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 }
2186
2187 #define MAX_ARGS_SIZE 255
2188 #define MAX_CODE_SIZE 65535
2189 #define INITIAL_MAX_LVT_NUMBER 256
2190
2191 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2192 *
2193 * Rules for LVT's and LVTT's are:
2194 * - There can be any number of LVT's and LVTT's.
2195 * - If there are n LVT's, it is the same as if there was just
2196 * one LVT containing all the entries from the n LVT's.
2197 * - There may be no more than one LVT entry per local variable.
2198 * Two LVT entries are 'equal' if these fields are the same:
2199 * start_pc, length, name, slot
2200 * - There may be no more than one LVTT entry per each LVT entry.
2201 * Each LVTT entry has to match some LVT entry.
2202 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2203 */
2204 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2205 int lvt_cnt,
2206 u2* const localvariable_table_length,
2207 const unsafe_u2** const localvariable_table_start,
2208 int lvtt_cnt,
2209 u2* const localvariable_type_table_length,
2210 const unsafe_u2** const localvariable_type_table_start,
2211 TRAPS) {
2212
2213 ResourceMark rm(THREAD);
2214
2215 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2216 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2217
2218 LVT_HashTable* const table = new LVT_HashTable();
2219
2220 // To fill LocalVariableTable in
2221 const Classfile_LVT_Element* cf_lvt;
2222 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2223
2224 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2225 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2226 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2227 copy_lvt_element(&cf_lvt[idx], lvt);
2228 // If no duplicates, add LVT elem in hashtable.
2229 if (table->put(*lvt, lvt) == false
2230 && _need_verify
2231 && _major_version >= JAVA_1_5_VERSION) {
2232 classfile_parse_error("Duplicated LocalVariableTable attribute "
2233 "entry for '%s' in class file %s",
2234 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2235 CHECK);
2236 }
2237 }
2238 }
2239
2240 // To merge LocalVariableTable and LocalVariableTypeTable
2241 const Classfile_LVT_Element* cf_lvtt;
2242 LocalVariableTableElement lvtt_elem;
2243
2244 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2245 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2246 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2247 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2248 LocalVariableTableElement** entry = table->get(lvtt_elem);
2249 if (entry == NULL) {
2250 if (_need_verify) {
2251 classfile_parse_error("LVTT entry for '%s' in class file %s "
2252 "does not match any LVT entry",
2253 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2254 CHECK);
2255 }
2256 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2257 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2258 "entry for '%s' in class file %s",
2259 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2260 CHECK);
2261 } else {
2262 // to add generic signatures into LocalVariableTable
2263 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2264 }
2265 }
2266 }
2267 }
2268
2269
2270 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2271 const u1* runtime_visible_annotations,
2272 int runtime_visible_annotations_length,
2273 const u1* runtime_invisible_annotations,
2274 int runtime_invisible_annotations_length,
2275 const u1* runtime_visible_parameter_annotations,
2276 int runtime_visible_parameter_annotations_length,
2277 const u1* runtime_invisible_parameter_annotations,
2278 int runtime_invisible_parameter_annotations_length,
2279 const u1* runtime_visible_type_annotations,
2280 int runtime_visible_type_annotations_length,
2281 const u1* runtime_invisible_type_annotations,
2282 int runtime_invisible_type_annotations_length,
2283 const u1* annotation_default,
2284 int annotation_default_length,
2285 TRAPS) {
2286
2287 AnnotationArray* a;
2288
2289 if (runtime_visible_annotations_length +
2290 runtime_invisible_annotations_length > 0) {
2291 a = assemble_annotations(runtime_visible_annotations,
2292 runtime_visible_annotations_length,
2293 runtime_invisible_annotations,
2294 runtime_invisible_annotations_length,
2295 CHECK);
2296 cm->set_method_annotations(a);
2297 }
2298
2299 if (runtime_visible_parameter_annotations_length +
2300 runtime_invisible_parameter_annotations_length > 0) {
2301 a = assemble_annotations(runtime_visible_parameter_annotations,
2302 runtime_visible_parameter_annotations_length,
2303 runtime_invisible_parameter_annotations,
2304 runtime_invisible_parameter_annotations_length,
2305 CHECK);
2306 cm->set_parameter_annotations(a);
2307 }
2308
2309 if (annotation_default_length > 0) {
2310 a = assemble_annotations(annotation_default,
2311 annotation_default_length,
2312 NULL,
2313 0,
2314 CHECK);
2315 cm->set_default_annotations(a);
2316 }
2317
2318 if (runtime_visible_type_annotations_length +
2319 runtime_invisible_type_annotations_length > 0) {
2320 a = assemble_annotations(runtime_visible_type_annotations,
2321 runtime_visible_type_annotations_length,
2322 runtime_invisible_type_annotations,
2323 runtime_invisible_type_annotations_length,
2324 CHECK);
2325 cm->set_type_annotations(a);
2326 }
2327 }
2328
2329
2330 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2331 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2332 // Method* to save footprint, so we only know the size of the resulting Method* when the
2333 // entire method attribute is parsed.
2334 //
2335 // The promoted_flags parameter is used to pass relevant access_flags
2336 // from the method back up to the containing klass. These flag values
2337 // are added to klass's access_flags.
2338
2339 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2340 bool is_interface,
2341 const ConstantPool* cp,
2342 AccessFlags* const promoted_flags,
2343 TRAPS) {
2344 assert(cfs != NULL, "invariant");
2345 assert(cp != NULL, "invariant");
2346 assert(promoted_flags != NULL, "invariant");
2347
2348 ResourceMark rm(THREAD);
2349 // Parse fixed parts:
2350 // access_flags, name_index, descriptor_index, attributes_count
2351 cfs->guarantee_more(8, CHECK_NULL);
2352
2353 int flags = cfs->get_u2_fast();
2354 const u2 name_index = cfs->get_u2_fast();
2355 const int cp_size = cp->length();
2356 check_property(
2357 valid_symbol_at(name_index),
2358 "Illegal constant pool index %u for method name in class file %s",
2359 name_index, CHECK_NULL);
2360 const Symbol* const name = cp->symbol_at(name_index);
2361 verify_legal_method_name(name, CHECK_NULL);
2362
2363 const u2 signature_index = cfs->get_u2_fast();
2364 guarantee_property(
2365 valid_symbol_at(signature_index),
2366 "Illegal constant pool index %u for method signature in class file %s",
2367 signature_index, CHECK_NULL);
2368 const Symbol* const signature = cp->symbol_at(signature_index);
2369
2370 if (name == vmSymbols::class_initializer_name()) {
2371 // We ignore the other access flags for a valid class initializer.
2372 // (JVM Spec 2nd ed., chapter 4.6)
2373 if (_major_version < 51) { // backward compatibility
2374 flags = JVM_ACC_STATIC;
2375 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2376 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2377 } else {
2378 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2379 }
2380 } else {
2381 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2382 }
2383
2384 if (name == vmSymbols::object_initializer_name() && is_interface) {
2385 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2386 }
2387
2388 int args_size = -1; // only used when _need_verify is true
2389 if (_need_verify) {
2390 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2391 verify_legal_method_signature(name, signature, CHECK_NULL);
2392 if (args_size > MAX_ARGS_SIZE) {
2393 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2394 }
2395 }
2396
2397 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2398
2399 // Default values for code and exceptions attribute elements
2400 u2 max_stack = 0;
2401 u2 max_locals = 0;
2402 u4 code_length = 0;
2403 const u1* code_start = 0;
2404 u2 exception_table_length = 0;
2405 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2406 Array<int>* exception_handlers = Universe::the_empty_int_array();
2407 u2 checked_exceptions_length = 0;
2408 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2409 CompressedLineNumberWriteStream* linenumber_table = NULL;
2410 int linenumber_table_length = 0;
2411 int total_lvt_length = 0;
2412 u2 lvt_cnt = 0;
2413 u2 lvtt_cnt = 0;
2414 bool lvt_allocated = false;
2415 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2416 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2417 u2* localvariable_table_length = NULL;
2418 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2419 u2* localvariable_type_table_length = NULL;
2420 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2421 int method_parameters_length = -1;
2422 const u1* method_parameters_data = NULL;
2423 bool method_parameters_seen = false;
2424 bool parsed_code_attribute = false;
2425 bool parsed_checked_exceptions_attribute = false;
2426 bool parsed_stackmap_attribute = false;
2427 // stackmap attribute - JDK1.5
2428 const u1* stackmap_data = NULL;
2429 int stackmap_data_length = 0;
2430 u2 generic_signature_index = 0;
2431 MethodAnnotationCollector parsed_annotations;
2432 const u1* runtime_visible_annotations = NULL;
2433 int runtime_visible_annotations_length = 0;
2434 const u1* runtime_invisible_annotations = NULL;
2435 int runtime_invisible_annotations_length = 0;
2436 const u1* runtime_visible_parameter_annotations = NULL;
2437 int runtime_visible_parameter_annotations_length = 0;
2438 const u1* runtime_invisible_parameter_annotations = NULL;
2439 int runtime_invisible_parameter_annotations_length = 0;
2440 const u1* runtime_visible_type_annotations = NULL;
2441 int runtime_visible_type_annotations_length = 0;
2442 const u1* runtime_invisible_type_annotations = NULL;
2443 int runtime_invisible_type_annotations_length = 0;
2444 bool runtime_invisible_annotations_exists = false;
2445 bool runtime_invisible_type_annotations_exists = false;
2446 bool runtime_invisible_parameter_annotations_exists = false;
2447 const u1* annotation_default = NULL;
2448 int annotation_default_length = 0;
2449
2450 // Parse code and exceptions attribute
2451 u2 method_attributes_count = cfs->get_u2_fast();
2452 while (method_attributes_count--) {
2453 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2454 const u2 method_attribute_name_index = cfs->get_u2_fast();
2455 const u4 method_attribute_length = cfs->get_u4_fast();
2456 check_property(
2457 valid_symbol_at(method_attribute_name_index),
2458 "Invalid method attribute name index %u in class file %s",
2459 method_attribute_name_index, CHECK_NULL);
2460
2461 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2462 if (method_attribute_name == vmSymbols::tag_code()) {
2463 // Parse Code attribute
2464 if (_need_verify) {
2465 guarantee_property(
2466 !access_flags.is_native() && !access_flags.is_abstract(),
2467 "Code attribute in native or abstract methods in class file %s",
2468 CHECK_NULL);
2469 }
2470 if (parsed_code_attribute) {
2471 classfile_parse_error("Multiple Code attributes in class file %s",
2472 CHECK_NULL);
2473 }
2474 parsed_code_attribute = true;
2475
2476 // Stack size, locals size, and code size
2477 if (_major_version == 45 && _minor_version <= 2) {
2478 cfs->guarantee_more(4, CHECK_NULL);
2479 max_stack = cfs->get_u1_fast();
2480 max_locals = cfs->get_u1_fast();
2481 code_length = cfs->get_u2_fast();
2482 } else {
2483 cfs->guarantee_more(8, CHECK_NULL);
2484 max_stack = cfs->get_u2_fast();
2485 max_locals = cfs->get_u2_fast();
2486 code_length = cfs->get_u4_fast();
2487 }
2488 if (_need_verify) {
2489 guarantee_property(args_size <= max_locals,
2490 "Arguments can't fit into locals in class file %s",
2491 CHECK_NULL);
2492 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2493 "Invalid method Code length %u in class file %s",
2494 code_length, CHECK_NULL);
2495 }
2496 // Code pointer
2497 code_start = cfs->current();
2498 assert(code_start != NULL, "null code start");
2499 cfs->guarantee_more(code_length, CHECK_NULL);
2500 cfs->skip_u1_fast(code_length);
2501
2502 // Exception handler table
2503 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2504 exception_table_length = cfs->get_u2_fast();
2505 if (exception_table_length > 0) {
2506 exception_table_start = parse_exception_table(cfs,
2507 code_length,
2508 exception_table_length,
2509 CHECK_NULL);
2510 }
2511
2512 // Parse additional attributes in code attribute
2513 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2514 u2 code_attributes_count = cfs->get_u2_fast();
2515
2516 unsigned int calculated_attribute_length = 0;
2517
2518 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2519 calculated_attribute_length =
2520 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2521 } else {
2522 // max_stack, locals and length are smaller in pre-version 45.2 classes
2523 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2524 }
2525 calculated_attribute_length +=
2526 code_length +
2527 sizeof(exception_table_length) +
2528 sizeof(code_attributes_count) +
2529 exception_table_length *
2530 ( sizeof(u2) + // start_pc
2531 sizeof(u2) + // end_pc
2532 sizeof(u2) + // handler_pc
2533 sizeof(u2) ); // catch_type_index
2534
2535 while (code_attributes_count--) {
2536 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2537 const u2 code_attribute_name_index = cfs->get_u2_fast();
2538 const u4 code_attribute_length = cfs->get_u4_fast();
2539 calculated_attribute_length += code_attribute_length +
2540 sizeof(code_attribute_name_index) +
2541 sizeof(code_attribute_length);
2542 check_property(valid_symbol_at(code_attribute_name_index),
2543 "Invalid code attribute name index %u in class file %s",
2544 code_attribute_name_index,
2545 CHECK_NULL);
2546 if (LoadLineNumberTables &&
2547 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2548 // Parse and compress line number table
2549 parse_linenumber_table(code_attribute_length,
2550 code_length,
2551 &linenumber_table,
2552 CHECK_NULL);
2553
2554 } else if (LoadLocalVariableTables &&
2555 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2556 // Parse local variable table
2557 if (!lvt_allocated) {
2558 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2559 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2560 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2561 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2562 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2563 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2564 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2565 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2566 lvt_allocated = true;
2567 }
2568 if (lvt_cnt == max_lvt_cnt) {
2569 max_lvt_cnt <<= 1;
2570 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2571 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2572 }
2573 localvariable_table_start[lvt_cnt] =
2574 parse_localvariable_table(cfs,
2575 code_length,
2576 max_locals,
2577 code_attribute_length,
2578 &localvariable_table_length[lvt_cnt],
2579 false, // is not LVTT
2580 CHECK_NULL);
2581 total_lvt_length += localvariable_table_length[lvt_cnt];
2582 lvt_cnt++;
2583 } else if (LoadLocalVariableTypeTables &&
2584 _major_version >= JAVA_1_5_VERSION &&
2585 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2586 if (!lvt_allocated) {
2587 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2588 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2589 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2590 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2591 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2592 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2593 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2594 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2595 lvt_allocated = true;
2596 }
2597 // Parse local variable type table
2598 if (lvtt_cnt == max_lvtt_cnt) {
2599 max_lvtt_cnt <<= 1;
2600 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2601 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2602 }
2603 localvariable_type_table_start[lvtt_cnt] =
2604 parse_localvariable_table(cfs,
2605 code_length,
2606 max_locals,
2607 code_attribute_length,
2608 &localvariable_type_table_length[lvtt_cnt],
2609 true, // is LVTT
2610 CHECK_NULL);
2611 lvtt_cnt++;
2612 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2613 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2614 // Stack map is only needed by the new verifier in JDK1.5.
2615 if (parsed_stackmap_attribute) {
2616 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2617 }
2618 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2619 stackmap_data_length = code_attribute_length;
2620 parsed_stackmap_attribute = true;
2621 } else {
2622 // Skip unknown attributes
2623 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2624 }
2625 }
2626 // check method attribute length
2627 if (_need_verify) {
2628 guarantee_property(method_attribute_length == calculated_attribute_length,
2629 "Code segment has wrong length in class file %s",
2630 CHECK_NULL);
2631 }
2632 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2633 // Parse Exceptions attribute
2634 if (parsed_checked_exceptions_attribute) {
2635 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2636 CHECK_NULL);
2637 }
2638 parsed_checked_exceptions_attribute = true;
2639 checked_exceptions_start =
2640 parse_checked_exceptions(cfs,
2641 &checked_exceptions_length,
2642 method_attribute_length,
2643 CHECK_NULL);
2644 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2645 // reject multiple method parameters
2646 if (method_parameters_seen) {
2647 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2648 CHECK_NULL);
2649 }
2650 method_parameters_seen = true;
2651 method_parameters_length = cfs->get_u1_fast();
2652 const u2 real_length = (method_parameters_length * 4u) + 1u;
2653 if (method_attribute_length != real_length) {
2654 classfile_parse_error(
2655 "Invalid MethodParameters method attribute length %u in class file",
2656 method_attribute_length, CHECK_NULL);
2657 }
2658 method_parameters_data = cfs->current();
2659 cfs->skip_u2_fast(method_parameters_length);
2660 cfs->skip_u2_fast(method_parameters_length);
2661 // ignore this attribute if it cannot be reflected
2662 if (!SystemDictionary::Parameter_klass_loaded())
2663 method_parameters_length = -1;
2664 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2665 if (method_attribute_length != 0) {
2666 classfile_parse_error(
2667 "Invalid Synthetic method attribute length %u in class file %s",
2668 method_attribute_length, CHECK_NULL);
2669 }
2670 // Should we check that there hasn't already been a synthetic attribute?
