 2,
931 "Invalid ConstantValue field attribute length %u in class file %s",
932 attribute_length, CHECK);
933 constantvalue_index = cfs->get_u2(CHECK);
934 if (_need_verify) {
935 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
936 }
937 } else if (attribute_name == vmSymbols::tag_synthetic()) {
938 if (attribute_length != 0) {
939 classfile_parse_error(
940 "Invalid Synthetic field attribute length %u in class file %s",
941 attribute_length, CHECK);
942 }
943 is_synthetic = true;
944 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
945 if (attribute_length != 0) {
946 classfile_parse_error(
947 "Invalid Deprecated field attribute length %u in class file %s",
948 attribute_length, CHECK);
949 }
950 } else if (_major_version >= JAVA_1_5_VERSION) {
951 if (attribute_name == vmSymbols::tag_signature()) {
952 if (attribute_length != 2) {
953 classfile_parse_error(
954 "Wrong size %u for field's Signature attribute in class file %s",
955 attribute_length, CHECK);
956 }
957 generic_signature_index = cfs->get_u2(CHECK);
958 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
959 runtime_visible_annotations_length = attribute_length;
960 runtime_visible_annotations = cfs->get_u1_buffer();
961 assert(runtime_visible_annotations != NULL, "null visible annotations");
962 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
963 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
964 runtime_invisible_annotations_length = attribute_length;
965 runtime_invisible_annotations = cfs->get_u1_buffer();
966 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
967 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
968 } else {
969 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
970 }
971 } else {
972 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
973 }
974 }
975
976 *constantvalue_index_addr = constantvalue_index;
977 *is_synthetic_addr = is_synthetic;
978 *generic_signature_index_addr = generic_signature_index;
979 *field_annotations = assemble_annotations(loader_data,
980 runtime_visible_annotations,
981 runtime_visible_annotations_length,
982 runtime_invisible_annotations,
983 runtime_invisible_annotations_length,
984 CHECK);
985 return;
986 }
987
988
989 // Field allocation types. Used for computing field offsets.
990
991 enum FieldAllocationType {
992 STATIC_OOP, // Oops
993 STATIC_BYTE, // Boolean, Byte, char
994 STATIC_SHORT, // shorts
995 STATIC_WORD, // ints
996 STATIC_DOUBLE, // aligned long or double
997 NONSTATIC_OOP,
998 NONSTATIC_BYTE,
999 NONSTATIC_SHORT,
1000 NONSTATIC_WORD,
1001 NONSTATIC_DOUBLE,
1002 MAX_FIELD_ALLOCATION_TYPE,
1003 BAD_ALLOCATION_TYPE = -1
1004 };
1005
1006 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1007 BAD_ALLOCATION_TYPE, // 0
1008 BAD_ALLOCATION_TYPE, // 1
1009 BAD_ALLOCATION_TYPE, // 2
1010 BAD_ALLOCATION_TYPE, // 3
1011 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1012 NONSTATIC_SHORT, // T_CHAR = 5,
1013 NONSTATIC_WORD, // T_FLOAT = 6,
1014 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1015 NONSTATIC_BYTE, // T_BYTE = 8,
1016 NONSTATIC_SHORT, // T_SHORT = 9,
1017 NONSTATIC_WORD, // T_INT = 10,
1018 NONSTATIC_DOUBLE, // T_LONG = 11,
1019 NONSTATIC_OOP, // T_OBJECT = 12,
1020 NONSTATIC_OOP, // T_ARRAY = 13,
1021 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1022 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1023 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1024 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1025 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1026 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1027 BAD_ALLOCATION_TYPE, // 0
1028 BAD_ALLOCATION_TYPE, // 1
1029 BAD_ALLOCATION_TYPE, // 2
1030 BAD_ALLOCATION_TYPE, // 3
1031 STATIC_BYTE , // T_BOOLEAN = 4,
1032 STATIC_SHORT, // T_CHAR = 5,
1033 STATIC_WORD, // T_FLOAT = 6,
1034 STATIC_DOUBLE, // T_DOUBLE = 7,
1035 STATIC_BYTE, // T_BYTE = 8,
1036 STATIC_SHORT, // T_SHORT = 9,
1037 STATIC_WORD, // T_INT = 10,
1038 STATIC_DOUBLE, // T_LONG = 11,
1039 STATIC_OOP, // T_OBJECT = 12,
1040 STATIC_OOP, // T_ARRAY = 13,
1041 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1042 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1043 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1044 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1045 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1046 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1047 };
1048
1049 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1050 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1051 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1052 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1053 return result;
1054 }
1055
1056 class FieldAllocationCount: public ResourceObj {
1057 public:
1058 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1059
1060 FieldAllocationCount() {
1061 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1062 count[i] = 0;
1063 }
1064 }
1065
1066 FieldAllocationType update(bool is_static, BasicType type) {
1067 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1068 // Make sure there is no overflow with injected fields.
1069 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1070 count[atype]++;
1071 return atype;
1072 }
1073 };
1074
1075 Array<u2>* ClassFileParser::parse_fields(ClassLoaderData* loader_data,
1076 Symbol* class_name,
1077 constantPoolHandle cp, bool is_interface,
1078 FieldAllocationCount *fac,
1079 Array<AnnotationArray*>** fields_annotations,
1080 u2* java_fields_count_ptr, TRAPS) {
1081 ClassFileStream* cfs = stream();
1082 cfs->guarantee_more(2, CHECK_NULL); // length
1083 u2 length = cfs->get_u2_fast();
1084 *java_fields_count_ptr = length;
1085
1086 int num_injected = 0;
1087 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1088 int total_fields = length + num_injected;
1089
1090 // The field array starts with tuples of shorts
1091 // [access, name index, sig index, initial value index, byte offset].
1092 // A generic signature slot only exists for field with generic
1093 // signature attribute. And the access flag is set with
1094 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1095 // signature slots are at the end of the field array and after all
1096 // other fields data.
1097 //
1098 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1099 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1100 // ...
1101 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1102 // [generic signature index]
1103 // [generic signature index]
1104 // ...
1105 //
1106 // Allocate a temporary resource array for field data. For each field,
1107 // a slot is reserved in the temporary array for the generic signature
1108 // index. After parsing all fields, the data are copied to a permanent
1109 // array and any unused slots will be discarded.
1110 ResourceMark rm(THREAD);
1111 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1112 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1113
1114 AnnotationArray* field_annotations = NULL;
1115 // The generic signature slots start after all other fields' data.
1116 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1117 int num_generic_signature = 0;
1118 for (int n = 0; n < length; n++) {
1119 cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count
1120
1121 AccessFlags access_flags;
1122 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1123 verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1124 access_flags.set_flags(flags);
1125
1126 u2 name_index = cfs->get_u2_fast();
1127 int cp_size = cp->length();
1128 check_property(
1129 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1130 "Invalid constant pool index %u for field name in class file %s",
1131 name_index, CHECK_NULL);
1132 Symbol* name = cp->symbol_at(name_index);
1133 verify_legal_field_name(name, CHECK_NULL);
1134
1135 u2 signature_index = cfs->get_u2_fast();
1136 check_property(
1137 valid_cp_range(signature_index, cp_size) &&
1138 cp->tag_at(signature_index).is_utf8(),
1139 "Invalid constant pool index %u for field signature in class file %s",
1140 signature_index, CHECK_NULL);
1141 Symbol* sig = cp->symbol_at(signature_index);
1142 verify_legal_field_signature(name, sig, CHECK_NULL);
1143
1144 u2 constantvalue_index = 0;
1145 bool is_synthetic = false;
1146 u2 generic_signature_index = 0;
1147 bool is_static = access_flags.is_static();
1148 FieldAnnotationCollector parsed_annotations;
1149
1150 u2 attributes_count = cfs->get_u2_fast();
1151 if (attributes_count > 0) {
1152 parse_field_attributes(loader_data,
1153 cp, attributes_count, is_static, signature_index,
1154 &constantvalue_index, &is_synthetic,
1155 &generic_signature_index, &field_annotations,
1156 &parsed_annotations,
1157 CHECK_NULL);
1158 if (field_annotations != NULL) {
1159 if (*fields_annotations == NULL) {
1160 *fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1161 loader_data, length, NULL,
1162 CHECK_NULL);
1163 }
1164 (*fields_annotations)->at_put(n, field_annotations);
1165 }
1166 if (is_synthetic) {
1167 access_flags.set_is_synthetic();
1168 }
1169 if (generic_signature_index != 0) {
1170 access_flags.set_field_has_generic_signature();
1171 fa[generic_signature_slot] = generic_signature_index;
1172 generic_signature_slot ++;
1173 num_generic_signature ++;
1174 }
1175 }
1176
1177 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1178 field->initialize(access_flags.as_short(),
1179 name_index,
1180 signature_index,
1181 constantvalue_index,
1182 0);
1183 if (parsed_annotations.has_any_annotations())
1184 parsed_annotations.apply_to(field);
1185
1186 BasicType type = cp->basic_type_for_signature_at(signature_index);
1187
1188 // Remember how many oops we encountered and compute allocation type
1189 FieldAllocationType atype = fac->update(is_static, type);
1190
1191 // The correct offset is computed later (all oop fields will be located together)
1192 // We temporarily store the allocation type in the offset field
1193 field->set_offset(atype);
1194 }
1195
1196 int index = length;
1197 if (num_injected != 0) {
1198 for (int n = 0; n < num_injected; n++) {
1199 // Check for duplicates
1200 if (injected[n].may_be_java) {
1201 Symbol* name = injected[n].name();
1202 Symbol* signature = injected[n].signature();
1203 bool duplicate = false;
1204 for (int i = 0; i < length; i++) {
1205 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1206 if (name == cp->symbol_at(f->name_index()) &&
1207 signature == cp->symbol_at(f->signature_index())) {
1208 // Symbol is desclared in Java so skip this one
1209 duplicate = true;
1210 break;
1211 }
1212 }
1213 if (duplicate) {
1214 // These will be removed from the field array at the end
1215 continue;
1216 }
1217 }
1218
1219 // Injected field
1220 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1221 field->initialize(JVM_ACC_FIELD_INTERNAL,
1222 injected[n].name_index,
1223 injected[n].signature_index,
1224 0,
1225 0);
1226
1227 BasicType type = FieldType::basic_type(injected[n].signature());
1228
1229 // Remember how many oops we encountered and compute allocation type
1230 FieldAllocationType atype = fac->update(false, type);
1231
1232 // The correct offset is computed later (all oop fields will be located together)
1233 // We temporarily store the allocation type in the offset field
1234 field->set_offset(atype);
1235 index++;
1236 }
1237 }
1238
1239 // Now copy the fields' data from the temporary resource array.
1240 // Sometimes injected fields already exist in the Java source so
1241 // the fields array could be too long. In that case the
1242 // fields array is trimed. Also unused slots that were reserved
1243 // for generic signature indexes are discarded.
1244 Array<u2>* fields = MetadataFactory::new_array<u2>(
1245 loader_data, index * FieldInfo::field_slots + num_generic_signature,
1246 CHECK_NULL);
1247 {
1248 int i = 0;
1249 for (; i < index * FieldInfo::field_slots; i++) {
1250 fields->at_put(i, fa[i]);
1251 }
1252 for (int j = total_fields * FieldInfo::field_slots;
1253 j < generic_signature_slot; j++) {
1254 fields->at_put(i++, fa[j]);
1255 }
1256 assert(i == fields->length(), "");
1257 }
1258
1259 if (_need_verify && length > 1) {
1260 // Check duplicated fields
1261 ResourceMark rm(THREAD);
1262 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1263 THREAD, NameSigHash*, HASH_ROW_SIZE);
1264 initialize_hashtable(names_and_sigs);
1265 bool dup = false;
1266 {
1267 debug_only(No_Safepoint_Verifier nsv;)
1268 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1269 Symbol* name = fs.name();
1270 Symbol* sig = fs.signature();
1271 // If no duplicates, add name/signature in hashtable names_and_sigs.
1272 if (!put_after_lookup(name, sig, names_and_sigs)) {
1273 dup = true;
1274 break;
1275 }
1276 }
1277 }
1278 if (dup) {
1279 classfile_parse_error("Duplicate field name&signature in class file %s",
1280 CHECK_NULL);
1281 }
1282 }
1283
1284 return fields;
1285 }
1286
1287
1288 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1289 while (length-- > 0) {
1290 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1291 }
1292 }
1293
1294
1295 u2* ClassFileParser::parse_exception_table(ClassLoaderData* loader_data,
1296 u4 code_length,
1297 u4 exception_table_length,
1298 constantPoolHandle cp,
1299 TRAPS) {
1300 ClassFileStream* cfs = stream();
1301
1302 u2* exception_table_start = cfs->get_u2_buffer();
1303 assert(exception_table_start != NULL, "null exception table");
1304 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1305 // Will check legal target after parsing code array in verifier.
1306 if (_need_verify) {
1307 for (unsigned int i = 0; i < exception_table_length; i++) {
1308 u2 start_pc = cfs->get_u2_fast();
1309 u2 end_pc = cfs->get_u2_fast();
1310 u2 handler_pc = cfs->get_u2_fast();
1311 u2 catch_type_index = cfs->get_u2_fast();
1312 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1313 "Illegal exception table range in class file %s",
1314 CHECK_NULL);
1315 guarantee_property(handler_pc < code_length,
1316 "Illegal exception table handler in class file %s",
1317 CHECK_NULL);
1318 if (catch_type_index != 0) {
1319 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1320 is_klass_reference(cp, catch_type_index),
1321 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1322 }
1323 }
1324 } else {
1325 cfs->skip_u2_fast(exception_table_length * 4);
1326 }
1327 return exception_table_start;
1328 }
1329
1330 void ClassFileParser::parse_linenumber_table(
1331 u4 code_attribute_length, u4 code_length,
1332 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1333 ClassFileStream* cfs = stream();
1334 unsigned int num_entries = cfs->get_u2(CHECK);
1335
1336 // Each entry is a u2 start_pc, and a u2 line_number
1337 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1338
1339 // Verify line number attribute and table length
1340 check_property(
1341 code_attribute_length == sizeof(u2) + length_in_bytes,
1342 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1343
1344 cfs->guarantee_more(length_in_bytes, CHECK);
1345
1346 if ((*write_stream) == NULL) {
1347 if (length_in_bytes > fixed_buffer_size) {
1348 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1349 } else {
1350 (*write_stream) = new CompressedLineNumberWriteStream(
1351 linenumbertable_buffer, fixed_buffer_size);
1352 }
1353 }
1354
1355 while (num_entries-- > 0) {
1356 u2 bci = cfs->get_u2_fast(); // start_pc
1357 u2 line = cfs->get_u2_fast(); // line_number
1358 guarantee_property(bci < code_length,
1359 "Invalid pc in LineNumberTable in class file %s", CHECK);
1360 (*write_stream)->write_pair(bci, line);
1361 }
1362 }
1363
1364
1365 // Class file LocalVariableTable elements.
1366 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1367 public:
1368 u2 start_bci;
1369 u2 length;
1370 u2 name_cp_index;
1371 u2 descriptor_cp_index;
1372 u2 slot;
1373 };
1374
1375
1376 class LVT_Hash: public CHeapObj<mtClass> {
1377 public:
1378 LocalVariableTableElement *_elem; // element
1379 LVT_Hash* _next; // Next entry in hash table
1380 };
1381
1382 unsigned int hash(LocalVariableTableElement *elem) {
1383 unsigned int raw_hash = elem->start_bci;
1384
1385 raw_hash = elem->length + raw_hash * 37;
1386 raw_hash = elem->name_cp_index + raw_hash * 37;
1387 raw_hash = elem->slot + raw_hash * 37;
1388
1389 return raw_hash % HASH_ROW_SIZE;
1390 }
1391
1392 void initialize_hashtable(LVT_Hash** table) {
1393 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1394 table[i] = NULL;
1395 }
1396 }
1397
1398 void clear_hashtable(LVT_Hash** table) {
1399 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1400 LVT_Hash* current = table[i];
1401 LVT_Hash* next;
1402 while (current != NULL) {
1403 next = current->_next;
1404 current->_next = NULL;
1405 delete(current);
1406 current = next;
1407 }
1408 table[i] = NULL;
1409 }
1410 }
1411
1412 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1413 LVT_Hash* entry = table[index];
1414
1415 /*
1416 * 3-tuple start_bci/length/slot has to be unique key,
1417 * so the following comparison seems to be redundant:
1418 * && elem->name_cp_index == entry->_elem->name_cp_index
1419 */
1420 while (entry != NULL) {
1421 if (elem->start_bci == entry->_elem->start_bci
1422 && elem->length == entry->_elem->length
1423 && elem->name_cp_index == entry->_elem->name_cp_index
1424 && elem->slot == entry->_elem->slot
1425 ) {
1426 return entry;
1427 }
1428 entry = entry->_next;
1429 }
1430 return NULL;
1431 }
1432
1433 // Return false if the local variable is found in table.
