1 /*
2 * Copyright (c) 1997, 2018, 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 "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "logging/log.hpp"
41 #include "logging/logStream.hpp"
42 #include "memory/allocation.hpp"
43 #include "memory/metadataFactory.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/annotations.hpp"
48 #include "oops/constantPool.inline.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/instanceMirrorKlass.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/klassVtable.hpp"
54 #include "oops/metadata.hpp"
55 #include "oops/method.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "runtime/arguments.hpp"
61 #include "runtime/handles.inline.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/perfData.hpp"
64 #include "runtime/reflection.hpp"
65 #include "runtime/safepointVerifiers.hpp"
66 #include "runtime/signature.hpp"
67 #include "runtime/timer.hpp"
68 #include "services/classLoadingService.hpp"
69 #include "services/threadService.hpp"
70 #include "utilities/align.hpp"
71 #include "utilities/bitMap.inline.hpp"
72 #include "utilities/copy.hpp"
73 #include "utilities/exceptions.hpp"
74 #include "utilities/globalDefinitions.hpp"
75 #include "utilities/growableArray.hpp"
76 #include "utilities/macros.hpp"
77 #include "utilities/ostream.hpp"
78 #include "utilities/resourceHash.hpp"
79 #if INCLUDE_CDS
80 #include "classfile/systemDictionaryShared.hpp"
81 #endif
82 #if INCLUDE_JFR
83 #include "jfr/support/jfrTraceIdExtension.hpp"
84 #endif
85
86 // We generally try to create the oops directly when parsing, rather than
87 // allocating temporary data structures and copying the bytes twice. A
88 // temporary area is only needed when parsing utf8 entries in the constant
89 // pool and when parsing line number tables.
90
91 // We add assert in debug mode when class format is not checked.
92
93 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
94 #define JAVA_MIN_SUPPORTED_VERSION 45
95 #define JAVA_PREVIEW_MINOR_VERSION 65535
96
97 // Used for two backward compatibility reasons:
98 // - to check for new additions to the class file format in JDK1.5
99 // - to check for bug fixes in the format checker in JDK1.5
100 #define JAVA_1_5_VERSION 49
101
102 // Used for backward compatibility reasons:
103 // - to check for javac bug fixes that happened after 1.5
104 // - also used as the max version when running in jdk6
105 #define JAVA_6_VERSION 50
106
107 // Used for backward compatibility reasons:
108 // - to disallow argument and require ACC_STATIC for <clinit> methods
109 #define JAVA_7_VERSION 51
110
111 // Extension method support.
112 #define JAVA_8_VERSION 52
113
114 #define JAVA_9_VERSION 53
115
116 #define JAVA_10_VERSION 54
117
118 #define JAVA_11_VERSION 55
119
120 #define JAVA_12_VERSION 56
121
122 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
123 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
124 "Unexpected bad constant pool entry");
125 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
126 }
127
128 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
129 ConstantPool* cp,
130 const int length,
131 TRAPS) {
132 assert(stream != NULL, "invariant");
133 assert(cp != NULL, "invariant");
134
135 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
136 // this function (_current can be allocated in a register, with scalar
137 // replacement of aggregates). The _current pointer is copied back to
138 // stream() when this function returns. DON'T call another method within
139 // this method that uses stream().
140 const ClassFileStream cfs1 = *stream;
141 const ClassFileStream* const cfs = &cfs1;
142
143 assert(cfs->allocated_on_stack(), "should be local");
144 debug_only(const u1* const old_current = stream->current();)
145
146 // Used for batching symbol allocations.
147 const char* names[SymbolTable::symbol_alloc_batch_size];
148 int lengths[SymbolTable::symbol_alloc_batch_size];
149 int indices[SymbolTable::symbol_alloc_batch_size];
150 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
151 int names_count = 0;
152
153 // parsing Index 0 is unused
154 for (int index = 1; index < length; index++) {
155 // Each of the following case guarantees one more byte in the stream
156 // for the following tag or the access_flags following constant pool,
157 // so we don't need bounds-check for reading tag.
158 const u1 tag = cfs->get_u1_fast();
159 switch (tag) {
160 case JVM_CONSTANT_Class : {
161 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
162 const u2 name_index = cfs->get_u2_fast();
163 cp->klass_index_at_put(index, name_index);
164 break;
165 }
166 case JVM_CONSTANT_Fieldref: {
167 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
168 const u2 class_index = cfs->get_u2_fast();
169 const u2 name_and_type_index = cfs->get_u2_fast();
170 cp->field_at_put(index, class_index, name_and_type_index);
171 break;
172 }
173 case JVM_CONSTANT_Methodref: {
174 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
175 const u2 class_index = cfs->get_u2_fast();
176 const u2 name_and_type_index = cfs->get_u2_fast();
177 cp->method_at_put(index, class_index, name_and_type_index);
178 break;
179 }
180 case JVM_CONSTANT_InterfaceMethodref: {
181 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
182 const u2 class_index = cfs->get_u2_fast();
183 const u2 name_and_type_index = cfs->get_u2_fast();
184 cp->interface_method_at_put(index, class_index, name_and_type_index);
185 break;
186 }
187 case JVM_CONSTANT_String : {
188 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
189 const u2 string_index = cfs->get_u2_fast();
190 cp->string_index_at_put(index, string_index);
191 break;
192 }
193 case JVM_CONSTANT_MethodHandle :
194 case JVM_CONSTANT_MethodType: {
195 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
196 classfile_parse_error(
197 "Class file version does not support constant tag %u in class file %s",
198 tag, CHECK);
199 }
200 if (tag == JVM_CONSTANT_MethodHandle) {
201 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
202 const u1 ref_kind = cfs->get_u1_fast();
203 const u2 method_index = cfs->get_u2_fast();
204 cp->method_handle_index_at_put(index, ref_kind, method_index);
205 }
206 else if (tag == JVM_CONSTANT_MethodType) {
207 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
208 const u2 signature_index = cfs->get_u2_fast();
209 cp->method_type_index_at_put(index, signature_index);
210 }
211 else {
212 ShouldNotReachHere();
213 }
214 break;
215 }
216 case JVM_CONSTANT_Dynamic : {
217 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
218 classfile_parse_error(
219 "Class file version does not support constant tag %u in class file %s",
220 tag, CHECK);
221 }
222 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
223 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
224 const u2 name_and_type_index = cfs->get_u2_fast();
225 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
226 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
227 }
228 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
229 break;
230 }
231 case JVM_CONSTANT_InvokeDynamic : {
232 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
233 classfile_parse_error(
234 "Class file version does not support constant tag %u in class file %s",
235 tag, CHECK);
236 }
237 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
238 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
239 const u2 name_and_type_index = cfs->get_u2_fast();
240 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
241 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
242 }
243 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
244 break;
245 }
246 case JVM_CONSTANT_Integer: {
247 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
248 const u4 bytes = cfs->get_u4_fast();
249 cp->int_at_put(index, (jint)bytes);
250 break;
251 }
252 case JVM_CONSTANT_Float: {
253 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
254 const u4 bytes = cfs->get_u4_fast();
255 cp->float_at_put(index, *(jfloat*)&bytes);
256 break;
257 }
258 case JVM_CONSTANT_Long: {
259 // A mangled type might cause you to overrun allocated memory
260 guarantee_property(index + 1 < length,
261 "Invalid constant pool entry %u in class file %s",
262 index,
263 CHECK);
264 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
265 const u8 bytes = cfs->get_u8_fast();
266 cp->long_at_put(index, bytes);
267 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
268 break;
269 }
270 case JVM_CONSTANT_Double: {
271 // A mangled type might cause you to overrun allocated memory
272 guarantee_property(index+1 < length,
273 "Invalid constant pool entry %u in class file %s",
274 index,
275 CHECK);
276 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
277 const u8 bytes = cfs->get_u8_fast();
278 cp->double_at_put(index, *(jdouble*)&bytes);
279 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
280 break;
281 }
282 case JVM_CONSTANT_NameAndType: {
283 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
284 const u2 name_index = cfs->get_u2_fast();
285 const u2 signature_index = cfs->get_u2_fast();
286 cp->name_and_type_at_put(index, name_index, signature_index);
287 break;
288 }
289 case JVM_CONSTANT_Utf8 : {
290 cfs->guarantee_more(2, CHECK); // utf8_length
291 u2 utf8_length = cfs->get_u2_fast();
292 const u1* utf8_buffer = cfs->current();
293 assert(utf8_buffer != NULL, "null utf8 buffer");
294 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
295 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
296 cfs->skip_u1_fast(utf8_length);
297
298 // Before storing the symbol, make sure it's legal
299 if (_need_verify) {
300 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
301 }
302
303 if (has_cp_patch_at(index)) {
304 Handle patch = clear_cp_patch_at(index);
305 guarantee_property(java_lang_String::is_instance(patch()),
306 "Illegal utf8 patch at %d in class file %s",
307 index,
308 CHECK);
309 const char* const str = java_lang_String::as_utf8_string(patch());
310 // (could use java_lang_String::as_symbol instead, but might as well batch them)
311 utf8_buffer = (const u1*) str;
312 utf8_length = (int) strlen(str);
313 }
314
315 unsigned int hash;
316 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
317 utf8_length,
318 hash);
319 if (result == NULL) {
320 names[names_count] = (const char*)utf8_buffer;
321 lengths[names_count] = utf8_length;
322 indices[names_count] = index;
323 hashValues[names_count++] = hash;
324 if (names_count == SymbolTable::symbol_alloc_batch_size) {
325 SymbolTable::new_symbols(_loader_data,
326 cp,
327 names_count,
328 names,
329 lengths,
330 indices,
331 hashValues,
332 CHECK);
333 names_count = 0;
334 }
335 } else {
336 cp->symbol_at_put(index, result);
337 }
338 break;
339 }
340 case 19:
341 case 20: {
342 // Record that an error occurred in these two cases but keep parsing so
343 // that ACC_Module can be checked for in the access_flags. Need to
344 // throw NoClassDefFoundError in that case.
345 if (_major_version >= JAVA_9_VERSION) {
346 cfs->guarantee_more(3, CHECK);
347 cfs->get_u2_fast();
348 set_class_bad_constant_seen(tag);
349 break;
350 }
351 }
352 default: {
353 classfile_parse_error("Unknown constant tag %u in class file %s",
354 tag,
355 CHECK);
356 break;
357 }
358 } // end of switch(tag)
359 } // end of for
360
361 // Allocate the remaining symbols
362 if (names_count > 0) {
363 SymbolTable::new_symbols(_loader_data,
364 cp,
365 names_count,
366 names,
367 lengths,
368 indices,
369 hashValues,
370 CHECK);
371 }
372
373 // Copy _current pointer of local copy back to stream.
374 assert(stream->current() == old_current, "non-exclusive use of stream");
375 stream->set_current(cfs1.current());
376
377 }
378
379 static inline bool valid_cp_range(int index, int length) {
380 return (index > 0 && index < length);
381 }
382
383 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
384 assert(cp != NULL, "invariant");
385 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
386 return cp->symbol_at(index);
387 }
388 return NULL;
389 }
390
391 #ifdef ASSERT
392 PRAGMA_DIAG_PUSH
393 PRAGMA_FORMAT_NONLITERAL_IGNORED
394 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
395 ResourceMark rm(THREAD);
396 fatal(msg, _class_name->as_C_string());
397 }
398
399 void ClassFileParser::report_assert_property_failure(const char* msg,
400 int index,
401 TRAPS) const {
402 ResourceMark rm(THREAD);
403 fatal(msg, index, _class_name->as_C_string());
404 }
405 PRAGMA_DIAG_POP
406 #endif
407
408 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
409 ConstantPool* const cp,
410 const int length,
411 TRAPS) {
412 assert(cp != NULL, "invariant");
413 assert(stream != NULL, "invariant");
414
415 // parsing constant pool entries
416 parse_constant_pool_entries(stream, cp, length, CHECK);
417 if (class_bad_constant_seen() != 0) {
418 // a bad CP entry has been detected previously so stop parsing and just return.
419 return;
420 }
421
422 int index = 1; // declared outside of loops for portability
423 int num_klasses = 0;
424
425 // first verification pass - validate cross references
426 // and fixup class and string constants
427 for (index = 1; index < length; index++) { // Index 0 is unused
428 const jbyte tag = cp->tag_at(index).value();
429 switch (tag) {
430 case JVM_CONSTANT_Class: {
431 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
432 break;
433 }
434 case JVM_CONSTANT_Fieldref:
435 // fall through
436 case JVM_CONSTANT_Methodref:
437 // fall through
438 case JVM_CONSTANT_InterfaceMethodref: {
439 if (!_need_verify) break;
440 const int klass_ref_index = cp->klass_ref_index_at(index);
441 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
442 check_property(valid_klass_reference_at(klass_ref_index),
443 "Invalid constant pool index %u in class file %s",
444 klass_ref_index, CHECK);
445 check_property(valid_cp_range(name_and_type_ref_index, length) &&
446 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
447 "Invalid constant pool index %u in class file %s",
448 name_and_type_ref_index, CHECK);
449 break;
450 }
451 case JVM_CONSTANT_String: {
452 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
453 break;
454 }
455 case JVM_CONSTANT_Integer:
456 break;
457 case JVM_CONSTANT_Float:
458 break;
459 case JVM_CONSTANT_Long:
460 case JVM_CONSTANT_Double: {
461 index++;
462 check_property(
463 (index < length && cp->tag_at(index).is_invalid()),
464 "Improper constant pool long/double index %u in class file %s",
465 index, CHECK);
466 break;
467 }
468 case JVM_CONSTANT_NameAndType: {
469 if (!_need_verify) break;
470 const int name_ref_index = cp->name_ref_index_at(index);
471 const int signature_ref_index = cp->signature_ref_index_at(index);
472 check_property(valid_symbol_at(name_ref_index),
473 "Invalid constant pool index %u in class file %s",
474 name_ref_index, CHECK);
475 check_property(valid_symbol_at(signature_ref_index),
476 "Invalid constant pool index %u in class file %s",
477 signature_ref_index, CHECK);
478 break;
479 }
480 case JVM_CONSTANT_Utf8:
481 break;
482 case JVM_CONSTANT_UnresolvedClass: // fall-through
483 case JVM_CONSTANT_UnresolvedClassInError: {
484 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
485 break;
486 }
487 case JVM_CONSTANT_ClassIndex: {
488 const int class_index = cp->klass_index_at(index);
489 check_property(valid_symbol_at(class_index),
490 "Invalid constant pool index %u in class file %s",
491 class_index, CHECK);
492 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
493 break;
494 }
495 case JVM_CONSTANT_StringIndex: {
496 const int string_index = cp->string_index_at(index);
497 check_property(valid_symbol_at(string_index),
498 "Invalid constant pool index %u in class file %s",
499 string_index, CHECK);
500 Symbol* const sym = cp->symbol_at(string_index);
501 cp->unresolved_string_at_put(index, sym);
502 break;
503 }
504 case JVM_CONSTANT_MethodHandle: {
505 const int ref_index = cp->method_handle_index_at(index);
506 check_property(valid_cp_range(ref_index, length),
507 "Invalid constant pool index %u in class file %s",
508 ref_index, CHECK);
509 const constantTag tag = cp->tag_at(ref_index);
510 const int ref_kind = cp->method_handle_ref_kind_at(index);
511
512 switch (ref_kind) {
513 case JVM_REF_getField:
514 case JVM_REF_getStatic:
515 case JVM_REF_putField:
516 case JVM_REF_putStatic: {
517 check_property(
518 tag.is_field(),
519 "Invalid constant pool index %u in class file %s (not a field)",
520 ref_index, CHECK);
521 break;
522 }
523 case JVM_REF_invokeVirtual:
524 case JVM_REF_newInvokeSpecial: {
525 check_property(
526 tag.is_method(),
527 "Invalid constant pool index %u in class file %s (not a method)",
528 ref_index, CHECK);
529 break;
530 }
531 case JVM_REF_invokeStatic:
532 case JVM_REF_invokeSpecial: {
533 check_property(
534 tag.is_method() ||
535 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
536 "Invalid constant pool index %u in class file %s (not a method)",
537 ref_index, CHECK);
538 break;
539 }
540 case JVM_REF_invokeInterface: {
541 check_property(
542 tag.is_interface_method(),
543 "Invalid constant pool index %u in class file %s (not an interface method)",
544 ref_index, CHECK);
545 break;
546 }
547 default: {
548 classfile_parse_error(
549 "Bad method handle kind at constant pool index %u in class file %s",
550 index, CHECK);
551 }
552 } // switch(refkind)
553 // Keep the ref_index unchanged. It will be indirected at link-time.
554 break;
555 } // case MethodHandle
556 case JVM_CONSTANT_MethodType: {
557 const int ref_index = cp->method_type_index_at(index);
558 check_property(valid_symbol_at(ref_index),
559 "Invalid constant pool index %u in class file %s",
560 ref_index, CHECK);
561 break;
562 }
563 case JVM_CONSTANT_Dynamic: {
564 const int name_and_type_ref_index =
565 cp->invoke_dynamic_name_and_type_ref_index_at(index);
566
567 check_property(valid_cp_range(name_and_type_ref_index, length) &&
568 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
569 "Invalid constant pool index %u in class file %s",
570 name_and_type_ref_index, CHECK);
571 // bootstrap specifier index must be checked later,
572 // when BootstrapMethods attr is available
573
574 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
575 cp->set_has_dynamic_constant();
576 break;
577 }
578 case JVM_CONSTANT_InvokeDynamic: {
579 const int name_and_type_ref_index =
580 cp->invoke_dynamic_name_and_type_ref_index_at(index);
581
582 check_property(valid_cp_range(name_and_type_ref_index, length) &&
583 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
584 "Invalid constant pool index %u in class file %s",
585 name_and_type_ref_index, CHECK);
586 // bootstrap specifier index must be checked later,
587 // when BootstrapMethods attr is available
588 break;
589 }
590 default: {
591 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
592 ShouldNotReachHere();
593 break;
594 }
595 } // switch(tag)
596 } // end of for
597
598 _first_patched_klass_resolved_index = num_klasses;
599 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
600
601 if (_cp_patches != NULL) {
602 // need to treat this_class specially...
603
604 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
605 // for now. These will be replaced with actual names of the patched classes in patch_class().
606 Symbol* s = vmSymbols::star_name();
607 for (int n=_orig_cp_size; n<cp->length(); n++) {
608 cp->symbol_at_put(n, s);
609 }
610
611 int this_class_index;
612 {
613 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
614 const u1* const mark = stream->current();
615 stream->skip_u2_fast(1); // skip flags
616 this_class_index = stream->get_u2_fast();
617 stream->set_current(mark); // revert to mark
618 }
619
620 for (index = 1; index < length; index++) { // Index 0 is unused
621 if (has_cp_patch_at(index)) {
622 guarantee_property(index != this_class_index,
623 "Illegal constant pool patch to self at %d in class file %s",
624 index, CHECK);
625 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
626 }
627 }
628 }
629
630 if (!_need_verify) {
631 return;
632 }
633
634 // second verification pass - checks the strings are of the right format.
635 // but not yet to the other entries
636 for (index = 1; index < length; index++) {
637 const jbyte tag = cp->tag_at(index).value();
638 switch (tag) {
639 case JVM_CONSTANT_UnresolvedClass: {
640 const Symbol* const class_name = cp->klass_name_at(index);
641 // check the name, even if _cp_patches will overwrite it
642 verify_legal_class_name(class_name, CHECK);
643 break;
644 }
645 case JVM_CONSTANT_NameAndType: {
646 if (_need_verify) {
647 const int sig_index = cp->signature_ref_index_at(index);
648 const int name_index = cp->name_ref_index_at(index);
649 const Symbol* const name = cp->symbol_at(name_index);
650 const Symbol* const sig = cp->symbol_at(sig_index);
651 guarantee_property(sig->utf8_length() != 0,
652 "Illegal zero length constant pool entry at %d in class %s",
653 sig_index, CHECK);
654 guarantee_property(name->utf8_length() != 0,
655 "Illegal zero length constant pool entry at %d in class %s",
656 name_index, CHECK);
657
658 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
659 // Format check method name and signature
660 verify_legal_method_name(name, CHECK);
661 verify_legal_method_signature(name, sig, CHECK);
662 } else {
663 // Format check field name and signature
664 verify_legal_field_name(name, CHECK);
665 verify_legal_field_signature(name, sig, CHECK);
666 }
667 }
668 break;
669 }
670 case JVM_CONSTANT_Dynamic: {
671 const int name_and_type_ref_index =
672 cp->name_and_type_ref_index_at(index);
673 // already verified to be utf8
674 const int name_ref_index =
675 cp->name_ref_index_at(name_and_type_ref_index);
676 // already verified to be utf8
677 const int signature_ref_index =
678 cp->signature_ref_index_at(name_and_type_ref_index);
679 const Symbol* const name = cp->symbol_at(name_ref_index);
680 const Symbol* const signature = cp->symbol_at(signature_ref_index);
681 if (_need_verify) {
682 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
683 // Need only to be sure signature is non-zero length and the right type.
684 if (signature->utf8_length() == 0 ||
685 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
686 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
687 }
688 }
689 break;
690 }
691 case JVM_CONSTANT_InvokeDynamic:
692 case JVM_CONSTANT_Fieldref:
693 case JVM_CONSTANT_Methodref:
694 case JVM_CONSTANT_InterfaceMethodref: {
695 const int name_and_type_ref_index =
696 cp->name_and_type_ref_index_at(index);
697 // already verified to be utf8
698 const int name_ref_index =
699 cp->name_ref_index_at(name_and_type_ref_index);
700 // already verified to be utf8
701 const int signature_ref_index =
702 cp->signature_ref_index_at(name_and_type_ref_index);
703 const Symbol* const name = cp->symbol_at(name_ref_index);
704 const Symbol* const signature = cp->symbol_at(signature_ref_index);
705 if (tag == JVM_CONSTANT_Fieldref) {
706 if (_need_verify) {
707 // Field name and signature are verified above, when iterating NameAndType_info.
708 // Need only to be sure signature is non-zero length and the right type.
709 if (signature->utf8_length() == 0 ||
710 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
711 throwIllegalSignature("Field", name, signature, CHECK);
712 }
713 }
714 } else {
715 if (_need_verify) {
716 // Method name and signature are verified above, when iterating NameAndType_info.
717 // Need only to be sure signature is non-zero length and the right type.
718 if (signature->utf8_length() == 0 ||
719 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
720 throwIllegalSignature("Method", name, signature, CHECK);
721 }
722 }
723 // 4509014: If a class method name begins with '<', it must be "<init>"
724 const unsigned int name_len = name->utf8_length();
725 if (tag == JVM_CONSTANT_Methodref &&
726 name_len != 0 &&
727 name->char_at(0) == '<' &&
728 name != vmSymbols::object_initializer_name()) {
729 classfile_parse_error(
730 "Bad method name at constant pool index %u in class file %s",
731 name_ref_index, CHECK);
732 }
733 }
734 break;
735 }
736 case JVM_CONSTANT_MethodHandle: {
737 const int ref_index = cp->method_handle_index_at(index);
738 const int ref_kind = cp->method_handle_ref_kind_at(index);
739 switch (ref_kind) {
740 case JVM_REF_invokeVirtual:
741 case JVM_REF_invokeStatic:
742 case JVM_REF_invokeSpecial:
743 case JVM_REF_newInvokeSpecial: {
744 const int name_and_type_ref_index =
745 cp->name_and_type_ref_index_at(ref_index);
746 const int name_ref_index =
747 cp->name_ref_index_at(name_and_type_ref_index);
748 const Symbol* const name = cp->symbol_at(name_ref_index);
749 if (ref_kind == JVM_REF_newInvokeSpecial) {
750 if (name != vmSymbols::object_initializer_name()) {
751 classfile_parse_error(
752 "Bad constructor name at constant pool index %u in class file %s",
753 name_ref_index, CHECK);
754 }
755 } else {
756 if (name == vmSymbols::object_initializer_name()) {
757 classfile_parse_error(
758 "Bad method name at constant pool index %u in class file %s",
759 name_ref_index, CHECK);
760 }
761 }
762 break;
763 }
764 // Other ref_kinds are already fully checked in previous pass.
765 } // switch(ref_kind)
766 break;
767 }
768 case JVM_CONSTANT_MethodType: {
769 const Symbol* const no_name = vmSymbols::type_name(); // place holder
770 const Symbol* const signature = cp->method_type_signature_at(index);
771 verify_legal_method_signature(no_name, signature, CHECK);
772 break;
773 }
774 case JVM_CONSTANT_Utf8: {
775 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
776 }
777 } // switch(tag)
778 } // end of for
779 }
780
781 Handle ClassFileParser::clear_cp_patch_at(int index) {
782 Handle patch = cp_patch_at(index);
783 _cp_patches->at_put(index, Handle());
784 assert(!has_cp_patch_at(index), "");
785 return patch;
786 }
787
788 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
789 int name_index = _orig_cp_size + _num_patched_klasses;
790 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
791
792 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
793 _num_patched_klasses ++;
794 }
795
796 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
797 int index,
798 Handle patch,
799 TRAPS) {
800 assert(cp != NULL, "invariant");
801
802 BasicType patch_type = T_VOID;
803
804 switch (cp->tag_at(index).value()) {
805
806 case JVM_CONSTANT_UnresolvedClass: {
807 // Patching a class means pre-resolving it.
808 // The name in the constant pool is ignored.
809 if (java_lang_Class::is_instance(patch())) {
810 guarantee_property(!java_lang_Class::is_primitive(patch()),
811 "Illegal class patch at %d in class file %s",
812 index, CHECK);
813 Klass* k = java_lang_Class::as_Klass(patch());
814 patch_class(cp, index, k, k->name());
815 } else {
816 guarantee_property(java_lang_String::is_instance(patch()),
817 "Illegal class patch at %d in class file %s",
818 index, CHECK);
819 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
820 patch_class(cp, index, NULL, name);
821 }
822 break;
823 }
824
825 case JVM_CONSTANT_String: {
826 // skip this patch and don't clear it. Needs the oop array for resolved
827 // references to be created first.
