1 /*
2 * Copyright (c) 1997, 2016, 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 #include "precompiled.hpp"
25 #include "classfile/classFileParser.hpp"
26 #include "classfile/classFileStream.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/defaultMethods.hpp"
30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/moduleEntry.hpp"
32 #include "classfile/symbolTable.hpp"
33 #include "classfile/systemDictionary.hpp"
34 #include "classfile/verificationType.hpp"
35 #include "classfile/verifier.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "gc/shared/gcLocker.hpp"
38 #include "logging/log.hpp"
39 #include "memory/allocation.hpp"
40 #include "memory/metadataFactory.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/annotations.hpp"
45 #include "oops/fieldStreams.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.inline.hpp"
49 #include "oops/klassVtable.hpp"
50 #include "oops/metadata.hpp"
51 #include "oops/method.hpp"
52 #include "oops/oop.inline.hpp"
53 #include "oops/symbol.hpp"
54 #include "prims/jvm.h"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/jvmtiThreadState.hpp"
57 #include "runtime/javaCalls.hpp"
58 #include "runtime/perfData.hpp"
59 #include "runtime/reflection.hpp"
60 #include "runtime/signature.hpp"
61 #include "runtime/timer.hpp"
62 #include "services/classLoadingService.hpp"
63 #include "services/threadService.hpp"
64 #include "trace/traceMacros.hpp"
65 #include "utilities/array.hpp"
66 #include "utilities/exceptions.hpp"
67 #include "utilities/globalDefinitions.hpp"
68 #include "utilities/macros.hpp"
69 #include "utilities/ostream.hpp"
70 #include "utilities/resourceHash.hpp"
71 #if INCLUDE_CDS
72 #include "classfile/systemDictionaryShared.hpp"
73 #endif
74
75 // We generally try to create the oops directly when parsing, rather than
76 // allocating temporary data structures and copying the bytes twice. A
77 // temporary area is only needed when parsing utf8 entries in the constant
78 // pool and when parsing line number tables.
79
80 // We add assert in debug mode when class format is not checked.
81
82 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
83 #define JAVA_MIN_SUPPORTED_VERSION 45
84 #define JAVA_MAX_SUPPORTED_VERSION 53
85 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
86
87 // Used for two backward compatibility reasons:
88 // - to check for new additions to the class file format in JDK1.5
89 // - to check for bug fixes in the format checker in JDK1.5
90 #define JAVA_1_5_VERSION 49
91
92 // Used for backward compatibility reasons:
93 // - to check for javac bug fixes that happened after 1.5
94 // - also used as the max version when running in jdk6
95 #define JAVA_6_VERSION 50
96
97 // Used for backward compatibility reasons:
98 // - to disallow argument and require ACC_STATIC for <clinit> methods
99 #define JAVA_7_VERSION 51
100
101 // Extension method support.
102 #define JAVA_8_VERSION 52
103
104 #define JAVA_9_VERSION 53
105
106 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
107 ConstantPool* cp,
108 const int length,
109 TRAPS) {
110 assert(stream != NULL, "invariant");
111 assert(cp != NULL, "invariant");
112
113 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
114 // this function (_current can be allocated in a register, with scalar
115 // replacement of aggregates). The _current pointer is copied back to
116 // stream() when this function returns. DON'T call another method within
117 // this method that uses stream().
118 const ClassFileStream cfs1 = *stream;
119 const ClassFileStream* const cfs = &cfs1;
120
121 assert(cfs->allocated_on_stack(), "should be local");
122 debug_only(const u1* const old_current = stream->current();)
123
124 // Used for batching symbol allocations.
125 const char* names[SymbolTable::symbol_alloc_batch_size];
126 int lengths[SymbolTable::symbol_alloc_batch_size];
127 int indices[SymbolTable::symbol_alloc_batch_size];
128 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
129 int names_count = 0;
130
131 // parsing Index 0 is unused
132 for (int index = 1; index < length; index++) {
133 // Each of the following case guarantees one more byte in the stream
134 // for the following tag or the access_flags following constant pool,
135 // so we don't need bounds-check for reading tag.
136 const u1 tag = cfs->get_u1_fast();
137 switch (tag) {
138 case JVM_CONSTANT_Class : {
139 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
140 const u2 name_index = cfs->get_u2_fast();
141 cp->klass_index_at_put(index, name_index);
142 break;
143 }
144 case JVM_CONSTANT_Fieldref: {
145 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
146 const u2 class_index = cfs->get_u2_fast();
147 const u2 name_and_type_index = cfs->get_u2_fast();
148 cp->field_at_put(index, class_index, name_and_type_index);
149 break;
150 }
151 case JVM_CONSTANT_Methodref: {
152 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
153 const u2 class_index = cfs->get_u2_fast();
154 const u2 name_and_type_index = cfs->get_u2_fast();
155 cp->method_at_put(index, class_index, name_and_type_index);
156 break;
157 }
158 case JVM_CONSTANT_InterfaceMethodref: {
159 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
160 const u2 class_index = cfs->get_u2_fast();
161 const u2 name_and_type_index = cfs->get_u2_fast();
162 cp->interface_method_at_put(index, class_index, name_and_type_index);
163 break;
164 }
165 case JVM_CONSTANT_String : {
166 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
167 const u2 string_index = cfs->get_u2_fast();
168 cp->string_index_at_put(index, string_index);
169 break;
170 }
171 case JVM_CONSTANT_MethodHandle :
172 case JVM_CONSTANT_MethodType: {
173 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
174 classfile_parse_error(
175 "Class file version does not support constant tag %u in class file %s",
176 tag, CHECK);
177 }
178 if (tag == JVM_CONSTANT_MethodHandle) {
179 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
180 const u1 ref_kind = cfs->get_u1_fast();
181 const u2 method_index = cfs->get_u2_fast();
182 cp->method_handle_index_at_put(index, ref_kind, method_index);
183 }
184 else if (tag == JVM_CONSTANT_MethodType) {
185 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
186 const u2 signature_index = cfs->get_u2_fast();
187 cp->method_type_index_at_put(index, signature_index);
188 }
189 else {
190 ShouldNotReachHere();
191 }
192 break;
193 }
194 case JVM_CONSTANT_InvokeDynamic : {
195 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
196 classfile_parse_error(
197 "Class file version does not support constant tag %u in class file %s",
198 tag, CHECK);
199 }
200 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
201 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
202 const u2 name_and_type_index = cfs->get_u2_fast();
203 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
204 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
205 }
206 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
207 break;
208 }
209 case JVM_CONSTANT_Integer: {
210 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
211 const u4 bytes = cfs->get_u4_fast();
212 cp->int_at_put(index, (jint)bytes);
213 break;
214 }
215 case JVM_CONSTANT_Float: {
216 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
217 const u4 bytes = cfs->get_u4_fast();
218 cp->float_at_put(index, *(jfloat*)&bytes);
219 break;
220 }
221 case JVM_CONSTANT_Long: {
222 // A mangled type might cause you to overrun allocated memory
223 guarantee_property(index + 1 < length,
224 "Invalid constant pool entry %u in class file %s",
225 index,
226 CHECK);
227 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
228 const u8 bytes = cfs->get_u8_fast();
229 cp->long_at_put(index, bytes);
230 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
231 break;
232 }
233 case JVM_CONSTANT_Double: {
234 // A mangled type might cause you to overrun allocated memory
235 guarantee_property(index+1 < length,
236 "Invalid constant pool entry %u in class file %s",
237 index,
238 CHECK);
239 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
240 const u8 bytes = cfs->get_u8_fast();
241 cp->double_at_put(index, *(jdouble*)&bytes);
242 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
243 break;
244 }
245 case JVM_CONSTANT_NameAndType: {
246 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
247 const u2 name_index = cfs->get_u2_fast();
248 const u2 signature_index = cfs->get_u2_fast();
249 cp->name_and_type_at_put(index, name_index, signature_index);
250 break;
251 }
252 case JVM_CONSTANT_Utf8 : {
253 cfs->guarantee_more(2, CHECK); // utf8_length
254 u2 utf8_length = cfs->get_u2_fast();
255 const u1* utf8_buffer = cfs->get_u1_buffer();
256 assert(utf8_buffer != NULL, "null utf8 buffer");
257 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
258 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
259 cfs->skip_u1_fast(utf8_length);
260
261 // Before storing the symbol, make sure it's legal
262 if (_need_verify) {
263 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
264 }
265
266 if (has_cp_patch_at(index)) {
267 Handle patch = clear_cp_patch_at(index);
268 guarantee_property(java_lang_String::is_instance(patch()),
269 "Illegal utf8 patch at %d in class file %s",
270 index,
271 CHECK);
272 const char* const str = java_lang_String::as_utf8_string(patch());
273 // (could use java_lang_String::as_symbol instead, but might as well batch them)
274 utf8_buffer = (const u1*) str;
275 utf8_length = (int) strlen(str);
276 }
277
278 unsigned int hash;
279 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
280 utf8_length,
281 hash);
282 if (result == NULL) {
283 names[names_count] = (const char*)utf8_buffer;
284 lengths[names_count] = utf8_length;
285 indices[names_count] = index;
286 hashValues[names_count++] = hash;
287 if (names_count == SymbolTable::symbol_alloc_batch_size) {
288 SymbolTable::new_symbols(_loader_data,
289 cp,
290 names_count,
291 names,
292 lengths,
293 indices,
294 hashValues,
295 CHECK);
296 names_count = 0;
297 }
298 } else {
299 cp->symbol_at_put(index, result);
300 }
301 break;
302 }
303 default: {
304 classfile_parse_error("Unknown constant tag %u in class file %s",
305 tag,
306 CHECK);
307 break;
308 }
309 } // end of switch(tag)
310 } // end of for
311
312 // Allocate the remaining symbols
313 if (names_count > 0) {
314 SymbolTable::new_symbols(_loader_data,
315 cp,
316 names_count,
317 names,
318 lengths,
319 indices,
320 hashValues,
321 CHECK);
322 }
323
324 // Copy _current pointer of local copy back to stream.
325 assert(stream->current() == old_current, "non-exclusive use of stream");
326 stream->set_current(cfs1.current());
327
328 }
329
330 static inline bool valid_cp_range(int index, int length) {
331 return (index > 0 && index < length);
332 }
333
334 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
335 assert(cp != NULL, "invariant");
336 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
337 return cp->symbol_at(index);
338 }
339 return NULL;
340 }
341
342 #ifdef ASSERT
343 PRAGMA_DIAG_PUSH
344 PRAGMA_FORMAT_NONLITERAL_IGNORED
345 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
346 ResourceMark rm(THREAD);
347 fatal(msg, _class_name->as_C_string());
348 }
349
350 void ClassFileParser::report_assert_property_failure(const char* msg,
351 int index,
352 TRAPS) const {
353 ResourceMark rm(THREAD);
354 fatal(msg, index, _class_name->as_C_string());
355 }
356 PRAGMA_DIAG_POP
357 #endif
358
359 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
360 ConstantPool* const cp,
361 const int length,
362 TRAPS) {
363 assert(cp != NULL, "invariant");
364 assert(stream != NULL, "invariant");
365
366 // parsing constant pool entries
367 parse_constant_pool_entries(stream, cp, length, CHECK);
368
369 int index = 1; // declared outside of loops for portability
370
371 // first verification pass - validate cross references
372 // and fixup class and string constants
373 for (index = 1; index < length; index++) { // Index 0 is unused
374 const jbyte tag = cp->tag_at(index).value();
375 switch (tag) {
376 case JVM_CONSTANT_Class: {
377 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
378 break;
379 }
380 case JVM_CONSTANT_Fieldref:
381 // fall through
382 case JVM_CONSTANT_Methodref:
383 // fall through
384 case JVM_CONSTANT_InterfaceMethodref: {
385 if (!_need_verify) break;
386 const int klass_ref_index = cp->klass_ref_index_at(index);
387 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
388 check_property(valid_klass_reference_at(klass_ref_index),
389 "Invalid constant pool index %u in class file %s",
390 klass_ref_index, CHECK);
391 check_property(valid_cp_range(name_and_type_ref_index, length) &&
392 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
393 "Invalid constant pool index %u in class file %s",
394 name_and_type_ref_index, CHECK);
395 break;
396 }
397 case JVM_CONSTANT_String: {
398 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
399 break;
400 }
401 case JVM_CONSTANT_Integer:
402 break;
403 case JVM_CONSTANT_Float:
404 break;
405 case JVM_CONSTANT_Long:
406 case JVM_CONSTANT_Double: {
407 index++;
408 check_property(
409 (index < length && cp->tag_at(index).is_invalid()),
410 "Improper constant pool long/double index %u in class file %s",
411 index, CHECK);
412 break;
413 }
414 case JVM_CONSTANT_NameAndType: {
415 if (!_need_verify) break;
416 const int name_ref_index = cp->name_ref_index_at(index);
417 const int signature_ref_index = cp->signature_ref_index_at(index);
418 check_property(valid_symbol_at(name_ref_index),
419 "Invalid constant pool index %u in class file %s",
420 name_ref_index, CHECK);
421 check_property(valid_symbol_at(signature_ref_index),
422 "Invalid constant pool index %u in class file %s",
423 signature_ref_index, CHECK);
424 break;
425 }
426 case JVM_CONSTANT_Utf8:
427 break;
428 case JVM_CONSTANT_UnresolvedClass: // fall-through
429 case JVM_CONSTANT_UnresolvedClassInError: {
430 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
431 break;
432 }
433 case JVM_CONSTANT_ClassIndex: {
434 const int class_index = cp->klass_index_at(index);
435 check_property(valid_symbol_at(class_index),
436 "Invalid constant pool index %u in class file %s",
437 class_index, CHECK);
438 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
439 break;
440 }
441 case JVM_CONSTANT_StringIndex: {
442 const int string_index = cp->string_index_at(index);
443 check_property(valid_symbol_at(string_index),
444 "Invalid constant pool index %u in class file %s",
445 string_index, CHECK);
446 Symbol* const sym = cp->symbol_at(string_index);
447 cp->unresolved_string_at_put(index, sym);
448 break;
449 }
450 case JVM_CONSTANT_MethodHandle: {
451 const int ref_index = cp->method_handle_index_at(index);
452 check_property(valid_cp_range(ref_index, length),
453 "Invalid constant pool index %u in class file %s",
454 ref_index, CHECK);
455 const constantTag tag = cp->tag_at(ref_index);
456 const int ref_kind = cp->method_handle_ref_kind_at(index);
457
458 switch (ref_kind) {
459 case JVM_REF_getField:
460 case JVM_REF_getStatic:
461 case JVM_REF_putField:
462 case JVM_REF_putStatic: {
463 check_property(
464 tag.is_field(),
465 "Invalid constant pool index %u in class file %s (not a field)",
466 ref_index, CHECK);
467 break;
468 }
469 case JVM_REF_invokeVirtual:
470 case JVM_REF_newInvokeSpecial: {
471 check_property(
472 tag.is_method(),
473 "Invalid constant pool index %u in class file %s (not a method)",
474 ref_index, CHECK);
475 break;
476 }
477 case JVM_REF_invokeStatic:
478 case JVM_REF_invokeSpecial: {
479 check_property(
480 tag.is_method() ||
481 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
482 "Invalid constant pool index %u in class file %s (not a method)",
483 ref_index, CHECK);
484 break;
485 }
486 case JVM_REF_invokeInterface: {
487 check_property(
488 tag.is_interface_method(),
489 "Invalid constant pool index %u in class file %s (not an interface method)",
490 ref_index, CHECK);
491 break;
492 }
493 default: {
494 classfile_parse_error(
495 "Bad method handle kind at constant pool index %u in class file %s",
496 index, CHECK);
497 }
498 } // switch(refkind)
499 // Keep the ref_index unchanged. It will be indirected at link-time.
500 break;
501 } // case MethodHandle
502 case JVM_CONSTANT_MethodType: {
503 const int ref_index = cp->method_type_index_at(index);
504 check_property(valid_symbol_at(ref_index),
505 "Invalid constant pool index %u in class file %s",
506 ref_index, CHECK);
507 break;
508 }
509 case JVM_CONSTANT_InvokeDynamic: {
510 const int name_and_type_ref_index =
511 cp->invoke_dynamic_name_and_type_ref_index_at(index);
512
513 check_property(valid_cp_range(name_and_type_ref_index, length) &&
514 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
515 "Invalid constant pool index %u in class file %s",
516 name_and_type_ref_index, CHECK);
517 // bootstrap specifier index must be checked later,
518 // when BootstrapMethods attr is available
519 break;
520 }
521 default: {
522 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
523 ShouldNotReachHere();
524 break;
525 }
526 } // switch(tag)
527 } // end of for
528
529 if (_cp_patches != NULL) {
530 // need to treat this_class specially...
531 int this_class_index;
532 {
533 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
534 const u1* const mark = stream->current();
535 stream->skip_u2_fast(1); // skip flags
536 this_class_index = stream->get_u2_fast();
537 stream->set_current(mark); // revert to mark
538 }
539
540 for (index = 1; index < length; index++) { // Index 0 is unused
541 if (has_cp_patch_at(index)) {
542 guarantee_property(index != this_class_index,
543 "Illegal constant pool patch to self at %d in class file %s",
544 index, CHECK);
545 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
546 }
547 }
548 }
549
550 if (!_need_verify) {
551 return;
552 }
553
554 // second verification pass - checks the strings are of the right format.
555 // but not yet to the other entries
556 for (index = 1; index < length; index++) {
557 const jbyte tag = cp->tag_at(index).value();
558 switch (tag) {
559 case JVM_CONSTANT_UnresolvedClass: {
560 const Symbol* const class_name = cp->klass_name_at(index);
561 // check the name, even if _cp_patches will overwrite it
562 verify_legal_class_name(class_name, CHECK);
563 break;
564 }
565 case JVM_CONSTANT_NameAndType: {
566 if (_need_verify) {
567 const int sig_index = cp->signature_ref_index_at(index);
568 const int name_index = cp->name_ref_index_at(index);
569 const Symbol* const name = cp->symbol_at(name_index);
570 const Symbol* const sig = cp->symbol_at(sig_index);
571 guarantee_property(sig->utf8_length() != 0,
572 "Illegal zero length constant pool entry at %d in class %s",
573 sig_index, CHECK);
574 guarantee_property(name->utf8_length() != 0,
575 "Illegal zero length constant pool entry at %d in class %s",
576 name_index, CHECK);
577
578 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
579 // Format check Methodref name and signature
580 verify_legal_method_name(name, CHECK);
581 verify_legal_method_signature(name, sig, CHECK);
582 } else {
583 // Format check Fieldref name and signature
584 verify_legal_field_name(name, CHECK);
585 verify_legal_field_signature(name, sig, CHECK);
586 }
587 }
588 break;
589 }
590 case JVM_CONSTANT_InvokeDynamic:
591 case JVM_CONSTANT_Fieldref:
592 case JVM_CONSTANT_Methodref:
593 case JVM_CONSTANT_InterfaceMethodref: {
594 const int name_and_type_ref_index =
595 cp->name_and_type_ref_index_at(index);
596 // already verified to be utf8
597 const int name_ref_index =
598 cp->name_ref_index_at(name_and_type_ref_index);
599 // already verified to be utf8
600 const int signature_ref_index =
601 cp->signature_ref_index_at(name_and_type_ref_index);
602 const Symbol* const name = cp->symbol_at(name_ref_index);
603 const Symbol* const signature = cp->symbol_at(signature_ref_index);
604 if (tag == JVM_CONSTANT_Fieldref) {
605 if (_need_verify) {
606 // Field name and signature are verified above, when iterating NameAndType_info.
607 // Need only to be sure signature is non-zero length and the right type.
608 if (signature->utf8_length() == 0 ||
609 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
610 throwIllegalSignature("Field", name, signature, CHECK);
611 }
612 }
613 } else {
614 if (_need_verify) {
615 // Method name and signature are verified above, when iterating NameAndType_info.
616 // Need only to be sure signature is non-zero length and the right type.
617 if (signature->utf8_length() == 0 ||
618 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
619 throwIllegalSignature("Method", name, signature, CHECK);
620 }
621 }
622 // 4509014: If a class method name begins with '<', it must be "<init>"
623 const unsigned int name_len = name->utf8_length();
624 if (tag == JVM_CONSTANT_Methodref &&
625 name_len != 0 &&
626 name->byte_at(0) == '<' &&
627 name != vmSymbols::object_initializer_name()) {
628 classfile_parse_error(
629 "Bad method name at constant pool index %u in class file %s",
630 name_ref_index, CHECK);
631 }
632 }
633 break;
634 }
635 case JVM_CONSTANT_MethodHandle: {
636 const int ref_index = cp->method_handle_index_at(index);
637 const int ref_kind = cp->method_handle_ref_kind_at(index);
638 switch (ref_kind) {
639 case JVM_REF_invokeVirtual:
640 case JVM_REF_invokeStatic:
641 case JVM_REF_invokeSpecial:
642 case JVM_REF_newInvokeSpecial: {
643 const int name_and_type_ref_index =
644 cp->name_and_type_ref_index_at(ref_index);
645 const int name_ref_index =
646 cp->name_ref_index_at(name_and_type_ref_index);
647 const Symbol* const name = cp->symbol_at(name_ref_index);
648 if (ref_kind == JVM_REF_newInvokeSpecial) {
649 if (name != vmSymbols::object_initializer_name()) {
650 classfile_parse_error(
651 "Bad constructor name at constant pool index %u in class file %s",
652 name_ref_index, CHECK);
653 }
654 } else {
655 if (name == vmSymbols::object_initializer_name()) {
656 classfile_parse_error(
657 "Bad method name at constant pool index %u in class file %s",
658 name_ref_index, CHECK);
659 }
660 }
661 break;
662 }
663 // Other ref_kinds are already fully checked in previous pass.
664 } // switch(ref_kind)
665 break;
666 }
667 case JVM_CONSTANT_MethodType: {
668 const Symbol* const no_name = vmSymbols::type_name(); // place holder
669 const Symbol* const signature = cp->method_type_signature_at(index);
670 verify_legal_method_signature(no_name, signature, CHECK);
671 break;
672 }
673 case JVM_CONSTANT_Utf8: {
674 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
675 }
676 } // switch(tag)
677 } // end of for
678 }
679
680 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
681 int index,
682 Handle patch,
683 TRAPS) {
684 assert(cp != NULL, "invariant");
685
686 BasicType patch_type = T_VOID;
687
688 switch (cp->tag_at(index).value()) {
689
690 case JVM_CONSTANT_UnresolvedClass: {
691 // Patching a class means pre-resolving it.
692 // The name in the constant pool is ignored.
693 if (java_lang_Class::is_instance(patch())) {
694 guarantee_property(!java_lang_Class::is_primitive(patch()),
695 "Illegal class patch at %d in class file %s",
696 index, CHECK);
697 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
698 } else {
699 guarantee_property(java_lang_String::is_instance(patch()),
700 "Illegal class patch at %d in class file %s",
701 index, CHECK);
702 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
703 cp->unresolved_klass_at_put(index, name);
704 }
705 break;
706 }
707
708 case JVM_CONSTANT_String: {
709 // skip this patch and don't clear it. Needs the oop array for resolved
710 // references to be created first.
711 return;
712 }
713 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
714 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
715 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
716 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
717 patch_prim:
718 {
719 jvalue value;
720 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
721 guarantee_property(value_type == patch_type,
722 "Illegal primitive patch at %d in class file %s",
723 index, CHECK);
724 switch (value_type) {
725 case T_INT: cp->int_at_put(index, value.i); break;
726 case T_FLOAT: cp->float_at_put(index, value.f); break;
727 case T_LONG: cp->long_at_put(index, value.j); break;
728 case T_DOUBLE: cp->double_at_put(index, value.d); break;
729 default: assert(false, "");
730 }
731 } // end patch_prim label
732 break;
733
734 default: {
735 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
736 guarantee_property(!has_cp_patch_at(index),
737 "Illegal unexpected patch at %d in class file %s",
738 index, CHECK);
739 return;
740 }
741 } // end of switch(tag)
742
743 // On fall-through, mark the patch as used.