2671 access_flags.set_is_synthetic();
2672 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2673 if (method_attribute_length != 0) {
2674 classfile_parse_error(
2675 "Invalid Deprecated method attribute length %u in class file %s",
2676 method_attribute_length, CHECK_NULL);
2677 }
2678 } else if (_major_version >= JAVA_1_5_VERSION) {
2679 if (method_attribute_name == vmSymbols::tag_signature()) {
2680 if (generic_signature_index != 0) {
2681 classfile_parse_error(
2682 "Multiple Signature attributes for method in class file %s",
2683 CHECK_NULL);
2684 }
2685 if (method_attribute_length != 2) {
2686 classfile_parse_error(
2687 "Invalid Signature attribute length %u in class file %s",
2688 method_attribute_length, CHECK_NULL);
2689 }
2690 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2691 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2692 if (runtime_visible_annotations != NULL) {
2693 classfile_parse_error(
2694 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2695 CHECK_NULL);
2696 }
2697 runtime_visible_annotations_length = method_attribute_length;
2698 runtime_visible_annotations = cfs->current();
2699 assert(runtime_visible_annotations != NULL, "null visible annotations");
2700 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2701 parse_annotations(cp,
2702 runtime_visible_annotations,
2703 runtime_visible_annotations_length,
2704 &parsed_annotations,
2705 _loader_data,
2706 CHECK_NULL);
2707 cfs->skip_u1_fast(runtime_visible_annotations_length);
2708 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2709 if (runtime_invisible_annotations_exists) {
2710 classfile_parse_error(
2711 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2712 CHECK_NULL);
2713 }
2714 runtime_invisible_annotations_exists = true;
2715 if (PreserveAllAnnotations) {
2716 runtime_invisible_annotations_length = method_attribute_length;
2717 runtime_invisible_annotations = cfs->current();
2718 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2719 }
2720 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2721 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2722 if (runtime_visible_parameter_annotations != NULL) {
2723 classfile_parse_error(
2724 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2725 CHECK_NULL);
2726 }
2727 runtime_visible_parameter_annotations_length = method_attribute_length;
2728 runtime_visible_parameter_annotations = cfs->current();
2729 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2730 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2731 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2732 if (runtime_invisible_parameter_annotations_exists) {
2733 classfile_parse_error(
2734 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2735 CHECK_NULL);
2736 }
2737 runtime_invisible_parameter_annotations_exists = true;
2738 if (PreserveAllAnnotations) {
2739 runtime_invisible_parameter_annotations_length = method_attribute_length;
2740 runtime_invisible_parameter_annotations = cfs->current();
2741 assert(runtime_invisible_parameter_annotations != NULL,
2742 "null invisible parameter annotations");
2743 }
2744 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2745 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2746 if (annotation_default != NULL) {
2747 classfile_parse_error(
2748 "Multiple AnnotationDefault attributes for method in class file %s",
2749 CHECK_NULL);
2750 }
2751 annotation_default_length = method_attribute_length;
2752 annotation_default = cfs->current();
2753 assert(annotation_default != NULL, "null annotation default");
2754 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2755 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2756 if (runtime_visible_type_annotations != NULL) {
2757 classfile_parse_error(
2758 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2759 CHECK_NULL);
2760 }
2761 runtime_visible_type_annotations_length = method_attribute_length;
2762 runtime_visible_type_annotations = cfs->current();
2763 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2764 // No need for the VM to parse Type annotations
2765 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2766 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2767 if (runtime_invisible_type_annotations_exists) {
2768 classfile_parse_error(
2769 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2770 CHECK_NULL);
2771 } else {
2772 runtime_invisible_type_annotations_exists = true;
2773 }
2774 if (PreserveAllAnnotations) {
2775 runtime_invisible_type_annotations_length = method_attribute_length;
2776 runtime_invisible_type_annotations = cfs->current();
2777 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2778 }
2779 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2780 } else {
2781 // Skip unknown attributes
2782 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2783 }
2784 } else {
2785 // Skip unknown attributes
2786 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2787 }
2788 }
2789
2790 if (linenumber_table != NULL) {
2791 linenumber_table->write_terminator();
2792 linenumber_table_length = linenumber_table->position();
2793 }
2794
2795 // Make sure there's at least one Code attribute in non-native/non-abstract method
2796 if (_need_verify) {
2797 guarantee_property(access_flags.is_native() ||
2798 access_flags.is_abstract() ||
2799 parsed_code_attribute,
2800 "Absent Code attribute in method that is not native or abstract in class file %s",
2801 CHECK_NULL);
2802 }
2803
2804 // All sizing information for a Method* is finally available, now create it
2805 InlineTableSizes sizes(
2806 total_lvt_length,
2807 linenumber_table_length,
2808 exception_table_length,
2809 checked_exceptions_length,
2810 method_parameters_length,
2811 generic_signature_index,
2812 runtime_visible_annotations_length +
2813 runtime_invisible_annotations_length,
2814 runtime_visible_parameter_annotations_length +
2815 runtime_invisible_parameter_annotations_length,
2816 runtime_visible_type_annotations_length +
2817 runtime_invisible_type_annotations_length,
2818 annotation_default_length,
2819 0);
2820
2821 Method* const m = Method::allocate(_loader_data,
2822 code_length,
2823 access_flags,
2824 &sizes,
2825 ConstMethod::NORMAL,
2826 CHECK_NULL);
2827
2828 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2829
2830 // Fill in information from fixed part (access_flags already set)
2831 m->set_constants(_cp);
2832 m->set_name_index(name_index);
2833 m->set_signature_index(signature_index);
2834
2835 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2836 m->constMethod()->set_result_type(rtf.type());
2837
2838 if (args_size >= 0) {
2839 m->set_size_of_parameters(args_size);
2840 } else {
2841 m->compute_size_of_parameters(THREAD);
2842 }
2843 #ifdef ASSERT
2844 if (args_size >= 0) {
2845 m->compute_size_of_parameters(THREAD);
2846 assert(args_size == m->size_of_parameters(), "");
2847 }
2848 #endif
2849
2850 // Fill in code attribute information
2851 m->set_max_stack(max_stack);
2852 m->set_max_locals(max_locals);
2853 if (stackmap_data != NULL) {
2854 m->constMethod()->copy_stackmap_data(_loader_data,
2855 (u1*)stackmap_data,
2856 stackmap_data_length,
2857 CHECK_NULL);
2858 }
2859
2860 // Copy byte codes
2861 m->set_code((u1*)code_start);
2862
2863 // Copy line number table
2864 if (linenumber_table != NULL) {
2865 memcpy(m->compressed_linenumber_table(),
2866 linenumber_table->buffer(),
2867 linenumber_table_length);
2868 }
2869
2870 // Copy exception table
2871 if (exception_table_length > 0) {
2872 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2873 m->exception_table_start(),
2874 exception_table_length * sizeof(ExceptionTableElement),
2875 sizeof(u2));
2876 }
2877
2878 // Copy method parameters
2879 if (method_parameters_length > 0) {
2880 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2881 for (int i = 0; i < method_parameters_length; i++) {
2882 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2883 method_parameters_data += 2;
2884 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2885 method_parameters_data += 2;
2886 }
2887 }
2888
2889 // Copy checked exceptions
2890 if (checked_exceptions_length > 0) {
2891 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2892 m->checked_exceptions_start(),
2893 checked_exceptions_length * sizeof(CheckedExceptionElement),
2894 sizeof(u2));
2895 }
2896
2897 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2898 if (total_lvt_length > 0) {
2899 promoted_flags->set_has_localvariable_table();
2900 copy_localvariable_table(m->constMethod(),
2901 lvt_cnt,
2902 localvariable_table_length,
2903 localvariable_table_start,
2904 lvtt_cnt,
2905 localvariable_type_table_length,
2906 localvariable_type_table_start,
2907 CHECK_NULL);
2908 }
2909
2910 if (parsed_annotations.has_any_annotations())
2911 parsed_annotations.apply_to(m);
2912
2913 // Copy annotations
2914 copy_method_annotations(m->constMethod(),
2915 runtime_visible_annotations,
2916 runtime_visible_annotations_length,
2917 runtime_invisible_annotations,
2918 runtime_invisible_annotations_length,
2919 runtime_visible_parameter_annotations,
2920 runtime_visible_parameter_annotations_length,
2921 runtime_invisible_parameter_annotations,
2922 runtime_invisible_parameter_annotations_length,
2923 runtime_visible_type_annotations,
2924 runtime_visible_type_annotations_length,
2925 runtime_invisible_type_annotations,
2926 runtime_invisible_type_annotations_length,
2927 annotation_default,
2928 annotation_default_length,
2929 CHECK_NULL);
2930
2931 if (name == vmSymbols::finalize_method_name() &&
2932 signature == vmSymbols::void_method_signature()) {
2933 if (m->is_empty_method()) {
2934 _has_empty_finalizer = true;
2935 } else {
2936 _has_finalizer = true;
2937 }
2938 }
2939 if (name == vmSymbols::object_initializer_name() &&
2940 signature == vmSymbols::void_method_signature() &&
2941 m->is_vanilla_constructor()) {
2942 _has_vanilla_constructor = true;
2943 }
2944
2945 NOT_PRODUCT(m->verify());
2946 return m;
2947 }
2948
2949
2950 // The promoted_flags parameter is used to pass relevant access_flags
2951 // from the methods back up to the containing klass. These flag values
2952 // are added to klass's access_flags.
2953 // Side-effects: populates the _methods field in the parser
2954 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2955 bool is_interface,
2956 AccessFlags* promoted_flags,
2957 bool* has_final_method,
2958 bool* declares_nonstatic_concrete_methods,
2959 TRAPS) {
2960 assert(cfs != NULL, "invariant");
2961 assert(promoted_flags != NULL, "invariant");
2962 assert(has_final_method != NULL, "invariant");
2963 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2964
2965 assert(NULL == _methods, "invariant");
2966
2967 cfs->guarantee_more(2, CHECK); // length
2968 const u2 length = cfs->get_u2_fast();
2969 if (length == 0) {
2970 _methods = Universe::the_empty_method_array();
2971 } else {
2972 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2973 length,
2974 NULL,
2975 CHECK);
2976
2977 for (int index = 0; index < length; index++) {
2978 Method* method = parse_method(cfs,
2979 is_interface,
2980 _cp,
2981 promoted_flags,
2982 CHECK);
2983
2984 if (method->is_final()) {
2985 *has_final_method = true;
2986 }
2987 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2988 // used for interface initialization, and default method inheritance analysis
2989 if (is_interface && !(*declares_nonstatic_concrete_methods)
2990 && !method->is_abstract() && !method->is_static()) {
2991 *declares_nonstatic_concrete_methods = true;
2992 }
2993 _methods->at_put(index, method);
2994 }
2995
2996 if (_need_verify && length > 1) {
2997 // Check duplicated methods
2998 ResourceMark rm(THREAD);
2999 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3000 THREAD, NameSigHash*, HASH_ROW_SIZE);
3001 initialize_hashtable(names_and_sigs);
3002 bool dup = false;
3003 const Symbol* name = NULL;
3004 const Symbol* sig = NULL;
3005 {
3006 debug_only(NoSafepointVerifier nsv;)
3007 for (int i = 0; i < length; i++) {
3008 const Method* const m = _methods->at(i);
3009 name = m->name();
3010 sig = m->signature();
3011 // If no duplicates, add name/signature in hashtable names_and_sigs.
3012 if (!put_after_lookup(name, sig, names_and_sigs)) {
3013 dup = true;
3014 break;
3015 }
3016 }
3017 }
3018 if (dup) {
3019 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3020 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3021 }
3022 }
3023 }
3024 }
3025
3026 static const intArray* sort_methods(Array<Method*>* methods) {
3027 const int length = methods->length();
3028 // If JVMTI original method ordering or sharing is enabled we have to
3029 // remember the original class file ordering.
3030 // We temporarily use the vtable_index field in the Method* to store the
3031 // class file index, so we can read in after calling qsort.
3032 // Put the method ordering in the shared archive.
3033 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3034 for (int index = 0; index < length; index++) {
3035 Method* const m = methods->at(index);
3036 assert(!m->valid_vtable_index(), "vtable index should not be set");
3037 m->set_vtable_index(index);
3038 }
3039 }
3040 // Sort method array by ascending method name (for faster lookups & vtable construction)
3041 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3042 Method::sort_methods(methods);
3043
3044 intArray* method_ordering = NULL;
3045 // If JVMTI original method ordering or sharing is enabled construct int
3046 // array remembering the original ordering
3047 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3048 method_ordering = new intArray(length, length, -1);
3049 for (int index = 0; index < length; index++) {
3050 Method* const m = methods->at(index);
3051 const int old_index = m->vtable_index();
3052 assert(old_index >= 0 && old_index < length, "invalid method index");
3053 method_ordering->at_put(index, old_index);
3054 m->set_vtable_index(Method::invalid_vtable_index);
3055 }
3056 }
3057 return method_ordering;
3058 }
3059
3060 // Parse generic_signature attribute for methods and fields
3061 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3062 TRAPS) {
3063 assert(cfs != NULL, "invariant");
3064
3065 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3066 const u2 generic_signature_index = cfs->get_u2_fast();
3067 check_property(
3068 valid_symbol_at(generic_signature_index),
3069 "Invalid Signature attribute at constant pool index %u in class file %s",
3070 generic_signature_index, CHECK_0);
3071 return generic_signature_index;
3072 }
3073
3074 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3075 TRAPS) {
3076
3077 assert(cfs != NULL, "invariant");
3078
3079 cfs->guarantee_more(2, CHECK); // sourcefile_index
3080 const u2 sourcefile_index = cfs->get_u2_fast();
3081 check_property(
3082 valid_symbol_at(sourcefile_index),
3083 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3084 sourcefile_index, CHECK);
3085 set_class_sourcefile_index(sourcefile_index);
3086 }
3087
3088 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3089 int length,
3090 TRAPS) {
3091 assert(cfs != NULL, "invariant");
3092
3093 const u1* const sde_buffer = cfs->current();
3094 assert(sde_buffer != NULL, "null sde buffer");
3095
3096 // Don't bother storing it if there is no way to retrieve it
3097 if (JvmtiExport::can_get_source_debug_extension()) {
3098 assert((length+1) > length, "Overflow checking");
3099 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3100 for (int i = 0; i < length; i++) {
3101 sde[i] = sde_buffer[i];
3102 }
3103 sde[length] = '\0';
3104 set_class_sde_buffer((const char*)sde, length);
3105 }
3106 // Got utf8 string, set stream position forward
3107 cfs->skip_u1(length, CHECK);
3108 }
3109
3110
3111 // Inner classes can be static, private or protected (classic VM does this)
3112 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3113 JVM_ACC_PRIVATE | \
3114 JVM_ACC_PROTECTED | \
3115 JVM_ACC_STATIC \
3116 )
3117
3118 // Return number of classes in the inner classes attribute table
3119 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3120 const u1* const inner_classes_attribute_start,
3121 bool parsed_enclosingmethod_attribute,
3122 u2 enclosing_method_class_index,
3123 u2 enclosing_method_method_index,
3124 TRAPS) {
3125 const u1* const current_mark = cfs->current();
3126 u2 length = 0;
3127 if (inner_classes_attribute_start != NULL) {
3128 cfs->set_current(inner_classes_attribute_start);
3129 cfs->guarantee_more(2, CHECK_0); // length
3130 length = cfs->get_u2_fast();
3131 }
3132
3133 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3134 // method data:
3135 // [inner_class_info_index,
3136 // outer_class_info_index,
3137 // inner_name_index,
3138 // inner_class_access_flags,
3139 // ...
3140 // enclosing_method_class_index,
3141 // enclosing_method_method_index]
3142 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3143 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3144 _inner_classes = inner_classes;
3145
3146 int index = 0;
3147 const int cp_size = _cp->length();
3148 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3149 for (int n = 0; n < length; n++) {
3150 // Inner class index
3151 const u2 inner_class_info_index = cfs->get_u2_fast();
3152 check_property(
3153 (valid_klass_reference_at(inner_class_info_index) ||
3154 ((EnableValhalla || EnableMVT) && valid_value_type_reference_at(inner_class_info_index))),
3155 "inner_class_info_index %u has bad constant type in class file %s",
3156 inner_class_info_index, CHECK_0);
3157 // Outer class index
3158 const u2 outer_class_info_index = cfs->get_u2_fast();
3159 check_property(
3160 outer_class_info_index == 0 ||
3161 valid_klass_reference_at(outer_class_info_index),
3162 "outer_class_info_index %u has bad constant type in class file %s",
3163 outer_class_info_index, CHECK_0);
3164 // Inner class name
3165 const u2 inner_name_index = cfs->get_u2_fast();
3166 check_property(
3167 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3168 "inner_name_index %u has bad constant type in class file %s",
3169 inner_name_index, CHECK_0);
3170 if (_need_verify) {
3171 guarantee_property(inner_class_info_index != outer_class_info_index,
3172 "Class is both outer and inner class in class file %s", CHECK_0);
3173 }
3174
3175 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3176 // JVM_ACC_MODULE is defined in JDK-9 and later.
3177 if (_major_version >= JAVA_9_VERSION) {
3178 recognized_modifiers |= JVM_ACC_MODULE;
3179 }
3180 // JVM_ACC_VALUE is defined for class file version 53.1 and later
3181 if (supports_value_types()) {
3182 recognized_modifiers |= JVM_ACC_VALUE;
3183 }
3184
3185 // Access flags
3186 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3187
3188 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3189 // Set abstract bit for old class files for backward compatibility
3190 flags |= JVM_ACC_ABSTRACT;
3191 }
3192 verify_legal_class_modifiers(flags, CHECK_0);
3193 AccessFlags inner_access_flags(flags);
3194
3195 inner_classes->at_put(index++, inner_class_info_index);
3196 inner_classes->at_put(index++, outer_class_info_index);
3197 inner_classes->at_put(index++, inner_name_index);
3198 inner_classes->at_put(index++, inner_access_flags.as_short());
3199 }
3200
3201 // 4347400: make sure there's no duplicate entry in the classes array
3202 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3203 for(int i = 0; i < length * 4; i += 4) {
3204 for(int j = i + 4; j < length * 4; j += 4) {
3205 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3206 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3207 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3208 inner_classes->at(i+3) != inner_classes->at(j+3)),
3209 "Duplicate entry in InnerClasses in class file %s",
3210 CHECK_0);
3211 }
3212 }
3213 }
3214
3215 // Set EnclosingMethod class and method indexes.
3216 if (parsed_enclosingmethod_attribute) {
3217 inner_classes->at_put(index++, enclosing_method_class_index);
3218 inner_classes->at_put(index++, enclosing_method_method_index);
3219 }
3220 assert(index == size, "wrong size");
3221
3222 // Restore buffer's current position.
