1 /*
2 * Copyright (c) 1997, 2015, 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/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/verificationType.hpp"
34 #include "classfile/verifier.hpp"
35 #include "classfile/vmSymbols.hpp"
36 #include "gc/shared/gcLocker.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/metadataFactory.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/annotations.hpp"
43 #include "oops/fieldStreams.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceMirrorKlass.hpp"
46 #include "oops/klass.inline.hpp"
47 #include "oops/klassVtable.hpp"
48 #include "oops/metadata.hpp"
49 #include "oops/method.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "prims/jvm.h"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/jvmtiThreadState.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/perfData.hpp"
57 #include "runtime/reflection.hpp"
58 #include "runtime/signature.hpp"
59 #include "runtime/timer.hpp"
60 #include "services/classLoadingService.hpp"
61 #include "services/threadService.hpp"
62 #include "trace/traceMacros.hpp"
63 #include "utilities/array.hpp"
64 #include "utilities/exceptions.hpp"
65 #include "utilities/globalDefinitions.hpp"
66 #include "utilities/macros.hpp"
67 #include "utilities/ostream.hpp"
68 #include "utilities/resourceHash.hpp"
69 #if INCLUDE_CDS
70 #include "classfile/systemDictionaryShared.hpp"
71 #endif
72
73 // We generally try to create the oops directly when parsing, rather than
74 // allocating temporary data structures and copying the bytes twice. A
75 // temporary area is only needed when parsing utf8 entries in the constant
76 // pool and when parsing line number tables.
77
78 // We add assert in debug mode when class format is not checked.
79
80 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
81 #define JAVA_MIN_SUPPORTED_VERSION 45
82 #define JAVA_MAX_SUPPORTED_VERSION 52
83 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
84
85 // Used for two backward compatibility reasons:
86 // - to check for new additions to the class file format in JDK1.5
87 // - to check for bug fixes in the format checker in JDK1.5
88 #define JAVA_1_5_VERSION 49
89
90 // Used for backward compatibility reasons:
91 // - to check for javac bug fixes that happened after 1.5
92 // - also used as the max version when running in jdk6
93 #define JAVA_6_VERSION 50
94
95 // Used for backward compatibility reasons:
96 // - to check NameAndType_info signatures more aggressively
97 // - to disallow argument and require ACC_STATIC for <clinit> methods
98 #define JAVA_7_VERSION 51
99
100 // Extension method support.
101 #define JAVA_8_VERSION 52
102
103 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
104
105 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
106 ConstantPool* cp,
107 const int length,
108 TRAPS) {
109 assert(stream != NULL, "invariant");
110 assert(cp != NULL, "invariant");
111
112 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
113 // this function (_current can be allocated in a register, with scalar
114 // replacement of aggregates). The _current pointer is copied back to
115 // stream() when this function returns. DON'T call another method within
116 // this method that uses stream().
117 const ClassFileStream cfs1 = *stream;
118 const ClassFileStream* const cfs = &cfs1;
119
120 assert(cfs->allocated_on_stack(), "should be local");
121 debug_only(const u1* const old_current = stream->current();)
122
123 // Used for batching symbol allocations.
124 const char* names[SymbolTable::symbol_alloc_batch_size];
125 int lengths[SymbolTable::symbol_alloc_batch_size];
126 int indices[SymbolTable::symbol_alloc_batch_size];
127 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
128 int names_count = 0;
129
130 // parsing Index 0 is unused
131 for (int index = 1; index < length; index++) {
132 // Each of the following case guarantees one more byte in the stream
133 // for the following tag or the access_flags following constant pool,
134 // so we don't need bounds-check for reading tag.
135 const u1 tag = cfs->get_u1_fast();
136 switch (tag) {
137 case JVM_CONSTANT_Class : {
138 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
139 const u2 name_index = cfs->get_u2_fast();
140 cp->klass_index_at_put(index, name_index);
141 break;
142 }
143 case JVM_CONSTANT_Fieldref: {
144 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
145 const u2 class_index = cfs->get_u2_fast();
146 const u2 name_and_type_index = cfs->get_u2_fast();
147 cp->field_at_put(index, class_index, name_and_type_index);
148 break;
149 }
150 case JVM_CONSTANT_Methodref: {
151 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
152 const u2 class_index = cfs->get_u2_fast();
153 const u2 name_and_type_index = cfs->get_u2_fast();
154 cp->method_at_put(index, class_index, name_and_type_index);
155 break;
156 }
157 case JVM_CONSTANT_InterfaceMethodref: {
158 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
159 const u2 class_index = cfs->get_u2_fast();
160 const u2 name_and_type_index = cfs->get_u2_fast();
161 cp->interface_method_at_put(index, class_index, name_and_type_index);
162 break;
163 }
164 case JVM_CONSTANT_String : {
165 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
166 const u2 string_index = cfs->get_u2_fast();
167 cp->string_index_at_put(index, string_index);
168 break;
169 }
170 case JVM_CONSTANT_MethodHandle :
171 case JVM_CONSTANT_MethodType: {
172 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
173 classfile_parse_error(
174 "Class file version does not support constant tag %u in class file %s",
175 tag, CHECK);
176 }
177 if (tag == JVM_CONSTANT_MethodHandle) {
178 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
179 const u1 ref_kind = cfs->get_u1_fast();
180 const u2 method_index = cfs->get_u2_fast();
181 cp->method_handle_index_at_put(index, ref_kind, method_index);
182 }
183 else if (tag == JVM_CONSTANT_MethodType) {
184 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
185 const u2 signature_index = cfs->get_u2_fast();
186 cp->method_type_index_at_put(index, signature_index);
187 }
188 else {
189 ShouldNotReachHere();
190 }
191 break;
192 }
193 case JVM_CONSTANT_InvokeDynamic : {
194 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
195 classfile_parse_error(
196 "Class file version does not support constant tag %u in class file %s",
197 tag, CHECK);
198 }
199 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
200 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
201 const u2 name_and_type_index = cfs->get_u2_fast();
202 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
203 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
204 }
205 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
206 break;
207 }
208 case JVM_CONSTANT_Integer: {
209 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
210 const u4 bytes = cfs->get_u4_fast();
211 cp->int_at_put(index, (jint)bytes);
212 break;
213 }
214 case JVM_CONSTANT_Float: {
215 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
216 const u4 bytes = cfs->get_u4_fast();
217 cp->float_at_put(index, *(jfloat*)&bytes);
218 break;
219 }
220 case JVM_CONSTANT_Long: {
221 // A mangled type might cause you to overrun allocated memory
222 guarantee_property(index + 1 < length,
223 "Invalid constant pool entry %u in class file %s",
224 index,
225 CHECK);
226 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
227 const u8 bytes = cfs->get_u8_fast();
228 cp->long_at_put(index, bytes);
229 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
230 break;
231 }
232 case JVM_CONSTANT_Double: {
233 // A mangled type might cause you to overrun allocated memory
234 guarantee_property(index+1 < length,
235 "Invalid constant pool entry %u in class file %s",
236 index,
237 CHECK);
238 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
239 const u8 bytes = cfs->get_u8_fast();
240 cp->double_at_put(index, *(jdouble*)&bytes);
241 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
242 break;
243 }
244 case JVM_CONSTANT_NameAndType: {
245 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
246 const u2 name_index = cfs->get_u2_fast();
247 const u2 signature_index = cfs->get_u2_fast();
248 cp->name_and_type_at_put(index, name_index, signature_index);
249 break;
250 }
251 case JVM_CONSTANT_Utf8 : {
252 cfs->guarantee_more(2, CHECK); // utf8_length
253 u2 utf8_length = cfs->get_u2_fast();
254 const u1* utf8_buffer = cfs->get_u1_buffer();
255 assert(utf8_buffer != NULL, "null utf8 buffer");
256 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
257 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
258 cfs->skip_u1_fast(utf8_length);
259
260 // Before storing the symbol, make sure it's legal
261 if (_need_verify) {
262 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
263 }
264
265 if (has_cp_patch_at(index)) {
266 Handle patch = clear_cp_patch_at(index);
267 guarantee_property(java_lang_String::is_instance(patch()),
268 "Illegal utf8 patch at %d in class file %s",
269 index,
270 CHECK);
271 const char* const str = java_lang_String::as_utf8_string(patch());
272 // (could use java_lang_String::as_symbol instead, but might as well batch them)
273 utf8_buffer = (const u1*) str;
274 utf8_length = (int) strlen(str);
275 }
276
277 unsigned int hash;
278 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
279 utf8_length,
280 hash);
281 if (result == NULL) {
282 names[names_count] = (const char*)utf8_buffer;
283 lengths[names_count] = utf8_length;
284 indices[names_count] = index;
285 hashValues[names_count++] = hash;
286 if (names_count == SymbolTable::symbol_alloc_batch_size) {
287 SymbolTable::new_symbols(_loader_data,
288 cp,
289 names_count,
290 names,
291 lengths,
292 indices,
293 hashValues,
294 CHECK);
295 names_count = 0;
296 }
297 } else {
298 cp->symbol_at_put(index, result);
299 }
300 break;
301 }
302 default: {
303 classfile_parse_error("Unknown constant tag %u in class file %s",
304 tag,
305 CHECK);
306 break;
307 }
308 } // end of switch(tag)
309 } // end of for
310
311 // Allocate the remaining symbols
312 if (names_count > 0) {
313 SymbolTable::new_symbols(_loader_data,
314 cp,
315 names_count,
316 names,
317 lengths,
318 indices,
319 hashValues,
320 CHECK);
321 }
322
323 // Copy _current pointer of local copy back to stream.
324 assert(stream->current() == old_current, "non-exclusive use of stream");
325 stream->set_current(cfs1.current());
326
327 }
328
329 static inline bool valid_cp_range(int index, int length) {
330 return (index > 0 && index < length);
331 }
332
333 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
334 assert(cp != NULL, "invariant");
335 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
336 return cp->symbol_at(index);
337 }
338 return NULL;
339 }
340
341 #ifdef ASSERT
342 PRAGMA_DIAG_PUSH
343 PRAGMA_FORMAT_NONLITERAL_IGNORED
344 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
345 ResourceMark rm(THREAD);
346 fatal(msg, _class_name->as_C_string());
347 }
348
349 void ClassFileParser::report_assert_property_failure(const char* msg,
350 int index,
351 TRAPS) const {
352 ResourceMark rm(THREAD);
353 fatal(msg, index, _class_name->as_C_string());
354 }
355 PRAGMA_DIAG_POP
356 #endif
357
358 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
359 ConstantPool* const cp,
360 const int length,
361 TRAPS) {
362 assert(cp != NULL, "invariant");
363 assert(stream != NULL, "invariant");
364
365 // parsing constant pool entries
366 parse_constant_pool_entries(stream, cp, length, CHECK);
367
368 int index = 1; // declared outside of loops for portability
369
370 // first verification pass - validate cross references
371 // and fixup class and string constants
372 for (index = 1; index < length; index++) { // Index 0 is unused
373 const jbyte tag = cp->tag_at(index).value();
374 switch (tag) {
375 case JVM_CONSTANT_Class: {
376 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
377 break;
378 }
379 case JVM_CONSTANT_Fieldref:
380 // fall through
381 case JVM_CONSTANT_Methodref:
382 // fall through
383 case JVM_CONSTANT_InterfaceMethodref: {
384 if (!_need_verify) break;
385 const int klass_ref_index = cp->klass_ref_index_at(index);
386 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
387 check_property(valid_klass_reference_at(klass_ref_index),
388 "Invalid constant pool index %u in class file %s",
389 klass_ref_index, CHECK);
390 check_property(valid_cp_range(name_and_type_ref_index, length) &&
391 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
392 "Invalid constant pool index %u in class file %s",
393 name_and_type_ref_index, CHECK);
394 break;
395 }
396 case JVM_CONSTANT_String: {
397 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
398 break;
399 }
400 case JVM_CONSTANT_Integer:
401 break;
402 case JVM_CONSTANT_Float:
403 break;
404 case JVM_CONSTANT_Long:
405 case JVM_CONSTANT_Double: {
406 index++;
407 check_property(
408 (index < length && cp->tag_at(index).is_invalid()),
409 "Improper constant pool long/double index %u in class file %s",
410 index, CHECK);
411 break;
412 }
413 case JVM_CONSTANT_NameAndType: {
414 if (!_need_verify) break;
415 const int name_ref_index = cp->name_ref_index_at(index);
416 const int signature_ref_index = cp->signature_ref_index_at(index);
417 check_property(valid_symbol_at(name_ref_index),
418 "Invalid constant pool index %u in class file %s",
419 name_ref_index, CHECK);
420 check_property(valid_symbol_at(signature_ref_index),
421 "Invalid constant pool index %u in class file %s",
422 signature_ref_index, CHECK);
423 break;
424 }
425 case JVM_CONSTANT_Utf8:
426 break;
427 case JVM_CONSTANT_UnresolvedClass: // fall-through
428 case JVM_CONSTANT_UnresolvedClassInError: {
429 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
430 break;
431 }
432 case JVM_CONSTANT_ClassIndex: {
433 const int class_index = cp->klass_index_at(index);
434 check_property(valid_symbol_at(class_index),
435 "Invalid constant pool index %u in class file %s",
436 class_index, CHECK);
437 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
438 break;
439 }
440 case JVM_CONSTANT_StringIndex: {
441 const int string_index = cp->string_index_at(index);
442 check_property(valid_symbol_at(string_index),
443 "Invalid constant pool index %u in class file %s",
444 string_index, CHECK);
445 Symbol* const sym = cp->symbol_at(string_index);
446 cp->unresolved_string_at_put(index, sym);
447 break;
448 }
449 case JVM_CONSTANT_MethodHandle: {
450 const int ref_index = cp->method_handle_index_at(index);
451 check_property(valid_cp_range(ref_index, length),
452 "Invalid constant pool index %u in class file %s",
453 ref_index, CHECK);
454 const constantTag tag = cp->tag_at(ref_index);
455 const int ref_kind = cp->method_handle_ref_kind_at(index);
456
457 switch (ref_kind) {
458 case JVM_REF_getField:
459 case JVM_REF_getStatic:
460 case JVM_REF_putField:
461 case JVM_REF_putStatic: {
462 check_property(
463 tag.is_field(),
464 "Invalid constant pool index %u in class file %s (not a field)",
465 ref_index, CHECK);
466 break;
467 }
468 case JVM_REF_invokeVirtual:
469 case JVM_REF_newInvokeSpecial: {
470 check_property(
471 tag.is_method(),
472 "Invalid constant pool index %u in class file %s (not a method)",
473 ref_index, CHECK);
474 break;
475 }
476 case JVM_REF_invokeStatic:
477 case JVM_REF_invokeSpecial: {
478 check_property(
479 tag.is_method() ||
480 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
481 "Invalid constant pool index %u in class file %s (not a method)",
482 ref_index, CHECK);
483 break;
484 }
485 case JVM_REF_invokeInterface: {
486 check_property(
487 tag.is_interface_method(),
488 "Invalid constant pool index %u in class file %s (not an interface method)",
489 ref_index, CHECK);
490 break;
491 }
492 default: {
493 classfile_parse_error(
494 "Bad method handle kind at constant pool index %u in class file %s",
495 index, CHECK);
496 }
497 } // switch(refkind)
498 // Keep the ref_index unchanged. It will be indirected at link-time.
499 break;
500 } // case MethodHandle
501 case JVM_CONSTANT_MethodType: {
502 const int ref_index = cp->method_type_index_at(index);
503 check_property(valid_symbol_at(ref_index),
504 "Invalid constant pool index %u in class file %s",
505 ref_index, CHECK);
506 break;
507 }
508 case JVM_CONSTANT_InvokeDynamic: {
509 const int name_and_type_ref_index =
510 cp->invoke_dynamic_name_and_type_ref_index_at(index);
511
512 check_property(valid_cp_range(name_and_type_ref_index, length) &&
513 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
514 "Invalid constant pool index %u in class file %s",
515 name_and_type_ref_index, CHECK);
516 // bootstrap specifier index must be checked later,
517 // when BootstrapMethods attr is available
518 break;
519 }
520 default: {
521 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
522 ShouldNotReachHere();
523 break;
524 }
525 } // switch(tag)
526 } // end of for
527
528 if (_cp_patches != NULL) {
529 // need to treat this_class specially...
530 int this_class_index;
531 {
532 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
533 const u1* const mark = stream->current();
534 stream->skip_u2_fast(1); // skip flags
535 this_class_index = stream->get_u2_fast();
536 stream->set_current(mark); // revert to mark
537 }
538
539 for (index = 1; index < length; index++) { // Index 0 is unused
540 if (has_cp_patch_at(index)) {
541 guarantee_property(index != this_class_index,
542 "Illegal constant pool patch to self at %d in class file %s",
543 index, CHECK);
544 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
545 }
546 }
547 }
548
549 if (!_need_verify) {
550 return;
551 }
552
553 // second verification pass - checks the strings are of the right format.
554 // but not yet to the other entries
555 for (index = 1; index < length; index++) {
556 const jbyte tag = cp->tag_at(index).value();
557 switch (tag) {
558 case JVM_CONSTANT_UnresolvedClass: {
559 const Symbol* const class_name = cp->klass_name_at(index);
560 // check the name, even if _cp_patches will overwrite it
561 verify_legal_class_name(class_name, CHECK);
562 break;
563 }
564 case JVM_CONSTANT_NameAndType: {
565 if (_need_verify && _major_version >= JAVA_7_VERSION) {
566 const int sig_index = cp->signature_ref_index_at(index);
567 const int name_index = cp->name_ref_index_at(index);
568 const Symbol* const name = cp->symbol_at(name_index);
569 const Symbol* const sig = cp->symbol_at(sig_index);
570 guarantee_property(sig->utf8_length() != 0,
571 "Illegal zero length constant pool entry at %d in class %s",
572 sig_index, CHECK);
573 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
574 verify_legal_method_signature(name, sig, CHECK);
575 } else {
576 verify_legal_field_signature(name, sig, CHECK);
577 }
578 }
579 break;
580 }
581 case JVM_CONSTANT_InvokeDynamic:
582 case JVM_CONSTANT_Fieldref:
583 case JVM_CONSTANT_Methodref:
584 case JVM_CONSTANT_InterfaceMethodref: {
585 const int name_and_type_ref_index =
586 cp->name_and_type_ref_index_at(index);
587 // already verified to be utf8
588 const int name_ref_index =
589 cp->name_ref_index_at(name_and_type_ref_index);
590 // already verified to be utf8
591 const int signature_ref_index =
592 cp->signature_ref_index_at(name_and_type_ref_index);
593 const Symbol* const name = cp->symbol_at(name_ref_index);
594 const Symbol* const signature = cp->symbol_at(signature_ref_index);
595 if (tag == JVM_CONSTANT_Fieldref) {
596 verify_legal_field_name(name, CHECK);
597 if (_need_verify && _major_version >= JAVA_7_VERSION) {
598 // Signature is verified above, when iterating NameAndType_info.
599 // Need only to be sure it's non-zero length and the right type.
600 if (signature->utf8_length() == 0 ||
601 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
602 throwIllegalSignature(
603 "Field", name, signature, CHECK);
604 }
605 } else {
606 verify_legal_field_signature(name, signature, CHECK);
607 }
608 } else {
609 verify_legal_method_name(name, CHECK);
610 if (_need_verify && _major_version >= JAVA_7_VERSION) {
611 // Signature is verified above, when iterating NameAndType_info.
612 // Need only to be sure it's non-zero length and the right type.
613 if (signature->utf8_length() == 0 ||
614 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
615 throwIllegalSignature(
616 "Method", name, signature, CHECK);
617 }
618 } else {
619 verify_legal_method_signature(name, signature, CHECK);
620 }
621 if (tag == JVM_CONSTANT_Methodref) {
622 // 4509014: If a class method name begins with '<', it must be "<init>".
623 assert(name != NULL, "method name in constant pool is null");
624 const unsigned int name_len = name->utf8_length();
625 if (name_len != 0 && name->byte_at(0) == '<') {
626 if (name != vmSymbols::object_initializer_name()) {
627 classfile_parse_error(
628 "Bad method name at constant pool index %u in class file %s",
629 name_ref_index, CHECK);
630 }
631 }
632 }
633 }
634 break;
635 }
636 case JVM_CONSTANT_MethodHandle: {
637 const int ref_index = cp->method_handle_index_at(index);
638 const int ref_kind = cp->method_handle_ref_kind_at(index);
639 switch (ref_kind) {
640 case JVM_REF_invokeVirtual:
641 case JVM_REF_invokeStatic:
642 case JVM_REF_invokeSpecial:
643 case JVM_REF_newInvokeSpecial: {
644 const int name_and_type_ref_index =
645 cp->name_and_type_ref_index_at(ref_index);
646 const int name_ref_index =
647 cp->name_ref_index_at(name_and_type_ref_index);
648 const Symbol* const name = cp->symbol_at(name_ref_index);
649 if (ref_kind == JVM_REF_newInvokeSpecial) {
650 if (name != vmSymbols::object_initializer_name()) {
651 classfile_parse_error(
652 "Bad constructor name at constant pool index %u in class file %s",
653 name_ref_index, CHECK);
654 }
655 } else {
656 if (name == vmSymbols::object_initializer_name()) {
657 classfile_parse_error(
658 "Bad method name at constant pool index %u in class file %s",
659 name_ref_index, CHECK);
660 }
661 }
662 break;
663 }
664 // Other ref_kinds are already fully checked in previous pass.
665 } // switch(ref_kind)
666 break;
667 }
668 case JVM_CONSTANT_MethodType: {
669 const Symbol* const no_name = vmSymbols::type_name(); // place holder
670 const Symbol* const signature = cp->method_type_signature_at(index);
671 verify_legal_method_signature(no_name, signature, CHECK);
672 break;
673 }
674 case JVM_CONSTANT_Utf8: {
675 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
676 }
677 } // switch(tag)
678 } // end of for
679 }
680
681 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
682 int index,
683 Handle patch,
684 TRAPS) {
685 assert(cp != NULL, "invariant");
686
687 BasicType patch_type = T_VOID;
688
689 switch (cp->tag_at(index).value()) {
690
691 case JVM_CONSTANT_UnresolvedClass: {
692 // Patching a class means pre-resolving it.
693 // The name in the constant pool is ignored.
694 if (java_lang_Class::is_instance(patch())) {
695 guarantee_property(!java_lang_Class::is_primitive(patch()),
696 "Illegal class patch at %d in class file %s",
697 index, CHECK);
698 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
699 } else {
700 guarantee_property(java_lang_String::is_instance(patch()),
701 "Illegal class patch at %d in class file %s",
702 index, CHECK);
703 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
704 cp->unresolved_klass_at_put(index, name);
705 }
706 break;
707 }
708
709 case JVM_CONSTANT_String: {
710 // skip this patch and don't clear it. Needs the oop array for resolved
711 // references to be created first.
712 return;
713 }
714 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
715 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
716 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
717 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
718 patch_prim:
719 {
720 jvalue value;
721 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
722 guarantee_property(value_type == patch_type,
723 "Illegal primitive patch at %d in class file %s",
724 index, CHECK);
725 switch (value_type) {
726 case T_INT: cp->int_at_put(index, value.i); break;
727 case T_FLOAT: cp->float_at_put(index, value.f); break;
728 case T_LONG: cp->long_at_put(index, value.j); break;
729 case T_DOUBLE: cp->double_at_put(index, value.d); break;
730 default: assert(false, "");
731 }
732 } // end patch_prim label
733 break;
734
735 default: {
736 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
737 guarantee_property(!has_cp_patch_at(index),
738 "Illegal unexpected patch at %d in class file %s",
739 index, CHECK);
740 return;
741 }
742 } // end of switch(tag)
743
744 // On fall-through, mark the patch as used.
745 clear_cp_patch_at(index);
746 }
747 class NameSigHash: public ResourceObj {
748 public:
749 const Symbol* _name; // name
750 const Symbol* _sig; // signature
751 NameSigHash* _next; // Next entry in hash table
752 };
753
754 static const int HASH_ROW_SIZE = 256;
755
756 static unsigned int hash(const Symbol* name, const Symbol* sig) {
757 unsigned int raw_hash = 0;
758 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
759 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
760
761 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
762 }
763
764
765 static void initialize_hashtable(NameSigHash** table) {
766 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
767 }
768 // Return false if the name/sig combination is found in table.
