1 /*
2 * Copyright (c) 1997, 2017, 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 "aot/aotLoader.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/dictionary.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/verificationType.hpp"
37 #include "classfile/verifier.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.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.inline.hpp"
47 #include "oops/annotations.hpp"
48 #include "oops/fieldStreams.hpp"
49 #include "oops/instanceKlass.hpp"
50 #include "oops/instanceMirrorKlass.hpp"
51 #include "oops/klass.inline.hpp"
52 #include "oops/klassVtable.hpp"
53 #include "oops/metadata.hpp"
54 #include "oops/method.hpp"
55 #include "oops/oop.inline.hpp"
56 #include "oops/symbol.hpp"
57 #include "oops/valueKlass.hpp"
58 #include "prims/jvm.h"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/perfData.hpp"
63 #include "runtime/reflection.hpp"
64 #include "runtime/signature.hpp"
65 #include "runtime/timer.hpp"
66 #include "services/classLoadingService.hpp"
67 #include "services/threadService.hpp"
68 #include "trace/traceMacros.hpp"
69 #include "utilities/align.hpp"
70 #include "utilities/bitMap.inline.hpp"
71 #include "utilities/exceptions.hpp"
72 #include "utilities/globalDefinitions.hpp"
73 #include "utilities/growableArray.hpp"
74 #include "utilities/macros.hpp"
75 #include "utilities/ostream.hpp"
76 #include "utilities/resourceHash.hpp"
77 #if INCLUDE_CDS
78 #include "classfile/systemDictionaryShared.hpp"
79 #endif
80
81 // We generally try to create the oops directly when parsing, rather than
82 // allocating temporary data structures and copying the bytes twice. A
83 // temporary area is only needed when parsing utf8 entries in the constant
84 // pool and when parsing line number tables.
85
86 // We add assert in debug mode when class format is not checked.
87
88 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
89 #define JAVA_MIN_SUPPORTED_VERSION 45
90 #define JAVA_MAX_SUPPORTED_VERSION 53
91 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 1
92
93 // Used for two backward compatibility reasons:
94 // - to check for new additions to the class file format in JDK1.5
95 // - to check for bug fixes in the format checker in JDK1.5
96 #define JAVA_1_5_VERSION 49
97
98 // Used for backward compatibility reasons:
99 // - to check for javac bug fixes that happened after 1.5
100 // - also used as the max version when running in jdk6
101 #define JAVA_6_VERSION 50
102
103 // Used for backward compatibility reasons:
104 // - to disallow argument and require ACC_STATIC for <clinit> methods
105 #define JAVA_7_VERSION 51
106
107 // Extension method support.
108 #define JAVA_8_VERSION 52
109
110 #define JAVA_9_VERSION 53
111
112 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
113 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
114 "Unexpected bad constant pool entry");
115 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
116 }
117
118 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
119 ConstantPool* cp,
120 const int length,
121 TRAPS) {
122 assert(stream != NULL, "invariant");
123 assert(cp != NULL, "invariant");
124
125 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
126 // this function (_current can be allocated in a register, with scalar
127 // replacement of aggregates). The _current pointer is copied back to
128 // stream() when this function returns. DON'T call another method within
129 // this method that uses stream().
130 const ClassFileStream cfs1 = *stream;
131 const ClassFileStream* const cfs = &cfs1;
132
133 assert(cfs->allocated_on_stack(), "should be local");
134 debug_only(const u1* const old_current = stream->current();)
135
136 // Used for batching symbol allocations.
137 const char* names[SymbolTable::symbol_alloc_batch_size];
138 int lengths[SymbolTable::symbol_alloc_batch_size];
139 int indices[SymbolTable::symbol_alloc_batch_size];
140 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
141 int names_count = 0;
142
143 // parsing Index 0 is unused
144 for (int index = 1; index < length; index++) {
145 // Each of the following case guarantees one more byte in the stream
146 // for the following tag or the access_flags following constant pool,
147 // so we don't need bounds-check for reading tag.
148 const u1 tag = cfs->get_u1_fast();
149 switch (tag) {
150 case JVM_CONSTANT_Class: {
151 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
152 const u2 name_index = cfs->get_u2_fast();
153 cp->klass_index_at_put(index, name_index);
154 break;
155 }
156 case JVM_CONSTANT_Value: { // may be present in a retransform situation
157 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
158 const u2 name_index = cfs->get_u2_fast();
159 cp->value_type_index_at_put(index, name_index);
160 break;
161 }
162 case JVM_CONSTANT_Fieldref: {
163 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
164 const u2 class_index = cfs->get_u2_fast();
165 const u2 name_and_type_index = cfs->get_u2_fast();
166 cp->field_at_put(index, class_index, name_and_type_index);
167 break;
168 }
169 case JVM_CONSTANT_Methodref: {
170 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
171 const u2 class_index = cfs->get_u2_fast();
172 const u2 name_and_type_index = cfs->get_u2_fast();
173 cp->method_at_put(index, class_index, name_and_type_index);
174 break;
175 }
176 case JVM_CONSTANT_InterfaceMethodref: {
177 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
178 const u2 class_index = cfs->get_u2_fast();
179 const u2 name_and_type_index = cfs->get_u2_fast();
180 cp->interface_method_at_put(index, class_index, name_and_type_index);
181 break;
182 }
183 case JVM_CONSTANT_String : {
184 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
185 const u2 string_index = cfs->get_u2_fast();
186 cp->string_index_at_put(index, string_index);
187 break;
188 }
189 case JVM_CONSTANT_MethodHandle :
190 case JVM_CONSTANT_MethodType: {
191 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
192 classfile_parse_error(
193 "Class file version does not support constant tag %u in class file %s",
194 tag, CHECK);
195 }
196 if (tag == JVM_CONSTANT_MethodHandle) {
197 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
198 const u1 ref_kind = cfs->get_u1_fast();
199 const u2 method_index = cfs->get_u2_fast();
200 cp->method_handle_index_at_put(index, ref_kind, method_index);
201 }
202 else if (tag == JVM_CONSTANT_MethodType) {
203 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
204 const u2 signature_index = cfs->get_u2_fast();
205 cp->method_type_index_at_put(index, signature_index);
206 }
207 else {
208 ShouldNotReachHere();
209 }
210 break;
211 }
212 case JVM_CONSTANT_InvokeDynamic : {
213 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
214 classfile_parse_error(
215 "Class file version does not support constant tag %u in class file %s",
216 tag, CHECK);
217 }
218 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
219 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
220 const u2 name_and_type_index = cfs->get_u2_fast();
221 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
222 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
223 }
224 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
225 break;
226 }
227 case JVM_CONSTANT_Integer: {
228 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
229 const u4 bytes = cfs->get_u4_fast();
230 cp->int_at_put(index, (jint)bytes);
231 break;
232 }
233 case JVM_CONSTANT_Float: {
234 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
235 const u4 bytes = cfs->get_u4_fast();
236 cp->float_at_put(index, *(jfloat*)&bytes);
237 break;
238 }
239 case JVM_CONSTANT_Long: {
240 // A mangled type might cause you to overrun allocated memory
241 guarantee_property(index + 1 < length,
242 "Invalid constant pool entry %u in class file %s",
243 index,
244 CHECK);
245 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
246 const u8 bytes = cfs->get_u8_fast();
247 cp->long_at_put(index, bytes);
248 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
249 break;
250 }
251 case JVM_CONSTANT_Double: {
252 // A mangled type might cause you to overrun allocated memory
253 guarantee_property(index+1 < length,
254 "Invalid constant pool entry %u in class file %s",
255 index,
256 CHECK);
257 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
258 const u8 bytes = cfs->get_u8_fast();
259 cp->double_at_put(index, *(jdouble*)&bytes);
260 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
261 break;
262 }
263 case JVM_CONSTANT_NameAndType: {
264 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
265 const u2 name_index = cfs->get_u2_fast();
266 const u2 signature_index = cfs->get_u2_fast();
267 cp->name_and_type_at_put(index, name_index, signature_index);
268 break;
269 }
270 case JVM_CONSTANT_Utf8 : {
271 cfs->guarantee_more(2, CHECK); // utf8_length
272 u2 utf8_length = cfs->get_u2_fast();
273 const u1* utf8_buffer = cfs->current();
274 assert(utf8_buffer != NULL, "null utf8 buffer");
275 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
276 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
277 cfs->skip_u1_fast(utf8_length);
278
279 // Before storing the symbol, make sure it's legal
280 if (_need_verify) {
281 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
282 }
283
284 if (has_cp_patch_at(index)) {
285 Handle patch = clear_cp_patch_at(index);
286 guarantee_property(java_lang_String::is_instance(patch()),
287 "Illegal utf8 patch at %d in class file %s",
288 index,
289 CHECK);
290 const char* const str = java_lang_String::as_utf8_string(patch());
291 // (could use java_lang_String::as_symbol instead, but might as well batch them)
292 utf8_buffer = (const u1*) str;
293 utf8_length = (int) strlen(str);
294 }
295
296 unsigned int hash;
297 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
298 utf8_length,
299 hash);
300 if (result == NULL) {
301 names[names_count] = (const char*)utf8_buffer;
302 lengths[names_count] = utf8_length;
303 indices[names_count] = index;
304 hashValues[names_count++] = hash;
305 if (names_count == SymbolTable::symbol_alloc_batch_size) {
306 SymbolTable::new_symbols(_loader_data,
307 cp,
308 names_count,
309 names,
310 lengths,
311 indices,
312 hashValues,
313 CHECK);
314 names_count = 0;
315 }
316 } else {
317 cp->symbol_at_put(index, result);
318 }
319 break;
320 }
321 case 19:
322 case 20: {
323 // Record that an error occurred in these two cases but keep parsing so
324 // that ACC_Module can be checked for in the access_flags. Need to
325 // throw NoClassDefFoundError in that case.
326 if (_major_version >= JAVA_9_VERSION) {
327 cfs->guarantee_more(3, CHECK);
328 cfs->get_u2_fast();
329 set_class_bad_constant_seen(tag);
330 break;
331 }
332 }
333 default: {
334 classfile_parse_error("Unknown constant tag %u in class file %s",
335 tag,
336 CHECK);
337 break;
338 }
339 } // end of switch(tag)
340 } // end of for
341
342 // Allocate the remaining symbols
343 if (names_count > 0) {
344 SymbolTable::new_symbols(_loader_data,
345 cp,
346 names_count,
347 names,
348 lengths,
349 indices,
350 hashValues,
351 CHECK);
352 }
353
354 // Copy _current pointer of local copy back to stream.
355 assert(stream->current() == old_current, "non-exclusive use of stream");
356 stream->set_current(cfs1.current());
357
358 }
359
360 static inline bool valid_cp_range(int index, int length) {
361 return (index > 0 && index < length);
362 }
363
364 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
365 assert(cp != NULL, "invariant");
366 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
367 return cp->symbol_at(index);
368 }
369 return NULL;
370 }
371
372 #ifdef ASSERT
373 PRAGMA_DIAG_PUSH
374 PRAGMA_FORMAT_NONLITERAL_IGNORED
375 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
376 ResourceMark rm(THREAD);
377 fatal(msg, _class_name->as_C_string());
378 }
379
380 void ClassFileParser::report_assert_property_failure(const char* msg,
381 int index,
382 TRAPS) const {
383 ResourceMark rm(THREAD);
384 fatal(msg, index, _class_name->as_C_string());
385 }
386 PRAGMA_DIAG_POP
387 #endif
388
389 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
390 ConstantPool* const cp,
391 const int length,
392 TRAPS) {
393 assert(cp != NULL, "invariant");
394 assert(stream != NULL, "invariant");
395
396 // parsing constant pool entries
397 parse_constant_pool_entries(stream, cp, length, CHECK);
398 if (class_bad_constant_seen() != 0) {
399 // a bad CP entry has been detected previously so stop parsing and just return.
400 return;
401 }
402
403 int index = 1; // declared outside of loops for portability
404 int num_klasses = 0;
405
406 // first verification pass - validate cross references
407 // and fixup class and string constants
408 for (index = 1; index < length; index++) { // Index 0 is unused
409 const jbyte tag = cp->tag_at(index).value();
410 switch (tag) {
411 case JVM_CONSTANT_Class:
412 case JVM_CONSTANT_Value: {
413 ShouldNotReachHere(); // Only JVM_CONSTANT_[Class|Value]Index should be present
414 break;
415 }
416 case JVM_CONSTANT_Fieldref:
417 // fall through
418 case JVM_CONSTANT_Methodref:
419 // fall through
420 case JVM_CONSTANT_InterfaceMethodref: {
421 if (!_need_verify) break;
422 const int klass_ref_index = cp->klass_ref_index_at(index);
423 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
424 check_property(valid_klass_reference_at(klass_ref_index),
425 "Invalid constant pool index %u in class file %s",
426 klass_ref_index, CHECK);
427 check_property(valid_cp_range(name_and_type_ref_index, length) &&
428 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
429 "Invalid constant pool index %u in class file %s",
430 name_and_type_ref_index, CHECK);
431 break;
432 }
433 case JVM_CONSTANT_String: {
434 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
435 break;
436 }
437 case JVM_CONSTANT_Integer:
438 break;
439 case JVM_CONSTANT_Float:
440 break;
441 case JVM_CONSTANT_Long:
442 case JVM_CONSTANT_Double: {
443 index++;
444 check_property(
445 (index < length && cp->tag_at(index).is_invalid()),
446 "Improper constant pool long/double index %u in class file %s",
447 index, CHECK);
448 break;
449 }
450 case JVM_CONSTANT_NameAndType: {
451 if (!_need_verify) break;
452 const int name_ref_index = cp->name_ref_index_at(index);
453 const int signature_ref_index = cp->signature_ref_index_at(index);
454 check_property(valid_symbol_at(name_ref_index),
455 "Invalid constant pool index %u in class file %s",
456 name_ref_index, CHECK);
457 check_property(valid_symbol_at(signature_ref_index),
458 "Invalid constant pool index %u in class file %s",
459 signature_ref_index, CHECK);
460 break;
461 }
462 case JVM_CONSTANT_Utf8:
463 break;
464 case JVM_CONSTANT_UnresolvedClass: // fall-through
465 case JVM_CONSTANT_UnresolvedClassInError: {
466 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
467 break;
468 }
469 case JVM_CONSTANT_ClassIndex: {
470 const int class_index = cp->klass_index_at(index);
471 check_property(valid_symbol_at(class_index),
472 "Invalid constant pool index %u in class file %s",
473 class_index, CHECK);
474
475 Symbol* const name = cp->symbol_at(class_index);
476 const unsigned int name_len = name->utf8_length();
477
478 // check explicitly for ;Qjava/lang/__Value;
479 if (name_len == 20 &&
480 name->equals(";Qjava/lang/__Value;")) {
481 cp->symbol_at_put(class_index, vmSymbols::java_lang____Value());
482 cp->unresolved_value_type_at_put(index, class_index, num_klasses++);
483 } else if (EnableValhalla || EnableMVT) {
484 // check for a value type
485 // check for name > 3 to rule out ";Q;" where no name is present
486 if (name_len != 0 &&
487 name_len > 3 &&
488 name->byte_at(0) == ';' &&
489 name->byte_at(1) == 'Q' &&
490 name->byte_at(name_len-1) == ';') {
491 Symbol* const strippedsym = SymbolTable::new_symbol(name, 2, name_len-1, CHECK);
492 assert(strippedsym != NULL, "failure to create value type stripped name");
493 cp->symbol_at_put(class_index, strippedsym);
494 cp->unresolved_value_type_at_put(index, class_index, num_klasses++);
495 } else {
496 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
497 }
498 } else {
499 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
500 }
501 break;
502 }
503 case JVM_CONSTANT_ValueIndex: {
504 const int class_index = cp->value_type_index_at(index);
505 check_property(valid_symbol_at(class_index),
506 "Invalid constant pool index %u in class file %s",
507 class_index, CHECK);
508 cp->unresolved_value_type_at_put(index, class_index, num_klasses++);
509 break;
510 }
511 case JVM_CONSTANT_StringIndex: {
512 const int string_index = cp->string_index_at(index);
513 check_property(valid_symbol_at(string_index),
514 "Invalid constant pool index %u in class file %s",
515 string_index, CHECK);
516 Symbol* const sym = cp->symbol_at(string_index);
517 cp->unresolved_string_at_put(index, sym);
518 break;
519 }
520 case JVM_CONSTANT_MethodHandle: {
521 const int ref_index = cp->method_handle_index_at(index);
522 check_property(valid_cp_range(ref_index, length),
523 "Invalid constant pool index %u in class file %s",
524 ref_index, CHECK);
525 const constantTag tag = cp->tag_at(ref_index);
526 const int ref_kind = cp->method_handle_ref_kind_at(index);
527
528 switch (ref_kind) {
529 case JVM_REF_getField:
530 case JVM_REF_getStatic:
531 case JVM_REF_putField:
532 case JVM_REF_putStatic: {
533 check_property(
534 tag.is_field(),
535 "Invalid constant pool index %u in class file %s (not a field)",
536 ref_index, CHECK);
537 break;
538 }
539 case JVM_REF_invokeVirtual:
540 case JVM_REF_newInvokeSpecial: {
541 check_property(
542 tag.is_method(),
543 "Invalid constant pool index %u in class file %s (not a method)",
544 ref_index, CHECK);
545 break;
546 }
547 case JVM_REF_invokeStatic:
548 case JVM_REF_invokeSpecial: {
549 check_property(
550 tag.is_method() ||
551 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
552 "Invalid constant pool index %u in class file %s (not a method)",
553 ref_index, CHECK);
554 break;
555 }
556 case JVM_REF_invokeInterface: {
557 check_property(
558 tag.is_interface_method(),
559 "Invalid constant pool index %u in class file %s (not an interface method)",
560 ref_index, CHECK);
561 break;
562 }
563 default: {
564 classfile_parse_error(
565 "Bad method handle kind at constant pool index %u in class file %s",
566 index, CHECK);
567 }
568 } // switch(refkind)
569 // Keep the ref_index unchanged. It will be indirected at link-time.
570 break;
571 } // case MethodHandle
572 case JVM_CONSTANT_MethodType: {
573 const int ref_index = cp->method_type_index_at(index);
574 check_property(valid_symbol_at(ref_index),
575 "Invalid constant pool index %u in class file %s",
576 ref_index, CHECK);
577 break;
578 }
579 case JVM_CONSTANT_InvokeDynamic: {
580 const int name_and_type_ref_index =
581 cp->invoke_dynamic_name_and_type_ref_index_at(index);
582
583 check_property(valid_cp_range(name_and_type_ref_index, length) &&
584 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
585 "Invalid constant pool index %u in class file %s",
586 name_and_type_ref_index, CHECK);
587 // bootstrap specifier index must be checked later,
588 // when BootstrapMethods attr is available
589 break;
590 }
591 default: {
592 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
593 ShouldNotReachHere();
594 break;
595 }
596 } // switch(tag)
597 } // end of for
598
599 _first_patched_klass_resolved_index = num_klasses;
600 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
601
602 if (_cp_patches != NULL) {
603 // need to treat this_class specially...
604
605 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
606 // for now. These will be replaced with actual names of the patched classes in patch_class().
607 Symbol* s = vmSymbols::star_name();
608 for (int n=_orig_cp_size; n<cp->length(); n++) {
609 cp->symbol_at_put(n, s);
610 }
611
612 int this_class_index;
613 {
614 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
615 const u1* const mark = stream->current();
616 stream->skip_u2_fast(1); // skip flags
617 this_class_index = stream->get_u2_fast();
618 stream->set_current(mark); // revert to mark
619 }
620
621 for (index = 1; index < length; index++) { // Index 0 is unused
622 if (has_cp_patch_at(index)) {
623 guarantee_property(index != this_class_index,
624 "Illegal constant pool patch to self at %d in class file %s",
625 index, CHECK);
626 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
627 }
628 }
629 }
630
631 if (!_need_verify) {
632 return;
633 }
634
635 // second verification pass - checks the strings are of the right format.
636 // but not yet to the other entries
637 for (index = 1; index < length; index++) {
638 const jbyte tag = cp->tag_at(index).value();
639 switch (tag) {
640 case JVM_CONSTANT_UnresolvedClass:
641 case JVM_CONSTANT_UnresolvedValue: {
642 const Symbol* const class_name = cp->klass_name_at(index);
643 // check the name, even if _cp_patches will overwrite it
644 verify_legal_class_name(class_name, CHECK);
645 break;
646 }
647 case JVM_CONSTANT_NameAndType: {
648 if (_need_verify) {
649 const int sig_index = cp->signature_ref_index_at(index);
650 const int name_index = cp->name_ref_index_at(index);
651 const Symbol* const name = cp->symbol_at(name_index);
652 const Symbol* const sig = cp->symbol_at(sig_index);
653 guarantee_property(sig->utf8_length() != 0,
654 "Illegal zero length constant pool entry at %d in class %s",
655 sig_index, CHECK);
656 guarantee_property(name->utf8_length() != 0,
657 "Illegal zero length constant pool entry at %d in class %s",
658 name_index, CHECK);
659
660 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
661 // Format check method name and signature
662 verify_legal_method_name(name, CHECK);
663 verify_legal_method_signature(name, sig, CHECK);
664 } else {
665 // Format check field name and signature
666 verify_legal_field_name(name, CHECK);
667 verify_legal_field_signature(name, sig, CHECK);
668 }
669 }
670 break;
671 }
672 case JVM_CONSTANT_InvokeDynamic:
673 case JVM_CONSTANT_Fieldref:
674 case JVM_CONSTANT_Methodref:
675 case JVM_CONSTANT_InterfaceMethodref: {
676 const int name_and_type_ref_index =
677 cp->name_and_type_ref_index_at(index);
678 // already verified to be utf8
679 const int name_ref_index =
680 cp->name_ref_index_at(name_and_type_ref_index);
681 // already verified to be utf8
682 const int signature_ref_index =
683 cp->signature_ref_index_at(name_and_type_ref_index);
684 const Symbol* const name = cp->symbol_at(name_ref_index);
685 const Symbol* const signature = cp->symbol_at(signature_ref_index);
686 if (tag == JVM_CONSTANT_Fieldref) {
687 if (_need_verify) {
688 // Field name and signature are verified above, when iterating NameAndType_info.
689 // Need only to be sure signature is non-zero length and the right type.
690 if (signature->utf8_length() == 0 ||
691 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
692 throwIllegalSignature("Field", name, signature, CHECK);
693 }
694 }
695 } else {
696 if (_need_verify) {
697 // Method name and signature are verified above, when iterating NameAndType_info.
698 // Need only to be sure signature is non-zero length and the right type.
699 if (signature->utf8_length() == 0 ||
700 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
701 throwIllegalSignature("Method", name, signature, CHECK);
702 }
703 }
704 // 4509014: If a class method name begins with '<', it must be "<init>"
705 const unsigned int name_len = name->utf8_length();
706 if (tag == JVM_CONSTANT_Methodref &&
707 name_len != 0 &&
708 name->byte_at(0) == '<' &&
709 name != vmSymbols::object_initializer_name()) {
710 classfile_parse_error(
711 "Bad method name at constant pool index %u in class file %s",
712 name_ref_index, CHECK);
713 }
714 }
715 break;
716 }
717 case JVM_CONSTANT_MethodHandle: {
718 const int ref_index = cp->method_handle_index_at(index);
719 const int ref_kind = cp->method_handle_ref_kind_at(index);
720 switch (ref_kind) {
721 case JVM_REF_invokeVirtual:
722 case JVM_REF_invokeStatic:
723 case JVM_REF_invokeSpecial:
724 case JVM_REF_newInvokeSpecial: {
725 const int name_and_type_ref_index =
726 cp->name_and_type_ref_index_at(ref_index);
727 const int name_ref_index =
728 cp->name_ref_index_at(name_and_type_ref_index);
729 const Symbol* const name = cp->symbol_at(name_ref_index);
730 if (ref_kind == JVM_REF_newInvokeSpecial) {
731 if (name != vmSymbols::object_initializer_name()) {
732 classfile_parse_error(
733 "Bad constructor name at constant pool index %u in class file %s",
734 name_ref_index, CHECK);
735 }
736 } else {
737 if (name == vmSymbols::object_initializer_name()) {
738 classfile_parse_error(
739 "Bad method name at constant pool index %u in class file %s",
740 name_ref_index, CHECK);
741 }
742 }
743 break;
744 }
745 // Other ref_kinds are already fully checked in previous pass.
746 } // switch(ref_kind)
747 break;
748 }
749 case JVM_CONSTANT_MethodType: {
750 const Symbol* const no_name = vmSymbols::type_name(); // place holder
751 const Symbol* const signature = cp->method_type_signature_at(index);
752 verify_legal_method_signature(no_name, signature, CHECK);
753 break;
754 }
755 case JVM_CONSTANT_Utf8: {
756 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
757 }
758 } // switch(tag)
759 } // end of for
760 }
761
762 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
763 int name_index = _orig_cp_size + _num_patched_klasses;
764 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
765
766 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
767 _num_patched_klasses ++;
768 }
769
770 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
771 int index,
772 Handle patch,
773 TRAPS) {
774 assert(cp != NULL, "invariant");
775
776 BasicType patch_type = T_VOID;
777
778 switch (cp->tag_at(index).value()) {
779
780 case JVM_CONSTANT_UnresolvedClass: {
781 // Patching a class means pre-resolving it.
782 // The name in the constant pool is ignored.
783 if (java_lang_Class::is_instance(patch())) {
784 guarantee_property(!java_lang_Class::is_primitive(patch()),
785 "Illegal class patch at %d in class file %s",
786 index, CHECK);
787 Klass* k = java_lang_Class::as_Klass(patch());
788 patch_class(cp, index, k, k->name());
789 } else {
790 guarantee_property(java_lang_String::is_instance(patch()),
791 "Illegal class patch at %d in class file %s",
792 index, CHECK);
793 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
794 patch_class(cp, index, NULL, name);
795 }
796 break;
797 }
798
799 case JVM_CONSTANT_String: {
800 // skip this patch and don't clear it. Needs the oop array for resolved
801 // references to be created first.
802 return;
803 }
804 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
805 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
806 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
807 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
808 patch_prim:
809 {
810 jvalue value;
811 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
812 guarantee_property(value_type == patch_type,
813 "Illegal primitive patch at %d in class file %s",
814 index, CHECK);
815 switch (value_type) {
816 case T_INT: cp->int_at_put(index, value.i); break;
817 case T_FLOAT: cp->float_at_put(index, value.f); break;
818 case T_LONG: cp->long_at_put(index, value.j); break;
819 case T_DOUBLE: cp->double_at_put(index, value.d); break;
820 default: assert(false, "");
821 }
822 } // end patch_prim label
823 break;
824
825 default: {
826 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
827 guarantee_property(!has_cp_patch_at(index),
828 "Illegal unexpected patch at %d in class file %s",
829 index, CHECK);
830 return;
831 }
832 } // end of switch(tag)
833
834 // On fall-through, mark the patch as used.