744 clear_cp_patch_at(index);
745 }
746 class NameSigHash: public ResourceObj {
747 public:
748 const Symbol* _name; // name
749 const Symbol* _sig; // signature
750 NameSigHash* _next; // Next entry in hash table
751 };
752
753 static const int HASH_ROW_SIZE = 256;
754
755 static unsigned int hash(const Symbol* name, const Symbol* sig) {
756 unsigned int raw_hash = 0;
757 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
758 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
759
760 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
761 }
762
763
764 static void initialize_hashtable(NameSigHash** table) {
765 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
766 }
767 // Return false if the name/sig combination is found in table.
768 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
769 // The old format checker uses heap sort to find duplicates.
770 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
771 // of table since we don't expect Symbol*'s to move.
772 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
773 assert(name != NULL, "name in constant pool is NULL");
774
775 // First lookup for duplicates
776 int index = hash(name, sig);
777 NameSigHash* entry = table[index];
778 while (entry != NULL) {
779 if (entry->_name == name && entry->_sig == sig) {
780 return false;
781 }
782 entry = entry->_next;
783 }
784
785 // No duplicate is found, allocate a new entry and fill it.
786 entry = new NameSigHash();
787 entry->_name = name;
788 entry->_sig = sig;
789
790 // Insert into hash table
791 entry->_next = table[index];
792 table[index] = entry;
793
794 return true;
795 }
796
797 // Side-effects: populates the _local_interfaces field
798 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
799 const int itfs_len,
800 ConstantPool* const cp,
801 bool* const has_default_methods,
802 TRAPS) {
803 assert(stream != NULL, "invariant");
804 assert(cp != NULL, "invariant");
805 assert(has_default_methods != NULL, "invariant");
806
807 if (itfs_len == 0) {
808 _local_interfaces = Universe::the_empty_klass_array();
809 } else {
810 assert(itfs_len > 0, "only called for len>0");
811 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
812
813 int index;
814 for (index = 0; index < itfs_len; index++) {
815 const u2 interface_index = stream->get_u2(CHECK);
816 KlassHandle interf;
817 check_property(
818 valid_klass_reference_at(interface_index),
819 "Interface name has bad constant pool index %u in class file %s",
820 interface_index, CHECK);
821 if (cp->tag_at(interface_index).is_klass()) {
822 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
823 } else {
824 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
825
826 // Don't need to check legal name because it's checked when parsing constant pool.
827 // But need to make sure it's not an array type.
828 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
829 "Bad interface name in class file %s", CHECK);
830
831 // Call resolve_super so classcircularity is checked
832 const Klass* const k =
833 SystemDictionary::resolve_super_or_fail(_class_name,
834 unresolved_klass,
835 _loader_data->class_loader(),
836 _protection_domain,
837 false,
838 CHECK);
839 interf = KlassHandle(THREAD, k);
840 }
841
842 if (!interf()->is_interface()) {
843 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
844 "Implementing class");
845 }
846
847 if (InstanceKlass::cast(interf())->has_default_methods()) {
848 *has_default_methods = true;
849 }
850 _local_interfaces->at_put(index, interf());
851 }
852
853 if (!_need_verify || itfs_len <= 1) {
854 return;
855 }
856
857 // Check if there's any duplicates in interfaces
858 ResourceMark rm(THREAD);
859 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
860 NameSigHash*,
861 HASH_ROW_SIZE);
862 initialize_hashtable(interface_names);
863 bool dup = false;
864 {
865 debug_only(NoSafepointVerifier nsv;)
866 for (index = 0; index < itfs_len; index++) {
867 const Klass* const k = _local_interfaces->at(index);
868 const Symbol* const name = InstanceKlass::cast(k)->name();
869 // If no duplicates, add (name, NULL) in hashtable interface_names.
870 if (!put_after_lookup(name, NULL, interface_names)) {
871 dup = true;
872 break;
873 }
874 }
875 }
876 if (dup) {
877 classfile_parse_error("Duplicate interface name in class file %s", CHECK);
878 }
879 }
880 }
881
882 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
883 int constantvalue_index,
884 int signature_index,
885 TRAPS) const {
886 // Make sure the constant pool entry is of a type appropriate to this field
887 guarantee_property(
888 (constantvalue_index > 0 &&
889 constantvalue_index < cp->length()),
890 "Bad initial value index %u in ConstantValue attribute in class file %s",
891 constantvalue_index, CHECK);
892
893 const constantTag value_type = cp->tag_at(constantvalue_index);
894 switch(cp->basic_type_for_signature_at(signature_index)) {
895 case T_LONG: {
896 guarantee_property(value_type.is_long(),
897 "Inconsistent constant value type in class file %s",
898 CHECK);
899 break;
900 }
901 case T_FLOAT: {
902 guarantee_property(value_type.is_float(),
903 "Inconsistent constant value type in class file %s",
904 CHECK);
905 break;
906 }
907 case T_DOUBLE: {
908 guarantee_property(value_type.is_double(),
909 "Inconsistent constant value type in class file %s",
910 CHECK);
911 break;
912 }
913 case T_BYTE:
914 case T_CHAR:
915 case T_SHORT:
916 case T_BOOLEAN:
917 case T_INT: {
918 guarantee_property(value_type.is_int(),
919 "Inconsistent constant value type in class file %s",
920 CHECK);
921 break;
922 }
923 case T_OBJECT: {
924 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
925 && value_type.is_string()),
926 "Bad string initial value in class file %s",
927 CHECK);
928 break;
929 }
930 default: {
931 classfile_parse_error("Unable to set initial value %u in class file %s",
932 constantvalue_index,
933 CHECK);
934 }
935 }
936 }
937
938 class AnnotationCollector : public ResourceObj{
939 public:
940 enum Location { _in_field, _in_method, _in_class };
941 enum ID {
942 _unknown = 0,
943 _method_CallerSensitive,
944 _method_ForceInline,
945 _method_DontInline,
946 _method_InjectedProfile,
947 _method_LambdaForm_Compiled,
948 _method_LambdaForm_Hidden,
949 _method_HotSpotIntrinsicCandidate,
950 _jdk_internal_vm_annotation_Contended,
951 _field_Stable,
952 _jdk_internal_vm_annotation_ReservedStackAccess,
953 _annotation_LIMIT
954 };
955 const Location _location;
956 int _annotations_present;
957 u2 _contended_group;
958
959 AnnotationCollector(Location location)
960 : _location(location), _annotations_present(0)
961 {
962 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
963 }
964 // If this annotation name has an ID, report it (or _none).
965 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
966 // Set the annotation name:
967 void set_annotation(ID id) {
968 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
969 _annotations_present |= nth_bit((int)id);
970 }
971
972 void remove_annotation(ID id) {
973 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
974 _annotations_present &= ~nth_bit((int)id);
975 }
976
977 // Report if the annotation is present.
978 bool has_any_annotations() const { return _annotations_present != 0; }
979 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
980
981 void set_contended_group(u2 group) { _contended_group = group; }
982 u2 contended_group() const { return _contended_group; }
983
984 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
985
986 void set_stable(bool stable) { set_annotation(_field_Stable); }
987 bool is_stable() const { return has_annotation(_field_Stable); }
988 };
989
990 // This class also doubles as a holder for metadata cleanup.
991 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
992 private:
993 ClassLoaderData* _loader_data;
994 AnnotationArray* _field_annotations;
995 AnnotationArray* _field_type_annotations;
996 public:
997 FieldAnnotationCollector(ClassLoaderData* loader_data) :
998 AnnotationCollector(_in_field),
999 _loader_data(loader_data),
1000 _field_annotations(NULL),
1001 _field_type_annotations(NULL) {}
1002 ~FieldAnnotationCollector();
1003 void apply_to(FieldInfo* f);
1004 AnnotationArray* field_annotations() { return _field_annotations; }
1005 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1006
1007 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1008 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1009 };
1010
1011 class MethodAnnotationCollector : public AnnotationCollector{
1012 public:
1013 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1014 void apply_to(methodHandle m);
1015 };
1016
1017 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1018 public:
1019 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1020 void apply_to(InstanceKlass* ik);
1021 };
1022
1023
1024 static int skip_annotation_value(const u1*, int, int); // fwd decl
1025
1026 // Skip an annotation. Return >=limit if there is any problem.
1027 static int skip_annotation(const u1* buffer, int limit, int index) {
1028 assert(buffer != NULL, "invariant");
1029 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1030 // value := switch (tag:u1) { ... }
1031 index += 2; // skip atype
1032 if ((index += 2) >= limit) return limit; // read nmem
1033 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1034 while (--nmem >= 0 && index < limit) {
1035 index += 2; // skip member
1036 index = skip_annotation_value(buffer, limit, index);
1037 }
1038 return index;
1039 }
1040
1041 // Skip an annotation value. Return >=limit if there is any problem.
1042 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1043 assert(buffer != NULL, "invariant");
1044
1045 // value := switch (tag:u1) {
1046 // case B, C, I, S, Z, D, F, J, c: con:u2;
1047 // case e: e_class:u2 e_name:u2;
1048 // case s: s_con:u2;
1049 // case [: do(nval:u2) {value};
1050 // case @: annotation;
1051 // case s: s_con:u2;
1052 // }
1053 if ((index += 1) >= limit) return limit; // read tag
1054 const u1 tag = buffer[index - 1];
1055 switch (tag) {
1056 case 'B':
1057 case 'C':
1058 case 'I':
1059 case 'S':
1060 case 'Z':
1061 case 'D':
1062 case 'F':
1063 case 'J':
1064 case 'c':
1065 case 's':
1066 index += 2; // skip con or s_con
1067 break;
1068 case 'e':
1069 index += 4; // skip e_class, e_name
1070 break;
1071 case '[':
1072 {
1073 if ((index += 2) >= limit) return limit; // read nval
1074 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1075 while (--nval >= 0 && index < limit) {
1076 index = skip_annotation_value(buffer, limit, index);
1077 }
1078 }
1079 break;
1080 case '@':
1081 index = skip_annotation(buffer, limit, index);
1082 break;
1083 default:
1084 return limit; // bad tag byte
1085 }
1086 return index;
1087 }
1088
1089 // Sift through annotations, looking for those significant to the VM:
1090 static void parse_annotations(const ConstantPool* const cp,
1091 const u1* buffer, int limit,
1092 AnnotationCollector* coll,
1093 ClassLoaderData* loader_data,
1094 TRAPS) {
1095
1096 assert(cp != NULL, "invariant");
1097 assert(buffer != NULL, "invariant");
1098 assert(coll != NULL, "invariant");
1099 assert(loader_data != NULL, "invariant");
1100
1101 // annotations := do(nann:u2) {annotation}
1102 int index = 0;
1103 if ((index += 2) >= limit) return; // read nann
1104 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1105 enum { // initial annotation layout
1106 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1107 count_off = 2, // u2 such as 1 (one value)
1108 member_off = 4, // utf8 such as 'value'
1109 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1110 e_tag_val = 'e',
1111 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1112 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1113 e_size = 11, // end of 'e' annotation
1114 c_tag_val = 'c', // payload is type
1115 c_con_off = 7, // utf8 payload, such as 'I'
1116 c_size = 9, // end of 'c' annotation
1117 s_tag_val = 's', // payload is String
1118 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1119 s_size = 9,
1120 min_size = 6 // smallest possible size (zero members)
1121 };
1122 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) {
1123 int index0 = index;
1124 index = skip_annotation(buffer, limit, index);
1125 const u1* const abase = buffer + index0;
1126 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1127 const int count = Bytes::get_Java_u2((address)abase + count_off);
1128 const Symbol* const aname = check_symbol_at(cp, atype);
1129 if (aname == NULL) break; // invalid annotation name
1130 const Symbol* member = NULL;
1131 if (count >= 1) {
1132 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1133 member = check_symbol_at(cp, member_index);
1134 if (member == NULL) break; // invalid member name
1135 }
1136
1137 // Here is where parsing particular annotations will take place.
1138 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1139 if (AnnotationCollector::_unknown == id) continue;
1140 coll->set_annotation(id);
1141
1142 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1143 // @Contended can optionally specify the contention group.
1144 //
1145 // Contended group defines the equivalence class over the fields:
1146 // the fields within the same contended group are not treated distinct.
1147 // The only exception is default group, which does not incur the
1148 // equivalence. Naturally, contention group for classes is meaningless.
1149 //
1150 // While the contention group is specified as String, annotation
1151 // values are already interned, and we might as well use the constant
1152 // pool index as the group tag.
1153 //
1154 u2 group_index = 0; // default contended group
1155 if (count == 1
1156 && s_size == (index - index0) // match size
1157 && s_tag_val == *(abase + tag_off)
1158 && member == vmSymbols::value_name()) {
1159 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1160 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1161 group_index = 0; // default contended group
1162 }
1163 }
1164 coll->set_contended_group(group_index);
1165 }
1166 }
1167 }
1168
1169
1170 // Parse attributes for a field.
1171 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1172 u2 attributes_count,
1173 bool is_static, u2 signature_index,
1174 u2* const constantvalue_index_addr,
1175 bool* const is_synthetic_addr,
1176 u2* const generic_signature_index_addr,
1177 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1178 TRAPS) {
1179 assert(cfs != NULL, "invariant");
1180 assert(constantvalue_index_addr != NULL, "invariant");
1181 assert(is_synthetic_addr != NULL, "invariant");
1182 assert(generic_signature_index_addr != NULL, "invariant");
1183 assert(parsed_annotations != NULL, "invariant");
1184 assert(attributes_count > 0, "attributes_count should be greater than 0");
1185
1186 u2 constantvalue_index = 0;
1187 u2 generic_signature_index = 0;
1188 bool is_synthetic = false;
1189 const u1* runtime_visible_annotations = NULL;
1190 int runtime_visible_annotations_length = 0;
1191 const u1* runtime_invisible_annotations = NULL;
1192 int runtime_invisible_annotations_length = 0;
1193 const u1* runtime_visible_type_annotations = NULL;
1194 int runtime_visible_type_annotations_length = 0;
1195 const u1* runtime_invisible_type_annotations = NULL;
1196 int runtime_invisible_type_annotations_length = 0;
1197 bool runtime_invisible_annotations_exists = false;
1198 bool runtime_invisible_type_annotations_exists = false;
1199 const ConstantPool* const cp = _cp;
1200
1201 while (attributes_count--) {
1202 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1203 const u2 attribute_name_index = cfs->get_u2_fast();
1204 const u4 attribute_length = cfs->get_u4_fast();
1205 check_property(valid_symbol_at(attribute_name_index),
1206 "Invalid field attribute index %u in class file %s",
1207 attribute_name_index,
1208 CHECK);
1209
1210 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1211 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1212 // ignore if non-static
1213 if (constantvalue_index != 0) {
1214 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1215 }
1216 check_property(
1217 attribute_length == 2,
1218 "Invalid ConstantValue field attribute length %u in class file %s",
1219 attribute_length, CHECK);
1220
1221 constantvalue_index = cfs->get_u2(CHECK);
1222 if (_need_verify) {
1223 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1224 }
1225 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1226 if (attribute_length != 0) {
1227 classfile_parse_error(
1228 "Invalid Synthetic field attribute length %u in class file %s",
1229 attribute_length, CHECK);
1230 }
1231 is_synthetic = true;
1232 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1233 if (attribute_length != 0) {
1234 classfile_parse_error(
1235 "Invalid Deprecated field attribute length %u in class file %s",
1236 attribute_length, CHECK);
1237 }
1238 } else if (_major_version >= JAVA_1_5_VERSION) {
1239 if (attribute_name == vmSymbols::tag_signature()) {
1240 if (attribute_length != 2) {
1241 classfile_parse_error(
1242 "Wrong size %u for field's Signature attribute in class file %s",
1243 attribute_length, CHECK);
1244 }
1245 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1246 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1247 if (runtime_visible_annotations != NULL) {
1248 classfile_parse_error(
1249 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1250 }
1251 runtime_visible_annotations_length = attribute_length;
1252 runtime_visible_annotations = cfs->get_u1_buffer();
1253 assert(runtime_visible_annotations != NULL, "null visible annotations");
1254 parse_annotations(cp,
1255 runtime_visible_annotations,
1256 runtime_visible_annotations_length,
1257 parsed_annotations,
1258 _loader_data,
1259 CHECK);
1260 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1261 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1262 if (runtime_invisible_annotations_exists) {
1263 classfile_parse_error(
1264 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1265 }
1266 runtime_invisible_annotations_exists = true;
1267 if (PreserveAllAnnotations) {
1268 runtime_invisible_annotations_length = attribute_length;
1269 runtime_invisible_annotations = cfs->get_u1_buffer();
1270 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1271 }
1272 cfs->skip_u1(attribute_length, CHECK);
1273 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1274 if (runtime_visible_type_annotations != NULL) {
1275 classfile_parse_error(
1276 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1277 }
1278 runtime_visible_type_annotations_length = attribute_length;
1279 runtime_visible_type_annotations = cfs->get_u1_buffer();
1280 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1281 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1282 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1283 if (runtime_invisible_type_annotations_exists) {
1284 classfile_parse_error(
1285 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1286 } else {
1287 runtime_invisible_type_annotations_exists = true;
1288 }
1289 if (PreserveAllAnnotations) {
1290 runtime_invisible_type_annotations_length = attribute_length;
1291 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1292 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1293 }
1294 cfs->skip_u1(attribute_length, CHECK);
1295 } else {
1296 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1297 }
1298 } else {
1299 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1300 }
1301 }
1302
1303 *constantvalue_index_addr = constantvalue_index;
1304 *is_synthetic_addr = is_synthetic;
1305 *generic_signature_index_addr = generic_signature_index;
1306 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1307 runtime_visible_annotations_length,
1308 runtime_invisible_annotations,
1309 runtime_invisible_annotations_length,
1310 CHECK);
1311 parsed_annotations->set_field_annotations(a);
1312 a = assemble_annotations(runtime_visible_type_annotations,
1313 runtime_visible_type_annotations_length,
1314 runtime_invisible_type_annotations,
1315 runtime_invisible_type_annotations_length,
1316 CHECK);
1317 parsed_annotations->set_field_type_annotations(a);
1318 return;
1319 }
1320
1321
1322 // Field allocation types. Used for computing field offsets.
1323
1324 enum FieldAllocationType {
1325 STATIC_OOP, // Oops
1326 STATIC_BYTE, // Boolean, Byte, char
1327 STATIC_SHORT, // shorts
1328 STATIC_WORD, // ints
1329 STATIC_DOUBLE, // aligned long or double
1330 NONSTATIC_OOP,
1331 NONSTATIC_BYTE,
1332 NONSTATIC_SHORT,
1333 NONSTATIC_WORD,
1334 NONSTATIC_DOUBLE,
1335 MAX_FIELD_ALLOCATION_TYPE,
1336 BAD_ALLOCATION_TYPE = -1
1337 };
1338
1339 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1340 BAD_ALLOCATION_TYPE, // 0
1341 BAD_ALLOCATION_TYPE, // 1
1342 BAD_ALLOCATION_TYPE, // 2
1343 BAD_ALLOCATION_TYPE, // 3
1344 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1345 NONSTATIC_SHORT, // T_CHAR = 5,
1346 NONSTATIC_WORD, // T_FLOAT = 6,
1347 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1348 NONSTATIC_BYTE, // T_BYTE = 8,
1349 NONSTATIC_SHORT, // T_SHORT = 9,
1350 NONSTATIC_WORD, // T_INT = 10,
1351 NONSTATIC_DOUBLE, // T_LONG = 11,
1352 NONSTATIC_OOP, // T_OBJECT = 12,
1353 NONSTATIC_OOP, // T_ARRAY = 13,
1354 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1355 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1356 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1357 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1358 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1359 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1360 BAD_ALLOCATION_TYPE, // 0
1361 BAD_ALLOCATION_TYPE, // 1
1362 BAD_ALLOCATION_TYPE, // 2
1363 BAD_ALLOCATION_TYPE, // 3
1364 STATIC_BYTE , // T_BOOLEAN = 4,
1365 STATIC_SHORT, // T_CHAR = 5,
1366 STATIC_WORD, // T_FLOAT = 6,
1367 STATIC_DOUBLE, // T_DOUBLE = 7,
1368 STATIC_BYTE, // T_BYTE = 8,
1369 STATIC_SHORT, // T_SHORT = 9,
1370 STATIC_WORD, // T_INT = 10,
1371 STATIC_DOUBLE, // T_LONG = 11,
1372 STATIC_OOP, // T_OBJECT = 12,
1373 STATIC_OOP, // T_ARRAY = 13,
1374 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1375 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1376 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1377 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1378 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1379 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1380 };
1381
1382 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1383 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1384 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1385 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1386 return result;
1387 }
1388
1389 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1390 public:
1391 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1392
1393 FieldAllocationCount() {
1394 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1395 count[i] = 0;
1396 }
1397 }
1398
1399 FieldAllocationType update(bool is_static, BasicType type) {
1400 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1401 if (atype != BAD_ALLOCATION_TYPE) {
1402 // Make sure there is no overflow with injected fields.
1403 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1404 count[atype]++;
1405 }
1406 return atype;
1407 }
1408 };
1409
1410 // Side-effects: populates the _fields, _fields_annotations,
1411 // _fields_type_annotations fields
1412 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1413 bool is_interface,
1414 FieldAllocationCount* const fac,
1415 ConstantPool* cp,
1416 const int cp_size,
1417 u2* const java_fields_count_ptr,
1418 TRAPS) {
1419
1420 assert(cfs != NULL, "invariant");
1421 assert(fac != NULL, "invariant");
1422 assert(cp != NULL, "invariant");
1423 assert(java_fields_count_ptr != NULL, "invariant");
1424
1425 assert(NULL == _fields, "invariant");
1426 assert(NULL == _fields_annotations, "invariant");
1427 assert(NULL == _fields_type_annotations, "invariant");
1428
1429 cfs->guarantee_more(2, CHECK); // length
1430 const u2 length = cfs->get_u2_fast();
1431 *java_fields_count_ptr = length;
1432
1433 int num_injected = 0;
1434 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1435 &num_injected);
1436 const int total_fields = length + num_injected;
1437
1438 // The field array starts with tuples of shorts
1439 // [access, name index, sig index, initial value index, byte offset].
1440 // A generic signature slot only exists for field with generic
1441 // signature attribute. And the access flag is set with
1442 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1443 // signature slots are at the end of the field array and after all
1444 // other fields data.
1445 //
1446 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1447 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1448 // ...
1449 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1450 // [generic signature index]
1451 // [generic signature index]
1452 // ...
1453 //
1454 // Allocate a temporary resource array for field data. For each field,
1455 // a slot is reserved in the temporary array for the generic signature
1456 // index. After parsing all fields, the data are copied to a permanent
1457 // array and any unused slots will be discarded.
1458 ResourceMark rm(THREAD);
1459 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1460 u2,
1461 total_fields * (FieldInfo::field_slots + 1));
1462
1463 // The generic signature slots start after all other fields' data.