769 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
770 // The old format checker uses heap sort to find duplicates.
771 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
772 // of table since we don't expect Symbol*'s to move.
773 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
774 assert(name != NULL, "name in constant pool is NULL");
775
776 // First lookup for duplicates
777 int index = hash(name, sig);
778 NameSigHash* entry = table[index];
779 while (entry != NULL) {
780 if (entry->_name == name && entry->_sig == sig) {
781 return false;
782 }
783 entry = entry->_next;
784 }
785
786 // No duplicate is found, allocate a new entry and fill it.
787 entry = new NameSigHash();
788 entry->_name = name;
789 entry->_sig = sig;
790
791 // Insert into hash table
792 entry->_next = table[index];
793 table[index] = entry;
794
795 return true;
796 }
797
798 // Side-effects: populates the _local_interfaces field
799 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
800 const int itfs_len,
801 ConstantPool* const cp,
802 bool* const has_default_methods,
803 TRAPS) {
804 assert(stream != NULL, "invariant");
805 assert(cp != NULL, "invariant");
806 assert(has_default_methods != NULL, "invariant");
807
808 if (itfs_len == 0) {
809 _local_interfaces = Universe::the_empty_klass_array();
810 } else {
811 assert(itfs_len > 0, "only called for len>0");
812 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
813
814 int index;
815 for (index = 0; index < itfs_len; index++) {
816 const u2 interface_index = stream->get_u2(CHECK);
817 KlassHandle interf;
818 check_property(
819 valid_klass_reference_at(interface_index),
820 "Interface name has bad constant pool index %u in class file %s",
821 interface_index, CHECK);
822 if (cp->tag_at(interface_index).is_klass()) {
823 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
824 } else {
825 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
826
827 // Don't need to check legal name because it's checked when parsing constant pool.
828 // But need to make sure it's not an array type.
829 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
830 "Bad interface name in class file %s", CHECK);
831
832 // Call resolve_super so classcircularity is checked
833 const Klass* const k =
834 SystemDictionary::resolve_super_or_fail(_class_name,
835 unresolved_klass,
836 _loader_data->class_loader(),
837 _protection_domain,
838 false,
839 CHECK);
840 interf = KlassHandle(THREAD, k);
841 }
842
843 if (!interf()->is_interface()) {
844 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
845 "Implementing class");
846 }
847
848 if (InstanceKlass::cast(interf())->has_default_methods()) {
849 *has_default_methods = true;
850 }
851 _local_interfaces->at_put(index, interf());
852 }
853
854 if (!_need_verify || itfs_len <= 1) {
855 return;
856 }
857
858 // Check if there's any duplicates in interfaces
859 ResourceMark rm(THREAD);
860 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
861 NameSigHash*,
862 HASH_ROW_SIZE);
863 initialize_hashtable(interface_names);
864 bool dup = false;
865 {
866 debug_only(NoSafepointVerifier nsv;)
867 for (index = 0; index < itfs_len; index++) {
868 const Klass* const k = _local_interfaces->at(index);
869 const Symbol* const name = InstanceKlass::cast(k)->name();
870 // If no duplicates, add (name, NULL) in hashtable interface_names.
871 if (!put_after_lookup(name, NULL, interface_names)) {
872 dup = true;
873 break;
874 }
875 }
876 }
877 if (dup) {
878 classfile_parse_error("Duplicate interface name in class file %s", CHECK);
879 }
880 }
881 }
882
883 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
884 int constantvalue_index,
885 int signature_index,
886 TRAPS) const {
887 // Make sure the constant pool entry is of a type appropriate to this field
888 guarantee_property(
889 (constantvalue_index > 0 &&
890 constantvalue_index < cp->length()),
891 "Bad initial value index %u in ConstantValue attribute in class file %s",
892 constantvalue_index, CHECK);
893
894 const constantTag value_type = cp->tag_at(constantvalue_index);
895 switch(cp->basic_type_for_signature_at(signature_index)) {
896 case T_LONG: {
897 guarantee_property(value_type.is_long(),
898 "Inconsistent constant value type in class file %s",
899 CHECK);
900 break;
901 }
902 case T_FLOAT: {
903 guarantee_property(value_type.is_float(),
904 "Inconsistent constant value type in class file %s",
905 CHECK);
906 break;
907 }
908 case T_DOUBLE: {
909 guarantee_property(value_type.is_double(),
910 "Inconsistent constant value type in class file %s",
911 CHECK);
912 break;
913 }
914 case T_BYTE:
915 case T_CHAR:
916 case T_SHORT:
917 case T_BOOLEAN:
918 case T_INT: {
919 guarantee_property(value_type.is_int(),
920 "Inconsistent constant value type in class file %s",
921 CHECK);
922 break;
923 }
924 case T_OBJECT: {
925 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
926 && value_type.is_string()),
927 "Bad string initial value in class file %s",
928 CHECK);
929 break;
930 }
931 default: {
932 classfile_parse_error("Unable to set initial value %u in class file %s",
933 constantvalue_index,
934 CHECK);
935 }
936 }
937 }
938
939 class AnnotationCollector : public ResourceObj{
940 public:
941 enum Location { _in_field, _in_method, _in_class };
942 enum ID {
943 _unknown = 0,
944 _method_CallerSensitive,
945 _method_ForceInline,
946 _method_DontInline,
947 _method_InjectedProfile,
948 _method_LambdaForm_Compiled,
949 _method_LambdaForm_Hidden,
950 _method_HotSpotIntrinsicCandidate,
951 _jdk_internal_vm_annotation_Contended,
952 _field_Stable,
953 _jdk_internal_vm_annotation_ReservedStackAccess,
954 _annotation_LIMIT
955 };
956 const Location _location;
957 int _annotations_present;
958 u2 _contended_group;
959
960 AnnotationCollector(Location location)
961 : _location(location), _annotations_present(0)
962 {
963 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
964 }
965 // If this annotation name has an ID, report it (or _none).
966 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
967 // Set the annotation name:
968 void set_annotation(ID id) {
969 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
970 _annotations_present |= nth_bit((int)id);
971 }
972
973 void remove_annotation(ID id) {
974 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
975 _annotations_present &= ~nth_bit((int)id);
976 }
977
978 // Report if the annotation is present.
979 bool has_any_annotations() const { return _annotations_present != 0; }
980 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
981
982 void set_contended_group(u2 group) { _contended_group = group; }
983 u2 contended_group() const { return _contended_group; }
984
985 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
986
987 void set_stable(bool stable) { set_annotation(_field_Stable); }
988 bool is_stable() const { return has_annotation(_field_Stable); }
989 };
990
991 // This class also doubles as a holder for metadata cleanup.
992 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
993 private:
994 ClassLoaderData* _loader_data;
995 AnnotationArray* _field_annotations;
996 AnnotationArray* _field_type_annotations;
997 public:
998 FieldAnnotationCollector(ClassLoaderData* loader_data) :
999 AnnotationCollector(_in_field),
1000 _loader_data(loader_data),
1001 _field_annotations(NULL),
1002 _field_type_annotations(NULL) {}
1003 ~FieldAnnotationCollector();
1004 void apply_to(FieldInfo* f);
1005 AnnotationArray* field_annotations() { return _field_annotations; }
1006 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1007
1008 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1009 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1010 };
1011
1012 class MethodAnnotationCollector : public AnnotationCollector{
1013 public:
1014 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1015 void apply_to(methodHandle m);
1016 };
1017
1018 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1019 public:
1020 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1021 void apply_to(InstanceKlass* ik);
1022 };
1023
1024
1025 static int skip_annotation_value(const u1*, int, int); // fwd decl
1026
1027 // Skip an annotation. Return >=limit if there is any problem.
1028 static int skip_annotation(const u1* buffer, int limit, int index) {
1029 assert(buffer != NULL, "invariant");
1030 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1031 // value := switch (tag:u1) { ... }
1032 index += 2; // skip atype
1033 if ((index += 2) >= limit) return limit; // read nmem
1034 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1035 while (--nmem >= 0 && index < limit) {
1036 index += 2; // skip member
1037 index = skip_annotation_value(buffer, limit, index);
1038 }
1039 return index;
1040 }
1041
1042 // Skip an annotation value. Return >=limit if there is any problem.
1043 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1044 assert(buffer != NULL, "invariant");
1045
1046 // value := switch (tag:u1) {
1047 // case B, C, I, S, Z, D, F, J, c: con:u2;
1048 // case e: e_class:u2 e_name:u2;
1049 // case s: s_con:u2;
1050 // case [: do(nval:u2) {value};
1051 // case @: annotation;
1052 // case s: s_con:u2;
1053 // }
1054 if ((index += 1) >= limit) return limit; // read tag
1055 const u1 tag = buffer[index - 1];
1056 switch (tag) {
1057 case 'B':
1058 case 'C':
1059 case 'I':
1060 case 'S':
1061 case 'Z':
1062 case 'D':
1063 case 'F':
1064 case 'J':
1065 case 'c':
1066 case 's':
1067 index += 2; // skip con or s_con
1068 break;
1069 case 'e':
1070 index += 4; // skip e_class, e_name
1071 break;
1072 case '[':
1073 {
1074 if ((index += 2) >= limit) return limit; // read nval
1075 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1076 while (--nval >= 0 && index < limit) {
1077 index = skip_annotation_value(buffer, limit, index);
1078 }
1079 }
1080 break;
1081 case '@':
1082 index = skip_annotation(buffer, limit, index);
1083 break;
1084 default:
1085 return limit; // bad tag byte
1086 }
1087 return index;
1088 }
1089
1090 // Sift through annotations, looking for those significant to the VM:
1091 static void parse_annotations(const ConstantPool* const cp,
1092 const u1* buffer, int limit,
1093 AnnotationCollector* coll,
1094 ClassLoaderData* loader_data,
1095 TRAPS) {
1096
1097 assert(cp != NULL, "invariant");
1098 assert(buffer != NULL, "invariant");
1099 assert(coll != NULL, "invariant");
1100 assert(loader_data != NULL, "invariant");
1101
1102 // annotations := do(nann:u2) {annotation}
1103 int index = 0;
1104 if ((index += 2) >= limit) return; // read nann
1105 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1106 enum { // initial annotation layout
1107 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1108 count_off = 2, // u2 such as 1 (one value)
1109 member_off = 4, // utf8 such as 'value'
1110 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1111 e_tag_val = 'e',
1112 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1113 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1114 e_size = 11, // end of 'e' annotation
1115 c_tag_val = 'c', // payload is type
1116 c_con_off = 7, // utf8 payload, such as 'I'
1117 c_size = 9, // end of 'c' annotation
1118 s_tag_val = 's', // payload is String
1119 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1120 s_size = 9,
1121 min_size = 6 // smallest possible size (zero members)
1122 };
1123 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) {
1124 int index0 = index;
1125 index = skip_annotation(buffer, limit, index);
1126 const u1* const abase = buffer + index0;
1127 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1128 const int count = Bytes::get_Java_u2((address)abase + count_off);
1129 const Symbol* const aname = check_symbol_at(cp, atype);
1130 if (aname == NULL) break; // invalid annotation name
1131 const Symbol* member = NULL;
1132 if (count >= 1) {
1133 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1134 member = check_symbol_at(cp, member_index);
1135 if (member == NULL) break; // invalid member name
1136 }
1137
1138 // Here is where parsing particular annotations will take place.
1139 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1140 if (AnnotationCollector::_unknown == id) continue;
1141 coll->set_annotation(id);
1142
1143 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1144 // @Contended can optionally specify the contention group.
1145 //
1146 // Contended group defines the equivalence class over the fields:
1147 // the fields within the same contended group are not treated distinct.
1148 // The only exception is default group, which does not incur the
1149 // equivalence. Naturally, contention group for classes is meaningless.
1150 //
1151 // While the contention group is specified as String, annotation
1152 // values are already interned, and we might as well use the constant
1153 // pool index as the group tag.
1154 //
1155 u2 group_index = 0; // default contended group
1156 if (count == 1
1157 && s_size == (index - index0) // match size
1158 && s_tag_val == *(abase + tag_off)
1159 && member == vmSymbols::value_name()) {
1160 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1161 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1162 group_index = 0; // default contended group
1163 }
1164 }
1165 coll->set_contended_group(group_index);
1166 }
1167 }
1168 }
1169
1170
1171 // Parse attributes for a field.
1172 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1173 u2 attributes_count,
1174 bool is_static, u2 signature_index,
1175 u2* const constantvalue_index_addr,
1176 bool* const is_synthetic_addr,
1177 u2* const generic_signature_index_addr,
1178 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1179 TRAPS) {
1180 assert(cfs != NULL, "invariant");
1181 assert(constantvalue_index_addr != NULL, "invariant");
1182 assert(is_synthetic_addr != NULL, "invariant");
1183 assert(generic_signature_index_addr != NULL, "invariant");
1184 assert(parsed_annotations != NULL, "invariant");
1185 assert(attributes_count > 0, "attributes_count should be greater than 0");
1186
1187 u2 constantvalue_index = 0;
1188 u2 generic_signature_index = 0;
1189 bool is_synthetic = false;
1190 const u1* runtime_visible_annotations = NULL;
1191 int runtime_visible_annotations_length = 0;
1192 const u1* runtime_invisible_annotations = NULL;
1193 int runtime_invisible_annotations_length = 0;
1194 const u1* runtime_visible_type_annotations = NULL;
1195 int runtime_visible_type_annotations_length = 0;
1196 const u1* runtime_invisible_type_annotations = NULL;
1197 int runtime_invisible_type_annotations_length = 0;
1198 bool runtime_invisible_annotations_exists = false;
1199 bool runtime_invisible_type_annotations_exists = false;
1200 const ConstantPool* const cp = _cp;
1201
1202 while (attributes_count--) {
1203 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1204 const u2 attribute_name_index = cfs->get_u2_fast();
1205 const u4 attribute_length = cfs->get_u4_fast();
1206 check_property(valid_symbol_at(attribute_name_index),
1207 "Invalid field attribute index %u in class file %s",
1208 attribute_name_index,
1209 CHECK);
1210
1211 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1212 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1213 // ignore if non-static
1214 if (constantvalue_index != 0) {
1215 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1216 }
1217 check_property(
1218 attribute_length == 2,
1219 "Invalid ConstantValue field attribute length %u in class file %s",
1220 attribute_length, CHECK);
1221
1222 constantvalue_index = cfs->get_u2(CHECK);
1223 if (_need_verify) {
1224 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1225 }
1226 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1227 if (attribute_length != 0) {
1228 classfile_parse_error(
1229 "Invalid Synthetic field attribute length %u in class file %s",
1230 attribute_length, CHECK);
1231 }
1232 is_synthetic = true;
1233 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1234 if (attribute_length != 0) {
1235 classfile_parse_error(
1236 "Invalid Deprecated field attribute length %u in class file %s",
1237 attribute_length, CHECK);
1238 }
1239 } else if (_major_version >= JAVA_1_5_VERSION) {
1240 if (attribute_name == vmSymbols::tag_signature()) {
1241 if (attribute_length != 2) {
1242 classfile_parse_error(
1243 "Wrong size %u for field's Signature attribute in class file %s",
1244 attribute_length, CHECK);
1245 }
1246 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1247 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1248 if (runtime_visible_annotations != NULL) {
1249 classfile_parse_error(
1250 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1251 }
1252 runtime_visible_annotations_length = attribute_length;
1253 runtime_visible_annotations = cfs->get_u1_buffer();
1254 assert(runtime_visible_annotations != NULL, "null visible annotations");
1255 parse_annotations(cp,
1256 runtime_visible_annotations,
1257 runtime_visible_annotations_length,
1258 parsed_annotations,
1259 _loader_data,
1260 CHECK);
1261 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1262 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1263 if (runtime_invisible_annotations_exists) {
1264 classfile_parse_error(
1265 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1266 }
1267 runtime_invisible_annotations_exists = true;
1268 if (PreserveAllAnnotations) {
1269 runtime_invisible_annotations_length = attribute_length;
1270 runtime_invisible_annotations = cfs->get_u1_buffer();
1271 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1272 }
1273 cfs->skip_u1(attribute_length, CHECK);
1274 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1275 if (runtime_visible_type_annotations != NULL) {
1276 classfile_parse_error(
1277 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1278 }
1279 runtime_visible_type_annotations_length = attribute_length;
1280 runtime_visible_type_annotations = cfs->get_u1_buffer();
1281 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1282 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1283 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1284 if (runtime_invisible_type_annotations_exists) {
1285 classfile_parse_error(
1286 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1287 } else {
1288 runtime_invisible_type_annotations_exists = true;
1289 }
1290 if (PreserveAllAnnotations) {
1291 runtime_invisible_type_annotations_length = attribute_length;
1292 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1293 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1294 }
1295 cfs->skip_u1(attribute_length, CHECK);
1296 } else {
1297 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1298 }
1299 } else {
1300 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1301 }
1302 }
1303
1304 *constantvalue_index_addr = constantvalue_index;
1305 *is_synthetic_addr = is_synthetic;
1306 *generic_signature_index_addr = generic_signature_index;
1307 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1308 runtime_visible_annotations_length,
1309 runtime_invisible_annotations,
1310 runtime_invisible_annotations_length,
1311 CHECK);
1312 parsed_annotations->set_field_annotations(a);
1313 a = assemble_annotations(runtime_visible_type_annotations,
1314 runtime_visible_type_annotations_length,
1315 runtime_invisible_type_annotations,
1316 runtime_invisible_type_annotations_length,
1317 CHECK);
1318 parsed_annotations->set_field_type_annotations(a);
1319 return;
1320 }
1321
1322
1323 // Field allocation types. Used for computing field offsets.
1324
1325 enum FieldAllocationType {
1326 STATIC_OOP, // Oops
1327 STATIC_BYTE, // Boolean, Byte, char
1328 STATIC_SHORT, // shorts
1329 STATIC_WORD, // ints
1330 STATIC_DOUBLE, // aligned long or double
1331 NONSTATIC_OOP,
1332 NONSTATIC_BYTE,
1333 NONSTATIC_SHORT,
1334 NONSTATIC_WORD,
1335 NONSTATIC_DOUBLE,
1336 MAX_FIELD_ALLOCATION_TYPE,
1337 BAD_ALLOCATION_TYPE = -1
1338 };
1339
1340 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1341 BAD_ALLOCATION_TYPE, // 0
1342 BAD_ALLOCATION_TYPE, // 1
1343 BAD_ALLOCATION_TYPE, // 2
1344 BAD_ALLOCATION_TYPE, // 3
1345 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1346 NONSTATIC_SHORT, // T_CHAR = 5,
1347 NONSTATIC_WORD, // T_FLOAT = 6,
1348 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1349 NONSTATIC_BYTE, // T_BYTE = 8,
1350 NONSTATIC_SHORT, // T_SHORT = 9,
1351 NONSTATIC_WORD, // T_INT = 10,
1352 NONSTATIC_DOUBLE, // T_LONG = 11,
1353 NONSTATIC_OOP, // T_OBJECT = 12,
1354 NONSTATIC_OOP, // T_ARRAY = 13,
1355 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1356 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1357 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1358 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1359 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1360 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1361 BAD_ALLOCATION_TYPE, // 0
1362 BAD_ALLOCATION_TYPE, // 1
1363 BAD_ALLOCATION_TYPE, // 2
1364 BAD_ALLOCATION_TYPE, // 3
1365 STATIC_BYTE , // T_BOOLEAN = 4,
1366 STATIC_SHORT, // T_CHAR = 5,
1367 STATIC_WORD, // T_FLOAT = 6,
1368 STATIC_DOUBLE, // T_DOUBLE = 7,
1369 STATIC_BYTE, // T_BYTE = 8,
1370 STATIC_SHORT, // T_SHORT = 9,
1371 STATIC_WORD, // T_INT = 10,
1372 STATIC_DOUBLE, // T_LONG = 11,
1373 STATIC_OOP, // T_OBJECT = 12,
1374 STATIC_OOP, // T_ARRAY = 13,
1375 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1376 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1377 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1378 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1379 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1380 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1381 };
1382
1383 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1384 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1385 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1386 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1387 return result;
1388 }
1389
1390 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1391 public:
1392 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1393
1394 FieldAllocationCount() {
1395 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1396 count[i] = 0;
1397 }
1398 }
1399
1400 FieldAllocationType update(bool is_static, BasicType type) {
1401 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1402 // Make sure there is no overflow with injected fields.
1403 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1404 count[atype]++;
1405 return atype;
1406 }
1407 };
1408
1409 // Side-effects: populates the _fields, _fields_annotations,
1410 // _fields_type_annotations fields
1411 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1412 bool is_interface,
1413 FieldAllocationCount* const fac,
1414 ConstantPool* cp,
1415 const int cp_size,
1416 u2* const java_fields_count_ptr,
1417 TRAPS) {
1418
1419 assert(cfs != NULL, "invariant");
1420 assert(fac != NULL, "invariant");
1421 assert(cp != NULL, "invariant");
1422 assert(java_fields_count_ptr != NULL, "invariant");
1423
1424 assert(NULL == _fields, "invariant");
1425 assert(NULL == _fields_annotations, "invariant");
1426 assert(NULL == _fields_type_annotations, "invariant");
1427
1428 cfs->guarantee_more(2, CHECK); // length
1429 const u2 length = cfs->get_u2_fast();
1430 *java_fields_count_ptr = length;
1431
1432 int num_injected = 0;
1433 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1434 &num_injected);
1435 const int total_fields = length + num_injected;
1436
1437 // The field array starts with tuples of shorts
1438 // [access, name index, sig index, initial value index, byte offset].
1439 // A generic signature slot only exists for field with generic
1440 // signature attribute. And the access flag is set with
1441 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1442 // signature slots are at the end of the field array and after all
1443 // other fields data.
1444 //
1445 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1446 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1447 // ...
1448 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1449 // [generic signature index]
1450 // [generic signature index]
1451 // ...
1452 //
1453 // Allocate a temporary resource array for field data. For each field,
1454 // a slot is reserved in the temporary array for the generic signature
1455 // index. After parsing all fields, the data are copied to a permanent
1456 // array and any unused slots will be discarded.
1457 ResourceMark rm(THREAD);
1458 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1459 u2,
1460 total_fields * (FieldInfo::field_slots + 1));
1461
1462 // The generic signature slots start after all other fields' data.