835 clear_cp_patch_at(index);
836 }
837 class NameSigHash: public ResourceObj {
838 public:
839 const Symbol* _name; // name
840 const Symbol* _sig; // signature
841 NameSigHash* _next; // Next entry in hash table
842 };
843
844 static const int HASH_ROW_SIZE = 256;
845
846 static unsigned int hash(const Symbol* name, const Symbol* sig) {
847 unsigned int raw_hash = 0;
848 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
849 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
850
851 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
852 }
853
854
855 static void initialize_hashtable(NameSigHash** table) {
856 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
857 }
858 // Return false if the name/sig combination is found in table.
859 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
860 // The old format checker uses heap sort to find duplicates.
861 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
862 // of table since we don't expect Symbol*'s to move.
863 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
864 assert(name != NULL, "name in constant pool is NULL");
865
866 // First lookup for duplicates
867 int index = hash(name, sig);
868 NameSigHash* entry = table[index];
869 while (entry != NULL) {
870 if (entry->_name == name && entry->_sig == sig) {
871 return false;
872 }
873 entry = entry->_next;
874 }
875
876 // No duplicate is found, allocate a new entry and fill it.
877 entry = new NameSigHash();
878 entry->_name = name;
879 entry->_sig = sig;
880
881 // Insert into hash table
882 entry->_next = table[index];
883 table[index] = entry;
884
885 return true;
886 }
887
888 // Side-effects: populates the _local_interfaces field
889 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
890 const int itfs_len,
891 ConstantPool* const cp,
892 bool* const has_nonstatic_concrete_methods,
893 TRAPS) {
894 assert(stream != NULL, "invariant");
895 assert(cp != NULL, "invariant");
896 assert(has_nonstatic_concrete_methods != NULL, "invariant");
897
898 if (itfs_len == 0) {
899 _local_interfaces = Universe::the_empty_klass_array();
900 } else {
901 assert(itfs_len > 0, "only called for len>0");
902 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
903
904 int index;
905 for (index = 0; index < itfs_len; index++) {
906 const u2 interface_index = stream->get_u2(CHECK);
907 Klass* interf;
908 check_property(
909 valid_klass_reference_at(interface_index),
910 "Interface name has bad constant pool index %u in class file %s",
911 interface_index, CHECK);
912 if (cp->tag_at(interface_index).is_klass()) {
913 interf = cp->resolved_klass_at(interface_index);
914 } else {
915 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
916
917 // Don't need to check legal name because it's checked when parsing constant pool.
918 // But need to make sure it's not an array type.
919 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
920 "Bad interface name in class file %s", CHECK);
921
922 // Call resolve_super so classcircularity is checked
923 interf = SystemDictionary::resolve_super_or_fail(
924 _class_name,
925 unresolved_klass,
926 Handle(THREAD, _loader_data->class_loader()),
927 _protection_domain,
928 false,
929 CHECK);
930 }
931
932 if (!interf->is_interface()) {
933 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
934 "Implementing class");
935 }
936
937 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
938 *has_nonstatic_concrete_methods = true;
939 }
940 _local_interfaces->at_put(index, interf);
941 }
942
943 if (!_need_verify || itfs_len <= 1) {
944 return;
945 }
946
947 // Check if there's any duplicates in interfaces
948 ResourceMark rm(THREAD);
949 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
950 NameSigHash*,
951 HASH_ROW_SIZE);
952 initialize_hashtable(interface_names);
953 bool dup = false;
954 const Symbol* name = NULL;
955 {
956 debug_only(NoSafepointVerifier nsv;)
957 for (index = 0; index < itfs_len; index++) {
958 const Klass* const k = _local_interfaces->at(index);
959 name = InstanceKlass::cast(k)->name();
960 // If no duplicates, add (name, NULL) in hashtable interface_names.
961 if (!put_after_lookup(name, NULL, interface_names)) {
962 dup = true;
963 break;
964 }
965 }
966 }
967 if (dup) {
968 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
969 name->as_C_string(), CHECK);
970 }
971 }
972 }
973
974 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
975 int constantvalue_index,
976 int signature_index,
977 TRAPS) const {
978 // Make sure the constant pool entry is of a type appropriate to this field
979 guarantee_property(
980 (constantvalue_index > 0 &&
981 constantvalue_index < cp->length()),
982 "Bad initial value index %u in ConstantValue attribute in class file %s",
983 constantvalue_index, CHECK);
984
985 const constantTag value_type = cp->tag_at(constantvalue_index);
986 switch(cp->basic_type_for_signature_at(signature_index)) {
987 case T_LONG: {
988 guarantee_property(value_type.is_long(),
989 "Inconsistent constant value type in class file %s",
990 CHECK);
991 break;
992 }
993 case T_FLOAT: {
994 guarantee_property(value_type.is_float(),
995 "Inconsistent constant value type in class file %s",
996 CHECK);
997 break;
998 }
999 case T_DOUBLE: {
1000 guarantee_property(value_type.is_double(),
1001 "Inconsistent constant value type in class file %s",
1002 CHECK);
1003 break;
1004 }
1005 case T_BYTE:
1006 case T_CHAR:
1007 case T_SHORT:
1008 case T_BOOLEAN:
1009 case T_INT: {
1010 guarantee_property(value_type.is_int(),
1011 "Inconsistent constant value type in class file %s",
1012 CHECK);
1013 break;
1014 }
1015 case T_OBJECT: {
1016 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1017 && value_type.is_string()),
1018 "Bad string initial value in class file %s",
1019 CHECK);
1020 break;
1021 }
1022 default: {
1023 classfile_parse_error("Unable to set initial value %u in class file %s",
1024 constantvalue_index,
1025 CHECK);
1026 }
1027 }
1028 }
1029
1030 class AnnotationCollector : public ResourceObj{
1031 public:
1032 enum Location { _in_field, _in_method, _in_class };
1033 enum ID {
1034 _unknown = 0,
1035 _method_CallerSensitive,
1036 _method_ForceInline,
1037 _method_DontInline,
1038 _method_InjectedProfile,
1039 _method_LambdaForm_Compiled,
1040 _method_LambdaForm_Hidden,
1041 _method_HotSpotIntrinsicCandidate,
1042 _jdk_internal_vm_annotation_Contended,
1043 _field_Stable,
1044 _jdk_internal_vm_annotation_ReservedStackAccess,
1045 _jvm_internal_value_ValueCapableClass,
1046 _annotation_LIMIT
1047 };
1048 const Location _location;
1049 int _annotations_present;
1050 u2 _contended_group;
1051
1052 AnnotationCollector(Location location)
1053 : _location(location), _annotations_present(0)
1054 {
1055 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1056 }
1057 // If this annotation name has an ID, report it (or _none).
1058 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1059 // Set the annotation name:
1060 void set_annotation(ID id) {
1061 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1062 _annotations_present |= nth_bit((int)id);
1063 }
1064
1065 void remove_annotation(ID id) {
1066 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1067 _annotations_present &= ~nth_bit((int)id);
1068 }
1069
1070 // Report if the annotation is present.
1071 bool has_any_annotations() const { return _annotations_present != 0; }
1072 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1073
1074 void set_contended_group(u2 group) { _contended_group = group; }
1075 u2 contended_group() const { return _contended_group; }
1076
1077 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1078
1079 void set_stable(bool stable) { set_annotation(_field_Stable); }
1080 bool is_stable() const { return has_annotation(_field_Stable); }
1081
1082 bool is_value_capable_class() const { return has_annotation(_jvm_internal_value_ValueCapableClass); }
1083 };
1084
1085 // This class also doubles as a holder for metadata cleanup.
1086 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1087 private:
1088 ClassLoaderData* _loader_data;
1089 AnnotationArray* _field_annotations;
1090 AnnotationArray* _field_type_annotations;
1091 public:
1092 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1093 AnnotationCollector(_in_field),
1094 _loader_data(loader_data),
1095 _field_annotations(NULL),
1096 _field_type_annotations(NULL) {}
1097 ~FieldAnnotationCollector();
1098 void apply_to(FieldInfo* f);
1099 AnnotationArray* field_annotations() { return _field_annotations; }
1100 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1101
1102 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1103 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1104 };
1105
1106 class MethodAnnotationCollector : public AnnotationCollector{
1107 public:
1108 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1109 void apply_to(const methodHandle& m);
1110 };
1111
1112 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1113 public:
1114 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1115 void apply_to(InstanceKlass* ik);
1116 };
1117
1118
1119 static int skip_annotation_value(const u1*, int, int); // fwd decl
1120
1121 // Safely increment index by val if does not pass limit
1122 #define SAFE_ADD(index, limit, val) \
1123 if (index >= limit - val) return limit; \
1124 index += val;
1125
1126 // Skip an annotation. Return >=limit if there is any problem.
1127 static int skip_annotation(const u1* buffer, int limit, int index) {
1128 assert(buffer != NULL, "invariant");
1129 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1130 // value := switch (tag:u1) { ... }
1131 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1132 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1133 while (--nmem >= 0 && index < limit) {
1134 SAFE_ADD(index, limit, 2); // skip member
1135 index = skip_annotation_value(buffer, limit, index);
1136 }
1137 return index;
1138 }
1139
1140 // Skip an annotation value. Return >=limit if there is any problem.
1141 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1142 assert(buffer != NULL, "invariant");
1143
1144 // value := switch (tag:u1) {
1145 // case B, C, I, S, Z, D, F, J, c: con:u2;
1146 // case e: e_class:u2 e_name:u2;
1147 // case s: s_con:u2;
1148 // case [: do(nval:u2) {value};
1149 // case @: annotation;
1150 // case s: s_con:u2;
1151 // }
1152 SAFE_ADD(index, limit, 1); // read tag
1153 const u1 tag = buffer[index - 1];
1154 switch (tag) {
1155 case 'B':
1156 case 'C':
1157 case 'I':
1158 case 'S':
1159 case 'Z':
1160 case 'D':
1161 case 'F':
1162 case 'J':
1163 case 'c':
1164 case 's':
1165 SAFE_ADD(index, limit, 2); // skip con or s_con
1166 break;
1167 case 'e':
1168 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1169 break;
1170 case '[':
1171 {
1172 SAFE_ADD(index, limit, 2); // read nval
1173 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1174 while (--nval >= 0 && index < limit) {
1175 index = skip_annotation_value(buffer, limit, index);
1176 }
1177 }
1178 break;
1179 case '@':
1180 index = skip_annotation(buffer, limit, index);
1181 break;
1182 default:
1183 return limit; // bad tag byte
1184 }
1185 return index;
1186 }
1187
1188 // Sift through annotations, looking for those significant to the VM:
1189 static void parse_annotations(const ConstantPool* const cp,
1190 const u1* buffer, int limit,
1191 AnnotationCollector* coll,
1192 ClassLoaderData* loader_data,
1193 TRAPS) {
1194
1195 assert(cp != NULL, "invariant");
1196 assert(buffer != NULL, "invariant");
1197 assert(coll != NULL, "invariant");
1198 assert(loader_data != NULL, "invariant");
1199
1200 // annotations := do(nann:u2) {annotation}
1201 int index = 2; // read nann
1202 if (index >= limit) return;
1203 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1204 enum { // initial annotation layout
1205 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1206 count_off = 2, // u2 such as 1 (one value)
1207 member_off = 4, // utf8 such as 'value'
1208 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1209 e_tag_val = 'e',
1210 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1211 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1212 e_size = 11, // end of 'e' annotation
1213 c_tag_val = 'c', // payload is type
1214 c_con_off = 7, // utf8 payload, such as 'I'
1215 c_size = 9, // end of 'c' annotation
1216 s_tag_val = 's', // payload is String
1217 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1218 s_size = 9,
1219 min_size = 6 // smallest possible size (zero members)
1220 };
1221 // Cannot add min_size to index in case of overflow MAX_INT
1222 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1223 int index0 = index;
1224 index = skip_annotation(buffer, limit, index);
1225 const u1* const abase = buffer + index0;
1226 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1227 const int count = Bytes::get_Java_u2((address)abase + count_off);
1228 const Symbol* const aname = check_symbol_at(cp, atype);
1229 if (aname == NULL) break; // invalid annotation name
1230 const Symbol* member = NULL;
1231 if (count >= 1) {
1232 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1233 member = check_symbol_at(cp, member_index);
1234 if (member == NULL) break; // invalid member name
1235 }
1236
1237 // Here is where parsing particular annotations will take place.
1238 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1239 if (AnnotationCollector::_unknown == id) continue;
1240 coll->set_annotation(id);
1241
1242 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1243 // @Contended can optionally specify the contention group.
1244 //
1245 // Contended group defines the equivalence class over the fields:
1246 // the fields within the same contended group are not treated distinct.
1247 // The only exception is default group, which does not incur the
1248 // equivalence. Naturally, contention group for classes is meaningless.
1249 //
1250 // While the contention group is specified as String, annotation
1251 // values are already interned, and we might as well use the constant
1252 // pool index as the group tag.
1253 //
1254 u2 group_index = 0; // default contended group
1255 if (count == 1
1256 && s_size == (index - index0) // match size
1257 && s_tag_val == *(abase + tag_off)
1258 && member == vmSymbols::value_name()) {
1259 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1260 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1261 group_index = 0; // default contended group
1262 }
1263 }
1264 coll->set_contended_group(group_index);
1265 }
1266 }
1267 }
1268
1269
1270 // Parse attributes for a field.
1271 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1272 u2 attributes_count,
1273 bool is_static, u2 signature_index,
1274 u2* const constantvalue_index_addr,
1275 bool* const is_synthetic_addr,
1276 u2* const generic_signature_index_addr,
1277 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1278 TRAPS) {
1279 assert(cfs != NULL, "invariant");
1280 assert(constantvalue_index_addr != NULL, "invariant");
1281 assert(is_synthetic_addr != NULL, "invariant");
1282 assert(generic_signature_index_addr != NULL, "invariant");
1283 assert(parsed_annotations != NULL, "invariant");
1284 assert(attributes_count > 0, "attributes_count should be greater than 0");
1285
1286 u2 constantvalue_index = 0;
1287 u2 generic_signature_index = 0;
1288 bool is_synthetic = false;
1289 const u1* runtime_visible_annotations = NULL;
1290 int runtime_visible_annotations_length = 0;
1291 const u1* runtime_invisible_annotations = NULL;
1292 int runtime_invisible_annotations_length = 0;
1293 const u1* runtime_visible_type_annotations = NULL;
1294 int runtime_visible_type_annotations_length = 0;
1295 const u1* runtime_invisible_type_annotations = NULL;
1296 int runtime_invisible_type_annotations_length = 0;
1297 bool runtime_invisible_annotations_exists = false;
1298 bool runtime_invisible_type_annotations_exists = false;
1299 const ConstantPool* const cp = _cp;
1300
1301 while (attributes_count--) {
1302 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1303 const u2 attribute_name_index = cfs->get_u2_fast();
1304 const u4 attribute_length = cfs->get_u4_fast();
1305 check_property(valid_symbol_at(attribute_name_index),
1306 "Invalid field attribute index %u in class file %s",
1307 attribute_name_index,
1308 CHECK);
1309
1310 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1311 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1312 // ignore if non-static
1313 if (constantvalue_index != 0) {
1314 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1315 }
1316 check_property(
1317 attribute_length == 2,
1318 "Invalid ConstantValue field attribute length %u in class file %s",
1319 attribute_length, CHECK);
1320
1321 constantvalue_index = cfs->get_u2(CHECK);
1322 if (_need_verify) {
1323 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1324 }
1325 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1326 if (attribute_length != 0) {
1327 classfile_parse_error(
1328 "Invalid Synthetic field attribute length %u in class file %s",
1329 attribute_length, CHECK);
1330 }
1331 is_synthetic = true;
1332 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1333 if (attribute_length != 0) {
1334 classfile_parse_error(
1335 "Invalid Deprecated field attribute length %u in class file %s",
1336 attribute_length, CHECK);
1337 }
1338 } else if (_major_version >= JAVA_1_5_VERSION) {
1339 if (attribute_name == vmSymbols::tag_signature()) {
1340 if (generic_signature_index != 0) {
1341 classfile_parse_error(
1342 "Multiple Signature attributes for field in class file %s", CHECK);
1343 }
1344 if (attribute_length != 2) {
1345 classfile_parse_error(
1346 "Wrong size %u for field's Signature attribute in class file %s",
1347 attribute_length, CHECK);
1348 }
1349 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1350 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1351 if (runtime_visible_annotations != NULL) {
1352 classfile_parse_error(
1353 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1354 }
1355 runtime_visible_annotations_length = attribute_length;
1356 runtime_visible_annotations = cfs->current();
1357 assert(runtime_visible_annotations != NULL, "null visible annotations");
1358 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1359 parse_annotations(cp,
1360 runtime_visible_annotations,
1361 runtime_visible_annotations_length,
1362 parsed_annotations,
1363 _loader_data,
1364 CHECK);
1365 cfs->skip_u1_fast(runtime_visible_annotations_length);
1366 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1367 if (runtime_invisible_annotations_exists) {
1368 classfile_parse_error(
1369 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1370 }
1371 runtime_invisible_annotations_exists = true;
1372 if (PreserveAllAnnotations) {
1373 runtime_invisible_annotations_length = attribute_length;
1374 runtime_invisible_annotations = cfs->current();
1375 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1376 }
1377 cfs->skip_u1(attribute_length, CHECK);
1378 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1379 if (runtime_visible_type_annotations != NULL) {
1380 classfile_parse_error(
1381 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1382 }
1383 runtime_visible_type_annotations_length = attribute_length;
1384 runtime_visible_type_annotations = cfs->current();
1385 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1386 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1387 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1388 if (runtime_invisible_type_annotations_exists) {
1389 classfile_parse_error(
1390 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1391 } else {
1392 runtime_invisible_type_annotations_exists = true;
1393 }
1394 if (PreserveAllAnnotations) {
1395 runtime_invisible_type_annotations_length = attribute_length;
1396 runtime_invisible_type_annotations = cfs->current();
1397 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1398 }
1399 cfs->skip_u1(attribute_length, CHECK);
1400 } else {
1401 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1402 }
1403 } else {
1404 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1405 }
1406 }
1407
1408 *constantvalue_index_addr = constantvalue_index;
1409 *is_synthetic_addr = is_synthetic;
1410 *generic_signature_index_addr = generic_signature_index;
1411 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1412 runtime_visible_annotations_length,
1413 runtime_invisible_annotations,
1414 runtime_invisible_annotations_length,
1415 CHECK);
1416 parsed_annotations->set_field_annotations(a);
1417 a = assemble_annotations(runtime_visible_type_annotations,
1418 runtime_visible_type_annotations_length,
1419 runtime_invisible_type_annotations,
1420 runtime_invisible_type_annotations_length,
1421 CHECK);
1422 parsed_annotations->set_field_type_annotations(a);
1423 return;
1424 }
1425
1426
1427 // Field allocation types. Used for computing field offsets.
1428
1429 enum FieldAllocationType {
1430 STATIC_OOP, // Oops
1431 STATIC_BYTE, // Boolean, Byte, char
1432 STATIC_SHORT, // shorts
1433 STATIC_WORD, // ints
1434 STATIC_DOUBLE, // aligned long or double
1435 STATIC_VALUETYPE, // Value types
1436 NONSTATIC_OOP,
1437 NONSTATIC_BYTE,
1438 NONSTATIC_SHORT,
1439 NONSTATIC_WORD,
1440 NONSTATIC_DOUBLE,
1441 NONSTATIC_VALUETYPE,
1442 MAX_FIELD_ALLOCATION_TYPE,
1443 BAD_ALLOCATION_TYPE = -1
1444 };
1445
1446 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1447 BAD_ALLOCATION_TYPE, // 0
1448 BAD_ALLOCATION_TYPE, // 1
1449 BAD_ALLOCATION_TYPE, // 2
1450 BAD_ALLOCATION_TYPE, // 3
1451 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1452 NONSTATIC_SHORT, // T_CHAR = 5,
1453 NONSTATIC_WORD, // T_FLOAT = 6,
1454 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1455 NONSTATIC_BYTE, // T_BYTE = 8,
1456 NONSTATIC_SHORT, // T_SHORT = 9,
1457 NONSTATIC_WORD, // T_INT = 10,
1458 NONSTATIC_DOUBLE, // T_LONG = 11,
1459 NONSTATIC_OOP, // T_OBJECT = 12,
1460 NONSTATIC_OOP, // T_ARRAY = 13,
1461 NONSTATIC_VALUETYPE, // T_VALUETYPE = 14,
1462 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1463 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1464 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1465 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1466 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1467 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1468 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1469 BAD_ALLOCATION_TYPE, // 0
1470 BAD_ALLOCATION_TYPE, // 1
1471 BAD_ALLOCATION_TYPE, // 2
1472 BAD_ALLOCATION_TYPE, // 3
1473 STATIC_BYTE , // T_BOOLEAN = 4,
1474 STATIC_SHORT, // T_CHAR = 5,
1475 STATIC_WORD, // T_FLOAT = 6,
1476 STATIC_DOUBLE, // T_DOUBLE = 7,
1477 STATIC_BYTE, // T_BYTE = 8,
1478 STATIC_SHORT, // T_SHORT = 9,
1479 STATIC_WORD, // T_INT = 10,
1480 STATIC_DOUBLE, // T_LONG = 11,
1481 STATIC_OOP, // T_OBJECT = 12,
1482 STATIC_OOP, // T_ARRAY = 13,
1483 STATIC_VALUETYPE, // T_VALUETYPE = 14,
1484 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1485 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1486 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1487 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1488 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1489 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1490 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1491 };
1492
1493 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1494 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1495 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1496 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1497 return result;
1498 }
1499
1500 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1501 public:
1502 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1503
1504 FieldAllocationCount() {
1505 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1506 count[i] = 0;
1507 }
1508 }
1509
1510 FieldAllocationType update(bool is_static, BasicType type) {
1511 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1512 if (atype != BAD_ALLOCATION_TYPE) {
1513 // Make sure there is no overflow with injected fields.
1514 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1515 count[atype]++;
1516 }
1517 return atype;
1518 }
1519 };
1520
1521 // Side-effects: populates the _fields, _fields_annotations,
1522 // _fields_type_annotations fields
1523 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1524 bool is_interface,
1525 FieldAllocationCount* const fac,
1526 ConstantPool* cp,
1527 const int cp_size,
1528 u2* const java_fields_count_ptr,
1529 TRAPS) {
1530
1531 assert(cfs != NULL, "invariant");
1532 assert(fac != NULL, "invariant");
1533 assert(cp != NULL, "invariant");
1534 assert(java_fields_count_ptr != NULL, "invariant");
1535
1536 assert(NULL == _fields, "invariant");
1537 assert(NULL == _fields_annotations, "invariant");
1538 assert(NULL == _fields_type_annotations, "invariant");
1539
1540 cfs->guarantee_more(2, CHECK); // length
1541 const u2 length = cfs->get_u2_fast();
1542 *java_fields_count_ptr = length;
1543
1544 int num_injected = 0;
1545 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1546 &num_injected);
1547 const int total_fields = length + num_injected;
1548
1549 // The field array starts with tuples of shorts
1550 // [access, name index, sig index, initial value index, byte offset].
1551 // A generic signature slot only exists for field with generic
1552 // signature attribute. And the access flag is set with
1553 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1554 // signature slots are at the end of the field array and after all
1555 // other fields data.
1556 //
1557 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1558 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1559 // ...
1560 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1561 // [generic signature index]
1562 // [generic signature index]
1563 // ...
1564 //
1565 // Allocate a temporary resource array for field data. For each field,
1566 // a slot is reserved in the temporary array for the generic signature
1567 // index. After parsing all fields, the data are copied to a permanent
1568 // array and any unused slots will be discarded.
1569 ResourceMark rm(THREAD);
1570 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1571 u2,
1572 total_fields * (FieldInfo::field_slots + 1));
1573
1574 // The generic signature slots start after all other fields' data.
1575 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1576 int num_generic_signature = 0;
1577 for (int n = 0; n < length; n++) {
1578 // access_flags, name_index, descriptor_index, attributes_count
1579 cfs->guarantee_more(8, CHECK);
1580
1581 AccessFlags access_flags;
1582 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1583 verify_legal_field_modifiers(flags, is_interface, CHECK);
1584 access_flags.set_flags(flags);
1585
1586 const u2 name_index = cfs->get_u2_fast();
1587 check_property(valid_symbol_at(name_index),
1588 "Invalid constant pool index %u for field name in class file %s",
1589 name_index, CHECK);
1590 const Symbol* const name = cp->symbol_at(name_index);
1591 verify_legal_field_name(name, CHECK);
1592
1593 const u2 signature_index = cfs->get_u2_fast();
1594 check_property(valid_symbol_at(signature_index),
1595 "Invalid constant pool index %u for field signature in class file %s",
1596 signature_index, CHECK);
1597 const Symbol* const sig = cp->symbol_at(signature_index);
1598 verify_legal_field_signature(name, sig, CHECK);
1599 if (sig->starts_with("Q")) {
1600 _has_value_fields = true;
1601 }
1602
1603 u2 constantvalue_index = 0;
1604 bool is_synthetic = false;
1605 u2 generic_signature_index = 0;
1606 const bool is_static = access_flags.is_static();
1607 FieldAnnotationCollector parsed_annotations(_loader_data);
1608
1609 const u2 attributes_count = cfs->get_u2_fast();
1610 if (attributes_count > 0) {
1611 parse_field_attributes(cfs,
1612 attributes_count,
1613 is_static,
1614 signature_index,
1615 &constantvalue_index,
1616 &is_synthetic,
1617 &generic_signature_index,
1618 &parsed_annotations,
1619 CHECK);
1620
1621 if (parsed_annotations.field_annotations() != NULL) {
1622 if (_fields_annotations == NULL) {
1623 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1624 _loader_data, length, NULL,
1625 CHECK);
1626 }
1627 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1628 parsed_annotations.set_field_annotations(NULL);
1629 }
1630 if (parsed_annotations.field_type_annotations() != NULL) {
1631 if (_fields_type_annotations == NULL) {
1632 _fields_type_annotations =
1633 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1634 length,
1635 NULL,
1636 CHECK);
1637 }
1638 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1639 parsed_annotations.set_field_type_annotations(NULL);
1640 }
1641
1642 if (is_synthetic) {
1643 access_flags.set_is_synthetic();
1644 }
1645 if (generic_signature_index != 0) {
1646 access_flags.set_field_has_generic_signature();
1647 fa[generic_signature_slot] = generic_signature_index;
1648 generic_signature_slot ++;
1649 num_generic_signature ++;
1650 }
1651 }
1652
1653 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1654 field->initialize(access_flags.as_short(),
1655 name_index,
1656 signature_index,
1657 constantvalue_index);
1658 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1659
1660 // Remember how many oops we encountered and compute allocation type
1661 const FieldAllocationType atype = fac->update(is_static, type);
1662 field->set_allocation_type(atype);
1663
1664 // After field is initialized with type, we can augment it with aux info
1665 if (parsed_annotations.has_any_annotations())
1666 parsed_annotations.apply_to(field);
1667 }
1668
1669 int index = length;
1670 if (num_injected != 0) {
1671 for (int n = 0; n < num_injected; n++) {
1672 // Check for duplicates
1673 if (injected[n].may_be_java) {
1674 const Symbol* const name = injected[n].name();
1675 const Symbol* const signature = injected[n].signature();
1676 bool duplicate = false;
1677 for (int i = 0; i < length; i++) {
1678 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1679 if (name == cp->symbol_at(f->name_index()) &&
1680 signature == cp->symbol_at(f->signature_index())) {
1681 // Symbol is desclared in Java so skip this one
1682 duplicate = true;
1683 break;
1684 }
1685 }
1686 if (duplicate) {
1687 // These will be removed from the field array at the end
1688 continue;
1689 }
1690 }
1691
1692 // Injected field
1693 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1694 field->initialize(JVM_ACC_FIELD_INTERNAL,
1695 injected[n].name_index,
1696 injected[n].signature_index,
1697 0);
1698
1699 const BasicType type = FieldType::basic_type(injected[n].signature());
1700
1701 // Remember how many oops we encountered and compute allocation type
1702 const FieldAllocationType atype = fac->update(false, type);
1703 field->set_allocation_type(atype);
1704 index++;
1705 }
1706 }
1707
1708 assert(NULL == _fields, "invariant");
1709
1710 _fields =
1711 MetadataFactory::new_array<u2>(_loader_data,
1712 index * FieldInfo::field_slots + num_generic_signature,
1713 CHECK);
1714 // Sometimes injected fields already exist in the Java source so
1715 // the fields array could be too long. In that case the
1716 // fields array is trimed. Also unused slots that were reserved
1717 // for generic signature indexes are discarded.
