1/*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24#include "precompiled.hpp"
25#include "jvm.h"
26#include "aot/aotLoader.hpp"
27#include "classfile/classFileParser.hpp"
28#include "classfile/classFileStream.hpp"
29#include "classfile/classLoader.hpp"
30#include "classfile/classLoaderData.inline.hpp"
31#include "classfile/defaultMethods.hpp"
32#include "classfile/dictionary.hpp"
33#include "classfile/javaClasses.inline.hpp"
34#include "classfile/moduleEntry.hpp"
35#include "classfile/packageEntry.hpp"
36#include "classfile/symbolTable.hpp"
37#include "classfile/systemDictionary.hpp"
38#include "classfile/verificationType.hpp"
39#include "classfile/verifier.hpp"
40#include "classfile/vmSymbols.hpp"
41#include "logging/log.hpp"
42#include "logging/logStream.hpp"
43#include "memory/allocation.hpp"
44#include "memory/metadataFactory.hpp"
45#include "memory/oopFactory.hpp"
46#include "memory/resourceArea.hpp"
47#include "memory/universe.hpp"
48#include "oops/annotations.hpp"
49#include "oops/constantPool.inline.hpp"
50#include "oops/fieldStreams.hpp"
51#include "oops/instanceKlass.hpp"
52#include "oops/instanceMirrorKlass.hpp"
53#include "oops/klass.inline.hpp"
54#include "oops/klassVtable.hpp"
55#include "oops/metadata.hpp"
56#include "oops/method.inline.hpp"
57#include "oops/oop.inline.hpp"
58#include "oops/symbol.hpp"
59#include "prims/jvmtiExport.hpp"
60#include "prims/jvmtiThreadState.hpp"
61#include "runtime/arguments.hpp"
62#include "runtime/handles.inline.hpp"
63#include "runtime/javaCalls.hpp"
64#include "runtime/os.hpp"
65#include "runtime/perfData.hpp"
66#include "runtime/reflection.hpp"
67#include "runtime/safepointVerifiers.hpp"
68#include "runtime/signature.hpp"
69#include "runtime/timer.hpp"
70#include "services/classLoadingService.hpp"
71#include "services/threadService.hpp"
72#include "utilities/align.hpp"
73#include "utilities/bitMap.inline.hpp"
74#include "utilities/copy.hpp"
75#include "utilities/exceptions.hpp"
76#include "utilities/globalDefinitions.hpp"
77#include "utilities/growableArray.hpp"
78#include "utilities/macros.hpp"
79#include "utilities/ostream.hpp"
80#include "utilities/resourceHash.hpp"
81#include "utilities/utf8.hpp"
82
83#if INCLUDE_CDS
84#include "classfile/systemDictionaryShared.hpp"
85#endif
86#if INCLUDE_JFR
87#include "jfr/support/jfrTraceIdExtension.hpp"
88#endif
89
90// We generally try to create the oops directly when parsing, rather than
91// allocating temporary data structures and copying the bytes twice. A
92// temporary area is only needed when parsing utf8 entries in the constant
93// pool and when parsing line number tables.
94
95// We add assert in debug mode when class format is not checked.
96
97#define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
98#define JAVA_MIN_SUPPORTED_VERSION 45
99#define JAVA_PREVIEW_MINOR_VERSION 65535
100
101// Used for two backward compatibility reasons:
102// - to check for new additions to the class file format in JDK1.5
103// - to check for bug fixes in the format checker in JDK1.5
104#define JAVA_1_5_VERSION 49
105
106// Used for backward compatibility reasons:
107// - to check for javac bug fixes that happened after 1.5
108// - also used as the max version when running in jdk6
109#define JAVA_6_VERSION 50
110
111// Used for backward compatibility reasons:
112// - to disallow argument and require ACC_STATIC for <clinit> methods
113#define JAVA_7_VERSION 51
114
115// Extension method support.
116#define JAVA_8_VERSION 52
117
118#define JAVA_9_VERSION 53
119
120#define JAVA_10_VERSION 54
121
122#define JAVA_11_VERSION 55
123
124#define JAVA_12_VERSION 56
125
126#define JAVA_13_VERSION 57
127
128void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
129 assert((bad_constant == JVM_CONSTANT_Module ||
130 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
131 "Unexpected bad constant pool entry");
132 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
133}
134
135void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
136 ConstantPool* cp,
137 const int length,
138 TRAPS) {
139 assert(stream != NULL, "invariant");
140 assert(cp != NULL, "invariant");
141
142 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
143 // this function (_current can be allocated in a register, with scalar
144 // replacement of aggregates). The _current pointer is copied back to
145 // stream() when this function returns. DON'T call another method within
146 // this method that uses stream().
147 const ClassFileStream cfs1 = *stream;
148 const ClassFileStream* const cfs = &cfs1;
149
150 assert(cfs->allocated_on_stack(), "should be local");
151 debug_only(const u1* const old_current = stream->current();)
152
153 // Used for batching symbol allocations.
154 const char* names[SymbolTable::symbol_alloc_batch_size];
155 int lengths[SymbolTable::symbol_alloc_batch_size];
156 int indices[SymbolTable::symbol_alloc_batch_size];
157 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
158 int names_count = 0;
159
160 // parsing Index 0 is unused
161 for (int index = 1; index < length; index++) {
162 // Each of the following case guarantees one more byte in the stream
163 // for the following tag or the access_flags following constant pool,
164 // so we don't need bounds-check for reading tag.
165 const u1 tag = cfs->get_u1_fast();
166 switch (tag) {
167 case JVM_CONSTANT_Class : {
168 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
169 const u2 name_index = cfs->get_u2_fast();
170 cp->klass_index_at_put(index, name_index);
171 break;
172 }
173 case JVM_CONSTANT_Fieldref: {
174 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
175 const u2 class_index = cfs->get_u2_fast();
176 const u2 name_and_type_index = cfs->get_u2_fast();
177 cp->field_at_put(index, class_index, name_and_type_index);
178 break;
179 }
180 case JVM_CONSTANT_Methodref: {
181 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
182 const u2 class_index = cfs->get_u2_fast();
183 const u2 name_and_type_index = cfs->get_u2_fast();
184 cp->method_at_put(index, class_index, name_and_type_index);
185 break;
186 }
187 case JVM_CONSTANT_InterfaceMethodref: {
188 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
189 const u2 class_index = cfs->get_u2_fast();
190 const u2 name_and_type_index = cfs->get_u2_fast();
191 cp->interface_method_at_put(index, class_index, name_and_type_index);
192 break;
193 }
194 case JVM_CONSTANT_String : {
195 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
196 const u2 string_index = cfs->get_u2_fast();
197 cp->string_index_at_put(index, string_index);
198 break;
199 }
200 case JVM_CONSTANT_MethodHandle :
201 case JVM_CONSTANT_MethodType: {
202 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
203 classfile_parse_error(
204 "Class file version does not support constant tag %u in class file %s",
205 tag, CHECK);
206 }
207 if (tag == JVM_CONSTANT_MethodHandle) {
208 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
209 const u1 ref_kind = cfs->get_u1_fast();
210 const u2 method_index = cfs->get_u2_fast();
211 cp->method_handle_index_at_put(index, ref_kind, method_index);
212 }
213 else if (tag == JVM_CONSTANT_MethodType) {
214 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
215 const u2 signature_index = cfs->get_u2_fast();
216 cp->method_type_index_at_put(index, signature_index);
217 }
218 else {
219 ShouldNotReachHere();
220 }
221 break;
222 }
223 case JVM_CONSTANT_Dynamic : {
224 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
225 classfile_parse_error(
226 "Class file version does not support constant tag %u in class file %s",
227 tag, CHECK);
228 }
229 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
230 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
231 const u2 name_and_type_index = cfs->get_u2_fast();
232 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
233 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
234 }
235 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
236 break;
237 }
238 case JVM_CONSTANT_InvokeDynamic : {
239 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
240 classfile_parse_error(
241 "Class file version does not support constant tag %u in class file %s",
242 tag, CHECK);
243 }
244 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
245 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
246 const u2 name_and_type_index = cfs->get_u2_fast();
247 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
248 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
249 }
250 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
251 break;
252 }
253 case JVM_CONSTANT_Integer: {
254 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
255 const u4 bytes = cfs->get_u4_fast();
256 cp->int_at_put(index, (jint)bytes);
257 break;
258 }
259 case JVM_CONSTANT_Float: {
260 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
261 const u4 bytes = cfs->get_u4_fast();
262 cp->float_at_put(index, *(jfloat*)&bytes);
263 break;
264 }
265 case JVM_CONSTANT_Long: {
266 // A mangled type might cause you to overrun allocated memory
267 guarantee_property(index + 1 < length,
268 "Invalid constant pool entry %u in class file %s",
269 index,
270 CHECK);
271 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
272 const u8 bytes = cfs->get_u8_fast();
273 cp->long_at_put(index, bytes);
274 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
275 break;
276 }
277 case JVM_CONSTANT_Double: {
278 // A mangled type might cause you to overrun allocated memory
279 guarantee_property(index+1 < length,
280 "Invalid constant pool entry %u in class file %s",
281 index,
282 CHECK);
283 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
284 const u8 bytes = cfs->get_u8_fast();
285 cp->double_at_put(index, *(jdouble*)&bytes);
286 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
287 break;
288 }
289 case JVM_CONSTANT_NameAndType: {
290 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
291 const u2 name_index = cfs->get_u2_fast();
292 const u2 signature_index = cfs->get_u2_fast();
293 cp->name_and_type_at_put(index, name_index, signature_index);
294 break;
295 }
296 case JVM_CONSTANT_Utf8 : {
297 cfs->guarantee_more(2, CHECK); // utf8_length
298 u2 utf8_length = cfs->get_u2_fast();
299 const u1* utf8_buffer = cfs->current();
300 assert(utf8_buffer != NULL, "null utf8 buffer");
301 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
302 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
303 cfs->skip_u1_fast(utf8_length);
304
305 // Before storing the symbol, make sure it's legal
306 if (_need_verify) {
307 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
308 }
309
310 if (has_cp_patch_at(index)) {
311 Handle patch = clear_cp_patch_at(index);
312 guarantee_property(java_lang_String::is_instance(patch()),
313 "Illegal utf8 patch at %d in class file %s",
314 index,
315 CHECK);
316 const char* const str = java_lang_String::as_utf8_string(patch());
317 // (could use java_lang_String::as_symbol instead, but might as well batch them)
318 utf8_buffer = (const u1*) str;
319 utf8_length = (u2) strlen(str);
320 }
321
322 unsigned int hash;
323 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
324 utf8_length,
325 hash);
326 if (result == NULL) {
327 names[names_count] = (const char*)utf8_buffer;
328 lengths[names_count] = utf8_length;
329 indices[names_count] = index;
330 hashValues[names_count++] = hash;
331 if (names_count == SymbolTable::symbol_alloc_batch_size) {
332 SymbolTable::new_symbols(_loader_data,
333 cp,
334 names_count,
335 names,
336 lengths,
337 indices,
338 hashValues);
339 names_count = 0;
340 }
341 } else {
342 cp->symbol_at_put(index, result);
343 }
344 break;
345 }
346 case JVM_CONSTANT_Module:
347 case JVM_CONSTANT_Package: {
348 // Record that an error occurred in these two cases but keep parsing so
349 // that ACC_Module can be checked for in the access_flags. Need to
350 // throw NoClassDefFoundError in that case.
351 if (_major_version >= JAVA_9_VERSION) {
352 cfs->guarantee_more(3, CHECK);
353 cfs->get_u2_fast();
354 set_class_bad_constant_seen(tag);
355 break;
356 }
357 }
358 default: {
359 classfile_parse_error("Unknown constant tag %u in class file %s",
360 tag,
361 CHECK);
362 break;
363 }
364 } // end of switch(tag)
365 } // end of for
366
367 // Allocate the remaining symbols
368 if (names_count > 0) {
369 SymbolTable::new_symbols(_loader_data,
370 cp,
371 names_count,
372 names,
373 lengths,
374 indices,
375 hashValues);
376 }
377
378 // Copy _current pointer of local copy back to stream.
379 assert(stream->current() == old_current, "non-exclusive use of stream");
380 stream->set_current(cfs1.current());
381
382}
383
384static inline bool valid_cp_range(int index, int length) {
385 return (index > 0 && index < length);
386}
387
388static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
389 assert(cp != NULL, "invariant");
390 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
391 return cp->symbol_at(index);
392 }
393 return NULL;
394}
395
396#ifdef ASSERT
397PRAGMA_DIAG_PUSH
398PRAGMA_FORMAT_NONLITERAL_IGNORED
399void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
400 ResourceMark rm(THREAD);
401 fatal(msg, _class_name->as_C_string());
402}
403
404void ClassFileParser::report_assert_property_failure(const char* msg,
405 int index,
406 TRAPS) const {
407 ResourceMark rm(THREAD);
408 fatal(msg, index, _class_name->as_C_string());
409}
410PRAGMA_DIAG_POP
411#endif
412
413void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
414 ConstantPool* const cp,
415 const int length,
416 TRAPS) {
417 assert(cp != NULL, "invariant");
418 assert(stream != NULL, "invariant");
419
420 // parsing constant pool entries
421 parse_constant_pool_entries(stream, cp, length, CHECK);
422 if (class_bad_constant_seen() != 0) {
423 // a bad CP entry has been detected previously so stop parsing and just return.
424 return;
425 }
426
427 int index = 1; // declared outside of loops for portability
428 int num_klasses = 0;
429
430 // first verification pass - validate cross references
431 // and fixup class and string constants
432 for (index = 1; index < length; index++) { // Index 0 is unused
433 const jbyte tag = cp->tag_at(index).value();
434 switch (tag) {
435 case JVM_CONSTANT_Class: {
436 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
437 break;
438 }
439 case JVM_CONSTANT_Fieldref:
440 // fall through
441 case JVM_CONSTANT_Methodref:
442 // fall through
443 case JVM_CONSTANT_InterfaceMethodref: {
444 if (!_need_verify) break;
445 const int klass_ref_index = cp->klass_ref_index_at(index);
446 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
447 check_property(valid_klass_reference_at(klass_ref_index),
448 "Invalid constant pool index %u in class file %s",
449 klass_ref_index, CHECK);
450 check_property(valid_cp_range(name_and_type_ref_index, length) &&
451 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
452 "Invalid constant pool index %u in class file %s",
453 name_and_type_ref_index, CHECK);
454 break;
455 }
456 case JVM_CONSTANT_String: {
457 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
458 break;
459 }
460 case JVM_CONSTANT_Integer:
461 break;
462 case JVM_CONSTANT_Float:
463 break;
464 case JVM_CONSTANT_Long:
465 case JVM_CONSTANT_Double: {
466 index++;
467 check_property(
468 (index < length && cp->tag_at(index).is_invalid()),
469 "Improper constant pool long/double index %u in class file %s",
470 index, CHECK);
471 break;
472 }
473 case JVM_CONSTANT_NameAndType: {
474 if (!_need_verify) break;
475 const int name_ref_index = cp->name_ref_index_at(index);
476 const int signature_ref_index = cp->signature_ref_index_at(index);
477 check_property(valid_symbol_at(name_ref_index),
478 "Invalid constant pool index %u in class file %s",
479 name_ref_index, CHECK);
480 check_property(valid_symbol_at(signature_ref_index),
481 "Invalid constant pool index %u in class file %s",
482 signature_ref_index, CHECK);
483 break;
484 }
485 case JVM_CONSTANT_Utf8:
486 break;
487 case JVM_CONSTANT_UnresolvedClass: // fall-through
488 case JVM_CONSTANT_UnresolvedClassInError: {
489 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
490 break;
491 }
492 case JVM_CONSTANT_ClassIndex: {
493 const int class_index = cp->klass_index_at(index);
494 check_property(valid_symbol_at(class_index),
495 "Invalid constant pool index %u in class file %s",
496 class_index, CHECK);
497 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
498 break;
499 }
500 case JVM_CONSTANT_StringIndex: {
501 const int string_index = cp->string_index_at(index);
502 check_property(valid_symbol_at(string_index),
503 "Invalid constant pool index %u in class file %s",
504 string_index, CHECK);
505 Symbol* const sym = cp->symbol_at(string_index);
506 cp->unresolved_string_at_put(index, sym);
507 break;
508 }
509 case JVM_CONSTANT_MethodHandle: {
510 const int ref_index = cp->method_handle_index_at(index);
511 check_property(valid_cp_range(ref_index, length),
512 "Invalid constant pool index %u in class file %s",
513 ref_index, CHECK);
514 const constantTag tag = cp->tag_at(ref_index);
515 const int ref_kind = cp->method_handle_ref_kind_at(index);
516
517 switch (ref_kind) {
518 case JVM_REF_getField:
519 case JVM_REF_getStatic:
520 case JVM_REF_putField:
521 case JVM_REF_putStatic: {
522 check_property(
523 tag.is_field(),
524 "Invalid constant pool index %u in class file %s (not a field)",
525 ref_index, CHECK);
526 break;
527 }
528 case JVM_REF_invokeVirtual:
529 case JVM_REF_newInvokeSpecial: {
530 check_property(
531 tag.is_method(),
532 "Invalid constant pool index %u in class file %s (not a method)",
533 ref_index, CHECK);
534 break;
535 }
536 case JVM_REF_invokeStatic:
537 case JVM_REF_invokeSpecial: {
538 check_property(
539 tag.is_method() ||
540 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
541 "Invalid constant pool index %u in class file %s (not a method)",
542 ref_index, CHECK);
543 break;
544 }
545 case JVM_REF_invokeInterface: {
546 check_property(
547 tag.is_interface_method(),
548 "Invalid constant pool index %u in class file %s (not an interface method)",
549 ref_index, CHECK);
550 break;
551 }
552 default: {
553 classfile_parse_error(
554 "Bad method handle kind at constant pool index %u in class file %s",
555 index, CHECK);
556 }
557 } // switch(refkind)
558 // Keep the ref_index unchanged. It will be indirected at link-time.
559 break;
560 } // case MethodHandle
561 case JVM_CONSTANT_MethodType: {
562 const int ref_index = cp->method_type_index_at(index);
563 check_property(valid_symbol_at(ref_index),
564 "Invalid constant pool index %u in class file %s",
565 ref_index, CHECK);
566 break;
567 }
568 case JVM_CONSTANT_Dynamic: {
569 const int name_and_type_ref_index =
570 cp->bootstrap_name_and_type_ref_index_at(index);
571
572 check_property(valid_cp_range(name_and_type_ref_index, length) &&
573 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
574 "Invalid constant pool index %u in class file %s",
575 name_and_type_ref_index, CHECK);
576 // bootstrap specifier index must be checked later,
577 // when BootstrapMethods attr is available
578
579 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
580 cp->set_has_dynamic_constant();
581 break;
582 }
583 case JVM_CONSTANT_InvokeDynamic: {
584 const int name_and_type_ref_index =
585 cp->bootstrap_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 const Symbol* const class_name = cp->klass_name_at(index);
646 // check the name, even if _cp_patches will overwrite it
647 verify_legal_class_name(class_name, CHECK);
648 break;
649 }
650 case JVM_CONSTANT_NameAndType: {
651 if (_need_verify) {
652 const int sig_index = cp->signature_ref_index_at(index);
653 const int name_index = cp->name_ref_index_at(index);
654 const Symbol* const name = cp->symbol_at(name_index);
655 const Symbol* const sig = cp->symbol_at(sig_index);
656 guarantee_property(sig->utf8_length() != 0,
657 "Illegal zero length constant pool entry at %d in class %s",
658 sig_index, CHECK);
659 guarantee_property(name->utf8_length() != 0,
660 "Illegal zero length constant pool entry at %d in class %s",
661 name_index, CHECK);
662
663 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
664 // Format check method name and signature
665 verify_legal_method_name(name, CHECK);
666 verify_legal_method_signature(name, sig, CHECK);
667 } else {
668 // Format check field name and signature
669 verify_legal_field_name(name, CHECK);
670 verify_legal_field_signature(name, sig, CHECK);
671 }
672 }
673 break;
674 }
675 case JVM_CONSTANT_Dynamic: {
676 const int name_and_type_ref_index =
677 cp->name_and_type_ref_index_at(index);
678 // already verified to be utf8
679 const int name_ref_index =
680 cp->name_ref_index_at(name_and_type_ref_index);
681 // already verified to be utf8
682 const int signature_ref_index =
683 cp->signature_ref_index_at(name_and_type_ref_index);
684 const Symbol* const name = cp->symbol_at(name_ref_index);
685 const Symbol* const signature = cp->symbol_at(signature_ref_index);
686 if (_need_verify) {
687 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
688 // Need only to be sure signature is non-zero length and the right type.
689 if (signature->utf8_length() == 0 ||
690 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
691 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
692 }
693 }
694 break;
695 }
696 case JVM_CONSTANT_InvokeDynamic:
697 case JVM_CONSTANT_Fieldref:
698 case JVM_CONSTANT_Methodref:
699 case JVM_CONSTANT_InterfaceMethodref: {
700 const int name_and_type_ref_index =
701 cp->name_and_type_ref_index_at(index);
702 // already verified to be utf8
703 const int name_ref_index =
704 cp->name_ref_index_at(name_and_type_ref_index);
705 // already verified to be utf8
706 const int signature_ref_index =
707 cp->signature_ref_index_at(name_and_type_ref_index);
708 const Symbol* const name = cp->symbol_at(name_ref_index);
709 const Symbol* const signature = cp->symbol_at(signature_ref_index);
710 if (tag == JVM_CONSTANT_Fieldref) {
711 if (_need_verify) {
712 // Field name and signature are verified above, when iterating NameAndType_info.
713 // Need only to be sure signature is non-zero length and the right type.
714 if (signature->utf8_length() == 0 ||
715 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
716 throwIllegalSignature("Field", name, signature, CHECK);
717 }
718 }
719 } else {
720 if (_need_verify) {
721 // Method name and signature are verified above, when iterating NameAndType_info.
722 // Need only to be sure signature is non-zero length and the right type.
723 if (signature->utf8_length() == 0 ||
724 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
725 throwIllegalSignature("Method", name, signature, CHECK);
726 }
727 }
728 // 4509014: If a class method name begins with '<', it must be "<init>"
729 const unsigned int name_len = name->utf8_length();
730 if (tag == JVM_CONSTANT_Methodref &&
731 name_len != 0 &&
732 name->char_at(0) == '<' &&
733 name != vmSymbols::object_initializer_name()) {
734 classfile_parse_error(
735 "Bad method name at constant pool index %u in class file %s",
736 name_ref_index, CHECK);
737 }
738 }
739 break;
740 }
741 case JVM_CONSTANT_MethodHandle: {
742 const int ref_index = cp->method_handle_index_at(index);
743 const int ref_kind = cp->method_handle_ref_kind_at(index);
744 switch (ref_kind) {
745 case JVM_REF_invokeVirtual:
746 case JVM_REF_invokeStatic:
747 case JVM_REF_invokeSpecial:
748 case JVM_REF_newInvokeSpecial: {
749 const int name_and_type_ref_index =
750 cp->name_and_type_ref_index_at(ref_index);
751 const int name_ref_index =
752 cp->name_ref_index_at(name_and_type_ref_index);
753 const Symbol* const name = cp->symbol_at(name_ref_index);
754 if (ref_kind == JVM_REF_newInvokeSpecial) {
755 if (name != vmSymbols::object_initializer_name()) {
756 classfile_parse_error(
757 "Bad constructor name at constant pool index %u in class file %s",
758 name_ref_index, CHECK);
759 }
760 } else {
761 if (name == vmSymbols::object_initializer_name()) {
762 classfile_parse_error(
763 "Bad method name at constant pool index %u in class file %s",
764 name_ref_index, CHECK);
765 }
766 }
767 break;
768 }
769 // Other ref_kinds are already fully checked in previous pass.