1434 // Return true if no duplicate is found.
1435 // And local variable is added as a new entry in table.
1436 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1437 // First lookup for duplicates
1438 int index = hash(elem);
1439 LVT_Hash* entry = LVT_lookup(elem, index, table);
1440
1441 if (entry != NULL) {
1442 return false;
1443 }
1444 // No duplicate is found, allocate a new entry and fill it.
1445 if ((entry = new LVT_Hash()) == NULL) {
1446 return false;
1447 }
1448 entry->_elem = elem;
1449
1450 // Insert into hash table
1451 entry->_next = table[index];
1452 table[index] = entry;
1453
1454 return true;
1455 }
1456
1457 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1458 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1459 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1460 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1461 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1462 lvt->signature_cp_index = 0;
1463 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1464 }
1465
1466 // Function is used to parse both attributes:
1467 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1468 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1469 u2 max_locals,
1470 u4 code_attribute_length,
1471 constantPoolHandle cp,
1472 u2* localvariable_table_length,
1473 bool isLVTT,
1474 TRAPS) {
1475 ClassFileStream* cfs = stream();
1476 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1477 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1478 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1479 // Verify local variable table attribute has right length
1480 if (_need_verify) {
1481 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1482 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1483 }
1484 u2* localvariable_table_start = cfs->get_u2_buffer();
1485 assert(localvariable_table_start != NULL, "null local variable table");
1486 if (!_need_verify) {
1487 cfs->skip_u2_fast(size);
1488 } else {
1489 cfs->guarantee_more(size * 2, CHECK_NULL);
1490 for(int i = 0; i < (*localvariable_table_length); i++) {
1491 u2 start_pc = cfs->get_u2_fast();
1492 u2 length = cfs->get_u2_fast();
1493 u2 name_index = cfs->get_u2_fast();
1494 u2 descriptor_index = cfs->get_u2_fast();
1495 u2 index = cfs->get_u2_fast();
1496 // Assign to a u4 to avoid overflow
1497 u4 end_pc = (u4)start_pc + (u4)length;
1498
1499 if (start_pc >= code_length) {
1500 classfile_parse_error(
1501 "Invalid start_pc %u in %s in class file %s",
1502 start_pc, tbl_name, CHECK_NULL);
1503 }
1504 if (end_pc > code_length) {
1505 classfile_parse_error(
1506 "Invalid length %u in %s in class file %s",
1507 length, tbl_name, CHECK_NULL);
1508 }
1509 int cp_size = cp->length();
1510 guarantee_property(
1511 valid_cp_range(name_index, cp_size) &&
1512 cp->tag_at(name_index).is_utf8(),
1513 "Name index %u in %s has bad constant type in class file %s",
1514 name_index, tbl_name, CHECK_NULL);
1515 guarantee_property(
1516 valid_cp_range(descriptor_index, cp_size) &&
1517 cp->tag_at(descriptor_index).is_utf8(),
1518 "Signature index %u in %s has bad constant type in class file %s",
1519 descriptor_index, tbl_name, CHECK_NULL);
1520
1521 Symbol* name = cp->symbol_at(name_index);
1522 Symbol* sig = cp->symbol_at(descriptor_index);
1523 verify_legal_field_name(name, CHECK_NULL);
1524 u2 extra_slot = 0;
1525 if (!isLVTT) {
1526 verify_legal_field_signature(name, sig, CHECK_NULL);
1527
1528 // 4894874: check special cases for double and long local variables
1529 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1530 sig == vmSymbols::type_signature(T_LONG)) {
1531 extra_slot = 1;
1532 }
1533 }
1534 guarantee_property((index + extra_slot) < max_locals,
1535 "Invalid index %u in %s in class file %s",
1536 index, tbl_name, CHECK_NULL);
1537 }
1538 }
1539 return localvariable_table_start;
1540 }
1541
1542
1543 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1544 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1545 ClassFileStream* cfs = stream();
1546 u2 index = 0; // index in the array with long/double occupying two slots
1547 u4 i1 = *u1_index;
1548 u4 i2 = *u2_index + 1;
1549 for(int i = 0; i < array_length; i++) {
1550 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1551 index++;
1552 if (tag == ITEM_Long || tag == ITEM_Double) {
1553 index++;
1554 } else if (tag == ITEM_Object) {
1555 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1556 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1557 is_klass_reference(cp, class_index),
1558 "Bad class index %u in StackMap in class file %s",
1559 class_index, CHECK);
1560 } else if (tag == ITEM_Uninitialized) {
1561 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1562 guarantee_property(
1563 offset < code_length,
1564 "Bad uninitialized type offset %u in StackMap in class file %s",
1565 offset, CHECK);
1566 } else {
1567 guarantee_property(
1568 tag <= (u1)ITEM_Uninitialized,
1569 "Unknown variable type %u in StackMap in class file %s",
1570 tag, CHECK);
1571 }
1572 }
1573 u2_array[*u2_index] = index;
1574 *u1_index = i1;
1575 *u2_index = i2;
1576 }
1577
1578 Array<u1>* ClassFileParser::parse_stackmap_table(
1579 ClassLoaderData* loader_data,
1580 u4 code_attribute_length, TRAPS) {
1581 if (code_attribute_length == 0)
1582 return NULL;
1583
1584 ClassFileStream* cfs = stream();
1585 u1* stackmap_table_start = cfs->get_u1_buffer();
1586 assert(stackmap_table_start != NULL, "null stackmap table");
1587
1588 // check code_attribute_length first
1589 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1590
1591 if (!_need_verify && !DumpSharedSpaces) {
1592 return NULL;
1593 }
1594
1595 Array<u1>* stackmap_data =
1596 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL);
1597
1598 memcpy((void*)stackmap_data->adr_at(0),
1599 (void*)stackmap_table_start, code_attribute_length);
1600 return stackmap_data;
1601 }
1602
1603 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1604 u4 method_attribute_length,
1605 constantPoolHandle cp, TRAPS) {
1606 ClassFileStream* cfs = stream();
1607 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1608 *checked_exceptions_length = cfs->get_u2_fast();
1609 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1610 u2* checked_exceptions_start = cfs->get_u2_buffer();
1611 assert(checked_exceptions_start != NULL, "null checked exceptions");
1612 if (!_need_verify) {
1613 cfs->skip_u2_fast(size);
1614 } else {
1615 // Verify each value in the checked exception table
1616 u2 checked_exception;
1617 u2 len = *checked_exceptions_length;
1618 cfs->guarantee_more(2 * len, CHECK_NULL);
1619 for (int i = 0; i < len; i++) {
1620 checked_exception = cfs->get_u2_fast();
1621 check_property(
1622 valid_cp_range(checked_exception, cp->length()) &&
1623 is_klass_reference(cp, checked_exception),
1624 "Exception name has bad type at constant pool %u in class file %s",
1625 checked_exception, CHECK_NULL);
1626 }
1627 }
1628 // check exceptions attribute length
1629 if (_need_verify) {
1630 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1631 sizeof(u2) * size),
1632 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1633 }
1634 return checked_exceptions_start;
1635 }
1636
1637 void ClassFileParser::throwIllegalSignature(
1638 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1639 ResourceMark rm(THREAD);
1640 Exceptions::fthrow(THREAD_AND_LOCATION,
1641 vmSymbols::java_lang_ClassFormatError(),
1642 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1643 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1644 }
1645
1646 // Skip an annotation. Return >=limit if there is any problem.
1647 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1648 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1649 // value := switch (tag:u1) { ... }
1650 index += 2; // skip atype
1651 if ((index += 2) >= limit) return limit; // read nmem
1652 int nmem = Bytes::get_Java_u2(buffer+index-2);
1653 while (--nmem >= 0 && index < limit) {
1654 index += 2; // skip member
1655 index = skip_annotation_value(buffer, limit, index);
1656 }
1657 return index;
1658 }
1659
1660 // Skip an annotation value. Return >=limit if there is any problem.
1661 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1662 // value := switch (tag:u1) {
1663 // case B, C, I, S, Z, D, F, J, c: con:u2;
1664 // case e: e_class:u2 e_name:u2;
1665 // case s: s_con:u2;
1666 // case [: do(nval:u2) {value};
1667 // case @: annotation;
1668 // case s: s_con:u2;
1669 // }
1670 if ((index += 1) >= limit) return limit; // read tag
1671 u1 tag = buffer[index-1];
1672 switch (tag) {
1673 case 'B': case 'C': case 'I': case 'S': case 'Z':
1674 case 'D': case 'F': case 'J': case 'c': case 's':
1675 index += 2; // skip con or s_con
1676 break;
1677 case 'e':
1678 index += 4; // skip e_class, e_name
1679 break;
1680 case '[':
1681 {
1682 if ((index += 2) >= limit) return limit; // read nval
1683 int nval = Bytes::get_Java_u2(buffer+index-2);
1684 while (--nval >= 0 && index < limit) {
1685 index = skip_annotation_value(buffer, limit, index);
1686 }
1687 }
1688 break;
1689 case '@':
1690 index = skip_annotation(buffer, limit, index);
1691 break;
1692 default:
1693 assert(false, "annotation tag");
1694 return limit; // bad tag byte
1695 }
1696 return index;
1697 }
1698
1699 // Sift through annotations, looking for those significant to the VM:
1700 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1701 constantPoolHandle cp,
1702 ClassFileParser::AnnotationCollector* coll,
1703 TRAPS) {
1704 // annotations := do(nann:u2) {annotation}
1705 int index = 0;
1706 if ((index += 2) >= limit) return; // read nann
1707 int nann = Bytes::get_Java_u2(buffer+index-2);
1708 enum { // initial annotation layout
1709 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1710 count_off = 2, // u2 such as 1 (one value)
1711 member_off = 4, // utf8 such as 'value'
1712 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1713 e_tag_val = 'e',
1714 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1715 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1716 e_size = 11, // end of 'e' annotation
1717 c_tag_val = 'c',
1718 c_con_off = 7, // utf8 payload, such as 'I' or 'Ljava/lang/String;'
1719 c_size = 9, // end of 'c' annotation
1720 min_size = 6 // smallest possible size (zero members)
1721 };
1722 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1723 int index0 = index;
1724 index = skip_annotation(buffer, limit, index);
1725 u1* abase = buffer + index0;
1726 int atype = Bytes::get_Java_u2(abase + atype_off);
1727 int count = Bytes::get_Java_u2(abase + count_off);
1728 Symbol* aname = check_symbol_at(cp, atype);
1729 if (aname == NULL) break; // invalid annotation name
1730 Symbol* member = NULL;
1731 if (count >= 1) {
1732 int member_index = Bytes::get_Java_u2(abase + member_off);
1733 member = check_symbol_at(cp, member_index);
1734 if (member == NULL) break; // invalid member name
1735 }
1736
1737 // Here is where parsing particular annotations will take place.
1738 AnnotationCollector::ID id = coll->annotation_index(aname);
1739 if (id == AnnotationCollector::_unknown) continue;
1740 coll->set_annotation(id);
1741 // If there are no values, just set the bit and move on:
1742 if (count == 0) continue;
1743
1744 // For the record, here is how annotation payloads can be collected.
1745 // Suppose we want to capture @Retention.value. Here is how:
1746 //if (id == AnnotationCollector::_class_Retention) {
1747 // Symbol* payload = NULL;
1748 // if (count == 1
1749 // && e_size == (index0 - index) // match size
1750 // && e_tag_val == *(abase + tag_off)
1751 // && (check_symbol_at(cp, Bytes::get_Java_u2(abase + e_type_off))
1752 // == vmSymbols::RetentionPolicy_signature())
1753 // && member == vmSymbols::value_name()) {
1754 // payload = check_symbol_at(cp, Bytes::get_Java_u2(abase + e_con_off));
1755 // }
1756 // check_property(payload != NULL,
1757 // "Invalid @Retention annotation at offset %u in class file %s",
1758 // index0, CHECK);
1759 // if (payload != NULL) {
1760 // payload->increment_refcount();
1761 // coll->_class_RetentionPolicy = payload;
1762 // }
1763 //}
1764 }
1765 }
1766
1767 ClassFileParser::AnnotationCollector::ID ClassFileParser::AnnotationCollector::annotation_index(Symbol* name) {
1768 vmSymbols::SID sid = vmSymbols::find_sid(name);
1769 switch (sid) {
1770 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1771 if (_location != _in_method) break; // only allow for methods
1772 return _method_ForceInline;
1773 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1774 if (_location != _in_method) break; // only allow for methods
1775 return _method_DontInline;
1776 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1777 if (_location != _in_method) break; // only allow for methods
1778 return _method_LambdaForm_Compiled;
1779 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1780 if (_location != _in_method) break; // only allow for methods
1781 return _method_LambdaForm_Hidden;
1782 default: break;
1783 }
1784 return AnnotationCollector::_unknown;
1785 }
1786
1787 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1788 fatal("no field annotations yet");
1789 }
1790
1791 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1792 if (has_annotation(_method_ForceInline))
1793 m->set_force_inline(true);
1794 if (has_annotation(_method_DontInline))
1795 m->set_dont_inline(true);
1796 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1797 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1798 if (has_annotation(_method_LambdaForm_Hidden))
1799 m->set_hidden(true);
1800 }
1801
1802 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1803 fatal("no class annotations yet");
1804 }
1805
1806
1807 #define MAX_ARGS_SIZE 255
1808 #define MAX_CODE_SIZE 65535
1809 #define INITIAL_MAX_LVT_NUMBER 256
1810
1811 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1812 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1813 // Method* to save footprint, so we only know the size of the resulting Method* when the
1814 // entire method attribute is parsed.
1815 //
1816 // The promoted_flags parameter is used to pass relevant access_flags
1817 // from the method back up to the containing klass. These flag values
1818 // are added to klass's access_flags.
1819
1820 methodHandle ClassFileParser::parse_method(ClassLoaderData* loader_data,
1821 constantPoolHandle cp,
1822 bool is_interface,
1823 AccessFlags *promoted_flags,
1824 AnnotationArray** method_annotations,
1825 AnnotationArray** method_parameter_annotations,
1826 AnnotationArray** method_default_annotations,
1827 TRAPS) {
1828 ClassFileStream* cfs = stream();
1829 methodHandle nullHandle;
1830 ResourceMark rm(THREAD);
1831 // Parse fixed parts
1832 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1833
1834 int flags = cfs->get_u2_fast();
1835 u2 name_index = cfs->get_u2_fast();
1836 int cp_size = cp->length();
1837 check_property(
1838 valid_cp_range(name_index, cp_size) &&
1839 cp->tag_at(name_index).is_utf8(),
1840 "Illegal constant pool index %u for method name in class file %s",
1841 name_index, CHECK_(nullHandle));
1842 Symbol* name = cp->symbol_at(name_index);
1843 verify_legal_method_name(name, CHECK_(nullHandle));
1844
1845 u2 signature_index = cfs->get_u2_fast();
1846 guarantee_property(
1847 valid_cp_range(signature_index, cp_size) &&
1848 cp->tag_at(signature_index).is_utf8(),
1849 "Illegal constant pool index %u for method signature in class file %s",
1850 signature_index, CHECK_(nullHandle));
1851 Symbol* signature = cp->symbol_at(signature_index);
1852
1853 AccessFlags access_flags;
1854 if (name == vmSymbols::class_initializer_name()) {
1855 // We ignore the other access flags for a valid class initializer.