1718 {
1719 int i = 0;
1720 for (; i < index * FieldInfo::field_slots; i++) {
1721 _fields->at_put(i, fa[i]);
1722 }
1723 for (int j = total_fields * FieldInfo::field_slots;
1724 j < generic_signature_slot; j++) {
1725 _fields->at_put(i++, fa[j]);
1726 }
1727 assert(_fields->length() == i, "");
1728 }
1729
1730 if (_need_verify && length > 1) {
1731 // Check duplicated fields
1732 ResourceMark rm(THREAD);
1733 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1734 THREAD, NameSigHash*, HASH_ROW_SIZE);
1735 initialize_hashtable(names_and_sigs);
1736 bool dup = false;
1737 const Symbol* name = NULL;
1738 const Symbol* sig = NULL;
1739 {
1740 debug_only(NoSafepointVerifier nsv;)
1741 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1742 name = fs.name();
1743 sig = fs.signature();
1744 // If no duplicates, add name/signature in hashtable names_and_sigs.
1745 if (!put_after_lookup(name, sig, names_and_sigs)) {
1746 dup = true;
1747 break;
1748 }
1749 }
1750 }
1751 if (dup) {
1752 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1753 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1754 }
1755 }
1756 }
1757
1758
1759 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1760 u4 code_length,
1761 u4 exception_table_length,
1762 TRAPS) {
1763 assert(cfs != NULL, "invariant");
1764
1765 const unsafe_u2* const exception_table_start = cfs->current();
1766 assert(exception_table_start != NULL, "null exception table");
1767
1768 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1769 // end_pc,
1770 // handler_pc,
1771 // catch_type_index
1772
1773 // Will check legal target after parsing code array in verifier.
1774 if (_need_verify) {
1775 for (unsigned int i = 0; i < exception_table_length; i++) {
1776 const u2 start_pc = cfs->get_u2_fast();
1777 const u2 end_pc = cfs->get_u2_fast();
1778 const u2 handler_pc = cfs->get_u2_fast();
1779 const u2 catch_type_index = cfs->get_u2_fast();
1780 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1781 "Illegal exception table range in class file %s",
1782 CHECK_NULL);
1783 guarantee_property(handler_pc < code_length,
1784 "Illegal exception table handler in class file %s",
1785 CHECK_NULL);
1786 if (catch_type_index != 0) {
1787 guarantee_property(valid_klass_reference_at(catch_type_index),
1788 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1789 }
1790 }
1791 } else {
1792 cfs->skip_u2_fast(exception_table_length * 4);
1793 }
1794 return exception_table_start;
1795 }
1796
1797 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1798 u4 code_length,
1799 CompressedLineNumberWriteStream**const write_stream,
1800 TRAPS) {
1801
1802 const ClassFileStream* const cfs = _stream;
1803 unsigned int num_entries = cfs->get_u2(CHECK);
1804
1805 // Each entry is a u2 start_pc, and a u2 line_number
1806 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1807
1808 // Verify line number attribute and table length
1809 check_property(
1810 code_attribute_length == sizeof(u2) + length_in_bytes,
1811 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1812
1813 cfs->guarantee_more(length_in_bytes, CHECK);
1814
1815 if ((*write_stream) == NULL) {
1816 if (length_in_bytes > fixed_buffer_size) {
1817 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1818 } else {
1819 (*write_stream) = new CompressedLineNumberWriteStream(
1820 _linenumbertable_buffer, fixed_buffer_size);
1821 }
1822 }
1823
1824 while (num_entries-- > 0) {
1825 const u2 bci = cfs->get_u2_fast(); // start_pc
1826 const u2 line = cfs->get_u2_fast(); // line_number
1827 guarantee_property(bci < code_length,
1828 "Invalid pc in LineNumberTable in class file %s", CHECK);
1829 (*write_stream)->write_pair(bci, line);
1830 }
1831 }
1832
1833
1834 class LVT_Hash : public AllStatic {
1835 public:
1836
1837 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1838 /*
1839 * 3-tuple start_bci/length/slot has to be unique key,
1840 * so the following comparison seems to be redundant:
1841 * && elem->name_cp_index == entry->_elem->name_cp_index
1842 */
1843 return (e0.start_bci == e1.start_bci &&
1844 e0.length == e1.length &&
1845 e0.name_cp_index == e1.name_cp_index &&
1846 e0.slot == e1.slot);
1847 }
1848
1849 static unsigned int hash(LocalVariableTableElement const& e0) {
1850 unsigned int raw_hash = e0.start_bci;
1851
1852 raw_hash = e0.length + raw_hash * 37;
1853 raw_hash = e0.name_cp_index + raw_hash * 37;
1854 raw_hash = e0.slot + raw_hash * 37;
1855
1856 return raw_hash;
1857 }
1858 };
1859
1860
1861 // Class file LocalVariableTable elements.
1862 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1863 public:
1864 u2 start_bci;
1865 u2 length;
1866 u2 name_cp_index;
1867 u2 descriptor_cp_index;
1868 u2 slot;
1869 };
1870
1871 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1872 LocalVariableTableElement* const lvt) {
1873 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1874 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1875 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1876 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1877 lvt->signature_cp_index = 0;
1878 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1879 }
1880
1881 // Function is used to parse both attributes:
1882 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1883 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1884 u4 code_length,
1885 u2 max_locals,
1886 u4 code_attribute_length,
1887 u2* const localvariable_table_length,
1888 bool isLVTT,
1889 TRAPS) {
1890 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1891 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1892 const unsigned int size =
1893 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1894
1895 const ConstantPool* const cp = _cp;
1896
1897 // Verify local variable table attribute has right length
1898 if (_need_verify) {
1899 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1900 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1901 }
1902
1903 const unsafe_u2* const localvariable_table_start = cfs->current();
1904 assert(localvariable_table_start != NULL, "null local variable table");
1905 if (!_need_verify) {
1906 cfs->skip_u2_fast(size);
1907 } else {
1908 cfs->guarantee_more(size * 2, CHECK_NULL);
1909 for(int i = 0; i < (*localvariable_table_length); i++) {
1910 const u2 start_pc = cfs->get_u2_fast();
1911 const u2 length = cfs->get_u2_fast();
1912 const u2 name_index = cfs->get_u2_fast();
1913 const u2 descriptor_index = cfs->get_u2_fast();
1914 const u2 index = cfs->get_u2_fast();
1915 // Assign to a u4 to avoid overflow
1916 const u4 end_pc = (u4)start_pc + (u4)length;
1917
1918 if (start_pc >= code_length) {
1919 classfile_parse_error(
1920 "Invalid start_pc %u in %s in class file %s",
1921 start_pc, tbl_name, CHECK_NULL);
1922 }
1923 if (end_pc > code_length) {
1924 classfile_parse_error(
1925 "Invalid length %u in %s in class file %s",
1926 length, tbl_name, CHECK_NULL);
1927 }
1928 const int cp_size = cp->length();
1929 guarantee_property(valid_symbol_at(name_index),
1930 "Name index %u in %s has bad constant type in class file %s",
1931 name_index, tbl_name, CHECK_NULL);
1932 guarantee_property(valid_symbol_at(descriptor_index),
1933 "Signature index %u in %s has bad constant type in class file %s",
1934 descriptor_index, tbl_name, CHECK_NULL);
1935
1936 const Symbol* const name = cp->symbol_at(name_index);
1937 const Symbol* const sig = cp->symbol_at(descriptor_index);
1938 verify_legal_field_name(name, CHECK_NULL);
1939 u2 extra_slot = 0;
1940 if (!isLVTT) {
1941 verify_legal_field_signature(name, sig, CHECK_NULL);
1942
1943 // 4894874: check special cases for double and long local variables
1944 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1945 sig == vmSymbols::type_signature(T_LONG)) {
1946 extra_slot = 1;
1947 }
1948 }
1949 guarantee_property((index + extra_slot) < max_locals,
1950 "Invalid index %u in %s in class file %s",
1951 index, tbl_name, CHECK_NULL);
1952 }
1953 }
1954 return localvariable_table_start;
1955 }
1956
1957
1958 void ClassFileParser::parse_type_array(u2 array_length,
1959 u4 code_length,
1960 u4* const u1_index,
1961 u4* const u2_index,
1962 u1* const u1_array,
1963 u2* const u2_array,
1964 TRAPS) {
1965 const ClassFileStream* const cfs = _stream;
1966 u2 index = 0; // index in the array with long/double occupying two slots
1967 u4 i1 = *u1_index;
1968 u4 i2 = *u2_index + 1;
1969 for(int i = 0; i < array_length; i++) {
1970 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1971 index++;
1972 if (tag == ITEM_Long || tag == ITEM_Double) {
1973 index++;
1974 } else if (tag == ITEM_Object) {
1975 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1976 guarantee_property(valid_klass_reference_at(class_index),
1977 "Bad class index %u in StackMap in class file %s",
1978 class_index, CHECK);
1979 } else if (tag == ITEM_Uninitialized) {
1980 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1981 guarantee_property(
1982 offset < code_length,
1983 "Bad uninitialized type offset %u in StackMap in class file %s",
1984 offset, CHECK);
1985 } else {
1986 guarantee_property(
1987 tag <= (u1)ITEM_Uninitialized,
1988 "Unknown variable type %u in StackMap in class file %s",
1989 tag, CHECK);
1990 }
1991 }
1992 u2_array[*u2_index] = index;
1993 *u1_index = i1;
1994 *u2_index = i2;
1995 }
1996
1997 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1998 u4 code_attribute_length,
1999 bool need_verify,
2000 TRAPS) {
2001 assert(cfs != NULL, "invariant");
2002
2003 if (0 == code_attribute_length) {
2004 return NULL;
2005 }
2006
2007 const u1* const stackmap_table_start = cfs->current();
2008 assert(stackmap_table_start != NULL, "null stackmap table");
2009
2010 // check code_attribute_length first
2011 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2012
2013 if (!need_verify && !DumpSharedSpaces) {
2014 return NULL;
2015 }
2016 return stackmap_table_start;
2017 }
2018
2019 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2020 u2* const checked_exceptions_length,
2021 u4 method_attribute_length,
2022 TRAPS) {
2023 assert(cfs != NULL, "invariant");
2024 assert(checked_exceptions_length != NULL, "invariant");
2025
2026 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2027 *checked_exceptions_length = cfs->get_u2_fast();
2028 const unsigned int size =
2029 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2030 const unsafe_u2* const checked_exceptions_start = cfs->current();
2031 assert(checked_exceptions_start != NULL, "null checked exceptions");
2032 if (!_need_verify) {
2033 cfs->skip_u2_fast(size);
2034 } else {
2035 // Verify each value in the checked exception table
2036 u2 checked_exception;
2037 const u2 len = *checked_exceptions_length;
2038 cfs->guarantee_more(2 * len, CHECK_NULL);
2039 for (int i = 0; i < len; i++) {
2040 checked_exception = cfs->get_u2_fast();
2041 check_property(
2042 valid_klass_reference_at(checked_exception),
2043 "Exception name has bad type at constant pool %u in class file %s",
2044 checked_exception, CHECK_NULL);
2045 }
2046 }
2047 // check exceptions attribute length
2048 if (_need_verify) {
2049 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2050 sizeof(u2) * size),
2051 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2052 }
2053 return checked_exceptions_start;
2054 }
2055
2056 void ClassFileParser::throwIllegalSignature(const char* type,
2057 const Symbol* name,
2058 const Symbol* sig,
2059 TRAPS) const {
2060 assert(name != NULL, "invariant");
2061 assert(sig != NULL, "invariant");
2062
2063 ResourceMark rm(THREAD);
2064 Exceptions::fthrow(THREAD_AND_LOCATION,
2065 vmSymbols::java_lang_ClassFormatError(),
2066 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2067 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2068 }
2069
2070 AnnotationCollector::ID
2071 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2072 const Symbol* name) {
2073 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2074 // Privileged code can use all annotations. Other code silently drops some.
2075 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2076 loader_data->is_platform_class_loader_data() ||
2077 loader_data->is_anonymous();
2078 switch (sid) {
2079 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2080 if (_location != _in_method) break; // only allow for methods
2081 if (!privileged) break; // only allow in privileged code
2082 return _method_CallerSensitive;
2083 }
2084 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2085 if (_location != _in_method) break; // only allow for methods
2086 if (!privileged) break; // only allow in privileged code
2087 return _method_ForceInline;
2088 }
2089 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2090 if (_location != _in_method) break; // only allow for methods
2091 if (!privileged) break; // only allow in privileged code
2092 return _method_DontInline;
2093 }
2094 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2095 if (_location != _in_method) break; // only allow for methods
2096 if (!privileged) break; // only allow in privileged code
2097 return _method_InjectedProfile;
2098 }
2099 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2100 if (_location != _in_method) break; // only allow for methods
2101 if (!privileged) break; // only allow in privileged code
2102 return _method_LambdaForm_Compiled;
2103 }
2104 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2105 if (_location != _in_method) break; // only allow for methods
2106 if (!privileged) break; // only allow in privileged code
2107 return _method_LambdaForm_Hidden;
2108 }
2109 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2110 if (_location != _in_method) break; // only allow for methods
2111 if (!privileged) break; // only allow in privileged code
2112 return _method_HotSpotIntrinsicCandidate;
2113 }
2114 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2115 if (_location != _in_field) break; // only allow for fields
2116 if (!privileged) break; // only allow in privileged code
2117 return _field_Stable;
2118 }
2119 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2120 if (_location != _in_field && _location != _in_class) {
2121 break; // only allow for fields and classes
2122 }
2123 if (!EnableContended || (RestrictContended && !privileged)) {
2124 break; // honor privileges
2125 }
2126 return _jdk_internal_vm_annotation_Contended;
2127 }
2128 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2129 if (_location != _in_method) break; // only allow for methods
2130 if (RestrictReservedStack && !privileged) break; // honor privileges
2131 return _jdk_internal_vm_annotation_ReservedStackAccess;
2132 }
2133 case vmSymbols::VM_SYMBOL_ENUM_NAME(jvm_internal_value_ValueCapableClass_signature) : {
2134 if (_location != _in_class) {
2135 break;
2136 }
2137 return _jvm_internal_value_ValueCapableClass;
2138 }
2139 default: {
2140 break;
2141 }
2142 }
2143 return AnnotationCollector::_unknown;
2144 }
2145
2146 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2147 if (is_contended())
2148 f->set_contended_group(contended_group());
2149 if (is_stable())
2150 f->set_stable(true);
2151 }
2152
2153 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2154 // If there's an error deallocate metadata for field annotations
2155 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2156 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2157 }
2158
2159 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2160 if (has_annotation(_method_CallerSensitive))
2161 m->set_caller_sensitive(true);
2162 if (has_annotation(_method_ForceInline))
2163 m->set_force_inline(true);
2164 if (has_annotation(_method_DontInline))
2165 m->set_dont_inline(true);
2166 if (has_annotation(_method_InjectedProfile))
2167 m->set_has_injected_profile(true);
2168 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2169 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2170 if (has_annotation(_method_LambdaForm_Hidden))
2171 m->set_hidden(true);
2172 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2173 m->set_intrinsic_candidate(true);
2174 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2175 m->set_has_reserved_stack_access(true);
2176 }
2177
2178 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2179 assert(ik != NULL, "invariant");
2180 ik->set_is_contended(is_contended());
2181 }
2182
2183 #define MAX_ARGS_SIZE 255
2184 #define MAX_CODE_SIZE 65535
2185 #define INITIAL_MAX_LVT_NUMBER 256
2186
2187 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2188 *
2189 * Rules for LVT's and LVTT's are:
2190 * - There can be any number of LVT's and LVTT's.
2191 * - If there are n LVT's, it is the same as if there was just
2192 * one LVT containing all the entries from the n LVT's.
2193 * - There may be no more than one LVT entry per local variable.
2194 * Two LVT entries are 'equal' if these fields are the same:
2195 * start_pc, length, name, slot
2196 * - There may be no more than one LVTT entry per each LVT entry.
2197 * Each LVTT entry has to match some LVT entry.
2198 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2199 */
2200 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2201 int lvt_cnt,
2202 u2* const localvariable_table_length,
2203 const unsafe_u2** const localvariable_table_start,
2204 int lvtt_cnt,
2205 u2* const localvariable_type_table_length,
2206 const unsafe_u2** const localvariable_type_table_start,
2207 TRAPS) {
2208
2209 ResourceMark rm(THREAD);
2210
2211 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2212 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2213
2214 LVT_HashTable* const table = new LVT_HashTable();
2215
2216 // To fill LocalVariableTable in
2217 const Classfile_LVT_Element* cf_lvt;
2218 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2219
2220 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2221 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2222 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2223 copy_lvt_element(&cf_lvt[idx], lvt);
2224 // If no duplicates, add LVT elem in hashtable.
2225 if (table->put(*lvt, lvt) == false
2226 && _need_verify
2227 && _major_version >= JAVA_1_5_VERSION) {
2228 classfile_parse_error("Duplicated LocalVariableTable attribute "
2229 "entry for '%s' in class file %s",
2230 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2231 CHECK);
2232 }
2233 }
2234 }
2235
2236 // To merge LocalVariableTable and LocalVariableTypeTable
2237 const Classfile_LVT_Element* cf_lvtt;
2238 LocalVariableTableElement lvtt_elem;
2239
2240 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2241 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2242 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2243 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2244 LocalVariableTableElement** entry = table->get(lvtt_elem);
2245 if (entry == NULL) {
2246 if (_need_verify) {
2247 classfile_parse_error("LVTT entry for '%s' in class file %s "
2248 "does not match any LVT entry",
2249 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2250 CHECK);
2251 }
2252 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2253 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2254 "entry for '%s' in class file %s",
2255 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2256 CHECK);
2257 } else {
2258 // to add generic signatures into LocalVariableTable
2259 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2260 }
2261 }
2262 }
2263 }
2264
2265
2266 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2267 const u1* runtime_visible_annotations,
2268 int runtime_visible_annotations_length,
2269 const u1* runtime_invisible_annotations,
2270 int runtime_invisible_annotations_length,
2271 const u1* runtime_visible_parameter_annotations,
2272 int runtime_visible_parameter_annotations_length,
2273 const u1* runtime_invisible_parameter_annotations,
2274 int runtime_invisible_parameter_annotations_length,
2275 const u1* runtime_visible_type_annotations,
2276 int runtime_visible_type_annotations_length,
2277 const u1* runtime_invisible_type_annotations,
2278 int runtime_invisible_type_annotations_length,
2279 const u1* annotation_default,
2280 int annotation_default_length,
2281 TRAPS) {
2282
2283 AnnotationArray* a;
2284
2285 if (runtime_visible_annotations_length +
2286 runtime_invisible_annotations_length > 0) {
2287 a = assemble_annotations(runtime_visible_annotations,
2288 runtime_visible_annotations_length,
2289 runtime_invisible_annotations,
2290 runtime_invisible_annotations_length,
2291 CHECK);
2292 cm->set_method_annotations(a);
2293 }
2294
2295 if (runtime_visible_parameter_annotations_length +
2296 runtime_invisible_parameter_annotations_length > 0) {
2297 a = assemble_annotations(runtime_visible_parameter_annotations,
2298 runtime_visible_parameter_annotations_length,
2299 runtime_invisible_parameter_annotations,
2300 runtime_invisible_parameter_annotations_length,
2301 CHECK);
2302 cm->set_parameter_annotations(a);
2303 }
2304
2305 if (annotation_default_length > 0) {
2306 a = assemble_annotations(annotation_default,
2307 annotation_default_length,
2308 NULL,
2309 0,
2310 CHECK);
2311 cm->set_default_annotations(a);
2312 }
2313
2314 if (runtime_visible_type_annotations_length +
2315 runtime_invisible_type_annotations_length > 0) {
2316 a = assemble_annotations(runtime_visible_type_annotations,
2317 runtime_visible_type_annotations_length,
2318 runtime_invisible_type_annotations,
2319 runtime_invisible_type_annotations_length,
2320 CHECK);
2321 cm->set_type_annotations(a);
2322 }
2323 }
2324
2325
2326 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2327 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2328 // Method* to save footprint, so we only know the size of the resulting Method* when the
2329 // entire method attribute is parsed.
2330 //
2331 // The promoted_flags parameter is used to pass relevant access_flags
2332 // from the method back up to the containing klass. These flag values
2333 // are added to klass's access_flags.
2334
2335 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2336 bool is_interface,
2337 const ConstantPool* cp,
2338 AccessFlags* const promoted_flags,
2339 TRAPS) {
2340 assert(cfs != NULL, "invariant");
2341 assert(cp != NULL, "invariant");
2342 assert(promoted_flags != NULL, "invariant");
2343
2344 ResourceMark rm(THREAD);
2345 // Parse fixed parts:
2346 // access_flags, name_index, descriptor_index, attributes_count
2347 cfs->guarantee_more(8, CHECK_NULL);
2348
2349 int flags = cfs->get_u2_fast();
2350 const u2 name_index = cfs->get_u2_fast();
2351 const int cp_size = cp->length();
2352 check_property(
2353 valid_symbol_at(name_index),
2354 "Illegal constant pool index %u for method name in class file %s",
2355 name_index, CHECK_NULL);
2356 const Symbol* const name = cp->symbol_at(name_index);
2357 verify_legal_method_name(name, CHECK_NULL);
2358
2359 const u2 signature_index = cfs->get_u2_fast();
2360 guarantee_property(
2361 valid_symbol_at(signature_index),
2362 "Illegal constant pool index %u for method signature in class file %s",
2363 signature_index, CHECK_NULL);
2364 const Symbol* const signature = cp->symbol_at(signature_index);
2365
2366 if (name == vmSymbols::class_initializer_name()) {
2367 // We ignore the other access flags for a valid class initializer.
