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 (valid_value_type_reference_at(klass_ref_index) &&
426 ((EnableMVT && (tag == JVM_CONSTANT_Fieldref)) ||
427 EnableValhalla)),
428 "Invalid constant pool index %u in class file %s",
429 klass_ref_index, CHECK);
430 check_property(valid_cp_range(name_and_type_ref_index, length) &&
431 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
432 "Invalid constant pool index %u in class file %s",
433 name_and_type_ref_index, CHECK);
434 break;
435 }
436 case JVM_CONSTANT_String: {
437 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
438 break;
439 }
440 case JVM_CONSTANT_Integer:
441 break;
442 case JVM_CONSTANT_Float:
443 break;
444 case JVM_CONSTANT_Long:
445 case JVM_CONSTANT_Double: {
446 index++;
447 check_property(
448 (index < length && cp->tag_at(index).is_invalid()),
449 "Improper constant pool long/double index %u in class file %s",
450 index, CHECK);
451 break;
452 }
453 case JVM_CONSTANT_NameAndType: {
454 if (!_need_verify) break;
455 const int name_ref_index = cp->name_ref_index_at(index);
456 const int signature_ref_index = cp->signature_ref_index_at(index);
457 check_property(valid_symbol_at(name_ref_index),
458 "Invalid constant pool index %u in class file %s",
459 name_ref_index, CHECK);
460 check_property(valid_symbol_at(signature_ref_index),
461 "Invalid constant pool index %u in class file %s",
462 signature_ref_index, CHECK);
463 break;
464 }
465 case JVM_CONSTANT_Utf8:
466 break;
467 case JVM_CONSTANT_UnresolvedClass: // fall-through
468 case JVM_CONSTANT_UnresolvedClassInError: {
469 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
470 break;
471 }
472 case JVM_CONSTANT_ClassIndex: {
473 const int class_index = cp->klass_index_at(index);
474 check_property(valid_symbol_at(class_index),
475 "Invalid constant pool index %u in class file %s",
476 class_index, CHECK);
477
478 Symbol* const name = cp->symbol_at(class_index);
479 const unsigned int name_len = name->utf8_length();
480
481 // check explicitly for ;Qjava/lang/__Value;
482 if (name_len == 20 &&
483 name->equals(";Qjava/lang/__Value;")) {
484 cp->symbol_at_put(class_index, vmSymbols::java_lang____Value());
485 cp->unresolved_value_type_at_put(index, class_index, num_klasses++);
486 } else if (EnableValhalla || EnableMVT) {
487 const char* derive_vt_classname_postfix = "$Value;";
488 // check for a value type
489 // check for name > 3 to rule out ";Q;" where no name is present
490 if (name_len != 0 &&
491 name_len > 3 &&
492 name->starts_with(";Q") &&
493 ((EnableValhalla && (name->byte_at(name_len-1) == ';')) ||
494 (EnableMVT && ClassLoader::string_ends_with(name->as_utf8(), derive_vt_classname_postfix)))) {
495 Symbol* const strippedsym = SymbolTable::new_symbol(name, 2, name_len-1, CHECK);
496 assert(strippedsym != NULL, "failure to create value type stripped name");
497 cp->symbol_at_put(class_index, strippedsym);
498 cp->unresolved_value_type_at_put(index, class_index, num_klasses++);
499 } else {
500 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
501 }
502 } else {
503 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
504 }
505 break;
506 }
507 case JVM_CONSTANT_ValueIndex: {
508 const int class_index = cp->value_type_index_at(index);
509 check_property(valid_symbol_at(class_index),
510 "Invalid constant pool index %u in class file %s",
511 class_index, CHECK);
512 cp->unresolved_value_type_at_put(index, class_index, num_klasses++);
513 break;
514 }
515 case JVM_CONSTANT_StringIndex: {
516 const int string_index = cp->string_index_at(index);
517 check_property(valid_symbol_at(string_index),
518 "Invalid constant pool index %u in class file %s",
519 string_index, CHECK);
520 Symbol* const sym = cp->symbol_at(string_index);
521 cp->unresolved_string_at_put(index, sym);
522 break;
523 }
524 case JVM_CONSTANT_MethodHandle: {
525 const int ref_index = cp->method_handle_index_at(index);
526 check_property(valid_cp_range(ref_index, length),
527 "Invalid constant pool index %u in class file %s",
528 ref_index, CHECK);
529 const constantTag tag = cp->tag_at(ref_index);
530 const int ref_kind = cp->method_handle_ref_kind_at(index);
531
532 switch (ref_kind) {
533 case JVM_REF_getField:
534 case JVM_REF_getStatic:
535 case JVM_REF_putField:
536 case JVM_REF_putStatic: {
537 check_property(
538 tag.is_field(),
539 "Invalid constant pool index %u in class file %s (not a field)",
540 ref_index, CHECK);
541 break;
542 }
543 case JVM_REF_invokeVirtual:
544 case JVM_REF_newInvokeSpecial: {
545 check_property(
546 tag.is_method(),
547 "Invalid constant pool index %u in class file %s (not a method)",
548 ref_index, CHECK);
549 break;
550 }
551 case JVM_REF_invokeStatic:
552 case JVM_REF_invokeSpecial: {
553 check_property(
554 tag.is_method() ||
555 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
556 "Invalid constant pool index %u in class file %s (not a method)",
557 ref_index, CHECK);
558 break;
559 }
560 case JVM_REF_invokeInterface: {
561 check_property(
562 tag.is_interface_method(),
563 "Invalid constant pool index %u in class file %s (not an interface method)",
564 ref_index, CHECK);
565 break;
566 }
567 default: {
568 classfile_parse_error(
569 "Bad method handle kind at constant pool index %u in class file %s",
570 index, CHECK);
571 }
572 } // switch(refkind)
573 // Keep the ref_index unchanged. It will be indirected at link-time.
574 break;
575 } // case MethodHandle
576 case JVM_CONSTANT_MethodType: {
577 const int ref_index = cp->method_type_index_at(index);
578 check_property(valid_symbol_at(ref_index),
579 "Invalid constant pool index %u in class file %s",
580 ref_index, CHECK);
581 break;
582 }
583 case JVM_CONSTANT_InvokeDynamic: {
584 const int name_and_type_ref_index =
585 cp->invoke_dynamic_name_and_type_ref_index_at(index);
586
587 check_property(valid_cp_range(name_and_type_ref_index, length) &&
588 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
589 "Invalid constant pool index %u in class file %s",
590 name_and_type_ref_index, CHECK);
591 // bootstrap specifier index must be checked later,
592 // when BootstrapMethods attr is available
593 break;
594 }
595 default: {
596 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
597 ShouldNotReachHere();
598 break;
599 }
600 } // switch(tag)
601 } // end of for
602
603 _first_patched_klass_resolved_index = num_klasses;
604 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
605
606 if (_cp_patches != NULL) {
607 // need to treat this_class specially...
608
609 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
610 // for now. These will be replaced with actual names of the patched classes in patch_class().
611 Symbol* s = vmSymbols::star_name();
612 for (int n=_orig_cp_size; n<cp->length(); n++) {
613 cp->symbol_at_put(n, s);
614 }
615
616 int this_class_index;
617 {
618 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
619 const u1* const mark = stream->current();
620 stream->skip_u2_fast(1); // skip flags
621 this_class_index = stream->get_u2_fast();
622 stream->set_current(mark); // revert to mark
623 }
624
625 for (index = 1; index < length; index++) { // Index 0 is unused
626 if (has_cp_patch_at(index)) {
627 guarantee_property(index != this_class_index,
628 "Illegal constant pool patch to self at %d in class file %s",
629 index, CHECK);
630 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
631 }
632 }
633 }
634
635 if (!_need_verify) {
636 return;
637 }
638
639 // second verification pass - checks the strings are of the right format.
640 // but not yet to the other entries
641 for (index = 1; index < length; index++) {
642 const jbyte tag = cp->tag_at(index).value();
643 switch (tag) {
644 case JVM_CONSTANT_UnresolvedClass:
645 case JVM_CONSTANT_UnresolvedValue: {
646 const Symbol* const class_name = cp->klass_name_at(index);
647 // check the name, even if _cp_patches will overwrite it
648 verify_legal_class_name(class_name, CHECK);
649 break;
650 }
651 case JVM_CONSTANT_NameAndType: {
652 if (_need_verify) {
653 const int sig_index = cp->signature_ref_index_at(index);
654 const int name_index = cp->name_ref_index_at(index);
655 const Symbol* const name = cp->symbol_at(name_index);
656 const Symbol* const sig = cp->symbol_at(sig_index);
657 guarantee_property(sig->utf8_length() != 0,
658 "Illegal zero length constant pool entry at %d in class %s",
659 sig_index, CHECK);
660 guarantee_property(name->utf8_length() != 0,
661 "Illegal zero length constant pool entry at %d in class %s",
662 name_index, CHECK);
663
664 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
665 // Format check method name and signature
666 verify_legal_method_name(name, CHECK);
667 verify_legal_method_signature(name, sig, CHECK);
668 } else {
669 // Format check field name and signature
670 verify_legal_field_name(name, CHECK);
671 verify_legal_field_signature(name, sig, CHECK);
672 }
673 }
674 break;
675 }
676 case JVM_CONSTANT_InvokeDynamic:
677 case JVM_CONSTANT_Fieldref:
678 case JVM_CONSTANT_Methodref:
679 case JVM_CONSTANT_InterfaceMethodref: {
680 const int name_and_type_ref_index =
681 cp->name_and_type_ref_index_at(index);
682 // already verified to be utf8
683 const int name_ref_index =
684 cp->name_ref_index_at(name_and_type_ref_index);
685 // already verified to be utf8
686 const int signature_ref_index =
687 cp->signature_ref_index_at(name_and_type_ref_index);
688 const Symbol* const name = cp->symbol_at(name_ref_index);
689 const Symbol* const signature = cp->symbol_at(signature_ref_index);
690 if (tag == JVM_CONSTANT_Fieldref) {
691 if (_need_verify) {
692 // Field name and signature are verified above, when iterating NameAndType_info.
693 // Need only to be sure signature is non-zero length and the right type.
694 if (signature->utf8_length() == 0 ||
695 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
696 throwIllegalSignature("Field", name, signature, CHECK);
697 }
698 }
699 } else {
700 if (_need_verify) {
701 // Method name and signature are verified above, when iterating NameAndType_info.
702 // Need only to be sure signature is non-zero length and the right type.
703 if (signature->utf8_length() == 0 ||
704 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
705 throwIllegalSignature("Method", name, signature, CHECK);
706 }
707 }
708 // 4509014: If a class method name begins with '<', it must be "<init>"
709 const unsigned int name_len = name->utf8_length();
710 if (tag == JVM_CONSTANT_Methodref &&
711 name_len != 0 &&
712 name->byte_at(0) == '<' &&
713 name != vmSymbols::object_initializer_name()) {
714 classfile_parse_error(
715 "Bad method name at constant pool index %u in class file %s",
716 name_ref_index, CHECK);
717 }
718 }
719 break;
720 }
721 case JVM_CONSTANT_MethodHandle: {
722 const int ref_index = cp->method_handle_index_at(index);
723 const int ref_kind = cp->method_handle_ref_kind_at(index);
724 switch (ref_kind) {
725 case JVM_REF_invokeVirtual:
726 case JVM_REF_invokeStatic:
727 case JVM_REF_invokeSpecial:
728 case JVM_REF_newInvokeSpecial: {
729 const int name_and_type_ref_index =
730 cp->name_and_type_ref_index_at(ref_index);
731 const int name_ref_index =
732 cp->name_ref_index_at(name_and_type_ref_index);
733 const Symbol* const name = cp->symbol_at(name_ref_index);
734 if (ref_kind == JVM_REF_newInvokeSpecial) {
735 if (name != vmSymbols::object_initializer_name()) {
736 classfile_parse_error(
737 "Bad constructor name at constant pool index %u in class file %s",
738 name_ref_index, CHECK);
739 }
740 } else {
741 if (name == vmSymbols::object_initializer_name()) {
742 classfile_parse_error(
743 "Bad method name at constant pool index %u in class file %s",
744 name_ref_index, CHECK);
745 }
746 }
747 break;
748 }
749 // Other ref_kinds are already fully checked in previous pass.
750 } // switch(ref_kind)
751 break;
752 }
753 case JVM_CONSTANT_MethodType: {
754 const Symbol* const no_name = vmSymbols::type_name(); // place holder
755 const Symbol* const signature = cp->method_type_signature_at(index);
756 verify_legal_method_signature(no_name, signature, CHECK);
757 break;
758 }
759 case JVM_CONSTANT_Utf8: {
760 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
761 }
762 } // switch(tag)
763 } // end of for
764 }
765
766 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
767 int name_index = _orig_cp_size + _num_patched_klasses;
768 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
769
770 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
771 _num_patched_klasses ++;
772 }
773
774 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
775 int index,
776 Handle patch,
777 TRAPS) {
778 assert(cp != NULL, "invariant");
779
780 BasicType patch_type = T_VOID;
781
782 switch (cp->tag_at(index).value()) {
783
784 case JVM_CONSTANT_UnresolvedClass: {
785 // Patching a class means pre-resolving it.
786 // The name in the constant pool is ignored.
787 if (java_lang_Class::is_instance(patch())) {
788 guarantee_property(!java_lang_Class::is_primitive(patch()),
789 "Illegal class patch at %d in class file %s",
790 index, CHECK);
791 Klass* k = java_lang_Class::as_Klass(patch());
792 patch_class(cp, index, k, k->name());
793 } else {
794 guarantee_property(java_lang_String::is_instance(patch()),
795 "Illegal class patch at %d in class file %s",
796 index, CHECK);
797 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
798 patch_class(cp, index, NULL, name);
799 }
800 break;
801 }
802
803 case JVM_CONSTANT_String: {
804 // skip this patch and don't clear it. Needs the oop array for resolved
805 // references to be created first.
806 return;
807 }
808 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
809 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
810 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
811 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
812 patch_prim:
813 {
814 jvalue value;
815 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
816 guarantee_property(value_type == patch_type,
817 "Illegal primitive patch at %d in class file %s",
818 index, CHECK);
819 switch (value_type) {
820 case T_INT: cp->int_at_put(index, value.i); break;
821 case T_FLOAT: cp->float_at_put(index, value.f); break;
822 case T_LONG: cp->long_at_put(index, value.j); break;
823 case T_DOUBLE: cp->double_at_put(index, value.d); break;
824 default: assert(false, "");
825 }
826 } // end patch_prim label
827 break;
828
829 default: {
830 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
831 guarantee_property(!has_cp_patch_at(index),
832 "Illegal unexpected patch at %d in class file %s",
833 index, CHECK);
834 return;
835 }
836 } // end of switch(tag)
837
838 // On fall-through, mark the patch as used.
839 clear_cp_patch_at(index);
840 }
841 class NameSigHash: public ResourceObj {
842 public:
843 const Symbol* _name; // name
844 const Symbol* _sig; // signature
845 NameSigHash* _next; // Next entry in hash table
846 };
847
848 static const int HASH_ROW_SIZE = 256;
849
850 static unsigned int hash(const Symbol* name, const Symbol* sig) {
851 unsigned int raw_hash = 0;
852 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
853 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
854
855 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
856 }
857
858
859 static void initialize_hashtable(NameSigHash** table) {
860 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
861 }
862 // Return false if the name/sig combination is found in table.
863 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
864 // The old format checker uses heap sort to find duplicates.
865 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
866 // of table since we don't expect Symbol*'s to move.
867 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
868 assert(name != NULL, "name in constant pool is NULL");
869
870 // First lookup for duplicates
871 int index = hash(name, sig);
872 NameSigHash* entry = table[index];
873 while (entry != NULL) {
874 if (entry->_name == name && entry->_sig == sig) {
875 return false;
876 }
877 entry = entry->_next;
878 }
879
880 // No duplicate is found, allocate a new entry and fill it.
881 entry = new NameSigHash();
882 entry->_name = name;
883 entry->_sig = sig;
884
885 // Insert into hash table
886 entry->_next = table[index];
887 table[index] = entry;
888
889 return true;
890 }
891
892 // Side-effects: populates the _local_interfaces field
893 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
894 const int itfs_len,
895 ConstantPool* const cp,
896 bool* const has_nonstatic_concrete_methods,
897 TRAPS) {
898 assert(stream != NULL, "invariant");
899 assert(cp != NULL, "invariant");
900 assert(has_nonstatic_concrete_methods != NULL, "invariant");
901
902 if (itfs_len == 0) {
903 _local_interfaces = Universe::the_empty_klass_array();
904 } else {
905 assert(itfs_len > 0, "only called for len>0");
906 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
907
908 int index;
909 for (index = 0; index < itfs_len; index++) {
910 const u2 interface_index = stream->get_u2(CHECK);
911 Klass* interf;
912 check_property(
913 valid_klass_reference_at(interface_index),
914 "Interface name has bad constant pool index %u in class file %s",
915 interface_index, CHECK);
916 if (cp->tag_at(interface_index).is_klass()) {
917 interf = cp->resolved_klass_at(interface_index);
918 } else {
919 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
920
921 // Don't need to check legal name because it's checked when parsing constant pool.
922 // But need to make sure it's not an array type.
923 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
924 "Bad interface name in class file %s", CHECK);
925
926 // Call resolve_super so classcircularity is checked
927 interf = SystemDictionary::resolve_super_or_fail(
928 _class_name,
929 unresolved_klass,
930 Handle(THREAD, _loader_data->class_loader()),
931 _protection_domain,
932 false,
933 CHECK);
934 }
935
936 if (!interf->is_interface()) {
937 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
938 "Implementing class");
939 }
940
941 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
942 *has_nonstatic_concrete_methods = true;
943 }
944 _local_interfaces->at_put(index, interf);
945 }
946
947 if (!_need_verify || itfs_len <= 1) {
948 return;
949 }
950
951 // Check if there's any duplicates in interfaces
952 ResourceMark rm(THREAD);
953 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
954 NameSigHash*,
955 HASH_ROW_SIZE);
956 initialize_hashtable(interface_names);
957 bool dup = false;
958 const Symbol* name = NULL;
959 {
960 debug_only(NoSafepointVerifier nsv;)
961 for (index = 0; index < itfs_len; index++) {
962 const Klass* const k = _local_interfaces->at(index);
963 name = InstanceKlass::cast(k)->name();
964 // If no duplicates, add (name, NULL) in hashtable interface_names.
965 if (!put_after_lookup(name, NULL, interface_names)) {
966 dup = true;
967 break;
968 }
969 }
970 }
971 if (dup) {
972 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
973 name->as_C_string(), CHECK);
974 }
975 }
976 }
977
978 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
979 int constantvalue_index,
980 int signature_index,
981 TRAPS) const {
982 // Make sure the constant pool entry is of a type appropriate to this field
983 guarantee_property(
984 (constantvalue_index > 0 &&
985 constantvalue_index < cp->length()),
986 "Bad initial value index %u in ConstantValue attribute in class file %s",
987 constantvalue_index, CHECK);
988
989 const constantTag value_type = cp->tag_at(constantvalue_index);
990 switch(cp->basic_type_for_signature_at(signature_index)) {
991 case T_LONG: {
992 guarantee_property(value_type.is_long(),
993 "Inconsistent constant value type in class file %s",
994 CHECK);
995 break;
996 }
997 case T_FLOAT: {
998 guarantee_property(value_type.is_float(),
999 "Inconsistent constant value type in class file %s",
1000 CHECK);
1001 break;
1002 }
1003 case T_DOUBLE: {
1004 guarantee_property(value_type.is_double(),
1005 "Inconsistent constant value type in class file %s",
1006 CHECK);
1007 break;
1008 }
1009 case T_BYTE:
1010 case T_CHAR:
1011 case T_SHORT:
1012 case T_BOOLEAN:
1013 case T_INT: {
1014 guarantee_property(value_type.is_int(),
1015 "Inconsistent constant value type in class file %s",
1016 CHECK);
1017 break;
1018 }
1019 case T_OBJECT: {
1020 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1021 && value_type.is_string()),
1022 "Bad string initial value in class file %s",
1023 CHECK);
1024 break;
1025 }
1026 default: {
1027 classfile_parse_error("Unable to set initial value %u in class file %s",
1028 constantvalue_index,
1029 CHECK);
1030 }
1031 }
1032 }
1033
1034 class AnnotationCollector : public ResourceObj{
1035 public:
1036 enum Location { _in_field, _in_method, _in_class };
1037 enum ID {
1038 _unknown = 0,
1039 _method_CallerSensitive,
1040 _method_ForceInline,
1041 _method_DontInline,
1042 _method_InjectedProfile,
1043 _method_LambdaForm_Compiled,
1044 _method_LambdaForm_Hidden,
1045 _method_HotSpotIntrinsicCandidate,
1046 _jdk_internal_vm_annotation_Contended,
1047 _field_Stable,
1048 _jdk_internal_vm_annotation_ReservedStackAccess,
1049 _jvm_internal_value_ValueCapableClass,
1050 _annotation_LIMIT
1051 };
1052 const Location _location;
1053 int _annotations_present;
1054 u2 _contended_group;
1055
1056 AnnotationCollector(Location location)
1057 : _location(location), _annotations_present(0)
1058 {
1059 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1060 }
1061 // If this annotation name has an ID, report it (or _none).
1062 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1063 // Set the annotation name:
1064 void set_annotation(ID id) {
1065 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1066 _annotations_present |= nth_bit((int)id);
1067 }
1068
1069 void remove_annotation(ID id) {
1070 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1071 _annotations_present &= ~nth_bit((int)id);
1072 }
1073
1074 // Report if the annotation is present.
1075 bool has_any_annotations() const { return _annotations_present != 0; }
1076 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1077
1078 void set_contended_group(u2 group) { _contended_group = group; }
1079 u2 contended_group() const { return _contended_group; }
1080
1081 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1082
1083 void set_stable(bool stable) { set_annotation(_field_Stable); }
1084 bool is_stable() const { return has_annotation(_field_Stable); }
1085
1086 bool is_value_capable_class() const { return has_annotation(_jvm_internal_value_ValueCapableClass); }
1087 };
1088
1089 // This class also doubles as a holder for metadata cleanup.
1090 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1091 private:
1092 ClassLoaderData* _loader_data;
1093 AnnotationArray* _field_annotations;
1094 AnnotationArray* _field_type_annotations;
1095 public:
1096 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1097 AnnotationCollector(_in_field),
1098 _loader_data(loader_data),
1099 _field_annotations(NULL),
1100 _field_type_annotations(NULL) {}
1101 ~FieldAnnotationCollector();
1102 void apply_to(FieldInfo* f);
1103 AnnotationArray* field_annotations() { return _field_annotations; }
1104 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1105
1106 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1107 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1108 };
1109
1110 class MethodAnnotationCollector : public AnnotationCollector{
1111 public:
1112 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1113 void apply_to(const methodHandle& m);
1114 };
1115
1116 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1117 public:
1118 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1119 void apply_to(InstanceKlass* ik);
1120 };
1121
1122
1123 static int skip_annotation_value(const u1*, int, int); // fwd decl
1124
1125 // Safely increment index by val if does not pass limit
1126 #define SAFE_ADD(index, limit, val) \
1127 if (index >= limit - val) return limit; \
1128 index += val;
1129
1130 // Skip an annotation. Return >=limit if there is any problem.
1131 static int skip_annotation(const u1* buffer, int limit, int index) {
1132 assert(buffer != NULL, "invariant");
1133 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1134 // value := switch (tag:u1) { ... }
1135 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1136 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1137 while (--nmem >= 0 && index < limit) {
1138 SAFE_ADD(index, limit, 2); // skip member
1139 index = skip_annotation_value(buffer, limit, index);
1140 }
1141 return index;
1142 }
1143
1144 // Skip an annotation value. Return >=limit if there is any problem.