828 return;
829 }
830 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
831 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
832 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
833 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
834 patch_prim:
835 {
836 jvalue value;
837 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
838 guarantee_property(value_type == patch_type,
839 "Illegal primitive patch at %d in class file %s",
840 index, CHECK);
841 switch (value_type) {
842 case T_INT: cp->int_at_put(index, value.i); break;
843 case T_FLOAT: cp->float_at_put(index, value.f); break;
844 case T_LONG: cp->long_at_put(index, value.j); break;
845 case T_DOUBLE: cp->double_at_put(index, value.d); break;
846 default: assert(false, "");
847 }
848 } // end patch_prim label
849 break;
850
851 default: {
852 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
853 guarantee_property(!has_cp_patch_at(index),
854 "Illegal unexpected patch at %d in class file %s",
855 index, CHECK);
856 return;
857 }
858 } // end of switch(tag)
859
860 // On fall-through, mark the patch as used.
861 clear_cp_patch_at(index);
862 }
863 class NameSigHash: public ResourceObj {
864 public:
865 const Symbol* _name; // name
866 const Symbol* _sig; // signature
867 NameSigHash* _next; // Next entry in hash table
868 };
869
870 static const int HASH_ROW_SIZE = 256;
871
872 static unsigned int hash(const Symbol* name, const Symbol* sig) {
873 unsigned int raw_hash = 0;
874 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
875 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
876
877 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
878 }
879
880
881 static void initialize_hashtable(NameSigHash** table) {
882 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
883 }
884 // Return false if the name/sig combination is found in table.
885 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
886 // The old format checker uses heap sort to find duplicates.
887 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
888 // of table since we don't expect Symbol*'s to move.
889 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
890 assert(name != NULL, "name in constant pool is NULL");
891
892 // First lookup for duplicates
893 int index = hash(name, sig);
894 NameSigHash* entry = table[index];
895 while (entry != NULL) {
896 if (entry->_name == name && entry->_sig == sig) {
897 return false;
898 }
899 entry = entry->_next;
900 }
901
902 // No duplicate is found, allocate a new entry and fill it.
903 entry = new NameSigHash();
904 entry->_name = name;
905 entry->_sig = sig;
906
907 // Insert into hash table
908 entry->_next = table[index];
909 table[index] = entry;
910
911 return true;
912 }
913
914 // Side-effects: populates the _local_interfaces field
915 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
916 const int itfs_len,
917 ConstantPool* const cp,
918 bool* const has_nonstatic_concrete_methods,
919 TRAPS) {
920 assert(stream != NULL, "invariant");
921 assert(cp != NULL, "invariant");
922 assert(has_nonstatic_concrete_methods != NULL, "invariant");
923
924 if (itfs_len == 0) {
925 _local_interfaces = Universe::the_empty_instance_klass_array();
926 } else {
927 assert(itfs_len > 0, "only called for len>0");
928 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
929
930 int index;
931 for (index = 0; index < itfs_len; index++) {
932 const u2 interface_index = stream->get_u2(CHECK);
933 Klass* interf;
934 check_property(
935 valid_klass_reference_at(interface_index),
936 "Interface name has bad constant pool index %u in class file %s",
937 interface_index, CHECK);
938 if (cp->tag_at(interface_index).is_klass()) {
939 interf = cp->resolved_klass_at(interface_index);
940 } else {
941 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
942
943 // Don't need to check legal name because it's checked when parsing constant pool.
944 // But need to make sure it's not an array type.
945 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
946 "Bad interface name in class file %s", CHECK);
947
948 // Call resolve_super so classcircularity is checked
949 interf = SystemDictionary::resolve_super_or_fail(
950 _class_name,
951 unresolved_klass,
952 Handle(THREAD, _loader_data->class_loader()),
953 _protection_domain,
954 false,
955 CHECK);
956 }
957
958 if (!interf->is_interface()) {
959 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
960 err_msg("class %s can not implement %s, because it is not an interface (%s)",
961 _class_name->as_klass_external_name(),
962 interf->external_name(),
963 interf->class_in_module_of_loader()));
964 }
965
966 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
967 *has_nonstatic_concrete_methods = true;
968 }
969 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
970 }
971
972 if (!_need_verify || itfs_len <= 1) {
973 return;
974 }
975
976 // Check if there's any duplicates in interfaces
977 ResourceMark rm(THREAD);
978 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
979 NameSigHash*,
980 HASH_ROW_SIZE);
981 initialize_hashtable(interface_names);
982 bool dup = false;
983 const Symbol* name = NULL;
984 {
985 debug_only(NoSafepointVerifier nsv;)
986 for (index = 0; index < itfs_len; index++) {
987 const InstanceKlass* const k = _local_interfaces->at(index);
988 name = k->name();
989 // If no duplicates, add (name, NULL) in hashtable interface_names.
990 if (!put_after_lookup(name, NULL, interface_names)) {
991 dup = true;
992 break;
993 }
994 }
995 }
996 if (dup) {
997 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
998 name->as_C_string(), CHECK);
999 }
1000 }
1001 }
1002
1003 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1004 int constantvalue_index,
1005 int signature_index,
1006 TRAPS) const {
1007 // Make sure the constant pool entry is of a type appropriate to this field
1008 guarantee_property(
1009 (constantvalue_index > 0 &&
1010 constantvalue_index < cp->length()),
1011 "Bad initial value index %u in ConstantValue attribute in class file %s",
1012 constantvalue_index, CHECK);
1013
1014 const constantTag value_type = cp->tag_at(constantvalue_index);
1015 switch(cp->basic_type_for_signature_at(signature_index)) {
1016 case T_LONG: {
1017 guarantee_property(value_type.is_long(),
1018 "Inconsistent constant value type in class file %s",
1019 CHECK);
1020 break;
1021 }
1022 case T_FLOAT: {
1023 guarantee_property(value_type.is_float(),
1024 "Inconsistent constant value type in class file %s",
1025 CHECK);
1026 break;
1027 }
1028 case T_DOUBLE: {
1029 guarantee_property(value_type.is_double(),
1030 "Inconsistent constant value type in class file %s",
1031 CHECK);
1032 break;
1033 }
1034 case T_BYTE:
1035 case T_CHAR:
1036 case T_SHORT:
1037 case T_BOOLEAN:
1038 case T_INT: {
1039 guarantee_property(value_type.is_int(),
1040 "Inconsistent constant value type in class file %s",
1041 CHECK);
1042 break;
1043 }
1044 case T_OBJECT: {
1045 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1046 && value_type.is_string()),
1047 "Bad string initial value in class file %s",
1048 CHECK);
1049 break;
1050 }
1051 default: {
1052 classfile_parse_error("Unable to set initial value %u in class file %s",
1053 constantvalue_index,
1054 CHECK);
1055 }
1056 }
1057 }
1058
1059 class AnnotationCollector : public ResourceObj{
1060 public:
1061 enum Location { _in_field, _in_method, _in_class };
1062 enum ID {
1063 _unknown = 0,
1064 _method_CallerSensitive,
1065 _method_ForceInline,
1066 _method_DontInline,
1067 _method_InjectedProfile,
1068 _method_LambdaForm_Compiled,
1069 _method_LambdaForm_Hidden,
1070 _method_HotSpotIntrinsicCandidate,
1071 _jdk_internal_vm_annotation_Contended,
1072 _field_Stable,
1073 _jdk_internal_vm_annotation_ReservedStackAccess,
1074 _annotation_LIMIT
1075 };
1076 const Location _location;
1077 int _annotations_present;
1078 u2 _contended_group;
1079
1080 AnnotationCollector(Location location)
1081 : _location(location), _annotations_present(0)
1082 {
1083 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1084 }
1085 // If this annotation name has an ID, report it (or _none).
1086 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, const bool can_access_vm_annotations);
1087 // Set the annotation name:
1088 void set_annotation(ID id) {
1089 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1090 _annotations_present |= nth_bit((int)id);
1091 }
1092
1093 void remove_annotation(ID id) {
1094 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1095 _annotations_present &= ~nth_bit((int)id);
1096 }
1097
1098 // Report if the annotation is present.
1099 bool has_any_annotations() const { return _annotations_present != 0; }
1100 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1101
1102 void set_contended_group(u2 group) { _contended_group = group; }
1103 u2 contended_group() const { return _contended_group; }
1104
1105 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1106
1107 void set_stable(bool stable) { set_annotation(_field_Stable); }
1108 bool is_stable() const { return has_annotation(_field_Stable); }
1109 };
1110
1111 // This class also doubles as a holder for metadata cleanup.
1112 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1113 private:
1114 ClassLoaderData* _loader_data;
1115 AnnotationArray* _field_annotations;
1116 AnnotationArray* _field_type_annotations;
1117 public:
1118 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1119 AnnotationCollector(_in_field),
1120 _loader_data(loader_data),
1121 _field_annotations(NULL),
1122 _field_type_annotations(NULL) {}
1123 ~FieldAnnotationCollector();
1124 void apply_to(FieldInfo* f);
1125 AnnotationArray* field_annotations() { return _field_annotations; }
1126 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1127
1128 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1129 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1130 };
1131
1132 class MethodAnnotationCollector : public AnnotationCollector{
1133 public:
1134 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1135 void apply_to(const methodHandle& m);
1136 };
1137
1138 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1139 public:
1140 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1141 void apply_to(InstanceKlass* ik);
1142 };
1143
1144
1145 static int skip_annotation_value(const u1*, int, int); // fwd decl
1146
1147 // Safely increment index by val if does not pass limit
1148 #define SAFE_ADD(index, limit, val) \
1149 if (index >= limit - val) return limit; \
1150 index += val;
1151
1152 // Skip an annotation. Return >=limit if there is any problem.
1153 static int skip_annotation(const u1* buffer, int limit, int index) {
1154 assert(buffer != NULL, "invariant");
1155 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1156 // value := switch (tag:u1) { ... }
1157 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1158 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1159 while (--nmem >= 0 && index < limit) {
1160 SAFE_ADD(index, limit, 2); // skip member
1161 index = skip_annotation_value(buffer, limit, index);
1162 }
1163 return index;
1164 }
1165
1166 // Skip an annotation value. Return >=limit if there is any problem.
1167 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1168 assert(buffer != NULL, "invariant");
1169
1170 // value := switch (tag:u1) {
1171 // case B, C, I, S, Z, D, F, J, c: con:u2;
1172 // case e: e_class:u2 e_name:u2;
1173 // case s: s_con:u2;
1174 // case [: do(nval:u2) {value};
1175 // case @: annotation;
1176 // case s: s_con:u2;
1177 // }
1178 SAFE_ADD(index, limit, 1); // read tag
1179 const u1 tag = buffer[index - 1];
1180 switch (tag) {
1181 case 'B':
1182 case 'C':
1183 case 'I':
1184 case 'S':
1185 case 'Z':
1186 case 'D':
1187 case 'F':
1188 case 'J':
1189 case 'c':
1190 case 's':
1191 SAFE_ADD(index, limit, 2); // skip con or s_con
1192 break;
1193 case 'e':
1194 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1195 break;
1196 case '[':
1197 {
1198 SAFE_ADD(index, limit, 2); // read nval
1199 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1200 while (--nval >= 0 && index < limit) {
1201 index = skip_annotation_value(buffer, limit, index);
1202 }
1203 }
1204 break;
1205 case '@':
1206 index = skip_annotation(buffer, limit, index);
1207 break;
1208 default:
1209 return limit; // bad tag byte
1210 }
1211 return index;
1212 }
1213
1214 // Sift through annotations, looking for those significant to the VM:
1215 static void parse_annotations(const ConstantPool* const cp,
1216 const u1* buffer, int limit,
1217 AnnotationCollector* coll,
1218 ClassLoaderData* loader_data,
1219 const bool can_access_vm_annotations,
1220 TRAPS) {
1221
1222 assert(cp != NULL, "invariant");
1223 assert(buffer != NULL, "invariant");
1224 assert(coll != NULL, "invariant");
1225 assert(loader_data != NULL, "invariant");
1226
1227 // annotations := do(nann:u2) {annotation}
1228 int index = 2; // read nann
1229 if (index >= limit) return;
1230 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1231 enum { // initial annotation layout
1232 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1233 count_off = 2, // u2 such as 1 (one value)
1234 member_off = 4, // utf8 such as 'value'
1235 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1236 e_tag_val = 'e',
1237 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1238 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1239 e_size = 11, // end of 'e' annotation
1240 c_tag_val = 'c', // payload is type
1241 c_con_off = 7, // utf8 payload, such as 'I'
1242 c_size = 9, // end of 'c' annotation
1243 s_tag_val = 's', // payload is String
1244 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1245 s_size = 9,
1246 min_size = 6 // smallest possible size (zero members)
1247 };
1248 // Cannot add min_size to index in case of overflow MAX_INT
1249 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1250 int index0 = index;
1251 index = skip_annotation(buffer, limit, index);
1252 const u1* const abase = buffer + index0;
1253 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1254 const int count = Bytes::get_Java_u2((address)abase + count_off);
1255 const Symbol* const aname = check_symbol_at(cp, atype);
1256 if (aname == NULL) break; // invalid annotation name
1257 const Symbol* member = NULL;
1258 if (count >= 1) {
1259 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1260 member = check_symbol_at(cp, member_index);
1261 if (member == NULL) break; // invalid member name
1262 }
1263
1264 // Here is where parsing particular annotations will take place.
1265 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1266 if (AnnotationCollector::_unknown == id) continue;
1267 coll->set_annotation(id);
1268
1269 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1270 // @Contended can optionally specify the contention group.
1271 //
1272 // Contended group defines the equivalence class over the fields:
1273 // the fields within the same contended group are not treated distinct.
1274 // The only exception is default group, which does not incur the
1275 // equivalence. Naturally, contention group for classes is meaningless.
1276 //
1277 // While the contention group is specified as String, annotation
1278 // values are already interned, and we might as well use the constant
1279 // pool index as the group tag.
1280 //
1281 u2 group_index = 0; // default contended group
1282 if (count == 1
1283 && s_size == (index - index0) // match size
1284 && s_tag_val == *(abase + tag_off)
1285 && member == vmSymbols::value_name()) {
1286 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1287 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1288 group_index = 0; // default contended group
1289 }
1290 }
1291 coll->set_contended_group(group_index);
1292 }
1293 }
1294 }
1295
1296
1297 // Parse attributes for a field.
1298 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1299 u2 attributes_count,
1300 bool is_static, u2 signature_index,
1301 u2* const constantvalue_index_addr,
1302 bool* const is_synthetic_addr,
1303 u2* const generic_signature_index_addr,
1304 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1305 TRAPS) {
1306 assert(cfs != NULL, "invariant");
1307 assert(constantvalue_index_addr != NULL, "invariant");
1308 assert(is_synthetic_addr != NULL, "invariant");
1309 assert(generic_signature_index_addr != NULL, "invariant");
1310 assert(parsed_annotations != NULL, "invariant");
1311 assert(attributes_count > 0, "attributes_count should be greater than 0");
1312
1313 u2 constantvalue_index = 0;
1314 u2 generic_signature_index = 0;
1315 bool is_synthetic = false;
1316 const u1* runtime_visible_annotations = NULL;
1317 int runtime_visible_annotations_length = 0;
1318 const u1* runtime_invisible_annotations = NULL;
1319 int runtime_invisible_annotations_length = 0;
1320 const u1* runtime_visible_type_annotations = NULL;
1321 int runtime_visible_type_annotations_length = 0;
1322 const u1* runtime_invisible_type_annotations = NULL;
1323 int runtime_invisible_type_annotations_length = 0;
1324 bool runtime_invisible_annotations_exists = false;
1325 bool runtime_invisible_type_annotations_exists = false;
1326 const ConstantPool* const cp = _cp;
1327
1328 while (attributes_count--) {
1329 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1330 const u2 attribute_name_index = cfs->get_u2_fast();
1331 const u4 attribute_length = cfs->get_u4_fast();
1332 check_property(valid_symbol_at(attribute_name_index),
1333 "Invalid field attribute index %u in class file %s",
1334 attribute_name_index,
1335 CHECK);
1336
1337 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1338 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1339 // ignore if non-static
1340 if (constantvalue_index != 0) {
1341 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1342 }
1343 check_property(
1344 attribute_length == 2,
1345 "Invalid ConstantValue field attribute length %u in class file %s",
1346 attribute_length, CHECK);
1347
1348 constantvalue_index = cfs->get_u2(CHECK);
1349 if (_need_verify) {
1350 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1351 }
1352 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1353 if (attribute_length != 0) {
1354 classfile_parse_error(
1355 "Invalid Synthetic field attribute length %u in class file %s",
1356 attribute_length, CHECK);
1357 }
1358 is_synthetic = true;
1359 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1360 if (attribute_length != 0) {
1361 classfile_parse_error(
1362 "Invalid Deprecated field attribute length %u in class file %s",
1363 attribute_length, CHECK);
1364 }
1365 } else if (_major_version >= JAVA_1_5_VERSION) {
1366 if (attribute_name == vmSymbols::tag_signature()) {
1367 if (generic_signature_index != 0) {
1368 classfile_parse_error(
1369 "Multiple Signature attributes for field in class file %s", CHECK);
1370 }
1371 if (attribute_length != 2) {
1372 classfile_parse_error(
1373 "Wrong size %u for field's Signature attribute in class file %s",
1374 attribute_length, CHECK);
1375 }
1376 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1377 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1378 if (runtime_visible_annotations != NULL) {
1379 classfile_parse_error(
1380 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1381 }
1382 runtime_visible_annotations_length = attribute_length;
1383 runtime_visible_annotations = cfs->current();
1384 assert(runtime_visible_annotations != NULL, "null visible annotations");
1385 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1386 parse_annotations(cp,
1387 runtime_visible_annotations,
1388 runtime_visible_annotations_length,
1389 parsed_annotations,
1390 _loader_data,
1391 _can_access_vm_annotations,
1392 CHECK);
1393 cfs->skip_u1_fast(runtime_visible_annotations_length);
1394 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1395 if (runtime_invisible_annotations_exists) {
1396 classfile_parse_error(
1397 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1398 }
1399 runtime_invisible_annotations_exists = true;
1400 if (PreserveAllAnnotations) {
1401 runtime_invisible_annotations_length = attribute_length;
1402 runtime_invisible_annotations = cfs->current();
1403 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1404 }
1405 cfs->skip_u1(attribute_length, CHECK);
1406 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1407 if (runtime_visible_type_annotations != NULL) {
1408 classfile_parse_error(
1409 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1410 }
1411 runtime_visible_type_annotations_length = attribute_length;
1412 runtime_visible_type_annotations = cfs->current();
1413 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1414 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1415 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1416 if (runtime_invisible_type_annotations_exists) {
1417 classfile_parse_error(
1418 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1419 } else {
1420 runtime_invisible_type_annotations_exists = true;
1421 }
1422 if (PreserveAllAnnotations) {
1423 runtime_invisible_type_annotations_length = attribute_length;
1424 runtime_invisible_type_annotations = cfs->current();
1425 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1426 }
1427 cfs->skip_u1(attribute_length, CHECK);
1428 } else {
1429 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1430 }
1431 } else {
1432 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1433 }
1434 }
1435
1436 *constantvalue_index_addr = constantvalue_index;
1437 *is_synthetic_addr = is_synthetic;
1438 *generic_signature_index_addr = generic_signature_index;
1439 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1440 runtime_visible_annotations_length,
1441 runtime_invisible_annotations,
1442 runtime_invisible_annotations_length,
1443 CHECK);
1444 parsed_annotations->set_field_annotations(a);
1445 a = assemble_annotations(runtime_visible_type_annotations,
1446 runtime_visible_type_annotations_length,
1447 runtime_invisible_type_annotations,
1448 runtime_invisible_type_annotations_length,
1449 CHECK);
1450 parsed_annotations->set_field_type_annotations(a);
1451 return;
1452 }
1453
1454
1455 // Field allocation types. Used for computing field offsets.
1456
1457 enum FieldAllocationType {
1458 STATIC_OOP, // Oops
1459 STATIC_BYTE, // Boolean, Byte, char
1460 STATIC_SHORT, // shorts
1461 STATIC_WORD, // ints
1462 STATIC_DOUBLE, // aligned long or double
1463 NONSTATIC_OOP,
1464 NONSTATIC_BYTE,
1465 NONSTATIC_SHORT,
1466 NONSTATIC_WORD,
1467 NONSTATIC_DOUBLE,
1468 MAX_FIELD_ALLOCATION_TYPE,
1469 BAD_ALLOCATION_TYPE = -1
1470 };
1471
1472 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1473 BAD_ALLOCATION_TYPE, // 0
1474 BAD_ALLOCATION_TYPE, // 1
1475 BAD_ALLOCATION_TYPE, // 2
1476 BAD_ALLOCATION_TYPE, // 3
1477 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1478 NONSTATIC_SHORT, // T_CHAR = 5,
1479 NONSTATIC_WORD, // T_FLOAT = 6,
1480 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1481 NONSTATIC_BYTE, // T_BYTE = 8,
1482 NONSTATIC_SHORT, // T_SHORT = 9,
1483 NONSTATIC_WORD, // T_INT = 10,
1484 NONSTATIC_DOUBLE, // T_LONG = 11,
1485 NONSTATIC_OOP, // T_OBJECT = 12,
1486 NONSTATIC_OOP, // T_ARRAY = 13,
1487 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1488 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1489 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1490 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1491 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1492 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1493 BAD_ALLOCATION_TYPE, // 0
1494 BAD_ALLOCATION_TYPE, // 1
1495 BAD_ALLOCATION_TYPE, // 2
1496 BAD_ALLOCATION_TYPE, // 3
1497 STATIC_BYTE , // T_BOOLEAN = 4,
1498 STATIC_SHORT, // T_CHAR = 5,
1499 STATIC_WORD, // T_FLOAT = 6,
1500 STATIC_DOUBLE, // T_DOUBLE = 7,
1501 STATIC_BYTE, // T_BYTE = 8,
1502 STATIC_SHORT, // T_SHORT = 9,
1503 STATIC_WORD, // T_INT = 10,
1504 STATIC_DOUBLE, // T_LONG = 11,
1505 STATIC_OOP, // T_OBJECT = 12,
1506 STATIC_OOP, // T_ARRAY = 13,
1507 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1508 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1509 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1510 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1511 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1512 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1513 };
1514
1515 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1516 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1517 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1518 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1519 return result;
1520 }
1521
1522 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1523 public:
1524 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1525
1526 FieldAllocationCount() {
1527 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1528 count[i] = 0;
1529 }
1530 }
1531
1532 FieldAllocationType update(bool is_static, BasicType type) {
1533 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1534 if (atype != BAD_ALLOCATION_TYPE) {
1535 // Make sure there is no overflow with injected fields.
1536 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1537 count[atype]++;
1538 }
1539 return atype;
1540 }
1541 };
1542
1543 // Side-effects: populates the _fields, _fields_annotations,
1544 // _fields_type_annotations fields
1545 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1546 bool is_interface,
1547 FieldAllocationCount* const fac,
1548 ConstantPool* cp,
1549 const int cp_size,
1550 u2* const java_fields_count_ptr,
1551 TRAPS) {
1552
1553 assert(cfs != NULL, "invariant");
1554 assert(fac != NULL, "invariant");
1555 assert(cp != NULL, "invariant");
1556 assert(java_fields_count_ptr != NULL, "invariant");
1557
1558 assert(NULL == _fields, "invariant");
1559 assert(NULL == _fields_annotations, "invariant");
1560 assert(NULL == _fields_type_annotations, "invariant");
1561
1562 cfs->guarantee_more(2, CHECK); // length
1563 const u2 length = cfs->get_u2_fast();
1564 *java_fields_count_ptr = length;
1565
1566 int num_injected = 0;
1567 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1568 &num_injected);
1569 const int total_fields = length + num_injected;
1570
1571 // The field array starts with tuples of shorts
1572 // [access, name index, sig index, initial value index, byte offset].
1573 // A generic signature slot only exists for field with generic
1574 // signature attribute. And the access flag is set with
1575 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1576 // signature slots are at the end of the field array and after all
1577 // other fields data.
1578 //
1579 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1580 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1581 // ...
1582 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1583 // [generic signature index]
1584 // [generic signature index]
1585 // ...
1586 //
1587 // Allocate a temporary resource array for field data. For each field,
1588 // a slot is reserved in the temporary array for the generic signature
1589 // index. After parsing all fields, the data are copied to a permanent
1590 // array and any unused slots will be discarded.
1591 ResourceMark rm(THREAD);
1592 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1593 u2,
1594 total_fields * (FieldInfo::field_slots + 1));
1595
1596 // The generic signature slots start after all other fields' data.