2368 // (JVM Spec 2nd ed., chapter 4.6)
2369 if (_major_version < 51) { // backward compatibility
2370 flags = JVM_ACC_STATIC;
2371 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2372 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2373 } else {
2374 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2375 }
2376 } else {
2377 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2378 }
2379
2380 if (name == vmSymbols::object_initializer_name() && is_interface) {
2381 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2382 }
2383
2384 int args_size = -1; // only used when _need_verify is true
2385 if (_need_verify) {
2386 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2387 verify_legal_method_signature(name, signature, CHECK_NULL);
2388 if (args_size > MAX_ARGS_SIZE) {
2389 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2390 }
2391 }
2392
2393 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2394
2395 // Default values for code and exceptions attribute elements
2396 u2 max_stack = 0;
2397 u2 max_locals = 0;
2398 u4 code_length = 0;
2399 const u1* code_start = 0;
2400 u2 exception_table_length = 0;
2401 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2402 Array<int>* exception_handlers = Universe::the_empty_int_array();
2403 u2 checked_exceptions_length = 0;
2404 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2405 CompressedLineNumberWriteStream* linenumber_table = NULL;
2406 int linenumber_table_length = 0;
2407 int total_lvt_length = 0;
2408 u2 lvt_cnt = 0;
2409 u2 lvtt_cnt = 0;
2410 bool lvt_allocated = false;
2411 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2412 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2413 u2* localvariable_table_length = NULL;
2414 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2415 u2* localvariable_type_table_length = NULL;
2416 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2417 int method_parameters_length = -1;
2418 const u1* method_parameters_data = NULL;
2419 bool method_parameters_seen = false;
2420 bool parsed_code_attribute = false;
2421 bool parsed_checked_exceptions_attribute = false;
2422 bool parsed_stackmap_attribute = false;
2423 // stackmap attribute - JDK1.5
2424 const u1* stackmap_data = NULL;
2425 int stackmap_data_length = 0;
2426 u2 generic_signature_index = 0;
2427 MethodAnnotationCollector parsed_annotations;
2428 const u1* runtime_visible_annotations = NULL;
2429 int runtime_visible_annotations_length = 0;
2430 const u1* runtime_invisible_annotations = NULL;
2431 int runtime_invisible_annotations_length = 0;
2432 const u1* runtime_visible_parameter_annotations = NULL;
2433 int runtime_visible_parameter_annotations_length = 0;
2434 const u1* runtime_invisible_parameter_annotations = NULL;
2435 int runtime_invisible_parameter_annotations_length = 0;
2436 const u1* runtime_visible_type_annotations = NULL;
2437 int runtime_visible_type_annotations_length = 0;
2438 const u1* runtime_invisible_type_annotations = NULL;
2439 int runtime_invisible_type_annotations_length = 0;
2440 bool runtime_invisible_annotations_exists = false;
2441 bool runtime_invisible_type_annotations_exists = false;
2442 bool runtime_invisible_parameter_annotations_exists = false;
2443 const u1* annotation_default = NULL;
2444 int annotation_default_length = 0;
2445
2446 // Parse code and exceptions attribute
2447 u2 method_attributes_count = cfs->get_u2_fast();
2448 while (method_attributes_count--) {
2449 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2450 const u2 method_attribute_name_index = cfs->get_u2_fast();
2451 const u4 method_attribute_length = cfs->get_u4_fast();
2452 check_property(
2453 valid_symbol_at(method_attribute_name_index),
2454 "Invalid method attribute name index %u in class file %s",
2455 method_attribute_name_index, CHECK_NULL);
2456
2457 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2458 if (method_attribute_name == vmSymbols::tag_code()) {
2459 // Parse Code attribute
2460 if (_need_verify) {
2461 guarantee_property(
2462 !access_flags.is_native() && !access_flags.is_abstract(),
2463 "Code attribute in native or abstract methods in class file %s",
2464 CHECK_NULL);
2465 }
2466 if (parsed_code_attribute) {
2467 classfile_parse_error("Multiple Code attributes in class file %s",
2468 CHECK_NULL);
2469 }
2470 parsed_code_attribute = true;
2471
2472 // Stack size, locals size, and code size
2473 if (_major_version == 45 && _minor_version <= 2) {
2474 cfs->guarantee_more(4, CHECK_NULL);
2475 max_stack = cfs->get_u1_fast();
2476 max_locals = cfs->get_u1_fast();
2477 code_length = cfs->get_u2_fast();
2478 } else {
2479 cfs->guarantee_more(8, CHECK_NULL);
2480 max_stack = cfs->get_u2_fast();
2481 max_locals = cfs->get_u2_fast();
2482 code_length = cfs->get_u4_fast();
2483 }
2484 if (_need_verify) {
2485 guarantee_property(args_size <= max_locals,
2486 "Arguments can't fit into locals in class file %s",
2487 CHECK_NULL);
2488 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2489 "Invalid method Code length %u in class file %s",
2490 code_length, CHECK_NULL);
2491 }
2492 // Code pointer
2493 code_start = cfs->current();
2494 assert(code_start != NULL, "null code start");
2495 cfs->guarantee_more(code_length, CHECK_NULL);
2496 cfs->skip_u1_fast(code_length);
2497
2498 // Exception handler table
2499 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2500 exception_table_length = cfs->get_u2_fast();
2501 if (exception_table_length > 0) {
2502 exception_table_start = parse_exception_table(cfs,
2503 code_length,
2504 exception_table_length,
2505 CHECK_NULL);
2506 }
2507
2508 // Parse additional attributes in code attribute
2509 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2510 u2 code_attributes_count = cfs->get_u2_fast();
2511
2512 unsigned int calculated_attribute_length = 0;
2513
2514 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2515 calculated_attribute_length =
2516 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2517 } else {
2518 // max_stack, locals and length are smaller in pre-version 45.2 classes
2519 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2520 }
2521 calculated_attribute_length +=
2522 code_length +
2523 sizeof(exception_table_length) +
2524 sizeof(code_attributes_count) +
2525 exception_table_length *
2526 ( sizeof(u2) + // start_pc
2527 sizeof(u2) + // end_pc
2528 sizeof(u2) + // handler_pc
2529 sizeof(u2) ); // catch_type_index
2530
2531 while (code_attributes_count--) {
2532 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2533 const u2 code_attribute_name_index = cfs->get_u2_fast();
2534 const u4 code_attribute_length = cfs->get_u4_fast();
2535 calculated_attribute_length += code_attribute_length +
2536 sizeof(code_attribute_name_index) +
2537 sizeof(code_attribute_length);
2538 check_property(valid_symbol_at(code_attribute_name_index),
2539 "Invalid code attribute name index %u in class file %s",
2540 code_attribute_name_index,
2541 CHECK_NULL);
2542 if (LoadLineNumberTables &&
2543 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2544 // Parse and compress line number table
2545 parse_linenumber_table(code_attribute_length,
2546 code_length,
2547 &linenumber_table,
2548 CHECK_NULL);
2549
2550 } else if (LoadLocalVariableTables &&
2551 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2552 // Parse local variable table
2553 if (!lvt_allocated) {
2554 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2555 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2556 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2557 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2558 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2559 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2560 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2561 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2562 lvt_allocated = true;
2563 }
2564 if (lvt_cnt == max_lvt_cnt) {
2565 max_lvt_cnt <<= 1;
2566 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2567 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2568 }
2569 localvariable_table_start[lvt_cnt] =
2570 parse_localvariable_table(cfs,
2571 code_length,
2572 max_locals,
2573 code_attribute_length,
2574 &localvariable_table_length[lvt_cnt],
2575 false, // is not LVTT
2576 CHECK_NULL);
2577 total_lvt_length += localvariable_table_length[lvt_cnt];
2578 lvt_cnt++;
2579 } else if (LoadLocalVariableTypeTables &&
2580 _major_version >= JAVA_1_5_VERSION &&
2581 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2582 if (!lvt_allocated) {
2583 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2584 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2585 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2586 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2587 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2588 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2589 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2590 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2591 lvt_allocated = true;
2592 }
2593 // Parse local variable type table
2594 if (lvtt_cnt == max_lvtt_cnt) {
2595 max_lvtt_cnt <<= 1;
2596 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2597 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2598 }
2599 localvariable_type_table_start[lvtt_cnt] =
2600 parse_localvariable_table(cfs,
2601 code_length,
2602 max_locals,
2603 code_attribute_length,
2604 &localvariable_type_table_length[lvtt_cnt],
2605 true, // is LVTT
2606 CHECK_NULL);
2607 lvtt_cnt++;
2608 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2609 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2610 // Stack map is only needed by the new verifier in JDK1.5.
2611 if (parsed_stackmap_attribute) {
2612 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2613 }
2614 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2615 stackmap_data_length = code_attribute_length;
2616 parsed_stackmap_attribute = true;
2617 } else {
2618 // Skip unknown attributes
2619 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2620 }
2621 }
2622 // check method attribute length
2623 if (_need_verify) {
2624 guarantee_property(method_attribute_length == calculated_attribute_length,
2625 "Code segment has wrong length in class file %s",
2626 CHECK_NULL);
2627 }
2628 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2629 // Parse Exceptions attribute
2630 if (parsed_checked_exceptions_attribute) {
2631 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2632 CHECK_NULL);
2633 }
2634 parsed_checked_exceptions_attribute = true;
2635 checked_exceptions_start =
2636 parse_checked_exceptions(cfs,
2637 &checked_exceptions_length,
2638 method_attribute_length,
2639 CHECK_NULL);
2640 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2641 // reject multiple method parameters
2642 if (method_parameters_seen) {
2643 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2644 CHECK_NULL);
2645 }
2646 method_parameters_seen = true;
2647 method_parameters_length = cfs->get_u1_fast();
2648 const u2 real_length = (method_parameters_length * 4u) + 1u;
2649 if (method_attribute_length != real_length) {
2650 classfile_parse_error(
2651 "Invalid MethodParameters method attribute length %u in class file",
2652 method_attribute_length, CHECK_NULL);
2653 }
2654 method_parameters_data = cfs->current();
2655 cfs->skip_u2_fast(method_parameters_length);
2656 cfs->skip_u2_fast(method_parameters_length);
2657 // ignore this attribute if it cannot be reflected
2658 if (!SystemDictionary::Parameter_klass_loaded())
2659 method_parameters_length = -1;
2660 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2661 if (method_attribute_length != 0) {
2662 classfile_parse_error(
2663 "Invalid Synthetic method attribute length %u in class file %s",
2664 method_attribute_length, CHECK_NULL);
2665 }
2666 // Should we check that there hasn't already been a synthetic attribute?
2667 access_flags.set_is_synthetic();
2668 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2669 if (method_attribute_length != 0) {
2670 classfile_parse_error(
2671 "Invalid Deprecated method attribute length %u in class file %s",
2672 method_attribute_length, CHECK_NULL);
2673 }
2674 } else if (_major_version >= JAVA_1_5_VERSION) {
2675 if (method_attribute_name == vmSymbols::tag_signature()) {
2676 if (generic_signature_index != 0) {
2677 classfile_parse_error(
2678 "Multiple Signature attributes for method in class file %s",
2679 CHECK_NULL);
2680 }
2681 if (method_attribute_length != 2) {
2682 classfile_parse_error(
2683 "Invalid Signature attribute length %u in class file %s",
2684 method_attribute_length, CHECK_NULL);
2685 }
2686 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2687 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2688 if (runtime_visible_annotations != NULL) {
2689 classfile_parse_error(
2690 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2691 CHECK_NULL);
2692 }
2693 runtime_visible_annotations_length = method_attribute_length;
2694 runtime_visible_annotations = cfs->current();
2695 assert(runtime_visible_annotations != NULL, "null visible annotations");
2696 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2697 parse_annotations(cp,
2698 runtime_visible_annotations,
2699 runtime_visible_annotations_length,
2700 &parsed_annotations,
2701 _loader_data,
2702 CHECK_NULL);
2703 cfs->skip_u1_fast(runtime_visible_annotations_length);
2704 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2705 if (runtime_invisible_annotations_exists) {
2706 classfile_parse_error(
2707 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2708 CHECK_NULL);
2709 }
2710 runtime_invisible_annotations_exists = true;
2711 if (PreserveAllAnnotations) {
2712 runtime_invisible_annotations_length = method_attribute_length;
2713 runtime_invisible_annotations = cfs->current();
2714 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2715 }
2716 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2717 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2718 if (runtime_visible_parameter_annotations != NULL) {
2719 classfile_parse_error(
2720 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2721 CHECK_NULL);
2722 }
2723 runtime_visible_parameter_annotations_length = method_attribute_length;
2724 runtime_visible_parameter_annotations = cfs->current();
2725 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2726 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2727 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2728 if (runtime_invisible_parameter_annotations_exists) {
2729 classfile_parse_error(
2730 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2731 CHECK_NULL);
2732 }
2733 runtime_invisible_parameter_annotations_exists = true;
2734 if (PreserveAllAnnotations) {
2735 runtime_invisible_parameter_annotations_length = method_attribute_length;
2736 runtime_invisible_parameter_annotations = cfs->current();
2737 assert(runtime_invisible_parameter_annotations != NULL,
2738 "null invisible parameter annotations");
2739 }
2740 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2741 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2742 if (annotation_default != NULL) {
2743 classfile_parse_error(
2744 "Multiple AnnotationDefault attributes for method in class file %s",
2745 CHECK_NULL);
2746 }
2747 annotation_default_length = method_attribute_length;
2748 annotation_default = cfs->current();
2749 assert(annotation_default != NULL, "null annotation default");
2750 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2751 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2752 if (runtime_visible_type_annotations != NULL) {
2753 classfile_parse_error(
2754 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2755 CHECK_NULL);
2756 }
2757 runtime_visible_type_annotations_length = method_attribute_length;
2758 runtime_visible_type_annotations = cfs->current();
2759 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2760 // No need for the VM to parse Type annotations
2761 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2762 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2763 if (runtime_invisible_type_annotations_exists) {
2764 classfile_parse_error(
2765 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2766 CHECK_NULL);
2767 } else {
2768 runtime_invisible_type_annotations_exists = true;
2769 }
2770 if (PreserveAllAnnotations) {
2771 runtime_invisible_type_annotations_length = method_attribute_length;
2772 runtime_invisible_type_annotations = cfs->current();
2773 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2774 }
2775 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2776 } else {
2777 // Skip unknown attributes
2778 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2779 }
2780 } else {
2781 // Skip unknown attributes
2782 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2783 }
2784 }
2785
2786 if (linenumber_table != NULL) {
2787 linenumber_table->write_terminator();
2788 linenumber_table_length = linenumber_table->position();
2789 }
2790
2791 // Make sure there's at least one Code attribute in non-native/non-abstract method
2792 if (_need_verify) {
2793 guarantee_property(access_flags.is_native() ||
2794 access_flags.is_abstract() ||
2795 parsed_code_attribute,
2796 "Absent Code attribute in method that is not native or abstract in class file %s",
2797 CHECK_NULL);
2798 }
2799
2800 // All sizing information for a Method* is finally available, now create it
2801 InlineTableSizes sizes(
2802 total_lvt_length,
2803 linenumber_table_length,
2804 exception_table_length,
2805 checked_exceptions_length,
2806 method_parameters_length,
2807 generic_signature_index,
2808 runtime_visible_annotations_length +
2809 runtime_invisible_annotations_length,
2810 runtime_visible_parameter_annotations_length +
2811 runtime_invisible_parameter_annotations_length,
2812 runtime_visible_type_annotations_length +
2813 runtime_invisible_type_annotations_length,
2814 annotation_default_length,
2815 0);
2816
2817 Method* const m = Method::allocate(_loader_data,
2818 code_length,
2819 access_flags,
2820 &sizes,
2821 ConstMethod::NORMAL,
2822 CHECK_NULL);
2823
2824 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2825
2826 // Fill in information from fixed part (access_flags already set)
2827 m->set_constants(_cp);
2828 m->set_name_index(name_index);
2829 m->set_signature_index(signature_index);
2830
2831 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2832 m->constMethod()->set_result_type(rtf.type());
2833
2834 if (args_size >= 0) {
2835 m->set_size_of_parameters(args_size);
2836 } else {
2837 m->compute_size_of_parameters(THREAD);
2838 }
2839 #ifdef ASSERT
2840 if (args_size >= 0) {
2841 m->compute_size_of_parameters(THREAD);
2842 assert(args_size == m->size_of_parameters(), "");
2843 }
2844 #endif
2845
2846 // Fill in code attribute information
2847 m->set_max_stack(max_stack);
2848 m->set_max_locals(max_locals);
2849 if (stackmap_data != NULL) {
2850 m->constMethod()->copy_stackmap_data(_loader_data,
2851 (u1*)stackmap_data,
2852 stackmap_data_length,
2853 CHECK_NULL);
2854 }
2855
2856 // Copy byte codes
2857 m->set_code((u1*)code_start);
2858
2859 // Copy line number table
2860 if (linenumber_table != NULL) {
2861 memcpy(m->compressed_linenumber_table(),
2862 linenumber_table->buffer(),
2863 linenumber_table_length);
2864 }
2865
2866 // Copy exception table
2867 if (exception_table_length > 0) {
2868 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2869 m->exception_table_start(),
2870 exception_table_length * sizeof(ExceptionTableElement),
2871 sizeof(u2));
2872 }
2873
2874 // Copy method parameters
2875 if (method_parameters_length > 0) {
2876 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2877 for (int i = 0; i < method_parameters_length; i++) {
2878 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2879 method_parameters_data += 2;
2880 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2881 method_parameters_data += 2;
2882 }
2883 }
2884
2885 // Copy checked exceptions
2886 if (checked_exceptions_length > 0) {
2887 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2888 m->checked_exceptions_start(),
2889 checked_exceptions_length * sizeof(CheckedExceptionElement),
2890 sizeof(u2));
2891 }
2892
2893 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2894 if (total_lvt_length > 0) {
2895 promoted_flags->set_has_localvariable_table();
2896 copy_localvariable_table(m->constMethod(),
2897 lvt_cnt,
2898 localvariable_table_length,
2899 localvariable_table_start,
2900 lvtt_cnt,
2901 localvariable_type_table_length,
2902 localvariable_type_table_start,
2903 CHECK_NULL);
2904 }
2905
2906 if (parsed_annotations.has_any_annotations())
2907 parsed_annotations.apply_to(m);
2908
2909 // Copy annotations
2910 copy_method_annotations(m->constMethod(),
2911 runtime_visible_annotations,
2912 runtime_visible_annotations_length,
2913 runtime_invisible_annotations,
2914 runtime_invisible_annotations_length,
2915 runtime_visible_parameter_annotations,
2916 runtime_visible_parameter_annotations_length,
2917 runtime_invisible_parameter_annotations,
2918 runtime_invisible_parameter_annotations_length,
2919 runtime_visible_type_annotations,
2920 runtime_visible_type_annotations_length,
2921 runtime_invisible_type_annotations,
2922 runtime_invisible_type_annotations_length,
2923 annotation_default,
2924 annotation_default_length,
2925 CHECK_NULL);
2926
2927 if (name == vmSymbols::finalize_method_name() &&
2928 signature == vmSymbols::void_method_signature()) {
2929 if (m->is_empty_method()) {
2930 _has_empty_finalizer = true;
2931 } else {
2932 _has_finalizer = true;
2933 }
2934 }
2935 if (name == vmSymbols::object_initializer_name() &&
2936 signature == vmSymbols::void_method_signature() &&
2937 m->is_vanilla_constructor()) {
2938 _has_vanilla_constructor = true;
2939 }
2940
2941 NOT_PRODUCT(m->verify());
2942 return m;
2943 }
2944
2945
2946 // The promoted_flags parameter is used to pass relevant access_flags
2947 // from the methods back up to the containing klass. These flag values
2948 // are added to klass's access_flags.
2949 // Side-effects: populates the _methods field in the parser
2950 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2951 bool is_interface,
2952 AccessFlags* promoted_flags,
2953 bool* has_final_method,
2954 bool* declares_nonstatic_concrete_methods,
2955 TRAPS) {
2956 assert(cfs != NULL, "invariant");
2957 assert(promoted_flags != NULL, "invariant");
2958 assert(has_final_method != NULL, "invariant");
2959 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2960
2961 assert(NULL == _methods, "invariant");
2962
2963 cfs->guarantee_more(2, CHECK); // length
2964 const u2 length = cfs->get_u2_fast();
2965 if (length == 0) {
2966 _methods = Universe::the_empty_method_array();
2967 } else {
2968 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2969 length,
2970 NULL,
2971 CHECK);
2972
2973 for (int index = 0; index < length; index++) {
2974 Method* method = parse_method(cfs,
2975 is_interface,
2976 _cp,
2977 promoted_flags,
2978 CHECK);
2979
2980 if (method->is_final()) {
2981 *has_final_method = true;
2982 }
2983 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2984 // used for interface initialization, and default method inheritance analysis
2985 if (is_interface && !(*declares_nonstatic_concrete_methods)
2986 && !method->is_abstract() && !method->is_static()) {
2987 *declares_nonstatic_concrete_methods = true;
2988 }
2989 _methods->at_put(index, method);
2990 }
2991
2992 if (_need_verify && length > 1) {
2993 // Check duplicated methods
2994 ResourceMark rm(THREAD);
2995 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2996 THREAD, NameSigHash*, HASH_ROW_SIZE);
2997 initialize_hashtable(names_and_sigs);
2998 bool dup = false;
2999 const Symbol* name = NULL;
3000 const Symbol* sig = NULL;
3001 {
3002 debug_only(NoSafepointVerifier nsv;)
3003 for (int i = 0; i < length; i++) {
3004 const Method* const m = _methods->at(i);
3005 name = m->name();
3006 sig = m->signature();
3007 // If no duplicates, add name/signature in hashtable names_and_sigs.
3008 if (!put_after_lookup(name, sig, names_and_sigs)) {
3009 dup = true;
3010 break;
3011 }
3012 }
3013 }
3014 if (dup) {
3015 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3016 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3017 }
3018 }
3019 }
3020 }
3021
3022 static const intArray* sort_methods(Array<Method*>* methods) {
3023 const int length = methods->length();
3024 // If JVMTI original method ordering or sharing is enabled we have to
3025 // remember the original class file ordering.
3026 // We temporarily use the vtable_index field in the Method* to store the
3027 // class file index, so we can read in after calling qsort.
3028 // Put the method ordering in the shared archive.
3029 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3030 for (int index = 0; index < length; index++) {
3031 Method* const m = methods->at(index);
3032 assert(!m->valid_vtable_index(), "vtable index should not be set");
3033 m->set_vtable_index(index);
3034 }
3035 }
3036 // Sort method array by ascending method name (for faster lookups & vtable construction)
3037 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3038 Method::sort_methods(methods);
3039
3040 intArray* method_ordering = NULL;
3041 // If JVMTI original method ordering or sharing is enabled construct int
3042 // array remembering the original ordering
3043 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3044 method_ordering = new intArray(length, length, -1);
3045 for (int index = 0; index < length; index++) {
3046 Method* const m = methods->at(index);
3047 const int old_index = m->vtable_index();
3048 assert(old_index >= 0 && old_index < length, "invalid method index");
3049 method_ordering->at_put(index, old_index);
3050 m->set_vtable_index(Method::invalid_vtable_index);
3051 }
3052 }
3053 return method_ordering;
3054 }
3055
3056 // Parse generic_signature attribute for methods and fields
3057 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3058 TRAPS) {
3059 assert(cfs != NULL, "invariant");
3060
3061 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3062 const u2 generic_signature_index = cfs->get_u2_fast();
3063 check_property(
3064 valid_symbol_at(generic_signature_index),
3065 "Invalid Signature attribute at constant pool index %u in class file %s",
3066 generic_signature_index, CHECK_0);
3067 return generic_signature_index;
3068 }
3069
3070 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3071 TRAPS) {
3072
3073 assert(cfs != NULL, "invariant");
3074
3075 cfs->guarantee_more(2, CHECK); // sourcefile_index
3076 const u2 sourcefile_index = cfs->get_u2_fast();
3077 check_property(
3078 valid_symbol_at(sourcefile_index),
3079 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3080 sourcefile_index, CHECK);
3081 set_class_sourcefile_index(sourcefile_index);
3082 }
3083
3084 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3085 int length,
3086 TRAPS) {
3087 assert(cfs != NULL, "invariant");
3088
3089 const u1* const sde_buffer = cfs->current();
3090 assert(sde_buffer != NULL, "null sde buffer");
3091
3092 // Don't bother storing it if there is no way to retrieve it
3093 if (JvmtiExport::can_get_source_debug_extension()) {
3094 assert((length+1) > length, "Overflow checking");
3095 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3096 for (int i = 0; i < length; i++) {
3097 sde[i] = sde_buffer[i];
3098 }
3099 sde[length] = '\0';
3100 set_class_sde_buffer((const char*)sde, length);
3101 }
3102 // Got utf8 string, set stream position forward
3103 cfs->skip_u1(length, CHECK);
3104 }
3105
3106
3107 // Inner classes can be static, private or protected (classic VM does this)
3108 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3109 JVM_ACC_PRIVATE | \
3110 JVM_ACC_PROTECTED | \
3111 JVM_ACC_STATIC \
3112 )
3113
3114 // Return number of classes in the inner classes attribute table
3115 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3116 const u1* const inner_classes_attribute_start,
3117 bool parsed_enclosingmethod_attribute,
3118 u2 enclosing_method_class_index,
3119 u2 enclosing_method_method_index,
3120 TRAPS) {
3121 const u1* const current_mark = cfs->current();
3122 u2 length = 0;
3123 if (inner_classes_attribute_start != NULL) {
3124 cfs->set_current(inner_classes_attribute_start);
3125 cfs->guarantee_more(2, CHECK_0); // length
3126 length = cfs->get_u2_fast();
3127 }
3128
3129 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3130 // method data:
3131 // [inner_class_info_index,
3132 // outer_class_info_index,
3133 // inner_name_index,
3134 // inner_class_access_flags,
3135 // ...
3136 // enclosing_method_class_index,
3137 // enclosing_method_method_index]
3138 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3139 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3140 _inner_classes = inner_classes;
3141
3142 int index = 0;
3143 const int cp_size = _cp->length();
3144 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3145 for (int n = 0; n < length; n++) {
3146 // Inner class index
3147 const u2 inner_class_info_index = cfs->get_u2_fast();
3148 check_property(
3149 (valid_klass_reference_at(inner_class_info_index) ||
3150 ((EnableValhalla || EnableMVT) && valid_value_type_reference_at(inner_class_info_index))),
3151 "inner_class_info_index %u has bad constant type in class file %s",
3152 inner_class_info_index, CHECK_0);
3153 // Outer class index
3154 const u2 outer_class_info_index = cfs->get_u2_fast();
3155 check_property(
3156 outer_class_info_index == 0 ||
3157 valid_klass_reference_at(outer_class_info_index),
3158 "outer_class_info_index %u has bad constant type in class file %s",
3159 outer_class_info_index, CHECK_0);
3160 // Inner class name
3161 const u2 inner_name_index = cfs->get_u2_fast();
3162 check_property(
3163 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3164 "inner_name_index %u has bad constant type in class file %s",
3165 inner_name_index, CHECK_0);
3166 if (_need_verify) {
3167 guarantee_property(inner_class_info_index != outer_class_info_index,
3168 "Class is both outer and inner class in class file %s", CHECK_0);
3169 }
3170
3171 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3172 // JVM_ACC_MODULE is defined in JDK-9 and later.
3173 if (_major_version >= JAVA_9_VERSION) {
3174 recognized_modifiers |= JVM_ACC_MODULE;
3175 }
3176 // JVM_ACC_VALUE is defined for class file version 53.1 and later
3177 if (supports_value_types()) {
3178 recognized_modifiers |= JVM_ACC_VALUE;
3179 }
3180
3181 // Access flags
3182 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3183
3184 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3185 // Set abstract bit for old class files for backward compatibility
3186 flags |= JVM_ACC_ABSTRACT;
3187 }
3188 verify_legal_class_modifiers(flags, CHECK_0);
3189 AccessFlags inner_access_flags(flags);
3190
3191 inner_classes->at_put(index++, inner_class_info_index);
3192 inner_classes->at_put(index++, outer_class_info_index);
3193 inner_classes->at_put(index++, inner_name_index);
3194 inner_classes->at_put(index++, inner_access_flags.as_short());
3195 }
3196
3197 // 4347400: make sure there's no duplicate entry in the classes array
3198 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3199 for(int i = 0; i < length * 4; i += 4) {
3200 for(int j = i + 4; j < length * 4; j += 4) {
3201 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3202 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3203 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3204 inner_classes->at(i+3) != inner_classes->at(j+3)),
3205 "Duplicate entry in InnerClasses in class file %s",
3206 CHECK_0);
3207 }
3208 }
3209 }
3210
3211 // Set EnclosingMethod class and method indexes.
3212 if (parsed_enclosingmethod_attribute) {
3213 inner_classes->at_put(index++, enclosing_method_class_index);
3214 inner_classes->at_put(index++, enclosing_method_method_index);
3215 }
3216 assert(index == size, "wrong size");
3217
3218 // Restore buffer's current position.