1856 // (JVM Spec 2nd ed., chapter 4.6)
1857 if (_major_version < 51) { // backward compatibility
1858 flags = JVM_ACC_STATIC;
1859 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1860 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1861 }
1862 } else {
1863 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1864 }
1865
1866 int args_size = -1; // only used when _need_verify is true
1867 if (_need_verify) {
1868 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1869 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1870 if (args_size > MAX_ARGS_SIZE) {
1871 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1872 }
1873 }
1874
1875 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1876
1877 // Default values for code and exceptions attribute elements
1878 u2 max_stack = 0;
1879 u2 max_locals = 0;
1880 u4 code_length = 0;
1881 u1* code_start = 0;
1882 u2 exception_table_length = 0;
1883 u2* exception_table_start = NULL;
1884 Array<int>* exception_handlers = Universe::the_empty_int_array();
1885 u2 checked_exceptions_length = 0;
1886 u2* checked_exceptions_start = NULL;
1887 CompressedLineNumberWriteStream* linenumber_table = NULL;
1888 int linenumber_table_length = 0;
1889 int total_lvt_length = 0;
1890 u2 lvt_cnt = 0;
1891 u2 lvtt_cnt = 0;
1892 bool lvt_allocated = false;
1893 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1894 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1895 u2* localvariable_table_length;
1896 u2** localvariable_table_start;
1897 u2* localvariable_type_table_length;
1898 u2** localvariable_type_table_start;
1899 bool parsed_code_attribute = false;
1900 bool parsed_checked_exceptions_attribute = false;
1901 bool parsed_stackmap_attribute = false;
1902 // stackmap attribute - JDK1.5
1903 Array<u1>* stackmap_data = NULL;
1904 u2 generic_signature_index = 0;
1905 MethodAnnotationCollector parsed_annotations;
1906 u1* runtime_visible_annotations = NULL;
1907 int runtime_visible_annotations_length = 0;
1908 u1* runtime_invisible_annotations = NULL;
1909 int runtime_invisible_annotations_length = 0;
1910 u1* runtime_visible_parameter_annotations = NULL;
1911 int runtime_visible_parameter_annotations_length = 0;
1912 u1* runtime_invisible_parameter_annotations = NULL;
1913 int runtime_invisible_parameter_annotations_length = 0;
1914 u1* annotation_default = NULL;
1915 int annotation_default_length = 0;
1916
1917 // Parse code and exceptions attribute
1918 u2 method_attributes_count = cfs->get_u2_fast();
1919 while (method_attributes_count--) {
1920 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1921 u2 method_attribute_name_index = cfs->get_u2_fast();
1922 u4 method_attribute_length = cfs->get_u4_fast();
1923 check_property(
1924 valid_cp_range(method_attribute_name_index, cp_size) &&
1925 cp->tag_at(method_attribute_name_index).is_utf8(),
1926 "Invalid method attribute name index %u in class file %s",
1927 method_attribute_name_index, CHECK_(nullHandle));
1928
1929 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1930 if (method_attribute_name == vmSymbols::tag_code()) {
1931 // Parse Code attribute
1932 if (_need_verify) {
1933 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1934 "Code attribute in native or abstract methods in class file %s",
1935 CHECK_(nullHandle));
1936 }
1937 if (parsed_code_attribute) {
1938 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1939 }
1940 parsed_code_attribute = true;
1941
1942 // Stack size, locals size, and code size
1943 if (_major_version == 45 && _minor_version <= 2) {
1944 cfs->guarantee_more(4, CHECK_(nullHandle));
1945 max_stack = cfs->get_u1_fast();
1946 max_locals = cfs->get_u1_fast();
1947 code_length = cfs->get_u2_fast();
1948 } else {
1949 cfs->guarantee_more(8, CHECK_(nullHandle));
1950 max_stack = cfs->get_u2_fast();
1951 max_locals = cfs->get_u2_fast();
1952 code_length = cfs->get_u4_fast();
1953 }
1954 if (_need_verify) {
1955 guarantee_property(args_size <= max_locals,
1956 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1957 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1958 "Invalid method Code length %u in class file %s",
1959 code_length, CHECK_(nullHandle));
1960 }
1961 // Code pointer
1962 code_start = cfs->get_u1_buffer();
1963 assert(code_start != NULL, "null code start");
1964 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1965 cfs->skip_u1_fast(code_length);
1966
1967 // Exception handler table
1968 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1969 exception_table_length = cfs->get_u2_fast();
1970 if (exception_table_length > 0) {
1971 exception_table_start =
1972 parse_exception_table(loader_data, code_length, exception_table_length, cp, CHECK_(nullHandle));
1973 }
1974
1975 // Parse additional attributes in code attribute
1976 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1977 u2 code_attributes_count = cfs->get_u2_fast();
1978
1979 unsigned int calculated_attribute_length = 0;
1980
1981 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1982 calculated_attribute_length =
1983 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1984 } else {
1985 // max_stack, locals and length are smaller in pre-version 45.2 classes
1986 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1987 }
1988 calculated_attribute_length +=
1989 code_length +
1990 sizeof(exception_table_length) +
1991 sizeof(code_attributes_count) +
1992 exception_table_length *
1993 ( sizeof(u2) + // start_pc
1994 sizeof(u2) + // end_pc
1995 sizeof(u2) + // handler_pc
1996 sizeof(u2) ); // catch_type_index
1997
1998 while (code_attributes_count--) {
1999 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
2000 u2 code_attribute_name_index = cfs->get_u2_fast();
2001 u4 code_attribute_length = cfs->get_u4_fast();
2002 calculated_attribute_length += code_attribute_length +
2003 sizeof(code_attribute_name_index) +
2004 sizeof(code_attribute_length);
2005 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
2006 cp->tag_at(code_attribute_name_index).is_utf8(),
2007 "Invalid code attribute name index %u in class file %s",
2008 code_attribute_name_index,
2009 CHECK_(nullHandle));
2010 if (LoadLineNumberTables &&
2011 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2012 // Parse and compress line number table
2013 parse_linenumber_table(code_attribute_length, code_length,
2014 &linenumber_table, CHECK_(nullHandle));
2015
2016 } else if (LoadLocalVariableTables &&
2017 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2018 // Parse local variable table
2019 if (!lvt_allocated) {
2020 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2021 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2022 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2023 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2024 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2025 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2026 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2027 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2028 lvt_allocated = true;
2029 }
2030 if (lvt_cnt == max_lvt_cnt) {
2031 max_lvt_cnt <<= 1;
2032 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2033 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2034 }
2035 localvariable_table_start[lvt_cnt] =
2036 parse_localvariable_table(code_length,
2037 max_locals,
2038 code_attribute_length,
2039 cp,
2040 &localvariable_table_length[lvt_cnt],
2041 false, // is not LVTT
2042 CHECK_(nullHandle));
2043 total_lvt_length += localvariable_table_length[lvt_cnt];
2044 lvt_cnt++;
2045 } else if (LoadLocalVariableTypeTables &&
2046 _major_version >= JAVA_1_5_VERSION &&
2047 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2048 if (!lvt_allocated) {
2049 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2050 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2051 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2052 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2053 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2054 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2055 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2056 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2057 lvt_allocated = true;
2058 }
2059 // Parse local variable type table
2060 if (lvtt_cnt == max_lvtt_cnt) {
2061 max_lvtt_cnt <<= 1;
2062 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2063 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2064 }
2065 localvariable_type_table_start[lvtt_cnt] =
2066 parse_localvariable_table(code_length,
2067 max_locals,
2068 code_attribute_length,
2069 cp,
2070 &localvariable_type_table_length[lvtt_cnt],
2071 true, // is LVTT
2072 CHECK_(nullHandle));
2073 lvtt_cnt++;
2074 } else if (UseSplitVerifier &&
2075 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2076 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2077 // Stack map is only needed by the new verifier in JDK1.5.
2078 if (parsed_stackmap_attribute) {
2079 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2080 }
2081 stackmap_data = parse_stackmap_table(loader_data, code_attribute_length, CHECK_(nullHandle));
2082 parsed_stackmap_attribute = true;
2083 } else {
2084 // Skip unknown attributes
2085 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2086 }
2087 }
2088 // check method attribute length
2089 if (_need_verify) {
2090 guarantee_property(method_attribute_length == calculated_attribute_length,
2091 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2092 }
2093 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2094 // Parse Exceptions attribute
2095 if (parsed_checked_exceptions_attribute) {
2096 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2097 }
2098 parsed_checked_exceptions_attribute = true;
2099 checked_exceptions_start =
2100 parse_checked_exceptions(&checked_exceptions_length,
2101 method_attribute_length,
2102 cp, CHECK_(nullHandle));
2103 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2104 if (method_attribute_length != 0) {
2105 classfile_parse_error(
2106 "Invalid Synthetic method attribute length %u in class file %s",
2107 method_attribute_length, CHECK_(nullHandle));
2108 }
2109 // Should we check that there hasn't already been a synthetic attribute?
2110 access_flags.set_is_synthetic();
2111 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2112 if (method_attribute_length != 0) {
2113 classfile_parse_error(
2114 "Invalid Deprecated method attribute length %u in class file %s",
2115 method_attribute_length, CHECK_(nullHandle));
2116 }
2117 } else if (_major_version >= JAVA_1_5_VERSION) {
2118 if (method_attribute_name == vmSymbols::tag_signature()) {
2119 if (method_attribute_length != 2) {
2120 classfile_parse_error(
2121 "Invalid Signature attribute length %u in class file %s",
2122 method_attribute_length, CHECK_(nullHandle));
2123 }
2124 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
2125 generic_signature_index = cfs->get_u2_fast();
2126 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2127 runtime_visible_annotations_length = method_attribute_length;
2128 runtime_visible_annotations = cfs->get_u1_buffer();
2129 assert(runtime_visible_annotations != NULL, "null visible annotations");
2130 parse_annotations(runtime_visible_annotations, runtime_visible_annotations_length, cp, &parsed_annotations, CHECK_(nullHandle));
2131 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2132 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2133 runtime_invisible_annotations_length = method_attribute_length;
2134 runtime_invisible_annotations = cfs->get_u1_buffer();
2135 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2136 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
2137 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2138 runtime_visible_parameter_annotations_length = method_attribute_length;
2139 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2140 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2141 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2142 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2143 runtime_invisible_parameter_annotations_length = method_attribute_length;
2144 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2145 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2146 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
2147 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2148 annotation_default_length = method_attribute_length;
2149 annotation_default = cfs->get_u1_buffer();
2150 assert(annotation_default != NULL, "null annotation default");
2151 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2152 } else {
2153 // Skip unknown attributes
2154 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2155 }
2156 } else {
2157 // Skip unknown attributes
2158 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2159 }
2160 }
2161
2162 if (linenumber_table != NULL) {
2163 linenumber_table->write_terminator();
2164 linenumber_table_length = linenumber_table->position();
2165 }
2166
2167 // Make sure there's at least one Code attribute in non-native/non-abstract method
2168 if (_need_verify) {
2169 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2170 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2171 }
2172
2173 // All sizing information for a Method* is finally available, now create it
2174 Method* m = Method::allocate(loader_data,
2175 code_length,
2176 access_flags,
2177 linenumber_table_length,
2178 total_lvt_length,
2179 exception_table_length,
2180 checked_exceptions_length,
2181 CHECK_(nullHandle));
2182
2183 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2184
2185 // Fill in information from fixed part (access_flags already set)
2186 m->set_constants(cp());
2187 m->set_name_index(name_index);
2188 m->set_signature_index(signature_index);
2189 m->set_generic_signature_index(generic_signature_index);
2190 #ifdef CC_INTERP
2191 // hmm is there a gc issue here??
2192 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2193 m->set_result_index(rtf.type());
2194 #endif
2195
2196 if (args_size >= 0) {
2197 m->set_size_of_parameters(args_size);
2198 } else {
2199 m->compute_size_of_parameters(THREAD);
2200 }
2201 #ifdef ASSERT
2202 if (args_size >= 0) {
2203 m->compute_size_of_parameters(THREAD);
2204 assert(args_size == m->size_of_parameters(), "");
2205 }
2206 #endif
2207
2208 // Fill in code attribute information
2209 m->set_max_stack(max_stack);
2210 m->set_max_locals(max_locals);
2211
2212 m->constMethod()->set_stackmap_data(stackmap_data);
2213
2214 // Copy byte codes
2215 m->set_code(code_start);
2216
2217 // Copy line number table
2218 if (linenumber_table != NULL) {
2219 memcpy(m->compressed_linenumber_table(),
2220 linenumber_table->buffer(), linenumber_table_length);
2221 }
2222
2223 // Copy exception table
2224 if (exception_table_length > 0) {
2225 int size =
2226 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2227 copy_u2_with_conversion((u2*) m->exception_table_start(),
2228 exception_table_start, size);
2229 }
2230
2231 // Copy checked exceptions
2232 if (checked_exceptions_length > 0) {
2233 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2234 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2235 }
2236
2237 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2238 *
2239 * Rules for LVT's and LVTT's are:
2240 * - There can be any number of LVT's and LVTT's.
2241 * - If there are n LVT's, it is the same as if there was just
2242 * one LVT containing all the entries from the n LVT's.
2243 * - There may be no more than one LVT entry per local variable.
2244 * Two LVT entries are 'equal' if these fields are the same:
2245 * start_pc, length, name, slot
2246 * - There may be no more than one LVTT entry per each LVT entry.
2247 * Each LVTT entry has to match some LVT entry.
2248 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2249 */
2250 if (total_lvt_length > 0) {
2251 int tbl_no, idx;
2252
2253 promoted_flags->set_has_localvariable_table();
2254
2255 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2256 initialize_hashtable(lvt_Hash);
2257
2258 // To fill LocalVariableTable in
2259 Classfile_LVT_Element* cf_lvt;
2260 LocalVariableTableElement* lvt = m->localvariable_table_start();
2261
2262 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2263 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2264 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2265 copy_lvt_element(&cf_lvt[idx], lvt);
2266 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2267 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2268 && _need_verify
2269 && _major_version >= JAVA_1_5_VERSION ) {
2270 clear_hashtable(lvt_Hash);
2271 classfile_parse_error("Duplicated LocalVariableTable attribute "
2272 "entry for '%s' in class file %s",
2273 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2274 CHECK_(nullHandle));
2275 }
2276 }
2277 }
2278
2279 // To merge LocalVariableTable and LocalVariableTypeTable
2280 Classfile_LVT_Element* cf_lvtt;
2281 LocalVariableTableElement lvtt_elem;
2282
2283 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2284 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2285 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2286 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2287 int index = hash(&lvtt_elem);
2288 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2289 if (entry == NULL) {
2290 if (_need_verify) {
2291 clear_hashtable(lvt_Hash);
2292 classfile_parse_error("LVTT entry for '%s' in class file %s "
2293 "does not match any LVT entry",
2294 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2295 CHECK_(nullHandle));
2296 }
2297 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2298 clear_hashtable(lvt_Hash);
2299 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2300 "entry for '%s' in class file %s",
2301 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2302 CHECK_(nullHandle));
2303 } else {
2304 // to add generic signatures into LocalVariableTable
2305 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2306 }
2307 }
2308 }
2309 clear_hashtable(lvt_Hash);
2310 }
2311
2312 if (parsed_annotations.has_any_annotations())
2313 parsed_annotations.apply_to(m);
2314 *method_annotations = assemble_annotations(loader_data,
2315 runtime_visible_annotations,
2316 runtime_visible_annotations_length,
2317 runtime_invisible_annotations,
2318 runtime_invisible_annotations_length,
2319 CHECK_(nullHandle));
2320 *method_parameter_annotations = assemble_annotations(loader_data,
2321 runtime_visible_parameter_annotations,
2322 runtime_visible_parameter_annotations_length,
2323 runtime_invisible_parameter_annotations,
2324 runtime_invisible_parameter_annotations_length,
2325 CHECK_(nullHandle));
2326 *method_default_annotations = assemble_annotations(loader_data,
2327 annotation_default,
2328 annotation_default_length,
2329 NULL,
2330 0,
2331 CHECK_(nullHandle));
2332
2333 if (name == vmSymbols::finalize_method_name() &&
2334 signature == vmSymbols::void_method_signature()) {
2335 if (m->is_empty_method()) {
2336 _has_empty_finalizer = true;
2337 } else {
2338 _has_finalizer = true;
2339 }
2340 }
2341 if (name == vmSymbols::object_initializer_name() &&
2342 signature == vmSymbols::void_method_signature() &&
2343 m->is_vanilla_constructor()) {
2344 _has_vanilla_constructor = true;
2345 }
2346
2347 return m;
2348 }
2349
2350
2351 // The promoted_flags parameter is used to pass relevant access_flags
2352 // from the methods back up to the containing klass. These flag values
2353 // are added to klass's access_flags.