1464 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1465 int num_generic_signature = 0;
1466 for (int n = 0; n < length; n++) {
1467 // access_flags, name_index, descriptor_index, attributes_count
1468 cfs->guarantee_more(8, CHECK);
1469
1470 AccessFlags access_flags;
1471 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1472 verify_legal_field_modifiers(flags, is_interface, CHECK);
1473 access_flags.set_flags(flags);
1474
1475 const u2 name_index = cfs->get_u2_fast();
1476 check_property(valid_symbol_at(name_index),
1477 "Invalid constant pool index %u for field name in class file %s",
1478 name_index, CHECK);
1479 const Symbol* const name = cp->symbol_at(name_index);
1480 verify_legal_field_name(name, CHECK);
1481
1482 const u2 signature_index = cfs->get_u2_fast();
1483 check_property(valid_symbol_at(signature_index),
1484 "Invalid constant pool index %u for field signature in class file %s",
1485 signature_index, CHECK);
1486 const Symbol* const sig = cp->symbol_at(signature_index);
1487 verify_legal_field_signature(name, sig, CHECK);
1488
1489 u2 constantvalue_index = 0;
1490 bool is_synthetic = false;
1491 u2 generic_signature_index = 0;
1492 const bool is_static = access_flags.is_static();
1493 FieldAnnotationCollector parsed_annotations(_loader_data);
1494
1495 const u2 attributes_count = cfs->get_u2_fast();
1496 if (attributes_count > 0) {
1497 parse_field_attributes(cfs,
1498 attributes_count,
1499 is_static,
1500 signature_index,
1501 &constantvalue_index,
1502 &is_synthetic,
1503 &generic_signature_index,
1504 &parsed_annotations,
1505 CHECK);
1506
1507 if (parsed_annotations.field_annotations() != NULL) {
1508 if (_fields_annotations == NULL) {
1509 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1510 _loader_data, length, NULL,
1511 CHECK);
1512 }
1513 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1514 parsed_annotations.set_field_annotations(NULL);
1515 }
1516 if (parsed_annotations.field_type_annotations() != NULL) {
1517 if (_fields_type_annotations == NULL) {
1518 _fields_type_annotations =
1519 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1520 length,
1521 NULL,
1522 CHECK);
1523 }
1524 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1525 parsed_annotations.set_field_type_annotations(NULL);
1526 }
1527
1528 if (is_synthetic) {
1529 access_flags.set_is_synthetic();
1530 }
1531 if (generic_signature_index != 0) {
1532 access_flags.set_field_has_generic_signature();
1533 fa[generic_signature_slot] = generic_signature_index;
1534 generic_signature_slot ++;
1535 num_generic_signature ++;
1536 }
1537 }
1538
1539 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1540 field->initialize(access_flags.as_short(),
1541 name_index,
1542 signature_index,
1543 constantvalue_index);
1544 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1545
1546 // Remember how many oops we encountered and compute allocation type
1547 const FieldAllocationType atype = fac->update(is_static, type);
1548 field->set_allocation_type(atype);
1549
1550 // After field is initialized with type, we can augment it with aux info
1551 if (parsed_annotations.has_any_annotations())
1552 parsed_annotations.apply_to(field);
1553 }
1554
1555 int index = length;
1556 if (num_injected != 0) {
1557 for (int n = 0; n < num_injected; n++) {
1558 // Check for duplicates
1559 if (injected[n].may_be_java) {
1560 const Symbol* const name = injected[n].name();
1561 const Symbol* const signature = injected[n].signature();
1562 bool duplicate = false;
1563 for (int i = 0; i < length; i++) {
1564 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1565 if (name == cp->symbol_at(f->name_index()) &&
1566 signature == cp->symbol_at(f->signature_index())) {
1567 // Symbol is desclared in Java so skip this one
1568 duplicate = true;
1569 break;
1570 }
1571 }
1572 if (duplicate) {
1573 // These will be removed from the field array at the end
1574 continue;
1575 }
1576 }
1577
1578 // Injected field
1579 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1580 field->initialize(JVM_ACC_FIELD_INTERNAL,
1581 injected[n].name_index,
1582 injected[n].signature_index,
1583 0);
1584
1585 const BasicType type = FieldType::basic_type(injected[n].signature());
1586
1587 // Remember how many oops we encountered and compute allocation type
1588 const FieldAllocationType atype = fac->update(false, type);
1589 field->set_allocation_type(atype);
1590 index++;
1591 }
1592 }
1593
1594 assert(NULL == _fields, "invariant");
1595
1596 _fields =
1597 MetadataFactory::new_array<u2>(_loader_data,
1598 index * FieldInfo::field_slots + num_generic_signature,
1599 CHECK);
1600 // Sometimes injected fields already exist in the Java source so
1601 // the fields array could be too long. In that case the
1602 // fields array is trimed. Also unused slots that were reserved
1603 // for generic signature indexes are discarded.
1604 {
1605 int i = 0;
1606 for (; i < index * FieldInfo::field_slots; i++) {
1607 _fields->at_put(i, fa[i]);
1608 }
1609 for (int j = total_fields * FieldInfo::field_slots;
1610 j < generic_signature_slot; j++) {
1611 _fields->at_put(i++, fa[j]);
1612 }
1613 assert(_fields->length() == i, "");
1614 }
1615
1616 if (_need_verify && length > 1) {
1617 // Check duplicated fields
1618 ResourceMark rm(THREAD);
1619 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1620 THREAD, NameSigHash*, HASH_ROW_SIZE);
1621 initialize_hashtable(names_and_sigs);
1622 bool dup = false;
1623 {
1624 debug_only(NoSafepointVerifier nsv;)
1625 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1626 const Symbol* const name = fs.name();
1627 const Symbol* const sig = fs.signature();
1628 // If no duplicates, add name/signature in hashtable names_and_sigs.
1629 if (!put_after_lookup(name, sig, names_and_sigs)) {
1630 dup = true;
1631 break;
1632 }
1633 }
1634 }
1635 if (dup) {
1636 classfile_parse_error("Duplicate field name&signature in class file %s",
1637 CHECK);
1638 }
1639 }
1640 }
1641
1642
1643 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1644 while (length-- > 0) {
1645 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1646 }
1647 }
1648
1649 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1650 u4 code_length,
1651 u4 exception_table_length,
1652 TRAPS) {
1653 assert(cfs != NULL, "invariant");
1654
1655 const u2* const exception_table_start = cfs->get_u2_buffer();
1656 assert(exception_table_start != NULL, "null exception table");
1657
1658 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1659 // end_pc,
1660 // handler_pc,
1661 // catch_type_index
1662
1663 // Will check legal target after parsing code array in verifier.
1664 if (_need_verify) {
1665 for (unsigned int i = 0; i < exception_table_length; i++) {
1666 const u2 start_pc = cfs->get_u2_fast();
1667 const u2 end_pc = cfs->get_u2_fast();
1668 const u2 handler_pc = cfs->get_u2_fast();
1669 const u2 catch_type_index = cfs->get_u2_fast();
1670 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1671 "Illegal exception table range in class file %s",
1672 CHECK_NULL);
1673 guarantee_property(handler_pc < code_length,
1674 "Illegal exception table handler in class file %s",
1675 CHECK_NULL);
1676 if (catch_type_index != 0) {
1677 guarantee_property(valid_klass_reference_at(catch_type_index),
1678 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1679 }
1680 }
1681 } else {
1682 cfs->skip_u2_fast(exception_table_length * 4);
1683 }
1684 return exception_table_start;
1685 }
1686
1687 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1688 u4 code_length,
1689 CompressedLineNumberWriteStream**const write_stream,
1690 TRAPS) {
1691
1692 const ClassFileStream* const cfs = _stream;
1693 unsigned int num_entries = cfs->get_u2(CHECK);
1694
1695 // Each entry is a u2 start_pc, and a u2 line_number
1696 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1697
1698 // Verify line number attribute and table length
1699 check_property(
1700 code_attribute_length == sizeof(u2) + length_in_bytes,
1701 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1702
1703 cfs->guarantee_more(length_in_bytes, CHECK);
1704
1705 if ((*write_stream) == NULL) {
1706 if (length_in_bytes > fixed_buffer_size) {
1707 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1708 } else {
1709 (*write_stream) = new CompressedLineNumberWriteStream(
1710 _linenumbertable_buffer, fixed_buffer_size);
1711 }
1712 }
1713
1714 while (num_entries-- > 0) {
1715 const u2 bci = cfs->get_u2_fast(); // start_pc
1716 const u2 line = cfs->get_u2_fast(); // line_number
1717 guarantee_property(bci < code_length,
1718 "Invalid pc in LineNumberTable in class file %s", CHECK);
1719 (*write_stream)->write_pair(bci, line);
1720 }
1721 }
1722
1723
1724 class LVT_Hash : public AllStatic {
1725 public:
1726
1727 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1728 /*
1729 * 3-tuple start_bci/length/slot has to be unique key,
1730 * so the following comparison seems to be redundant:
1731 * && elem->name_cp_index == entry->_elem->name_cp_index
1732 */
1733 return (e0.start_bci == e1.start_bci &&
1734 e0.length == e1.length &&
1735 e0.name_cp_index == e1.name_cp_index &&
1736 e0.slot == e1.slot);
1737 }
1738
1739 static unsigned int hash(LocalVariableTableElement const& e0) {
1740 unsigned int raw_hash = e0.start_bci;
1741
1742 raw_hash = e0.length + raw_hash * 37;
1743 raw_hash = e0.name_cp_index + raw_hash * 37;
1744 raw_hash = e0.slot + raw_hash * 37;
1745
1746 return raw_hash;
1747 }
1748 };
1749
1750
1751 // Class file LocalVariableTable elements.
1752 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1753 public:
1754 u2 start_bci;
1755 u2 length;
1756 u2 name_cp_index;
1757 u2 descriptor_cp_index;
1758 u2 slot;
1759 };
1760
1761 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1762 LocalVariableTableElement* const lvt) {
1763 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1764 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1765 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1766 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1767 lvt->signature_cp_index = 0;
1768 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1769 }
1770
1771 // Function is used to parse both attributes:
1772 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1773 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1774 u4 code_length,
1775 u2 max_locals,
1776 u4 code_attribute_length,
1777 u2* const localvariable_table_length,
1778 bool isLVTT,
1779 TRAPS) {
1780 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1781 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1782 const unsigned int size =
1783 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1784
1785 const ConstantPool* const cp = _cp;
1786
1787 // Verify local variable table attribute has right length
1788 if (_need_verify) {
1789 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1790 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1791 }
1792
1793 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1794 assert(localvariable_table_start != NULL, "null local variable table");
1795 if (!_need_verify) {
1796 cfs->skip_u2_fast(size);
1797 } else {
1798 cfs->guarantee_more(size * 2, CHECK_NULL);
1799 for(int i = 0; i < (*localvariable_table_length); i++) {
1800 const u2 start_pc = cfs->get_u2_fast();
1801 const u2 length = cfs->get_u2_fast();
1802 const u2 name_index = cfs->get_u2_fast();
1803 const u2 descriptor_index = cfs->get_u2_fast();
1804 const u2 index = cfs->get_u2_fast();
1805 // Assign to a u4 to avoid overflow
1806 const u4 end_pc = (u4)start_pc + (u4)length;
1807
1808 if (start_pc >= code_length) {
1809 classfile_parse_error(
1810 "Invalid start_pc %u in %s in class file %s",
1811 start_pc, tbl_name, CHECK_NULL);
1812 }
1813 if (end_pc > code_length) {
1814 classfile_parse_error(
1815 "Invalid length %u in %s in class file %s",
1816 length, tbl_name, CHECK_NULL);
1817 }
1818 const int cp_size = cp->length();
1819 guarantee_property(valid_symbol_at(name_index),
1820 "Name index %u in %s has bad constant type in class file %s",
1821 name_index, tbl_name, CHECK_NULL);
1822 guarantee_property(valid_symbol_at(descriptor_index),
1823 "Signature index %u in %s has bad constant type in class file %s",
1824 descriptor_index, tbl_name, CHECK_NULL);
1825
1826 const Symbol* const name = cp->symbol_at(name_index);
1827 const Symbol* const sig = cp->symbol_at(descriptor_index);
1828 verify_legal_field_name(name, CHECK_NULL);
1829 u2 extra_slot = 0;
1830 if (!isLVTT) {
1831 verify_legal_field_signature(name, sig, CHECK_NULL);
1832
1833 // 4894874: check special cases for double and long local variables
1834 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1835 sig == vmSymbols::type_signature(T_LONG)) {
1836 extra_slot = 1;
1837 }
1838 }
1839 guarantee_property((index + extra_slot) < max_locals,
1840 "Invalid index %u in %s in class file %s",
1841 index, tbl_name, CHECK_NULL);
1842 }
1843 }
1844 return localvariable_table_start;
1845 }
1846
1847
1848 void ClassFileParser::parse_type_array(u2 array_length,
1849 u4 code_length,
1850 u4* const u1_index,
1851 u4* const u2_index,
1852 u1* const u1_array,
1853 u2* const u2_array,
1854 TRAPS) {
1855 const ClassFileStream* const cfs = _stream;
1856 u2 index = 0; // index in the array with long/double occupying two slots
1857 u4 i1 = *u1_index;
1858 u4 i2 = *u2_index + 1;
1859 for(int i = 0; i < array_length; i++) {
1860 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1861 index++;
1862 if (tag == ITEM_Long || tag == ITEM_Double) {
1863 index++;
1864 } else if (tag == ITEM_Object) {
1865 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1866 guarantee_property(valid_klass_reference_at(class_index),
1867 "Bad class index %u in StackMap in class file %s",
1868 class_index, CHECK);
1869 } else if (tag == ITEM_Uninitialized) {
1870 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1871 guarantee_property(
1872 offset < code_length,
1873 "Bad uninitialized type offset %u in StackMap in class file %s",
1874 offset, CHECK);
1875 } else {
1876 guarantee_property(
1877 tag <= (u1)ITEM_Uninitialized,
1878 "Unknown variable type %u in StackMap in class file %s",
1879 tag, CHECK);
1880 }
1881 }
1882 u2_array[*u2_index] = index;
1883 *u1_index = i1;
1884 *u2_index = i2;
1885 }
1886
1887 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1888 u4 code_attribute_length,
1889 bool need_verify,
1890 TRAPS) {
1891 assert(cfs != NULL, "invariant");
1892
1893 if (0 == code_attribute_length) {
1894 return NULL;
1895 }
1896
1897 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1898 assert(stackmap_table_start != NULL, "null stackmap table");
1899
1900 // check code_attribute_length first
1901 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1902
1903 if (!need_verify && !DumpSharedSpaces) {
1904 return NULL;
1905 }
1906 return stackmap_table_start;
1907 }
1908
1909 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1910 u2* const checked_exceptions_length,
1911 u4 method_attribute_length,
1912 TRAPS) {
1913 assert(cfs != NULL, "invariant");
1914 assert(checked_exceptions_length != NULL, "invariant");
1915
1916 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1917 *checked_exceptions_length = cfs->get_u2_fast();
1918 const unsigned int size =
1919 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1920 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1921 assert(checked_exceptions_start != NULL, "null checked exceptions");
1922 if (!_need_verify) {
1923 cfs->skip_u2_fast(size);
1924 } else {
1925 // Verify each value in the checked exception table
1926 u2 checked_exception;
1927 const u2 len = *checked_exceptions_length;
1928 cfs->guarantee_more(2 * len, CHECK_NULL);
1929 for (int i = 0; i < len; i++) {
1930 checked_exception = cfs->get_u2_fast();
1931 check_property(
1932 valid_klass_reference_at(checked_exception),
1933 "Exception name has bad type at constant pool %u in class file %s",
1934 checked_exception, CHECK_NULL);
1935 }
1936 }
1937 // check exceptions attribute length
1938 if (_need_verify) {
1939 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1940 sizeof(u2) * size),
1941 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1942 }
1943 return checked_exceptions_start;
1944 }
1945
1946 void ClassFileParser::throwIllegalSignature(const char* type,
1947 const Symbol* name,
1948 const Symbol* sig,
1949 TRAPS) const {
1950 assert(name != NULL, "invariant");
1951 assert(sig != NULL, "invariant");
1952
1953 ResourceMark rm(THREAD);
1954 Exceptions::fthrow(THREAD_AND_LOCATION,
1955 vmSymbols::java_lang_ClassFormatError(),
1956 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1957 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1958 }
1959
1960 AnnotationCollector::ID
1961 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1962 const Symbol* name) {
1963 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1964 // Privileged code can use all annotations. Other code silently drops some.
1965 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1966 loader_data->is_platform_class_loader_data() ||
1967 loader_data->is_anonymous();
1968 switch (sid) {
1969 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1970 if (_location != _in_method) break; // only allow for methods
1971 if (!privileged) break; // only allow in privileged code
1972 return _method_CallerSensitive;
1973 }
1974 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1975 if (_location != _in_method) break; // only allow for methods
1976 if (!privileged) break; // only allow in privileged code
1977 return _method_ForceInline;
1978 }
1979 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1980 if (_location != _in_method) break; // only allow for methods
1981 if (!privileged) break; // only allow in privileged code
1982 return _method_DontInline;
1983 }
1984 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1985 if (_location != _in_method) break; // only allow for methods
1986 if (!privileged) break; // only allow in privileged code
1987 return _method_InjectedProfile;
1988 }
1989 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1990 if (_location != _in_method) break; // only allow for methods
1991 if (!privileged) break; // only allow in privileged code
1992 return _method_LambdaForm_Compiled;
1993 }
1994 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
1995 if (_location != _in_method) break; // only allow for methods
1996 if (!privileged) break; // only allow in privileged code
1997 return _method_LambdaForm_Hidden;
1998 }
1999 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2000 if (_location != _in_method) break; // only allow for methods
2001 if (!privileged) break; // only allow in privileged code
2002 return _method_HotSpotIntrinsicCandidate;
2003 }
2004 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2005 if (_location != _in_field) break; // only allow for fields
2006 if (!privileged) break; // only allow in privileged code
2007 return _field_Stable;
2008 }
2009 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2010 if (_location != _in_field && _location != _in_class) {
2011 break; // only allow for fields and classes
2012 }
2013 if (!EnableContended || (RestrictContended && !privileged)) {
2014 break; // honor privileges
2015 }
2016 return _jdk_internal_vm_annotation_Contended;
2017 }
2018 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2019 if (_location != _in_method) break; // only allow for methods
2020 if (RestrictReservedStack && !privileged) break; // honor privileges
2021 return _jdk_internal_vm_annotation_ReservedStackAccess;
2022 }
2023 default: {
2024 break;
2025 }
2026 }
2027 return AnnotationCollector::_unknown;
2028 }
2029
2030 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2031 if (is_contended())
2032 f->set_contended_group(contended_group());
2033 if (is_stable())
2034 f->set_stable(true);
2035 }
2036
2037 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2038 // If there's an error deallocate metadata for field annotations
2039 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2040 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2041 }
2042
2043 void MethodAnnotationCollector::apply_to(methodHandle m) {
2044 if (has_annotation(_method_CallerSensitive))
2045 m->set_caller_sensitive(true);
2046 if (has_annotation(_method_ForceInline))
2047 m->set_force_inline(true);
2048 if (has_annotation(_method_DontInline))
2049 m->set_dont_inline(true);
2050 if (has_annotation(_method_InjectedProfile))
2051 m->set_has_injected_profile(true);
2052 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2053 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2054 if (has_annotation(_method_LambdaForm_Hidden))
2055 m->set_hidden(true);
2056 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2057 m->set_intrinsic_candidate(true);
2058 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2059 m->set_has_reserved_stack_access(true);
2060 }
2061
2062 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2063 assert(ik != NULL, "invariant");
2064 ik->set_is_contended(is_contended());
2065 }
2066
2067 #define MAX_ARGS_SIZE 255
2068 #define MAX_CODE_SIZE 65535
2069 #define INITIAL_MAX_LVT_NUMBER 256
2070
2071 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2072 *
2073 * Rules for LVT's and LVTT's are:
2074 * - There can be any number of LVT's and LVTT's.
2075 * - If there are n LVT's, it is the same as if there was just
2076 * one LVT containing all the entries from the n LVT's.
2077 * - There may be no more than one LVT entry per local variable.
2078 * Two LVT entries are 'equal' if these fields are the same:
2079 * start_pc, length, name, slot
2080 * - There may be no more than one LVTT entry per each LVT entry.
2081 * Each LVTT entry has to match some LVT entry.
2082 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2083 */
2084 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2085 int lvt_cnt,
2086 u2* const localvariable_table_length,
2087 const u2**const localvariable_table_start,
2088 int lvtt_cnt,
2089 u2* const localvariable_type_table_length,
2090 const u2**const localvariable_type_table_start,
2091 TRAPS) {
2092
2093 ResourceMark rm(THREAD);
2094
2095 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2096 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2097
2098 LVT_HashTable* const table = new LVT_HashTable();
2099
2100 // To fill LocalVariableTable in
2101 const Classfile_LVT_Element* cf_lvt;
2102 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2103
2104 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2105 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2106 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2107 copy_lvt_element(&cf_lvt[idx], lvt);
2108 // If no duplicates, add LVT elem in hashtable.
2109 if (table->put(*lvt, lvt) == false
2110 && _need_verify
2111 && _major_version >= JAVA_1_5_VERSION) {
2112 classfile_parse_error("Duplicated LocalVariableTable attribute "
2113 "entry for '%s' in class file %s",
2114 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2115 CHECK);
2116 }
2117 }
2118 }
2119
2120 // To merge LocalVariableTable and LocalVariableTypeTable
2121 const Classfile_LVT_Element* cf_lvtt;
2122 LocalVariableTableElement lvtt_elem;
2123
2124 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2125 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2126 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2127 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2128 LocalVariableTableElement** entry = table->get(lvtt_elem);
2129 if (entry == NULL) {
2130 if (_need_verify) {
2131 classfile_parse_error("LVTT entry for '%s' in class file %s "
2132 "does not match any LVT entry",
2133 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2134 CHECK);
2135 }
2136 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2137 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2138 "entry for '%s' in class file %s",
2139 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2140 CHECK);
2141 } else {
2142 // to add generic signatures into LocalVariableTable
2143 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2144 }
2145 }
2146 }
2147 }
2148
2149
2150 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2151 const u1* runtime_visible_annotations,
2152 int runtime_visible_annotations_length,
2153 const u1* runtime_invisible_annotations,
2154 int runtime_invisible_annotations_length,
2155 const u1* runtime_visible_parameter_annotations,
2156 int runtime_visible_parameter_annotations_length,
2157 const u1* runtime_invisible_parameter_annotations,
2158 int runtime_invisible_parameter_annotations_length,
2159 const u1* runtime_visible_type_annotations,
2160 int runtime_visible_type_annotations_length,
2161 const u1* runtime_invisible_type_annotations,
2162 int runtime_invisible_type_annotations_length,
2163 const u1* annotation_default,
2164 int annotation_default_length,
2165 TRAPS) {
2166
2167 AnnotationArray* a;
2168
2169 if (runtime_visible_annotations_length +
2170 runtime_invisible_annotations_length > 0) {
2171 a = assemble_annotations(runtime_visible_annotations,
2172 runtime_visible_annotations_length,
2173 runtime_invisible_annotations,
2174 runtime_invisible_annotations_length,
2175 CHECK);
2176 cm->set_method_annotations(a);
2177 }
2178
2179 if (runtime_visible_parameter_annotations_length +
2180 runtime_invisible_parameter_annotations_length > 0) {
2181 a = assemble_annotations(runtime_visible_parameter_annotations,
2182 runtime_visible_parameter_annotations_length,
2183 runtime_invisible_parameter_annotations,
2184 runtime_invisible_parameter_annotations_length,
2185 CHECK);
2186 cm->set_parameter_annotations(a);
2187 }
2188
2189 if (annotation_default_length > 0) {
2190 a = assemble_annotations(annotation_default,
2191 annotation_default_length,
2192 NULL,
2193 0,
2194 CHECK);
2195 cm->set_default_annotations(a);
2196 }
2197
2198 if (runtime_visible_type_annotations_length +
2199 runtime_invisible_type_annotations_length > 0) {
2200 a = assemble_annotations(runtime_visible_type_annotations,
2201 runtime_visible_type_annotations_length,
2202 runtime_invisible_type_annotations,
2203 runtime_invisible_type_annotations_length,
2204 CHECK);
2205 cm->set_type_annotations(a);
2206 }
2207 }
2208
2209
2210 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2211 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2212 // Method* to save footprint, so we only know the size of the resulting Method* when the
2213 // entire method attribute is parsed.
2214 //
2215 // The promoted_flags parameter is used to pass relevant access_flags
2216 // from the method back up to the containing klass. These flag values
2217 // are added to klass's access_flags.