1463 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1464 int num_generic_signature = 0;
1465 for (int n = 0; n < length; n++) {
1466 // access_flags, name_index, descriptor_index, attributes_count
1467 cfs->guarantee_more(8, CHECK);
1468
1469 AccessFlags access_flags;
1470 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1471 verify_legal_field_modifiers(flags, is_interface, CHECK);
1472 access_flags.set_flags(flags);
1473
1474 const u2 name_index = cfs->get_u2_fast();
1475 check_property(valid_symbol_at(name_index),
1476 "Invalid constant pool index %u for field name in class file %s",
1477 name_index, CHECK);
1478 const Symbol* const name = cp->symbol_at(name_index);
1479 verify_legal_field_name(name, CHECK);
1480
1481 const u2 signature_index = cfs->get_u2_fast();
1482 check_property(valid_symbol_at(signature_index),
1483 "Invalid constant pool index %u for field signature in class file %s",
1484 signature_index, CHECK);
1485 const Symbol* const sig = cp->symbol_at(signature_index);
1486 verify_legal_field_signature(name, sig, CHECK);
1487
1488 u2 constantvalue_index = 0;
1489 bool is_synthetic = false;
1490 u2 generic_signature_index = 0;
1491 const bool is_static = access_flags.is_static();
1492 FieldAnnotationCollector parsed_annotations(_loader_data);
1493
1494 const u2 attributes_count = cfs->get_u2_fast();
1495 if (attributes_count > 0) {
1496 parse_field_attributes(cfs,
1497 attributes_count,
1498 is_static,
1499 signature_index,
1500 &constantvalue_index,
1501 &is_synthetic,
1502 &generic_signature_index,
1503 &parsed_annotations,
1504 CHECK);
1505
1506 if (parsed_annotations.field_annotations() != NULL) {
1507 if (_fields_annotations == NULL) {
1508 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1509 _loader_data, length, NULL,
1510 CHECK);
1511 }
1512 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1513 parsed_annotations.set_field_annotations(NULL);
1514 }
1515 if (parsed_annotations.field_type_annotations() != NULL) {
1516 if (_fields_type_annotations == NULL) {
1517 _fields_type_annotations =
1518 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1519 length,
1520 NULL,
1521 CHECK);
1522 }
1523 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1524 parsed_annotations.set_field_type_annotations(NULL);
1525 }
1526
1527 if (is_synthetic) {
1528 access_flags.set_is_synthetic();
1529 }
1530 if (generic_signature_index != 0) {
1531 access_flags.set_field_has_generic_signature();
1532 fa[generic_signature_slot] = generic_signature_index;
1533 generic_signature_slot ++;
1534 num_generic_signature ++;
1535 }
1536 }
1537
1538 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1539 field->initialize(access_flags.as_short(),
1540 name_index,
1541 signature_index,
1542 constantvalue_index);
1543 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1544
1545 // Remember how many oops we encountered and compute allocation type
1546 const FieldAllocationType atype = fac->update(is_static, type);
1547 field->set_allocation_type(atype);
1548
1549 // After field is initialized with type, we can augment it with aux info
1550 if (parsed_annotations.has_any_annotations())
1551 parsed_annotations.apply_to(field);
1552 }
1553
1554 int index = length;
1555 if (num_injected != 0) {
1556 for (int n = 0; n < num_injected; n++) {
1557 // Check for duplicates
1558 if (injected[n].may_be_java) {
1559 const Symbol* const name = injected[n].name();
1560 const Symbol* const signature = injected[n].signature();
1561 bool duplicate = false;
1562 for (int i = 0; i < length; i++) {
1563 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1564 if (name == cp->symbol_at(f->name_index()) &&
1565 signature == cp->symbol_at(f->signature_index())) {
1566 // Symbol is desclared in Java so skip this one
1567 duplicate = true;
1568 break;
1569 }
1570 }
1571 if (duplicate) {
1572 // These will be removed from the field array at the end
1573 continue;
1574 }
1575 }
1576
1577 // Injected field
1578 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1579 field->initialize(JVM_ACC_FIELD_INTERNAL,
1580 injected[n].name_index,
1581 injected[n].signature_index,
1582 0);
1583
1584 const BasicType type = FieldType::basic_type(injected[n].signature());
1585
1586 // Remember how many oops we encountered and compute allocation type
1587 const FieldAllocationType atype = fac->update(false, type);
1588 field->set_allocation_type(atype);
1589 index++;
1590 }
1591 }
1592
1593 assert(NULL == _fields, "invariant");
1594
1595 _fields =
1596 MetadataFactory::new_array<u2>(_loader_data,
1597 index * FieldInfo::field_slots + num_generic_signature,
1598 CHECK);
1599 // Sometimes injected fields already exist in the Java source so
1600 // the fields array could be too long. In that case the
1601 // fields array is trimed. Also unused slots that were reserved
1602 // for generic signature indexes are discarded.
1603 {
1604 int i = 0;
1605 for (; i < index * FieldInfo::field_slots; i++) {
1606 _fields->at_put(i, fa[i]);
1607 }
1608 for (int j = total_fields * FieldInfo::field_slots;
1609 j < generic_signature_slot; j++) {
1610 _fields->at_put(i++, fa[j]);
1611 }
1612 assert(_fields->length() == i, "");
1613 }
1614
1615 if (_need_verify && length > 1) {
1616 // Check duplicated fields
1617 ResourceMark rm(THREAD);
1618 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1619 THREAD, NameSigHash*, HASH_ROW_SIZE);
1620 initialize_hashtable(names_and_sigs);
1621 bool dup = false;
1622 {
1623 debug_only(NoSafepointVerifier nsv;)
1624 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1625 const Symbol* const name = fs.name();
1626 const Symbol* const sig = fs.signature();
1627 // If no duplicates, add name/signature in hashtable names_and_sigs.
1628 if (!put_after_lookup(name, sig, names_and_sigs)) {
1629 dup = true;
1630 break;
1631 }
1632 }
1633 }
1634 if (dup) {
1635 classfile_parse_error("Duplicate field name&signature in class file %s",
1636 CHECK);
1637 }
1638 }
1639 }
1640
1641
1642 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1643 while (length-- > 0) {
1644 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1645 }
1646 }
1647
1648 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1649 u4 code_length,
1650 u4 exception_table_length,
1651 TRAPS) {
1652 assert(cfs != NULL, "invariant");
1653
1654 const u2* const exception_table_start = cfs->get_u2_buffer();
1655 assert(exception_table_start != NULL, "null exception table");
1656
1657 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1658 // end_pc,
1659 // handler_pc,
1660 // catch_type_index
1661
1662 // Will check legal target after parsing code array in verifier.
1663 if (_need_verify) {
1664 for (unsigned int i = 0; i < exception_table_length; i++) {
1665 const u2 start_pc = cfs->get_u2_fast();
1666 const u2 end_pc = cfs->get_u2_fast();
1667 const u2 handler_pc = cfs->get_u2_fast();
1668 const u2 catch_type_index = cfs->get_u2_fast();
1669 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1670 "Illegal exception table range in class file %s",
1671 CHECK_NULL);
1672 guarantee_property(handler_pc < code_length,
1673 "Illegal exception table handler in class file %s",
1674 CHECK_NULL);
1675 if (catch_type_index != 0) {
1676 guarantee_property(valid_klass_reference_at(catch_type_index),
1677 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1678 }
1679 }
1680 } else {
1681 cfs->skip_u2_fast(exception_table_length * 4);
1682 }
1683 return exception_table_start;
1684 }
1685
1686 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1687 u4 code_length,
1688 CompressedLineNumberWriteStream**const write_stream,
1689 TRAPS) {
1690
1691 const ClassFileStream* const cfs = _stream;
1692 unsigned int num_entries = cfs->get_u2(CHECK);
1693
1694 // Each entry is a u2 start_pc, and a u2 line_number
1695 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1696
1697 // Verify line number attribute and table length
1698 check_property(
1699 code_attribute_length == sizeof(u2) + length_in_bytes,
1700 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1701
1702 cfs->guarantee_more(length_in_bytes, CHECK);
1703
1704 if ((*write_stream) == NULL) {
1705 if (length_in_bytes > fixed_buffer_size) {
1706 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1707 } else {
1708 (*write_stream) = new CompressedLineNumberWriteStream(
1709 _linenumbertable_buffer, fixed_buffer_size);
1710 }
1711 }
1712
1713 while (num_entries-- > 0) {
1714 const u2 bci = cfs->get_u2_fast(); // start_pc
1715 const u2 line = cfs->get_u2_fast(); // line_number
1716 guarantee_property(bci < code_length,
1717 "Invalid pc in LineNumberTable in class file %s", CHECK);
1718 (*write_stream)->write_pair(bci, line);
1719 }
1720 }
1721
1722
1723 class LVT_Hash : public AllStatic {
1724 public:
1725
1726 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1727 /*
1728 * 3-tuple start_bci/length/slot has to be unique key,
1729 * so the following comparison seems to be redundant:
1730 * && elem->name_cp_index == entry->_elem->name_cp_index
1731 */
1732 return (e0.start_bci == e1.start_bci &&
1733 e0.length == e1.length &&
1734 e0.name_cp_index == e1.name_cp_index &&
1735 e0.slot == e1.slot);
1736 }
1737
1738 static unsigned int hash(LocalVariableTableElement const& e0) {
1739 unsigned int raw_hash = e0.start_bci;
1740
1741 raw_hash = e0.length + raw_hash * 37;
1742 raw_hash = e0.name_cp_index + raw_hash * 37;
1743 raw_hash = e0.slot + raw_hash * 37;
1744
1745 return raw_hash;
1746 }
1747 };
1748
1749
1750 // Class file LocalVariableTable elements.
1751 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1752 public:
1753 u2 start_bci;
1754 u2 length;
1755 u2 name_cp_index;
1756 u2 descriptor_cp_index;
1757 u2 slot;
1758 };
1759
1760 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1761 LocalVariableTableElement* const lvt) {
1762 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1763 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1764 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1765 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1766 lvt->signature_cp_index = 0;
1767 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1768 }
1769
1770 // Function is used to parse both attributes:
1771 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1772 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1773 u4 code_length,
1774 u2 max_locals,
1775 u4 code_attribute_length,
1776 u2* const localvariable_table_length,
1777 bool isLVTT,
1778 TRAPS) {
1779 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1780 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1781 const unsigned int size =
1782 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1783
1784 const ConstantPool* const cp = _cp;
1785
1786 // Verify local variable table attribute has right length
1787 if (_need_verify) {
1788 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1789 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1790 }
1791
1792 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1793 assert(localvariable_table_start != NULL, "null local variable table");
1794 if (!_need_verify) {
1795 cfs->skip_u2_fast(size);
1796 } else {
1797 cfs->guarantee_more(size * 2, CHECK_NULL);
1798 for(int i = 0; i < (*localvariable_table_length); i++) {
1799 const u2 start_pc = cfs->get_u2_fast();
1800 const u2 length = cfs->get_u2_fast();
1801 const u2 name_index = cfs->get_u2_fast();
1802 const u2 descriptor_index = cfs->get_u2_fast();
1803 const u2 index = cfs->get_u2_fast();
1804 // Assign to a u4 to avoid overflow
1805 const u4 end_pc = (u4)start_pc + (u4)length;
1806
1807 if (start_pc >= code_length) {
1808 classfile_parse_error(
1809 "Invalid start_pc %u in %s in class file %s",
1810 start_pc, tbl_name, CHECK_NULL);
1811 }
1812 if (end_pc > code_length) {
1813 classfile_parse_error(
1814 "Invalid length %u in %s in class file %s",
1815 length, tbl_name, CHECK_NULL);
1816 }
1817 const int cp_size = cp->length();
1818 guarantee_property(valid_symbol_at(name_index),
1819 "Name index %u in %s has bad constant type in class file %s",
1820 name_index, tbl_name, CHECK_NULL);
1821 guarantee_property(valid_symbol_at(descriptor_index),
1822 "Signature index %u in %s has bad constant type in class file %s",
1823 descriptor_index, tbl_name, CHECK_NULL);
1824
1825 const Symbol* const name = cp->symbol_at(name_index);
1826 const Symbol* const sig = cp->symbol_at(descriptor_index);
1827 verify_legal_field_name(name, CHECK_NULL);
1828 u2 extra_slot = 0;
1829 if (!isLVTT) {
1830 verify_legal_field_signature(name, sig, CHECK_NULL);
1831
1832 // 4894874: check special cases for double and long local variables
1833 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1834 sig == vmSymbols::type_signature(T_LONG)) {
1835 extra_slot = 1;
1836 }
1837 }
1838 guarantee_property((index + extra_slot) < max_locals,
1839 "Invalid index %u in %s in class file %s",
1840 index, tbl_name, CHECK_NULL);
1841 }
1842 }
1843 return localvariable_table_start;
1844 }
1845
1846
1847 void ClassFileParser::parse_type_array(u2 array_length,
1848 u4 code_length,
1849 u4* const u1_index,
1850 u4* const u2_index,
1851 u1* const u1_array,
1852 u2* const u2_array,
1853 TRAPS) {
1854 const ClassFileStream* const cfs = _stream;
1855 u2 index = 0; // index in the array with long/double occupying two slots
1856 u4 i1 = *u1_index;
1857 u4 i2 = *u2_index + 1;
1858 for(int i = 0; i < array_length; i++) {
1859 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1860 index++;
1861 if (tag == ITEM_Long || tag == ITEM_Double) {
1862 index++;
1863 } else if (tag == ITEM_Object) {
1864 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1865 guarantee_property(valid_klass_reference_at(class_index),
1866 "Bad class index %u in StackMap in class file %s",
1867 class_index, CHECK);
1868 } else if (tag == ITEM_Uninitialized) {
1869 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1870 guarantee_property(
1871 offset < code_length,
1872 "Bad uninitialized type offset %u in StackMap in class file %s",
1873 offset, CHECK);
1874 } else {
1875 guarantee_property(
1876 tag <= (u1)ITEM_Uninitialized,
1877 "Unknown variable type %u in StackMap in class file %s",
1878 tag, CHECK);
1879 }
1880 }
1881 u2_array[*u2_index] = index;
1882 *u1_index = i1;
1883 *u2_index = i2;
1884 }
1885
1886 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1887 u4 code_attribute_length,
1888 bool need_verify,
1889 TRAPS) {
1890 assert(cfs != NULL, "invariant");
1891
1892 if (0 == code_attribute_length) {
1893 return NULL;
1894 }
1895
1896 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1897 assert(stackmap_table_start != NULL, "null stackmap table");
1898
1899 // check code_attribute_length first
1900 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1901
1902 if (!need_verify && !DumpSharedSpaces) {
1903 return NULL;
1904 }
1905 return stackmap_table_start;
1906 }
1907
1908 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1909 u2* const checked_exceptions_length,
1910 u4 method_attribute_length,
1911 TRAPS) {
1912 assert(cfs != NULL, "invariant");
1913 assert(checked_exceptions_length != NULL, "invariant");
1914
1915 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1916 *checked_exceptions_length = cfs->get_u2_fast();
1917 const unsigned int size =
1918 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1919 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1920 assert(checked_exceptions_start != NULL, "null checked exceptions");
1921 if (!_need_verify) {
1922 cfs->skip_u2_fast(size);
1923 } else {
1924 // Verify each value in the checked exception table
1925 u2 checked_exception;
1926 const u2 len = *checked_exceptions_length;
1927 cfs->guarantee_more(2 * len, CHECK_NULL);
1928 for (int i = 0; i < len; i++) {
1929 checked_exception = cfs->get_u2_fast();
1930 check_property(
1931 valid_klass_reference_at(checked_exception),
1932 "Exception name has bad type at constant pool %u in class file %s",
1933 checked_exception, CHECK_NULL);
1934 }
1935 }
1936 // check exceptions attribute length
1937 if (_need_verify) {
1938 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1939 sizeof(u2) * size),
1940 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1941 }
1942 return checked_exceptions_start;
1943 }
1944
1945 void ClassFileParser::throwIllegalSignature(const char* type,
1946 const Symbol* name,
1947 const Symbol* sig,
1948 TRAPS) const {
1949 assert(name != NULL, "invariant");
1950 assert(sig != NULL, "invariant");
1951
1952 ResourceMark rm(THREAD);
1953 Exceptions::fthrow(THREAD_AND_LOCATION,
1954 vmSymbols::java_lang_ClassFormatError(),
1955 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1956 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1957 }
1958
1959 AnnotationCollector::ID
1960 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1961 const Symbol* name) {
1962 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1963 // Privileged code can use all annotations. Other code silently drops some.
1964 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1965 loader_data->is_ext_class_loader_data() ||
1966 loader_data->is_anonymous();
1967 switch (sid) {
1968 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): {
1969 if (_location != _in_method) break; // only allow for methods
1970 if (!privileged) break; // only allow in privileged code
1971 return _method_CallerSensitive;
1972 }
1973 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1974 if (_location != _in_method) break; // only allow for methods
1975 if (!privileged) break; // only allow in privileged code
1976 return _method_ForceInline;
1977 }
1978 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1979 if (_location != _in_method) break; // only allow for methods
1980 if (!privileged) break; // only allow in privileged code
1981 return _method_DontInline;
1982 }
1983 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1984 if (_location != _in_method) break; // only allow for methods
1985 if (!privileged) break; // only allow in privileged code
1986 return _method_InjectedProfile;
1987 }
1988 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1989 if (_location != _in_method) break; // only allow for methods
1990 if (!privileged) break; // only allow in privileged code
1991 return _method_LambdaForm_Compiled;
1992 }
1993 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
1994 if (_location != _in_method) break; // only allow for methods
1995 if (!privileged) break; // only allow in privileged code
1996 return _method_LambdaForm_Hidden;
1997 }
1998 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
1999 if (_location != _in_method) break; // only allow for methods
2000 if (!privileged) break; // only allow in privileged code
2001 return _method_HotSpotIntrinsicCandidate;
2002 }
2003 #if INCLUDE_JVMCI
2004 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_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 #endif
2010 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2011 if (_location != _in_field) break; // only allow for fields
2012 if (!privileged) break; // only allow in privileged code
2013 return _field_Stable;
2014 }
2015 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2016 if (_location != _in_field && _location != _in_class) {
2017 break; // only allow for fields and classes
2018 }
2019 if (!EnableContended || (RestrictContended && !privileged)) {
2020 break; // honor privileges
2021 }
2022 return _jdk_internal_vm_annotation_Contended;
2023 }
2024 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2025 if (_location != _in_method) break; // only allow for methods
2026 if (RestrictReservedStack && !privileged) break; // honor privileges
2027 return _jdk_internal_vm_annotation_ReservedStackAccess;
2028 }
2029 default: {
2030 break;
2031 }
2032 }
2033 return AnnotationCollector::_unknown;
2034 }
2035
2036 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2037 if (is_contended())
2038 f->set_contended_group(contended_group());
2039 if (is_stable())
2040 f->set_stable(true);
2041 }
2042
2043 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2044 // If there's an error deallocate metadata for field annotations
2045 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2046 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2047 }
2048
2049 void MethodAnnotationCollector::apply_to(methodHandle m) {
2050 if (has_annotation(_method_CallerSensitive))
2051 m->set_caller_sensitive(true);
2052 if (has_annotation(_method_ForceInline))
2053 m->set_force_inline(true);
2054 if (has_annotation(_method_DontInline))
2055 m->set_dont_inline(true);
2056 if (has_annotation(_method_InjectedProfile))
2057 m->set_has_injected_profile(true);
2058 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2059 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2060 if (has_annotation(_method_LambdaForm_Hidden))
2061 m->set_hidden(true);
2062 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2063 m->set_intrinsic_candidate(true);
2064 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2065 m->set_has_reserved_stack_access(true);
2066 }
2067
2068 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2069 assert(ik != NULL, "invariant");
2070 ik->set_is_contended(is_contended());
2071 }
2072
2073 #define MAX_ARGS_SIZE 255
2074 #define MAX_CODE_SIZE 65535
2075 #define INITIAL_MAX_LVT_NUMBER 256
2076
2077 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2078 *
2079 * Rules for LVT's and LVTT's are:
2080 * - There can be any number of LVT's and LVTT's.
2081 * - If there are n LVT's, it is the same as if there was just
2082 * one LVT containing all the entries from the n LVT's.
2083 * - There may be no more than one LVT entry per local variable.
2084 * Two LVT entries are 'equal' if these fields are the same:
2085 * start_pc, length, name, slot
2086 * - There may be no more than one LVTT entry per each LVT entry.
2087 * Each LVTT entry has to match some LVT entry.
2088 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2089 */
2090 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2091 int lvt_cnt,
2092 u2* const localvariable_table_length,
2093 const u2**const localvariable_table_start,
2094 int lvtt_cnt,
2095 u2* const localvariable_type_table_length,
2096 const u2**const localvariable_type_table_start,
2097 TRAPS) {
2098
2099 ResourceMark rm(THREAD);
2100
2101 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2102 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2103
2104 LVT_HashTable* const table = new LVT_HashTable();
2105
2106 // To fill LocalVariableTable in
2107 const Classfile_LVT_Element* cf_lvt;
2108 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2109
2110 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2111 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2112 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2113 copy_lvt_element(&cf_lvt[idx], lvt);
2114 // If no duplicates, add LVT elem in hashtable.
2115 if (table->put(*lvt, lvt) == false
2116 && _need_verify
2117 && _major_version >= JAVA_1_5_VERSION) {
2118 classfile_parse_error("Duplicated LocalVariableTable attribute "
2119 "entry for '%s' in class file %s",
2120 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2121 CHECK);
2122 }
2123 }
2124 }
2125
2126 // To merge LocalVariableTable and LocalVariableTypeTable
2127 const Classfile_LVT_Element* cf_lvtt;
2128 LocalVariableTableElement lvtt_elem;
2129
2130 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2131 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2132 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2133 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2134 LocalVariableTableElement** entry = table->get(lvtt_elem);
2135 if (entry == NULL) {
2136 if (_need_verify) {
2137 classfile_parse_error("LVTT entry for '%s' in class file %s "
2138 "does not match any LVT entry",
2139 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2140 CHECK);
2141 }
2142 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2143 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2144 "entry for '%s' in class file %s",
2145 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2146 CHECK);
2147 } else {
2148 // to add generic signatures into LocalVariableTable
2149 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2150 }
2151 }
2152 }
2153 }
2154
2155
2156 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2157 const u1* runtime_visible_annotations,
2158 int runtime_visible_annotations_length,
2159 const u1* runtime_invisible_annotations,
2160 int runtime_invisible_annotations_length,
2161 const u1* runtime_visible_parameter_annotations,
2162 int runtime_visible_parameter_annotations_length,
2163 const u1* runtime_invisible_parameter_annotations,
2164 int runtime_invisible_parameter_annotations_length,
2165 const u1* runtime_visible_type_annotations,
2166 int runtime_visible_type_annotations_length,
2167 const u1* runtime_invisible_type_annotations,
2168 int runtime_invisible_type_annotations_length,
2169 const u1* annotation_default,
2170 int annotation_default_length,
2171 TRAPS) {
2172
2173 AnnotationArray* a;
2174
2175 if (runtime_visible_annotations_length +
2176 runtime_invisible_annotations_length > 0) {
2177 a = assemble_annotations(runtime_visible_annotations,
2178 runtime_visible_annotations_length,
2179 runtime_invisible_annotations,
2180 runtime_invisible_annotations_length,
2181 CHECK);
2182 cm->set_method_annotations(a);
2183 }
2184
2185 if (runtime_visible_parameter_annotations_length +
2186 runtime_invisible_parameter_annotations_length > 0) {
2187 a = assemble_annotations(runtime_visible_parameter_annotations,
2188 runtime_visible_parameter_annotations_length,
2189 runtime_invisible_parameter_annotations,
2190 runtime_invisible_parameter_annotations_length,
2191 CHECK);
2192 cm->set_parameter_annotations(a);
2193 }
2194
2195 if (annotation_default_length > 0) {
2196 a = assemble_annotations(annotation_default,
2197 annotation_default_length,
2198 NULL,
2199 0,
2200 CHECK);
2201 cm->set_default_annotations(a);
2202 }
2203
2204 if (runtime_visible_type_annotations_length +
2205 runtime_invisible_type_annotations_length > 0) {
2206 a = assemble_annotations(runtime_visible_type_annotations,
2207 runtime_visible_type_annotations_length,
2208 runtime_invisible_type_annotations,
2209 runtime_invisible_type_annotations_length,
2210 CHECK);
2211 cm->set_type_annotations(a);
2212 }
2213 }
2214
2215
2216 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2217 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2218 // Method* to save footprint, so we only know the size of the resulting Method* when the
2219 // entire method attribute is parsed.
2220 //
2221 // The promoted_flags parameter is used to pass relevant access_flags
2222 // from the method back up to the containing klass. These flag values
2223 // are added to klass's access_flags.