3219 cfs->set_current(current_mark);
3220
3221 return length;
3222 }
3223
3224 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3225 set_class_synthetic_flag(true);
3226 }
3227
3228 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3229 assert(cfs != NULL, "invariant");
3230
3231 const u2 signature_index = cfs->get_u2(CHECK);
3232 check_property(
3233 valid_symbol_at(signature_index),
3234 "Invalid constant pool index %u in Signature attribute in class file %s",
3235 signature_index, CHECK);
3236 set_class_generic_signature_index(signature_index);
3237 }
3238
3239 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3240 ConstantPool* cp,
3241 u4 attribute_byte_length,
3242 TRAPS) {
3243 assert(cfs != NULL, "invariant");
3244 assert(cp != NULL, "invariant");
3245
3246 const u1* const current_start = cfs->current();
3247
3248 guarantee_property(attribute_byte_length >= sizeof(u2),
3249 "Invalid BootstrapMethods attribute length %u in class file %s",
3250 attribute_byte_length,
3251 CHECK);
3252
3253 cfs->guarantee_more(attribute_byte_length, CHECK);
3254
3255 const int attribute_array_length = cfs->get_u2_fast();
3256
3257 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3258 "Short length on BootstrapMethods in class file %s",
3259 CHECK);
3260
3261
3262 // The attribute contains a counted array of counted tuples of shorts,
3263 // represending bootstrap specifiers:
3264 // length*{bootstrap_method_index, argument_count*{argument_index}}
3265 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3266 // operand_count = number of shorts in attr, except for leading length
3267
3268 // The attribute is copied into a short[] array.
3269 // The array begins with a series of short[2] pairs, one for each tuple.
3270 const int index_size = (attribute_array_length * 2);
3271
3272 Array<u2>* const operands =
3273 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3274
3275 // Eagerly assign operands so they will be deallocated with the constant
3276 // pool if there is an error.
3277 cp->set_operands(operands);
3278
3279 int operand_fill_index = index_size;
3280 const int cp_size = cp->length();
3281
3282 for (int n = 0; n < attribute_array_length; n++) {
3283 // Store a 32-bit offset into the header of the operand array.
3284 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3285
3286 // Read a bootstrap specifier.
3287 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3288 const u2 bootstrap_method_index = cfs->get_u2_fast();
3289 const u2 argument_count = cfs->get_u2_fast();
3290 check_property(
3291 valid_cp_range(bootstrap_method_index, cp_size) &&
3292 cp->tag_at(bootstrap_method_index).is_method_handle(),
3293 "bootstrap_method_index %u has bad constant type in class file %s",
3294 bootstrap_method_index,
3295 CHECK);
3296
3297 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3298 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3299 CHECK);
3300
3301 operands->at_put(operand_fill_index++, bootstrap_method_index);
3302 operands->at_put(operand_fill_index++, argument_count);
3303
3304 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3305 for (int j = 0; j < argument_count; j++) {
3306 const u2 argument_index = cfs->get_u2_fast();
3307 check_property(
3308 valid_cp_range(argument_index, cp_size) &&
3309 cp->tag_at(argument_index).is_loadable_constant(),
3310 "argument_index %u has bad constant type in class file %s",
3311 argument_index,
3312 CHECK);
3313 operands->at_put(operand_fill_index++, argument_index);
3314 }
3315 }
3316 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3317 "Bad length on BootstrapMethods in class file %s",
3318 CHECK);
3319 }
3320
3321 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3322 ConstantPool* cp,
3323 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3324 TRAPS) {
3325 assert(cfs != NULL, "invariant");
3326 assert(cp != NULL, "invariant");
3327 assert(parsed_annotations != NULL, "invariant");
3328
3329 // Set inner classes attribute to default sentinel
3330 _inner_classes = Universe::the_empty_short_array();
3331 cfs->guarantee_more(2, CHECK); // attributes_count
3332 u2 attributes_count = cfs->get_u2_fast();
3333 bool parsed_sourcefile_attribute = false;
3334 bool parsed_innerclasses_attribute = false;
3335 bool parsed_enclosingmethod_attribute = false;
3336 bool parsed_bootstrap_methods_attribute = false;
3337 const u1* runtime_visible_annotations = NULL;
3338 int runtime_visible_annotations_length = 0;
3339 const u1* runtime_invisible_annotations = NULL;
3340 int runtime_invisible_annotations_length = 0;
3341 const u1* runtime_visible_type_annotations = NULL;
3342 int runtime_visible_type_annotations_length = 0;
3343 const u1* runtime_invisible_type_annotations = NULL;
3344 int runtime_invisible_type_annotations_length = 0;
3345 bool runtime_invisible_type_annotations_exists = false;
3346 bool runtime_invisible_annotations_exists = false;
3347 bool parsed_source_debug_ext_annotations_exist = false;
3348 const u1* inner_classes_attribute_start = NULL;
3349 u4 inner_classes_attribute_length = 0;
3350 u2 enclosing_method_class_index = 0;
3351 u2 enclosing_method_method_index = 0;
3352 // Iterate over attributes
3353 while (attributes_count--) {
3354 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3355 const u2 attribute_name_index = cfs->get_u2_fast();
3356 const u4 attribute_length = cfs->get_u4_fast();
3357 check_property(
3358 valid_symbol_at(attribute_name_index),
3359 "Attribute name has bad constant pool index %u in class file %s",
3360 attribute_name_index, CHECK);
3361 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3362 if (tag == vmSymbols::tag_source_file()) {
3363 // Check for SourceFile tag
3364 if (_need_verify) {
3365 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3366 }
3367 if (parsed_sourcefile_attribute) {
3368 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3369 } else {
3370 parsed_sourcefile_attribute = true;
3371 }
3372 parse_classfile_sourcefile_attribute(cfs, CHECK);
3373 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3374 // Check for SourceDebugExtension tag
3375 if (parsed_source_debug_ext_annotations_exist) {
3376 classfile_parse_error(
3377 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3378 }
3379 parsed_source_debug_ext_annotations_exist = true;
3380 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3381 } else if (tag == vmSymbols::tag_inner_classes()) {
3382 // Check for InnerClasses tag
3383 if (parsed_innerclasses_attribute) {
3384 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3385 } else {
3386 parsed_innerclasses_attribute = true;
3387 }
3388 inner_classes_attribute_start = cfs->current();
3389 inner_classes_attribute_length = attribute_length;
3390 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3391 } else if (tag == vmSymbols::tag_synthetic()) {
3392 // Check for Synthetic tag
3393 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3394 if (attribute_length != 0) {
3395 classfile_parse_error(
3396 "Invalid Synthetic classfile attribute length %u in class file %s",
3397 attribute_length, CHECK);
3398 }
3399 parse_classfile_synthetic_attribute(CHECK);
3400 } else if (tag == vmSymbols::tag_deprecated()) {
3401 // Check for Deprecatd tag - 4276120
3402 if (attribute_length != 0) {
3403 classfile_parse_error(
3404 "Invalid Deprecated classfile attribute length %u in class file %s",
3405 attribute_length, CHECK);
3406 }
3407 } else if (_major_version >= JAVA_1_5_VERSION) {
3408 if (tag == vmSymbols::tag_signature()) {
3409 if (_generic_signature_index != 0) {
3410 classfile_parse_error(
3411 "Multiple Signature attributes in class file %s", CHECK);
3412 }
3413 if (attribute_length != 2) {
3414 classfile_parse_error(
3415 "Wrong Signature attribute length %u in class file %s",
3416 attribute_length, CHECK);
3417 }
3418 parse_classfile_signature_attribute(cfs, CHECK);
3419 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3420 if (runtime_visible_annotations != NULL) {
3421 classfile_parse_error(
3422 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3423 }
3424 runtime_visible_annotations_length = attribute_length;
3425 runtime_visible_annotations = cfs->current();
3426 assert(runtime_visible_annotations != NULL, "null visible annotations");
3427 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3428 parse_annotations(cp,
3429 runtime_visible_annotations,
3430 runtime_visible_annotations_length,
3431 parsed_annotations,
3432 _loader_data,
3433 CHECK);
3434 cfs->skip_u1_fast(runtime_visible_annotations_length);
3435 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3436 if (runtime_invisible_annotations_exists) {
3437 classfile_parse_error(
3438 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3439 }
3440 runtime_invisible_annotations_exists = true;
3441 if (PreserveAllAnnotations) {
3442 runtime_invisible_annotations_length = attribute_length;
3443 runtime_invisible_annotations = cfs->current();
3444 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3445 }
3446 cfs->skip_u1(attribute_length, CHECK);
3447 } else if (tag == vmSymbols::tag_enclosing_method()) {
3448 if (parsed_enclosingmethod_attribute) {
3449 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3450 } else {
3451 parsed_enclosingmethod_attribute = true;
3452 }
3453 guarantee_property(attribute_length == 4,
3454 "Wrong EnclosingMethod attribute length %u in class file %s",
3455 attribute_length, CHECK);
3456 cfs->guarantee_more(4, CHECK); // class_index, method_index
3457 enclosing_method_class_index = cfs->get_u2_fast();
3458 enclosing_method_method_index = cfs->get_u2_fast();
3459 if (enclosing_method_class_index == 0) {
3460 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3461 }
3462 // Validate the constant pool indices and types
3463 check_property(valid_klass_reference_at(enclosing_method_class_index),
3464 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3465 if (enclosing_method_method_index != 0 &&
3466 (!cp->is_within_bounds(enclosing_method_method_index) ||
3467 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3468 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3469 }
3470 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3471 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3472 if (parsed_bootstrap_methods_attribute) {
3473 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3474 }
3475 parsed_bootstrap_methods_attribute = true;
3476 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3477 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3478 if (runtime_visible_type_annotations != NULL) {
3479 classfile_parse_error(
3480 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3481 }
3482 runtime_visible_type_annotations_length = attribute_length;
3483 runtime_visible_type_annotations = cfs->current();
3484 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3485 // No need for the VM to parse Type annotations
3486 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3487 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3488 if (runtime_invisible_type_annotations_exists) {
3489 classfile_parse_error(
3490 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3491 } else {
3492 runtime_invisible_type_annotations_exists = true;
3493 }
3494 if (PreserveAllAnnotations) {
3495 runtime_invisible_type_annotations_length = attribute_length;
3496 runtime_invisible_type_annotations = cfs->current();
3497 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3498 }
3499 cfs->skip_u1(attribute_length, CHECK);
3500 } else {
3501 // Unknown attribute
3502 cfs->skip_u1(attribute_length, CHECK);
3503 }
3504 } else {
3505 // Unknown attribute
3506 cfs->skip_u1(attribute_length, CHECK);
3507 }
3508 }
3509 _annotations = assemble_annotations(runtime_visible_annotations,
3510 runtime_visible_annotations_length,
3511 runtime_invisible_annotations,
3512 runtime_invisible_annotations_length,
3513 CHECK);
3514 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3515 runtime_visible_type_annotations_length,
3516 runtime_invisible_type_annotations,
3517 runtime_invisible_type_annotations_length,
3518 CHECK);
3519
3520 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3521 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3522 cfs,
3523 inner_classes_attribute_start,
3524 parsed_innerclasses_attribute,
3525 enclosing_method_class_index,
3526 enclosing_method_method_index,
3527 CHECK);
3528 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3529 guarantee_property(
3530 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3531 "Wrong InnerClasses attribute length in class file %s", CHECK);
3532 }
3533 }
3534
3535 if (_max_bootstrap_specifier_index >= 0) {
3536 guarantee_property(parsed_bootstrap_methods_attribute,
3537 "Missing BootstrapMethods attribute in class file %s", CHECK);
3538 }
3539 }
3540
3541 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3542 assert(k != NULL, "invariant");
3543
3544 if (_synthetic_flag)
3545 k->set_is_synthetic();
3546 if (_sourcefile_index != 0) {
3547 k->set_source_file_name_index(_sourcefile_index);
3548 }
3549 if (_generic_signature_index != 0) {
3550 k->set_generic_signature_index(_generic_signature_index);
3551 }
3552 if (_sde_buffer != NULL) {
3553 k->set_source_debug_extension(_sde_buffer, _sde_length);
3554 }
3555 }
3556
3557 // Create the Annotations object that will
3558 // hold the annotations array for the Klass.
3559 void ClassFileParser::create_combined_annotations(TRAPS) {
3560 if (_annotations == NULL &&
3561 _type_annotations == NULL &&
3562 _fields_annotations == NULL &&
3563 _fields_type_annotations == NULL) {
3564 // Don't create the Annotations object unnecessarily.
3565 return;
3566 }
3567
3568 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3569 annotations->set_class_annotations(_annotations);
3570 annotations->set_class_type_annotations(_type_annotations);
3571 annotations->set_fields_annotations(_fields_annotations);
3572 annotations->set_fields_type_annotations(_fields_type_annotations);
3573
3574 // This is the Annotations object that will be
3575 // assigned to InstanceKlass being constructed.
3576 _combined_annotations = annotations;
3577
3578 // The annotations arrays below has been transfered the
3579 // _combined_annotations so these fields can now be cleared.
3580 _annotations = NULL;
3581 _type_annotations = NULL;
3582 _fields_annotations = NULL;
3583 _fields_type_annotations = NULL;
3584 }
3585
3586 // Transfer ownership of metadata allocated to the InstanceKlass.
3587 void ClassFileParser::apply_parsed_class_metadata(
3588 InstanceKlass* this_klass,
3589 int java_fields_count, TRAPS) {
3590 assert(this_klass != NULL, "invariant");
3591
3592 _cp->set_pool_holder(this_klass);
3593 this_klass->set_constants(_cp);
3594 this_klass->set_fields(_fields, java_fields_count);
3595 this_klass->set_methods(_methods);
3596 this_klass->set_inner_classes(_inner_classes);
3597 this_klass->set_local_interfaces(_local_interfaces);
3598 this_klass->set_transitive_interfaces(_transitive_interfaces);
3599 this_klass->set_annotations(_combined_annotations);
3600
3601 // Clear out these fields so they don't get deallocated by the destructor
3602 clear_class_metadata();
3603 }
3604
3605 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3606 int runtime_visible_annotations_length,
3607 const u1* const runtime_invisible_annotations,
3608 int runtime_invisible_annotations_length,
3609 TRAPS) {
3610 AnnotationArray* annotations = NULL;
3611 if (runtime_visible_annotations != NULL ||
3612 runtime_invisible_annotations != NULL) {
3613 annotations = MetadataFactory::new_array<u1>(_loader_data,
3614 runtime_visible_annotations_length +
3615 runtime_invisible_annotations_length,
3616 CHECK_(annotations));
3617 if (runtime_visible_annotations != NULL) {
3618 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3619 annotations->at_put(i, runtime_visible_annotations[i]);
3620 }
3621 }
3622 if (runtime_invisible_annotations != NULL) {
3623 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3624 int append = runtime_visible_annotations_length+i;
3625 annotations->at_put(append, runtime_invisible_annotations[i]);
3626 }
3627 }
3628 }
3629 return annotations;
3630 }
3631
3632 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3633 const int super_class_index,
3634 const bool need_verify,
3635 TRAPS) {
3636 assert(cp != NULL, "invariant");
3637 const InstanceKlass* super_klass = NULL;
3638
3639 if (super_class_index == 0) {
3640 check_property(_class_name == vmSymbols::java_lang_Object()
3641 || (_access_flags.get_flags() & JVM_ACC_VALUE),
3642 "Invalid superclass index %u in class file %s",
3643 super_class_index,
3644 CHECK_NULL);
3645 } else {
3646 check_property((valid_klass_reference_at(super_class_index) ||
3647 ((EnableValhalla || EnableMVT) && valid_value_type_reference_at(super_class_index))),
3648 "Invalid superclass index %u in class file %s",
3649 super_class_index,
3650 CHECK_NULL);
3651 // The class name should be legal because it is checked when parsing constant pool.
3652 // However, make sure it is not an array type.
3653 bool is_array = false;
3654 if (cp->tag_at(super_class_index).is_klass() || cp->tag_at(super_class_index).is_value_type()) {
3655 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3656 if (need_verify)
3657 is_array = super_klass->is_array_klass();
3658 } else if (need_verify) {
3659 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3660 }
3661 if (need_verify) {
3662 guarantee_property(!is_array,
3663 "Bad superclass name in class file %s", CHECK_NULL);
3664 }
3665 }
3666 return super_klass;
3667 }
3668
3669 #ifndef PRODUCT
3670 static void print_field_layout(const Symbol* name,
3671 Array<u2>* fields,
3672 const constantPoolHandle& cp,
3673 int instance_size,
3674 int instance_fields_start,
3675 int instance_fields_end,
3676 int static_fields_end) {
3677
3678 assert(name != NULL, "invariant");
3679
3680 tty->print("%s: field layout\n", name->as_klass_external_name());
3681 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3682 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3683 if (!fs.access_flags().is_static()) {
3684 tty->print(" @%3d \"%s\" %s\n",
3685 fs.offset(),
3686 fs.name()->as_klass_external_name(),
3687 fs.signature()->as_klass_external_name());
3688 }
3689 }
3690 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3691 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3692 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3693 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3694 if (fs.access_flags().is_static()) {
3695 tty->print(" @%3d \"%s\" %s\n",
3696 fs.offset(),
3697 fs.name()->as_klass_external_name(),
3698 fs.signature()->as_klass_external_name());
3699 }
3700 }
3701 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3702 tty->print("\n");
3703 }
3704 #endif
3705
3706 // Values needed for oopmap and InstanceKlass creation
3707 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3708 public:
3709 OopMapBlocksBuilder* oop_map_blocks;
3710 int instance_size;
3711 int nonstatic_field_size;
3712 int static_field_size;
3713 bool has_nonstatic_fields;
3714 };
3715
3716 // Utility to collect and compact oop maps during layout
3717 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj {
3718 public:
3719 OopMapBlock* nonstatic_oop_maps;
3720 unsigned int nonstatic_oop_map_count;
3721 unsigned int max_nonstatic_oop_maps;
3722
3723 public:
3724 OopMapBlocksBuilder(unsigned int max_blocks, TRAPS) {
3725 max_nonstatic_oop_maps = max_blocks;
3726 nonstatic_oop_map_count = 0;
3727 if (max_blocks == 0) {
3728 nonstatic_oop_maps = NULL;
3729 } else {
3730 nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD(
3731 THREAD, OopMapBlock, max_nonstatic_oop_maps);
3732 memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3733 }
3734 }
3735
3736 OopMapBlock* last_oop_map() const {
3737 assert(nonstatic_oop_map_count > 0, "Has no oop maps");
3738 return nonstatic_oop_maps + (nonstatic_oop_map_count - 1);
3739 }
3740
3741 // addition of super oop maps
3742 void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3743 assert(nof_blocks && nonstatic_oop_map_count == 0 &&
3744 nof_blocks <= max_nonstatic_oop_maps, "invariant");
3745
3746 memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3747 nonstatic_oop_map_count += nof_blocks;
3748 }
3749
3750 // collection of oops
3751 void add(int offset, int count) {
3752 if (nonstatic_oop_map_count == 0) {
3753 nonstatic_oop_map_count++;
3754 }
3755 OopMapBlock* nonstatic_oop_map = last_oop_map();
3756 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3757 nonstatic_oop_map->set_offset(offset);
3758 nonstatic_oop_map->set_count(count);
3759 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3760 nonstatic_oop_map->increment_count(count);
3761 } else { // Need a new one...
3762 nonstatic_oop_map_count++;
3763 assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check");
3764 nonstatic_oop_map = last_oop_map();
3765 nonstatic_oop_map->set_offset(offset);
3766 nonstatic_oop_map->set_count(count);
3767 }
3768 }
3769
3770 // general purpose copy, e.g. into allocated instanceKlass
3771 void copy(OopMapBlock* dst) {
3772 if (nonstatic_oop_map_count != 0) {
3773 memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count);
3774 }
3775 }
3776
3777 // Sort and compact adjacent blocks
3778 void compact(TRAPS) {
3779 if (nonstatic_oop_map_count <= 1) {
3780 return;
3781 }
3782 /*
3783 * Since field layout sneeks in oops before values, we will be able to condense
3784 * blocks. There is potential to compact between super, own refs and values
3785 * containing refs.
3786 *
3787 * Currently compaction is slightly limited due to values being 8 byte aligned.
3788 * This may well change: FixMe if doesn't, the code below is fairly general purpose
3789 * and maybe it doesn't need to be.
3790 */
3791 qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock),
3792 (_sort_Fn)OopMapBlock::compare_offset);
3793 if (nonstatic_oop_map_count < 2) {
3794 return;
3795 }
3796
3797 //Make a temp copy, and iterate through and copy back into the orig
3798 ResourceMark rm(THREAD);
3799 OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock,
3800 nonstatic_oop_map_count);
3801 OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count;
3802 copy(oop_maps_copy);
3803 OopMapBlock* nonstatic_oop_map = nonstatic_oop_maps;
3804 unsigned int new_count = 1;
3805 oop_maps_copy++;
3806 while(oop_maps_copy < oop_maps_copy_end) {
3807 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3808 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3809 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3810 } else {
3811 nonstatic_oop_map++;
3812 new_count++;
3813 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3814 nonstatic_oop_map->set_count(oop_maps_copy->count());
3815 }
3816 oop_maps_copy++;
3817 }
3818 assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?");
3819 nonstatic_oop_map_count = new_count;
3820 }
3821
3822 void print_on(outputStream* st) const {
3823 st->print_cr(" OopMapBlocks: %3d /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps);
3824 if (nonstatic_oop_map_count > 0) {
3825 OopMapBlock* map = nonstatic_oop_maps;
3826 OopMapBlock* last_map = last_oop_map();
3827 assert(map <= last_map, "Last less than first");
3828 while (map <= last_map) {
3829 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3830 map->offset() + map->offset_span() - heapOopSize, map->count());
3831 map++;
3832 }
3833 }
3834 }
3835
3836 void print_value_on(outputStream* st) const {
3837 print_on(st);
3838 }
3839
3840 };
3841
3842 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
3843 const char* msg,
3844 const Symbol* name,
3845 const Symbol* sig) const {
3846
3847 ResourceMark rm(THREAD);
3848 if (name == NULL || sig == NULL) {
3849 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3850 vmSymbols::java_lang_ClassFormatError(),
3851 "class: %s - %s", _class_name->as_C_string(), msg);
3852 }
3853 else {
3854 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3855 vmSymbols::java_lang_ClassFormatError(),
3856 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
3857 _class_name->as_C_string(), msg);
3858 }
3859 }
3860
3861 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3862 void ClassFileParser::layout_fields(ConstantPool* cp,
3863 const FieldAllocationCount* fac,
3864 const ClassAnnotationCollector* parsed_annotations,
3865 FieldLayoutInfo* info,
3866 TRAPS) {
3867
3868 assert(cp != NULL, "invariant");
3869
3870 // Field size and offset computation
3871 int nonstatic_field_size = _super_klass == NULL ? 0 :
3872 _super_klass->nonstatic_field_size();
3873 int next_nonstatic_valuetype_offset = 0;
3874 int first_nonstatic_valuetype_offset = 0;
3875
3876 // Fields that are value types are handled differently depending if they are static or not:
3877 // - static fields are oops
3878 // - non-static fields are embedded
3879
3880 // Count the contended fields by type.
3881 //
3882 // We ignore static fields, because @Contended is not supported for them.
3883 // The layout code below will also ignore the static fields.
3884 int nonstatic_contended_count = 0;
3885 FieldAllocationCount fac_contended;
3886 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3887 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3888 if (fs.is_contended()) {
3889 fac_contended.count[atype]++;
3890 if (!fs.access_flags().is_static()) {
3891 nonstatic_contended_count++;
3892 }
3893 }
3894 }
3895
3896
3897 // Calculate the starting byte offsets
3898 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3899 // Value types in static fields are nor embedded, they are handled with oops
3900 int next_static_double_offset = next_static_oop_offset +
3901 ((fac->count[STATIC_OOP] + fac->count[STATIC_VALUETYPE]) * heapOopSize);
3902 if ( fac->count[STATIC_DOUBLE] &&
3903 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3904 Universe::field_type_should_be_aligned(T_LONG)) ) {
3905 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3906 }
3907
3908 int next_static_word_offset = next_static_double_offset +
3909 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3910 int next_static_short_offset = next_static_word_offset +
3911 ((fac->count[STATIC_WORD]) * BytesPerInt);
3912 int next_static_byte_offset = next_static_short_offset +
3913 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3914
3915 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3916 nonstatic_field_size * heapOopSize;
3917
3918 // First field of value types is aligned on a long boundary in order to ease
3919 // in-lining of value types (with header removal) in packed arrays and
3920 // flatten value types
3921 int initial_value_type_padding = 0;
3922 if (is_value_type() || is_value_capable_class()) {
3923 int old = nonstatic_fields_start;
3924 nonstatic_fields_start = align_up(nonstatic_fields_start, BytesPerLong);
3925 initial_value_type_padding = nonstatic_fields_start - old;
3926 }
3927
3928 int next_nonstatic_field_offset = nonstatic_fields_start;
3929
3930 const bool is_contended_class = parsed_annotations->is_contended();
3931
3932 // Class is contended, pad before all the fields
3933 if (is_contended_class) {
3934 next_nonstatic_field_offset += ContendedPaddingWidth;
3935 }
3936
3937 // Temporary value types restrictions
3938 if (is_value_type() || is_value_capable_class()) {
3939 if (is_contended_class) {
3940 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
3941 return;
3942 }
3943 }
3944
3945 // Compute the non-contended fields count.
3946 // The packing code below relies on these counts to determine if some field
3947 // can be squeezed into the alignment gap. Contended fields are obviously
3948 // exempt from that.
3949 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3950 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3951 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3952 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3953 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3954
3955 int static_value_type_count = 0;
3956 int nonstatic_value_type_count = 0;
3957 int* nonstatic_value_type_indexes = NULL;
3958 Klass** nonstatic_value_type_klasses = NULL;
3959 unsigned int value_type_oop_map_count = 0;
3960
3961 int max_nonstatic_value_type = fac->count[NONSTATIC_VALUETYPE] + 1;
3962
3963 nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int,
3964 max_nonstatic_value_type);
3965 for (int i = 0; i < max_nonstatic_value_type; i++) {
3966 nonstatic_value_type_indexes[i] = -1;
3967 }
3968 nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*,
3969 max_nonstatic_value_type);
3970
3971 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3972 if (fs.allocation_type() == STATIC_VALUETYPE) {
3973 static_value_type_count++;
3974 } else if (fs.allocation_type() == NONSTATIC_VALUETYPE) {
3975 Symbol* signature = fs.signature();
3976 Klass* klass = SystemDictionary::resolve_or_fail(signature,
3977 Handle(THREAD, _loader_data->class_loader()),
3978 _protection_domain, true, CHECK);
3979 assert(klass != NULL, "Sanity check");
3980 assert(klass->access_flags().is_value_type(), "Value type expected");
3981 nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index();
3982 nonstatic_value_type_klasses[nonstatic_value_type_count] = klass;
3983 nonstatic_value_type_count++;
3984
3985 ValueKlass* vklass = ValueKlass::cast(klass);
3986 if (vklass->contains_oops()) {
3987 value_type_oop_map_count += vklass->nonstatic_oop_map_count();
3988 }
3989 }
3990 }
3991
3992 // Total non-static fields count, including every contended field
3993 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3994 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3995 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_VALUETYPE];
3996
3997 const bool super_has_nonstatic_fields =
3998 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3999 const bool has_nonstatic_fields =
4000 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4001 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
4002
4003 if (is_value_type() && (!has_nonstatic_fields)) {
4004 // There are a number of fixes required throughout the type system and JIT
4005 if (class_name() != vmSymbols::java_lang____Value()) {
4006 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support zero instance size yet");
4007 }
4008 }
4009
4010 // Prepare list of oops for oop map generation.