1145 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1146 assert(buffer != NULL, "invariant");
1147
1148 // value := switch (tag:u1) {
1149 // case B, C, I, S, Z, D, F, J, c: con:u2;
1150 // case e: e_class:u2 e_name:u2;
1151 // case s: s_con:u2;
1152 // case [: do(nval:u2) {value};
1153 // case @: annotation;
1154 // case s: s_con:u2;
1155 // }
1156 SAFE_ADD(index, limit, 1); // read tag
1157 const u1 tag = buffer[index - 1];
1158 switch (tag) {
1159 case 'B':
1160 case 'C':
1161 case 'I':
1162 case 'S':
1163 case 'Z':
1164 case 'D':
1165 case 'F':
1166 case 'J':
1167 case 'c':
1168 case 's':
1169 SAFE_ADD(index, limit, 2); // skip con or s_con
1170 break;
1171 case 'e':
1172 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1173 break;
1174 case '[':
1175 {
1176 SAFE_ADD(index, limit, 2); // read nval
1177 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1178 while (--nval >= 0 && index < limit) {
1179 index = skip_annotation_value(buffer, limit, index);
1180 }
1181 }
1182 break;
1183 case '@':
1184 index = skip_annotation(buffer, limit, index);
1185 break;
1186 default:
1187 return limit; // bad tag byte
1188 }
1189 return index;
1190 }
1191
1192 // Sift through annotations, looking for those significant to the VM:
1193 static void parse_annotations(const ConstantPool* const cp,
1194 const u1* buffer, int limit,
1195 AnnotationCollector* coll,
1196 ClassLoaderData* loader_data,
1197 TRAPS) {
1198
1199 assert(cp != NULL, "invariant");
1200 assert(buffer != NULL, "invariant");
1201 assert(coll != NULL, "invariant");
1202 assert(loader_data != NULL, "invariant");
1203
1204 // annotations := do(nann:u2) {annotation}
1205 int index = 2; // read nann
1206 if (index >= limit) return;
1207 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1208 enum { // initial annotation layout
1209 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1210 count_off = 2, // u2 such as 1 (one value)
1211 member_off = 4, // utf8 such as 'value'
1212 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1213 e_tag_val = 'e',
1214 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1215 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1216 e_size = 11, // end of 'e' annotation
1217 c_tag_val = 'c', // payload is type
1218 c_con_off = 7, // utf8 payload, such as 'I'
1219 c_size = 9, // end of 'c' annotation
1220 s_tag_val = 's', // payload is String
1221 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1222 s_size = 9,
1223 min_size = 6 // smallest possible size (zero members)
1224 };
1225 // Cannot add min_size to index in case of overflow MAX_INT
1226 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1227 int index0 = index;
1228 index = skip_annotation(buffer, limit, index);
1229 const u1* const abase = buffer + index0;
1230 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1231 const int count = Bytes::get_Java_u2((address)abase + count_off);
1232 const Symbol* const aname = check_symbol_at(cp, atype);
1233 if (aname == NULL) break; // invalid annotation name
1234 const Symbol* member = NULL;
1235 if (count >= 1) {
1236 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1237 member = check_symbol_at(cp, member_index);
1238 if (member == NULL) break; // invalid member name
1239 }
1240
1241 // Here is where parsing particular annotations will take place.
1242 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1243 if (AnnotationCollector::_unknown == id) continue;
1244 coll->set_annotation(id);
1245
1246 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1247 // @Contended can optionally specify the contention group.
1248 //
1249 // Contended group defines the equivalence class over the fields:
1250 // the fields within the same contended group are not treated distinct.
1251 // The only exception is default group, which does not incur the
1252 // equivalence. Naturally, contention group for classes is meaningless.
1253 //
1254 // While the contention group is specified as String, annotation
1255 // values are already interned, and we might as well use the constant
1256 // pool index as the group tag.
1257 //
1258 u2 group_index = 0; // default contended group
1259 if (count == 1
1260 && s_size == (index - index0) // match size
1261 && s_tag_val == *(abase + tag_off)
1262 && member == vmSymbols::value_name()) {
1263 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1264 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1265 group_index = 0; // default contended group
1266 }
1267 }
1268 coll->set_contended_group(group_index);
1269 }
1270 }
1271 }
1272
1273
1274 // Parse attributes for a field.
1275 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1276 u2 attributes_count,
1277 bool is_static, u2 signature_index,
1278 u2* const constantvalue_index_addr,
1279 bool* const is_synthetic_addr,
1280 u2* const generic_signature_index_addr,
1281 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1282 TRAPS) {
1283 assert(cfs != NULL, "invariant");
1284 assert(constantvalue_index_addr != NULL, "invariant");
1285 assert(is_synthetic_addr != NULL, "invariant");
1286 assert(generic_signature_index_addr != NULL, "invariant");
1287 assert(parsed_annotations != NULL, "invariant");
1288 assert(attributes_count > 0, "attributes_count should be greater than 0");
1289
1290 u2 constantvalue_index = 0;
1291 u2 generic_signature_index = 0;
1292 bool is_synthetic = false;
1293 const u1* runtime_visible_annotations = NULL;
1294 int runtime_visible_annotations_length = 0;
1295 const u1* runtime_invisible_annotations = NULL;
1296 int runtime_invisible_annotations_length = 0;
1297 const u1* runtime_visible_type_annotations = NULL;
1298 int runtime_visible_type_annotations_length = 0;
1299 const u1* runtime_invisible_type_annotations = NULL;
1300 int runtime_invisible_type_annotations_length = 0;
1301 bool runtime_invisible_annotations_exists = false;
1302 bool runtime_invisible_type_annotations_exists = false;
1303 const ConstantPool* const cp = _cp;
1304
1305 while (attributes_count--) {
1306 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1307 const u2 attribute_name_index = cfs->get_u2_fast();
1308 const u4 attribute_length = cfs->get_u4_fast();
1309 check_property(valid_symbol_at(attribute_name_index),
1310 "Invalid field attribute index %u in class file %s",
1311 attribute_name_index,
1312 CHECK);
1313
1314 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1315 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1316 // ignore if non-static
1317 if (constantvalue_index != 0) {
1318 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1319 }
1320 check_property(
1321 attribute_length == 2,
1322 "Invalid ConstantValue field attribute length %u in class file %s",
1323 attribute_length, CHECK);
1324
1325 constantvalue_index = cfs->get_u2(CHECK);
1326 if (_need_verify) {
1327 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1328 }
1329 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1330 if (attribute_length != 0) {
1331 classfile_parse_error(
1332 "Invalid Synthetic field attribute length %u in class file %s",
1333 attribute_length, CHECK);
1334 }
1335 is_synthetic = true;
1336 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1337 if (attribute_length != 0) {
1338 classfile_parse_error(
1339 "Invalid Deprecated field attribute length %u in class file %s",
1340 attribute_length, CHECK);
1341 }
1342 } else if (_major_version >= JAVA_1_5_VERSION) {
1343 if (attribute_name == vmSymbols::tag_signature()) {
1344 if (generic_signature_index != 0) {
1345 classfile_parse_error(
1346 "Multiple Signature attributes for field in class file %s", CHECK);
1347 }
1348 if (attribute_length != 2) {
1349 classfile_parse_error(
1350 "Wrong size %u for field's Signature attribute in class file %s",
1351 attribute_length, CHECK);
1352 }
1353 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1354 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1355 if (runtime_visible_annotations != NULL) {
1356 classfile_parse_error(
1357 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1358 }
1359 runtime_visible_annotations_length = attribute_length;
1360 runtime_visible_annotations = cfs->current();
1361 assert(runtime_visible_annotations != NULL, "null visible annotations");
1362 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1363 parse_annotations(cp,
1364 runtime_visible_annotations,
1365 runtime_visible_annotations_length,
1366 parsed_annotations,
1367 _loader_data,
1368 CHECK);
1369 cfs->skip_u1_fast(runtime_visible_annotations_length);
1370 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1371 if (runtime_invisible_annotations_exists) {
1372 classfile_parse_error(
1373 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1374 }
1375 runtime_invisible_annotations_exists = true;
1376 if (PreserveAllAnnotations) {
1377 runtime_invisible_annotations_length = attribute_length;
1378 runtime_invisible_annotations = cfs->current();
1379 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1380 }
1381 cfs->skip_u1(attribute_length, CHECK);
1382 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1383 if (runtime_visible_type_annotations != NULL) {
1384 classfile_parse_error(
1385 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1386 }
1387 runtime_visible_type_annotations_length = attribute_length;
1388 runtime_visible_type_annotations = cfs->current();
1389 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1390 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1391 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1392 if (runtime_invisible_type_annotations_exists) {
1393 classfile_parse_error(
1394 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1395 } else {
1396 runtime_invisible_type_annotations_exists = true;
1397 }
1398 if (PreserveAllAnnotations) {
1399 runtime_invisible_type_annotations_length = attribute_length;
1400 runtime_invisible_type_annotations = cfs->current();
1401 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1402 }
1403 cfs->skip_u1(attribute_length, CHECK);
1404 } else {
1405 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1406 }
1407 } else {
1408 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1409 }
1410 }
1411
1412 *constantvalue_index_addr = constantvalue_index;
1413 *is_synthetic_addr = is_synthetic;
1414 *generic_signature_index_addr = generic_signature_index;
1415 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1416 runtime_visible_annotations_length,
1417 runtime_invisible_annotations,
1418 runtime_invisible_annotations_length,
1419 CHECK);
1420 parsed_annotations->set_field_annotations(a);
1421 a = assemble_annotations(runtime_visible_type_annotations,
1422 runtime_visible_type_annotations_length,
1423 runtime_invisible_type_annotations,
1424 runtime_invisible_type_annotations_length,
1425 CHECK);
1426 parsed_annotations->set_field_type_annotations(a);
1427 return;
1428 }
1429
1430
1431 // Field allocation types. Used for computing field offsets.
1432
1433 enum FieldAllocationType {
1434 STATIC_OOP, // Oops
1435 STATIC_BYTE, // Boolean, Byte, char
1436 STATIC_SHORT, // shorts
1437 STATIC_WORD, // ints
1438 STATIC_DOUBLE, // aligned long or double
1439 STATIC_VALUETYPE, // Value types
1440 NONSTATIC_OOP,
1441 NONSTATIC_BYTE,
1442 NONSTATIC_SHORT,
1443 NONSTATIC_WORD,
1444 NONSTATIC_DOUBLE,
1445 NONSTATIC_VALUETYPE,
1446 MAX_FIELD_ALLOCATION_TYPE,
1447 BAD_ALLOCATION_TYPE = -1
1448 };
1449
1450 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1451 BAD_ALLOCATION_TYPE, // 0
1452 BAD_ALLOCATION_TYPE, // 1
1453 BAD_ALLOCATION_TYPE, // 2
1454 BAD_ALLOCATION_TYPE, // 3
1455 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1456 NONSTATIC_SHORT, // T_CHAR = 5,
1457 NONSTATIC_WORD, // T_FLOAT = 6,
1458 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1459 NONSTATIC_BYTE, // T_BYTE = 8,
1460 NONSTATIC_SHORT, // T_SHORT = 9,
1461 NONSTATIC_WORD, // T_INT = 10,
1462 NONSTATIC_DOUBLE, // T_LONG = 11,
1463 NONSTATIC_OOP, // T_OBJECT = 12,
1464 NONSTATIC_OOP, // T_ARRAY = 13,
1465 NONSTATIC_VALUETYPE, // T_VALUETYPE = 14,
1466 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1467 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1468 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1469 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1470 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1471 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1472 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1473 BAD_ALLOCATION_TYPE, // 0
1474 BAD_ALLOCATION_TYPE, // 1
1475 BAD_ALLOCATION_TYPE, // 2
1476 BAD_ALLOCATION_TYPE, // 3
1477 STATIC_BYTE , // T_BOOLEAN = 4,
1478 STATIC_SHORT, // T_CHAR = 5,
1479 STATIC_WORD, // T_FLOAT = 6,
1480 STATIC_DOUBLE, // T_DOUBLE = 7,
1481 STATIC_BYTE, // T_BYTE = 8,
1482 STATIC_SHORT, // T_SHORT = 9,
1483 STATIC_WORD, // T_INT = 10,
1484 STATIC_DOUBLE, // T_LONG = 11,
1485 STATIC_OOP, // T_OBJECT = 12,
1486 STATIC_OOP, // T_ARRAY = 13,
1487 STATIC_VALUETYPE, // T_VALUETYPE = 14,
1488 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1489 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1490 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1491 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1492 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1493 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1494 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1495 };
1496
1497 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1498 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1499 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1500 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1501 return result;
1502 }
1503
1504 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1505 public:
1506 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1507
1508 FieldAllocationCount() {
1509 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1510 count[i] = 0;
1511 }
1512 }
1513
1514 FieldAllocationType update(bool is_static, BasicType type) {
1515 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1516 if (atype != BAD_ALLOCATION_TYPE) {
1517 // Make sure there is no overflow with injected fields.
1518 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1519 count[atype]++;
1520 }
1521 return atype;
1522 }
1523 };
1524
1525 // Side-effects: populates the _fields, _fields_annotations,
1526 // _fields_type_annotations fields
1527 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1528 bool is_interface,
1529 FieldAllocationCount* const fac,
1530 ConstantPool* cp,
1531 const int cp_size,
1532 u2* const java_fields_count_ptr,
1533 TRAPS) {
1534
1535 assert(cfs != NULL, "invariant");
1536 assert(fac != NULL, "invariant");
1537 assert(cp != NULL, "invariant");
1538 assert(java_fields_count_ptr != NULL, "invariant");
1539
1540 assert(NULL == _fields, "invariant");
1541 assert(NULL == _fields_annotations, "invariant");
1542 assert(NULL == _fields_type_annotations, "invariant");
1543
1544 cfs->guarantee_more(2, CHECK); // length
1545 const u2 length = cfs->get_u2_fast();
1546 *java_fields_count_ptr = length;
1547
1548 int num_injected = 0;
1549 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1550 &num_injected);
1551 const int total_fields = length + num_injected;
1552
1553 // The field array starts with tuples of shorts
1554 // [access, name index, sig index, initial value index, byte offset].
1555 // A generic signature slot only exists for field with generic
1556 // signature attribute. And the access flag is set with
1557 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1558 // signature slots are at the end of the field array and after all
1559 // other fields data.
1560 //
1561 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1562 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1563 // ...
1564 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1565 // [generic signature index]
1566 // [generic signature index]
1567 // ...
1568 //
1569 // Allocate a temporary resource array for field data. For each field,
1570 // a slot is reserved in the temporary array for the generic signature
1571 // index. After parsing all fields, the data are copied to a permanent
1572 // array and any unused slots will be discarded.
1573 ResourceMark rm(THREAD);
1574 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1575 u2,
1576 total_fields * (FieldInfo::field_slots + 1));
1577
1578 // The generic signature slots start after all other fields' data.
1579 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1580 int num_generic_signature = 0;
1581 for (int n = 0; n < length; n++) {
1582 // access_flags, name_index, descriptor_index, attributes_count
1583 cfs->guarantee_more(8, CHECK);
1584
1585 AccessFlags access_flags;
1586 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1587 verify_legal_field_modifiers(flags, is_interface, CHECK);
1588 access_flags.set_flags(flags);
1589
1590 const u2 name_index = cfs->get_u2_fast();
1591 check_property(valid_symbol_at(name_index),
1592 "Invalid constant pool index %u for field name in class file %s",
1593 name_index, CHECK);
1594 const Symbol* const name = cp->symbol_at(name_index);
1595 verify_legal_field_name(name, CHECK);
1596
1597 const u2 signature_index = cfs->get_u2_fast();
1598 check_property(valid_symbol_at(signature_index),
1599 "Invalid constant pool index %u for field signature in class file %s",
1600 signature_index, CHECK);
1601 const Symbol* const sig = cp->symbol_at(signature_index);
1602 verify_legal_field_signature(name, sig, CHECK);
1603 if (sig->starts_with("Q")) {
1604 _has_value_fields = true;
1605 }
1606
1607 u2 constantvalue_index = 0;
1608 bool is_synthetic = false;
1609 u2 generic_signature_index = 0;
1610 const bool is_static = access_flags.is_static();
1611 FieldAnnotationCollector parsed_annotations(_loader_data);
1612
1613 const u2 attributes_count = cfs->get_u2_fast();
1614 if (attributes_count > 0) {
1615 parse_field_attributes(cfs,
1616 attributes_count,
1617 is_static,
1618 signature_index,
1619 &constantvalue_index,
1620 &is_synthetic,
1621 &generic_signature_index,
1622 &parsed_annotations,
1623 CHECK);
1624
1625 if (parsed_annotations.field_annotations() != NULL) {
1626 if (_fields_annotations == NULL) {
1627 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1628 _loader_data, length, NULL,
1629 CHECK);
1630 }
1631 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1632 parsed_annotations.set_field_annotations(NULL);
1633 }
1634 if (parsed_annotations.field_type_annotations() != NULL) {
1635 if (_fields_type_annotations == NULL) {
1636 _fields_type_annotations =
1637 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1638 length,
1639 NULL,
1640 CHECK);
1641 }
1642 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1643 parsed_annotations.set_field_type_annotations(NULL);
1644 }
1645
1646 if (is_synthetic) {
1647 access_flags.set_is_synthetic();
1648 }
1649 if (generic_signature_index != 0) {
1650 access_flags.set_field_has_generic_signature();
1651 fa[generic_signature_slot] = generic_signature_index;
1652 generic_signature_slot ++;
1653 num_generic_signature ++;
1654 }
1655 }
1656
1657 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1658 field->initialize(access_flags.as_short(),
1659 name_index,
1660 signature_index,
1661 constantvalue_index);
1662 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1663
1664 // Remember how many oops we encountered and compute allocation type
1665 const FieldAllocationType atype = fac->update(is_static, type);
1666 field->set_allocation_type(atype);
1667
1668 // After field is initialized with type, we can augment it with aux info
1669 if (parsed_annotations.has_any_annotations())
1670 parsed_annotations.apply_to(field);
1671 }
1672
1673 int index = length;
1674 if (num_injected != 0) {
1675 for (int n = 0; n < num_injected; n++) {
1676 // Check for duplicates
1677 if (injected[n].may_be_java) {
1678 const Symbol* const name = injected[n].name();
1679 const Symbol* const signature = injected[n].signature();
1680 bool duplicate = false;
1681 for (int i = 0; i < length; i++) {
1682 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1683 if (name == cp->symbol_at(f->name_index()) &&
1684 signature == cp->symbol_at(f->signature_index())) {
1685 // Symbol is desclared in Java so skip this one
1686 duplicate = true;
1687 break;
1688 }
1689 }
1690 if (duplicate) {
1691 // These will be removed from the field array at the end
1692 continue;
1693 }
1694 }
1695
1696 // Injected field
1697 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1698 field->initialize(JVM_ACC_FIELD_INTERNAL,
1699 injected[n].name_index,
1700 injected[n].signature_index,
1701 0);
1702
1703 const BasicType type = FieldType::basic_type(injected[n].signature());
1704
1705 // Remember how many oops we encountered and compute allocation type
1706 const FieldAllocationType atype = fac->update(false, type);
1707 field->set_allocation_type(atype);
1708 index++;
1709 }
1710 }
1711
1712 assert(NULL == _fields, "invariant");
1713
1714 _fields =
1715 MetadataFactory::new_array<u2>(_loader_data,
1716 index * FieldInfo::field_slots + num_generic_signature,
1717 CHECK);
1718 // Sometimes injected fields already exist in the Java source so
1719 // the fields array could be too long. In that case the
1720 // fields array is trimed. Also unused slots that were reserved
1721 // for generic signature indexes are discarded.
1722 {
1723 int i = 0;
1724 for (; i < index * FieldInfo::field_slots; i++) {
1725 _fields->at_put(i, fa[i]);
1726 }
1727 for (int j = total_fields * FieldInfo::field_slots;
1728 j < generic_signature_slot; j++) {
1729 _fields->at_put(i++, fa[j]);
1730 }
1731 assert(_fields->length() == i, "");
1732 }
1733
1734 if (_need_verify && length > 1) {
1735 // Check duplicated fields
1736 ResourceMark rm(THREAD);
1737 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1738 THREAD, NameSigHash*, HASH_ROW_SIZE);
1739 initialize_hashtable(names_and_sigs);
1740 bool dup = false;
1741 const Symbol* name = NULL;
1742 const Symbol* sig = NULL;
1743 {
1744 debug_only(NoSafepointVerifier nsv;)
1745 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1746 name = fs.name();
1747 sig = fs.signature();
1748 // If no duplicates, add name/signature in hashtable names_and_sigs.
1749 if (!put_after_lookup(name, sig, names_and_sigs)) {
1750 dup = true;
1751 break;
1752 }
1753 }
1754 }
1755 if (dup) {
1756 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1757 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1758 }
1759 }
1760 }
1761
1762
1763 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1764 u4 code_length,
1765 u4 exception_table_length,
1766 TRAPS) {
1767 assert(cfs != NULL, "invariant");
1768
1769 const unsafe_u2* const exception_table_start = cfs->current();
1770 assert(exception_table_start != NULL, "null exception table");
1771
1772 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1773 // end_pc,
1774 // handler_pc,
1775 // catch_type_index
1776
1777 // Will check legal target after parsing code array in verifier.
1778 if (_need_verify) {
1779 for (unsigned int i = 0; i < exception_table_length; i++) {
1780 const u2 start_pc = cfs->get_u2_fast();
1781 const u2 end_pc = cfs->get_u2_fast();
1782 const u2 handler_pc = cfs->get_u2_fast();
1783 const u2 catch_type_index = cfs->get_u2_fast();
1784 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1785 "Illegal exception table range in class file %s",
1786 CHECK_NULL);
1787 guarantee_property(handler_pc < code_length,
1788 "Illegal exception table handler in class file %s",
1789 CHECK_NULL);
1790 if (catch_type_index != 0) {
1791 guarantee_property(valid_klass_reference_at(catch_type_index),
1792 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1793 }
1794 }
1795 } else {
1796 cfs->skip_u2_fast(exception_table_length * 4);
1797 }
1798 return exception_table_start;
1799 }
1800
1801 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1802 u4 code_length,
1803 CompressedLineNumberWriteStream**const write_stream,
1804 TRAPS) {
1805
1806 const ClassFileStream* const cfs = _stream;
1807 unsigned int num_entries = cfs->get_u2(CHECK);
1808
1809 // Each entry is a u2 start_pc, and a u2 line_number
1810 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1811
1812 // Verify line number attribute and table length
1813 check_property(
1814 code_attribute_length == sizeof(u2) + length_in_bytes,
1815 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1816
1817 cfs->guarantee_more(length_in_bytes, CHECK);
1818
1819 if ((*write_stream) == NULL) {
1820 if (length_in_bytes > fixed_buffer_size) {
1821 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1822 } else {
1823 (*write_stream) = new CompressedLineNumberWriteStream(
1824 _linenumbertable_buffer, fixed_buffer_size);
1825 }
1826 }
1827
1828 while (num_entries-- > 0) {
1829 const u2 bci = cfs->get_u2_fast(); // start_pc
1830 const u2 line = cfs->get_u2_fast(); // line_number
1831 guarantee_property(bci < code_length,
1832 "Invalid pc in LineNumberTable in class file %s", CHECK);
1833 (*write_stream)->write_pair(bci, line);
1834 }
1835 }
1836
1837
1838 class LVT_Hash : public AllStatic {
1839 public:
1840
1841 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1842 /*
1843 * 3-tuple start_bci/length/slot has to be unique key,
1844 * so the following comparison seems to be redundant:
1845 * && elem->name_cp_index == entry->_elem->name_cp_index
1846 */
1847 return (e0.start_bci == e1.start_bci &&
1848 e0.length == e1.length &&
1849 e0.name_cp_index == e1.name_cp_index &&
1850 e0.slot == e1.slot);
1851 }
1852
1853 static unsigned int hash(LocalVariableTableElement const& e0) {
1854 unsigned int raw_hash = e0.start_bci;
1855
1856 raw_hash = e0.length + raw_hash * 37;
1857 raw_hash = e0.name_cp_index + raw_hash * 37;
1858 raw_hash = e0.slot + raw_hash * 37;
1859
1860 return raw_hash;
1861 }
1862 };
1863
1864
1865 // Class file LocalVariableTable elements.