1597 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1598 int num_generic_signature = 0;
1599 for (int n = 0; n < length; n++) {
1600 // access_flags, name_index, descriptor_index, attributes_count
1601 cfs->guarantee_more(8, CHECK);
1602
1603 AccessFlags access_flags;
1604 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1605 verify_legal_field_modifiers(flags, is_interface, CHECK);
1606 access_flags.set_flags(flags);
1607
1608 const u2 name_index = cfs->get_u2_fast();
1609 check_property(valid_symbol_at(name_index),
1610 "Invalid constant pool index %u for field name in class file %s",
1611 name_index, CHECK);
1612 const Symbol* const name = cp->symbol_at(name_index);
1613 verify_legal_field_name(name, CHECK);
1614
1615 const u2 signature_index = cfs->get_u2_fast();
1616 check_property(valid_symbol_at(signature_index),
1617 "Invalid constant pool index %u for field signature in class file %s",
1618 signature_index, CHECK);
1619 const Symbol* const sig = cp->symbol_at(signature_index);
1620 verify_legal_field_signature(name, sig, CHECK);
1621
1622 u2 constantvalue_index = 0;
1623 bool is_synthetic = false;
1624 u2 generic_signature_index = 0;
1625 const bool is_static = access_flags.is_static();
1626 FieldAnnotationCollector parsed_annotations(_loader_data);
1627
1628 const u2 attributes_count = cfs->get_u2_fast();
1629 if (attributes_count > 0) {
1630 parse_field_attributes(cfs,
1631 attributes_count,
1632 is_static,
1633 signature_index,
1634 &constantvalue_index,
1635 &is_synthetic,
1636 &generic_signature_index,
1637 &parsed_annotations,
1638 CHECK);
1639
1640 if (parsed_annotations.field_annotations() != NULL) {
1641 if (_fields_annotations == NULL) {
1642 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1643 _loader_data, length, NULL,
1644 CHECK);
1645 }
1646 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1647 parsed_annotations.set_field_annotations(NULL);
1648 }
1649 if (parsed_annotations.field_type_annotations() != NULL) {
1650 if (_fields_type_annotations == NULL) {
1651 _fields_type_annotations =
1652 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1653 length,
1654 NULL,
1655 CHECK);
1656 }
1657 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1658 parsed_annotations.set_field_type_annotations(NULL);
1659 }
1660
1661 if (is_synthetic) {
1662 access_flags.set_is_synthetic();
1663 }
1664 if (generic_signature_index != 0) {
1665 access_flags.set_field_has_generic_signature();
1666 fa[generic_signature_slot] = generic_signature_index;
1667 generic_signature_slot ++;
1668 num_generic_signature ++;
1669 }
1670 }
1671
1672 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1673 field->initialize(access_flags.as_short(),
1674 name_index,
1675 signature_index,
1676 constantvalue_index);
1677 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1678
1679 // Remember how many oops we encountered and compute allocation type
1680 const FieldAllocationType atype = fac->update(is_static, type);
1681 field->set_allocation_type(atype);
1682
1683 // After field is initialized with type, we can augment it with aux info
1684 if (parsed_annotations.has_any_annotations())
1685 parsed_annotations.apply_to(field);
1686 }
1687
1688 int index = length;
1689 if (num_injected != 0) {
1690 for (int n = 0; n < num_injected; n++) {
1691 // Check for duplicates
1692 if (injected[n].may_be_java) {
1693 const Symbol* const name = injected[n].name();
1694 const Symbol* const signature = injected[n].signature();
1695 bool duplicate = false;
1696 for (int i = 0; i < length; i++) {
1697 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1698 if (name == cp->symbol_at(f->name_index()) &&
1699 signature == cp->symbol_at(f->signature_index())) {
1700 // Symbol is desclared in Java so skip this one
1701 duplicate = true;
1702 break;
1703 }
1704 }
1705 if (duplicate) {
1706 // These will be removed from the field array at the end
1707 continue;
1708 }
1709 }
1710
1711 // Injected field
1712 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1713 field->initialize(JVM_ACC_FIELD_INTERNAL,
1714 injected[n].name_index,
1715 injected[n].signature_index,
1716 0);
1717
1718 const BasicType type = FieldType::basic_type(injected[n].signature());
1719
1720 // Remember how many oops we encountered and compute allocation type
1721 const FieldAllocationType atype = fac->update(false, type);
1722 field->set_allocation_type(atype);
1723 index++;
1724 }
1725 }
1726
1727 assert(NULL == _fields, "invariant");
1728
1729 _fields =
1730 MetadataFactory::new_array<u2>(_loader_data,
1731 index * FieldInfo::field_slots + num_generic_signature,
1732 CHECK);
1733 // Sometimes injected fields already exist in the Java source so
1734 // the fields array could be too long. In that case the
1735 // fields array is trimed. Also unused slots that were reserved
1736 // for generic signature indexes are discarded.
1737 {
1738 int i = 0;
1739 for (; i < index * FieldInfo::field_slots; i++) {
1740 _fields->at_put(i, fa[i]);
1741 }
1742 for (int j = total_fields * FieldInfo::field_slots;
1743 j < generic_signature_slot; j++) {
1744 _fields->at_put(i++, fa[j]);
1745 }
1746 assert(_fields->length() == i, "");
1747 }
1748
1749 if (_need_verify && length > 1) {
1750 // Check duplicated fields
1751 ResourceMark rm(THREAD);
1752 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1753 THREAD, NameSigHash*, HASH_ROW_SIZE);
1754 initialize_hashtable(names_and_sigs);
1755 bool dup = false;
1756 const Symbol* name = NULL;
1757 const Symbol* sig = NULL;
1758 {
1759 debug_only(NoSafepointVerifier nsv;)
1760 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1761 name = fs.name();
1762 sig = fs.signature();
1763 // If no duplicates, add name/signature in hashtable names_and_sigs.
1764 if (!put_after_lookup(name, sig, names_and_sigs)) {
1765 dup = true;
1766 break;
1767 }
1768 }
1769 }
1770 if (dup) {
1771 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1772 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1773 }
1774 }
1775 }
1776
1777
1778 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1779 u4 code_length,
1780 u4 exception_table_length,
1781 TRAPS) {
1782 assert(cfs != NULL, "invariant");
1783
1784 const unsafe_u2* const exception_table_start = cfs->current();
1785 assert(exception_table_start != NULL, "null exception table");
1786
1787 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1788 // end_pc,
1789 // handler_pc,
1790 // catch_type_index
1791
1792 // Will check legal target after parsing code array in verifier.
1793 if (_need_verify) {
1794 for (unsigned int i = 0; i < exception_table_length; i++) {
1795 const u2 start_pc = cfs->get_u2_fast();
1796 const u2 end_pc = cfs->get_u2_fast();
1797 const u2 handler_pc = cfs->get_u2_fast();
1798 const u2 catch_type_index = cfs->get_u2_fast();
1799 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1800 "Illegal exception table range in class file %s",
1801 CHECK_NULL);
1802 guarantee_property(handler_pc < code_length,
1803 "Illegal exception table handler in class file %s",
1804 CHECK_NULL);
1805 if (catch_type_index != 0) {
1806 guarantee_property(valid_klass_reference_at(catch_type_index),
1807 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1808 }
1809 }
1810 } else {
1811 cfs->skip_u2_fast(exception_table_length * 4);
1812 }
1813 return exception_table_start;
1814 }
1815
1816 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1817 u4 code_length,
1818 CompressedLineNumberWriteStream**const write_stream,
1819 TRAPS) {
1820
1821 const ClassFileStream* const cfs = _stream;
1822 unsigned int num_entries = cfs->get_u2(CHECK);
1823
1824 // Each entry is a u2 start_pc, and a u2 line_number
1825 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1826
1827 // Verify line number attribute and table length
1828 check_property(
1829 code_attribute_length == sizeof(u2) + length_in_bytes,
1830 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1831
1832 cfs->guarantee_more(length_in_bytes, CHECK);
1833
1834 if ((*write_stream) == NULL) {
1835 if (length_in_bytes > fixed_buffer_size) {
1836 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1837 } else {
1838 (*write_stream) = new CompressedLineNumberWriteStream(
1839 _linenumbertable_buffer, fixed_buffer_size);
1840 }
1841 }
1842
1843 while (num_entries-- > 0) {
1844 const u2 bci = cfs->get_u2_fast(); // start_pc
1845 const u2 line = cfs->get_u2_fast(); // line_number
1846 guarantee_property(bci < code_length,
1847 "Invalid pc in LineNumberTable in class file %s", CHECK);
1848 (*write_stream)->write_pair(bci, line);
1849 }
1850 }
1851
1852
1853 class LVT_Hash : public AllStatic {
1854 public:
1855
1856 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1857 /*
1858 * 3-tuple start_bci/length/slot has to be unique key,
1859 * so the following comparison seems to be redundant:
1860 * && elem->name_cp_index == entry->_elem->name_cp_index
1861 */
1862 return (e0.start_bci == e1.start_bci &&
1863 e0.length == e1.length &&
1864 e0.name_cp_index == e1.name_cp_index &&
1865 e0.slot == e1.slot);
1866 }
1867
1868 static unsigned int hash(LocalVariableTableElement const& e0) {
1869 unsigned int raw_hash = e0.start_bci;
1870
1871 raw_hash = e0.length + raw_hash * 37;
1872 raw_hash = e0.name_cp_index + raw_hash * 37;
1873 raw_hash = e0.slot + raw_hash * 37;
1874
1875 return raw_hash;
1876 }
1877 };
1878
1879
1880 // Class file LocalVariableTable elements.
1881 class Classfile_LVT_Element {
1882 public:
1883 u2 start_bci;
1884 u2 length;
1885 u2 name_cp_index;
1886 u2 descriptor_cp_index;
1887 u2 slot;
1888 };
1889
1890 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1891 LocalVariableTableElement* const lvt) {
1892 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1893 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1894 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1895 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1896 lvt->signature_cp_index = 0;
1897 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1898 }
1899
1900 // Function is used to parse both attributes:
1901 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1902 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1903 u4 code_length,
1904 u2 max_locals,
1905 u4 code_attribute_length,
1906 u2* const localvariable_table_length,
1907 bool isLVTT,
1908 TRAPS) {
1909 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1910 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1911 const unsigned int size =
1912 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1913
1914 const ConstantPool* const cp = _cp;
1915
1916 // Verify local variable table attribute has right length
1917 if (_need_verify) {
1918 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1919 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1920 }
1921
1922 const unsafe_u2* const localvariable_table_start = cfs->current();
1923 assert(localvariable_table_start != NULL, "null local variable table");
1924 if (!_need_verify) {
1925 cfs->skip_u2_fast(size);
1926 } else {
1927 cfs->guarantee_more(size * 2, CHECK_NULL);
1928 for(int i = 0; i < (*localvariable_table_length); i++) {
1929 const u2 start_pc = cfs->get_u2_fast();
1930 const u2 length = cfs->get_u2_fast();
1931 const u2 name_index = cfs->get_u2_fast();
1932 const u2 descriptor_index = cfs->get_u2_fast();
1933 const u2 index = cfs->get_u2_fast();
1934 // Assign to a u4 to avoid overflow
1935 const u4 end_pc = (u4)start_pc + (u4)length;
1936
1937 if (start_pc >= code_length) {
1938 classfile_parse_error(
1939 "Invalid start_pc %u in %s in class file %s",
1940 start_pc, tbl_name, CHECK_NULL);
1941 }
1942 if (end_pc > code_length) {
1943 classfile_parse_error(
1944 "Invalid length %u in %s in class file %s",
1945 length, tbl_name, CHECK_NULL);
1946 }
1947 const int cp_size = cp->length();
1948 guarantee_property(valid_symbol_at(name_index),
1949 "Name index %u in %s has bad constant type in class file %s",
1950 name_index, tbl_name, CHECK_NULL);
1951 guarantee_property(valid_symbol_at(descriptor_index),
1952 "Signature index %u in %s has bad constant type in class file %s",
1953 descriptor_index, tbl_name, CHECK_NULL);
1954
1955 const Symbol* const name = cp->symbol_at(name_index);
1956 const Symbol* const sig = cp->symbol_at(descriptor_index);
1957 verify_legal_field_name(name, CHECK_NULL);
1958 u2 extra_slot = 0;
1959 if (!isLVTT) {
1960 verify_legal_field_signature(name, sig, CHECK_NULL);
1961
1962 // 4894874: check special cases for double and long local variables
1963 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1964 sig == vmSymbols::type_signature(T_LONG)) {
1965 extra_slot = 1;
1966 }
1967 }
1968 guarantee_property((index + extra_slot) < max_locals,
1969 "Invalid index %u in %s in class file %s",
1970 index, tbl_name, CHECK_NULL);
1971 }
1972 }
1973 return localvariable_table_start;
1974 }
1975
1976
1977 void ClassFileParser::parse_type_array(u2 array_length,
1978 u4 code_length,
1979 u4* const u1_index,
1980 u4* const u2_index,
1981 u1* const u1_array,
1982 u2* const u2_array,
1983 TRAPS) {
1984 const ClassFileStream* const cfs = _stream;
1985 u2 index = 0; // index in the array with long/double occupying two slots
1986 u4 i1 = *u1_index;
1987 u4 i2 = *u2_index + 1;
1988 for(int i = 0; i < array_length; i++) {
1989 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1990 index++;
1991 if (tag == ITEM_Long || tag == ITEM_Double) {
1992 index++;
1993 } else if (tag == ITEM_Object) {
1994 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1995 guarantee_property(valid_klass_reference_at(class_index),
1996 "Bad class index %u in StackMap in class file %s",
1997 class_index, CHECK);
1998 } else if (tag == ITEM_Uninitialized) {
1999 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
2000 guarantee_property(
2001 offset < code_length,
2002 "Bad uninitialized type offset %u in StackMap in class file %s",
2003 offset, CHECK);
2004 } else {
2005 guarantee_property(
2006 tag <= (u1)ITEM_Uninitialized,
2007 "Unknown variable type %u in StackMap in class file %s",
2008 tag, CHECK);
2009 }
2010 }
2011 u2_array[*u2_index] = index;
2012 *u1_index = i1;
2013 *u2_index = i2;
2014 }
2015
2016 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
2017 u4 code_attribute_length,
2018 bool need_verify,
2019 TRAPS) {
2020 assert(cfs != NULL, "invariant");
2021
2022 if (0 == code_attribute_length) {
2023 return NULL;
2024 }
2025
2026 const u1* const stackmap_table_start = cfs->current();
2027 assert(stackmap_table_start != NULL, "null stackmap table");
2028
2029 // check code_attribute_length first
2030 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2031
2032 if (!need_verify && !DumpSharedSpaces) {
2033 return NULL;
2034 }
2035 return stackmap_table_start;
2036 }
2037
2038 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2039 u2* const checked_exceptions_length,
2040 u4 method_attribute_length,
2041 TRAPS) {
2042 assert(cfs != NULL, "invariant");
2043 assert(checked_exceptions_length != NULL, "invariant");
2044
2045 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2046 *checked_exceptions_length = cfs->get_u2_fast();
2047 const unsigned int size =
2048 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2049 const unsafe_u2* const checked_exceptions_start = cfs->current();
2050 assert(checked_exceptions_start != NULL, "null checked exceptions");
2051 if (!_need_verify) {
2052 cfs->skip_u2_fast(size);
2053 } else {
2054 // Verify each value in the checked exception table
2055 u2 checked_exception;
2056 const u2 len = *checked_exceptions_length;
2057 cfs->guarantee_more(2 * len, CHECK_NULL);
2058 for (int i = 0; i < len; i++) {
2059 checked_exception = cfs->get_u2_fast();
2060 check_property(
2061 valid_klass_reference_at(checked_exception),
2062 "Exception name has bad type at constant pool %u in class file %s",
2063 checked_exception, CHECK_NULL);
2064 }
2065 }
2066 // check exceptions attribute length
2067 if (_need_verify) {
2068 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2069 sizeof(u2) * size),
2070 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2071 }
2072 return checked_exceptions_start;
2073 }
2074
2075 void ClassFileParser::throwIllegalSignature(const char* type,
2076 const Symbol* name,
2077 const Symbol* sig,
2078 TRAPS) const {
2079 assert(name != NULL, "invariant");
2080 assert(sig != NULL, "invariant");
2081
2082 ResourceMark rm(THREAD);
2083 Exceptions::fthrow(THREAD_AND_LOCATION,
2084 vmSymbols::java_lang_ClassFormatError(),
2085 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2086 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2087 }
2088
2089 AnnotationCollector::ID
2090 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2091 const Symbol* name,
2092 const bool can_access_vm_annotations) {
2093 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2094 // Privileged code can use all annotations. Other code silently drops some.
2095 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2096 loader_data->is_platform_class_loader_data() ||
2097 loader_data->is_shortlived() ||
2098 can_access_vm_annotations;
2099 switch (sid) {
2100 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2101 if (_location != _in_method) break; // only allow for methods
2102 if (!privileged) break; // only allow in privileged code
2103 return _method_CallerSensitive;
2104 }
2105 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2106 if (_location != _in_method) break; // only allow for methods
2107 if (!privileged) break; // only allow in privileged code
2108 return _method_ForceInline;
2109 }
2110 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2111 if (_location != _in_method) break; // only allow for methods
2112 if (!privileged) break; // only allow in privileged code
2113 return _method_DontInline;
2114 }
2115 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2116 if (_location != _in_method) break; // only allow for methods
2117 if (!privileged) break; // only allow in privileged code
2118 return _method_InjectedProfile;
2119 }
2120 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2121 if (_location != _in_method) break; // only allow for methods
2122 if (!privileged) break; // only allow in privileged code
2123 return _method_LambdaForm_Compiled;
2124 }
2125 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2126 if (_location != _in_method) break; // only allow for methods
2127 if (!privileged) break; // only allow in privileged code
2128 return _method_LambdaForm_Hidden;
2129 }
2130 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2131 if (_location != _in_method) break; // only allow for methods
2132 if (!privileged) break; // only allow in privileged code
2133 return _method_HotSpotIntrinsicCandidate;
2134 }
2135 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2136 if (_location != _in_field) break; // only allow for fields
2137 if (!privileged) break; // only allow in privileged code
2138 return _field_Stable;
2139 }
2140 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2141 if (_location != _in_field && _location != _in_class) {
2142 break; // only allow for fields and classes
2143 }
2144 if (!EnableContended || (RestrictContended && !privileged)) {
2145 break; // honor privileges
2146 }
2147 return _jdk_internal_vm_annotation_Contended;
2148 }
2149 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2150 if (_location != _in_method) break; // only allow for methods
2151 if (RestrictReservedStack && !privileged) break; // honor privileges
2152 return _jdk_internal_vm_annotation_ReservedStackAccess;
2153 }
2154 default: {
2155 break;
2156 }
2157 }
2158 return AnnotationCollector::_unknown;
2159 }
2160
2161 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2162 if (is_contended())
2163 f->set_contended_group(contended_group());
2164 if (is_stable())
2165 f->set_stable(true);
2166 }
2167
2168 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2169 // If there's an error deallocate metadata for field annotations
2170 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2171 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2172 }
2173
2174 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2175 if (has_annotation(_method_CallerSensitive))
2176 m->set_caller_sensitive(true);
2177 if (has_annotation(_method_ForceInline))
2178 m->set_force_inline(true);
2179 if (has_annotation(_method_DontInline))
2180 m->set_dont_inline(true);
2181 if (has_annotation(_method_InjectedProfile))
2182 m->set_has_injected_profile(true);
2183 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2184 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2185 if (has_annotation(_method_LambdaForm_Hidden))
2186 m->set_hidden(true);
2187 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2188 m->set_intrinsic_candidate(true);
2189 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2190 m->set_has_reserved_stack_access(true);
2191 }
2192
2193 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2194 assert(ik != NULL, "invariant");
2195 ik->set_is_contended(is_contended());
2196 }
2197
2198 #define MAX_ARGS_SIZE 255
2199 #define MAX_CODE_SIZE 65535
2200 #define INITIAL_MAX_LVT_NUMBER 256
2201
2202 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2203 *
2204 * Rules for LVT's and LVTT's are:
2205 * - There can be any number of LVT's and LVTT's.
2206 * - If there are n LVT's, it is the same as if there was just
2207 * one LVT containing all the entries from the n LVT's.
2208 * - There may be no more than one LVT entry per local variable.
2209 * Two LVT entries are 'equal' if these fields are the same:
2210 * start_pc, length, name, slot
2211 * - There may be no more than one LVTT entry per each LVT entry.
2212 * Each LVTT entry has to match some LVT entry.
2213 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2214 */
2215 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2216 int lvt_cnt,
2217 u2* const localvariable_table_length,
2218 const unsafe_u2** const localvariable_table_start,
2219 int lvtt_cnt,
2220 u2* const localvariable_type_table_length,
2221 const unsafe_u2** const localvariable_type_table_start,
2222 TRAPS) {
2223
2224 ResourceMark rm(THREAD);
2225
2226 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2227 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2228
2229 LVT_HashTable* const table = new LVT_HashTable();
2230
2231 // To fill LocalVariableTable in
2232 const Classfile_LVT_Element* cf_lvt;
2233 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2234
2235 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2236 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2237 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2238 copy_lvt_element(&cf_lvt[idx], lvt);
2239 // If no duplicates, add LVT elem in hashtable.
2240 if (table->put(*lvt, lvt) == false
2241 && _need_verify
2242 && _major_version >= JAVA_1_5_VERSION) {
2243 classfile_parse_error("Duplicated LocalVariableTable attribute "
2244 "entry for '%s' in class file %s",
2245 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2246 CHECK);
2247 }
2248 }
2249 }
2250
2251 // To merge LocalVariableTable and LocalVariableTypeTable
2252 const Classfile_LVT_Element* cf_lvtt;
2253 LocalVariableTableElement lvtt_elem;
2254
2255 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2256 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2257 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2258 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2259 LocalVariableTableElement** entry = table->get(lvtt_elem);
2260 if (entry == NULL) {
2261 if (_need_verify) {
2262 classfile_parse_error("LVTT entry for '%s' in class file %s "
2263 "does not match any LVT entry",
2264 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2265 CHECK);
2266 }
2267 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2268 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2269 "entry for '%s' in class file %s",
2270 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2271 CHECK);
2272 } else {
2273 // to add generic signatures into LocalVariableTable
2274 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2275 }
2276 }
2277 }
2278 }
2279
2280
2281 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2282 const u1* runtime_visible_annotations,
2283 int runtime_visible_annotations_length,
2284 const u1* runtime_invisible_annotations,
2285 int runtime_invisible_annotations_length,
2286 const u1* runtime_visible_parameter_annotations,
2287 int runtime_visible_parameter_annotations_length,
2288 const u1* runtime_invisible_parameter_annotations,
2289 int runtime_invisible_parameter_annotations_length,
2290 const u1* runtime_visible_type_annotations,
2291 int runtime_visible_type_annotations_length,
2292 const u1* runtime_invisible_type_annotations,
2293 int runtime_invisible_type_annotations_length,
2294 const u1* annotation_default,
2295 int annotation_default_length,
2296 TRAPS) {
2297
2298 AnnotationArray* a;
2299
2300 if (runtime_visible_annotations_length +
2301 runtime_invisible_annotations_length > 0) {
2302 a = assemble_annotations(runtime_visible_annotations,
2303 runtime_visible_annotations_length,
2304 runtime_invisible_annotations,
2305 runtime_invisible_annotations_length,
2306 CHECK);
2307 cm->set_method_annotations(a);
2308 }
2309
2310 if (runtime_visible_parameter_annotations_length +
2311 runtime_invisible_parameter_annotations_length > 0) {
2312 a = assemble_annotations(runtime_visible_parameter_annotations,
2313 runtime_visible_parameter_annotations_length,
2314 runtime_invisible_parameter_annotations,
2315 runtime_invisible_parameter_annotations_length,
2316 CHECK);
2317 cm->set_parameter_annotations(a);
2318 }
2319
2320 if (annotation_default_length > 0) {
2321 a = assemble_annotations(annotation_default,
2322 annotation_default_length,
2323 NULL,
2324 0,
2325 CHECK);
2326 cm->set_default_annotations(a);
2327 }
2328
2329 if (runtime_visible_type_annotations_length +
2330 runtime_invisible_type_annotations_length > 0) {
2331 a = assemble_annotations(runtime_visible_type_annotations,
2332 runtime_visible_type_annotations_length,
2333 runtime_invisible_type_annotations,
2334 runtime_invisible_type_annotations_length,
2335 CHECK);
2336 cm->set_type_annotations(a);
2337 }
2338 }
2339
2340
2341 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2342 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2343 // Method* to save footprint, so we only know the size of the resulting Method* when the
2344 // entire method attribute is parsed.
2345 //
2346 // The promoted_flags parameter is used to pass relevant access_flags
2347 // from the method back up to the containing klass. These flag values
2348 // are added to klass's access_flags.
2349
2350 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2351 bool is_interface,
2352 const ConstantPool* cp,
2353 AccessFlags* const promoted_flags,
2354 TRAPS) {
2355 assert(cfs != NULL, "invariant");
2356 assert(cp != NULL, "invariant");
2357 assert(promoted_flags != NULL, "invariant");
2358
2359 ResourceMark rm(THREAD);
2360 // Parse fixed parts:
2361 // access_flags, name_index, descriptor_index, attributes_count
2362 cfs->guarantee_more(8, CHECK_NULL);
2363
2364 int flags = cfs->get_u2_fast();
2365 const u2 name_index = cfs->get_u2_fast();
2366 const int cp_size = cp->length();
2367 check_property(
2368 valid_symbol_at(name_index),
2369 "Illegal constant pool index %u for method name in class file %s",
2370 name_index, CHECK_NULL);
2371 const Symbol* const name = cp->symbol_at(name_index);
2372 verify_legal_method_name(name, CHECK_NULL);
2373
2374 const u2 signature_index = cfs->get_u2_fast();
2375 guarantee_property(
2376 valid_symbol_at(signature_index),
2377 "Illegal constant pool index %u for method signature in class file %s",
2378 signature_index, CHECK_NULL);
2379 const Symbol* const signature = cp->symbol_at(signature_index);
2380
2381 if (name == vmSymbols::class_initializer_name()) {
2382 // We ignore the other access flags for a valid class initializer.