770 } // switch(ref_kind)
771 break;
772 }
773 case JVM_CONSTANT_MethodType: {
774 const Symbol* const no_name = vmSymbols::type_name(); // place holder
775 const Symbol* const signature = cp->method_type_signature_at(index);
776 verify_legal_method_signature(no_name, signature, CHECK);
777 break;
778 }
779 case JVM_CONSTANT_Utf8: {
780 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
781 }
782 } // switch(tag)
783 } // end of for
784}
785
786Handle ClassFileParser::clear_cp_patch_at(int index) {
787 Handle patch = cp_patch_at(index);
788 _cp_patches->at_put(index, Handle());
789 assert(!has_cp_patch_at(index), "");
790 return patch;
791}
792
793void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
794 int name_index = _orig_cp_size + _num_patched_klasses;
795 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
796
797 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
798 _num_patched_klasses ++;
799}
800
801void ClassFileParser::patch_constant_pool(ConstantPool* cp,
802 int index,
803 Handle patch,
804 TRAPS) {
805 assert(cp != NULL, "invariant");
806
807 BasicType patch_type = T_VOID;
808
809 switch (cp->tag_at(index).value()) {
810
811 case JVM_CONSTANT_UnresolvedClass: {
812 // Patching a class means pre-resolving it.
813 // The name in the constant pool is ignored.
814 if (java_lang_Class::is_instance(patch())) {
815 guarantee_property(!java_lang_Class::is_primitive(patch()),
816 "Illegal class patch at %d in class file %s",
817 index, CHECK);
818 Klass* k = java_lang_Class::as_Klass(patch());
819 patch_class(cp, index, k, k->name());
820 } else {
821 guarantee_property(java_lang_String::is_instance(patch()),
822 "Illegal class patch at %d in class file %s",
823 index, CHECK);
824 Symbol* const name = java_lang_String::as_symbol(patch());
825 patch_class(cp, index, NULL, name);
826 }
827 break;
828 }
829
830 case JVM_CONSTANT_String: {
831 // skip this patch and don't clear it. Needs the oop array for resolved
832 // references to be created first.
833 return;
834 }
835 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
836 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
837 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
838 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
839 patch_prim:
840 {
841 jvalue value;
842 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
843 guarantee_property(value_type == patch_type,
844 "Illegal primitive patch at %d in class file %s",
845 index, CHECK);
846 switch (value_type) {
847 case T_INT: cp->int_at_put(index, value.i); break;
848 case T_FLOAT: cp->float_at_put(index, value.f); break;
849 case T_LONG: cp->long_at_put(index, value.j); break;
850 case T_DOUBLE: cp->double_at_put(index, value.d); break;
851 default: assert(false, "");
852 }
853 } // end patch_prim label
854 break;
855
856 default: {
857 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
858 guarantee_property(!has_cp_patch_at(index),
859 "Illegal unexpected patch at %d in class file %s",
860 index, CHECK);
861 return;
862 }
863 } // end of switch(tag)
864
865 // On fall-through, mark the patch as used.
866 clear_cp_patch_at(index);
867}
868class NameSigHash: public ResourceObj {
869 public:
870 const Symbol* _name; // name
871 const Symbol* _sig; // signature
872 NameSigHash* _next; // Next entry in hash table
873};
874
875static const int HASH_ROW_SIZE = 256;
876
877static unsigned int hash(const Symbol* name, const Symbol* sig) {
878 unsigned int raw_hash = 0;
879 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
880 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
881
882 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
883}
884
885
886static void initialize_hashtable(NameSigHash** table) {
887 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
888}
889// Return false if the name/sig combination is found in table.
890// Return true if no duplicate is found. And name/sig is added as a new entry in table.
891// The old format checker uses heap sort to find duplicates.
892// NOTE: caller should guarantee that GC doesn't happen during the life cycle
893// of table since we don't expect Symbol*'s to move.
894static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
895 assert(name != NULL, "name in constant pool is NULL");
896
897 // First lookup for duplicates
898 int index = hash(name, sig);
899 NameSigHash* entry = table[index];
900 while (entry != NULL) {
901 if (entry->_name == name && entry->_sig == sig) {
902 return false;
903 }
904 entry = entry->_next;
905 }
906
907 // No duplicate is found, allocate a new entry and fill it.
908 entry = new NameSigHash();
909 entry->_name = name;
910 entry->_sig = sig;
911
912 // Insert into hash table
913 entry->_next = table[index];
914 table[index] = entry;
915
916 return true;
917}
918
919// Side-effects: populates the _local_interfaces field
920void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
921 const int itfs_len,
922 ConstantPool* const cp,
923 bool* const has_nonstatic_concrete_methods,
924 TRAPS) {
925 assert(stream != NULL, "invariant");
926 assert(cp != NULL, "invariant");
927 assert(has_nonstatic_concrete_methods != NULL, "invariant");
928
929 if (itfs_len == 0) {
930 _local_interfaces = Universe::the_empty_instance_klass_array();
931 } else {
932 assert(itfs_len > 0, "only called for len>0");
933 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
934
935 int index;
936 for (index = 0; index < itfs_len; index++) {
937 const u2 interface_index = stream->get_u2(CHECK);
938 Klass* interf;
939 check_property(
940 valid_klass_reference_at(interface_index),
941 "Interface name has bad constant pool index %u in class file %s",
942 interface_index, CHECK);
943 if (cp->tag_at(interface_index).is_klass()) {
944 interf = cp->resolved_klass_at(interface_index);
945 } else {
946 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
947
948 // Don't need to check legal name because it's checked when parsing constant pool.
949 // But need to make sure it's not an array type.
950 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
951 "Bad interface name in class file %s", CHECK);
952
953 // Call resolve_super so classcircularity is checked
954 interf = SystemDictionary::resolve_super_or_fail(
955 _class_name,
956 unresolved_klass,
957 Handle(THREAD, _loader_data->class_loader()),
958 _protection_domain,
959 false,
960 CHECK);
961 }
962
963 if (!interf->is_interface()) {
964 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
965 err_msg("class %s can not implement %s, because it is not an interface (%s)",
966 _class_name->as_klass_external_name(),
967 interf->external_name(),
968 interf->class_in_module_of_loader()));
969 }
970
971 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
972 *has_nonstatic_concrete_methods = true;
973 }
974 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
975 }
976
977 if (!_need_verify || itfs_len <= 1) {
978 return;
979 }
980
981 // Check if there's any duplicates in interfaces
982 ResourceMark rm(THREAD);
983 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
984 NameSigHash*,
985 HASH_ROW_SIZE);
986 initialize_hashtable(interface_names);
987 bool dup = false;
988 const Symbol* name = NULL;
989 {
990 debug_only(NoSafepointVerifier nsv;)
991 for (index = 0; index < itfs_len; index++) {
992 const InstanceKlass* const k = _local_interfaces->at(index);
993 name = k->name();
994 // If no duplicates, add (name, NULL) in hashtable interface_names.
995 if (!put_after_lookup(name, NULL, interface_names)) {
996 dup = true;
997 break;
998 }
999 }
1000 }
1001 if (dup) {
1002 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1003 name->as_C_string(), CHECK);
1004 }
1005 }
1006}
1007
1008void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1009 int constantvalue_index,
1010 int signature_index,
1011 TRAPS) const {
1012 // Make sure the constant pool entry is of a type appropriate to this field
1013 guarantee_property(
1014 (constantvalue_index > 0 &&
1015 constantvalue_index < cp->length()),
1016 "Bad initial value index %u in ConstantValue attribute in class file %s",
1017 constantvalue_index, CHECK);
1018
1019 const constantTag value_type = cp->tag_at(constantvalue_index);
1020 switch(cp->basic_type_for_signature_at(signature_index)) {
1021 case T_LONG: {
1022 guarantee_property(value_type.is_long(),
1023 "Inconsistent constant value type in class file %s",
1024 CHECK);
1025 break;
1026 }
1027 case T_FLOAT: {
1028 guarantee_property(value_type.is_float(),
1029 "Inconsistent constant value type in class file %s",
1030 CHECK);
1031 break;
1032 }
1033 case T_DOUBLE: {
1034 guarantee_property(value_type.is_double(),
1035 "Inconsistent constant value type in class file %s",
1036 CHECK);
1037 break;
1038 }
1039 case T_BYTE:
1040 case T_CHAR:
1041 case T_SHORT:
1042 case T_BOOLEAN:
1043 case T_INT: {
1044 guarantee_property(value_type.is_int(),
1045 "Inconsistent constant value type in class file %s",
1046 CHECK);
1047 break;
1048 }
1049 case T_OBJECT: {
1050 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1051 && value_type.is_string()),
1052 "Bad string initial value in class file %s",
1053 CHECK);
1054 break;
1055 }
1056 default: {
1057 classfile_parse_error("Unable to set initial value %u in class file %s",
1058 constantvalue_index,
1059 CHECK);
1060 }
1061 }
1062}
1063
1064class AnnotationCollector : public ResourceObj{
1065public:
1066 enum Location { _in_field, _in_method, _in_class };
1067 enum ID {
1068 _unknown = 0,
1069 _method_CallerSensitive,
1070 _method_ForceInline,
1071 _method_DontInline,
1072 _method_InjectedProfile,
1073 _method_LambdaForm_Compiled,
1074 _method_Hidden,
1075 _method_HotSpotIntrinsicCandidate,
1076 _jdk_internal_vm_annotation_Contended,
1077 _field_Stable,
1078 _jdk_internal_vm_annotation_ReservedStackAccess,
1079 _annotation_LIMIT
1080 };
1081 const Location _location;
1082 int _annotations_present;
1083 u2 _contended_group;
1084
1085 AnnotationCollector(Location location)
1086 : _location(location), _annotations_present(0)
1087 {
1088 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1089 }
1090 // If this annotation name has an ID, report it (or _none).
1091 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1092 // Set the annotation name:
1093 void set_annotation(ID id) {
1094 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1095 _annotations_present |= nth_bit((int)id);
1096 }
1097
1098 void remove_annotation(ID id) {
1099 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1100 _annotations_present &= ~nth_bit((int)id);
1101 }
1102
1103 // Report if the annotation is present.
1104 bool has_any_annotations() const { return _annotations_present != 0; }
1105 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1106
1107 void set_contended_group(u2 group) { _contended_group = group; }
1108 u2 contended_group() const { return _contended_group; }
1109
1110 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1111
1112 void set_stable(bool stable) { set_annotation(_field_Stable); }
1113 bool is_stable() const { return has_annotation(_field_Stable); }
1114};
1115
1116// This class also doubles as a holder for metadata cleanup.
1117class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1118private:
1119 ClassLoaderData* _loader_data;
1120 AnnotationArray* _field_annotations;
1121 AnnotationArray* _field_type_annotations;
1122public:
1123 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1124 AnnotationCollector(_in_field),
1125 _loader_data(loader_data),
1126 _field_annotations(NULL),
1127 _field_type_annotations(NULL) {}
1128 ~FieldAnnotationCollector();
1129 void apply_to(FieldInfo* f);
1130 AnnotationArray* field_annotations() { return _field_annotations; }
1131 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1132
1133 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1134 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1135};
1136
1137class MethodAnnotationCollector : public AnnotationCollector{
1138public:
1139 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1140 void apply_to(const methodHandle& m);
1141};
1142
1143class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1144public:
1145 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1146 void apply_to(InstanceKlass* ik);
1147};
1148
1149
1150static int skip_annotation_value(const u1*, int, int); // fwd decl
1151
1152// Safely increment index by val if does not pass limit
1153#define SAFE_ADD(index, limit, val) \
1154if (index >= limit - val) return limit; \
1155index += val;
1156
1157// Skip an annotation. Return >=limit if there is any problem.
1158static int skip_annotation(const u1* buffer, int limit, int index) {
1159 assert(buffer != NULL, "invariant");
1160 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1161 // value := switch (tag:u1) { ... }
1162 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1163 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1164 while (--nmem >= 0 && index < limit) {
1165 SAFE_ADD(index, limit, 2); // skip member
1166 index = skip_annotation_value(buffer, limit, index);
1167 }
1168 return index;
1169}
1170
1171// Skip an annotation value. Return >=limit if there is any problem.
1172static int skip_annotation_value(const u1* buffer, int limit, int index) {
1173 assert(buffer != NULL, "invariant");
1174
1175 // value := switch (tag:u1) {
1176 // case B, C, I, S, Z, D, F, J, c: con:u2;
1177 // case e: e_class:u2 e_name:u2;
1178 // case s: s_con:u2;
1179 // case [: do(nval:u2) {value};
1180 // case @: annotation;
1181 // case s: s_con:u2;
1182 // }
1183 SAFE_ADD(index, limit, 1); // read tag
1184 const u1 tag = buffer[index - 1];
1185 switch (tag) {
1186 case 'B':
1187 case 'C':
1188 case 'I':
1189 case 'S':
1190 case 'Z':
1191 case 'D':
1192 case 'F':
1193 case 'J':
1194 case 'c':
1195 case 's':
1196 SAFE_ADD(index, limit, 2); // skip con or s_con
1197 break;
1198 case 'e':
1199 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1200 break;
1201 case '[':
1202 {
1203 SAFE_ADD(index, limit, 2); // read nval
1204 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1205 while (--nval >= 0 && index < limit) {
1206 index = skip_annotation_value(buffer, limit, index);
1207 }
1208 }
1209 break;
1210 case '@':
1211 index = skip_annotation(buffer, limit, index);
1212 break;
1213 default:
1214 return limit; // bad tag byte
1215 }
1216 return index;
1217}
1218
1219// Sift through annotations, looking for those significant to the VM:
1220static void parse_annotations(const ConstantPool* const cp,
1221 const u1* buffer, int limit,
1222 AnnotationCollector* coll,
1223 ClassLoaderData* loader_data,
1224 TRAPS) {
1225
1226 assert(cp != NULL, "invariant");
1227 assert(buffer != NULL, "invariant");
1228 assert(coll != NULL, "invariant");
1229 assert(loader_data != NULL, "invariant");
1230
1231 // annotations := do(nann:u2) {annotation}
1232 int index = 2; // read nann
1233 if (index >= limit) return;
1234 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1235 enum { // initial annotation layout
1236 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1237 count_off = 2, // u2 such as 1 (one value)
1238 member_off = 4, // utf8 such as 'value'
1239 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1240 e_tag_val = 'e',
1241 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1242 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1243 e_size = 11, // end of 'e' annotation
1244 c_tag_val = 'c', // payload is type
1245 c_con_off = 7, // utf8 payload, such as 'I'
1246 c_size = 9, // end of 'c' annotation
1247 s_tag_val = 's', // payload is String
1248 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1249 s_size = 9,
1250 min_size = 6 // smallest possible size (zero members)
1251 };
1252 // Cannot add min_size to index in case of overflow MAX_INT
1253 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1254 int index0 = index;
1255 index = skip_annotation(buffer, limit, index);
1256 const u1* const abase = buffer + index0;
1257 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1258 const int count = Bytes::get_Java_u2((address)abase + count_off);
1259 const Symbol* const aname = check_symbol_at(cp, atype);
1260 if (aname == NULL) break; // invalid annotation name
1261 const Symbol* member = NULL;
1262 if (count >= 1) {
1263 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1264 member = check_symbol_at(cp, member_index);
1265 if (member == NULL) break; // invalid member name
1266 }
1267
1268 // Here is where parsing particular annotations will take place.
1269 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1270 if (AnnotationCollector::_unknown == id) continue;
1271 coll->set_annotation(id);
1272
1273 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1274 // @Contended can optionally specify the contention group.
1275 //
1276 // Contended group defines the equivalence class over the fields:
1277 // the fields within the same contended group are not treated distinct.
1278 // The only exception is default group, which does not incur the
1279 // equivalence. Naturally, contention group for classes is meaningless.
1280 //
1281 // While the contention group is specified as String, annotation
1282 // values are already interned, and we might as well use the constant
1283 // pool index as the group tag.
1284 //
1285 u2 group_index = 0; // default contended group
1286 if (count == 1
1287 && s_size == (index - index0) // match size
1288 && s_tag_val == *(abase + tag_off)
1289 && member == vmSymbols::value_name()) {
1290 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1291 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1292 group_index = 0; // default contended group
1293 }
1294 }
1295 coll->set_contended_group(group_index);
1296 }
1297 }
1298}
1299
1300
1301// Parse attributes for a field.
1302void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1303 u2 attributes_count,
1304 bool is_static, u2 signature_index,
1305 u2* const constantvalue_index_addr,
1306 bool* const is_synthetic_addr,
1307 u2* const generic_signature_index_addr,
1308 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1309 TRAPS) {
1310 assert(cfs != NULL, "invariant");
1311 assert(constantvalue_index_addr != NULL, "invariant");
1312 assert(is_synthetic_addr != NULL, "invariant");
1313 assert(generic_signature_index_addr != NULL, "invariant");
1314 assert(parsed_annotations != NULL, "invariant");
1315 assert(attributes_count > 0, "attributes_count should be greater than 0");
1316
1317 u2 constantvalue_index = 0;
1318 u2 generic_signature_index = 0;
1319 bool is_synthetic = false;
1320 const u1* runtime_visible_annotations = NULL;
1321 int runtime_visible_annotations_length = 0;
1322 const u1* runtime_invisible_annotations = NULL;
1323 int runtime_invisible_annotations_length = 0;
1324 const u1* runtime_visible_type_annotations = NULL;
1325 int runtime_visible_type_annotations_length = 0;
1326 const u1* runtime_invisible_type_annotations = NULL;
1327 int runtime_invisible_type_annotations_length = 0;
1328 bool runtime_invisible_annotations_exists = false;
1329 bool runtime_invisible_type_annotations_exists = false;
1330 const ConstantPool* const cp = _cp;
1331
1332 while (attributes_count--) {
1333 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1334 const u2 attribute_name_index = cfs->get_u2_fast();
1335 const u4 attribute_length = cfs->get_u4_fast();
1336 check_property(valid_symbol_at(attribute_name_index),
1337 "Invalid field attribute index %u in class file %s",
1338 attribute_name_index,
1339 CHECK);
1340
1341 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1342 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1343 // ignore if non-static
1344 if (constantvalue_index != 0) {
1345 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1346 }
1347 check_property(
1348 attribute_length == 2,
1349 "Invalid ConstantValue field attribute length %u in class file %s",
1350 attribute_length, CHECK);
1351
1352 constantvalue_index = cfs->get_u2(CHECK);
1353 if (_need_verify) {
1354 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1355 }
1356 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1357 if (attribute_length != 0) {
1358 classfile_parse_error(
1359 "Invalid Synthetic field attribute length %u in class file %s",
1360 attribute_length, CHECK);
1361 }
1362 is_synthetic = true;
1363 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1364 if (attribute_length != 0) {
1365 classfile_parse_error(
1366 "Invalid Deprecated field attribute length %u in class file %s",
1367 attribute_length, CHECK);
1368 }
1369 } else if (_major_version >= JAVA_1_5_VERSION) {
1370 if (attribute_name == vmSymbols::tag_signature()) {
1371 if (generic_signature_index != 0) {
1372 classfile_parse_error(
1373 "Multiple Signature attributes for field in class file %s", CHECK);
1374 }
1375 if (attribute_length != 2) {
1376 classfile_parse_error(
1377 "Wrong size %u for field's Signature attribute in class file %s",
1378 attribute_length, CHECK);
1379 }
1380 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1381 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1382 if (runtime_visible_annotations != NULL) {
1383 classfile_parse_error(
1384 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1385 }
1386 runtime_visible_annotations_length = attribute_length;
1387 runtime_visible_annotations = cfs->current();
1388 assert(runtime_visible_annotations != NULL, "null visible annotations");
1389 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1390 parse_annotations(cp,
1391 runtime_visible_annotations,
1392 runtime_visible_annotations_length,
1393 parsed_annotations,
1394 _loader_data,
1395 CHECK);
1396 cfs->skip_u1_fast(runtime_visible_annotations_length);
1397 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1398 if (runtime_invisible_annotations_exists) {
1399 classfile_parse_error(
1400 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1401 }
1402 runtime_invisible_annotations_exists = true;
1403 if (PreserveAllAnnotations) {
1404 runtime_invisible_annotations_length = attribute_length;
1405 runtime_invisible_annotations = cfs->current();
1406 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1407 }
1408 cfs->skip_u1(attribute_length, CHECK);
1409 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1410 if (runtime_visible_type_annotations != NULL) {
1411 classfile_parse_error(
1412 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1413 }
1414 runtime_visible_type_annotations_length = attribute_length;
1415 runtime_visible_type_annotations = cfs->current();
1416 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1417 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1418 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1419 if (runtime_invisible_type_annotations_exists) {
1420 classfile_parse_error(
1421 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1422 } else {
1423 runtime_invisible_type_annotations_exists = true;
1424 }
1425 if (PreserveAllAnnotations) {
1426 runtime_invisible_type_annotations_length = attribute_length;
1427 runtime_invisible_type_annotations = cfs->current();
1428 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1429 }
1430 cfs->skip_u1(attribute_length, CHECK);
1431 } else {
1432 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1433 }
1434 } else {
1435 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1436 }
1437 }
1438
1439 *constantvalue_index_addr = constantvalue_index;
1440 *is_synthetic_addr = is_synthetic;
1441 *generic_signature_index_addr = generic_signature_index;
1442 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1443 runtime_visible_annotations_length,
1444 runtime_invisible_annotations,
1445 runtime_invisible_annotations_length,
1446 CHECK);
1447 parsed_annotations->set_field_annotations(a);
1448 a = assemble_annotations(runtime_visible_type_annotations,
1449 runtime_visible_type_annotations_length,
1450 runtime_invisible_type_annotations,
1451 runtime_invisible_type_annotations_length,
1452 CHECK);
1453 parsed_annotations->set_field_type_annotations(a);
1454 return;
1455}
1456
1457
1458// Field allocation types. Used for computing field offsets.