1866 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1867 public:
1868 u2 start_bci;
1869 u2 length;
1870 u2 name_cp_index;
1871 u2 descriptor_cp_index;
1872 u2 slot;
1873 };
1874
1875 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1876 LocalVariableTableElement* const lvt) {
1877 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1878 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1879 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1880 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1881 lvt->signature_cp_index = 0;
1882 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1883 }
1884
1885 // Function is used to parse both attributes:
1886 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1887 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1888 u4 code_length,
1889 u2 max_locals,
1890 u4 code_attribute_length,
1891 u2* const localvariable_table_length,
1892 bool isLVTT,
1893 TRAPS) {
1894 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1895 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1896 const unsigned int size =
1897 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1898
1899 const ConstantPool* const cp = _cp;
1900
1901 // Verify local variable table attribute has right length
1902 if (_need_verify) {
1903 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1904 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1905 }
1906
1907 const unsafe_u2* const localvariable_table_start = cfs->current();
1908 assert(localvariable_table_start != NULL, "null local variable table");
1909 if (!_need_verify) {
1910 cfs->skip_u2_fast(size);
1911 } else {
1912 cfs->guarantee_more(size * 2, CHECK_NULL);
1913 for(int i = 0; i < (*localvariable_table_length); i++) {
1914 const u2 start_pc = cfs->get_u2_fast();
1915 const u2 length = cfs->get_u2_fast();
1916 const u2 name_index = cfs->get_u2_fast();
1917 const u2 descriptor_index = cfs->get_u2_fast();
1918 const u2 index = cfs->get_u2_fast();
1919 // Assign to a u4 to avoid overflow
1920 const u4 end_pc = (u4)start_pc + (u4)length;
1921
1922 if (start_pc >= code_length) {
1923 classfile_parse_error(
1924 "Invalid start_pc %u in %s in class file %s",
1925 start_pc, tbl_name, CHECK_NULL);
1926 }
1927 if (end_pc > code_length) {
1928 classfile_parse_error(
1929 "Invalid length %u in %s in class file %s",
1930 length, tbl_name, CHECK_NULL);
1931 }
1932 const int cp_size = cp->length();
1933 guarantee_property(valid_symbol_at(name_index),
1934 "Name index %u in %s has bad constant type in class file %s",
1935 name_index, tbl_name, CHECK_NULL);
1936 guarantee_property(valid_symbol_at(descriptor_index),
1937 "Signature index %u in %s has bad constant type in class file %s",
1938 descriptor_index, tbl_name, CHECK_NULL);
1939
1940 const Symbol* const name = cp->symbol_at(name_index);
1941 const Symbol* const sig = cp->symbol_at(descriptor_index);
1942 verify_legal_field_name(name, CHECK_NULL);
1943 u2 extra_slot = 0;
1944 if (!isLVTT) {
1945 verify_legal_field_signature(name, sig, CHECK_NULL);
1946
1947 // 4894874: check special cases for double and long local variables
1948 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1949 sig == vmSymbols::type_signature(T_LONG)) {
1950 extra_slot = 1;
1951 }
1952 }
1953 guarantee_property((index + extra_slot) < max_locals,
1954 "Invalid index %u in %s in class file %s",
1955 index, tbl_name, CHECK_NULL);
1956 }
1957 }
1958 return localvariable_table_start;
1959 }
1960
1961
1962 void ClassFileParser::parse_type_array(u2 array_length,
1963 u4 code_length,
1964 u4* const u1_index,
1965 u4* const u2_index,
1966 u1* const u1_array,
1967 u2* const u2_array,
1968 TRAPS) {
1969 const ClassFileStream* const cfs = _stream;
1970 u2 index = 0; // index in the array with long/double occupying two slots
1971 u4 i1 = *u1_index;
1972 u4 i2 = *u2_index + 1;
1973 for(int i = 0; i < array_length; i++) {
1974 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1975 index++;
1976 if (tag == ITEM_Long || tag == ITEM_Double) {
1977 index++;
1978 } else if (tag == ITEM_Object) {
1979 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1980 guarantee_property(valid_klass_reference_at(class_index),
1981 "Bad class index %u in StackMap in class file %s",
1982 class_index, CHECK);
1983 } else if (tag == ITEM_Uninitialized) {
1984 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1985 guarantee_property(
1986 offset < code_length,
1987 "Bad uninitialized type offset %u in StackMap in class file %s",
1988 offset, CHECK);
1989 } else {
1990 guarantee_property(
1991 tag <= (u1)ITEM_Uninitialized,
1992 "Unknown variable type %u in StackMap in class file %s",
1993 tag, CHECK);
1994 }
1995 }
1996 u2_array[*u2_index] = index;
1997 *u1_index = i1;
1998 *u2_index = i2;
1999 }
2000
2001 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
2002 u4 code_attribute_length,
2003 bool need_verify,
2004 TRAPS) {
2005 assert(cfs != NULL, "invariant");
2006
2007 if (0 == code_attribute_length) {
2008 return NULL;
2009 }
2010
2011 const u1* const stackmap_table_start = cfs->current();
2012 assert(stackmap_table_start != NULL, "null stackmap table");
2013
2014 // check code_attribute_length first
2015 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2016
2017 if (!need_verify && !DumpSharedSpaces) {
2018 return NULL;
2019 }
2020 return stackmap_table_start;
2021 }
2022
2023 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2024 u2* const checked_exceptions_length,
2025 u4 method_attribute_length,
2026 TRAPS) {
2027 assert(cfs != NULL, "invariant");
2028 assert(checked_exceptions_length != NULL, "invariant");
2029
2030 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2031 *checked_exceptions_length = cfs->get_u2_fast();
2032 const unsigned int size =
2033 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2034 const unsafe_u2* const checked_exceptions_start = cfs->current();
2035 assert(checked_exceptions_start != NULL, "null checked exceptions");
2036 if (!_need_verify) {
2037 cfs->skip_u2_fast(size);
2038 } else {
2039 // Verify each value in the checked exception table
2040 u2 checked_exception;
2041 const u2 len = *checked_exceptions_length;
2042 cfs->guarantee_more(2 * len, CHECK_NULL);
2043 for (int i = 0; i < len; i++) {
2044 checked_exception = cfs->get_u2_fast();
2045 check_property(
2046 valid_klass_reference_at(checked_exception),
2047 "Exception name has bad type at constant pool %u in class file %s",
2048 checked_exception, CHECK_NULL);
2049 }
2050 }
2051 // check exceptions attribute length
2052 if (_need_verify) {
2053 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2054 sizeof(u2) * size),
2055 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2056 }
2057 return checked_exceptions_start;
2058 }
2059
2060 void ClassFileParser::throwIllegalSignature(const char* type,
2061 const Symbol* name,
2062 const Symbol* sig,
2063 TRAPS) const {
2064 assert(name != NULL, "invariant");
2065 assert(sig != NULL, "invariant");
2066
2067 ResourceMark rm(THREAD);
2068 Exceptions::fthrow(THREAD_AND_LOCATION,
2069 vmSymbols::java_lang_ClassFormatError(),
2070 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2071 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2072 }
2073
2074 AnnotationCollector::ID
2075 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2076 const Symbol* name) {
2077 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2078 // Privileged code can use all annotations. Other code silently drops some.
2079 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2080 loader_data->is_platform_class_loader_data() ||
2081 loader_data->is_anonymous();
2082 switch (sid) {
2083 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2084 if (_location != _in_method) break; // only allow for methods
2085 if (!privileged) break; // only allow in privileged code
2086 return _method_CallerSensitive;
2087 }
2088 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2089 if (_location != _in_method) break; // only allow for methods
2090 if (!privileged) break; // only allow in privileged code
2091 return _method_ForceInline;
2092 }
2093 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2094 if (_location != _in_method) break; // only allow for methods
2095 if (!privileged) break; // only allow in privileged code
2096 return _method_DontInline;
2097 }
2098 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2099 if (_location != _in_method) break; // only allow for methods
2100 if (!privileged) break; // only allow in privileged code
2101 return _method_InjectedProfile;
2102 }
2103 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2104 if (_location != _in_method) break; // only allow for methods
2105 if (!privileged) break; // only allow in privileged code
2106 return _method_LambdaForm_Compiled;
2107 }
2108 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2109 if (_location != _in_method) break; // only allow for methods
2110 if (!privileged) break; // only allow in privileged code
2111 return _method_LambdaForm_Hidden;
2112 }
2113 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2114 if (_location != _in_method) break; // only allow for methods
2115 if (!privileged) break; // only allow in privileged code
2116 return _method_HotSpotIntrinsicCandidate;
2117 }
2118 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2119 if (_location != _in_field) break; // only allow for fields
2120 if (!privileged) break; // only allow in privileged code
2121 return _field_Stable;
2122 }
2123 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2124 if (_location != _in_field && _location != _in_class) {
2125 break; // only allow for fields and classes
2126 }
2127 if (!EnableContended || (RestrictContended && !privileged)) {
2128 break; // honor privileges
2129 }
2130 return _jdk_internal_vm_annotation_Contended;
2131 }
2132 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2133 if (_location != _in_method) break; // only allow for methods
2134 if (RestrictReservedStack && !privileged) break; // honor privileges
2135 return _jdk_internal_vm_annotation_ReservedStackAccess;
2136 }
2137 case vmSymbols::VM_SYMBOL_ENUM_NAME(jvm_internal_value_ValueCapableClass_signature) : {
2138 if (_location != _in_class) {
2139 break;
2140 }
2141 return _jvm_internal_value_ValueCapableClass;
2142 }
2143 default: {
2144 break;
2145 }
2146 }
2147 return AnnotationCollector::_unknown;
2148 }
2149
2150 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2151 if (is_contended())
2152 f->set_contended_group(contended_group());
2153 if (is_stable())
2154 f->set_stable(true);
2155 }
2156
2157 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2158 // If there's an error deallocate metadata for field annotations
2159 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2160 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2161 }
2162
2163 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2164 if (has_annotation(_method_CallerSensitive))
2165 m->set_caller_sensitive(true);
2166 if (has_annotation(_method_ForceInline))
2167 m->set_force_inline(true);
2168 if (has_annotation(_method_DontInline))
2169 m->set_dont_inline(true);
2170 if (has_annotation(_method_InjectedProfile))
2171 m->set_has_injected_profile(true);
2172 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2173 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2174 if (has_annotation(_method_LambdaForm_Hidden))
2175 m->set_hidden(true);
2176 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2177 m->set_intrinsic_candidate(true);
2178 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2179 m->set_has_reserved_stack_access(true);
2180 }
2181
2182 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2183 assert(ik != NULL, "invariant");
2184 ik->set_is_contended(is_contended());
2185 if (is_value_capable_class()) {
2186 ik->set_has_vcc_annotation();
2187 }
2188 }
2189
2190 #define MAX_ARGS_SIZE 255
2191 #define MAX_CODE_SIZE 65535
2192 #define INITIAL_MAX_LVT_NUMBER 256
2193
2194 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2195 *
2196 * Rules for LVT's and LVTT's are:
2197 * - There can be any number of LVT's and LVTT's.
2198 * - If there are n LVT's, it is the same as if there was just
2199 * one LVT containing all the entries from the n LVT's.
2200 * - There may be no more than one LVT entry per local variable.
2201 * Two LVT entries are 'equal' if these fields are the same:
2202 * start_pc, length, name, slot
2203 * - There may be no more than one LVTT entry per each LVT entry.
2204 * Each LVTT entry has to match some LVT entry.
2205 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2206 */
2207 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2208 int lvt_cnt,
2209 u2* const localvariable_table_length,
2210 const unsafe_u2** const localvariable_table_start,
2211 int lvtt_cnt,
2212 u2* const localvariable_type_table_length,
2213 const unsafe_u2** const localvariable_type_table_start,
2214 TRAPS) {
2215
2216 ResourceMark rm(THREAD);
2217
2218 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2219 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2220
2221 LVT_HashTable* const table = new LVT_HashTable();
2222
2223 // To fill LocalVariableTable in
2224 const Classfile_LVT_Element* cf_lvt;
2225 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2226
2227 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2228 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2229 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2230 copy_lvt_element(&cf_lvt[idx], lvt);
2231 // If no duplicates, add LVT elem in hashtable.
2232 if (table->put(*lvt, lvt) == false
2233 && _need_verify
2234 && _major_version >= JAVA_1_5_VERSION) {
2235 classfile_parse_error("Duplicated LocalVariableTable attribute "
2236 "entry for '%s' in class file %s",
2237 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2238 CHECK);
2239 }
2240 }
2241 }
2242
2243 // To merge LocalVariableTable and LocalVariableTypeTable
2244 const Classfile_LVT_Element* cf_lvtt;
2245 LocalVariableTableElement lvtt_elem;
2246
2247 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2248 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2249 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2250 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2251 LocalVariableTableElement** entry = table->get(lvtt_elem);
2252 if (entry == NULL) {
2253 if (_need_verify) {
2254 classfile_parse_error("LVTT entry for '%s' in class file %s "
2255 "does not match any LVT entry",
2256 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2257 CHECK);
2258 }
2259 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2260 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2261 "entry for '%s' in class file %s",
2262 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2263 CHECK);
2264 } else {
2265 // to add generic signatures into LocalVariableTable
2266 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2267 }
2268 }
2269 }
2270 }
2271
2272
2273 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2274 const u1* runtime_visible_annotations,
2275 int runtime_visible_annotations_length,
2276 const u1* runtime_invisible_annotations,
2277 int runtime_invisible_annotations_length,
2278 const u1* runtime_visible_parameter_annotations,
2279 int runtime_visible_parameter_annotations_length,
2280 const u1* runtime_invisible_parameter_annotations,
2281 int runtime_invisible_parameter_annotations_length,
2282 const u1* runtime_visible_type_annotations,
2283 int runtime_visible_type_annotations_length,
2284 const u1* runtime_invisible_type_annotations,
2285 int runtime_invisible_type_annotations_length,
2286 const u1* annotation_default,
2287 int annotation_default_length,
2288 TRAPS) {
2289
2290 AnnotationArray* a;
2291
2292 if (runtime_visible_annotations_length +
2293 runtime_invisible_annotations_length > 0) {
2294 a = assemble_annotations(runtime_visible_annotations,
2295 runtime_visible_annotations_length,
2296 runtime_invisible_annotations,
2297 runtime_invisible_annotations_length,
2298 CHECK);
2299 cm->set_method_annotations(a);
2300 }
2301
2302 if (runtime_visible_parameter_annotations_length +
2303 runtime_invisible_parameter_annotations_length > 0) {
2304 a = assemble_annotations(runtime_visible_parameter_annotations,
2305 runtime_visible_parameter_annotations_length,
2306 runtime_invisible_parameter_annotations,
2307 runtime_invisible_parameter_annotations_length,
2308 CHECK);
2309 cm->set_parameter_annotations(a);
2310 }
2311
2312 if (annotation_default_length > 0) {
2313 a = assemble_annotations(annotation_default,
2314 annotation_default_length,
2315 NULL,
2316 0,
2317 CHECK);
2318 cm->set_default_annotations(a);
2319 }
2320
2321 if (runtime_visible_type_annotations_length +
2322 runtime_invisible_type_annotations_length > 0) {
2323 a = assemble_annotations(runtime_visible_type_annotations,
2324 runtime_visible_type_annotations_length,
2325 runtime_invisible_type_annotations,
2326 runtime_invisible_type_annotations_length,
2327 CHECK);
2328 cm->set_type_annotations(a);
2329 }
2330 }
2331
2332
2333 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2334 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2335 // Method* to save footprint, so we only know the size of the resulting Method* when the
2336 // entire method attribute is parsed.
2337 //
2338 // The promoted_flags parameter is used to pass relevant access_flags
2339 // from the method back up to the containing klass. These flag values
2340 // are added to klass's access_flags.
2341
2342 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2343 bool is_interface,
2344 const ConstantPool* cp,
2345 AccessFlags* const promoted_flags,
2346 TRAPS) {
2347 assert(cfs != NULL, "invariant");
2348 assert(cp != NULL, "invariant");
2349 assert(promoted_flags != NULL, "invariant");
2350
2351 ResourceMark rm(THREAD);
2352 // Parse fixed parts:
2353 // access_flags, name_index, descriptor_index, attributes_count
2354 cfs->guarantee_more(8, CHECK_NULL);
2355
2356 int flags = cfs->get_u2_fast();
2357 const u2 name_index = cfs->get_u2_fast();
2358 const int cp_size = cp->length();
2359 check_property(
2360 valid_symbol_at(name_index),
2361 "Illegal constant pool index %u for method name in class file %s",
2362 name_index, CHECK_NULL);
2363 const Symbol* const name = cp->symbol_at(name_index);
2364 verify_legal_method_name(name, CHECK_NULL);
2365
2366 const u2 signature_index = cfs->get_u2_fast();
2367 guarantee_property(
2368 valid_symbol_at(signature_index),
2369 "Illegal constant pool index %u for method signature in class file %s",
2370 signature_index, CHECK_NULL);
2371 const Symbol* const signature = cp->symbol_at(signature_index);
2372
2373 if (name == vmSymbols::class_initializer_name()) {
2374 // We ignore the other access flags for a valid class initializer.
2375 // (JVM Spec 2nd ed., chapter 4.6)
2376 if (_major_version < 51) { // backward compatibility
2377 flags = JVM_ACC_STATIC;
2378 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2379 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2380 } else {
2381 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2382 }
2383 } else {
2384 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2385 }
2386
2387 if (name == vmSymbols::object_initializer_name() && is_interface) {
2388 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2389 }
2390
2391 int args_size = -1; // only used when _need_verify is true
2392 if (_need_verify) {
2393 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2394 verify_legal_method_signature(name, signature, CHECK_NULL);
2395 if (args_size > MAX_ARGS_SIZE) {
2396 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2397 }
2398 }
2399
2400 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2401
2402 // Default values for code and exceptions attribute elements
2403 u2 max_stack = 0;
2404 u2 max_locals = 0;
2405 u4 code_length = 0;
2406 const u1* code_start = 0;
2407 u2 exception_table_length = 0;
2408 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2409 Array<int>* exception_handlers = Universe::the_empty_int_array();
2410 u2 checked_exceptions_length = 0;
2411 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2412 CompressedLineNumberWriteStream* linenumber_table = NULL;
2413 int linenumber_table_length = 0;
2414 int total_lvt_length = 0;
2415 u2 lvt_cnt = 0;
2416 u2 lvtt_cnt = 0;
2417 bool lvt_allocated = false;
2418 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2419 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2420 u2* localvariable_table_length = NULL;
2421 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2422 u2* localvariable_type_table_length = NULL;
2423 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2424 int method_parameters_length = -1;
2425 const u1* method_parameters_data = NULL;
2426 bool method_parameters_seen = false;
2427 bool parsed_code_attribute = false;
2428 bool parsed_checked_exceptions_attribute = false;
2429 bool parsed_stackmap_attribute = false;
2430 // stackmap attribute - JDK1.5
2431 const u1* stackmap_data = NULL;
2432 int stackmap_data_length = 0;
2433 u2 generic_signature_index = 0;
2434 MethodAnnotationCollector parsed_annotations;
2435 const u1* runtime_visible_annotations = NULL;
2436 int runtime_visible_annotations_length = 0;
2437 const u1* runtime_invisible_annotations = NULL;
2438 int runtime_invisible_annotations_length = 0;
2439 const u1* runtime_visible_parameter_annotations = NULL;
2440 int runtime_visible_parameter_annotations_length = 0;
2441 const u1* runtime_invisible_parameter_annotations = NULL;
2442 int runtime_invisible_parameter_annotations_length = 0;
2443 const u1* runtime_visible_type_annotations = NULL;
2444 int runtime_visible_type_annotations_length = 0;
2445 const u1* runtime_invisible_type_annotations = NULL;
2446 int runtime_invisible_type_annotations_length = 0;
2447 bool runtime_invisible_annotations_exists = false;
2448 bool runtime_invisible_type_annotations_exists = false;
2449 bool runtime_invisible_parameter_annotations_exists = false;
2450 const u1* annotation_default = NULL;
2451 int annotation_default_length = 0;
2452
2453 // Parse code and exceptions attribute
2454 u2 method_attributes_count = cfs->get_u2_fast();
2455 while (method_attributes_count--) {
2456 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2457 const u2 method_attribute_name_index = cfs->get_u2_fast();
2458 const u4 method_attribute_length = cfs->get_u4_fast();
2459 check_property(
2460 valid_symbol_at(method_attribute_name_index),
2461 "Invalid method attribute name index %u in class file %s",
2462 method_attribute_name_index, CHECK_NULL);
2463
2464 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2465 if (method_attribute_name == vmSymbols::tag_code()) {
2466 // Parse Code attribute
2467 if (_need_verify) {
2468 guarantee_property(
2469 !access_flags.is_native() && !access_flags.is_abstract(),
2470 "Code attribute in native or abstract methods in class file %s",
2471 CHECK_NULL);
2472 }
2473 if (parsed_code_attribute) {
2474 classfile_parse_error("Multiple Code attributes in class file %s",
2475 CHECK_NULL);
2476 }
2477 parsed_code_attribute = true;
2478
2479 // Stack size, locals size, and code size
2480 if (_major_version == 45 && _minor_version <= 2) {
2481 cfs->guarantee_more(4, CHECK_NULL);
2482 max_stack = cfs->get_u1_fast();
2483 max_locals = cfs->get_u1_fast();
2484 code_length = cfs->get_u2_fast();
2485 } else {
2486 cfs->guarantee_more(8, CHECK_NULL);
2487 max_stack = cfs->get_u2_fast();
2488 max_locals = cfs->get_u2_fast();
2489 code_length = cfs->get_u4_fast();
2490 }
2491 if (_need_verify) {
2492 guarantee_property(args_size <= max_locals,
2493 "Arguments can't fit into locals in class file %s",
2494 CHECK_NULL);
2495 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2496 "Invalid method Code length %u in class file %s",
2497 code_length, CHECK_NULL);
2498 }
2499 // Code pointer
2500 code_start = cfs->current();
2501 assert(code_start != NULL, "null code start");
2502 cfs->guarantee_more(code_length, CHECK_NULL);
2503 cfs->skip_u1_fast(code_length);
2504
2505 // Exception handler table
2506 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2507 exception_table_length = cfs->get_u2_fast();
2508 if (exception_table_length > 0) {
2509 exception_table_start = parse_exception_table(cfs,
2510 code_length,
2511 exception_table_length,
2512 CHECK_NULL);
2513 }
2514
2515 // Parse additional attributes in code attribute
2516 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2517 u2 code_attributes_count = cfs->get_u2_fast();
2518
2519 unsigned int calculated_attribute_length = 0;
2520
2521 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2522 calculated_attribute_length =
2523 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2524 } else {
2525 // max_stack, locals and length are smaller in pre-version 45.2 classes
2526 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2527 }
2528 calculated_attribute_length +=
2529 code_length +
2530 sizeof(exception_table_length) +
2531 sizeof(code_attributes_count) +
2532 exception_table_length *
2533 ( sizeof(u2) + // start_pc
2534 sizeof(u2) + // end_pc
2535 sizeof(u2) + // handler_pc
2536 sizeof(u2) ); // catch_type_index
2537
2538 while (code_attributes_count--) {
2539 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2540 const u2 code_attribute_name_index = cfs->get_u2_fast();
2541 const u4 code_attribute_length = cfs->get_u4_fast();
2542 calculated_attribute_length += code_attribute_length +
2543 sizeof(code_attribute_name_index) +
2544 sizeof(code_attribute_length);
2545 check_property(valid_symbol_at(code_attribute_name_index),
2546 "Invalid code attribute name index %u in class file %s",
2547 code_attribute_name_index,
2548 CHECK_NULL);
2549 if (LoadLineNumberTables &&
2550 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2551 // Parse and compress line number table
2552 parse_linenumber_table(code_attribute_length,
2553 code_length,
2554 &linenumber_table,
2555 CHECK_NULL);
2556
2557 } else if (LoadLocalVariableTables &&
2558 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2559 // Parse local variable table
2560 if (!lvt_allocated) {
2561 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2562 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2563 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2564 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2565 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2566 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2567 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2568 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2569 lvt_allocated = true;
2570 }
2571 if (lvt_cnt == max_lvt_cnt) {
2572 max_lvt_cnt <<= 1;
2573 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2574 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2575 }
2576 localvariable_table_start[lvt_cnt] =
2577 parse_localvariable_table(cfs,
2578 code_length,
2579 max_locals,
2580 code_attribute_length,
2581 &localvariable_table_length[lvt_cnt],
2582 false, // is not LVTT
2583 CHECK_NULL);
2584 total_lvt_length += localvariable_table_length[lvt_cnt];
2585 lvt_cnt++;
2586 } else if (LoadLocalVariableTypeTables &&
2587 _major_version >= JAVA_1_5_VERSION &&
2588 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2589 if (!lvt_allocated) {
2590 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2591 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2592 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2593 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2594 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2595 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2596 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2597 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2598 lvt_allocated = true;
2599 }
2600 // Parse local variable type table
2601 if (lvtt_cnt == max_lvtt_cnt) {
2602 max_lvtt_cnt <<= 1;
2603 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2604 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2605 }
2606 localvariable_type_table_start[lvtt_cnt] =
2607 parse_localvariable_table(cfs,
2608 code_length,
2609 max_locals,
2610 code_attribute_length,
2611 &localvariable_type_table_length[lvtt_cnt],
2612 true, // is LVTT
2613 CHECK_NULL);
2614 lvtt_cnt++;
2615 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2616 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2617 // Stack map is only needed by the new verifier in JDK1.5.
2618 if (parsed_stackmap_attribute) {
2619 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2620 }
2621 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2622 stackmap_data_length = code_attribute_length;
2623 parsed_stackmap_attribute = true;
2624 } else {
2625 // Skip unknown attributes
2626 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2627 }
2628 }
2629 // check method attribute length
2630 if (_need_verify) {
2631 guarantee_property(method_attribute_length == calculated_attribute_length,
2632 "Code segment has wrong length in class file %s",
2633 CHECK_NULL);
2634 }
2635 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2636 // Parse Exceptions attribute
2637 if (parsed_checked_exceptions_attribute) {
2638 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2639 CHECK_NULL);
2640 }
2641 parsed_checked_exceptions_attribute = true;
2642 checked_exceptions_start =
2643 parse_checked_exceptions(cfs,
2644 &checked_exceptions_length,
2645 method_attribute_length,
2646 CHECK_NULL);
2647 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2648 // reject multiple method parameters
2649 if (method_parameters_seen) {
2650 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2651 CHECK_NULL);
2652 }
2653 method_parameters_seen = true;
2654 method_parameters_length = cfs->get_u1_fast();
2655 const u2 real_length = (method_parameters_length * 4u) + 1u;
2656 if (method_attribute_length != real_length) {
2657 classfile_parse_error(
2658 "Invalid MethodParameters method attribute length %u in class file",
2659 method_attribute_length, CHECK_NULL);
2660 }
2661 method_parameters_data = cfs->current();
2662 cfs->skip_u2_fast(method_parameters_length);
2663 cfs->skip_u2_fast(method_parameters_length);
2664 // ignore this attribute if it cannot be reflected
2665 if (!SystemDictionary::Parameter_klass_loaded())
2666 method_parameters_length = -1;
2667 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2668 if (method_attribute_length != 0) {
2669 classfile_parse_error(
2670 "Invalid Synthetic method attribute length %u in class file %s",
2671 method_attribute_length, CHECK_NULL);
2672 }
2673 // Should we check that there hasn't already been a synthetic attribute?