2383 // (JVM Spec 2nd ed., chapter 4.6)
2384 if (_major_version < 51) { // backward compatibility
2385 flags = JVM_ACC_STATIC;
2386 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2387 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2388 } else {
2389 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2390 }
2391 } else {
2392 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2393 }
2394
2395 if (name == vmSymbols::object_initializer_name() && is_interface) {
2396 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2397 }
2398
2399 int args_size = -1; // only used when _need_verify is true
2400 if (_need_verify) {
2401 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2402 verify_legal_method_signature(name, signature, CHECK_NULL);
2403 if (args_size > MAX_ARGS_SIZE) {
2404 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2405 }
2406 }
2407
2408 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2409
2410 // Default values for code and exceptions attribute elements
2411 u2 max_stack = 0;
2412 u2 max_locals = 0;
2413 u4 code_length = 0;
2414 const u1* code_start = 0;
2415 u2 exception_table_length = 0;
2416 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2417 Array<int>* exception_handlers = Universe::the_empty_int_array();
2418 u2 checked_exceptions_length = 0;
2419 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2420 CompressedLineNumberWriteStream* linenumber_table = NULL;
2421 int linenumber_table_length = 0;
2422 int total_lvt_length = 0;
2423 u2 lvt_cnt = 0;
2424 u2 lvtt_cnt = 0;
2425 bool lvt_allocated = false;
2426 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2427 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2428 u2* localvariable_table_length = NULL;
2429 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2430 u2* localvariable_type_table_length = NULL;
2431 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2432 int method_parameters_length = -1;
2433 const u1* method_parameters_data = NULL;
2434 bool method_parameters_seen = false;
2435 bool parsed_code_attribute = false;
2436 bool parsed_checked_exceptions_attribute = false;
2437 bool parsed_stackmap_attribute = false;
2438 // stackmap attribute - JDK1.5
2439 const u1* stackmap_data = NULL;
2440 int stackmap_data_length = 0;
2441 u2 generic_signature_index = 0;
2442 MethodAnnotationCollector parsed_annotations;
2443 const u1* runtime_visible_annotations = NULL;
2444 int runtime_visible_annotations_length = 0;
2445 const u1* runtime_invisible_annotations = NULL;
2446 int runtime_invisible_annotations_length = 0;
2447 const u1* runtime_visible_parameter_annotations = NULL;
2448 int runtime_visible_parameter_annotations_length = 0;
2449 const u1* runtime_invisible_parameter_annotations = NULL;
2450 int runtime_invisible_parameter_annotations_length = 0;
2451 const u1* runtime_visible_type_annotations = NULL;
2452 int runtime_visible_type_annotations_length = 0;
2453 const u1* runtime_invisible_type_annotations = NULL;
2454 int runtime_invisible_type_annotations_length = 0;
2455 bool runtime_invisible_annotations_exists = false;
2456 bool runtime_invisible_type_annotations_exists = false;
2457 bool runtime_invisible_parameter_annotations_exists = false;
2458 const u1* annotation_default = NULL;
2459 int annotation_default_length = 0;
2460
2461 // Parse code and exceptions attribute
2462 u2 method_attributes_count = cfs->get_u2_fast();
2463 while (method_attributes_count--) {
2464 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2465 const u2 method_attribute_name_index = cfs->get_u2_fast();
2466 const u4 method_attribute_length = cfs->get_u4_fast();
2467 check_property(
2468 valid_symbol_at(method_attribute_name_index),
2469 "Invalid method attribute name index %u in class file %s",
2470 method_attribute_name_index, CHECK_NULL);
2471
2472 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2473 if (method_attribute_name == vmSymbols::tag_code()) {
2474 // Parse Code attribute
2475 if (_need_verify) {
2476 guarantee_property(
2477 !access_flags.is_native() && !access_flags.is_abstract(),
2478 "Code attribute in native or abstract methods in class file %s",
2479 CHECK_NULL);
2480 }
2481 if (parsed_code_attribute) {
2482 classfile_parse_error("Multiple Code attributes in class file %s",
2483 CHECK_NULL);
2484 }
2485 parsed_code_attribute = true;
2486
2487 // Stack size, locals size, and code size
2488 if (_major_version == 45 && _minor_version <= 2) {
2489 cfs->guarantee_more(4, CHECK_NULL);
2490 max_stack = cfs->get_u1_fast();
2491 max_locals = cfs->get_u1_fast();
2492 code_length = cfs->get_u2_fast();
2493 } else {
2494 cfs->guarantee_more(8, CHECK_NULL);
2495 max_stack = cfs->get_u2_fast();
2496 max_locals = cfs->get_u2_fast();
2497 code_length = cfs->get_u4_fast();
2498 }
2499 if (_need_verify) {
2500 guarantee_property(args_size <= max_locals,
2501 "Arguments can't fit into locals in class file %s",
2502 CHECK_NULL);
2503 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2504 "Invalid method Code length %u in class file %s",
2505 code_length, CHECK_NULL);
2506 }
2507 // Code pointer
2508 code_start = cfs->current();
2509 assert(code_start != NULL, "null code start");
2510 cfs->guarantee_more(code_length, CHECK_NULL);
2511 cfs->skip_u1_fast(code_length);
2512
2513 // Exception handler table
2514 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2515 exception_table_length = cfs->get_u2_fast();
2516 if (exception_table_length > 0) {
2517 exception_table_start = parse_exception_table(cfs,
2518 code_length,
2519 exception_table_length,
2520 CHECK_NULL);
2521 }
2522
2523 // Parse additional attributes in code attribute
2524 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2525 u2 code_attributes_count = cfs->get_u2_fast();
2526
2527 unsigned int calculated_attribute_length = 0;
2528
2529 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2530 calculated_attribute_length =
2531 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2532 } else {
2533 // max_stack, locals and length are smaller in pre-version 45.2 classes
2534 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2535 }
2536 calculated_attribute_length +=
2537 code_length +
2538 sizeof(exception_table_length) +
2539 sizeof(code_attributes_count) +
2540 exception_table_length *
2541 ( sizeof(u2) + // start_pc
2542 sizeof(u2) + // end_pc
2543 sizeof(u2) + // handler_pc
2544 sizeof(u2) ); // catch_type_index
2545
2546 while (code_attributes_count--) {
2547 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2548 const u2 code_attribute_name_index = cfs->get_u2_fast();
2549 const u4 code_attribute_length = cfs->get_u4_fast();
2550 calculated_attribute_length += code_attribute_length +
2551 sizeof(code_attribute_name_index) +
2552 sizeof(code_attribute_length);
2553 check_property(valid_symbol_at(code_attribute_name_index),
2554 "Invalid code attribute name index %u in class file %s",
2555 code_attribute_name_index,
2556 CHECK_NULL);
2557 if (LoadLineNumberTables &&
2558 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2559 // Parse and compress line number table
2560 parse_linenumber_table(code_attribute_length,
2561 code_length,
2562 &linenumber_table,
2563 CHECK_NULL);
2564
2565 } else if (LoadLocalVariableTables &&
2566 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2567 // Parse local variable table
2568 if (!lvt_allocated) {
2569 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2570 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2571 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2572 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2573 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2574 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2575 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2576 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2577 lvt_allocated = true;
2578 }
2579 if (lvt_cnt == max_lvt_cnt) {
2580 max_lvt_cnt <<= 1;
2581 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2582 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2583 }
2584 localvariable_table_start[lvt_cnt] =
2585 parse_localvariable_table(cfs,
2586 code_length,
2587 max_locals,
2588 code_attribute_length,
2589 &localvariable_table_length[lvt_cnt],
2590 false, // is not LVTT
2591 CHECK_NULL);
2592 total_lvt_length += localvariable_table_length[lvt_cnt];
2593 lvt_cnt++;
2594 } else if (LoadLocalVariableTypeTables &&
2595 _major_version >= JAVA_1_5_VERSION &&
2596 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2597 if (!lvt_allocated) {
2598 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2599 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2600 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2601 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2602 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2603 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2604 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2605 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2606 lvt_allocated = true;
2607 }
2608 // Parse local variable type table
2609 if (lvtt_cnt == max_lvtt_cnt) {
2610 max_lvtt_cnt <<= 1;
2611 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2612 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2613 }
2614 localvariable_type_table_start[lvtt_cnt] =
2615 parse_localvariable_table(cfs,
2616 code_length,
2617 max_locals,
2618 code_attribute_length,
2619 &localvariable_type_table_length[lvtt_cnt],
2620 true, // is LVTT
2621 CHECK_NULL);
2622 lvtt_cnt++;
2623 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2624 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2625 // Stack map is only needed by the new verifier in JDK1.5.
2626 if (parsed_stackmap_attribute) {
2627 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2628 }
2629 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2630 stackmap_data_length = code_attribute_length;
2631 parsed_stackmap_attribute = true;
2632 } else {
2633 // Skip unknown attributes
2634 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2635 }
2636 }
2637 // check method attribute length
2638 if (_need_verify) {
2639 guarantee_property(method_attribute_length == calculated_attribute_length,
2640 "Code segment has wrong length in class file %s",
2641 CHECK_NULL);
2642 }
2643 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2644 // Parse Exceptions attribute
2645 if (parsed_checked_exceptions_attribute) {
2646 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2647 CHECK_NULL);
2648 }
2649 parsed_checked_exceptions_attribute = true;
2650 checked_exceptions_start =
2651 parse_checked_exceptions(cfs,
2652 &checked_exceptions_length,
2653 method_attribute_length,
2654 CHECK_NULL);
2655 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2656 // reject multiple method parameters
2657 if (method_parameters_seen) {
2658 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2659 CHECK_NULL);
2660 }
2661 method_parameters_seen = true;
2662 method_parameters_length = cfs->get_u1_fast();
2663 const u2 real_length = (method_parameters_length * 4u) + 1u;
2664 if (method_attribute_length != real_length) {
2665 classfile_parse_error(
2666 "Invalid MethodParameters method attribute length %u in class file",
2667 method_attribute_length, CHECK_NULL);
2668 }
2669 method_parameters_data = cfs->current();
2670 cfs->skip_u2_fast(method_parameters_length);
2671 cfs->skip_u2_fast(method_parameters_length);
2672 // ignore this attribute if it cannot be reflected
2673 if (!SystemDictionary::Parameter_klass_loaded())
2674 method_parameters_length = -1;
2675 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2676 if (method_attribute_length != 0) {
2677 classfile_parse_error(
2678 "Invalid Synthetic method attribute length %u in class file %s",
2679 method_attribute_length, CHECK_NULL);
2680 }
2681 // Should we check that there hasn't already been a synthetic attribute?
2682 access_flags.set_is_synthetic();
2683 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2684 if (method_attribute_length != 0) {
2685 classfile_parse_error(
2686 "Invalid Deprecated method attribute length %u in class file %s",
2687 method_attribute_length, CHECK_NULL);
2688 }
2689 } else if (_major_version >= JAVA_1_5_VERSION) {
2690 if (method_attribute_name == vmSymbols::tag_signature()) {
2691 if (generic_signature_index != 0) {
2692 classfile_parse_error(
2693 "Multiple Signature attributes for method in class file %s",
2694 CHECK_NULL);
2695 }
2696 if (method_attribute_length != 2) {
2697 classfile_parse_error(
2698 "Invalid Signature attribute length %u in class file %s",
2699 method_attribute_length, CHECK_NULL);
2700 }
2701 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2702 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2703 if (runtime_visible_annotations != NULL) {
2704 classfile_parse_error(
2705 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2706 CHECK_NULL);
2707 }
2708 runtime_visible_annotations_length = method_attribute_length;
2709 runtime_visible_annotations = cfs->current();
2710 assert(runtime_visible_annotations != NULL, "null visible annotations");
2711 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2712 parse_annotations(cp,
2713 runtime_visible_annotations,
2714 runtime_visible_annotations_length,
2715 &parsed_annotations,
2716 _loader_data,
2717 _can_access_vm_annotations,
2718 CHECK_NULL);
2719 cfs->skip_u1_fast(runtime_visible_annotations_length);
2720 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2721 if (runtime_invisible_annotations_exists) {
2722 classfile_parse_error(
2723 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2724 CHECK_NULL);
2725 }
2726 runtime_invisible_annotations_exists = true;
2727 if (PreserveAllAnnotations) {
2728 runtime_invisible_annotations_length = method_attribute_length;
2729 runtime_invisible_annotations = cfs->current();
2730 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2731 }
2732 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2733 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2734 if (runtime_visible_parameter_annotations != NULL) {
2735 classfile_parse_error(
2736 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2737 CHECK_NULL);
2738 }
2739 runtime_visible_parameter_annotations_length = method_attribute_length;
2740 runtime_visible_parameter_annotations = cfs->current();
2741 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2742 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2743 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2744 if (runtime_invisible_parameter_annotations_exists) {
2745 classfile_parse_error(
2746 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2747 CHECK_NULL);
2748 }
2749 runtime_invisible_parameter_annotations_exists = true;
2750 if (PreserveAllAnnotations) {
2751 runtime_invisible_parameter_annotations_length = method_attribute_length;
2752 runtime_invisible_parameter_annotations = cfs->current();
2753 assert(runtime_invisible_parameter_annotations != NULL,
2754 "null invisible parameter annotations");
2755 }
2756 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2757 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2758 if (annotation_default != NULL) {
2759 classfile_parse_error(
2760 "Multiple AnnotationDefault attributes for method in class file %s",
2761 CHECK_NULL);
2762 }
2763 annotation_default_length = method_attribute_length;
2764 annotation_default = cfs->current();
2765 assert(annotation_default != NULL, "null annotation default");
2766 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2767 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2768 if (runtime_visible_type_annotations != NULL) {
2769 classfile_parse_error(
2770 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2771 CHECK_NULL);
2772 }
2773 runtime_visible_type_annotations_length = method_attribute_length;
2774 runtime_visible_type_annotations = cfs->current();
2775 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2776 // No need for the VM to parse Type annotations
2777 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2778 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2779 if (runtime_invisible_type_annotations_exists) {
2780 classfile_parse_error(
2781 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2782 CHECK_NULL);
2783 } else {
2784 runtime_invisible_type_annotations_exists = true;
2785 }
2786 if (PreserveAllAnnotations) {
2787 runtime_invisible_type_annotations_length = method_attribute_length;
2788 runtime_invisible_type_annotations = cfs->current();
2789 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2790 }
2791 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2792 } else {
2793 // Skip unknown attributes
2794 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2795 }
2796 } else {
2797 // Skip unknown attributes
2798 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2799 }
2800 }
2801
2802 if (linenumber_table != NULL) {
2803 linenumber_table->write_terminator();
2804 linenumber_table_length = linenumber_table->position();
2805 }
2806
2807 // Make sure there's at least one Code attribute in non-native/non-abstract method
2808 if (_need_verify) {
2809 guarantee_property(access_flags.is_native() ||
2810 access_flags.is_abstract() ||
2811 parsed_code_attribute,
2812 "Absent Code attribute in method that is not native or abstract in class file %s",
2813 CHECK_NULL);
2814 }
2815
2816 // All sizing information for a Method* is finally available, now create it
2817 InlineTableSizes sizes(
2818 total_lvt_length,
2819 linenumber_table_length,
2820 exception_table_length,
2821 checked_exceptions_length,
2822 method_parameters_length,
2823 generic_signature_index,
2824 runtime_visible_annotations_length +
2825 runtime_invisible_annotations_length,
2826 runtime_visible_parameter_annotations_length +
2827 runtime_invisible_parameter_annotations_length,
2828 runtime_visible_type_annotations_length +
2829 runtime_invisible_type_annotations_length,
2830 annotation_default_length,
2831 0);
2832
2833 Method* const m = Method::allocate(_loader_data,
2834 code_length,
2835 access_flags,
2836 &sizes,
2837 ConstMethod::NORMAL,
2838 CHECK_NULL);
2839
2840 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2841
2842 // Fill in information from fixed part (access_flags already set)
2843 m->set_constants(_cp);
2844 m->set_name_index(name_index);
2845 m->set_signature_index(signature_index);
2846
2847 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2848 m->constMethod()->set_result_type(rtf.type());
2849
2850 if (args_size >= 0) {
2851 m->set_size_of_parameters(args_size);
2852 } else {
2853 m->compute_size_of_parameters(THREAD);
2854 }
2855 #ifdef ASSERT
2856 if (args_size >= 0) {
2857 m->compute_size_of_parameters(THREAD);
2858 assert(args_size == m->size_of_parameters(), "");
2859 }
2860 #endif
2861
2862 // Fill in code attribute information
2863 m->set_max_stack(max_stack);
2864 m->set_max_locals(max_locals);
2865 if (stackmap_data != NULL) {
2866 m->constMethod()->copy_stackmap_data(_loader_data,
2867 (u1*)stackmap_data,
2868 stackmap_data_length,
2869 CHECK_NULL);
2870 }
2871
2872 // Copy byte codes
2873 m->set_code((u1*)code_start);
2874
2875 // Copy line number table
2876 if (linenumber_table != NULL) {
2877 memcpy(m->compressed_linenumber_table(),
2878 linenumber_table->buffer(),
2879 linenumber_table_length);
2880 }
2881
2882 // Copy exception table
2883 if (exception_table_length > 0) {
2884 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2885 m->exception_table_start(),
2886 exception_table_length * sizeof(ExceptionTableElement),
2887 sizeof(u2));
2888 }
2889
2890 // Copy method parameters
2891 if (method_parameters_length > 0) {
2892 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2893 for (int i = 0; i < method_parameters_length; i++) {
2894 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2895 method_parameters_data += 2;
2896 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2897 method_parameters_data += 2;
2898 }
2899 }
2900
2901 // Copy checked exceptions
2902 if (checked_exceptions_length > 0) {
2903 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2904 m->checked_exceptions_start(),
2905 checked_exceptions_length * sizeof(CheckedExceptionElement),
2906 sizeof(u2));
2907 }
2908
2909 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2910 if (total_lvt_length > 0) {
2911 promoted_flags->set_has_localvariable_table();
2912 copy_localvariable_table(m->constMethod(),
2913 lvt_cnt,
2914 localvariable_table_length,
2915 localvariable_table_start,
2916 lvtt_cnt,
2917 localvariable_type_table_length,
2918 localvariable_type_table_start,
2919 CHECK_NULL);
2920 }
2921
2922 if (parsed_annotations.has_any_annotations())
2923 parsed_annotations.apply_to(m);
2924
2925 // Copy annotations
2926 copy_method_annotations(m->constMethod(),
2927 runtime_visible_annotations,
2928 runtime_visible_annotations_length,
2929 runtime_invisible_annotations,
2930 runtime_invisible_annotations_length,
2931 runtime_visible_parameter_annotations,
2932 runtime_visible_parameter_annotations_length,
2933 runtime_invisible_parameter_annotations,
2934 runtime_invisible_parameter_annotations_length,
2935 runtime_visible_type_annotations,
2936 runtime_visible_type_annotations_length,
2937 runtime_invisible_type_annotations,
2938 runtime_invisible_type_annotations_length,
2939 annotation_default,
2940 annotation_default_length,
2941 CHECK_NULL);
2942
2943 if (name == vmSymbols::finalize_method_name() &&
2944 signature == vmSymbols::void_method_signature()) {
2945 if (m->is_empty_method()) {
2946 _has_empty_finalizer = true;
2947 } else {
2948 _has_finalizer = true;
2949 }
2950 }
2951 if (name == vmSymbols::object_initializer_name() &&
2952 signature == vmSymbols::void_method_signature() &&
2953 m->is_vanilla_constructor()) {
2954 _has_vanilla_constructor = true;
2955 }
2956
2957 NOT_PRODUCT(m->verify());
2958 return m;
2959 }
2960
2961
2962 // The promoted_flags parameter is used to pass relevant access_flags
2963 // from the methods back up to the containing klass. These flag values
2964 // are added to klass's access_flags.
2965 // Side-effects: populates the _methods field in the parser
2966 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2967 bool is_interface,
2968 AccessFlags* promoted_flags,
2969 bool* has_final_method,
2970 bool* declares_nonstatic_concrete_methods,
2971 TRAPS) {
2972 assert(cfs != NULL, "invariant");
2973 assert(promoted_flags != NULL, "invariant");
2974 assert(has_final_method != NULL, "invariant");
2975 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2976
2977 assert(NULL == _methods, "invariant");
2978
2979 cfs->guarantee_more(2, CHECK); // length
2980 const u2 length = cfs->get_u2_fast();
2981 if (length == 0) {
2982 _methods = Universe::the_empty_method_array();
2983 } else {
2984 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2985 length,
2986 NULL,
2987 CHECK);
2988
2989 for (int index = 0; index < length; index++) {
2990 Method* method = parse_method(cfs,
2991 is_interface,
2992 _cp,
2993 promoted_flags,
2994 CHECK);
2995
2996 if (method->is_final()) {
2997 *has_final_method = true;
2998 }
2999 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3000 // used for interface initialization, and default method inheritance analysis
3001 if (is_interface && !(*declares_nonstatic_concrete_methods)
3002 && !method->is_abstract() && !method->is_static()) {
3003 *declares_nonstatic_concrete_methods = true;
3004 }
3005 _methods->at_put(index, method);
3006 }
3007
3008 if (_need_verify && length > 1) {
3009 // Check duplicated methods
3010 ResourceMark rm(THREAD);
3011 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3012 THREAD, NameSigHash*, HASH_ROW_SIZE);
3013 initialize_hashtable(names_and_sigs);
3014 bool dup = false;
3015 const Symbol* name = NULL;
3016 const Symbol* sig = NULL;
3017 {
3018 debug_only(NoSafepointVerifier nsv;)
3019 for (int i = 0; i < length; i++) {
3020 const Method* const m = _methods->at(i);
3021 name = m->name();
3022 sig = m->signature();
3023 // If no duplicates, add name/signature in hashtable names_and_sigs.
3024 if (!put_after_lookup(name, sig, names_and_sigs)) {
3025 dup = true;
3026 break;
3027 }
3028 }
3029 }
3030 if (dup) {
3031 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3032 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3033 }
3034 }
3035 }
3036 }
3037
3038 static const intArray* sort_methods(Array<Method*>* methods) {
3039 const int length = methods->length();
3040 // If JVMTI original method ordering or sharing is enabled we have to
3041 // remember the original class file ordering.
3042 // We temporarily use the vtable_index field in the Method* to store the
3043 // class file index, so we can read in after calling qsort.
3044 // Put the method ordering in the shared archive.
3045 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3046 for (int index = 0; index < length; index++) {
3047 Method* const m = methods->at(index);
3048 assert(!m->valid_vtable_index(), "vtable index should not be set");
3049 m->set_vtable_index(index);
3050 }
3051 }
3052 // Sort method array by ascending method name (for faster lookups & vtable construction)
3053 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3054 Method::sort_methods(methods);
3055
3056 intArray* method_ordering = NULL;
3057 // If JVMTI original method ordering or sharing is enabled construct int
3058 // array remembering the original ordering
3059 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3060 method_ordering = new intArray(length, length, -1);
3061 for (int index = 0; index < length; index++) {
3062 Method* const m = methods->at(index);
3063 const int old_index = m->vtable_index();
3064 assert(old_index >= 0 && old_index < length, "invalid method index");
3065 method_ordering->at_put(index, old_index);
3066 m->set_vtable_index(Method::invalid_vtable_index);
3067 }
3068 }
3069 return method_ordering;
3070 }
3071
3072 // Parse generic_signature attribute for methods and fields
3073 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3074 TRAPS) {
3075 assert(cfs != NULL, "invariant");
3076
3077 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3078 const u2 generic_signature_index = cfs->get_u2_fast();
3079 check_property(
3080 valid_symbol_at(generic_signature_index),
3081 "Invalid Signature attribute at constant pool index %u in class file %s",
3082 generic_signature_index, CHECK_0);
3083 return generic_signature_index;
3084 }
3085
3086 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3087 TRAPS) {
3088
3089 assert(cfs != NULL, "invariant");
3090
3091 cfs->guarantee_more(2, CHECK); // sourcefile_index
3092 const u2 sourcefile_index = cfs->get_u2_fast();
3093 check_property(
3094 valid_symbol_at(sourcefile_index),
3095 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3096 sourcefile_index, CHECK);
3097 set_class_sourcefile_index(sourcefile_index);
3098 }
3099
3100 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3101 int length,
3102 TRAPS) {
3103 assert(cfs != NULL, "invariant");
3104
3105 const u1* const sde_buffer = cfs->current();
3106 assert(sde_buffer != NULL, "null sde buffer");
3107
3108 // Don't bother storing it if there is no way to retrieve it
3109 if (JvmtiExport::can_get_source_debug_extension()) {
3110 assert((length+1) > length, "Overflow checking");
3111 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3112 for (int i = 0; i < length; i++) {
3113 sde[i] = sde_buffer[i];
3114 }
3115 sde[length] = '\0';
3116 set_class_sde_buffer((const char*)sde, length);
3117 }
3118 // Got utf8 string, set stream position forward
3119 cfs->skip_u1(length, CHECK);
3120 }
3121
3122
3123 // Inner classes can be static, private or protected (classic VM does this)
3124 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3125 JVM_ACC_PRIVATE | \
3126 JVM_ACC_PROTECTED | \
3127 JVM_ACC_STATIC \
3128 )
3129
3130 // Return number of classes in the inner classes attribute table
3131 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3132 const u1* const inner_classes_attribute_start,
3133 bool parsed_enclosingmethod_attribute,
3134 u2 enclosing_method_class_index,
3135 u2 enclosing_method_method_index,
3136 TRAPS) {
3137 const u1* const current_mark = cfs->current();
3138 u2 length = 0;
3139 if (inner_classes_attribute_start != NULL) {
3140 cfs->set_current(inner_classes_attribute_start);
3141 cfs->guarantee_more(2, CHECK_0); // length
3142 length = cfs->get_u2_fast();
3143 }
3144
3145 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3146 // method data:
3147 // [inner_class_info_index,
3148 // outer_class_info_index,
3149 // inner_name_index,
3150 // inner_class_access_flags,
3151 // ...
3152 // enclosing_method_class_index,
3153 // enclosing_method_method_index]
3154 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3155 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3156 _inner_classes = inner_classes;
3157
3158 int index = 0;
3159 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3160 for (int n = 0; n < length; n++) {
3161 // Inner class index
3162 const u2 inner_class_info_index = cfs->get_u2_fast();
3163 check_property(
3164 valid_klass_reference_at(inner_class_info_index),
3165 "inner_class_info_index %u has bad constant type in class file %s",
3166 inner_class_info_index, CHECK_0);
3167 // Outer class index
3168 const u2 outer_class_info_index = cfs->get_u2_fast();
3169 check_property(
3170 outer_class_info_index == 0 ||
3171 valid_klass_reference_at(outer_class_info_index),
3172 "outer_class_info_index %u has bad constant type in class file %s",
3173 outer_class_info_index, CHECK_0);
3174 // Inner class name
3175 const u2 inner_name_index = cfs->get_u2_fast();
3176 check_property(
3177 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3178 "inner_name_index %u has bad constant type in class file %s",
3179 inner_name_index, CHECK_0);
3180 if (_need_verify) {
3181 guarantee_property(inner_class_info_index != outer_class_info_index,
3182 "Class is both outer and inner class in class file %s", CHECK_0);
3183 }
3184 // Access flags
3185 jint flags;
3186 // JVM_ACC_MODULE is defined in JDK-9 and later.
