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