2224
2225 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2226 bool is_interface,
2227 const ConstantPool* cp,
2228 AccessFlags* const promoted_flags,
2229 TRAPS) {
2230 assert(cfs != NULL, "invariant");
2231 assert(cp != NULL, "invariant");
2232 assert(promoted_flags != NULL, "invariant");
2233
2234 ResourceMark rm(THREAD);
2235 // Parse fixed parts:
2236 // access_flags, name_index, descriptor_index, attributes_count
2237 cfs->guarantee_more(8, CHECK_NULL);
2238
2239 int flags = cfs->get_u2_fast();
2240 const u2 name_index = cfs->get_u2_fast();
2241 const int cp_size = cp->length();
2242 check_property(
2243 valid_symbol_at(name_index),
2244 "Illegal constant pool index %u for method name in class file %s",
2245 name_index, CHECK_NULL);
2246 const Symbol* const name = cp->symbol_at(name_index);
2247 verify_legal_method_name(name, CHECK_NULL);
2248
2249 const u2 signature_index = cfs->get_u2_fast();
2250 guarantee_property(
2251 valid_symbol_at(signature_index),
2252 "Illegal constant pool index %u for method signature in class file %s",
2253 signature_index, CHECK_NULL);
2254 const Symbol* const signature = cp->symbol_at(signature_index);
2255
2256 if (name == vmSymbols::class_initializer_name()) {
2257 // We ignore the other access flags for a valid class initializer.
2258 // (JVM Spec 2nd ed., chapter 4.6)
2259 if (_major_version < 51) { // backward compatibility
2260 flags = JVM_ACC_STATIC;
2261 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2262 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2263 } else {
2264 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2265 }
2266 } else {
2267 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2268 }
2269
2270 if (name == vmSymbols::object_initializer_name() && is_interface) {
2271 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2272 }
2273
2274 int args_size = -1; // only used when _need_verify is true
2275 if (_need_verify) {
2276 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2277 verify_legal_method_signature(name, signature, CHECK_NULL);
2278 if (args_size > MAX_ARGS_SIZE) {
2279 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2280 }
2281 }
2282
2283 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2284
2285 // Default values for code and exceptions attribute elements
2286 u2 max_stack = 0;
2287 u2 max_locals = 0;
2288 u4 code_length = 0;
2289 const u1* code_start = 0;
2290 u2 exception_table_length = 0;
2291 const u2* exception_table_start = NULL;
2292 Array<int>* exception_handlers = Universe::the_empty_int_array();
2293 u2 checked_exceptions_length = 0;
2294 const u2* checked_exceptions_start = NULL;
2295 CompressedLineNumberWriteStream* linenumber_table = NULL;
2296 int linenumber_table_length = 0;
2297 int total_lvt_length = 0;
2298 u2 lvt_cnt = 0;
2299 u2 lvtt_cnt = 0;
2300 bool lvt_allocated = false;
2301 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2302 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2303 u2* localvariable_table_length = NULL;
2304 const u2** localvariable_table_start = NULL;
2305 u2* localvariable_type_table_length = NULL;
2306 const u2** localvariable_type_table_start = NULL;
2307 int method_parameters_length = -1;
2308 const u1* method_parameters_data = NULL;
2309 bool method_parameters_seen = false;
2310 bool parsed_code_attribute = false;
2311 bool parsed_checked_exceptions_attribute = false;
2312 bool parsed_stackmap_attribute = false;
2313 // stackmap attribute - JDK1.5
2314 const u1* stackmap_data = NULL;
2315 int stackmap_data_length = 0;
2316 u2 generic_signature_index = 0;
2317 MethodAnnotationCollector parsed_annotations;
2318 const u1* runtime_visible_annotations = NULL;
2319 int runtime_visible_annotations_length = 0;
2320 const u1* runtime_invisible_annotations = NULL;
2321 int runtime_invisible_annotations_length = 0;
2322 const u1* runtime_visible_parameter_annotations = NULL;
2323 int runtime_visible_parameter_annotations_length = 0;
2324 const u1* runtime_invisible_parameter_annotations = NULL;
2325 int runtime_invisible_parameter_annotations_length = 0;
2326 const u1* runtime_visible_type_annotations = NULL;
2327 int runtime_visible_type_annotations_length = 0;
2328 const u1* runtime_invisible_type_annotations = NULL;
2329 int runtime_invisible_type_annotations_length = 0;
2330 bool runtime_invisible_annotations_exists = false;
2331 bool runtime_invisible_type_annotations_exists = false;
2332 bool runtime_invisible_parameter_annotations_exists = false;
2333 const u1* annotation_default = NULL;
2334 int annotation_default_length = 0;
2335
2336 // Parse code and exceptions attribute
2337 u2 method_attributes_count = cfs->get_u2_fast();
2338 while (method_attributes_count--) {
2339 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2340 const u2 method_attribute_name_index = cfs->get_u2_fast();
2341 const u4 method_attribute_length = cfs->get_u4_fast();
2342 check_property(
2343 valid_symbol_at(method_attribute_name_index),
2344 "Invalid method attribute name index %u in class file %s",
2345 method_attribute_name_index, CHECK_NULL);
2346
2347 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2348 if (method_attribute_name == vmSymbols::tag_code()) {
2349 // Parse Code attribute
2350 if (_need_verify) {
2351 guarantee_property(
2352 !access_flags.is_native() && !access_flags.is_abstract(),
2353 "Code attribute in native or abstract methods in class file %s",
2354 CHECK_NULL);
2355 }
2356 if (parsed_code_attribute) {
2357 classfile_parse_error("Multiple Code attributes in class file %s",
2358 CHECK_NULL);
2359 }
2360 parsed_code_attribute = true;
2361
2362 // Stack size, locals size, and code size
2363 if (_major_version == 45 && _minor_version <= 2) {
2364 cfs->guarantee_more(4, CHECK_NULL);
2365 max_stack = cfs->get_u1_fast();
2366 max_locals = cfs->get_u1_fast();
2367 code_length = cfs->get_u2_fast();
2368 } else {
2369 cfs->guarantee_more(8, CHECK_NULL);
2370 max_stack = cfs->get_u2_fast();
2371 max_locals = cfs->get_u2_fast();
2372 code_length = cfs->get_u4_fast();
2373 }
2374 if (_need_verify) {
2375 guarantee_property(args_size <= max_locals,
2376 "Arguments can't fit into locals in class file %s",
2377 CHECK_NULL);
2378 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2379 "Invalid method Code length %u in class file %s",
2380 code_length, CHECK_NULL);
2381 }
2382 // Code pointer
2383 code_start = cfs->get_u1_buffer();
2384 assert(code_start != NULL, "null code start");
2385 cfs->guarantee_more(code_length, CHECK_NULL);
2386 cfs->skip_u1_fast(code_length);
2387
2388 // Exception handler table
2389 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2390 exception_table_length = cfs->get_u2_fast();
2391 if (exception_table_length > 0) {
2392 exception_table_start = parse_exception_table(cfs,
2393 code_length,
2394 exception_table_length,
2395 CHECK_NULL);
2396 }
2397
2398 // Parse additional attributes in code attribute
2399 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2400 u2 code_attributes_count = cfs->get_u2_fast();
2401
2402 unsigned int calculated_attribute_length = 0;
2403
2404 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2405 calculated_attribute_length =
2406 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2407 } else {
2408 // max_stack, locals and length are smaller in pre-version 45.2 classes
2409 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2410 }
2411 calculated_attribute_length +=
2412 code_length +
2413 sizeof(exception_table_length) +
2414 sizeof(code_attributes_count) +
2415 exception_table_length *
2416 ( sizeof(u2) + // start_pc
2417 sizeof(u2) + // end_pc
2418 sizeof(u2) + // handler_pc
2419 sizeof(u2) ); // catch_type_index
2420
2421 while (code_attributes_count--) {
2422 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2423 const u2 code_attribute_name_index = cfs->get_u2_fast();
2424 const u4 code_attribute_length = cfs->get_u4_fast();
2425 calculated_attribute_length += code_attribute_length +
2426 sizeof(code_attribute_name_index) +
2427 sizeof(code_attribute_length);
2428 check_property(valid_symbol_at(code_attribute_name_index),
2429 "Invalid code attribute name index %u in class file %s",
2430 code_attribute_name_index,
2431 CHECK_NULL);
2432 if (LoadLineNumberTables &&
2433 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2434 // Parse and compress line number table
2435 parse_linenumber_table(code_attribute_length,
2436 code_length,
2437 &linenumber_table,
2438 CHECK_NULL);
2439
2440 } else if (LoadLocalVariableTables &&
2441 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2442 // Parse local variable table
2443 if (!lvt_allocated) {
2444 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2445 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2446 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2447 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2448 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2449 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2450 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2451 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2452 lvt_allocated = true;
2453 }
2454 if (lvt_cnt == max_lvt_cnt) {
2455 max_lvt_cnt <<= 1;
2456 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2457 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2458 }
2459 localvariable_table_start[lvt_cnt] =
2460 parse_localvariable_table(cfs,
2461 code_length,
2462 max_locals,
2463 code_attribute_length,
2464 &localvariable_table_length[lvt_cnt],
2465 false, // is not LVTT
2466 CHECK_NULL);
2467 total_lvt_length += localvariable_table_length[lvt_cnt];
2468 lvt_cnt++;
2469 } else if (LoadLocalVariableTypeTables &&
2470 _major_version >= JAVA_1_5_VERSION &&
2471 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2472 if (!lvt_allocated) {
2473 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2474 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2475 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2476 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2477 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2478 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2479 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2480 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2481 lvt_allocated = true;
2482 }
2483 // Parse local variable type table
2484 if (lvtt_cnt == max_lvtt_cnt) {
2485 max_lvtt_cnt <<= 1;
2486 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2487 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2488 }
2489 localvariable_type_table_start[lvtt_cnt] =
2490 parse_localvariable_table(cfs,
2491 code_length,
2492 max_locals,
2493 code_attribute_length,
2494 &localvariable_type_table_length[lvtt_cnt],
2495 true, // is LVTT
2496 CHECK_NULL);
2497 lvtt_cnt++;
2498 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2499 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2500 // Stack map is only needed by the new verifier in JDK1.5.
2501 if (parsed_stackmap_attribute) {
2502 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2503 }
2504 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2505 stackmap_data_length = code_attribute_length;
2506 parsed_stackmap_attribute = true;
2507 } else {
2508 // Skip unknown attributes
2509 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2510 }
2511 }
2512 // check method attribute length
2513 if (_need_verify) {
2514 guarantee_property(method_attribute_length == calculated_attribute_length,
2515 "Code segment has wrong length in class file %s",
2516 CHECK_NULL);
2517 }
2518 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2519 // Parse Exceptions attribute
2520 if (parsed_checked_exceptions_attribute) {
2521 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2522 CHECK_NULL);
2523 }
2524 parsed_checked_exceptions_attribute = true;
2525 checked_exceptions_start =
2526 parse_checked_exceptions(cfs,
2527 &checked_exceptions_length,
2528 method_attribute_length,
2529 CHECK_NULL);
2530 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2531 // reject multiple method parameters
2532 if (method_parameters_seen) {
2533 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2534 CHECK_NULL);
2535 }
2536 method_parameters_seen = true;
2537 method_parameters_length = cfs->get_u1_fast();
2538 const u2 real_length = (method_parameters_length * 4u) + 1u;
2539 if (method_attribute_length != real_length) {
2540 classfile_parse_error(
2541 "Invalid MethodParameters method attribute length %u in class file",
2542 method_attribute_length, CHECK_NULL);
2543 }
2544 method_parameters_data = cfs->get_u1_buffer();
2545 cfs->skip_u2_fast(method_parameters_length);
2546 cfs->skip_u2_fast(method_parameters_length);
2547 // ignore this attribute if it cannot be reflected
2548 if (!SystemDictionary::Parameter_klass_loaded())
2549 method_parameters_length = -1;
2550 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2551 if (method_attribute_length != 0) {
2552 classfile_parse_error(
2553 "Invalid Synthetic method attribute length %u in class file %s",
2554 method_attribute_length, CHECK_NULL);
2555 }
2556 // Should we check that there hasn't already been a synthetic attribute?
2557 access_flags.set_is_synthetic();
2558 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2559 if (method_attribute_length != 0) {
2560 classfile_parse_error(
2561 "Invalid Deprecated method attribute length %u in class file %s",
2562 method_attribute_length, CHECK_NULL);
2563 }
2564 } else if (_major_version >= JAVA_1_5_VERSION) {
2565 if (method_attribute_name == vmSymbols::tag_signature()) {
2566 if (method_attribute_length != 2) {
2567 classfile_parse_error(
2568 "Invalid Signature attribute length %u in class file %s",
2569 method_attribute_length, CHECK_NULL);
2570 }
2571 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2572 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2573 if (runtime_visible_annotations != NULL) {
2574 classfile_parse_error(
2575 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2576 CHECK_NULL);
2577 }
2578 runtime_visible_annotations_length = method_attribute_length;
2579 runtime_visible_annotations = cfs->get_u1_buffer();
2580 assert(runtime_visible_annotations != NULL, "null visible annotations");
2581 parse_annotations(cp,
2582 runtime_visible_annotations,
2583 runtime_visible_annotations_length,
2584 &parsed_annotations,
2585 _loader_data,
2586 CHECK_NULL);
2587 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2588 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2589 if (runtime_invisible_annotations_exists) {
2590 classfile_parse_error(
2591 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2592 CHECK_NULL);
2593 }
2594 runtime_invisible_annotations_exists = true;
2595 if (PreserveAllAnnotations) {
2596 runtime_invisible_annotations_length = method_attribute_length;
2597 runtime_invisible_annotations = cfs->get_u1_buffer();
2598 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2599 }
2600 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2601 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2602 if (runtime_visible_parameter_annotations != NULL) {
2603 classfile_parse_error(
2604 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2605 CHECK_NULL);
2606 }
2607 runtime_visible_parameter_annotations_length = method_attribute_length;
2608 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2609 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2610 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2611 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2612 if (runtime_invisible_parameter_annotations_exists) {
2613 classfile_parse_error(
2614 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2615 CHECK_NULL);
2616 }
2617 runtime_invisible_parameter_annotations_exists = true;
2618 if (PreserveAllAnnotations) {
2619 runtime_invisible_parameter_annotations_length = method_attribute_length;
2620 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2621 assert(runtime_invisible_parameter_annotations != NULL,
2622 "null invisible parameter annotations");
2623 }
2624 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2625 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2626 if (annotation_default != NULL) {
2627 classfile_parse_error(
2628 "Multiple AnnotationDefault attributes for method in class file %s",
2629 CHECK_NULL);
2630 }
2631 annotation_default_length = method_attribute_length;
2632 annotation_default = cfs->get_u1_buffer();
2633 assert(annotation_default != NULL, "null annotation default");
2634 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2635 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2636 if (runtime_visible_type_annotations != NULL) {
2637 classfile_parse_error(
2638 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2639 CHECK_NULL);
2640 }
2641 runtime_visible_type_annotations_length = method_attribute_length;
2642 runtime_visible_type_annotations = cfs->get_u1_buffer();
2643 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2644 // No need for the VM to parse Type annotations
2645 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2646 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2647 if (runtime_invisible_type_annotations_exists) {
2648 classfile_parse_error(
2649 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2650 CHECK_NULL);
2651 } else {
2652 runtime_invisible_type_annotations_exists = true;
2653 }
2654 if (PreserveAllAnnotations) {
2655 runtime_invisible_type_annotations_length = method_attribute_length;
2656 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2657 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2658 }
2659 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2660 } else {
2661 // Skip unknown attributes
2662 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2663 }
2664 } else {
2665 // Skip unknown attributes
2666 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2667 }
2668 }
2669
2670 if (linenumber_table != NULL) {
2671 linenumber_table->write_terminator();
2672 linenumber_table_length = linenumber_table->position();
2673 }
2674
2675 // Make sure there's at least one Code attribute in non-native/non-abstract method
2676 if (_need_verify) {
2677 guarantee_property(access_flags.is_native() ||
2678 access_flags.is_abstract() ||
2679 parsed_code_attribute,
2680 "Absent Code attribute in method that is not native or abstract in class file %s",
2681 CHECK_NULL);
2682 }
2683
2684 // All sizing information for a Method* is finally available, now create it
2685 InlineTableSizes sizes(
2686 total_lvt_length,
2687 linenumber_table_length,
2688 exception_table_length,
2689 checked_exceptions_length,
2690 method_parameters_length,
2691 generic_signature_index,
2692 runtime_visible_annotations_length +
2693 runtime_invisible_annotations_length,
2694 runtime_visible_parameter_annotations_length +
2695 runtime_invisible_parameter_annotations_length,
2696 runtime_visible_type_annotations_length +
2697 runtime_invisible_type_annotations_length,
2698 annotation_default_length,
2699 0);
2700
2701 Method* const m = Method::allocate(_loader_data,
2702 code_length,
2703 access_flags,
2704 &sizes,
2705 ConstMethod::NORMAL,
2706 CHECK_NULL);
2707
2708 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2709
2710 // Fill in information from fixed part (access_flags already set)
2711 m->set_constants(_cp);
2712 m->set_name_index(name_index);
2713 m->set_signature_index(signature_index);
2714 #ifdef CC_INTERP
2715 // hmm is there a gc issue here??
2716 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2717 m->set_result_index(rtf.type());
2718 #endif
2719
2720 if (args_size >= 0) {
2721 m->set_size_of_parameters(args_size);
2722 } else {
2723 m->compute_size_of_parameters(THREAD);
2724 }
2725 #ifdef ASSERT
2726 if (args_size >= 0) {
2727 m->compute_size_of_parameters(THREAD);
2728 assert(args_size == m->size_of_parameters(), "");
2729 }
2730 #endif
2731
2732 // Fill in code attribute information
2733 m->set_max_stack(max_stack);
2734 m->set_max_locals(max_locals);
2735 if (stackmap_data != NULL) {
2736 m->constMethod()->copy_stackmap_data(_loader_data,
2737 (u1*)stackmap_data,
2738 stackmap_data_length,
2739 CHECK_NULL);
2740 }
2741
2742 // Copy byte codes
2743 m->set_code((u1*)code_start);
2744
2745 // Copy line number table
2746 if (linenumber_table != NULL) {
2747 memcpy(m->compressed_linenumber_table(),
2748 linenumber_table->buffer(),
2749 linenumber_table_length);
2750 }
2751
2752 // Copy exception table
2753 if (exception_table_length > 0) {
2754 int size =
2755 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2756 copy_u2_with_conversion((u2*) m->exception_table_start(),
2757 exception_table_start, size);
2758 }
2759
2760 // Copy method parameters
2761 if (method_parameters_length > 0) {
2762 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2763 for (int i = 0; i < method_parameters_length; i++) {
2764 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2765 method_parameters_data += 2;
2766 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2767 method_parameters_data += 2;
2768 }
2769 }
2770
2771 // Copy checked exceptions
2772 if (checked_exceptions_length > 0) {
2773 const int size =
2774 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2775 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2776 checked_exceptions_start,
2777 size);
2778 }
2779
2780 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2781 if (total_lvt_length > 0) {
2782 promoted_flags->set_has_localvariable_table();
2783 copy_localvariable_table(m->constMethod(),
2784 lvt_cnt,
2785 localvariable_table_length,
2786 localvariable_table_start,
2787 lvtt_cnt,
2788 localvariable_type_table_length,
2789 localvariable_type_table_start,
2790 CHECK_NULL);
2791 }
2792
2793 if (parsed_annotations.has_any_annotations())
2794 parsed_annotations.apply_to(m);
2795
2796 // Copy annotations
2797 copy_method_annotations(m->constMethod(),
2798 runtime_visible_annotations,
2799 runtime_visible_annotations_length,
2800 runtime_invisible_annotations,
2801 runtime_invisible_annotations_length,
2802 runtime_visible_parameter_annotations,
2803 runtime_visible_parameter_annotations_length,
2804 runtime_invisible_parameter_annotations,
2805 runtime_invisible_parameter_annotations_length,
2806 runtime_visible_type_annotations,
2807 runtime_visible_type_annotations_length,
2808 runtime_invisible_type_annotations,
2809 runtime_invisible_type_annotations_length,
2810 annotation_default,
2811 annotation_default_length,
2812 CHECK_NULL);
2813
2814 if (name == vmSymbols::finalize_method_name() &&
2815 signature == vmSymbols::void_method_signature()) {
2816 if (m->is_empty_method()) {
2817 _has_empty_finalizer = true;
2818 } else {
2819 _has_finalizer = true;
2820 }
2821 }
2822 if (name == vmSymbols::object_initializer_name() &&
2823 signature == vmSymbols::void_method_signature() &&
2824 m->is_vanilla_constructor()) {
2825 _has_vanilla_constructor = true;
2826 }
2827
2828 NOT_PRODUCT(m->verify());
2829 return m;
2830 }
2831
2832
2833 // The promoted_flags parameter is used to pass relevant access_flags
2834 // from the methods back up to the containing klass. These flag values
2835 // are added to klass's access_flags.
2836 // Side-effects: populates the _methods field in the parser
2837 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2838 bool is_interface,
2839 AccessFlags* promoted_flags,
2840 bool* has_final_method,
2841 bool* declares_default_methods,
2842 TRAPS) {
2843 assert(cfs != NULL, "invariant");
2844 assert(promoted_flags != NULL, "invariant");
2845 assert(has_final_method != NULL, "invariant");
2846 assert(declares_default_methods != NULL, "invariant");
2847
2848 assert(NULL == _methods, "invariant");
2849
2850 cfs->guarantee_more(2, CHECK); // length
2851 const u2 length = cfs->get_u2_fast();
2852 if (length == 0) {
2853 _methods = Universe::the_empty_method_array();
2854 } else {
2855 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2856 length,
2857 NULL,
2858 CHECK);
2859
2860 HandleMark hm(THREAD);
2861 for (int index = 0; index < length; index++) {
2862 Method* method = parse_method(cfs,
2863 is_interface,
2864 _cp,
2865 promoted_flags,
2866 CHECK);
2867
2868 if (method->is_final()) {
2869 *has_final_method = true;
2870 }
2871 // declares_default_methods: declares concrete instance methods, any access flags
2872 // used for interface initialization, and default method inheritance analysis
2873 if (is_interface && !(*declares_default_methods)
2874 && !method->is_abstract() && !method->is_static()) {
2875 *declares_default_methods = true;
2876 }
2877 _methods->at_put(index, method);
2878 }
2879
2880 if (_need_verify && length > 1) {
2881 // Check duplicated methods
2882 ResourceMark rm(THREAD);
2883 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2884 THREAD, NameSigHash*, HASH_ROW_SIZE);
2885 initialize_hashtable(names_and_sigs);
2886 bool dup = false;
2887 {
2888 debug_only(NoSafepointVerifier nsv;)
2889 for (int i = 0; i < length; i++) {
2890 const Method* const m = _methods->at(i);
2891 // If no duplicates, add name/signature in hashtable names_and_sigs.
2892 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2893 dup = true;
2894 break;
2895 }
2896 }
2897 }
2898 if (dup) {
2899 classfile_parse_error("Duplicate method name&signature in class file %s",
2900 CHECK);
2901 }
2902 }
2903 }
2904 }
2905
2906 static const intArray* sort_methods(Array<Method*>* methods) {
2907 const int length = methods->length();
2908 // If JVMTI original method ordering or sharing is enabled we have to
2909 // remember the original class file ordering.
2910 // We temporarily use the vtable_index field in the Method* to store the
2911 // class file index, so we can read in after calling qsort.
2912 // Put the method ordering in the shared archive.