2674 access_flags.set_is_synthetic();
2675 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2676 if (method_attribute_length != 0) {
2677 classfile_parse_error(
2678 "Invalid Deprecated method attribute length %u in class file %s",
2679 method_attribute_length, CHECK_NULL);
2680 }
2681 } else if (_major_version >= JAVA_1_5_VERSION) {
2682 if (method_attribute_name == vmSymbols::tag_signature()) {
2683 if (generic_signature_index != 0) {
2684 classfile_parse_error(
2685 "Multiple Signature attributes for method in class file %s",
2686 CHECK_NULL);
2687 }
2688 if (method_attribute_length != 2) {
2689 classfile_parse_error(
2690 "Invalid Signature attribute length %u in class file %s",
2691 method_attribute_length, CHECK_NULL);
2692 }
2693 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2694 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2695 if (runtime_visible_annotations != NULL) {
2696 classfile_parse_error(
2697 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2698 CHECK_NULL);
2699 }
2700 runtime_visible_annotations_length = method_attribute_length;
2701 runtime_visible_annotations = cfs->current();
2702 assert(runtime_visible_annotations != NULL, "null visible annotations");
2703 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2704 parse_annotations(cp,
2705 runtime_visible_annotations,
2706 runtime_visible_annotations_length,
2707 &parsed_annotations,
2708 _loader_data,
2709 CHECK_NULL);
2710 cfs->skip_u1_fast(runtime_visible_annotations_length);
2711 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2712 if (runtime_invisible_annotations_exists) {
2713 classfile_parse_error(
2714 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2715 CHECK_NULL);
2716 }
2717 runtime_invisible_annotations_exists = true;
2718 if (PreserveAllAnnotations) {
2719 runtime_invisible_annotations_length = method_attribute_length;
2720 runtime_invisible_annotations = cfs->current();
2721 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2722 }
2723 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2724 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2725 if (runtime_visible_parameter_annotations != NULL) {
2726 classfile_parse_error(
2727 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2728 CHECK_NULL);
2729 }
2730 runtime_visible_parameter_annotations_length = method_attribute_length;
2731 runtime_visible_parameter_annotations = cfs->current();
2732 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2733 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2734 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2735 if (runtime_invisible_parameter_annotations_exists) {
2736 classfile_parse_error(
2737 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2738 CHECK_NULL);
2739 }
2740 runtime_invisible_parameter_annotations_exists = true;
2741 if (PreserveAllAnnotations) {
2742 runtime_invisible_parameter_annotations_length = method_attribute_length;
2743 runtime_invisible_parameter_annotations = cfs->current();
2744 assert(runtime_invisible_parameter_annotations != NULL,
2745 "null invisible parameter annotations");
2746 }
2747 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2748 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2749 if (annotation_default != NULL) {
2750 classfile_parse_error(
2751 "Multiple AnnotationDefault attributes for method in class file %s",
2752 CHECK_NULL);
2753 }
2754 annotation_default_length = method_attribute_length;
2755 annotation_default = cfs->current();
2756 assert(annotation_default != NULL, "null annotation default");
2757 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2758 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2759 if (runtime_visible_type_annotations != NULL) {
2760 classfile_parse_error(
2761 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2762 CHECK_NULL);
2763 }
2764 runtime_visible_type_annotations_length = method_attribute_length;
2765 runtime_visible_type_annotations = cfs->current();
2766 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2767 // No need for the VM to parse Type annotations
2768 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2769 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2770 if (runtime_invisible_type_annotations_exists) {
2771 classfile_parse_error(
2772 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2773 CHECK_NULL);
2774 } else {
2775 runtime_invisible_type_annotations_exists = true;
2776 }
2777 if (PreserveAllAnnotations) {
2778 runtime_invisible_type_annotations_length = method_attribute_length;
2779 runtime_invisible_type_annotations = cfs->current();
2780 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2781 }
2782 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2783 } else {
2784 // Skip unknown attributes
2785 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2786 }
2787 } else {
2788 // Skip unknown attributes
2789 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2790 }
2791 }
2792
2793 if (linenumber_table != NULL) {
2794 linenumber_table->write_terminator();
2795 linenumber_table_length = linenumber_table->position();
2796 }
2797
2798 // Make sure there's at least one Code attribute in non-native/non-abstract method
2799 if (_need_verify) {
2800 guarantee_property(access_flags.is_native() ||
2801 access_flags.is_abstract() ||
2802 parsed_code_attribute,
2803 "Absent Code attribute in method that is not native or abstract in class file %s",
2804 CHECK_NULL);
2805 }
2806
2807 // All sizing information for a Method* is finally available, now create it
2808 InlineTableSizes sizes(
2809 total_lvt_length,
2810 linenumber_table_length,
2811 exception_table_length,
2812 checked_exceptions_length,
2813 method_parameters_length,
2814 generic_signature_index,
2815 runtime_visible_annotations_length +
2816 runtime_invisible_annotations_length,
2817 runtime_visible_parameter_annotations_length +
2818 runtime_invisible_parameter_annotations_length,
2819 runtime_visible_type_annotations_length +
2820 runtime_invisible_type_annotations_length,
2821 annotation_default_length,
2822 0);
2823
2824 Method* const m = Method::allocate(_loader_data,
2825 code_length,
2826 access_flags,
2827 &sizes,
2828 ConstMethod::NORMAL,
2829 CHECK_NULL);
2830
2831 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2832
2833 // Fill in information from fixed part (access_flags already set)
2834 m->set_constants(_cp);
2835 m->set_name_index(name_index);
2836 m->set_signature_index(signature_index);
2837
2838 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2839 m->constMethod()->set_result_type(rtf.type());
2840
2841 if (args_size >= 0) {
2842 m->set_size_of_parameters(args_size);
2843 } else {
2844 m->compute_size_of_parameters(THREAD);
2845 }
2846 #ifdef ASSERT
2847 if (args_size >= 0) {
2848 m->compute_size_of_parameters(THREAD);
2849 assert(args_size == m->size_of_parameters(), "");
2850 }
2851 #endif
2852
2853 // Fill in code attribute information
2854 m->set_max_stack(max_stack);
2855 m->set_max_locals(max_locals);
2856 if (stackmap_data != NULL) {
2857 m->constMethod()->copy_stackmap_data(_loader_data,
2858 (u1*)stackmap_data,
2859 stackmap_data_length,
2860 CHECK_NULL);
2861 }
2862
2863 // Copy byte codes
2864 m->set_code((u1*)code_start);
2865
2866 // Copy line number table
2867 if (linenumber_table != NULL) {
2868 memcpy(m->compressed_linenumber_table(),
2869 linenumber_table->buffer(),
2870 linenumber_table_length);
2871 }
2872
2873 // Copy exception table
2874 if (exception_table_length > 0) {
2875 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2876 m->exception_table_start(),
2877 exception_table_length * sizeof(ExceptionTableElement),
2878 sizeof(u2));
2879 }
2880
2881 // Copy method parameters
2882 if (method_parameters_length > 0) {
2883 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2884 for (int i = 0; i < method_parameters_length; i++) {
2885 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2886 method_parameters_data += 2;
2887 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2888 method_parameters_data += 2;
2889 }
2890 }
2891
2892 // Copy checked exceptions
2893 if (checked_exceptions_length > 0) {
2894 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2895 m->checked_exceptions_start(),
2896 checked_exceptions_length * sizeof(CheckedExceptionElement),
2897 sizeof(u2));
2898 }
2899
2900 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2901 if (total_lvt_length > 0) {
2902 promoted_flags->set_has_localvariable_table();
2903 copy_localvariable_table(m->constMethod(),
2904 lvt_cnt,
2905 localvariable_table_length,
2906 localvariable_table_start,
2907 lvtt_cnt,
2908 localvariable_type_table_length,
2909 localvariable_type_table_start,
2910 CHECK_NULL);
2911 }
2912
2913 if (parsed_annotations.has_any_annotations())
2914 parsed_annotations.apply_to(m);
2915
2916 // Copy annotations
2917 copy_method_annotations(m->constMethod(),
2918 runtime_visible_annotations,
2919 runtime_visible_annotations_length,
2920 runtime_invisible_annotations,
2921 runtime_invisible_annotations_length,
2922 runtime_visible_parameter_annotations,
2923 runtime_visible_parameter_annotations_length,
2924 runtime_invisible_parameter_annotations,
2925 runtime_invisible_parameter_annotations_length,
2926 runtime_visible_type_annotations,
2927 runtime_visible_type_annotations_length,
2928 runtime_invisible_type_annotations,
2929 runtime_invisible_type_annotations_length,
2930 annotation_default,
2931 annotation_default_length,
2932 CHECK_NULL);
2933
2934 if (name == vmSymbols::finalize_method_name() &&
2935 signature == vmSymbols::void_method_signature()) {
2936 if (m->is_empty_method()) {
2937 _has_empty_finalizer = true;
2938 } else {
2939 _has_finalizer = true;
2940 }
2941 }
2942 if (name == vmSymbols::object_initializer_name() &&
2943 signature == vmSymbols::void_method_signature() &&
2944 m->is_vanilla_constructor()) {
2945 _has_vanilla_constructor = true;
2946 }
2947
2948 NOT_PRODUCT(m->verify());
2949 return m;
2950 }
2951
2952
2953 // The promoted_flags parameter is used to pass relevant access_flags
2954 // from the methods back up to the containing klass. These flag values
2955 // are added to klass's access_flags.
2956 // Side-effects: populates the _methods field in the parser
2957 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2958 bool is_interface,
2959 AccessFlags* promoted_flags,
2960 bool* has_final_method,
2961 bool* declares_nonstatic_concrete_methods,
2962 TRAPS) {
2963 assert(cfs != NULL, "invariant");
2964 assert(promoted_flags != NULL, "invariant");
2965 assert(has_final_method != NULL, "invariant");
2966 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2967
2968 assert(NULL == _methods, "invariant");
2969
2970 cfs->guarantee_more(2, CHECK); // length
2971 const u2 length = cfs->get_u2_fast();
2972 if (length == 0) {
2973 _methods = Universe::the_empty_method_array();
2974 } else {
2975 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2976 length,
2977 NULL,
2978 CHECK);
2979
2980 for (int index = 0; index < length; index++) {
2981 Method* method = parse_method(cfs,
2982 is_interface,
2983 _cp,
2984 promoted_flags,
2985 CHECK);
2986
2987 if (method->is_final()) {
2988 *has_final_method = true;
2989 }
2990 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2991 // used for interface initialization, and default method inheritance analysis
2992 if (is_interface && !(*declares_nonstatic_concrete_methods)
2993 && !method->is_abstract() && !method->is_static()) {
2994 *declares_nonstatic_concrete_methods = true;
2995 }
2996 _methods->at_put(index, method);
2997 }
2998
2999 if (_need_verify && length > 1) {
3000 // Check duplicated methods
3001 ResourceMark rm(THREAD);
3002 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3003 THREAD, NameSigHash*, HASH_ROW_SIZE);
3004 initialize_hashtable(names_and_sigs);
3005 bool dup = false;
3006 const Symbol* name = NULL;
3007 const Symbol* sig = NULL;
3008 {
3009 debug_only(NoSafepointVerifier nsv;)
3010 for (int i = 0; i < length; i++) {
3011 const Method* const m = _methods->at(i);
3012 name = m->name();
3013 sig = m->signature();
3014 // If no duplicates, add name/signature in hashtable names_and_sigs.
3015 if (!put_after_lookup(name, sig, names_and_sigs)) {
3016 dup = true;
3017 break;
3018 }
3019 }
3020 }
3021 if (dup) {
3022 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3023 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3024 }
3025 }
3026 }
3027 }
3028
3029 static const intArray* sort_methods(Array<Method*>* methods) {
3030 const int length = methods->length();
3031 // If JVMTI original method ordering or sharing is enabled we have to
3032 // remember the original class file ordering.
3033 // We temporarily use the vtable_index field in the Method* to store the
3034 // class file index, so we can read in after calling qsort.
3035 // Put the method ordering in the shared archive.
3036 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3037 for (int index = 0; index < length; index++) {
3038 Method* const m = methods->at(index);
3039 assert(!m->valid_vtable_index(), "vtable index should not be set");
3040 m->set_vtable_index(index);
3041 }
3042 }
3043 // Sort method array by ascending method name (for faster lookups & vtable construction)
3044 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3045 Method::sort_methods(methods);
3046
3047 intArray* method_ordering = NULL;
3048 // If JVMTI original method ordering or sharing is enabled construct int
3049 // array remembering the original ordering
3050 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3051 method_ordering = new intArray(length, length, -1);
3052 for (int index = 0; index < length; index++) {
3053 Method* const m = methods->at(index);
3054 const int old_index = m->vtable_index();
3055 assert(old_index >= 0 && old_index < length, "invalid method index");
3056 method_ordering->at_put(index, old_index);
3057 m->set_vtable_index(Method::invalid_vtable_index);
3058 }
3059 }
3060 return method_ordering;
3061 }
3062
3063 // Parse generic_signature attribute for methods and fields
3064 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3065 TRAPS) {
3066 assert(cfs != NULL, "invariant");
3067
3068 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3069 const u2 generic_signature_index = cfs->get_u2_fast();
3070 check_property(
3071 valid_symbol_at(generic_signature_index),
3072 "Invalid Signature attribute at constant pool index %u in class file %s",
3073 generic_signature_index, CHECK_0);
3074 return generic_signature_index;
3075 }
3076
3077 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3078 TRAPS) {
3079
3080 assert(cfs != NULL, "invariant");
3081
3082 cfs->guarantee_more(2, CHECK); // sourcefile_index
3083 const u2 sourcefile_index = cfs->get_u2_fast();
3084 check_property(
3085 valid_symbol_at(sourcefile_index),
3086 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3087 sourcefile_index, CHECK);
3088 set_class_sourcefile_index(sourcefile_index);
3089 }
3090
3091 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3092 int length,
3093 TRAPS) {
3094 assert(cfs != NULL, "invariant");
3095
3096 const u1* const sde_buffer = cfs->current();
3097 assert(sde_buffer != NULL, "null sde buffer");
3098
3099 // Don't bother storing it if there is no way to retrieve it
3100 if (JvmtiExport::can_get_source_debug_extension()) {
3101 assert((length+1) > length, "Overflow checking");
3102 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3103 for (int i = 0; i < length; i++) {
3104 sde[i] = sde_buffer[i];
3105 }
3106 sde[length] = '\0';
3107 set_class_sde_buffer((const char*)sde, length);
3108 }
3109 // Got utf8 string, set stream position forward
3110 cfs->skip_u1(length, CHECK);
3111 }
3112
3113
3114 // Inner classes can be static, private or protected (classic VM does this)
3115 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3116 JVM_ACC_PRIVATE | \
3117 JVM_ACC_PROTECTED | \
3118 JVM_ACC_STATIC \
3119 )
3120
3121 // Return number of classes in the inner classes attribute table
3122 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3123 const u1* const inner_classes_attribute_start,
3124 bool parsed_enclosingmethod_attribute,
3125 u2 enclosing_method_class_index,
3126 u2 enclosing_method_method_index,
3127 TRAPS) {
3128 const u1* const current_mark = cfs->current();
3129 u2 length = 0;
3130 if (inner_classes_attribute_start != NULL) {
3131 cfs->set_current(inner_classes_attribute_start);
3132 cfs->guarantee_more(2, CHECK_0); // length
3133 length = cfs->get_u2_fast();
3134 }
3135
3136 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3137 // method data:
3138 // [inner_class_info_index,
3139 // outer_class_info_index,
3140 // inner_name_index,
3141 // inner_class_access_flags,
3142 // ...
3143 // enclosing_method_class_index,
3144 // enclosing_method_method_index]
3145 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3146 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3147 _inner_classes = inner_classes;
3148
3149 int index = 0;
3150 const int cp_size = _cp->length();
3151 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3152 for (int n = 0; n < length; n++) {
3153 // Inner class index
3154 const u2 inner_class_info_index = cfs->get_u2_fast();
3155 check_property(
3156 (valid_klass_reference_at(inner_class_info_index) ||
3157 ((EnableValhalla || EnableMVT) && valid_value_type_reference_at(inner_class_info_index))),
3158 "inner_class_info_index %u has bad constant type in class file %s",
3159 inner_class_info_index, CHECK_0);
3160 // Outer class index
3161 const u2 outer_class_info_index = cfs->get_u2_fast();
3162 check_property(
3163 outer_class_info_index == 0 ||
3164 valid_klass_reference_at(outer_class_info_index),
3165 "outer_class_info_index %u has bad constant type in class file %s",
3166 outer_class_info_index, CHECK_0);
3167 // Inner class name
3168 const u2 inner_name_index = cfs->get_u2_fast();
3169 check_property(
3170 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3171 "inner_name_index %u has bad constant type in class file %s",
3172 inner_name_index, CHECK_0);
3173 if (_need_verify) {
3174 guarantee_property(inner_class_info_index != outer_class_info_index,
3175 "Class is both outer and inner class in class file %s", CHECK_0);
3176 }
3177
3178 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3179 // JVM_ACC_MODULE is defined in JDK-9 and later.
3180 if (_major_version >= JAVA_9_VERSION) {
3181 recognized_modifiers |= JVM_ACC_MODULE;
3182 }
3183 // JVM_ACC_VALUE is defined for class file version 53.1 and later
3184 if (supports_value_types()) {
3185 recognized_modifiers |= JVM_ACC_VALUE;
3186 }
3187
3188 // Access flags
3189 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3190
3191 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3192 // Set abstract bit for old class files for backward compatibility
3193 flags |= JVM_ACC_ABSTRACT;
3194 }
3195 verify_legal_class_modifiers(flags, CHECK_0);
3196 AccessFlags inner_access_flags(flags);
3197
3198 inner_classes->at_put(index++, inner_class_info_index);
3199 inner_classes->at_put(index++, outer_class_info_index);
3200 inner_classes->at_put(index++, inner_name_index);
3201 inner_classes->at_put(index++, inner_access_flags.as_short());
3202 }
3203
3204 // 4347400: make sure there's no duplicate entry in the classes array
3205 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3206 for(int i = 0; i < length * 4; i += 4) {
3207 for(int j = i + 4; j < length * 4; j += 4) {
3208 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3209 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3210 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3211 inner_classes->at(i+3) != inner_classes->at(j+3)),
3212 "Duplicate entry in InnerClasses in class file %s",
3213 CHECK_0);
3214 }
3215 }
3216 }
3217
3218 // Set EnclosingMethod class and method indexes.
3219 if (parsed_enclosingmethod_attribute) {
3220 inner_classes->at_put(index++, enclosing_method_class_index);
3221 inner_classes->at_put(index++, enclosing_method_method_index);
3222 }
3223 assert(index == size, "wrong size");
3224
3225 // Restore buffer's current position.
3226 cfs->set_current(current_mark);
3227
3228 return length;
3229 }
3230
3231 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3232 set_class_synthetic_flag(true);
3233 }
3234
3235 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3236 assert(cfs != NULL, "invariant");
3237
3238 const u2 signature_index = cfs->get_u2(CHECK);
3239 check_property(
3240 valid_symbol_at(signature_index),
3241 "Invalid constant pool index %u in Signature attribute in class file %s",
3242 signature_index, CHECK);
3243 set_class_generic_signature_index(signature_index);
3244 }
3245
3246 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3247 ConstantPool* cp,
3248 u4 attribute_byte_length,
3249 TRAPS) {
3250 assert(cfs != NULL, "invariant");
3251 assert(cp != NULL, "invariant");
3252
3253 const u1* const current_start = cfs->current();
3254
3255 guarantee_property(attribute_byte_length >= sizeof(u2),
3256 "Invalid BootstrapMethods attribute length %u in class file %s",
3257 attribute_byte_length,
3258 CHECK);
3259
3260 cfs->guarantee_more(attribute_byte_length, CHECK);
3261
3262 const int attribute_array_length = cfs->get_u2_fast();
3263
3264 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3265 "Short length on BootstrapMethods in class file %s",
3266 CHECK);
3267
3268
3269 // The attribute contains a counted array of counted tuples of shorts,
3270 // represending bootstrap specifiers:
3271 // length*{bootstrap_method_index, argument_count*{argument_index}}
3272 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3273 // operand_count = number of shorts in attr, except for leading length
3274
3275 // The attribute is copied into a short[] array.
3276 // The array begins with a series of short[2] pairs, one for each tuple.
3277 const int index_size = (attribute_array_length * 2);
3278
3279 Array<u2>* const operands =
3280 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3281
3282 // Eagerly assign operands so they will be deallocated with the constant
3283 // pool if there is an error.
3284 cp->set_operands(operands);
3285
3286 int operand_fill_index = index_size;
3287 const int cp_size = cp->length();
3288
3289 for (int n = 0; n < attribute_array_length; n++) {
3290 // Store a 32-bit offset into the header of the operand array.
3291 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3292
3293 // Read a bootstrap specifier.