2218
2219 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2220 bool is_interface,
2221 const ConstantPool* cp,
2222 AccessFlags* const promoted_flags,
2223 TRAPS) {
2224 assert(cfs != NULL, "invariant");
2225 assert(cp != NULL, "invariant");
2226 assert(promoted_flags != NULL, "invariant");
2227
2228 ResourceMark rm(THREAD);
2229 // Parse fixed parts:
2230 // access_flags, name_index, descriptor_index, attributes_count
2231 cfs->guarantee_more(8, CHECK_NULL);
2232
2233 int flags = cfs->get_u2_fast();
2234 const u2 name_index = cfs->get_u2_fast();
2235 const int cp_size = cp->length();
2236 check_property(
2237 valid_symbol_at(name_index),
2238 "Illegal constant pool index %u for method name in class file %s",
2239 name_index, CHECK_NULL);
2240 const Symbol* const name = cp->symbol_at(name_index);
2241 verify_legal_method_name(name, CHECK_NULL);
2242
2243 const u2 signature_index = cfs->get_u2_fast();
2244 guarantee_property(
2245 valid_symbol_at(signature_index),
2246 "Illegal constant pool index %u for method signature in class file %s",
2247 signature_index, CHECK_NULL);
2248 const Symbol* const signature = cp->symbol_at(signature_index);
2249
2250 if (name == vmSymbols::class_initializer_name()) {
2251 // We ignore the other access flags for a valid class initializer.
2252 // (JVM Spec 2nd ed., chapter 4.6)
2253 if (_major_version < 51) { // backward compatibility
2254 flags = JVM_ACC_STATIC;
2255 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2256 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2257 } else {
2258 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2259 }
2260 } else {
2261 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2262 }
2263
2264 if (name == vmSymbols::object_initializer_name() && is_interface) {
2265 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2266 }
2267
2268 int args_size = -1; // only used when _need_verify is true
2269 if (_need_verify) {
2270 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2271 verify_legal_method_signature(name, signature, CHECK_NULL);
2272 if (args_size > MAX_ARGS_SIZE) {
2273 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2274 }
2275 }
2276
2277 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2278
2279 // Default values for code and exceptions attribute elements
2280 u2 max_stack = 0;
2281 u2 max_locals = 0;
2282 u4 code_length = 0;
2283 const u1* code_start = 0;
2284 u2 exception_table_length = 0;
2285 const u2* exception_table_start = NULL;
2286 Array<int>* exception_handlers = Universe::the_empty_int_array();
2287 u2 checked_exceptions_length = 0;
2288 const u2* checked_exceptions_start = NULL;
2289 CompressedLineNumberWriteStream* linenumber_table = NULL;
2290 int linenumber_table_length = 0;
2291 int total_lvt_length = 0;
2292 u2 lvt_cnt = 0;
2293 u2 lvtt_cnt = 0;
2294 bool lvt_allocated = false;
2295 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2296 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2297 u2* localvariable_table_length = NULL;
2298 const u2** localvariable_table_start = NULL;
2299 u2* localvariable_type_table_length = NULL;
2300 const u2** localvariable_type_table_start = NULL;
2301 int method_parameters_length = -1;
2302 const u1* method_parameters_data = NULL;
2303 bool method_parameters_seen = false;
2304 bool parsed_code_attribute = false;
2305 bool parsed_checked_exceptions_attribute = false;
2306 bool parsed_stackmap_attribute = false;
2307 // stackmap attribute - JDK1.5
2308 const u1* stackmap_data = NULL;
2309 int stackmap_data_length = 0;
2310 u2 generic_signature_index = 0;
2311 MethodAnnotationCollector parsed_annotations;
2312 const u1* runtime_visible_annotations = NULL;
2313 int runtime_visible_annotations_length = 0;
2314 const u1* runtime_invisible_annotations = NULL;
2315 int runtime_invisible_annotations_length = 0;
2316 const u1* runtime_visible_parameter_annotations = NULL;
2317 int runtime_visible_parameter_annotations_length = 0;
2318 const u1* runtime_invisible_parameter_annotations = NULL;
2319 int runtime_invisible_parameter_annotations_length = 0;
2320 const u1* runtime_visible_type_annotations = NULL;
2321 int runtime_visible_type_annotations_length = 0;
2322 const u1* runtime_invisible_type_annotations = NULL;
2323 int runtime_invisible_type_annotations_length = 0;
2324 bool runtime_invisible_annotations_exists = false;
2325 bool runtime_invisible_type_annotations_exists = false;
2326 bool runtime_invisible_parameter_annotations_exists = false;
2327 const u1* annotation_default = NULL;
2328 int annotation_default_length = 0;
2329
2330 // Parse code and exceptions attribute
2331 u2 method_attributes_count = cfs->get_u2_fast();
2332 while (method_attributes_count--) {
2333 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2334 const u2 method_attribute_name_index = cfs->get_u2_fast();
2335 const u4 method_attribute_length = cfs->get_u4_fast();
2336 check_property(
2337 valid_symbol_at(method_attribute_name_index),
2338 "Invalid method attribute name index %u in class file %s",
2339 method_attribute_name_index, CHECK_NULL);
2340
2341 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2342 if (method_attribute_name == vmSymbols::tag_code()) {
2343 // Parse Code attribute
2344 if (_need_verify) {
2345 guarantee_property(
2346 !access_flags.is_native() && !access_flags.is_abstract(),
2347 "Code attribute in native or abstract methods in class file %s",
2348 CHECK_NULL);
2349 }
2350 if (parsed_code_attribute) {
2351 classfile_parse_error("Multiple Code attributes in class file %s",
2352 CHECK_NULL);
2353 }
2354 parsed_code_attribute = true;
2355
2356 // Stack size, locals size, and code size
2357 if (_major_version == 45 && _minor_version <= 2) {
2358 cfs->guarantee_more(4, CHECK_NULL);
2359 max_stack = cfs->get_u1_fast();
2360 max_locals = cfs->get_u1_fast();
2361 code_length = cfs->get_u2_fast();
2362 } else {
2363 cfs->guarantee_more(8, CHECK_NULL);
2364 max_stack = cfs->get_u2_fast();
2365 max_locals = cfs->get_u2_fast();
2366 code_length = cfs->get_u4_fast();
2367 }
2368 if (_need_verify) {
2369 guarantee_property(args_size <= max_locals,
2370 "Arguments can't fit into locals in class file %s",
2371 CHECK_NULL);
2372 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2373 "Invalid method Code length %u in class file %s",
2374 code_length, CHECK_NULL);
2375 }
2376 // Code pointer
2377 code_start = cfs->get_u1_buffer();
2378 assert(code_start != NULL, "null code start");
2379 cfs->guarantee_more(code_length, CHECK_NULL);
2380 cfs->skip_u1_fast(code_length);
2381
2382 // Exception handler table
2383 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2384 exception_table_length = cfs->get_u2_fast();
2385 if (exception_table_length > 0) {
2386 exception_table_start = parse_exception_table(cfs,
2387 code_length,
2388 exception_table_length,
2389 CHECK_NULL);
2390 }
2391
2392 // Parse additional attributes in code attribute
2393 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2394 u2 code_attributes_count = cfs->get_u2_fast();
2395
2396 unsigned int calculated_attribute_length = 0;
2397
2398 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2399 calculated_attribute_length =
2400 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2401 } else {
2402 // max_stack, locals and length are smaller in pre-version 45.2 classes
2403 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2404 }
2405 calculated_attribute_length +=
2406 code_length +
2407 sizeof(exception_table_length) +
2408 sizeof(code_attributes_count) +
2409 exception_table_length *
2410 ( sizeof(u2) + // start_pc
2411 sizeof(u2) + // end_pc
2412 sizeof(u2) + // handler_pc
2413 sizeof(u2) ); // catch_type_index
2414
2415 while (code_attributes_count--) {
2416 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2417 const u2 code_attribute_name_index = cfs->get_u2_fast();
2418 const u4 code_attribute_length = cfs->get_u4_fast();
2419 calculated_attribute_length += code_attribute_length +
2420 sizeof(code_attribute_name_index) +
2421 sizeof(code_attribute_length);
2422 check_property(valid_symbol_at(code_attribute_name_index),
2423 "Invalid code attribute name index %u in class file %s",
2424 code_attribute_name_index,
2425 CHECK_NULL);
2426 if (LoadLineNumberTables &&
2427 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2428 // Parse and compress line number table
2429 parse_linenumber_table(code_attribute_length,
2430 code_length,
2431 &linenumber_table,
2432 CHECK_NULL);
2433
2434 } else if (LoadLocalVariableTables &&
2435 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2436 // Parse local variable table
2437 if (!lvt_allocated) {
2438 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2439 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2440 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2441 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2442 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2443 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2444 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2445 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2446 lvt_allocated = true;
2447 }
2448 if (lvt_cnt == max_lvt_cnt) {
2449 max_lvt_cnt <<= 1;
2450 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2451 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2452 }
2453 localvariable_table_start[lvt_cnt] =
2454 parse_localvariable_table(cfs,
2455 code_length,
2456 max_locals,
2457 code_attribute_length,
2458 &localvariable_table_length[lvt_cnt],
2459 false, // is not LVTT
2460 CHECK_NULL);
2461 total_lvt_length += localvariable_table_length[lvt_cnt];
2462 lvt_cnt++;
2463 } else if (LoadLocalVariableTypeTables &&
2464 _major_version >= JAVA_1_5_VERSION &&
2465 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2466 if (!lvt_allocated) {
2467 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2468 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2469 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2470 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2471 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2472 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2473 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2474 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2475 lvt_allocated = true;
2476 }
2477 // Parse local variable type table
2478 if (lvtt_cnt == max_lvtt_cnt) {
2479 max_lvtt_cnt <<= 1;
2480 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2481 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2482 }
2483 localvariable_type_table_start[lvtt_cnt] =
2484 parse_localvariable_table(cfs,
2485 code_length,
2486 max_locals,
2487 code_attribute_length,
2488 &localvariable_type_table_length[lvtt_cnt],
2489 true, // is LVTT
2490 CHECK_NULL);
2491 lvtt_cnt++;
2492 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2493 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2494 // Stack map is only needed by the new verifier in JDK1.5.
2495 if (parsed_stackmap_attribute) {
2496 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2497 }
2498 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2499 stackmap_data_length = code_attribute_length;
2500 parsed_stackmap_attribute = true;
2501 } else {
2502 // Skip unknown attributes
2503 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2504 }
2505 }
2506 // check method attribute length
2507 if (_need_verify) {
2508 guarantee_property(method_attribute_length == calculated_attribute_length,
2509 "Code segment has wrong length in class file %s",
2510 CHECK_NULL);
2511 }
2512 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2513 // Parse Exceptions attribute
2514 if (parsed_checked_exceptions_attribute) {
2515 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2516 CHECK_NULL);
2517 }
2518 parsed_checked_exceptions_attribute = true;
2519 checked_exceptions_start =
2520 parse_checked_exceptions(cfs,
2521 &checked_exceptions_length,
2522 method_attribute_length,
2523 CHECK_NULL);
2524 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2525 // reject multiple method parameters
2526 if (method_parameters_seen) {
2527 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2528 CHECK_NULL);
2529 }
2530 method_parameters_seen = true;
2531 method_parameters_length = cfs->get_u1_fast();
2532 const u2 real_length = (method_parameters_length * 4u) + 1u;
2533 if (method_attribute_length != real_length) {
2534 classfile_parse_error(
2535 "Invalid MethodParameters method attribute length %u in class file",
2536 method_attribute_length, CHECK_NULL);
2537 }
2538 method_parameters_data = cfs->get_u1_buffer();
2539 cfs->skip_u2_fast(method_parameters_length);
2540 cfs->skip_u2_fast(method_parameters_length);
2541 // ignore this attribute if it cannot be reflected
2542 if (!SystemDictionary::Parameter_klass_loaded())
2543 method_parameters_length = -1;
2544 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2545 if (method_attribute_length != 0) {
2546 classfile_parse_error(
2547 "Invalid Synthetic method attribute length %u in class file %s",
2548 method_attribute_length, CHECK_NULL);
2549 }
2550 // Should we check that there hasn't already been a synthetic attribute?
2551 access_flags.set_is_synthetic();
2552 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2553 if (method_attribute_length != 0) {
2554 classfile_parse_error(
2555 "Invalid Deprecated method attribute length %u in class file %s",
2556 method_attribute_length, CHECK_NULL);
2557 }
2558 } else if (_major_version >= JAVA_1_5_VERSION) {
2559 if (method_attribute_name == vmSymbols::tag_signature()) {
2560 if (method_attribute_length != 2) {
2561 classfile_parse_error(
2562 "Invalid Signature attribute length %u in class file %s",
2563 method_attribute_length, CHECK_NULL);
2564 }
2565 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2566 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2567 if (runtime_visible_annotations != NULL) {
2568 classfile_parse_error(
2569 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2570 CHECK_NULL);
2571 }
2572 runtime_visible_annotations_length = method_attribute_length;
2573 runtime_visible_annotations = cfs->get_u1_buffer();
2574 assert(runtime_visible_annotations != NULL, "null visible annotations");
2575 parse_annotations(cp,
2576 runtime_visible_annotations,
2577 runtime_visible_annotations_length,
2578 &parsed_annotations,
2579 _loader_data,
2580 CHECK_NULL);
2581 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2582 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2583 if (runtime_invisible_annotations_exists) {
2584 classfile_parse_error(
2585 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2586 CHECK_NULL);
2587 }
2588 runtime_invisible_annotations_exists = true;
2589 if (PreserveAllAnnotations) {
2590 runtime_invisible_annotations_length = method_attribute_length;
2591 runtime_invisible_annotations = cfs->get_u1_buffer();
2592 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2593 }
2594 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2595 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2596 if (runtime_visible_parameter_annotations != NULL) {
2597 classfile_parse_error(
2598 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2599 CHECK_NULL);
2600 }
2601 runtime_visible_parameter_annotations_length = method_attribute_length;
2602 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2603 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2604 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2605 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2606 if (runtime_invisible_parameter_annotations_exists) {
2607 classfile_parse_error(
2608 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2609 CHECK_NULL);
2610 }
2611 runtime_invisible_parameter_annotations_exists = true;
2612 if (PreserveAllAnnotations) {
2613 runtime_invisible_parameter_annotations_length = method_attribute_length;
2614 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2615 assert(runtime_invisible_parameter_annotations != NULL,
2616 "null invisible parameter annotations");
2617 }
2618 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2619 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2620 if (annotation_default != NULL) {
2621 classfile_parse_error(
2622 "Multiple AnnotationDefault attributes for method in class file %s",
2623 CHECK_NULL);
2624 }
2625 annotation_default_length = method_attribute_length;
2626 annotation_default = cfs->get_u1_buffer();
2627 assert(annotation_default != NULL, "null annotation default");
2628 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2629 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2630 if (runtime_visible_type_annotations != NULL) {
2631 classfile_parse_error(
2632 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2633 CHECK_NULL);
2634 }
2635 runtime_visible_type_annotations_length = method_attribute_length;
2636 runtime_visible_type_annotations = cfs->get_u1_buffer();
2637 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2638 // No need for the VM to parse Type annotations
2639 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2640 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2641 if (runtime_invisible_type_annotations_exists) {
2642 classfile_parse_error(
2643 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2644 CHECK_NULL);
2645 } else {
2646 runtime_invisible_type_annotations_exists = true;
2647 }
2648 if (PreserveAllAnnotations) {
2649 runtime_invisible_type_annotations_length = method_attribute_length;
2650 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2651 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2652 }
2653 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2654 } else {
2655 // Skip unknown attributes
2656 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2657 }
2658 } else {
2659 // Skip unknown attributes
2660 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2661 }
2662 }
2663
2664 if (linenumber_table != NULL) {
2665 linenumber_table->write_terminator();
2666 linenumber_table_length = linenumber_table->position();
2667 }
2668
2669 // Make sure there's at least one Code attribute in non-native/non-abstract method
2670 if (_need_verify) {
2671 guarantee_property(access_flags.is_native() ||
2672 access_flags.is_abstract() ||
2673 parsed_code_attribute,
2674 "Absent Code attribute in method that is not native or abstract in class file %s",
2675 CHECK_NULL);
2676 }
2677
2678 // All sizing information for a Method* is finally available, now create it
2679 InlineTableSizes sizes(
2680 total_lvt_length,
2681 linenumber_table_length,
2682 exception_table_length,
2683 checked_exceptions_length,
2684 method_parameters_length,
2685 generic_signature_index,
2686 runtime_visible_annotations_length +
2687 runtime_invisible_annotations_length,
2688 runtime_visible_parameter_annotations_length +
2689 runtime_invisible_parameter_annotations_length,
2690 runtime_visible_type_annotations_length +
2691 runtime_invisible_type_annotations_length,
2692 annotation_default_length,
2693 0);
2694
2695 Method* const m = Method::allocate(_loader_data,
2696 code_length,
2697 access_flags,
2698 &sizes,
2699 ConstMethod::NORMAL,
2700 CHECK_NULL);
2701
2702 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2703
2704 // Fill in information from fixed part (access_flags already set)
2705 m->set_constants(_cp);
2706 m->set_name_index(name_index);
2707 m->set_signature_index(signature_index);
2708
2709 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2710 m->constMethod()->set_result_type(rtf.type());
2711
2712 if (args_size >= 0) {
2713 m->set_size_of_parameters(args_size);
2714 } else {
2715 m->compute_size_of_parameters(THREAD);
2716 }
2717 #ifdef ASSERT
2718 if (args_size >= 0) {
2719 m->compute_size_of_parameters(THREAD);
2720 assert(args_size == m->size_of_parameters(), "");
2721 }
2722 #endif
2723
2724 // Fill in code attribute information
2725 m->set_max_stack(max_stack);
2726 m->set_max_locals(max_locals);
2727 if (stackmap_data != NULL) {
2728 m->constMethod()->copy_stackmap_data(_loader_data,
2729 (u1*)stackmap_data,
2730 stackmap_data_length,
2731 CHECK_NULL);
2732 }
2733
2734 // Copy byte codes
2735 m->set_code((u1*)code_start);
2736
2737 // Copy line number table
2738 if (linenumber_table != NULL) {
2739 memcpy(m->compressed_linenumber_table(),
2740 linenumber_table->buffer(),
2741 linenumber_table_length);
2742 }
2743
2744 // Copy exception table
2745 if (exception_table_length > 0) {
2746 int size =
2747 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2748 copy_u2_with_conversion((u2*) m->exception_table_start(),
2749 exception_table_start, size);
2750 }
2751
2752 // Copy method parameters
2753 if (method_parameters_length > 0) {
2754 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2755 for (int i = 0; i < method_parameters_length; i++) {
2756 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2757 method_parameters_data += 2;
2758 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2759 method_parameters_data += 2;
2760 }
2761 }
2762
2763 // Copy checked exceptions
2764 if (checked_exceptions_length > 0) {
2765 const int size =
2766 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2767 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2768 checked_exceptions_start,
2769 size);
2770 }
2771
2772 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2773 if (total_lvt_length > 0) {
2774 promoted_flags->set_has_localvariable_table();
2775 copy_localvariable_table(m->constMethod(),
2776 lvt_cnt,
2777 localvariable_table_length,
2778 localvariable_table_start,
2779 lvtt_cnt,
2780 localvariable_type_table_length,
2781 localvariable_type_table_start,
2782 CHECK_NULL);
2783 }
2784
2785 if (parsed_annotations.has_any_annotations())
2786 parsed_annotations.apply_to(m);
2787
2788 // Copy annotations
2789 copy_method_annotations(m->constMethod(),
2790 runtime_visible_annotations,
2791 runtime_visible_annotations_length,
2792 runtime_invisible_annotations,
2793 runtime_invisible_annotations_length,
2794 runtime_visible_parameter_annotations,
2795 runtime_visible_parameter_annotations_length,
2796 runtime_invisible_parameter_annotations,
2797 runtime_invisible_parameter_annotations_length,
2798 runtime_visible_type_annotations,
2799 runtime_visible_type_annotations_length,
2800 runtime_invisible_type_annotations,
2801 runtime_invisible_type_annotations_length,
2802 annotation_default,
2803 annotation_default_length,
2804 CHECK_NULL);
2805
2806 if (name == vmSymbols::finalize_method_name() &&
2807 signature == vmSymbols::void_method_signature()) {
2808 if (m->is_empty_method()) {
2809 _has_empty_finalizer = true;
2810 } else {
2811 _has_finalizer = true;
2812 }
2813 }
2814 if (name == vmSymbols::object_initializer_name() &&
2815 signature == vmSymbols::void_method_signature() &&
2816 m->is_vanilla_constructor()) {
2817 _has_vanilla_constructor = true;
2818 }
2819
2820 NOT_PRODUCT(m->verify());
2821 return m;
2822 }
2823
2824
2825 // The promoted_flags parameter is used to pass relevant access_flags
2826 // from the methods back up to the containing klass. These flag values
2827 // are added to klass's access_flags.
2828 // Side-effects: populates the _methods field in the parser
2829 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2830 bool is_interface,
2831 AccessFlags* promoted_flags,
2832 bool* has_final_method,
2833 bool* declares_default_methods,
2834 TRAPS) {
2835 assert(cfs != NULL, "invariant");
2836 assert(promoted_flags != NULL, "invariant");
2837 assert(has_final_method != NULL, "invariant");
2838 assert(declares_default_methods != NULL, "invariant");
2839
2840 assert(NULL == _methods, "invariant");
2841
2842 cfs->guarantee_more(2, CHECK); // length
2843 const u2 length = cfs->get_u2_fast();
2844 if (length == 0) {
2845 _methods = Universe::the_empty_method_array();
2846 } else {
2847 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2848 length,
2849 NULL,
2850 CHECK);
2851
2852 HandleMark hm(THREAD);
2853 for (int index = 0; index < length; index++) {
2854 Method* method = parse_method(cfs,
2855 is_interface,
2856 _cp,
2857 promoted_flags,
2858 CHECK);
2859
2860 if (method->is_final()) {
2861 *has_final_method = true;
2862 }
2863 // declares_default_methods: declares concrete instance methods, any access flags
2864 // used for interface initialization, and default method inheritance analysis
2865 if (is_interface && !(*declares_default_methods)
2866 && !method->is_abstract() && !method->is_static()) {
2867 *declares_default_methods = true;
2868 }
2869 _methods->at_put(index, method);
2870 }
2871
2872 if (_need_verify && length > 1) {
2873 // Check duplicated methods
2874 ResourceMark rm(THREAD);
2875 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2876 THREAD, NameSigHash*, HASH_ROW_SIZE);
2877 initialize_hashtable(names_and_sigs);
2878 bool dup = false;
2879 {
2880 debug_only(NoSafepointVerifier nsv;)
2881 for (int i = 0; i < length; i++) {
2882 const Method* const m = _methods->at(i);
2883 // If no duplicates, add name/signature in hashtable names_and_sigs.
2884 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2885 dup = true;
2886 break;
2887 }
2888 }
2889 }
2890 if (dup) {
2891 classfile_parse_error("Duplicate method name&signature in class file %s",
2892 CHECK);
2893 }
2894 }
2895 }
2896 }
2897
2898 static const intArray* sort_methods(Array<Method*>* methods) {
2899 const int length = methods->length();
2900 // If JVMTI original method ordering or sharing is enabled we have to
2901 // remember the original class file ordering.
2902 // We temporarily use the vtable_index field in the Method* to store the
2903 // class file index, so we can read in after calling qsort.
2904 // Put the method ordering in the shared archive.