4011 //
4012 // "offset" and "count" lists are describing the set of contiguous oop
4013 // regions. offset[i] is the start of the i-th region, which then has
4014 // count[i] oops following. Before we know how many regions are required,
4015 // we pessimistically allocate the maps to fit all the oops into the
4016 // distinct regions.
4017 //
4018 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
4019 int max_oop_map_count =
4020 super_oop_map_count +
4021 fac->count[NONSTATIC_OOP] +
4022 value_type_oop_map_count;
4023
4024 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD);
4025 if (super_oop_map_count > 0) {
4026 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
4027 _super_klass->nonstatic_oop_map_count());
4028 }
4029
4030 int first_nonstatic_oop_offset = 0; // will be set for first oop field
4031
4032 bool compact_fields = CompactFields;
4033 int allocation_style = FieldsAllocationStyle;
4034 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4035 assert(false, "0 <= FieldsAllocationStyle <= 2");
4036 allocation_style = 1; // Optimistic
4037 }
4038
4039 // The next classes have predefined hard-coded fields offsets
4040 // (see in JavaClasses::compute_hard_coded_offsets()).
4041 // Use default fields allocation order for them.
4042 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4043 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4044 _class_name == vmSymbols::java_lang_Class() ||
4045 _class_name == vmSymbols::java_lang_ClassLoader() ||
4046 _class_name == vmSymbols::java_lang_ref_Reference() ||
4047 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4048 _class_name == vmSymbols::java_lang_StackTraceElement() ||
4049 _class_name == vmSymbols::java_lang_String() ||
4050 _class_name == vmSymbols::java_lang_Throwable() ||
4051 _class_name == vmSymbols::java_lang_Boolean() ||
4052 _class_name == vmSymbols::java_lang_Character() ||
4053 _class_name == vmSymbols::java_lang_Float() ||
4054 _class_name == vmSymbols::java_lang_Double() ||
4055 _class_name == vmSymbols::java_lang_Byte() ||
4056 _class_name == vmSymbols::java_lang_Short() ||
4057 _class_name == vmSymbols::java_lang_Integer() ||
4058 _class_name == vmSymbols::java_lang_Long())) {
4059 allocation_style = 0; // Allocate oops first
4060 compact_fields = false; // Don't compact fields
4061 }
4062
4063 int next_nonstatic_oop_offset = 0;
4064 int next_nonstatic_double_offset = 0;
4065
4066 // Rearrange fields for a given allocation style
4067 if( allocation_style == 0 ) {
4068 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4069 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4070 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4071 (nonstatic_oop_count * heapOopSize);
4072 } else if( allocation_style == 1 ) {
4073 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4074 next_nonstatic_double_offset = next_nonstatic_field_offset;
4075 } else if( allocation_style == 2 ) {
4076 // Fields allocation: oops fields in super and sub classes are together.
4077 if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) {
4078 if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) {
4079 allocation_style = 0; // allocate oops first
4080 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4081 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4082 (nonstatic_oop_count * heapOopSize);
4083 }
4084 }
4085 if( allocation_style == 2 ) {
4086 allocation_style = 1; // allocate oops last
4087 next_nonstatic_double_offset = next_nonstatic_field_offset;
4088 }
4089 } else {
4090 ShouldNotReachHere();
4091 }
4092
4093 int nonstatic_oop_space_count = 0;
4094 int nonstatic_word_space_count = 0;
4095 int nonstatic_short_space_count = 0;
4096 int nonstatic_byte_space_count = 0;
4097 int nonstatic_oop_space_offset = 0;
4098 int nonstatic_word_space_offset = 0;
4099 int nonstatic_short_space_offset = 0;
4100 int nonstatic_byte_space_offset = 0;
4101
4102 // Try to squeeze some of the fields into the gaps due to
4103 // long/double alignment.
4104 if (nonstatic_double_count > 0) {
4105 int offset = next_nonstatic_double_offset;
4106 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4107 if (compact_fields && offset != next_nonstatic_double_offset) {
4108 // Allocate available fields into the gap before double field.
4109 int length = next_nonstatic_double_offset - offset;
4110 assert(length == BytesPerInt, "");
4111 nonstatic_word_space_offset = offset;
4112 if (nonstatic_word_count > 0) {
4113 nonstatic_word_count -= 1;
4114 nonstatic_word_space_count = 1; // Only one will fit
4115 length -= BytesPerInt;
4116 offset += BytesPerInt;
4117 }
4118 nonstatic_short_space_offset = offset;
4119 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4120 nonstatic_short_count -= 1;
4121 nonstatic_short_space_count += 1;
4122 length -= BytesPerShort;
4123 offset += BytesPerShort;
4124 }
4125 nonstatic_byte_space_offset = offset;
4126 while (length > 0 && nonstatic_byte_count > 0) {
4127 nonstatic_byte_count -= 1;
4128 nonstatic_byte_space_count += 1;
4129 length -= 1;
4130 }
4131 // Allocate oop field in the gap if there are no other fields for that.
4132 nonstatic_oop_space_offset = offset;
4133 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4134 allocation_style != 0) { // when oop fields not first
4135 nonstatic_oop_count -= 1;
4136 nonstatic_oop_space_count = 1; // Only one will fit
4137 length -= heapOopSize;
4138 offset += heapOopSize;
4139 }
4140 }
4141 }
4142
4143 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4144 (nonstatic_double_count * BytesPerLong);
4145 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4146 (nonstatic_word_count * BytesPerInt);
4147 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4148 (nonstatic_short_count * BytesPerShort);
4149 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4150 nonstatic_byte_count;
4151
4152 // let oops jump before padding with this allocation style
4153 if( allocation_style == 1 ) {
4154 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4155 if( nonstatic_oop_count > 0 ) {
4156 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4157 }
4158 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4159 }
4160
4161 // Aligning embedded value types
4162 // bug below, the current algorithm to layout embedded value types always put them at the
4163 // end of the layout, which doesn't match the different allocation policies the VM is
4164 // supposed to provide => FixMe
4165 // Note also that the current alignment policy is to make each value type starting on a
4166 // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4167 // align value types according to their most constrained internal type.
4168 next_nonstatic_valuetype_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4169 int next_value_type_index = 0;
4170
4171 // Iterate over fields again and compute correct offsets.
4172 // The field allocation type was temporarily stored in the offset slot.
4173 // oop fields are located before non-oop fields (static and non-static).
4174 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4175
4176 // skip already laid out fields
4177 if (fs.is_offset_set()) continue;
4178
4179 // contended instance fields are handled below
4180 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4181
4182 int real_offset = 0;
4183 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4184
4185 // pack the rest of the fields
4186 switch (atype) {
4187 // Value types in static fields are handled with oops
4188 case STATIC_VALUETYPE: // Fallthrough
4189 case STATIC_OOP:
4190 real_offset = next_static_oop_offset;
4191 next_static_oop_offset += heapOopSize;
4192 break;
4193 case STATIC_BYTE:
4194 real_offset = next_static_byte_offset;
4195 next_static_byte_offset += 1;
4196 break;
4197 case STATIC_SHORT:
4198 real_offset = next_static_short_offset;
4199 next_static_short_offset += BytesPerShort;
4200 break;
4201 case STATIC_WORD:
4202 real_offset = next_static_word_offset;
4203 next_static_word_offset += BytesPerInt;
4204 break;
4205 case STATIC_DOUBLE:
4206 real_offset = next_static_double_offset;
4207 next_static_double_offset += BytesPerLong;
4208 break;
4209 case NONSTATIC_VALUETYPE:
4210 {
4211 Klass* klass = nonstatic_value_type_klasses[next_value_type_index];
4212 assert(klass != NULL, "Klass should have been loaded and resolved earlier");
4213 assert(klass->access_flags().is_value_type(),"Must be a value type");
4214 ValueKlass* vklass = ValueKlass::cast(klass);
4215 real_offset = next_nonstatic_valuetype_offset;
4216 next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset();
4217 // aligning next value type on a 64 bits boundary
4218 next_nonstatic_valuetype_offset = align_up(next_nonstatic_valuetype_offset, BytesPerLong);
4219 next_value_type_index += 1;
4220
4221 if (vklass->contains_oops()) { // add flatten oop maps
4222 int diff = real_offset - vklass->first_field_offset();
4223 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4224 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4225 while (map < last_map) {
4226 nonstatic_oop_maps->add(map->offset() + diff, map->count());
4227 map++;
4228 }
4229 }
4230 }
4231 break;
4232 case NONSTATIC_OOP:
4233 if( nonstatic_oop_space_count > 0 ) {
4234 real_offset = nonstatic_oop_space_offset;
4235 nonstatic_oop_space_offset += heapOopSize;
4236 nonstatic_oop_space_count -= 1;
4237 } else {
4238 real_offset = next_nonstatic_oop_offset;
4239 next_nonstatic_oop_offset += heapOopSize;
4240 }
4241 nonstatic_oop_maps->add(real_offset, 1);
4242 break;
4243 case NONSTATIC_BYTE:
4244 if( nonstatic_byte_space_count > 0 ) {
4245 real_offset = nonstatic_byte_space_offset;
4246 nonstatic_byte_space_offset += 1;
4247 nonstatic_byte_space_count -= 1;
4248 } else {
4249 real_offset = next_nonstatic_byte_offset;
4250 next_nonstatic_byte_offset += 1;
4251 }
4252 break;
4253 case NONSTATIC_SHORT:
4254 if( nonstatic_short_space_count > 0 ) {
4255 real_offset = nonstatic_short_space_offset;
4256 nonstatic_short_space_offset += BytesPerShort;
4257 nonstatic_short_space_count -= 1;
4258 } else {
4259 real_offset = next_nonstatic_short_offset;
4260 next_nonstatic_short_offset += BytesPerShort;
4261 }
4262 break;
4263 case NONSTATIC_WORD:
4264 if( nonstatic_word_space_count > 0 ) {
4265 real_offset = nonstatic_word_space_offset;
4266 nonstatic_word_space_offset += BytesPerInt;
4267 nonstatic_word_space_count -= 1;
4268 } else {
4269 real_offset = next_nonstatic_word_offset;
4270 next_nonstatic_word_offset += BytesPerInt;
4271 }
4272 break;
4273 case NONSTATIC_DOUBLE:
4274 real_offset = next_nonstatic_double_offset;
4275 next_nonstatic_double_offset += BytesPerLong;
4276 break;
4277 default:
4278 ShouldNotReachHere();
4279 }
4280 fs.set_offset(real_offset);
4281 }
4282
4283
4284 // Handle the contended cases.
4285 //
4286 // Each contended field should not intersect the cache line with another contended field.
4287 // In the absence of alignment information, we end up with pessimistically separating
4288 // the fields with full-width padding.
4289 //
4290 // Additionally, this should not break alignment for the fields, so we round the alignment up
4291 // for each field.
4292 if (nonstatic_contended_count > 0) {
4293
4294 // if there is at least one contended field, we need to have pre-padding for them
4295 next_nonstatic_padded_offset += ContendedPaddingWidth;
4296
4297 // collect all contended groups
4298 ResourceBitMap bm(cp->size());
4299 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4300 // skip already laid out fields
4301 if (fs.is_offset_set()) continue;
4302
4303 if (fs.is_contended()) {
4304 bm.set_bit(fs.contended_group());
4305 }
4306 }
4307
4308 int current_group = -1;
4309 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4310
4311 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4312
4313 // skip already laid out fields
4314 if (fs.is_offset_set()) continue;
4315
4316 // skip non-contended fields and fields from different group
4317 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4318
4319 // handle statics below
4320 if (fs.access_flags().is_static()) continue;
4321
4322 int real_offset = 0;
4323 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4324
4325 switch (atype) {
4326 case NONSTATIC_BYTE:
4327 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4328 real_offset = next_nonstatic_padded_offset;
4329 next_nonstatic_padded_offset += 1;
4330 break;
4331
4332 case NONSTATIC_SHORT:
4333 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4334 real_offset = next_nonstatic_padded_offset;
4335 next_nonstatic_padded_offset += BytesPerShort;
4336 break;
4337
4338 case NONSTATIC_WORD:
4339 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4340 real_offset = next_nonstatic_padded_offset;
4341 next_nonstatic_padded_offset += BytesPerInt;
4342 break;
4343
4344 case NONSTATIC_DOUBLE:
4345 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4346 real_offset = next_nonstatic_padded_offset;
4347 next_nonstatic_padded_offset += BytesPerLong;
4348 break;
4349
4350 // Value types in static fields are handled with oops
4351 case NONSTATIC_VALUETYPE:
4352 throwValueTypeLimitation(THREAD_AND_LOCATION,
4353 "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4354 return;
4355
4356 case NONSTATIC_OOP:
4357 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4358 real_offset = next_nonstatic_padded_offset;
4359 next_nonstatic_padded_offset += heapOopSize;
4360 nonstatic_oop_maps->add(real_offset, 1);
4361 break;
4362
4363 default:
4364 ShouldNotReachHere();
4365 }
4366
4367 if (fs.contended_group() == 0) {
4368 // Contended group defines the equivalence class over the fields:
4369 // the fields within the same contended group are not inter-padded.
4370 // The only exception is default group, which does not incur the
4371 // equivalence, and so requires intra-padding.
4372 next_nonstatic_padded_offset += ContendedPaddingWidth;
4373 }
4374
4375 fs.set_offset(real_offset);
4376 } // for
4377
4378 // Start laying out the next group.
4379 // Note that this will effectively pad the last group in the back;
4380 // this is expected to alleviate memory contention effects for
4381 // subclass fields and/or adjacent object.
4382 // If this was the default group, the padding is already in place.
4383 if (current_group != 0) {
4384 next_nonstatic_padded_offset += ContendedPaddingWidth;
4385 }
4386 }
4387
4388 // handle static fields
4389 }
4390
4391 // Entire class is contended, pad in the back.
4392 // This helps to alleviate memory contention effects for subclass fields
4393 // and/or adjacent object.
4394 if (is_contended_class) {
4395 assert(!is_value_type() && !is_value_capable_class(), "@Contended not supported for value types yet");
4396 next_nonstatic_padded_offset += ContendedPaddingWidth;
4397 }
4398
4399 int notaligned_nonstatic_fields_end;
4400 if (nonstatic_value_type_count != 0) {
4401 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4402 } else {
4403 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4404 }
4405
4406 int nonstatic_field_sz_align = heapOopSize;
4407 if (is_value_type() || is_value_capable_class()) {
4408 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4409 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4410 }
4411 }
4412 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4413 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4414 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4415
4416 int static_field_size = (static_fields_end -
4417 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4418 nonstatic_field_size = nonstatic_field_size +
4419 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4420
4421 int instance_size = align_object_size(instance_end / wordSize);
4422
4423 assert(instance_size == align_object_size(align_up(
4424 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4425 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4426
4427
4428 // Invariant: nonstatic_field end/start should only change if there are
4429 // nonstatic fields in the class, or if the class is contended. We compare
4430 // against the non-aligned value, so that end alignment will not fail the
4431 // assert without actually having the fields.
4432 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4433 is_contended_class ||
4434 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4435
4436 // Number of non-static oop map blocks allocated at end of klass.
4437 nonstatic_oop_maps->compact(THREAD);
4438
4439 #ifndef PRODUCT
4440 if ((PrintFieldLayout && !is_value_type()) ||
4441 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4442 print_field_layout(_class_name,
4443 _fields,
4444 cp,
4445 instance_size,
4446 nonstatic_fields_start,
4447 nonstatic_fields_end,
4448 static_fields_end);
4449 nonstatic_oop_maps->print_on(tty);
4450 tty->print("\n");
4451 }
4452
4453 #endif
4454 // Pass back information needed for InstanceKlass creation
4455 info->oop_map_blocks = nonstatic_oop_maps;
4456 info->instance_size = instance_size;
4457 info->static_field_size = static_field_size;
4458 info->nonstatic_field_size = nonstatic_field_size;
4459 info->has_nonstatic_fields = has_nonstatic_fields;
4460 }
4461
4462 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4463 assert(ik != NULL, "invariant");
4464
4465 const Klass* const super = ik->super();
4466
4467 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4468 // in which case we don't have to register objects as finalizable
4469 if (!_has_empty_finalizer) {
4470 if (_has_finalizer ||
4471 (super != NULL && super->has_finalizer())) {
4472 ik->set_has_finalizer();
4473 }
4474 }
4475
4476 #ifdef ASSERT
4477 bool f = false;
4478 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4479 vmSymbols::void_method_signature());
4480 if (m != NULL && !m->is_empty_method()) {
4481 f = true;
4482 }
4483
4484 // Spec doesn't prevent agent from redefinition of empty finalizer.
4485 // Despite the fact that it's generally bad idea and redefined finalizer
4486 // will not work as expected we shouldn't abort vm in this case
4487 if (!ik->has_redefined_this_or_super()) {
4488 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4489 }
4490 #endif
4491
4492 // Check if this klass supports the java.lang.Cloneable interface
4493 if (SystemDictionary::Cloneable_klass_loaded()) {
4494 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4495 ik->set_is_cloneable();
4496 }
4497 }
4498
4499 // Check if this klass has a vanilla default constructor
4500 if (super == NULL) {
4501 // java.lang.Object has empty default constructor
4502 ik->set_has_vanilla_constructor();
4503 } else {
4504 if (super->has_vanilla_constructor() &&
4505 _has_vanilla_constructor) {
4506 ik->set_has_vanilla_constructor();
4507 }
4508 #ifdef ASSERT
4509 bool v = false;
4510 if (super->has_vanilla_constructor()) {
4511 const Method* const constructor =
4512 ik->find_method(vmSymbols::object_initializer_name(),
4513 vmSymbols::void_method_signature());
4514 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4515 v = true;
4516 }
4517 }
4518 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4519 #endif
4520 }
4521
4522 // If it cannot be fast-path allocated, set a bit in the layout helper.
4523 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4524 assert(ik->size_helper() > 0, "layout_helper is initialized");
4525 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4526 || ik->is_abstract() || ik->is_interface()
4527 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4528 || ik->size_helper() >= FastAllocateSizeLimit) {
4529 // Forbid fast-path allocation.
4530 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4531 ik->set_layout_helper(lh);
4532 }
4533 }
4534
4535 bool ClassFileParser::supports_value_types() const {
4536 // Value types are only supported by class file version 53.1 and later
4537 return _major_version > JAVA_9_VERSION || (_major_version == JAVA_9_VERSION && _minor_version >= 1);
4538 }
4539
4540 // Attach super classes and interface classes to class loader data
4541 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4542 TRAPS) {
4543 assert(defined_klass != NULL, "invariant");
4544
4545 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4546 if (defining_loader_data->is_the_null_class_loader_data()) {
4547 // Dependencies to null class loader data are implicit.
4548 return;
4549 } else {
4550 // add super class dependency
4551 Klass* const super = defined_klass->super();
4552 if (super != NULL) {
4553 defining_loader_data->record_dependency(super, CHECK);
4554 }
4555
4556 // add super interface dependencies
4557 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4558 if (local_interfaces != NULL) {
4559 const int length = local_interfaces->length();
4560 for (int i = 0; i < length; i++) {
4561 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4562 }
4563 }
4564
4565 for (FieldStream st((InstanceKlass*)defined_klass, false, false); !st.eos(); st.next()) {
4566 Symbol* signature = st.signature();
4567 if (signature->starts_with("Q")) {
4568 Klass* klass = SystemDictionary::resolve_or_fail(signature,
4569 Handle(THREAD, defined_klass->class_loader()),
4570 Handle(THREAD, defined_klass->protection_domain()), true, CHECK);
4571 assert(klass != NULL, "Sanity check");
4572 assert(klass->access_flags().is_value_type(), "Value type expected");
4573 defining_loader_data->record_dependency(klass, CHECK);
4574 }
4575 }
4576 }
4577 }
4578
4579 // utility methods for appending an array with check for duplicates
4580
4581 static void append_interfaces(GrowableArray<Klass*>* result,
4582 const Array<Klass*>* const ifs) {
4583 // iterate over new interfaces
4584 for (int i = 0; i < ifs->length(); i++) {
4585 Klass* const e = ifs->at(i);
4586 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4587 // add new interface
4588 result->append_if_missing(e);
4589 }
4590 }
4591
4592 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4593 Array<Klass*>* local_ifs,
4594 ClassLoaderData* loader_data,
4595 TRAPS) {
4596 assert(local_ifs != NULL, "invariant");
4597 assert(loader_data != NULL, "invariant");
4598
4599 // Compute maximum size for transitive interfaces
4600 int max_transitive_size = 0;
4601 int super_size = 0;
4602 // Add superclass transitive interfaces size
4603 if (super != NULL) {
4604 super_size = super->transitive_interfaces()->length();
4605 max_transitive_size += super_size;
4606 }
4607 // Add local interfaces' super interfaces
4608 const int local_size = local_ifs->length();
4609 for (int i = 0; i < local_size; i++) {
4610 Klass* const l = local_ifs->at(i);
4611 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4612 }
4613 // Finally add local interfaces
4614 max_transitive_size += local_size;
4615 // Construct array
4616 if (max_transitive_size == 0) {
4617 // no interfaces, use canonicalized array
4618 return Universe::the_empty_klass_array();
4619 } else if (max_transitive_size == super_size) {
4620 // no new local interfaces added, share superklass' transitive interface array
4621 return super->transitive_interfaces();
4622 } else if (max_transitive_size == local_size) {
4623 // only local interfaces added, share local interface array
4624 return local_ifs;
4625 } else {
4626 ResourceMark rm;
4627 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4628
4629 // Copy down from superclass
4630 if (super != NULL) {
4631 append_interfaces(result, super->transitive_interfaces());
4632 }
4633
4634 // Copy down from local interfaces' superinterfaces
4635 for (int i = 0; i < local_size; i++) {
4636 Klass* const l = local_ifs->at(i);
4637 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4638 }
4639 // Finally add local interfaces
4640 append_interfaces(result, local_ifs);
4641
4642 // length will be less than the max_transitive_size if duplicates were removed
4643 const int length = result->length();
4644 assert(length <= max_transitive_size, "just checking");
4645 Array<Klass*>* const new_result =
4646 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4647 for (int i = 0; i < length; i++) {
4648 Klass* const e = result->at(i);
4649 assert(e != NULL, "just checking");
4650 new_result->at_put(i, e);
4651 }
4652 return new_result;
4653 }
4654 }
4655
4656 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4657 assert(this_klass != NULL, "invariant");
4658 const Klass* const super = this_klass->super();
4659 if (super != NULL) {
4660
4661 // If the loader is not the boot loader then throw an exception if its
4662 // superclass is in package jdk.internal.reflect and its loader is not a
4663 // special reflection class loader
4664 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4665 assert(super->is_instance_klass(), "super is not instance klass");
4666 PackageEntry* super_package = super->package();
4667 if (super_package != NULL &&
4668 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4669 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4670 ResourceMark rm(THREAD);
4671 Exceptions::fthrow(
4672 THREAD_AND_LOCATION,
4673 vmSymbols::java_lang_IllegalAccessError(),
4674 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4675 this_klass->external_name(),
4676 this_klass->class_loader_data()->loader_name(),
4677 super->external_name());
4678 return;
4679 }
4680 }
4681
4682 Reflection::VerifyClassAccessResults vca_result =
4683 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4684 if (vca_result != Reflection::ACCESS_OK) {
4685 ResourceMark rm(THREAD);
4686 char* msg = Reflection::verify_class_access_msg(this_klass,
4687 InstanceKlass::cast(super),
4688 vca_result);
4689 if (msg == NULL) {
4690 Exceptions::fthrow(
4691 THREAD_AND_LOCATION,
4692 vmSymbols::java_lang_IllegalAccessError(),
4693 "class %s cannot access its superclass %s",
4694 this_klass->external_name(),
4695 super->external_name());
4696 } else {
4697 // Add additional message content.
4698 Exceptions::fthrow(
4699 THREAD_AND_LOCATION,
4700 vmSymbols::java_lang_IllegalAccessError(),
4701 "superclass access check failed: %s",
4702 msg);
4703 }
4704 }
4705 }
4706 }
4707
4708
4709 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4710 assert(this_klass != NULL, "invariant");
4711 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4712 const int lng = local_interfaces->length();
4713 for (int i = lng - 1; i >= 0; i--) {
4714 Klass* const k = local_interfaces->at(i);
4715 assert (k != NULL && k->is_interface(), "invalid interface");
4716 Reflection::VerifyClassAccessResults vca_result =
4717 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4718 if (vca_result != Reflection::ACCESS_OK) {
4719 ResourceMark rm(THREAD);
4720 char* msg = Reflection::verify_class_access_msg(this_klass,
4721 InstanceKlass::cast(k),
4722 vca_result);
4723 if (msg == NULL) {
4724 Exceptions::fthrow(
4725 THREAD_AND_LOCATION,
4726 vmSymbols::java_lang_IllegalAccessError(),
4727 "class %s cannot access its superinterface %s",
4728 this_klass->external_name(),
4729 k->external_name());
4730 } else {
4731 // Add additional message content.
4732 Exceptions::fthrow(
4733 THREAD_AND_LOCATION,
4734 vmSymbols::java_lang_IllegalAccessError(),
4735 "superinterface check failed: %s",
4736 msg);
4737 }
4738 }
4739 }
4740 }
4741
4742
4743 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4744 assert(this_klass != NULL, "invariant");
4745 const Array<Method*>* const methods = this_klass->methods();
4746 const int num_methods = methods->length();
4747
4748 // go thru each method and check if it overrides a final method
4749 for (int index = 0; index < num_methods; index++) {
4750 const Method* const m = methods->at(index);
4751
4752 // skip private, static, and <init> methods
4753 if ((!m->is_private() && !m->is_static()) &&
4754 (m->name() != vmSymbols::object_initializer_name())) {
4755
4756 const Symbol* const name = m->name();
4757 const Symbol* const signature = m->signature();
4758 const Klass* k = this_klass->super();
4759 const Method* super_m = NULL;
4760 while (k != NULL) {
4761 // skip supers that don't have final methods.