3187 if (_major_version >= JAVA_9_VERSION) {
3188 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3189 } else {
3190 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3191 }
3192 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3193 // Set abstract bit for old class files for backward compatibility
3194 flags |= JVM_ACC_ABSTRACT;
3195 }
3196 verify_legal_class_modifiers(flags, CHECK_0);
3197 AccessFlags inner_access_flags(flags);
3198
3199 inner_classes->at_put(index++, inner_class_info_index);
3200 inner_classes->at_put(index++, outer_class_info_index);
3201 inner_classes->at_put(index++, inner_name_index);
3202 inner_classes->at_put(index++, inner_access_flags.as_short());
3203 }
3204
3205 // 4347400: make sure there's no duplicate entry in the classes array
3206 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3207 for(int i = 0; i < length * 4; i += 4) {
3208 for(int j = i + 4; j < length * 4; j += 4) {
3209 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3210 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3211 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3212 inner_classes->at(i+3) != inner_classes->at(j+3)),
3213 "Duplicate entry in InnerClasses in class file %s",
3214 CHECK_0);
3215 }
3216 }
3217 }
3218
3219 // Set EnclosingMethod class and method indexes.
3220 if (parsed_enclosingmethod_attribute) {
3221 inner_classes->at_put(index++, enclosing_method_class_index);
3222 inner_classes->at_put(index++, enclosing_method_method_index);
3223 }
3224 assert(index == size, "wrong size");
3225
3226 // Restore buffer's current position.
3227 cfs->set_current(current_mark);
3228
3229 return length;
3230 }
3231
3232 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3233 const u1* const nest_members_attribute_start,
3234 TRAPS) {
3235 const u1* const current_mark = cfs->current();
3236 u2 length = 0;
3237 if (nest_members_attribute_start != NULL) {
3238 cfs->set_current(nest_members_attribute_start);
3239 cfs->guarantee_more(2, CHECK_0); // length
3240 length = cfs->get_u2_fast();
3241 }
3242 const int size = length;
3243 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3244 _nest_members = nest_members;
3245
3246 int index = 0;
3247 cfs->guarantee_more(2 * length, CHECK_0);
3248 for (int n = 0; n < length; n++) {
3249 const u2 class_info_index = cfs->get_u2_fast();
3250 check_property(
3251 valid_klass_reference_at(class_info_index),
3252 "Nest member class_info_index %u has bad constant type in class file %s",
3253 class_info_index, CHECK_0);
3254 nest_members->at_put(index++, class_info_index);
3255 }
3256 assert(index == size, "wrong size");
3257
3258 // Restore buffer's current position.
3259 cfs->set_current(current_mark);
3260
3261 return length;
3262 }
3263
3264 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3265 set_class_synthetic_flag(true);
3266 }
3267
3268 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3269 assert(cfs != NULL, "invariant");
3270
3271 const u2 signature_index = cfs->get_u2(CHECK);
3272 check_property(
3273 valid_symbol_at(signature_index),
3274 "Invalid constant pool index %u in Signature attribute in class file %s",
3275 signature_index, CHECK);
3276 set_class_generic_signature_index(signature_index);
3277 }
3278
3279 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3280 ConstantPool* cp,
3281 u4 attribute_byte_length,
3282 TRAPS) {
3283 assert(cfs != NULL, "invariant");
3284 assert(cp != NULL, "invariant");
3285
3286 const u1* const current_start = cfs->current();
3287
3288 guarantee_property(attribute_byte_length >= sizeof(u2),
3289 "Invalid BootstrapMethods attribute length %u in class file %s",
3290 attribute_byte_length,
3291 CHECK);
3292
3293 cfs->guarantee_more(attribute_byte_length, CHECK);
3294
3295 const int attribute_array_length = cfs->get_u2_fast();
3296
3297 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3298 "Short length on BootstrapMethods in class file %s",
3299 CHECK);
3300
3301
3302 // The attribute contains a counted array of counted tuples of shorts,
3303 // represending bootstrap specifiers:
3304 // length*{bootstrap_method_index, argument_count*{argument_index}}
3305 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3306 // operand_count = number of shorts in attr, except for leading length
3307
3308 // The attribute is copied into a short[] array.
3309 // The array begins with a series of short[2] pairs, one for each tuple.
3310 const int index_size = (attribute_array_length * 2);
3311
3312 Array<u2>* const operands =
3313 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3314
3315 // Eagerly assign operands so they will be deallocated with the constant
3316 // pool if there is an error.
3317 cp->set_operands(operands);
3318
3319 int operand_fill_index = index_size;
3320 const int cp_size = cp->length();
3321
3322 for (int n = 0; n < attribute_array_length; n++) {
3323 // Store a 32-bit offset into the header of the operand array.
3324 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3325
3326 // Read a bootstrap specifier.
3327 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3328 const u2 bootstrap_method_index = cfs->get_u2_fast();
3329 const u2 argument_count = cfs->get_u2_fast();
3330 check_property(
3331 valid_cp_range(bootstrap_method_index, cp_size) &&
3332 cp->tag_at(bootstrap_method_index).is_method_handle(),
3333 "bootstrap_method_index %u has bad constant type in class file %s",
3334 bootstrap_method_index,
3335 CHECK);
3336
3337 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3338 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3339 CHECK);
3340
3341 operands->at_put(operand_fill_index++, bootstrap_method_index);
3342 operands->at_put(operand_fill_index++, argument_count);
3343
3344 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3345 for (int j = 0; j < argument_count; j++) {
3346 const u2 argument_index = cfs->get_u2_fast();
3347 check_property(
3348 valid_cp_range(argument_index, cp_size) &&
3349 cp->tag_at(argument_index).is_loadable_constant(),
3350 "argument_index %u has bad constant type in class file %s",
3351 argument_index,
3352 CHECK);
3353 operands->at_put(operand_fill_index++, argument_index);
3354 }
3355 }
3356 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3357 "Bad length on BootstrapMethods in class file %s",
3358 CHECK);
3359 }
3360
3361 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3362 ConstantPool* cp,
3363 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3364 TRAPS) {
3365 assert(cfs != NULL, "invariant");
3366 assert(cp != NULL, "invariant");
3367 assert(parsed_annotations != NULL, "invariant");
3368
3369 // Set inner classes attribute to default sentinel
3370 _inner_classes = Universe::the_empty_short_array();
3371 // Set nest members attribute to default sentinel
3372 _nest_members = Universe::the_empty_short_array();
3373 cfs->guarantee_more(2, CHECK); // attributes_count
3374 u2 attributes_count = cfs->get_u2_fast();
3375 bool parsed_sourcefile_attribute = false;
3376 bool parsed_innerclasses_attribute = false;
3377 bool parsed_nest_members_attribute = false;
3378 bool parsed_nest_host_attribute = false;
3379 bool parsed_enclosingmethod_attribute = false;
3380 bool parsed_bootstrap_methods_attribute = false;
3381 const u1* runtime_visible_annotations = NULL;
3382 int runtime_visible_annotations_length = 0;
3383 const u1* runtime_invisible_annotations = NULL;
3384 int runtime_invisible_annotations_length = 0;
3385 const u1* runtime_visible_type_annotations = NULL;
3386 int runtime_visible_type_annotations_length = 0;
3387 const u1* runtime_invisible_type_annotations = NULL;
3388 int runtime_invisible_type_annotations_length = 0;
3389 bool runtime_invisible_type_annotations_exists = false;
3390 bool runtime_invisible_annotations_exists = false;
3391 bool parsed_source_debug_ext_annotations_exist = false;
3392 const u1* inner_classes_attribute_start = NULL;
3393 u4 inner_classes_attribute_length = 0;
3394 u2 enclosing_method_class_index = 0;
3395 u2 enclosing_method_method_index = 0;
3396 const u1* nest_members_attribute_start = NULL;
3397 u4 nest_members_attribute_length = 0;
3398
3399 // Iterate over attributes
3400 while (attributes_count--) {
3401 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3402 const u2 attribute_name_index = cfs->get_u2_fast();
3403 const u4 attribute_length = cfs->get_u4_fast();
3404 check_property(
3405 valid_symbol_at(attribute_name_index),
3406 "Attribute name has bad constant pool index %u in class file %s",
3407 attribute_name_index, CHECK);
3408 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3409 if (tag == vmSymbols::tag_source_file()) {
3410 // Check for SourceFile tag
3411 if (_need_verify) {
3412 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3413 }
3414 if (parsed_sourcefile_attribute) {
3415 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3416 } else {
3417 parsed_sourcefile_attribute = true;
3418 }
3419 parse_classfile_sourcefile_attribute(cfs, CHECK);
3420 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3421 // Check for SourceDebugExtension tag
3422 if (parsed_source_debug_ext_annotations_exist) {
3423 classfile_parse_error(
3424 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3425 }
3426 parsed_source_debug_ext_annotations_exist = true;
3427 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3428 } else if (tag == vmSymbols::tag_inner_classes()) {
3429 // Check for InnerClasses tag
3430 if (parsed_innerclasses_attribute) {
3431 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3432 } else {
3433 parsed_innerclasses_attribute = true;
3434 }
3435 inner_classes_attribute_start = cfs->current();
3436 inner_classes_attribute_length = attribute_length;
3437 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3438 } else if (tag == vmSymbols::tag_synthetic()) {
3439 // Check for Synthetic tag
3440 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3441 if (attribute_length != 0) {
3442 classfile_parse_error(
3443 "Invalid Synthetic classfile attribute length %u in class file %s",
3444 attribute_length, CHECK);
3445 }
3446 parse_classfile_synthetic_attribute(CHECK);
3447 } else if (tag == vmSymbols::tag_deprecated()) {
3448 // Check for Deprecatd tag - 4276120
3449 if (attribute_length != 0) {
3450 classfile_parse_error(
3451 "Invalid Deprecated classfile attribute length %u in class file %s",
3452 attribute_length, CHECK);
3453 }
3454 } else if (_major_version >= JAVA_1_5_VERSION) {
3455 if (tag == vmSymbols::tag_signature()) {
3456 if (_generic_signature_index != 0) {
3457 classfile_parse_error(
3458 "Multiple Signature attributes in class file %s", CHECK);
3459 }
3460 if (attribute_length != 2) {
3461 classfile_parse_error(
3462 "Wrong Signature attribute length %u in class file %s",
3463 attribute_length, CHECK);
3464 }
3465 parse_classfile_signature_attribute(cfs, CHECK);
3466 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3467 if (runtime_visible_annotations != NULL) {
3468 classfile_parse_error(
3469 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3470 }
3471 runtime_visible_annotations_length = attribute_length;
3472 runtime_visible_annotations = cfs->current();
3473 assert(runtime_visible_annotations != NULL, "null visible annotations");
3474 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3475 parse_annotations(cp,
3476 runtime_visible_annotations,
3477 runtime_visible_annotations_length,
3478 parsed_annotations,
3479 _loader_data,
3480 _can_access_vm_annotations,
3481 CHECK);
3482 cfs->skip_u1_fast(runtime_visible_annotations_length);
3483 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3484 if (runtime_invisible_annotations_exists) {
3485 classfile_parse_error(
3486 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3487 }
3488 runtime_invisible_annotations_exists = true;
3489 if (PreserveAllAnnotations) {
3490 runtime_invisible_annotations_length = attribute_length;
3491 runtime_invisible_annotations = cfs->current();
3492 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3493 }
3494 cfs->skip_u1(attribute_length, CHECK);
3495 } else if (tag == vmSymbols::tag_enclosing_method()) {
3496 if (parsed_enclosingmethod_attribute) {
3497 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3498 } else {
3499 parsed_enclosingmethod_attribute = true;
3500 }
3501 guarantee_property(attribute_length == 4,
3502 "Wrong EnclosingMethod attribute length %u in class file %s",
3503 attribute_length, CHECK);
3504 cfs->guarantee_more(4, CHECK); // class_index, method_index
3505 enclosing_method_class_index = cfs->get_u2_fast();
3506 enclosing_method_method_index = cfs->get_u2_fast();
3507 if (enclosing_method_class_index == 0) {
3508 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3509 }
3510 // Validate the constant pool indices and types
3511 check_property(valid_klass_reference_at(enclosing_method_class_index),
3512 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3513 if (enclosing_method_method_index != 0 &&
3514 (!cp->is_within_bounds(enclosing_method_method_index) ||
3515 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3516 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3517 }
3518 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3519 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3520 if (parsed_bootstrap_methods_attribute) {
3521 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3522 }
3523 parsed_bootstrap_methods_attribute = true;
3524 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3525 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3526 if (runtime_visible_type_annotations != NULL) {
3527 classfile_parse_error(
3528 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3529 }
3530 runtime_visible_type_annotations_length = attribute_length;
3531 runtime_visible_type_annotations = cfs->current();
3532 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3533 // No need for the VM to parse Type annotations
3534 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3535 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3536 if (runtime_invisible_type_annotations_exists) {
3537 classfile_parse_error(
3538 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3539 } else {
3540 runtime_invisible_type_annotations_exists = true;
3541 }
3542 if (PreserveAllAnnotations) {
3543 runtime_invisible_type_annotations_length = attribute_length;
3544 runtime_invisible_type_annotations = cfs->current();
3545 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3546 }
3547 cfs->skip_u1(attribute_length, CHECK);
3548 } else if (_major_version >= JAVA_11_VERSION) {
3549 if (tag == vmSymbols::tag_nest_members()) {
3550 // Check for NestMembers tag
3551 if (parsed_nest_members_attribute) {
3552 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3553 } else {
3554 parsed_nest_members_attribute = true;
3555 }
3556 if (parsed_nest_host_attribute) {
3557 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3558 }
3559 nest_members_attribute_start = cfs->current();
3560 nest_members_attribute_length = attribute_length;
3561 cfs->skip_u1(nest_members_attribute_length, CHECK);
3562 } else if (tag == vmSymbols::tag_nest_host()) {
3563 if (parsed_nest_host_attribute) {
3564 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3565 } else {
3566 parsed_nest_host_attribute = true;
3567 }
3568 if (parsed_nest_members_attribute) {
3569 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3570 }
3571 if (_need_verify) {
3572 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3573 }
3574 cfs->guarantee_more(2, CHECK);
3575 u2 class_info_index = cfs->get_u2_fast();
3576 check_property(
3577 valid_klass_reference_at(class_info_index),
3578 "Nest-host class_info_index %u has bad constant type in class file %s",
3579 class_info_index, CHECK);
3580 _nest_host = class_info_index;
3581 } else {
3582 // Unknown attribute
3583 cfs->skip_u1(attribute_length, CHECK);
3584 }
3585 } else {
3586 // Unknown attribute
3587 cfs->skip_u1(attribute_length, CHECK);
3588 }
3589 } else {
3590 // Unknown attribute
3591 cfs->skip_u1(attribute_length, CHECK);
3592 }
3593 }
3594 _annotations = assemble_annotations(runtime_visible_annotations,
3595 runtime_visible_annotations_length,
3596 runtime_invisible_annotations,
3597 runtime_invisible_annotations_length,
3598 CHECK);
3599 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3600 runtime_visible_type_annotations_length,
3601 runtime_invisible_type_annotations,
3602 runtime_invisible_type_annotations_length,
3603 CHECK);
3604
3605 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3606 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3607 cfs,
3608 inner_classes_attribute_start,
3609 parsed_innerclasses_attribute,
3610 enclosing_method_class_index,
3611 enclosing_method_method_index,
3612 CHECK);
3613 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3614 guarantee_property(
3615 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3616 "Wrong InnerClasses attribute length in class file %s", CHECK);
3617 }
3618 }
3619
3620 if (parsed_nest_members_attribute) {
3621 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3622 cfs,
3623 nest_members_attribute_start,
3624 CHECK);
3625 if (_need_verify) {
3626 guarantee_property(
3627 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3628 "Wrong NestMembers attribute length in class file %s", CHECK);
3629 }
3630 }
3631
3632 if (_max_bootstrap_specifier_index >= 0) {
3633 guarantee_property(parsed_bootstrap_methods_attribute,
3634 "Missing BootstrapMethods attribute in class file %s", CHECK);
3635 }
3636 }
3637
3638 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3639 assert(k != NULL, "invariant");
3640
3641 if (_synthetic_flag)
3642 k->set_is_synthetic();
3643 if (_sourcefile_index != 0) {
3644 k->set_source_file_name_index(_sourcefile_index);
3645 }
3646 if (_generic_signature_index != 0) {
3647 k->set_generic_signature_index(_generic_signature_index);
3648 }
3649 if (_sde_buffer != NULL) {
3650 k->set_source_debug_extension(_sde_buffer, _sde_length);
3651 }
3652 }
3653
3654 // Create the Annotations object that will
3655 // hold the annotations array for the Klass.
3656 void ClassFileParser::create_combined_annotations(TRAPS) {
3657 if (_annotations == NULL &&
3658 _type_annotations == NULL &&
3659 _fields_annotations == NULL &&
3660 _fields_type_annotations == NULL) {
3661 // Don't create the Annotations object unnecessarily.
3662 return;
3663 }
3664
3665 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3666 annotations->set_class_annotations(_annotations);
3667 annotations->set_class_type_annotations(_type_annotations);
3668 annotations->set_fields_annotations(_fields_annotations);
3669 annotations->set_fields_type_annotations(_fields_type_annotations);
3670
3671 // This is the Annotations object that will be
3672 // assigned to InstanceKlass being constructed.
3673 _combined_annotations = annotations;
3674
3675 // The annotations arrays below has been transfered the
3676 // _combined_annotations so these fields can now be cleared.
3677 _annotations = NULL;
3678 _type_annotations = NULL;
3679 _fields_annotations = NULL;
3680 _fields_type_annotations = NULL;
3681 }
3682
3683 // Transfer ownership of metadata allocated to the InstanceKlass.
3684 void ClassFileParser::apply_parsed_class_metadata(
3685 InstanceKlass* this_klass,
3686 int java_fields_count, TRAPS) {
3687 assert(this_klass != NULL, "invariant");
3688
3689 _cp->set_pool_holder(this_klass);
3690 this_klass->set_constants(_cp);
3691 this_klass->set_fields(_fields, java_fields_count);
3692 this_klass->set_methods(_methods);
3693 this_klass->set_inner_classes(_inner_classes);
3694 this_klass->set_nest_members(_nest_members);
3695 this_klass->set_nest_host_index(_nest_host);
3696 this_klass->set_local_interfaces(_local_interfaces);
3697 this_klass->set_annotations(_combined_annotations);
3698 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3699 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3700 // its _super. If an OOM occurs while loading the current klass, its _super field
3701 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3702 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3703 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3704
3705 // Clear out these fields so they don't get deallocated by the destructor
3706 clear_class_metadata();
3707 }
3708
3709 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3710 int runtime_visible_annotations_length,
3711 const u1* const runtime_invisible_annotations,
3712 int runtime_invisible_annotations_length,
3713 TRAPS) {
3714 AnnotationArray* annotations = NULL;
3715 if (runtime_visible_annotations != NULL ||
3716 runtime_invisible_annotations != NULL) {
3717 annotations = MetadataFactory::new_array<u1>(_loader_data,
3718 runtime_visible_annotations_length +
3719 runtime_invisible_annotations_length,
3720 CHECK_(annotations));
3721 if (runtime_visible_annotations != NULL) {
3722 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3723 annotations->at_put(i, runtime_visible_annotations[i]);
3724 }
3725 }
3726 if (runtime_invisible_annotations != NULL) {
3727 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3728 int append = runtime_visible_annotations_length+i;
3729 annotations->at_put(append, runtime_invisible_annotations[i]);
3730 }
3731 }
3732 }
3733 return annotations;
3734 }
3735
3736 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3737 const int super_class_index,
3738 const bool need_verify,
3739 TRAPS) {
3740 assert(cp != NULL, "invariant");
3741 const InstanceKlass* super_klass = NULL;
3742
3743 if (super_class_index == 0) {
3744 check_property(_class_name == vmSymbols::java_lang_Object(),
3745 "Invalid superclass index %u in class file %s",
3746 super_class_index,
3747 CHECK_NULL);
3748 } else {
3749 check_property(valid_klass_reference_at(super_class_index),
3750 "Invalid superclass index %u in class file %s",
3751 super_class_index,
3752 CHECK_NULL);
3753 // The class name should be legal because it is checked when parsing constant pool.
3754 // However, make sure it is not an array type.
3755 bool is_array = false;
3756 if (cp->tag_at(super_class_index).is_klass()) {
3757 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3758 if (need_verify)
3759 is_array = super_klass->is_array_klass();
3760 } else if (need_verify) {
3761 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3762 }
3763 if (need_verify) {
3764 guarantee_property(!is_array,
3765 "Bad superclass name in class file %s", CHECK_NULL);
3766 }
3767 }
3768 return super_klass;
3769 }
3770
3771 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3772 unsigned int nonstatic_oop_map_count,
3773 int first_nonstatic_oop_offset) {
3774
3775 unsigned int map_count =
3776 NULL == super ? 0 : super->nonstatic_oop_map_count();
3777 if (nonstatic_oop_map_count > 0) {
3778 // We have oops to add to map
3779 if (map_count == 0) {
3780 map_count = nonstatic_oop_map_count;
3781 }
3782 else {
3783 // Check whether we should add a new map block or whether the last one can
3784 // be extended
3785 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3786 const OopMapBlock* const last_map = first_map + map_count - 1;
3787
3788 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3789 if (next_offset == first_nonstatic_oop_offset) {
3790 // There is no gap bettwen superklass's last oop field and first
3791 // local oop field, merge maps.
3792 nonstatic_oop_map_count -= 1;
3793 }
3794 else {
3795 // Superklass didn't end with a oop field, add extra maps
3796 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3797 }
3798 map_count += nonstatic_oop_map_count;
3799 }
3800 }
3801 return map_count;
3802 }
3803
3804 #ifndef PRODUCT
3805 static void print_field_layout(const Symbol* name,
3806 Array<u2>* fields,
3807 const constantPoolHandle& cp,
3808 int instance_size,
3809 int instance_fields_start,
3810 int instance_fields_end,
3811 int static_fields_end) {
3812
3813 assert(name != NULL, "invariant");
3814
3815 tty->print("%s: field layout\n", name->as_klass_external_name());
3816 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3817 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3818 if (!fs.access_flags().is_static()) {
3819 tty->print(" @%3d \"%s\" %s\n",
3820 fs.offset(),
3821 fs.name()->as_klass_external_name(),
3822 fs.signature()->as_klass_external_name());
3823 }
3824 }
3825 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3826 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3827 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3828 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3829 if (fs.access_flags().is_static()) {
3830 tty->print(" @%3d \"%s\" %s\n",
3831 fs.offset(),
3832 fs.name()->as_klass_external_name(),
3833 fs.signature()->as_klass_external_name());
3834 }
3835 }
3836 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3837 tty->print("\n");
3838 }
3839 #endif
3840
3841 // Values needed for oopmap and InstanceKlass creation
3842 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3843 public:
3844 int* nonstatic_oop_offsets;
3845 unsigned int* nonstatic_oop_counts;
3846 unsigned int nonstatic_oop_map_count;
3847 unsigned int total_oop_map_count;
3848 int instance_size;
3849 int nonstatic_field_size;
3850 int static_field_size;
3851 bool has_nonstatic_fields;
3852 };
3853
3854 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3855 void ClassFileParser::layout_fields(ConstantPool* cp,
3856 const FieldAllocationCount* fac,
3857 const ClassAnnotationCollector* parsed_annotations,
3858 FieldLayoutInfo* info,
3859 TRAPS) {
3860
3861 assert(cp != NULL, "invariant");
3862
3863 // Field size and offset computation
3864 int nonstatic_field_size = _super_klass == NULL ? 0 :
3865 _super_klass->nonstatic_field_size();
3866
3867 // Count the contended fields by type.
3868 //
3869 // We ignore static fields, because @Contended is not supported for them.
3870 // The layout code below will also ignore the static fields.
3871 int nonstatic_contended_count = 0;
3872 FieldAllocationCount fac_contended;
3873 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3874 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3875 if (fs.is_contended()) {
3876 fac_contended.count[atype]++;
3877 if (!fs.access_flags().is_static()) {
3878 nonstatic_contended_count++;
3879 }
3880 }
3881 }
3882
3883
3884 // Calculate the starting byte offsets
3885 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3886 int next_static_double_offset = next_static_oop_offset +
3887 ((fac->count[STATIC_OOP]) * heapOopSize);
3888 if (fac->count[STATIC_DOUBLE]) {
3889 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3890 }
3891
3892 int next_static_word_offset = next_static_double_offset +
3893 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3894 int next_static_short_offset = next_static_word_offset +
3895 ((fac->count[STATIC_WORD]) * BytesPerInt);
3896 int next_static_byte_offset = next_static_short_offset +
3897 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3898
3899 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3900 nonstatic_field_size * heapOopSize;
3901
3902 int next_nonstatic_field_offset = nonstatic_fields_start;
3903
3904 const bool is_contended_class = parsed_annotations->is_contended();
3905
3906 // Class is contended, pad before all the fields
3907 if (is_contended_class) {
3908 next_nonstatic_field_offset += ContendedPaddingWidth;
3909 }
3910
3911 // Compute the non-contended fields count.
3912 // The packing code below relies on these counts to determine if some field
3913 // can be squeezed into the alignment gap. Contended fields are obviously
3914 // exempt from that.
3915 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3916 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3917 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3918 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3919 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3920
3921 // Total non-static fields count, including every contended field
3922 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3923 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3924 fac->count[NONSTATIC_OOP];
3925
3926 const bool super_has_nonstatic_fields =
3927 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3928 const bool has_nonstatic_fields =
3929 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3930
3931
3932 // Prepare list of oops for oop map generation.
3933 //
3934 // "offset" and "count" lists are describing the set of contiguous oop
3935 // regions. offset[i] is the start of the i-th region, which then has
3936 // count[i] oops following. Before we know how many regions are required,
3937 // we pessimistically allocate the maps to fit all the oops into the
3938 // distinct regions.
3939 //
3940 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3941 // to figure out if we still need to do this.
3942 unsigned int nonstatic_oop_map_count = 0;
3943 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3944
3945 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3946 THREAD, int, max_nonstatic_oop_maps);
3947 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3948 THREAD, unsigned int, max_nonstatic_oop_maps);
3949
3950 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3951
3952 bool compact_fields = CompactFields;
3953 int allocation_style = FieldsAllocationStyle;
3954 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3955 assert(false, "0 <= FieldsAllocationStyle <= 2");
3956 allocation_style = 1; // Optimistic
3957 }
3958
3959 // The next classes have predefined hard-coded fields offsets
3960 // (see in JavaClasses::compute_hard_coded_offsets()).
3961 // Use default fields allocation order for them.