3223 cfs->set_current(current_mark);
3224
3225 return length;
3226 }
3227
3228 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3229 set_class_synthetic_flag(true);
3230 }
3231
3232 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3233 assert(cfs != NULL, "invariant");
3234
3235 const u2 signature_index = cfs->get_u2(CHECK);
3236 check_property(
3237 valid_symbol_at(signature_index),
3238 "Invalid constant pool index %u in Signature attribute in class file %s",
3239 signature_index, CHECK);
3240 set_class_generic_signature_index(signature_index);
3241 }
3242
3243 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3244 ConstantPool* cp,
3245 u4 attribute_byte_length,
3246 TRAPS) {
3247 assert(cfs != NULL, "invariant");
3248 assert(cp != NULL, "invariant");
3249
3250 const u1* const current_start = cfs->current();
3251
3252 guarantee_property(attribute_byte_length >= sizeof(u2),
3253 "Invalid BootstrapMethods attribute length %u in class file %s",
3254 attribute_byte_length,
3255 CHECK);
3256
3257 cfs->guarantee_more(attribute_byte_length, CHECK);
3258
3259 const int attribute_array_length = cfs->get_u2_fast();
3260
3261 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3262 "Short length on BootstrapMethods in class file %s",
3263 CHECK);
3264
3265
3266 // The attribute contains a counted array of counted tuples of shorts,
3267 // represending bootstrap specifiers:
3268 // length*{bootstrap_method_index, argument_count*{argument_index}}
3269 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3270 // operand_count = number of shorts in attr, except for leading length
3271
3272 // The attribute is copied into a short[] array.
3273 // The array begins with a series of short[2] pairs, one for each tuple.
3274 const int index_size = (attribute_array_length * 2);
3275
3276 Array<u2>* const operands =
3277 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3278
3279 // Eagerly assign operands so they will be deallocated with the constant
3280 // pool if there is an error.
3281 cp->set_operands(operands);
3282
3283 int operand_fill_index = index_size;
3284 const int cp_size = cp->length();
3285
3286 for (int n = 0; n < attribute_array_length; n++) {
3287 // Store a 32-bit offset into the header of the operand array.
3288 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3289
3290 // Read a bootstrap specifier.
3291 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3292 const u2 bootstrap_method_index = cfs->get_u2_fast();
3293 const u2 argument_count = cfs->get_u2_fast();
3294 check_property(
3295 valid_cp_range(bootstrap_method_index, cp_size) &&
3296 cp->tag_at(bootstrap_method_index).is_method_handle(),
3297 "bootstrap_method_index %u has bad constant type in class file %s",
3298 bootstrap_method_index,
3299 CHECK);
3300
3301 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3302 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3303 CHECK);
3304
3305 operands->at_put(operand_fill_index++, bootstrap_method_index);
3306 operands->at_put(operand_fill_index++, argument_count);
3307
3308 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3309 for (int j = 0; j < argument_count; j++) {
3310 const u2 argument_index = cfs->get_u2_fast();
3311 check_property(
3312 valid_cp_range(argument_index, cp_size) &&
3313 cp->tag_at(argument_index).is_loadable_constant(),
3314 "argument_index %u has bad constant type in class file %s",
3315 argument_index,
3316 CHECK);
3317 operands->at_put(operand_fill_index++, argument_index);
3318 }
3319 }
3320 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3321 "Bad length on BootstrapMethods in class file %s",
3322 CHECK);
3323 }
3324
3325 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3326 ConstantPool* cp,
3327 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3328 TRAPS) {
3329 assert(cfs != NULL, "invariant");
3330 assert(cp != NULL, "invariant");
3331 assert(parsed_annotations != NULL, "invariant");
3332
3333 // Set inner classes attribute to default sentinel
3334 _inner_classes = Universe::the_empty_short_array();
3335 cfs->guarantee_more(2, CHECK); // attributes_count
3336 u2 attributes_count = cfs->get_u2_fast();
3337 bool parsed_sourcefile_attribute = false;
3338 bool parsed_innerclasses_attribute = false;
3339 bool parsed_enclosingmethod_attribute = false;
3340 bool parsed_bootstrap_methods_attribute = false;
3341 const u1* runtime_visible_annotations = NULL;
3342 int runtime_visible_annotations_length = 0;
3343 const u1* runtime_invisible_annotations = NULL;
3344 int runtime_invisible_annotations_length = 0;
3345 const u1* runtime_visible_type_annotations = NULL;
3346 int runtime_visible_type_annotations_length = 0;
3347 const u1* runtime_invisible_type_annotations = NULL;
3348 int runtime_invisible_type_annotations_length = 0;
3349 bool runtime_invisible_type_annotations_exists = false;
3350 bool runtime_invisible_annotations_exists = false;
3351 bool parsed_source_debug_ext_annotations_exist = false;
3352 const u1* inner_classes_attribute_start = NULL;
3353 u4 inner_classes_attribute_length = 0;
3354 u2 enclosing_method_class_index = 0;
3355 u2 enclosing_method_method_index = 0;
3356 // Iterate over attributes
3357 while (attributes_count--) {
3358 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3359 const u2 attribute_name_index = cfs->get_u2_fast();
3360 const u4 attribute_length = cfs->get_u4_fast();
3361 check_property(
3362 valid_symbol_at(attribute_name_index),
3363 "Attribute name has bad constant pool index %u in class file %s",
3364 attribute_name_index, CHECK);
3365 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3366 if (tag == vmSymbols::tag_source_file()) {
3367 // Check for SourceFile tag
3368 if (_need_verify) {
3369 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3370 }
3371 if (parsed_sourcefile_attribute) {
3372 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3373 } else {
3374 parsed_sourcefile_attribute = true;
3375 }
3376 parse_classfile_sourcefile_attribute(cfs, CHECK);
3377 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3378 // Check for SourceDebugExtension tag
3379 if (parsed_source_debug_ext_annotations_exist) {
3380 classfile_parse_error(
3381 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3382 }
3383 parsed_source_debug_ext_annotations_exist = true;
3384 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3385 } else if (tag == vmSymbols::tag_inner_classes()) {
3386 // Check for InnerClasses tag
3387 if (parsed_innerclasses_attribute) {
3388 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3389 } else {
3390 parsed_innerclasses_attribute = true;
3391 }
3392 inner_classes_attribute_start = cfs->current();
3393 inner_classes_attribute_length = attribute_length;
3394 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3395 } else if (tag == vmSymbols::tag_synthetic()) {
3396 // Check for Synthetic tag
3397 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3398 if (attribute_length != 0) {
3399 classfile_parse_error(
3400 "Invalid Synthetic classfile attribute length %u in class file %s",
3401 attribute_length, CHECK);
3402 }
3403 parse_classfile_synthetic_attribute(CHECK);
3404 } else if (tag == vmSymbols::tag_deprecated()) {
3405 // Check for Deprecatd tag - 4276120
3406 if (attribute_length != 0) {
3407 classfile_parse_error(
3408 "Invalid Deprecated classfile attribute length %u in class file %s",
3409 attribute_length, CHECK);
3410 }
3411 } else if (_major_version >= JAVA_1_5_VERSION) {
3412 if (tag == vmSymbols::tag_signature()) {
3413 if (_generic_signature_index != 0) {
3414 classfile_parse_error(
3415 "Multiple Signature attributes in class file %s", CHECK);
3416 }
3417 if (attribute_length != 2) {
3418 classfile_parse_error(
3419 "Wrong Signature attribute length %u in class file %s",
3420 attribute_length, CHECK);
3421 }
3422 parse_classfile_signature_attribute(cfs, CHECK);
3423 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3424 if (runtime_visible_annotations != NULL) {
3425 classfile_parse_error(
3426 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3427 }
3428 runtime_visible_annotations_length = attribute_length;
3429 runtime_visible_annotations = cfs->current();
3430 assert(runtime_visible_annotations != NULL, "null visible annotations");
3431 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3432 parse_annotations(cp,
3433 runtime_visible_annotations,
3434 runtime_visible_annotations_length,
3435 parsed_annotations,
3436 _loader_data,
3437 CHECK);
3438 cfs->skip_u1_fast(runtime_visible_annotations_length);
3439 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3440 if (runtime_invisible_annotations_exists) {
3441 classfile_parse_error(
3442 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3443 }
3444 runtime_invisible_annotations_exists = true;
3445 if (PreserveAllAnnotations) {
3446 runtime_invisible_annotations_length = attribute_length;
3447 runtime_invisible_annotations = cfs->current();
3448 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3449 }
3450 cfs->skip_u1(attribute_length, CHECK);
3451 } else if (tag == vmSymbols::tag_enclosing_method()) {
3452 if (parsed_enclosingmethod_attribute) {
3453 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3454 } else {
3455 parsed_enclosingmethod_attribute = true;
3456 }
3457 guarantee_property(attribute_length == 4,
3458 "Wrong EnclosingMethod attribute length %u in class file %s",
3459 attribute_length, CHECK);
3460 cfs->guarantee_more(4, CHECK); // class_index, method_index
3461 enclosing_method_class_index = cfs->get_u2_fast();
3462 enclosing_method_method_index = cfs->get_u2_fast();
3463 if (enclosing_method_class_index == 0) {
3464 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3465 }
3466 // Validate the constant pool indices and types
3467 check_property(valid_klass_reference_at(enclosing_method_class_index),
3468 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3469 if (enclosing_method_method_index != 0 &&
3470 (!cp->is_within_bounds(enclosing_method_method_index) ||
3471 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3472 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3473 }
3474 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3475 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3476 if (parsed_bootstrap_methods_attribute) {
3477 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3478 }
3479 parsed_bootstrap_methods_attribute = true;
3480 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3481 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3482 if (runtime_visible_type_annotations != NULL) {
3483 classfile_parse_error(
3484 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3485 }
3486 runtime_visible_type_annotations_length = attribute_length;
3487 runtime_visible_type_annotations = cfs->current();
3488 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3489 // No need for the VM to parse Type annotations
3490 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3491 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3492 if (runtime_invisible_type_annotations_exists) {
3493 classfile_parse_error(
3494 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3495 } else {
3496 runtime_invisible_type_annotations_exists = true;
3497 }
3498 if (PreserveAllAnnotations) {
3499 runtime_invisible_type_annotations_length = attribute_length;
3500 runtime_invisible_type_annotations = cfs->current();
3501 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3502 }
3503 cfs->skip_u1(attribute_length, CHECK);
3504 } else {
3505 // Unknown attribute
3506 cfs->skip_u1(attribute_length, CHECK);
3507 }
3508 } else {
3509 // Unknown attribute
3510 cfs->skip_u1(attribute_length, CHECK);
3511 }
3512 }
3513 _annotations = assemble_annotations(runtime_visible_annotations,
3514 runtime_visible_annotations_length,
3515 runtime_invisible_annotations,
3516 runtime_invisible_annotations_length,
3517 CHECK);
3518 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3519 runtime_visible_type_annotations_length,
3520 runtime_invisible_type_annotations,
3521 runtime_invisible_type_annotations_length,
3522 CHECK);
3523
3524 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3525 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3526 cfs,
3527 inner_classes_attribute_start,
3528 parsed_innerclasses_attribute,
3529 enclosing_method_class_index,
3530 enclosing_method_method_index,
3531 CHECK);
3532 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3533 guarantee_property(
3534 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3535 "Wrong InnerClasses attribute length in class file %s", CHECK);
3536 }
3537 }
3538
3539 if (_max_bootstrap_specifier_index >= 0) {
3540 guarantee_property(parsed_bootstrap_methods_attribute,
3541 "Missing BootstrapMethods attribute in class file %s", CHECK);
3542 }
3543 }
3544
3545 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3546 assert(k != NULL, "invariant");
3547
3548 if (_synthetic_flag)
3549 k->set_is_synthetic();
3550 if (_sourcefile_index != 0) {
3551 k->set_source_file_name_index(_sourcefile_index);
3552 }
3553 if (_generic_signature_index != 0) {
3554 k->set_generic_signature_index(_generic_signature_index);
3555 }
3556 if (_sde_buffer != NULL) {
3557 k->set_source_debug_extension(_sde_buffer, _sde_length);
3558 }
3559 }
3560
3561 // Create the Annotations object that will
3562 // hold the annotations array for the Klass.
3563 void ClassFileParser::create_combined_annotations(TRAPS) {
3564 if (_annotations == NULL &&
3565 _type_annotations == NULL &&
3566 _fields_annotations == NULL &&
3567 _fields_type_annotations == NULL) {
3568 // Don't create the Annotations object unnecessarily.
3569 return;
3570 }
3571
3572 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3573 annotations->set_class_annotations(_annotations);
3574 annotations->set_class_type_annotations(_type_annotations);
3575 annotations->set_fields_annotations(_fields_annotations);
3576 annotations->set_fields_type_annotations(_fields_type_annotations);
3577
3578 // This is the Annotations object that will be
3579 // assigned to InstanceKlass being constructed.
3580 _combined_annotations = annotations;
3581
3582 // The annotations arrays below has been transfered the
3583 // _combined_annotations so these fields can now be cleared.
3584 _annotations = NULL;
3585 _type_annotations = NULL;
3586 _fields_annotations = NULL;
3587 _fields_type_annotations = NULL;
3588 }
3589
3590 // Transfer ownership of metadata allocated to the InstanceKlass.
3591 void ClassFileParser::apply_parsed_class_metadata(
3592 InstanceKlass* this_klass,
3593 int java_fields_count, TRAPS) {
3594 assert(this_klass != NULL, "invariant");
3595
3596 _cp->set_pool_holder(this_klass);
3597 this_klass->set_constants(_cp);
3598 this_klass->set_fields(_fields, java_fields_count);
3599 this_klass->set_methods(_methods);
3600 this_klass->set_inner_classes(_inner_classes);
3601 this_klass->set_local_interfaces(_local_interfaces);
3602 this_klass->set_transitive_interfaces(_transitive_interfaces);
3603 this_klass->set_annotations(_combined_annotations);
3604
3605 // Clear out these fields so they don't get deallocated by the destructor
3606 clear_class_metadata();
3607 }
3608
3609 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3610 int runtime_visible_annotations_length,
3611 const u1* const runtime_invisible_annotations,
3612 int runtime_invisible_annotations_length,
3613 TRAPS) {
3614 AnnotationArray* annotations = NULL;
3615 if (runtime_visible_annotations != NULL ||
3616 runtime_invisible_annotations != NULL) {
3617 annotations = MetadataFactory::new_array<u1>(_loader_data,
3618 runtime_visible_annotations_length +
3619 runtime_invisible_annotations_length,
3620 CHECK_(annotations));
3621 if (runtime_visible_annotations != NULL) {
3622 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3623 annotations->at_put(i, runtime_visible_annotations[i]);
3624 }
3625 }
3626 if (runtime_invisible_annotations != NULL) {
3627 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3628 int append = runtime_visible_annotations_length+i;
3629 annotations->at_put(append, runtime_invisible_annotations[i]);
3630 }
3631 }
3632 }
3633 return annotations;
3634 }
3635
3636 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3637 const int super_class_index,
3638 const bool need_verify,
3639 TRAPS) {
3640 assert(cp != NULL, "invariant");
3641 const InstanceKlass* super_klass = NULL;
3642
3643 if (super_class_index == 0) {
3644 check_property(_class_name == vmSymbols::java_lang_Object()
3645 || (_access_flags.get_flags() & JVM_ACC_VALUE),
3646 "Invalid superclass index %u in class file %s",
3647 super_class_index,
3648 CHECK_NULL);
3649 } else {
3650 check_property((valid_klass_reference_at(super_class_index) ||
3651 ((EnableValhalla || EnableMVT) && valid_value_type_reference_at(super_class_index))),
3652 "Invalid superclass index %u in class file %s",
3653 super_class_index,
3654 CHECK_NULL);
3655 // The class name should be legal because it is checked when parsing constant pool.
3656 // However, make sure it is not an array type.
3657 bool is_array = false;
3658 if (cp->tag_at(super_class_index).is_klass() || cp->tag_at(super_class_index).is_value_type()) {
3659 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3660 if (need_verify)
3661 is_array = super_klass->is_array_klass();
3662 } else if (need_verify) {
3663 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3664 }
3665 if (need_verify) {
3666 guarantee_property(!is_array,
3667 "Bad superclass name in class file %s", CHECK_NULL);
3668 }
3669 }
3670 return super_klass;
3671 }
3672
3673 #ifndef PRODUCT
3674 static void print_field_layout(const Symbol* name,
3675 Array<u2>* fields,
3676 const constantPoolHandle& cp,
3677 int instance_size,
3678 int instance_fields_start,
3679 int instance_fields_end,
3680 int static_fields_end) {
3681
3682 assert(name != NULL, "invariant");
3683
3684 tty->print("%s: field layout\n", name->as_klass_external_name());
3685 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3686 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3687 if (!fs.access_flags().is_static()) {
3688 tty->print(" @%3d \"%s\" %s\n",
3689 fs.offset(),
3690 fs.name()->as_klass_external_name(),
3691 fs.signature()->as_klass_external_name());
3692 }
3693 }
3694 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3695 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3696 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3697 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3698 if (fs.access_flags().is_static()) {
3699 tty->print(" @%3d \"%s\" %s\n",
3700 fs.offset(),
3701 fs.name()->as_klass_external_name(),
3702 fs.signature()->as_klass_external_name());
3703 }
3704 }
3705 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3706 tty->print("\n");
3707 }
3708 #endif
3709
3710 // Values needed for oopmap and InstanceKlass creation
3711 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3712 public:
3713 OopMapBlocksBuilder* oop_map_blocks;
3714 int instance_size;
3715 int nonstatic_field_size;
3716 int static_field_size;
3717 bool has_nonstatic_fields;
3718 };
3719
3720 // Utility to collect and compact oop maps during layout
3721 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj {
3722 public:
3723 OopMapBlock* nonstatic_oop_maps;
3724 unsigned int nonstatic_oop_map_count;
3725 unsigned int max_nonstatic_oop_maps;
3726
3727 public:
3728 OopMapBlocksBuilder(unsigned int max_blocks, TRAPS) {
3729 max_nonstatic_oop_maps = max_blocks;
3730 nonstatic_oop_map_count = 0;
3731 if (max_blocks == 0) {
3732 nonstatic_oop_maps = NULL;
3733 } else {
3734 nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD(
3735 THREAD, OopMapBlock, max_nonstatic_oop_maps);
3736 memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3737 }
3738 }
3739
3740 OopMapBlock* last_oop_map() const {
3741 assert(nonstatic_oop_map_count > 0, "Has no oop maps");
3742 return nonstatic_oop_maps + (nonstatic_oop_map_count - 1);
3743 }
3744
3745 // addition of super oop maps
3746 void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3747 assert(nof_blocks && nonstatic_oop_map_count == 0 &&
3748 nof_blocks <= max_nonstatic_oop_maps, "invariant");
3749
3750 memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3751 nonstatic_oop_map_count += nof_blocks;
3752 }
3753
3754 // collection of oops
3755 void add(int offset, int count) {
3756 if (nonstatic_oop_map_count == 0) {
3757 nonstatic_oop_map_count++;
3758 }
3759 OopMapBlock* nonstatic_oop_map = last_oop_map();
3760 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3761 nonstatic_oop_map->set_offset(offset);
3762 nonstatic_oop_map->set_count(count);
3763 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3764 nonstatic_oop_map->increment_count(count);
3765 } else { // Need a new one...