1459
1460enum FieldAllocationType {
1461 STATIC_OOP, // Oops
1462 STATIC_BYTE, // Boolean, Byte, char
1463 STATIC_SHORT, // shorts
1464 STATIC_WORD, // ints
1465 STATIC_DOUBLE, // aligned long or double
1466 NONSTATIC_OOP,
1467 NONSTATIC_BYTE,
1468 NONSTATIC_SHORT,
1469 NONSTATIC_WORD,
1470 NONSTATIC_DOUBLE,
1471 MAX_FIELD_ALLOCATION_TYPE,
1472 BAD_ALLOCATION_TYPE = -1
1473};
1474
1475static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1476 BAD_ALLOCATION_TYPE, // 0
1477 BAD_ALLOCATION_TYPE, // 1
1478 BAD_ALLOCATION_TYPE, // 2
1479 BAD_ALLOCATION_TYPE, // 3
1480 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1481 NONSTATIC_SHORT, // T_CHAR = 5,
1482 NONSTATIC_WORD, // T_FLOAT = 6,
1483 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1484 NONSTATIC_BYTE, // T_BYTE = 8,
1485 NONSTATIC_SHORT, // T_SHORT = 9,
1486 NONSTATIC_WORD, // T_INT = 10,
1487 NONSTATIC_DOUBLE, // T_LONG = 11,
1488 NONSTATIC_OOP, // T_OBJECT = 12,
1489 NONSTATIC_OOP, // T_ARRAY = 13,
1490 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1491 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1492 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1493 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1494 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1495 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1496 BAD_ALLOCATION_TYPE, // 0
1497 BAD_ALLOCATION_TYPE, // 1
1498 BAD_ALLOCATION_TYPE, // 2
1499 BAD_ALLOCATION_TYPE, // 3
1500 STATIC_BYTE , // T_BOOLEAN = 4,
1501 STATIC_SHORT, // T_CHAR = 5,
1502 STATIC_WORD, // T_FLOAT = 6,
1503 STATIC_DOUBLE, // T_DOUBLE = 7,
1504 STATIC_BYTE, // T_BYTE = 8,
1505 STATIC_SHORT, // T_SHORT = 9,
1506 STATIC_WORD, // T_INT = 10,
1507 STATIC_DOUBLE, // T_LONG = 11,
1508 STATIC_OOP, // T_OBJECT = 12,
1509 STATIC_OOP, // T_ARRAY = 13,
1510 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1511 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1512 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1513 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1514 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1515 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1516};
1517
1518static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1519 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1520 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1521 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1522 return result;
1523}
1524
1525class ClassFileParser::FieldAllocationCount : public ResourceObj {
1526 public:
1527 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1528
1529 FieldAllocationCount() {
1530 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1531 count[i] = 0;
1532 }
1533 }
1534
1535 FieldAllocationType update(bool is_static, BasicType type) {
1536 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1537 if (atype != BAD_ALLOCATION_TYPE) {
1538 // Make sure there is no overflow with injected fields.
1539 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1540 count[atype]++;
1541 }
1542 return atype;
1543 }
1544};
1545
1546// Side-effects: populates the _fields, _fields_annotations,
1547// _fields_type_annotations fields
1548void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1549 bool is_interface,
1550 FieldAllocationCount* const fac,
1551 ConstantPool* cp,
1552 const int cp_size,
1553 u2* const java_fields_count_ptr,
1554 TRAPS) {
1555
1556 assert(cfs != NULL, "invariant");
1557 assert(fac != NULL, "invariant");
1558 assert(cp != NULL, "invariant");
1559 assert(java_fields_count_ptr != NULL, "invariant");
1560
1561 assert(NULL == _fields, "invariant");
1562 assert(NULL == _fields_annotations, "invariant");
1563 assert(NULL == _fields_type_annotations, "invariant");
1564
1565 cfs->guarantee_more(2, CHECK); // length
1566 const u2 length = cfs->get_u2_fast();
1567 *java_fields_count_ptr = length;
1568
1569 int num_injected = 0;
1570 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1571 &num_injected);
1572 const int total_fields = length + num_injected;
1573
1574 // The field array starts with tuples of shorts
1575 // [access, name index, sig index, initial value index, byte offset].
1576 // A generic signature slot only exists for field with generic
1577 // signature attribute. And the access flag is set with
1578 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1579 // signature slots are at the end of the field array and after all
1580 // other fields data.
1581 //
1582 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1583 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1584 // ...
1585 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1586 // [generic signature index]
1587 // [generic signature index]
1588 // ...
1589 //
1590 // Allocate a temporary resource array for field data. For each field,
1591 // a slot is reserved in the temporary array for the generic signature
1592 // index. After parsing all fields, the data are copied to a permanent
1593 // array and any unused slots will be discarded.
1594 ResourceMark rm(THREAD);
1595 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1596 u2,
1597 total_fields * (FieldInfo::field_slots + 1));
1598
1599 // The generic signature slots start after all other fields' data.
1600 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1601 int num_generic_signature = 0;
1602 for (int n = 0; n < length; n++) {
1603 // access_flags, name_index, descriptor_index, attributes_count
1604 cfs->guarantee_more(8, CHECK);
1605
1606 AccessFlags access_flags;
1607 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1608 verify_legal_field_modifiers(flags, is_interface, CHECK);
1609 access_flags.set_flags(flags);
1610
1611 const u2 name_index = cfs->get_u2_fast();
1612 check_property(valid_symbol_at(name_index),
1613 "Invalid constant pool index %u for field name in class file %s",
1614 name_index, CHECK);
1615 const Symbol* const name = cp->symbol_at(name_index);
1616 verify_legal_field_name(name, CHECK);
1617
1618 const u2 signature_index = cfs->get_u2_fast();
1619 check_property(valid_symbol_at(signature_index),
1620 "Invalid constant pool index %u for field signature in class file %s",
1621 signature_index, CHECK);
1622 const Symbol* const sig = cp->symbol_at(signature_index);
1623 verify_legal_field_signature(name, sig, CHECK);
1624
1625 u2 constantvalue_index = 0;
1626 bool is_synthetic = false;
1627 u2 generic_signature_index = 0;
1628 const bool is_static = access_flags.is_static();
1629 FieldAnnotationCollector parsed_annotations(_loader_data);
1630
1631 const u2 attributes_count = cfs->get_u2_fast();
1632 if (attributes_count > 0) {
1633 parse_field_attributes(cfs,
1634 attributes_count,
1635 is_static,
1636 signature_index,
1637 &constantvalue_index,
1638 &is_synthetic,
1639 &generic_signature_index,
1640 &parsed_annotations,
1641 CHECK);
1642
1643 if (parsed_annotations.field_annotations() != NULL) {
1644 if (_fields_annotations == NULL) {
1645 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1646 _loader_data, length, NULL,
1647 CHECK);
1648 }
1649 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1650 parsed_annotations.set_field_annotations(NULL);
1651 }
1652 if (parsed_annotations.field_type_annotations() != NULL) {
1653 if (_fields_type_annotations == NULL) {
1654 _fields_type_annotations =
1655 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1656 length,
1657 NULL,
1658 CHECK);
1659 }
1660 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1661 parsed_annotations.set_field_type_annotations(NULL);
1662 }
1663
1664 if (is_synthetic) {
1665 access_flags.set_is_synthetic();
1666 }
1667 if (generic_signature_index != 0) {
1668 access_flags.set_field_has_generic_signature();
1669 fa[generic_signature_slot] = generic_signature_index;
1670 generic_signature_slot ++;
1671 num_generic_signature ++;
1672 }
1673 }
1674
1675 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1676 field->initialize(access_flags.as_short(),
1677 name_index,
1678 signature_index,
1679 constantvalue_index);
1680 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1681
1682 // Remember how many oops we encountered and compute allocation type
1683 const FieldAllocationType atype = fac->update(is_static, type);
1684 field->set_allocation_type(atype);
1685
1686 // After field is initialized with type, we can augment it with aux info
1687 if (parsed_annotations.has_any_annotations())
1688 parsed_annotations.apply_to(field);
1689 }
1690
1691 int index = length;
1692 if (num_injected != 0) {
1693 for (int n = 0; n < num_injected; n++) {
1694 // Check for duplicates
1695 if (injected[n].may_be_java) {
1696 const Symbol* const name = injected[n].name();
1697 const Symbol* const signature = injected[n].signature();
1698 bool duplicate = false;
1699 for (int i = 0; i < length; i++) {
1700 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1701 if (name == cp->symbol_at(f->name_index()) &&
1702 signature == cp->symbol_at(f->signature_index())) {
1703 // Symbol is desclared in Java so skip this one
1704 duplicate = true;
1705 break;
1706 }
1707 }
1708 if (duplicate) {
1709 // These will be removed from the field array at the end
1710 continue;
1711 }
1712 }
1713
1714 // Injected field
1715 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1716 field->initialize(JVM_ACC_FIELD_INTERNAL,
1717 injected[n].name_index,
1718 injected[n].signature_index,
1719 0);
1720
1721 const BasicType type = FieldType::basic_type(injected[n].signature());
1722
1723 // Remember how many oops we encountered and compute allocation type
1724 const FieldAllocationType atype = fac->update(false, type);
1725 field->set_allocation_type(atype);
1726 index++;
1727 }
1728 }
1729
1730 assert(NULL == _fields, "invariant");
1731
1732 _fields =
1733 MetadataFactory::new_array<u2>(_loader_data,
1734 index * FieldInfo::field_slots + num_generic_signature,
1735 CHECK);
1736 // Sometimes injected fields already exist in the Java source so
1737 // the fields array could be too long. In that case the
1738 // fields array is trimed. Also unused slots that were reserved
1739 // for generic signature indexes are discarded.
1740 {
1741 int i = 0;
1742 for (; i < index * FieldInfo::field_slots; i++) {
1743 _fields->at_put(i, fa[i]);
1744 }
1745 for (int j = total_fields * FieldInfo::field_slots;
1746 j < generic_signature_slot; j++) {
1747 _fields->at_put(i++, fa[j]);
1748 }
1749 assert(_fields->length() == i, "");
1750 }
1751
1752 if (_need_verify && length > 1) {
1753 // Check duplicated fields
1754 ResourceMark rm(THREAD);
1755 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1756 THREAD, NameSigHash*, HASH_ROW_SIZE);
1757 initialize_hashtable(names_and_sigs);
1758 bool dup = false;
1759 const Symbol* name = NULL;
1760 const Symbol* sig = NULL;
1761 {
1762 debug_only(NoSafepointVerifier nsv;)
1763 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1764 name = fs.name();
1765 sig = fs.signature();
1766 // If no duplicates, add name/signature in hashtable names_and_sigs.
1767 if (!put_after_lookup(name, sig, names_and_sigs)) {
1768 dup = true;
1769 break;
1770 }
1771 }
1772 }
1773 if (dup) {
1774 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1775 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1776 }
1777 }
1778}
1779
1780
1781const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1782 u4 code_length,
1783 u4 exception_table_length,
1784 TRAPS) {
1785 assert(cfs != NULL, "invariant");
1786
1787 const unsafe_u2* const exception_table_start = cfs->current();
1788 assert(exception_table_start != NULL, "null exception table");
1789
1790 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1791 // end_pc,
1792 // handler_pc,
1793 // catch_type_index
1794
1795 // Will check legal target after parsing code array in verifier.
1796 if (_need_verify) {
1797 for (unsigned int i = 0; i < exception_table_length; i++) {
1798 const u2 start_pc = cfs->get_u2_fast();
1799 const u2 end_pc = cfs->get_u2_fast();
1800 const u2 handler_pc = cfs->get_u2_fast();
1801 const u2 catch_type_index = cfs->get_u2_fast();
1802 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1803 "Illegal exception table range in class file %s",
1804 CHECK_NULL);
1805 guarantee_property(handler_pc < code_length,
1806 "Illegal exception table handler in class file %s",
1807 CHECK_NULL);
1808 if (catch_type_index != 0) {
1809 guarantee_property(valid_klass_reference_at(catch_type_index),
1810 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1811 }
1812 }
1813 } else {
1814 cfs->skip_u2_fast(exception_table_length * 4);
1815 }
1816 return exception_table_start;
1817}
1818
1819void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1820 u4 code_length,
1821 CompressedLineNumberWriteStream**const write_stream,
1822 TRAPS) {
1823
1824 const ClassFileStream* const cfs = _stream;
1825 unsigned int num_entries = cfs->get_u2(CHECK);
1826
1827 // Each entry is a u2 start_pc, and a u2 line_number
1828 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1829
1830 // Verify line number attribute and table length
1831 check_property(
1832 code_attribute_length == sizeof(u2) + length_in_bytes,
1833 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1834
1835 cfs->guarantee_more(length_in_bytes, CHECK);
1836
1837 if ((*write_stream) == NULL) {
1838 if (length_in_bytes > fixed_buffer_size) {
1839 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1840 } else {
1841 (*write_stream) = new CompressedLineNumberWriteStream(
1842 _linenumbertable_buffer, fixed_buffer_size);
1843 }
1844 }
1845
1846 while (num_entries-- > 0) {
1847 const u2 bci = cfs->get_u2_fast(); // start_pc
1848 const u2 line = cfs->get_u2_fast(); // line_number
1849 guarantee_property(bci < code_length,
1850 "Invalid pc in LineNumberTable in class file %s", CHECK);
1851 (*write_stream)->write_pair(bci, line);
1852 }
1853}
1854
1855
1856class LVT_Hash : public AllStatic {
1857 public:
1858
1859 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1860 /*
1861 * 3-tuple start_bci/length/slot has to be unique key,
1862 * so the following comparison seems to be redundant:
1863 * && elem->name_cp_index == entry->_elem->name_cp_index
1864 */
1865 return (e0.start_bci == e1.start_bci &&
1866 e0.length == e1.length &&
1867 e0.name_cp_index == e1.name_cp_index &&
1868 e0.slot == e1.slot);
1869 }
1870
1871 static unsigned int hash(LocalVariableTableElement const& e0) {
1872 unsigned int raw_hash = e0.start_bci;
1873
1874 raw_hash = e0.length + raw_hash * 37;
1875 raw_hash = e0.name_cp_index + raw_hash * 37;
1876 raw_hash = e0.slot + raw_hash * 37;
1877
1878 return raw_hash;
1879 }
1880};
1881
1882
1883// Class file LocalVariableTable elements.
1884class Classfile_LVT_Element {
1885 public:
1886 u2 start_bci;
1887 u2 length;
1888 u2 name_cp_index;
1889 u2 descriptor_cp_index;
1890 u2 slot;
1891};
1892
1893static void copy_lvt_element(const Classfile_LVT_Element* const src,
1894 LocalVariableTableElement* const lvt) {
1895 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1896 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1897 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1898 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1899 lvt->signature_cp_index = 0;
1900 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1901}
1902
1903// Function is used to parse both attributes:
1904// LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1905const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1906 u4 code_length,
1907 u2 max_locals,
1908 u4 code_attribute_length,
1909 u2* const localvariable_table_length,
1910 bool isLVTT,
1911 TRAPS) {
1912 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1913 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1914 const unsigned int size =
1915 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1916
1917 const ConstantPool* const cp = _cp;
1918
1919 // Verify local variable table attribute has right length
1920 if (_need_verify) {
1921 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1922 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1923 }
1924
1925 const unsafe_u2* const localvariable_table_start = cfs->current();
1926 assert(localvariable_table_start != NULL, "null local variable table");
1927 if (!_need_verify) {
1928 cfs->skip_u2_fast(size);
1929 } else {
1930 cfs->guarantee_more(size * 2, CHECK_NULL);
1931 for(int i = 0; i < (*localvariable_table_length); i++) {
1932 const u2 start_pc = cfs->get_u2_fast();
1933 const u2 length = cfs->get_u2_fast();
1934 const u2 name_index = cfs->get_u2_fast();
1935 const u2 descriptor_index = cfs->get_u2_fast();
1936 const u2 index = cfs->get_u2_fast();
1937 // Assign to a u4 to avoid overflow
1938 const u4 end_pc = (u4)start_pc + (u4)length;
1939
1940 if (start_pc >= code_length) {
1941 classfile_parse_error(
1942 "Invalid start_pc %u in %s in class file %s",
1943 start_pc, tbl_name, CHECK_NULL);
1944 }
1945 if (end_pc > code_length) {
1946 classfile_parse_error(
1947 "Invalid length %u in %s in class file %s",
1948 length, tbl_name, CHECK_NULL);
1949 }
1950 const int cp_size = cp->length();
1951 guarantee_property(valid_symbol_at(name_index),
1952 "Name index %u in %s has bad constant type in class file %s",
1953 name_index, tbl_name, CHECK_NULL);
1954 guarantee_property(valid_symbol_at(descriptor_index),
1955 "Signature index %u in %s has bad constant type in class file %s",
1956 descriptor_index, tbl_name, CHECK_NULL);
1957
1958 const Symbol* const name = cp->symbol_at(name_index);
1959 const Symbol* const sig = cp->symbol_at(descriptor_index);
1960 verify_legal_field_name(name, CHECK_NULL);
1961 u2 extra_slot = 0;
1962 if (!isLVTT) {
1963 verify_legal_field_signature(name, sig, CHECK_NULL);
1964
1965 // 4894874: check special cases for double and long local variables
1966 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1967 sig == vmSymbols::type_signature(T_LONG)) {
1968 extra_slot = 1;
1969 }
1970 }
1971 guarantee_property((index + extra_slot) < max_locals,
1972 "Invalid index %u in %s in class file %s",
1973 index, tbl_name, CHECK_NULL);
1974 }
1975 }
1976 return localvariable_table_start;
1977}
1978
1979static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1980 u4 code_attribute_length,
1981 bool need_verify,
1982 TRAPS) {
1983 assert(cfs != NULL, "invariant");
1984
1985 if (0 == code_attribute_length) {
1986 return NULL;
1987 }
1988
1989 const u1* const stackmap_table_start = cfs->current();
1990 assert(stackmap_table_start != NULL, "null stackmap table");
1991
1992 // check code_attribute_length first
1993 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1994
1995 if (!need_verify && !DumpSharedSpaces) {
1996 return NULL;
1997 }
1998 return stackmap_table_start;
1999}
2000
2001const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2002 u2* const checked_exceptions_length,
2003 u4 method_attribute_length,
2004 TRAPS) {
2005 assert(cfs != NULL, "invariant");
2006 assert(checked_exceptions_length != NULL, "invariant");
2007
2008 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2009 *checked_exceptions_length = cfs->get_u2_fast();
2010 const unsigned int size =
2011 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2012 const unsafe_u2* const checked_exceptions_start = cfs->current();
2013 assert(checked_exceptions_start != NULL, "null checked exceptions");
2014 if (!_need_verify) {
2015 cfs->skip_u2_fast(size);
2016 } else {
2017 // Verify each value in the checked exception table
2018 u2 checked_exception;
2019 const u2 len = *checked_exceptions_length;
2020 cfs->guarantee_more(2 * len, CHECK_NULL);
2021 for (int i = 0; i < len; i++) {
2022 checked_exception = cfs->get_u2_fast();
2023 check_property(
2024 valid_klass_reference_at(checked_exception),
2025 "Exception name has bad type at constant pool %u in class file %s",
2026 checked_exception, CHECK_NULL);
2027 }
2028 }
2029 // check exceptions attribute length
2030 if (_need_verify) {
2031 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2032 sizeof(u2) * size),
2033 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2034 }
2035 return checked_exceptions_start;
2036}
2037
2038void ClassFileParser::throwIllegalSignature(const char* type,
2039 const Symbol* name,
2040 const Symbol* sig,
2041 TRAPS) const {
2042 assert(name != NULL, "invariant");
2043 assert(sig != NULL, "invariant");
2044
2045 ResourceMark rm(THREAD);
2046 Exceptions::fthrow(THREAD_AND_LOCATION,
2047 vmSymbols::java_lang_ClassFormatError(),
2048 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2049 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2050}
2051
2052AnnotationCollector::ID
2053AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2054 const Symbol* name) {
2055 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2056 // Privileged code can use all annotations. Other code silently drops some.
2057 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2058 loader_data->is_platform_class_loader_data() ||
2059 loader_data->is_unsafe_anonymous();
2060 switch (sid) {
2061 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2062 if (_location != _in_method) break; // only allow for methods
2063 if (!privileged) break; // only allow in privileged code
2064 return _method_CallerSensitive;
2065 }
2066 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2067 if (_location != _in_method) break; // only allow for methods
2068 if (!privileged) break; // only allow in privileged code
2069 return _method_ForceInline;
2070 }
2071 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2072 if (_location != _in_method) break; // only allow for methods
2073 if (!privileged) break; // only allow in privileged code
2074 return _method_DontInline;
2075 }
2076 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2077 if (_location != _in_method) break; // only allow for methods
2078 if (!privileged) break; // only allow in privileged code
2079 return _method_InjectedProfile;
2080 }
2081 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2082 if (_location != _in_method) break; // only allow for methods
2083 if (!privileged) break; // only allow in privileged code
2084 return _method_LambdaForm_Compiled;
2085 }
2086 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2087 if (_location != _in_method) break; // only allow for methods
2088 if (!privileged) break; // only allow in privileged code
2089 return _method_Hidden;
2090 }
2091 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2092 if (_location != _in_method) break; // only allow for methods
2093 if (!privileged) break; // only allow in privileged code
2094 return _method_HotSpotIntrinsicCandidate;
2095 }
2096 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2097 if (_location != _in_field) break; // only allow for fields
2098 if (!privileged) break; // only allow in privileged code
2099 return _field_Stable;
2100 }
2101 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2102 if (_location != _in_field && _location != _in_class) {
2103 break; // only allow for fields and classes
2104 }
2105 if (!EnableContended || (RestrictContended && !privileged)) {
2106 break; // honor privileges
2107 }
2108 return _jdk_internal_vm_annotation_Contended;
2109 }
2110 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2111 if (_location != _in_method) break; // only allow for methods
2112 if (RestrictReservedStack && !privileged) break; // honor privileges
2113 return _jdk_internal_vm_annotation_ReservedStackAccess;
2114 }
2115 default: {
2116 break;
2117 }
2118 }
2119 return AnnotationCollector::_unknown;
2120}
2121
2122void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2123 if (is_contended())
2124 f->set_contended_group(contended_group());
2125 if (is_stable())
2126 f->set_stable(true);
2127}
2128
2129ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2130 // If there's an error deallocate metadata for field annotations
2131 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2132 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2133}
2134
2135void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2136 if (has_annotation(_method_CallerSensitive))
2137 m->set_caller_sensitive(true);
2138 if (has_annotation(_method_ForceInline))
2139 m->set_force_inline(true);
2140 if (has_annotation(_method_DontInline))
2141 m->set_dont_inline(true);
2142 if (has_annotation(_method_InjectedProfile))
2143 m->set_has_injected_profile(true);
2144 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2145 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2146 if (has_annotation(_method_Hidden))
2147 m->set_hidden(true);
2148 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2149 m->set_intrinsic_candidate(true);
2150 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2151 m->set_has_reserved_stack_access(true);
2152}
2153
2154void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2155 assert(ik != NULL, "invariant");
2156 ik->set_is_contended(is_contended());
2157}
2158
2159#define MAX_ARGS_SIZE 255
2160#define MAX_CODE_SIZE 65535
2161#define INITIAL_MAX_LVT_NUMBER 256
2162
2163/* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2164 *
2165 * Rules for LVT's and LVTT's are:
2166 * - There can be any number of LVT's and LVTT's.
2167 * - If there are n LVT's, it is the same as if there was just
2168 * one LVT containing all the entries from the n LVT's.
2169 * - There may be no more than one LVT entry per local variable.
2170 * Two LVT entries are 'equal' if these fields are the same:
2171 * start_pc, length, name, slot
2172 * - There may be no more than one LVTT entry per each LVT entry.
2173 * Each LVTT entry has to match some LVT entry.