3962 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3963 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3964 _class_name == vmSymbols::java_lang_Class() ||
3965 _class_name == vmSymbols::java_lang_ClassLoader() ||
3966 _class_name == vmSymbols::java_lang_ref_Reference() ||
3967 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3968 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3969 _class_name == vmSymbols::java_lang_String() ||
3970 _class_name == vmSymbols::java_lang_Throwable() ||
3971 _class_name == vmSymbols::java_lang_Boolean() ||
3972 _class_name == vmSymbols::java_lang_Character() ||
3973 _class_name == vmSymbols::java_lang_Float() ||
3974 _class_name == vmSymbols::java_lang_Double() ||
3975 _class_name == vmSymbols::java_lang_Byte() ||
3976 _class_name == vmSymbols::java_lang_Short() ||
3977 _class_name == vmSymbols::java_lang_Integer() ||
3978 _class_name == vmSymbols::java_lang_Long())) {
3979 allocation_style = 0; // Allocate oops first
3980 compact_fields = false; // Don't compact fields
3981 }
3982
3983 int next_nonstatic_oop_offset = 0;
3984 int next_nonstatic_double_offset = 0;
3985
3986 // Rearrange fields for a given allocation style
3987 if( allocation_style == 0 ) {
3988 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3989 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3990 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3991 (nonstatic_oop_count * heapOopSize);
3992 } else if( allocation_style == 1 ) {
3993 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3994 next_nonstatic_double_offset = next_nonstatic_field_offset;
3995 } else if( allocation_style == 2 ) {
3996 // Fields allocation: oops fields in super and sub classes are together.
3997 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3998 _super_klass->nonstatic_oop_map_size() > 0 ) {
3999 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
4000 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
4001 const OopMapBlock* const last_map = first_map + map_count - 1;
4002 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
4003 if (next_offset == next_nonstatic_field_offset) {
4004 allocation_style = 0; // allocate oops first
4005 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4006 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4007 (nonstatic_oop_count * heapOopSize);
4008 }
4009 }
4010 if( allocation_style == 2 ) {
4011 allocation_style = 1; // allocate oops last
4012 next_nonstatic_double_offset = next_nonstatic_field_offset;
4013 }
4014 } else {
4015 ShouldNotReachHere();
4016 }
4017
4018 int nonstatic_oop_space_count = 0;
4019 int nonstatic_word_space_count = 0;
4020 int nonstatic_short_space_count = 0;
4021 int nonstatic_byte_space_count = 0;
4022 int nonstatic_oop_space_offset = 0;
4023 int nonstatic_word_space_offset = 0;
4024 int nonstatic_short_space_offset = 0;
4025 int nonstatic_byte_space_offset = 0;
4026
4027 // Try to squeeze some of the fields into the gaps due to
4028 // long/double alignment.
4029 if (nonstatic_double_count > 0) {
4030 int offset = next_nonstatic_double_offset;
4031 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4032 if (compact_fields && offset != next_nonstatic_double_offset) {
4033 // Allocate available fields into the gap before double field.
4034 int length = next_nonstatic_double_offset - offset;
4035 assert(length == BytesPerInt, "");
4036 nonstatic_word_space_offset = offset;
4037 if (nonstatic_word_count > 0) {
4038 nonstatic_word_count -= 1;
4039 nonstatic_word_space_count = 1; // Only one will fit
4040 length -= BytesPerInt;
4041 offset += BytesPerInt;
4042 }
4043 nonstatic_short_space_offset = offset;
4044 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4045 nonstatic_short_count -= 1;
4046 nonstatic_short_space_count += 1;
4047 length -= BytesPerShort;
4048 offset += BytesPerShort;
4049 }
4050 nonstatic_byte_space_offset = offset;
4051 while (length > 0 && nonstatic_byte_count > 0) {
4052 nonstatic_byte_count -= 1;
4053 nonstatic_byte_space_count += 1;
4054 length -= 1;
4055 }
4056 // Allocate oop field in the gap if there are no other fields for that.
4057 nonstatic_oop_space_offset = offset;
4058 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4059 allocation_style != 0) { // when oop fields not first
4060 nonstatic_oop_count -= 1;
4061 nonstatic_oop_space_count = 1; // Only one will fit
4062 length -= heapOopSize;
4063 offset += heapOopSize;
4064 }
4065 }
4066 }
4067
4068 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4069 (nonstatic_double_count * BytesPerLong);
4070 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4071 (nonstatic_word_count * BytesPerInt);
4072 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4073 (nonstatic_short_count * BytesPerShort);
4074 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4075 nonstatic_byte_count;
4076
4077 // let oops jump before padding with this allocation style
4078 if( allocation_style == 1 ) {
4079 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4080 if( nonstatic_oop_count > 0 ) {
4081 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4082 }
4083 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4084 }
4085
4086 // Iterate over fields again and compute correct offsets.
4087 // The field allocation type was temporarily stored in the offset slot.
4088 // oop fields are located before non-oop fields (static and non-static).
4089 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4090
4091 // skip already laid out fields
4092 if (fs.is_offset_set()) continue;
4093
4094 // contended instance fields are handled below
4095 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4096
4097 int real_offset = 0;
4098 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4099
4100 // pack the rest of the fields
4101 switch (atype) {
4102 case STATIC_OOP:
4103 real_offset = next_static_oop_offset;
4104 next_static_oop_offset += heapOopSize;
4105 break;
4106 case STATIC_BYTE:
4107 real_offset = next_static_byte_offset;
4108 next_static_byte_offset += 1;
4109 break;
4110 case STATIC_SHORT:
4111 real_offset = next_static_short_offset;
4112 next_static_short_offset += BytesPerShort;
4113 break;
4114 case STATIC_WORD:
4115 real_offset = next_static_word_offset;
4116 next_static_word_offset += BytesPerInt;
4117 break;
4118 case STATIC_DOUBLE:
4119 real_offset = next_static_double_offset;
4120 next_static_double_offset += BytesPerLong;
4121 break;
4122 case NONSTATIC_OOP:
4123 if( nonstatic_oop_space_count > 0 ) {
4124 real_offset = nonstatic_oop_space_offset;
4125 nonstatic_oop_space_offset += heapOopSize;
4126 nonstatic_oop_space_count -= 1;
4127 } else {
4128 real_offset = next_nonstatic_oop_offset;
4129 next_nonstatic_oop_offset += heapOopSize;
4130 }
4131
4132 // Record this oop in the oop maps
4133 if( nonstatic_oop_map_count > 0 &&
4134 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4135 real_offset -
4136 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4137 heapOopSize ) {
4138 // This oop is adjacent to the previous one, add to current oop map
4139 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4140 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4141 } else {
4142 // This oop is not adjacent to the previous one, create new oop map
4143 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4144 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4145 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4146 nonstatic_oop_map_count += 1;
4147 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4148 first_nonstatic_oop_offset = real_offset;
4149 }
4150 }
4151 break;
4152 case NONSTATIC_BYTE:
4153 if( nonstatic_byte_space_count > 0 ) {
4154 real_offset = nonstatic_byte_space_offset;
4155 nonstatic_byte_space_offset += 1;
4156 nonstatic_byte_space_count -= 1;
4157 } else {
4158 real_offset = next_nonstatic_byte_offset;
4159 next_nonstatic_byte_offset += 1;
4160 }
4161 break;
4162 case NONSTATIC_SHORT:
4163 if( nonstatic_short_space_count > 0 ) {
4164 real_offset = nonstatic_short_space_offset;
4165 nonstatic_short_space_offset += BytesPerShort;
4166 nonstatic_short_space_count -= 1;
4167 } else {
4168 real_offset = next_nonstatic_short_offset;
4169 next_nonstatic_short_offset += BytesPerShort;
4170 }
4171 break;
4172 case NONSTATIC_WORD:
4173 if( nonstatic_word_space_count > 0 ) {
4174 real_offset = nonstatic_word_space_offset;
4175 nonstatic_word_space_offset += BytesPerInt;
4176 nonstatic_word_space_count -= 1;
4177 } else {
4178 real_offset = next_nonstatic_word_offset;
4179 next_nonstatic_word_offset += BytesPerInt;
4180 }
4181 break;
4182 case NONSTATIC_DOUBLE:
4183 real_offset = next_nonstatic_double_offset;
4184 next_nonstatic_double_offset += BytesPerLong;
4185 break;
4186 default:
4187 ShouldNotReachHere();
4188 }
4189 fs.set_offset(real_offset);
4190 }
4191
4192
4193 // Handle the contended cases.
4194 //
4195 // Each contended field should not intersect the cache line with another contended field.
4196 // In the absence of alignment information, we end up with pessimistically separating
4197 // the fields with full-width padding.
4198 //
4199 // Additionally, this should not break alignment for the fields, so we round the alignment up
4200 // for each field.
4201 if (nonstatic_contended_count > 0) {
4202
4203 // if there is at least one contended field, we need to have pre-padding for them
4204 next_nonstatic_padded_offset += ContendedPaddingWidth;
4205
4206 // collect all contended groups
4207 ResourceBitMap bm(cp->size());
4208 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4209 // skip already laid out fields
4210 if (fs.is_offset_set()) continue;
4211
4212 if (fs.is_contended()) {
4213 bm.set_bit(fs.contended_group());
4214 }
4215 }
4216
4217 int current_group = -1;
4218 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4219
4220 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4221
4222 // skip already laid out fields
4223 if (fs.is_offset_set()) continue;
4224
4225 // skip non-contended fields and fields from different group
4226 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4227
4228 // handle statics below
4229 if (fs.access_flags().is_static()) continue;
4230
4231 int real_offset = 0;
4232 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4233
4234 switch (atype) {
4235 case NONSTATIC_BYTE:
4236 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4237 real_offset = next_nonstatic_padded_offset;
4238 next_nonstatic_padded_offset += 1;
4239 break;
4240
4241 case NONSTATIC_SHORT:
4242 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4243 real_offset = next_nonstatic_padded_offset;
4244 next_nonstatic_padded_offset += BytesPerShort;
4245 break;
4246
4247 case NONSTATIC_WORD:
4248 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4249 real_offset = next_nonstatic_padded_offset;
4250 next_nonstatic_padded_offset += BytesPerInt;
4251 break;
4252
4253 case NONSTATIC_DOUBLE:
4254 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4255 real_offset = next_nonstatic_padded_offset;
4256 next_nonstatic_padded_offset += BytesPerLong;
4257 break;
4258
4259 case NONSTATIC_OOP:
4260 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4261 real_offset = next_nonstatic_padded_offset;
4262 next_nonstatic_padded_offset += heapOopSize;
4263
4264 // Record this oop in the oop maps
4265 if( nonstatic_oop_map_count > 0 &&
4266 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4267 real_offset -
4268 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4269 heapOopSize ) {
4270 // This oop is adjacent to the previous one, add to current oop map
4271 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4272 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4273 } else {
4274 // This oop is not adjacent to the previous one, create new oop map
4275 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4276 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4277 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4278 nonstatic_oop_map_count += 1;
4279 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4280 first_nonstatic_oop_offset = real_offset;
4281 }
4282 }
4283 break;
4284
4285 default:
4286 ShouldNotReachHere();
4287 }
4288
4289 if (fs.contended_group() == 0) {
4290 // Contended group defines the equivalence class over the fields:
4291 // the fields within the same contended group are not inter-padded.
4292 // The only exception is default group, which does not incur the
4293 // equivalence, and so requires intra-padding.
4294 next_nonstatic_padded_offset += ContendedPaddingWidth;
4295 }
4296
4297 fs.set_offset(real_offset);
4298 } // for
4299
4300 // Start laying out the next group.
4301 // Note that this will effectively pad the last group in the back;
4302 // this is expected to alleviate memory contention effects for
4303 // subclass fields and/or adjacent object.
4304 // If this was the default group, the padding is already in place.
4305 if (current_group != 0) {
4306 next_nonstatic_padded_offset += ContendedPaddingWidth;
4307 }
4308 }
4309
4310 // handle static fields
4311 }
4312
4313 // Entire class is contended, pad in the back.
4314 // This helps to alleviate memory contention effects for subclass fields
4315 // and/or adjacent object.
4316 if (is_contended_class) {
4317 next_nonstatic_padded_offset += ContendedPaddingWidth;
4318 }
4319
4320 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4321
4322 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4323 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4324 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4325
4326 int static_field_size = (static_fields_end -
4327 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4328 nonstatic_field_size = nonstatic_field_size +
4329 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4330
4331 int instance_size = align_object_size(instance_end / wordSize);
4332
4333 assert(instance_size == align_object_size(align_up(
4334 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4335 wordSize) / wordSize), "consistent layout helper value");
4336
4337 // Invariant: nonstatic_field end/start should only change if there are
4338 // nonstatic fields in the class, or if the class is contended. We compare
4339 // against the non-aligned value, so that end alignment will not fail the
4340 // assert without actually having the fields.
4341 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4342 is_contended_class ||
4343 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4344
4345 // Number of non-static oop map blocks allocated at end of klass.
4346 const unsigned int total_oop_map_count =
4347 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4348 first_nonstatic_oop_offset);
4349
4350 #ifndef PRODUCT
4351 if (PrintFieldLayout) {
4352 print_field_layout(_class_name,
4353 _fields,
4354 cp,
4355 instance_size,
4356 nonstatic_fields_start,
4357 nonstatic_fields_end,
4358 static_fields_end);
4359 }
4360
4361 #endif
4362 // Pass back information needed for InstanceKlass creation
4363 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4364 info->nonstatic_oop_counts = nonstatic_oop_counts;
4365 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4366 info->total_oop_map_count = total_oop_map_count;
4367 info->instance_size = instance_size;
4368 info->static_field_size = static_field_size;
4369 info->nonstatic_field_size = nonstatic_field_size;
4370 info->has_nonstatic_fields = has_nonstatic_fields;
4371 }
4372
4373 static void fill_oop_maps(const InstanceKlass* k,
4374 unsigned int nonstatic_oop_map_count,
4375 const int* nonstatic_oop_offsets,
4376 const unsigned int* nonstatic_oop_counts) {
4377
4378 assert(k != NULL, "invariant");
4379
4380 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4381 const InstanceKlass* const super = k->superklass();
4382 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4383 if (super_count > 0) {
4384 // Copy maps from superklass
4385 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4386 for (unsigned int i = 0; i < super_count; ++i) {
4387 *this_oop_map++ = *super_oop_map++;
4388 }
4389 }
4390
4391 if (nonstatic_oop_map_count > 0) {
4392 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4393 // The counts differ because there is no gap between superklass's last oop
4394 // field and the first local oop field. Extend the last oop map copied
4395 // from the superklass instead of creating new one.
4396 nonstatic_oop_map_count--;
4397 nonstatic_oop_offsets++;
4398 this_oop_map--;
4399 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4400 this_oop_map++;
4401 }
4402
4403 // Add new map blocks, fill them
4404 while (nonstatic_oop_map_count-- > 0) {
4405 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4406 this_oop_map->set_count(*nonstatic_oop_counts++);
4407 this_oop_map++;
4408 }
4409 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4410 this_oop_map, "sanity");
4411 }
4412 }
4413
4414
4415 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4416 assert(ik != NULL, "invariant");
4417
4418 const Klass* const super = ik->super();
4419
4420 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4421 // in which case we don't have to register objects as finalizable
4422 if (!_has_empty_finalizer) {
4423 if (_has_finalizer ||
4424 (super != NULL && super->has_finalizer())) {
4425 ik->set_has_finalizer();
4426 }
4427 }
4428
4429 #ifdef ASSERT
4430 bool f = false;
4431 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4432 vmSymbols::void_method_signature());
4433 if (m != NULL && !m->is_empty_method()) {
4434 f = true;
4435 }
4436
4437 // Spec doesn't prevent agent from redefinition of empty finalizer.
4438 // Despite the fact that it's generally bad idea and redefined finalizer
4439 // will not work as expected we shouldn't abort vm in this case
4440 if (!ik->has_redefined_this_or_super()) {
4441 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4442 }
4443 #endif
4444
4445 // Check if this klass supports the java.lang.Cloneable interface
4446 if (SystemDictionary::Cloneable_klass_loaded()) {
4447 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4448 ik->set_is_cloneable();
4449 }
4450 }
4451
4452 // Check if this klass has a vanilla default constructor
4453 if (super == NULL) {
4454 // java.lang.Object has empty default constructor
4455 ik->set_has_vanilla_constructor();
4456 } else {
4457 if (super->has_vanilla_constructor() &&
4458 _has_vanilla_constructor) {
4459 ik->set_has_vanilla_constructor();
4460 }
4461 #ifdef ASSERT
4462 bool v = false;
4463 if (super->has_vanilla_constructor()) {
4464 const Method* const constructor =
4465 ik->find_method(vmSymbols::object_initializer_name(),
4466 vmSymbols::void_method_signature());
4467 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4468 v = true;
4469 }
4470 }
4471 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4472 #endif
4473 }
4474
4475 // If it cannot be fast-path allocated, set a bit in the layout helper.
4476 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4477 assert(ik->size_helper() > 0, "layout_helper is initialized");
4478 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4479 || ik->is_abstract() || ik->is_interface()
4480 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4481 || ik->size_helper() >= FastAllocateSizeLimit) {
4482 // Forbid fast-path allocation.
4483 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4484 ik->set_layout_helper(lh);
4485 }
4486 }
4487
4488 // Attach super classes and interface classes to class loader data
4489 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4490 TRAPS) {
4491 assert(defined_klass != NULL, "invariant");
4492
4493 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4494 if (defining_loader_data->is_the_null_class_loader_data()) {
4495 // Dependencies to null class loader data are implicit.
4496 return;
4497 } else {
4498 // add super class dependency
4499 Klass* const super = defined_klass->super();
4500 if (super != NULL) {
4501 defining_loader_data->record_dependency(super);
4502 }
4503
4504 // add super interface dependencies
4505 const Array<InstanceKlass*>* const local_interfaces = defined_klass->local_interfaces();
4506 if (local_interfaces != NULL) {
4507 const int length = local_interfaces->length();
4508 for (int i = 0; i < length; i++) {
4509 defining_loader_data->record_dependency(local_interfaces->at(i));
4510 }
4511 }
4512 }
4513 }
4514
4515 // utility methods for appending an array with check for duplicates
4516
4517 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4518 const Array<InstanceKlass*>* const ifs) {
4519 // iterate over new interfaces
4520 for (int i = 0; i < ifs->length(); i++) {
4521 InstanceKlass* const e = ifs->at(i);
4522 assert(e->is_klass() && e->is_interface(), "just checking");
4523 // add new interface
4524 result->append_if_missing(e);
4525 }
4526 }
4527
4528 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4529 Array<InstanceKlass*>* local_ifs,
4530 ClassLoaderData* loader_data,
4531 TRAPS) {
4532 assert(local_ifs != NULL, "invariant");
4533 assert(loader_data != NULL, "invariant");
4534
4535 // Compute maximum size for transitive interfaces
4536 int max_transitive_size = 0;
4537 int super_size = 0;
4538 // Add superclass transitive interfaces size
4539 if (super != NULL) {
4540 super_size = super->transitive_interfaces()->length();
4541 max_transitive_size += super_size;
4542 }
4543 // Add local interfaces' super interfaces
4544 const int local_size = local_ifs->length();
4545 for (int i = 0; i < local_size; i++) {
4546 InstanceKlass* const l = local_ifs->at(i);
4547 max_transitive_size += l->transitive_interfaces()->length();
4548 }
4549 // Finally add local interfaces
4550 max_transitive_size += local_size;
4551 // Construct array
4552 if (max_transitive_size == 0) {
4553 // no interfaces, use canonicalized array
4554 return Universe::the_empty_instance_klass_array();
4555 } else if (max_transitive_size == super_size) {
4556 // no new local interfaces added, share superklass' transitive interface array
4557 return super->transitive_interfaces();
4558 } else if (max_transitive_size == local_size) {
4559 // only local interfaces added, share local interface array
4560 return local_ifs;
4561 } else {
4562 ResourceMark rm;
4563 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4564
4565 // Copy down from superclass
4566 if (super != NULL) {
4567 append_interfaces(result, super->transitive_interfaces());
4568 }
4569
4570 // Copy down from local interfaces' superinterfaces
4571 for (int i = 0; i < local_size; i++) {
4572 InstanceKlass* const l = local_ifs->at(i);
4573 append_interfaces(result, l->transitive_interfaces());
4574 }
4575 // Finally add local interfaces
4576 append_interfaces(result, local_ifs);
4577
4578 // length will be less than the max_transitive_size if duplicates were removed
4579 const int length = result->length();
4580 assert(length <= max_transitive_size, "just checking");
4581 Array<InstanceKlass*>* const new_result =
4582 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4583 for (int i = 0; i < length; i++) {
4584 InstanceKlass* const e = result->at(i);
4585 assert(e != NULL, "just checking");
4586 new_result->at_put(i, e);
4587 }
4588 return new_result;
4589 }
4590 }
4591
4592 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4593 assert(this_klass != NULL, "invariant");
4594 const Klass* const super = this_klass->super();
4595 if (super != NULL) {
4596
4597 // If the loader is not the boot loader then throw an exception if its
4598 // superclass is in package jdk.internal.reflect and its loader is not a
4599 // special reflection class loader
4600 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4601 assert(super->is_instance_klass(), "super is not instance klass");
4602 PackageEntry* super_package = super->package();
4603 if (super_package != NULL &&
4604 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4605 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4606 ResourceMark rm(THREAD);
4607 Exceptions::fthrow(
4608 THREAD_AND_LOCATION,
4609 vmSymbols::java_lang_IllegalAccessError(),
4610 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4611 this_klass->external_name(),
4612 this_klass->class_loader_data()->loader_name_and_id(),
4613 super->external_name());
4614 return;
4615 }
4616 }
4617
4618 Reflection::VerifyClassAccessResults vca_result =
4619 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4620 if (vca_result != Reflection::ACCESS_OK) {
4621 ResourceMark rm(THREAD);
4622 char* msg = Reflection::verify_class_access_msg(this_klass,
4623 InstanceKlass::cast(super),
4624 vca_result);
4625 if (msg == NULL) {
4626 bool same_module = (this_klass->module() == super->module());
4627 Exceptions::fthrow(
4628 THREAD_AND_LOCATION,
4629 vmSymbols::java_lang_IllegalAccessError(),
4630 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4631 this_klass->external_name(),
4632 super->is_abstract() ? "abstract " : "",
4633 super->external_name(),
4634 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4635 (same_module) ? "" : "; ",
4636 (same_module) ? "" : super->class_in_module_of_loader());
4637 } else {
4638 // Add additional message content.
4639 Exceptions::fthrow(
4640 THREAD_AND_LOCATION,
4641 vmSymbols::java_lang_IllegalAccessError(),
4642 "superclass access check failed: %s",
4643 msg);
4644 }
4645 }
4646 }
4647 }
4648
4649
4650 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4651 assert(this_klass != NULL, "invariant");
4652 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4653 const int lng = local_interfaces->length();
4654 for (int i = lng - 1; i >= 0; i--) {
4655 InstanceKlass* const k = local_interfaces->at(i);
4656 assert (k != NULL && k->is_interface(), "invalid interface");
4657 Reflection::VerifyClassAccessResults vca_result =
4658 Reflection::verify_class_access(this_klass, k, false);
4659 if (vca_result != Reflection::ACCESS_OK) {
4660 ResourceMark rm(THREAD);
4661 char* msg = Reflection::verify_class_access_msg(this_klass,
4662 k,
4663 vca_result);
4664 if (msg == NULL) {
4665 bool same_module = (this_klass->module() == k->module());
4666 Exceptions::fthrow(
4667 THREAD_AND_LOCATION,
4668 vmSymbols::java_lang_IllegalAccessError(),
4669 "class %s cannot access its superinterface %s (%s%s%s)",
4670 this_klass->external_name(),
4671 k->external_name(),
4672 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4673 (same_module) ? "" : "; ",
4674 (same_module) ? "" : k->class_in_module_of_loader());
4675 } else {
4676 // Add additional message content.
4677 Exceptions::fthrow(
4678 THREAD_AND_LOCATION,
4679 vmSymbols::java_lang_IllegalAccessError(),
4680 "superinterface check failed: %s",
4681 msg);
4682 }
4683 }
4684 }
4685 }
4686
4687
4688 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4689 assert(this_klass != NULL, "invariant");
4690 const Array<Method*>* const methods = this_klass->methods();
4691 const int num_methods = methods->length();
4692
4693 // go thru each method and check if it overrides a final method
4694 for (int index = 0; index < num_methods; index++) {
4695 const Method* const m = methods->at(index);
4696
4697 // skip private, static, and <init> methods
4698 if ((!m->is_private() && !m->is_static()) &&
4699 (m->name() != vmSymbols::object_initializer_name())) {
4700
4701 const Symbol* const name = m->name();
4702 const Symbol* const signature = m->signature();
4703 const Klass* k = this_klass->super();
4704 const Method* super_m = NULL;
4705 while (k != NULL) {
4706 // skip supers that don't have final methods.
4707 if (k->has_final_method()) {
4708 // lookup a matching method in the super class hierarchy
4709 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4710 if (super_m == NULL) {
4711 break; // didn't find any match; get out
4712 }
4713
4714 if (super_m->is_final() && !super_m->is_static() &&
4715 !super_m->access_flags().is_private()) {
4716 // matching method in super is final, and not static or private
4717 bool can_access = Reflection::verify_member_access(this_klass,
4718 super_m->method_holder(),
4719 super_m->method_holder(),
4720 super_m->access_flags(),
4721 false, false, CHECK);
4722 if (can_access) {
4723 // this class can access super final method and therefore override
4724 ResourceMark rm(THREAD);
4725 Exceptions::fthrow(THREAD_AND_LOCATION,
4726 vmSymbols::java_lang_VerifyError(),
4727 "class %s overrides final method %s.%s%s",
4728 this_klass->external_name(),
4729 super_m->method_holder()->external_name(),
4730 name->as_C_string(),
4731 signature->as_C_string()
4732 );
4733 return;
4734 }
4735 }
4736
4737 // continue to look from super_m's holder's super.