3766 nonstatic_oop_map_count++;
3767 assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check");
3768 nonstatic_oop_map = last_oop_map();
3769 nonstatic_oop_map->set_offset(offset);
3770 nonstatic_oop_map->set_count(count);
3771 }
3772 }
3773
3774 // general purpose copy, e.g. into allocated instanceKlass
3775 void copy(OopMapBlock* dst) {
3776 if (nonstatic_oop_map_count != 0) {
3777 memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count);
3778 }
3779 }
3780
3781 // Sort and compact adjacent blocks
3782 void compact(TRAPS) {
3783 if (nonstatic_oop_map_count <= 1) {
3784 return;
3785 }
3786 /*
3787 * Since field layout sneeks in oops before values, we will be able to condense
3788 * blocks. There is potential to compact between super, own refs and values
3789 * containing refs.
3790 *
3791 * Currently compaction is slightly limited due to values being 8 byte aligned.
3792 * This may well change: FixMe if doesn't, the code below is fairly general purpose
3793 * and maybe it doesn't need to be.
3794 */
3795 qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock),
3796 (_sort_Fn)OopMapBlock::compare_offset);
3797 if (nonstatic_oop_map_count < 2) {
3798 return;
3799 }
3800
3801 //Make a temp copy, and iterate through and copy back into the orig
3802 ResourceMark rm(THREAD);
3803 OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock,
3804 nonstatic_oop_map_count);
3805 OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count;
3806 copy(oop_maps_copy);
3807 OopMapBlock* nonstatic_oop_map = nonstatic_oop_maps;
3808 unsigned int new_count = 1;
3809 oop_maps_copy++;
3810 while(oop_maps_copy < oop_maps_copy_end) {
3811 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3812 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3813 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3814 } else {
3815 nonstatic_oop_map++;
3816 new_count++;
3817 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3818 nonstatic_oop_map->set_count(oop_maps_copy->count());
3819 }
3820 oop_maps_copy++;
3821 }
3822 assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?");
3823 nonstatic_oop_map_count = new_count;
3824 }
3825
3826 void print_on(outputStream* st) const {
3827 st->print_cr(" OopMapBlocks: %3d /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps);
3828 if (nonstatic_oop_map_count > 0) {
3829 OopMapBlock* map = nonstatic_oop_maps;
3830 OopMapBlock* last_map = last_oop_map();
3831 assert(map <= last_map, "Last less than first");
3832 while (map <= last_map) {
3833 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3834 map->offset() + map->offset_span() - heapOopSize, map->count());
3835 map++;
3836 }
3837 }
3838 }
3839
3840 void print_value_on(outputStream* st) const {
3841 print_on(st);
3842 }
3843
3844 };
3845
3846 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
3847 const char* msg,
3848 const Symbol* name,
3849 const Symbol* sig) const {
3850
3851 ResourceMark rm(THREAD);
3852 if (name == NULL || sig == NULL) {
3853 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3854 vmSymbols::java_lang_ClassFormatError(),
3855 "class: %s - %s", _class_name->as_C_string(), msg);
3856 }
3857 else {
3858 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3859 vmSymbols::java_lang_ClassFormatError(),
3860 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
3861 _class_name->as_C_string(), msg);
3862 }
3863 }
3864
3865 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3866 void ClassFileParser::layout_fields(ConstantPool* cp,
3867 const FieldAllocationCount* fac,
3868 const ClassAnnotationCollector* parsed_annotations,
3869 FieldLayoutInfo* info,
3870 TRAPS) {
3871
3872 assert(cp != NULL, "invariant");
3873
3874 // Field size and offset computation
3875 int nonstatic_field_size = _super_klass == NULL ? 0 :
3876 _super_klass->nonstatic_field_size();
3877 int next_nonstatic_valuetype_offset = 0;
3878 int first_nonstatic_valuetype_offset = 0;
3879
3880 // Fields that are value types are handled differently depending if they are static or not:
3881 // - static fields are oops
3882 // - non-static fields are embedded
3883
3884 // Count the contended fields by type.
3885 //
3886 // We ignore static fields, because @Contended is not supported for them.
3887 // The layout code below will also ignore the static fields.
3888 int nonstatic_contended_count = 0;
3889 FieldAllocationCount fac_contended;
3890 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3891 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3892 if (fs.is_contended()) {
3893 fac_contended.count[atype]++;
3894 if (!fs.access_flags().is_static()) {
3895 nonstatic_contended_count++;
3896 }
3897 }
3898 }
3899
3900
3901 // Calculate the starting byte offsets
3902 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3903 // Value types in static fields are nor embedded, they are handled with oops
3904 int next_static_double_offset = next_static_oop_offset +
3905 ((fac->count[STATIC_OOP] + fac->count[STATIC_VALUETYPE]) * heapOopSize);
3906 if ( fac->count[STATIC_DOUBLE] &&
3907 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3908 Universe::field_type_should_be_aligned(T_LONG)) ) {
3909 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3910 }
3911
3912 int next_static_word_offset = next_static_double_offset +
3913 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3914 int next_static_short_offset = next_static_word_offset +
3915 ((fac->count[STATIC_WORD]) * BytesPerInt);
3916 int next_static_byte_offset = next_static_short_offset +
3917 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3918
3919 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3920 nonstatic_field_size * heapOopSize;
3921
3922 // First field of value types is aligned on a long boundary in order to ease
3923 // in-lining of value types (with header removal) in packed arrays and
3924 // flatten value types
3925 int initial_value_type_padding = 0;
3926 if (is_value_type() || is_value_capable_class()) {
3927 int old = nonstatic_fields_start;
3928 nonstatic_fields_start = align_up(nonstatic_fields_start, BytesPerLong);
3929 initial_value_type_padding = nonstatic_fields_start - old;
3930 }
3931
3932 int next_nonstatic_field_offset = nonstatic_fields_start;
3933
3934 const bool is_contended_class = parsed_annotations->is_contended();
3935
3936 // Class is contended, pad before all the fields
3937 if (is_contended_class) {
3938 next_nonstatic_field_offset += ContendedPaddingWidth;
3939 }
3940
3941 // Temporary value types restrictions
3942 if (is_value_type() || is_value_capable_class()) {
3943 if (is_contended_class) {
3944 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
3945 return;
3946 }
3947 }
3948
3949 // Compute the non-contended fields count.
3950 // The packing code below relies on these counts to determine if some field
3951 // can be squeezed into the alignment gap. Contended fields are obviously
3952 // exempt from that.
3953 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3954 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3955 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3956 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3957 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3958
3959 int static_value_type_count = 0;
3960 int nonstatic_value_type_count = 0;
3961 int* nonstatic_value_type_indexes = NULL;
3962 Klass** nonstatic_value_type_klasses = NULL;
3963 unsigned int value_type_oop_map_count = 0;
3964
3965 int max_nonstatic_value_type = fac->count[NONSTATIC_VALUETYPE] + 1;
3966
3967 nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int,
3968 max_nonstatic_value_type);
3969 for (int i = 0; i < max_nonstatic_value_type; i++) {
3970 nonstatic_value_type_indexes[i] = -1;
3971 }
3972 nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*,
3973 max_nonstatic_value_type);
3974
3975 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3976 if (fs.allocation_type() == STATIC_VALUETYPE) {
3977 static_value_type_count++;
3978 } else if (fs.allocation_type() == NONSTATIC_VALUETYPE) {
3979 Symbol* signature = fs.signature();
3980 Klass* klass = SystemDictionary::resolve_or_fail(signature,
3981 Handle(THREAD, _loader_data->class_loader()),
3982 _protection_domain, true, CHECK);
3983 assert(klass != NULL, "Sanity check");
3984 assert(klass->access_flags().is_value_type(), "Value type expected");
3985 nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index();
3986 nonstatic_value_type_klasses[nonstatic_value_type_count] = klass;
3987 nonstatic_value_type_count++;
3988
3989 ValueKlass* vklass = ValueKlass::cast(klass);
3990 if (vklass->contains_oops()) {
3991 value_type_oop_map_count += vklass->nonstatic_oop_map_count();
3992 }
3993 }
3994 }
3995
3996 // Total non-static fields count, including every contended field
3997 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3998 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3999 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_VALUETYPE];
4000
4001 const bool super_has_nonstatic_fields =
4002 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4003 const bool has_nonstatic_fields =
4004 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4005 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
4006
4007 if (is_value_type() && (!has_nonstatic_fields)) {
4008 // There are a number of fixes required throughout the type system and JIT
4009 if (class_name() != vmSymbols::java_lang____Value()) {
4010 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support zero instance size yet");
4011 }
4012 }
4013
4014 // Prepare list of oops for oop map generation.
4015 //
4016 // "offset" and "count" lists are describing the set of contiguous oop
4017 // regions. offset[i] is the start of the i-th region, which then has
4018 // count[i] oops following. Before we know how many regions are required,
4019 // we pessimistically allocate the maps to fit all the oops into the
4020 // distinct regions.
4021 //
4022 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
4023 int max_oop_map_count =
4024 super_oop_map_count +
4025 fac->count[NONSTATIC_OOP] +
4026 value_type_oop_map_count;
4027
4028 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD);
4029 if (super_oop_map_count > 0) {
4030 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
4031 _super_klass->nonstatic_oop_map_count());
4032 }
4033
4034 int first_nonstatic_oop_offset = 0; // will be set for first oop field
4035
4036 bool compact_fields = CompactFields;
4037 int allocation_style = FieldsAllocationStyle;
4038 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4039 assert(false, "0 <= FieldsAllocationStyle <= 2");
4040 allocation_style = 1; // Optimistic
4041 }
4042
4043 // The next classes have predefined hard-coded fields offsets
4044 // (see in JavaClasses::compute_hard_coded_offsets()).
4045 // Use default fields allocation order for them.
4046 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4047 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4048 _class_name == vmSymbols::java_lang_Class() ||
4049 _class_name == vmSymbols::java_lang_ClassLoader() ||
4050 _class_name == vmSymbols::java_lang_ref_Reference() ||
4051 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4052 _class_name == vmSymbols::java_lang_StackTraceElement() ||
4053 _class_name == vmSymbols::java_lang_String() ||
4054 _class_name == vmSymbols::java_lang_Throwable() ||
4055 _class_name == vmSymbols::java_lang_Boolean() ||
4056 _class_name == vmSymbols::java_lang_Character() ||
4057 _class_name == vmSymbols::java_lang_Float() ||
4058 _class_name == vmSymbols::java_lang_Double() ||
4059 _class_name == vmSymbols::java_lang_Byte() ||
4060 _class_name == vmSymbols::java_lang_Short() ||
4061 _class_name == vmSymbols::java_lang_Integer() ||
4062 _class_name == vmSymbols::java_lang_Long())) {
4063 allocation_style = 0; // Allocate oops first
4064 compact_fields = false; // Don't compact fields
4065 }
4066
4067 int next_nonstatic_oop_offset = 0;
4068 int next_nonstatic_double_offset = 0;
4069
4070 // Rearrange fields for a given allocation style
4071 if( allocation_style == 0 ) {
4072 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4073 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4074 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4075 (nonstatic_oop_count * heapOopSize);
4076 } else if( allocation_style == 1 ) {
4077 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4078 next_nonstatic_double_offset = next_nonstatic_field_offset;
4079 } else if( allocation_style == 2 ) {
4080 // Fields allocation: oops fields in super and sub classes are together.
4081 if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) {
4082 if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) {
4083 allocation_style = 0; // allocate oops first
4084 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4085 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4086 (nonstatic_oop_count * heapOopSize);
4087 }
4088 }
4089 if( allocation_style == 2 ) {
4090 allocation_style = 1; // allocate oops last
4091 next_nonstatic_double_offset = next_nonstatic_field_offset;
4092 }
4093 } else {
4094 ShouldNotReachHere();
4095 }
4096
4097 int nonstatic_oop_space_count = 0;
4098 int nonstatic_word_space_count = 0;
4099 int nonstatic_short_space_count = 0;
4100 int nonstatic_byte_space_count = 0;
4101 int nonstatic_oop_space_offset = 0;
4102 int nonstatic_word_space_offset = 0;
4103 int nonstatic_short_space_offset = 0;
4104 int nonstatic_byte_space_offset = 0;
4105
4106 // Try to squeeze some of the fields into the gaps due to
4107 // long/double alignment.
4108 if (nonstatic_double_count > 0) {
4109 int offset = next_nonstatic_double_offset;
4110 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4111 if (compact_fields && offset != next_nonstatic_double_offset) {
4112 // Allocate available fields into the gap before double field.
4113 int length = next_nonstatic_double_offset - offset;
4114 assert(length == BytesPerInt, "");
4115 nonstatic_word_space_offset = offset;
4116 if (nonstatic_word_count > 0) {
4117 nonstatic_word_count -= 1;
4118 nonstatic_word_space_count = 1; // Only one will fit
4119 length -= BytesPerInt;
4120 offset += BytesPerInt;
4121 }
4122 nonstatic_short_space_offset = offset;
4123 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4124 nonstatic_short_count -= 1;
4125 nonstatic_short_space_count += 1;
4126 length -= BytesPerShort;
4127 offset += BytesPerShort;
4128 }
4129 nonstatic_byte_space_offset = offset;
4130 while (length > 0 && nonstatic_byte_count > 0) {
4131 nonstatic_byte_count -= 1;
4132 nonstatic_byte_space_count += 1;
4133 length -= 1;
4134 }
4135 // Allocate oop field in the gap if there are no other fields for that.
4136 nonstatic_oop_space_offset = offset;
4137 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4138 allocation_style != 0) { // when oop fields not first
4139 nonstatic_oop_count -= 1;
4140 nonstatic_oop_space_count = 1; // Only one will fit
4141 length -= heapOopSize;
4142 offset += heapOopSize;
4143 }
4144 }
4145 }
4146
4147 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4148 (nonstatic_double_count * BytesPerLong);
4149 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4150 (nonstatic_word_count * BytesPerInt);
4151 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4152 (nonstatic_short_count * BytesPerShort);
4153 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4154 nonstatic_byte_count;
4155
4156 // let oops jump before padding with this allocation style
4157 if( allocation_style == 1 ) {
4158 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4159 if( nonstatic_oop_count > 0 ) {
4160 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4161 }
4162 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4163 }
4164
4165 // Aligning embedded value types
4166 // bug below, the current algorithm to layout embedded value types always put them at the
4167 // end of the layout, which doesn't match the different allocation policies the VM is
4168 // supposed to provide => FixMe
4169 // Note also that the current alignment policy is to make each value type starting on a
4170 // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4171 // align value types according to their most constrained internal type.
4172 next_nonstatic_valuetype_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4173 int next_value_type_index = 0;
4174
4175 // Iterate over fields again and compute correct offsets.
4176 // The field allocation type was temporarily stored in the offset slot.
4177 // oop fields are located before non-oop fields (static and non-static).