2174 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2175 */
2176void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2177 int lvt_cnt,
2178 u2* const localvariable_table_length,
2179 const unsafe_u2** const localvariable_table_start,
2180 int lvtt_cnt,
2181 u2* const localvariable_type_table_length,
2182 const unsafe_u2** const localvariable_type_table_start,
2183 TRAPS) {
2184
2185 ResourceMark rm(THREAD);
2186
2187 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2188 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2189
2190 LVT_HashTable* const table = new LVT_HashTable();
2191
2192 // To fill LocalVariableTable in
2193 const Classfile_LVT_Element* cf_lvt;
2194 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2195
2196 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2197 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2198 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2199 copy_lvt_element(&cf_lvt[idx], lvt);
2200 // If no duplicates, add LVT elem in hashtable.
2201 if (table->put(*lvt, lvt) == false
2202 && _need_verify
2203 && _major_version >= JAVA_1_5_VERSION) {
2204 classfile_parse_error("Duplicated LocalVariableTable attribute "
2205 "entry for '%s' in class file %s",
2206 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2207 CHECK);
2208 }
2209 }
2210 }
2211
2212 // To merge LocalVariableTable and LocalVariableTypeTable
2213 const Classfile_LVT_Element* cf_lvtt;
2214 LocalVariableTableElement lvtt_elem;
2215
2216 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2217 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2218 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2219 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2220 LocalVariableTableElement** entry = table->get(lvtt_elem);
2221 if (entry == NULL) {
2222 if (_need_verify) {
2223 classfile_parse_error("LVTT entry for '%s' in class file %s "
2224 "does not match any LVT entry",
2225 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2226 CHECK);
2227 }
2228 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2229 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2230 "entry for '%s' in class file %s",
2231 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2232 CHECK);
2233 } else {
2234 // to add generic signatures into LocalVariableTable
2235 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2236 }
2237 }
2238 }
2239}
2240
2241
2242void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2243 const u1* runtime_visible_annotations,
2244 int runtime_visible_annotations_length,
2245 const u1* runtime_invisible_annotations,
2246 int runtime_invisible_annotations_length,
2247 const u1* runtime_visible_parameter_annotations,
2248 int runtime_visible_parameter_annotations_length,
2249 const u1* runtime_invisible_parameter_annotations,
2250 int runtime_invisible_parameter_annotations_length,
2251 const u1* runtime_visible_type_annotations,
2252 int runtime_visible_type_annotations_length,
2253 const u1* runtime_invisible_type_annotations,
2254 int runtime_invisible_type_annotations_length,
2255 const u1* annotation_default,
2256 int annotation_default_length,
2257 TRAPS) {
2258
2259 AnnotationArray* a;
2260
2261 if (runtime_visible_annotations_length +
2262 runtime_invisible_annotations_length > 0) {
2263 a = assemble_annotations(runtime_visible_annotations,
2264 runtime_visible_annotations_length,
2265 runtime_invisible_annotations,
2266 runtime_invisible_annotations_length,
2267 CHECK);
2268 cm->set_method_annotations(a);
2269 }
2270
2271 if (runtime_visible_parameter_annotations_length +
2272 runtime_invisible_parameter_annotations_length > 0) {
2273 a = assemble_annotations(runtime_visible_parameter_annotations,
2274 runtime_visible_parameter_annotations_length,
2275 runtime_invisible_parameter_annotations,
2276 runtime_invisible_parameter_annotations_length,
2277 CHECK);
2278 cm->set_parameter_annotations(a);
2279 }
2280
2281 if (annotation_default_length > 0) {
2282 a = assemble_annotations(annotation_default,
2283 annotation_default_length,
2284 NULL,
2285 0,
2286 CHECK);
2287 cm->set_default_annotations(a);
2288 }
2289
2290 if (runtime_visible_type_annotations_length +
2291 runtime_invisible_type_annotations_length > 0) {
2292 a = assemble_annotations(runtime_visible_type_annotations,
2293 runtime_visible_type_annotations_length,
2294 runtime_invisible_type_annotations,
2295 runtime_invisible_type_annotations_length,
2296 CHECK);
2297 cm->set_type_annotations(a);
2298 }
2299}
2300
2301
2302// Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2303// attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2304// Method* to save footprint, so we only know the size of the resulting Method* when the
2305// entire method attribute is parsed.
2306//
2307// The promoted_flags parameter is used to pass relevant access_flags
2308// from the method back up to the containing klass. These flag values
2309// are added to klass's access_flags.
2310
2311Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2312 bool is_interface,
2313 const ConstantPool* cp,
2314 AccessFlags* const promoted_flags,
2315 TRAPS) {
2316 assert(cfs != NULL, "invariant");
2317 assert(cp != NULL, "invariant");
2318 assert(promoted_flags != NULL, "invariant");
2319
2320 ResourceMark rm(THREAD);
2321 // Parse fixed parts:
2322 // access_flags, name_index, descriptor_index, attributes_count
2323 cfs->guarantee_more(8, CHECK_NULL);
2324
2325 int flags = cfs->get_u2_fast();
2326 const u2 name_index = cfs->get_u2_fast();
2327 const int cp_size = cp->length();
2328 check_property(
2329 valid_symbol_at(name_index),
2330 "Illegal constant pool index %u for method name in class file %s",
2331 name_index, CHECK_NULL);
2332 const Symbol* const name = cp->symbol_at(name_index);
2333 verify_legal_method_name(name, CHECK_NULL);
2334
2335 const u2 signature_index = cfs->get_u2_fast();
2336 guarantee_property(
2337 valid_symbol_at(signature_index),
2338 "Illegal constant pool index %u for method signature in class file %s",
2339 signature_index, CHECK_NULL);
2340 const Symbol* const signature = cp->symbol_at(signature_index);
2341
2342 if (name == vmSymbols::class_initializer_name()) {
2343 // We ignore the other access flags for a valid class initializer.
2344 // (JVM Spec 2nd ed., chapter 4.6)
2345 if (_major_version < 51) { // backward compatibility
2346 flags = JVM_ACC_STATIC;
2347 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2348 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2349 } else {
2350 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2351 }
2352 } else {
2353 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2354 }
2355
2356 if (name == vmSymbols::object_initializer_name() && is_interface) {
2357 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2358 }
2359
2360 int args_size = -1; // only used when _need_verify is true
2361 if (_need_verify) {
2362 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2363 verify_legal_method_signature(name, signature, CHECK_NULL);
2364 if (args_size > MAX_ARGS_SIZE) {
2365 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2366 }
2367 }
2368
2369 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2370
2371 // Default values for code and exceptions attribute elements
2372 u2 max_stack = 0;
2373 u2 max_locals = 0;
2374 u4 code_length = 0;
2375 const u1* code_start = 0;
2376 u2 exception_table_length = 0;
2377 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2378 Array<int>* exception_handlers = Universe::the_empty_int_array();
2379 u2 checked_exceptions_length = 0;
2380 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2381 CompressedLineNumberWriteStream* linenumber_table = NULL;
2382 int linenumber_table_length = 0;
2383 int total_lvt_length = 0;
2384 u2 lvt_cnt = 0;
2385 u2 lvtt_cnt = 0;
2386 bool lvt_allocated = false;
2387 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2388 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2389 u2* localvariable_table_length = NULL;
2390 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2391 u2* localvariable_type_table_length = NULL;
2392 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2393 int method_parameters_length = -1;
2394 const u1* method_parameters_data = NULL;
2395 bool method_parameters_seen = false;
2396 bool parsed_code_attribute = false;
2397 bool parsed_checked_exceptions_attribute = false;
2398 bool parsed_stackmap_attribute = false;
2399 // stackmap attribute - JDK1.5
2400 const u1* stackmap_data = NULL;
2401 int stackmap_data_length = 0;
2402 u2 generic_signature_index = 0;
2403 MethodAnnotationCollector parsed_annotations;
2404 const u1* runtime_visible_annotations = NULL;
2405 int runtime_visible_annotations_length = 0;
2406 const u1* runtime_invisible_annotations = NULL;
2407 int runtime_invisible_annotations_length = 0;
2408 const u1* runtime_visible_parameter_annotations = NULL;
2409 int runtime_visible_parameter_annotations_length = 0;
2410 const u1* runtime_invisible_parameter_annotations = NULL;
2411 int runtime_invisible_parameter_annotations_length = 0;
2412 const u1* runtime_visible_type_annotations = NULL;
2413 int runtime_visible_type_annotations_length = 0;
2414 const u1* runtime_invisible_type_annotations = NULL;
2415 int runtime_invisible_type_annotations_length = 0;
2416 bool runtime_invisible_annotations_exists = false;
2417 bool runtime_invisible_type_annotations_exists = false;
2418 bool runtime_invisible_parameter_annotations_exists = false;
2419 const u1* annotation_default = NULL;
2420 int annotation_default_length = 0;
2421
2422 // Parse code and exceptions attribute
2423 u2 method_attributes_count = cfs->get_u2_fast();
2424 while (method_attributes_count--) {
2425 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2426 const u2 method_attribute_name_index = cfs->get_u2_fast();
2427 const u4 method_attribute_length = cfs->get_u4_fast();
2428 check_property(
2429 valid_symbol_at(method_attribute_name_index),
2430 "Invalid method attribute name index %u in class file %s",
2431 method_attribute_name_index, CHECK_NULL);
2432
2433 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2434 if (method_attribute_name == vmSymbols::tag_code()) {
2435 // Parse Code attribute
2436 if (_need_verify) {
2437 guarantee_property(
2438 !access_flags.is_native() && !access_flags.is_abstract(),
2439 "Code attribute in native or abstract methods in class file %s",
2440 CHECK_NULL);
2441 }
2442 if (parsed_code_attribute) {
2443 classfile_parse_error("Multiple Code attributes in class file %s",
2444 CHECK_NULL);
2445 }
2446 parsed_code_attribute = true;
2447
2448 // Stack size, locals size, and code size
2449 if (_major_version == 45 && _minor_version <= 2) {
2450 cfs->guarantee_more(4, CHECK_NULL);
2451 max_stack = cfs->get_u1_fast();
2452 max_locals = cfs->get_u1_fast();
2453 code_length = cfs->get_u2_fast();
2454 } else {
2455 cfs->guarantee_more(8, CHECK_NULL);
2456 max_stack = cfs->get_u2_fast();
2457 max_locals = cfs->get_u2_fast();
2458 code_length = cfs->get_u4_fast();
2459 }
2460 if (_need_verify) {
2461 guarantee_property(args_size <= max_locals,
2462 "Arguments can't fit into locals in class file %s",
2463 CHECK_NULL);
2464 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2465 "Invalid method Code length %u in class file %s",
2466 code_length, CHECK_NULL);
2467 }
2468 // Code pointer
2469 code_start = cfs->current();
2470 assert(code_start != NULL, "null code start");
2471 cfs->guarantee_more(code_length, CHECK_NULL);
2472 cfs->skip_u1_fast(code_length);
2473
2474 // Exception handler table
2475 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2476 exception_table_length = cfs->get_u2_fast();
2477 if (exception_table_length > 0) {
2478 exception_table_start = parse_exception_table(cfs,
2479 code_length,
2480 exception_table_length,
2481 CHECK_NULL);
2482 }
2483
2484 // Parse additional attributes in code attribute
2485 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2486 u2 code_attributes_count = cfs->get_u2_fast();
2487
2488 unsigned int calculated_attribute_length = 0;
2489
2490 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2491 calculated_attribute_length =
2492 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2493 } else {
2494 // max_stack, locals and length are smaller in pre-version 45.2 classes
2495 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2496 }
2497 calculated_attribute_length +=
2498 code_length +
2499 sizeof(exception_table_length) +
2500 sizeof(code_attributes_count) +
2501 exception_table_length *
2502 ( sizeof(u2) + // start_pc
2503 sizeof(u2) + // end_pc
2504 sizeof(u2) + // handler_pc
2505 sizeof(u2) ); // catch_type_index
2506
2507 while (code_attributes_count--) {
2508 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2509 const u2 code_attribute_name_index = cfs->get_u2_fast();
2510 const u4 code_attribute_length = cfs->get_u4_fast();
2511 calculated_attribute_length += code_attribute_length +
2512 sizeof(code_attribute_name_index) +
2513 sizeof(code_attribute_length);
2514 check_property(valid_symbol_at(code_attribute_name_index),
2515 "Invalid code attribute name index %u in class file %s",
2516 code_attribute_name_index,
2517 CHECK_NULL);
2518 if (LoadLineNumberTables &&
2519 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2520 // Parse and compress line number table
2521 parse_linenumber_table(code_attribute_length,
2522 code_length,
2523 &linenumber_table,
2524 CHECK_NULL);
2525
2526 } else if (LoadLocalVariableTables &&
2527 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2528 // Parse local variable table
2529 if (!lvt_allocated) {
2530 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2531 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2532 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2533 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2534 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2535 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2536 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2537 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2538 lvt_allocated = true;
2539 }
2540 if (lvt_cnt == max_lvt_cnt) {
2541 max_lvt_cnt <<= 1;
2542 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2543 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2544 }
2545 localvariable_table_start[lvt_cnt] =
2546 parse_localvariable_table(cfs,
2547 code_length,
2548 max_locals,
2549 code_attribute_length,
2550 &localvariable_table_length[lvt_cnt],
2551 false, // is not LVTT
2552 CHECK_NULL);
2553 total_lvt_length += localvariable_table_length[lvt_cnt];
2554 lvt_cnt++;
2555 } else if (LoadLocalVariableTypeTables &&
2556 _major_version >= JAVA_1_5_VERSION &&
2557 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2558 if (!lvt_allocated) {
2559 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2560 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2561 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2562 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2563 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2564 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2565 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2566 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2567 lvt_allocated = true;
2568 }
2569 // Parse local variable type table
2570 if (lvtt_cnt == max_lvtt_cnt) {
2571 max_lvtt_cnt <<= 1;
2572 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2573 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2574 }
2575 localvariable_type_table_start[lvtt_cnt] =
2576 parse_localvariable_table(cfs,
2577 code_length,
2578 max_locals,
2579 code_attribute_length,
2580 &localvariable_type_table_length[lvtt_cnt],
2581 true, // is LVTT
2582 CHECK_NULL);
2583 lvtt_cnt++;
2584 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2585 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2586 // Stack map is only needed by the new verifier in JDK1.5.
2587 if (parsed_stackmap_attribute) {
2588 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2589 }
2590 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2591 stackmap_data_length = code_attribute_length;
2592 parsed_stackmap_attribute = true;
2593 } else {
2594 // Skip unknown attributes
2595 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2596 }
2597 }
2598 // check method attribute length
2599 if (_need_verify) {
2600 guarantee_property(method_attribute_length == calculated_attribute_length,
2601 "Code segment has wrong length in class file %s",
2602 CHECK_NULL);
2603 }
2604 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2605 // Parse Exceptions attribute
2606 if (parsed_checked_exceptions_attribute) {
2607 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2608 CHECK_NULL);
2609 }
2610 parsed_checked_exceptions_attribute = true;
2611 checked_exceptions_start =
2612 parse_checked_exceptions(cfs,
2613 &checked_exceptions_length,
2614 method_attribute_length,
2615 CHECK_NULL);
2616 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2617 // reject multiple method parameters
2618 if (method_parameters_seen) {
2619 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2620 CHECK_NULL);
2621 }
2622 method_parameters_seen = true;
2623 method_parameters_length = cfs->get_u1_fast();
2624 const u2 real_length = (method_parameters_length * 4u) + 1u;
2625 if (method_attribute_length != real_length) {
2626 classfile_parse_error(
2627 "Invalid MethodParameters method attribute length %u in class file",
2628 method_attribute_length, CHECK_NULL);
2629 }
2630 method_parameters_data = cfs->current();
2631 cfs->skip_u2_fast(method_parameters_length);
2632 cfs->skip_u2_fast(method_parameters_length);
2633 // ignore this attribute if it cannot be reflected
2634 if (!SystemDictionary::Parameter_klass_loaded())
2635 method_parameters_length = -1;
2636 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2637 if (method_attribute_length != 0) {
2638 classfile_parse_error(
2639 "Invalid Synthetic method attribute length %u in class file %s",
2640 method_attribute_length, CHECK_NULL);
2641 }
2642 // Should we check that there hasn't already been a synthetic attribute?
2643 access_flags.set_is_synthetic();
2644 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2645 if (method_attribute_length != 0) {
2646 classfile_parse_error(
2647 "Invalid Deprecated method attribute length %u in class file %s",
2648 method_attribute_length, CHECK_NULL);
2649 }
2650 } else if (_major_version >= JAVA_1_5_VERSION) {
2651 if (method_attribute_name == vmSymbols::tag_signature()) {
2652 if (generic_signature_index != 0) {
2653 classfile_parse_error(
2654 "Multiple Signature attributes for method in class file %s",
2655 CHECK_NULL);
2656 }
2657 if (method_attribute_length != 2) {
2658 classfile_parse_error(
2659 "Invalid Signature attribute length %u in class file %s",
2660 method_attribute_length, CHECK_NULL);
2661 }
2662 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2663 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2664 if (runtime_visible_annotations != NULL) {
2665 classfile_parse_error(
2666 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2667 CHECK_NULL);
2668 }
2669 runtime_visible_annotations_length = method_attribute_length;
2670 runtime_visible_annotations = cfs->current();
2671 assert(runtime_visible_annotations != NULL, "null visible annotations");
2672 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2673 parse_annotations(cp,
2674 runtime_visible_annotations,
2675 runtime_visible_annotations_length,
2676 &parsed_annotations,
2677 _loader_data,
2678 CHECK_NULL);
2679 cfs->skip_u1_fast(runtime_visible_annotations_length);
2680 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2681 if (runtime_invisible_annotations_exists) {
2682 classfile_parse_error(
2683 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2684 CHECK_NULL);
2685 }
2686 runtime_invisible_annotations_exists = true;
2687 if (PreserveAllAnnotations) {
2688 runtime_invisible_annotations_length = method_attribute_length;
2689 runtime_invisible_annotations = cfs->current();
2690 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2691 }
2692 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2693 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2694 if (runtime_visible_parameter_annotations != NULL) {
2695 classfile_parse_error(
2696 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2697 CHECK_NULL);
2698 }
2699 runtime_visible_parameter_annotations_length = method_attribute_length;
2700 runtime_visible_parameter_annotations = cfs->current();
2701 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2702 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2703 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2704 if (runtime_invisible_parameter_annotations_exists) {
2705 classfile_parse_error(
2706 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2707 CHECK_NULL);
2708 }
2709 runtime_invisible_parameter_annotations_exists = true;
2710 if (PreserveAllAnnotations) {
2711 runtime_invisible_parameter_annotations_length = method_attribute_length;
2712 runtime_invisible_parameter_annotations = cfs->current();
2713 assert(runtime_invisible_parameter_annotations != NULL,
2714 "null invisible parameter annotations");
2715 }
2716 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2717 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2718 if (annotation_default != NULL) {
2719 classfile_parse_error(
2720 "Multiple AnnotationDefault attributes for method in class file %s",
2721 CHECK_NULL);
2722 }
2723 annotation_default_length = method_attribute_length;
2724 annotation_default = cfs->current();
2725 assert(annotation_default != NULL, "null annotation default");
2726 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2727 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2728 if (runtime_visible_type_annotations != NULL) {
2729 classfile_parse_error(
2730 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2731 CHECK_NULL);
2732 }
2733 runtime_visible_type_annotations_length = method_attribute_length;
2734 runtime_visible_type_annotations = cfs->current();
2735 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2736 // No need for the VM to parse Type annotations
2737 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2738 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2739 if (runtime_invisible_type_annotations_exists) {
2740 classfile_parse_error(
2741 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2742 CHECK_NULL);
2743 } else {
2744 runtime_invisible_type_annotations_exists = true;
2745 }
2746 if (PreserveAllAnnotations) {
2747 runtime_invisible_type_annotations_length = method_attribute_length;
2748 runtime_invisible_type_annotations = cfs->current();
2749 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2750 }
2751 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2752 } else {
2753 // Skip unknown attributes
2754 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2755 }
2756 } else {
2757 // Skip unknown attributes
2758 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2759 }
2760 }
2761
2762 if (linenumber_table != NULL) {
2763 linenumber_table->write_terminator();
2764 linenumber_table_length = linenumber_table->position();
2765 }
2766
2767 // Make sure there's at least one Code attribute in non-native/non-abstract method
2768 if (_need_verify) {
2769 guarantee_property(access_flags.is_native() ||
2770 access_flags.is_abstract() ||
2771 parsed_code_attribute,
2772 "Absent Code attribute in method that is not native or abstract in class file %s",
2773 CHECK_NULL);
2774 }
2775
2776 // All sizing information for a Method* is finally available, now create it
2777 InlineTableSizes sizes(
2778 total_lvt_length,
2779 linenumber_table_length,
2780 exception_table_length,
2781 checked_exceptions_length,
2782 method_parameters_length,
2783 generic_signature_index,
2784 runtime_visible_annotations_length +
2785 runtime_invisible_annotations_length,
2786 runtime_visible_parameter_annotations_length +
2787 runtime_invisible_parameter_annotations_length,
2788 runtime_visible_type_annotations_length +
2789 runtime_invisible_type_annotations_length,
2790 annotation_default_length,
2791 0);
2792
2793 Method* const m = Method::allocate(_loader_data,
2794 code_length,
2795 access_flags,
2796 &sizes,
2797 ConstMethod::NORMAL,
2798 CHECK_NULL);
2799
2800 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2801
2802 // Fill in information from fixed part (access_flags already set)
2803 m->set_constants(_cp);
2804 m->set_name_index(name_index);
2805 m->set_signature_index(signature_index);
2806
2807 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2808 m->constMethod()->set_result_type(rtf.type());
2809
2810 if (args_size >= 0) {
2811 m->set_size_of_parameters(args_size);
2812 } else {
2813 m->compute_size_of_parameters(THREAD);
2814 }
2815#ifdef ASSERT
2816 if (args_size >= 0) {
2817 m->compute_size_of_parameters(THREAD);
2818 assert(args_size == m->size_of_parameters(), "");
2819 }
2820#endif
2821
2822 // Fill in code attribute information
2823 m->set_max_stack(max_stack);
2824 m->set_max_locals(max_locals);
2825 if (stackmap_data != NULL) {
2826 m->constMethod()->copy_stackmap_data(_loader_data,
2827 (u1*)stackmap_data,
2828 stackmap_data_length,
2829 CHECK_NULL);
2830 }
2831
2832 // Copy byte codes
2833 m->set_code((u1*)code_start);
2834
2835 // Copy line number table
2836 if (linenumber_table != NULL) {
2837 memcpy(m->compressed_linenumber_table(),
2838 linenumber_table->buffer(),
2839 linenumber_table_length);
2840 }
2841
2842 // Copy exception table
2843 if (exception_table_length > 0) {
2844 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2845 m->exception_table_start(),
2846 exception_table_length * sizeof(ExceptionTableElement),
2847 sizeof(u2));
2848 }
2849
2850 // Copy method parameters
2851 if (method_parameters_length > 0) {
2852 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2853 for (int i = 0; i < method_parameters_length; i++) {
2854 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2855 method_parameters_data += 2;
2856 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2857 method_parameters_data += 2;
2858 }
2859 }
2860
2861 // Copy checked exceptions
2862 if (checked_exceptions_length > 0) {
2863 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2864 m->checked_exceptions_start(),
2865 checked_exceptions_length * sizeof(CheckedExceptionElement),
2866 sizeof(u2));
2867 }
2868
2869 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2870 if (total_lvt_length > 0) {
2871 promoted_flags->set_has_localvariable_table();
2872 copy_localvariable_table(m->constMethod(),
2873 lvt_cnt,
2874 localvariable_table_length,
2875 localvariable_table_start,
2876 lvtt_cnt,
2877 localvariable_type_table_length,
2878 localvariable_type_table_start,
2879 CHECK_NULL);
2880 }
2881
2882 if (parsed_annotations.has_any_annotations())
2883 parsed_annotations.apply_to(m);
2884
2885 // Copy annotations
2886 copy_method_annotations(m->constMethod(),
2887 runtime_visible_annotations,
2888 runtime_visible_annotations_length,
2889 runtime_invisible_annotations,
2890 runtime_invisible_annotations_length,
2891 runtime_visible_parameter_annotations,
2892 runtime_visible_parameter_annotations_length,
2893 runtime_invisible_parameter_annotations,
2894 runtime_invisible_parameter_annotations_length,
2895 runtime_visible_type_annotations,
2896 runtime_visible_type_annotations_length,
2897 runtime_invisible_type_annotations,
2898 runtime_invisible_type_annotations_length,
2899 annotation_default,
2900 annotation_default_length,
2901 CHECK_NULL);
2902
2903 if (name == vmSymbols::finalize_method_name() &&
2904 signature == vmSymbols::void_method_signature()) {
2905 if (m->is_empty_method()) {
2906 _has_empty_finalizer = true;
2907 } else {
2908 _has_finalizer = true;
2909 }
2910 }
2911 if (name == vmSymbols::object_initializer_name() &&
2912 signature == vmSymbols::void_method_signature() &&
2913 m->is_vanilla_constructor()) {
2914 _has_vanilla_constructor = true;
2915 }
2916
2917 NOT_PRODUCT(m->verify());
2918 return m;
2919}
2920
2921
2922// The promoted_flags parameter is used to pass relevant access_flags
2923// from the methods back up to the containing klass. These flag values
2924// are added to klass's access_flags.