4738 k = super_m->method_holder()->super();
4739 continue;
4740 }
4741
4742 k = k->super();
4743 }
4744 }
4745 }
4746 }
4747
4748
4749 // assumes that this_klass is an interface
4750 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4751 assert(this_klass != NULL, "invariant");
4752 assert(this_klass->is_interface(), "not an interface");
4753 const Array<Method*>* methods = this_klass->methods();
4754 const int num_methods = methods->length();
4755
4756 for (int index = 0; index < num_methods; index++) {
4757 const Method* const m = methods->at(index);
4758 // if m is static and not the init method, throw a verify error
4759 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4760 ResourceMark rm(THREAD);
4761 Exceptions::fthrow(
4762 THREAD_AND_LOCATION,
4763 vmSymbols::java_lang_VerifyError(),
4764 "Illegal static method %s in interface %s",
4765 m->name()->as_C_string(),
4766 this_klass->external_name()
4767 );
4768 return;
4769 }
4770 }
4771 }
4772
4773 // utility methods for format checking
4774
4775 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4776 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4777 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4778 if (is_module) {
4779 ResourceMark rm(THREAD);
4780 Exceptions::fthrow(
4781 THREAD_AND_LOCATION,
4782 vmSymbols::java_lang_NoClassDefFoundError(),
4783 "%s is not a class because access_flag ACC_MODULE is set",
4784 _class_name->as_C_string());
4785 return;
4786 }
4787
4788 if (!_need_verify) { return; }
4789
4790 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4791 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4792 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4793 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4794 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4795 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4796 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4797
4798 if ((is_abstract && is_final) ||
4799 (is_interface && !is_abstract) ||
4800 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4801 (!is_interface && major_gte_15 && is_annotation)) {
4802 ResourceMark rm(THREAD);
4803 Exceptions::fthrow(
4804 THREAD_AND_LOCATION,
4805 vmSymbols::java_lang_ClassFormatError(),
4806 "Illegal class modifiers in class %s: 0x%X",
4807 _class_name->as_C_string(), flags
4808 );
4809 return;
4810 }
4811 }
4812
4813 static bool has_illegal_visibility(jint flags) {
4814 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4815 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4816 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4817
4818 return ((is_public && is_protected) ||
4819 (is_public && is_private) ||
4820 (is_protected && is_private));
4821 }
4822
4823 // A legal major_version.minor_version must be one of the following:
4824 //
4825 // Major_version = 45, any minor_version.
4826 // Major_version >= 46 and major_version <= current_major_version and minor_version = 0.
4827 // Major_version = current_major_version and minor_version = 65535 and --enable-preview is present.
4828 //
4829 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4830 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4831 if (major != JAVA_MIN_SUPPORTED_VERSION) { // All 45.* are ok including 45.65535
4832 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4833 if (major != max_version) {
4834 ResourceMark rm(THREAD);
4835 Exceptions::fthrow(
4836 THREAD_AND_LOCATION,
4837 vmSymbols::java_lang_UnsupportedClassVersionError(),
4838 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4839 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4840 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4841 return;
4842 }
4843
4844 if (!Arguments::enable_preview()) {
4845 ResourceMark rm(THREAD);
4846 Exceptions::fthrow(
4847 THREAD_AND_LOCATION,
4848 vmSymbols::java_lang_UnsupportedClassVersionError(),
4849 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4850 class_name->as_C_string(), major, minor);
4851 return;
4852 }
4853
4854 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4855 if (major > max_version) {
4856 ResourceMark rm(THREAD);
4857 Exceptions::fthrow(
4858 THREAD_AND_LOCATION,
4859 vmSymbols::java_lang_UnsupportedClassVersionError(),
4860 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4861 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4862 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4863 } else if (major < JAVA_MIN_SUPPORTED_VERSION) {
4864 ResourceMark rm(THREAD);
4865 Exceptions::fthrow(
4866 THREAD_AND_LOCATION,
4867 vmSymbols::java_lang_UnsupportedClassVersionError(),
4868 "%s (class file version %u.%u) was compiled with an invalid major version",
4869 class_name->as_C_string(), major, minor);
4870 } else if (minor != 0) {
4871 ResourceMark rm(THREAD);
4872 Exceptions::fthrow(
4873 THREAD_AND_LOCATION,
4874 vmSymbols::java_lang_UnsupportedClassVersionError(),
4875 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4876 class_name->as_C_string(), major, minor);
4877 }
4878 }
4879 }
4880 }
4881
4882 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4883 bool is_interface,
4884 TRAPS) const {
4885 if (!_need_verify) { return; }
4886
4887 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4888 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4889 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4890 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4891 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4892 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4893 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4894 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4895 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4896
4897 bool is_illegal = false;
4898
4899 if (is_interface) {
4900 if (!is_public || !is_static || !is_final || is_private ||
4901 is_protected || is_volatile || is_transient ||
4902 (major_gte_15 && is_enum)) {
4903 is_illegal = true;
4904 }
4905 } else { // not interface
4906 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4907 is_illegal = true;
4908 }
4909 }
4910
4911 if (is_illegal) {
4912 ResourceMark rm(THREAD);
4913 Exceptions::fthrow(
4914 THREAD_AND_LOCATION,
4915 vmSymbols::java_lang_ClassFormatError(),
4916 "Illegal field modifiers in class %s: 0x%X",
4917 _class_name->as_C_string(), flags);
4918 return;
4919 }
4920 }
4921
4922 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4923 bool is_interface,
4924 const Symbol* name,
4925 TRAPS) const {
4926 if (!_need_verify) { return; }
4927
4928 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4929 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4930 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4931 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4932 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4933 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4934 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4935 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4936 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4937 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4938 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4939 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4940 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4941
4942 bool is_illegal = false;
4943
4944 if (is_interface) {
4945 if (major_gte_8) {
4946 // Class file version is JAVA_8_VERSION or later Methods of
4947 // interfaces may set any of the flags except ACC_PROTECTED,
4948 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4949 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4950 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4951 (is_native || is_protected || is_final || is_synchronized) ||
4952 // If a specific method of a class or interface has its
4953 // ACC_ABSTRACT flag set, it must not have any of its
4954 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4955 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4956 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4957 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4958 (is_abstract && (is_private || is_static || is_strict))) {
4959 is_illegal = true;
4960 }
4961 } else if (major_gte_15) {
4962 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4963 if (!is_public || is_private || is_protected || is_static || is_final ||
4964 is_synchronized || is_native || !is_abstract || is_strict) {
4965 is_illegal = true;
4966 }
4967 } else {
4968 // Class file version is pre-JAVA_1_5_VERSION
4969 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4970 is_illegal = true;
4971 }
4972 }
4973 } else { // not interface
4974 if (has_illegal_visibility(flags)) {
4975 is_illegal = true;
4976 } else {
4977 if (is_initializer) {
4978 if (is_static || is_final || is_synchronized || is_native ||
4979 is_abstract || (major_gte_15 && is_bridge)) {
4980 is_illegal = true;
4981 }
4982 } else { // not initializer
4983 if (is_abstract) {
4984 if ((is_final || is_native || is_private || is_static ||
4985 (major_gte_15 && (is_synchronized || is_strict)))) {
4986 is_illegal = true;
4987 }
4988 }
4989 }
4990 }
4991 }
4992
4993 if (is_illegal) {
4994 ResourceMark rm(THREAD);
4995 Exceptions::fthrow(
4996 THREAD_AND_LOCATION,
4997 vmSymbols::java_lang_ClassFormatError(),
4998 "Method %s in class %s has illegal modifiers: 0x%X",
4999 name->as_C_string(), _class_name->as_C_string(), flags);
5000 return;
5001 }
5002 }
5003
5004 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5005 int length,
5006 TRAPS) const {
5007 assert(_need_verify, "only called when _need_verify is true");
5008 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5009 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5010 }
5011 }
5012
5013 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5014 // In class names, '/' separates unqualified names. This is verified in this function also.
5015 // Method names also may not contain the characters '<' or '>', unless <init>
5016 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5017 // method. Because these names have been checked as special cases before
5018 // calling this method in verify_legal_method_name.
5019 //
5020 // This method is also called from the modular system APIs in modules.cpp
5021 // to verify the validity of module and package names.
5022 bool ClassFileParser::verify_unqualified_name(const char* name,
5023 unsigned int length,
5024 int type) {
5025 for (const char* p = name; p != name + length;) {
5026 jchar ch = *p;
5027 if (ch < 128) {
5028 if (ch == '.' || ch == ';' || ch == '[' ) {
5029 return false; // do not permit '.', ';', or '['
5030 }
5031 if (ch == '/') {
5032 // check for '//' or leading or trailing '/' which are not legal
5033 // unqualified name must not be empty
5034 if (type == ClassFileParser::LegalClass) {
5035 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5036 return false;
5037 }
5038 } else {
5039 return false; // do not permit '/' unless it's class name
5040 }
5041 }
5042 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5043 return false; // do not permit '<' or '>' in method names
5044 }
5045 p++;
5046 } else {
5047 char* tmp_p = UTF8::next(p, &ch);
5048 p = tmp_p;
5049 }
5050 }
5051 return true;
5052 }
5053
5054 // Take pointer to a string. Skip over the longest part of the string that could
5055 // be taken as a fieldname. Allow '/' if slash_ok is true.
5056 // Return a pointer to just past the fieldname.
5057 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5058 // being true, we saw consecutive slashes (meaning we were looking for a
5059 // qualified path but found something that was badly-formed).
5060 static const char* skip_over_field_name(const char* name,
5061 bool slash_ok,
5062 unsigned int length) {
5063 const char* p;
5064 jboolean last_is_slash = false;
5065 jboolean not_first_ch = false;
5066
5067 for (p = name; p != name + length; not_first_ch = true) {
5068 const char* old_p = p;
5069 jchar ch = *p;
5070 if (ch < 128) {
5071 p++;
5072 // quick check for ascii
5073 if ((ch >= 'a' && ch <= 'z') ||
5074 (ch >= 'A' && ch <= 'Z') ||
5075 (ch == '_' || ch == '$') ||
5076 (not_first_ch && ch >= '0' && ch <= '9')) {
5077 last_is_slash = false;
5078 continue;
5079 }
5080 if (slash_ok && ch == '/') {
5081 if (last_is_slash) {
5082 return NULL; // Don't permit consecutive slashes
5083 }
5084 last_is_slash = true;
5085 continue;
5086 }
5087 }
5088 else {
5089 jint unicode_ch;
5090 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5091 p = tmp_p;
5092 last_is_slash = false;
5093 // Check if ch is Java identifier start or is Java identifier part
5094 // 4672820: call java.lang.Character methods directly without generating separate tables.
5095 EXCEPTION_MARK;
5096
5097 // return value
5098 JavaValue result(T_BOOLEAN);
5099 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5100 JavaCallArguments args;
5101 args.push_int(unicode_ch);
5102
5103 // public static boolean isJavaIdentifierStart(char ch);
5104 JavaCalls::call_static(&result,
5105 SystemDictionary::Character_klass(),
5106 vmSymbols::isJavaIdentifierStart_name(),
5107 vmSymbols::int_bool_signature(),
5108 &args,
5109 THREAD);
5110
5111 if (HAS_PENDING_EXCEPTION) {
5112 CLEAR_PENDING_EXCEPTION;
5113 return 0;
5114 }
5115 if (result.get_jboolean()) {
5116 continue;
5117 }
5118
5119 if (not_first_ch) {
5120 // public static boolean isJavaIdentifierPart(char ch);
5121 JavaCalls::call_static(&result,
5122 SystemDictionary::Character_klass(),
5123 vmSymbols::isJavaIdentifierPart_name(),
5124 vmSymbols::int_bool_signature(),
5125 &args,
5126 THREAD);
5127
5128 if (HAS_PENDING_EXCEPTION) {
5129 CLEAR_PENDING_EXCEPTION;
5130 return 0;
5131 }
5132
5133 if (result.get_jboolean()) {
5134 continue;
5135 }
5136 }
5137 }
5138 return (not_first_ch) ? old_p : NULL;
5139 }
5140 return (not_first_ch) ? p : NULL;
5141 }
5142
5143 // Take pointer to a string. Skip over the longest part of the string that could
5144 // be taken as a field signature. Allow "void" if void_ok.
5145 // Return a pointer to just past the signature.
5146 // Return NULL if no legal signature is found.
5147 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5148 bool void_ok,
5149 unsigned int length,
5150 TRAPS) const {
5151 unsigned int array_dim = 0;
5152 while (length > 0) {
5153 switch (signature[0]) {
5154 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5155 case JVM_SIGNATURE_BOOLEAN:
5156 case JVM_SIGNATURE_BYTE:
5157 case JVM_SIGNATURE_CHAR:
5158 case JVM_SIGNATURE_SHORT:
5159 case JVM_SIGNATURE_INT:
5160 case JVM_SIGNATURE_FLOAT:
5161 case JVM_SIGNATURE_LONG:
5162 case JVM_SIGNATURE_DOUBLE:
5163 return signature + 1;
5164 case JVM_SIGNATURE_CLASS: {
5165 if (_major_version < JAVA_1_5_VERSION) {
5166 // Skip over the class name if one is there
5167 const char* const p = skip_over_field_name(signature + 1, true, --length);
5168
5169 // The next character better be a semicolon
5170 if (p && (p - signature) > 1 && p[0] == ';') {
5171 return p + 1;
5172 }
5173 }
5174 else {
5175 // Skip leading 'L' and ignore first appearance of ';'
5176 length--;
5177 signature++;
5178 char* c = strchr((char*) signature, ';');
5179 // Format check signature
5180 if (c != NULL) {
5181 ResourceMark rm(THREAD);
5182 int newlen = c - (char*) signature;
5183 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5184 strncpy(sig, signature, newlen);
5185 sig[newlen] = '\0';
5186
5187 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5188 if (!legal) {
5189 classfile_parse_error("Class name contains illegal character "
5190 "in descriptor in class file %s",
5191 CHECK_0);
5192 return NULL;
5193 }
5194 return signature + newlen + 1;
5195 }
5196 }
5197 return NULL;
5198 }
5199 case JVM_SIGNATURE_ARRAY:
5200 array_dim++;
5201 if (array_dim > 255) {
5202 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5203 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5204 }
5205 // The rest of what's there better be a legal signature
5206 signature++;
5207 length--;
5208 void_ok = false;
5209 break;
5210 default:
5211 return NULL;
5212 }
5213 }
5214 return NULL;
5215 }
5216
5217 // Checks if name is a legal class name.
5218 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5219 if (!_need_verify || _relax_verify) { return; }
5220
5221 char buf[fixed_buffer_size];
5222 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5223 unsigned int length = name->utf8_length();
5224 bool legal = false;
5225
5226 if (length > 0) {
5227 const char* p;
5228 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5229 p = skip_over_field_signature(bytes, false, length, CHECK);
5230 legal = (p != NULL) && ((p - bytes) == (int)length);
5231 } else if (_major_version < JAVA_1_5_VERSION) {
5232 if (bytes[0] != '<') {
5233 p = skip_over_field_name(bytes, true, length);
5234 legal = (p != NULL) && ((p - bytes) == (int)length);
5235 }
5236 } else {
5237 // 4900761: relax the constraints based on JSR202 spec
5238 // Class names may be drawn from the entire Unicode character set.
5239 // Identifiers between '/' must be unqualified names.
5240 // The utf8 string has been verified when parsing cpool entries.
5241 legal = verify_unqualified_name(bytes, length, LegalClass);
5242 }
5243 }
5244 if (!legal) {
5245 ResourceMark rm(THREAD);
5246 assert(_class_name != NULL, "invariant");
5247 Exceptions::fthrow(
5248 THREAD_AND_LOCATION,
5249 vmSymbols::java_lang_ClassFormatError(),
5250 "Illegal class name \"%s\" in class file %s", bytes,
5251 _class_name->as_C_string()
5252 );
5253 return;
5254 }
5255 }
5256
5257 // Checks if name is a legal field name.
5258 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5259 if (!_need_verify || _relax_verify) { return; }
5260
5261 char buf[fixed_buffer_size];
5262 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5263 unsigned int length = name->utf8_length();
5264 bool legal = false;
5265
5266 if (length > 0) {
5267 if (_major_version < JAVA_1_5_VERSION) {
5268 if (bytes[0] != '<') {
5269 const char* p = skip_over_field_name(bytes, false, length);
5270 legal = (p != NULL) && ((p - bytes) == (int)length);
5271 }
5272 } else {
5273 // 4881221: relax the constraints based on JSR202 spec
5274 legal = verify_unqualified_name(bytes, length, LegalField);
5275 }
5276 }
5277
5278 if (!legal) {
5279 ResourceMark rm(THREAD);
5280 assert(_class_name != NULL, "invariant");
5281 Exceptions::fthrow(
5282 THREAD_AND_LOCATION,
5283 vmSymbols::java_lang_ClassFormatError(),
5284 "Illegal field name \"%s\" in class %s", bytes,
5285 _class_name->as_C_string()
5286 );
5287 return;
5288 }
5289 }
5290
5291 // Checks if name is a legal method name.
5292 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5293 if (!_need_verify || _relax_verify) { return; }
5294
5295 assert(name != NULL, "method name is null");
5296 char buf[fixed_buffer_size];
5297 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5298 unsigned int length = name->utf8_length();
5299 bool legal = false;
5300
5301 if (length > 0) {
5302 if (bytes[0] == '<') {
5303 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5304 legal = true;
5305 }
5306 } else if (_major_version < JAVA_1_5_VERSION) {
5307 const char* p;
5308 p = skip_over_field_name(bytes, false, length);
5309 legal = (p != NULL) && ((p - bytes) == (int)length);
5310 } else {
5311 // 4881221: relax the constraints based on JSR202 spec
5312 legal = verify_unqualified_name(bytes, length, LegalMethod);
5313 }
5314 }
5315
5316 if (!legal) {
5317 ResourceMark rm(THREAD);
5318 assert(_class_name != NULL, "invariant");
5319 Exceptions::fthrow(
5320 THREAD_AND_LOCATION,
5321 vmSymbols::java_lang_ClassFormatError(),
5322 "Illegal method name \"%s\" in class %s", bytes,
5323 _class_name->as_C_string()
5324 );
5325 return;
5326 }
5327 }
5328
5329
5330 // Checks if signature is a legal field signature.
5331 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5332 const Symbol* signature,
5333 TRAPS) const {
5334 if (!_need_verify) { return; }
5335
5336 char buf[fixed_buffer_size];
5337 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5338 const unsigned int length = signature->utf8_length();
5339 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5340
5341 if (p == NULL || (p - bytes) != (int)length) {
5342 throwIllegalSignature("Field", name, signature, CHECK);
5343 }
5344 }
5345
5346 // Checks if signature is a legal method signature.
5347 // Returns number of parameters
5348 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5349 const Symbol* signature,
5350 TRAPS) const {
5351 if (!_need_verify) {
5352 // make sure caller's args_size will be less than 0 even for non-static
5353 // method so it will be recomputed in compute_size_of_parameters().
5354 return -2;
5355 }
5356
5357 // Class initializers cannot have args for class format version >= 51.
5358 if (name == vmSymbols::class_initializer_name() &&
5359 signature != vmSymbols::void_method_signature() &&
5360 _major_version >= JAVA_7_VERSION) {
5361 throwIllegalSignature("Method", name, signature, CHECK_0);
5362 return 0;
5363 }
5364
5365 unsigned int args_size = 0;
5366 char buf[fixed_buffer_size];
5367 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5368 unsigned int length = signature->utf8_length();
5369 const char* nextp;
5370
5371 // The first character must be a '('
5372 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5373 length--;
5374 // Skip over legal field signatures
5375 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5376 while ((length > 0) && (nextp != NULL)) {
5377 args_size++;
5378 if (p[0] == 'J' || p[0] == 'D') {
5379 args_size++;
5380 }
5381 length -= nextp - p;
5382 p = nextp;
5383 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5384 }
5385 // The first non-signature thing better be a ')'
5386 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5387 length--;
5388 if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5389 // All internal methods must return void
5390 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5391 return args_size;
5392 }
5393 } else {
5394 // Now we better just have a return value
5395 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5396 if (nextp && ((int)length == (nextp - p))) {
5397 return args_size;
5398 }
5399 }
5400 }
5401 }
5402 // Report error
5403 throwIllegalSignature("Method", name, signature, CHECK_0);
5404 return 0;
5405 }
5406
5407 int ClassFileParser::static_field_size() const {
5408 assert(_field_info != NULL, "invariant");
5409 return _field_info->static_field_size;
5410 }
5411
5412 int ClassFileParser::total_oop_map_count() const {
5413 assert(_field_info != NULL, "invariant");
5414 return _field_info->total_oop_map_count;
5415 }
5416
5417 jint ClassFileParser::layout_size() const {
5418 assert(_field_info != NULL, "invariant");
5419 return _field_info->instance_size;
5420 }
5421
5422 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5423 const Array<Method*>* methods) {
5424 assert(ik != NULL, "invariant");
5425 assert(methods != NULL, "invariant");
5426
5427 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5428 // (We used to do this lazily, but now we query it in Rewriter,
5429 // which is eagerly done for every method, so we might as well do it now,
5430 // when everything is fresh in memory.)
5431 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5432
5433 if (klass_id != vmSymbols::NO_SID) {
5434 for (int j = 0; j < methods->length(); ++j) {
5435 Method* method = methods->at(j);
5436 method->init_intrinsic_id();
5437
5438 if (CheckIntrinsics) {
5439 // Check if an intrinsic is defined for method 'method',
5440 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5441 if (method->intrinsic_id() != vmIntrinsics::_none &&
5442 !method->intrinsic_candidate()) {
5443 tty->print("Compiler intrinsic is defined for method [%s], "
5444 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5445 method->name_and_sig_as_C_string(),
5446 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5447 );
5448 tty->cr();
5449 DEBUG_ONLY(vm_exit(1));
5450 }
5451 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5452 // but there is no intrinsic available for it.
5453 if (method->intrinsic_candidate() &&
5454 method->intrinsic_id() == vmIntrinsics::_none) {
5455 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5456 "but no compiler intrinsic is defined for the method.%s",
5457 method->name_and_sig_as_C_string(),
5458 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5459 );
5460 tty->cr();
5461 DEBUG_ONLY(vm_exit(1));
5462 }
5463 }
5464 } // end for
5465
5466 #ifdef ASSERT
5467 if (CheckIntrinsics) {
5468 // Check for orphan methods in the current class. A method m
5469 // of a class C is orphan if an intrinsic is defined for method m,
5470 // but class C does not declare m.
5471 // The check is potentially expensive, therefore it is available
5472 // only in debug builds.
5473
5474 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5475 if (vmIntrinsics::_compiledLambdaForm == id) {
5476 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5477 // generated for the JVM from a LambdaForm and therefore no method
5478 // is defined for it.
5479 continue;
5480 }
5481
5482 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5483 // Check if the current class contains a method with the same
5484 // name, flags, signature.
5485 bool match = false;
5486 for (int j = 0; j < methods->length(); ++j) {
5487 const Method* method = methods->at(j);
5488 if (method->intrinsic_id() == id) {
5489 match = true;
5490 break;
5491 }
5492 }
5493
5494 if (!match) {
5495 char buf[1000];
5496 tty->print("Compiler intrinsic is defined for method [%s], "
5497 "but the method is not available in class [%s].%s",
5498 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5499 buf, sizeof(buf)),
5500 ik->name()->as_C_string(),
5501 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5502 );
5503 tty->cr();
5504 DEBUG_ONLY(vm_exit(1));
5505 }
5506 }
5507 } // end for
5508 } // CheckIntrinsics
5509 #endif // ASSERT
5510 }
5511 }
5512
5513 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5514 if (_klass != NULL) {
5515 return _klass;
5516 }
5517
5518 InstanceKlass* const ik =
5519 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5520
5521 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5522
5523 assert(_klass == ik, "invariant");
5524
5525 ik->set_has_passed_fingerprint_check(false);
5526 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5527 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5528 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5529 // This class matches with a class saved in an AOT library
5530 ik->set_has_passed_fingerprint_check(true);
5531 } else {
5532 ResourceMark rm;
5533 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5534 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5535 }
5536 }
5537
5538 return ik;
5539 }
5540
5541 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5542 assert(ik != NULL, "invariant");
5543
5544 // Set name and CLD before adding to CLD
5545 ik->set_class_loader_data(_loader_data);
5546 ik->set_name(_class_name);
5547
5548 // Add all classes to our internal class loader list here,
5549 // including classes in the bootstrap (NULL) class loader.
5550 const bool publicize = !is_internal();
5551
5552 _loader_data->add_class(ik, publicize);
5553
5554 set_klass_to_deallocate(ik);
5555
5556 assert(_field_info != NULL, "invariant");
5557 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5558 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5559 "sanity");
5560
5561 assert(ik->is_instance_klass(), "sanity");
5562 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5563
5564 // Fill in information already parsed
5565 ik->set_should_verify_class(_need_verify);
5566
5567 // Not yet: supers are done below to support the new subtype-checking fields
5568 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5569 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5570 assert(_fac != NULL, "invariant");
5571 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5572
5573 // this transfers ownership of a lot of arrays from
5574 // the parser onto the InstanceKlass*
5575 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5576
5577 // note that is not safe to use the fields in the parser from this point on
5578 assert(NULL == _cp, "invariant");
5579 assert(NULL == _fields, "invariant");
5580 assert(NULL == _methods, "invariant");
5581 assert(NULL == _inner_classes, "invariant");
5582 assert(NULL == _nest_members, "invariant");
5583 assert(NULL == _local_interfaces, "invariant");
5584 assert(NULL == _combined_annotations, "invariant");
5585
5586 if (_has_final_method) {
5587 ik->set_has_final_method();
5588 }
5589
5590 ik->copy_method_ordering(_method_ordering, CHECK);
5591 // The InstanceKlass::_methods_jmethod_ids cache
5592 // is managed on the assumption that the initial cache
5593 // size is equal to the number of methods in the class. If
5594 // that changes, then InstanceKlass::idnum_can_increment()
5595 // has to be changed accordingly.
5596 ik->set_initial_method_idnum(ik->methods()->length());
5597
5598 ik->set_this_class_index(_this_class_index);
5599
5600 if (_is_nonfindable || is_unsafe_anonymous()) {
5601 // _this_class_index is a CONSTANT_Class entry that refers to this
5602 // nonfindable or anonymous class itself. If this class needs to refer to its own
5603 // methods or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5604 // _this_class_index. However, because this class is nonfindable or anonymous (it's
5605 // not stored in SystemDictionary), _this_class_index cannot be resolved
5606 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5607 // Therefore, we must eagerly resolve _this_class_index now.