2905 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2906 for (int index = 0; index < length; index++) {
2907 Method* const m = methods->at(index);
2908 assert(!m->valid_vtable_index(), "vtable index should not be set");
2909 m->set_vtable_index(index);
2910 }
2911 }
2912 // Sort method array by ascending method name (for faster lookups & vtable construction)
2913 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2914 Method::sort_methods(methods);
2915
2916 intArray* method_ordering = NULL;
2917 // If JVMTI original method ordering or sharing is enabled construct int
2918 // array remembering the original ordering
2919 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2920 method_ordering = new intArray(length, length, -1);
2921 for (int index = 0; index < length; index++) {
2922 Method* const m = methods->at(index);
2923 const int old_index = m->vtable_index();
2924 assert(old_index >= 0 && old_index < length, "invalid method index");
2925 method_ordering->at_put(index, old_index);
2926 m->set_vtable_index(Method::invalid_vtable_index);
2927 }
2928 }
2929 return method_ordering;
2930 }
2931
2932 // Parse generic_signature attribute for methods and fields
2933 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2934 TRAPS) {
2935 assert(cfs != NULL, "invariant");
2936
2937 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2938 const u2 generic_signature_index = cfs->get_u2_fast();
2939 check_property(
2940 valid_symbol_at(generic_signature_index),
2941 "Invalid Signature attribute at constant pool index %u in class file %s",
2942 generic_signature_index, CHECK_0);
2943 return generic_signature_index;
2944 }
2945
2946 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2947 TRAPS) {
2948
2949 assert(cfs != NULL, "invariant");
2950
2951 cfs->guarantee_more(2, CHECK); // sourcefile_index
2952 const u2 sourcefile_index = cfs->get_u2_fast();
2953 check_property(
2954 valid_symbol_at(sourcefile_index),
2955 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2956 sourcefile_index, CHECK);
2957 set_class_sourcefile_index(sourcefile_index);
2958 }
2959
2960 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2961 int length,
2962 TRAPS) {
2963 assert(cfs != NULL, "invariant");
2964
2965 const u1* const sde_buffer = cfs->get_u1_buffer();
2966 assert(sde_buffer != NULL, "null sde buffer");
2967
2968 // Don't bother storing it if there is no way to retrieve it
2969 if (JvmtiExport::can_get_source_debug_extension()) {
2970 assert((length+1) > length, "Overflow checking");
2971 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2972 for (int i = 0; i < length; i++) {
2973 sde[i] = sde_buffer[i];
2974 }
2975 sde[length] = '\0';
2976 set_class_sde_buffer((const char*)sde, length);
2977 }
2978 // Got utf8 string, set stream position forward
2979 cfs->skip_u1(length, CHECK);
2980 }
2981
2982
2983 // Inner classes can be static, private or protected (classic VM does this)
2984 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2985 JVM_ACC_PRIVATE | \
2986 JVM_ACC_PROTECTED | \
2987 JVM_ACC_STATIC \
2988 )
2989
2990 // Return number of classes in the inner classes attribute table
2991 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2992 const u1* const inner_classes_attribute_start,
2993 bool parsed_enclosingmethod_attribute,
2994 u2 enclosing_method_class_index,
2995 u2 enclosing_method_method_index,
2996 TRAPS) {
2997 const u1* const current_mark = cfs->current();
2998 u2 length = 0;
2999 if (inner_classes_attribute_start != NULL) {
3000 cfs->set_current(inner_classes_attribute_start);
3001 cfs->guarantee_more(2, CHECK_0); // length
3002 length = cfs->get_u2_fast();
3003 }
3004
3005 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3006 // method data:
3007 // [inner_class_info_index,
3008 // outer_class_info_index,
3009 // inner_name_index,
3010 // inner_class_access_flags,
3011 // ...
3012 // enclosing_method_class_index,
3013 // enclosing_method_method_index]
3014 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3015 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3016 _inner_classes = inner_classes;
3017
3018 int index = 0;
3019 const int cp_size = _cp->length();
3020 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3021 for (int n = 0; n < length; n++) {
3022 // Inner class index
3023 const u2 inner_class_info_index = cfs->get_u2_fast();
3024 check_property(
3025 valid_klass_reference_at(inner_class_info_index),
3026 "inner_class_info_index %u has bad constant type in class file %s",
3027 inner_class_info_index, CHECK_0);
3028 // Outer class index
3029 const u2 outer_class_info_index = cfs->get_u2_fast();
3030 check_property(
3031 outer_class_info_index == 0 ||
3032 valid_klass_reference_at(outer_class_info_index),
3033 "outer_class_info_index %u has bad constant type in class file %s",
3034 outer_class_info_index, CHECK_0);
3035 // Inner class name
3036 const u2 inner_name_index = cfs->get_u2_fast();
3037 check_property(
3038 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3039 "inner_name_index %u has bad constant type in class file %s",
3040 inner_name_index, CHECK_0);
3041 if (_need_verify) {
3042 guarantee_property(inner_class_info_index != outer_class_info_index,
3043 "Class is both outer and inner class in class file %s", CHECK_0);
3044 }
3045 // Access flags
3046 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3047 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3048 // Set abstract bit for old class files for backward compatibility
3049 flags |= JVM_ACC_ABSTRACT;
3050 }
3051 verify_legal_class_modifiers(flags, CHECK_0);
3052 AccessFlags inner_access_flags(flags);
3053
3054 inner_classes->at_put(index++, inner_class_info_index);
3055 inner_classes->at_put(index++, outer_class_info_index);
3056 inner_classes->at_put(index++, inner_name_index);
3057 inner_classes->at_put(index++, inner_access_flags.as_short());
3058 }
3059
3060 // 4347400: make sure there's no duplicate entry in the classes array
3061 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3062 for(int i = 0; i < length * 4; i += 4) {
3063 for(int j = i + 4; j < length * 4; j += 4) {
3064 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3065 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3066 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3067 inner_classes->at(i+3) != inner_classes->at(j+3)),
3068 "Duplicate entry in InnerClasses in class file %s",
3069 CHECK_0);
3070 }
3071 }
3072 }
3073
3074 // Set EnclosingMethod class and method indexes.
3075 if (parsed_enclosingmethod_attribute) {
3076 inner_classes->at_put(index++, enclosing_method_class_index);
3077 inner_classes->at_put(index++, enclosing_method_method_index);
3078 }
3079 assert(index == size, "wrong size");
3080
3081 // Restore buffer's current position.
3082 cfs->set_current(current_mark);
3083
3084 return length;
3085 }
3086
3087 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3088 set_class_synthetic_flag(true);
3089 }
3090
3091 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3092 assert(cfs != NULL, "invariant");
3093
3094 const u2 signature_index = cfs->get_u2(CHECK);
3095 check_property(
3096 valid_symbol_at(signature_index),
3097 "Invalid constant pool index %u in Signature attribute in class file %s",
3098 signature_index, CHECK);
3099 set_class_generic_signature_index(signature_index);
3100 }
3101
3102 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3103 ConstantPool* cp,
3104 u4 attribute_byte_length,
3105 TRAPS) {
3106 assert(cfs != NULL, "invariant");
3107 assert(cp != NULL, "invariant");
3108
3109 const u1* const current_start = cfs->current();
3110
3111 guarantee_property(attribute_byte_length >= sizeof(u2),
3112 "Invalid BootstrapMethods attribute length %u in class file %s",
3113 attribute_byte_length,
3114 CHECK);
3115
3116 cfs->guarantee_more(attribute_byte_length, CHECK);
3117
3118 const int attribute_array_length = cfs->get_u2_fast();
3119
3120 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3121 "Short length on BootstrapMethods in class file %s",
3122 CHECK);
3123
3124
3125 // The attribute contains a counted array of counted tuples of shorts,
3126 // represending bootstrap specifiers:
3127 // length*{bootstrap_method_index, argument_count*{argument_index}}
3128 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3129 // operand_count = number of shorts in attr, except for leading length
3130
3131 // The attribute is copied into a short[] array.
3132 // The array begins with a series of short[2] pairs, one for each tuple.
3133 const int index_size = (attribute_array_length * 2);
3134
3135 Array<u2>* const operands =
3136 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3137
3138 // Eagerly assign operands so they will be deallocated with the constant
3139 // pool if there is an error.
3140 cp->set_operands(operands);
3141
3142 int operand_fill_index = index_size;
3143 const int cp_size = cp->length();
3144
3145 for (int n = 0; n < attribute_array_length; n++) {
3146 // Store a 32-bit offset into the header of the operand array.
3147 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3148
3149 // Read a bootstrap specifier.
3150 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3151 const u2 bootstrap_method_index = cfs->get_u2_fast();
3152 const u2 argument_count = cfs->get_u2_fast();
3153 check_property(
3154 valid_cp_range(bootstrap_method_index, cp_size) &&
3155 cp->tag_at(bootstrap_method_index).is_method_handle(),
3156 "bootstrap_method_index %u has bad constant type in class file %s",
3157 bootstrap_method_index,
3158 CHECK);
3159
3160 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3161 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3162 CHECK);
3163
3164 operands->at_put(operand_fill_index++, bootstrap_method_index);
3165 operands->at_put(operand_fill_index++, argument_count);
3166
3167 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3168 for (int j = 0; j < argument_count; j++) {
3169 const u2 argument_index = cfs->get_u2_fast();
3170 check_property(
3171 valid_cp_range(argument_index, cp_size) &&
3172 cp->tag_at(argument_index).is_loadable_constant(),
3173 "argument_index %u has bad constant type in class file %s",
3174 argument_index,
3175 CHECK);
3176 operands->at_put(operand_fill_index++, argument_index);
3177 }
3178 }
3179 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3180 "Bad length on BootstrapMethods in class file %s",
3181 CHECK);
3182 }
3183
3184 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3185 ConstantPool* cp,
3186 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3187 TRAPS) {
3188 assert(cfs != NULL, "invariant");
3189 assert(cp != NULL, "invariant");
3190 assert(parsed_annotations != NULL, "invariant");
3191
3192 // Set inner classes attribute to default sentinel
3193 _inner_classes = Universe::the_empty_short_array();
3194 cfs->guarantee_more(2, CHECK); // attributes_count
3195 u2 attributes_count = cfs->get_u2_fast();
3196 bool parsed_sourcefile_attribute = false;
3197 bool parsed_innerclasses_attribute = false;
3198 bool parsed_enclosingmethod_attribute = false;
3199 bool parsed_bootstrap_methods_attribute = false;
3200 const u1* runtime_visible_annotations = NULL;
3201 int runtime_visible_annotations_length = 0;
3202 const u1* runtime_invisible_annotations = NULL;
3203 int runtime_invisible_annotations_length = 0;
3204 const u1* runtime_visible_type_annotations = NULL;
3205 int runtime_visible_type_annotations_length = 0;
3206 const u1* runtime_invisible_type_annotations = NULL;
3207 int runtime_invisible_type_annotations_length = 0;
3208 bool runtime_invisible_type_annotations_exists = false;
3209 bool runtime_invisible_annotations_exists = false;
3210 bool parsed_source_debug_ext_annotations_exist = false;
3211 const u1* inner_classes_attribute_start = NULL;
3212 u4 inner_classes_attribute_length = 0;
3213 u2 enclosing_method_class_index = 0;
3214 u2 enclosing_method_method_index = 0;
3215 // Iterate over attributes
3216 while (attributes_count--) {
3217 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3218 const u2 attribute_name_index = cfs->get_u2_fast();
3219 const u4 attribute_length = cfs->get_u4_fast();
3220 check_property(
3221 valid_symbol_at(attribute_name_index),
3222 "Attribute name has bad constant pool index %u in class file %s",
3223 attribute_name_index, CHECK);
3224 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3225 if (tag == vmSymbols::tag_source_file()) {
3226 // Check for SourceFile tag
3227 if (_need_verify) {
3228 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3229 }
3230 if (parsed_sourcefile_attribute) {
3231 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3232 } else {
3233 parsed_sourcefile_attribute = true;
3234 }
3235 parse_classfile_sourcefile_attribute(cfs, CHECK);
3236 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3237 // Check for SourceDebugExtension tag
3238 if (parsed_source_debug_ext_annotations_exist) {
3239 classfile_parse_error(
3240 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3241 }
3242 parsed_source_debug_ext_annotations_exist = true;
3243 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3244 } else if (tag == vmSymbols::tag_inner_classes()) {
3245 // Check for InnerClasses tag
3246 if (parsed_innerclasses_attribute) {
3247 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3248 } else {
3249 parsed_innerclasses_attribute = true;
3250 }
3251 inner_classes_attribute_start = cfs->get_u1_buffer();
3252 inner_classes_attribute_length = attribute_length;
3253 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3254 } else if (tag == vmSymbols::tag_synthetic()) {
3255 // Check for Synthetic tag
3256 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3257 if (attribute_length != 0) {
3258 classfile_parse_error(
3259 "Invalid Synthetic classfile attribute length %u in class file %s",
3260 attribute_length, CHECK);
3261 }
3262 parse_classfile_synthetic_attribute(CHECK);
3263 } else if (tag == vmSymbols::tag_deprecated()) {
3264 // Check for Deprecatd tag - 4276120
3265 if (attribute_length != 0) {
3266 classfile_parse_error(
3267 "Invalid Deprecated classfile attribute length %u in class file %s",
3268 attribute_length, CHECK);
3269 }
3270 } else if (_major_version >= JAVA_1_5_VERSION) {
3271 if (tag == vmSymbols::tag_signature()) {
3272 if (attribute_length != 2) {
3273 classfile_parse_error(
3274 "Wrong Signature attribute length %u in class file %s",
3275 attribute_length, CHECK);
3276 }
3277 parse_classfile_signature_attribute(cfs, CHECK);
3278 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3279 if (runtime_visible_annotations != NULL) {
3280 classfile_parse_error(
3281 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3282 }
3283 runtime_visible_annotations_length = attribute_length;
3284 runtime_visible_annotations = cfs->get_u1_buffer();
3285 assert(runtime_visible_annotations != NULL, "null visible annotations");
3286 parse_annotations(cp,
3287 runtime_visible_annotations,
3288 runtime_visible_annotations_length,
3289 parsed_annotations,
3290 _loader_data,
3291 CHECK);
3292 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3293 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3294 if (runtime_invisible_annotations_exists) {
3295 classfile_parse_error(
3296 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3297 }
3298 runtime_invisible_annotations_exists = true;
3299 if (PreserveAllAnnotations) {
3300 runtime_invisible_annotations_length = attribute_length;
3301 runtime_invisible_annotations = cfs->get_u1_buffer();
3302 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3303 }
3304 cfs->skip_u1(attribute_length, CHECK);
3305 } else if (tag == vmSymbols::tag_enclosing_method()) {
3306 if (parsed_enclosingmethod_attribute) {
3307 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3308 } else {
3309 parsed_enclosingmethod_attribute = true;
3310 }
3311 guarantee_property(attribute_length == 4,
3312 "Wrong EnclosingMethod attribute length %u in class file %s",
3313 attribute_length, CHECK);
3314 cfs->guarantee_more(4, CHECK); // class_index, method_index
3315 enclosing_method_class_index = cfs->get_u2_fast();
3316 enclosing_method_method_index = cfs->get_u2_fast();
3317 if (enclosing_method_class_index == 0) {
3318 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3319 }
3320 // Validate the constant pool indices and types
3321 check_property(valid_klass_reference_at(enclosing_method_class_index),
3322 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3323 if (enclosing_method_method_index != 0 &&
3324 (!cp->is_within_bounds(enclosing_method_method_index) ||
3325 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3326 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3327 }
3328 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3329 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3330 if (parsed_bootstrap_methods_attribute) {
3331 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3332 }
3333 parsed_bootstrap_methods_attribute = true;
3334 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3335 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3336 if (runtime_visible_type_annotations != NULL) {
3337 classfile_parse_error(
3338 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3339 }
3340 runtime_visible_type_annotations_length = attribute_length;
3341 runtime_visible_type_annotations = cfs->get_u1_buffer();
3342 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3343 // No need for the VM to parse Type annotations
3344 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3345 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3346 if (runtime_invisible_type_annotations_exists) {
3347 classfile_parse_error(
3348 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3349 } else {
3350 runtime_invisible_type_annotations_exists = true;
3351 }
3352 if (PreserveAllAnnotations) {
3353 runtime_invisible_type_annotations_length = attribute_length;
3354 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3355 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3356 }
3357 cfs->skip_u1(attribute_length, CHECK);
3358 } else {
3359 // Unknown attribute
3360 cfs->skip_u1(attribute_length, CHECK);
3361 }
3362 } else {
3363 // Unknown attribute
3364 cfs->skip_u1(attribute_length, CHECK);
3365 }
3366 }
3367 _annotations = assemble_annotations(runtime_visible_annotations,
3368 runtime_visible_annotations_length,
3369 runtime_invisible_annotations,
3370 runtime_invisible_annotations_length,
3371 CHECK);
3372 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3373 runtime_visible_type_annotations_length,
3374 runtime_invisible_type_annotations,
3375 runtime_invisible_type_annotations_length,
3376 CHECK);
3377
3378 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3379 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3380 cfs,
3381 inner_classes_attribute_start,
3382 parsed_innerclasses_attribute,
3383 enclosing_method_class_index,
3384 enclosing_method_method_index,
3385 CHECK);
3386 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3387 guarantee_property(
3388 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3389 "Wrong InnerClasses attribute length in class file %s", CHECK);
3390 }
3391 }
3392
3393 if (_max_bootstrap_specifier_index >= 0) {
3394 guarantee_property(parsed_bootstrap_methods_attribute,
3395 "Missing BootstrapMethods attribute in class file %s", CHECK);
3396 }
3397 }
3398
3399 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3400 assert(k != NULL, "invariant");
3401
3402 if (_synthetic_flag)
3403 k->set_is_synthetic();
3404 if (_sourcefile_index != 0) {
3405 k->set_source_file_name_index(_sourcefile_index);
3406 }
3407 if (_generic_signature_index != 0) {
3408 k->set_generic_signature_index(_generic_signature_index);
3409 }
3410 if (_sde_buffer != NULL) {
3411 k->set_source_debug_extension(_sde_buffer, _sde_length);
3412 }
3413 }
3414
3415 // Create the Annotations object that will
3416 // hold the annotations array for the Klass.
3417 void ClassFileParser::create_combined_annotations(TRAPS) {
3418 if (_annotations == NULL &&
3419 _type_annotations == NULL &&
3420 _fields_annotations == NULL &&
3421 _fields_type_annotations == NULL) {
3422 // Don't create the Annotations object unnecessarily.
3423 return;
3424 }
3425
3426 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3427 annotations->set_class_annotations(_annotations);
3428 annotations->set_class_type_annotations(_type_annotations);
3429 annotations->set_fields_annotations(_fields_annotations);
3430 annotations->set_fields_type_annotations(_fields_type_annotations);
3431
3432 // This is the Annotations object that will be
3433 // assigned to InstanceKlass being constructed.
3434 _combined_annotations = annotations;
3435
3436 // The annotations arrays below has been transfered the
3437 // _combined_annotations so these fields can now be cleared.
3438 _annotations = NULL;
3439 _type_annotations = NULL;
3440 _fields_annotations = NULL;
3441 _fields_type_annotations = NULL;
3442 }
3443
3444 // Transfer ownership of metadata allocated to the InstanceKlass.
3445 void ClassFileParser::apply_parsed_class_metadata(
3446 InstanceKlass* this_klass,
3447 int java_fields_count, TRAPS) {
3448 assert(this_klass != NULL, "invariant");
3449
3450 _cp->set_pool_holder(this_klass);
3451 this_klass->set_constants(_cp);
3452 this_klass->set_fields(_fields, java_fields_count);
3453 this_klass->set_methods(_methods);
3454 this_klass->set_inner_classes(_inner_classes);
3455 this_klass->set_local_interfaces(_local_interfaces);
3456 this_klass->set_transitive_interfaces(_transitive_interfaces);
3457 this_klass->set_annotations(_combined_annotations);
3458
3459 // Clear out these fields so they don't get deallocated by the destructor
3460 clear_class_metadata();
3461 }
3462
3463 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3464 int runtime_visible_annotations_length,
3465 const u1* const runtime_invisible_annotations,
3466 int runtime_invisible_annotations_length,
3467 TRAPS) {
3468 AnnotationArray* annotations = NULL;
3469 if (runtime_visible_annotations != NULL ||
3470 runtime_invisible_annotations != NULL) {
3471 annotations = MetadataFactory::new_array<u1>(_loader_data,
3472 runtime_visible_annotations_length +
3473 runtime_invisible_annotations_length,
3474 CHECK_(annotations));
3475 if (runtime_visible_annotations != NULL) {
3476 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3477 annotations->at_put(i, runtime_visible_annotations[i]);
3478 }
3479 }
3480 if (runtime_invisible_annotations != NULL) {
3481 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3482 int append = runtime_visible_annotations_length+i;
3483 annotations->at_put(append, runtime_invisible_annotations[i]);
3484 }
3485 }
3486 }
3487 return annotations;
3488 }
3489
3490 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3491 const int super_class_index,
3492 const bool need_verify,
3493 TRAPS) {
3494 assert(cp != NULL, "invariant");
3495 const InstanceKlass* super_klass = NULL;
3496
3497 if (super_class_index == 0) {
3498 check_property(_class_name == vmSymbols::java_lang_Object(),
3499 "Invalid superclass index %u in class file %s",
3500 super_class_index,
3501 CHECK_NULL);
3502 } else {
3503 check_property(valid_klass_reference_at(super_class_index),
3504 "Invalid superclass index %u in class file %s",
3505 super_class_index,
3506 CHECK_NULL);
3507 // The class name should be legal because it is checked when parsing constant pool.
3508 // However, make sure it is not an array type.
3509 bool is_array = false;
3510 if (cp->tag_at(super_class_index).is_klass()) {
3511 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3512 if (need_verify)
3513 is_array = super_klass->is_array_klass();
3514 } else if (need_verify) {
3515 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3516 }
3517 if (need_verify) {
3518 guarantee_property(!is_array,
3519 "Bad superclass name in class file %s", CHECK_NULL);
3520 }
3521 }
3522 return super_klass;
3523 }
3524
3525 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3526 unsigned int nonstatic_oop_map_count,
3527 int first_nonstatic_oop_offset) {
3528
3529 unsigned int map_count =
3530 NULL == super ? 0 : super->nonstatic_oop_map_count();
3531 if (nonstatic_oop_map_count > 0) {
3532 // We have oops to add to map
3533 if (map_count == 0) {
3534 map_count = nonstatic_oop_map_count;
3535 }
3536 else {
3537 // Check whether we should add a new map block or whether the last one can
3538 // be extended
3539 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3540 const OopMapBlock* const last_map = first_map + map_count - 1;
3541
3542 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3543 if (next_offset == first_nonstatic_oop_offset) {
3544 // There is no gap bettwen superklass's last oop field and first
3545 // local oop field, merge maps.
3546 nonstatic_oop_map_count -= 1;
3547 }
3548 else {
3549 // Superklass didn't end with a oop field, add extra maps
3550 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3551 }
3552 map_count += nonstatic_oop_map_count;
3553 }
3554 }
3555 return map_count;
3556 }
3557
3558 #ifndef PRODUCT
3559 static void print_field_layout(const Symbol* name,
3560 Array<u2>* fields,
3561 constantPoolHandle cp,
3562 int instance_size,
3563 int instance_fields_start,
3564 int instance_fields_end,
3565 int static_fields_end) {
3566
3567 assert(name != NULL, "invariant");
3568
3569 tty->print("%s: field layout\n", name->as_klass_external_name());
3570 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3571 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3572 if (!fs.access_flags().is_static()) {
3573 tty->print(" @%3d \"%s\" %s\n",
3574 fs.offset(),
3575 fs.name()->as_klass_external_name(),
3576 fs.signature()->as_klass_external_name());
3577 }
3578 }
3579 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3580 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3581 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3582 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3583 if (fs.access_flags().is_static()) {
3584 tty->print(" @%3d \"%s\" %s\n",
3585 fs.offset(),
3586 fs.name()->as_klass_external_name(),
3587 fs.signature()->as_klass_external_name());
3588 }
3589 }
3590 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3591 tty->print("\n");
3592 }
3593 #endif
3594
3595 // Values needed for oopmap and InstanceKlass creation
3596 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3597 public:
3598 int* nonstatic_oop_offsets;
3599 unsigned int* nonstatic_oop_counts;
3600 unsigned int nonstatic_oop_map_count;
3601 unsigned int total_oop_map_count;
3602 int instance_size;
3603 int nonstatic_field_size;
3604 int static_field_size;
3605 bool has_nonstatic_fields;
3606 };
3607
3608 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3609 void ClassFileParser::layout_fields(ConstantPool* cp,
3610 const FieldAllocationCount* fac,
3611 const ClassAnnotationCollector* parsed_annotations,
3612 FieldLayoutInfo* info,
3613 TRAPS) {
3614
3615 assert(cp != NULL, "invariant");
3616
3617 // Field size and offset computation
3618 int nonstatic_field_size = _super_klass == NULL ? 0 :
3619 _super_klass->nonstatic_field_size();
3620
3621 // Count the contended fields by type.
3622 //
3623 // We ignore static fields, because @Contended is not supported for them.
3624 // The layout code below will also ignore the static fields.