2925// Side-effects: populates the _methods field in the parser
2926void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2927 bool is_interface,
2928 AccessFlags* promoted_flags,
2929 bool* has_final_method,
2930 bool* declares_nonstatic_concrete_methods,
2931 TRAPS) {
2932 assert(cfs != NULL, "invariant");
2933 assert(promoted_flags != NULL, "invariant");
2934 assert(has_final_method != NULL, "invariant");
2935 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2936
2937 assert(NULL == _methods, "invariant");
2938
2939 cfs->guarantee_more(2, CHECK); // length
2940 const u2 length = cfs->get_u2_fast();
2941 if (length == 0) {
2942 _methods = Universe::the_empty_method_array();
2943 } else {
2944 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2945 length,
2946 NULL,
2947 CHECK);
2948
2949 for (int index = 0; index < length; index++) {
2950 Method* method = parse_method(cfs,
2951 is_interface,
2952 _cp,
2953 promoted_flags,
2954 CHECK);
2955
2956 if (method->is_final()) {
2957 *has_final_method = true;
2958 }
2959 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2960 // used for interface initialization, and default method inheritance analysis
2961 if (is_interface && !(*declares_nonstatic_concrete_methods)
2962 && !method->is_abstract() && !method->is_static()) {
2963 *declares_nonstatic_concrete_methods = true;
2964 }
2965 _methods->at_put(index, method);
2966 }
2967
2968 if (_need_verify && length > 1) {
2969 // Check duplicated methods
2970 ResourceMark rm(THREAD);
2971 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2972 THREAD, NameSigHash*, HASH_ROW_SIZE);
2973 initialize_hashtable(names_and_sigs);
2974 bool dup = false;
2975 const Symbol* name = NULL;
2976 const Symbol* sig = NULL;
2977 {
2978 debug_only(NoSafepointVerifier nsv;)
2979 for (int i = 0; i < length; i++) {
2980 const Method* const m = _methods->at(i);
2981 name = m->name();
2982 sig = m->signature();
2983 // If no duplicates, add name/signature in hashtable names_and_sigs.
2984 if (!put_after_lookup(name, sig, names_and_sigs)) {
2985 dup = true;
2986 break;
2987 }
2988 }
2989 }
2990 if (dup) {
2991 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2992 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2993 }
2994 }
2995 }
2996}
2997
2998static const intArray* sort_methods(Array<Method*>* methods) {
2999 const int length = methods->length();
3000 // If JVMTI original method ordering or sharing is enabled we have to
3001 // remember the original class file ordering.
3002 // We temporarily use the vtable_index field in the Method* to store the
3003 // class file index, so we can read in after calling qsort.
3004 // Put the method ordering in the shared archive.
3005 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3006 for (int index = 0; index < length; index++) {
3007 Method* const m = methods->at(index);
3008 assert(!m->valid_vtable_index(), "vtable index should not be set");
3009 m->set_vtable_index(index);
3010 }
3011 }
3012 // Sort method array by ascending method name (for faster lookups & vtable construction)
3013 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3014 Method::sort_methods(methods);
3015
3016 intArray* method_ordering = NULL;
3017 // If JVMTI original method ordering or sharing is enabled construct int
3018 // array remembering the original ordering
3019 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3020 method_ordering = new intArray(length, length, -1);
3021 for (int index = 0; index < length; index++) {
3022 Method* const m = methods->at(index);
3023 const int old_index = m->vtable_index();
3024 assert(old_index >= 0 && old_index < length, "invalid method index");
3025 method_ordering->at_put(index, old_index);
3026 m->set_vtable_index(Method::invalid_vtable_index);
3027 }
3028 }
3029 return method_ordering;
3030}
3031
3032// Parse generic_signature attribute for methods and fields
3033u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3034 TRAPS) {
3035 assert(cfs != NULL, "invariant");
3036
3037 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3038 const u2 generic_signature_index = cfs->get_u2_fast();
3039 check_property(
3040 valid_symbol_at(generic_signature_index),
3041 "Invalid Signature attribute at constant pool index %u in class file %s",
3042 generic_signature_index, CHECK_0);
3043 return generic_signature_index;
3044}
3045
3046void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3047 TRAPS) {
3048
3049 assert(cfs != NULL, "invariant");
3050
3051 cfs->guarantee_more(2, CHECK); // sourcefile_index
3052 const u2 sourcefile_index = cfs->get_u2_fast();
3053 check_property(
3054 valid_symbol_at(sourcefile_index),
3055 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3056 sourcefile_index, CHECK);
3057 set_class_sourcefile_index(sourcefile_index);
3058}
3059
3060void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3061 int length,
3062 TRAPS) {
3063 assert(cfs != NULL, "invariant");
3064
3065 const u1* const sde_buffer = cfs->current();
3066 assert(sde_buffer != NULL, "null sde buffer");
3067
3068 // Don't bother storing it if there is no way to retrieve it
3069 if (JvmtiExport::can_get_source_debug_extension()) {
3070 assert((length+1) > length, "Overflow checking");
3071 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3072 for (int i = 0; i < length; i++) {
3073 sde[i] = sde_buffer[i];
3074 }
3075 sde[length] = '\0';
3076 set_class_sde_buffer((const char*)sde, length);
3077 }
3078 // Got utf8 string, set stream position forward
3079 cfs->skip_u1(length, CHECK);
3080}
3081
3082
3083// Inner classes can be static, private or protected (classic VM does this)
3084#define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3085 JVM_ACC_PRIVATE | \
3086 JVM_ACC_PROTECTED | \
3087 JVM_ACC_STATIC \
3088 )
3089
3090// Return number of classes in the inner classes attribute table
3091u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3092 const u1* const inner_classes_attribute_start,
3093 bool parsed_enclosingmethod_attribute,
3094 u2 enclosing_method_class_index,
3095 u2 enclosing_method_method_index,
3096 TRAPS) {
3097 const u1* const current_mark = cfs->current();
3098 u2 length = 0;
3099 if (inner_classes_attribute_start != NULL) {
3100 cfs->set_current(inner_classes_attribute_start);
3101 cfs->guarantee_more(2, CHECK_0); // length
3102 length = cfs->get_u2_fast();
3103 }
3104
3105 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3106 // method data:
3107 // [inner_class_info_index,
3108 // outer_class_info_index,
3109 // inner_name_index,
3110 // inner_class_access_flags,
3111 // ...
3112 // enclosing_method_class_index,
3113 // enclosing_method_method_index]
3114 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3115 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3116 _inner_classes = inner_classes;
3117
3118 int index = 0;
3119 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3120 for (int n = 0; n < length; n++) {
3121 // Inner class index
3122 const u2 inner_class_info_index = cfs->get_u2_fast();
3123 check_property(
3124 valid_klass_reference_at(inner_class_info_index),
3125 "inner_class_info_index %u has bad constant type in class file %s",
3126 inner_class_info_index, CHECK_0);
3127 // Outer class index
3128 const u2 outer_class_info_index = cfs->get_u2_fast();
3129 check_property(
3130 outer_class_info_index == 0 ||
3131 valid_klass_reference_at(outer_class_info_index),
3132 "outer_class_info_index %u has bad constant type in class file %s",
3133 outer_class_info_index, CHECK_0);
3134 // Inner class name
3135 const u2 inner_name_index = cfs->get_u2_fast();
3136 check_property(
3137 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3138 "inner_name_index %u has bad constant type in class file %s",
3139 inner_name_index, CHECK_0);
3140 if (_need_verify) {
3141 guarantee_property(inner_class_info_index != outer_class_info_index,
3142 "Class is both outer and inner class in class file %s", CHECK_0);
3143 }
3144 // Access flags
3145 jint flags;
3146 // JVM_ACC_MODULE is defined in JDK-9 and later.
3147 if (_major_version >= JAVA_9_VERSION) {
3148 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3149 } else {
3150 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3151 }
3152 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3153 // Set abstract bit for old class files for backward compatibility
3154 flags |= JVM_ACC_ABSTRACT;
3155 }
3156 verify_legal_class_modifiers(flags, CHECK_0);
3157 AccessFlags inner_access_flags(flags);
3158
3159 inner_classes->at_put(index++, inner_class_info_index);
3160 inner_classes->at_put(index++, outer_class_info_index);
3161 inner_classes->at_put(index++, inner_name_index);
3162 inner_classes->at_put(index++, inner_access_flags.as_short());
3163 }
3164
3165 // 4347400: make sure there's no duplicate entry in the classes array
3166 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3167 for(int i = 0; i < length * 4; i += 4) {
3168 for(int j = i + 4; j < length * 4; j += 4) {
3169 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3170 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3171 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3172 inner_classes->at(i+3) != inner_classes->at(j+3)),
3173 "Duplicate entry in InnerClasses in class file %s",
3174 CHECK_0);
3175 }
3176 }
3177 }
3178
3179 // Set EnclosingMethod class and method indexes.
3180 if (parsed_enclosingmethod_attribute) {
3181 inner_classes->at_put(index++, enclosing_method_class_index);
3182 inner_classes->at_put(index++, enclosing_method_method_index);
3183 }
3184 assert(index == size, "wrong size");
3185
3186 // Restore buffer's current position.
3187 cfs->set_current(current_mark);
3188
3189 return length;
3190}
3191
3192u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3193 const u1* const nest_members_attribute_start,
3194 TRAPS) {
3195 const u1* const current_mark = cfs->current();
3196 u2 length = 0;
3197 if (nest_members_attribute_start != NULL) {
3198 cfs->set_current(nest_members_attribute_start);
3199 cfs->guarantee_more(2, CHECK_0); // length
3200 length = cfs->get_u2_fast();
3201 }
3202 const int size = length;
3203 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3204 _nest_members = nest_members;
3205
3206 int index = 0;
3207 cfs->guarantee_more(2 * length, CHECK_0);
3208 for (int n = 0; n < length; n++) {
3209 const u2 class_info_index = cfs->get_u2_fast();
3210 check_property(
3211 valid_klass_reference_at(class_info_index),
3212 "Nest member class_info_index %u has bad constant type in class file %s",
3213 class_info_index, CHECK_0);
3214 nest_members->at_put(index++, class_info_index);
3215 }
3216 assert(index == size, "wrong size");
3217
3218 // Restore buffer's current position.
3219 cfs->set_current(current_mark);
3220
3221 return length;
3222}
3223
3224void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3225 set_class_synthetic_flag(true);
3226}
3227
3228void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3229 assert(cfs != NULL, "invariant");
3230
3231 const u2 signature_index = cfs->get_u2(CHECK);
3232 check_property(
3233 valid_symbol_at(signature_index),
3234 "Invalid constant pool index %u in Signature attribute in class file %s",
3235 signature_index, CHECK);
3236 set_class_generic_signature_index(signature_index);
3237}
3238
3239void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3240 ConstantPool* cp,
3241 u4 attribute_byte_length,
3242 TRAPS) {
3243 assert(cfs != NULL, "invariant");
3244 assert(cp != NULL, "invariant");
3245
3246 const u1* const current_start = cfs->current();
3247
3248 guarantee_property(attribute_byte_length >= sizeof(u2),
3249 "Invalid BootstrapMethods attribute length %u in class file %s",
3250 attribute_byte_length,
3251 CHECK);
3252
3253 cfs->guarantee_more(attribute_byte_length, CHECK);
3254
3255 const int attribute_array_length = cfs->get_u2_fast();
3256
3257 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3258 "Short length on BootstrapMethods in class file %s",
3259 CHECK);
3260
3261
3262 // The attribute contains a counted array of counted tuples of shorts,
3263 // represending bootstrap specifiers:
3264 // length*{bootstrap_method_index, argument_count*{argument_index}}
3265 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3266 // operand_count = number of shorts in attr, except for leading length
3267
3268 // The attribute is copied into a short[] array.
3269 // The array begins with a series of short[2] pairs, one for each tuple.
3270 const int index_size = (attribute_array_length * 2);
3271
3272 Array<u2>* const operands =
3273 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3274
3275 // Eagerly assign operands so they will be deallocated with the constant
3276 // pool if there is an error.
3277 cp->set_operands(operands);
3278
3279 int operand_fill_index = index_size;
3280 const int cp_size = cp->length();
3281
3282 for (int n = 0; n < attribute_array_length; n++) {
3283 // Store a 32-bit offset into the header of the operand array.
3284 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3285
3286 // Read a bootstrap specifier.
3287 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3288 const u2 bootstrap_method_index = cfs->get_u2_fast();
3289 const u2 argument_count = cfs->get_u2_fast();
3290 check_property(
3291 valid_cp_range(bootstrap_method_index, cp_size) &&
3292 cp->tag_at(bootstrap_method_index).is_method_handle(),
3293 "bootstrap_method_index %u has bad constant type in class file %s",
3294 bootstrap_method_index,
3295 CHECK);
3296
3297 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3298 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3299 CHECK);
3300
3301 operands->at_put(operand_fill_index++, bootstrap_method_index);
3302 operands->at_put(operand_fill_index++, argument_count);
3303
3304 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3305 for (int j = 0; j < argument_count; j++) {
3306 const u2 argument_index = cfs->get_u2_fast();
3307 check_property(
3308 valid_cp_range(argument_index, cp_size) &&
3309 cp->tag_at(argument_index).is_loadable_constant(),
3310 "argument_index %u has bad constant type in class file %s",
3311 argument_index,
3312 CHECK);
3313 operands->at_put(operand_fill_index++, argument_index);
3314 }
3315 }
3316 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3317 "Bad length on BootstrapMethods in class file %s",
3318 CHECK);
3319}
3320
3321void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3322 ConstantPool* cp,
3323 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3324 TRAPS) {
3325 assert(cfs != NULL, "invariant");
3326 assert(cp != NULL, "invariant");
3327 assert(parsed_annotations != NULL, "invariant");
3328
3329 // Set inner classes attribute to default sentinel
3330 _inner_classes = Universe::the_empty_short_array();
3331 // Set nest members attribute to default sentinel
3332 _nest_members = Universe::the_empty_short_array();
3333 cfs->guarantee_more(2, CHECK); // attributes_count
3334 u2 attributes_count = cfs->get_u2_fast();
3335 bool parsed_sourcefile_attribute = false;
3336 bool parsed_innerclasses_attribute = false;
3337 bool parsed_nest_members_attribute = false;
3338 bool parsed_nest_host_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 const u1* nest_members_attribute_start = NULL;
3357 u4 nest_members_attribute_length = 0;
3358
3359 // Iterate over attributes
3360 while (attributes_count--) {
3361 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3362 const u2 attribute_name_index = cfs->get_u2_fast();
3363 const u4 attribute_length = cfs->get_u4_fast();
3364 check_property(
3365 valid_symbol_at(attribute_name_index),
3366 "Attribute name has bad constant pool index %u in class file %s",
3367 attribute_name_index, CHECK);
3368 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3369 if (tag == vmSymbols::tag_source_file()) {
3370 // Check for SourceFile tag
3371 if (_need_verify) {
3372 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3373 }
3374 if (parsed_sourcefile_attribute) {
3375 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3376 } else {
3377 parsed_sourcefile_attribute = true;
3378 }
3379 parse_classfile_sourcefile_attribute(cfs, CHECK);
3380 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3381 // Check for SourceDebugExtension tag
3382 if (parsed_source_debug_ext_annotations_exist) {
3383 classfile_parse_error(
3384 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3385 }
3386 parsed_source_debug_ext_annotations_exist = true;
3387 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3388 } else if (tag == vmSymbols::tag_inner_classes()) {
3389 // Check for InnerClasses tag
3390 if (parsed_innerclasses_attribute) {
3391 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3392 } else {
3393 parsed_innerclasses_attribute = true;
3394 }
3395 inner_classes_attribute_start = cfs->current();
3396 inner_classes_attribute_length = attribute_length;
3397 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3398 } else if (tag == vmSymbols::tag_synthetic()) {
3399 // Check for Synthetic tag
3400 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3401 if (attribute_length != 0) {
3402 classfile_parse_error(
3403 "Invalid Synthetic classfile attribute length %u in class file %s",
3404 attribute_length, CHECK);
3405 }
3406 parse_classfile_synthetic_attribute(CHECK);
3407 } else if (tag == vmSymbols::tag_deprecated()) {
3408 // Check for Deprecatd tag - 4276120
3409 if (attribute_length != 0) {
3410 classfile_parse_error(
3411 "Invalid Deprecated classfile attribute length %u in class file %s",
3412 attribute_length, CHECK);
3413 }
3414 } else if (_major_version >= JAVA_1_5_VERSION) {
3415 if (tag == vmSymbols::tag_signature()) {
3416 if (_generic_signature_index != 0) {
3417 classfile_parse_error(
3418 "Multiple Signature attributes in class file %s", CHECK);
3419 }
3420 if (attribute_length != 2) {
3421 classfile_parse_error(
3422 "Wrong Signature attribute length %u in class file %s",
3423 attribute_length, CHECK);
3424 }
3425 parse_classfile_signature_attribute(cfs, CHECK);
3426 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3427 if (runtime_visible_annotations != NULL) {
3428 classfile_parse_error(
3429 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3430 }
3431 runtime_visible_annotations_length = attribute_length;
3432 runtime_visible_annotations = cfs->current();
3433 assert(runtime_visible_annotations != NULL, "null visible annotations");
3434 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3435 parse_annotations(cp,
3436 runtime_visible_annotations,
3437 runtime_visible_annotations_length,
3438 parsed_annotations,
3439 _loader_data,
3440 CHECK);
3441 cfs->skip_u1_fast(runtime_visible_annotations_length);
3442 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3443 if (runtime_invisible_annotations_exists) {
3444 classfile_parse_error(
3445 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3446 }
3447 runtime_invisible_annotations_exists = true;
3448 if (PreserveAllAnnotations) {
3449 runtime_invisible_annotations_length = attribute_length;
3450 runtime_invisible_annotations = cfs->current();
3451 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3452 }
3453 cfs->skip_u1(attribute_length, CHECK);
3454 } else if (tag == vmSymbols::tag_enclosing_method()) {
3455 if (parsed_enclosingmethod_attribute) {
3456 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3457 } else {
3458 parsed_enclosingmethod_attribute = true;
3459 }
3460 guarantee_property(attribute_length == 4,
3461 "Wrong EnclosingMethod attribute length %u in class file %s",
3462 attribute_length, CHECK);
3463 cfs->guarantee_more(4, CHECK); // class_index, method_index
3464 enclosing_method_class_index = cfs->get_u2_fast();
3465 enclosing_method_method_index = cfs->get_u2_fast();
3466 if (enclosing_method_class_index == 0) {
3467 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3468 }
3469 // Validate the constant pool indices and types
3470 check_property(valid_klass_reference_at(enclosing_method_class_index),
3471 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3472 if (enclosing_method_method_index != 0 &&
3473 (!cp->is_within_bounds(enclosing_method_method_index) ||
3474 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3475 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3476 }
3477 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3478 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3479 if (parsed_bootstrap_methods_attribute) {
3480 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3481 }
3482 parsed_bootstrap_methods_attribute = true;
3483 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3484 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3485 if (runtime_visible_type_annotations != NULL) {
3486 classfile_parse_error(
3487 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3488 }
3489 runtime_visible_type_annotations_length = attribute_length;
3490 runtime_visible_type_annotations = cfs->current();
3491 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3492 // No need for the VM to parse Type annotations
3493 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3494 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3495 if (runtime_invisible_type_annotations_exists) {
3496 classfile_parse_error(
3497 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3498 } else {
3499 runtime_invisible_type_annotations_exists = true;
3500 }
3501 if (PreserveAllAnnotations) {
3502 runtime_invisible_type_annotations_length = attribute_length;
3503 runtime_invisible_type_annotations = cfs->current();
3504 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3505 }
3506 cfs->skip_u1(attribute_length, CHECK);
3507 } else if (_major_version >= JAVA_11_VERSION) {
3508 if (tag == vmSymbols::tag_nest_members()) {
3509 // Check for NestMembers tag
3510 if (parsed_nest_members_attribute) {
3511 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3512 } else {
3513 parsed_nest_members_attribute = true;
3514 }
3515 if (parsed_nest_host_attribute) {
3516 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3517 }
3518 nest_members_attribute_start = cfs->current();
3519 nest_members_attribute_length = attribute_length;
3520 cfs->skip_u1(nest_members_attribute_length, CHECK);
3521 } else if (tag == vmSymbols::tag_nest_host()) {
3522 if (parsed_nest_host_attribute) {
3523 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3524 } else {
3525 parsed_nest_host_attribute = true;
3526 }
3527 if (parsed_nest_members_attribute) {
3528 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3529 }
3530 if (_need_verify) {
3531 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3532 }
3533 cfs->guarantee_more(2, CHECK);
3534 u2 class_info_index = cfs->get_u2_fast();
3535 check_property(
3536 valid_klass_reference_at(class_info_index),
3537 "Nest-host class_info_index %u has bad constant type in class file %s",
3538 class_info_index, CHECK);
3539 _nest_host = class_info_index;
3540 } else {
3541 // Unknown attribute
3542 cfs->skip_u1(attribute_length, CHECK);
3543 }
3544 } else {
3545 // Unknown attribute
3546 cfs->skip_u1(attribute_length, CHECK);
3547 }
3548 } else {
3549 // Unknown attribute
3550 cfs->skip_u1(attribute_length, CHECK);
3551 }
3552 }
3553 _annotations = assemble_annotations(runtime_visible_annotations,
3554 runtime_visible_annotations_length,
3555 runtime_invisible_annotations,
3556 runtime_invisible_annotations_length,
3557 CHECK);
3558 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3559 runtime_visible_type_annotations_length,
3560 runtime_invisible_type_annotations,
3561 runtime_invisible_type_annotations_length,
3562 CHECK);
3563
3564 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3565 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3566 cfs,
3567 inner_classes_attribute_start,
3568 parsed_innerclasses_attribute,
3569 enclosing_method_class_index,
3570 enclosing_method_method_index,
3571 CHECK);
3572 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3573 guarantee_property(
3574 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3575 "Wrong InnerClasses attribute length in class file %s", CHECK);
3576 }
3577 }
3578
3579 if (parsed_nest_members_attribute) {
3580 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3581 cfs,
3582 nest_members_attribute_start,
3583 CHECK);
3584 if (_need_verify) {
3585 guarantee_property(
3586 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3587 "Wrong NestMembers attribute length in class file %s", CHECK);
3588 }
3589 }
3590
3591 if (_max_bootstrap_specifier_index >= 0) {
3592 guarantee_property(parsed_bootstrap_methods_attribute,
3593 "Missing BootstrapMethods attribute in class file %s", CHECK);
3594 }
3595}
3596
3597void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3598 assert(k != NULL, "invariant");
3599
3600 if (_synthetic_flag)
3601 k->set_is_synthetic();
3602 if (_sourcefile_index != 0) {
3603 k->set_source_file_name_index(_sourcefile_index);
3604 }
3605 if (_generic_signature_index != 0) {
3606 k->set_generic_signature_index(_generic_signature_index);
3607 }
3608 if (_sde_buffer != NULL) {
3609 k->set_source_debug_extension(_sde_buffer, _sde_length);
3610 }
3611}
3612
3613// Create the Annotations object that will
3614// hold the annotations array for the Klass.