4178 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4179
4180 // skip already laid out fields
4181 if (fs.is_offset_set()) continue;
4182
4183 // contended instance fields are handled below
4184 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4185
4186 int real_offset = 0;
4187 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4188
4189 // pack the rest of the fields
4190 switch (atype) {
4191 // Value types in static fields are handled with oops
4192 case STATIC_VALUETYPE: // Fallthrough
4193 case STATIC_OOP:
4194 real_offset = next_static_oop_offset;
4195 next_static_oop_offset += heapOopSize;
4196 break;
4197 case STATIC_BYTE:
4198 real_offset = next_static_byte_offset;
4199 next_static_byte_offset += 1;
4200 break;
4201 case STATIC_SHORT:
4202 real_offset = next_static_short_offset;
4203 next_static_short_offset += BytesPerShort;
4204 break;
4205 case STATIC_WORD:
4206 real_offset = next_static_word_offset;
4207 next_static_word_offset += BytesPerInt;
4208 break;
4209 case STATIC_DOUBLE:
4210 real_offset = next_static_double_offset;
4211 next_static_double_offset += BytesPerLong;
4212 break;
4213 case NONSTATIC_VALUETYPE:
4214 {
4215 Klass* klass = nonstatic_value_type_klasses[next_value_type_index];
4216 assert(klass != NULL, "Klass should have been loaded and resolved earlier");
4217 assert(klass->access_flags().is_value_type(),"Must be a value type");
4218 ValueKlass* vklass = ValueKlass::cast(klass);
4219 real_offset = next_nonstatic_valuetype_offset;
4220 next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset();
4221 // aligning next value type on a 64 bits boundary
4222 next_nonstatic_valuetype_offset = align_up(next_nonstatic_valuetype_offset, BytesPerLong);
4223 next_value_type_index += 1;
4224
4225 if (vklass->contains_oops()) { // add flatten oop maps
4226 int diff = real_offset - vklass->first_field_offset();
4227 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4228 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4229 while (map < last_map) {
4230 nonstatic_oop_maps->add(map->offset() + diff, map->count());
4231 map++;
4232 }
4233 }
4234 }
4235 break;
4236 case NONSTATIC_OOP:
4237 if( nonstatic_oop_space_count > 0 ) {
4238 real_offset = nonstatic_oop_space_offset;
4239 nonstatic_oop_space_offset += heapOopSize;
4240 nonstatic_oop_space_count -= 1;
4241 } else {
4242 real_offset = next_nonstatic_oop_offset;
4243 next_nonstatic_oop_offset += heapOopSize;
4244 }
4245 nonstatic_oop_maps->add(real_offset, 1);
4246 break;
4247 case NONSTATIC_BYTE:
4248 if( nonstatic_byte_space_count > 0 ) {
4249 real_offset = nonstatic_byte_space_offset;
4250 nonstatic_byte_space_offset += 1;
4251 nonstatic_byte_space_count -= 1;
4252 } else {
4253 real_offset = next_nonstatic_byte_offset;
4254 next_nonstatic_byte_offset += 1;
4255 }
4256 break;
4257 case NONSTATIC_SHORT:
4258 if( nonstatic_short_space_count > 0 ) {
4259 real_offset = nonstatic_short_space_offset;
4260 nonstatic_short_space_offset += BytesPerShort;
4261 nonstatic_short_space_count -= 1;
4262 } else {
4263 real_offset = next_nonstatic_short_offset;
4264 next_nonstatic_short_offset += BytesPerShort;
4265 }
4266 break;
4267 case NONSTATIC_WORD:
4268 if( nonstatic_word_space_count > 0 ) {
4269 real_offset = nonstatic_word_space_offset;
4270 nonstatic_word_space_offset += BytesPerInt;
4271 nonstatic_word_space_count -= 1;
4272 } else {
4273 real_offset = next_nonstatic_word_offset;
4274 next_nonstatic_word_offset += BytesPerInt;
4275 }
4276 break;
4277 case NONSTATIC_DOUBLE:
4278 real_offset = next_nonstatic_double_offset;
4279 next_nonstatic_double_offset += BytesPerLong;
4280 break;
4281 default:
4282 ShouldNotReachHere();
4283 }
4284 fs.set_offset(real_offset);
4285 }
4286
4287
4288 // Handle the contended cases.
4289 //
4290 // Each contended field should not intersect the cache line with another contended field.
4291 // In the absence of alignment information, we end up with pessimistically separating
4292 // the fields with full-width padding.
4293 //
4294 // Additionally, this should not break alignment for the fields, so we round the alignment up
4295 // for each field.
4296 if (nonstatic_contended_count > 0) {
4297
4298 // if there is at least one contended field, we need to have pre-padding for them
4299 next_nonstatic_padded_offset += ContendedPaddingWidth;
4300
4301 // collect all contended groups
4302 ResourceBitMap bm(cp->size());
4303 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4304 // skip already laid out fields
4305 if (fs.is_offset_set()) continue;
4306
4307 if (fs.is_contended()) {
4308 bm.set_bit(fs.contended_group());
4309 }
4310 }
4311
4312 int current_group = -1;
4313 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4314
4315 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4316
4317 // skip already laid out fields
4318 if (fs.is_offset_set()) continue;
4319
4320 // skip non-contended fields and fields from different group
4321 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4322
4323 // handle statics below
4324 if (fs.access_flags().is_static()) continue;
4325
4326 int real_offset = 0;
4327 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4328
4329 switch (atype) {
4330 case NONSTATIC_BYTE:
4331 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4332 real_offset = next_nonstatic_padded_offset;
4333 next_nonstatic_padded_offset += 1;
4334 break;
4335
4336 case NONSTATIC_SHORT:
4337 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4338 real_offset = next_nonstatic_padded_offset;
4339 next_nonstatic_padded_offset += BytesPerShort;
4340 break;
4341
4342 case NONSTATIC_WORD:
4343 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4344 real_offset = next_nonstatic_padded_offset;
4345 next_nonstatic_padded_offset += BytesPerInt;
4346 break;
4347
4348 case NONSTATIC_DOUBLE:
4349 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4350 real_offset = next_nonstatic_padded_offset;
4351 next_nonstatic_padded_offset += BytesPerLong;
4352 break;
4353
4354 // Value types in static fields are handled with oops
4355 case NONSTATIC_VALUETYPE:
4356 throwValueTypeLimitation(THREAD_AND_LOCATION,
4357 "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4358 return;
4359
4360 case NONSTATIC_OOP:
4361 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4362 real_offset = next_nonstatic_padded_offset;
4363 next_nonstatic_padded_offset += heapOopSize;
4364 nonstatic_oop_maps->add(real_offset, 1);
4365 break;
4366
4367 default:
4368 ShouldNotReachHere();
4369 }
4370
4371 if (fs.contended_group() == 0) {
4372 // Contended group defines the equivalence class over the fields:
4373 // the fields within the same contended group are not inter-padded.
4374 // The only exception is default group, which does not incur the
4375 // equivalence, and so requires intra-padding.
4376 next_nonstatic_padded_offset += ContendedPaddingWidth;
4377 }
4378
4379 fs.set_offset(real_offset);
4380 } // for
4381
4382 // Start laying out the next group.
4383 // Note that this will effectively pad the last group in the back;
4384 // this is expected to alleviate memory contention effects for
4385 // subclass fields and/or adjacent object.
4386 // If this was the default group, the padding is already in place.
4387 if (current_group != 0) {
4388 next_nonstatic_padded_offset += ContendedPaddingWidth;
4389 }
4390 }
4391
4392 // handle static fields
4393 }
4394
4395 // Entire class is contended, pad in the back.
4396 // This helps to alleviate memory contention effects for subclass fields
4397 // and/or adjacent object.
4398 if (is_contended_class) {
4399 assert(!is_value_type() && !is_value_capable_class(), "@Contended not supported for value types yet");
4400 next_nonstatic_padded_offset += ContendedPaddingWidth;
4401 }
4402
4403 int notaligned_nonstatic_fields_end;
4404 if (nonstatic_value_type_count != 0) {
4405 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4406 } else {
4407 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4408 }
4409
4410 int nonstatic_field_sz_align = heapOopSize;
4411 if (is_value_type() || is_value_capable_class()) {
4412 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4413 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4414 }
4415 }
4416 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4417 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4418 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4419
4420 int static_field_size = (static_fields_end -
4421 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4422 nonstatic_field_size = nonstatic_field_size +
4423 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4424
4425 int instance_size = align_object_size(instance_end / wordSize);
4426
4427 assert(instance_size == align_object_size(align_up(
4428 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4429 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4430
4431
4432 // Invariant: nonstatic_field end/start should only change if there are
4433 // nonstatic fields in the class, or if the class is contended. We compare
4434 // against the non-aligned value, so that end alignment will not fail the
4435 // assert without actually having the fields.
4436 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4437 is_contended_class ||
4438 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4439
4440 // Number of non-static oop map blocks allocated at end of klass.
4441 nonstatic_oop_maps->compact(THREAD);
4442
4443 #ifndef PRODUCT
4444 if ((PrintFieldLayout && !is_value_type()) ||
4445 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4446 print_field_layout(_class_name,
4447 _fields,
4448 cp,
4449 instance_size,
4450 nonstatic_fields_start,
4451 nonstatic_fields_end,
4452 static_fields_end);
4453 nonstatic_oop_maps->print_on(tty);
4454 tty->print("\n");
4455 }
4456
4457 #endif
4458 // Pass back information needed for InstanceKlass creation
4459 info->oop_map_blocks = nonstatic_oop_maps;
4460 info->instance_size = instance_size;
4461 info->static_field_size = static_field_size;
4462 info->nonstatic_field_size = nonstatic_field_size;
4463 info->has_nonstatic_fields = has_nonstatic_fields;
4464 }
4465
4466 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4467 assert(ik != NULL, "invariant");
4468
4469 const Klass* const super = ik->super();
4470
4471 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4472 // in which case we don't have to register objects as finalizable
4473 if (!_has_empty_finalizer) {
4474 if (_has_finalizer ||
4475 (super != NULL && super->has_finalizer())) {
4476 ik->set_has_finalizer();
4477 }
4478 }
4479
4480 #ifdef ASSERT
4481 bool f = false;
4482 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4483 vmSymbols::void_method_signature());
4484 if (m != NULL && !m->is_empty_method()) {
4485 f = true;
4486 }
4487
4488 // Spec doesn't prevent agent from redefinition of empty finalizer.
4489 // Despite the fact that it's generally bad idea and redefined finalizer
4490 // will not work as expected we shouldn't abort vm in this case
4491 if (!ik->has_redefined_this_or_super()) {
4492 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4493 }
4494 #endif
4495
4496 // Check if this klass supports the java.lang.Cloneable interface
4497 if (SystemDictionary::Cloneable_klass_loaded()) {
4498 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4499 ik->set_is_cloneable();
4500 }
4501 }
4502
4503 // Check if this klass has a vanilla default constructor
4504 if (super == NULL) {
4505 // java.lang.Object has empty default constructor
4506 ik->set_has_vanilla_constructor();
4507 } else {
4508 if (super->has_vanilla_constructor() &&
4509 _has_vanilla_constructor) {
4510 ik->set_has_vanilla_constructor();
4511 }
4512 #ifdef ASSERT
4513 bool v = false;
4514 if (super->has_vanilla_constructor()) {
4515 const Method* const constructor =
4516 ik->find_method(vmSymbols::object_initializer_name(),
4517 vmSymbols::void_method_signature());
4518 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4519 v = true;
4520 }
4521 }
4522 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4523 #endif
4524 }
4525
4526 // If it cannot be fast-path allocated, set a bit in the layout helper.
4527 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4528 assert(ik->size_helper() > 0, "layout_helper is initialized");
4529 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4530 || ik->is_abstract() || ik->is_interface()
4531 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4532 || ik->size_helper() >= FastAllocateSizeLimit) {
4533 // Forbid fast-path allocation.
4534 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4535 ik->set_layout_helper(lh);
4536 }
4537 }
4538
4539 bool ClassFileParser::supports_value_types() const {
4540 // Value types are only supported by class file version 53.1 and later
4541 return _major_version > JAVA_9_VERSION || (_major_version == JAVA_9_VERSION && _minor_version >= 1);
4542 }
4543
4544 // Attach super classes and interface classes to class loader data
4545 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4546 TRAPS) {
4547 assert(defined_klass != NULL, "invariant");
4548
4549 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4550 if (defining_loader_data->is_the_null_class_loader_data()) {
4551 // Dependencies to null class loader data are implicit.
4552 return;
4553 } else {
4554 // add super class dependency
4555 Klass* const super = defined_klass->super();
4556 if (super != NULL) {
4557 defining_loader_data->record_dependency(super, CHECK);
4558 }
4559
4560 // add super interface dependencies
4561 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4562 if (local_interfaces != NULL) {
4563 const int length = local_interfaces->length();
4564 for (int i = 0; i < length; i++) {
4565 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4566 }
4567 }
4568
4569 for (FieldStream st((InstanceKlass*)defined_klass, false, false); !st.eos(); st.next()) {
4570 Symbol* signature = st.signature();
4571 if (signature->starts_with("Q")) {
4572 Klass* klass = SystemDictionary::resolve_or_fail(signature,
4573 Handle(THREAD, defined_klass->class_loader()),
4574 Handle(THREAD, defined_klass->protection_domain()), true, CHECK);
4575 assert(klass != NULL, "Sanity check");
4576 assert(klass->access_flags().is_value_type(), "Value type expected");
4577 defining_loader_data->record_dependency(klass, CHECK);
4578 }
4579 }
4580 }
4581 }
4582
4583 // utility methods for appending an array with check for duplicates
4584
4585 static void append_interfaces(GrowableArray<Klass*>* result,
4586 const Array<Klass*>* const ifs) {
4587 // iterate over new interfaces
4588 for (int i = 0; i < ifs->length(); i++) {
4589 Klass* const e = ifs->at(i);
4590 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4591 // add new interface
4592 result->append_if_missing(e);
4593 }
4594 }
4595
4596 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4597 Array<Klass*>* local_ifs,
4598 ClassLoaderData* loader_data,
4599 TRAPS) {
4600 assert(local_ifs != NULL, "invariant");
4601 assert(loader_data != NULL, "invariant");
4602
4603 // Compute maximum size for transitive interfaces
4604 int max_transitive_size = 0;
4605 int super_size = 0;
4606 // Add superclass transitive interfaces size
4607 if (super != NULL) {
4608 super_size = super->transitive_interfaces()->length();
4609 max_transitive_size += super_size;
4610 }
4611 // Add local interfaces' super interfaces
4612 const int local_size = local_ifs->length();
4613 for (int i = 0; i < local_size; i++) {
4614 Klass* const l = local_ifs->at(i);
4615 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4616 }
4617 // Finally add local interfaces
4618 max_transitive_size += local_size;
4619 // Construct array
4620 if (max_transitive_size == 0) {
4621 // no interfaces, use canonicalized array
4622 return Universe::the_empty_klass_array();
4623 } else if (max_transitive_size == super_size) {
4624 // no new local interfaces added, share superklass' transitive interface array
4625 return super->transitive_interfaces();
4626 } else if (max_transitive_size == local_size) {
4627 // only local interfaces added, share local interface array
4628 return local_ifs;
4629 } else {
4630 ResourceMark rm;
4631 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4632
4633 // Copy down from superclass
4634 if (super != NULL) {
4635 append_interfaces(result, super->transitive_interfaces());
4636 }
4637
4638 // Copy down from local interfaces' superinterfaces
4639 for (int i = 0; i < local_size; i++) {
4640 Klass* const l = local_ifs->at(i);
4641 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4642 }
4643 // Finally add local interfaces
4644 append_interfaces(result, local_ifs);
4645
4646 // length will be less than the max_transitive_size if duplicates were removed
4647 const int length = result->length();
4648 assert(length <= max_transitive_size, "just checking");
4649 Array<Klass*>* const new_result =
4650 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4651 for (int i = 0; i < length; i++) {
4652 Klass* const e = result->at(i);
4653 assert(e != NULL, "just checking");
4654 new_result->at_put(i, e);
4655 }
4656 return new_result;
4657 }
4658 }
4659
4660 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4661 assert(this_klass != NULL, "invariant");
4662 const Klass* const super = this_klass->super();
4663 if (super != NULL) {
4664
4665 // If the loader is not the boot loader then throw an exception if its
4666 // superclass is in package jdk.internal.reflect and its loader is not a
4667 // special reflection class loader
4668 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4669 assert(super->is_instance_klass(), "super is not instance klass");
4670 PackageEntry* super_package = super->package();
4671 if (super_package != NULL &&
4672 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4673 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4674 ResourceMark rm(THREAD);
4675 Exceptions::fthrow(
4676 THREAD_AND_LOCATION,
4677 vmSymbols::java_lang_IllegalAccessError(),
4678 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4679 this_klass->external_name(),
4680 this_klass->class_loader_data()->loader_name(),
4681 super->external_name());
4682 return;
4683 }
4684 }
4685
4686 Reflection::VerifyClassAccessResults vca_result =
4687 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4688 if (vca_result != Reflection::ACCESS_OK) {
4689 ResourceMark rm(THREAD);
4690 char* msg = Reflection::verify_class_access_msg(this_klass,
4691 InstanceKlass::cast(super),
4692 vca_result);
4693 if (msg == NULL) {
4694 Exceptions::fthrow(
4695 THREAD_AND_LOCATION,
4696 vmSymbols::java_lang_IllegalAccessError(),
4697 "class %s cannot access its superclass %s",
4698 this_klass->external_name(),
4699 super->external_name());
4700 } else {
4701 // Add additional message content.
4702 Exceptions::fthrow(
4703 THREAD_AND_LOCATION,
4704 vmSymbols::java_lang_IllegalAccessError(),
4705 "superclass access check failed: %s",
4706 msg);
4707 }
4708 }
4709 }
4710 }
4711
4712
4713 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4714 assert(this_klass != NULL, "invariant");
4715 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4716 const int lng = local_interfaces->length();
4717 for (int i = lng - 1; i >= 0; i--) {
4718 Klass* const k = local_interfaces->at(i);
4719 assert (k != NULL && k->is_interface(), "invalid interface");
4720 Reflection::VerifyClassAccessResults vca_result =
4721 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4722 if (vca_result != Reflection::ACCESS_OK) {
4723 ResourceMark rm(THREAD);
4724 char* msg = Reflection::verify_class_access_msg(this_klass,
4725 InstanceKlass::cast(k),
4726 vca_result);
4727 if (msg == NULL) {
4728 Exceptions::fthrow(
4729 THREAD_AND_LOCATION,
4730 vmSymbols::java_lang_IllegalAccessError(),
4731 "class %s cannot access its superinterface %s",
4732 this_klass->external_name(),
4733 k->external_name());
4734 } else {
4735 // Add additional message content.
4736 Exceptions::fthrow(
4737 THREAD_AND_LOCATION,
4738 vmSymbols::java_lang_IllegalAccessError(),
4739 "superinterface check failed: %s",
4740 msg);
4741 }
4742 }
4743 }
4744 }
4745
4746
4747 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4748 assert(this_klass != NULL, "invariant");
4749 const Array<Method*>* const methods = this_klass->methods();
4750 const int num_methods = methods->length();
4751
4752 // go thru each method and check if it overrides a final method
4753 for (int index = 0; index < num_methods; index++) {
4754 const Method* const m = methods->at(index);
4755
4756 // skip private, static, and <init> methods
4757 if ((!m->is_private() && !m->is_static()) &&
4758 (m->name() != vmSymbols::object_initializer_name())) {
4759
4760 const Symbol* const name = m->name();
4761 const Symbol* const signature = m->signature();
4762 const Klass* k = this_klass->super();
4763 const Method* super_m = NULL;
4764 while (k != NULL) {
4765 // skip supers that don't have final methods.