2354
2355 Array<Method*>* ClassFileParser::parse_methods(ClassLoaderData* loader_data,
2356 constantPoolHandle cp,
2357 bool is_interface,
2358 AccessFlags* promoted_flags,
2359 bool* has_final_method,
2360 Array<AnnotationArray*>** methods_annotations,
2361 Array<AnnotationArray*>** methods_parameter_annotations,
2362 Array<AnnotationArray*>** methods_default_annotations,
2363 TRAPS) {
2364 ClassFileStream* cfs = stream();
2365 AnnotationArray* method_annotations = NULL;
2366 AnnotationArray* method_parameter_annotations = NULL;
2367 AnnotationArray* method_default_annotations = NULL;
2368 cfs->guarantee_more(2, CHECK_NULL); // length
2369 u2 length = cfs->get_u2_fast();
2370 if (length == 0) {
2371 return Universe::the_empty_method_array();
2372 } else {
2373 // FIXME: Handle leaks at later failures.
2374 Array<Method*>* methods = MetadataFactory::new_array<Method*>(loader_data, length, NULL, CHECK_NULL);
2375
2376 HandleMark hm(THREAD);
2377 for (int index = 0; index < length; index++) {
2378 methodHandle method = parse_method(loader_data,
2379 cp, is_interface,
2380 promoted_flags,
2381 &method_annotations,
2382 &method_parameter_annotations,
2383 &method_default_annotations,
2384 CHECK_NULL);
2385
2386 if (method->is_final()) {
2387 *has_final_method = true;
2388 }
2389 methods->at_put(index, method());
2390 if (*methods_annotations == NULL) {
2391 *methods_annotations =
2392 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2393 }
2394 (*methods_annotations)->at_put(index, method_annotations);
2395 if (*methods_parameter_annotations == NULL) {
2396 *methods_parameter_annotations =
2397 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2398 }
2399 (*methods_parameter_annotations)->at_put(index, method_parameter_annotations);
2400 if (*methods_default_annotations == NULL) {
2401 *methods_default_annotations =
2402 MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2403 }
2404 (*methods_default_annotations)->at_put(index, method_default_annotations);
2405 }
2406 if (_need_verify && length > 1) {
2407 // Check duplicated methods
2408 ResourceMark rm(THREAD);
2409 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2410 THREAD, NameSigHash*, HASH_ROW_SIZE);
2411 initialize_hashtable(names_and_sigs);
2412 bool dup = false;
2413 {
2414 debug_only(No_Safepoint_Verifier nsv;)
2415 for (int i = 0; i < length; i++) {
2416 Method* m = methods->at(i);
2417 // If no duplicates, add name/signature in hashtable names_and_sigs.
2418 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2419 dup = true;
2420 break;
2421 }
2422 }
2423 }
2424 if (dup) {
2425 classfile_parse_error("Duplicate method name&signature in class file %s",
2426 CHECK_NULL);
2427 }
2428 }
2429 return methods;
2430 }
2431 }
2432
2433
2434 Array<int>* ClassFileParser::sort_methods(ClassLoaderData* loader_data,
2435 Array<Method*>* methods,
2436 Array<AnnotationArray*>* methods_annotations,
2437 Array<AnnotationArray*>* methods_parameter_annotations,
2438 Array<AnnotationArray*>* methods_default_annotations,
2439 TRAPS) {
2440 int length = methods->length();
2441 // If JVMTI original method ordering or sharing is enabled we have to
2442 // remember the original class file ordering.
2443 // We temporarily use the vtable_index field in the Method* to store the
2444 // class file index, so we can read in after calling qsort.
2445 // Put the method ordering in the shared archive.
2446 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2447 for (int index = 0; index < length; index++) {
2448 Method* m = methods->at(index);
2449 assert(!m->valid_vtable_index(), "vtable index should not be set");
2450 m->set_vtable_index(index);
2451 }
2452 }
2453 // Sort method array by ascending method name (for faster lookups & vtable construction)
2454 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2455 Method::sort_methods(methods,
2456 methods_annotations,
2457 methods_parameter_annotations,
2458 methods_default_annotations);
2459
2460 // If JVMTI original method ordering or sharing is enabled construct int
2461 // array remembering the original ordering
2462 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2463 Array<int>* method_ordering = MetadataFactory::new_array<int>(loader_data, length, CHECK_NULL);
2464 for (int index = 0; index < length; index++) {
2465 Method* m = methods->at(index);
2466 int old_index = m->vtable_index();
2467 assert(old_index >= 0 && old_index < length, "invalid method index");
2468 method_ordering->at_put(index, old_index);
2469 m->set_vtable_index(Method::invalid_vtable_index);
2470 }
2471 return method_ordering;
2472 } else {
2473 return Universe::the_empty_int_array();
2474 }
2475 }
2476
2477
2478 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS) {
2479 ClassFileStream* cfs = stream();
2480 cfs->guarantee_more(2, CHECK); // sourcefile_index
2481 u2 sourcefile_index = cfs->get_u2_fast();
2482 check_property(
2483 valid_cp_range(sourcefile_index, cp->length()) &&
2484 cp->tag_at(sourcefile_index).is_utf8(),
2485 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2486 sourcefile_index, CHECK);
2487 set_class_sourcefile(cp->symbol_at(sourcefile_index));
2488 }
2489
2490
2491
2492 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2493 int length, TRAPS) {
2494 ClassFileStream* cfs = stream();
2495 u1* sde_buffer = cfs->get_u1_buffer();
2496 assert(sde_buffer != NULL, "null sde buffer");
2497
2498 // Don't bother storing it if there is no way to retrieve it
2499 if (JvmtiExport::can_get_source_debug_extension()) {
2500 assert((length+1) > length, "Overflow checking");
2501 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2502 for (int i = 0; i < length; i++) {
2503 sde[i] = sde_buffer[i];
2504 }
2505 sde[length] = '\0';
2506 set_class_sde_buffer((char*)sde, length);
2507 }
2508 // Got utf8 string, set stream position forward
2509 cfs->skip_u1(length, CHECK);
2510 }
2511
2512
2513 // Inner classes can be static, private or protected (classic VM does this)
2514 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2515
2516 // Return number of classes in the inner classes attribute table
2517 u2 ClassFileParser::parse_classfile_inner_classes_attribute(ClassLoaderData* loader_data,
2518 u1* inner_classes_attribute_start,
2519 bool parsed_enclosingmethod_attribute,
2520 u2 enclosing_method_class_index,
2521 u2 enclosing_method_method_index,
2522 constantPoolHandle cp,
2523 TRAPS) {
2524 ClassFileStream* cfs = stream();
2525 u1* current_mark = cfs->current();
2526 u2 length = 0;
2527 if (inner_classes_attribute_start != NULL) {
2528 cfs->set_current(inner_classes_attribute_start);
2529 cfs->guarantee_more(2, CHECK_0); // length
2530 length = cfs->get_u2_fast();
2531 }
2532
2533 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2534 // method data:
2535 // [inner_class_info_index,
2536 // outer_class_info_index,
2537 // inner_name_index,
2538 // inner_class_access_flags,
2539 // ...
2540 // enclosing_method_class_index,
2541 // enclosing_method_method_index]
2542 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2543 // FIXME: Will leak on exceptions.
2544 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(loader_data, size, CHECK_0);
2545 int index = 0;
2546 int cp_size = cp->length();
2547 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2548 for (int n = 0; n < length; n++) {
2549 // Inner class index
2550 u2 inner_class_info_index = cfs->get_u2_fast();
2551 check_property(
2552 inner_class_info_index == 0 ||
2553 (valid_cp_range(inner_class_info_index, cp_size) &&
2554 is_klass_reference(cp, inner_class_info_index)),
2555 "inner_class_info_index %u has bad constant type in class file %s",
2556 inner_class_info_index, CHECK_0);
2557 // Outer class index
2558 u2 outer_class_info_index = cfs->get_u2_fast();
2559 check_property(
2560 outer_class_info_index == 0 ||
2561 (valid_cp_range(outer_class_info_index, cp_size) &&
2562 is_klass_reference(cp, outer_class_info_index)),
2563 "outer_class_info_index %u has bad constant type in class file %s",
2564 outer_class_info_index, CHECK_0);
2565 // Inner class name
2566 u2 inner_name_index = cfs->get_u2_fast();
2567 check_property(
2568 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2569 cp->tag_at(inner_name_index).is_utf8()),
2570 "inner_name_index %u has bad constant type in class file %s",
2571 inner_name_index, CHECK_0);
2572 if (_need_verify) {
2573 guarantee_property(inner_class_info_index != outer_class_info_index,
2574 "Class is both outer and inner class in class file %s", CHECK_0);
2575 }
2576 // Access flags
2577 AccessFlags inner_access_flags;
2578 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2579 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2580 // Set abstract bit for old class files for backward compatibility
2581 flags |= JVM_ACC_ABSTRACT;
2582 }
2583 verify_legal_class_modifiers(flags, CHECK_0);
2584 inner_access_flags.set_flags(flags);
2585
2586 inner_classes->at_put(index++, inner_class_info_index);
2587 inner_classes->at_put(index++, outer_class_info_index);
2588 inner_classes->at_put(index++, inner_name_index);
2589 inner_classes->at_put(index++, inner_access_flags.as_short());
2590 }
2591
2592 // 4347400: make sure there's no duplicate entry in the classes array
2593 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2594 for(int i = 0; i < length * 4; i += 4) {
2595 for(int j = i + 4; j < length * 4; j += 4) {
2596 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2597 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2598 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2599 inner_classes->at(i+3) != inner_classes->at(j+3)),
2600 "Duplicate entry in InnerClasses in class file %s",
2601 CHECK_0);
2602 }
2603 }
2604 }
2605
2606 // Set EnclosingMethod class and method indexes.
2607 if (parsed_enclosingmethod_attribute) {
2608 inner_classes->at_put(index++, enclosing_method_class_index);
2609 inner_classes->at_put(index++, enclosing_method_method_index);
2610 }
2611 assert(index == size, "wrong size");
2612
2613 // Update InstanceKlass with inner class info.
2614 set_class_inner_classes(inner_classes);
2615
2616 // Restore buffer's current position.
2617 cfs->set_current(current_mark);
2618
2619 return length;
2620 }
2621
2622 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS) {
2623 set_class_synthetic_flag(true);
2624 }
2625
2626 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS) {
2627 ClassFileStream* cfs = stream();
2628 u2 signature_index = cfs->get_u2(CHECK);
2629 check_property(
2630 valid_cp_range(signature_index, cp->length()) &&
2631 cp->tag_at(signature_index).is_utf8(),
2632 "Invalid constant pool index %u in Signature attribute in class file %s",
2633 signature_index, CHECK);
2634 set_class_generic_signature(cp->symbol_at(signature_index));
2635 }
2636
2637 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(ClassLoaderData* loader_data,
2638 constantPoolHandle cp,
2639 u4 attribute_byte_length, TRAPS) {
2640 ClassFileStream* cfs = stream();
2641 u1* current_start = cfs->current();
2642
2643 cfs->guarantee_more(2, CHECK); // length
2644 int attribute_array_length = cfs->get_u2_fast();
2645
2646 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2647 "Short length on BootstrapMethods in class file %s",
2648 CHECK);
2649
2650 // The attribute contains a counted array of counted tuples of shorts,
2651 // represending bootstrap specifiers:
2652 // length*{bootstrap_method_index, argument_count*{argument_index}}
2653 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2654 // operand_count = number of shorts in attr, except for leading length
2655
2656 // The attribute is copied into a short[] array.
2657 // The array begins with a series of short[2] pairs, one for each tuple.
2658 int index_size = (attribute_array_length * 2);
2659
2660 Array<u2>* operands = MetadataFactory::new_array<u2>(loader_data, index_size + operand_count, CHECK);
2661
2662 int operand_fill_index = index_size;
2663 int cp_size = cp->length();
2664
2665 for (int n = 0; n < attribute_array_length; n++) {
2666 // Store a 32-bit offset into the header of the operand array.
2667 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2668
2669 // Read a bootstrap specifier.