3615void ClassFileParser::create_combined_annotations(TRAPS) {
3616 if (_annotations == NULL &&
3617 _type_annotations == NULL &&
3618 _fields_annotations == NULL &&
3619 _fields_type_annotations == NULL) {
3620 // Don't create the Annotations object unnecessarily.
3621 return;
3622 }
3623
3624 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3625 annotations->set_class_annotations(_annotations);
3626 annotations->set_class_type_annotations(_type_annotations);
3627 annotations->set_fields_annotations(_fields_annotations);
3628 annotations->set_fields_type_annotations(_fields_type_annotations);
3629
3630 // This is the Annotations object that will be
3631 // assigned to InstanceKlass being constructed.
3632 _combined_annotations = annotations;
3633
3634 // The annotations arrays below has been transfered the
3635 // _combined_annotations so these fields can now be cleared.
3636 _annotations = NULL;
3637 _type_annotations = NULL;
3638 _fields_annotations = NULL;
3639 _fields_type_annotations = NULL;
3640}
3641
3642// Transfer ownership of metadata allocated to the InstanceKlass.
3643void ClassFileParser::apply_parsed_class_metadata(
3644 InstanceKlass* this_klass,
3645 int java_fields_count, TRAPS) {
3646 assert(this_klass != NULL, "invariant");
3647
3648 _cp->set_pool_holder(this_klass);
3649 this_klass->set_constants(_cp);
3650 this_klass->set_fields(_fields, java_fields_count);
3651 this_klass->set_methods(_methods);
3652 this_klass->set_inner_classes(_inner_classes);
3653 this_klass->set_nest_members(_nest_members);
3654 this_klass->set_nest_host_index(_nest_host);
3655 this_klass->set_local_interfaces(_local_interfaces);
3656 this_klass->set_annotations(_combined_annotations);
3657 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3658 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3659 // its _super. If an OOM occurs while loading the current klass, its _super field
3660 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3661 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3662 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3663
3664 // Clear out these fields so they don't get deallocated by the destructor
3665 clear_class_metadata();
3666}
3667
3668AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3669 int runtime_visible_annotations_length,
3670 const u1* const runtime_invisible_annotations,
3671 int runtime_invisible_annotations_length,
3672 TRAPS) {
3673 AnnotationArray* annotations = NULL;
3674 if (runtime_visible_annotations != NULL ||
3675 runtime_invisible_annotations != NULL) {
3676 annotations = MetadataFactory::new_array<u1>(_loader_data,
3677 runtime_visible_annotations_length +
3678 runtime_invisible_annotations_length,
3679 CHECK_(annotations));
3680 if (runtime_visible_annotations != NULL) {
3681 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3682 annotations->at_put(i, runtime_visible_annotations[i]);
3683 }
3684 }
3685 if (runtime_invisible_annotations != NULL) {
3686 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3687 int append = runtime_visible_annotations_length+i;
3688 annotations->at_put(append, runtime_invisible_annotations[i]);
3689 }
3690 }
3691 }
3692 return annotations;
3693}
3694
3695const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3696 const int super_class_index,
3697 const bool need_verify,
3698 TRAPS) {
3699 assert(cp != NULL, "invariant");
3700 const InstanceKlass* super_klass = NULL;
3701
3702 if (super_class_index == 0) {
3703 check_property(_class_name == vmSymbols::java_lang_Object(),
3704 "Invalid superclass index %u in class file %s",
3705 super_class_index,
3706 CHECK_NULL);
3707 } else {
3708 check_property(valid_klass_reference_at(super_class_index),
3709 "Invalid superclass index %u in class file %s",
3710 super_class_index,
3711 CHECK_NULL);
3712 // The class name should be legal because it is checked when parsing constant pool.
3713 // However, make sure it is not an array type.
3714 bool is_array = false;
3715 if (cp->tag_at(super_class_index).is_klass()) {
3716 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3717 if (need_verify)
3718 is_array = super_klass->is_array_klass();
3719 } else if (need_verify) {
3720 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3721 }
3722 if (need_verify) {
3723 guarantee_property(!is_array,
3724 "Bad superclass name in class file %s", CHECK_NULL);
3725 }
3726 }
3727 return super_klass;
3728}
3729
3730static unsigned int compute_oop_map_count(const InstanceKlass* super,
3731 unsigned int nonstatic_oop_map_count,
3732 int first_nonstatic_oop_offset) {
3733
3734 unsigned int map_count =
3735 NULL == super ? 0 : super->nonstatic_oop_map_count();
3736 if (nonstatic_oop_map_count > 0) {
3737 // We have oops to add to map
3738 if (map_count == 0) {
3739 map_count = nonstatic_oop_map_count;
3740 }
3741 else {
3742 // Check whether we should add a new map block or whether the last one can
3743 // be extended
3744 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3745 const OopMapBlock* const last_map = first_map + map_count - 1;
3746
3747 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3748 if (next_offset == first_nonstatic_oop_offset) {
3749 // There is no gap bettwen superklass's last oop field and first
3750 // local oop field, merge maps.
3751 nonstatic_oop_map_count -= 1;
3752 }
3753 else {
3754 // Superklass didn't end with a oop field, add extra maps
3755 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3756 }
3757 map_count += nonstatic_oop_map_count;
3758 }
3759 }
3760 return map_count;
3761}
3762
3763#ifndef PRODUCT
3764static void print_field_layout(const Symbol* name,
3765 Array<u2>* fields,
3766 const constantPoolHandle& cp,
3767 int instance_size,
3768 int instance_fields_start,
3769 int instance_fields_end,
3770 int static_fields_end) {
3771
3772 assert(name != NULL, "invariant");
3773
3774 tty->print("%s: field layout\n", name->as_klass_external_name());
3775 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3776 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3777 if (!fs.access_flags().is_static()) {
3778 tty->print(" @%3d \"%s\" %s\n",
3779 fs.offset(),
3780 fs.name()->as_klass_external_name(),
3781 fs.signature()->as_klass_external_name());
3782 }
3783 }
3784 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3785 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3786 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3787 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3788 if (fs.access_flags().is_static()) {
3789 tty->print(" @%3d \"%s\" %s\n",
3790 fs.offset(),
3791 fs.name()->as_klass_external_name(),
3792 fs.signature()->as_klass_external_name());
3793 }
3794 }
3795 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3796 tty->print("\n");
3797}
3798#endif
3799
3800// Values needed for oopmap and InstanceKlass creation
3801class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3802 public:
3803 int* nonstatic_oop_offsets;
3804 unsigned int* nonstatic_oop_counts;
3805 unsigned int nonstatic_oop_map_count;
3806 unsigned int total_oop_map_count;
3807 int instance_size;
3808 int nonstatic_field_size;
3809 int static_field_size;
3810 bool has_nonstatic_fields;
3811};
3812
3813// Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3814void ClassFileParser::layout_fields(ConstantPool* cp,
3815 const FieldAllocationCount* fac,
3816 const ClassAnnotationCollector* parsed_annotations,
3817 FieldLayoutInfo* info,
3818 TRAPS) {
3819
3820 assert(cp != NULL, "invariant");
3821
3822 // Field size and offset computation
3823 int nonstatic_field_size = _super_klass == NULL ? 0 :
3824 _super_klass->nonstatic_field_size();
3825
3826 // Count the contended fields by type.
3827 //
3828 // We ignore static fields, because @Contended is not supported for them.
3829 // The layout code below will also ignore the static fields.
3830 int nonstatic_contended_count = 0;
3831 FieldAllocationCount fac_contended;
3832 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3833 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3834 if (fs.is_contended()) {
3835 fac_contended.count[atype]++;
3836 if (!fs.access_flags().is_static()) {
3837 nonstatic_contended_count++;
3838 }
3839 }
3840 }
3841
3842
3843 // Calculate the starting byte offsets
3844 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3845 int next_static_double_offset = next_static_oop_offset +
3846 ((fac->count[STATIC_OOP]) * heapOopSize);
3847 if (fac->count[STATIC_DOUBLE]) {
3848 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3849 }
3850
3851 int next_static_word_offset = next_static_double_offset +
3852 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3853 int next_static_short_offset = next_static_word_offset +
3854 ((fac->count[STATIC_WORD]) * BytesPerInt);
3855 int next_static_byte_offset = next_static_short_offset +
3856 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3857
3858 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3859 nonstatic_field_size * heapOopSize;
3860
3861 int next_nonstatic_field_offset = nonstatic_fields_start;
3862
3863 const bool is_contended_class = parsed_annotations->is_contended();
3864
3865 // Class is contended, pad before all the fields
3866 if (is_contended_class) {
3867 next_nonstatic_field_offset += ContendedPaddingWidth;
3868 }
3869
3870 // Compute the non-contended fields count.
3871 // The packing code below relies on these counts to determine if some field
3872 // can be squeezed into the alignment gap. Contended fields are obviously
3873 // exempt from that.
3874 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3875 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3876 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3877 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3878 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3879
3880 // Total non-static fields count, including every contended field
3881 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3882 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3883 fac->count[NONSTATIC_OOP];
3884
3885 const bool super_has_nonstatic_fields =
3886 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3887 const bool has_nonstatic_fields =
3888 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3889
3890
3891 // Prepare list of oops for oop map generation.
3892 //
3893 // "offset" and "count" lists are describing the set of contiguous oop
3894 // regions. offset[i] is the start of the i-th region, which then has
3895 // count[i] oops following. Before we know how many regions are required,
3896 // we pessimistically allocate the maps to fit all the oops into the
3897 // distinct regions.
3898 //
3899 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3900 // to figure out if we still need to do this.
3901 unsigned int nonstatic_oop_map_count = 0;
3902 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3903
3904 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3905 THREAD, int, max_nonstatic_oop_maps);
3906 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3907 THREAD, unsigned int, max_nonstatic_oop_maps);
3908
3909 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3910
3911 bool compact_fields = CompactFields;
3912 int allocation_style = FieldsAllocationStyle;
3913 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3914 assert(false, "0 <= FieldsAllocationStyle <= 2");
3915 allocation_style = 1; // Optimistic
3916 }
3917
3918 // The next classes have predefined hard-coded fields offsets
3919 // (see in JavaClasses::compute_hard_coded_offsets()).
3920 // Use default fields allocation order for them.
3921 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3922 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3923 _class_name == vmSymbols::java_lang_Class() ||
3924 _class_name == vmSymbols::java_lang_ClassLoader() ||
3925 _class_name == vmSymbols::java_lang_ref_Reference() ||
3926 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3927 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3928 _class_name == vmSymbols::java_lang_String() ||
3929 _class_name == vmSymbols::java_lang_Throwable() ||
3930 _class_name == vmSymbols::java_lang_Boolean() ||
3931 _class_name == vmSymbols::java_lang_Character() ||
3932 _class_name == vmSymbols::java_lang_Float() ||
3933 _class_name == vmSymbols::java_lang_Double() ||
3934 _class_name == vmSymbols::java_lang_Byte() ||
3935 _class_name == vmSymbols::java_lang_Short() ||
3936 _class_name == vmSymbols::java_lang_Integer() ||
3937 _class_name == vmSymbols::java_lang_Long())) {
3938 allocation_style = 0; // Allocate oops first
3939 compact_fields = false; // Don't compact fields
3940 }
3941
3942 int next_nonstatic_oop_offset = 0;
3943 int next_nonstatic_double_offset = 0;
3944
3945 // Rearrange fields for a given allocation style
3946 if( allocation_style == 0 ) {
3947 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3948 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3949 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3950 (nonstatic_oop_count * heapOopSize);
3951 } else if( allocation_style == 1 ) {
3952 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3953 next_nonstatic_double_offset = next_nonstatic_field_offset;
3954 } else if( allocation_style == 2 ) {
3955 // Fields allocation: oops fields in super and sub classes are together.
3956 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3957 _super_klass->nonstatic_oop_map_size() > 0 ) {
3958 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3959 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3960 const OopMapBlock* const last_map = first_map + map_count - 1;
3961 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3962 if (next_offset == next_nonstatic_field_offset) {
3963 allocation_style = 0; // allocate oops first
3964 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3965 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3966 (nonstatic_oop_count * heapOopSize);
3967 }
3968 }
3969 if( allocation_style == 2 ) {
3970 allocation_style = 1; // allocate oops last
3971 next_nonstatic_double_offset = next_nonstatic_field_offset;
3972 }
3973 } else {
3974 ShouldNotReachHere();
3975 }
3976
3977 int nonstatic_oop_space_count = 0;
3978 int nonstatic_word_space_count = 0;
3979 int nonstatic_short_space_count = 0;
3980 int nonstatic_byte_space_count = 0;
3981 int nonstatic_oop_space_offset = 0;
3982 int nonstatic_word_space_offset = 0;
3983 int nonstatic_short_space_offset = 0;
3984 int nonstatic_byte_space_offset = 0;
3985
3986 // Try to squeeze some of the fields into the gaps due to
3987 // long/double alignment.
3988 if (nonstatic_double_count > 0) {
3989 int offset = next_nonstatic_double_offset;
3990 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3991 if (compact_fields && offset != next_nonstatic_double_offset) {
3992 // Allocate available fields into the gap before double field.
3993 int length = next_nonstatic_double_offset - offset;
3994 assert(length == BytesPerInt, "");
3995 nonstatic_word_space_offset = offset;
3996 if (nonstatic_word_count > 0) {
3997 nonstatic_word_count -= 1;
3998 nonstatic_word_space_count = 1; // Only one will fit
3999 length -= BytesPerInt;
4000 offset += BytesPerInt;
4001 }
4002 nonstatic_short_space_offset = offset;
4003 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4004 nonstatic_short_count -= 1;
4005 nonstatic_short_space_count += 1;
4006 length -= BytesPerShort;
4007 offset += BytesPerShort;
4008 }
4009 nonstatic_byte_space_offset = offset;
4010 while (length > 0 && nonstatic_byte_count > 0) {
4011 nonstatic_byte_count -= 1;
4012 nonstatic_byte_space_count += 1;
4013 length -= 1;
4014 }
4015 // Allocate oop field in the gap if there are no other fields for that.
4016 nonstatic_oop_space_offset = offset;
4017 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4018 allocation_style != 0) { // when oop fields not first
4019 nonstatic_oop_count -= 1;
4020 nonstatic_oop_space_count = 1; // Only one will fit
4021 length -= heapOopSize;
4022 offset += heapOopSize;
4023 }
4024 }
4025 }
4026
4027 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4028 (nonstatic_double_count * BytesPerLong);
4029 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4030 (nonstatic_word_count * BytesPerInt);
4031 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4032 (nonstatic_short_count * BytesPerShort);
4033 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4034 nonstatic_byte_count;
4035
4036 // let oops jump before padding with this allocation style
4037 if( allocation_style == 1 ) {
4038 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4039 if( nonstatic_oop_count > 0 ) {
4040 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4041 }
4042 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4043 }
4044
4045 // Iterate over fields again and compute correct offsets.
4046 // The field allocation type was temporarily stored in the offset slot.
4047 // oop fields are located before non-oop fields (static and non-static).
4048 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4049
4050 // skip already laid out fields
4051 if (fs.is_offset_set()) continue;
4052
4053 // contended instance fields are handled below
4054 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4055
4056 int real_offset = 0;
4057 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4058
4059 // pack the rest of the fields
4060 switch (atype) {
4061 case STATIC_OOP:
4062 real_offset = next_static_oop_offset;
4063 next_static_oop_offset += heapOopSize;
4064 break;
4065 case STATIC_BYTE:
4066 real_offset = next_static_byte_offset;
4067 next_static_byte_offset += 1;
4068 break;
4069 case STATIC_SHORT:
4070 real_offset = next_static_short_offset;
4071 next_static_short_offset += BytesPerShort;
4072 break;
4073 case STATIC_WORD:
4074 real_offset = next_static_word_offset;
4075 next_static_word_offset += BytesPerInt;
4076 break;
4077 case STATIC_DOUBLE:
4078 real_offset = next_static_double_offset;
4079 next_static_double_offset += BytesPerLong;
4080 break;
4081 case NONSTATIC_OOP:
4082 if( nonstatic_oop_space_count > 0 ) {
4083 real_offset = nonstatic_oop_space_offset;
4084 nonstatic_oop_space_offset += heapOopSize;
4085 nonstatic_oop_space_count -= 1;
4086 } else {
4087 real_offset = next_nonstatic_oop_offset;
4088 next_nonstatic_oop_offset += heapOopSize;
4089 }
4090
4091 // Record this oop in the oop maps
4092 if( nonstatic_oop_map_count > 0 &&
4093 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4094 real_offset -
4095 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4096 heapOopSize ) {
4097 // This oop is adjacent to the previous one, add to current oop map
4098 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4099 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4100 } else {
4101 // This oop is not adjacent to the previous one, create new oop map
4102 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4103 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4104 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4105 nonstatic_oop_map_count += 1;
4106 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4107 first_nonstatic_oop_offset = real_offset;
4108 }
4109 }
4110 break;
4111 case NONSTATIC_BYTE:
4112 if( nonstatic_byte_space_count > 0 ) {
4113 real_offset = nonstatic_byte_space_offset;
4114 nonstatic_byte_space_offset += 1;
4115 nonstatic_byte_space_count -= 1;
4116 } else {
4117 real_offset = next_nonstatic_byte_offset;
4118 next_nonstatic_byte_offset += 1;
4119 }
4120 break;
4121 case NONSTATIC_SHORT:
4122 if( nonstatic_short_space_count > 0 ) {
4123 real_offset = nonstatic_short_space_offset;
4124 nonstatic_short_space_offset += BytesPerShort;
4125 nonstatic_short_space_count -= 1;
4126 } else {
4127 real_offset = next_nonstatic_short_offset;
4128 next_nonstatic_short_offset += BytesPerShort;
4129 }
4130 break;
4131 case NONSTATIC_WORD:
4132 if( nonstatic_word_space_count > 0 ) {
4133 real_offset = nonstatic_word_space_offset;
4134 nonstatic_word_space_offset += BytesPerInt;
4135 nonstatic_word_space_count -= 1;
4136 } else {
4137 real_offset = next_nonstatic_word_offset;
4138 next_nonstatic_word_offset += BytesPerInt;
4139 }
4140 break;
4141 case NONSTATIC_DOUBLE:
4142 real_offset = next_nonstatic_double_offset;
4143 next_nonstatic_double_offset += BytesPerLong;
4144 break;
4145 default:
4146 ShouldNotReachHere();
4147 }
4148 fs.set_offset(real_offset);
4149 }
4150
4151
4152 // Handle the contended cases.
4153 //
4154 // Each contended field should not intersect the cache line with another contended field.
4155 // In the absence of alignment information, we end up with pessimistically separating
4156 // the fields with full-width padding.
4157 //
4158 // Additionally, this should not break alignment for the fields, so we round the alignment up
4159 // for each field.
4160 if (nonstatic_contended_count > 0) {
4161
4162 // if there is at least one contended field, we need to have pre-padding for them
4163 next_nonstatic_padded_offset += ContendedPaddingWidth;
4164
4165 // collect all contended groups
4166 ResourceBitMap bm(cp->size());
4167 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4168 // skip already laid out fields
4169 if (fs.is_offset_set()) continue;
4170
4171 if (fs.is_contended()) {
4172 bm.set_bit(fs.contended_group());
4173 }
4174 }
4175
4176 int current_group = -1;
4177 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4178
4179 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4180
4181 // skip already laid out fields
4182 if (fs.is_offset_set()) continue;
4183
4184 // skip non-contended fields and fields from different group
4185 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4186
4187 // handle statics below
4188 if (fs.access_flags().is_static()) continue;
4189
4190 int real_offset = 0;
4191 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4192
4193 switch (atype) {
4194 case NONSTATIC_BYTE:
4195 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4196 real_offset = next_nonstatic_padded_offset;
4197 next_nonstatic_padded_offset += 1;
4198 break;
4199
4200 case NONSTATIC_SHORT:
4201 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4202 real_offset = next_nonstatic_padded_offset;
4203 next_nonstatic_padded_offset += BytesPerShort;
4204 break;
4205
4206 case NONSTATIC_WORD:
4207 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4208 real_offset = next_nonstatic_padded_offset;
4209 next_nonstatic_padded_offset += BytesPerInt;
4210 break;
4211
4212 case NONSTATIC_DOUBLE:
4213 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4214 real_offset = next_nonstatic_padded_offset;
4215 next_nonstatic_padded_offset += BytesPerLong;
4216 break;
4217
4218 case NONSTATIC_OOP:
4219 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4220 real_offset = next_nonstatic_padded_offset;
4221 next_nonstatic_padded_offset += heapOopSize;
4222
4223 // Record this oop in the oop maps
4224 if( nonstatic_oop_map_count > 0 &&
4225 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4226 real_offset -
4227 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4228 heapOopSize ) {
4229 // This oop is adjacent to the previous one, add to current oop map
4230 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4231 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4232 } else {
4233 // This oop is not adjacent to the previous one, create new oop map
4234 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4235 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4236 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4237 nonstatic_oop_map_count += 1;
4238 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4239 first_nonstatic_oop_offset = real_offset;
4240 }
4241 }
4242 break;
4243
4244 default:
4245 ShouldNotReachHere();
4246 }
4247
4248 if (fs.contended_group() == 0) {
4249 // Contended group defines the equivalence class over the fields:
4250 // the fields within the same contended group are not inter-padded.
4251 // The only exception is default group, which does not incur the
4252 // equivalence, and so requires intra-padding.
4253 next_nonstatic_padded_offset += ContendedPaddingWidth;
4254 }
4255
4256 fs.set_offset(real_offset);
4257 } // for
4258
4259 // Start laying out the next group.