4766 if (k->has_final_method()) {
4767 // lookup a matching method in the super class hierarchy
4768 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4769 if (super_m == NULL) {
4770 break; // didn't find any match; get out
4771 }
4772
4773 if (super_m->is_final() && !super_m->is_static() &&
4774 // matching method in super is final, and not static
4775 (Reflection::verify_field_access(this_klass,
4776 super_m->method_holder(),
4777 super_m->method_holder(),
4778 super_m->access_flags(), false))
4779 // this class can access super final method and therefore override
4780 ) {
4781 ResourceMark rm(THREAD);
4782 Exceptions::fthrow(
4783 THREAD_AND_LOCATION,
4784 vmSymbols::java_lang_VerifyError(),
4785 "class %s overrides final method %s.%s%s",
4786 this_klass->external_name(),
4787 super_m->method_holder()->external_name(),
4788 name->as_C_string(),
4789 signature->as_C_string()
4790 );
4791 return;
4792 }
4793
4794 // continue to look from super_m's holder's super.
4795 k = super_m->method_holder()->super();
4796 continue;
4797 }
4798
4799 k = k->super();
4800 }
4801 }
4802 }
4803 }
4804
4805
4806 // assumes that this_klass is an interface
4807 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4808 assert(this_klass != NULL, "invariant");
4809 assert(this_klass->is_interface(), "not an interface");
4810 const Array<Method*>* methods = this_klass->methods();
4811 const int num_methods = methods->length();
4812
4813 for (int index = 0; index < num_methods; index++) {
4814 const Method* const m = methods->at(index);
4815 // if m is static and not the init method, throw a verify error
4816 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4817 ResourceMark rm(THREAD);
4818 Exceptions::fthrow(
4819 THREAD_AND_LOCATION,
4820 vmSymbols::java_lang_VerifyError(),
4821 "Illegal static method %s in interface %s",
4822 m->name()->as_C_string(),
4823 this_klass->external_name()
4824 );
4825 return;
4826 }
4827 }
4828 }
4829
4830 // utility methods for format checking
4831
4832 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4833 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4834 const bool is_value_type = (flags & JVM_ACC_VALUE) != 0;
4835 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4836 assert(supports_value_types() || !is_value_type, "JVM_ACC_VALUE should not be set");
4837 if (is_module) {
4838 ResourceMark rm(THREAD);
4839 Exceptions::fthrow(
4840 THREAD_AND_LOCATION,
4841 vmSymbols::java_lang_NoClassDefFoundError(),
4842 "%s is not a class because access_flag ACC_MODULE is set",
4843 _class_name->as_C_string());
4844 return;
4845 }
4846
4847 if (!_need_verify) { return; }
4848
4849 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4850 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4851 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4852 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4853 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4854 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4855 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4856
4857 if ((is_abstract && is_final) ||
4858 (is_interface && !is_abstract) ||
4859 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4860 (!is_interface && major_gte_15 && is_annotation)) {
4861 ResourceMark rm(THREAD);
4862 Exceptions::fthrow(
4863 THREAD_AND_LOCATION,
4864 vmSymbols::java_lang_ClassFormatError(),
4865 "Illegal class modifiers in class %s: 0x%X",
4866 _class_name->as_C_string(), flags
4867 );
4868 return;
4869 }
4870 }
4871
4872 static bool has_illegal_visibility(jint flags) {
4873 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4874 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4875 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4876
4877 return ((is_public && is_protected) ||
4878 (is_public && is_private) ||
4879 (is_protected && is_private));
4880 }
4881
4882 static bool is_supported_version(u2 major, u2 minor) {
4883 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4884 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4885 (major <= max_version) &&
4886 ((major != max_version) ||
4887 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4888 }
4889
4890 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4891 bool is_interface,
4892 TRAPS) const {
4893 if (!_need_verify) { return; }
4894
4895 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4896 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4897 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4898 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4899 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4900 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4901 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4902 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4903 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4904
4905 bool is_illegal = false;
4906
4907 if (is_interface) {
4908 if (!is_public || !is_static || !is_final || is_private ||
4909 is_protected || is_volatile || is_transient ||
4910 (major_gte_15 && is_enum)) {
4911 is_illegal = true;
4912 }
4913 } else { // not interface
4914 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4915 is_illegal = true;
4916 }
4917 }
4918
4919 if (is_illegal) {
4920 ResourceMark rm(THREAD);
4921 Exceptions::fthrow(
4922 THREAD_AND_LOCATION,
4923 vmSymbols::java_lang_ClassFormatError(),
4924 "Illegal field modifiers in class %s: 0x%X",
4925 _class_name->as_C_string(), flags);
4926 return;
4927 }
4928 }
4929
4930 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4931 bool is_interface,
4932 const Symbol* name,
4933 TRAPS) const {
4934 if (!_need_verify) { return; }
4935
4936 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4937 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4938 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4939 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4940 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4941 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4942 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4943 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4944 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4945 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4946 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4947 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4948 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4949
4950 bool is_illegal = false;
4951
4952 if (is_interface) {
4953 if (major_gte_8) {
4954 // Class file version is JAVA_8_VERSION or later Methods of
4955 // interfaces may set any of the flags except ACC_PROTECTED,
4956 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4957 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4958 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4959 (is_native || is_protected || is_final || is_synchronized) ||
4960 // If a specific method of a class or interface has its
4961 // ACC_ABSTRACT flag set, it must not have any of its
4962 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4963 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4964 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4965 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4966 (is_abstract && (is_private || is_static || is_strict))) {
4967 is_illegal = true;
4968 }
4969 } else if (major_gte_15) {
4970 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4971 if (!is_public || is_private || is_protected || is_static || is_final ||
4972 is_synchronized || is_native || !is_abstract || is_strict) {
4973 is_illegal = true;
4974 }
4975 } else {
4976 // Class file version is pre-JAVA_1_5_VERSION
4977 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4978 is_illegal = true;
4979 }
4980 }
4981 } else { // not interface
4982 if (has_illegal_visibility(flags)) {
4983 is_illegal = true;
4984 } else {
4985 if (is_initializer) {
4986 if (is_static || is_final || is_synchronized || is_native ||
4987 is_abstract || (major_gte_15 && is_bridge)) {
4988 is_illegal = true;
4989 }
4990 } else { // not initializer
4991 if (is_abstract) {
4992 if ((is_final || is_native || is_private || is_static ||
4993 (major_gte_15 && (is_synchronized || is_strict)))) {
4994 is_illegal = true;
4995 }
4996 }
4997 }
4998 }
4999 }
5000
5001 if (is_illegal) {
5002 ResourceMark rm(THREAD);
5003 Exceptions::fthrow(
5004 THREAD_AND_LOCATION,
5005 vmSymbols::java_lang_ClassFormatError(),
5006 "Method %s in class %s has illegal modifiers: 0x%X",
5007 name->as_C_string(), _class_name->as_C_string(), flags);
5008 return;
5009 }
5010 }
5011
5012 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5013 int length,
5014 TRAPS) const {
5015 assert(_need_verify, "only called when _need_verify is true");
5016 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5017 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5018 }
5019 }
5020
5021 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5022 // In class names, '/' separates unqualified names. This is verified in this function also.
5023 // Method names also may not contain the characters '<' or '>', unless <init>
5024 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5025 // method. Because these names have been checked as special cases before
5026 // calling this method in verify_legal_method_name.
5027 //
5028 // This method is also called from the modular system APIs in modules.cpp
5029 // to verify the validity of module and package names.
5030 bool ClassFileParser::verify_unqualified_name(const char* name,
5031 unsigned int length,
5032 int type) {
5033 for (const char* p = name; p != name + length;) {
5034 jchar ch = *p;
5035 if (ch < 128) {
5036 if (ch == '.' || ch == ';' || ch == '[' ) {
5037 return false; // do not permit '.', ';', or '['
5038 }
5039 if (ch == '/') {
5040 // check for '//' or leading or trailing '/' which are not legal
5041 // unqualified name must not be empty
5042 if (type == ClassFileParser::LegalClass) {
5043 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5044 return false;
5045 }
5046 } else {
5047 return false; // do not permit '/' unless it's class name
5048 }
5049 }
5050 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5051 return false; // do not permit '<' or '>' in method names
5052 }
5053 p++;
5054 } else {
5055 char* tmp_p = UTF8::next(p, &ch);
5056 p = tmp_p;
5057 }
5058 }
5059 return true;
5060 }
5061
5062 // Take pointer to a string. Skip over the longest part of the string that could
5063 // be taken as a fieldname. Allow '/' if slash_ok is true.
5064 // Return a pointer to just past the fieldname.
5065 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5066 // being true, we saw consecutive slashes (meaning we were looking for a
5067 // qualified path but found something that was badly-formed).
5068 static const char* skip_over_field_name(const char* name,
5069 bool slash_ok,
5070 unsigned int length) {
5071 const char* p;
5072 jboolean last_is_slash = false;
5073 jboolean not_first_ch = false;
5074
5075 for (p = name; p != name + length; not_first_ch = true) {
5076 const char* old_p = p;
5077 jchar ch = *p;
5078 if (ch < 128) {
5079 p++;
5080 // quick check for ascii
5081 if ((ch >= 'a' && ch <= 'z') ||
5082 (ch >= 'A' && ch <= 'Z') ||
5083 (ch == '_' || ch == '$') ||
5084 (not_first_ch && ch >= '0' && ch <= '9')) {
5085 last_is_slash = false;
5086 continue;
5087 }
5088 if (slash_ok && ch == '/') {
5089 if (last_is_slash) {
5090 return NULL; // Don't permit consecutive slashes
5091 }
5092 last_is_slash = true;
5093 continue;
5094 }
5095 }
5096 else {
5097 jint unicode_ch;
5098 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5099 p = tmp_p;
5100 last_is_slash = false;
5101 // Check if ch is Java identifier start or is Java identifier part
5102 // 4672820: call java.lang.Character methods directly without generating separate tables.
5103 EXCEPTION_MARK;
5104
5105 // return value
5106 JavaValue result(T_BOOLEAN);
5107 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5108 JavaCallArguments args;
5109 args.push_int(unicode_ch);
5110
5111 // public static boolean isJavaIdentifierStart(char ch);
5112 JavaCalls::call_static(&result,
5113 SystemDictionary::Character_klass(),
5114 vmSymbols::isJavaIdentifierStart_name(),
5115 vmSymbols::int_bool_signature(),
5116 &args,
5117 THREAD);
5118
5119 if (HAS_PENDING_EXCEPTION) {
5120 CLEAR_PENDING_EXCEPTION;
5121 return 0;
5122 }
5123 if (result.get_jboolean()) {
5124 continue;
5125 }
5126
5127 if (not_first_ch) {
5128 // public static boolean isJavaIdentifierPart(char ch);
5129 JavaCalls::call_static(&result,
5130 SystemDictionary::Character_klass(),
5131 vmSymbols::isJavaIdentifierPart_name(),
5132 vmSymbols::int_bool_signature(),
5133 &args,
5134 THREAD);
5135
5136 if (HAS_PENDING_EXCEPTION) {
5137 CLEAR_PENDING_EXCEPTION;
5138 return 0;
5139 }
5140
5141 if (result.get_jboolean()) {
5142 continue;
5143 }
5144 }
5145 }
5146 return (not_first_ch) ? old_p : NULL;
5147 }
5148 return (not_first_ch) ? p : NULL;
5149 }
5150
5151 // Take pointer to a string. Skip over the longest part of the string that could
5152 // be taken as a field signature. Allow "void" if void_ok.
5153 // Return a pointer to just past the signature.
5154 // Return NULL if no legal signature is found.
5155 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5156 bool void_ok,
5157 unsigned int length,
5158 TRAPS) const {
5159 unsigned int array_dim = 0;
5160 while (length > 0) {
5161 switch (signature[0]) {
5162 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5163 case JVM_SIGNATURE_BOOLEAN:
5164 case JVM_SIGNATURE_BYTE:
5165 case JVM_SIGNATURE_CHAR:
5166 case JVM_SIGNATURE_SHORT:
5167 case JVM_SIGNATURE_INT:
5168 case JVM_SIGNATURE_FLOAT:
5169 case JVM_SIGNATURE_LONG:
5170 case JVM_SIGNATURE_DOUBLE:
5171 return signature + 1;
5172 case JVM_SIGNATURE_CLASS:
5173 case JVM_SIGNATURE_VALUE_CLASS: {
5174 if (_major_version < JAVA_1_5_VERSION) {
5175 // Skip over the class name if one is there
5176 const char* const p = skip_over_field_name(signature + 1, true, --length);
5177
5178 // The next character better be a semicolon
5179 if (p && (p - signature) > 1 && p[0] == ';') {
5180 return p + 1;
5181 }
5182 }
5183 else {
5184 // Skip leading 'L' and ignore first appearance of ';'
5185 length--;
5186 signature++;
5187 char* c = strchr((char*) signature, ';');
5188 // Format check signature
5189 if (c != NULL) {
5190 ResourceMark rm(THREAD);
5191 int newlen = c - (char*) signature;
5192 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5193 strncpy(sig, signature, newlen);
5194 sig[newlen] = '\0';
5195
5196 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5197 if (!legal) {
5198 classfile_parse_error("Class name contains illegal character "
5199 "in descriptor in class file %s",
5200 CHECK_0);
5201 return NULL;
5202 }
5203 return signature + newlen + 1;
5204 }
5205 }
5206 return NULL;
5207 }
5208 case JVM_SIGNATURE_ARRAY:
5209 array_dim++;
5210 if (array_dim > 255) {
5211 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5212 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5213 }
5214 // The rest of what's there better be a legal signature
5215 signature++;
5216 length--;
5217 void_ok = false;
5218 break;
5219 default:
5220 return NULL;
5221 }
5222 }
5223 return NULL;
5224 }
5225
5226 // Checks if name is a legal class name.
5227 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5228 if (!_need_verify || _relax_verify) { return; }
5229
5230 char buf[fixed_buffer_size];
5231 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5232 unsigned int length = name->utf8_length();
5233 bool legal = false;
5234
5235 if (length > 0) {
5236 const char* p;
5237 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5238 p = skip_over_field_signature(bytes, false, length, CHECK);
5239 legal = (p != NULL) && ((p - bytes) == (int)length);
5240 } else if (_major_version < JAVA_1_5_VERSION) {
5241 if (bytes[0] != '<') {
5242 p = skip_over_field_name(bytes, true, length);
5243 legal = (p != NULL) && ((p - bytes) == (int)length);
5244 }
5245 } else {
5246 // 4900761: relax the constraints based on JSR202 spec
5247 // Class names may be drawn from the entire Unicode character set.
5248 // Identifiers between '/' must be unqualified names.
5249 // The utf8 string has been verified when parsing cpool entries.
5250 legal = verify_unqualified_name(bytes, length, LegalClass);
5251 }
5252 }
5253 if (!legal) {
5254 ResourceMark rm(THREAD);
5255 assert(_class_name != NULL, "invariant");
5256 Exceptions::fthrow(
5257 THREAD_AND_LOCATION,
5258 vmSymbols::java_lang_ClassFormatError(),
5259 "Illegal class name \"%s\" in class file %s", bytes,
5260 _class_name->as_C_string()
5261 );
5262 return;
5263 }
5264 }
5265
5266 // Checks if name is a legal field name.
5267 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5268 if (!_need_verify || _relax_verify) { return; }
5269
5270 char buf[fixed_buffer_size];
5271 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5272 unsigned int length = name->utf8_length();
5273 bool legal = false;
5274
5275 if (length > 0) {
5276 if (_major_version < JAVA_1_5_VERSION) {
5277 if (bytes[0] != '<') {
5278 const char* p = skip_over_field_name(bytes, false, length);
5279 legal = (p != NULL) && ((p - bytes) == (int)length);
5280 }
5281 } else {
5282 // 4881221: relax the constraints based on JSR202 spec
5283 legal = verify_unqualified_name(bytes, length, LegalField);
5284 }
5285 }
5286
5287 if (!legal) {
5288 ResourceMark rm(THREAD);
5289 assert(_class_name != NULL, "invariant");
5290 Exceptions::fthrow(
5291 THREAD_AND_LOCATION,
5292 vmSymbols::java_lang_ClassFormatError(),
5293 "Illegal field name \"%s\" in class %s", bytes,
5294 _class_name->as_C_string()
5295 );
5296 return;
5297 }
5298 }
5299
5300 // Checks if name is a legal method name.
5301 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5302 if (!_need_verify || _relax_verify) { return; }
5303
5304 assert(name != NULL, "method name is null");
5305 char buf[fixed_buffer_size];
5306 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5307 unsigned int length = name->utf8_length();
5308 bool legal = false;
5309
5310 if (length > 0) {
5311 if (bytes[0] == '<') {
5312 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5313 legal = true;
5314 }
5315 } else if (_major_version < JAVA_1_5_VERSION) {
5316 const char* p;
5317 p = skip_over_field_name(bytes, false, length);
5318 legal = (p != NULL) && ((p - bytes) == (int)length);
5319 } else {
5320 // 4881221: relax the constraints based on JSR202 spec
5321 legal = verify_unqualified_name(bytes, length, LegalMethod);
5322 }
5323 }
5324
5325 if (!legal) {
5326 ResourceMark rm(THREAD);
5327 assert(_class_name != NULL, "invariant");
5328 Exceptions::fthrow(
5329 THREAD_AND_LOCATION,
5330 vmSymbols::java_lang_ClassFormatError(),
5331 "Illegal method name \"%s\" in class %s", bytes,
5332 _class_name->as_C_string()
5333 );
5334 return;
5335 }
5336 }
5337
5338
5339 // Checks if signature is a legal field signature.
5340 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5341 const Symbol* signature,
5342 TRAPS) const {
5343 if (!_need_verify) { return; }
5344
5345 char buf[fixed_buffer_size];
5346 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5347 const unsigned int length = signature->utf8_length();
5348 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5349
5350 if (p == NULL || (p - bytes) != (int)length) {
5351 throwIllegalSignature("Field", name, signature, CHECK);
5352 }
5353 }
5354
5355 // Checks if signature is a legal method signature.