2670 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2671 u2 bootstrap_method_index = cfs->get_u2_fast();
2672 u2 argument_count = cfs->get_u2_fast();
2673 check_property(
2674 valid_cp_range(bootstrap_method_index, cp_size) &&
2675 cp->tag_at(bootstrap_method_index).is_method_handle(),
2676 "bootstrap_method_index %u has bad constant type in class file %s",
2677 bootstrap_method_index,
2678 CHECK);
2679 operands->at_put(operand_fill_index++, bootstrap_method_index);
2680 operands->at_put(operand_fill_index++, argument_count);
2681
2682 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2683 for (int j = 0; j < argument_count; j++) {
2684 u2 argument_index = cfs->get_u2_fast();
2685 check_property(
2686 valid_cp_range(argument_index, cp_size) &&
2687 cp->tag_at(argument_index).is_loadable_constant(),
2688 "argument_index %u has bad constant type in class file %s",
2689 argument_index,
2690 CHECK);
2691 operands->at_put(operand_fill_index++, argument_index);
2692 }
2693 }
2694
2695 assert(operand_fill_index == operands->length(), "exact fill");
2696 assert(ConstantPool::operand_array_length(operands) == attribute_array_length, "correct decode");
2697
2698 u1* current_end = cfs->current();
2699 guarantee_property(current_end == current_start + attribute_byte_length,
2700 "Bad length on BootstrapMethods in class file %s",
2701 CHECK);
2702
2703 cp->set_operands(operands);
2704 }
2705
2706 void ClassFileParser::parse_classfile_attributes(ClassLoaderData* loader_data,
2707 constantPoolHandle cp,
2708 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2709 TRAPS) {
2710 ClassFileStream* cfs = stream();
2711 // Set inner classes attribute to default sentinel
2712 set_class_inner_classes(Universe::the_empty_short_array());
2713 cfs->guarantee_more(2, CHECK); // attributes_count
2714 u2 attributes_count = cfs->get_u2_fast();
2715 bool parsed_sourcefile_attribute = false;
2716 bool parsed_innerclasses_attribute = false;
2717 bool parsed_enclosingmethod_attribute = false;
2718 bool parsed_bootstrap_methods_attribute = false;
2719 u1* runtime_visible_annotations = NULL;
2720 int runtime_visible_annotations_length = 0;
2721 u1* runtime_invisible_annotations = NULL;
2722 int runtime_invisible_annotations_length = 0;
2723 u1* inner_classes_attribute_start = NULL;
2724 u4 inner_classes_attribute_length = 0;
2725 u2 enclosing_method_class_index = 0;
2726 u2 enclosing_method_method_index = 0;
2727 // Iterate over attributes
2728 while (attributes_count--) {
2729 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2730 u2 attribute_name_index = cfs->get_u2_fast();
2731 u4 attribute_length = cfs->get_u4_fast();
2732 check_property(
2733 valid_cp_range(attribute_name_index, cp->length()) &&
2734 cp->tag_at(attribute_name_index).is_utf8(),
2735 "Attribute name has bad constant pool index %u in class file %s",
2736 attribute_name_index, CHECK);
2737 Symbol* tag = cp->symbol_at(attribute_name_index);
2738 if (tag == vmSymbols::tag_source_file()) {
2739 // Check for SourceFile tag
2740 if (_need_verify) {
2741 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2742 }
2743 if (parsed_sourcefile_attribute) {
2744 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2745 } else {
2746 parsed_sourcefile_attribute = true;
2747 }
2748 parse_classfile_sourcefile_attribute(cp, CHECK);
2749 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2750 // Check for SourceDebugExtension tag
2751 parse_classfile_source_debug_extension_attribute(cp, (int)attribute_length, CHECK);
2752 } else if (tag == vmSymbols::tag_inner_classes()) {
2753 // Check for InnerClasses tag
2754 if (parsed_innerclasses_attribute) {
2755 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2756 } else {
2757 parsed_innerclasses_attribute = true;
2758 }
2759 inner_classes_attribute_start = cfs->get_u1_buffer();
2760 inner_classes_attribute_length = attribute_length;
2761 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2762 } else if (tag == vmSymbols::tag_synthetic()) {
2763 // Check for Synthetic tag
2764 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2765 if (attribute_length != 0) {
2766 classfile_parse_error(
2767 "Invalid Synthetic classfile attribute length %u in class file %s",
2768 attribute_length, CHECK);
2769 }
2770 parse_classfile_synthetic_attribute(cp, CHECK);
2771 } else if (tag == vmSymbols::tag_deprecated()) {
2772 // Check for Deprecatd tag - 4276120
2773 if (attribute_length != 0) {
2774 classfile_parse_error(
2775 "Invalid Deprecated classfile attribute length %u in class file %s",
2776 attribute_length, CHECK);
2777 }
2778 } else if (_major_version >= JAVA_1_5_VERSION) {
2779 if (tag == vmSymbols::tag_signature()) {
2780 if (attribute_length != 2) {
2781 classfile_parse_error(
2782 "Wrong Signature attribute length %u in class file %s",
2783 attribute_length, CHECK);
2784 }
2785 parse_classfile_signature_attribute(cp, CHECK);
2786 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2787 runtime_visible_annotations_length = attribute_length;
2788 runtime_visible_annotations = cfs->get_u1_buffer();
2789 assert(runtime_visible_annotations != NULL, "null visible annotations");
2790 parse_annotations(runtime_visible_annotations,
2791 runtime_visible_annotations_length,
2792 cp,
2793 parsed_annotations,
2794 CHECK);
2795 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2796 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2797 runtime_invisible_annotations_length = attribute_length;
2798 runtime_invisible_annotations = cfs->get_u1_buffer();
2799 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2800 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2801 } else if (tag == vmSymbols::tag_enclosing_method()) {
2802 if (parsed_enclosingmethod_attribute) {
2803 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2804 } else {
2805 parsed_enclosingmethod_attribute = true;
2806 }
2807 cfs->guarantee_more(4, CHECK); // class_index, method_index
2808 enclosing_method_class_index = cfs->get_u2_fast();
2809 enclosing_method_method_index = cfs->get_u2_fast();
2810 if (enclosing_method_class_index == 0) {
2811 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2812 }
2813 // Validate the constant pool indices and types
2814 if (!cp->is_within_bounds(enclosing_method_class_index) ||
2815 !is_klass_reference(cp, enclosing_method_class_index)) {
2816 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2817 }
2818 if (enclosing_method_method_index != 0 &&
2819 (!cp->is_within_bounds(enclosing_method_method_index) ||
2820 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2821 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2822 }
2823 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2824 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2825 if (parsed_bootstrap_methods_attribute)
2826 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2827 parsed_bootstrap_methods_attribute = true;
2828 parse_classfile_bootstrap_methods_attribute(loader_data, cp, attribute_length, CHECK);
2829 } else {
2830 // Unknown attribute
2831 cfs->skip_u1(attribute_length, CHECK);
2832 }
2833 } else {
2834 // Unknown attribute
2835 cfs->skip_u1(attribute_length, CHECK);
2836 }
2837 }
2838 AnnotationArray* annotations = assemble_annotations(loader_data,
2839 runtime_visible_annotations,
2840 runtime_visible_annotations_length,
2841 runtime_invisible_annotations,
2842 runtime_invisible_annotations_length,
2843 CHECK);
2844 set_class_annotations(annotations);
2845
2846 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
2847 u2 num_of_classes = parse_classfile_inner_classes_attribute(
2848 loader_data,
2849 inner_classes_attribute_start,
2850 parsed_innerclasses_attribute,
2851 enclosing_method_class_index,
2852 enclosing_method_method_index,
2853 cp, CHECK);
2854 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
2855 guarantee_property(
2856 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2857 "Wrong InnerClasses attribute length in class file %s", CHECK);
2858 }
2859 }
2860
2861 if (_max_bootstrap_specifier_index >= 0) {
2862 guarantee_property(parsed_bootstrap_methods_attribute,
2863 "Missing BootstrapMethods attribute in class file %s", CHECK);
2864 }
2865 }
2866
2867 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
2868 if (_synthetic_flag)
2869 k->set_is_synthetic();
2870 if (_sourcefile != NULL) {
2871 _sourcefile->increment_refcount();
2872 k->set_source_file_name(_sourcefile);
2873 }
2874 if (_generic_signature != NULL) {
2875 _generic_signature->increment_refcount();
2876 k->set_generic_signature(_generic_signature);
2877 }
2878 if (_sde_buffer != NULL) {
2879 k->set_source_debug_extension(_sde_buffer, _sde_length);
2880 }
2881 k->set_inner_classes(_inner_classes);
2882 if (_annotations != NULL) {
2883 k->annotations()->set_class_annotations(_annotations);
2884 }
2885 }
2886
2887 AnnotationArray* ClassFileParser::assemble_annotations(ClassLoaderData* loader_data,
2888 u1* runtime_visible_annotations,
2889 int runtime_visible_annotations_length,
2890 u1* runtime_invisible_annotations,
2891 int runtime_invisible_annotations_length, TRAPS) {
2892 AnnotationArray* annotations = NULL;
2893 if (runtime_visible_annotations != NULL ||
2894 runtime_invisible_annotations != NULL) {
2895 annotations = MetadataFactory::new_array<u1>(loader_data,
2896 runtime_visible_annotations_length +
2897 runtime_invisible_annotations_length,
2898 CHECK_(annotations));
2899 if (runtime_visible_annotations != NULL) {
2900 for (int i = 0; i < runtime_visible_annotations_length; i++) {
2901 annotations->at_put(i, runtime_visible_annotations[i]);
2902 }
2903 }
2904 if (runtime_invisible_annotations != NULL) {
2905 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
2906 int append = runtime_visible_annotations_length+i;
2907 annotations->at_put(append, runtime_invisible_annotations[i]);
2908 }
2909 }
2910 }
2911 return annotations;
2912 }
2913
2914
2915 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2916 Handle class_loader,
2917 Handle protection_domain,
2918 KlassHandle host_klass,
2919 GrowableArray<Handle>* cp_patches,
2920 TempNewSymbol& parsed_name,
2921 bool verify,
2922 TRAPS) {
2923 // When a retransformable agent is attached, JVMTI caches the
2924 // class bytes that existed before the first retransformation.
2925 // If RedefineClasses() was used before the retransformable
2926 // agent attached, then the cached class bytes may not be the
2927 // original class bytes.
2928 unsigned char *cached_class_file_bytes = NULL;
2929 jint cached_class_file_length;
2930 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
2931
2932 ClassFileStream* cfs = stream();
2933 // Timing
2934 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2935 JavaThread* jt = (JavaThread*) THREAD;
2936
2937 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2938 ClassLoader::perf_class_parse_selftime(),
2939 NULL,
2940 jt->get_thread_stat()->perf_recursion_counts_addr(),
2941 jt->get_thread_stat()->perf_timers_addr(),
2942 PerfClassTraceTime::PARSE_CLASS);
2943
2944 init_parsed_class_attributes();
2945
2946 if (JvmtiExport::should_post_class_file_load_hook()) {
2947 // Get the cached class file bytes (if any) from the class that
2948 // is being redefined or retransformed. We use jvmti_thread_state()
2949 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
2950 // a JvmtiThreadState any earlier than necessary. This will help
2951 // avoid the bug described by 7126851.
2952 JvmtiThreadState *state = jt->jvmti_thread_state();
2953 if (state != NULL) {
2954 KlassHandle *h_class_being_redefined =
2955 state->get_class_being_redefined();
2956 if (h_class_being_redefined != NULL) {
2957 instanceKlassHandle ikh_class_being_redefined =
2958 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
2959 cached_class_file_bytes =
2960 ikh_class_being_redefined->get_cached_class_file_bytes();
2961 cached_class_file_length =
2962 ikh_class_being_redefined->get_cached_class_file_len();
2963 }
2964 }
2965
2966 unsigned char* ptr = cfs->buffer();
2967 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2968
2969 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2970 &ptr, &end_ptr,
2971 &cached_class_file_bytes,
2972 &cached_class_file_length);
2973
2974 if (ptr != cfs->buffer()) {
2975 // JVMTI agent has modified class file data.
2976 // Set new class file stream using JVMTI agent modified
2977 // class file data.
2978 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2979 set_stream(cfs);
2980 }
2981 }
2982
2983 _host_klass = host_klass;
2984 _cp_patches = cp_patches;
2985
2986 instanceKlassHandle nullHandle;
2987
2988 // Figure out whether we can skip format checking (matching classic VM behavior)
2989 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2990
2991 // Set the verify flag in stream
2992 cfs->set_verify(_need_verify);
2993
2994 // Save the class file name for easier error message printing.
2995 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2996
2997 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2998 // Magic value
2999 u4 magic = cfs->get_u4_fast();
3000 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3001 "Incompatible magic value %u in class file %s",
3002 magic, CHECK_(nullHandle));
3003
3004 // Version numbers
3005 u2 minor_version = cfs->get_u2_fast();
3006 u2 major_version = cfs->get_u2_fast();
3007
3008 // Check version numbers - we check this even with verifier off
3009 if (!is_supported_version(major_version, minor_version)) {
3010 if (name == NULL) {
3011 Exceptions::fthrow(
3012 THREAD_AND_LOCATION,
3013 vmSymbols::java_lang_UnsupportedClassVersionError(),
3014 "Unsupported major.minor version %u.%u",
3015 major_version,
3016 minor_version);
3017 } else {
3018 ResourceMark rm(THREAD);
3019 Exceptions::fthrow(
3020 THREAD_AND_LOCATION,
3021 vmSymbols::java_lang_UnsupportedClassVersionError(),
3022 "%s : Unsupported major.minor version %u.%u",
3023 name->as_C_string(),
3024 major_version,
3025 minor_version);
3026 }
3027 return nullHandle;
3028 }
3029
3030 _major_version = major_version;
3031 _minor_version = minor_version;
3032
3033
3034 // Check if verification needs to be relaxed for this class file
3035 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3036 _relax_verify = Verifier::relax_verify_for(class_loader());
3037
3038 // Constant pool
3039 constantPoolHandle cp = parse_constant_pool(loader_data, CHECK_(nullHandle));
3040 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
3041
3042 int cp_size = cp->length();
3043
3044 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3045
3046 // Access flags
3047 AccessFlags access_flags;
3048 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3049
3050 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3051 // Set abstract bit for old class files for backward compatibility
3052 flags |= JVM_ACC_ABSTRACT;
3053 }
3054 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3055 access_flags.set_flags(flags);
3056
3057 // This class and superclass
3058 instanceKlassHandle super_klass;
3059 u2 this_class_index = cfs->get_u2_fast();
3060 check_property(
3061 valid_cp_range(this_class_index, cp_size) &&
3062 cp->tag_at(this_class_index).is_unresolved_klass(),
3063 "Invalid this class index %u in constant pool in class file %s",
3064 this_class_index, CHECK_(nullHandle));
3065
3066 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
3067 assert(class_name != NULL, "class_name can't be null");
3068
3069 // It's important to set parsed_name *before* resolving the super class.
3070 // (it's used for cleanup by the caller if parsing fails)
3071 parsed_name = class_name;
3072 // parsed_name is returned and can be used if there's an error, so add to
3073 // its reference count. Caller will decrement the refcount.
3074 parsed_name->increment_refcount();
3075
3076 // Update _class_name which could be null previously to be class_name
3077 _class_name = class_name;
3078
3079 // Don't need to check whether this class name is legal or not.
3080 // It has been checked when constant pool is parsed.
3081 // However, make sure it is not an array type.
3082 if (_need_verify) {
3083 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3084 "Bad class name in class file %s",
3085 CHECK_(nullHandle));
3086 }
3087
3088 Klass* preserve_this_klass; // for storing result across HandleMark
3089
3090 // release all handles when parsing is done
3091 { HandleMark hm(THREAD);
3092
3093 // Checks if name in class file matches requested name
3094 if (name != NULL && class_name != name) {
3095 ResourceMark rm(THREAD);
3096 Exceptions::fthrow(
3097 THREAD_AND_LOCATION,
3098 vmSymbols::java_lang_NoClassDefFoundError(),
3099 "%s (wrong name: %s)",
3100 name->as_C_string(),
3101 class_name->as_C_string()
3102 );
3103 return nullHandle;
3104 }
3105
3106 if (TraceClassLoadingPreorder) {
3107 tty->print("[Loading %s", name->as_klass_external_name());
3108 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3109 tty->print_cr("]");
3110 }
3111
3112 u2 super_class_index = cfs->get_u2_fast();
3113 if (super_class_index == 0) {
3114 check_property(class_name == vmSymbols::java_lang_Object(),
3115 "Invalid superclass index %u in class file %s",
3116 super_class_index,
3117 CHECK_(nullHandle));
3118 } else {
3119 check_property(valid_cp_range(super_class_index, cp_size) &&
3120 is_klass_reference(cp, super_class_index),
3121 "Invalid superclass index %u in class file %s",
3122 super_class_index,
3123 CHECK_(nullHandle));
3124 // The class name should be legal because it is checked when parsing constant pool.
3125 // However, make sure it is not an array type.
3126 bool is_array = false;
3127 if (cp->tag_at(super_class_index).is_klass()) {
3128 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3129 if (_need_verify)
3130 is_array = super_klass->oop_is_array();
3131 } else if (_need_verify) {
3132 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3133 }
3134 if (_need_verify) {
3135 guarantee_property(!is_array,
3136 "Bad superclass name in class file %s", CHECK_(nullHandle));
3137 }
3138 }
3139
3140 // Interfaces
3141 u2 itfs_len = cfs->get_u2_fast();
3142 Array<Klass*>* local_interfaces;
3143 if (itfs_len == 0) {
3144 local_interfaces = Universe::the_empty_klass_array();
3145 } else {
3146 local_interfaces = parse_interfaces(cp, itfs_len, loader_data, protection_domain, _class_name, CHECK_(nullHandle));
3147 }
3148
3149 u2 java_fields_count = 0;
3150 // Fields (offsets are filled in later)
3151 FieldAllocationCount fac;
3152 Array<AnnotationArray*>* fields_annotations = NULL;
3153 Array<u2>* fields = parse_fields(loader_data, class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
3154 &java_fields_count,
3155 CHECK_(nullHandle));
3156 // Methods
3157 bool has_final_method = false;
3158 AccessFlags promoted_flags;
3159 promoted_flags.set_flags(0);
3160 // These need to be oop pointers because they are allocated lazily
3161 // inside parse_methods inside a nested HandleMark
3162 Array<AnnotationArray*>* methods_annotations = NULL;
3163 Array<AnnotationArray*>* methods_parameter_annotations = NULL;
3164 Array<AnnotationArray*>* methods_default_annotations = NULL;
3165 Array<Method*>* methods = parse_methods(loader_data,
3166 cp, access_flags.is_interface(),
3167 &promoted_flags,
3168 &has_final_method,
3169 &methods_annotations,
3170 &methods_parameter_annotations,
3171 &methods_default_annotations,
3172 CHECK_(nullHandle));
3173
3174 // Additional attributes
3175 ClassAnnotationCollector parsed_annotations;
3176 parse_classfile_attributes(loader_data, cp, &parsed_annotations, CHECK_(nullHandle));
3177
3178 // Make sure this is the end of class file stream
3179 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3180
3181 // We check super class after class file is parsed and format is checked
3182 if (super_class_index > 0 && super_klass.is_null()) {
3183 Symbol* sk = cp->klass_name_at(super_class_index);
3184 if (access_flags.is_interface()) {
3185 // Before attempting to resolve the superclass, check for class format
3186 // errors not checked yet.