3625 int nonstatic_contended_count = 0;
3626 FieldAllocationCount fac_contended;
3627 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3628 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3629 if (fs.is_contended()) {
3630 fac_contended.count[atype]++;
3631 if (!fs.access_flags().is_static()) {
3632 nonstatic_contended_count++;
3633 }
3634 }
3635 }
3636
3637
3638 // Calculate the starting byte offsets
3639 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3640 int next_static_double_offset = next_static_oop_offset +
3641 ((fac->count[STATIC_OOP]) * heapOopSize);
3642 if ( fac->count[STATIC_DOUBLE] &&
3643 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3644 Universe::field_type_should_be_aligned(T_LONG)) ) {
3645 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3646 }
3647
3648 int next_static_word_offset = next_static_double_offset +
3649 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3650 int next_static_short_offset = next_static_word_offset +
3651 ((fac->count[STATIC_WORD]) * BytesPerInt);
3652 int next_static_byte_offset = next_static_short_offset +
3653 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3654
3655 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3656 nonstatic_field_size * heapOopSize;
3657
3658 int next_nonstatic_field_offset = nonstatic_fields_start;
3659
3660 const bool is_contended_class = parsed_annotations->is_contended();
3661
3662 // Class is contended, pad before all the fields
3663 if (is_contended_class) {
3664 next_nonstatic_field_offset += ContendedPaddingWidth;
3665 }
3666
3667 // Compute the non-contended fields count.
3668 // The packing code below relies on these counts to determine if some field
3669 // can be squeezed into the alignment gap. Contended fields are obviously
3670 // exempt from that.
3671 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3672 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3673 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3674 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3675 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3676
3677 // Total non-static fields count, including every contended field
3678 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3679 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3680 fac->count[NONSTATIC_OOP];
3681
3682 const bool super_has_nonstatic_fields =
3683 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3684 const bool has_nonstatic_fields =
3685 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3686
3687
3688 // Prepare list of oops for oop map generation.
3689 //
3690 // "offset" and "count" lists are describing the set of contiguous oop
3691 // regions. offset[i] is the start of the i-th region, which then has
3692 // count[i] oops following. Before we know how many regions are required,
3693 // we pessimistically allocate the maps to fit all the oops into the
3694 // distinct regions.
3695 //
3696 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3697 // to figure out if we still need to do this.
3698 unsigned int nonstatic_oop_map_count = 0;
3699 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3700
3701 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3702 THREAD, int, max_nonstatic_oop_maps);
3703 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3704 THREAD, unsigned int, max_nonstatic_oop_maps);
3705
3706 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3707
3708 bool compact_fields = CompactFields;
3709 int allocation_style = FieldsAllocationStyle;
3710 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3711 assert(false, "0 <= FieldsAllocationStyle <= 2");
3712 allocation_style = 1; // Optimistic
3713 }
3714
3715 // The next classes have predefined hard-coded fields offsets
3716 // (see in JavaClasses::compute_hard_coded_offsets()).
3717 // Use default fields allocation order for them.
3718 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3719 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3720 _class_name == vmSymbols::java_lang_Class() ||
3721 _class_name == vmSymbols::java_lang_ClassLoader() ||
3722 _class_name == vmSymbols::java_lang_ref_Reference() ||
3723 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3724 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3725 _class_name == vmSymbols::java_lang_String() ||
3726 _class_name == vmSymbols::java_lang_Throwable() ||
3727 _class_name == vmSymbols::java_lang_Boolean() ||
3728 _class_name == vmSymbols::java_lang_Character() ||
3729 _class_name == vmSymbols::java_lang_Float() ||
3730 _class_name == vmSymbols::java_lang_Double() ||
3731 _class_name == vmSymbols::java_lang_Byte() ||
3732 _class_name == vmSymbols::java_lang_Short() ||
3733 _class_name == vmSymbols::java_lang_Integer() ||
3734 _class_name == vmSymbols::java_lang_Long())) {
3735 allocation_style = 0; // Allocate oops first
3736 compact_fields = false; // Don't compact fields
3737 }
3738
3739 int next_nonstatic_oop_offset = 0;
3740 int next_nonstatic_double_offset = 0;
3741
3742 // Rearrange fields for a given allocation style
3743 if( allocation_style == 0 ) {
3744 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3745 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3746 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3747 (nonstatic_oop_count * heapOopSize);
3748 } else if( allocation_style == 1 ) {
3749 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3750 next_nonstatic_double_offset = next_nonstatic_field_offset;
3751 } else if( allocation_style == 2 ) {
3752 // Fields allocation: oops fields in super and sub classes are together.
3753 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3754 _super_klass->nonstatic_oop_map_size() > 0 ) {
3755 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3756 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3757 const OopMapBlock* const last_map = first_map + map_count - 1;
3758 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3759 if (next_offset == next_nonstatic_field_offset) {
3760 allocation_style = 0; // allocate oops first
3761 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3762 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3763 (nonstatic_oop_count * heapOopSize);
3764 }
3765 }
3766 if( allocation_style == 2 ) {
3767 allocation_style = 1; // allocate oops last
3768 next_nonstatic_double_offset = next_nonstatic_field_offset;
3769 }
3770 } else {
3771 ShouldNotReachHere();
3772 }
3773
3774 int nonstatic_oop_space_count = 0;
3775 int nonstatic_word_space_count = 0;
3776 int nonstatic_short_space_count = 0;
3777 int nonstatic_byte_space_count = 0;
3778 int nonstatic_oop_space_offset = 0;
3779 int nonstatic_word_space_offset = 0;
3780 int nonstatic_short_space_offset = 0;
3781 int nonstatic_byte_space_offset = 0;
3782
3783 // Try to squeeze some of the fields into the gaps due to
3784 // long/double alignment.
3785 if (nonstatic_double_count > 0) {
3786 int offset = next_nonstatic_double_offset;
3787 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3788 if (compact_fields && offset != next_nonstatic_double_offset) {
3789 // Allocate available fields into the gap before double field.
3790 int length = next_nonstatic_double_offset - offset;
3791 assert(length == BytesPerInt, "");
3792 nonstatic_word_space_offset = offset;
3793 if (nonstatic_word_count > 0) {
3794 nonstatic_word_count -= 1;
3795 nonstatic_word_space_count = 1; // Only one will fit
3796 length -= BytesPerInt;
3797 offset += BytesPerInt;
3798 }
3799 nonstatic_short_space_offset = offset;
3800 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3801 nonstatic_short_count -= 1;
3802 nonstatic_short_space_count += 1;
3803 length -= BytesPerShort;
3804 offset += BytesPerShort;
3805 }
3806 nonstatic_byte_space_offset = offset;
3807 while (length > 0 && nonstatic_byte_count > 0) {
3808 nonstatic_byte_count -= 1;
3809 nonstatic_byte_space_count += 1;
3810 length -= 1;
3811 }
3812 // Allocate oop field in the gap if there are no other fields for that.
3813 nonstatic_oop_space_offset = offset;
3814 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3815 allocation_style != 0) { // when oop fields not first
3816 nonstatic_oop_count -= 1;
3817 nonstatic_oop_space_count = 1; // Only one will fit
3818 length -= heapOopSize;
3819 offset += heapOopSize;
3820 }
3821 }
3822 }
3823
3824 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3825 (nonstatic_double_count * BytesPerLong);
3826 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3827 (nonstatic_word_count * BytesPerInt);
3828 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3829 (nonstatic_short_count * BytesPerShort);
3830 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3831 nonstatic_byte_count;
3832
3833 // let oops jump before padding with this allocation style
3834 if( allocation_style == 1 ) {
3835 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3836 if( nonstatic_oop_count > 0 ) {
3837 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3838 }
3839 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3840 }
3841
3842 // Iterate over fields again and compute correct offsets.
3843 // The field allocation type was temporarily stored in the offset slot.
3844 // oop fields are located before non-oop fields (static and non-static).
3845 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3846
3847 // skip already laid out fields
3848 if (fs.is_offset_set()) continue;
3849
3850 // contended instance fields are handled below
3851 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3852
3853 int real_offset = 0;
3854 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3855
3856 // pack the rest of the fields
3857 switch (atype) {
3858 case STATIC_OOP:
3859 real_offset = next_static_oop_offset;
3860 next_static_oop_offset += heapOopSize;
3861 break;
3862 case STATIC_BYTE:
3863 real_offset = next_static_byte_offset;
3864 next_static_byte_offset += 1;
3865 break;
3866 case STATIC_SHORT:
3867 real_offset = next_static_short_offset;
3868 next_static_short_offset += BytesPerShort;
3869 break;
3870 case STATIC_WORD:
3871 real_offset = next_static_word_offset;
3872 next_static_word_offset += BytesPerInt;
3873 break;
3874 case STATIC_DOUBLE:
3875 real_offset = next_static_double_offset;
3876 next_static_double_offset += BytesPerLong;
3877 break;
3878 case NONSTATIC_OOP:
3879 if( nonstatic_oop_space_count > 0 ) {
3880 real_offset = nonstatic_oop_space_offset;
3881 nonstatic_oop_space_offset += heapOopSize;
3882 nonstatic_oop_space_count -= 1;
3883 } else {
3884 real_offset = next_nonstatic_oop_offset;
3885 next_nonstatic_oop_offset += heapOopSize;
3886 }
3887
3888 // Record this oop in the oop maps
3889 if( nonstatic_oop_map_count > 0 &&
3890 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3891 real_offset -
3892 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3893 heapOopSize ) {
3894 // This oop is adjacent to the previous one, add to current oop map
3895 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3896 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3897 } else {
3898 // This oop is not adjacent to the previous one, create new oop map
3899 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3900 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3901 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3902 nonstatic_oop_map_count += 1;
3903 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3904 first_nonstatic_oop_offset = real_offset;
3905 }
3906 }
3907 break;
3908 case NONSTATIC_BYTE:
3909 if( nonstatic_byte_space_count > 0 ) {
3910 real_offset = nonstatic_byte_space_offset;
3911 nonstatic_byte_space_offset += 1;
3912 nonstatic_byte_space_count -= 1;
3913 } else {
3914 real_offset = next_nonstatic_byte_offset;
3915 next_nonstatic_byte_offset += 1;
3916 }
3917 break;
3918 case NONSTATIC_SHORT:
3919 if( nonstatic_short_space_count > 0 ) {
3920 real_offset = nonstatic_short_space_offset;
3921 nonstatic_short_space_offset += BytesPerShort;
3922 nonstatic_short_space_count -= 1;
3923 } else {
3924 real_offset = next_nonstatic_short_offset;
3925 next_nonstatic_short_offset += BytesPerShort;
3926 }
3927 break;
3928 case NONSTATIC_WORD:
3929 if( nonstatic_word_space_count > 0 ) {
3930 real_offset = nonstatic_word_space_offset;
3931 nonstatic_word_space_offset += BytesPerInt;
3932 nonstatic_word_space_count -= 1;
3933 } else {
3934 real_offset = next_nonstatic_word_offset;
3935 next_nonstatic_word_offset += BytesPerInt;
3936 }
3937 break;
3938 case NONSTATIC_DOUBLE:
3939 real_offset = next_nonstatic_double_offset;
3940 next_nonstatic_double_offset += BytesPerLong;
3941 break;
3942 default:
3943 ShouldNotReachHere();
3944 }
3945 fs.set_offset(real_offset);
3946 }
3947
3948
3949 // Handle the contended cases.
3950 //
3951 // Each contended field should not intersect the cache line with another contended field.
3952 // In the absence of alignment information, we end up with pessimistically separating
3953 // the fields with full-width padding.
3954 //
3955 // Additionally, this should not break alignment for the fields, so we round the alignment up
3956 // for each field.
3957 if (nonstatic_contended_count > 0) {
3958
3959 // if there is at least one contended field, we need to have pre-padding for them
3960 next_nonstatic_padded_offset += ContendedPaddingWidth;
3961
3962 // collect all contended groups
3963 ResourceBitMap bm(cp->size());
3964 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3965 // skip already laid out fields
3966 if (fs.is_offset_set()) continue;
3967
3968 if (fs.is_contended()) {
3969 bm.set_bit(fs.contended_group());
3970 }
3971 }
3972
3973 int current_group = -1;
3974 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3975
3976 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3977
3978 // skip already laid out fields
3979 if (fs.is_offset_set()) continue;
3980
3981 // skip non-contended fields and fields from different group
3982 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3983
3984 // handle statics below
3985 if (fs.access_flags().is_static()) continue;
3986
3987 int real_offset = 0;
3988 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3989
3990 switch (atype) {
3991 case NONSTATIC_BYTE:
3992 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3993 real_offset = next_nonstatic_padded_offset;
3994 next_nonstatic_padded_offset += 1;
3995 break;
3996
3997 case NONSTATIC_SHORT:
3998 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
3999 real_offset = next_nonstatic_padded_offset;
4000 next_nonstatic_padded_offset += BytesPerShort;
4001 break;
4002
4003 case NONSTATIC_WORD:
4004 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4005 real_offset = next_nonstatic_padded_offset;
4006 next_nonstatic_padded_offset += BytesPerInt;
4007 break;
4008
4009 case NONSTATIC_DOUBLE:
4010 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4011 real_offset = next_nonstatic_padded_offset;
4012 next_nonstatic_padded_offset += BytesPerLong;
4013 break;
4014
4015 case NONSTATIC_OOP:
4016 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4017 real_offset = next_nonstatic_padded_offset;
4018 next_nonstatic_padded_offset += heapOopSize;
4019
4020 // Record this oop in the oop maps
4021 if( nonstatic_oop_map_count > 0 &&
4022 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4023 real_offset -
4024 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4025 heapOopSize ) {
4026 // This oop is adjacent to the previous one, add to current oop map
4027 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4028 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4029 } else {
4030 // This oop is not adjacent to the previous one, create new oop map
4031 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4032 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4033 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4034 nonstatic_oop_map_count += 1;
4035 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4036 first_nonstatic_oop_offset = real_offset;
4037 }
4038 }
4039 break;
4040
4041 default:
4042 ShouldNotReachHere();
4043 }
4044
4045 if (fs.contended_group() == 0) {
4046 // Contended group defines the equivalence class over the fields:
4047 // the fields within the same contended group are not inter-padded.
4048 // The only exception is default group, which does not incur the
4049 // equivalence, and so requires intra-padding.
4050 next_nonstatic_padded_offset += ContendedPaddingWidth;
4051 }
4052
4053 fs.set_offset(real_offset);
4054 } // for
4055
4056 // Start laying out the next group.
4057 // Note that this will effectively pad the last group in the back;
4058 // this is expected to alleviate memory contention effects for
4059 // subclass fields and/or adjacent object.
4060 // If this was the default group, the padding is already in place.
4061 if (current_group != 0) {
4062 next_nonstatic_padded_offset += ContendedPaddingWidth;
4063 }
4064 }
4065
4066 // handle static fields
4067 }
4068
4069 // Entire class is contended, pad in the back.
4070 // This helps to alleviate memory contention effects for subclass fields
4071 // and/or adjacent object.
4072 if (is_contended_class) {
4073 next_nonstatic_padded_offset += ContendedPaddingWidth;
4074 }
4075
4076 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4077
4078 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4079 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4080 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4081
4082 int static_field_size = (static_fields_end -
4083 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4084 nonstatic_field_size = nonstatic_field_size +
4085 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4086
4087 int instance_size = align_object_size(instance_end / wordSize);
4088
4089 assert(instance_size == align_object_size(align_size_up(
4090 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4091 wordSize) / wordSize), "consistent layout helper value");
4092
4093 // Invariant: nonstatic_field end/start should only change if there are
4094 // nonstatic fields in the class, or if the class is contended. We compare
4095 // against the non-aligned value, so that end alignment will not fail the
4096 // assert without actually having the fields.
4097 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4098 is_contended_class ||
4099 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4100
4101 // Number of non-static oop map blocks allocated at end of klass.
4102 const unsigned int total_oop_map_count =
4103 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4104 first_nonstatic_oop_offset);
4105
4106 #ifndef PRODUCT
4107 if (PrintFieldLayout) {
4108 print_field_layout(_class_name,
4109 _fields,
4110 cp,
4111 instance_size,
4112 nonstatic_fields_start,
4113 nonstatic_fields_end,
4114 static_fields_end);
4115 }
4116
4117 #endif
4118 // Pass back information needed for InstanceKlass creation
4119 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4120 info->nonstatic_oop_counts = nonstatic_oop_counts;
4121 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4122 info->total_oop_map_count = total_oop_map_count;
4123 info->instance_size = instance_size;
4124 info->static_field_size = static_field_size;
4125 info->nonstatic_field_size = nonstatic_field_size;
4126 info->has_nonstatic_fields = has_nonstatic_fields;
4127 }
4128
4129 static void fill_oop_maps(const InstanceKlass* k,
4130 unsigned int nonstatic_oop_map_count,
4131 const int* nonstatic_oop_offsets,
4132 const unsigned int* nonstatic_oop_counts) {
4133
4134 assert(k != NULL, "invariant");
4135
4136 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4137 const InstanceKlass* const super = k->superklass();
4138 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4139 if (super_count > 0) {
4140 // Copy maps from superklass
4141 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4142 for (unsigned int i = 0; i < super_count; ++i) {
4143 *this_oop_map++ = *super_oop_map++;
4144 }
4145 }
4146
4147 if (nonstatic_oop_map_count > 0) {
4148 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4149 // The counts differ because there is no gap between superklass's last oop
4150 // field and the first local oop field. Extend the last oop map copied
4151 // from the superklass instead of creating new one.
4152 nonstatic_oop_map_count--;
4153 nonstatic_oop_offsets++;
4154 this_oop_map--;
4155 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4156 this_oop_map++;
4157 }
4158
4159 // Add new map blocks, fill them
4160 while (nonstatic_oop_map_count-- > 0) {
4161 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4162 this_oop_map->set_count(*nonstatic_oop_counts++);
4163 this_oop_map++;
4164 }
4165 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4166 this_oop_map, "sanity");
4167 }
4168 }
4169
4170
4171 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4172 assert(ik != NULL, "invariant");
4173
4174 const Klass* const super = ik->super();
4175
4176 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4177 // in which case we don't have to register objects as finalizable
4178 if (!_has_empty_finalizer) {
4179 if (_has_finalizer ||
4180 (super != NULL && super->has_finalizer())) {
4181 ik->set_has_finalizer();
4182 }
4183 }
4184
4185 #ifdef ASSERT
4186 bool f = false;
4187 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4188 vmSymbols::void_method_signature());
4189 if (m != NULL && !m->is_empty_method()) {
4190 f = true;
4191 }
4192
4193 // Spec doesn't prevent agent from redefinition of empty finalizer.
4194 // Despite the fact that it's generally bad idea and redefined finalizer
4195 // will not work as expected we shouldn't abort vm in this case
4196 if (!ik->has_redefined_this_or_super()) {
4197 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4198 }
4199 #endif
4200
4201 // Check if this klass supports the java.lang.Cloneable interface
4202 if (SystemDictionary::Cloneable_klass_loaded()) {
4203 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4204 ik->set_is_cloneable();
4205 }
4206 }
4207
4208 // Check if this klass has a vanilla default constructor
4209 if (super == NULL) {
4210 // java.lang.Object has empty default constructor
4211 ik->set_has_vanilla_constructor();
4212 } else {
4213 if (super->has_vanilla_constructor() &&
4214 _has_vanilla_constructor) {
4215 ik->set_has_vanilla_constructor();
4216 }
4217 #ifdef ASSERT
4218 bool v = false;
4219 if (super->has_vanilla_constructor()) {
4220 const Method* const constructor =
4221 ik->find_method(vmSymbols::object_initializer_name(),
4222 vmSymbols::void_method_signature());
4223 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4224 v = true;
4225 }
4226 }
4227 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4228 #endif
4229 }
4230
4231 // If it cannot be fast-path allocated, set a bit in the layout helper.
4232 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4233 assert(ik->size_helper() > 0, "layout_helper is initialized");
4234 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4235 || ik->is_abstract() || ik->is_interface()
4236 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4237 || ik->size_helper() >= FastAllocateSizeLimit) {
4238 // Forbid fast-path allocation.
4239 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4240 ik->set_layout_helper(lh);
4241 }
4242 }
4243
4244 // Attach super classes and interface classes to class loader data
4245 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4246 TRAPS) {
4247 assert(defined_klass != NULL, "invariant");
4248
4249 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4250 if (defining_loader_data->is_the_null_class_loader_data()) {
4251 // Dependencies to null class loader data are implicit.
4252 return;
4253 } else {
4254 // add super class dependency
4255 Klass* const super = defined_klass->super();
4256 if (super != NULL) {
4257 defining_loader_data->record_dependency(super, CHECK);
4258 }
4259
4260 // add super interface dependencies
4261 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4262 if (local_interfaces != NULL) {
4263 const int length = local_interfaces->length();
4264 for (int i = 0; i < length; i++) {
4265 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4266 }
4267 }
4268 }
4269 }
4270
4271 // utility methods for appending an array with check for duplicates
4272
4273 static void append_interfaces(GrowableArray<Klass*>* result,
4274 const Array<Klass*>* const ifs) {
4275 // iterate over new interfaces
4276 for (int i = 0; i < ifs->length(); i++) {
4277 Klass* const e = ifs->at(i);
4278 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4279 // add new interface
4280 result->append_if_missing(e);
4281 }
4282 }
4283
4284 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4285 Array<Klass*>* local_ifs,
4286 ClassLoaderData* loader_data,
4287 TRAPS) {
4288 assert(local_ifs != NULL, "invariant");
4289 assert(loader_data != NULL, "invariant");
4290
4291 // Compute maximum size for transitive interfaces
4292 int max_transitive_size = 0;
4293 int super_size = 0;
4294 // Add superclass transitive interfaces size
4295 if (super != NULL) {
4296 super_size = super->transitive_interfaces()->length();
4297 max_transitive_size += super_size;
4298 }
4299 // Add local interfaces' super interfaces
4300 const int local_size = local_ifs->length();
4301 for (int i = 0; i < local_size; i++) {
4302 Klass* const l = local_ifs->at(i);
4303 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4304 }
4305 // Finally add local interfaces
4306 max_transitive_size += local_size;
4307 // Construct array
4308 if (max_transitive_size == 0) {
4309 // no interfaces, use canonicalized array
4310 return Universe::the_empty_klass_array();
4311 } else if (max_transitive_size == super_size) {
4312 // no new local interfaces added, share superklass' transitive interface array
4313 return super->transitive_interfaces();
4314 } else if (max_transitive_size == local_size) {
4315 // only local interfaces added, share local interface array
4316 return local_ifs;
4317 } else {
4318 ResourceMark rm;
4319 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4320
4321 // Copy down from superclass
4322 if (super != NULL) {
4323 append_interfaces(result, super->transitive_interfaces());
4324 }
4325
4326 // Copy down from local interfaces' superinterfaces
4327 for (int i = 0; i < local_size; i++) {
4328 Klass* const l = local_ifs->at(i);
4329 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4330 }
4331 // Finally add local interfaces
4332 append_interfaces(result, local_ifs);
4333
4334 // length will be less than the max_transitive_size if duplicates were removed
4335 const int length = result->length();
4336 assert(length <= max_transitive_size, "just checking");
4337 Array<Klass*>* const new_result =
4338 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4339 for (int i = 0; i < length; i++) {
4340 Klass* const e = result->at(i);
4341 assert(e != NULL, "just checking");
4342 new_result->at_put(i, e);
4343 }
4344 return new_result;
4345 }
4346 }
4347
4348 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4349 assert(this_klass != NULL, "invariant");
4350 const Klass* const super = this_klass->super();
4351 if (super != NULL) {
4352 Reflection::VerifyClassAccessResults vca_result =
4353 Reflection::verify_class_access(this_klass, super, false);
4354 if (vca_result != Reflection::ACCESS_OK) {
4355 ResourceMark rm(THREAD);
4356 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result);
4357 if (msg == NULL) {
4358 ResourceMark rm(THREAD);
4359 Exceptions::fthrow(
4360 THREAD_AND_LOCATION,
4361 vmSymbols::java_lang_IllegalAccessError(),
4362 "class %s cannot access its superclass %s",
4363 this_klass->external_name(),
4364 super->external_name());
4365 } else {
4366 // Add additional message content.