4260 // Note that this will effectively pad the last group in the back;
4261 // this is expected to alleviate memory contention effects for
4262 // subclass fields and/or adjacent object.
4263 // If this was the default group, the padding is already in place.
4264 if (current_group != 0) {
4265 next_nonstatic_padded_offset += ContendedPaddingWidth;
4266 }
4267 }
4268
4269 // handle static fields
4270 }
4271
4272 // Entire class is contended, pad in the back.
4273 // This helps to alleviate memory contention effects for subclass fields
4274 // and/or adjacent object.
4275 if (is_contended_class) {
4276 next_nonstatic_padded_offset += ContendedPaddingWidth;
4277 }
4278
4279 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4280
4281 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4282 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4283 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4284
4285 int static_field_size = (static_fields_end -
4286 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4287 nonstatic_field_size = nonstatic_field_size +
4288 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4289
4290 int instance_size = align_object_size(instance_end / wordSize);
4291
4292 assert(instance_size == align_object_size(align_up(
4293 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4294 wordSize) / wordSize), "consistent layout helper value");
4295
4296 // Invariant: nonstatic_field end/start should only change if there are
4297 // nonstatic fields in the class, or if the class is contended. We compare
4298 // against the non-aligned value, so that end alignment will not fail the
4299 // assert without actually having the fields.
4300 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4301 is_contended_class ||
4302 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4303
4304 // Number of non-static oop map blocks allocated at end of klass.
4305 const unsigned int total_oop_map_count =
4306 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4307 first_nonstatic_oop_offset);
4308
4309#ifndef PRODUCT
4310 if (PrintFieldLayout) {
4311 print_field_layout(_class_name,
4312 _fields,
4313 cp,
4314 instance_size,
4315 nonstatic_fields_start,
4316 nonstatic_fields_end,
4317 static_fields_end);
4318 }
4319
4320#endif
4321 // Pass back information needed for InstanceKlass creation
4322 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4323 info->nonstatic_oop_counts = nonstatic_oop_counts;
4324 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4325 info->total_oop_map_count = total_oop_map_count;
4326 info->instance_size = instance_size;
4327 info->static_field_size = static_field_size;
4328 info->nonstatic_field_size = nonstatic_field_size;
4329 info->has_nonstatic_fields = has_nonstatic_fields;
4330}
4331
4332static void fill_oop_maps(const InstanceKlass* k,
4333 unsigned int nonstatic_oop_map_count,
4334 const int* nonstatic_oop_offsets,
4335 const unsigned int* nonstatic_oop_counts) {
4336
4337 assert(k != NULL, "invariant");
4338
4339 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4340 const InstanceKlass* const super = k->superklass();
4341 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4342 if (super_count > 0) {
4343 // Copy maps from superklass
4344 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4345 for (unsigned int i = 0; i < super_count; ++i) {
4346 *this_oop_map++ = *super_oop_map++;
4347 }
4348 }
4349
4350 if (nonstatic_oop_map_count > 0) {
4351 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4352 // The counts differ because there is no gap between superklass's last oop
4353 // field and the first local oop field. Extend the last oop map copied
4354 // from the superklass instead of creating new one.
4355 nonstatic_oop_map_count--;
4356 nonstatic_oop_offsets++;
4357 this_oop_map--;
4358 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4359 this_oop_map++;
4360 }
4361
4362 // Add new map blocks, fill them
4363 while (nonstatic_oop_map_count-- > 0) {
4364 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4365 this_oop_map->set_count(*nonstatic_oop_counts++);
4366 this_oop_map++;
4367 }
4368 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4369 this_oop_map, "sanity");
4370 }
4371}
4372
4373
4374void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4375 assert(ik != NULL, "invariant");
4376
4377 const Klass* const super = ik->super();
4378
4379 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4380 // in which case we don't have to register objects as finalizable
4381 if (!_has_empty_finalizer) {
4382 if (_has_finalizer ||
4383 (super != NULL && super->has_finalizer())) {
4384 ik->set_has_finalizer();
4385 }
4386 }
4387
4388#ifdef ASSERT
4389 bool f = false;
4390 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4391 vmSymbols::void_method_signature());
4392 if (m != NULL && !m->is_empty_method()) {
4393 f = true;
4394 }
4395
4396 // Spec doesn't prevent agent from redefinition of empty finalizer.
4397 // Despite the fact that it's generally bad idea and redefined finalizer
4398 // will not work as expected we shouldn't abort vm in this case
4399 if (!ik->has_redefined_this_or_super()) {
4400 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4401 }
4402#endif
4403
4404 // Check if this klass supports the java.lang.Cloneable interface
4405 if (SystemDictionary::Cloneable_klass_loaded()) {
4406 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4407 ik->set_is_cloneable();
4408 }
4409 }
4410
4411 // Check if this klass has a vanilla default constructor
4412 if (super == NULL) {
4413 // java.lang.Object has empty default constructor
4414 ik->set_has_vanilla_constructor();
4415 } else {
4416 if (super->has_vanilla_constructor() &&
4417 _has_vanilla_constructor) {
4418 ik->set_has_vanilla_constructor();
4419 }
4420#ifdef ASSERT
4421 bool v = false;
4422 if (super->has_vanilla_constructor()) {
4423 const Method* const constructor =
4424 ik->find_method(vmSymbols::object_initializer_name(),
4425 vmSymbols::void_method_signature());
4426 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4427 v = true;
4428 }
4429 }
4430 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4431#endif
4432 }
4433
4434 // If it cannot be fast-path allocated, set a bit in the layout helper.
4435 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4436 assert(ik->size_helper() > 0, "layout_helper is initialized");
4437 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4438 || ik->is_abstract() || ik->is_interface()
4439 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4440 || ik->size_helper() >= FastAllocateSizeLimit) {
4441 // Forbid fast-path allocation.
4442 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4443 ik->set_layout_helper(lh);
4444 }
4445}
4446
4447// utility methods for appending an array with check for duplicates
4448
4449static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4450 const Array<InstanceKlass*>* const ifs) {
4451 // iterate over new interfaces
4452 for (int i = 0; i < ifs->length(); i++) {
4453 InstanceKlass* const e = ifs->at(i);
4454 assert(e->is_klass() && e->is_interface(), "just checking");
4455 // add new interface
4456 result->append_if_missing(e);
4457 }
4458}
4459
4460static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4461 Array<InstanceKlass*>* local_ifs,
4462 ClassLoaderData* loader_data,
4463 TRAPS) {
4464 assert(local_ifs != NULL, "invariant");
4465 assert(loader_data != NULL, "invariant");
4466
4467 // Compute maximum size for transitive interfaces
4468 int max_transitive_size = 0;
4469 int super_size = 0;
4470 // Add superclass transitive interfaces size
4471 if (super != NULL) {
4472 super_size = super->transitive_interfaces()->length();
4473 max_transitive_size += super_size;
4474 }
4475 // Add local interfaces' super interfaces
4476 const int local_size = local_ifs->length();
4477 for (int i = 0; i < local_size; i++) {
4478 InstanceKlass* const l = local_ifs->at(i);
4479 max_transitive_size += l->transitive_interfaces()->length();
4480 }
4481 // Finally add local interfaces
4482 max_transitive_size += local_size;
4483 // Construct array
4484 if (max_transitive_size == 0) {
4485 // no interfaces, use canonicalized array
4486 return Universe::the_empty_instance_klass_array();
4487 } else if (max_transitive_size == super_size) {
4488 // no new local interfaces added, share superklass' transitive interface array
4489 return super->transitive_interfaces();
4490 } else if (max_transitive_size == local_size) {
4491 // only local interfaces added, share local interface array
4492 return local_ifs;
4493 } else {
4494 ResourceMark rm;
4495 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4496
4497 // Copy down from superclass
4498 if (super != NULL) {
4499 append_interfaces(result, super->transitive_interfaces());
4500 }
4501
4502 // Copy down from local interfaces' superinterfaces
4503 for (int i = 0; i < local_size; i++) {
4504 InstanceKlass* const l = local_ifs->at(i);
4505 append_interfaces(result, l->transitive_interfaces());
4506 }
4507 // Finally add local interfaces
4508 append_interfaces(result, local_ifs);
4509
4510 // length will be less than the max_transitive_size if duplicates were removed
4511 const int length = result->length();
4512 assert(length <= max_transitive_size, "just checking");
4513 Array<InstanceKlass*>* const new_result =
4514 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4515 for (int i = 0; i < length; i++) {
4516 InstanceKlass* const e = result->at(i);
4517 assert(e != NULL, "just checking");
4518 new_result->at_put(i, e);
4519 }
4520 return new_result;
4521 }
4522}
4523
4524static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4525 assert(this_klass != NULL, "invariant");
4526 const Klass* const super = this_klass->super();
4527 if (super != NULL) {
4528
4529 // If the loader is not the boot loader then throw an exception if its
4530 // superclass is in package jdk.internal.reflect and its loader is not a
4531 // special reflection class loader
4532 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4533 assert(super->is_instance_klass(), "super is not instance klass");
4534 PackageEntry* super_package = super->package();
4535 if (super_package != NULL &&
4536 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4537 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4538 ResourceMark rm(THREAD);
4539 Exceptions::fthrow(
4540 THREAD_AND_LOCATION,
4541 vmSymbols::java_lang_IllegalAccessError(),
4542 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4543 this_klass->external_name(),
4544 this_klass->class_loader_data()->loader_name_and_id(),
4545 super->external_name());
4546 return;
4547 }
4548 }
4549
4550 Reflection::VerifyClassAccessResults vca_result =
4551 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4552 if (vca_result != Reflection::ACCESS_OK) {
4553 ResourceMark rm(THREAD);
4554 char* msg = Reflection::verify_class_access_msg(this_klass,
4555 InstanceKlass::cast(super),
4556 vca_result);
4557 if (msg == NULL) {
4558 bool same_module = (this_klass->module() == super->module());
4559 Exceptions::fthrow(
4560 THREAD_AND_LOCATION,
4561 vmSymbols::java_lang_IllegalAccessError(),
4562 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4563 this_klass->external_name(),
4564 super->is_abstract() ? "abstract " : "",
4565 super->external_name(),
4566 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4567 (same_module) ? "" : "; ",
4568 (same_module) ? "" : super->class_in_module_of_loader());
4569 } else {
4570 // Add additional message content.
4571 Exceptions::fthrow(
4572 THREAD_AND_LOCATION,
4573 vmSymbols::java_lang_IllegalAccessError(),
4574 "superclass access check failed: %s",
4575 msg);
4576 }
4577 }
4578 }
4579}
4580
4581
4582static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4583 assert(this_klass != NULL, "invariant");
4584 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4585 const int lng = local_interfaces->length();
4586 for (int i = lng - 1; i >= 0; i--) {
4587 InstanceKlass* const k = local_interfaces->at(i);
4588 assert (k != NULL && k->is_interface(), "invalid interface");
4589 Reflection::VerifyClassAccessResults vca_result =
4590 Reflection::verify_class_access(this_klass, k, false);
4591 if (vca_result != Reflection::ACCESS_OK) {
4592 ResourceMark rm(THREAD);
4593 char* msg = Reflection::verify_class_access_msg(this_klass,
4594 k,
4595 vca_result);
4596 if (msg == NULL) {
4597 bool same_module = (this_klass->module() == k->module());
4598 Exceptions::fthrow(
4599 THREAD_AND_LOCATION,
4600 vmSymbols::java_lang_IllegalAccessError(),
4601 "class %s cannot access its superinterface %s (%s%s%s)",
4602 this_klass->external_name(),
4603 k->external_name(),
4604 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4605 (same_module) ? "" : "; ",
4606 (same_module) ? "" : k->class_in_module_of_loader());
4607 } else {
4608 // Add additional message content.
4609 Exceptions::fthrow(
4610 THREAD_AND_LOCATION,
4611 vmSymbols::java_lang_IllegalAccessError(),
4612 "superinterface check failed: %s",
4613 msg);
4614 }
4615 }
4616 }
4617}
4618
4619
4620static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4621 assert(this_klass != NULL, "invariant");
4622 const Array<Method*>* const methods = this_klass->methods();
4623 const int num_methods = methods->length();
4624
4625 // go thru each method and check if it overrides a final method
4626 for (int index = 0; index < num_methods; index++) {
4627 const Method* const m = methods->at(index);
4628
4629 // skip private, static, and <init> methods
4630 if ((!m->is_private() && !m->is_static()) &&
4631 (m->name() != vmSymbols::object_initializer_name())) {
4632
4633 const Symbol* const name = m->name();
4634 const Symbol* const signature = m->signature();
4635 const Klass* k = this_klass->super();
4636 const Method* super_m = NULL;
4637 while (k != NULL) {
4638 // skip supers that don't have final methods.
4639 if (k->has_final_method()) {
4640 // lookup a matching method in the super class hierarchy
4641 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4642 if (super_m == NULL) {
4643 break; // didn't find any match; get out
4644 }
4645
4646 if (super_m->is_final() && !super_m->is_static() &&
4647 !super_m->access_flags().is_private()) {
4648 // matching method in super is final, and not static or private
4649 bool can_access = Reflection::verify_member_access(this_klass,
4650 super_m->method_holder(),
4651 super_m->method_holder(),
4652 super_m->access_flags(),
4653 false, false, CHECK);
4654 if (can_access) {
4655 // this class can access super final method and therefore override
4656 ResourceMark rm(THREAD);
4657 Exceptions::fthrow(THREAD_AND_LOCATION,
4658 vmSymbols::java_lang_VerifyError(),
4659 "class %s overrides final method %s.%s%s",
4660 this_klass->external_name(),
4661 super_m->method_holder()->external_name(),
4662 name->as_C_string(),
4663 signature->as_C_string()
4664 );
4665 return;
4666 }
4667 }
4668
4669 // continue to look from super_m's holder's super.
4670 k = super_m->method_holder()->super();
4671 continue;
4672 }
4673
4674 k = k->super();
4675 }
4676 }
4677 }
4678}
4679
4680
4681// assumes that this_klass is an interface
4682static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4683 assert(this_klass != NULL, "invariant");
4684 assert(this_klass->is_interface(), "not an interface");
4685 const Array<Method*>* methods = this_klass->methods();
4686 const int num_methods = methods->length();
4687
4688 for (int index = 0; index < num_methods; index++) {
4689 const Method* const m = methods->at(index);
4690 // if m is static and not the init method, throw a verify error
4691 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4692 ResourceMark rm(THREAD);
4693 Exceptions::fthrow(
4694 THREAD_AND_LOCATION,
4695 vmSymbols::java_lang_VerifyError(),
4696 "Illegal static method %s in interface %s",
4697 m->name()->as_C_string(),
4698 this_klass->external_name()
4699 );
4700 return;
4701 }
4702 }
4703}
4704
4705// utility methods for format checking
4706
4707void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4708 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4709 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4710 if (is_module) {
4711 ResourceMark rm(THREAD);
4712 Exceptions::fthrow(
4713 THREAD_AND_LOCATION,
4714 vmSymbols::java_lang_NoClassDefFoundError(),
4715 "%s is not a class because access_flag ACC_MODULE is set",
4716 _class_name->as_C_string());
4717 return;
4718 }
4719
4720 if (!_need_verify) { return; }
4721
4722 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4723 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4724 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4725 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4726 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4727 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4728 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4729
4730 if ((is_abstract && is_final) ||
4731 (is_interface && !is_abstract) ||
4732 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4733 (!is_interface && major_gte_15 && is_annotation)) {
4734 ResourceMark rm(THREAD);
4735 Exceptions::fthrow(
4736 THREAD_AND_LOCATION,
4737 vmSymbols::java_lang_ClassFormatError(),
4738 "Illegal class modifiers in class %s: 0x%X",
4739 _class_name->as_C_string(), flags
4740 );
4741 return;
4742 }
4743}
4744
4745static bool has_illegal_visibility(jint flags) {
4746 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4747 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4748 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4749
4750 return ((is_public && is_protected) ||
4751 (is_public && is_private) ||
4752 (is_protected && is_private));
4753}
4754
4755// A legal major_version.minor_version must be one of the following:
4756//
4757// Major_version >= 45 and major_version < 56, any minor_version.
4758// Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4759// Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4760//
4761static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4762 ResourceMark rm(THREAD);
4763 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4764 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4765 Exceptions::fthrow(
4766 THREAD_AND_LOCATION,
4767 vmSymbols::java_lang_UnsupportedClassVersionError(),
4768 "%s (class file version %u.%u) was compiled with an invalid major version",
4769 class_name->as_C_string(), major, minor);
4770 return;
4771 }
4772
4773 if (major > max_version) {
4774 Exceptions::fthrow(
4775 THREAD_AND_LOCATION,
4776 vmSymbols::java_lang_UnsupportedClassVersionError(),
4777 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4778 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4779 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4780 return;
4781 }
4782
4783 if (major < JAVA_12_VERSION || minor == 0) {
4784 return;
4785 }
4786
4787 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4788 if (major != max_version) {
4789 Exceptions::fthrow(
4790 THREAD_AND_LOCATION,
4791 vmSymbols::java_lang_UnsupportedClassVersionError(),
4792 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4793 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4794 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4795 return;
4796 }
4797
4798 if (!Arguments::enable_preview()) {
4799 Exceptions::fthrow(
4800 THREAD_AND_LOCATION,
4801 vmSymbols::java_lang_UnsupportedClassVersionError(),
4802 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4803 class_name->as_C_string(), major, minor);
4804 return;
4805 }
4806
4807 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4808 Exceptions::fthrow(
4809 THREAD_AND_LOCATION,
4810 vmSymbols::java_lang_UnsupportedClassVersionError(),
4811 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4812 class_name->as_C_string(), major, minor);
4813 }
4814}
4815
4816void ClassFileParser::verify_legal_field_modifiers(jint flags,
4817 bool is_interface,
4818 TRAPS) const {
4819 if (!_need_verify) { return; }
4820
4821 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4822 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4823 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4824 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4825 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4826 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4827 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4828 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4829 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4830
4831 bool is_illegal = false;
4832
4833 if (is_interface) {
4834 if (!is_public || !is_static || !is_final || is_private ||
4835 is_protected || is_volatile || is_transient ||
4836 (major_gte_15 && is_enum)) {
4837 is_illegal = true;
4838 }
4839 } else { // not interface
4840 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4841 is_illegal = true;
4842 }
4843 }
4844
4845 if (is_illegal) {
4846 ResourceMark rm(THREAD);
4847 Exceptions::fthrow(
4848 THREAD_AND_LOCATION,
4849 vmSymbols::java_lang_ClassFormatError(),
4850 "Illegal field modifiers in class %s: 0x%X",
4851 _class_name->as_C_string(), flags);
4852 return;
4853 }
4854}
4855
4856void ClassFileParser::verify_legal_method_modifiers(jint flags,
4857 bool is_interface,
4858 const Symbol* name,
4859 TRAPS) const {
4860 if (!_need_verify) { return; }
4861
4862 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4863 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4864 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4865 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4866 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4867 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4868 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4869 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4870 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4871 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4872 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4873 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4874 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4875
4876 bool is_illegal = false;
4877
4878 if (is_interface) {
4879 if (major_gte_8) {
4880 // Class file version is JAVA_8_VERSION or later Methods of
4881 // interfaces may set any of the flags except ACC_PROTECTED,
4882 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4883 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4884 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4885 (is_native || is_protected || is_final || is_synchronized) ||
4886 // If a specific method of a class or interface has its
4887 // ACC_ABSTRACT flag set, it must not have any of its
4888 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4889 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4890 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4891 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4892 (is_abstract && (is_private || is_static || is_strict))) {
4893 is_illegal = true;
4894 }
4895 } else if (major_gte_15) {
4896 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4897 if (!is_public || is_private || is_protected || is_static || is_final ||
4898 is_synchronized || is_native || !is_abstract || is_strict) {
4899 is_illegal = true;
4900 }
4901 } else {
4902 // Class file version is pre-JAVA_1_5_VERSION
4903 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4904 is_illegal = true;
4905 }
4906 }
4907 } else { // not interface
4908 if (has_illegal_visibility(flags)) {
4909 is_illegal = true;
4910 } else {
4911 if (is_initializer) {
4912 if (is_static || is_final || is_synchronized || is_native ||
4913 is_abstract || (major_gte_15 && is_bridge)) {
4914 is_illegal = true;
4915 }
4916 } else { // not initializer
4917 if (is_abstract) {
4918 if ((is_final || is_native || is_private || is_static ||
4919 (major_gte_15 && (is_synchronized || is_strict)))) {
4920 is_illegal = true;
4921 }
4922 }
4923 }
4924 }
4925 }
4926
4927 if (is_illegal) {
4928 ResourceMark rm(THREAD);
4929 Exceptions::fthrow(
4930 THREAD_AND_LOCATION,
4931 vmSymbols::java_lang_ClassFormatError(),
4932 "Method %s in class %s has illegal modifiers: 0x%X",
4933 name->as_C_string(), _class_name->as_C_string(), flags);
4934 return;
4935 }
4936}
4937
4938void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4939 int length,
4940 TRAPS) const {
4941 assert(_need_verify, "only called when _need_verify is true");
4942 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4943 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4944 }
4945}
4946
4947// Unqualified names may not contain the characters '.', ';', '[', or '/'.
4948// In class names, '/' separates unqualified names. This is verified in this function also.
4949// Method names also may not contain the characters '<' or '>', unless <init>
4950// or <clinit>. Note that method names may not be <init> or <clinit> in this
4951// method. Because these names have been checked as special cases before
4952// calling this method in verify_legal_method_name.
4953//
4954// This method is also called from the modular system APIs in modules.cpp
4955// to verify the validity of module and package names.
4956bool ClassFileParser::verify_unqualified_name(const char* name,
4957 unsigned int length,
4958 int type) {
4959 if (length == 0) return false; // Must have at least one char.
4960 for (const char* p = name; p != name + length; p++) {
4961 switch(*p) {
4962 case '.':
4963 case ';':
4964 case '[':
4965 // do not permit '.', ';', or '['
4966 return false;
4967 case '/':
4968 // check for '//' or leading or trailing '/' which are not legal
4969 // unqualified name must not be empty
4970 if (type == ClassFileParser::LegalClass) {
4971 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4972 return false;
4973 }
4974 } else {
4975 return false; // do not permit '/' unless it's class name
4976 }
4977 break;
4978 case '<':
4979 case '>':
4980 // do not permit '<' or '>' in method names
4981 if (type == ClassFileParser::LegalMethod) {
4982 return false;
4983 }
4984 }
4985 }
4986 return true;
4987}
4988
4989// Take pointer to a UTF8 byte string (not NUL-terminated).
4990// Skip over the longest part of the string that could
4991// be taken as a fieldname. Allow '/' if slash_ok is true.
4992// Return a pointer to just past the fieldname.
4993// Return NULL if no fieldname at all was found, or in the case of slash_ok
4994// being true, we saw consecutive slashes (meaning we were looking for a
4995// qualified path but found something that was badly-formed).