3187 guarantee_property(sk == vmSymbols::java_lang_Object(),
3188 "Interfaces must have java.lang.Object as superclass in class file %s",
3189 CHECK_(nullHandle));
3190 }
3191 Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
3192 sk,
3193 class_loader,
3194 protection_domain,
3195 true,
3196 CHECK_(nullHandle));
3197
3198 KlassHandle kh (THREAD, k);
3199 super_klass = instanceKlassHandle(THREAD, kh());
3200 if (LinkWellKnownClasses) // my super class is well known to me
3201 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
3202 }
3203 if (super_klass.not_null()) {
3204 if (super_klass->is_interface()) {
3205 ResourceMark rm(THREAD);
3206 Exceptions::fthrow(
3207 THREAD_AND_LOCATION,
3208 vmSymbols::java_lang_IncompatibleClassChangeError(),
3209 "class %s has interface %s as super class",
3210 class_name->as_klass_external_name(),
3211 super_klass->external_name()
3212 );
3213 return nullHandle;
3214 }
3215 // Make sure super class is not final
3216 if (super_klass->is_final()) {
3217 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3218 }
3219 }
3220
3221 // Compute the transitive list of all unique interfaces implemented by this class
3222 Array<Klass*>* transitive_interfaces = compute_transitive_interfaces(loader_data, super_klass, local_interfaces, CHECK_(nullHandle));
3223
3224 // sort methods
3225 Array<int>* method_ordering = sort_methods(loader_data,
3226 methods,
3227 methods_annotations,
3228 methods_parameter_annotations,
3229 methods_default_annotations,
3230 CHECK_(nullHandle));
3231
3232 // promote flags from parse_methods() to the klass' flags
3233 access_flags.add_promoted_flags(promoted_flags.as_int());
3234
3235 // Size of Java vtable (in words)
3236 int vtable_size = 0;
3237 int itable_size = 0;
3238 int num_miranda_methods = 0;
3239
3240 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3241 num_miranda_methods,
3242 super_klass(),
3243 methods,
3244 access_flags,
3245 class_loader,
3246 class_name,
3247 local_interfaces,
3248 CHECK_(nullHandle));
3249
3250 // Size of Java itable (in words)
3251 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3252
3253 // Field size and offset computation
3254 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3255 #ifndef PRODUCT
3256 int orig_nonstatic_field_size = 0;
3257 #endif
3258 int static_field_size = 0;
3259 int next_static_oop_offset;
3260 int next_static_double_offset;
3261 int next_static_word_offset;
3262 int next_static_short_offset;
3263 int next_static_byte_offset;
3264 int next_static_type_offset;
3265 int next_nonstatic_oop_offset;
3266 int next_nonstatic_double_offset;
3267 int next_nonstatic_word_offset;
3268 int next_nonstatic_short_offset;
3269 int next_nonstatic_byte_offset;
3270 int next_nonstatic_type_offset;
3271 int first_nonstatic_oop_offset;
3272 int first_nonstatic_field_offset;
3273 int next_nonstatic_field_offset;
3274
3275 // Calculate the starting byte offsets
3276 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3277 next_static_double_offset = next_static_oop_offset +
3278 (fac.count[STATIC_OOP] * heapOopSize);
3279 if ( fac.count[STATIC_DOUBLE] &&
3280 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3281 Universe::field_type_should_be_aligned(T_LONG)) ) {
3282 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3283 }
3284
3285 next_static_word_offset = next_static_double_offset +
3286 (fac.count[STATIC_DOUBLE] * BytesPerLong);
3287 next_static_short_offset = next_static_word_offset +
3288 (fac.count[STATIC_WORD] * BytesPerInt);
3289 next_static_byte_offset = next_static_short_offset +
3290 (fac.count[STATIC_SHORT] * BytesPerShort);
3291 next_static_type_offset = align_size_up((next_static_byte_offset +
3292 fac.count[STATIC_BYTE] ), wordSize );
3293 static_field_size = (next_static_type_offset -
3294 next_static_oop_offset) / wordSize;
3295
3296 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3297 nonstatic_field_size * heapOopSize;
3298 next_nonstatic_field_offset = first_nonstatic_field_offset;
3299
3300 unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3301 unsigned int nonstatic_word_count = fac.count[NONSTATIC_WORD];
3302 unsigned int nonstatic_short_count = fac.count[NONSTATIC_SHORT];
3303 unsigned int nonstatic_byte_count = fac.count[NONSTATIC_BYTE];
3304 unsigned int nonstatic_oop_count = fac.count[NONSTATIC_OOP];
3305
3306 bool super_has_nonstatic_fields =
3307 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3308 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3309 ((nonstatic_double_count + nonstatic_word_count +
3310 nonstatic_short_count + nonstatic_byte_count +
3311 nonstatic_oop_count) != 0);
3312
3313
3314 // Prepare list of oops for oop map generation.
3315 int* nonstatic_oop_offsets;
3316 unsigned int* nonstatic_oop_counts;
3317 unsigned int nonstatic_oop_map_count = 0;
3318
3319 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3320 THREAD, int, nonstatic_oop_count + 1);
3321 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3322 THREAD, unsigned int, nonstatic_oop_count + 1);
3323
3324 first_nonstatic_oop_offset = 0; // will be set for first oop field
3325
3326 #ifndef PRODUCT
3327 if( PrintCompactFieldsSavings ) {
3328 next_nonstatic_double_offset = next_nonstatic_field_offset +
3329 (nonstatic_oop_count * heapOopSize);
3330 if ( nonstatic_double_count > 0 ) {
3331 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3332 }
3333 next_nonstatic_word_offset = next_nonstatic_double_offset +
3334 (nonstatic_double_count * BytesPerLong);
3335 next_nonstatic_short_offset = next_nonstatic_word_offset +
3336 (nonstatic_word_count * BytesPerInt);
3337 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3338 (nonstatic_short_count * BytesPerShort);
3339 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3340 nonstatic_byte_count ), heapOopSize );
3341 orig_nonstatic_field_size = nonstatic_field_size +
3342 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3343 }
3344 #endif
3345 bool compact_fields = CompactFields;
3346 int allocation_style = FieldsAllocationStyle;
3347 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3348 assert(false, "0 <= FieldsAllocationStyle <= 2");
3349 allocation_style = 1; // Optimistic
3350 }
3351
3352 // The next classes have predefined hard-coded fields offsets
3353 // (see in JavaClasses::compute_hard_coded_offsets()).
3354 // Use default fields allocation order for them.
3355 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3356 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3357 class_name == vmSymbols::java_lang_Class() ||
3358 class_name == vmSymbols::java_lang_ClassLoader() ||
3359 class_name == vmSymbols::java_lang_ref_Reference() ||
3360 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3361 class_name == vmSymbols::java_lang_StackTraceElement() ||
3362 class_name == vmSymbols::java_lang_String() ||
3363 class_name == vmSymbols::java_lang_Throwable() ||
3364 class_name == vmSymbols::java_lang_Boolean() ||
3365 class_name == vmSymbols::java_lang_Character() ||
3366 class_name == vmSymbols::java_lang_Float() ||
3367 class_name == vmSymbols::java_lang_Double() ||
3368 class_name == vmSymbols::java_lang_Byte() ||
3369 class_name == vmSymbols::java_lang_Short() ||
3370 class_name == vmSymbols::java_lang_Integer() ||
3371 class_name == vmSymbols::java_lang_Long())) {
3372 allocation_style = 0; // Allocate oops first
3373 compact_fields = false; // Don't compact fields
3374 }
3375
3376 if( allocation_style == 0 ) {
3377 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3378 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3379 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3380 (nonstatic_oop_count * heapOopSize);
3381 } else if( allocation_style == 1 ) {
3382 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3383 next_nonstatic_double_offset = next_nonstatic_field_offset;
3384 } else if( allocation_style == 2 ) {
3385 // Fields allocation: oops fields in super and sub classes are together.
3386 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3387 super_klass->nonstatic_oop_map_size() > 0 ) {
3388 int map_count = super_klass->nonstatic_oop_map_count();
3389 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3390 OopMapBlock* last_map = first_map + map_count - 1;
3391 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3392 if (next_offset == next_nonstatic_field_offset) {
3393 allocation_style = 0; // allocate oops first
3394 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3395 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3396 (nonstatic_oop_count * heapOopSize);
3397 }
3398 }
3399 if( allocation_style == 2 ) {
3400 allocation_style = 1; // allocate oops last
3401 next_nonstatic_double_offset = next_nonstatic_field_offset;
3402 }
3403 } else {
3404 ShouldNotReachHere();
3405 }
3406
3407 int nonstatic_oop_space_count = 0;
3408 int nonstatic_word_space_count = 0;
3409 int nonstatic_short_space_count = 0;
3410 int nonstatic_byte_space_count = 0;
3411 int nonstatic_oop_space_offset;
3412 int nonstatic_word_space_offset;
3413 int nonstatic_short_space_offset;
3414 int nonstatic_byte_space_offset;
3415
3416 if( nonstatic_double_count > 0 ) {
3417 int offset = next_nonstatic_double_offset;
3418 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3419 if( compact_fields && offset != next_nonstatic_double_offset ) {
3420 // Allocate available fields into the gap before double field.
3421 int length = next_nonstatic_double_offset - offset;
3422 assert(length == BytesPerInt, "");
3423 nonstatic_word_space_offset = offset;
3424 if( nonstatic_word_count > 0 ) {
3425 nonstatic_word_count -= 1;
3426 nonstatic_word_space_count = 1; // Only one will fit
3427 length -= BytesPerInt;
3428 offset += BytesPerInt;
3429 }
3430 nonstatic_short_space_offset = offset;
3431 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3432 nonstatic_short_count -= 1;
3433 nonstatic_short_space_count += 1;
3434 length -= BytesPerShort;
3435 offset += BytesPerShort;
3436 }
3437 nonstatic_byte_space_offset = offset;
3438 while( length > 0 && nonstatic_byte_count > 0 ) {
3439 nonstatic_byte_count -= 1;
3440 nonstatic_byte_space_count += 1;
3441 length -= 1;
3442 }
3443 // Allocate oop field in the gap if there are no other fields for that.
3444 nonstatic_oop_space_offset = offset;
3445 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3446 allocation_style != 0 ) { // when oop fields not first
3447 nonstatic_oop_count -= 1;
3448 nonstatic_oop_space_count = 1; // Only one will fit
3449 length -= heapOopSize;
3450 offset += heapOopSize;
3451 }
3452 }
3453 }
3454
3455 next_nonstatic_word_offset = next_nonstatic_double_offset +
3456 (nonstatic_double_count * BytesPerLong);
3457 next_nonstatic_short_offset = next_nonstatic_word_offset +
3458 (nonstatic_word_count * BytesPerInt);
3459 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3460 (nonstatic_short_count * BytesPerShort);
3461
3462 int notaligned_offset;
3463 if( allocation_style == 0 ) {
3464 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3465 } else { // allocation_style == 1
3466 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3467 if( nonstatic_oop_count > 0 ) {
3468 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3469 }
3470 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3471 }
3472 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3473 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3474 - first_nonstatic_field_offset)/heapOopSize);
3475
3476 // Iterate over fields again and compute correct offsets.
3477 // The field allocation type was temporarily stored in the offset slot.
3478 // oop fields are located before non-oop fields (static and non-static).
3479 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3480 int real_offset;
3481 FieldAllocationType atype = (FieldAllocationType) fs.offset();
3482 switch (atype) {
3483 case STATIC_OOP:
3484 real_offset = next_static_oop_offset;
3485 next_static_oop_offset += heapOopSize;
3486 break;
3487 case STATIC_BYTE:
3488 real_offset = next_static_byte_offset;
3489 next_static_byte_offset += 1;
3490 break;
3491 case STATIC_SHORT:
3492 real_offset = next_static_short_offset;
3493 next_static_short_offset += BytesPerShort;
3494 break;
3495 case STATIC_WORD:
3496 real_offset = next_static_word_offset;
3497 next_static_word_offset += BytesPerInt;
3498 break;
3499 case STATIC_DOUBLE:
3500 real_offset = next_static_double_offset;
3501 next_static_double_offset += BytesPerLong;
3502 break;
3503 case NONSTATIC_OOP:
3504 if( nonstatic_oop_space_count > 0 ) {
3505 real_offset = nonstatic_oop_space_offset;
3506 nonstatic_oop_space_offset += heapOopSize;
3507 nonstatic_oop_space_count -= 1;
3508 } else {
3509 real_offset = next_nonstatic_oop_offset;
3510 next_nonstatic_oop_offset += heapOopSize;
3511 }
3512 // Update oop maps
3513 if( nonstatic_oop_map_count > 0 &&
3514 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3515 real_offset -
3516 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3517 heapOopSize ) {
3518 // Extend current oop map
3519 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3520 } else {
3521 // Create new oop map
3522 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3523 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3524 nonstatic_oop_map_count += 1;
3525 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3526 first_nonstatic_oop_offset = real_offset;
3527 }
3528 }
3529 break;
3530 case NONSTATIC_BYTE:
3531 if( nonstatic_byte_space_count > 0 ) {
3532 real_offset = nonstatic_byte_space_offset;
3533 nonstatic_byte_space_offset += 1;
3534 nonstatic_byte_space_count -= 1;
3535 } else {
3536 real_offset = next_nonstatic_byte_offset;
3537 next_nonstatic_byte_offset += 1;
3538 }
3539 break;
3540 case NONSTATIC_SHORT:
3541 if( nonstatic_short_space_count > 0 ) {
3542 real_offset = nonstatic_short_space_offset;
3543 nonstatic_short_space_offset += BytesPerShort;
3544 nonstatic_short_space_count -= 1;
3545 } else {
3546 real_offset = next_nonstatic_short_offset;
3547 next_nonstatic_short_offset += BytesPerShort;
3548 }
3549 break;
3550 case NONSTATIC_WORD:
3551 if( nonstatic_word_space_count > 0 ) {
3552 real_offset = nonstatic_word_space_offset;
3553 nonstatic_word_space_offset += BytesPerInt;
3554 nonstatic_word_space_count -= 1;
3555 } else {
3556 real_offset = next_nonstatic_word_offset;
3557 next_nonstatic_word_offset += BytesPerInt;
3558 }
3559 break;
3560 case NONSTATIC_DOUBLE:
3561 real_offset = next_nonstatic_double_offset;
3562 next_nonstatic_double_offset += BytesPerLong;
3563 break;
3564 default:
3565 ShouldNotReachHere();
3566 }
3567 fs.set_offset(real_offset);
3568 }
3569
3570 // Size of instances
3571 int instance_size;
3572
3573 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3574 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3575
3576 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3577
3578 // Number of non-static oop map blocks allocated at end of klass.
3579 const unsigned int total_oop_map_count =
3580 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3581 first_nonstatic_oop_offset);
3582
3583 // Compute reference type
3584 ReferenceType rt;
3585 if (super_klass() == NULL) {
3586 rt = REF_NONE;
3587 } else {
3588 rt = super_klass->reference_type();
3589 }
3590
3591 // We can now create the basic Klass* for this klass
3592 int total_oop_map_size2 =
3593 InstanceKlass::nonstatic_oop_map_size(total_oop_map_count);
3594
3595 Klass* ik = InstanceKlass::allocate_instance_klass(loader_data,
3596 vtable_size,
3597 itable_size,
3598 static_field_size,
3599 total_oop_map_size2,
3600 rt,
3601 access_flags,
3602 name,
3603 super_klass(),
3604 host_klass,
3605 CHECK_(nullHandle));
3606
3607 // Add all classes to our internal class loader list here,
3608 // including classes in the bootstrap (NULL) class loader.
3609 loader_data->add_class(ik);
3610
3611 instanceKlassHandle this_klass (THREAD, ik);
3612
3613 assert(this_klass->static_field_size() == static_field_size, "sanity");
3614 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3615 "sanity");
3616
3617 // Fill in information already parsed
3618 this_klass->set_should_verify_class(verify);
3619 jint lh = Klass::instance_layout_helper(instance_size, false);
3620 this_klass->set_layout_helper(lh);
3621 assert(this_klass->oop_is_instance(), "layout is correct");
3622 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3623 // Not yet: supers are done below to support the new subtype-checking fields
3624 //this_klass->set_super(super_klass());
3625 this_klass->set_class_loader_data(loader_data);
3626 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3627 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3628 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3629 cp->set_pool_holder(this_klass());
3630 error_handler.set_in_error(false); // turn off error handler for cp
3631 this_klass->set_constants(cp());
3632 this_klass->set_local_interfaces(local_interfaces);
3633 this_klass->set_fields(fields, java_fields_count);
3634 this_klass->set_methods(methods);
3635 if (has_final_method) {
3636 this_klass->set_has_final_method();
3637 }
3638 this_klass->set_method_ordering(method_ordering);
3639 // The InstanceKlass::_methods_jmethod_ids cache and the
3640 // InstanceKlass::_methods_cached_itable_indices cache are
3641 // both managed on the assumption that the initial cache
3642 // size is equal to the number of methods in the class. If
3643 // that changes, then InstanceKlass::idnum_can_increment()
3644 // has to be changed accordingly.
3645 this_klass->set_initial_method_idnum(methods->length());
3646 this_klass->set_name(cp->klass_name_at(this_class_index));
3647 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself
3648 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3649
3650 if (fields_annotations != NULL ||
3651 methods_annotations != NULL ||
3652 methods_parameter_annotations != NULL ||
3653 methods_default_annotations != NULL) {
3654 // Allocate an annotation type if needed.