4367 Exceptions::fthrow(
4368 THREAD_AND_LOCATION,
4369 vmSymbols::java_lang_IllegalAccessError(),
4370 "superclass access check failed: %s",
4371 msg);
4372 }
4373 }
4374 }
4375 }
4376
4377
4378 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4379 assert(this_klass != NULL, "invariant");
4380 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4381 const int lng = local_interfaces->length();
4382 for (int i = lng - 1; i >= 0; i--) {
4383 Klass* const k = local_interfaces->at(i);
4384 assert (k != NULL && k->is_interface(), "invalid interface");
4385 Reflection::VerifyClassAccessResults vca_result =
4386 Reflection::verify_class_access(this_klass, k, false);
4387 if (vca_result != Reflection::ACCESS_OK) {
4388 ResourceMark rm(THREAD);
4389 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result);
4390 if (msg == NULL) {
4391 Exceptions::fthrow(
4392 THREAD_AND_LOCATION,
4393 vmSymbols::java_lang_IllegalAccessError(),
4394 "class %s cannot access its superinterface %s",
4395 this_klass->external_name(),
4396 k->external_name());
4397 } else {
4398 // Add additional message content.
4399 Exceptions::fthrow(
4400 THREAD_AND_LOCATION,
4401 vmSymbols::java_lang_IllegalAccessError(),
4402 "superinterface check failed: %s",
4403 msg);
4404 }
4405 }
4406 }
4407 }
4408
4409
4410 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4411 assert(this_klass != NULL, "invariant");
4412 const Array<Method*>* const methods = this_klass->methods();
4413 const int num_methods = methods->length();
4414
4415 // go thru each method and check if it overrides a final method
4416 for (int index = 0; index < num_methods; index++) {
4417 const Method* const m = methods->at(index);
4418
4419 // skip private, static, and <init> methods
4420 if ((!m->is_private() && !m->is_static()) &&
4421 (m->name() != vmSymbols::object_initializer_name())) {
4422
4423 const Symbol* const name = m->name();
4424 const Symbol* const signature = m->signature();
4425 const Klass* k = this_klass->super();
4426 const Method* super_m = NULL;
4427 while (k != NULL) {
4428 // skip supers that don't have final methods.
4429 if (k->has_final_method()) {
4430 // lookup a matching method in the super class hierarchy
4431 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4432 if (super_m == NULL) {
4433 break; // didn't find any match; get out
4434 }
4435
4436 if (super_m->is_final() && !super_m->is_static() &&
4437 // matching method in super is final, and not static
4438 (Reflection::verify_field_access(this_klass,
4439 super_m->method_holder(),
4440 super_m->method_holder(),
4441 super_m->access_flags(), false))
4442 // this class can access super final method and therefore override
4443 ) {
4444 ResourceMark rm(THREAD);
4445 Exceptions::fthrow(
4446 THREAD_AND_LOCATION,
4447 vmSymbols::java_lang_VerifyError(),
4448 "class %s overrides final method %s.%s%s",
4449 this_klass->external_name(),
4450 super_m->method_holder()->external_name(),
4451 name->as_C_string(),
4452 signature->as_C_string()
4453 );
4454 return;
4455 }
4456
4457 // continue to look from super_m's holder's super.
4458 k = super_m->method_holder()->super();
4459 continue;
4460 }
4461
4462 k = k->super();
4463 }
4464 }
4465 }
4466 }
4467
4468
4469 // assumes that this_klass is an interface
4470 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4471 assert(this_klass != NULL, "invariant");
4472 assert(this_klass->is_interface(), "not an interface");
4473 const Array<Method*>* methods = this_klass->methods();
4474 const int num_methods = methods->length();
4475
4476 for (int index = 0; index < num_methods; index++) {
4477 const Method* const m = methods->at(index);
4478 // if m is static and not the init method, throw a verify error
4479 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4480 ResourceMark rm(THREAD);
4481 Exceptions::fthrow(
4482 THREAD_AND_LOCATION,
4483 vmSymbols::java_lang_VerifyError(),
4484 "Illegal static method %s in interface %s",
4485 m->name()->as_C_string(),
4486 this_klass->external_name()
4487 );
4488 return;
4489 }
4490 }
4491 }
4492
4493 // utility methods for format checking
4494
4495 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4496 if (!_need_verify) { return; }
4497
4498 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4499 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4500 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4501 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4502 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4503 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4504 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0;
4505 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4506
4507 if ((is_abstract && is_final) ||
4508 (is_interface && !is_abstract) ||
4509 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4510 (!is_interface && major_gte_15 && is_annotation) ||
4511 is_module_info) {
4512 ResourceMark rm(THREAD);
4513 Exceptions::fthrow(
4514 THREAD_AND_LOCATION,
4515 vmSymbols::java_lang_ClassFormatError(),
4516 "Illegal class modifiers in class %s: 0x%X",
4517 _class_name->as_C_string(), flags
4518 );
4519 return;
4520 }
4521 }
4522
4523 static bool has_illegal_visibility(jint flags) {
4524 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4525 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4526 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4527
4528 return ((is_public && is_protected) ||
4529 (is_public && is_private) ||
4530 (is_protected && is_private));
4531 }
4532
4533 static bool is_supported_version(u2 major, u2 minor){
4534 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4535 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4536 (major <= max_version) &&
4537 ((major != max_version) ||
4538 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4539 }
4540
4541 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4542 bool is_interface,
4543 TRAPS) const {
4544 if (!_need_verify) { return; }
4545
4546 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4547 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4548 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4549 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4550 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4551 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4552 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4553 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4554 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4555
4556 bool is_illegal = false;
4557
4558 if (is_interface) {
4559 if (!is_public || !is_static || !is_final || is_private ||
4560 is_protected || is_volatile || is_transient ||
4561 (major_gte_15 && is_enum)) {
4562 is_illegal = true;
4563 }
4564 } else { // not interface
4565 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4566 is_illegal = true;
4567 }
4568 }
4569
4570 if (is_illegal) {
4571 ResourceMark rm(THREAD);
4572 Exceptions::fthrow(
4573 THREAD_AND_LOCATION,
4574 vmSymbols::java_lang_ClassFormatError(),
4575 "Illegal field modifiers in class %s: 0x%X",
4576 _class_name->as_C_string(), flags);
4577 return;
4578 }
4579 }
4580
4581 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4582 bool is_interface,
4583 const Symbol* name,
4584 TRAPS) const {
4585 if (!_need_verify) { return; }
4586
4587 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4588 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4589 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4590 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4591 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4592 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4593 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4594 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4595 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4596 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4597 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4598 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4599 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4600
4601 bool is_illegal = false;
4602
4603 if (is_interface) {
4604 if (major_gte_8) {
4605 // Class file version is JAVA_8_VERSION or later Methods of
4606 // interfaces may set any of the flags except ACC_PROTECTED,
4607 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4608 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4609 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4610 (is_native || is_protected || is_final || is_synchronized) ||
4611 // If a specific method of a class or interface has its
4612 // ACC_ABSTRACT flag set, it must not have any of its
4613 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4614 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4615 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4616 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4617 (is_abstract && (is_private || is_static || is_strict))) {
4618 is_illegal = true;
4619 }
4620 } else if (major_gte_15) {
4621 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4622 if (!is_public || is_private || is_protected || is_static || is_final ||
4623 is_synchronized || is_native || !is_abstract || is_strict) {
4624 is_illegal = true;
4625 }
4626 } else {
4627 // Class file version is pre-JAVA_1_5_VERSION
4628 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4629 is_illegal = true;
4630 }
4631 }
4632 } else { // not interface
4633 if (has_illegal_visibility(flags)) {
4634 is_illegal = true;
4635 } else {
4636 if (is_initializer) {
4637 if (is_static || is_final || is_synchronized || is_native ||
4638 is_abstract || (major_gte_15 && is_bridge)) {
4639 is_illegal = true;
4640 }
4641 } else { // not initializer
4642 if (is_abstract) {
4643 if ((is_final || is_native || is_private || is_static ||
4644 (major_gte_15 && (is_synchronized || is_strict)))) {
4645 is_illegal = true;
4646 }
4647 }
4648 }
4649 }
4650 }
4651
4652 if (is_illegal) {
4653 ResourceMark rm(THREAD);
4654 Exceptions::fthrow(
4655 THREAD_AND_LOCATION,
4656 vmSymbols::java_lang_ClassFormatError(),
4657 "Method %s in class %s has illegal modifiers: 0x%X",
4658 name->as_C_string(), _class_name->as_C_string(), flags);
4659 return;
4660 }
4661 }
4662
4663 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4664 int length,
4665 TRAPS) const {
4666 assert(_need_verify, "only called when _need_verify is true");
4667 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4668 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4669 }
4670 }
4671
4672 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4673 // In class names, '/' separates unqualified names. This is verified in this function also.
4674 // Method names also may not contain the characters '<' or '>', unless <init>
4675 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4676 // method. Because these names have been checked as special cases before
4677 // calling this method in verify_legal_method_name.
4678 //
4679 // This method is also called from the modular system APIs in modules.cpp
4680 // to verify the validity of module and package names.
4681 bool ClassFileParser::verify_unqualified_name(const char* name,
4682 unsigned int length,
4683 int type) {
4684 for (const char* p = name; p != name + length;) {
4685 jchar ch = *p;
4686 if (ch < 128) {
4687 if (ch == '.') {
4688 // permit '.' in module names unless it's the first char, or
4689 // preceding char is also a '.', or last char is a '.'.
4690 if ((type != ClassFileParser::LegalModule) ||
4691 (p == name) || (*(p-1) == '.') ||
4692 (p == name + length - 1)) {
4693 return false;
4694 }
4695 }
4696 if (ch == ';' || ch == '[' ) {
4697 return false; // do not permit '.', ';', or '['
4698 }
4699 if (ch == '/') {
4700 // check for '//' or leading or trailing '/' which are not legal
4701 // unqualified name must not be empty
4702 if (type == ClassFileParser::LegalClass) {
4703 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4704 return false;
4705 }
4706 } else {
4707 return false; // do not permit '/' unless it's class name
4708 }
4709 }
4710 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4711 return false; // do not permit '<' or '>' in method names
4712 }
4713 p++;
4714 } else {
4715 char* tmp_p = UTF8::next(p, &ch);
4716 p = tmp_p;
4717 }
4718 }
4719 return true;
4720 }
4721
4722 // Take pointer to a string. Skip over the longest part of the string that could
4723 // be taken as a fieldname. Allow '/' if slash_ok is true.
4724 // Return a pointer to just past the fieldname.
4725 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4726 // being true, we saw consecutive slashes (meaning we were looking for a
4727 // qualified path but found something that was badly-formed).
4728 static const char* skip_over_field_name(const char* name,
4729 bool slash_ok,
4730 unsigned int length) {
4731 const char* p;
4732 jboolean last_is_slash = false;
4733 jboolean not_first_ch = false;
4734
4735 for (p = name; p != name + length; not_first_ch = true) {
4736 const char* old_p = p;
4737 jchar ch = *p;
4738 if (ch < 128) {
4739 p++;
4740 // quick check for ascii
4741 if ((ch >= 'a' && ch <= 'z') ||
4742 (ch >= 'A' && ch <= 'Z') ||
4743 (ch == '_' || ch == '$') ||
4744 (not_first_ch && ch >= '0' && ch <= '9')) {
4745 last_is_slash = false;
4746 continue;
4747 }
4748 if (slash_ok && ch == '/') {
4749 if (last_is_slash) {
4750 return NULL; // Don't permit consecutive slashes
4751 }
4752 last_is_slash = true;
4753 continue;
4754 }
4755 }
4756 else {
4757 jint unicode_ch;
4758 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4759 p = tmp_p;
4760 last_is_slash = false;
4761 // Check if ch is Java identifier start or is Java identifier part
4762 // 4672820: call java.lang.Character methods directly without generating separate tables.
4763 EXCEPTION_MARK;
4764
4765 // return value
4766 JavaValue result(T_BOOLEAN);
4767 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4768 JavaCallArguments args;
4769 args.push_int(unicode_ch);
4770
4771 // public static boolean isJavaIdentifierStart(char ch);
4772 JavaCalls::call_static(&result,
4773 SystemDictionary::Character_klass(),
4774 vmSymbols::isJavaIdentifierStart_name(),
4775 vmSymbols::int_bool_signature(),
4776 &args,
4777 THREAD);
4778
4779 if (HAS_PENDING_EXCEPTION) {
4780 CLEAR_PENDING_EXCEPTION;
4781 return 0;
4782 }
4783 if (result.get_jboolean()) {
4784 continue;
4785 }
4786
4787 if (not_first_ch) {
4788 // public static boolean isJavaIdentifierPart(char ch);
4789 JavaCalls::call_static(&result,
4790 SystemDictionary::Character_klass(),
4791 vmSymbols::isJavaIdentifierPart_name(),
4792 vmSymbols::int_bool_signature(),
4793 &args,
4794 THREAD);
4795
4796 if (HAS_PENDING_EXCEPTION) {
4797 CLEAR_PENDING_EXCEPTION;
4798 return 0;
4799 }
4800
4801 if (result.get_jboolean()) {
4802 continue;
4803 }
4804 }
4805 }
4806 return (not_first_ch) ? old_p : NULL;
4807 }
4808 return (not_first_ch) ? p : NULL;
4809 }
4810
4811 // Take pointer to a string. Skip over the longest part of the string that could
4812 // be taken as a field signature. Allow "void" if void_ok.
4813 // Return a pointer to just past the signature.
4814 // Return NULL if no legal signature is found.
4815 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4816 bool void_ok,
4817 unsigned int length,
4818 TRAPS) const {
4819 unsigned int array_dim = 0;
4820 while (length > 0) {
4821 switch (signature[0]) {
4822 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4823 case JVM_SIGNATURE_BOOLEAN:
4824 case JVM_SIGNATURE_BYTE:
4825 case JVM_SIGNATURE_CHAR:
4826 case JVM_SIGNATURE_SHORT:
4827 case JVM_SIGNATURE_INT:
4828 case JVM_SIGNATURE_FLOAT:
4829 case JVM_SIGNATURE_LONG:
4830 case JVM_SIGNATURE_DOUBLE:
4831 return signature + 1;
4832 case JVM_SIGNATURE_CLASS: {
4833 if (_major_version < JAVA_1_5_VERSION) {
4834 // Skip over the class name if one is there
4835 const char* const p = skip_over_field_name(signature + 1, true, --length);
4836
4837 // The next character better be a semicolon
4838 if (p && (p - signature) > 1 && p[0] == ';') {
4839 return p + 1;
4840 }
4841 }
4842 else {
4843 // Skip leading 'L' and ignore first appearance of ';'
4844 length--;
4845 signature++;
4846 char* c = strchr((char*) signature, ';');
4847 // Format check signature
4848 if (c != NULL) {
4849 int newlen = c - (char*) signature;
4850 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4851 strncpy(sig, signature, newlen);
4852 sig[newlen] = '\0';
4853
4854 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4855 if (!legal) {
4856 ResourceMark rm(THREAD);
4857 classfile_parse_error("Class name contains illegal character "
4858 "in descriptor in class file %s",
4859 CHECK_0);
4860 return NULL;
4861 }
4862 return signature + newlen + 1;
4863 }
4864 }
4865 return NULL;
4866 }
4867 case JVM_SIGNATURE_ARRAY:
4868 array_dim++;
4869 if (array_dim > 255) {
4870 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4871 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4872 }
4873 // The rest of what's there better be a legal signature
4874 signature++;
4875 length--;
4876 void_ok = false;
4877 break;
4878 default:
4879 return NULL;
4880 }
4881 }
4882 return NULL;
4883 }
4884
4885 // Checks if name is a legal class name.
4886 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4887 if (!_need_verify || _relax_verify) { return; }
4888
4889 char buf[fixed_buffer_size];
4890 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4891 unsigned int length = name->utf8_length();
4892 bool legal = false;
4893
4894 if (length > 0) {
4895 const char* p;
4896 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4897 p = skip_over_field_signature(bytes, false, length, CHECK);
4898 legal = (p != NULL) && ((p - bytes) == (int)length);
4899 } else if (_major_version < JAVA_1_5_VERSION) {
4900 if (bytes[0] != '<') {
4901 p = skip_over_field_name(bytes, true, length);
4902 legal = (p != NULL) && ((p - bytes) == (int)length);
4903 }
4904 } else {
4905 // 4900761: relax the constraints based on JSR202 spec
4906 // Class names may be drawn from the entire Unicode character set.
4907 // Identifiers between '/' must be unqualified names.
4908 // The utf8 string has been verified when parsing cpool entries.
4909 legal = verify_unqualified_name(bytes, length, LegalClass);
4910 }
4911 }
4912 if (!legal) {
4913 ResourceMark rm(THREAD);
4914 assert(_class_name != NULL, "invariant");
4915 Exceptions::fthrow(
4916 THREAD_AND_LOCATION,
4917 vmSymbols::java_lang_ClassFormatError(),
4918 "Illegal class name \"%s\" in class file %s", bytes,
4919 _class_name->as_C_string()
4920 );
4921 return;
4922 }
4923 }
4924
4925 // Checks if name is a legal field name.
4926 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4927 if (!_need_verify || _relax_verify) { return; }
4928
4929 char buf[fixed_buffer_size];
4930 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4931 unsigned int length = name->utf8_length();
4932 bool legal = false;
4933
4934 if (length > 0) {
4935 if (_major_version < JAVA_1_5_VERSION) {
4936 if (bytes[0] != '<') {
4937 const char* p = skip_over_field_name(bytes, false, length);
4938 legal = (p != NULL) && ((p - bytes) == (int)length);
4939 }
4940 } else {
4941 // 4881221: relax the constraints based on JSR202 spec
4942 legal = verify_unqualified_name(bytes, length, LegalField);
4943 }
4944 }
4945
4946 if (!legal) {
4947 ResourceMark rm(THREAD);
4948 assert(_class_name != NULL, "invariant");
4949 Exceptions::fthrow(
4950 THREAD_AND_LOCATION,
4951 vmSymbols::java_lang_ClassFormatError(),
4952 "Illegal field name \"%s\" in class %s", bytes,
4953 _class_name->as_C_string()
4954 );
4955 return;
4956 }
4957 }
4958
4959 // Checks if name is a legal method name.
4960 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4961 if (!_need_verify || _relax_verify) { return; }
4962
4963 assert(name != NULL, "method name is null");
4964 char buf[fixed_buffer_size];
4965 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4966 unsigned int length = name->utf8_length();
4967 bool legal = false;
4968
4969 if (length > 0) {
4970 if (bytes[0] == '<') {
4971 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4972 legal = true;
4973 }
4974 } else if (_major_version < JAVA_1_5_VERSION) {
4975 const char* p;
4976 p = skip_over_field_name(bytes, false, length);
4977 legal = (p != NULL) && ((p - bytes) == (int)length);
4978 } else {
4979 // 4881221: relax the constraints based on JSR202 spec
4980 legal = verify_unqualified_name(bytes, length, LegalMethod);
4981 }
4982 }
4983
4984 if (!legal) {
4985 ResourceMark rm(THREAD);
4986 assert(_class_name != NULL, "invariant");
4987 Exceptions::fthrow(
4988 THREAD_AND_LOCATION,
4989 vmSymbols::java_lang_ClassFormatError(),
4990 "Illegal method name \"%s\" in class %s", bytes,
4991 _class_name->as_C_string()
4992 );
4993 return;
4994 }
4995 }
4996
4997
4998 // Checks if signature is a legal field signature.
4999 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5000 const Symbol* signature,
5001 TRAPS) const {
5002 if (!_need_verify) { return; }
5003
5004 char buf[fixed_buffer_size];
5005 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5006 const unsigned int length = signature->utf8_length();
5007 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5008
5009 if (p == NULL || (p - bytes) != (int)length) {
5010 throwIllegalSignature("Field", name, signature, CHECK);
5011 }
5012 }
5013
5014 // Checks if signature is a legal method signature.
5015 // Returns number of parameters
5016 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5017 const Symbol* signature,
5018 TRAPS) const {
5019 if (!_need_verify) {
5020 // make sure caller's args_size will be less than 0 even for non-static
5021 // method so it will be recomputed in compute_size_of_parameters().
5022 return -2;
5023 }
5024
5025 // Class initializers cannot have args for class format version >= 51.
5026 if (name == vmSymbols::class_initializer_name() &&
5027 signature != vmSymbols::void_method_signature() &&
5028 _major_version >= JAVA_7_VERSION) {
5029 throwIllegalSignature("Method", name, signature, CHECK_0);
5030 return 0;
5031 }
5032
5033 unsigned int args_size = 0;
5034 char buf[fixed_buffer_size];
5035 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5036 unsigned int length = signature->utf8_length();
5037 const char* nextp;
5038
5039 // The first character must be a '('
5040 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5041 length--;
5042 // Skip over legal field signatures
5043 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5044 while ((length > 0) && (nextp != NULL)) {
5045 args_size++;
5046 if (p[0] == 'J' || p[0] == 'D') {
5047 args_size++;
5048 }
5049 length -= nextp - p;
5050 p = nextp;
5051 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5052 }
5053 // The first non-signature thing better be a ')'
5054 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5055 length--;
5056 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5057 // All internal methods must return void
5058 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5059 return args_size;
5060 }
5061 } else {
5062 // Now we better just have a return value
5063 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5064 if (nextp && ((int)length == (nextp - p))) {
5065 return args_size;
5066 }
5067 }
5068 }
5069 }
5070 // Report error
5071 throwIllegalSignature("Method", name, signature, CHECK_0);
5072 return 0;
5073 }
5074
5075 int ClassFileParser::static_field_size() const {
5076 assert(_field_info != NULL, "invariant");
5077 return _field_info->static_field_size;
5078 }
5079
5080 int ClassFileParser::total_oop_map_count() const {
5081 assert(_field_info != NULL, "invariant");
5082 return _field_info->total_oop_map_count;
5083 }
5084
5085 jint ClassFileParser::layout_size() const {
5086 assert(_field_info != NULL, "invariant");
5087 return _field_info->instance_size;
5088 }
5089
5090 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5091 const Array<Method*>* methods) {
5092 assert(ik != NULL, "invariant");
5093 assert(methods != NULL, "invariant");
5094
5095 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5096 // (We used to do this lazily, but now we query it in Rewriter,
5097 // which is eagerly done for every method, so we might as well do it now,
5098 // when everything is fresh in memory.)
5099 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5100
5101 if (klass_id != vmSymbols::NO_SID) {
5102 for (int j = 0; j < methods->length(); ++j) {
5103 Method* method = methods->at(j);
5104 method->init_intrinsic_id();
5105
5106 if (CheckIntrinsics) {
5107 // Check if an intrinsic is defined for method 'method',
5108 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5109 if (method->intrinsic_id() != vmIntrinsics::_none &&
5110 !method->intrinsic_candidate()) {
5111 tty->print("Compiler intrinsic is defined for method [%s], "
5112 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5113 method->name_and_sig_as_C_string(),
5114 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5115 );
5116 tty->cr();
5117 DEBUG_ONLY(vm_exit(1));
5118 }
5119 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5120 // but there is no intrinsic available for it.
5121 if (method->intrinsic_candidate() &&
5122 method->intrinsic_id() == vmIntrinsics::_none) {
5123 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5124 "but no compiler intrinsic is defined for the method.%s",
5125 method->name_and_sig_as_C_string(),
5126 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5127 );
5128 tty->cr();
5129 DEBUG_ONLY(vm_exit(1));
5130 }
5131 }
5132 } // end for
5133
5134 #ifdef ASSERT
5135 if (CheckIntrinsics) {
5136 // Check for orphan methods in the current class. A method m
5137 // of a class C is orphan if an intrinsic is defined for method m,
5138 // but class C does not declare m.
5139 // The check is potentially expensive, therefore it is available
5140 // only in debug builds.
5141
5142 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5143 if (vmIntrinsics::_compiledLambdaForm == id) {
5144 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5145 // generated for the JVM from a LambdaForm and therefore no method
5146 // is defined for it.