2913 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2914 for (int index = 0; index < length; index++) {
2915 Method* const m = methods->at(index);
2916 assert(!m->valid_vtable_index(), "vtable index should not be set");
2917 m->set_vtable_index(index);
2918 }
2919 }
2920 // Sort method array by ascending method name (for faster lookups & vtable construction)
2921 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2922 Method::sort_methods(methods);
2923
2924 intArray* method_ordering = NULL;
2925 // If JVMTI original method ordering or sharing is enabled construct int
2926 // array remembering the original ordering
2927 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2928 method_ordering = new intArray(length);
2929 for (int index = 0; index < length; index++) {
2930 Method* const m = methods->at(index);
2931 const int old_index = m->vtable_index();
2932 assert(old_index >= 0 && old_index < length, "invalid method index");
2933 method_ordering->at_put(index, old_index);
2934 m->set_vtable_index(Method::invalid_vtable_index);
2935 }
2936 }
2937 return method_ordering;
2938 }
2939
2940 // Parse generic_signature attribute for methods and fields
2941 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2942 TRAPS) {
2943 assert(cfs != NULL, "invariant");
2944
2945 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2946 const u2 generic_signature_index = cfs->get_u2_fast();
2947 check_property(
2948 valid_symbol_at(generic_signature_index),
2949 "Invalid Signature attribute at constant pool index %u in class file %s",
2950 generic_signature_index, CHECK_0);
2951 return generic_signature_index;
2952 }
2953
2954 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2955 TRAPS) {
2956
2957 assert(cfs != NULL, "invariant");
2958
2959 cfs->guarantee_more(2, CHECK); // sourcefile_index
2960 const u2 sourcefile_index = cfs->get_u2_fast();
2961 check_property(
2962 valid_symbol_at(sourcefile_index),
2963 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2964 sourcefile_index, CHECK);
2965 set_class_sourcefile_index(sourcefile_index);
2966 }
2967
2968 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2969 int length,
2970 TRAPS) {
2971 assert(cfs != NULL, "invariant");
2972
2973 const u1* const sde_buffer = cfs->get_u1_buffer();
2974 assert(sde_buffer != NULL, "null sde buffer");
2975
2976 // Don't bother storing it if there is no way to retrieve it
2977 if (JvmtiExport::can_get_source_debug_extension()) {
2978 assert((length+1) > length, "Overflow checking");
2979 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2980 for (int i = 0; i < length; i++) {
2981 sde[i] = sde_buffer[i];
2982 }
2983 sde[length] = '\0';
2984 set_class_sde_buffer((const char*)sde, length);
2985 }
2986 // Got utf8 string, set stream position forward
2987 cfs->skip_u1(length, CHECK);
2988 }
2989
2990
2991 // Inner classes can be static, private or protected (classic VM does this)
2992 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2993 JVM_ACC_PRIVATE | \
2994 JVM_ACC_PROTECTED | \
2995 JVM_ACC_STATIC \
2996 )
2997
2998 // Return number of classes in the inner classes attribute table
2999 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3000 const u1* const inner_classes_attribute_start,
3001 bool parsed_enclosingmethod_attribute,
3002 u2 enclosing_method_class_index,
3003 u2 enclosing_method_method_index,
3004 TRAPS) {
3005 const u1* const current_mark = cfs->current();
3006 u2 length = 0;
3007 if (inner_classes_attribute_start != NULL) {
3008 cfs->set_current(inner_classes_attribute_start);
3009 cfs->guarantee_more(2, CHECK_0); // length
3010 length = cfs->get_u2_fast();
3011 }
3012
3013 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3014 // method data:
3015 // [inner_class_info_index,
3016 // outer_class_info_index,
3017 // inner_name_index,
3018 // inner_class_access_flags,
3019 // ...
3020 // enclosing_method_class_index,
3021 // enclosing_method_method_index]
3022 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3023 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3024 _inner_classes = inner_classes;
3025
3026 int index = 0;
3027 const int cp_size = _cp->length();
3028 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3029 for (int n = 0; n < length; n++) {
3030 // Inner class index
3031 const u2 inner_class_info_index = cfs->get_u2_fast();
3032 check_property(
3033 valid_klass_reference_at(inner_class_info_index),
3034 "inner_class_info_index %u has bad constant type in class file %s",
3035 inner_class_info_index, CHECK_0);
3036 // Outer class index
3037 const u2 outer_class_info_index = cfs->get_u2_fast();
3038 check_property(
3039 outer_class_info_index == 0 ||
3040 valid_klass_reference_at(outer_class_info_index),
3041 "outer_class_info_index %u has bad constant type in class file %s",
3042 outer_class_info_index, CHECK_0);
3043 // Inner class name
3044 const u2 inner_name_index = cfs->get_u2_fast();
3045 check_property(
3046 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3047 "inner_name_index %u has bad constant type in class file %s",
3048 inner_name_index, CHECK_0);
3049 if (_need_verify) {
3050 guarantee_property(inner_class_info_index != outer_class_info_index,
3051 "Class is both outer and inner class in class file %s", CHECK_0);
3052 }
3053 // Access flags
3054 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3055 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3056 // Set abstract bit for old class files for backward compatibility
3057 flags |= JVM_ACC_ABSTRACT;
3058 }
3059 verify_legal_class_modifiers(flags, CHECK_0);
3060 AccessFlags inner_access_flags(flags);
3061
3062 inner_classes->at_put(index++, inner_class_info_index);
3063 inner_classes->at_put(index++, outer_class_info_index);
3064 inner_classes->at_put(index++, inner_name_index);
3065 inner_classes->at_put(index++, inner_access_flags.as_short());
3066 }
3067
3068 // 4347400: make sure there's no duplicate entry in the classes array
3069 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3070 for(int i = 0; i < length * 4; i += 4) {
3071 for(int j = i + 4; j < length * 4; j += 4) {
3072 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3073 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3074 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3075 inner_classes->at(i+3) != inner_classes->at(j+3)),
3076 "Duplicate entry in InnerClasses in class file %s",
3077 CHECK_0);
3078 }
3079 }
3080 }
3081
3082 // Set EnclosingMethod class and method indexes.
3083 if (parsed_enclosingmethod_attribute) {
3084 inner_classes->at_put(index++, enclosing_method_class_index);
3085 inner_classes->at_put(index++, enclosing_method_method_index);
3086 }
3087 assert(index == size, "wrong size");
3088
3089 // Restore buffer's current position.
3090 cfs->set_current(current_mark);
3091
3092 return length;
3093 }
3094
3095 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3096 set_class_synthetic_flag(true);
3097 }
3098
3099 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3100 assert(cfs != NULL, "invariant");
3101
3102 const u2 signature_index = cfs->get_u2(CHECK);
3103 check_property(
3104 valid_symbol_at(signature_index),
3105 "Invalid constant pool index %u in Signature attribute in class file %s",
3106 signature_index, CHECK);
3107 set_class_generic_signature_index(signature_index);
3108 }
3109
3110 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3111 ConstantPool* cp,
3112 u4 attribute_byte_length,
3113 TRAPS) {
3114 assert(cfs != NULL, "invariant");
3115 assert(cp != NULL, "invariant");
3116
3117 const u1* const current_start = cfs->current();
3118
3119 guarantee_property(attribute_byte_length >= sizeof(u2),
3120 "Invalid BootstrapMethods attribute length %u in class file %s",
3121 attribute_byte_length,
3122 CHECK);
3123
3124 cfs->guarantee_more(attribute_byte_length, CHECK);
3125
3126 const int attribute_array_length = cfs->get_u2_fast();
3127
3128 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3129 "Short length on BootstrapMethods in class file %s",
3130 CHECK);
3131
3132
3133 // The attribute contains a counted array of counted tuples of shorts,
3134 // represending bootstrap specifiers:
3135 // length*{bootstrap_method_index, argument_count*{argument_index}}
3136 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3137 // operand_count = number of shorts in attr, except for leading length
3138
3139 // The attribute is copied into a short[] array.
3140 // The array begins with a series of short[2] pairs, one for each tuple.
3141 const int index_size = (attribute_array_length * 2);
3142
3143 Array<u2>* const operands =
3144 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3145
3146 // Eagerly assign operands so they will be deallocated with the constant
3147 // pool if there is an error.
3148 cp->set_operands(operands);
3149
3150 int operand_fill_index = index_size;
3151 const int cp_size = cp->length();
3152
3153 for (int n = 0; n < attribute_array_length; n++) {
3154 // Store a 32-bit offset into the header of the operand array.
3155 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3156
3157 // Read a bootstrap specifier.
3158 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3159 const u2 bootstrap_method_index = cfs->get_u2_fast();
3160 const u2 argument_count = cfs->get_u2_fast();
3161 check_property(
3162 valid_cp_range(bootstrap_method_index, cp_size) &&
3163 cp->tag_at(bootstrap_method_index).is_method_handle(),
3164 "bootstrap_method_index %u has bad constant type in class file %s",
3165 bootstrap_method_index,
3166 CHECK);
3167
3168 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3169 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3170 CHECK);
3171
3172 operands->at_put(operand_fill_index++, bootstrap_method_index);
3173 operands->at_put(operand_fill_index++, argument_count);
3174
3175 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3176 for (int j = 0; j < argument_count; j++) {
3177 const u2 argument_index = cfs->get_u2_fast();
3178 check_property(
3179 valid_cp_range(argument_index, cp_size) &&
3180 cp->tag_at(argument_index).is_loadable_constant(),
3181 "argument_index %u has bad constant type in class file %s",
3182 argument_index,
3183 CHECK);
3184 operands->at_put(operand_fill_index++, argument_index);
3185 }
3186 }
3187 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3188 "Bad length on BootstrapMethods in class file %s",
3189 CHECK);
3190 }
3191
3192 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3193 ConstantPool* cp,
3194 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3195 TRAPS) {
3196 assert(cfs != NULL, "invariant");
3197 assert(cp != NULL, "invariant");
3198 assert(parsed_annotations != NULL, "invariant");
3199
3200 // Set inner classes attribute to default sentinel
3201 _inner_classes = Universe::the_empty_short_array();
3202 cfs->guarantee_more(2, CHECK); // attributes_count
3203 u2 attributes_count = cfs->get_u2_fast();
3204 bool parsed_sourcefile_attribute = false;
3205 bool parsed_innerclasses_attribute = false;
3206 bool parsed_enclosingmethod_attribute = false;
3207 bool parsed_bootstrap_methods_attribute = false;
3208 const u1* runtime_visible_annotations = NULL;
3209 int runtime_visible_annotations_length = 0;
3210 const u1* runtime_invisible_annotations = NULL;
3211 int runtime_invisible_annotations_length = 0;
3212 const u1* runtime_visible_type_annotations = NULL;
3213 int runtime_visible_type_annotations_length = 0;
3214 const u1* runtime_invisible_type_annotations = NULL;
3215 int runtime_invisible_type_annotations_length = 0;
3216 bool runtime_invisible_type_annotations_exists = false;
3217 bool runtime_invisible_annotations_exists = false;
3218 bool parsed_source_debug_ext_annotations_exist = false;
3219 const u1* inner_classes_attribute_start = NULL;
3220 u4 inner_classes_attribute_length = 0;
3221 u2 enclosing_method_class_index = 0;
3222 u2 enclosing_method_method_index = 0;
3223 // Iterate over attributes
3224 while (attributes_count--) {
3225 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3226 const u2 attribute_name_index = cfs->get_u2_fast();
3227 const u4 attribute_length = cfs->get_u4_fast();
3228 check_property(
3229 valid_symbol_at(attribute_name_index),
3230 "Attribute name has bad constant pool index %u in class file %s",
3231 attribute_name_index, CHECK);
3232 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3233 if (tag == vmSymbols::tag_source_file()) {
3234 // Check for SourceFile tag
3235 if (_need_verify) {
3236 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3237 }
3238 if (parsed_sourcefile_attribute) {
3239 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3240 } else {
3241 parsed_sourcefile_attribute = true;
3242 }
3243 parse_classfile_sourcefile_attribute(cfs, CHECK);
3244 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3245 // Check for SourceDebugExtension tag
3246 if (parsed_source_debug_ext_annotations_exist) {
3247 classfile_parse_error(
3248 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3249 }
3250 parsed_source_debug_ext_annotations_exist = true;
3251 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3252 } else if (tag == vmSymbols::tag_inner_classes()) {
3253 // Check for InnerClasses tag
3254 if (parsed_innerclasses_attribute) {
3255 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3256 } else {
3257 parsed_innerclasses_attribute = true;
3258 }
3259 inner_classes_attribute_start = cfs->get_u1_buffer();
3260 inner_classes_attribute_length = attribute_length;
3261 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3262 } else if (tag == vmSymbols::tag_synthetic()) {
3263 // Check for Synthetic tag
3264 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3265 if (attribute_length != 0) {
3266 classfile_parse_error(
3267 "Invalid Synthetic classfile attribute length %u in class file %s",
3268 attribute_length, CHECK);
3269 }
3270 parse_classfile_synthetic_attribute(CHECK);
3271 } else if (tag == vmSymbols::tag_deprecated()) {
3272 // Check for Deprecatd tag - 4276120
3273 if (attribute_length != 0) {
3274 classfile_parse_error(
3275 "Invalid Deprecated classfile attribute length %u in class file %s",
3276 attribute_length, CHECK);
3277 }
3278 } else if (_major_version >= JAVA_1_5_VERSION) {
3279 if (tag == vmSymbols::tag_signature()) {
3280 if (attribute_length != 2) {
3281 classfile_parse_error(
3282 "Wrong Signature attribute length %u in class file %s",
3283 attribute_length, CHECK);
3284 }
3285 parse_classfile_signature_attribute(cfs, CHECK);
3286 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3287 if (runtime_visible_annotations != NULL) {
3288 classfile_parse_error(
3289 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3290 }
3291 runtime_visible_annotations_length = attribute_length;
3292 runtime_visible_annotations = cfs->get_u1_buffer();
3293 assert(runtime_visible_annotations != NULL, "null visible annotations");
3294 parse_annotations(cp,
3295 runtime_visible_annotations,
3296 runtime_visible_annotations_length,
3297 parsed_annotations,
3298 _loader_data,
3299 CHECK);
3300 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3301 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3302 if (runtime_invisible_annotations_exists) {
3303 classfile_parse_error(
3304 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3305 }
3306 runtime_invisible_annotations_exists = true;
3307 if (PreserveAllAnnotations) {
3308 runtime_invisible_annotations_length = attribute_length;
3309 runtime_invisible_annotations = cfs->get_u1_buffer();
3310 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3311 }
3312 cfs->skip_u1(attribute_length, CHECK);
3313 } else if (tag == vmSymbols::tag_enclosing_method()) {
3314 if (parsed_enclosingmethod_attribute) {
3315 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3316 } else {
3317 parsed_enclosingmethod_attribute = true;
3318 }
3319 guarantee_property(attribute_length == 4,
3320 "Wrong EnclosingMethod attribute length %u in class file %s",
3321 attribute_length, CHECK);
3322 cfs->guarantee_more(4, CHECK); // class_index, method_index
3323 enclosing_method_class_index = cfs->get_u2_fast();
3324 enclosing_method_method_index = cfs->get_u2_fast();
3325 if (enclosing_method_class_index == 0) {
3326 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3327 }
3328 // Validate the constant pool indices and types
3329 check_property(valid_klass_reference_at(enclosing_method_class_index),
3330 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3331 if (enclosing_method_method_index != 0 &&
3332 (!cp->is_within_bounds(enclosing_method_method_index) ||
3333 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3334 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3335 }
3336 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3337 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3338 if (parsed_bootstrap_methods_attribute)
3339 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3340 parsed_bootstrap_methods_attribute = true;
3341 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3342 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3343 if (runtime_visible_type_annotations != NULL) {
3344 classfile_parse_error(
3345 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3346 }
3347 runtime_visible_type_annotations_length = attribute_length;
3348 runtime_visible_type_annotations = cfs->get_u1_buffer();
3349 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3350 // No need for the VM to parse Type annotations
3351 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3352 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3353 if (runtime_invisible_type_annotations_exists) {
3354 classfile_parse_error(
3355 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3356 } else {
3357 runtime_invisible_type_annotations_exists = true;
3358 }
3359 if (PreserveAllAnnotations) {
3360 runtime_invisible_type_annotations_length = attribute_length;
3361 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3362 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3363 }
3364 cfs->skip_u1(attribute_length, CHECK);
3365 } else {
3366 // Unknown attribute
3367 cfs->skip_u1(attribute_length, CHECK);
3368 }
3369 } else {
3370 // Unknown attribute
3371 cfs->skip_u1(attribute_length, CHECK);
3372 }
3373 }
3374 _annotations = assemble_annotations(runtime_visible_annotations,
3375 runtime_visible_annotations_length,
3376 runtime_invisible_annotations,
3377 runtime_invisible_annotations_length,
3378 CHECK);
3379 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3380 runtime_visible_type_annotations_length,
3381 runtime_invisible_type_annotations,
3382 runtime_invisible_type_annotations_length,
3383 CHECK);
3384
3385 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3386 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3387 cfs,
3388 inner_classes_attribute_start,
3389 parsed_innerclasses_attribute,
3390 enclosing_method_class_index,
3391 enclosing_method_method_index,
3392 CHECK);
3393 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3394 guarantee_property(
3395 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3396 "Wrong InnerClasses attribute length in class file %s", CHECK);
3397 }
3398 }
3399
3400 if (_max_bootstrap_specifier_index >= 0) {
3401 guarantee_property(parsed_bootstrap_methods_attribute,
3402 "Missing BootstrapMethods attribute in class file %s", CHECK);
3403 }
3404 }
3405
3406 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3407 assert(k != NULL, "invariant");
3408
3409 if (_synthetic_flag)
3410 k->set_is_synthetic();
3411 if (_sourcefile_index != 0) {
3412 k->set_source_file_name_index(_sourcefile_index);
3413 }
3414 if (_generic_signature_index != 0) {
3415 k->set_generic_signature_index(_generic_signature_index);
3416 }
3417 if (_sde_buffer != NULL) {
3418 k->set_source_debug_extension(_sde_buffer, _sde_length);
3419 }
3420 }
3421
3422 // Create the Annotations object that will
3423 // hold the annotations array for the Klass.
3424 void ClassFileParser::create_combined_annotations(TRAPS) {
3425 if (_annotations == NULL &&
3426 _type_annotations == NULL &&
3427 _fields_annotations == NULL &&
3428 _fields_type_annotations == NULL) {
3429 // Don't create the Annotations object unnecessarily.
3430 return;
3431 }
3432
3433 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3434 annotations->set_class_annotations(_annotations);
3435 annotations->set_class_type_annotations(_type_annotations);
3436 annotations->set_fields_annotations(_fields_annotations);
3437 annotations->set_fields_type_annotations(_fields_type_annotations);
3438
3439 // This is the Annotations object that will be
3440 // assigned to InstanceKlass being constructed.
3441 _combined_annotations = annotations;
3442
3443 // The annotations arrays below has been transfered the
3444 // _combined_annotations so these fields can now be cleared.
3445 _annotations = NULL;
3446 _type_annotations = NULL;
3447 _fields_annotations = NULL;
3448 _fields_type_annotations = NULL;
3449 }
3450
3451 // Transfer ownership of metadata allocated to the InstanceKlass.
3452 void ClassFileParser::apply_parsed_class_metadata(
3453 InstanceKlass* this_klass,
3454 int java_fields_count, TRAPS) {
3455 assert(this_klass != NULL, "invariant");
3456
3457 _cp->set_pool_holder(this_klass);
3458 this_klass->set_constants(_cp);
3459 this_klass->set_fields(_fields, java_fields_count);
3460 this_klass->set_methods(_methods);
3461 this_klass->set_inner_classes(_inner_classes);
3462 this_klass->set_local_interfaces(_local_interfaces);
3463 this_klass->set_transitive_interfaces(_transitive_interfaces);
3464 this_klass->set_annotations(_combined_annotations);
3465
3466 // Clear out these fields so they don't get deallocated by the destructor
3467 clear_class_metadata();
3468 }
3469
3470 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3471 int runtime_visible_annotations_length,
3472 const u1* const runtime_invisible_annotations,
3473 int runtime_invisible_annotations_length,
3474 TRAPS) {
3475 AnnotationArray* annotations = NULL;
3476 if (runtime_visible_annotations != NULL ||
3477 runtime_invisible_annotations != NULL) {
3478 annotations = MetadataFactory::new_array<u1>(_loader_data,
3479 runtime_visible_annotations_length +
3480 runtime_invisible_annotations_length,
3481 CHECK_(annotations));
3482 if (runtime_visible_annotations != NULL) {
3483 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3484 annotations->at_put(i, runtime_visible_annotations[i]);
3485 }
3486 }
3487 if (runtime_invisible_annotations != NULL) {
3488 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3489 int append = runtime_visible_annotations_length+i;
3490 annotations->at_put(append, runtime_invisible_annotations[i]);
3491 }
3492 }
3493 }
3494 return annotations;
3495 }
3496
3497 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3498 const int super_class_index,
3499 const bool need_verify,
3500 TRAPS) {
3501 assert(cp != NULL, "invariant");
3502 const InstanceKlass* super_klass = NULL;
3503
3504 if (super_class_index == 0) {
3505 check_property(_class_name == vmSymbols::java_lang_Object(),
3506 "Invalid superclass index %u in class file %s",
3507 super_class_index,
3508 CHECK_NULL);
3509 } else {
3510 check_property(valid_klass_reference_at(super_class_index),
3511 "Invalid superclass index %u in class file %s",
3512 super_class_index,
3513 CHECK_NULL);
3514 // The class name should be legal because it is checked when parsing constant pool.
3515 // However, make sure it is not an array type.
3516 bool is_array = false;
3517 if (cp->tag_at(super_class_index).is_klass()) {
3518 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3519 if (need_verify)
3520 is_array = super_klass->is_array_klass();
3521 } else if (need_verify) {
3522 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3523 }
3524 if (need_verify) {
3525 guarantee_property(!is_array,
3526 "Bad superclass name in class file %s", CHECK_NULL);
3527 }
3528 }
3529 return super_klass;
3530 }
3531
3532 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3533 unsigned int nonstatic_oop_map_count,
3534 int first_nonstatic_oop_offset) {
3535
3536 unsigned int map_count =
3537 NULL == super ? 0 : super->nonstatic_oop_map_count();
3538 if (nonstatic_oop_map_count > 0) {
3539 // We have oops to add to map
3540 if (map_count == 0) {
3541 map_count = nonstatic_oop_map_count;
3542 }
3543 else {
3544 // Check whether we should add a new map block or whether the last one can
3545 // be extended
3546 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3547 const OopMapBlock* const last_map = first_map + map_count - 1;
3548
3549 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3550 if (next_offset == first_nonstatic_oop_offset) {
3551 // There is no gap bettwen superklass's last oop field and first
3552 // local oop field, merge maps.
3553 nonstatic_oop_map_count -= 1;
3554 }
3555 else {
3556 // Superklass didn't end with a oop field, add extra maps
3557 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3558 }
3559 map_count += nonstatic_oop_map_count;
3560 }
3561 }
3562 return map_count;
3563 }
3564
3565 #ifndef PRODUCT
3566 static void print_field_layout(const Symbol* name,
3567 Array<u2>* fields,
3568 constantPoolHandle cp,
3569 int instance_size,
3570 int instance_fields_start,
3571 int instance_fields_end,
3572 int static_fields_end) {
3573
3574 assert(name != NULL, "invariant");
3575
3576 tty->print("%s: field layout\n", name->as_klass_external_name());
3577 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3578 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3579 if (!fs.access_flags().is_static()) {
3580 tty->print(" @%3d \"%s\" %s\n",
3581 fs.offset(),
3582 fs.name()->as_klass_external_name(),
3583 fs.signature()->as_klass_external_name());
3584 }
3585 }
3586 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3587 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3588 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3589 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3590 if (fs.access_flags().is_static()) {
3591 tty->print(" @%3d \"%s\" %s\n",
3592 fs.offset(),
3593 fs.name()->as_klass_external_name(),
3594 fs.signature()->as_klass_external_name());
3595 }
3596 }
3597 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3598 tty->print("\n");
3599 }
3600 #endif
3601
3602 // Values needed for oopmap and InstanceKlass creation
3603 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3604 public:
3605 int* nonstatic_oop_offsets;
3606 unsigned int* nonstatic_oop_counts;
3607 unsigned int nonstatic_oop_map_count;
3608 unsigned int total_oop_map_count;
3609 int instance_size;
3610 int nonstatic_field_size;
3611 int static_field_size;
3612 bool has_nonstatic_fields;
3613 };
3614
3615 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3616 void ClassFileParser::layout_fields(ConstantPool* cp,
3617 const FieldAllocationCount* fac,
3618 const ClassAnnotationCollector* parsed_annotations,
3619 FieldLayoutInfo* info,
3620 TRAPS) {
3621
3622 assert(cp != NULL, "invariant");
3623
3624 // Field size and offset computation
3625 int nonstatic_field_size = _super_klass == NULL ? 0 :
3626 _super_klass->nonstatic_field_size();
3627
3628 // Count the contended fields by type.
3629 //
3630 // We ignore static fields, because @Contended is not supported for them.