3294 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3295 const u2 bootstrap_method_index = cfs->get_u2_fast();
3296 const u2 argument_count = cfs->get_u2_fast();
3297 check_property(
3298 valid_cp_range(bootstrap_method_index, cp_size) &&
3299 cp->tag_at(bootstrap_method_index).is_method_handle(),
3300 "bootstrap_method_index %u has bad constant type in class file %s",
3301 bootstrap_method_index,
3302 CHECK);
3303
3304 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3305 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3306 CHECK);
3307
3308 operands->at_put(operand_fill_index++, bootstrap_method_index);
3309 operands->at_put(operand_fill_index++, argument_count);
3310
3311 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3312 for (int j = 0; j < argument_count; j++) {
3313 const u2 argument_index = cfs->get_u2_fast();
3314 check_property(
3315 valid_cp_range(argument_index, cp_size) &&
3316 cp->tag_at(argument_index).is_loadable_constant(),
3317 "argument_index %u has bad constant type in class file %s",
3318 argument_index,
3319 CHECK);
3320 operands->at_put(operand_fill_index++, argument_index);
3321 }
3322 }
3323 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3324 "Bad length on BootstrapMethods in class file %s",
3325 CHECK);
3326 }
3327
3328 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3329 ConstantPool* cp,
3330 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3331 TRAPS) {
3332 assert(cfs != NULL, "invariant");
3333 assert(cp != NULL, "invariant");
3334 assert(parsed_annotations != NULL, "invariant");
3335
3336 // Set inner classes attribute to default sentinel
3337 _inner_classes = Universe::the_empty_short_array();
3338 cfs->guarantee_more(2, CHECK); // attributes_count
3339 u2 attributes_count = cfs->get_u2_fast();
3340 bool parsed_sourcefile_attribute = false;
3341 bool parsed_innerclasses_attribute = false;
3342 bool parsed_enclosingmethod_attribute = false;
3343 bool parsed_bootstrap_methods_attribute = false;
3344 const u1* runtime_visible_annotations = NULL;
3345 int runtime_visible_annotations_length = 0;
3346 const u1* runtime_invisible_annotations = NULL;
3347 int runtime_invisible_annotations_length = 0;
3348 const u1* runtime_visible_type_annotations = NULL;
3349 int runtime_visible_type_annotations_length = 0;
3350 const u1* runtime_invisible_type_annotations = NULL;
3351 int runtime_invisible_type_annotations_length = 0;
3352 bool runtime_invisible_type_annotations_exists = false;
3353 bool runtime_invisible_annotations_exists = false;
3354 bool parsed_source_debug_ext_annotations_exist = false;
3355 const u1* inner_classes_attribute_start = NULL;
3356 u4 inner_classes_attribute_length = 0;
3357 u2 enclosing_method_class_index = 0;
3358 u2 enclosing_method_method_index = 0;
3359 // Iterate over attributes
3360 while (attributes_count--) {
3361 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3362 const u2 attribute_name_index = cfs->get_u2_fast();
3363 const u4 attribute_length = cfs->get_u4_fast();
3364 check_property(
3365 valid_symbol_at(attribute_name_index),
3366 "Attribute name has bad constant pool index %u in class file %s",
3367 attribute_name_index, CHECK);
3368 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3369 if (tag == vmSymbols::tag_source_file()) {
3370 // Check for SourceFile tag
3371 if (_need_verify) {
3372 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3373 }
3374 if (parsed_sourcefile_attribute) {
3375 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3376 } else {
3377 parsed_sourcefile_attribute = true;
3378 }
3379 parse_classfile_sourcefile_attribute(cfs, CHECK);
3380 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3381 // Check for SourceDebugExtension tag
3382 if (parsed_source_debug_ext_annotations_exist) {
3383 classfile_parse_error(
3384 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3385 }
3386 parsed_source_debug_ext_annotations_exist = true;
3387 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3388 } else if (tag == vmSymbols::tag_inner_classes()) {
3389 // Check for InnerClasses tag
3390 if (parsed_innerclasses_attribute) {
3391 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3392 } else {
3393 parsed_innerclasses_attribute = true;
3394 }
3395 inner_classes_attribute_start = cfs->current();
3396 inner_classes_attribute_length = attribute_length;
3397 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3398 } else if (tag == vmSymbols::tag_synthetic()) {
3399 // Check for Synthetic tag
3400 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3401 if (attribute_length != 0) {
3402 classfile_parse_error(
3403 "Invalid Synthetic classfile attribute length %u in class file %s",
3404 attribute_length, CHECK);
3405 }
3406 parse_classfile_synthetic_attribute(CHECK);
3407 } else if (tag == vmSymbols::tag_deprecated()) {
3408 // Check for Deprecatd tag - 4276120
3409 if (attribute_length != 0) {
3410 classfile_parse_error(
3411 "Invalid Deprecated classfile attribute length %u in class file %s",
3412 attribute_length, CHECK);
3413 }
3414 } else if (_major_version >= JAVA_1_5_VERSION) {
3415 if (tag == vmSymbols::tag_signature()) {
3416 if (_generic_signature_index != 0) {
3417 classfile_parse_error(
3418 "Multiple Signature attributes in class file %s", CHECK);
3419 }
3420 if (attribute_length != 2) {
3421 classfile_parse_error(
3422 "Wrong Signature attribute length %u in class file %s",
3423 attribute_length, CHECK);
3424 }
3425 parse_classfile_signature_attribute(cfs, CHECK);
3426 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3427 if (runtime_visible_annotations != NULL) {
3428 classfile_parse_error(
3429 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3430 }
3431 runtime_visible_annotations_length = attribute_length;
3432 runtime_visible_annotations = cfs->current();
3433 assert(runtime_visible_annotations != NULL, "null visible annotations");
3434 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3435 parse_annotations(cp,
3436 runtime_visible_annotations,
3437 runtime_visible_annotations_length,
3438 parsed_annotations,
3439 _loader_data,
3440 CHECK);
3441 cfs->skip_u1_fast(runtime_visible_annotations_length);
3442 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3443 if (runtime_invisible_annotations_exists) {
3444 classfile_parse_error(
3445 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3446 }
3447 runtime_invisible_annotations_exists = true;
3448 if (PreserveAllAnnotations) {
3449 runtime_invisible_annotations_length = attribute_length;
3450 runtime_invisible_annotations = cfs->current();
3451 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3452 }
3453 cfs->skip_u1(attribute_length, CHECK);
3454 } else if (tag == vmSymbols::tag_enclosing_method()) {
3455 if (parsed_enclosingmethod_attribute) {
3456 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3457 } else {
3458 parsed_enclosingmethod_attribute = true;
3459 }
3460 guarantee_property(attribute_length == 4,
3461 "Wrong EnclosingMethod attribute length %u in class file %s",
3462 attribute_length, CHECK);
3463 cfs->guarantee_more(4, CHECK); // class_index, method_index
3464 enclosing_method_class_index = cfs->get_u2_fast();
3465 enclosing_method_method_index = cfs->get_u2_fast();
3466 if (enclosing_method_class_index == 0) {
3467 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3468 }
3469 // Validate the constant pool indices and types
3470 check_property(valid_klass_reference_at(enclosing_method_class_index),
3471 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3472 if (enclosing_method_method_index != 0 &&
3473 (!cp->is_within_bounds(enclosing_method_method_index) ||
3474 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3475 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3476 }
3477 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3478 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3479 if (parsed_bootstrap_methods_attribute) {
3480 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3481 }
3482 parsed_bootstrap_methods_attribute = true;
3483 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3484 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3485 if (runtime_visible_type_annotations != NULL) {
3486 classfile_parse_error(
3487 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3488 }
3489 runtime_visible_type_annotations_length = attribute_length;
3490 runtime_visible_type_annotations = cfs->current();
3491 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3492 // No need for the VM to parse Type annotations
3493 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3494 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3495 if (runtime_invisible_type_annotations_exists) {
3496 classfile_parse_error(
3497 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3498 } else {
3499 runtime_invisible_type_annotations_exists = true;
3500 }
3501 if (PreserveAllAnnotations) {
3502 runtime_invisible_type_annotations_length = attribute_length;
3503 runtime_invisible_type_annotations = cfs->current();
3504 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3505 }
3506 cfs->skip_u1(attribute_length, CHECK);
3507 } else {
3508 // Unknown attribute
3509 cfs->skip_u1(attribute_length, CHECK);
3510 }
3511 } else {
3512 // Unknown attribute
3513 cfs->skip_u1(attribute_length, CHECK);
3514 }
3515 }
3516 _annotations = assemble_annotations(runtime_visible_annotations,
3517 runtime_visible_annotations_length,
3518 runtime_invisible_annotations,
3519 runtime_invisible_annotations_length,
3520 CHECK);
3521 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3522 runtime_visible_type_annotations_length,
3523 runtime_invisible_type_annotations,
3524 runtime_invisible_type_annotations_length,
3525 CHECK);
3526
3527 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3528 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3529 cfs,
3530 inner_classes_attribute_start,
3531 parsed_innerclasses_attribute,
3532 enclosing_method_class_index,
3533 enclosing_method_method_index,
3534 CHECK);
3535 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3536 guarantee_property(
3537 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3538 "Wrong InnerClasses attribute length in class file %s", CHECK);
3539 }
3540 }
3541
3542 if (_max_bootstrap_specifier_index >= 0) {
3543 guarantee_property(parsed_bootstrap_methods_attribute,
3544 "Missing BootstrapMethods attribute in class file %s", CHECK);
3545 }
3546 }
3547
3548 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3549 assert(k != NULL, "invariant");
3550
3551 if (_synthetic_flag)
3552 k->set_is_synthetic();
3553 if (_sourcefile_index != 0) {
3554 k->set_source_file_name_index(_sourcefile_index);
3555 }
3556 if (_generic_signature_index != 0) {
3557 k->set_generic_signature_index(_generic_signature_index);
3558 }
3559 if (_sde_buffer != NULL) {
3560 k->set_source_debug_extension(_sde_buffer, _sde_length);
3561 }
3562 }
3563
3564 // Create the Annotations object that will
3565 // hold the annotations array for the Klass.
3566 void ClassFileParser::create_combined_annotations(TRAPS) {
3567 if (_annotations == NULL &&
3568 _type_annotations == NULL &&
3569 _fields_annotations == NULL &&
3570 _fields_type_annotations == NULL) {
3571 // Don't create the Annotations object unnecessarily.
3572 return;
3573 }
3574
3575 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3576 annotations->set_class_annotations(_annotations);
3577 annotations->set_class_type_annotations(_type_annotations);
3578 annotations->set_fields_annotations(_fields_annotations);
3579 annotations->set_fields_type_annotations(_fields_type_annotations);
3580
3581 // This is the Annotations object that will be
3582 // assigned to InstanceKlass being constructed.
3583 _combined_annotations = annotations;
3584
3585 // The annotations arrays below has been transfered the
3586 // _combined_annotations so these fields can now be cleared.
3587 _annotations = NULL;
3588 _type_annotations = NULL;
3589 _fields_annotations = NULL;
3590 _fields_type_annotations = NULL;
3591 }
3592
3593 // Transfer ownership of metadata allocated to the InstanceKlass.
3594 void ClassFileParser::apply_parsed_class_metadata(
3595 InstanceKlass* this_klass,
3596 int java_fields_count, TRAPS) {
3597 assert(this_klass != NULL, "invariant");
3598
3599 _cp->set_pool_holder(this_klass);
3600 this_klass->set_constants(_cp);
3601 this_klass->set_fields(_fields, java_fields_count);
3602 this_klass->set_methods(_methods);
3603 this_klass->set_inner_classes(_inner_classes);
3604 this_klass->set_local_interfaces(_local_interfaces);
3605 this_klass->set_transitive_interfaces(_transitive_interfaces);
3606 this_klass->set_annotations(_combined_annotations);
3607
3608 // Clear out these fields so they don't get deallocated by the destructor
3609 clear_class_metadata();
3610 }
3611
3612 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3613 int runtime_visible_annotations_length,
3614 const u1* const runtime_invisible_annotations,
3615 int runtime_invisible_annotations_length,
3616 TRAPS) {
3617 AnnotationArray* annotations = NULL;
3618 if (runtime_visible_annotations != NULL ||
3619 runtime_invisible_annotations != NULL) {
3620 annotations = MetadataFactory::new_array<u1>(_loader_data,
3621 runtime_visible_annotations_length +
3622 runtime_invisible_annotations_length,
3623 CHECK_(annotations));
3624 if (runtime_visible_annotations != NULL) {
3625 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3626 annotations->at_put(i, runtime_visible_annotations[i]);
3627 }
3628 }
3629 if (runtime_invisible_annotations != NULL) {
3630 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3631 int append = runtime_visible_annotations_length+i;
3632 annotations->at_put(append, runtime_invisible_annotations[i]);
3633 }
3634 }
3635 }
3636 return annotations;
3637 }
3638
3639 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3640 const int super_class_index,
3641 const bool need_verify,
3642 TRAPS) {
3643 assert(cp != NULL, "invariant");
3644 const InstanceKlass* super_klass = NULL;
3645
3646 if (super_class_index == 0) {
3647 check_property(_class_name == vmSymbols::java_lang_Object()
3648 || (_access_flags.get_flags() & JVM_ACC_VALUE),
3649 "Invalid superclass index %u in class file %s",
3650 super_class_index,
3651 CHECK_NULL);
3652 } else {
3653 check_property((valid_klass_reference_at(super_class_index) ||
3654 ((EnableValhalla || EnableMVT) && valid_value_type_reference_at(super_class_index))),
3655 "Invalid superclass index %u in class file %s",
3656 super_class_index,
3657 CHECK_NULL);
3658 // The class name should be legal because it is checked when parsing constant pool.
3659 // However, make sure it is not an array type.
3660 bool is_array = false;
3661 if (cp->tag_at(super_class_index).is_klass() || cp->tag_at(super_class_index).is_value_type()) {
3662 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3663 if (need_verify)
3664 is_array = super_klass->is_array_klass();
3665 } else if (need_verify) {
3666 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3667 }
3668 if (need_verify) {
3669 guarantee_property(!is_array,
3670 "Bad superclass name in class file %s", CHECK_NULL);
3671 }
3672 }
3673 return super_klass;
3674 }
3675
3676 #ifndef PRODUCT
3677 static void print_field_layout(const Symbol* name,
3678 Array<u2>* fields,
3679 const constantPoolHandle& cp,
3680 int instance_size,
3681 int instance_fields_start,
3682 int instance_fields_end,
3683 int static_fields_end) {
3684
3685 assert(name != NULL, "invariant");
3686
3687 tty->print("%s: field layout\n", name->as_klass_external_name());
3688 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3689 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3690 if (!fs.access_flags().is_static()) {
3691 tty->print(" @%3d \"%s\" %s\n",
3692 fs.offset(),
3693 fs.name()->as_klass_external_name(),
3694 fs.signature()->as_klass_external_name());
3695 }
3696 }
3697 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3698 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3699 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3700 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3701 if (fs.access_flags().is_static()) {
3702 tty->print(" @%3d \"%s\" %s\n",
3703 fs.offset(),
3704 fs.name()->as_klass_external_name(),
3705 fs.signature()->as_klass_external_name());
3706 }
3707 }
3708 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3709 tty->print("\n");
3710 }
3711 #endif
3712
3713 // Values needed for oopmap and InstanceKlass creation
3714 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3715 public:
3716 OopMapBlocksBuilder* oop_map_blocks;
3717 int instance_size;
3718 int nonstatic_field_size;
3719 int static_field_size;
3720 bool has_nonstatic_fields;
3721 };
3722
3723 // Utility to collect and compact oop maps during layout
3724 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj {
3725 public:
3726 OopMapBlock* nonstatic_oop_maps;
3727 unsigned int nonstatic_oop_map_count;
3728 unsigned int max_nonstatic_oop_maps;
3729
3730 public:
3731 OopMapBlocksBuilder(unsigned int max_blocks, TRAPS) {
3732 max_nonstatic_oop_maps = max_blocks;
3733 nonstatic_oop_map_count = 0;
3734 if (max_blocks == 0) {
3735 nonstatic_oop_maps = NULL;
3736 } else {
3737 nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD(
3738 THREAD, OopMapBlock, max_nonstatic_oop_maps);
3739 memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3740 }
3741 }
3742
3743 OopMapBlock* last_oop_map() const {
3744 assert(nonstatic_oop_map_count > 0, "Has no oop maps");
3745 return nonstatic_oop_maps + (nonstatic_oop_map_count - 1);
3746 }
3747
3748 // addition of super oop maps
3749 void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3750 assert(nof_blocks && nonstatic_oop_map_count == 0 &&
3751 nof_blocks <= max_nonstatic_oop_maps, "invariant");
3752
3753 memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3754 nonstatic_oop_map_count += nof_blocks;
3755 }
3756
3757 // collection of oops
3758 void add(int offset, int count) {
3759 if (nonstatic_oop_map_count == 0) {
3760 nonstatic_oop_map_count++;
3761 }
3762 OopMapBlock* nonstatic_oop_map = last_oop_map();
3763 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3764 nonstatic_oop_map->set_offset(offset);
3765 nonstatic_oop_map->set_count(count);
3766 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3767 nonstatic_oop_map->increment_count(count);
3768 } else { // Need a new one...
3769 nonstatic_oop_map_count++;
3770 assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check");
3771 nonstatic_oop_map = last_oop_map();
3772 nonstatic_oop_map->set_offset(offset);
3773 nonstatic_oop_map->set_count(count);
3774 }
3775 }
3776
3777 // general purpose copy, e.g. into allocated instanceKlass
3778 void copy(OopMapBlock* dst) {
3779 if (nonstatic_oop_map_count != 0) {
3780 memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count);
3781 }
3782 }
3783
3784 // Sort and compact adjacent blocks
3785 void compact(TRAPS) {
3786 if (nonstatic_oop_map_count <= 1) {
3787 return;
3788 }
3789 /*
3790 * Since field layout sneeks in oops before values, we will be able to condense
3791 * blocks. There is potential to compact between super, own refs and values
3792 * containing refs.
3793 *
3794 * Currently compaction is slightly limited due to values being 8 byte aligned.
3795 * This may well change: FixMe if doesn't, the code below is fairly general purpose
3796 * and maybe it doesn't need to be.
3797 */
3798 qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock),
3799 (_sort_Fn)OopMapBlock::compare_offset);
3800 if (nonstatic_oop_map_count < 2) {
3801 return;
3802 }
3803
3804 //Make a temp copy, and iterate through and copy back into the orig
3805 ResourceMark rm(THREAD);
3806 OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock,
3807 nonstatic_oop_map_count);
3808 OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count;
3809 copy(oop_maps_copy);
3810 OopMapBlock* nonstatic_oop_map = nonstatic_oop_maps;
3811 unsigned int new_count = 1;
3812 oop_maps_copy++;
3813 while(oop_maps_copy < oop_maps_copy_end) {
3814 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3815 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3816 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3817 } else {
3818 nonstatic_oop_map++;
3819 new_count++;
3820 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3821 nonstatic_oop_map->set_count(oop_maps_copy->count());
3822 }
3823 oop_maps_copy++;
3824 }
3825 assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?");
3826 nonstatic_oop_map_count = new_count;
3827 }
3828
3829 void print_on(outputStream* st) const {
3830 st->print_cr(" OopMapBlocks: %3d /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps);
3831 if (nonstatic_oop_map_count > 0) {
3832 OopMapBlock* map = nonstatic_oop_maps;
3833 OopMapBlock* last_map = last_oop_map();
3834 assert(map <= last_map, "Last less than first");
3835 while (map <= last_map) {
3836 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3837 map->offset() + map->offset_span() - heapOopSize, map->count());
3838 map++;
3839 }
3840 }
3841 }
3842
3843 void print_value_on(outputStream* st) const {
3844 print_on(st);
3845 }
3846
3847 };
3848
3849 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
3850 const char* msg,
3851 const Symbol* name,
3852 const Symbol* sig) const {
3853
3854 ResourceMark rm(THREAD);
3855 if (name == NULL || sig == NULL) {
3856 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3857 vmSymbols::java_lang_ClassFormatError(),
3858 "class: %s - %s", _class_name->as_C_string(), msg);
3859 }
3860 else {
3861 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3862 vmSymbols::java_lang_ClassFormatError(),
3863 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
3864 _class_name->as_C_string(), msg);
3865 }
3866 }
3867
3868 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3869 void ClassFileParser::layout_fields(ConstantPool* cp,
3870 const FieldAllocationCount* fac,
3871 const ClassAnnotationCollector* parsed_annotations,
3872 FieldLayoutInfo* info,
3873 TRAPS) {
3874
3875 assert(cp != NULL, "invariant");
3876
3877 // Field size and offset computation
3878 int nonstatic_field_size = _super_klass == NULL ? 0 :
3879 _super_klass->nonstatic_field_size();
3880 int next_nonstatic_valuetype_offset = 0;
3881 int first_nonstatic_valuetype_offset = 0;
3882
3883 // Fields that are value types are handled differently depending if they are static or not:
3884 // - static fields are oops
3885 // - non-static fields are embedded
3886
3887 // Count the contended fields by type.
3888 //
3889 // We ignore static fields, because @Contended is not supported for them.
3890 // The layout code below will also ignore the static fields.
3891 int nonstatic_contended_count = 0;
3892 FieldAllocationCount fac_contended;
3893 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3894 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3895 if (fs.is_contended()) {
3896 fac_contended.count[atype]++;
3897 if (!fs.access_flags().is_static()) {
3898 nonstatic_contended_count++;
3899 }
3900 }
3901 }
3902
3903
3904 // Calculate the starting byte offsets
3905 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3906 // Value types in static fields are nor embedded, they are handled with oops
3907 int next_static_double_offset = next_static_oop_offset +
3908 ((fac->count[STATIC_OOP] + fac->count[STATIC_VALUETYPE]) * heapOopSize);
3909 if ( fac->count[STATIC_DOUBLE] &&
3910 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3911 Universe::field_type_should_be_aligned(T_LONG)) ) {
3912 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3913 }
3914
3915 int next_static_word_offset = next_static_double_offset +
3916 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3917 int next_static_short_offset = next_static_word_offset +
3918 ((fac->count[STATIC_WORD]) * BytesPerInt);
3919 int next_static_byte_offset = next_static_short_offset +
3920 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3921
3922 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3923 nonstatic_field_size * heapOopSize;
3924
3925 // First field of value types is aligned on a long boundary in order to ease
3926 // in-lining of value types (with header removal) in packed arrays and
3927 // flatten value types
3928 int initial_value_type_padding = 0;
3929 if (is_value_type() || is_value_capable_class()) {
3930 int old = nonstatic_fields_start;
3931 nonstatic_fields_start = align_up(nonstatic_fields_start, BytesPerLong);
3932 initial_value_type_padding = nonstatic_fields_start - old;
3933 }
3934
3935 int next_nonstatic_field_offset = nonstatic_fields_start;
3936
3937 const bool is_contended_class = parsed_annotations->is_contended();
3938
3939 // Class is contended, pad before all the fields
3940 if (is_contended_class) {
3941 next_nonstatic_field_offset += ContendedPaddingWidth;
3942 }
3943
3944 // Temporary value types restrictions
3945 if (is_value_type() || is_value_capable_class()) {
3946 if (is_contended_class) {
3947 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
3948 return;
3949 }
3950 }
3951
3952 // Compute the non-contended fields count.
3953 // The packing code below relies on these counts to determine if some field
3954 // can be squeezed into the alignment gap. Contended fields are obviously
3955 // exempt from that.
3956 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3957 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3958 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3959 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3960 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3961
3962 int static_value_type_count = 0;
3963 int nonstatic_value_type_count = 0;
3964 int* nonstatic_value_type_indexes = NULL;
3965 Klass** nonstatic_value_type_klasses = NULL;
3966 unsigned int value_type_oop_map_count = 0;
3967
3968 int max_nonstatic_value_type = fac->count[NONSTATIC_VALUETYPE] + 1;
3969
3970 nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int,
3971 max_nonstatic_value_type);
3972 for (int i = 0; i < max_nonstatic_value_type; i++) {
3973 nonstatic_value_type_indexes[i] = -1;
3974 }
3975 nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*,
3976 max_nonstatic_value_type);
3977
3978 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3979 if (fs.allocation_type() == STATIC_VALUETYPE) {
3980 static_value_type_count++;
3981 } else if (fs.allocation_type() == NONSTATIC_VALUETYPE) {
3982 Symbol* signature = fs.signature();
3983 Klass* klass = SystemDictionary::resolve_or_fail(signature,
3984 Handle(THREAD, _loader_data->class_loader()),
3985 _protection_domain, true, CHECK);
3986 assert(klass != NULL, "Sanity check");
3987 assert(klass->access_flags().is_value_type(), "Value type expected");
3988 nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index();
3989 nonstatic_value_type_klasses[nonstatic_value_type_count] = klass;
3990 nonstatic_value_type_count++;
3991
3992 ValueKlass* vklass = ValueKlass::cast(klass);
3993 if (vklass->contains_oops()) {
3994 value_type_oop_map_count += vklass->nonstatic_oop_map_count();
3995 }
3996 }
3997 }
3998
3999 // Total non-static fields count, including every contended field
4000 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
4001 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
4002 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_VALUETYPE];
4003
4004 const bool super_has_nonstatic_fields =
4005 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4006 const bool has_nonstatic_fields =
4007 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4008 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
4009
4010 if (is_value_type() && (!has_nonstatic_fields)) {
4011 // There are a number of fixes required throughout the type system and JIT
4012 if (class_name() != vmSymbols::java_lang____Value()) {
4013 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support zero instance size yet");
4014 }
4015 }
4016
4017 // Prepare list of oops for oop map generation.
4018 //
4019 // "offset" and "count" lists are describing the set of contiguous oop
4020 // regions. offset[i] is the start of the i-th region, which then has
4021 // count[i] oops following. Before we know how many regions are required,
4022 // we pessimistically allocate the maps to fit all the oops into the
4023 // distinct regions.
4024 //
4025 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
4026 int max_oop_map_count =
4027 super_oop_map_count +
4028 fac->count[NONSTATIC_OOP] +
4029 value_type_oop_map_count;
4030
4031 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD);
4032 if (super_oop_map_count > 0) {
4033 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
4034 _super_klass->nonstatic_oop_map_count());
4035 }
4036
4037 int first_nonstatic_oop_offset = 0; // will be set for first oop field
4038
4039 bool compact_fields = CompactFields;
4040 int allocation_style = FieldsAllocationStyle;
4041 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4042 assert(false, "0 <= FieldsAllocationStyle <= 2");
4043 allocation_style = 1; // Optimistic
4044 }
4045
4046 // The next classes have predefined hard-coded fields offsets
4047 // (see in JavaClasses::compute_hard_coded_offsets()).
4048 // Use default fields allocation order for them.
4049 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4050 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4051 _class_name == vmSymbols::java_lang_Class() ||
4052 _class_name == vmSymbols::java_lang_ClassLoader() ||
4053 _class_name == vmSymbols::java_lang_ref_Reference() ||
4054 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4055 _class_name == vmSymbols::java_lang_StackTraceElement() ||
4056 _class_name == vmSymbols::java_lang_String() ||
4057 _class_name == vmSymbols::java_lang_Throwable() ||
4058 _class_name == vmSymbols::java_lang_Boolean() ||
4059 _class_name == vmSymbols::java_lang_Character() ||
4060 _class_name == vmSymbols::java_lang_Float() ||
4061 _class_name == vmSymbols::java_lang_Double() ||
4062 _class_name == vmSymbols::java_lang_Byte() ||
4063 _class_name == vmSymbols::java_lang_Short() ||
4064 _class_name == vmSymbols::java_lang_Integer() ||
4065 _class_name == vmSymbols::java_lang_Long())) {
4066 allocation_style = 0; // Allocate oops first
4067 compact_fields = false; // Don't compact fields
4068 }
4069
4070 int next_nonstatic_oop_offset = 0;
4071 int next_nonstatic_double_offset = 0;
4072
4073 // Rearrange fields for a given allocation style
4074 if( allocation_style == 0 ) {
4075 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4076 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4077 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4078 (nonstatic_oop_count * heapOopSize);
4079 } else if( allocation_style == 1 ) {
4080 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4081 next_nonstatic_double_offset = next_nonstatic_field_offset;
4082 } else if( allocation_style == 2 ) {
4083 // Fields allocation: oops fields in super and sub classes are together.
4084 if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) {
4085 if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) {
4086 allocation_style = 0; // allocate oops first
4087 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4088 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4089 (nonstatic_oop_count * heapOopSize);
4090 }
4091 }
4092 if( allocation_style == 2 ) {
4093 allocation_style = 1; // allocate oops last
4094 next_nonstatic_double_offset = next_nonstatic_field_offset;
4095 }
4096 } else {
4097 ShouldNotReachHere();
4098 }
4099
4100 int nonstatic_oop_space_count = 0;
4101 int nonstatic_word_space_count = 0;
4102 int nonstatic_short_space_count = 0;
4103 int nonstatic_byte_space_count = 0;
4104 int nonstatic_oop_space_offset = 0;
4105 int nonstatic_word_space_offset = 0;
4106 int nonstatic_short_space_offset = 0;
4107 int nonstatic_byte_space_offset = 0;
4108
4109 // Try to squeeze some of the fields into the gaps due to
4110 // long/double alignment.
4111 if (nonstatic_double_count > 0) {
4112 int offset = next_nonstatic_double_offset;
4113 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4114 if (compact_fields && offset != next_nonstatic_double_offset) {
4115 // Allocate available fields into the gap before double field.