5356 // Returns number of parameters
5357 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5358 const Symbol* signature,
5359 TRAPS) const {
5360 if (!_need_verify) {
5361 // make sure caller's args_size will be less than 0 even for non-static
5362 // method so it will be recomputed in compute_size_of_parameters().
5363 return -2;
5364 }
5365
5366 // Class initializers cannot have args for class format version >= 51.
5367 if (name == vmSymbols::class_initializer_name() &&
5368 signature != vmSymbols::void_method_signature() &&
5369 _major_version >= JAVA_7_VERSION) {
5370 throwIllegalSignature("Method", name, signature, CHECK_0);
5371 return 0;
5372 }
5373
5374 unsigned int args_size = 0;
5375 char buf[fixed_buffer_size];
5376 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5377 unsigned int length = signature->utf8_length();
5378 const char* nextp;
5379
5380 // The first character must be a '('
5381 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5382 length--;
5383 // Skip over legal field signatures
5384 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5385 while ((length > 0) && (nextp != NULL)) {
5386 args_size++;
5387 if (p[0] == 'J' || p[0] == 'D') {
5388 args_size++;
5389 }
5390 length -= nextp - p;
5391 p = nextp;
5392 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5393 }
5394 // The first non-signature thing better be a ')'
5395 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5396 length--;
5397 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5398 // All internal methods must return void
5399 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5400 return args_size;
5401 }
5402 } else {
5403 // Now we better just have a return value
5404 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5405 if (nextp && ((int)length == (nextp - p))) {
5406 return args_size;
5407 }
5408 }
5409 }
5410 }
5411 // Report error
5412 throwIllegalSignature("Method", name, signature, CHECK_0);
5413 return 0;
5414 }
5415
5416 int ClassFileParser::static_field_size() const {
5417 assert(_field_info != NULL, "invariant");
5418 return _field_info->static_field_size;
5419 }
5420
5421 int ClassFileParser::total_oop_map_count() const {
5422 assert(_field_info != NULL, "invariant");
5423 return _field_info->oop_map_blocks->nonstatic_oop_map_count;
5424 }
5425
5426 jint ClassFileParser::layout_size() const {
5427 assert(_field_info != NULL, "invariant");
5428 return _field_info->instance_size;
5429 }
5430
5431 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5432 const Array<Method*>* methods) {
5433 assert(ik != NULL, "invariant");
5434 assert(methods != NULL, "invariant");
5435
5436 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5437 // (We used to do this lazily, but now we query it in Rewriter,
5438 // which is eagerly done for every method, so we might as well do it now,
5439 // when everything is fresh in memory.)
5440 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5441
5442 if (klass_id != vmSymbols::NO_SID) {
5443 for (int j = 0; j < methods->length(); ++j) {
5444 Method* method = methods->at(j);
5445 method->init_intrinsic_id();
5446
5447 if (CheckIntrinsics) {
5448 // Check if an intrinsic is defined for method 'method',
5449 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5450 if (method->intrinsic_id() != vmIntrinsics::_none &&
5451 !method->intrinsic_candidate()) {
5452 tty->print("Compiler intrinsic is defined for method [%s], "
5453 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5454 method->name_and_sig_as_C_string(),
5455 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5456 );
5457 tty->cr();
5458 DEBUG_ONLY(vm_exit(1));
5459 }
5460 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5461 // but there is no intrinsic available for it.
5462 if (method->intrinsic_candidate() &&
5463 method->intrinsic_id() == vmIntrinsics::_none) {
5464 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5465 "but no compiler intrinsic is defined for the method.%s",
5466 method->name_and_sig_as_C_string(),
5467 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5468 );
5469 tty->cr();
5470 DEBUG_ONLY(vm_exit(1));
5471 }
5472 }
5473 } // end for
5474
5475 #ifdef ASSERT
5476 if (CheckIntrinsics) {
5477 // Check for orphan methods in the current class. A method m
5478 // of a class C is orphan if an intrinsic is defined for method m,
5479 // but class C does not declare m.
5480 // The check is potentially expensive, therefore it is available
5481 // only in debug builds.
5482
5483 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5484 if (vmIntrinsics::_compiledLambdaForm == id) {
5485 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5486 // generated for the JVM from a LambdaForm and therefore no method
5487 // is defined for it.
5488 continue;
5489 }
5490
5491 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5492 // Check if the current class contains a method with the same
5493 // name, flags, signature.
5494 bool match = false;
5495 for (int j = 0; j < methods->length(); ++j) {
5496 const Method* method = methods->at(j);
5497 if (method->intrinsic_id() == id) {
5498 match = true;
5499 break;
5500 }
5501 }
5502
5503 if (!match) {
5504 char buf[1000];
5505 tty->print("Compiler intrinsic is defined for method [%s], "
5506 "but the method is not available in class [%s].%s",
5507 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5508 buf, sizeof(buf)),
5509 ik->name()->as_C_string(),
5510 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5511 );
5512 tty->cr();
5513 DEBUG_ONLY(vm_exit(1));
5514 }
5515 }
5516 } // end for
5517 } // CheckIntrinsics
5518 #endif // ASSERT
5519 }
5520 }
5521
5522 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5523 if (_klass != NULL) {
5524 return _klass;
5525 }
5526
5527 InstanceKlass* const ik =
5528 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5529
5530 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5531
5532 assert(_klass == ik, "invariant");
5533
5534 ik->set_has_passed_fingerprint_check(false);
5535 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5536 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5537 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5538 // This class matches with a class saved in an AOT library
5539 ik->set_has_passed_fingerprint_check(true);
5540 } else {
5541 ResourceMark rm;
5542 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5543 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5544 }
5545 }
5546
5547 return ik;
5548 }
5549
5550 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5551 assert(ik != NULL, "invariant");
5552
5553 set_klass_to_deallocate(ik);
5554
5555 assert(_field_info != NULL, "invariant");
5556 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5557 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count,
5558 "sanity");
5559
5560 assert(ik->is_instance_klass(), "sanity");
5561 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5562
5563 // Fill in information already parsed
5564 ik->set_should_verify_class(_need_verify);
5565
5566 // Not yet: supers are done below to support the new subtype-checking fields
5567 ik->set_class_loader_data(_loader_data);
5568 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5569 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5570 assert(_fac != NULL, "invariant");
5571 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_VALUETYPE]);
5572
5573 // this transfers ownership of a lot of arrays from
5574 // the parser onto the InstanceKlass*
5575 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5576
5577 // note that is not safe to use the fields in the parser from this point on
5578 assert(NULL == _cp, "invariant");
5579 assert(NULL == _fields, "invariant");
5580 assert(NULL == _methods, "invariant");
5581 assert(NULL == _inner_classes, "invariant");
5582 assert(NULL == _local_interfaces, "invariant");
5583 assert(NULL == _transitive_interfaces, "invariant");
5584 assert(NULL == _combined_annotations, "invariant");
5585
5586 if (_has_final_method) {
5587 ik->set_has_final_method();
5588 }
5589
5590 ik->copy_method_ordering(_method_ordering, CHECK);
5591 // The InstanceKlass::_methods_jmethod_ids cache
5592 // is managed on the assumption that the initial cache
5593 // size is equal to the number of methods in the class. If
5594 // that changes, then InstanceKlass::idnum_can_increment()
5595 // has to be changed accordingly.
5596 ik->set_initial_method_idnum(ik->methods()->length());
5597
5598 ik->set_name(_class_name);
5599
5600 if (is_anonymous()) {
5601 // _this_class_index is a CONSTANT_Class entry that refers to this
5602 // anonymous class itself. If this class needs to refer to its own methods or
5603 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5604 // _this_class_index. However, because this class is anonymous (it's
5605 // not stored in SystemDictionary), _this_class_index cannot be resolved
5606 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5607 // Therefore, we must eagerly resolve _this_class_index now.
5608 ik->constants()->klass_at_put(_this_class_index, ik);
5609 }
5610
5611 ik->set_minor_version(_minor_version);
5612 ik->set_major_version(_major_version);
5613 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5614 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5615
5616 if (_host_klass != NULL) {
5617 assert (ik->is_anonymous(), "should be the same");
5618 ik->set_host_klass(_host_klass);
5619 }
5620
5621 // Set PackageEntry for this_klass
5622 oop cl = ik->class_loader();
5623 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5624 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5625 ik->set_package(cld, CHECK);
5626
5627 const Array<Method*>* const methods = ik->methods();
5628 assert(methods != NULL, "invariant");
5629 const int methods_len = methods->length();
5630
5631 check_methods_for_intrinsics(ik, methods);
5632
5633 // Fill in field values obtained by parse_classfile_attributes
5634 if (_parsed_annotations->has_any_annotations()) {
5635 _parsed_annotations->apply_to(ik);
5636 }
5637
5638 apply_parsed_class_attributes(ik);
5639
5640 // Miranda methods
5641 if ((_num_miranda_methods > 0) ||
5642 // if this class introduced new miranda methods or
5643 (_super_klass != NULL && _super_klass->has_miranda_methods())
5644 // super class exists and this class inherited miranda methods
5645 ) {
5646 ik->set_has_miranda_methods(); // then set a flag
5647 }
5648
5649 // Fill in information needed to compute superclasses.
5650 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5651
5652 // Initialize itable offset tables
5653 klassItable::setup_itable_offset_table(ik);
5654
5655 // Compute transitive closure of interfaces this class implements
5656 // Do final class setup
5657 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5658 if (oop_map_blocks->nonstatic_oop_map_count > 0) {
5659 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5660 }
5661
5662 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5663 set_precomputed_flags(ik);
5664
5665 // check if this class can access its super class
5666 check_super_class_access(ik, CHECK);
5667
5668 // check if this class can access its superinterfaces
5669 check_super_interface_access(ik, CHECK);
5670
5671 // check if this class overrides any final method
5672 check_final_method_override(ik, CHECK);
5673
5674 // reject static interface methods prior to Java 8
5675 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5676 check_illegal_static_method(ik, CHECK);
5677 }
5678
5679 // Obtain this_klass' module entry
5680 ModuleEntry* module_entry = ik->module();
5681 assert(module_entry != NULL, "module_entry should always be set");
5682
5683 // Obtain java.lang.Module
5684 Handle module_handle(THREAD, module_entry->module());
5685
5686 // Allocate mirror and initialize static fields
5687 // The create_mirror() call will also call compute_modifiers()
5688 java_lang_Class::create_mirror(ik,
5689 Handle(THREAD, _loader_data->class_loader()),
5690 module_handle,
5691 _protection_domain,
5692 CHECK);
5693
5694 assert(_all_mirandas != NULL, "invariant");
5695
5696 // Generate any default methods - default methods are public interface methods
5697 // that have a default implementation. This is new with Java 8.
5698 if (_has_nonstatic_concrete_methods) {
5699 DefaultMethods::generate_default_methods(ik,
5700 _all_mirandas,
5701 CHECK);
5702 }
5703
5704 if (is_value_type()) {
5705 ValueKlass* vk = ValueKlass::cast(ik);
5706 vk->set_if_bufferable();
5707 vk->initialize_calling_convention();
5708 }
5709
5710 // Valhalla shady value type conversion
5711 if (_parsed_annotations->is_value_capable_class()) {
5712 ik->create_value_capable_class(Handle(THREAD, _loader_data->class_loader()),
5713 _protection_domain, CHECK);
5714 }
5715
5716 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5717 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5718 !module_entry->has_default_read_edges()) {
5719 if (!module_entry->set_has_default_read_edges()) {
5720 // We won a potential race
5721 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5722 }
5723 }
5724
5725 // Update the loader_data graph.
5726 record_defined_class_dependencies(ik, CHECK);
5727
5728 for (FieldStream st((InstanceKlass*)ik, false, false); !st.eos(); st.next()) {
5729 Symbol* signature = st.signature();
5730 if (signature->starts_with("Q")) {
5731 Klass* klass = SystemDictionary::resolve_or_fail(signature,
5732 Handle(THREAD, ik->class_loader()),
5733 Handle(THREAD, ik->protection_domain()), true, CHECK);
5734 assert(klass != NULL, "Sanity check");
5735 assert(klass->access_flags().is_value_type(), "Value type expected");
5736 ik->set_value_field_klass(st.index(), klass);
5737 }
5738 }
5739
5740 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5741
5742 if (!is_internal()) {
5743 if (log_is_enabled(Info, class, load)) {
5744 ResourceMark rm;
5745 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5746 ik->print_class_load_logging(_loader_data, module_name, _stream);
5747 }
5748
5749 if (log_is_enabled(Debug, class, resolve)) {
5750 ResourceMark rm;
5751 // print out the superclass.
5752 const char * from = ik->external_name();
5753 if (ik->java_super() != NULL) {
5754 log_debug(class, resolve)("%s %s (super)",
5755 from,
5756 ik->java_super()->external_name());
5757 }
5758 // print out each of the interface classes referred to by this class.
5759 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5760 if (local_interfaces != NULL) {
5761 const int length = local_interfaces->length();
5762 for (int i = 0; i < length; i++) {
5763 const Klass* const k = local_interfaces->at(i);
5764 const char * to = k->external_name();
5765 log_debug(class, resolve)("%s %s (interface)", from, to);
5766 }
5767 }
5768 }
5769 }
5770
5771 TRACE_INIT_ID(ik);
5772
5773 // If we reach here, all is well.
5774 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5775 // in order for it to not be destroyed in the ClassFileParser destructor.
5776 set_klass_to_deallocate(NULL);
5777
5778 // it's official
5779 set_klass(ik);
5780
5781 debug_only(ik->verify();)
5782 }
5783
5784 // For an anonymous class that is in the unnamed package, move it to its host class's
5785 // package by prepending its host class's package name to its class name and setting
5786 // its _class_name field.
5787 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5788 ResourceMark rm(THREAD);
5789 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5790 "Anonymous class should not be in a package");
5791 const char* host_pkg_name =
5792 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5793
5794 if (host_pkg_name != NULL) {
5795 size_t host_pkg_len = strlen(host_pkg_name);
5796 int class_name_len = _class_name->utf8_length();
5797 char* new_anon_name =
5798 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5799 // Copy host package name and trailing /.
5800 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5801 new_anon_name[host_pkg_len] = '/';
5802 // Append anonymous class name. The anonymous class name can contain odd
5803 // characters. So, do a strncpy instead of using sprintf("%s...").
5804 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5805
5806 // Create a symbol and update the anonymous class name.
5807 _class_name = SymbolTable::new_symbol(new_anon_name,
5808 (int)host_pkg_len + 1 + class_name_len,
5809 CHECK);
5810 }
5811 }
5812
5813 // If the host class and the anonymous class are in the same package then do
5814 // nothing. If the anonymous class is in the unnamed package then move it to its
5815 // host's package. If the classes are in different packages then throw an IAE
5816 // exception.
5817 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5818 assert(_host_klass != NULL, "Expected an anonymous class");
5819
5820 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5821 _class_name->utf8_length(), '/');
5822 if (anon_last_slash == NULL) { // Unnamed package
5823 prepend_host_package_name(_host_klass, CHECK);
5824 } else {
5825 if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) {
5826 ResourceMark rm(THREAD);
5827 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5828 err_msg("Host class %s and anonymous class %s are in different packages",
5829 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5830 }
5831 }
5832 }
5833
5834 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5835 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5836 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5837 bool need_verify =
5838 // verifyAll
5839 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5840 // verifyRemote
5841 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5842 return !need_verify;
5843 }
5844
5845 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5846 Symbol* name,
5847 ClassLoaderData* loader_data,
5848 Handle protection_domain,
5849 const InstanceKlass* host_klass,
5850 GrowableArray<Handle>* cp_patches,
5851 Publicity pub_level,
5852 TRAPS) :
5853 _stream(stream),
5854 _requested_name(name),
5855 _loader_data(loader_data),
5856 _host_klass(host_klass),
5857 _cp_patches(cp_patches),
5858 _num_patched_klasses(0),
5859 _max_num_patched_klasses(0),
5860 _orig_cp_size(0),
5861 _first_patched_klass_resolved_index(0),
5862 _super_klass(),
5863 _cp(NULL),
5864 _fields(NULL),
5865 _methods(NULL),
5866 _inner_classes(NULL),
5867 _local_interfaces(NULL),
5868 _transitive_interfaces(NULL),
5869 _combined_annotations(NULL),
5870 _annotations(NULL),
5871 _type_annotations(NULL),
5872 _fields_annotations(NULL),
5873 _fields_type_annotations(NULL),
5874 _klass(NULL),
5875 _klass_to_deallocate(NULL),
5876 _parsed_annotations(NULL),
5877 _fac(NULL),
5878 _field_info(NULL),
5879 _method_ordering(NULL),
5880 _all_mirandas(NULL),
5881 _vtable_size(0),
5882 _itable_size(0),
5883 _num_miranda_methods(0),
5884 _rt(REF_NONE),
5885 _protection_domain(protection_domain),
5886 _access_flags(),
5887 _pub_level(pub_level),
5888 _bad_constant_seen(0),
5889 _synthetic_flag(false),
5890 _sde_length(false),
5891 _sde_buffer(NULL),
5892 _sourcefile_index(0),
5893 _generic_signature_index(0),
5894 _major_version(0),
5895 _minor_version(0),
5896 _this_class_index(0),
5897 _super_class_index(0),
5898 _itfs_len(0),
5899 _java_fields_count(0),
5900 _need_verify(false),
5901 _relax_verify(false),
5902 _has_nonstatic_concrete_methods(false),
5903 _declares_nonstatic_concrete_methods(false),
5904 _has_final_method(false),
5905 _has_finalizer(false),
5906 _has_empty_finalizer(false),
5907 _has_vanilla_constructor(false),
5908 _max_bootstrap_specifier_index(-1),
5909 _has_value_fields(false) {
5910
5911 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5912
5913 assert(THREAD->is_Java_thread(), "invariant");
5914 assert(_loader_data != NULL, "invariant");
5915 assert(stream != NULL, "invariant");
5916 assert(_stream != NULL, "invariant");
5917 assert(_stream->buffer() == _stream->current(), "invariant");
5918 assert(_class_name != NULL, "invariant");
5919 assert(0 == _access_flags.as_int(), "invariant");
5920
5921 // Figure out whether we can skip format checking (matching classic VM behavior)
5922 if (DumpSharedSpaces) {
5923 // verify == true means it's a 'remote' class (i.e., non-boot class)
5924 // Verification decision is based on BytecodeVerificationRemote flag
5925 // for those classes.