5147 continue;
5148 }
5149
5150 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5151 // Check if the current class contains a method with the same
5152 // name, flags, signature.
5153 bool match = false;
5154 for (int j = 0; j < methods->length(); ++j) {
5155 const Method* method = methods->at(j);
5156 if (method->intrinsic_id() == id) {
5157 match = true;
5158 break;
5159 }
5160 }
5161
5162 if (!match) {
5163 char buf[1000];
5164 tty->print("Compiler intrinsic is defined for method [%s], "
5165 "but the method is not available in class [%s].%s",
5166 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5167 buf, sizeof(buf)),
5168 ik->name()->as_C_string(),
5169 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5170 );
5171 tty->cr();
5172 DEBUG_ONLY(vm_exit(1));
5173 }
5174 }
5175 } // end for
5176 } // CheckIntrinsics
5177 #endif // ASSERT
5178 }
5179 }
5180
5181 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5182 if (_klass != NULL) {
5183 return _klass;
5184 }
5185
5186 InstanceKlass* const ik =
5187 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5188
5189 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5190
5191 assert(_klass == ik, "invariant");
5192
5193 return ik;
5194 }
5195
5196 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5197 assert(ik != NULL, "invariant");
5198
5199 set_klass_to_deallocate(ik);
5200
5201 assert(_field_info != NULL, "invariant");
5202 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5203 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5204 "sanity");
5205
5206 assert(ik->is_instance_klass(), "sanity");
5207 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5208
5209 // Fill in information already parsed
5210 ik->set_should_verify_class(_need_verify);
5211
5212 // Not yet: supers are done below to support the new subtype-checking fields
5213 ik->set_class_loader_data(_loader_data);
5214 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5215 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5216 assert(_fac != NULL, "invariant");
5217 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5218
5219 // this transfers ownership of a lot of arrays from
5220 // the parser onto the InstanceKlass*
5221 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5222
5223 // note that is not safe to use the fields in the parser from this point on
5224 assert(NULL == _cp, "invariant");
5225 assert(NULL == _fields, "invariant");
5226 assert(NULL == _methods, "invariant");
5227 assert(NULL == _inner_classes, "invariant");
5228 assert(NULL == _local_interfaces, "invariant");
5229 assert(NULL == _transitive_interfaces, "invariant");
5230 assert(NULL == _combined_annotations, "invariant");
5231
5232 if (_has_final_method) {
5233 ik->set_has_final_method();
5234 }
5235
5236 ik->copy_method_ordering(_method_ordering, CHECK);
5237 // The InstanceKlass::_methods_jmethod_ids cache
5238 // is managed on the assumption that the initial cache
5239 // size is equal to the number of methods in the class. If
5240 // that changes, then InstanceKlass::idnum_can_increment()
5241 // has to be changed accordingly.
5242 ik->set_initial_method_idnum(ik->methods()->length());
5243
5244 ik->set_name(_class_name);
5245
5246 if (is_anonymous()) {
5247 // I am well known to myself
5248 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5249 }
5250
5251 ik->set_minor_version(_minor_version);
5252 ik->set_major_version(_major_version);
5253 ik->set_has_default_methods(_has_default_methods);
5254 ik->set_declares_default_methods(_declares_default_methods);
5255
5256 if (_host_klass != NULL) {
5257 assert (ik->is_anonymous(), "should be the same");
5258 ik->set_host_klass(_host_klass);
5259 }
5260
5261 // Set PackageEntry for this_klass
5262 oop cl = ik->class_loader();
5263 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5264 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5265 ik->set_package(cld, CHECK);
5266
5267 const Array<Method*>* const methods = ik->methods();
5268 assert(methods != NULL, "invariant");
5269 const int methods_len = methods->length();
5270
5271 check_methods_for_intrinsics(ik, methods);
5272
5273 // Fill in field values obtained by parse_classfile_attributes
5274 if (_parsed_annotations->has_any_annotations()) {
5275 _parsed_annotations->apply_to(ik);
5276 }
5277
5278 apply_parsed_class_attributes(ik);
5279
5280 // Miranda methods
5281 if ((_num_miranda_methods > 0) ||
5282 // if this class introduced new miranda methods or
5283 (_super_klass != NULL && _super_klass->has_miranda_methods())
5284 // super class exists and this class inherited miranda methods
5285 ) {
5286 ik->set_has_miranda_methods(); // then set a flag
5287 }
5288
5289 // Fill in information needed to compute superclasses.
5290 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5291
5292 // Initialize itable offset tables
5293 klassItable::setup_itable_offset_table(ik);
5294
5295 // Compute transitive closure of interfaces this class implements
5296 // Do final class setup
5297 fill_oop_maps(ik,
5298 _field_info->nonstatic_oop_map_count,
5299 _field_info->nonstatic_oop_offsets,
5300 _field_info->nonstatic_oop_counts);
5301
5302 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5303 set_precomputed_flags(ik);
5304
5305 // check if this class can access its super class
5306 check_super_class_access(ik, CHECK);
5307
5308 // check if this class can access its superinterfaces
5309 check_super_interface_access(ik, CHECK);
5310
5311 // check if this class overrides any final method
5312 check_final_method_override(ik, CHECK);
5313
5314 // check that if this class is an interface then it doesn't have static methods
5315 if (ik->is_interface()) {
5316 /* An interface in a JAVA 8 classfile can be static */
5317 if (_major_version < JAVA_8_VERSION) {
5318 check_illegal_static_method(ik, CHECK);
5319 }
5320 }
5321
5322 // Obtain this_klass' module entry
5323 ModuleEntry* module_entry = ik->module();
5324 assert(module_entry != NULL, "module_entry should always be set");
5325
5326 // Obtain java.lang.reflect.Module
5327 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5328
5329 // Allocate mirror and initialize static fields
5330 // The create_mirror() call will also call compute_modifiers()
5331 java_lang_Class::create_mirror(ik,
5332 _loader_data->class_loader(),
5333 module_handle,
5334 _protection_domain,
5335 CHECK);
5336
5337 assert(_all_mirandas != NULL, "invariant");
5338
5339 // Generate any default methods - default methods are interface methods
5340 // that have a default implementation. This is new with Lambda project.
5341 if (_has_default_methods ) {
5342 DefaultMethods::generate_default_methods(ik,
5343 _all_mirandas,
5344 CHECK);
5345 }
5346
5347 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5348 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5349 !module_entry->has_default_read_edges()) {
5350 if (!module_entry->set_has_default_read_edges()) {
5351 // We won a potential race
5352 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5353 }
5354 }
5355
5356 // Update the loader_data graph.
5357 record_defined_class_dependencies(ik, CHECK);
5358
5359 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5360
5361 if (!is_internal()) {
5362 if (log_is_enabled(Info, class, load)) {
5363 ResourceMark rm;
5364 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5365
5366 if (log_is_enabled(Info, class, load)) {
5367 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5368 }
5369 // No 'else' here as logging levels are not mutually exclusive
5370 if (log_is_enabled(Debug, class, load)) {
5371 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5372 }
5373 }
5374
5375 if (log_is_enabled(Debug, class, resolve)) {
5376 ResourceMark rm;
5377 // print out the superclass.
5378 const char * from = ik->external_name();
5379 if (ik->java_super() != NULL) {
5380 log_debug(class, resolve)("%s %s (super)",
5381 from,
5382 ik->java_super()->external_name());
5383 }
5384 // print out each of the interface classes referred to by this class.
5385 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5386 if (local_interfaces != NULL) {
5387 const int length = local_interfaces->length();
5388 for (int i = 0; i < length; i++) {
5389 const Klass* const k = local_interfaces->at(i);
5390 const char * to = k->external_name();
5391 log_debug(class, resolve)("%s %s (interface)", from, to);
5392 }
5393 }
5394 }
5395 }
5396
5397 TRACE_INIT_KLASS_ID(ik);
5398
5399 // If we reach here, all is well.
5400 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5401 // in order for it to not be destroyed in the ClassFileParser destructor.
5402 set_klass_to_deallocate(NULL);
5403
5404 // it's official
5405 set_klass(ik);
5406
5407 debug_only(ik->verify();)
5408 }
5409
5410 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5411 Symbol* name,
5412 ClassLoaderData* loader_data,
5413 Handle protection_domain,
5414 const Klass* host_klass,
5415 GrowableArray<Handle>* cp_patches,
5416 Publicity pub_level,
5417 TRAPS) :
5418 _stream(stream),
5419 _requested_name(name),
5420 _loader_data(loader_data),
5421 _host_klass(host_klass),
5422 _cp_patches(cp_patches),
5423 _super_klass(),
5424 _cp(NULL),
5425 _fields(NULL),
5426 _methods(NULL),
5427 _inner_classes(NULL),
5428 _local_interfaces(NULL),
5429 _transitive_interfaces(NULL),
5430 _combined_annotations(NULL),
5431 _annotations(NULL),
5432 _type_annotations(NULL),
5433 _fields_annotations(NULL),
5434 _fields_type_annotations(NULL),
5435 _klass(NULL),
5436 _klass_to_deallocate(NULL),
5437 _parsed_annotations(NULL),
5438 _fac(NULL),
5439 _field_info(NULL),
5440 _method_ordering(NULL),
5441 _all_mirandas(NULL),
5442 _vtable_size(0),
5443 _itable_size(0),
5444 _num_miranda_methods(0),
5445 _rt(REF_NONE),
5446 _protection_domain(protection_domain),
5447 _access_flags(),
5448 _pub_level(pub_level),
5449 _synthetic_flag(false),
5450 _sde_length(false),
5451 _sde_buffer(NULL),
5452 _sourcefile_index(0),
5453 _generic_signature_index(0),
5454 _major_version(0),
5455 _minor_version(0),
5456 _this_class_index(0),
5457 _super_class_index(0),
5458 _itfs_len(0),
5459 _java_fields_count(0),
5460 _need_verify(false),
5461 _relax_verify(false),
5462 _has_default_methods(false),
5463 _declares_default_methods(false),
5464 _has_final_method(false),
5465 _has_finalizer(false),
5466 _has_empty_finalizer(false),
5467 _has_vanilla_constructor(false),
5468 _max_bootstrap_specifier_index(-1) {
5469
5470 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5471
5472 assert(THREAD->is_Java_thread(), "invariant");
5473 assert(_loader_data != NULL, "invariant");
5474 assert(stream != NULL, "invariant");
5475 assert(_stream != NULL, "invariant");
5476 assert(_stream->buffer() == _stream->current(), "invariant");
5477 assert(_class_name != NULL, "invariant");
5478 assert(0 == _access_flags.as_int(), "invariant");
5479
5480 // Figure out whether we can skip format checking (matching classic VM behavior)
5481 if (DumpSharedSpaces) {
5482 // verify == true means it's a 'remote' class (i.e., non-boot class)
5483 // Verification decision is based on BytecodeVerificationRemote flag
5484 // for those classes.
5485 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5486 BytecodeVerificationLocal;
5487 }
5488 else {
5489 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5490 stream->need_verify());
5491 }
5492
5493 // synch back verification state to stream
5494 stream->set_verify(_need_verify);
5495
5496 // Check if verification needs to be relaxed for this class file
5497 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5498 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader());
5499
5500 parse_stream(stream, CHECK);
5501
5502 post_process_parsed_stream(stream, _cp, CHECK);
5503 }
5504
5505 void ClassFileParser::clear_class_metadata() {
5506 // metadata created before the instance klass is created. Must be
5507 // deallocated if classfile parsing returns an error.
5508 _cp = NULL;
5509 _fields = NULL;
5510 _methods = NULL;
5511 _inner_classes = NULL;
5512 _local_interfaces = NULL;
5513 _transitive_interfaces = NULL;
5514 _combined_annotations = NULL;
5515 _annotations = _type_annotations = NULL;
5516 _fields_annotations = _fields_type_annotations = NULL;
5517 }
5518
5519 // Destructor to clean up
5520 ClassFileParser::~ClassFileParser() {
5521 if (_cp != NULL) {
5522 MetadataFactory::free_metadata(_loader_data, _cp);
5523 }
5524 if (_fields != NULL) {
5525 MetadataFactory::free_array<u2>(_loader_data, _fields);
5526 }
5527
5528 if (_methods != NULL) {
5529 // Free methods
5530 InstanceKlass::deallocate_methods(_loader_data, _methods);
5531 }
5532
5533 // beware of the Universe::empty_blah_array!!
5534 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5535 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5536 }
5537
5538 // Free interfaces
5539 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5540 _local_interfaces, _transitive_interfaces);
5541
5542 if (_combined_annotations != NULL) {
5543 // After all annotations arrays have been created, they are installed into the
5544 // Annotations object that will be assigned to the InstanceKlass being created.
5545
5546 // Deallocate the Annotations object and the installed annotations arrays.
5547 _combined_annotations->deallocate_contents(_loader_data);
5548
5549 // If the _combined_annotations pointer is non-NULL,
5550 // then the other annotations fields should have been cleared.
5551 assert(_annotations == NULL, "Should have been cleared");
5552 assert(_type_annotations == NULL, "Should have been cleared");
5553 assert(_fields_annotations == NULL, "Should have been cleared");
5554 assert(_fields_type_annotations == NULL, "Should have been cleared");
5555 } else {
5556 // If the annotations arrays were not installed into the Annotations object,
5557 // then they have to be deallocated explicitly.
5558 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5559 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5560 Annotations::free_contents(_loader_data, _fields_annotations);
5561 Annotations::free_contents(_loader_data, _fields_type_annotations);
5562 }
5563
5564 clear_class_metadata();
5565
5566 // deallocate the klass if already created. Don't directly deallocate, but add
5567 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5568 // at a safepoint.
5569 if (_klass_to_deallocate != NULL) {
5570 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5571 }
5572 }
5573
5574 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5575 TRAPS) {
5576
5577 assert(stream != NULL, "invariant");
5578 assert(_class_name != NULL, "invariant");
5579
5580 // BEGIN STREAM PARSING
5581 stream->guarantee_more(8, CHECK); // magic, major, minor
5582 // Magic value
5583 const u4 magic = stream->get_u4_fast();
5584 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5585 "Incompatible magic value %u in class file %s",
5586 magic, CHECK);
5587
5588 // Version numbers
5589 _minor_version = stream->get_u2_fast();
5590 _major_version = stream->get_u2_fast();
5591
5592 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5593 ResourceMark rm;
5594 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5595 _major_version, _minor_version, _class_name->as_C_string());
5596 Exceptions::fthrow(
5597 THREAD_AND_LOCATION,
5598 vmSymbols::java_lang_UnsupportedClassVersionError(),
5599 "Unsupported major.minor version for dump time %u.%u",
5600 _major_version,
5601 _minor_version);
5602 }
5603
5604 // Check version numbers - we check this even with verifier off
5605 if (!is_supported_version(_major_version, _minor_version)) {
5606 ResourceMark rm(THREAD);
5607 Exceptions::fthrow(
5608 THREAD_AND_LOCATION,
5609 vmSymbols::java_lang_UnsupportedClassVersionError(),
5610 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5611 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5612 _class_name->as_C_string(),
5613 _major_version,
5614 _minor_version,
5615 JAVA_MAX_SUPPORTED_VERSION,
5616 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5617 return;
5618 }
5619
5620 stream->guarantee_more(3, CHECK); // length, first cp tag
5621 const u2 cp_size = stream->get_u2_fast();
5622
5623 guarantee_property(
5624 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5625 cp_size, CHECK);
5626
5627 _cp = ConstantPool::allocate(_loader_data,
5628 cp_size,
5629 CHECK);
5630
5631 ConstantPool* const cp = _cp;
5632
5633 parse_constant_pool(stream, cp, cp_size, CHECK);
5634
5635 assert(cp_size == (const u2)cp->length(), "invariant");
5636
5637 // ACCESS FLAGS
5638 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5639
5640 // Access flags
5641 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5642
5643 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5644 // Set abstract bit for old class files for backward compatibility
5645 flags |= JVM_ACC_ABSTRACT;
5646 }
5647
5648 _access_flags.set_flags(flags);
5649
5650 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5651
5652 // This class and superclass
5653 _this_class_index = stream->get_u2_fast();
5654 check_property(
5655 valid_cp_range(_this_class_index, cp_size) &&
5656 cp->tag_at(_this_class_index).is_unresolved_klass(),
5657 "Invalid this class index %u in constant pool in class file %s",
5658 _this_class_index, CHECK);
5659
5660 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5661 assert(class_name_in_cp != NULL, "class_name can't be null");
5662
5663 // Update _class_name which could be null previously
5664 // to reflect the name in the constant pool
5665 _class_name = class_name_in_cp;
5666
5667 // Don't need to check whether this class name is legal or not.
5668 // It has been checked when constant pool is parsed.
5669 // However, make sure it is not an array type.
5670 if (_need_verify) {
5671 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5672 "Bad class name in class file %s",
5673 CHECK);
5674 }
5675
5676 // Checks if name in class file matches requested name
5677 if (_requested_name != NULL && _requested_name != _class_name) {
5678 ResourceMark rm(THREAD);
5679 Exceptions::fthrow(
5680 THREAD_AND_LOCATION,
5681 vmSymbols::java_lang_NoClassDefFoundError(),
5682 "%s (wrong name: %s)",
5683 _class_name->as_C_string(),
5684 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5685 );
5686 return;
5687 }
5688
5689 // Verification prevents us from creating names with dots in them, this
5690 // asserts that that's the case.
5691 assert(is_internal_format(_class_name), "external class name format used internally");
5692
5693 if (!is_internal()) {
5694 if (log_is_enabled(Debug, class, preorder)){
5695 ResourceMark rm(THREAD);
5696 outputStream* log = Log(class, preorder)::debug_stream();
5697 log->print("%s", _class_name->as_klass_external_name());
5698 if (stream->source() != NULL) {
5699 log->print(" source: %s", stream->source());
5700 }
5701 log->cr();
5702 }
5703
5704 #if INCLUDE_CDS
5705 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5706 // Only dump the classes that can be stored into CDS archive.
5707 // Anonymous classes such as generated LambdaForm classes are also not included.
5708 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5709 _host_klass == NULL) {
5710 ResourceMark rm(THREAD);
5711 classlist_file->print_cr("%s", _class_name->as_C_string());
5712 classlist_file->flush();
5713 }
5714 }
5715 #endif
5716 }
5717
5718 // SUPERKLASS
5719 _super_class_index = stream->get_u2_fast();
5720 _super_klass = parse_super_class(cp,
5721 _super_class_index,
5722 _need_verify,
5723 CHECK);
5724
5725 // Interfaces
5726 _itfs_len = stream->get_u2_fast();
5727 parse_interfaces(stream,
5728 _itfs_len,
5729 cp,
5730 &_has_default_methods,
5731 CHECK);
5732
5733 assert(_local_interfaces != NULL, "invariant");
5734
5735 // Fields (offsets are filled in later)
5736 _fac = new FieldAllocationCount();
5737 parse_fields(stream,
5738 _access_flags.is_interface(),
5739 _fac,
5740 cp,
5741 cp_size,
5742 &_java_fields_count,
5743 CHECK);
5744
5745 assert(_fields != NULL, "invariant");
5746
5747 // Methods
5748 AccessFlags promoted_flags;
5749 parse_methods(stream,
5750 _access_flags.is_interface(),
5751 &promoted_flags,
5752 &_has_final_method,
5753 &_declares_default_methods,
5754 CHECK);
5755
5756 assert(_methods != NULL, "invariant");
5757
5758 // promote flags from parse_methods() to the klass' flags
5759 _access_flags.add_promoted_flags(promoted_flags.as_int());
5760
5761 if (_declares_default_methods) {
5762 _has_default_methods = true;
5763 }
5764
5765 // Additional attributes/annotations
5766 _parsed_annotations = new ClassAnnotationCollector();
5767 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5768
5769 assert(_inner_classes != NULL, "invariant");
5770
5771 // Finalize the Annotations metadata object,
5772 // now that all annotation arrays have been created.
5773 create_combined_annotations(CHECK);
5774
5775 // Make sure this is the end of class file stream
5776 guarantee_property(stream->at_eos(),
5777 "Extra bytes at the end of class file %s",
5778 CHECK);
5779
5780 // all bytes in stream read and parsed
5781 }
5782
5783 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5784 ConstantPool* cp,
5785 TRAPS) {
5786 assert(stream != NULL, "invariant");
5787 assert(stream->at_eos(), "invariant");
5788 assert(cp != NULL, "invariant");
5789 assert(_loader_data != NULL, "invariant");
5790
5791 // We check super class after class file is parsed and format is checked
5792 if (_super_class_index > 0 && NULL ==_super_klass) {
5793 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5794 if (_access_flags.is_interface()) {
5795 // Before attempting to resolve the superclass, check for class format
5796 // errors not checked yet.
5797 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5798 "Interfaces must have java.lang.Object as superclass in class file %s",
5799 CHECK);
5800 }
5801 _super_klass = (const InstanceKlass*)
5802 SystemDictionary::resolve_super_or_fail(_class_name,
5803 super_class_name,
5804 _loader_data->class_loader(),
5805 _protection_domain,
5806 true,
5807 CHECK);
5808 }
5809
5810 if (_super_klass != NULL) {
5811 if (_super_klass->has_default_methods()) {
5812 _has_default_methods = true;
5813 }
5814
5815 if (_super_klass->is_interface()) {
5816 ResourceMark rm(THREAD);
5817 Exceptions::fthrow(
5818 THREAD_AND_LOCATION,
5819 vmSymbols::java_lang_IncompatibleClassChangeError(),
5820 "class %s has interface %s as super class",
5821 _class_name->as_klass_external_name(),
5822 _super_klass->external_name()
5823 );
5824 return;
5825 }
5826 // Make sure super class is not final
5827 if (_super_klass->is_final()) {
5828 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5829 }
5830 }
5831
5832 // Compute the transitive list of all unique interfaces implemented by this class
5833 _transitive_interfaces =
5834 compute_transitive_interfaces(_super_klass,
5835 _local_interfaces,
5836 _loader_data,
5837 CHECK);
5838
5839 assert(_transitive_interfaces != NULL, "invariant");
5840
5841 // sort methods
5842 _method_ordering = sort_methods(_methods);
5843
5844 _all_mirandas = new GrowableArray<Method*>(20);
5845
5846 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5847 &_num_miranda_methods,
5848 _all_mirandas,
5849 _super_klass,
5850 _methods,
5851 _access_flags,
5852 _major_version,
5853 _loader_data->class_loader(),
5854 _class_name,
5855 _local_interfaces,
5856 CHECK);
5857
5858 // Size of Java itable (in words)
5859 _itable_size = _access_flags.is_interface() ? 0 :
5860 klassItable::compute_itable_size(_transitive_interfaces);
5861
5862 assert(_fac != NULL, "invariant");
5863 assert(_parsed_annotations != NULL, "invariant");
5864
5865 _field_info = new FieldLayoutInfo();
5866 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5867
5868 // Compute reference typ
5869 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5870
5871 }
5872
5873 void ClassFileParser::set_klass(InstanceKlass* klass) {
5874
5875 #ifdef ASSERT
5876 if (klass != NULL) {
5877 assert(NULL == _klass, "leaking?");
5878 }
5879 #endif
5880
5881 _klass = klass;
5882 }
5883
5884 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5885
5886 #ifdef ASSERT
5887 if (klass != NULL) {
5888 assert(NULL == _klass_to_deallocate, "leaking?");
5889 }
5890 #endif
5891
5892 _klass_to_deallocate = klass;
5893 }
5894
5895 // Caller responsible for ResourceMark
5896 // clone stream with rewound position
5897 const ClassFileStream* ClassFileParser::clone_stream() const {
5898 assert(_stream != NULL, "invariant");
5899
5900 return _stream->clone();
5901 }
5902 // ----------------------------------------------------------------------------
5903 // debugging
5904
5905 #ifdef ASSERT
5906
5907 // return true if class_name contains no '.' (internal format is '/')
5908 bool ClassFileParser::is_internal_format(Symbol* class_name) {
5909 if (class_name != NULL) {
5910 ResourceMark rm;
5911 char* name = class_name->as_C_string();
5912 return strchr(name, '.') == NULL;
5913 } else {
5914 return true;
5915 }
5916 }
5917
5918 #endif