4762 if (k->has_final_method()) {
4763 // lookup a matching method in the super class hierarchy
4764 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4765 if (super_m == NULL) {
4766 break; // didn't find any match; get out
4767 }
4768
4769 if (super_m->is_final() && !super_m->is_static() &&
4770 // matching method in super is final, and not static
4771 (Reflection::verify_field_access(this_klass,
4772 super_m->method_holder(),
4773 super_m->method_holder(),
4774 super_m->access_flags(), false))
4775 // this class can access super final method and therefore override
4776 ) {
4777 ResourceMark rm(THREAD);
4778 Exceptions::fthrow(
4779 THREAD_AND_LOCATION,
4780 vmSymbols::java_lang_VerifyError(),
4781 "class %s overrides final method %s.%s%s",
4782 this_klass->external_name(),
4783 super_m->method_holder()->external_name(),
4784 name->as_C_string(),
4785 signature->as_C_string()
4786 );
4787 return;
4788 }
4789
4790 // continue to look from super_m's holder's super.
4791 k = super_m->method_holder()->super();
4792 continue;
4793 }
4794
4795 k = k->super();
4796 }
4797 }
4798 }
4799 }
4800
4801
4802 // assumes that this_klass is an interface
4803 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4804 assert(this_klass != NULL, "invariant");
4805 assert(this_klass->is_interface(), "not an interface");
4806 const Array<Method*>* methods = this_klass->methods();
4807 const int num_methods = methods->length();
4808
4809 for (int index = 0; index < num_methods; index++) {
4810 const Method* const m = methods->at(index);
4811 // if m is static and not the init method, throw a verify error
4812 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4813 ResourceMark rm(THREAD);
4814 Exceptions::fthrow(
4815 THREAD_AND_LOCATION,
4816 vmSymbols::java_lang_VerifyError(),
4817 "Illegal static method %s in interface %s",
4818 m->name()->as_C_string(),
4819 this_klass->external_name()
4820 );
4821 return;
4822 }
4823 }
4824 }
4825
4826 // utility methods for format checking
4827
4828 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4829 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4830 const bool is_value_type = (flags & JVM_ACC_VALUE) != 0;
4831 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4832 assert(supports_value_types() || !is_value_type, "JVM_ACC_VALUE should not be set");
4833 if (is_module) {
4834 ResourceMark rm(THREAD);
4835 Exceptions::fthrow(
4836 THREAD_AND_LOCATION,
4837 vmSymbols::java_lang_NoClassDefFoundError(),
4838 "%s is not a class because access_flag ACC_MODULE is set",
4839 _class_name->as_C_string());
4840 return;
4841 }
4842
4843 if (!_need_verify) { return; }
4844
4845 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4846 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4847 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4848 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4849 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4850 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4851 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4852
4853 if ((is_abstract && is_final) ||
4854 (is_interface && !is_abstract) ||
4855 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4856 (!is_interface && major_gte_15 && is_annotation)) {
4857 ResourceMark rm(THREAD);
4858 Exceptions::fthrow(
4859 THREAD_AND_LOCATION,
4860 vmSymbols::java_lang_ClassFormatError(),
4861 "Illegal class modifiers in class %s: 0x%X",
4862 _class_name->as_C_string(), flags
4863 );
4864 return;
4865 }
4866 }
4867
4868 static bool has_illegal_visibility(jint flags) {
4869 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4870 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4871 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4872
4873 return ((is_public && is_protected) ||
4874 (is_public && is_private) ||
4875 (is_protected && is_private));
4876 }
4877
4878 static bool is_supported_version(u2 major, u2 minor) {
4879 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4880 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4881 (major <= max_version) &&
4882 ((major != max_version) ||
4883 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4884 }
4885
4886 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4887 bool is_interface,
4888 TRAPS) const {
4889 if (!_need_verify) { return; }
4890
4891 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4892 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4893 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4894 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4895 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4896 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4897 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4898 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4899 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4900
4901 bool is_illegal = false;
4902
4903 if (is_interface) {
4904 if (!is_public || !is_static || !is_final || is_private ||
4905 is_protected || is_volatile || is_transient ||
4906 (major_gte_15 && is_enum)) {
4907 is_illegal = true;
4908 }
4909 } else { // not interface
4910 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4911 is_illegal = true;
4912 }
4913 }
4914
4915 if (is_illegal) {
4916 ResourceMark rm(THREAD);
4917 Exceptions::fthrow(
4918 THREAD_AND_LOCATION,
4919 vmSymbols::java_lang_ClassFormatError(),
4920 "Illegal field modifiers in class %s: 0x%X",
4921 _class_name->as_C_string(), flags);
4922 return;
4923 }
4924 }
4925
4926 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4927 bool is_interface,
4928 const Symbol* name,
4929 TRAPS) const {
4930 if (!_need_verify) { return; }
4931
4932 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4933 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4934 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4935 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4936 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4937 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4938 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4939 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4940 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4941 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4942 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4943 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4944 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4945
4946 bool is_illegal = false;
4947
4948 if (is_interface) {
4949 if (major_gte_8) {
4950 // Class file version is JAVA_8_VERSION or later Methods of
4951 // interfaces may set any of the flags except ACC_PROTECTED,
4952 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4953 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4954 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4955 (is_native || is_protected || is_final || is_synchronized) ||
4956 // If a specific method of a class or interface has its
4957 // ACC_ABSTRACT flag set, it must not have any of its
4958 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4959 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4960 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4961 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4962 (is_abstract && (is_private || is_static || is_strict))) {
4963 is_illegal = true;
4964 }
4965 } else if (major_gte_15) {
4966 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4967 if (!is_public || is_private || is_protected || is_static || is_final ||
4968 is_synchronized || is_native || !is_abstract || is_strict) {
4969 is_illegal = true;
4970 }
4971 } else {
4972 // Class file version is pre-JAVA_1_5_VERSION
4973 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4974 is_illegal = true;
4975 }
4976 }
4977 } else { // not interface
4978 if (has_illegal_visibility(flags)) {
4979 is_illegal = true;
4980 } else {
4981 if (is_initializer) {
4982 if (is_static || is_final || is_synchronized || is_native ||
4983 is_abstract || (major_gte_15 && is_bridge)) {
4984 is_illegal = true;
4985 }
4986 } else { // not initializer
4987 if (is_abstract) {
4988 if ((is_final || is_native || is_private || is_static ||
4989 (major_gte_15 && (is_synchronized || is_strict)))) {
4990 is_illegal = true;
4991 }
4992 }
4993 }
4994 }
4995 }
4996
4997 if (is_illegal) {
4998 ResourceMark rm(THREAD);
4999 Exceptions::fthrow(
5000 THREAD_AND_LOCATION,
5001 vmSymbols::java_lang_ClassFormatError(),
5002 "Method %s in class %s has illegal modifiers: 0x%X",
5003 name->as_C_string(), _class_name->as_C_string(), flags);
5004 return;
5005 }
5006 }
5007
5008 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5009 int length,
5010 TRAPS) const {
5011 assert(_need_verify, "only called when _need_verify is true");
5012 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5013 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5014 }
5015 }
5016
5017 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5018 // In class names, '/' separates unqualified names. This is verified in this function also.
5019 // Method names also may not contain the characters '<' or '>', unless <init>
5020 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5021 // method. Because these names have been checked as special cases before
5022 // calling this method in verify_legal_method_name.
5023 //
5024 // This method is also called from the modular system APIs in modules.cpp
5025 // to verify the validity of module and package names.
5026 bool ClassFileParser::verify_unqualified_name(const char* name,
5027 unsigned int length,
5028 int type) {
5029 for (const char* p = name; p != name + length;) {
5030 jchar ch = *p;
5031 if (ch < 128) {
5032 if (ch == '.' || ch == ';' || ch == '[' ) {
5033 return false; // do not permit '.', ';', or '['
5034 }
5035 if (ch == '/') {
5036 // check for '//' or leading or trailing '/' which are not legal
5037 // unqualified name must not be empty
5038 if (type == ClassFileParser::LegalClass) {
5039 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5040 return false;
5041 }
5042 } else {
5043 return false; // do not permit '/' unless it's class name
5044 }
5045 }
5046 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5047 return false; // do not permit '<' or '>' in method names
5048 }
5049 p++;
5050 } else {
5051 char* tmp_p = UTF8::next(p, &ch);
5052 p = tmp_p;
5053 }
5054 }
5055 return true;
5056 }
5057
5058 // Take pointer to a string. Skip over the longest part of the string that could
5059 // be taken as a fieldname. Allow '/' if slash_ok is true.
5060 // Return a pointer to just past the fieldname.
5061 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5062 // being true, we saw consecutive slashes (meaning we were looking for a
5063 // qualified path but found something that was badly-formed).
5064 static const char* skip_over_field_name(const char* name,
5065 bool slash_ok,
5066 unsigned int length) {
5067 const char* p;
5068 jboolean last_is_slash = false;
5069 jboolean not_first_ch = false;
5070
5071 for (p = name; p != name + length; not_first_ch = true) {
5072 const char* old_p = p;
5073 jchar ch = *p;
5074 if (ch < 128) {
5075 p++;
5076 // quick check for ascii
5077 if ((ch >= 'a' && ch <= 'z') ||
5078 (ch >= 'A' && ch <= 'Z') ||
5079 (ch == '_' || ch == '$') ||
5080 (not_first_ch && ch >= '0' && ch <= '9')) {
5081 last_is_slash = false;
5082 continue;
5083 }
5084 if (slash_ok && ch == '/') {
5085 if (last_is_slash) {
5086 return NULL; // Don't permit consecutive slashes
5087 }
5088 last_is_slash = true;
5089 continue;
5090 }
5091 }
5092 else {
5093 jint unicode_ch;
5094 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5095 p = tmp_p;
5096 last_is_slash = false;
5097 // Check if ch is Java identifier start or is Java identifier part
5098 // 4672820: call java.lang.Character methods directly without generating separate tables.
5099 EXCEPTION_MARK;
5100
5101 // return value
5102 JavaValue result(T_BOOLEAN);
5103 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5104 JavaCallArguments args;
5105 args.push_int(unicode_ch);
5106
5107 // public static boolean isJavaIdentifierStart(char ch);
5108 JavaCalls::call_static(&result,
5109 SystemDictionary::Character_klass(),
5110 vmSymbols::isJavaIdentifierStart_name(),
5111 vmSymbols::int_bool_signature(),
5112 &args,
5113 THREAD);
5114
5115 if (HAS_PENDING_EXCEPTION) {
5116 CLEAR_PENDING_EXCEPTION;
5117 return 0;
5118 }
5119 if (result.get_jboolean()) {
5120 continue;
5121 }
5122
5123 if (not_first_ch) {
5124 // public static boolean isJavaIdentifierPart(char ch);
5125 JavaCalls::call_static(&result,
5126 SystemDictionary::Character_klass(),
5127 vmSymbols::isJavaIdentifierPart_name(),
5128 vmSymbols::int_bool_signature(),
5129 &args,
5130 THREAD);
5131
5132 if (HAS_PENDING_EXCEPTION) {
5133 CLEAR_PENDING_EXCEPTION;
5134 return 0;
5135 }
5136
5137 if (result.get_jboolean()) {
5138 continue;
5139 }
5140 }
5141 }
5142 return (not_first_ch) ? old_p : NULL;
5143 }
5144 return (not_first_ch) ? p : NULL;
5145 }
5146
5147 // Take pointer to a string. Skip over the longest part of the string that could
5148 // be taken as a field signature. Allow "void" if void_ok.
5149 // Return a pointer to just past the signature.
5150 // Return NULL if no legal signature is found.
5151 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5152 bool void_ok,
5153 unsigned int length,
5154 TRAPS) const {
5155 unsigned int array_dim = 0;
5156 while (length > 0) {
5157 switch (signature[0]) {
5158 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5159 case JVM_SIGNATURE_BOOLEAN:
5160 case JVM_SIGNATURE_BYTE:
5161 case JVM_SIGNATURE_CHAR:
5162 case JVM_SIGNATURE_SHORT:
5163 case JVM_SIGNATURE_INT:
5164 case JVM_SIGNATURE_FLOAT:
5165 case JVM_SIGNATURE_LONG:
5166 case JVM_SIGNATURE_DOUBLE:
5167 return signature + 1;
5168 case JVM_SIGNATURE_CLASS:
5169 case JVM_SIGNATURE_VALUE_CLASS: {
5170 if (_major_version < JAVA_1_5_VERSION) {
5171 // Skip over the class name if one is there
5172 const char* const p = skip_over_field_name(signature + 1, true, --length);
5173
5174 // The next character better be a semicolon
5175 if (p && (p - signature) > 1 && p[0] == ';') {
5176 return p + 1;
5177 }
5178 }
5179 else {
5180 // Skip leading 'L' and ignore first appearance of ';'
5181 length--;
5182 signature++;
5183 char* c = strchr((char*) signature, ';');
5184 // Format check signature
5185 if (c != NULL) {
5186 ResourceMark rm(THREAD);
5187 int newlen = c - (char*) signature;
5188 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5189 strncpy(sig, signature, newlen);
5190 sig[newlen] = '\0';
5191
5192 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5193 if (!legal) {
5194 classfile_parse_error("Class name contains illegal character "
5195 "in descriptor in class file %s",
5196 CHECK_0);
5197 return NULL;
5198 }
5199 return signature + newlen + 1;
5200 }
5201 }
5202 return NULL;
5203 }
5204 case JVM_SIGNATURE_ARRAY:
5205 array_dim++;
5206 if (array_dim > 255) {
5207 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5208 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5209 }
5210 // The rest of what's there better be a legal signature
5211 signature++;
5212 length--;
5213 void_ok = false;
5214 break;
5215 default:
5216 return NULL;
5217 }
5218 }
5219 return NULL;
5220 }
5221
5222 // Checks if name is a legal class name.
5223 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5224 if (!_need_verify || _relax_verify) { return; }
5225
5226 char buf[fixed_buffer_size];
5227 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5228 unsigned int length = name->utf8_length();
5229 bool legal = false;
5230
5231 if (length > 0) {
5232 const char* p;
5233 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5234 p = skip_over_field_signature(bytes, false, length, CHECK);
5235 legal = (p != NULL) && ((p - bytes) == (int)length);
5236 } else if (_major_version < JAVA_1_5_VERSION) {
5237 if (bytes[0] != '<') {
5238 p = skip_over_field_name(bytes, true, length);
5239 legal = (p != NULL) && ((p - bytes) == (int)length);
5240 }
5241 } else {
5242 // 4900761: relax the constraints based on JSR202 spec
5243 // Class names may be drawn from the entire Unicode character set.
5244 // Identifiers between '/' must be unqualified names.
5245 // The utf8 string has been verified when parsing cpool entries.
5246 legal = verify_unqualified_name(bytes, length, LegalClass);
5247 }
5248 }
5249 if (!legal) {
5250 ResourceMark rm(THREAD);
5251 assert(_class_name != NULL, "invariant");
5252 Exceptions::fthrow(
5253 THREAD_AND_LOCATION,
5254 vmSymbols::java_lang_ClassFormatError(),
5255 "Illegal class name \"%s\" in class file %s", bytes,
5256 _class_name->as_C_string()
5257 );
5258 return;
5259 }
5260 }
5261
5262 // Checks if name is a legal field name.
5263 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5264 if (!_need_verify || _relax_verify) { return; }
5265
5266 char buf[fixed_buffer_size];
5267 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5268 unsigned int length = name->utf8_length();
5269 bool legal = false;
5270
5271 if (length > 0) {
5272 if (_major_version < JAVA_1_5_VERSION) {
5273 if (bytes[0] != '<') {
5274 const char* p = skip_over_field_name(bytes, false, length);
5275 legal = (p != NULL) && ((p - bytes) == (int)length);
5276 }
5277 } else {
5278 // 4881221: relax the constraints based on JSR202 spec
5279 legal = verify_unqualified_name(bytes, length, LegalField);
5280 }
5281 }
5282
5283 if (!legal) {
5284 ResourceMark rm(THREAD);
5285 assert(_class_name != NULL, "invariant");
5286 Exceptions::fthrow(
5287 THREAD_AND_LOCATION,
5288 vmSymbols::java_lang_ClassFormatError(),
5289 "Illegal field name \"%s\" in class %s", bytes,
5290 _class_name->as_C_string()
5291 );
5292 return;
5293 }
5294 }
5295
5296 // Checks if name is a legal method name.
5297 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5298 if (!_need_verify || _relax_verify) { return; }
5299
5300 assert(name != NULL, "method name is null");
5301 char buf[fixed_buffer_size];
5302 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5303 unsigned int length = name->utf8_length();
5304 bool legal = false;
5305
5306 if (length > 0) {
5307 if (bytes[0] == '<') {
5308 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5309 legal = true;
5310 }
5311 } else if (_major_version < JAVA_1_5_VERSION) {
5312 const char* p;
5313 p = skip_over_field_name(bytes, false, length);
5314 legal = (p != NULL) && ((p - bytes) == (int)length);
5315 } else {
5316 // 4881221: relax the constraints based on JSR202 spec
5317 legal = verify_unqualified_name(bytes, length, LegalMethod);
5318 }
5319 }
5320
5321 if (!legal) {
5322 ResourceMark rm(THREAD);
5323 assert(_class_name != NULL, "invariant");
5324 Exceptions::fthrow(
5325 THREAD_AND_LOCATION,
5326 vmSymbols::java_lang_ClassFormatError(),
5327 "Illegal method name \"%s\" in class %s", bytes,
5328 _class_name->as_C_string()
5329 );
5330 return;
5331 }
5332 }
5333
5334
5335 // Checks if signature is a legal field signature.
5336 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5337 const Symbol* signature,
5338 TRAPS) const {
5339 if (!_need_verify) { return; }
5340
5341 char buf[fixed_buffer_size];
5342 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5343 const unsigned int length = signature->utf8_length();
5344 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5345
5346 if (p == NULL || (p - bytes) != (int)length) {
5347 throwIllegalSignature("Field", name, signature, CHECK);
5348 }
5349 }
5350
5351 // Checks if signature is a legal method signature.
5352 // Returns number of parameters
5353 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5354 const Symbol* signature,
5355 TRAPS) const {
5356 if (!_need_verify) {
5357 // make sure caller's args_size will be less than 0 even for non-static
5358 // method so it will be recomputed in compute_size_of_parameters().
5359 return -2;
5360 }
5361
5362 // Class initializers cannot have args for class format version >= 51.
5363 if (name == vmSymbols::class_initializer_name() &&
5364 signature != vmSymbols::void_method_signature() &&
5365 _major_version >= JAVA_7_VERSION) {
5366 throwIllegalSignature("Method", name, signature, CHECK_0);
5367 return 0;
5368 }
5369
5370 unsigned int args_size = 0;
5371 char buf[fixed_buffer_size];
5372 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5373 unsigned int length = signature->utf8_length();
5374 const char* nextp;
5375
5376 // The first character must be a '('
5377 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5378 length--;
5379 // Skip over legal field signatures
5380 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5381 while ((length > 0) && (nextp != NULL)) {
5382 args_size++;
5383 if (p[0] == 'J' || p[0] == 'D') {
5384 args_size++;
5385 }
5386 length -= nextp - p;
5387 p = nextp;
5388 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5389 }
5390 // The first non-signature thing better be a ')'
5391 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5392 length--;
5393 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5394 // All internal methods must return void
5395 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5396 return args_size;
5397 }
5398 } else {
5399 // Now we better just have a return value
5400 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5401 if (nextp && ((int)length == (nextp - p))) {
5402 return args_size;
5403 }
5404 }
5405 }
5406 }
5407 // Report error
5408 throwIllegalSignature("Method", name, signature, CHECK_0);
5409 return 0;
5410 }
5411
5412 int ClassFileParser::static_field_size() const {
5413 assert(_field_info != NULL, "invariant");
5414 return _field_info->static_field_size;
5415 }
5416
5417 int ClassFileParser::total_oop_map_count() const {
5418 assert(_field_info != NULL, "invariant");
5419 return _field_info->oop_map_blocks->nonstatic_oop_map_count;
5420 }
5421
5422 jint ClassFileParser::layout_size() const {
5423 assert(_field_info != NULL, "invariant");
5424 return _field_info->instance_size;
5425 }
5426
5427 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5428 const Array<Method*>* methods) {
5429 assert(ik != NULL, "invariant");
5430 assert(methods != NULL, "invariant");
5431
5432 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5433 // (We used to do this lazily, but now we query it in Rewriter,
5434 // which is eagerly done for every method, so we might as well do it now,
5435 // when everything is fresh in memory.)
5436 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5437
5438 if (klass_id != vmSymbols::NO_SID) {
5439 for (int j = 0; j < methods->length(); ++j) {
5440 Method* method = methods->at(j);
5441 method->init_intrinsic_id();
5442
5443 if (CheckIntrinsics) {
5444 // Check if an intrinsic is defined for method 'method',
5445 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5446 if (method->intrinsic_id() != vmIntrinsics::_none &&
5447 !method->intrinsic_candidate()) {
5448 tty->print("Compiler intrinsic is defined for method [%s], "
5449 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5450 method->name_and_sig_as_C_string(),
5451 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5452 );
5453 tty->cr();
5454 DEBUG_ONLY(vm_exit(1));
5455 }
5456 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5457 // but there is no intrinsic available for it.
5458 if (method->intrinsic_candidate() &&
5459 method->intrinsic_id() == vmIntrinsics::_none) {
5460 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5461 "but no compiler intrinsic is defined for the method.%s",
5462 method->name_and_sig_as_C_string(),
5463 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5464 );
5465 tty->cr();
5466 DEBUG_ONLY(vm_exit(1));
5467 }
5468 }
5469 } // end for
5470
5471 #ifdef ASSERT
5472 if (CheckIntrinsics) {
5473 // Check for orphan methods in the current class. A method m
5474 // of a class C is orphan if an intrinsic is defined for method m,
5475 // but class C does not declare m.
5476 // The check is potentially expensive, therefore it is available
5477 // only in debug builds.
5478
5479 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5480 if (vmIntrinsics::_compiledLambdaForm == id) {
5481 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5482 // generated for the JVM from a LambdaForm and therefore no method
5483 // is defined for it.
5484 continue;
5485 }
5486
5487 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5488 // Check if the current class contains a method with the same
5489 // name, flags, signature.
5490 bool match = false;
5491 for (int j = 0; j < methods->length(); ++j) {
5492 const Method* method = methods->at(j);
5493 if (method->intrinsic_id() == id) {
5494 match = true;
5495 break;
5496 }
5497 }
5498
5499 if (!match) {
5500 char buf[1000];
5501 tty->print("Compiler intrinsic is defined for method [%s], "
5502 "but the method is not available in class [%s].%s",
5503 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5504 buf, sizeof(buf)),
5505 ik->name()->as_C_string(),
5506 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5507 );
5508 tty->cr();
5509 DEBUG_ONLY(vm_exit(1));
5510 }
5511 }
5512 } // end for
5513 } // CheckIntrinsics
5514 #endif // ASSERT
5515 }
5516 }
5517
5518 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5519 if (_klass != NULL) {
5520 return _klass;
5521 }
5522
5523 InstanceKlass* const ik =
5524 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5525
5526 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5527
5528 assert(_klass == ik, "invariant");
5529
5530 ik->set_has_passed_fingerprint_check(false);
5531 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5532 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5533 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5534 // This class matches with a class saved in an AOT library
5535 ik->set_has_passed_fingerprint_check(true);
5536 } else {
5537 ResourceMark rm;
5538 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5539 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5540 }
5541 }
5542
5543 return ik;
5544 }
5545
5546 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5547 assert(ik != NULL, "invariant");
5548
5549 set_klass_to_deallocate(ik);
5550
5551 assert(_field_info != NULL, "invariant");
5552 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5553 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count,
5554 "sanity");
5555
5556 assert(ik->is_instance_klass(), "sanity");
5557 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5558
5559 // Fill in information already parsed
5560 ik->set_should_verify_class(_need_verify);
5561
5562 // Not yet: supers are done below to support the new subtype-checking fields
5563 ik->set_class_loader_data(_loader_data);
5564 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5565 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5566 assert(_fac != NULL, "invariant");
5567 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_VALUETYPE]);
5568
5569 // this transfers ownership of a lot of arrays from
5570 // the parser onto the InstanceKlass*
5571 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5572
5573 // note that is not safe to use the fields in the parser from this point on
5574 assert(NULL == _cp, "invariant");
5575 assert(NULL == _fields, "invariant");
5576 assert(NULL == _methods, "invariant");
5577 assert(NULL == _inner_classes, "invariant");
5578 assert(NULL == _local_interfaces, "invariant");
5579 assert(NULL == _transitive_interfaces, "invariant");
5580 assert(NULL == _combined_annotations, "invariant");
5581
5582 if (_has_final_method) {
5583 ik->set_has_final_method();
5584 }
5585
5586 ik->copy_method_ordering(_method_ordering, CHECK);
5587 // The InstanceKlass::_methods_jmethod_ids cache
5588 // is managed on the assumption that the initial cache
5589 // size is equal to the number of methods in the class. If
5590 // that changes, then InstanceKlass::idnum_can_increment()
5591 // has to be changed accordingly.
5592 ik->set_initial_method_idnum(ik->methods()->length());
5593
5594 ik->set_name(_class_name);
5595
5596 if (is_anonymous()) {
5597 // _this_class_index is a CONSTANT_Class entry that refers to this
5598 // anonymous class itself. If this class needs to refer to its own methods or
5599 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5600 // _this_class_index. However, because this class is anonymous (it's
5601 // not stored in SystemDictionary), _this_class_index cannot be resolved
5602 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5603 // Therefore, we must eagerly resolve _this_class_index now.
5604 ik->constants()->klass_at_put(_this_class_index, ik);
5605 }
5606
5607 ik->set_minor_version(_minor_version);
5608 ik->set_major_version(_major_version);
5609 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5610 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5611
5612 if (_host_klass != NULL) {
5613 assert (ik->is_anonymous(), "should be the same");
5614 ik->set_host_klass(_host_klass);
5615 }
5616
5617 // Set PackageEntry for this_klass
5618 oop cl = ik->class_loader();
5619 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5620 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5621 ik->set_package(cld, CHECK);
5622
5623 const Array<Method*>* const methods = ik->methods();
5624 assert(methods != NULL, "invariant");
5625 const int methods_len = methods->length();
5626
5627 check_methods_for_intrinsics(ik, methods);
5628
5629 // Fill in field values obtained by parse_classfile_attributes
5630 if (_parsed_annotations->has_any_annotations()) {
5631 _parsed_annotations->apply_to(ik);
5632 }
5633
5634 apply_parsed_class_attributes(ik);
5635
5636 // Miranda methods
5637 if ((_num_miranda_methods > 0) ||
5638 // if this class introduced new miranda methods or
5639 (_super_klass != NULL && _super_klass->has_miranda_methods())
5640 // super class exists and this class inherited miranda methods
5641 ) {
5642 ik->set_has_miranda_methods(); // then set a flag
5643 }
5644
5645 // Fill in information needed to compute superclasses.