3655 Annotations* anno = Annotations::allocate(loader_data,
3656 fields_annotations, methods_annotations,
3657 methods_parameter_annotations,
3658 methods_default_annotations, CHECK_(nullHandle));
3659 this_klass->set_annotations(anno);
3660 } else {
3661 this_klass->set_annotations(NULL);
3662 }
3663
3664
3665 this_klass->set_minor_version(minor_version);
3666 this_klass->set_major_version(major_version);
3667
3668 // Set up Method*::intrinsic_id as soon as we know the names of methods.
3669 // (We used to do this lazily, but now we query it in Rewriter,
3670 // which is eagerly done for every method, so we might as well do it now,
3671 // when everything is fresh in memory.)
3672 if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
3673 for (int j = 0; j < methods->length(); j++) {
3674 methods->at(j)->init_intrinsic_id();
3675 }
3676 }
3677
3678 if (cached_class_file_bytes != NULL) {
3679 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
3680 this_klass->set_cached_class_file(cached_class_file_bytes,
3681 cached_class_file_length);
3682 }
3683
3684 // Miranda methods
3685 if ((num_miranda_methods > 0) ||
3686 // if this class introduced new miranda methods or
3687 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3688 // super class exists and this class inherited miranda methods
3689 ) {
3690 this_klass->set_has_miranda_methods(); // then set a flag
3691 }
3692
3693 // Fill in field values obtained by parse_classfile_attributes
3694 if (parsed_annotations.has_any_annotations()) {
3695 parsed_annotations.apply_to(this_klass);
3696 }
3697 // Create annotations
3698 if (_annotations != NULL && this_klass->annotations() == NULL) {
3699 Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
3700 this_klass->set_annotations(anno);
3701 }
3702 apply_parsed_class_attributes(this_klass);
3703
3704 // Compute transitive closure of interfaces this class implements
3705 this_klass->set_transitive_interfaces(transitive_interfaces);
3706
3707 // Fill in information needed to compute superclasses.
3708 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3709
3710 // Initialize itable offset tables
3711 klassItable::setup_itable_offset_table(this_klass);
3712
3713 // Do final class setup
3714 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3715
3716 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
3717 set_precomputed_flags(this_klass);
3718
3719 // reinitialize modifiers, using the InnerClasses attribute
3720 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3721 this_klass->set_modifier_flags(computed_modifiers);
3722
3723 // check if this class can access its super class
3724 check_super_class_access(this_klass, CHECK_(nullHandle));
3725
3726 // check if this class can access its superinterfaces
3727 check_super_interface_access(this_klass, CHECK_(nullHandle));
3728
3729 // check if this class overrides any final method
3730 check_final_method_override(this_klass, CHECK_(nullHandle));
3731
3732 // check that if this class is an interface then it doesn't have static methods
3733 if (this_klass->is_interface()) {
3734 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3735 }
3736
3737 // Allocate mirror and initialize static fields
3738 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3739
3740 // Allocate a simple java object for locking during class initialization.
3741 // This needs to be a java object because it can be held across a java call.
3742 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL);
3743 this_klass->set_init_lock(r);
3744
3745 // TODO: Move these oops to the mirror
3746 this_klass->set_protection_domain(protection_domain());
3747
3748 // Update the loader_data graph.
3749 record_defined_class_dependencies(this_klass, CHECK_NULL);
3750
3751 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
3752 false /* not shared class */);
3753
3754 if (TraceClassLoading) {
3755 // print in a single call to reduce interleaving of output
3756 if (cfs->source() != NULL) {
3757 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3758 cfs->source());
3759 } else if (class_loader.is_null()) {
3760 if (THREAD->is_Java_thread()) {
3761 Klass* caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3762 tty->print("[Loaded %s by instance of %s]\n",
3763 this_klass->external_name(),
3764 InstanceKlass::cast(caller)->external_name());
3765 } else {
3766 tty->print("[Loaded %s]\n", this_klass->external_name());
3767 }
3768 } else {
3769 ResourceMark rm;
3770 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3771 InstanceKlass::cast(class_loader->klass())->external_name());
3772 }
3773 }
3774
3775 if (TraceClassResolution) {
3776 // print out the superclass.
3777 const char * from = Klass::cast(this_klass())->external_name();
3778 if (this_klass->java_super() != NULL) {
3779 tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
3780 }
3781 // print out each of the interface classes referred to by this class.
3782 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
3783 if (local_interfaces != NULL) {
3784 int length = local_interfaces->length();
3785 for (int i = 0; i < length; i++) {
3786 Klass* k = local_interfaces->at(i);
3787 InstanceKlass* to_class = InstanceKlass::cast(k);
3788 const char * to = to_class->external_name();
3789 tty->print("RESOLVE %s %s (interface)\n", from, to);
3790 }
3791 }
3792 }
3793
3794 #ifndef PRODUCT
3795 if( PrintCompactFieldsSavings ) {
3796 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3797 tty->print("[Saved %d of %d bytes in %s]\n",
3798 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3799 orig_nonstatic_field_size*heapOopSize,
3800 this_klass->external_name());
3801 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3802 tty->print("[Wasted %d over %d bytes in %s]\n",
3803 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3804 orig_nonstatic_field_size*heapOopSize,
3805 this_klass->external_name());
3806 }
3807 }
3808 #endif
3809
3810 // preserve result across HandleMark
3811 preserve_this_klass = this_klass();
3812 }
3813
3814 // Create new handle outside HandleMark (might be needed for
3815 // Extended Class Redefinition)
3816 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3817 debug_only(this_klass->verify();)
3818
3819 return this_klass;
3820 }
3821
3822
3823 unsigned int
3824 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3825 unsigned int nonstatic_oop_map_count,
3826 int first_nonstatic_oop_offset) {
3827 unsigned int map_count =
3828 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3829 if (nonstatic_oop_map_count > 0) {
3830 // We have oops to add to map
3831 if (map_count == 0) {
3832 map_count = nonstatic_oop_map_count;
3833 } else {
3834 // Check whether we should add a new map block or whether the last one can
3835 // be extended
3836 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3837 OopMapBlock* const last_map = first_map + map_count - 1;
3838
3839 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3840 if (next_offset == first_nonstatic_oop_offset) {
3841 // There is no gap bettwen superklass's last oop field and first
3842 // local oop field, merge maps.
3843 nonstatic_oop_map_count -= 1;
3844 } else {
3845 // Superklass didn't end with a oop field, add extra maps
3846 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3847 }
3848 map_count += nonstatic_oop_map_count;
3849 }
3850 }
3851 return map_count;
3852 }
3853
3854
3855 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3856 unsigned int nonstatic_oop_map_count,
3857 int* nonstatic_oop_offsets,
3858 unsigned int* nonstatic_oop_counts) {
3859 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3860 const InstanceKlass* const super = k->superklass();
3861 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3862 if (super_count > 0) {
3863 // Copy maps from superklass
3864 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3865 for (unsigned int i = 0; i < super_count; ++i) {
3866 *this_oop_map++ = *super_oop_map++;
3867 }
3868 }
3869
3870 if (nonstatic_oop_map_count > 0) {
3871 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3872 // The counts differ because there is no gap between superklass's last oop
3873 // field and the first local oop field. Extend the last oop map copied
3874 // from the superklass instead of creating new one.
3875 nonstatic_oop_map_count--;
3876 nonstatic_oop_offsets++;
3877 this_oop_map--;
3878 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3879 this_oop_map++;
3880 }
3881
3882 // Add new map blocks, fill them
3883 while (nonstatic_oop_map_count-- > 0) {
3884 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3885 this_oop_map->set_count(*nonstatic_oop_counts++);
3886 this_oop_map++;
3887 }
3888 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3889 this_oop_map, "sanity");
3890 }
3891 }
3892
3893
3894 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3895 Klass* super = k->super();
3896
3897 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3898 // in which case we don't have to register objects as finalizable
3899 if (!_has_empty_finalizer) {
3900 if (_has_finalizer ||
3901 (super != NULL && super->has_finalizer())) {
3902 k->set_has_finalizer();
3903 }
3904 }
3905
3906 #ifdef ASSERT
3907 bool f = false;
3908 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
3909 vmSymbols::void_method_signature());
3910 if (m != NULL && !m->is_empty_method()) {
3911 f = true;
3912 }
3913 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3914 #endif
3915
3916 // Check if this klass supports the java.lang.Cloneable interface
3917 if (SystemDictionary::Cloneable_klass_loaded()) {
3918 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3919 k->set_is_cloneable();
3920 }
3921 }
3922
3923 // Check if this klass has a vanilla default constructor
3924 if (super == NULL) {
3925 // java.lang.Object has empty default constructor
3926 k->set_has_vanilla_constructor();
3927 } else {
3928 if (Klass::cast(super)->has_vanilla_constructor() &&
3929 _has_vanilla_constructor) {
3930 k->set_has_vanilla_constructor();
3931 }
3932 #ifdef ASSERT
3933 bool v = false;
3934 if (Klass::cast(super)->has_vanilla_constructor()) {
3935 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
3936 ), vmSymbols::void_method_signature());
3937 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3938 v = true;
3939 }
3940 }
3941 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3942 #endif
3943 }
3944
3945 // If it cannot be fast-path allocated, set a bit in the layout helper.
3946 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3947 assert(k->size_helper() > 0, "layout_helper is initialized");
3948 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3949 || k->is_abstract() || k->is_interface()
3950 || (k->name() == vmSymbols::java_lang_Class()
3951 && k->class_loader_data()->is_the_null_class_loader_data())
3952 || k->size_helper() >= FastAllocateSizeLimit) {
3953 // Forbid fast-path allocation.
3954 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3955 k->set_layout_helper(lh);
3956 }
3957 }
3958
3959 // Attach super classes and interface classes to class loader data
3960 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
3961 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
3962 if (defining_loader_data->is_the_null_class_loader_data()) {
3963 // Dependencies to null class loader data are implicit.
3964 return;
3965 } else {
3966 // add super class dependency
3967 Klass* super = defined_klass->super();
3968 if (super != NULL) {
3969 defining_loader_data->record_dependency(super, CHECK);
3970 }
3971
3972 // add super interface dependencies
3973 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
3974 if (local_interfaces != NULL) {
3975 int length = local_interfaces->length();
3976 for (int i = 0; i < length; i++) {
3977 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
3978 }
3979 }
3980 }
3981 }
3982
3983 // utility method for appending and array with check for duplicates
3984
3985 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
3986 // iterate over new interfaces
3987 for (int i = 0; i < ifs->length(); i++) {
3988 Klass* e = ifs->at(i);
3989 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
3990 // add new interface
3991 result->append_if_missing(e);
3992 }
3993 }
3994
3995
3996 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(ClassLoaderData* loader_data, instanceKlassHandle super, Array<Klass*>* local_ifs, TRAPS) {
3997 // Compute maximum size for transitive interfaces
3998 int max_transitive_size = 0;
3999 int super_size = 0;
4000 // Add superclass transitive interfaces size
4001 if (super.not_null()) {
4002 super_size = super->transitive_interfaces()->length();
4003 max_transitive_size += super_size;
4004 }
4005 // Add local interfaces' super interfaces
4006 int local_size = local_ifs->length();
4007 for (int i = 0; i < local_size; i++) {
4008 Klass* l = local_ifs->at(i);
4009 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4010 }
4011 // Finally add local interfaces
4012 max_transitive_size += local_size;
4013 // Construct array
4014 if (max_transitive_size == 0) {
4015 // no interfaces, use canonicalized array
4016 return Universe::the_empty_klass_array();
4017 } else if (max_transitive_size == super_size) {
4018 // no new local interfaces added, share superklass' transitive interface array
4019 return super->transitive_interfaces();
4020 } else if (max_transitive_size == local_size) {
4021 // only local interfaces added, share local interface array
4022 return local_ifs;
4023 } else {
4024 ResourceMark rm;
4025 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4026
4027 // Copy down from superclass
4028 if (super.not_null()) {
4029 append_interfaces(result, super->transitive_interfaces());
4030 }
4031
4032 // Copy down from local interfaces' superinterfaces
4033 for (int i = 0; i < local_ifs->length(); i++) {
4034 Klass* l = local_ifs->at(i);
4035 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4036 }
4037 // Finally add local interfaces
4038 append_interfaces(result, local_ifs);
4039
4040 // length will be less than the max_transitive_size if duplicates were removed
4041 int length = result->length();
4042 assert(length <= max_transitive_size, "just checking");
4043 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4044 for (int i = 0; i < length; i++) {
4045 Klass* e = result->at(i);
4046 assert(e != NULL, "just checking");
4047 new_result->at_put(i, e);
4048 }
4049 return new_result;
4050 }
4051 }
4052
4053
4054 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4055 Klass* super = this_klass->super();
4056 if ((super != NULL) &&
4057 (!Reflection::verify_class_access(this_klass(), super, false))) {
4058 ResourceMark rm(THREAD);
4059 Exceptions::fthrow(
4060 THREAD_AND_LOCATION,
4061 vmSymbols::java_lang_IllegalAccessError(),
4062 "class %s cannot access its superclass %s",
4063 this_klass->external_name(),
4064 InstanceKlass::cast(super)->external_name()
4065 );
4066 return;
4067 }
4068 }
4069
4070
4071 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4072 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4073 int lng = local_interfaces->length();
4074 for (int i = lng - 1; i >= 0; i--) {
4075 Klass* k = local_interfaces->at(i);
4076 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
4077 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4078 ResourceMark rm(THREAD);
4079 Exceptions::fthrow(
4080 THREAD_AND_LOCATION,
4081 vmSymbols::java_lang_IllegalAccessError(),
4082 "class %s cannot access its superinterface %s",
4083 this_klass->external_name(),
4084 InstanceKlass::cast(k)->external_name()
4085 );
4086 return;
4087 }
4088 }
4089 }
4090
4091
4092 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4093 Array<Method*>* methods = this_klass->methods();
4094 int num_methods = methods->length();
4095
4096 // go thru each method and check if it overrides a final method
4097 for (int index = 0; index < num_methods; index++) {
4098 Method* m = methods->at(index);
4099
4100 // skip private, static and <init> methods
4101 if ((!m->is_private()) &&
4102 (!m->is_static()) &&
4103 (m->name() != vmSymbols::object_initializer_name())) {
4104
4105 Symbol* name = m->name();
4106 Symbol* signature = m->signature();
4107 Klass* k = this_klass->super();
4108 Method* super_m = NULL;
4109 while (k != NULL) {
4110 // skip supers that don't have final methods.
4111 if (k->has_final_method()) {
4112 // lookup a matching method in the super class hierarchy
4113 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4114 if (super_m == NULL) {
4115 break; // didn't find any match; get out
4116 }
4117
4118 if (super_m->is_final() &&
4119 // matching method in super is final
4120 (Reflection::verify_field_access(this_klass(),
4121 super_m->method_holder(),
4122 super_m->method_holder(),
4123 super_m->access_flags(), false))
4124 // this class can access super final method and therefore override
4125 ) {
4126 ResourceMark rm(THREAD);
4127 Exceptions::fthrow(
4128 THREAD_AND_LOCATION,
4129 vmSymbols::java_lang_VerifyError(),
4130 "class %s overrides final method %s.%s",
4131 this_klass->external_name(),
4132 name->as_C_string(),
4133 signature->as_C_string()
4134 );
4135 return;
4136 }
4137
4138 // continue to look from super_m's holder's super.