4116 int length = next_nonstatic_double_offset - offset;
4117 assert(length == BytesPerInt, "");
4118 nonstatic_word_space_offset = offset;
4119 if (nonstatic_word_count > 0) {
4120 nonstatic_word_count -= 1;
4121 nonstatic_word_space_count = 1; // Only one will fit
4122 length -= BytesPerInt;
4123 offset += BytesPerInt;
4124 }
4125 nonstatic_short_space_offset = offset;
4126 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4127 nonstatic_short_count -= 1;
4128 nonstatic_short_space_count += 1;
4129 length -= BytesPerShort;
4130 offset += BytesPerShort;
4131 }
4132 nonstatic_byte_space_offset = offset;
4133 while (length > 0 && nonstatic_byte_count > 0) {
4134 nonstatic_byte_count -= 1;
4135 nonstatic_byte_space_count += 1;
4136 length -= 1;
4137 }
4138 // Allocate oop field in the gap if there are no other fields for that.
4139 nonstatic_oop_space_offset = offset;
4140 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4141 allocation_style != 0) { // when oop fields not first
4142 nonstatic_oop_count -= 1;
4143 nonstatic_oop_space_count = 1; // Only one will fit
4144 length -= heapOopSize;
4145 offset += heapOopSize;
4146 }
4147 }
4148 }
4149
4150 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4151 (nonstatic_double_count * BytesPerLong);
4152 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4153 (nonstatic_word_count * BytesPerInt);
4154 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4155 (nonstatic_short_count * BytesPerShort);
4156 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4157 nonstatic_byte_count;
4158
4159 // let oops jump before padding with this allocation style
4160 if( allocation_style == 1 ) {
4161 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4162 if( nonstatic_oop_count > 0 ) {
4163 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4164 }
4165 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4166 }
4167
4168 // Aligning embedded value types
4169 // bug below, the current algorithm to layout embedded value types always put them at the
4170 // end of the layout, which doesn't match the different allocation policies the VM is
4171 // supposed to provide => FixMe
4172 // Note also that the current alignment policy is to make each value type starting on a
4173 // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4174 // align value types according to their most constrained internal type.
4175 next_nonstatic_valuetype_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4176 int next_value_type_index = 0;
4177
4178 // Iterate over fields again and compute correct offsets.
4179 // The field allocation type was temporarily stored in the offset slot.
4180 // oop fields are located before non-oop fields (static and non-static).
4181 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4182
4183 // skip already laid out fields
4184 if (fs.is_offset_set()) continue;
4185
4186 // contended instance fields are handled below
4187 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4188
4189 int real_offset = 0;
4190 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4191
4192 // pack the rest of the fields
4193 switch (atype) {
4194 // Value types in static fields are handled with oops
4195 case STATIC_VALUETYPE: // Fallthrough
4196 case STATIC_OOP:
4197 real_offset = next_static_oop_offset;
4198 next_static_oop_offset += heapOopSize;
4199 break;
4200 case STATIC_BYTE:
4201 real_offset = next_static_byte_offset;
4202 next_static_byte_offset += 1;
4203 break;
4204 case STATIC_SHORT:
4205 real_offset = next_static_short_offset;
4206 next_static_short_offset += BytesPerShort;
4207 break;
4208 case STATIC_WORD:
4209 real_offset = next_static_word_offset;
4210 next_static_word_offset += BytesPerInt;
4211 break;
4212 case STATIC_DOUBLE:
4213 real_offset = next_static_double_offset;
4214 next_static_double_offset += BytesPerLong;
4215 break;
4216 case NONSTATIC_VALUETYPE:
4217 {
4218 Klass* klass = nonstatic_value_type_klasses[next_value_type_index];
4219 assert(klass != NULL, "Klass should have been loaded and resolved earlier");
4220 assert(klass->access_flags().is_value_type(),"Must be a value type");
4221 ValueKlass* vklass = ValueKlass::cast(klass);
4222 real_offset = next_nonstatic_valuetype_offset;
4223 next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset();
4224 // aligning next value type on a 64 bits boundary
4225 next_nonstatic_valuetype_offset = align_up(next_nonstatic_valuetype_offset, BytesPerLong);
4226 next_value_type_index += 1;
4227
4228 if (vklass->contains_oops()) { // add flatten oop maps
4229 int diff = real_offset - vklass->first_field_offset();
4230 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4231 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4232 while (map < last_map) {
4233 nonstatic_oop_maps->add(map->offset() + diff, map->count());
4234 map++;
4235 }
4236 }
4237 }
4238 break;
4239 case NONSTATIC_OOP:
4240 if( nonstatic_oop_space_count > 0 ) {
4241 real_offset = nonstatic_oop_space_offset;
4242 nonstatic_oop_space_offset += heapOopSize;
4243 nonstatic_oop_space_count -= 1;
4244 } else {
4245 real_offset = next_nonstatic_oop_offset;
4246 next_nonstatic_oop_offset += heapOopSize;
4247 }
4248 nonstatic_oop_maps->add(real_offset, 1);
4249 break;
4250 case NONSTATIC_BYTE:
4251 if( nonstatic_byte_space_count > 0 ) {
4252 real_offset = nonstatic_byte_space_offset;
4253 nonstatic_byte_space_offset += 1;
4254 nonstatic_byte_space_count -= 1;
4255 } else {
4256 real_offset = next_nonstatic_byte_offset;
4257 next_nonstatic_byte_offset += 1;
4258 }
4259 break;
4260 case NONSTATIC_SHORT:
4261 if( nonstatic_short_space_count > 0 ) {
4262 real_offset = nonstatic_short_space_offset;
4263 nonstatic_short_space_offset += BytesPerShort;
4264 nonstatic_short_space_count -= 1;
4265 } else {
4266 real_offset = next_nonstatic_short_offset;
4267 next_nonstatic_short_offset += BytesPerShort;
4268 }
4269 break;
4270 case NONSTATIC_WORD:
4271 if( nonstatic_word_space_count > 0 ) {
4272 real_offset = nonstatic_word_space_offset;
4273 nonstatic_word_space_offset += BytesPerInt;
4274 nonstatic_word_space_count -= 1;
4275 } else {
4276 real_offset = next_nonstatic_word_offset;
4277 next_nonstatic_word_offset += BytesPerInt;
4278 }
4279 break;
4280 case NONSTATIC_DOUBLE:
4281 real_offset = next_nonstatic_double_offset;
4282 next_nonstatic_double_offset += BytesPerLong;
4283 break;
4284 default:
4285 ShouldNotReachHere();
4286 }
4287 fs.set_offset(real_offset);
4288 }
4289
4290
4291 // Handle the contended cases.
4292 //
4293 // Each contended field should not intersect the cache line with another contended field.
4294 // In the absence of alignment information, we end up with pessimistically separating
4295 // the fields with full-width padding.
4296 //
4297 // Additionally, this should not break alignment for the fields, so we round the alignment up
4298 // for each field.
4299 if (nonstatic_contended_count > 0) {
4300
4301 // if there is at least one contended field, we need to have pre-padding for them
4302 next_nonstatic_padded_offset += ContendedPaddingWidth;
4303
4304 // collect all contended groups
4305 ResourceBitMap bm(cp->size());
4306 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4307 // skip already laid out fields
4308 if (fs.is_offset_set()) continue;
4309
4310 if (fs.is_contended()) {
4311 bm.set_bit(fs.contended_group());
4312 }
4313 }
4314
4315 int current_group = -1;
4316 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4317
4318 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4319
4320 // skip already laid out fields
4321 if (fs.is_offset_set()) continue;
4322
4323 // skip non-contended fields and fields from different group
4324 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4325
4326 // handle statics below
4327 if (fs.access_flags().is_static()) continue;
4328
4329 int real_offset = 0;
4330 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4331
4332 switch (atype) {
4333 case NONSTATIC_BYTE:
4334 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4335 real_offset = next_nonstatic_padded_offset;
4336 next_nonstatic_padded_offset += 1;
4337 break;
4338
4339 case NONSTATIC_SHORT:
4340 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4341 real_offset = next_nonstatic_padded_offset;
4342 next_nonstatic_padded_offset += BytesPerShort;
4343 break;
4344
4345 case NONSTATIC_WORD:
4346 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4347 real_offset = next_nonstatic_padded_offset;
4348 next_nonstatic_padded_offset += BytesPerInt;
4349 break;
4350
4351 case NONSTATIC_DOUBLE:
4352 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4353 real_offset = next_nonstatic_padded_offset;
4354 next_nonstatic_padded_offset += BytesPerLong;
4355 break;
4356
4357 // Value types in static fields are handled with oops
4358 case NONSTATIC_VALUETYPE:
4359 throwValueTypeLimitation(THREAD_AND_LOCATION,
4360 "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4361 return;
4362
4363 case NONSTATIC_OOP:
4364 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4365 real_offset = next_nonstatic_padded_offset;
4366 next_nonstatic_padded_offset += heapOopSize;
4367 nonstatic_oop_maps->add(real_offset, 1);
4368 break;
4369
4370 default:
4371 ShouldNotReachHere();
4372 }
4373
4374 if (fs.contended_group() == 0) {
4375 // Contended group defines the equivalence class over the fields:
4376 // the fields within the same contended group are not inter-padded.
4377 // The only exception is default group, which does not incur the
4378 // equivalence, and so requires intra-padding.
4379 next_nonstatic_padded_offset += ContendedPaddingWidth;
4380 }
4381
4382 fs.set_offset(real_offset);
4383 } // for
4384
4385 // Start laying out the next group.
4386 // Note that this will effectively pad the last group in the back;
4387 // this is expected to alleviate memory contention effects for
4388 // subclass fields and/or adjacent object.
4389 // If this was the default group, the padding is already in place.
4390 if (current_group != 0) {
4391 next_nonstatic_padded_offset += ContendedPaddingWidth;
4392 }
4393 }
4394
4395 // handle static fields
4396 }
4397
4398 // Entire class is contended, pad in the back.
4399 // This helps to alleviate memory contention effects for subclass fields
4400 // and/or adjacent object.
4401 if (is_contended_class) {
4402 assert(!is_value_type() && !is_value_capable_class(), "@Contended not supported for value types yet");
4403 next_nonstatic_padded_offset += ContendedPaddingWidth;
4404 }
4405
4406 int notaligned_nonstatic_fields_end;
4407 if (nonstatic_value_type_count != 0) {
4408 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4409 } else {
4410 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4411 }
4412
4413 int nonstatic_field_sz_align = heapOopSize;
4414 if (is_value_type() || is_value_capable_class()) {
4415 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4416 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4417 }
4418 }
4419 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4420 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4421 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4422
4423 int static_field_size = (static_fields_end -
4424 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4425 nonstatic_field_size = nonstatic_field_size +
4426 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4427
4428 int instance_size = align_object_size(instance_end / wordSize);
4429
4430 assert(instance_size == align_object_size(align_up(
4431 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4432 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4433
4434
4435 // Invariant: nonstatic_field end/start should only change if there are
4436 // nonstatic fields in the class, or if the class is contended. We compare
4437 // against the non-aligned value, so that end alignment will not fail the
4438 // assert without actually having the fields.
4439 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4440 is_contended_class ||
4441 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4442
4443 // Number of non-static oop map blocks allocated at end of klass.
4444 nonstatic_oop_maps->compact(THREAD);
4445
4446 #ifndef PRODUCT
4447 if ((PrintFieldLayout && !is_value_type()) ||
4448 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4449 print_field_layout(_class_name,
4450 _fields,
4451 cp,
4452 instance_size,
4453 nonstatic_fields_start,
4454 nonstatic_fields_end,
4455 static_fields_end);
4456 nonstatic_oop_maps->print_on(tty);
4457 tty->print("\n");
4458 }
4459
4460 #endif
4461 // Pass back information needed for InstanceKlass creation
4462 info->oop_map_blocks = nonstatic_oop_maps;
4463 info->instance_size = instance_size;
4464 info->static_field_size = static_field_size;
4465 info->nonstatic_field_size = nonstatic_field_size;
4466 info->has_nonstatic_fields = has_nonstatic_fields;
4467 }
4468
4469 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4470 assert(ik != NULL, "invariant");
4471
4472 const Klass* const super = ik->super();
4473
4474 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4475 // in which case we don't have to register objects as finalizable
4476 if (!_has_empty_finalizer) {
4477 if (_has_finalizer ||
4478 (super != NULL && super->has_finalizer())) {
4479 ik->set_has_finalizer();
4480 }
4481 }
4482
4483 #ifdef ASSERT
4484 bool f = false;
4485 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4486 vmSymbols::void_method_signature());
4487 if (m != NULL && !m->is_empty_method()) {
4488 f = true;
4489 }
4490
4491 // Spec doesn't prevent agent from redefinition of empty finalizer.
4492 // Despite the fact that it's generally bad idea and redefined finalizer
4493 // will not work as expected we shouldn't abort vm in this case
4494 if (!ik->has_redefined_this_or_super()) {
4495 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4496 }
4497 #endif
4498
4499 // Check if this klass supports the java.lang.Cloneable interface
4500 if (SystemDictionary::Cloneable_klass_loaded()) {
4501 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4502 ik->set_is_cloneable();
4503 }
4504 }
4505
4506 // Check if this klass has a vanilla default constructor
4507 if (super == NULL) {
4508 // java.lang.Object has empty default constructor
4509 ik->set_has_vanilla_constructor();
4510 } else {
4511 if (super->has_vanilla_constructor() &&
4512 _has_vanilla_constructor) {
4513 ik->set_has_vanilla_constructor();
4514 }
4515 #ifdef ASSERT
4516 bool v = false;
4517 if (super->has_vanilla_constructor()) {
4518 const Method* const constructor =
4519 ik->find_method(vmSymbols::object_initializer_name(),
4520 vmSymbols::void_method_signature());
4521 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4522 v = true;
4523 }
4524 }
4525 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4526 #endif
4527 }
4528
4529 // If it cannot be fast-path allocated, set a bit in the layout helper.
4530 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4531 assert(ik->size_helper() > 0, "layout_helper is initialized");
4532 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4533 || ik->is_abstract() || ik->is_interface()
4534 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4535 || ik->size_helper() >= FastAllocateSizeLimit) {
4536 // Forbid fast-path allocation.
4537 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4538 ik->set_layout_helper(lh);
4539 }
4540 }
4541
4542 bool ClassFileParser::supports_value_types() const {
4543 // Value types are only supported by class file version 53.1 and later
4544 return _major_version > JAVA_9_VERSION || (_major_version == JAVA_9_VERSION && _minor_version >= 1);
4545 }
4546
4547 // Attach super classes and interface classes to class loader data
4548 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4549 TRAPS) {
4550 assert(defined_klass != NULL, "invariant");
4551
4552 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4553 if (defining_loader_data->is_the_null_class_loader_data()) {
4554 // Dependencies to null class loader data are implicit.
4555 return;
4556 } else {
4557 // add super class dependency
4558 Klass* const super = defined_klass->super();
4559 if (super != NULL) {
4560 defining_loader_data->record_dependency(super, CHECK);
4561 }
4562
4563 // add super interface dependencies
4564 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4565 if (local_interfaces != NULL) {
4566 const int length = local_interfaces->length();
4567 for (int i = 0; i < length; i++) {
4568 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4569 }
4570 }
4571
4572 for (FieldStream st((InstanceKlass*)defined_klass, false, false); !st.eos(); st.next()) {
4573 Symbol* signature = st.signature();
4574 if (signature->starts_with("Q")) {
4575 Klass* klass = SystemDictionary::resolve_or_fail(signature,
4576 Handle(THREAD, defined_klass->class_loader()),
4577 Handle(THREAD, defined_klass->protection_domain()), true, CHECK);
4578 assert(klass != NULL, "Sanity check");
4579 assert(klass->access_flags().is_value_type(), "Value type expected");
4580 defining_loader_data->record_dependency(klass, CHECK);
4581 }
4582 }
4583 }
4584 }
4585
4586 // utility methods for appending an array with check for duplicates
4587
4588 static void append_interfaces(GrowableArray<Klass*>* result,
4589 const Array<Klass*>* const ifs) {
4590 // iterate over new interfaces
4591 for (int i = 0; i < ifs->length(); i++) {
4592 Klass* const e = ifs->at(i);
4593 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4594 // add new interface
4595 result->append_if_missing(e);
4596 }
4597 }
4598
4599 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4600 Array<Klass*>* local_ifs,
4601 ClassLoaderData* loader_data,
4602 TRAPS) {
4603 assert(local_ifs != NULL, "invariant");
4604 assert(loader_data != NULL, "invariant");
4605
4606 // Compute maximum size for transitive interfaces
4607 int max_transitive_size = 0;
4608 int super_size = 0;
4609 // Add superclass transitive interfaces size
4610 if (super != NULL) {
4611 super_size = super->transitive_interfaces()->length();
4612 max_transitive_size += super_size;
4613 }
4614 // Add local interfaces' super interfaces
4615 const int local_size = local_ifs->length();
4616 for (int i = 0; i < local_size; i++) {
4617 Klass* const l = local_ifs->at(i);
4618 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4619 }
4620 // Finally add local interfaces
4621 max_transitive_size += local_size;
4622 // Construct array
4623 if (max_transitive_size == 0) {
4624 // no interfaces, use canonicalized array
4625 return Universe::the_empty_klass_array();
4626 } else if (max_transitive_size == super_size) {
4627 // no new local interfaces added, share superklass' transitive interface array
4628 return super->transitive_interfaces();
4629 } else if (max_transitive_size == local_size) {
4630 // only local interfaces added, share local interface array
4631 return local_ifs;
4632 } else {
4633 ResourceMark rm;
4634 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4635
4636 // Copy down from superclass
4637 if (super != NULL) {
4638 append_interfaces(result, super->transitive_interfaces());
4639 }
4640
4641 // Copy down from local interfaces' superinterfaces
4642 for (int i = 0; i < local_size; i++) {
4643 Klass* const l = local_ifs->at(i);
4644 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4645 }
4646 // Finally add local interfaces
4647 append_interfaces(result, local_ifs);
4648
4649 // length will be less than the max_transitive_size if duplicates were removed
4650 const int length = result->length();
4651 assert(length <= max_transitive_size, "just checking");
4652 Array<Klass*>* const new_result =
4653 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4654 for (int i = 0; i < length; i++) {
4655 Klass* const e = result->at(i);
4656 assert(e != NULL, "just checking");
4657 new_result->at_put(i, e);
4658 }
4659 return new_result;
4660 }
4661 }
4662
4663 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4664 assert(this_klass != NULL, "invariant");
4665 const Klass* const super = this_klass->super();
4666 if (super != NULL) {
4667
4668 // If the loader is not the boot loader then throw an exception if its
4669 // superclass is in package jdk.internal.reflect and its loader is not a
4670 // special reflection class loader
4671 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4672 assert(super->is_instance_klass(), "super is not instance klass");
4673 PackageEntry* super_package = super->package();
4674 if (super_package != NULL &&
4675 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4676 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4677 ResourceMark rm(THREAD);
4678 Exceptions::fthrow(
4679 THREAD_AND_LOCATION,
4680 vmSymbols::java_lang_IllegalAccessError(),
4681 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4682 this_klass->external_name(),
4683 this_klass->class_loader_data()->loader_name(),
4684 super->external_name());
4685 return;
4686 }
4687 }
4688
4689 Reflection::VerifyClassAccessResults vca_result =
4690 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4691 if (vca_result != Reflection::ACCESS_OK) {
4692 ResourceMark rm(THREAD);
4693 char* msg = Reflection::verify_class_access_msg(this_klass,
4694 InstanceKlass::cast(super),
4695 vca_result);
4696 if (msg == NULL) {
4697 Exceptions::fthrow(
4698 THREAD_AND_LOCATION,
4699 vmSymbols::java_lang_IllegalAccessError(),
4700 "class %s cannot access its superclass %s",
4701 this_klass->external_name(),
4702 super->external_name());
4703 } else {
4704 // Add additional message content.
4705 Exceptions::fthrow(
4706 THREAD_AND_LOCATION,
4707 vmSymbols::java_lang_IllegalAccessError(),
4708 "superclass access check failed: %s",
4709 msg);
4710 }
4711 }
4712 }
4713 }
4714
4715
4716 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4717 assert(this_klass != NULL, "invariant");
4718 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4719 const int lng = local_interfaces->length();
4720 for (int i = lng - 1; i >= 0; i--) {
4721 Klass* const k = local_interfaces->at(i);
4722 assert (k != NULL && k->is_interface(), "invalid interface");
4723 Reflection::VerifyClassAccessResults vca_result =
4724 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4725 if (vca_result != Reflection::ACCESS_OK) {
4726 ResourceMark rm(THREAD);
4727 char* msg = Reflection::verify_class_access_msg(this_klass,
4728 InstanceKlass::cast(k),
4729 vca_result);
4730 if (msg == NULL) {
4731 Exceptions::fthrow(
4732 THREAD_AND_LOCATION,
4733 vmSymbols::java_lang_IllegalAccessError(),
4734 "class %s cannot access its superinterface %s",
4735 this_klass->external_name(),
4736 k->external_name());
4737 } else {
4738 // Add additional message content.
4739 Exceptions::fthrow(
4740 THREAD_AND_LOCATION,
4741 vmSymbols::java_lang_IllegalAccessError(),
4742 "superinterface check failed: %s",
4743 msg);
4744 }
4745 }
4746 }
4747 }
4748
4749
4750 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4751 assert(this_klass != NULL, "invariant");
4752 const Array<Method*>* const methods = this_klass->methods();
4753 const int num_methods = methods->length();
4754
4755 // go thru each method and check if it overrides a final method
4756 for (int index = 0; index < num_methods; index++) {
4757 const Method* const m = methods->at(index);
4758
4759 // skip private, static, and <init> methods
4760 if ((!m->is_private() && !m->is_static()) &&
4761 (m->name() != vmSymbols::object_initializer_name())) {
4762
4763 const Symbol* const name = m->name();
4764 const Symbol* const signature = m->signature();
4765 const Klass* k = this_klass->super();
4766 const Method* super_m = NULL;
4767 while (k != NULL) {
4768 // skip supers that don't have final methods.
4769 if (k->has_final_method()) {
4770 // lookup a matching method in the super class hierarchy
4771 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4772 if (super_m == NULL) {
4773 break; // didn't find any match; get out
4774 }
4775
4776 if (super_m->is_final() && !super_m->is_static() &&
4777 // matching method in super is final, and not static
4778 (Reflection::verify_field_access(this_klass,
4779 super_m->method_holder(),
4780 super_m->method_holder(),
4781 super_m->access_flags(), false))
4782 // this class can access super final method and therefore override
4783 ) {
4784 ResourceMark rm(THREAD);
4785 Exceptions::fthrow(
4786 THREAD_AND_LOCATION,
4787 vmSymbols::java_lang_VerifyError(),
4788 "class %s overrides final method %s.%s%s",
4789 this_klass->external_name(),
4790 super_m->method_holder()->external_name(),
4791 name->as_C_string(),
4792 signature->as_C_string()
4793 );
4794 return;
4795 }
4796
4797 // continue to look from super_m's holder's super.