5646 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5647
5648 // Initialize itable offset tables
5649 klassItable::setup_itable_offset_table(ik);
5650
5651 // Compute transitive closure of interfaces this class implements
5652 // Do final class setup
5653 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5654 if (oop_map_blocks->nonstatic_oop_map_count > 0) {
5655 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5656 }
5657
5658 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5659 set_precomputed_flags(ik);
5660
5661 // check if this class can access its super class
5662 check_super_class_access(ik, CHECK);
5663
5664 // check if this class can access its superinterfaces
5665 check_super_interface_access(ik, CHECK);
5666
5667 // check if this class overrides any final method
5668 check_final_method_override(ik, CHECK);
5669
5670 // reject static interface methods prior to Java 8
5671 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5672 check_illegal_static_method(ik, CHECK);
5673 }
5674
5675 // Obtain this_klass' module entry
5676 ModuleEntry* module_entry = ik->module();
5677 assert(module_entry != NULL, "module_entry should always be set");
5678
5679 // Obtain java.lang.Module
5680 Handle module_handle(THREAD, module_entry->module());
5681
5682 // Allocate mirror and initialize static fields
5683 // The create_mirror() call will also call compute_modifiers()
5684 java_lang_Class::create_mirror(ik,
5685 Handle(THREAD, _loader_data->class_loader()),
5686 module_handle,
5687 _protection_domain,
5688 CHECK);
5689
5690 assert(_all_mirandas != NULL, "invariant");
5691
5692 // Generate any default methods - default methods are public interface methods
5693 // that have a default implementation. This is new with Java 8.
5694 if (_has_nonstatic_concrete_methods) {
5695 DefaultMethods::generate_default_methods(ik,
5696 _all_mirandas,
5697 CHECK);
5698 }
5699
5700 if (is_value_type()) {
5701 ValueKlass* vk = ValueKlass::cast(ik);
5702 vk->set_if_bufferable();
5703 vk->initialize_calling_convention();
5704 }
5705
5706 // Valhalla shady value type conversion
5707 if (_parsed_annotations->is_value_capable_class()) {
5708 ik->create_value_capable_class(Handle(THREAD, _loader_data->class_loader()),
5709 _protection_domain, CHECK);
5710 }
5711
5712 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5713 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5714 !module_entry->has_default_read_edges()) {
5715 if (!module_entry->set_has_default_read_edges()) {
5716 // We won a potential race
5717 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5718 }
5719 }
5720
5721 // Update the loader_data graph.
5722 record_defined_class_dependencies(ik, CHECK);
5723
5724 for (FieldStream st((InstanceKlass*)ik, false, false); !st.eos(); st.next()) {
5725 Symbol* signature = st.signature();
5726 if (signature->starts_with("Q")) {
5727 Klass* klass = SystemDictionary::resolve_or_fail(signature,
5728 Handle(THREAD, ik->class_loader()),
5729 Handle(THREAD, ik->protection_domain()), true, CHECK);
5730 assert(klass != NULL, "Sanity check");
5731 assert(klass->access_flags().is_value_type(), "Value type expected");
5732 ik->set_value_field_klass(st.index(), klass);
5733 }
5734 }
5735
5736 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5737
5738 if (!is_internal()) {
5739 if (log_is_enabled(Info, class, load)) {
5740 ResourceMark rm;
5741 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5742 ik->print_class_load_logging(_loader_data, module_name, _stream);
5743 }
5744
5745 if (log_is_enabled(Debug, class, resolve)) {
5746 ResourceMark rm;
5747 // print out the superclass.
5748 const char * from = ik->external_name();
5749 if (ik->java_super() != NULL) {
5750 log_debug(class, resolve)("%s %s (super)",
5751 from,
5752 ik->java_super()->external_name());
5753 }
5754 // print out each of the interface classes referred to by this class.
5755 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5756 if (local_interfaces != NULL) {
5757 const int length = local_interfaces->length();
5758 for (int i = 0; i < length; i++) {
5759 const Klass* const k = local_interfaces->at(i);
5760 const char * to = k->external_name();
5761 log_debug(class, resolve)("%s %s (interface)", from, to);
5762 }
5763 }
5764 }
5765 }
5766
5767 TRACE_INIT_ID(ik);
5768
5769 // If we reach here, all is well.
5770 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5771 // in order for it to not be destroyed in the ClassFileParser destructor.
5772 set_klass_to_deallocate(NULL);
5773
5774 // it's official
5775 set_klass(ik);
5776
5777 debug_only(ik->verify();)
5778 }
5779
5780 // For an anonymous class that is in the unnamed package, move it to its host class's
5781 // package by prepending its host class's package name to its class name and setting
5782 // its _class_name field.
5783 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5784 ResourceMark rm(THREAD);
5785 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5786 "Anonymous class should not be in a package");
5787 const char* host_pkg_name =
5788 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5789
5790 if (host_pkg_name != NULL) {
5791 size_t host_pkg_len = strlen(host_pkg_name);
5792 int class_name_len = _class_name->utf8_length();
5793 char* new_anon_name =
5794 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5795 // Copy host package name and trailing /.
5796 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5797 new_anon_name[host_pkg_len] = '/';
5798 // Append anonymous class name. The anonymous class name can contain odd
5799 // characters. So, do a strncpy instead of using sprintf("%s...").
5800 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5801
5802 // Create a symbol and update the anonymous class name.
5803 _class_name = SymbolTable::new_symbol(new_anon_name,
5804 (int)host_pkg_len + 1 + class_name_len,
5805 CHECK);
5806 }
5807 }
5808
5809 // If the host class and the anonymous class are in the same package then do
5810 // nothing. If the anonymous class is in the unnamed package then move it to its
5811 // host's package. If the classes are in different packages then throw an IAE
5812 // exception.
5813 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5814 assert(_host_klass != NULL, "Expected an anonymous class");
5815
5816 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5817 _class_name->utf8_length(), '/');
5818 if (anon_last_slash == NULL) { // Unnamed package
5819 prepend_host_package_name(_host_klass, CHECK);
5820 } else {
5821 if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) {
5822 ResourceMark rm(THREAD);
5823 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5824 err_msg("Host class %s and anonymous class %s are in different packages",
5825 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5826 }
5827 }
5828 }
5829
5830 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5831 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5832 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5833 bool need_verify =
5834 // verifyAll
5835 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5836 // verifyRemote
5837 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5838 return !need_verify;
5839 }
5840
5841 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5842 Symbol* name,
5843 ClassLoaderData* loader_data,
5844 Handle protection_domain,
5845 const InstanceKlass* host_klass,
5846 GrowableArray<Handle>* cp_patches,
5847 Publicity pub_level,
5848 TRAPS) :
5849 _stream(stream),
5850 _requested_name(name),
5851 _loader_data(loader_data),
5852 _host_klass(host_klass),
5853 _cp_patches(cp_patches),
5854 _num_patched_klasses(0),
5855 _max_num_patched_klasses(0),
5856 _orig_cp_size(0),
5857 _first_patched_klass_resolved_index(0),
5858 _super_klass(),
5859 _cp(NULL),
5860 _fields(NULL),
5861 _methods(NULL),
5862 _inner_classes(NULL),
5863 _local_interfaces(NULL),
5864 _transitive_interfaces(NULL),
5865 _combined_annotations(NULL),
5866 _annotations(NULL),
5867 _type_annotations(NULL),
5868 _fields_annotations(NULL),
5869 _fields_type_annotations(NULL),
5870 _klass(NULL),
5871 _klass_to_deallocate(NULL),
5872 _parsed_annotations(NULL),
5873 _fac(NULL),
5874 _field_info(NULL),
5875 _method_ordering(NULL),
5876 _all_mirandas(NULL),
5877 _vtable_size(0),
5878 _itable_size(0),
5879 _num_miranda_methods(0),
5880 _rt(REF_NONE),
5881 _protection_domain(protection_domain),
5882 _access_flags(),
5883 _pub_level(pub_level),
5884 _bad_constant_seen(0),
5885 _synthetic_flag(false),
5886 _sde_length(false),
5887 _sde_buffer(NULL),
5888 _sourcefile_index(0),
5889 _generic_signature_index(0),
5890 _major_version(0),
5891 _minor_version(0),
5892 _this_class_index(0),
5893 _super_class_index(0),
5894 _itfs_len(0),
5895 _java_fields_count(0),
5896 _need_verify(false),
5897 _relax_verify(false),
5898 _has_nonstatic_concrete_methods(false),
5899 _declares_nonstatic_concrete_methods(false),
5900 _has_final_method(false),
5901 _has_finalizer(false),
5902 _has_empty_finalizer(false),
5903 _has_vanilla_constructor(false),
5904 _max_bootstrap_specifier_index(-1),
5905 _has_value_fields(false) {
5906
5907 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5908
5909 assert(THREAD->is_Java_thread(), "invariant");
5910 assert(_loader_data != NULL, "invariant");
5911 assert(stream != NULL, "invariant");
5912 assert(_stream != NULL, "invariant");
5913 assert(_stream->buffer() == _stream->current(), "invariant");
5914 assert(_class_name != NULL, "invariant");
5915 assert(0 == _access_flags.as_int(), "invariant");
5916
5917 // Figure out whether we can skip format checking (matching classic VM behavior)
5918 if (DumpSharedSpaces) {
5919 // verify == true means it's a 'remote' class (i.e., non-boot class)
5920 // Verification decision is based on BytecodeVerificationRemote flag
5921 // for those classes.
5922 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5923 BytecodeVerificationLocal;
5924 }
5925 else {
5926 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5927 stream->need_verify());
5928 }
5929 if (_cp_patches != NULL) {
5930 int len = _cp_patches->length();
5931 for (int i=0; i<len; i++) {
5932 if (has_cp_patch_at(i)) {
5933 Handle patch = cp_patch_at(i);
5934 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5935 // We need to append the names of the patched classes to the end of the constant pool,
5936 // because a patched class may have a Utf8 name that's not already included in the
5937 // original constant pool. These class names are used when patch_constant_pool()
5938 // calls patch_class().
5939 //
5940 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5941 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5942 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5943 _max_num_patched_klasses++;
5944 }
5945 }
5946 }
5947 }
5948
5949 // synch back verification state to stream
5950 stream->set_verify(_need_verify);
5951
5952 // Check if verification needs to be relaxed for this class file
5953 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5954 _relax_verify = relax_format_check_for(_loader_data);
5955
5956 parse_stream(stream, CHECK);
5957
5958 post_process_parsed_stream(stream, _cp, CHECK);
5959 }
5960
5961 void ClassFileParser::clear_class_metadata() {
5962 // metadata created before the instance klass is created. Must be
5963 // deallocated if classfile parsing returns an error.
5964 _cp = NULL;
5965 _fields = NULL;
5966 _methods = NULL;
5967 _inner_classes = NULL;
5968 _local_interfaces = NULL;
5969 _transitive_interfaces = NULL;
5970 _combined_annotations = NULL;
5971 _annotations = _type_annotations = NULL;
5972 _fields_annotations = _fields_type_annotations = NULL;
5973 }
5974
5975 // Destructor to clean up
5976 ClassFileParser::~ClassFileParser() {
5977 if (_cp != NULL) {
5978 MetadataFactory::free_metadata(_loader_data, _cp);
5979 }
5980 if (_fields != NULL) {
5981 MetadataFactory::free_array<u2>(_loader_data, _fields);
5982 }
5983
5984 if (_methods != NULL) {
5985 // Free methods
5986 InstanceKlass::deallocate_methods(_loader_data, _methods);
5987 }
5988
5989 // beware of the Universe::empty_blah_array!!
5990 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5991 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5992 }
5993
5994 // Free interfaces
5995 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5996 _local_interfaces, _transitive_interfaces);
5997
5998 if (_combined_annotations != NULL) {
5999 // After all annotations arrays have been created, they are installed into the
6000 // Annotations object that will be assigned to the InstanceKlass being created.
6001
6002 // Deallocate the Annotations object and the installed annotations arrays.
6003 _combined_annotations->deallocate_contents(_loader_data);
6004
6005 // If the _combined_annotations pointer is non-NULL,
6006 // then the other annotations fields should have been cleared.
6007 assert(_annotations == NULL, "Should have been cleared");
6008 assert(_type_annotations == NULL, "Should have been cleared");
6009 assert(_fields_annotations == NULL, "Should have been cleared");
6010 assert(_fields_type_annotations == NULL, "Should have been cleared");
6011 } else {
6012 // If the annotations arrays were not installed into the Annotations object,
6013 // then they have to be deallocated explicitly.
6014 MetadataFactory::free_array<u1>(_loader_data, _annotations);
6015 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6016 Annotations::free_contents(_loader_data, _fields_annotations);
6017 Annotations::free_contents(_loader_data, _fields_type_annotations);
6018 }
6019
6020 clear_class_metadata();
6021
6022 // deallocate the klass if already created. Don't directly deallocate, but add
6023 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6024 // at a safepoint.
6025 if (_klass_to_deallocate != NULL) {
6026 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6027 }
6028 }
6029
6030 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6031 TRAPS) {
6032
6033 assert(stream != NULL, "invariant");
6034 assert(_class_name != NULL, "invariant");
6035
6036 // BEGIN STREAM PARSING
6037 stream->guarantee_more(8, CHECK); // magic, major, minor
6038 // Magic value
6039 const u4 magic = stream->get_u4_fast();
6040 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6041 "Incompatible magic value %u in class file %s",
6042 magic, CHECK);
6043
6044 // Version numbers
6045 _minor_version = stream->get_u2_fast();
6046 _major_version = stream->get_u2_fast();
6047
6048 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6049 ResourceMark rm;
6050 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6051 _major_version, _minor_version, _class_name->as_C_string());
6052 Exceptions::fthrow(
6053 THREAD_AND_LOCATION,
6054 vmSymbols::java_lang_UnsupportedClassVersionError(),
6055 "Unsupported major.minor version for dump time %u.%u",
6056 _major_version,
6057 _minor_version);
6058 }
6059
6060 // Check version numbers - we check this even with verifier off
6061 if (!is_supported_version(_major_version, _minor_version)) {
6062 ResourceMark rm(THREAD);
6063 Exceptions::fthrow(
6064 THREAD_AND_LOCATION,
6065 vmSymbols::java_lang_UnsupportedClassVersionError(),
6066 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
6067 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
6068 _class_name->as_C_string(),
6069 _major_version,
6070 _minor_version,
6071 JAVA_MAX_SUPPORTED_VERSION,
6072 JAVA_MAX_SUPPORTED_MINOR_VERSION);
6073 return;
6074 }
6075
6076 stream->guarantee_more(3, CHECK); // length, first cp tag
6077 u2 cp_size = stream->get_u2_fast();
6078
6079 guarantee_property(
6080 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6081 cp_size, CHECK);
6082
6083 _orig_cp_size = cp_size;
6084 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6085 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6086 }
6087 cp_size += _max_num_patched_klasses;
6088
6089 _cp = ConstantPool::allocate(_loader_data,
6090 cp_size,
6091 CHECK);
6092
6093 ConstantPool* const cp = _cp;
6094
6095 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6096
6097 assert(cp_size == (const u2)cp->length(), "invariant");
6098
6099 // ACCESS FLAGS
6100 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6101
6102 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6103 // JVM_ACC_MODULE is defined in JDK-9 and later.
6104 if (_major_version >= JAVA_9_VERSION) {
6105 recognized_modifiers |= JVM_ACC_MODULE;
6106 }
6107 // JVM_ACC_VALUE is defined for class file version 53.1 and later
6108 if (supports_value_types()) {
6109 recognized_modifiers |= JVM_ACC_VALUE;
6110 }
6111
6112 // Access flags
6113 jint flags = stream->get_u2_fast() & recognized_modifiers;
6114
6115 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6116 // Set abstract bit for old class files for backward compatibility
6117 flags |= JVM_ACC_ABSTRACT;
6118 }
6119
6120 verify_legal_class_modifiers(flags, CHECK);
6121
6122 short bad_constant = class_bad_constant_seen();
6123 if (bad_constant != 0) {
6124 // Do not throw CFE until after the access_flags are checked because if
6125 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6126 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6127 }
6128
6129 _access_flags.set_flags(flags);
6130
6131 // This class and superclass
6132 _this_class_index = stream->get_u2_fast();
6133 check_property(
6134 (valid_cp_range(_this_class_index, cp_size) &&
6135 (cp->tag_at(_this_class_index).is_unresolved_klass() ||
6136 cp->tag_at(_this_class_index).is_unresolved_value_type())),
6137 "Invalid this class index %u in constant pool in class file %s",
6138 _this_class_index, CHECK);
6139
6140 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6141 assert(class_name_in_cp != NULL, "class_name can't be null");
6142
6143 // Update _class_name which could be null previously
6144 // to reflect the name in the constant pool
6145 _class_name = class_name_in_cp;
6146
6147 // Don't need to check whether this class name is legal or not.
6148 // It has been checked when constant pool is parsed.
6149 // However, make sure it is not an array type.
6150 if (_need_verify) {
6151 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
6152 "Bad class name in class file %s",
6153 CHECK);
6154 }
6155
6156 // Checks if name in class file matches requested name
6157 if (_requested_name != NULL && _requested_name != _class_name) {
6158 ResourceMark rm(THREAD);
6159 Exceptions::fthrow(
6160 THREAD_AND_LOCATION,
6161 vmSymbols::java_lang_NoClassDefFoundError(),
6162 "%s (wrong name: %s)",
6163 _class_name->as_C_string(),
6164 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6165 );
6166 return;
6167 }
6168
6169 // if this is an anonymous class fix up its name if it's in the unnamed
6170 // package. Otherwise, throw IAE if it is in a different package than
6171 // its host class.
6172 if (_host_klass != NULL) {
6173 fix_anonymous_class_name(CHECK);
6174 }
6175
6176 // Verification prevents us from creating names with dots in them, this
6177 // asserts that that's the case.
6178 assert(is_internal_format(_class_name), "external class name format used internally");
6179
6180 if (!is_internal()) {
6181 LogTarget(Debug, class, preorder) lt;
6182 if (lt.is_enabled()){
6183 ResourceMark rm(THREAD);
6184 LogStream ls(lt);
6185 ls.print("%s", _class_name->as_klass_external_name());
6186 if (stream->source() != NULL) {
6187 ls.print(" source: %s", stream->source());
6188 }
6189 ls.cr();
6190 }
6191
6192 #if INCLUDE_CDS
6193 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6194 // Only dump the classes that can be stored into CDS archive.
6195 // Anonymous classes such as generated LambdaForm classes are also not included.
6196 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6197 _host_klass == NULL) {
6198 oop class_loader = _loader_data->class_loader();
6199 ResourceMark rm(THREAD);
6200 // For the boot and platform class loaders, check if the class is not found in the
6201 // java runtime image. Additional check for the boot class loader is if the class
6202 // is not found in the boot loader's appended entries. This indicates that the class
6203 // is not useable during run time, such as the ones found in the --patch-module entries,
6204 // so it should not be included in the classlist file.
6205 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
6206 SystemDictionary::is_platform_class_loader(class_loader)) &&
6207 !ClassLoader::is_jrt(stream->source())) {
6208 tty->print_cr("skip writing class %s from source %s to classlist file",
6209 _class_name->as_C_string(), stream->source());
6210 } else {
6211 classlist_file->print_cr("%s", _class_name->as_C_string());
6212 classlist_file->flush();
6213 }
6214 }
6215 }
6216 #endif
6217 }
6218
6219 // SUPERKLASS
6220 _super_class_index = stream->get_u2_fast();
6221 _super_klass = parse_super_class(cp,
6222 _super_class_index,
6223 _need_verify,
6224 CHECK);
6225
6226 // Interfaces
6227 _itfs_len = stream->get_u2_fast();
6228 parse_interfaces(stream,
6229 _itfs_len,
6230 cp,
6231 &_has_nonstatic_concrete_methods,
6232 CHECK);
6233
6234 assert(_local_interfaces != NULL, "invariant");
6235
6236 // Fields (offsets are filled in later)
6237 _fac = new FieldAllocationCount();
6238 parse_fields(stream,
6239 _access_flags.is_interface(),
6240 _fac,
6241 cp,
6242 cp_size,
6243 &_java_fields_count,
6244 CHECK);
6245
6246 assert(_fields != NULL, "invariant");
6247
6248 // Methods
6249 AccessFlags promoted_flags;
6250 parse_methods(stream,
6251 _access_flags.is_interface(),
6252 &promoted_flags,
6253 &_has_final_method,
6254 &_declares_nonstatic_concrete_methods,
6255 CHECK);
6256
6257 assert(_methods != NULL, "invariant");
6258
6259 // promote flags from parse_methods() to the klass' flags
6260 _access_flags.add_promoted_flags(promoted_flags.as_int());
6261
6262 if (_declares_nonstatic_concrete_methods) {
6263 _has_nonstatic_concrete_methods = true;
6264 }
6265
6266 // Additional attributes/annotations
6267 _parsed_annotations = new ClassAnnotationCollector();
6268 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6269
6270 assert(_inner_classes != NULL, "invariant");
6271
6272 // Finalize the Annotations metadata object,
6273 // now that all annotation arrays have been created.
6274 create_combined_annotations(CHECK);
6275
6276 // Make sure this is the end of class file stream
6277 guarantee_property(stream->at_eos(),
6278 "Extra bytes at the end of class file %s",
6279 CHECK);
6280
6281 // all bytes in stream read and parsed
6282 }
6283
6284 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6285 ConstantPool* cp,
6286 TRAPS) {
6287 assert(stream != NULL, "invariant");
6288 assert(stream->at_eos(), "invariant");
6289 assert(cp != NULL, "invariant");
6290 assert(_loader_data != NULL, "invariant");
6291
6292 if (_class_name == vmSymbols::java_lang_Object()) {
6293 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6294 "java.lang.Object cannot implement an interface in class file %s",
6295 CHECK);
6296 }
6297 // We check super class after class file is parsed and format is checked
6298 if (_super_class_index > 0 && NULL ==_super_klass) {
6299 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6300 if (_access_flags.is_interface()) {
6301 // Before attempting to resolve the superclass, check for class format
6302 // errors not checked yet.
6303 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6304 "Interfaces must have java.lang.Object as superclass in class file %s",
6305 CHECK);
6306 }
6307 Handle loader(THREAD, _loader_data->class_loader());
6308 _super_klass = (const InstanceKlass*)
6309 SystemDictionary::resolve_super_or_fail(_class_name,
6310 super_class_name,
6311 loader,
6312 _protection_domain,
6313 true,
6314 CHECK);
6315 }
6316
6317 if (_super_klass != NULL) {
6318 if (_super_klass->has_nonstatic_concrete_methods()) {
6319 _has_nonstatic_concrete_methods = true;
6320 }
6321
6322 if (_super_klass->is_interface()) {
6323 ResourceMark rm(THREAD);
6324 Exceptions::fthrow(
6325 THREAD_AND_LOCATION,
6326 vmSymbols::java_lang_IncompatibleClassChangeError(),
6327 "class %s has interface %s as super class",
6328 _class_name->as_klass_external_name(),
6329 _super_klass->external_name()
6330 );
6331 return;
6332 }
6333
6334 // For a java/lang/__Value super class, the class inheriting, must be a value class
6335 if ((EnableValhalla || EnableMVT) &&
6336 _super_klass->name() == vmSymbols::java_lang____Value()) {
6337 guarantee_property((_access_flags.get_flags() & JVM_ACC_VALUE) != 0,
6338 "Only a value class can inherit from java/lang/__Value",
6339 CHECK);
6340 }
6341
6342 // For a value class, only java/lang/__Value is an acceptable super class
6343 if ((EnableValhalla || EnableMVT) &&
6344 _access_flags.get_flags() & JVM_ACC_VALUE) {
6345 guarantee_property(_super_klass->name() == vmSymbols::java_lang____Value(),
6346 "Value class can only inherit java/lang/__Value",
6347 CHECK);
6348 }
6349
6350 // Make sure super class is not final
6351 if (_super_klass->is_final()
6352 && !(_super_klass->name() == vmSymbols::java_lang____Value()
6353 && (_access_flags.get_flags() & JVM_ACC_VALUE))) {
6354 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6355 }
6356 }
6357
6358 // Compute the transitive list of all unique interfaces implemented by this class
6359 _transitive_interfaces =
6360 compute_transitive_interfaces(_super_klass,
6361 _local_interfaces,
6362 _loader_data,
6363 CHECK);
6364
6365 assert(_transitive_interfaces != NULL, "invariant");
6366
6367 // sort methods
6368 _method_ordering = sort_methods(_methods);
6369
6370 _all_mirandas = new GrowableArray<Method*>(20);
6371
6372 Handle loader(THREAD, _loader_data->class_loader());
6373 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6374 &_num_miranda_methods,
6375 _all_mirandas,
6376 _super_klass,
6377 _methods,
6378 _access_flags,
6379 _major_version,
6380 loader,
6381 _class_name,
6382 _local_interfaces,
6383 CHECK);
6384
6385 // Size of Java itable (in words)
6386 _itable_size = _access_flags.is_interface() ? 0 :
6387 klassItable::compute_itable_size(_transitive_interfaces);
6388
6389 assert(_fac != NULL, "invariant");
6390 assert(_parsed_annotations != NULL, "invariant");
6391
6392 _field_info = new FieldLayoutInfo();
6393 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6394
6395 // Compute reference typ
6396 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6397
6398 }
6399
6400 void ClassFileParser::set_klass(InstanceKlass* klass) {
6401
6402 #ifdef ASSERT
6403 if (klass != NULL) {
6404 assert(NULL == _klass, "leaking?");
6405 }
6406 #endif
6407
6408 _klass = klass;
6409 }
6410
6411 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6412
6413 #ifdef ASSERT
6414 if (klass != NULL) {
6415 assert(NULL == _klass_to_deallocate, "leaking?");
6416 }
6417 #endif
6418
6419 _klass_to_deallocate = klass;
6420 }
6421
6422 // Caller responsible for ResourceMark
6423 // clone stream with rewound position
6424 const ClassFileStream* ClassFileParser::clone_stream() const {
6425 assert(_stream != NULL, "invariant");
6426
6427 return _stream->clone();
6428 }
6429
6430 bool ClassFileParser::is_value_capable_class() const {
6431 return _parsed_annotations->is_value_capable_class();
6432 }
6433
6434 // ----------------------------------------------------------------------------
6435 // debugging
6436
6437 #ifdef ASSERT
6438
6439 // return true if class_name contains no '.' (internal format is '/')
6440 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6441 if (class_name != NULL) {
6442 ResourceMark rm;
6443 char* name = class_name->as_C_string();
6444 return strchr(name, '.') == NULL;
6445 } else {
6446 return true;
6447 }
6448 }
6449
6450 #endif