4139 k = InstanceKlass::cast(super_m->method_holder())->super();
4140 continue;
4141 }
4142
4143 k = k->super();
4144 }
4145 }
4146 }
4147 }
4148
4149
4150 // assumes that this_klass is an interface
4151 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4152 assert(this_klass->is_interface(), "not an interface");
4153 Array<Method*>* methods = this_klass->methods();
4154 int num_methods = methods->length();
4155
4156 for (int index = 0; index < num_methods; index++) {
4157 Method* m = methods->at(index);
4158 // if m is static and not the init method, throw a verify error
4159 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4160 ResourceMark rm(THREAD);
4161 Exceptions::fthrow(
4162 THREAD_AND_LOCATION,
4163 vmSymbols::java_lang_VerifyError(),
4164 "Illegal static method %s in interface %s",
4165 m->name()->as_C_string(),
4166 this_klass->external_name()
4167 );
4168 return;
4169 }
4170 }
4171 }
4172
4173 // utility methods for format checking
4174
4175 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4176 if (!_need_verify) { return; }
4177
4178 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4179 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4180 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4181 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4182 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4183 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4184 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4185
4186 if ((is_abstract && is_final) ||
4187 (is_interface && !is_abstract) ||
4188 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4189 (!is_interface && major_gte_15 && is_annotation)) {
4190 ResourceMark rm(THREAD);
4191 Exceptions::fthrow(
4192 THREAD_AND_LOCATION,
4193 vmSymbols::java_lang_ClassFormatError(),
4194 "Illegal class modifiers in class %s: 0x%X",
4195 _class_name->as_C_string(), flags
4196 );
4197 return;
4198 }
4199 }
4200
4201 bool ClassFileParser::has_illegal_visibility(jint flags) {
4202 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4203 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4204 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4205
4206 return ((is_public && is_protected) ||
4207 (is_public && is_private) ||
4208 (is_protected && is_private));
4209 }
4210
4211 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4212 u2 max_version =
4213 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4214 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4215 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4216 (major <= max_version) &&
4217 ((major != max_version) ||
4218 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4219 }
4220
4221 void ClassFileParser::verify_legal_field_modifiers(
4222 jint flags, bool is_interface, TRAPS) {
4223 if (!_need_verify) { return; }
4224
4225 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4226 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4227 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4228 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4229 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4230 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4231 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4232 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4233 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4234
4235 bool is_illegal = false;
4236
4237 if (is_interface) {
4238 if (!is_public || !is_static || !is_final || is_private ||
4239 is_protected || is_volatile || is_transient ||
4240 (major_gte_15 && is_enum)) {
4241 is_illegal = true;
4242 }
4243 } else { // not interface
4244 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4245 is_illegal = true;
4246 }
4247 }
4248
4249 if (is_illegal) {
4250 ResourceMark rm(THREAD);
4251 Exceptions::fthrow(
4252 THREAD_AND_LOCATION,
4253 vmSymbols::java_lang_ClassFormatError(),
4254 "Illegal field modifiers in class %s: 0x%X",
4255 _class_name->as_C_string(), flags);
4256 return;
4257 }
4258 }
4259
4260 void ClassFileParser::verify_legal_method_modifiers(
4261 jint flags, bool is_interface, Symbol* name, TRAPS) {
4262 if (!_need_verify) { return; }
4263
4264 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4265 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4266 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4267 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4268 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4269 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4270 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4271 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4272 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4273 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4274 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4275
4276 bool is_illegal = false;
4277
4278 if (is_interface) {
4279 if (!is_abstract || !is_public || is_static || is_final ||
4280 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4281 is_illegal = true;
4282 }
4283 } else { // not interface
4284 if (is_initializer) {
4285 if (is_static || is_final || is_synchronized || is_native ||
4286 is_abstract || (major_gte_15 && is_bridge)) {
4287 is_illegal = true;
4288 }
4289 } else { // not initializer
4290 if (is_abstract) {
4291 if ((is_final || is_native || is_private || is_static ||
4292 (major_gte_15 && (is_synchronized || is_strict)))) {
4293 is_illegal = true;
4294 }
4295 }
4296 if (has_illegal_visibility(flags)) {
4297 is_illegal = true;
4298 }
4299 }
4300 }
4301
4302 if (is_illegal) {
4303 ResourceMark rm(THREAD);
4304 Exceptions::fthrow(
4305 THREAD_AND_LOCATION,
4306 vmSymbols::java_lang_ClassFormatError(),
4307 "Method %s in class %s has illegal modifiers: 0x%X",
4308 name->as_C_string(), _class_name->as_C_string(), flags);
4309 return;
4310 }
4311 }
4312
4313 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4314 assert(_need_verify, "only called when _need_verify is true");
4315 int i = 0;
4316 int count = length >> 2;
4317 for (int k=0; k<count; k++) {
4318 unsigned char b0 = buffer[i];
4319 unsigned char b1 = buffer[i+1];
4320 unsigned char b2 = buffer[i+2];
4321 unsigned char b3 = buffer[i+3];
4322 // For an unsigned char v,
4323 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4324 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4325 unsigned char res = b0 | b0 - 1 |
4326 b1 | b1 - 1 |
4327 b2 | b2 - 1 |
4328 b3 | b3 - 1;
4329 if (res >= 128) break;
4330 i += 4;
4331 }
4332 for(; i < length; i++) {
4333 unsigned short c;
4334 // no embedded zeros
4335 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4336 if(buffer[i] < 128) {
4337 continue;
4338 }
4339 if ((i + 5) < length) { // see if it's legal supplementary character
4340 if (UTF8::is_supplementary_character(&buffer[i])) {
4341 c = UTF8::get_supplementary_character(&buffer[i]);
4342 i += 5;
4343 continue;
4344 }
4345 }
4346 switch (buffer[i] >> 4) {
4347 default: break;
4348 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4349 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4350 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4351 c = (buffer[i] & 0x1F) << 6;
4352 i++;
4353 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4354 c += buffer[i] & 0x3F;
4355 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4356 // for classes with major > 47, c must a null or a character in its shortest form
4357 break;
4358 }
4359 }
4360 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4361 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4362 c = (buffer[i] & 0xF) << 12;
4363 i += 2;
4364 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4365 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4366 if (_major_version <= 47 || c >= 0x800) {
4367 // for classes with major > 47, c must be in its shortest form
4368 break;
4369 }
4370 }
4371 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4372 } // end of switch
4373 } // end of for
4374 }
4375
4376 // Checks if name is a legal class name.
4377 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4378 if (!_need_verify || _relax_verify) { return; }
4379
4380 char buf[fixed_buffer_size];
4381 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4382 unsigned int length = name->utf8_length();
4383 bool legal = false;
4384
4385 if (length > 0) {
4386 char* p;
4387 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4388 p = skip_over_field_signature(bytes, false, length, CHECK);
4389 legal = (p != NULL) && ((p - bytes) == (int)length);
4390 } else if (_major_version < JAVA_1_5_VERSION) {
4391 if (bytes[0] != '<') {
4392 p = skip_over_field_name(bytes, true, length);
4393 legal = (p != NULL) && ((p - bytes) == (int)length);
4394 }
4395 } else {
4396 // 4900761: relax the constraints based on JSR202 spec
4397 // Class names may be drawn from the entire Unicode character set.
4398 // Identifiers between '/' must be unqualified names.
4399 // The utf8 string has been verified when parsing cpool entries.
4400 legal = verify_unqualified_name(bytes, length, LegalClass);
4401 }
4402 }
4403 if (!legal) {
4404 ResourceMark rm(THREAD);
4405 Exceptions::fthrow(
4406 THREAD_AND_LOCATION,
4407 vmSymbols::java_lang_ClassFormatError(),
4408 "Illegal class name \"%s\" in class file %s", bytes,
4409 _class_name->as_C_string()
4410 );
4411 return;
4412 }
4413 }
4414
4415 // Checks if name is a legal field name.
4416 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4417 if (!_need_verify || _relax_verify) { return; }
4418
4419 char buf[fixed_buffer_size];
4420 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4421 unsigned int length = name->utf8_length();
4422 bool legal = false;
4423
4424 if (length > 0) {
4425 if (_major_version < JAVA_1_5_VERSION) {
4426 if (bytes[0] != '<') {
4427 char* p = skip_over_field_name(bytes, false, length);
4428 legal = (p != NULL) && ((p - bytes) == (int)length);
4429 }
4430 } else {
4431 // 4881221: relax the constraints based on JSR202 spec
4432 legal = verify_unqualified_name(bytes, length, LegalField);
4433 }
4434 }
4435
4436 if (!legal) {
4437 ResourceMark rm(THREAD);
4438 Exceptions::fthrow(
4439 THREAD_AND_LOCATION,
4440 vmSymbols::java_lang_ClassFormatError(),
4441 "Illegal field name \"%s\" in class %s", bytes,
4442 _class_name->as_C_string()
4443 );
4444 return;
4445 }
4446 }
4447
4448 // Checks if name is a legal method name.
4449 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4450 if (!_need_verify || _relax_verify) { return; }
4451
4452 assert(name != NULL, "method name is null");
4453 char buf[fixed_buffer_size];
4454 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4455 unsigned int length = name->utf8_length();
4456 bool legal = false;
4457
4458 if (length > 0) {
4459 if (bytes[0] == '<') {
4460 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4461 legal = true;
4462 }
4463 } else if (_major_version < JAVA_1_5_VERSION) {
4464 char* p;
4465 p = skip_over_field_name(bytes, false, length);
4466 legal = (p != NULL) && ((p - bytes) == (int)length);
4467 } else {
4468 // 4881221: relax the constraints based on JSR202 spec
4469 legal = verify_unqualified_name(bytes, length, LegalMethod);
4470 }
4471 }
4472
4473 if (!legal) {
4474 ResourceMark rm(THREAD);
4475 Exceptions::fthrow(
4476 THREAD_AND_LOCATION,
4477 vmSymbols::java_lang_ClassFormatError(),
4478 "Illegal method name \"%s\" in class %s", bytes,
4479 _class_name->as_C_string()
4480 );
4481 return;
4482 }
4483 }
4484
4485
4486 // Checks if signature is a legal field signature.
4487 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4488 if (!_need_verify) { return; }
4489
4490 char buf[fixed_buffer_size];
4491 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4492 unsigned int length = signature->utf8_length();
4493 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4494
4495 if (p == NULL || (p - bytes) != (int)length) {
4496 throwIllegalSignature("Field", name, signature, CHECK);
4497 }
4498 }
4499
4500 // Checks if signature is a legal method signature.
4501 // Returns number of parameters
4502 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4503 if (!_need_verify) {
4504 // make sure caller's args_size will be less than 0 even for non-static
4505 // method so it will be recomputed in compute_size_of_parameters().
4506 return -2;
4507 }
4508
4509 unsigned int args_size = 0;
4510 char buf[fixed_buffer_size];
4511 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4512 unsigned int length = signature->utf8_length();
4513 char* nextp;
4514
4515 // The first character must be a '('
4516 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4517 length--;
4518 // Skip over legal field signatures
4519 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4520 while ((length > 0) && (nextp != NULL)) {
4521 args_size++;
4522 if (p[0] == 'J' || p[0] == 'D') {
4523 args_size++;
4524 }
4525 length -= nextp - p;
4526 p = nextp;
4527 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4528 }
4529 // The first non-signature thing better be a ')'
4530 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4531 length--;
4532 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4533 // All internal methods must return void
4534 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4535 return args_size;
4536 }
4537 } else {
4538 // Now we better just have a return value
4539 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4540 if (nextp && ((int)length == (nextp - p))) {
4541 return args_size;
4542 }
4543 }
4544 }
4545 }
4546 // Report error
4547 throwIllegalSignature("Method", name, signature, CHECK_0);
4548 return 0;
4549 }
4550
4551
4552 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4553 // Method names also may not contain the characters '<' or '>', unless <init>
4554 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4555 // method. Because these names have been checked as special cases before
4556 // calling this method in verify_legal_method_name.
4557 bool ClassFileParser::verify_unqualified_name(
4558 char* name, unsigned int length, int type) {
4559 jchar ch;
4560
4561 for (char* p = name; p != name + length; ) {
4562 ch = *p;
4563 if (ch < 128) {
4564 p++;
4565 if (ch == '.' || ch == ';' || ch == '[' ) {
4566 return false; // do not permit '.', ';', or '['
4567 }
4568 if (type != LegalClass && ch == '/') {
4569 return false; // do not permit '/' unless it's class name
4570 }
4571 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4572 return false; // do not permit '<' or '>' in method names
4573 }
4574 } else {
4575 char* tmp_p = UTF8::next(p, &ch);
4576 p = tmp_p;
4577 }
4578 }
4579 return true;
4580 }
4581
4582
4583 // Take pointer to a string. Skip over the longest part of the string that could
4584 // be taken as a fieldname. Allow '/' if slash_ok is true.
4585 // Return a pointer to just past the fieldname.
4586 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4587 // being true, we saw consecutive slashes (meaning we were looking for a
4588 // qualified path but found something that was badly-formed).
4589 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4590 char* p;
4591 jchar ch;
4592 jboolean last_is_slash = false;
4593 jboolean not_first_ch = false;
4594
4595 for (p = name; p != name + length; not_first_ch = true) {
4596 char* old_p = p;
4597 ch = *p;
4598 if (ch < 128) {
4599 p++;
4600 // quick check for ascii
4601 if ((ch >= 'a' && ch <= 'z') ||
4602 (ch >= 'A' && ch <= 'Z') ||
4603 (ch == '_' || ch == '$') ||
4604 (not_first_ch && ch >= '0' && ch <= '9')) {
4605 last_is_slash = false;
4606 continue;
4607 }
4608 if (slash_ok && ch == '/') {
4609 if (last_is_slash) {
4610 return NULL; // Don't permit consecutive slashes
4611 }
4612 last_is_slash = true;
4613 continue;
4614 }
4615 } else {
4616 jint unicode_ch;
4617 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4618 p = tmp_p;
4619 last_is_slash = false;
4620 // Check if ch is Java identifier start or is Java identifier part
4621 // 4672820: call java.lang.Character methods directly without generating separate tables.
4622 EXCEPTION_MARK;
4623 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4624
4625 // return value
4626 JavaValue result(T_BOOLEAN);
4627 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4628 JavaCallArguments args;
4629 args.push_int(unicode_ch);
4630
4631 // public static boolean isJavaIdentifierStart(char ch);
4632 JavaCalls::call_static(&result,
4633 klass,
4634 vmSymbols::isJavaIdentifierStart_name(),
4635 vmSymbols::int_bool_signature(),
4636 &args,
4637 THREAD);
4638
4639 if (HAS_PENDING_EXCEPTION) {
4640 CLEAR_PENDING_EXCEPTION;
4641 return 0;
4642 }
4643 if (result.get_jboolean()) {
4644 continue;
4645 }
4646
4647 if (not_first_ch) {
4648 // public static boolean isJavaIdentifierPart(char ch);
4649 JavaCalls::call_static(&result,
4650 klass,
4651 vmSymbols::isJavaIdentifierPart_name(),
4652 vmSymbols::int_bool_signature(),
4653 &args,
4654 THREAD);
4655
4656 if (HAS_PENDING_EXCEPTION) {
4657 CLEAR_PENDING_EXCEPTION;
4658 return 0;
4659 }
4660
4661 if (result.get_jboolean()) {
4662 continue;
4663 }
4664 }
4665 }
4666 return (not_first_ch) ? old_p : NULL;
4667 }
4668 return (not_first_ch) ? p : NULL;
4669 }
4670
4671
4672 // Take pointer to a string. Skip over the longest part of the string that could
4673 // be taken as a field signature. Allow "void" if void_ok.
4674 // Return a pointer to just past the signature.
4675 // Return NULL if no legal signature is found.
4676 char* ClassFileParser::skip_over_field_signature(char* signature,
4677 bool void_ok,
4678 unsigned int length,
4679 TRAPS) {
4680 unsigned int array_dim = 0;
4681 while (length > 0) {
4682 switch (signature[0]) {
4683 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4684 case JVM_SIGNATURE_BOOLEAN:
4685 case JVM_SIGNATURE_BYTE:
4686 case JVM_SIGNATURE_CHAR:
4687 case JVM_SIGNATURE_SHORT:
4688 case JVM_SIGNATURE_INT:
4689 case JVM_SIGNATURE_FLOAT:
4690 case JVM_SIGNATURE_LONG:
4691 case JVM_SIGNATURE_DOUBLE:
4692 return signature + 1;
4693 case JVM_SIGNATURE_CLASS: {
4694 if (_major_version < JAVA_1_5_VERSION) {
4695 // Skip over the class name if one is there
4696 char* p = skip_over_field_name(signature + 1, true, --length);
4697
4698 // The next character better be a semicolon
4699 if (p && (p - signature) > 1 && p[0] == ';') {
4700 return p + 1;
4701 }
4702 } else {
4703 // 4900761: For class version > 48, any unicode is allowed in class name.
4704 length--;
4705 signature++;
4706 while (length > 0 && signature[0] != ';') {
4707 if (signature[0] == '.') {
4708 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4709 }
4710 length--;
4711 signature++;
4712 }
4713 if (signature[0] == ';') { return signature + 1; }
4714 }
4715
4716 return NULL;
4717 }
4718 case JVM_SIGNATURE_ARRAY:
4719 array_dim++;
4720 if (array_dim > 255) {
4721 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4722 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4723 }
4724 // The rest of what's there better be a legal signature
4725 signature++;
4726 length--;
4727 void_ok = false;
4728 break;
4729
4730 default:
4731 return NULL;
4732 }
4733 }
4734 return NULL;
4735 }