5608 ik->constants()->klass_at_put(_this_class_index, ik);
5609 }
5610
5611 ik->set_minor_version(_minor_version);
5612 ik->set_major_version(_major_version);
5613 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5614 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5615
5616 if (_unsafe_anonymous_host != NULL) {
5617 assert (ik->is_unsafe_anonymous(), "should be the same");
5618 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5619 }
5620
5621 // Set PackageEntry for this_klass
5622 oop cl = ik->class_loader();
5623 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5624 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5625 ik->set_package(cld, CHECK);
5626 // Obtain this_klass' module entry
5627 ModuleEntry* module_entry = ik->module();
5628 assert(module_entry != NULL, "module_entry should always be set");
5629
5630
5631 const Array<Method*>* const methods = ik->methods();
5632 assert(methods != NULL, "invariant");
5633 const int methods_len = methods->length();
5634
5635 check_methods_for_intrinsics(ik, methods);
5636
5637 // Fill in field values obtained by parse_classfile_attributes
5638 if (_parsed_annotations->has_any_annotations()) {
5639 _parsed_annotations->apply_to(ik);
5640 }
5641
5642 apply_parsed_class_attributes(ik);
5643
5644 // Miranda methods
5645 if ((_num_miranda_methods > 0) ||
5646 // if this class introduced new miranda methods or
5647 (_super_klass != NULL && _super_klass->has_miranda_methods())
5648 // super class exists and this class inherited miranda methods
5649 ) {
5650 ik->set_has_miranda_methods(); // then set a flag
5651 }
5652
5653 // Fill in information needed to compute superclasses.
5654 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5655 ik->set_transitive_interfaces(_transitive_interfaces);
5656 _transitive_interfaces = NULL;
5657
5658 // Initialize itable offset tables
5659 klassItable::setup_itable_offset_table(ik);
5660
5661 // Compute transitive closure of interfaces this class implements
5662 // Do final class setup
5663 fill_oop_maps(ik,
5664 _field_info->nonstatic_oop_map_count,
5665 _field_info->nonstatic_oop_offsets,
5666 _field_info->nonstatic_oop_counts);
5667
5668 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5669 set_precomputed_flags(ik);
5670
5671 // check if this class can access its super class
5672 check_super_class_access(ik, CHECK);
5673
5674 // check if this class can access its superinterfaces
5675 check_super_interface_access(ik, CHECK);
5676
5677 // check if this class overrides any final method
5678 check_final_method_override(ik, CHECK);
5679
5680 // reject static interface methods prior to Java 8
5681 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5682 check_illegal_static_method(ik, CHECK);
5683 }
5684
5685 // Obtain java.lang.Module
5686 Handle module_handle(THREAD, module_entry->module());
5687
5688 // Allocate mirror and initialize static fields
5689 // The create_mirror() call will also call compute_modifiers()
5690 java_lang_Class::create_mirror(ik,
5691 Handle(THREAD, _loader_data->class_loader()),
5692 module_handle,
5693 _protection_domain,
5694 CHECK);
5695
5696 assert(_all_mirandas != NULL, "invariant");
5697
5698 // Generate any default methods - default methods are public interface methods
5699 // that have a default implementation. This is new with Java 8.
5700 if (_has_nonstatic_concrete_methods) {
5701 DefaultMethods::generate_default_methods(ik,
5702 _all_mirandas,
5703 CHECK);
5704 }
5705
5706 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5707 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5708 !module_entry->has_default_read_edges()) {
5709 if (!module_entry->set_has_default_read_edges()) {
5710 // We won a potential race
5711 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5712 }
5713 }
5714
5715 // Update the loader_data graph.
5716 record_defined_class_dependencies(ik, CHECK);
5717
5718 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5719
5720 if (!is_internal()) {
5721 if (log_is_enabled(Info, class, load)) {
5722 ResourceMark rm;
5723 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5724 ik->print_class_load_logging(_loader_data, module_name, _stream);
5725 }
5726
5727 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5728 ik->major_version() != JAVA_MIN_SUPPORTED_VERSION &&
5729 log_is_enabled(Info, class, preview)) {
5730 ResourceMark rm;
5731 log_info(class, preview)("Loading preview feature type %s", ik->external_name());
5732 }
5733
5734 if (log_is_enabled(Debug, class, resolve)) {
5735 ResourceMark rm;
5736 // print out the superclass.
5737 const char * from = ik->external_name();
5738 if (ik->java_super() != NULL) {
5739 log_debug(class, resolve)("%s %s (super)",
5740 from,
5741 ik->java_super()->external_name());
5742 }
5743 // print out each of the interface classes referred to by this class.
5744 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5745 if (local_interfaces != NULL) {
5746 const int length = local_interfaces->length();
5747 for (int i = 0; i < length; i++) {
5748 const InstanceKlass* const k = local_interfaces->at(i);
5749 const char * to = k->external_name();
5750 log_debug(class, resolve)("%s %s (interface)", from, to);
5751 }
5752 }
5753 }
5754 }
5755
5756 JFR_ONLY(INIT_ID(ik);)
5757
5758 // If we reach here, all is well.
5759 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5760 // in order for it to not be destroyed in the ClassFileParser destructor.
5761 set_klass_to_deallocate(NULL);
5762
5763 // it's official
5764 set_klass(ik);
5765
5766 debug_only(ik->verify();)
5767 }
5768
5769 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5770 // package by prepending its host class's package name to its class name and setting
5771 // its _class_name field.
5772 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5773 ResourceMark rm(THREAD);
5774 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5775 "Unsafe anonymous class should not be in a package");
5776 const char* host_pkg_name =
5777 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5778
5779 if (host_pkg_name != NULL) {
5780 size_t host_pkg_len = strlen(host_pkg_name);
5781 int class_name_len = _class_name->utf8_length();
5782 char* new_anon_name =
5783 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5784 // Copy host package name and trailing /.
5785 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5786 new_anon_name[host_pkg_len] = '/';
5787 // Append unsafe anonymous class name. The unsafe anonymous class name can contain odd
5788 // characters. So, do a strncpy instead of using sprintf("%s...").
5789 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5790
5791 // Create a symbol and update the anonymous class name.
5792 _class_name = SymbolTable::new_symbol(new_anon_name,
5793 (int)host_pkg_len + 1 + class_name_len,
5794 CHECK);
5795 }
5796 }
5797
5798 // If the host class and the anonymous class are in the same package then do
5799 // nothing. If the anonymous class is in the unnamed package then move it to its
5800 // host's package. If the classes are in different packages then throw an IAE
5801 // exception.
5802 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5803 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5804
5805 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5806 _class_name->utf8_length(), '/');
5807 if (anon_last_slash == NULL) { // Unnamed package
5808 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5809 } else {
5810 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5811 ResourceMark rm(THREAD);
5812 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5813 err_msg("Host class %s and anonymous class %s are in different packages",
5814 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5815 }
5816 }
5817 }
5818
5819 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5820 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5821 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5822 bool need_verify =
5823 // verifyAll
5824 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5825 // verifyRemote
5826 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5827 return !need_verify;
5828 }
5829
5830 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5831 Symbol* name,
5832 ClassLoaderData* loader_data,
5833 Handle protection_domain,
5834 const InstanceKlass* unsafe_anonymous_host,
5835 GrowableArray<Handle>* cp_patches,
5836 const bool is_nonfindable,
5837 const bool can_access_vm_annotations,
5838 Publicity pub_level,
5839 TRAPS) :
5840 _stream(stream),
5841 _requested_name(name),
5842 _loader_data(loader_data),
5843 _unsafe_anonymous_host(unsafe_anonymous_host),
5844 _cp_patches(cp_patches),
5845 _is_nonfindable(is_nonfindable),
5846 _can_access_vm_annotations(can_access_vm_annotations),
5847 _num_patched_klasses(0),
5848 _max_num_patched_klasses(0),
5849 _orig_cp_size(0),
5850 _first_patched_klass_resolved_index(0),
5851 _super_klass(),
5852 _cp(NULL),
5853 _fields(NULL),
5854 _methods(NULL),
5855 _inner_classes(NULL),
5856 _nest_members(NULL),
5857 _nest_host(0),
5858 _local_interfaces(NULL),
5859 _transitive_interfaces(NULL),
5860 _combined_annotations(NULL),
5861 _annotations(NULL),
5862 _type_annotations(NULL),
5863 _fields_annotations(NULL),
5864 _fields_type_annotations(NULL),
5865 _klass(NULL),
5866 _klass_to_deallocate(NULL),
5867 _parsed_annotations(NULL),
5868 _fac(NULL),
5869 _field_info(NULL),
5870 _method_ordering(NULL),
5871 _all_mirandas(NULL),
5872 _vtable_size(0),
5873 _itable_size(0),
5874 _num_miranda_methods(0),
5875 _rt(REF_NONE),
5876 _protection_domain(protection_domain),
5877 _access_flags(),
5878 _pub_level(pub_level),
5879 _bad_constant_seen(0),
5880 _synthetic_flag(false),
5881 _sde_length(false),
5882 _sde_buffer(NULL),
5883 _sourcefile_index(0),
5884 _generic_signature_index(0),
5885 _major_version(0),
5886 _minor_version(0),
5887 _this_class_index(0),
5888 _super_class_index(0),
5889 _itfs_len(0),
5890 _java_fields_count(0),
5891 _need_verify(false),
5892 _relax_verify(false),
5893 _has_nonstatic_concrete_methods(false),
5894 _declares_nonstatic_concrete_methods(false),
5895 _has_final_method(false),
5896 _has_finalizer(false),
5897 _has_empty_finalizer(false),
5898 _has_vanilla_constructor(false),
5899 _max_bootstrap_specifier_index(-1) {
5900
5901 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5902
5903 assert(THREAD->is_Java_thread(), "invariant");
5904 assert(_loader_data != NULL, "invariant");
5905 assert(stream != NULL, "invariant");
5906 assert(_stream != NULL, "invariant");
5907 assert(_stream->buffer() == _stream->current(), "invariant");
5908 assert(_class_name != NULL, "invariant");
5909 assert(0 == _access_flags.as_int(), "invariant");
5910
5911 // Figure out whether we can skip format checking (matching classic VM behavior)
5912 if (DumpSharedSpaces) {
5913 // verify == true means it's a 'remote' class (i.e., non-boot class)
5914 // Verification decision is based on BytecodeVerificationRemote flag
5915 // for those classes.
5916 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5917 BytecodeVerificationLocal;
5918 }
5919 else {
5920 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5921 stream->need_verify());
5922 }
5923 if (_cp_patches != NULL) {
5924 int len = _cp_patches->length();
5925 for (int i=0; i<len; i++) {
5926 if (has_cp_patch_at(i)) {
5927 Handle patch = cp_patch_at(i);
5928 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5929 // We need to append the names of the patched classes to the end of the constant pool,
5930 // because a patched class may have a Utf8 name that's not already included in the
5931 // original constant pool. These class names are used when patch_constant_pool()
5932 // calls patch_class().
5933 //
5934 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5935 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5936 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5937 _max_num_patched_klasses++;
5938 }
5939 }
5940 }
5941 }
5942
5943 // synch back verification state to stream
5944 stream->set_verify(_need_verify);
5945
5946 // Check if verification needs to be relaxed for this class file
5947 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5948 _relax_verify = relax_format_check_for(_loader_data);
5949
5950 parse_stream(stream, CHECK);
5951
5952 post_process_parsed_stream(stream, _cp, CHECK);
5953 }
5954
5955 void ClassFileParser::clear_class_metadata() {
5956 // metadata created before the instance klass is created. Must be
5957 // deallocated if classfile parsing returns an error.
5958 _cp = NULL;
5959 _fields = NULL;
5960 _methods = NULL;
5961 _inner_classes = NULL;
5962 _nest_members = NULL;
5963 _local_interfaces = NULL;
5964 _combined_annotations = NULL;
5965 _annotations = _type_annotations = NULL;
5966 _fields_annotations = _fields_type_annotations = NULL;
5967 }
5968
5969 // Destructor to clean up
5970 ClassFileParser::~ClassFileParser() {
5971 if (_cp != NULL) {
5972 MetadataFactory::free_metadata(_loader_data, _cp);
5973 }
5974 if (_fields != NULL) {
5975 MetadataFactory::free_array<u2>(_loader_data, _fields);
5976 }
5977
5978 if (_methods != NULL) {
5979 // Free methods
5980 InstanceKlass::deallocate_methods(_loader_data, _methods);
5981 }
5982
5983 // beware of the Universe::empty_blah_array!!
5984 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5985 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5986 }
5987
5988 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5989 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5990 }
5991
5992 // Free interfaces
5993 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5994 _local_interfaces, _transitive_interfaces);
5995
5996 if (_combined_annotations != NULL) {
5997 // After all annotations arrays have been created, they are installed into the
5998 // Annotations object that will be assigned to the InstanceKlass being created.
5999
6000 // Deallocate the Annotations object and the installed annotations arrays.
6001 _combined_annotations->deallocate_contents(_loader_data);
6002
6003 // If the _combined_annotations pointer is non-NULL,
6004 // then the other annotations fields should have been cleared.
6005 assert(_annotations == NULL, "Should have been cleared");
6006 assert(_type_annotations == NULL, "Should have been cleared");
6007 assert(_fields_annotations == NULL, "Should have been cleared");
6008 assert(_fields_type_annotations == NULL, "Should have been cleared");
6009 } else {
6010 // If the annotations arrays were not installed into the Annotations object,
6011 // then they have to be deallocated explicitly.
6012 MetadataFactory::free_array<u1>(_loader_data, _annotations);
6013 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6014 Annotations::free_contents(_loader_data, _fields_annotations);
6015 Annotations::free_contents(_loader_data, _fields_type_annotations);
6016 }
6017
6018 clear_class_metadata();
6019 _transitive_interfaces = NULL;
6020
6021 // deallocate the klass if already created. Don't directly deallocate, but add
6022 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6023 // at a safepoint.
6024 if (_klass_to_deallocate != NULL) {
6025 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6026 }
6027 }
6028
6029 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6030 TRAPS) {
6031
6032 assert(stream != NULL, "invariant");
6033 assert(_class_name != NULL, "invariant");
6034
6035 // BEGIN STREAM PARSING
6036 stream->guarantee_more(8, CHECK); // magic, major, minor
6037 // Magic value
6038 const u4 magic = stream->get_u4_fast();
6039 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6040 "Incompatible magic value %u in class file %s",
6041 magic, CHECK);
6042
6043 // Version numbers
6044 _minor_version = stream->get_u2_fast();
6045 _major_version = stream->get_u2_fast();
6046
6047 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6048 ResourceMark rm;
6049 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6050 _major_version, _minor_version, _class_name->as_C_string());
6051 Exceptions::fthrow(
6052 THREAD_AND_LOCATION,
6053 vmSymbols::java_lang_UnsupportedClassVersionError(),
6054 "Unsupported major.minor version for dump time %u.%u",
6055 _major_version,
6056 _minor_version);
6057 }
6058
6059 // Check version numbers - we check this even with verifier off
6060 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6061
6062 stream->guarantee_more(3, CHECK); // length, first cp tag
6063 u2 cp_size = stream->get_u2_fast();
6064
6065 guarantee_property(
6066 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6067 cp_size, CHECK);
6068
6069 _orig_cp_size = cp_size;
6070 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6071 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6072 }
6073 cp_size += _max_num_patched_klasses;
6074
6075 _cp = ConstantPool::allocate(_loader_data,
6076 cp_size,
6077 CHECK);
6078
6079 ConstantPool* const cp = _cp;
6080
6081 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6082
6083 assert(cp_size == (const u2)cp->length(), "invariant");
6084
6085 // ACCESS FLAGS
6086 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6087
6088 // Access flags
6089 jint flags;
6090 // JVM_ACC_MODULE is defined in JDK-9 and later.
6091 if (_major_version >= JAVA_9_VERSION) {
6092 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6093 } else {
6094 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6095 }
6096
6097 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6098 // Set abstract bit for old class files for backward compatibility
6099 flags |= JVM_ACC_ABSTRACT;
6100 }
6101
6102 verify_legal_class_modifiers(flags, CHECK);
6103
6104 short bad_constant = class_bad_constant_seen();
6105 if (bad_constant != 0) {
6106 // Do not throw CFE until after the access_flags are checked because if
6107 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6108 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6109 }
6110
6111 _access_flags.set_flags(flags);
6112
6113 // This class and superclass
6114 _this_class_index = stream->get_u2_fast();
6115 check_property(
6116 valid_cp_range(_this_class_index, cp_size) &&
6117 cp->tag_at(_this_class_index).is_unresolved_klass(),
6118 "Invalid this class index %u in constant pool in class file %s",
6119 _this_class_index, CHECK);
6120
6121 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6122 assert(class_name_in_cp != NULL, "class_name can't be null");
6123
6124 // Update _class_name which could be null previously
6125 // to reflect the name in the constant pool
6126 _class_name = class_name_in_cp;
6127
6128 // Don't need to check whether this class name is legal or not.
6129 // It has been checked when constant pool is parsed.
6130 // However, make sure it is not an array type.
6131 if (_need_verify) {
6132 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6133 "Bad class name in class file %s",
6134 CHECK);
6135 }
6136
6137 // Checks if name in class file matches requested name
6138 if (_requested_name != NULL && _requested_name != _class_name) {
6139 ResourceMark rm(THREAD);
6140 Exceptions::fthrow(
6141 THREAD_AND_LOCATION,
6142 vmSymbols::java_lang_NoClassDefFoundError(),
6143 "%s (wrong name: %s)",
6144 _class_name->as_C_string(),
6145 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6146 );
6147 return;
6148 }
6149
6150 // if this is an anonymous class fix up its name if it's in the unnamed
6151 // package. Otherwise, throw IAE if it is in a different package than
6152 // its host class.
6153 if (_unsafe_anonymous_host != NULL) {
6154 fix_unsafe_anonymous_class_name(CHECK);
6155 }
6156
6157 // Verification prevents us from creating names with dots in them, this
6158 // asserts that that's the case.
6159 assert(is_internal_format(_class_name), "external class name format used internally");
6160
6161 if (!is_internal()) {
6162 LogTarget(Debug, class, preorder) lt;
6163 if (lt.is_enabled()){
6164 ResourceMark rm(THREAD);
6165 LogStream ls(lt);
6166 ls.print("%s", _class_name->as_klass_external_name());
6167 if (stream->source() != NULL) {
6168 ls.print(" source: %s", stream->source());
6169 }
6170 ls.cr();
6171 }
6172
6173 #if INCLUDE_CDS
6174 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6175 if (!ClassLoader::has_jrt_entry()) {
6176 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6177 DumpLoadedClassList = NULL;
6178 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6179 !_is_nonfindable &&
6180 _unsafe_anonymous_host == NULL) {
6181 // Only dump the classes that can be stored into CDS archive.
6182 // Nonfindable and unsafe anonymous classes such as generated LambdaForm classes are also not included.
6183 oop class_loader = _loader_data->class_loader();
6184 ResourceMark rm(THREAD);
6185 bool skip = false;
6186 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6187 // For the boot and platform class loaders, skip classes that are not found in the
6188 // java runtime image, such as those found in the --patch-module entries.
6189 // These classes can't be loaded from the archive during runtime.
6190 if (!ClassLoader::is_modules_image(stream->source()) && strncmp(stream->source(), "jrt:", 4) != 0) {
6191 skip = true;
6192 }
6193
6194 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6195 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6196 // as they can be loaded from the archive during runtime.
6197 skip = false;
6198 }
6199 }
6200 if (skip) {
6201 tty->print_cr("skip writing class %s from source %s to classlist file",
6202 _class_name->as_C_string(), stream->source());
6203 } else {
6204 classlist_file->print_cr("%s", _class_name->as_C_string());
6205 classlist_file->flush();
6206 }
6207 }
6208 }
6209 #endif
6210 }
6211
6212 // SUPERKLASS
6213 _super_class_index = stream->get_u2_fast();
6214 _super_klass = parse_super_class(cp,
6215 _super_class_index,
6216 _need_verify,
6217 CHECK);
6218
6219 // Interfaces
6220 _itfs_len = stream->get_u2_fast();
6221 parse_interfaces(stream,
6222 _itfs_len,
6223 cp,
6224 &_has_nonstatic_concrete_methods,
6225 CHECK);
6226
6227 assert(_local_interfaces != NULL, "invariant");
6228
6229 // Fields (offsets are filled in later)
6230 _fac = new FieldAllocationCount();
6231 parse_fields(stream,
6232 _access_flags.is_interface(),
6233 _fac,
6234 cp,
6235 cp_size,
6236 &_java_fields_count,
6237 CHECK);
6238
6239 assert(_fields != NULL, "invariant");
6240
6241 // Methods
6242 AccessFlags promoted_flags;
6243 parse_methods(stream,
6244 _access_flags.is_interface(),
6245 &promoted_flags,
6246 &_has_final_method,
6247 &_declares_nonstatic_concrete_methods,
6248 CHECK);
6249
6250 assert(_methods != NULL, "invariant");
6251
6252 // promote flags from parse_methods() to the klass' flags
6253 _access_flags.add_promoted_flags(promoted_flags.as_int());
6254
6255 if (_declares_nonstatic_concrete_methods) {
6256 _has_nonstatic_concrete_methods = true;
6257 }
6258
6259 // Additional attributes/annotations
6260 _parsed_annotations = new ClassAnnotationCollector();
6261 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6262
6263 assert(_inner_classes != NULL, "invariant");
6264
6265 // Finalize the Annotations metadata object,
6266 // now that all annotation arrays have been created.
6267 create_combined_annotations(CHECK);
6268
6269 // Make sure this is the end of class file stream
6270 guarantee_property(stream->at_eos(),
6271 "Extra bytes at the end of class file %s",
6272 CHECK);
6273
6274 // all bytes in stream read and parsed
6275 }
6276
6277 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6278 ConstantPool* cp,
6279 TRAPS) {
6280 assert(stream != NULL, "invariant");
6281 assert(stream->at_eos(), "invariant");
6282 assert(cp != NULL, "invariant");
6283 assert(_loader_data != NULL, "invariant");
6284
6285 if (_class_name == vmSymbols::java_lang_Object()) {
6286 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6287 "java.lang.Object cannot implement an interface in class file %s",
6288 CHECK);
6289 }
6290 // We check super class after class file is parsed and format is checked
6291 if (_super_class_index > 0 && NULL ==_super_klass) {
6292 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6293 if (_access_flags.is_interface()) {
6294 // Before attempting to resolve the superclass, check for class format
6295 // errors not checked yet.
6296 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6297 "Interfaces must have java.lang.Object as superclass in class file %s",
6298 CHECK);
6299 }
6300 Handle loader(THREAD, _loader_data->class_loader());
6301 _super_klass = (const InstanceKlass*)
6302 SystemDictionary::resolve_super_or_fail(_class_name,
6303 super_class_name,
6304 loader,
6305 _protection_domain,
6306 true,
6307 CHECK);
6308 }
6309
6310 if (_super_klass != NULL) {
6311 if (_super_klass->has_nonstatic_concrete_methods()) {
6312 _has_nonstatic_concrete_methods = true;
6313 }
6314
6315 if (_super_klass->is_interface()) {
6316 ResourceMark rm(THREAD);
6317 Exceptions::fthrow(
6318 THREAD_AND_LOCATION,
6319 vmSymbols::java_lang_IncompatibleClassChangeError(),
6320 "class %s has interface %s as super class",
6321 _class_name->as_klass_external_name(),
6322 _super_klass->external_name()
6323 );
6324 return;
6325 }
6326 // Make sure super class is not final
6327 if (_super_klass->is_final()) {
6328 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6329 }
6330 }
6331
6332 // Compute the transitive list of all unique interfaces implemented by this class
6333 _transitive_interfaces =
6334 compute_transitive_interfaces(_super_klass,
6335 _local_interfaces,
6336 _loader_data,
6337 CHECK);
6338
6339 assert(_transitive_interfaces != NULL, "invariant");
6340
6341 // sort methods
6342 _method_ordering = sort_methods(_methods);
6343
6344 _all_mirandas = new GrowableArray<Method*>(20);
6345
6346 Handle loader(THREAD, _loader_data->class_loader());
6347 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6348 &_num_miranda_methods,
6349 _all_mirandas,
6350 _super_klass,
6351 _methods,
6352 _access_flags,
6353 _major_version,
6354 loader,
6355 _class_name,
6356 _local_interfaces,
6357 CHECK);
6358
6359 // Size of Java itable (in words)
6360 _itable_size = _access_flags.is_interface() ? 0 :
6361 klassItable::compute_itable_size(_transitive_interfaces);
6362
6363 assert(_fac != NULL, "invariant");
6364 assert(_parsed_annotations != NULL, "invariant");
6365
6366 _field_info = new FieldLayoutInfo();
6367 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6368
6369 // Compute reference typ
6370 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6371
6372 }
6373
6374 void ClassFileParser::set_klass(InstanceKlass* klass) {
6375
6376 #ifdef ASSERT
6377 if (klass != NULL) {
6378 assert(NULL == _klass, "leaking?");
6379 }
6380 #endif
6381
6382 _klass = klass;
6383 }
6384
6385 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6386
6387 #ifdef ASSERT
6388 if (klass != NULL) {
6389 assert(NULL == _klass_to_deallocate, "leaking?");
6390 }
6391 #endif
6392
6393 _klass_to_deallocate = klass;
6394 }
6395
6396 // Caller responsible for ResourceMark
6397 // clone stream with rewound position
6398 const ClassFileStream* ClassFileParser::clone_stream() const {
6399 assert(_stream != NULL, "invariant");
6400
6401 return _stream->clone();
6402 }
6403 // ----------------------------------------------------------------------------
6404 // debugging
6405
6406 #ifdef ASSERT
6407
6408 // return true if class_name contains no '.' (internal format is '/')
6409 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6410 if (class_name != NULL) {
6411 ResourceMark rm;
6412 char* name = class_name->as_C_string();
6413 return strchr(name, '.') == NULL;
6414 } else {
6415 return true;
6416 }
6417 }
6418
6419 #endif