4798 k = super_m->method_holder()->super();
4799 continue;
4800 }
4801
4802 k = k->super();
4803 }
4804 }
4805 }
4806 }
4807
4808
4809 // assumes that this_klass is an interface
4810 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4811 assert(this_klass != NULL, "invariant");
4812 assert(this_klass->is_interface(), "not an interface");
4813 const Array<Method*>* methods = this_klass->methods();
4814 const int num_methods = methods->length();
4815
4816 for (int index = 0; index < num_methods; index++) {
4817 const Method* const m = methods->at(index);
4818 // if m is static and not the init method, throw a verify error
4819 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4820 ResourceMark rm(THREAD);
4821 Exceptions::fthrow(
4822 THREAD_AND_LOCATION,
4823 vmSymbols::java_lang_VerifyError(),
4824 "Illegal static method %s in interface %s",
4825 m->name()->as_C_string(),
4826 this_klass->external_name()
4827 );
4828 return;
4829 }
4830 }
4831 }
4832
4833 // utility methods for format checking
4834
4835 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4836 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4837 const bool is_value_type = (flags & JVM_ACC_VALUE) != 0;
4838 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4839 assert(supports_value_types() || !is_value_type, "JVM_ACC_VALUE should not be set");
4840 if (is_module) {
4841 ResourceMark rm(THREAD);
4842 Exceptions::fthrow(
4843 THREAD_AND_LOCATION,
4844 vmSymbols::java_lang_NoClassDefFoundError(),
4845 "%s is not a class because access_flag ACC_MODULE is set",
4846 _class_name->as_C_string());
4847 return;
4848 }
4849
4850 if (!_need_verify) { return; }
4851
4852 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4853 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4854 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4855 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4856 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4857 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4858 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4859
4860 if ((is_abstract && is_final) ||
4861 (is_interface && !is_abstract) ||
4862 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4863 (!is_interface && major_gte_15 && is_annotation)) {
4864 ResourceMark rm(THREAD);
4865 Exceptions::fthrow(
4866 THREAD_AND_LOCATION,
4867 vmSymbols::java_lang_ClassFormatError(),
4868 "Illegal class modifiers in class %s: 0x%X",
4869 _class_name->as_C_string(), flags
4870 );
4871 return;
4872 }
4873 }
4874
4875 static bool has_illegal_visibility(jint flags) {
4876 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4877 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4878 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4879
4880 return ((is_public && is_protected) ||
4881 (is_public && is_private) ||
4882 (is_protected && is_private));
4883 }
4884
4885 static bool is_supported_version(u2 major, u2 minor) {
4886 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4887 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4888 (major <= max_version) &&
4889 ((major != max_version) ||
4890 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4891 }
4892
4893 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4894 bool is_interface,
4895 TRAPS) const {
4896 if (!_need_verify) { return; }
4897
4898 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4899 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4900 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4901 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4902 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4903 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4904 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4905 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4906 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4907
4908 bool is_illegal = false;
4909
4910 if (is_interface) {
4911 if (!is_public || !is_static || !is_final || is_private ||
4912 is_protected || is_volatile || is_transient ||
4913 (major_gte_15 && is_enum)) {
4914 is_illegal = true;
4915 }
4916 } else { // not interface
4917 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4918 is_illegal = true;
4919 }
4920 }
4921
4922 if (is_illegal) {
4923 ResourceMark rm(THREAD);
4924 Exceptions::fthrow(
4925 THREAD_AND_LOCATION,
4926 vmSymbols::java_lang_ClassFormatError(),
4927 "Illegal field modifiers in class %s: 0x%X",
4928 _class_name->as_C_string(), flags);
4929 return;
4930 }
4931 }
4932
4933 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4934 bool is_interface,
4935 const Symbol* name,
4936 TRAPS) const {
4937 if (!_need_verify) { return; }
4938
4939 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4940 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4941 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4942 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4943 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4944 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4945 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4946 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4947 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4948 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4949 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4950 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4951 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4952
4953 bool is_illegal = false;
4954
4955 if (is_interface) {
4956 if (major_gte_8) {
4957 // Class file version is JAVA_8_VERSION or later Methods of
4958 // interfaces may set any of the flags except ACC_PROTECTED,
4959 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4960 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4961 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4962 (is_native || is_protected || is_final || is_synchronized) ||
4963 // If a specific method of a class or interface has its
4964 // ACC_ABSTRACT flag set, it must not have any of its
4965 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4966 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4967 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4968 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4969 (is_abstract && (is_private || is_static || is_strict))) {
4970 is_illegal = true;
4971 }
4972 } else if (major_gte_15) {
4973 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4974 if (!is_public || is_private || is_protected || is_static || is_final ||
4975 is_synchronized || is_native || !is_abstract || is_strict) {
4976 is_illegal = true;
4977 }
4978 } else {
4979 // Class file version is pre-JAVA_1_5_VERSION
4980 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4981 is_illegal = true;
4982 }
4983 }
4984 } else { // not interface
4985 if (has_illegal_visibility(flags)) {
4986 is_illegal = true;
4987 } else {
4988 if (is_initializer) {
4989 if (is_static || is_final || is_synchronized || is_native ||
4990 is_abstract || (major_gte_15 && is_bridge)) {
4991 is_illegal = true;
4992 }
4993 } else { // not initializer
4994 if (is_abstract) {
4995 if ((is_final || is_native || is_private || is_static ||
4996 (major_gte_15 && (is_synchronized || is_strict)))) {
4997 is_illegal = true;
4998 }
4999 }
5000 }
5001 }
5002 }
5003
5004 if (is_illegal) {
5005 ResourceMark rm(THREAD);
5006 Exceptions::fthrow(
5007 THREAD_AND_LOCATION,
5008 vmSymbols::java_lang_ClassFormatError(),
5009 "Method %s in class %s has illegal modifiers: 0x%X",
5010 name->as_C_string(), _class_name->as_C_string(), flags);
5011 return;
5012 }
5013 }
5014
5015 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5016 int length,
5017 TRAPS) const {
5018 assert(_need_verify, "only called when _need_verify is true");
5019 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5020 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5021 }
5022 }
5023
5024 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5025 // In class names, '/' separates unqualified names. This is verified in this function also.
5026 // Method names also may not contain the characters '<' or '>', unless <init>
5027 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5028 // method. Because these names have been checked as special cases before
5029 // calling this method in verify_legal_method_name.
5030 //
5031 // This method is also called from the modular system APIs in modules.cpp
5032 // to verify the validity of module and package names.
5033 bool ClassFileParser::verify_unqualified_name(const char* name,
5034 unsigned int length,
5035 int type) {
5036 for (const char* p = name; p != name + length;) {
5037 jchar ch = *p;
5038 if (ch < 128) {
5039 if (ch == '.' || ch == ';' || ch == '[' ) {
5040 return false; // do not permit '.', ';', or '['
5041 }
5042 if (ch == '/') {
5043 // check for '//' or leading or trailing '/' which are not legal
5044 // unqualified name must not be empty
5045 if (type == ClassFileParser::LegalClass) {
5046 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5047 return false;
5048 }
5049 } else {
5050 return false; // do not permit '/' unless it's class name
5051 }
5052 }
5053 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5054 return false; // do not permit '<' or '>' in method names
5055 }
5056 p++;
5057 } else {
5058 char* tmp_p = UTF8::next(p, &ch);
5059 p = tmp_p;
5060 }
5061 }
5062 return true;
5063 }
5064
5065 // Take pointer to a string. Skip over the longest part of the string that could
5066 // be taken as a fieldname. Allow '/' if slash_ok is true.
5067 // Return a pointer to just past the fieldname.
5068 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5069 // being true, we saw consecutive slashes (meaning we were looking for a
5070 // qualified path but found something that was badly-formed).
5071 static const char* skip_over_field_name(const char* name,
5072 bool slash_ok,
5073 unsigned int length) {
5074 const char* p;
5075 jboolean last_is_slash = false;
5076 jboolean not_first_ch = false;
5077
5078 for (p = name; p != name + length; not_first_ch = true) {
5079 const char* old_p = p;
5080 jchar ch = *p;
5081 if (ch < 128) {
5082 p++;
5083 // quick check for ascii
5084 if ((ch >= 'a' && ch <= 'z') ||
5085 (ch >= 'A' && ch <= 'Z') ||
5086 (ch == '_' || ch == '$') ||
5087 (not_first_ch && ch >= '0' && ch <= '9')) {
5088 last_is_slash = false;
5089 continue;
5090 }
5091 if (slash_ok && ch == '/') {
5092 if (last_is_slash) {
5093 return NULL; // Don't permit consecutive slashes
5094 }
5095 last_is_slash = true;
5096 continue;
5097 }
5098 }
5099 else {
5100 jint unicode_ch;
5101 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5102 p = tmp_p;
5103 last_is_slash = false;
5104 // Check if ch is Java identifier start or is Java identifier part
5105 // 4672820: call java.lang.Character methods directly without generating separate tables.
5106 EXCEPTION_MARK;
5107
5108 // return value
5109 JavaValue result(T_BOOLEAN);
5110 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5111 JavaCallArguments args;
5112 args.push_int(unicode_ch);
5113
5114 // public static boolean isJavaIdentifierStart(char ch);
5115 JavaCalls::call_static(&result,
5116 SystemDictionary::Character_klass(),
5117 vmSymbols::isJavaIdentifierStart_name(),
5118 vmSymbols::int_bool_signature(),
5119 &args,
5120 THREAD);
5121
5122 if (HAS_PENDING_EXCEPTION) {
5123 CLEAR_PENDING_EXCEPTION;
5124 return 0;
5125 }
5126 if (result.get_jboolean()) {
5127 continue;
5128 }
5129
5130 if (not_first_ch) {
5131 // public static boolean isJavaIdentifierPart(char ch);
5132 JavaCalls::call_static(&result,
5133 SystemDictionary::Character_klass(),
5134 vmSymbols::isJavaIdentifierPart_name(),
5135 vmSymbols::int_bool_signature(),
5136 &args,
5137 THREAD);
5138
5139 if (HAS_PENDING_EXCEPTION) {
5140 CLEAR_PENDING_EXCEPTION;
5141 return 0;
5142 }
5143
5144 if (result.get_jboolean()) {
5145 continue;
5146 }
5147 }
5148 }
5149 return (not_first_ch) ? old_p : NULL;
5150 }
5151 return (not_first_ch) ? p : NULL;
5152 }
5153
5154 // Take pointer to a string. Skip over the longest part of the string that could
5155 // be taken as a field signature. Allow "void" if void_ok.
5156 // Return a pointer to just past the signature.
5157 // Return NULL if no legal signature is found.
5158 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5159 bool void_ok,
5160 unsigned int length,
5161 TRAPS) const {
5162 unsigned int array_dim = 0;
5163 while (length > 0) {
5164 switch (signature[0]) {
5165 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5166 case JVM_SIGNATURE_BOOLEAN:
5167 case JVM_SIGNATURE_BYTE:
5168 case JVM_SIGNATURE_CHAR:
5169 case JVM_SIGNATURE_SHORT:
5170 case JVM_SIGNATURE_INT:
5171 case JVM_SIGNATURE_FLOAT:
5172 case JVM_SIGNATURE_LONG:
5173 case JVM_SIGNATURE_DOUBLE:
5174 return signature + 1;
5175 case JVM_SIGNATURE_CLASS:
5176 case JVM_SIGNATURE_VALUE_CLASS: {
5177 if (_major_version < JAVA_1_5_VERSION) {
5178 // Skip over the class name if one is there
5179 const char* const p = skip_over_field_name(signature + 1, true, --length);
5180
5181 // The next character better be a semicolon
5182 if (p && (p - signature) > 1 && p[0] == ';') {
5183 return p + 1;
5184 }
5185 }
5186 else {
5187 // Skip leading 'L' and ignore first appearance of ';'
5188 length--;
5189 signature++;
5190 char* c = strchr((char*) signature, ';');
5191 // Format check signature
5192 if (c != NULL) {
5193 ResourceMark rm(THREAD);
5194 int newlen = c - (char*) signature;
5195 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5196 strncpy(sig, signature, newlen);
5197 sig[newlen] = '\0';
5198
5199 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5200 if (!legal) {
5201 classfile_parse_error("Class name contains illegal character "
5202 "in descriptor in class file %s",
5203 CHECK_0);
5204 return NULL;
5205 }
5206 return signature + newlen + 1;
5207 }
5208 }
5209 return NULL;
5210 }
5211 case JVM_SIGNATURE_ARRAY:
5212 array_dim++;
5213 if (array_dim > 255) {
5214 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5215 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5216 }
5217 // The rest of what's there better be a legal signature
5218 signature++;
5219 length--;
5220 void_ok = false;
5221 break;
5222 default:
5223 return NULL;
5224 }
5225 }
5226 return NULL;
5227 }
5228
5229 // Checks if name is a legal class name.
5230 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5231 if (!_need_verify || _relax_verify) { return; }
5232
5233 char buf[fixed_buffer_size];
5234 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5235 unsigned int length = name->utf8_length();
5236 bool legal = false;
5237
5238 if (length > 0) {
5239 const char* p;
5240 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5241 p = skip_over_field_signature(bytes, false, length, CHECK);
5242 legal = (p != NULL) && ((p - bytes) == (int)length);
5243 } else if (_major_version < JAVA_1_5_VERSION) {
5244 if (bytes[0] != '<') {
5245 p = skip_over_field_name(bytes, true, length);
5246 legal = (p != NULL) && ((p - bytes) == (int)length);
5247 }
5248 } else {
5249 // 4900761: relax the constraints based on JSR202 spec
5250 // Class names may be drawn from the entire Unicode character set.
5251 // Identifiers between '/' must be unqualified names.
5252 // The utf8 string has been verified when parsing cpool entries.
5253 legal = verify_unqualified_name(bytes, length, LegalClass);
5254 }
5255 }
5256 if (!legal) {
5257 ResourceMark rm(THREAD);
5258 assert(_class_name != NULL, "invariant");
5259 Exceptions::fthrow(
5260 THREAD_AND_LOCATION,
5261 vmSymbols::java_lang_ClassFormatError(),
5262 "Illegal class name \"%s\" in class file %s", bytes,
5263 _class_name->as_C_string()
5264 );
5265 return;
5266 }
5267 }
5268
5269 // Checks if name is a legal field name.
5270 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5271 if (!_need_verify || _relax_verify) { return; }
5272
5273 char buf[fixed_buffer_size];
5274 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5275 unsigned int length = name->utf8_length();
5276 bool legal = false;
5277
5278 if (length > 0) {
5279 if (_major_version < JAVA_1_5_VERSION) {
5280 if (bytes[0] != '<') {
5281 const char* p = skip_over_field_name(bytes, false, length);
5282 legal = (p != NULL) && ((p - bytes) == (int)length);
5283 }
5284 } else {
5285 // 4881221: relax the constraints based on JSR202 spec
5286 legal = verify_unqualified_name(bytes, length, LegalField);
5287 }
5288 }
5289
5290 if (!legal) {
5291 ResourceMark rm(THREAD);
5292 assert(_class_name != NULL, "invariant");
5293 Exceptions::fthrow(
5294 THREAD_AND_LOCATION,
5295 vmSymbols::java_lang_ClassFormatError(),
5296 "Illegal field name \"%s\" in class %s", bytes,
5297 _class_name->as_C_string()
5298 );
5299 return;
5300 }
5301 }
5302
5303 // Checks if name is a legal method name.
5304 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5305 if (!_need_verify || _relax_verify) { return; }
5306
5307 assert(name != NULL, "method name is null");
5308 char buf[fixed_buffer_size];
5309 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5310 unsigned int length = name->utf8_length();
5311 bool legal = false;
5312
5313 if (length > 0) {
5314 if (bytes[0] == '<') {
5315 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5316 legal = true;
5317 }
5318 } else if (_major_version < JAVA_1_5_VERSION) {
5319 const char* p;
5320 p = skip_over_field_name(bytes, false, length);
5321 legal = (p != NULL) && ((p - bytes) == (int)length);
5322 } else {
5323 // 4881221: relax the constraints based on JSR202 spec
5324 legal = verify_unqualified_name(bytes, length, LegalMethod);
5325 }
5326 }
5327
5328 if (!legal) {
5329 ResourceMark rm(THREAD);
5330 assert(_class_name != NULL, "invariant");
5331 Exceptions::fthrow(
5332 THREAD_AND_LOCATION,
5333 vmSymbols::java_lang_ClassFormatError(),
5334 "Illegal method name \"%s\" in class %s", bytes,
5335 _class_name->as_C_string()
5336 );
5337 return;
5338 }
5339 }
5340
5341
5342 // Checks if signature is a legal field signature.
5343 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5344 const Symbol* signature,
5345 TRAPS) const {
5346 if (!_need_verify) { return; }
5347
5348 char buf[fixed_buffer_size];
5349 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5350 const unsigned int length = signature->utf8_length();
5351 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5352
5353 if (p == NULL || (p - bytes) != (int)length) {
5354 throwIllegalSignature("Field", name, signature, CHECK);
5355 }
5356 }
5357
5358 // Checks if signature is a legal method signature.
5359 // Returns number of parameters
5360 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5361 const Symbol* signature,
5362 TRAPS) const {
5363 if (!_need_verify) {
5364 // make sure caller's args_size will be less than 0 even for non-static
5365 // method so it will be recomputed in compute_size_of_parameters().
5366 return -2;
5367 }
5368
5369 // Class initializers cannot have args for class format version >= 51.
5370 if (name == vmSymbols::class_initializer_name() &&
5371 signature != vmSymbols::void_method_signature() &&
5372 _major_version >= JAVA_7_VERSION) {
5373 throwIllegalSignature("Method", name, signature, CHECK_0);
5374 return 0;
5375 }
5376
5377 unsigned int args_size = 0;
5378 char buf[fixed_buffer_size];
5379 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5380 unsigned int length = signature->utf8_length();
5381 const char* nextp;
5382
5383 // The first character must be a '('
5384 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5385 length--;
5386 // Skip over legal field signatures
5387 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5388 while ((length > 0) && (nextp != NULL)) {
5389 args_size++;
5390 if (p[0] == 'J' || p[0] == 'D') {
5391 args_size++;
5392 }
5393 length -= nextp - p;
5394 p = nextp;
5395 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5396 }
5397 // The first non-signature thing better be a ')'
5398 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5399 length--;
5400 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5401 // All internal methods must return void
5402 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5403 return args_size;
5404 }
5405 } else {
5406 // Now we better just have a return value
5407 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5408 if (nextp && ((int)length == (nextp - p))) {
5409 return args_size;
5410 }
5411 }
5412 }
5413 }
5414 // Report error
5415 throwIllegalSignature("Method", name, signature, CHECK_0);
5416 return 0;
5417 }
5418
5419 int ClassFileParser::static_field_size() const {
5420 assert(_field_info != NULL, "invariant");
5421 return _field_info->static_field_size;
5422 }
5423
5424 int ClassFileParser::total_oop_map_count() const {
5425 assert(_field_info != NULL, "invariant");
5426 return _field_info->oop_map_blocks->nonstatic_oop_map_count;
5427 }
5428
5429 jint ClassFileParser::layout_size() const {
5430 assert(_field_info != NULL, "invariant");
5431 return _field_info->instance_size;
5432 }
5433
5434 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5435 const Array<Method*>* methods) {
5436 assert(ik != NULL, "invariant");
5437 assert(methods != NULL, "invariant");
5438
5439 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5440 // (We used to do this lazily, but now we query it in Rewriter,
5441 // which is eagerly done for every method, so we might as well do it now,
5442 // when everything is fresh in memory.)
5443 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5444
5445 if (klass_id != vmSymbols::NO_SID) {
5446 for (int j = 0; j < methods->length(); ++j) {
5447 Method* method = methods->at(j);
5448 method->init_intrinsic_id();
5449
5450 if (CheckIntrinsics) {
5451 // Check if an intrinsic is defined for method 'method',
5452 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5453 if (method->intrinsic_id() != vmIntrinsics::_none &&
5454 !method->intrinsic_candidate()) {
5455 tty->print("Compiler intrinsic is defined for method [%s], "
5456 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5457 method->name_and_sig_as_C_string(),
5458 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5459 );
5460 tty->cr();
5461 DEBUG_ONLY(vm_exit(1));
5462 }
5463 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5464 // but there is no intrinsic available for it.
5465 if (method->intrinsic_candidate() &&
5466 method->intrinsic_id() == vmIntrinsics::_none) {
5467 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5468 "but no compiler intrinsic is defined for the method.%s",
5469 method->name_and_sig_as_C_string(),
5470 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5471 );
5472 tty->cr();
5473 DEBUG_ONLY(vm_exit(1));
5474 }
5475 }
5476 } // end for
5477
5478 #ifdef ASSERT
5479 if (CheckIntrinsics) {
5480 // Check for orphan methods in the current class. A method m
5481 // of a class C is orphan if an intrinsic is defined for method m,
5482 // but class C does not declare m.
5483 // The check is potentially expensive, therefore it is available
5484 // only in debug builds.
5485
5486 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5487 if (vmIntrinsics::_compiledLambdaForm == id) {
5488 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5489 // generated for the JVM from a LambdaForm and therefore no method
5490 // is defined for it.
5491 continue;
5492 }
5493
5494 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5495 // Check if the current class contains a method with the same
5496 // name, flags, signature.
5497 bool match = false;
5498 for (int j = 0; j < methods->length(); ++j) {
5499 const Method* method = methods->at(j);
5500 if (method->intrinsic_id() == id) {
5501 match = true;
5502 break;
5503 }
5504 }
5505
5506 if (!match) {
5507 char buf[1000];
5508 tty->print("Compiler intrinsic is defined for method [%s], "
5509 "but the method is not available in class [%s].%s",
5510 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5511 buf, sizeof(buf)),
5512 ik->name()->as_C_string(),
5513 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5514 );
5515 tty->cr();
5516 DEBUG_ONLY(vm_exit(1));
5517 }
5518 }
5519 } // end for
5520 } // CheckIntrinsics
5521 #endif // ASSERT
5522 }
5523 }
5524
5525 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5526 if (_klass != NULL) {
5527 return _klass;
5528 }
5529
5530 InstanceKlass* const ik =
5531 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5532
5533 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5534
5535 assert(_klass == ik, "invariant");
5536
5537 ik->set_has_passed_fingerprint_check(false);
5538 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5539 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5540 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5541 // This class matches with a class saved in an AOT library
5542 ik->set_has_passed_fingerprint_check(true);
5543 } else {
5544 ResourceMark rm;
5545 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5546 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5547 }
5548 }
5549
5550 return ik;
5551 }
5552
5553 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5554 assert(ik != NULL, "invariant");
5555
5556 set_klass_to_deallocate(ik);
5557
5558 assert(_field_info != NULL, "invariant");
5559 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5560 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count,
5561 "sanity");
5562
5563 assert(ik->is_instance_klass(), "sanity");
5564 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5565
5566 // Fill in information already parsed
5567 ik->set_should_verify_class(_need_verify);
5568
5569 // Not yet: supers are done below to support the new subtype-checking fields
5570 ik->set_class_loader_data(_loader_data);
5571 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5572 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5573 assert(_fac != NULL, "invariant");
5574 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_VALUETYPE]);
5575
5576 // this transfers ownership of a lot of arrays from
5577 // the parser onto the InstanceKlass*
5578 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5579
5580 // note that is not safe to use the fields in the parser from this point on
5581 assert(NULL == _cp, "invariant");
5582 assert(NULL == _fields, "invariant");
5583 assert(NULL == _methods, "invariant");
5584 assert(NULL == _inner_classes, "invariant");
5585 assert(NULL == _local_interfaces, "invariant");
5586 assert(NULL == _transitive_interfaces, "invariant");
5587 assert(NULL == _combined_annotations, "invariant");
5588
5589 if (_has_final_method) {
5590 ik->set_has_final_method();
5591 }
5592
5593 ik->copy_method_ordering(_method_ordering, CHECK);
5594 // The InstanceKlass::_methods_jmethod_ids cache
5595 // is managed on the assumption that the initial cache
5596 // size is equal to the number of methods in the class. If
5597 // that changes, then InstanceKlass::idnum_can_increment()
5598 // has to be changed accordingly.
5599 ik->set_initial_method_idnum(ik->methods()->length());
5600
5601 ik->set_name(_class_name);
5602
5603 if (is_anonymous()) {
5604 // _this_class_index is a CONSTANT_Class entry that refers to this
5605 // anonymous class itself. If this class needs to refer to its own methods or
5606 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5607 // _this_class_index. However, because this class is anonymous (it's
5608 // not stored in SystemDictionary), _this_class_index cannot be resolved
5609 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5610 // Therefore, we must eagerly resolve _this_class_index now.
5611 ik->constants()->klass_at_put(_this_class_index, ik);
5612 }
5613
5614 ik->set_minor_version(_minor_version);
5615 ik->set_major_version(_major_version);
5616 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5617 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5618
5619 if (_host_klass != NULL) {
5620 assert (ik->is_anonymous(), "should be the same");
5621 ik->set_host_klass(_host_klass);
5622 }
5623
5624 // Set PackageEntry for this_klass
5625 oop cl = ik->class_loader();
5626 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5627 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5628 ik->set_package(cld, CHECK);
5629
5630 const Array<Method*>* const methods = ik->methods();
5631 assert(methods != NULL, "invariant");
5632 const int methods_len = methods->length();
5633
5634 check_methods_for_intrinsics(ik, methods);
5635
5636 // Fill in field values obtained by parse_classfile_attributes
5637 if (_parsed_annotations->has_any_annotations()) {
5638 _parsed_annotations->apply_to(ik);
5639 }
5640
5641 apply_parsed_class_attributes(ik);
5642
5643 // Miranda methods
5644 if ((_num_miranda_methods > 0) ||
5645 // if this class introduced new miranda methods or
5646 (_super_klass != NULL && _super_klass->has_miranda_methods())
5647 // super class exists and this class inherited miranda methods
5648 ) {
5649 ik->set_has_miranda_methods(); // then set a flag
5650 }
5651
5652 // Fill in information needed to compute superclasses.
5653 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5654
5655 // Initialize itable offset tables
5656 klassItable::setup_itable_offset_table(ik);
5657
5658 // Compute transitive closure of interfaces this class implements
5659 // Do final class setup
5660 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5661 if (oop_map_blocks->nonstatic_oop_map_count > 0) {
5662 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5663 }
5664
5665 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5666 set_precomputed_flags(ik);
5667
5668 // check if this class can access its super class
5669 check_super_class_access(ik, CHECK);
5670
5671 // check if this class can access its superinterfaces
5672 check_super_interface_access(ik, CHECK);
5673
5674 // check if this class overrides any final method
5675 check_final_method_override(ik, CHECK);
5676
5677 // reject static interface methods prior to Java 8
5678 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5679 check_illegal_static_method(ik, CHECK);
5680 }
5681
5682 // Obtain this_klass' module entry
5683 ModuleEntry* module_entry = ik->module();
5684 assert(module_entry != NULL, "module_entry should always be set");
5685
5686 // Obtain java.lang.Module
5687 Handle module_handle(THREAD, module_entry->module());
5688
5689 // Allocate mirror and initialize static fields
5690 // The create_mirror() call will also call compute_modifiers()
5691 java_lang_Class::create_mirror(ik,
5692 Handle(THREAD, _loader_data->class_loader()),
5693 module_handle,
5694 _protection_domain,
5695 CHECK);
5696
5697 assert(_all_mirandas != NULL, "invariant");
5698
5699 // Generate any default methods - default methods are public interface methods
5700 // that have a default implementation. This is new with Java 8.