3631 // The layout code below will also ignore the static fields.
3632 int nonstatic_contended_count = 0;
3633 FieldAllocationCount fac_contended;
3634 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3635 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3636 if (fs.is_contended()) {
3637 fac_contended.count[atype]++;
3638 if (!fs.access_flags().is_static()) {
3639 nonstatic_contended_count++;
3640 }
3641 }
3642 }
3643
3644
3645 // Calculate the starting byte offsets
3646 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3647 int next_static_double_offset = next_static_oop_offset +
3648 ((fac->count[STATIC_OOP]) * heapOopSize);
3649 if ( fac->count[STATIC_DOUBLE] &&
3650 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3651 Universe::field_type_should_be_aligned(T_LONG)) ) {
3652 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3653 }
3654
3655 int next_static_word_offset = next_static_double_offset +
3656 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3657 int next_static_short_offset = next_static_word_offset +
3658 ((fac->count[STATIC_WORD]) * BytesPerInt);
3659 int next_static_byte_offset = next_static_short_offset +
3660 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3661
3662 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3663 nonstatic_field_size * heapOopSize;
3664
3665 int next_nonstatic_field_offset = nonstatic_fields_start;
3666
3667 const bool is_contended_class = parsed_annotations->is_contended();
3668
3669 // Class is contended, pad before all the fields
3670 if (is_contended_class) {
3671 next_nonstatic_field_offset += ContendedPaddingWidth;
3672 }
3673
3674 // Compute the non-contended fields count.
3675 // The packing code below relies on these counts to determine if some field
3676 // can be squeezed into the alignment gap. Contended fields are obviously
3677 // exempt from that.
3678 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3679 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3680 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3681 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3682 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3683
3684 // Total non-static fields count, including every contended field
3685 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3686 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3687 fac->count[NONSTATIC_OOP];
3688
3689 const bool super_has_nonstatic_fields =
3690 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3691 const bool has_nonstatic_fields =
3692 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3693
3694
3695 // Prepare list of oops for oop map generation.
3696 //
3697 // "offset" and "count" lists are describing the set of contiguous oop
3698 // regions. offset[i] is the start of the i-th region, which then has
3699 // count[i] oops following. Before we know how many regions are required,
3700 // we pessimistically allocate the maps to fit all the oops into the
3701 // distinct regions.
3702 //
3703 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3704 // to figure out if we still need to do this.
3705 unsigned int nonstatic_oop_map_count = 0;
3706 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3707
3708 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3709 THREAD, int, max_nonstatic_oop_maps);
3710 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3711 THREAD, unsigned int, max_nonstatic_oop_maps);
3712
3713 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3714
3715 bool compact_fields = CompactFields;
3716 int allocation_style = FieldsAllocationStyle;
3717 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3718 assert(false, "0 <= FieldsAllocationStyle <= 2");
3719 allocation_style = 1; // Optimistic
3720 }
3721
3722 // The next classes have predefined hard-coded fields offsets
3723 // (see in JavaClasses::compute_hard_coded_offsets()).
3724 // Use default fields allocation order for them.
3725 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3726 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3727 _class_name == vmSymbols::java_lang_Class() ||
3728 _class_name == vmSymbols::java_lang_ClassLoader() ||
3729 _class_name == vmSymbols::java_lang_ref_Reference() ||
3730 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3731 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3732 _class_name == vmSymbols::java_lang_String() ||
3733 _class_name == vmSymbols::java_lang_Throwable() ||
3734 _class_name == vmSymbols::java_lang_Boolean() ||
3735 _class_name == vmSymbols::java_lang_Character() ||
3736 _class_name == vmSymbols::java_lang_Float() ||
3737 _class_name == vmSymbols::java_lang_Double() ||
3738 _class_name == vmSymbols::java_lang_Byte() ||
3739 _class_name == vmSymbols::java_lang_Short() ||
3740 _class_name == vmSymbols::java_lang_Integer() ||
3741 _class_name == vmSymbols::java_lang_Long())) {
3742 allocation_style = 0; // Allocate oops first
3743 compact_fields = false; // Don't compact fields
3744 }
3745
3746 int next_nonstatic_oop_offset = 0;
3747 int next_nonstatic_double_offset = 0;
3748
3749 // Rearrange fields for a given allocation style
3750 if( allocation_style == 0 ) {
3751 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3752 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3753 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3754 (nonstatic_oop_count * heapOopSize);
3755 } else if( allocation_style == 1 ) {
3756 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3757 next_nonstatic_double_offset = next_nonstatic_field_offset;
3758 } else if( allocation_style == 2 ) {
3759 // Fields allocation: oops fields in super and sub classes are together.
3760 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3761 _super_klass->nonstatic_oop_map_size() > 0 ) {
3762 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3763 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3764 const OopMapBlock* const last_map = first_map + map_count - 1;
3765 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3766 if (next_offset == next_nonstatic_field_offset) {
3767 allocation_style = 0; // allocate oops first
3768 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3769 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3770 (nonstatic_oop_count * heapOopSize);
3771 }
3772 }
3773 if( allocation_style == 2 ) {
3774 allocation_style = 1; // allocate oops last
3775 next_nonstatic_double_offset = next_nonstatic_field_offset;
3776 }
3777 } else {
3778 ShouldNotReachHere();
3779 }
3780
3781 int nonstatic_oop_space_count = 0;
3782 int nonstatic_word_space_count = 0;
3783 int nonstatic_short_space_count = 0;
3784 int nonstatic_byte_space_count = 0;
3785 int nonstatic_oop_space_offset = 0;
3786 int nonstatic_word_space_offset = 0;
3787 int nonstatic_short_space_offset = 0;
3788 int nonstatic_byte_space_offset = 0;
3789
3790 // Try to squeeze some of the fields into the gaps due to
3791 // long/double alignment.
3792 if (nonstatic_double_count > 0) {
3793 int offset = next_nonstatic_double_offset;
3794 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3795 if (compact_fields && offset != next_nonstatic_double_offset) {
3796 // Allocate available fields into the gap before double field.
3797 int length = next_nonstatic_double_offset - offset;
3798 assert(length == BytesPerInt, "");
3799 nonstatic_word_space_offset = offset;
3800 if (nonstatic_word_count > 0) {
3801 nonstatic_word_count -= 1;
3802 nonstatic_word_space_count = 1; // Only one will fit
3803 length -= BytesPerInt;
3804 offset += BytesPerInt;
3805 }
3806 nonstatic_short_space_offset = offset;
3807 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3808 nonstatic_short_count -= 1;
3809 nonstatic_short_space_count += 1;
3810 length -= BytesPerShort;
3811 offset += BytesPerShort;
3812 }
3813 nonstatic_byte_space_offset = offset;
3814 while (length > 0 && nonstatic_byte_count > 0) {
3815 nonstatic_byte_count -= 1;
3816 nonstatic_byte_space_count += 1;
3817 length -= 1;
3818 }
3819 // Allocate oop field in the gap if there are no other fields for that.
3820 nonstatic_oop_space_offset = offset;
3821 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3822 allocation_style != 0) { // when oop fields not first
3823 nonstatic_oop_count -= 1;
3824 nonstatic_oop_space_count = 1; // Only one will fit
3825 length -= heapOopSize;
3826 offset += heapOopSize;
3827 }
3828 }
3829 }
3830
3831 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3832 (nonstatic_double_count * BytesPerLong);
3833 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3834 (nonstatic_word_count * BytesPerInt);
3835 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3836 (nonstatic_short_count * BytesPerShort);
3837 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3838 nonstatic_byte_count;
3839
3840 // let oops jump before padding with this allocation style
3841 if( allocation_style == 1 ) {
3842 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3843 if( nonstatic_oop_count > 0 ) {
3844 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3845 }
3846 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3847 }
3848
3849 // Iterate over fields again and compute correct offsets.
3850 // The field allocation type was temporarily stored in the offset slot.
3851 // oop fields are located before non-oop fields (static and non-static).
3852 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3853
3854 // skip already laid out fields
3855 if (fs.is_offset_set()) continue;
3856
3857 // contended instance fields are handled below
3858 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3859
3860 int real_offset = 0;
3861 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3862
3863 // pack the rest of the fields
3864 switch (atype) {
3865 case STATIC_OOP:
3866 real_offset = next_static_oop_offset;
3867 next_static_oop_offset += heapOopSize;
3868 break;
3869 case STATIC_BYTE:
3870 real_offset = next_static_byte_offset;
3871 next_static_byte_offset += 1;
3872 break;
3873 case STATIC_SHORT:
3874 real_offset = next_static_short_offset;
3875 next_static_short_offset += BytesPerShort;
3876 break;
3877 case STATIC_WORD:
3878 real_offset = next_static_word_offset;
3879 next_static_word_offset += BytesPerInt;
3880 break;
3881 case STATIC_DOUBLE:
3882 real_offset = next_static_double_offset;
3883 next_static_double_offset += BytesPerLong;
3884 break;
3885 case NONSTATIC_OOP:
3886 if( nonstatic_oop_space_count > 0 ) {
3887 real_offset = nonstatic_oop_space_offset;
3888 nonstatic_oop_space_offset += heapOopSize;
3889 nonstatic_oop_space_count -= 1;
3890 } else {
3891 real_offset = next_nonstatic_oop_offset;
3892 next_nonstatic_oop_offset += heapOopSize;
3893 }
3894
3895 // Record this oop in the oop maps
3896 if( nonstatic_oop_map_count > 0 &&
3897 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3898 real_offset -
3899 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3900 heapOopSize ) {
3901 // This oop is adjacent to the previous one, add to current oop map
3902 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3903 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3904 } else {
3905 // This oop is not adjacent to the previous one, create new oop map
3906 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3907 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3908 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3909 nonstatic_oop_map_count += 1;
3910 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3911 first_nonstatic_oop_offset = real_offset;
3912 }
3913 }
3914 break;
3915 case NONSTATIC_BYTE:
3916 if( nonstatic_byte_space_count > 0 ) {
3917 real_offset = nonstatic_byte_space_offset;
3918 nonstatic_byte_space_offset += 1;
3919 nonstatic_byte_space_count -= 1;
3920 } else {
3921 real_offset = next_nonstatic_byte_offset;
3922 next_nonstatic_byte_offset += 1;
3923 }
3924 break;
3925 case NONSTATIC_SHORT:
3926 if( nonstatic_short_space_count > 0 ) {
3927 real_offset = nonstatic_short_space_offset;
3928 nonstatic_short_space_offset += BytesPerShort;
3929 nonstatic_short_space_count -= 1;
3930 } else {
3931 real_offset = next_nonstatic_short_offset;
3932 next_nonstatic_short_offset += BytesPerShort;
3933 }
3934 break;
3935 case NONSTATIC_WORD:
3936 if( nonstatic_word_space_count > 0 ) {
3937 real_offset = nonstatic_word_space_offset;
3938 nonstatic_word_space_offset += BytesPerInt;
3939 nonstatic_word_space_count -= 1;
3940 } else {
3941 real_offset = next_nonstatic_word_offset;
3942 next_nonstatic_word_offset += BytesPerInt;
3943 }
3944 break;
3945 case NONSTATIC_DOUBLE:
3946 real_offset = next_nonstatic_double_offset;
3947 next_nonstatic_double_offset += BytesPerLong;
3948 break;
3949 default:
3950 ShouldNotReachHere();
3951 }
3952 fs.set_offset(real_offset);
3953 }
3954
3955
3956 // Handle the contended cases.
3957 //
3958 // Each contended field should not intersect the cache line with another contended field.
3959 // In the absence of alignment information, we end up with pessimistically separating
3960 // the fields with full-width padding.
3961 //
3962 // Additionally, this should not break alignment for the fields, so we round the alignment up
3963 // for each field.
3964 if (nonstatic_contended_count > 0) {
3965
3966 // if there is at least one contended field, we need to have pre-padding for them
3967 next_nonstatic_padded_offset += ContendedPaddingWidth;
3968
3969 // collect all contended groups
3970 BitMap bm(cp->size());
3971 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3972 // skip already laid out fields
3973 if (fs.is_offset_set()) continue;
3974
3975 if (fs.is_contended()) {
3976 bm.set_bit(fs.contended_group());
3977 }
3978 }
3979
3980 int current_group = -1;
3981 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3982
3983 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3984
3985 // skip already laid out fields
3986 if (fs.is_offset_set()) continue;
3987
3988 // skip non-contended fields and fields from different group
3989 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3990
3991 // handle statics below
3992 if (fs.access_flags().is_static()) continue;
3993
3994 int real_offset = 0;
3995 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3996
3997 switch (atype) {
3998 case NONSTATIC_BYTE:
3999 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4000 real_offset = next_nonstatic_padded_offset;
4001 next_nonstatic_padded_offset += 1;
4002 break;
4003
4004 case NONSTATIC_SHORT:
4005 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4006 real_offset = next_nonstatic_padded_offset;
4007 next_nonstatic_padded_offset += BytesPerShort;
4008 break;
4009
4010 case NONSTATIC_WORD:
4011 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4012 real_offset = next_nonstatic_padded_offset;
4013 next_nonstatic_padded_offset += BytesPerInt;
4014 break;
4015
4016 case NONSTATIC_DOUBLE:
4017 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4018 real_offset = next_nonstatic_padded_offset;
4019 next_nonstatic_padded_offset += BytesPerLong;
4020 break;
4021
4022 case NONSTATIC_OOP:
4023 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4024 real_offset = next_nonstatic_padded_offset;
4025 next_nonstatic_padded_offset += heapOopSize;
4026
4027 // Record this oop in the oop maps
4028 if( nonstatic_oop_map_count > 0 &&
4029 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4030 real_offset -
4031 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4032 heapOopSize ) {
4033 // This oop is adjacent to the previous one, add to current oop map
4034 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4035 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4036 } else {
4037 // This oop is not adjacent to the previous one, create new oop map
4038 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4039 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4040 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4041 nonstatic_oop_map_count += 1;
4042 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4043 first_nonstatic_oop_offset = real_offset;
4044 }
4045 }
4046 break;
4047
4048 default:
4049 ShouldNotReachHere();
4050 }
4051
4052 if (fs.contended_group() == 0) {
4053 // Contended group defines the equivalence class over the fields:
4054 // the fields within the same contended group are not inter-padded.
4055 // The only exception is default group, which does not incur the
4056 // equivalence, and so requires intra-padding.
4057 next_nonstatic_padded_offset += ContendedPaddingWidth;
4058 }
4059
4060 fs.set_offset(real_offset);
4061 } // for
4062
4063 // Start laying out the next group.
4064 // Note that this will effectively pad the last group in the back;
4065 // this is expected to alleviate memory contention effects for
4066 // subclass fields and/or adjacent object.
4067 // If this was the default group, the padding is already in place.
4068 if (current_group != 0) {
4069 next_nonstatic_padded_offset += ContendedPaddingWidth;
4070 }
4071 }
4072
4073 // handle static fields
4074 }
4075
4076 // Entire class is contended, pad in the back.
4077 // This helps to alleviate memory contention effects for subclass fields
4078 // and/or adjacent object.
4079 if (is_contended_class) {
4080 next_nonstatic_padded_offset += ContendedPaddingWidth;
4081 }
4082
4083 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4084
4085 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4086 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4087 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4088
4089 int static_field_size = (static_fields_end -
4090 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4091 nonstatic_field_size = nonstatic_field_size +
4092 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4093
4094 int instance_size = align_object_size(instance_end / wordSize);
4095
4096 assert(instance_size == align_object_size(align_size_up(
4097 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4098 wordSize) / wordSize), "consistent layout helper value");
4099
4100 // Invariant: nonstatic_field end/start should only change if there are
4101 // nonstatic fields in the class, or if the class is contended. We compare
4102 // against the non-aligned value, so that end alignment will not fail the
4103 // assert without actually having the fields.
4104 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4105 is_contended_class ||
4106 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4107
4108 // Number of non-static oop map blocks allocated at end of klass.
4109 const unsigned int total_oop_map_count =
4110 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4111 first_nonstatic_oop_offset);
4112
4113 #ifndef PRODUCT
4114 if (PrintFieldLayout) {
4115 print_field_layout(_class_name,
4116 _fields,
4117 cp,
4118 instance_size,
4119 nonstatic_fields_start,
4120 nonstatic_fields_end,
4121 static_fields_end);
4122 }
4123
4124 #endif
4125 // Pass back information needed for InstanceKlass creation
4126 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4127 info->nonstatic_oop_counts = nonstatic_oop_counts;
4128 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4129 info->total_oop_map_count = total_oop_map_count;
4130 info->instance_size = instance_size;
4131 info->static_field_size = static_field_size;
4132 info->nonstatic_field_size = nonstatic_field_size;
4133 info->has_nonstatic_fields = has_nonstatic_fields;
4134 }
4135
4136 static void fill_oop_maps(const InstanceKlass* k,
4137 unsigned int nonstatic_oop_map_count,
4138 const int* nonstatic_oop_offsets,
4139 const unsigned int* nonstatic_oop_counts) {
4140
4141 assert(k != NULL, "invariant");
4142
4143 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4144 const InstanceKlass* const super = k->superklass();
4145 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4146 if (super_count > 0) {
4147 // Copy maps from superklass
4148 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4149 for (unsigned int i = 0; i < super_count; ++i) {
4150 *this_oop_map++ = *super_oop_map++;
4151 }
4152 }
4153
4154 if (nonstatic_oop_map_count > 0) {
4155 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4156 // The counts differ because there is no gap between superklass's last oop
4157 // field and the first local oop field. Extend the last oop map copied
4158 // from the superklass instead of creating new one.
4159 nonstatic_oop_map_count--;
4160 nonstatic_oop_offsets++;
4161 this_oop_map--;
4162 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4163 this_oop_map++;
4164 }
4165
4166 // Add new map blocks, fill them
4167 while (nonstatic_oop_map_count-- > 0) {
4168 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4169 this_oop_map->set_count(*nonstatic_oop_counts++);
4170 this_oop_map++;
4171 }
4172 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4173 this_oop_map, "sanity");
4174 }
4175 }
4176
4177
4178 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4179 assert(ik != NULL, "invariant");
4180
4181 const Klass* const super = ik->super();
4182
4183 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4184 // in which case we don't have to register objects as finalizable
4185 if (!_has_empty_finalizer) {
4186 if (_has_finalizer ||
4187 (super != NULL && super->has_finalizer())) {
4188 ik->set_has_finalizer();
4189 }
4190 }
4191
4192 #ifdef ASSERT
4193 bool f = false;
4194 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4195 vmSymbols::void_method_signature());
4196 if (m != NULL && !m->is_empty_method()) {
4197 f = true;
4198 }
4199
4200 // Spec doesn't prevent agent from redefinition of empty finalizer.
4201 // Despite the fact that it's generally bad idea and redefined finalizer
4202 // will not work as expected we shouldn't abort vm in this case
4203 if (!ik->has_redefined_this_or_super()) {
4204 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4205 }
4206 #endif
4207
4208 // Check if this klass supports the java.lang.Cloneable interface
4209 if (SystemDictionary::Cloneable_klass_loaded()) {
4210 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4211 ik->set_is_cloneable();
4212 }
4213 }
4214
4215 // Check if this klass has a vanilla default constructor
4216 if (super == NULL) {
4217 // java.lang.Object has empty default constructor
4218 ik->set_has_vanilla_constructor();
4219 } else {
4220 if (super->has_vanilla_constructor() &&
4221 _has_vanilla_constructor) {
4222 ik->set_has_vanilla_constructor();
4223 }
4224 #ifdef ASSERT
4225 bool v = false;
4226 if (super->has_vanilla_constructor()) {
4227 const Method* const constructor =
4228 ik->find_method(vmSymbols::object_initializer_name(),
4229 vmSymbols::void_method_signature());
4230 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4231 v = true;
4232 }
4233 }
4234 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4235 #endif
4236 }
4237
4238 // If it cannot be fast-path allocated, set a bit in the layout helper.
4239 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4240 assert(ik->size_helper() > 0, "layout_helper is initialized");
4241 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4242 || ik->is_abstract() || ik->is_interface()
4243 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4244 || ik->size_helper() >= FastAllocateSizeLimit) {
4245 // Forbid fast-path allocation.
4246 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4247 ik->set_layout_helper(lh);
4248 }
4249 }
4250
4251 // Attach super classes and interface classes to class loader data
4252 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4253 TRAPS) {
4254 assert(defined_klass != NULL, "invariant");
4255
4256 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4257 if (defining_loader_data->is_the_null_class_loader_data()) {
4258 // Dependencies to null class loader data are implicit.
4259 return;
4260 } else {
4261 // add super class dependency
4262 Klass* const super = defined_klass->super();
4263 if (super != NULL) {
4264 defining_loader_data->record_dependency(super, CHECK);
4265 }
4266
4267 // add super interface dependencies
4268 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4269 if (local_interfaces != NULL) {
4270 const int length = local_interfaces->length();
4271 for (int i = 0; i < length; i++) {
4272 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4273 }
4274 }
4275 }
4276 }
4277
4278 // utility methods for appending an array with check for duplicates
4279
4280 static void append_interfaces(GrowableArray<Klass*>* result,
4281 const Array<Klass*>* const ifs) {
4282 // iterate over new interfaces
4283 for (int i = 0; i < ifs->length(); i++) {
4284 Klass* const e = ifs->at(i);
4285 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4286 // add new interface
4287 result->append_if_missing(e);
4288 }
4289 }
4290
4291 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4292 Array<Klass*>* local_ifs,
4293 ClassLoaderData* loader_data,
4294 TRAPS) {
4295 assert(local_ifs != NULL, "invariant");
4296 assert(loader_data != NULL, "invariant");
4297
4298 // Compute maximum size for transitive interfaces
4299 int max_transitive_size = 0;
4300 int super_size = 0;
4301 // Add superclass transitive interfaces size
4302 if (super != NULL) {
4303 super_size = super->transitive_interfaces()->length();
4304 max_transitive_size += super_size;
4305 }
4306 // Add local interfaces' super interfaces
4307 const int local_size = local_ifs->length();
4308 for (int i = 0; i < local_size; i++) {
4309 Klass* const l = local_ifs->at(i);
4310 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4311 }
4312 // Finally add local interfaces
4313 max_transitive_size += local_size;
4314 // Construct array
4315 if (max_transitive_size == 0) {
4316 // no interfaces, use canonicalized array
4317 return Universe::the_empty_klass_array();
4318 } else if (max_transitive_size == super_size) {
4319 // no new local interfaces added, share superklass' transitive interface array
4320 return super->transitive_interfaces();
4321 } else if (max_transitive_size == local_size) {
4322 // only local interfaces added, share local interface array
4323 return local_ifs;
4324 } else {
4325 ResourceMark rm;
4326 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4327
4328 // Copy down from superclass
4329 if (super != NULL) {
4330 append_interfaces(result, super->transitive_interfaces());
4331 }
4332
4333 // Copy down from local interfaces' superinterfaces
4334 for (int i = 0; i < local_size; i++) {
4335 Klass* const l = local_ifs->at(i);
4336 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4337 }
4338 // Finally add local interfaces
4339 append_interfaces(result, local_ifs);
4340
4341 // length will be less than the max_transitive_size if duplicates were removed
4342 const int length = result->length();
4343 assert(length <= max_transitive_size, "just checking");
4344 Array<Klass*>* const new_result =
4345 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4346 for (int i = 0; i < length; i++) {
4347 Klass* const e = result->at(i);
4348 assert(e != NULL, "just checking");
4349 new_result->at_put(i, e);
4350 }
4351 return new_result;
4352 }
4353 }
4354
4355 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4356 assert(this_klass != NULL, "invariant");
4357 const Klass* const super = this_klass->super();
4358 if ((super != NULL) &&
4359 (!Reflection::verify_class_access(this_klass, super, false))) {
4360 ResourceMark rm(THREAD);
4361 Exceptions::fthrow(
4362 THREAD_AND_LOCATION,
4363 vmSymbols::java_lang_IllegalAccessError(),
4364 "class %s cannot access its superclass %s",
4365 this_klass->external_name(),
4366 super->external_name()
4367 );
4368 return;
4369 }
4370 }
4371
4372
4373 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4374 assert(this_klass != NULL, "invariant");
4375 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4376 const int lng = local_interfaces->length();
4377 for (int i = lng - 1; i >= 0; i--) {
4378 Klass* const k = local_interfaces->at(i);
4379 assert (k != NULL && k->is_interface(), "invalid interface");
4380 if (!Reflection::verify_class_access(this_klass, k, false)) {
4381 ResourceMark rm(THREAD);
4382 Exceptions::fthrow(
4383 THREAD_AND_LOCATION,
4384 vmSymbols::java_lang_IllegalAccessError(),
4385 "class %s cannot access its superinterface %s",
4386 this_klass->external_name(),
4387 k->external_name()
4388 );
4389 return;
4390 }
4391 }
4392 }
4393
4394
4395 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4396 assert(this_klass != NULL, "invariant");
4397 const Array<Method*>* const methods = this_klass->methods();
4398 const int num_methods = methods->length();
4399
4400 // go thru each method and check if it overrides a final method
4401 for (int index = 0; index < num_methods; index++) {
4402 const Method* const m = methods->at(index);
4403
4404 // skip private, static, and <init> methods
4405 if ((!m->is_private() && !m->is_static()) &&
4406 (m->name() != vmSymbols::object_initializer_name())) {
4407
4408 const Symbol* const name = m->name();
4409 const Symbol* const signature = m->signature();
4410 const Klass* k = this_klass->super();
4411 const Method* super_m = NULL;
4412 while (k != NULL) {
4413 // skip supers that don't have final methods.