5926 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5927 BytecodeVerificationLocal;
5928 }
5929 else {
5930 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5931 stream->need_verify());
5932 }
5933 if (_cp_patches != NULL) {
5934 int len = _cp_patches->length();
5935 for (int i=0; i<len; i++) {
5936 if (has_cp_patch_at(i)) {
5937 Handle patch = cp_patch_at(i);
5938 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5939 // We need to append the names of the patched classes to the end of the constant pool,
5940 // because a patched class may have a Utf8 name that's not already included in the
5941 // original constant pool. These class names are used when patch_constant_pool()
5942 // calls patch_class().
5943 //
5944 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5945 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5946 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5947 _max_num_patched_klasses++;
5948 }
5949 }
5950 }
5951 }
5952
5953 // synch back verification state to stream
5954 stream->set_verify(_need_verify);
5955
5956 // Check if verification needs to be relaxed for this class file
5957 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5958 _relax_verify = relax_format_check_for(_loader_data);
5959
5960 parse_stream(stream, CHECK);
5961
5962 post_process_parsed_stream(stream, _cp, CHECK);
5963 }
5964
5965 void ClassFileParser::clear_class_metadata() {
5966 // metadata created before the instance klass is created. Must be
5967 // deallocated if classfile parsing returns an error.
5968 _cp = NULL;
5969 _fields = NULL;
5970 _methods = NULL;
5971 _inner_classes = NULL;
5972 _local_interfaces = NULL;
5973 _transitive_interfaces = NULL;
5974 _combined_annotations = NULL;
5975 _annotations = _type_annotations = NULL;
5976 _fields_annotations = _fields_type_annotations = NULL;
5977 }
5978
5979 // Destructor to clean up
5980 ClassFileParser::~ClassFileParser() {
5981 if (_cp != NULL) {
5982 MetadataFactory::free_metadata(_loader_data, _cp);
5983 }
5984 if (_fields != NULL) {
5985 MetadataFactory::free_array<u2>(_loader_data, _fields);
5986 }
5987
5988 if (_methods != NULL) {
5989 // Free methods
5990 InstanceKlass::deallocate_methods(_loader_data, _methods);
5991 }
5992
5993 // beware of the Universe::empty_blah_array!!
5994 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5995 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5996 }
5997
5998 // Free interfaces
5999 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6000 _local_interfaces, _transitive_interfaces);
6001
6002 if (_combined_annotations != NULL) {
6003 // After all annotations arrays have been created, they are installed into the
6004 // Annotations object that will be assigned to the InstanceKlass being created.
6005
6006 // Deallocate the Annotations object and the installed annotations arrays.
6007 _combined_annotations->deallocate_contents(_loader_data);
6008
6009 // If the _combined_annotations pointer is non-NULL,
6010 // then the other annotations fields should have been cleared.
6011 assert(_annotations == NULL, "Should have been cleared");
6012 assert(_type_annotations == NULL, "Should have been cleared");
6013 assert(_fields_annotations == NULL, "Should have been cleared");
6014 assert(_fields_type_annotations == NULL, "Should have been cleared");
6015 } else {
6016 // If the annotations arrays were not installed into the Annotations object,
6017 // then they have to be deallocated explicitly.
6018 MetadataFactory::free_array<u1>(_loader_data, _annotations);
6019 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6020 Annotations::free_contents(_loader_data, _fields_annotations);
6021 Annotations::free_contents(_loader_data, _fields_type_annotations);
6022 }
6023
6024 clear_class_metadata();
6025
6026 // deallocate the klass if already created. Don't directly deallocate, but add
6027 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6028 // at a safepoint.
6029 if (_klass_to_deallocate != NULL) {
6030 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6031 }
6032 }
6033
6034 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6035 TRAPS) {
6036
6037 assert(stream != NULL, "invariant");
6038 assert(_class_name != NULL, "invariant");
6039
6040 // BEGIN STREAM PARSING
6041 stream->guarantee_more(8, CHECK); // magic, major, minor
6042 // Magic value
6043 const u4 magic = stream->get_u4_fast();
6044 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6045 "Incompatible magic value %u in class file %s",
6046 magic, CHECK);
6047
6048 // Version numbers
6049 _minor_version = stream->get_u2_fast();
6050 _major_version = stream->get_u2_fast();
6051
6052 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6053 ResourceMark rm;
6054 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6055 _major_version, _minor_version, _class_name->as_C_string());
6056 Exceptions::fthrow(
6057 THREAD_AND_LOCATION,
6058 vmSymbols::java_lang_UnsupportedClassVersionError(),
6059 "Unsupported major.minor version for dump time %u.%u",
6060 _major_version,
6061 _minor_version);
6062 }
6063
6064 // Check version numbers - we check this even with verifier off
6065 if (!is_supported_version(_major_version, _minor_version)) {
6066 ResourceMark rm(THREAD);
6067 Exceptions::fthrow(
6068 THREAD_AND_LOCATION,
6069 vmSymbols::java_lang_UnsupportedClassVersionError(),
6070 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
6071 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
6072 _class_name->as_C_string(),
6073 _major_version,
6074 _minor_version,
6075 JAVA_MAX_SUPPORTED_VERSION,
6076 JAVA_MAX_SUPPORTED_MINOR_VERSION);
6077 return;
6078 }
6079
6080 stream->guarantee_more(3, CHECK); // length, first cp tag
6081 u2 cp_size = stream->get_u2_fast();
6082
6083 guarantee_property(
6084 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6085 cp_size, CHECK);
6086
6087 _orig_cp_size = cp_size;
6088 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6089 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6090 }
6091 cp_size += _max_num_patched_klasses;
6092
6093 _cp = ConstantPool::allocate(_loader_data,
6094 cp_size,
6095 CHECK);
6096
6097 ConstantPool* const cp = _cp;
6098
6099 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6100
6101 assert(cp_size == (const u2)cp->length(), "invariant");
6102
6103 // ACCESS FLAGS
6104 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6105
6106 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6107 // JVM_ACC_MODULE is defined in JDK-9 and later.
6108 if (_major_version >= JAVA_9_VERSION) {
6109 recognized_modifiers |= JVM_ACC_MODULE;
6110 }
6111 // JVM_ACC_VALUE is defined for class file version 53.1 and later
6112 if (supports_value_types()) {
6113 recognized_modifiers |= JVM_ACC_VALUE;
6114 }
6115
6116 // Access flags
6117 jint flags = stream->get_u2_fast() & recognized_modifiers;
6118
6119 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6120 // Set abstract bit for old class files for backward compatibility
6121 flags |= JVM_ACC_ABSTRACT;
6122 }
6123
6124 verify_legal_class_modifiers(flags, CHECK);
6125
6126 short bad_constant = class_bad_constant_seen();
6127 if (bad_constant != 0) {
6128 // Do not throw CFE until after the access_flags are checked because if
6129 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6130 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6131 }
6132
6133 _access_flags.set_flags(flags);
6134
6135 // This class and superclass
6136 _this_class_index = stream->get_u2_fast();
6137 check_property(
6138 (valid_cp_range(_this_class_index, cp_size) &&
6139 (cp->tag_at(_this_class_index).is_unresolved_klass() ||
6140 cp->tag_at(_this_class_index).is_unresolved_value_type())),
6141 "Invalid this class index %u in constant pool in class file %s",
6142 _this_class_index, CHECK);
6143
6144 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6145 assert(class_name_in_cp != NULL, "class_name can't be null");
6146
6147 // Update _class_name which could be null previously
6148 // to reflect the name in the constant pool
6149 _class_name = class_name_in_cp;
6150
6151 // Don't need to check whether this class name is legal or not.
6152 // It has been checked when constant pool is parsed.
6153 // However, make sure it is not an array type.
6154 if (_need_verify) {
6155 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
6156 "Bad class name in class file %s",
6157 CHECK);
6158 }
6159
6160 // Checks if name in class file matches requested name
6161 if (_requested_name != NULL && _requested_name != _class_name) {
6162 ResourceMark rm(THREAD);
6163 Exceptions::fthrow(
6164 THREAD_AND_LOCATION,
6165 vmSymbols::java_lang_NoClassDefFoundError(),
6166 "%s (wrong name: %s)",
6167 _class_name->as_C_string(),
6168 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6169 );
6170 return;
6171 }
6172
6173 // if this is an anonymous class fix up its name if it's in the unnamed
6174 // package. Otherwise, throw IAE if it is in a different package than
6175 // its host class.
6176 if (_host_klass != NULL) {
6177 fix_anonymous_class_name(CHECK);
6178 }
6179
6180 // Verification prevents us from creating names with dots in them, this
6181 // asserts that that's the case.
6182 assert(is_internal_format(_class_name), "external class name format used internally");
6183
6184 if (!is_internal()) {
6185 LogTarget(Debug, class, preorder) lt;
6186 if (lt.is_enabled()){
6187 ResourceMark rm(THREAD);
6188 LogStream ls(lt);
6189 ls.print("%s", _class_name->as_klass_external_name());
6190 if (stream->source() != NULL) {
6191 ls.print(" source: %s", stream->source());
6192 }
6193 ls.cr();
6194 }
6195
6196 #if INCLUDE_CDS
6197 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6198 // Only dump the classes that can be stored into CDS archive.
6199 // Anonymous classes such as generated LambdaForm classes are also not included.
6200 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6201 _host_klass == NULL) {
6202 oop class_loader = _loader_data->class_loader();
6203 ResourceMark rm(THREAD);
6204 // For the boot and platform class loaders, check if the class is not found in the
6205 // java runtime image. Additional check for the boot class loader is if the class
6206 // is not found in the boot loader's appended entries. This indicates that the class
6207 // is not useable during run time, such as the ones found in the --patch-module entries,
6208 // so it should not be included in the classlist file.
6209 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
6210 SystemDictionary::is_platform_class_loader(class_loader)) &&
6211 !ClassLoader::is_jrt(stream->source())) {
6212 tty->print_cr("skip writing class %s from source %s to classlist file",
6213 _class_name->as_C_string(), stream->source());
6214 } else {
6215 classlist_file->print_cr("%s", _class_name->as_C_string());
6216 classlist_file->flush();
6217 }
6218 }
6219 }
6220 #endif
6221 }
6222
6223 // SUPERKLASS
6224 _super_class_index = stream->get_u2_fast();
6225 _super_klass = parse_super_class(cp,
6226 _super_class_index,
6227 _need_verify,
6228 CHECK);
6229
6230 // Interfaces
6231 _itfs_len = stream->get_u2_fast();
6232 parse_interfaces(stream,
6233 _itfs_len,
6234 cp,
6235 &_has_nonstatic_concrete_methods,
6236 CHECK);
6237
6238 assert(_local_interfaces != NULL, "invariant");
6239
6240 // Fields (offsets are filled in later)
6241 _fac = new FieldAllocationCount();
6242 parse_fields(stream,
6243 _access_flags.is_interface(),
6244 _fac,
6245 cp,
6246 cp_size,
6247 &_java_fields_count,
6248 CHECK);
6249
6250 assert(_fields != NULL, "invariant");
6251
6252 // Methods
6253 AccessFlags promoted_flags;
6254 parse_methods(stream,
6255 _access_flags.is_interface(),
6256 &promoted_flags,
6257 &_has_final_method,
6258 &_declares_nonstatic_concrete_methods,
6259 CHECK);
6260
6261 assert(_methods != NULL, "invariant");
6262
6263 // promote flags from parse_methods() to the klass' flags
6264 _access_flags.add_promoted_flags(promoted_flags.as_int());
6265
6266 if (_declares_nonstatic_concrete_methods) {
6267 _has_nonstatic_concrete_methods = true;
6268 }
6269
6270 // Additional attributes/annotations
6271 _parsed_annotations = new ClassAnnotationCollector();
6272 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6273
6274 assert(_inner_classes != NULL, "invariant");
6275
6276 // Finalize the Annotations metadata object,
6277 // now that all annotation arrays have been created.
6278 create_combined_annotations(CHECK);
6279
6280 // Make sure this is the end of class file stream
6281 guarantee_property(stream->at_eos(),
6282 "Extra bytes at the end of class file %s",
6283 CHECK);
6284
6285 // all bytes in stream read and parsed
6286 }
6287
6288 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6289 ConstantPool* cp,
6290 TRAPS) {
6291 assert(stream != NULL, "invariant");
6292 assert(stream->at_eos(), "invariant");
6293 assert(cp != NULL, "invariant");
6294 assert(_loader_data != NULL, "invariant");
6295
6296 if (_class_name == vmSymbols::java_lang_Object()) {
6297 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6298 "java.lang.Object cannot implement an interface in class file %s",
6299 CHECK);
6300 }
6301 // We check super class after class file is parsed and format is checked
6302 if (_super_class_index > 0 && NULL ==_super_klass) {
6303 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6304 if (_access_flags.is_interface()) {
6305 // Before attempting to resolve the superclass, check for class format
6306 // errors not checked yet.
6307 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6308 "Interfaces must have java.lang.Object as superclass in class file %s",
6309 CHECK);
6310 }
6311 Handle loader(THREAD, _loader_data->class_loader());
6312 _super_klass = (const InstanceKlass*)
6313 SystemDictionary::resolve_super_or_fail(_class_name,
6314 super_class_name,
6315 loader,
6316 _protection_domain,
6317 true,
6318 CHECK);
6319 }
6320
6321 if (_super_klass != NULL) {
6322 if (_super_klass->has_nonstatic_concrete_methods()) {
6323 _has_nonstatic_concrete_methods = true;
6324 }
6325
6326 if (_super_klass->is_interface()) {
6327 ResourceMark rm(THREAD);
6328 Exceptions::fthrow(
6329 THREAD_AND_LOCATION,
6330 vmSymbols::java_lang_IncompatibleClassChangeError(),
6331 "class %s has interface %s as super class",
6332 _class_name->as_klass_external_name(),
6333 _super_klass->external_name()
6334 );
6335 return;
6336 }
6337
6338 // For a java/lang/__Value super class, the class inheriting, must be a value class
6339 if ((EnableValhalla || EnableMVT) &&
6340 _super_klass->name() == vmSymbols::java_lang____Value()) {
6341 guarantee_property((_access_flags.get_flags() & JVM_ACC_VALUE) != 0,
6342 "Only a value class can inherit from java/lang/__Value",
6343 CHECK);
6344 }
6345
6346 // For a value class, only java/lang/__Value is an acceptable super class
6347 if ((EnableValhalla || EnableMVT) &&
6348 _access_flags.get_flags() & JVM_ACC_VALUE) {
6349 guarantee_property(_super_klass->name() == vmSymbols::java_lang____Value(),
6350 "Value class can only inherit java/lang/__Value",
6351 CHECK);
6352 }
6353
6354 // Make sure super class is not final
6355 if (_super_klass->is_final()
6356 && !(_super_klass->name() == vmSymbols::java_lang____Value()
6357 && (_access_flags.get_flags() & JVM_ACC_VALUE))) {
6358 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6359 }
6360 }
6361
6362 // Compute the transitive list of all unique interfaces implemented by this class
6363 _transitive_interfaces =
6364 compute_transitive_interfaces(_super_klass,
6365 _local_interfaces,
6366 _loader_data,
6367 CHECK);
6368
6369 assert(_transitive_interfaces != NULL, "invariant");
6370
6371 // sort methods
6372 _method_ordering = sort_methods(_methods);
6373
6374 _all_mirandas = new GrowableArray<Method*>(20);
6375
6376 Handle loader(THREAD, _loader_data->class_loader());
6377 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6378 &_num_miranda_methods,
6379 _all_mirandas,
6380 _super_klass,
6381 _methods,
6382 _access_flags,
6383 _major_version,
6384 loader,
6385 _class_name,
6386 _local_interfaces,
6387 CHECK);
6388
6389 // Size of Java itable (in words)
6390 _itable_size = _access_flags.is_interface() ? 0 :
6391 klassItable::compute_itable_size(_transitive_interfaces);
6392
6393 assert(_fac != NULL, "invariant");
6394 assert(_parsed_annotations != NULL, "invariant");
6395
6396 _field_info = new FieldLayoutInfo();
6397 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6398
6399 // Compute reference typ
6400 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6401
6402 }
6403
6404 void ClassFileParser::set_klass(InstanceKlass* klass) {
6405
6406 #ifdef ASSERT
6407 if (klass != NULL) {
6408 assert(NULL == _klass, "leaking?");
6409 }
6410 #endif
6411
6412 _klass = klass;
6413 }
6414
6415 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6416
6417 #ifdef ASSERT
6418 if (klass != NULL) {
6419 assert(NULL == _klass_to_deallocate, "leaking?");
6420 }
6421 #endif
6422
6423 _klass_to_deallocate = klass;
6424 }
6425
6426 // Caller responsible for ResourceMark
6427 // clone stream with rewound position
6428 const ClassFileStream* ClassFileParser::clone_stream() const {
6429 assert(_stream != NULL, "invariant");
6430
6431 return _stream->clone();
6432 }
6433
6434 bool ClassFileParser::is_value_capable_class() const {
6435 return _parsed_annotations->is_value_capable_class();
6436 }
6437
6438 // ----------------------------------------------------------------------------
6439 // debugging
6440
6441 #ifdef ASSERT
6442
6443 // return true if class_name contains no '.' (internal format is '/')
6444 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6445 if (class_name != NULL) {
6446 ResourceMark rm;
6447 char* name = class_name->as_C_string();
6448 return strchr(name, '.') == NULL;
6449 } else {
6450 return true;
6451 }
6452 }
6453
6454 #endif