5701 if (_has_nonstatic_concrete_methods) {
5702 DefaultMethods::generate_default_methods(ik,
5703 _all_mirandas,
5704 CHECK);
5705 }
5706
5707 if (is_value_type()) {
5708 ValueKlass* vk = ValueKlass::cast(ik);
5709 vk->set_if_bufferable();
5710 vk->initialize_calling_convention();
5711 }
5712
5713 // Valhalla shady value type conversion
5714 if (_parsed_annotations->is_value_capable_class()) {
5715 ik->create_value_capable_class(Handle(THREAD, _loader_data->class_loader()),
5716 _protection_domain, CHECK);
5717 }
5718
5719 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5720 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5721 !module_entry->has_default_read_edges()) {
5722 if (!module_entry->set_has_default_read_edges()) {
5723 // We won a potential race
5724 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5725 }
5726 }
5727
5728 // Update the loader_data graph.
5729 record_defined_class_dependencies(ik, CHECK);
5730
5731 for (FieldStream st((InstanceKlass*)ik, false, false); !st.eos(); st.next()) {
5732 Symbol* signature = st.signature();
5733 if (signature->starts_with("Q")) {
5734 Klass* klass = SystemDictionary::resolve_or_fail(signature,
5735 Handle(THREAD, ik->class_loader()),
5736 Handle(THREAD, ik->protection_domain()), true, CHECK);
5737 assert(klass != NULL, "Sanity check");
5738 assert(klass->access_flags().is_value_type(), "Value type expected");
5739 ik->set_value_field_klass(st.index(), klass);
5740 }
5741 }
5742
5743 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5744
5745 if (!is_internal()) {
5746 if (log_is_enabled(Info, class, load)) {
5747 ResourceMark rm;
5748 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5749 ik->print_class_load_logging(_loader_data, module_name, _stream);
5750 }
5751
5752 if (log_is_enabled(Debug, class, resolve)) {
5753 ResourceMark rm;
5754 // print out the superclass.
5755 const char * from = ik->external_name();
5756 if (ik->java_super() != NULL) {
5757 log_debug(class, resolve)("%s %s (super)",
5758 from,
5759 ik->java_super()->external_name());
5760 }
5761 // print out each of the interface classes referred to by this class.
5762 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5763 if (local_interfaces != NULL) {
5764 const int length = local_interfaces->length();
5765 for (int i = 0; i < length; i++) {
5766 const Klass* const k = local_interfaces->at(i);
5767 const char * to = k->external_name();
5768 log_debug(class, resolve)("%s %s (interface)", from, to);
5769 }
5770 }
5771 }
5772 }
5773
5774 TRACE_INIT_ID(ik);
5775
5776 // If we reach here, all is well.
5777 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5778 // in order for it to not be destroyed in the ClassFileParser destructor.
5779 set_klass_to_deallocate(NULL);
5780
5781 // it's official
5782 set_klass(ik);
5783
5784 debug_only(ik->verify();)
5785 }
5786
5787 // For an anonymous class that is in the unnamed package, move it to its host class's
5788 // package by prepending its host class's package name to its class name and setting
5789 // its _class_name field.
5790 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5791 ResourceMark rm(THREAD);
5792 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5793 "Anonymous class should not be in a package");
5794 const char* host_pkg_name =
5795 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5796
5797 if (host_pkg_name != NULL) {
5798 size_t host_pkg_len = strlen(host_pkg_name);
5799 int class_name_len = _class_name->utf8_length();
5800 char* new_anon_name =
5801 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5802 // Copy host package name and trailing /.
5803 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5804 new_anon_name[host_pkg_len] = '/';
5805 // Append anonymous class name. The anonymous class name can contain odd
5806 // characters. So, do a strncpy instead of using sprintf("%s...").
5807 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5808
5809 // Create a symbol and update the anonymous class name.
5810 _class_name = SymbolTable::new_symbol(new_anon_name,
5811 (int)host_pkg_len + 1 + class_name_len,
5812 CHECK);
5813 }
5814 }
5815
5816 // If the host class and the anonymous class are in the same package then do
5817 // nothing. If the anonymous class is in the unnamed package then move it to its
5818 // host's package. If the classes are in different packages then throw an IAE
5819 // exception.
5820 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5821 assert(_host_klass != NULL, "Expected an anonymous class");
5822
5823 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5824 _class_name->utf8_length(), '/');
5825 if (anon_last_slash == NULL) { // Unnamed package
5826 prepend_host_package_name(_host_klass, CHECK);
5827 } else {
5828 if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) {
5829 ResourceMark rm(THREAD);
5830 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5831 err_msg("Host class %s and anonymous class %s are in different packages",
5832 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5833 }
5834 }
5835 }
5836
5837 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5838 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5839 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5840 bool need_verify =
5841 // verifyAll
5842 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5843 // verifyRemote
5844 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5845 return !need_verify;
5846 }
5847
5848 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5849 Symbol* name,
5850 ClassLoaderData* loader_data,
5851 Handle protection_domain,
5852 const InstanceKlass* host_klass,
5853 GrowableArray<Handle>* cp_patches,
5854 Publicity pub_level,
5855 TRAPS) :
5856 _stream(stream),
5857 _requested_name(name),
5858 _loader_data(loader_data),
5859 _host_klass(host_klass),
5860 _cp_patches(cp_patches),
5861 _num_patched_klasses(0),
5862 _max_num_patched_klasses(0),
5863 _orig_cp_size(0),
5864 _first_patched_klass_resolved_index(0),
5865 _super_klass(),
5866 _cp(NULL),
5867 _fields(NULL),
5868 _methods(NULL),
5869 _inner_classes(NULL),
5870 _local_interfaces(NULL),
5871 _transitive_interfaces(NULL),
5872 _combined_annotations(NULL),
5873 _annotations(NULL),
5874 _type_annotations(NULL),
5875 _fields_annotations(NULL),
5876 _fields_type_annotations(NULL),
5877 _klass(NULL),
5878 _klass_to_deallocate(NULL),
5879 _parsed_annotations(NULL),
5880 _fac(NULL),
5881 _field_info(NULL),
5882 _method_ordering(NULL),
5883 _all_mirandas(NULL),
5884 _vtable_size(0),
5885 _itable_size(0),
5886 _num_miranda_methods(0),
5887 _rt(REF_NONE),
5888 _protection_domain(protection_domain),
5889 _access_flags(),
5890 _pub_level(pub_level),
5891 _bad_constant_seen(0),
5892 _synthetic_flag(false),
5893 _sde_length(false),
5894 _sde_buffer(NULL),
5895 _sourcefile_index(0),
5896 _generic_signature_index(0),
5897 _major_version(0),
5898 _minor_version(0),
5899 _this_class_index(0),
5900 _super_class_index(0),
5901 _itfs_len(0),
5902 _java_fields_count(0),
5903 _need_verify(false),
5904 _relax_verify(false),
5905 _has_nonstatic_concrete_methods(false),
5906 _declares_nonstatic_concrete_methods(false),
5907 _has_final_method(false),
5908 _has_finalizer(false),
5909 _has_empty_finalizer(false),
5910 _has_vanilla_constructor(false),
5911 _max_bootstrap_specifier_index(-1),
5912 _has_value_fields(false) {
5913
5914 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5915
5916 assert(THREAD->is_Java_thread(), "invariant");
5917 assert(_loader_data != NULL, "invariant");
5918 assert(stream != NULL, "invariant");
5919 assert(_stream != NULL, "invariant");
5920 assert(_stream->buffer() == _stream->current(), "invariant");
5921 assert(_class_name != NULL, "invariant");
5922 assert(0 == _access_flags.as_int(), "invariant");
5923
5924 // Figure out whether we can skip format checking (matching classic VM behavior)
5925 if (DumpSharedSpaces) {
5926 // verify == true means it's a 'remote' class (i.e., non-boot class)
5927 // Verification decision is based on BytecodeVerificationRemote flag
5928 // for those classes.
5929 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5930 BytecodeVerificationLocal;
5931 }
5932 else {
5933 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5934 stream->need_verify());
5935 }
5936 if (_cp_patches != NULL) {
5937 int len = _cp_patches->length();
5938 for (int i=0; i<len; i++) {
5939 if (has_cp_patch_at(i)) {
5940 Handle patch = cp_patch_at(i);
5941 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5942 // We need to append the names of the patched classes to the end of the constant pool,
5943 // because a patched class may have a Utf8 name that's not already included in the
5944 // original constant pool. These class names are used when patch_constant_pool()
5945 // calls patch_class().
5946 //
5947 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5948 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5949 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5950 _max_num_patched_klasses++;
5951 }
5952 }
5953 }
5954 }
5955
5956 // synch back verification state to stream
5957 stream->set_verify(_need_verify);
5958
5959 // Check if verification needs to be relaxed for this class file
5960 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5961 _relax_verify = relax_format_check_for(_loader_data);
5962
5963 parse_stream(stream, CHECK);
5964
5965 post_process_parsed_stream(stream, _cp, CHECK);
5966 }
5967
5968 void ClassFileParser::clear_class_metadata() {
5969 // metadata created before the instance klass is created. Must be
5970 // deallocated if classfile parsing returns an error.
5971 _cp = NULL;
5972 _fields = NULL;
5973 _methods = NULL;
5974 _inner_classes = NULL;
5975 _local_interfaces = NULL;
5976 _transitive_interfaces = NULL;
5977 _combined_annotations = NULL;
5978 _annotations = _type_annotations = NULL;
5979 _fields_annotations = _fields_type_annotations = NULL;
5980 }
5981
5982 // Destructor to clean up
5983 ClassFileParser::~ClassFileParser() {
5984 if (_cp != NULL) {
5985 MetadataFactory::free_metadata(_loader_data, _cp);
5986 }
5987 if (_fields != NULL) {
5988 MetadataFactory::free_array<u2>(_loader_data, _fields);
5989 }
5990
5991 if (_methods != NULL) {
5992 // Free methods
5993 InstanceKlass::deallocate_methods(_loader_data, _methods);
5994 }
5995
5996 // beware of the Universe::empty_blah_array!!
5997 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5998 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5999 }
6000
6001 // Free interfaces
6002 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6003 _local_interfaces, _transitive_interfaces);
6004
6005 if (_combined_annotations != NULL) {
6006 // After all annotations arrays have been created, they are installed into the
6007 // Annotations object that will be assigned to the InstanceKlass being created.
6008
6009 // Deallocate the Annotations object and the installed annotations arrays.
6010 _combined_annotations->deallocate_contents(_loader_data);
6011
6012 // If the _combined_annotations pointer is non-NULL,
6013 // then the other annotations fields should have been cleared.
6014 assert(_annotations == NULL, "Should have been cleared");
6015 assert(_type_annotations == NULL, "Should have been cleared");
6016 assert(_fields_annotations == NULL, "Should have been cleared");
6017 assert(_fields_type_annotations == NULL, "Should have been cleared");
6018 } else {
6019 // If the annotations arrays were not installed into the Annotations object,
6020 // then they have to be deallocated explicitly.
6021 MetadataFactory::free_array<u1>(_loader_data, _annotations);
6022 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6023 Annotations::free_contents(_loader_data, _fields_annotations);
6024 Annotations::free_contents(_loader_data, _fields_type_annotations);
6025 }
6026
6027 clear_class_metadata();
6028
6029 // deallocate the klass if already created. Don't directly deallocate, but add
6030 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6031 // at a safepoint.
6032 if (_klass_to_deallocate != NULL) {
6033 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6034 }
6035 }
6036
6037 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6038 TRAPS) {
6039
6040 assert(stream != NULL, "invariant");
6041 assert(_class_name != NULL, "invariant");
6042
6043 // BEGIN STREAM PARSING
6044 stream->guarantee_more(8, CHECK); // magic, major, minor
6045 // Magic value
6046 const u4 magic = stream->get_u4_fast();
6047 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6048 "Incompatible magic value %u in class file %s",
6049 magic, CHECK);
6050
6051 // Version numbers
6052 _minor_version = stream->get_u2_fast();
6053 _major_version = stream->get_u2_fast();
6054
6055 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6056 ResourceMark rm;
6057 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6058 _major_version, _minor_version, _class_name->as_C_string());
6059 Exceptions::fthrow(
6060 THREAD_AND_LOCATION,
6061 vmSymbols::java_lang_UnsupportedClassVersionError(),
6062 "Unsupported major.minor version for dump time %u.%u",
6063 _major_version,
6064 _minor_version);
6065 }
6066
6067 // Check version numbers - we check this even with verifier off
6068 if (!is_supported_version(_major_version, _minor_version)) {
6069 ResourceMark rm(THREAD);
6070 Exceptions::fthrow(
6071 THREAD_AND_LOCATION,
6072 vmSymbols::java_lang_UnsupportedClassVersionError(),
6073 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
6074 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
6075 _class_name->as_C_string(),
6076 _major_version,
6077 _minor_version,
6078 JAVA_MAX_SUPPORTED_VERSION,
6079 JAVA_MAX_SUPPORTED_MINOR_VERSION);
6080 return;
6081 }
6082
6083 stream->guarantee_more(3, CHECK); // length, first cp tag
6084 u2 cp_size = stream->get_u2_fast();
6085
6086 guarantee_property(
6087 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6088 cp_size, CHECK);
6089
6090 _orig_cp_size = cp_size;
6091 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6092 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6093 }
6094 cp_size += _max_num_patched_klasses;
6095
6096 _cp = ConstantPool::allocate(_loader_data,
6097 cp_size,
6098 CHECK);
6099
6100 ConstantPool* const cp = _cp;
6101
6102 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6103
6104 assert(cp_size == (const u2)cp->length(), "invariant");
6105
6106 // ACCESS FLAGS
6107 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6108
6109 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6110 // JVM_ACC_MODULE is defined in JDK-9 and later.
6111 if (_major_version >= JAVA_9_VERSION) {
6112 recognized_modifiers |= JVM_ACC_MODULE;
6113 }
6114 // JVM_ACC_VALUE is defined for class file version 53.1 and later
6115 if (supports_value_types()) {
6116 recognized_modifiers |= JVM_ACC_VALUE;
6117 }
6118
6119 // Access flags
6120 jint flags = stream->get_u2_fast() & recognized_modifiers;
6121
6122 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6123 // Set abstract bit for old class files for backward compatibility
6124 flags |= JVM_ACC_ABSTRACT;
6125 }
6126
6127 verify_legal_class_modifiers(flags, CHECK);
6128
6129 short bad_constant = class_bad_constant_seen();
6130 if (bad_constant != 0) {
6131 // Do not throw CFE until after the access_flags are checked because if
6132 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6133 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6134 }
6135
6136 _access_flags.set_flags(flags);
6137
6138 // This class and superclass
6139 _this_class_index = stream->get_u2_fast();
6140 check_property(
6141 (valid_cp_range(_this_class_index, cp_size) &&
6142 (cp->tag_at(_this_class_index).is_unresolved_klass() ||
6143 cp->tag_at(_this_class_index).is_unresolved_value_type())),
6144 "Invalid this class index %u in constant pool in class file %s",
6145 _this_class_index, CHECK);
6146
6147 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6148 assert(class_name_in_cp != NULL, "class_name can't be null");
6149
6150 // Update _class_name which could be null previously
6151 // to reflect the name in the constant pool
6152 _class_name = class_name_in_cp;
6153
6154 // Don't need to check whether this class name is legal or not.
6155 // It has been checked when constant pool is parsed.
6156 // However, make sure it is not an array type.
6157 if (_need_verify) {
6158 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
6159 "Bad class name in class file %s",
6160 CHECK);
6161 }
6162
6163 // Checks if name in class file matches requested name
6164 if (_requested_name != NULL && _requested_name != _class_name) {
6165 ResourceMark rm(THREAD);
6166 Exceptions::fthrow(
6167 THREAD_AND_LOCATION,
6168 vmSymbols::java_lang_NoClassDefFoundError(),
6169 "%s (wrong name: %s)",
6170 _class_name->as_C_string(),
6171 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6172 );
6173 return;
6174 }
6175
6176 // if this is an anonymous class fix up its name if it's in the unnamed
6177 // package. Otherwise, throw IAE if it is in a different package than
6178 // its host class.
6179 if (_host_klass != NULL) {
6180 fix_anonymous_class_name(CHECK);
6181 }
6182
6183 // Verification prevents us from creating names with dots in them, this
6184 // asserts that that's the case.
6185 assert(is_internal_format(_class_name), "external class name format used internally");
6186
6187 if (!is_internal()) {
6188 LogTarget(Debug, class, preorder) lt;
6189 if (lt.is_enabled()){
6190 ResourceMark rm(THREAD);
6191 LogStream ls(lt);
6192 ls.print("%s", _class_name->as_klass_external_name());
6193 if (stream->source() != NULL) {
6194 ls.print(" source: %s", stream->source());
6195 }
6196 ls.cr();
6197 }
6198
6199 #if INCLUDE_CDS
6200 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6201 // Only dump the classes that can be stored into CDS archive.
6202 // Anonymous classes such as generated LambdaForm classes are also not included.
6203 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6204 _host_klass == NULL) {
6205 oop class_loader = _loader_data->class_loader();
6206 ResourceMark rm(THREAD);
6207 // For the boot and platform class loaders, check if the class is not found in the
6208 // java runtime image. Additional check for the boot class loader is if the class
6209 // is not found in the boot loader's appended entries. This indicates that the class
6210 // is not useable during run time, such as the ones found in the --patch-module entries,
6211 // so it should not be included in the classlist file.
6212 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
6213 SystemDictionary::is_platform_class_loader(class_loader)) &&
6214 !ClassLoader::is_jrt(stream->source())) {
6215 tty->print_cr("skip writing class %s from source %s to classlist file",
6216 _class_name->as_C_string(), stream->source());
6217 } else {
6218 classlist_file->print_cr("%s", _class_name->as_C_string());
6219 classlist_file->flush();
6220 }
6221 }
6222 }
6223 #endif
6224 }
6225
6226 // SUPERKLASS
6227 _super_class_index = stream->get_u2_fast();
6228 _super_klass = parse_super_class(cp,
6229 _super_class_index,
6230 _need_verify,
6231 CHECK);
6232
6233 // Interfaces
6234 _itfs_len = stream->get_u2_fast();
6235 parse_interfaces(stream,
6236 _itfs_len,
6237 cp,
6238 &_has_nonstatic_concrete_methods,
6239 CHECK);
6240
6241 assert(_local_interfaces != NULL, "invariant");
6242
6243 // Fields (offsets are filled in later)
6244 _fac = new FieldAllocationCount();
6245 parse_fields(stream,
6246 _access_flags.is_interface(),
6247 _fac,
6248 cp,
6249 cp_size,
6250 &_java_fields_count,
6251 CHECK);
6252
6253 assert(_fields != NULL, "invariant");
6254
6255 // Methods
6256 AccessFlags promoted_flags;
6257 parse_methods(stream,
6258 _access_flags.is_interface(),
6259 &promoted_flags,
6260 &_has_final_method,
6261 &_declares_nonstatic_concrete_methods,
6262 CHECK);
6263
6264 assert(_methods != NULL, "invariant");
6265
6266 // promote flags from parse_methods() to the klass' flags
6267 _access_flags.add_promoted_flags(promoted_flags.as_int());
6268
6269 if (_declares_nonstatic_concrete_methods) {
6270 _has_nonstatic_concrete_methods = true;
6271 }
6272
6273 // Additional attributes/annotations
6274 _parsed_annotations = new ClassAnnotationCollector();
6275 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6276
6277 assert(_inner_classes != NULL, "invariant");
6278
6279 // Finalize the Annotations metadata object,
6280 // now that all annotation arrays have been created.
6281 create_combined_annotations(CHECK);
6282
6283 // Make sure this is the end of class file stream
6284 guarantee_property(stream->at_eos(),
6285 "Extra bytes at the end of class file %s",
6286 CHECK);
6287
6288 // all bytes in stream read and parsed
6289 }
6290
6291 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6292 ConstantPool* cp,
6293 TRAPS) {
6294 assert(stream != NULL, "invariant");
6295 assert(stream->at_eos(), "invariant");
6296 assert(cp != NULL, "invariant");
6297 assert(_loader_data != NULL, "invariant");
6298
6299 if (_class_name == vmSymbols::java_lang_Object()) {
6300 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6301 "java.lang.Object cannot implement an interface in class file %s",
6302 CHECK);
6303 }
6304 // We check super class after class file is parsed and format is checked
6305 if (_super_class_index > 0 && NULL ==_super_klass) {
6306 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6307 if (_access_flags.is_interface()) {
6308 // Before attempting to resolve the superclass, check for class format
6309 // errors not checked yet.
6310 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6311 "Interfaces must have java.lang.Object as superclass in class file %s",
6312 CHECK);
6313 }
6314 Handle loader(THREAD, _loader_data->class_loader());
6315 _super_klass = (const InstanceKlass*)
6316 SystemDictionary::resolve_super_or_fail(_class_name,
6317 super_class_name,
6318 loader,
6319 _protection_domain,
6320 true,
6321 CHECK);
6322 }
6323
6324 if (_super_klass != NULL) {
6325 if (_super_klass->has_nonstatic_concrete_methods()) {
6326 _has_nonstatic_concrete_methods = true;
6327 }
6328
6329 if (_super_klass->is_interface()) {
6330 ResourceMark rm(THREAD);
6331 Exceptions::fthrow(
6332 THREAD_AND_LOCATION,
6333 vmSymbols::java_lang_IncompatibleClassChangeError(),
6334 "class %s has interface %s as super class",
6335 _class_name->as_klass_external_name(),
6336 _super_klass->external_name()
6337 );
6338 return;
6339 }
6340
6341 // For a java/lang/__Value super class, the class inheriting, must be a value class
6342 if ((EnableValhalla || EnableMVT) &&
6343 _super_klass->name() == vmSymbols::java_lang____Value()) {
6344 guarantee_property((_access_flags.get_flags() & JVM_ACC_VALUE) != 0,
6345 "Only a value class can inherit from java/lang/__Value",
6346 CHECK);
6347 }
6348
6349 // For a value class, only java/lang/__Value is an acceptable super class
6350 if ((EnableValhalla || EnableMVT) &&
6351 _access_flags.get_flags() & JVM_ACC_VALUE) {
6352 guarantee_property(_super_klass->name() == vmSymbols::java_lang____Value(),
6353 "Value class can only inherit java/lang/__Value",
6354 CHECK);
6355 }
6356
6357 // Make sure super class is not final
6358 if (_super_klass->is_final()
6359 && !(_super_klass->name() == vmSymbols::java_lang____Value()
6360 && (_access_flags.get_flags() & JVM_ACC_VALUE))) {
6361 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6362 }
6363 }
6364
6365 // Compute the transitive list of all unique interfaces implemented by this class
6366 _transitive_interfaces =
6367 compute_transitive_interfaces(_super_klass,
6368 _local_interfaces,
6369 _loader_data,
6370 CHECK);
6371
6372 assert(_transitive_interfaces != NULL, "invariant");
6373
6374 // sort methods
6375 _method_ordering = sort_methods(_methods);
6376
6377 _all_mirandas = new GrowableArray<Method*>(20);
6378
6379 Handle loader(THREAD, _loader_data->class_loader());
6380 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6381 &_num_miranda_methods,
6382 _all_mirandas,
6383 _super_klass,
6384 _methods,
6385 _access_flags,
6386 _major_version,
6387 loader,
6388 _class_name,
6389 _local_interfaces,
6390 CHECK);
6391
6392 // Size of Java itable (in words)
6393 _itable_size = _access_flags.is_interface() ? 0 :
6394 klassItable::compute_itable_size(_transitive_interfaces);
6395
6396 assert(_fac != NULL, "invariant");
6397 assert(_parsed_annotations != NULL, "invariant");
6398
6399 _field_info = new FieldLayoutInfo();
6400 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6401
6402 // Compute reference typ
6403 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6404
6405 }
6406
6407 void ClassFileParser::set_klass(InstanceKlass* klass) {
6408
6409 #ifdef ASSERT
6410 if (klass != NULL) {
6411 assert(NULL == _klass, "leaking?");
6412 }
6413 #endif
6414
6415 _klass = klass;
6416 }
6417
6418 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6419
6420 #ifdef ASSERT
6421 if (klass != NULL) {
6422 assert(NULL == _klass_to_deallocate, "leaking?");
6423 }
6424 #endif
6425
6426 _klass_to_deallocate = klass;
6427 }
6428
6429 // Caller responsible for ResourceMark
6430 // clone stream with rewound position
6431 const ClassFileStream* ClassFileParser::clone_stream() const {
6432 assert(_stream != NULL, "invariant");
6433
6434 return _stream->clone();
6435 }
6436
6437 bool ClassFileParser::is_value_capable_class() const {
6438 return _parsed_annotations->is_value_capable_class();
6439 }
6440
6441 // ----------------------------------------------------------------------------
6442 // debugging
6443
6444 #ifdef ASSERT
6445
6446 // return true if class_name contains no '.' (internal format is '/')
6447 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6448 if (class_name != NULL) {
6449 ResourceMark rm;
6450 char* name = class_name->as_C_string();
6451 return strchr(name, '.') == NULL;
6452 } else {
6453 return true;
6454 }
6455 }
6456
6457 #endif