4414 if (k->has_final_method()) {
4415 // lookup a matching method in the super class hierarchy
4416 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4417 if (super_m == NULL) {
4418 break; // didn't find any match; get out
4419 }
4420
4421 if (super_m->is_final() && !super_m->is_static() &&
4422 // matching method in super is final, and not static
4423 (Reflection::verify_field_access(this_klass,
4424 super_m->method_holder(),
4425 super_m->method_holder(),
4426 super_m->access_flags(), false))
4427 // this class can access super final method and therefore override
4428 ) {
4429 ResourceMark rm(THREAD);
4430 Exceptions::fthrow(
4431 THREAD_AND_LOCATION,
4432 vmSymbols::java_lang_VerifyError(),
4433 "class %s overrides final method %s.%s%s",
4434 this_klass->external_name(),
4435 super_m->method_holder()->external_name(),
4436 name->as_C_string(),
4437 signature->as_C_string()
4438 );
4439 return;
4440 }
4441
4442 // continue to look from super_m's holder's super.
4443 k = super_m->method_holder()->super();
4444 continue;
4445 }
4446
4447 k = k->super();
4448 }
4449 }
4450 }
4451 }
4452
4453
4454 // assumes that this_klass is an interface
4455 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4456 assert(this_klass != NULL, "invariant");
4457 assert(this_klass->is_interface(), "not an interface");
4458 const Array<Method*>* methods = this_klass->methods();
4459 const int num_methods = methods->length();
4460
4461 for (int index = 0; index < num_methods; index++) {
4462 const Method* const m = methods->at(index);
4463 // if m is static and not the init method, throw a verify error
4464 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4465 ResourceMark rm(THREAD);
4466 Exceptions::fthrow(
4467 THREAD_AND_LOCATION,
4468 vmSymbols::java_lang_VerifyError(),
4469 "Illegal static method %s in interface %s",
4470 m->name()->as_C_string(),
4471 this_klass->external_name()
4472 );
4473 return;
4474 }
4475 }
4476 }
4477
4478 // utility methods for format checking
4479
4480 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4481 if (!_need_verify) { return; }
4482
4483 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4484 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4485 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4486 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4487 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4488 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4489 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4490
4491 if ((is_abstract && is_final) ||
4492 (is_interface && !is_abstract) ||
4493 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4494 (!is_interface && major_gte_15 && is_annotation)) {
4495 ResourceMark rm(THREAD);
4496 Exceptions::fthrow(
4497 THREAD_AND_LOCATION,
4498 vmSymbols::java_lang_ClassFormatError(),
4499 "Illegal class modifiers in class %s: 0x%X",
4500 _class_name->as_C_string(), flags
4501 );
4502 return;
4503 }
4504 }
4505
4506 static bool has_illegal_visibility(jint flags) {
4507 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4508 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4509 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4510
4511 return ((is_public && is_protected) ||
4512 (is_public && is_private) ||
4513 (is_protected && is_private));
4514 }
4515
4516 static bool is_supported_version(u2 major, u2 minor){
4517 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4518 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4519 (major <= max_version) &&
4520 ((major != max_version) ||
4521 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4522 }
4523
4524 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4525 bool is_interface,
4526 TRAPS) const {
4527 if (!_need_verify) { return; }
4528
4529 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4530 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4531 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4532 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4533 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4534 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4535 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4536 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4537 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4538
4539 bool is_illegal = false;
4540
4541 if (is_interface) {
4542 if (!is_public || !is_static || !is_final || is_private ||
4543 is_protected || is_volatile || is_transient ||
4544 (major_gte_15 && is_enum)) {
4545 is_illegal = true;
4546 }
4547 } else { // not interface
4548 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4549 is_illegal = true;
4550 }
4551 }
4552
4553 if (is_illegal) {
4554 ResourceMark rm(THREAD);
4555 Exceptions::fthrow(
4556 THREAD_AND_LOCATION,
4557 vmSymbols::java_lang_ClassFormatError(),
4558 "Illegal field modifiers in class %s: 0x%X",
4559 _class_name->as_C_string(), flags);
4560 return;
4561 }
4562 }
4563
4564 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4565 bool is_interface,
4566 const Symbol* name,
4567 TRAPS) const {
4568 if (!_need_verify) { return; }
4569
4570 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4571 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4572 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4573 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4574 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4575 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4576 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4577 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4578 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4579 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4580 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4581 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4582 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4583
4584 bool is_illegal = false;
4585
4586 if (is_interface) {
4587 if (major_gte_8) {
4588 // Class file version is JAVA_8_VERSION or later Methods of
4589 // interfaces may set any of the flags except ACC_PROTECTED,
4590 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4591 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4592 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4593 (is_native || is_protected || is_final || is_synchronized) ||
4594 // If a specific method of a class or interface has its
4595 // ACC_ABSTRACT flag set, it must not have any of its
4596 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4597 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4598 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4599 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4600 (is_abstract && (is_private || is_static || is_strict))) {
4601 is_illegal = true;
4602 }
4603 } else if (major_gte_15) {
4604 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4605 if (!is_public || is_static || is_final || is_synchronized ||
4606 is_native || !is_abstract || is_strict) {
4607 is_illegal = true;
4608 }
4609 } else {
4610 // Class file version is pre-JAVA_1_5_VERSION
4611 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4612 is_illegal = true;
4613 }
4614 }
4615 } else { // not interface
4616 if (has_illegal_visibility(flags)) {
4617 is_illegal = true;
4618 } else {
4619 if (is_initializer) {
4620 if (is_static || is_final || is_synchronized || is_native ||
4621 is_abstract || (major_gte_15 && is_bridge)) {
4622 is_illegal = true;
4623 }
4624 } else { // not initializer
4625 if (is_abstract) {
4626 if ((is_final || is_native || is_private || is_static ||
4627 (major_gte_15 && (is_synchronized || is_strict)))) {
4628 is_illegal = true;
4629 }
4630 }
4631 }
4632 }
4633 }
4634
4635 if (is_illegal) {
4636 ResourceMark rm(THREAD);
4637 Exceptions::fthrow(
4638 THREAD_AND_LOCATION,
4639 vmSymbols::java_lang_ClassFormatError(),
4640 "Method %s in class %s has illegal modifiers: 0x%X",
4641 name->as_C_string(), _class_name->as_C_string(), flags);
4642 return;
4643 }
4644 }
4645
4646 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4647 int length,
4648 TRAPS) const {
4649 assert(_need_verify, "only called when _need_verify is true");
4650 int i = 0;
4651 const int count = length >> 2;
4652 for (int k=0; k<count; k++) {
4653 unsigned char b0 = buffer[i];
4654 unsigned char b1 = buffer[i+1];
4655 unsigned char b2 = buffer[i+2];
4656 unsigned char b3 = buffer[i+3];
4657 // For an unsigned char v,
4658 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4659 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4660 const unsigned char res = b0 | b0 - 1 |
4661 b1 | b1 - 1 |
4662 b2 | b2 - 1 |
4663 b3 | b3 - 1;
4664 if (res >= 128) break;
4665 i += 4;
4666 }
4667 for(; i < length; i++) {
4668 unsigned short c;
4669 // no embedded zeros
4670 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4671 if(buffer[i] < 128) {
4672 continue;
4673 }
4674 if ((i + 5) < length) { // see if it's legal supplementary character
4675 if (UTF8::is_supplementary_character(&buffer[i])) {
4676 c = UTF8::get_supplementary_character(&buffer[i]);
4677 i += 5;
4678 continue;
4679 }
4680 }
4681 switch (buffer[i] >> 4) {
4682 default: break;
4683 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4684 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4685 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4686 c = (buffer[i] & 0x1F) << 6;
4687 i++;
4688 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4689 c += buffer[i] & 0x3F;
4690 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4691 // for classes with major > 47, c must a null or a character in its shortest form
4692 break;
4693 }
4694 }
4695 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4696 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4697 c = (buffer[i] & 0xF) << 12;
4698 i += 2;
4699 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4700 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4701 if (_major_version <= 47 || c >= 0x800) {
4702 // for classes with major > 47, c must be in its shortest form
4703 break;
4704 }
4705 }
4706 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4707 } // end of switch
4708 } // end of for
4709 }
4710
4711 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4712 // Method names also may not contain the characters '<' or '>', unless <init>
4713 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4714 // method. Because these names have been checked as special cases before
4715 // calling this method in verify_legal_method_name.
4716 static bool verify_unqualified_name(const char* name,
4717 unsigned int length,
4718 int type) {
4719 for (const char* p = name; p != name + length;) {
4720 jchar ch = *p;
4721 if (ch < 128) {
4722 p++;
4723 if (ch == '.' || ch == ';' || ch == '[') {
4724 return false; // do not permit '.', ';', or '['
4725 }
4726 if (type != LegalClass && ch == '/') {
4727 return false; // do not permit '/' unless it's class name
4728 }
4729 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4730 return false; // do not permit '<' or '>' in method names
4731 }
4732 }
4733 else {
4734 char* tmp_p = UTF8::next(p, &ch);
4735 p = tmp_p;
4736 }
4737 }
4738 return true;
4739 }
4740
4741 // Take pointer to a string. Skip over the longest part of the string that could
4742 // be taken as a fieldname. Allow '/' if slash_ok is true.
4743 // Return a pointer to just past the fieldname.
4744 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4745 // being true, we saw consecutive slashes (meaning we were looking for a
4746 // qualified path but found something that was badly-formed).
4747 static const char* skip_over_field_name(const char* name,
4748 bool slash_ok,
4749 unsigned int length) {
4750 const char* p;
4751 jboolean last_is_slash = false;
4752 jboolean not_first_ch = false;
4753
4754 for (p = name; p != name + length; not_first_ch = true) {
4755 const char* old_p = p;
4756 jchar ch = *p;
4757 if (ch < 128) {
4758 p++;
4759 // quick check for ascii
4760 if ((ch >= 'a' && ch <= 'z') ||
4761 (ch >= 'A' && ch <= 'Z') ||
4762 (ch == '_' || ch == '$') ||
4763 (not_first_ch && ch >= '0' && ch <= '9')) {
4764 last_is_slash = false;
4765 continue;
4766 }
4767 if (slash_ok && ch == '/') {
4768 if (last_is_slash) {
4769 return NULL; // Don't permit consecutive slashes
4770 }
4771 last_is_slash = true;
4772 continue;
4773 }
4774 }
4775 else {
4776 jint unicode_ch;
4777 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4778 p = tmp_p;
4779 last_is_slash = false;
4780 // Check if ch is Java identifier start or is Java identifier part
4781 // 4672820: call java.lang.Character methods directly without generating separate tables.
4782 EXCEPTION_MARK;
4783
4784 // return value
4785 JavaValue result(T_BOOLEAN);
4786 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4787 JavaCallArguments args;
4788 args.push_int(unicode_ch);
4789
4790 // public static boolean isJavaIdentifierStart(char ch);
4791 JavaCalls::call_static(&result,
4792 SystemDictionary::Character_klass(),
4793 vmSymbols::isJavaIdentifierStart_name(),
4794 vmSymbols::int_bool_signature(),
4795 &args,
4796 THREAD);
4797
4798 if (HAS_PENDING_EXCEPTION) {
4799 CLEAR_PENDING_EXCEPTION;
4800 return 0;
4801 }
4802 if (result.get_jboolean()) {
4803 continue;
4804 }
4805
4806 if (not_first_ch) {
4807 // public static boolean isJavaIdentifierPart(char ch);
4808 JavaCalls::call_static(&result,
4809 SystemDictionary::Character_klass(),
4810 vmSymbols::isJavaIdentifierPart_name(),
4811 vmSymbols::int_bool_signature(),
4812 &args,
4813 THREAD);
4814
4815 if (HAS_PENDING_EXCEPTION) {
4816 CLEAR_PENDING_EXCEPTION;
4817 return 0;
4818 }
4819
4820 if (result.get_jboolean()) {
4821 continue;
4822 }
4823 }
4824 }
4825 return (not_first_ch) ? old_p : NULL;
4826 }
4827 return (not_first_ch) ? p : NULL;
4828 }
4829
4830 // Take pointer to a string. Skip over the longest part of the string that could
4831 // be taken as a field signature. Allow "void" if void_ok.
4832 // Return a pointer to just past the signature.
4833 // Return NULL if no legal signature is found.
4834 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4835 bool void_ok,
4836 unsigned int length,
4837 TRAPS) const {
4838 unsigned int array_dim = 0;
4839 while (length > 0) {
4840 switch (signature[0]) {
4841 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4842 case JVM_SIGNATURE_BOOLEAN:
4843 case JVM_SIGNATURE_BYTE:
4844 case JVM_SIGNATURE_CHAR:
4845 case JVM_SIGNATURE_SHORT:
4846 case JVM_SIGNATURE_INT:
4847 case JVM_SIGNATURE_FLOAT:
4848 case JVM_SIGNATURE_LONG:
4849 case JVM_SIGNATURE_DOUBLE:
4850 return signature + 1;
4851 case JVM_SIGNATURE_CLASS: {
4852 if (_major_version < JAVA_1_5_VERSION) {
4853 // Skip over the class name if one is there
4854 const char* const p = skip_over_field_name(signature + 1, true, --length);
4855
4856 // The next character better be a semicolon
4857 if (p && (p - signature) > 1 && p[0] == ';') {
4858 return p + 1;
4859 }
4860 }
4861 else {
4862 // 4900761: For class version > 48, any unicode is allowed in class name.
4863 length--;
4864 signature++;
4865 while (length > 0 && signature[0] != ';') {
4866 if (signature[0] == '.') {
4867 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4868 }
4869 length--;
4870 signature++;
4871 }
4872 if (signature[0] == ';') { return signature + 1; }
4873 }
4874
4875 return NULL;
4876 }
4877 case JVM_SIGNATURE_ARRAY:
4878 array_dim++;
4879 if (array_dim > 255) {
4880 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4881 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4882 }
4883 // The rest of what's there better be a legal signature
4884 signature++;
4885 length--;
4886 void_ok = false;
4887 break;
4888
4889 default:
4890 return NULL;
4891 }
4892 }
4893 return NULL;
4894 }
4895
4896 // Checks if name is a legal class name.
4897 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4898 if (!_need_verify || _relax_verify) { return; }
4899
4900 char buf[fixed_buffer_size];
4901 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4902 unsigned int length = name->utf8_length();
4903 bool legal = false;
4904
4905 if (length > 0) {
4906 const char* p;
4907 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4908 p = skip_over_field_signature(bytes, false, length, CHECK);
4909 legal = (p != NULL) && ((p - bytes) == (int)length);
4910 } else if (_major_version < JAVA_1_5_VERSION) {
4911 if (bytes[0] != '<') {
4912 p = skip_over_field_name(bytes, true, length);
4913 legal = (p != NULL) && ((p - bytes) == (int)length);
4914 }
4915 } else {
4916 // 4900761: relax the constraints based on JSR202 spec
4917 // Class names may be drawn from the entire Unicode character set.
4918 // Identifiers between '/' must be unqualified names.
4919 // The utf8 string has been verified when parsing cpool entries.
4920 legal = verify_unqualified_name(bytes, length, LegalClass);
4921 }
4922 }
4923 if (!legal) {
4924 ResourceMark rm(THREAD);
4925 assert(_class_name != NULL, "invariant");
4926 Exceptions::fthrow(
4927 THREAD_AND_LOCATION,
4928 vmSymbols::java_lang_ClassFormatError(),
4929 "Illegal class name \"%s\" in class file %s", bytes,
4930 _class_name->as_C_string()
4931 );
4932 return;
4933 }
4934 }
4935
4936 // Checks if name is a legal field name.
4937 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4938 if (!_need_verify || _relax_verify) { return; }
4939
4940 char buf[fixed_buffer_size];
4941 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4942 unsigned int length = name->utf8_length();
4943 bool legal = false;
4944
4945 if (length > 0) {
4946 if (_major_version < JAVA_1_5_VERSION) {
4947 if (bytes[0] != '<') {
4948 const char* p = skip_over_field_name(bytes, false, length);
4949 legal = (p != NULL) && ((p - bytes) == (int)length);
4950 }
4951 } else {
4952 // 4881221: relax the constraints based on JSR202 spec
4953 legal = verify_unqualified_name(bytes, length, LegalField);
4954 }
4955 }
4956
4957 if (!legal) {
4958 ResourceMark rm(THREAD);
4959 assert(_class_name != NULL, "invariant");
4960 Exceptions::fthrow(
4961 THREAD_AND_LOCATION,
4962 vmSymbols::java_lang_ClassFormatError(),
4963 "Illegal field name \"%s\" in class %s", bytes,
4964 _class_name->as_C_string()
4965 );
4966 return;
4967 }
4968 }
4969
4970 // Checks if name is a legal method name.
4971 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4972 if (!_need_verify || _relax_verify) { return; }
4973
4974 assert(name != NULL, "method name is null");
4975 char buf[fixed_buffer_size];
4976 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4977 unsigned int length = name->utf8_length();
4978 bool legal = false;
4979
4980 if (length > 0) {
4981 if (bytes[0] == '<') {
4982 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4983 legal = true;
4984 }
4985 } else if (_major_version < JAVA_1_5_VERSION) {
4986 const char* p;
4987 p = skip_over_field_name(bytes, false, length);
4988 legal = (p != NULL) && ((p - bytes) == (int)length);
4989 } else {
4990 // 4881221: relax the constraints based on JSR202 spec
4991 legal = verify_unqualified_name(bytes, length, LegalMethod);
4992 }
4993 }
4994
4995 if (!legal) {
4996 ResourceMark rm(THREAD);
4997 assert(_class_name != NULL, "invariant");
4998 Exceptions::fthrow(
4999 THREAD_AND_LOCATION,
5000 vmSymbols::java_lang_ClassFormatError(),
5001 "Illegal method name \"%s\" in class %s", bytes,
5002 _class_name->as_C_string()
5003 );
5004 return;
5005 }
5006 }
5007
5008
5009 // Checks if signature is a legal field signature.
5010 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5011 const Symbol* signature,
5012 TRAPS) const {
5013 if (!_need_verify) { return; }
5014
5015 char buf[fixed_buffer_size];
5016 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5017 const unsigned int length = signature->utf8_length();
5018 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5019
5020 if (p == NULL || (p - bytes) != (int)length) {
5021 throwIllegalSignature("Field", name, signature, CHECK);
5022 }
5023 }
5024
5025 // Checks if signature is a legal method signature.
5026 // Returns number of parameters
5027 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5028 const Symbol* signature,
5029 TRAPS) const {
5030 if (!_need_verify) {
5031 // make sure caller's args_size will be less than 0 even for non-static
5032 // method so it will be recomputed in compute_size_of_parameters().
5033 return -2;
5034 }
5035
5036 // Class initializers cannot have args for class format version >= 51.
5037 if (name == vmSymbols::class_initializer_name() &&
5038 signature != vmSymbols::void_method_signature() &&
5039 _major_version >= JAVA_7_VERSION) {
5040 throwIllegalSignature("Method", name, signature, CHECK_0);
5041 return 0;
5042 }
5043
5044 unsigned int args_size = 0;
5045 char buf[fixed_buffer_size];
5046 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5047 unsigned int length = signature->utf8_length();
5048 const char* nextp;
5049
5050 // The first character must be a '('
5051 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5052 length--;
5053 // Skip over legal field signatures
5054 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5055 while ((length > 0) && (nextp != NULL)) {
5056 args_size++;
5057 if (p[0] == 'J' || p[0] == 'D') {
5058 args_size++;
5059 }
5060 length -= nextp - p;
5061 p = nextp;
5062 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5063 }
5064 // The first non-signature thing better be a ')'
5065 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5066 length--;
5067 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5068 // All internal methods must return void
5069 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5070 return args_size;
5071 }
5072 } else {
5073 // Now we better just have a return value
5074 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5075 if (nextp && ((int)length == (nextp - p))) {
5076 return args_size;
5077 }
5078 }
5079 }
5080 }
5081 // Report error
5082 throwIllegalSignature("Method", name, signature, CHECK_0);
5083 return 0;
5084 }
5085
5086 int ClassFileParser::static_field_size() const {
5087 assert(_field_info != NULL, "invariant");
5088 return _field_info->static_field_size;
5089 }
5090
5091 int ClassFileParser::total_oop_map_count() const {
5092 assert(_field_info != NULL, "invariant");
5093 return _field_info->total_oop_map_count;
5094 }
5095
5096 jint ClassFileParser::layout_size() const {
5097 assert(_field_info != NULL, "invariant");
5098 return _field_info->instance_size;
5099 }
5100
5101 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5102 const Array<Method*>* methods) {
5103 assert(ik != NULL, "invariant");
5104 assert(methods != NULL, "invariant");
5105
5106 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5107 // (We used to do this lazily, but now we query it in Rewriter,
5108 // which is eagerly done for every method, so we might as well do it now,
5109 // when everything is fresh in memory.)
5110 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5111
5112 if (klass_id != vmSymbols::NO_SID) {
5113 for (int j = 0; j < methods->length(); ++j) {
5114 Method* method = methods->at(j);
5115 method->init_intrinsic_id();
5116
5117 if (CheckIntrinsics) {
5118 // Check if an intrinsic is defined for method 'method',
5119 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5120 if (method->intrinsic_id() != vmIntrinsics::_none &&
5121 !method->intrinsic_candidate()) {
5122 tty->print("Compiler intrinsic is defined for method [%s], "
5123 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5124 method->name_and_sig_as_C_string(),
5125 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5126 );
5127 tty->cr();
5128 DEBUG_ONLY(vm_exit(1));
5129 }
5130 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5131 // but there is no intrinsic available for it.
5132 if (method->intrinsic_candidate() &&
5133 method->intrinsic_id() == vmIntrinsics::_none) {
5134 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5135 "but no compiler intrinsic is defined for the method.%s",
5136 method->name_and_sig_as_C_string(),
5137 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5138 );
5139 tty->cr();
5140 DEBUG_ONLY(vm_exit(1));
5141 }
5142 }
5143 } // end for
5144
5145 #ifdef ASSERT
5146 if (CheckIntrinsics) {
5147 // Check for orphan methods in the current class. A method m
5148 // of a class C is orphan if an intrinsic is defined for method m,
5149 // but class C does not declare m.
5150 // The check is potentially expensive, therefore it is available
5151 // only in debug builds.
5152
5153 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5154 if (vmIntrinsics::_compiledLambdaForm == id) {
5155 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5156 // generated for the JVM from a LambdaForm and therefore no method
5157 // is defined for it.
5158 continue;
5159 }
5160
5161 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5162 // Check if the current class contains a method with the same
5163 // name, flags, signature.
5164 bool match = false;
5165 for (int j = 0; j < methods->length(); ++j) {
5166 const Method* method = methods->at(j);
5167 if (method->intrinsic_id() == id) {
5168 match = true;
5169 break;
5170 }
5171 }
5172
5173 if (!match) {
5174 char buf[1000];
5175 tty->print("Compiler intrinsic is defined for method [%s], "
5176 "but the method is not available in class [%s].%s",
5177 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5178 buf, sizeof(buf)),
5179 ik->name()->as_C_string(),
5180 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5181 );
5182 tty->cr();
5183 DEBUG_ONLY(vm_exit(1));
5184 }
5185 }
5186 } // end for
5187 } // CheckIntrinsics
5188 #endif // ASSERT
5189 }
5190 }
5191
5192 InstanceKlass* ClassFileParser::create_instance_klass(TRAPS) {
5193 if (_klass != NULL) {
5194 return _klass;
5195 }
5196
5197 InstanceKlass* const ik =
5198 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5199
5200 fill_instance_klass(ik, CHECK_NULL);
5201
5202 assert(_klass == ik, "invariant");
5203
5204 return ik;
5205 }
5206
5207 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, TRAPS) {
5208 assert(ik != NULL, "invariant");
5209
5210 set_klass_to_deallocate(ik);
5211
5212 assert(_field_info != NULL, "invariant");
5213 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5214 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5215 "sanity");
5216
5217 assert(ik->is_instance_klass(), "sanity");
5218 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5219
5220 // Fill in information already parsed
5221 ik->set_should_verify_class(_need_verify);
5222
5223 // Not yet: supers are done below to support the new subtype-checking fields
5224 ik->set_class_loader_data(_loader_data);
5225 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5226 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5227 assert(_fac != NULL, "invariant");
5228 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5229
5230 // this transfers ownership of a lot of arrays from
5231 // the parser onto the InstanceKlass*
5232 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5233
5234 // note that is not safe to use the fields in the parser from this point on
5235 assert(NULL == _cp, "invariant");
5236 assert(NULL == _fields, "invariant");
5237 assert(NULL == _methods, "invariant");
5238 assert(NULL == _inner_classes, "invariant");
5239 assert(NULL == _local_interfaces, "invariant");
5240 assert(NULL == _transitive_interfaces, "invariant");
5241 assert(NULL == _combined_annotations, "invariant");
5242
5243 if (_has_final_method) {
5244 ik->set_has_final_method();
5245 }
5246
5247 ik->copy_method_ordering(_method_ordering, CHECK);
5248 // The InstanceKlass::_methods_jmethod_ids cache
5249 // is managed on the assumption that the initial cache
5250 // size is equal to the number of methods in the class. If
5251 // that changes, then InstanceKlass::idnum_can_increment()
5252 // has to be changed accordingly.
5253 ik->set_initial_method_idnum(ik->methods()->length());
5254
5255 ik->set_name(_class_name);
5256
5257 if (is_anonymous()) {
5258 // I am well known to myself
5259 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5260 }
5261
5262 ik->set_minor_version(_minor_version);
5263 ik->set_major_version(_major_version);
5264 ik->set_has_default_methods(_has_default_methods);
5265 ik->set_declares_default_methods(_declares_default_methods);
5266
5267 if (_host_klass != NULL) {
5268 assert (ik->is_anonymous(), "should be the same");
5269 ik->set_host_klass(_host_klass);
5270 }
5271
5272 const Array<Method*>* const methods = ik->methods();
5273 assert(methods != NULL, "invariant");
5274 const int methods_len = methods->length();
5275
5276 check_methods_for_intrinsics(ik, methods);
5277
5278 // Fill in field values obtained by parse_classfile_attributes
5279 if (_parsed_annotations->has_any_annotations()) {
5280 _parsed_annotations->apply_to(ik);
5281 }
5282
5283 apply_parsed_class_attributes(ik);
5284
5285 // Miranda methods
5286 if ((_num_miranda_methods > 0) ||
5287 // if this class introduced new miranda methods or
5288 (_super_klass != NULL && _super_klass->has_miranda_methods())
5289 // super class exists and this class inherited miranda methods
5290 ) {
5291 ik->set_has_miranda_methods(); // then set a flag
5292 }
5293
5294 // Fill in information needed to compute superclasses.
5295 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5296
5297 // Initialize itable offset tables
5298 klassItable::setup_itable_offset_table(ik);
5299
5300 // Compute transitive closure of interfaces this class implements
5301 // Do final class setup
5302 fill_oop_maps(ik,
5303 _field_info->nonstatic_oop_map_count,
5304 _field_info->nonstatic_oop_offsets,
5305 _field_info->nonstatic_oop_counts);
5306
5307 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5308 set_precomputed_flags(ik);
5309
5310 // check if this class can access its super class
5311 check_super_class_access(ik, CHECK);
5312
5313 // check if this class can access its superinterfaces
5314 check_super_interface_access(ik, CHECK);
5315
5316 // check if this class overrides any final method
5317 check_final_method_override(ik, CHECK);
5318
5319 // check that if this class is an interface then it doesn't have static methods
5320 if (ik->is_interface()) {
5321 /* An interface in a JAVA 8 classfile can be static */
5322 if (_major_version < JAVA_8_VERSION) {
5323 check_illegal_static_method(ik, CHECK);
5324 }
5325 }
5326
5327 // Allocate mirror and initialize static fields
5328 // The create_mirror() call will also call compute_modifiers()
5329 java_lang_Class::create_mirror(ik,
5330 _loader_data->class_loader(),
5331 _protection_domain,
5332 CHECK);
5333
5334 assert(_all_mirandas != NULL, "invariant");
5335
5336 // Generate any default methods - default methods are interface methods
5337 // that have a default implementation. This is new with Lambda project.
5338 if (_has_default_methods ) {
5339 DefaultMethods::generate_default_methods(ik,
5340 _all_mirandas,
5341 CHECK);
5342 }
5343
5344 // Update the loader_data graph.
5345 record_defined_class_dependencies(ik, CHECK);
5346
5347 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5348
5349 if (!is_internal()) {
5350 if (TraceClassLoading) {
5351 ResourceMark rm;
5352 // print in a single call to reduce interleaving of output
5353 if (_stream->source() != NULL) {
5354 tty->print("[Loaded %s from %s]\n",
5355 ik->external_name(),
5356 _stream->source());
5357 } else if (_loader_data->class_loader() == NULL) {
5358 const Klass* const caller =
5359 THREAD->is_Java_thread()
5360 ? ((JavaThread*)THREAD)->security_get_caller_class(1)
5361 : NULL;
5362 // caller can be NULL, for example, during a JVMTI VM_Init hook
5363 if (caller != NULL) {
5364 tty->print("[Loaded %s by instance of %s]\n",
5365 ik->external_name(),
5366 caller->external_name());
5367 } else {
5368 tty->print("[Loaded %s]\n", ik->external_name());
5369 }
5370 } else {
5371 tty->print("[Loaded %s from %s]\n", ik->external_name(),
5372 _loader_data->class_loader()->klass()->external_name());
5373 }
5374 }
5375
5376 if (log_is_enabled(Info, classresolve)) {
5377 ResourceMark rm;
5378 // print out the superclass.
5379 const char * from = ik->external_name();
5380 if (ik->java_super() != NULL) {
5381 log_info(classresolve)("%s %s (super)",
5382 from,
5383 ik->java_super()->external_name());
5384 }
5385 // print out each of the interface classes referred to by this class.
5386 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5387 if (local_interfaces != NULL) {
5388 const int length = local_interfaces->length();
5389 for (int i = 0; i < length; i++) {
5390 const Klass* const k = local_interfaces->at(i);
5391 const char * to = k->external_name();
5392 log_info(classresolve)("%s %s (interface)", from, to);
5393 }
5394 }
5395 }
5396 }
5397
5398 TRACE_INIT_ID(ik);
5399
5400 // If we reach here, all is well.
5401 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5402 // in order for it to not be destroyed in the ClassFileParser destructor.
5403 set_klass_to_deallocate(NULL);
5404
5405 // it's official
5406 set_klass(ik);
5407
5408 debug_only(ik->verify();)
5409 }
5410
5411 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5412 Symbol* name,
5413 ClassLoaderData* loader_data,
5414 Handle protection_domain,
5415 TempNewSymbol* parsed_name,
5416 const Klass* host_klass,
5417 GrowableArray<Handle>* cp_patches,
5418 Publicity pub_level,
5419 TRAPS) :
5420 _stream(stream),
5421 _requested_name(name),
5422 _loader_data(loader_data),
5423 _host_klass(host_klass),
5424 _cp_patches(cp_patches),
5425 _parsed_name(parsed_name),
5426 _super_klass(),
5427 _cp(NULL),
5428 _fields(NULL),
5429 _methods(NULL),
5430 _inner_classes(NULL),
5431 _local_interfaces(NULL),
5432 _transitive_interfaces(NULL),
5433 _combined_annotations(NULL),
5434 _annotations(NULL),
5435 _type_annotations(NULL),
5436 _fields_annotations(NULL),
5437 _fields_type_annotations(NULL),
5438 _klass(NULL),
5439 _klass_to_deallocate(NULL),
5440 _parsed_annotations(NULL),
5441 _fac(NULL),
5442 _field_info(NULL),
5443 _method_ordering(NULL),
5444 _all_mirandas(NULL),
5445 _vtable_size(0),
5446 _itable_size(0),
5447 _num_miranda_methods(0),
5448 _rt(REF_NONE),
5449 _protection_domain(protection_domain),
5450 _access_flags(),
5451 _pub_level(pub_level),
5452 _synthetic_flag(false),
5453 _sde_length(false),
5454 _sde_buffer(NULL),
5455 _sourcefile_index(0),
5456 _generic_signature_index(0),
5457 _major_version(0),
5458 _minor_version(0),
5459 _this_class_index(0),
5460 _super_class_index(0),
5461 _itfs_len(0),
5462 _java_fields_count(0),
5463 _need_verify(false),
5464 _relax_verify(false),
5465 _has_default_methods(false),
5466 _declares_default_methods(false),
5467 _has_final_method(false),
5468 _has_finalizer(false),
5469 _has_empty_finalizer(false),
5470 _has_vanilla_constructor(false),
5471 _max_bootstrap_specifier_index(-1) {
5472
5473 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5474
5475 assert(THREAD->is_Java_thread(), "invariant");
5476 assert(_loader_data != NULL, "invariant");
5477 assert(stream != NULL, "invariant");
5478 assert(_stream != NULL, "invariant");
5479 assert(_stream->buffer() == _stream->current(), "invariant");
5480 assert(_class_name != NULL, "invariant");
5481 assert(0 == _access_flags.as_int(), "invariant");
5482
5483 // Figure out whether we can skip format checking (matching classic VM behavior)
5484 if (DumpSharedSpaces) {
5485 // verify == true means it's a 'remote' class (i.e., non-boot class)
5486 // Verification decision is based on BytecodeVerificationRemote flag
5487 // for those classes.
5488 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5489 BytecodeVerificationLocal;
5490 }
5491 else {
5492 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5493 stream->need_verify());
5494 }
5495
5496 // synch back verification state to stream
5497 stream->set_verify(_need_verify);
5498
5499 // Check if verification needs to be relaxed for this class file
5500 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5501 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader());
5502
5503 parse_stream(stream, CHECK);
5504
5505 post_process_parsed_stream(stream, _cp, CHECK);
5506 }
5507
5508 void ClassFileParser::clear_class_metadata() {
5509 // metadata created before the instance klass is created. Must be
5510 // deallocated if classfile parsing returns an error.
5511 _cp = NULL;
5512 _fields = NULL;
5513 _methods = NULL;
5514 _inner_classes = NULL;
5515 _local_interfaces = NULL;
5516 _transitive_interfaces = NULL;
5517 _combined_annotations = NULL;
5518 _annotations = _type_annotations = NULL;
5519 _fields_annotations = _fields_type_annotations = NULL;
5520 }
5521
5522 // Destructor to clean up
5523 ClassFileParser::~ClassFileParser() {
5524 if (_cp != NULL) {
5525 MetadataFactory::free_metadata(_loader_data, _cp);
5526 }
5527 if (_fields != NULL) {
5528 MetadataFactory::free_array<u2>(_loader_data, _fields);
5529 }
5530
5531 if (_methods != NULL) {
5532 // Free methods
5533 InstanceKlass::deallocate_methods(_loader_data, _methods);
5534 }
5535
5536 // beware of the Universe::empty_blah_array!!
5537 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5538 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5539 }
5540
5541 // Free interfaces
5542 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5543 _local_interfaces, _transitive_interfaces);
5544
5545 if (_combined_annotations != NULL) {
5546 // After all annotations arrays have been created, they are installed into the
5547 // Annotations object that will be assigned to the InstanceKlass being created.
5548
5549 // Deallocate the Annotations object and the installed annotations arrays.
5550 _combined_annotations->deallocate_contents(_loader_data);
5551
5552 // If the _combined_annotations pointer is non-NULL,
5553 // then the other annotations fields should have been cleared.
5554 assert(_annotations == NULL, "Should have been cleared");
5555 assert(_type_annotations == NULL, "Should have been cleared");
5556 assert(_fields_annotations == NULL, "Should have been cleared");
5557 assert(_fields_type_annotations == NULL, "Should have been cleared");
5558 } else {
5559 // If the annotations arrays were not installed into the Annotations object,
5560 // then they have to be deallocated explicitly.
5561 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5562 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5563 Annotations::free_contents(_loader_data, _fields_annotations);
5564 Annotations::free_contents(_loader_data, _fields_type_annotations);
5565 }
5566
5567 clear_class_metadata();
5568
5569 // deallocate the klass if already created. Don't directly deallocate, but add
5570 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5571 // at a safepoint.
5572 if (_klass_to_deallocate != NULL) {
5573 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5574 }
5575 }
5576
5577 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5578 TRAPS) {
5579
5580 assert(stream != NULL, "invariant");
5581 assert(_class_name != NULL, "invariant");
5582
5583 // BEGIN STREAM PARSING
5584 stream->guarantee_more(8, CHECK); // magic, major, minor
5585 // Magic value
5586 const u4 magic = stream->get_u4_fast();
5587 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5588 "Incompatible magic value %u in class file %s",
5589 magic, CHECK);
5590
5591 // Version numbers
5592 _minor_version = stream->get_u2_fast();
5593 _major_version = stream->get_u2_fast();
5594
5595 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5596 ResourceMark rm;
5597 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5598 _major_version, _minor_version, _class_name->as_C_string());
5599 Exceptions::fthrow(
5600 THREAD_AND_LOCATION,
5601 vmSymbols::java_lang_UnsupportedClassVersionError(),
5602 "Unsupported major.minor version for dump time %u.%u",
5603 _major_version,
5604 _minor_version);
5605 }
5606
5607 // Check version numbers - we check this even with verifier off
5608 if (!is_supported_version(_major_version, _minor_version)) {
5609 ResourceMark rm(THREAD);
5610 Exceptions::fthrow(
5611 THREAD_AND_LOCATION,
5612 vmSymbols::java_lang_UnsupportedClassVersionError(),
5613 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5614 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5615 _class_name->as_C_string(),
5616 _major_version,
5617 _minor_version,
5618 JAVA_MAX_SUPPORTED_VERSION,
5619 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5620 return;
5621 }
5622
5623 stream->guarantee_more(3, CHECK); // length, first cp tag
5624 const u2 cp_size = stream->get_u2_fast();
5625
5626 guarantee_property(
5627 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5628 cp_size, CHECK);
5629
5630 _cp = ConstantPool::allocate(_loader_data,
5631 cp_size,
5632 CHECK);
5633
5634 ConstantPool* const cp = _cp;
5635
5636 parse_constant_pool(stream, cp, cp_size, CHECK);
5637
5638 assert(cp_size == (const u2)cp->length(), "invariant");
5639
5640 // ACCESS FLAGS
5641 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5642
5643 // Access flags
5644 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5645
5646 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5647 // Set abstract bit for old class files for backward compatibility
5648 flags |= JVM_ACC_ABSTRACT;
5649 }
5650
5651 _access_flags.set_flags(flags);
5652
5653 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5654
5655 // This class and superclass
5656 _this_class_index = stream->get_u2_fast();
5657 check_property(
5658 valid_cp_range(_this_class_index, cp_size) &&
5659 cp->tag_at(_this_class_index).is_unresolved_klass(),
5660 "Invalid this class index %u in constant pool in class file %s",
5661 _this_class_index, CHECK);
5662
5663 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5664 assert(class_name_in_cp != NULL, "class_name can't be null");
5665
5666 if (_parsed_name != NULL) {
5667 // It's important to set parsed_name *before* resolving the super class.
5668 // (it's used for cleanup by the caller if parsing fails)
5669 *_parsed_name = class_name_in_cp;
5670 // parsed_name is returned and can be used if there's an error, so add to
5671 // its reference count. Caller will decrement the refcount.
5672 (*_parsed_name)->increment_refcount();
5673 }
5674
5675 // Update _class_name which could be null previously
5676 // to reflect the name in the constant pool
5677 _class_name = class_name_in_cp;
5678
5679 // Don't need to check whether this class name is legal or not.
5680 // It has been checked when constant pool is parsed.
5681 // However, make sure it is not an array type.
5682 if (_need_verify) {
5683 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5684 "Bad class name in class file %s",
5685 CHECK);
5686 }
5687
5688 // Checks if name in class file matches requested name
5689 if (_requested_name != NULL && _requested_name != _class_name) {
5690 ResourceMark rm(THREAD);
5691 Exceptions::fthrow(
5692 THREAD_AND_LOCATION,
5693 vmSymbols::java_lang_NoClassDefFoundError(),
5694 "%s (wrong name: %s)",
5695 _class_name->as_C_string(),
5696 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5697 );
5698 return;
5699 }
5700
5701 if (!is_internal()) {
5702 if (TraceClassLoadingPreorder) {
5703 tty->print("[Loading %s",
5704 _class_name->as_klass_external_name());
5705
5706 if (stream->source() != NULL) {
5707 tty->print(" from %s", stream->source());
5708 }
5709 tty->print_cr("]");
5710 }
5711 #if INCLUDE_CDS
5712 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5713 // Only dump the classes that can be stored into CDS archive
5714 if (SystemDictionaryShared::is_sharing_possible(_loader_data)) {
5715 ResourceMark rm(THREAD);
5716 classlist_file->print_cr("%s", _class_name->as_C_string());
5717 classlist_file->flush();
5718 }
5719 }
5720 #endif
5721 }
5722
5723 // SUPERKLASS
5724 _super_class_index = stream->get_u2_fast();
5725 _super_klass = parse_super_class(cp,
5726 _super_class_index,
5727 _need_verify,
5728 CHECK);
5729
5730 // Interfaces
5731 _itfs_len = stream->get_u2_fast();
5732 parse_interfaces(stream,
5733 _itfs_len,
5734 cp,
5735 &_has_default_methods,
5736 CHECK);
5737
5738 assert(_local_interfaces != NULL, "invariant");
5739
5740 // Fields (offsets are filled in later)
5741 _fac = new FieldAllocationCount();
5742 parse_fields(stream,
5743 _access_flags.is_interface(),
5744 _fac,
5745 cp,
5746 cp_size,
5747 &_java_fields_count,
5748 CHECK);
5749
5750 assert(_fields != NULL, "invariant");
5751
5752 // Methods
5753 AccessFlags promoted_flags;
5754 parse_methods(stream,
5755 _access_flags.is_interface(),
5756 &promoted_flags,
5757 &_has_final_method,
5758 &_declares_default_methods,
5759 CHECK);
5760
5761 assert(_methods != NULL, "invariant");
5762
5763 // promote flags from parse_methods() to the klass' flags
5764 _access_flags.add_promoted_flags(promoted_flags.as_int());
5765
5766 if (_declares_default_methods) {
5767 _has_default_methods = true;
5768 }
5769
5770 // Additional attributes/annotations
5771 _parsed_annotations = new ClassAnnotationCollector();
5772 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5773
5774 assert(_inner_classes != NULL, "invariant");
5775
5776 // Finalize the Annotations metadata object,
5777 // now that all annotation arrays have been created.
5778 create_combined_annotations(CHECK);
5779
5780 // Make sure this is the end of class file stream
5781 guarantee_property(stream->at_eos(),
5782 "Extra bytes at the end of class file %s",
5783 CHECK);
5784
5785 // all bytes in stream read and parsed
5786 }
5787
5788 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5789 ConstantPool* cp,
5790 TRAPS) {
5791 assert(stream != NULL, "invariant");
5792 assert(stream->at_eos(), "invariant");
5793 assert(cp != NULL, "invariant");
5794 assert(_loader_data != NULL, "invariant");
5795
5796 // We check super class after class file is parsed and format is checked
5797 if (_super_class_index > 0 && NULL ==_super_klass) {
5798 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5799 if (_access_flags.is_interface()) {
5800 // Before attempting to resolve the superclass, check for class format
5801 // errors not checked yet.
5802 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5803 "Interfaces must have java.lang.Object as superclass in class file %s",
5804 CHECK);
5805 }
5806 _super_klass = (const InstanceKlass*)
5807 SystemDictionary::resolve_super_or_fail(_class_name,
5808 super_class_name,
5809 _loader_data->class_loader(),
5810 _protection_domain,
5811 true,
5812 CHECK);
5813 }
5814
5815 if (_super_klass != NULL) {
5816 if (_super_klass->has_default_methods()) {
5817 _has_default_methods = true;
5818 }
5819
5820 if (_super_klass->is_interface()) {
5821 ResourceMark rm(THREAD);
5822 Exceptions::fthrow(
5823 THREAD_AND_LOCATION,
5824 vmSymbols::java_lang_IncompatibleClassChangeError(),
5825 "class %s has interface %s as super class",
5826 _class_name->as_klass_external_name(),
5827 _super_klass->external_name()
5828 );
5829 return;
5830 }
5831 // Make sure super class is not final
5832 if (_super_klass->is_final()) {
5833 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5834 }
5835 }
5836
5837 // Compute the transitive list of all unique interfaces implemented by this class
5838 _transitive_interfaces =
5839 compute_transitive_interfaces(_super_klass,
5840 _local_interfaces,
5841 _loader_data,
5842 CHECK);
5843
5844 assert(_transitive_interfaces != NULL, "invariant");
5845
5846 // sort methods
5847 _method_ordering = sort_methods(_methods);
5848
5849 _all_mirandas = new GrowableArray<Method*>(20);
5850
5851 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5852 &_num_miranda_methods,
5853 _all_mirandas,
5854 _super_klass,
5855 _methods,
5856 _access_flags,
5857 _loader_data->class_loader(),
5858 _class_name,
5859 _local_interfaces,
5860 CHECK);
5861
5862 // Size of Java itable (in words)
5863 _itable_size = _access_flags.is_interface() ? 0 :
5864 klassItable::compute_itable_size(_transitive_interfaces);
5865
5866 assert(_fac != NULL, "invariant");
5867 assert(_parsed_annotations != NULL, "invariant");
5868
5869 _field_info = new FieldLayoutInfo();
5870 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5871
5872 // Compute reference typ
5873 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5874
5875 }
5876
5877 void ClassFileParser::set_klass(InstanceKlass* klass) {
5878
5879 #ifdef ASSERT
5880 if (klass != NULL) {
5881 assert(NULL == _klass, "leaking?");
5882 }
5883 #endif
5884
5885 _klass = klass;
5886 }
5887
5888 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5889
5890 #ifdef ASSERT
5891 if (klass != NULL) {
5892 assert(NULL == _klass_to_deallocate, "leaking?");
5893 }
5894 #endif
5895
5896 _klass_to_deallocate = klass;
5897 }
5898
5899 // Caller responsible for ResourceMark
5900 // clone stream with rewound position
5901 const ClassFileStream* ClassFileParser::clone_stream() const {
5902 assert(_stream != NULL, "invariant");
5903
5904 return _stream->clone();
5905 }
--- EOF ---