4996static const char* skip_over_field_name(const char* const name,
4997 bool slash_ok,
4998 unsigned int length) {
4999 const char* p;
5000 jboolean last_is_slash = false;
5001 jboolean not_first_ch = false;
5002
5003 for (p = name; p != name + length; not_first_ch = true) {
5004 const char* old_p = p;
5005 jchar ch = *p;
5006 if (ch < 128) {
5007 p++;
5008 // quick check for ascii
5009 if ((ch >= 'a' && ch <= 'z') ||
5010 (ch >= 'A' && ch <= 'Z') ||
5011 (ch == '_' || ch == '$') ||
5012 (not_first_ch && ch >= '0' && ch <= '9')) {
5013 last_is_slash = false;
5014 continue;
5015 }
5016 if (slash_ok && ch == '/') {
5017 if (last_is_slash) {
5018 return NULL; // Don't permit consecutive slashes
5019 }
5020 last_is_slash = true;
5021 continue;
5022 }
5023 }
5024 else {
5025 jint unicode_ch;
5026 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5027 p = tmp_p;
5028 last_is_slash = false;
5029 // Check if ch is Java identifier start or is Java identifier part
5030 // 4672820: call java.lang.Character methods directly without generating separate tables.
5031 EXCEPTION_MARK;
5032 // return value
5033 JavaValue result(T_BOOLEAN);
5034 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5035 JavaCallArguments args;
5036 args.push_int(unicode_ch);
5037
5038 if (not_first_ch) {
5039 // public static boolean isJavaIdentifierPart(char ch);
5040 JavaCalls::call_static(&result,
5041 SystemDictionary::Character_klass(),
5042 vmSymbols::isJavaIdentifierPart_name(),
5043 vmSymbols::int_bool_signature(),
5044 &args,
5045 THREAD);
5046 } else {
5047 // public static boolean isJavaIdentifierStart(char ch);
5048 JavaCalls::call_static(&result,
5049 SystemDictionary::Character_klass(),
5050 vmSymbols::isJavaIdentifierStart_name(),
5051 vmSymbols::int_bool_signature(),
5052 &args,
5053 THREAD);
5054 }
5055 if (HAS_PENDING_EXCEPTION) {
5056 CLEAR_PENDING_EXCEPTION;
5057 return NULL;
5058 }
5059 if(result.get_jboolean()) {
5060 continue;
5061 }
5062 }
5063 return (not_first_ch) ? old_p : NULL;
5064 }
5065 return (not_first_ch) ? p : NULL;
5066}
5067
5068// Take pointer to a UTF8 byte string (not NUL-terminated).
5069// Skip over the longest part of the string that could
5070// be taken as a field signature. Allow "void" if void_ok.
5071// Return a pointer to just past the signature.
5072// Return NULL if no legal signature is found.
5073const char* ClassFileParser::skip_over_field_signature(const char* signature,
5074 bool void_ok,
5075 unsigned int length,
5076 TRAPS) const {
5077 unsigned int array_dim = 0;
5078 while (length > 0) {
5079 switch (signature[0]) {
5080 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5081 case JVM_SIGNATURE_BOOLEAN:
5082 case JVM_SIGNATURE_BYTE:
5083 case JVM_SIGNATURE_CHAR:
5084 case JVM_SIGNATURE_SHORT:
5085 case JVM_SIGNATURE_INT:
5086 case JVM_SIGNATURE_FLOAT:
5087 case JVM_SIGNATURE_LONG:
5088 case JVM_SIGNATURE_DOUBLE:
5089 return signature + 1;
5090 case JVM_SIGNATURE_CLASS: {
5091 if (_major_version < JAVA_1_5_VERSION) {
5092 // Skip over the class name if one is there
5093 const char* const p = skip_over_field_name(signature + 1, true, --length);
5094
5095 // The next character better be a semicolon
5096 if (p && (p - signature) > 1 && p[0] == ';') {
5097 return p + 1;
5098 }
5099 }
5100 else {
5101 // Skip leading 'L' and ignore first appearance of ';'
5102 signature++;
5103 const char* c = (const char*) memchr(signature, ';', length - 1);
5104 // Format check signature
5105 if (c != NULL) {
5106 int newlen = c - (char*) signature;
5107 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5108 if (!legal) {
5109 classfile_parse_error("Class name is empty or contains illegal character "
5110 "in descriptor in class file %s",
5111 CHECK_0);
5112 return NULL;
5113 }
5114 return signature + newlen + 1;
5115 }
5116 }
5117 return NULL;
5118 }
5119 case JVM_SIGNATURE_ARRAY:
5120 array_dim++;
5121 if (array_dim > 255) {
5122 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5123 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5124 }
5125 // The rest of what's there better be a legal signature
5126 signature++;
5127 length--;
5128 void_ok = false;
5129 break;
5130 default:
5131 return NULL;
5132 }
5133 }
5134 return NULL;
5135}
5136
5137// Checks if name is a legal class name.
5138void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5139 if (!_need_verify || _relax_verify) { return; }
5140
5141 assert(name->refcount() > 0, "symbol must be kept alive");
5142 char* bytes = (char*)name->bytes();
5143 unsigned int length = name->utf8_length();
5144 bool legal = false;
5145
5146 if (length > 0) {
5147 const char* p;
5148 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5149 p = skip_over_field_signature(bytes, false, length, CHECK);
5150 legal = (p != NULL) && ((p - bytes) == (int)length);
5151 } else if (_major_version < JAVA_1_5_VERSION) {
5152 if (bytes[0] != '<') {
5153 p = skip_over_field_name(bytes, true, length);
5154 legal = (p != NULL) && ((p - bytes) == (int)length);
5155 }
5156 } else {
5157 // 4900761: relax the constraints based on JSR202 spec
5158 // Class names may be drawn from the entire Unicode character set.
5159 // Identifiers between '/' must be unqualified names.
5160 // The utf8 string has been verified when parsing cpool entries.
5161 legal = verify_unqualified_name(bytes, length, LegalClass);
5162 }
5163 }
5164 if (!legal) {
5165 ResourceMark rm(THREAD);
5166 assert(_class_name != NULL, "invariant");
5167 Exceptions::fthrow(
5168 THREAD_AND_LOCATION,
5169 vmSymbols::java_lang_ClassFormatError(),
5170 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5171 _class_name->as_C_string()
5172 );
5173 return;
5174 }
5175}
5176
5177// Checks if name is a legal field name.
5178void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5179 if (!_need_verify || _relax_verify) { return; }
5180
5181 char* bytes = (char*)name->bytes();
5182 unsigned int length = name->utf8_length();
5183 bool legal = false;
5184
5185 if (length > 0) {
5186 if (_major_version < JAVA_1_5_VERSION) {
5187 if (bytes[0] != '<') {
5188 const char* p = skip_over_field_name(bytes, false, length);
5189 legal = (p != NULL) && ((p - bytes) == (int)length);
5190 }
5191 } else {
5192 // 4881221: relax the constraints based on JSR202 spec
5193 legal = verify_unqualified_name(bytes, length, LegalField);
5194 }
5195 }
5196
5197 if (!legal) {
5198 ResourceMark rm(THREAD);
5199 assert(_class_name != NULL, "invariant");
5200 Exceptions::fthrow(
5201 THREAD_AND_LOCATION,
5202 vmSymbols::java_lang_ClassFormatError(),
5203 "Illegal field name \"%.*s\" in class %s", length, bytes,
5204 _class_name->as_C_string()
5205 );
5206 return;
5207 }
5208}
5209
5210// Checks if name is a legal method name.
5211void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5212 if (!_need_verify || _relax_verify) { return; }
5213
5214 assert(name != NULL, "method name is null");
5215 char* bytes = (char*)name->bytes();
5216 unsigned int length = name->utf8_length();
5217 bool legal = false;
5218
5219 if (length > 0) {
5220 if (bytes[0] == '<') {
5221 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5222 legal = true;
5223 }
5224 } else if (_major_version < JAVA_1_5_VERSION) {
5225 const char* p;
5226 p = skip_over_field_name(bytes, false, length);
5227 legal = (p != NULL) && ((p - bytes) == (int)length);
5228 } else {
5229 // 4881221: relax the constraints based on JSR202 spec
5230 legal = verify_unqualified_name(bytes, length, LegalMethod);
5231 }
5232 }
5233
5234 if (!legal) {
5235 ResourceMark rm(THREAD);
5236 assert(_class_name != NULL, "invariant");
5237 Exceptions::fthrow(
5238 THREAD_AND_LOCATION,
5239 vmSymbols::java_lang_ClassFormatError(),
5240 "Illegal method name \"%.*s\" in class %s", length, bytes,
5241 _class_name->as_C_string()
5242 );
5243 return;
5244 }
5245}
5246
5247
5248// Checks if signature is a legal field signature.
5249void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5250 const Symbol* signature,
5251 TRAPS) const {
5252 if (!_need_verify) { return; }
5253
5254 const char* const bytes = (const char* const)signature->bytes();
5255 const unsigned int length = signature->utf8_length();
5256 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5257
5258 if (p == NULL || (p - bytes) != (int)length) {
5259 throwIllegalSignature("Field", name, signature, CHECK);
5260 }
5261}
5262
5263// Checks if signature is a legal method signature.
5264// Returns number of parameters
5265int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5266 const Symbol* signature,
5267 TRAPS) const {
5268 if (!_need_verify) {
5269 // make sure caller's args_size will be less than 0 even for non-static
5270 // method so it will be recomputed in compute_size_of_parameters().
5271 return -2;
5272 }
5273
5274 // Class initializers cannot have args for class format version >= 51.
5275 if (name == vmSymbols::class_initializer_name() &&
5276 signature != vmSymbols::void_method_signature() &&
5277 _major_version >= JAVA_7_VERSION) {
5278 throwIllegalSignature("Method", name, signature, CHECK_0);
5279 return 0;
5280 }
5281
5282 unsigned int args_size = 0;
5283 const char* p = (const char*)signature->bytes();
5284 unsigned int length = signature->utf8_length();
5285 const char* nextp;
5286
5287 // The first character must be a '('
5288 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5289 length--;
5290 // Skip over legal field signatures
5291 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5292 while ((length > 0) && (nextp != NULL)) {
5293 args_size++;
5294 if (p[0] == 'J' || p[0] == 'D') {
5295 args_size++;
5296 }
5297 length -= nextp - p;
5298 p = nextp;
5299 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5300 }
5301 // The first non-signature thing better be a ')'
5302 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5303 length--;
5304 if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5305 // All internal methods must return void
5306 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5307 return args_size;
5308 }
5309 } else {
5310 // Now we better just have a return value
5311 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5312 if (nextp && ((int)length == (nextp - p))) {
5313 return args_size;
5314 }
5315 }
5316 }
5317 }
5318 // Report error
5319 throwIllegalSignature("Method", name, signature, CHECK_0);
5320 return 0;
5321}
5322
5323int ClassFileParser::static_field_size() const {
5324 assert(_field_info != NULL, "invariant");
5325 return _field_info->static_field_size;
5326}
5327
5328int ClassFileParser::total_oop_map_count() const {
5329 assert(_field_info != NULL, "invariant");
5330 return _field_info->total_oop_map_count;
5331}
5332
5333jint ClassFileParser::layout_size() const {
5334 assert(_field_info != NULL, "invariant");
5335 return _field_info->instance_size;
5336}
5337
5338static void check_methods_for_intrinsics(const InstanceKlass* ik,
5339 const Array<Method*>* methods) {
5340 assert(ik != NULL, "invariant");
5341 assert(methods != NULL, "invariant");
5342
5343 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5344 // (We used to do this lazily, but now we query it in Rewriter,
5345 // which is eagerly done for every method, so we might as well do it now,
5346 // when everything is fresh in memory.)
5347 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5348
5349 if (klass_id != vmSymbols::NO_SID) {
5350 for (int j = 0; j < methods->length(); ++j) {
5351 Method* method = methods->at(j);
5352 method->init_intrinsic_id();
5353
5354 if (CheckIntrinsics) {
5355 // Check if an intrinsic is defined for method 'method',
5356 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5357 if (method->intrinsic_id() != vmIntrinsics::_none &&
5358 !method->intrinsic_candidate()) {
5359 tty->print("Compiler intrinsic is defined for method [%s], "
5360 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5361 method->name_and_sig_as_C_string(),
5362 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5363 );
5364 tty->cr();
5365 DEBUG_ONLY(vm_exit(1));
5366 }
5367 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5368 // but there is no intrinsic available for it.
5369 if (method->intrinsic_candidate() &&
5370 method->intrinsic_id() == vmIntrinsics::_none) {
5371 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5372 "but no compiler intrinsic is defined for the method.%s",
5373 method->name_and_sig_as_C_string(),
5374 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5375 );
5376 tty->cr();
5377 DEBUG_ONLY(vm_exit(1));
5378 }
5379 }
5380 } // end for
5381
5382#ifdef ASSERT
5383 if (CheckIntrinsics) {
5384 // Check for orphan methods in the current class. A method m
5385 // of a class C is orphan if an intrinsic is defined for method m,
5386 // but class C does not declare m.
5387 // The check is potentially expensive, therefore it is available
5388 // only in debug builds.
5389
5390 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5391 if (vmIntrinsics::_compiledLambdaForm == id) {
5392 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5393 // generated for the JVM from a LambdaForm and therefore no method
5394 // is defined for it.
5395 continue;
5396 }
5397
5398 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5399 // Check if the current class contains a method with the same
5400 // name, flags, signature.
5401 bool match = false;
5402 for (int j = 0; j < methods->length(); ++j) {
5403 const Method* method = methods->at(j);
5404 if (method->intrinsic_id() == id) {
5405 match = true;
5406 break;
5407 }
5408 }
5409
5410 if (!match) {
5411 char buf[1000];
5412 tty->print("Compiler intrinsic is defined for method [%s], "
5413 "but the method is not available in class [%s].%s",
5414 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5415 buf, sizeof(buf)),
5416 ik->name()->as_C_string(),
5417 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5418 );
5419 tty->cr();
5420 DEBUG_ONLY(vm_exit(1));
5421 }
5422 }
5423 } // end for
5424 } // CheckIntrinsics
5425#endif // ASSERT
5426 }
5427}
5428
5429InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5430 if (_klass != NULL) {
5431 return _klass;
5432 }
5433
5434 InstanceKlass* const ik =
5435 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5436
5437 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5438
5439 assert(_klass == ik, "invariant");
5440
5441
5442 if (ik->should_store_fingerprint()) {
5443 ik->store_fingerprint(_stream->compute_fingerprint());
5444 }
5445
5446 ik->set_has_passed_fingerprint_check(false);
5447 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5448 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5449 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5450 if (aot_fp != 0 && aot_fp == fp) {
5451 // This class matches with a class saved in an AOT library
5452 ik->set_has_passed_fingerprint_check(true);
5453 } else {
5454 ResourceMark rm;
5455 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5456 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5457 }
5458 }
5459
5460 return ik;
5461}
5462
5463void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5464 assert(ik != NULL, "invariant");
5465
5466 // Set name and CLD before adding to CLD
5467 ik->set_class_loader_data(_loader_data);
5468 ik->set_name(_class_name);
5469
5470 // Add all classes to our internal class loader list here,
5471 // including classes in the bootstrap (NULL) class loader.
5472 const bool publicize = !is_internal();
5473
5474 _loader_data->add_class(ik, publicize);
5475
5476 set_klass_to_deallocate(ik);
5477
5478 assert(_field_info != NULL, "invariant");
5479 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5480 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5481 "sanity");
5482
5483 assert(ik->is_instance_klass(), "sanity");
5484 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5485
5486 // Fill in information already parsed
5487 ik->set_should_verify_class(_need_verify);
5488
5489 // Not yet: supers are done below to support the new subtype-checking fields
5490 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5491 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5492 assert(_fac != NULL, "invariant");
5493 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5494
5495 // this transfers ownership of a lot of arrays from
5496 // the parser onto the InstanceKlass*
5497 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5498
5499 // note that is not safe to use the fields in the parser from this point on
5500 assert(NULL == _cp, "invariant");
5501 assert(NULL == _fields, "invariant");
5502 assert(NULL == _methods, "invariant");
5503 assert(NULL == _inner_classes, "invariant");
5504 assert(NULL == _nest_members, "invariant");
5505 assert(NULL == _local_interfaces, "invariant");
5506 assert(NULL == _combined_annotations, "invariant");
5507
5508 if (_has_final_method) {
5509 ik->set_has_final_method();
5510 }
5511
5512 ik->copy_method_ordering(_method_ordering, CHECK);
5513 // The InstanceKlass::_methods_jmethod_ids cache
5514 // is managed on the assumption that the initial cache
5515 // size is equal to the number of methods in the class. If
5516 // that changes, then InstanceKlass::idnum_can_increment()
5517 // has to be changed accordingly.
5518 ik->set_initial_method_idnum(ik->methods()->length());
5519
5520 ik->set_this_class_index(_this_class_index);
5521
5522 if (is_unsafe_anonymous()) {
5523 // _this_class_index is a CONSTANT_Class entry that refers to this
5524 // anonymous class itself. If this class needs to refer to its own methods or
5525 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5526 // _this_class_index. However, because this class is anonymous (it's
5527 // not stored in SystemDictionary), _this_class_index cannot be resolved
5528 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5529 // Therefore, we must eagerly resolve _this_class_index now.
5530 ik->constants()->klass_at_put(_this_class_index, ik);
5531 }
5532
5533 ik->set_minor_version(_minor_version);
5534 ik->set_major_version(_major_version);
5535 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5536 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5537
5538 if (_unsafe_anonymous_host != NULL) {
5539 assert (ik->is_unsafe_anonymous(), "should be the same");
5540 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5541 }
5542
5543 // Set PackageEntry for this_klass
5544 oop cl = ik->class_loader();
5545 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5546 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5547 ik->set_package(cld, CHECK);
5548
5549 const Array<Method*>* const methods = ik->methods();
5550 assert(methods != NULL, "invariant");
5551 const int methods_len = methods->length();
5552
5553 check_methods_for_intrinsics(ik, methods);
5554
5555 // Fill in field values obtained by parse_classfile_attributes
5556 if (_parsed_annotations->has_any_annotations()) {
5557 _parsed_annotations->apply_to(ik);
5558 }
5559
5560 apply_parsed_class_attributes(ik);
5561
5562 // Miranda methods
5563 if ((_num_miranda_methods > 0) ||
5564 // if this class introduced new miranda methods or
5565 (_super_klass != NULL && _super_klass->has_miranda_methods())
5566 // super class exists and this class inherited miranda methods
5567 ) {
5568 ik->set_has_miranda_methods(); // then set a flag
5569 }
5570
5571 // Fill in information needed to compute superclasses.
5572 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5573 ik->set_transitive_interfaces(_transitive_interfaces);
5574 _transitive_interfaces = NULL;
5575
5576 // Initialize itable offset tables
5577 klassItable::setup_itable_offset_table(ik);
5578
5579 // Compute transitive closure of interfaces this class implements
5580 // Do final class setup
5581 fill_oop_maps(ik,
5582 _field_info->nonstatic_oop_map_count,
5583 _field_info->nonstatic_oop_offsets,
5584 _field_info->nonstatic_oop_counts);
5585
5586 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5587 set_precomputed_flags(ik);
5588
5589 // check if this class can access its super class
5590 check_super_class_access(ik, CHECK);
5591
5592 // check if this class can access its superinterfaces
5593 check_super_interface_access(ik, CHECK);
5594
5595 // check if this class overrides any final method
5596 check_final_method_override(ik, CHECK);
5597
5598 // reject static interface methods prior to Java 8
5599 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5600 check_illegal_static_method(ik, CHECK);
5601 }
5602
5603 // Obtain this_klass' module entry
5604 ModuleEntry* module_entry = ik->module();
5605 assert(module_entry != NULL, "module_entry should always be set");
5606
5607 // Obtain java.lang.Module
5608 Handle module_handle(THREAD, module_entry->module());
5609
5610 // Allocate mirror and initialize static fields
5611 // The create_mirror() call will also call compute_modifiers()
5612 java_lang_Class::create_mirror(ik,
5613 Handle(THREAD, _loader_data->class_loader()),
5614 module_handle,
5615 _protection_domain,
5616 CHECK);
5617
5618 assert(_all_mirandas != NULL, "invariant");
5619
5620 // Generate any default methods - default methods are public interface methods
5621 // that have a default implementation. This is new with Java 8.
5622 if (_has_nonstatic_concrete_methods) {
5623 DefaultMethods::generate_default_methods(ik,
5624 _all_mirandas,
5625 CHECK);
5626 }
5627
5628 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5629 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5630 !module_entry->has_default_read_edges()) {
5631 if (!module_entry->set_has_default_read_edges()) {
5632 // We won a potential race
5633 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5634 }
5635 }
5636
5637 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5638
5639 if (!is_internal()) {
5640 if (log_is_enabled(Info, class, load)) {
5641 ResourceMark rm;
5642 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5643 ik->print_class_load_logging(_loader_data, module_name, _stream);
5644 }
5645
5646 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5647 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5648 log_is_enabled(Info, class, preview)) {
5649 ResourceMark rm;
5650 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5651 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5652 }
5653
5654 if (log_is_enabled(Debug, class, resolve)) {
5655 ResourceMark rm;
5656 // print out the superclass.
5657 const char * from = ik->external_name();
5658 if (ik->java_super() != NULL) {
5659 log_debug(class, resolve)("%s %s (super)",
5660 from,
5661 ik->java_super()->external_name());
5662 }
5663 // print out each of the interface classes referred to by this class.
5664 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5665 if (local_interfaces != NULL) {
5666 const int length = local_interfaces->length();
5667 for (int i = 0; i < length; i++) {
5668 const InstanceKlass* const k = local_interfaces->at(i);
5669 const char * to = k->external_name();
5670 log_debug(class, resolve)("%s %s (interface)", from, to);
5671 }
5672 }
5673 }
5674 }
5675
5676 JFR_ONLY(INIT_ID(ik);)
5677
5678 // If we reach here, all is well.
5679 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5680 // in order for it to not be destroyed in the ClassFileParser destructor.
5681 set_klass_to_deallocate(NULL);
5682
5683 // it's official
5684 set_klass(ik);
5685
5686 debug_only(ik->verify();)
5687}
5688
5689void ClassFileParser::update_class_name(Symbol* new_class_name) {
5690 // Decrement the refcount in the old name, since we're clobbering it.
5691 _class_name->decrement_refcount();
5692
5693 _class_name = new_class_name;
5694 // Increment the refcount of the new name.
5695 // Now the ClassFileParser owns this name and will decrement in
5696 // the destructor.
5697 _class_name->increment_refcount();
5698}
5699
5700
5701// For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5702// package by prepending its host class's package name to its class name and setting
5703// its _class_name field.
5704void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5705 ResourceMark rm(THREAD);
5706 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5707 "Unsafe anonymous class should not be in a package");
5708 const char* host_pkg_name =
5709 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5710
5711 if (host_pkg_name != NULL) {
5712 int host_pkg_len = (int)strlen(host_pkg_name);
5713 int class_name_len = _class_name->utf8_length();
5714 int symbol_len = host_pkg_len + 1 + class_name_len;
5715 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5716 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5717 host_pkg_name, class_name_len, _class_name->base());
5718 assert(n == symbol_len, "Unexpected number of characters in string");
5719
5720 // Decrement old _class_name to avoid leaking.
5721 _class_name->decrement_refcount();
5722
5723 // Create a symbol and update the anonymous class name.
5724 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5725 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5726 // when the class is unloaded.
5727 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5728 }
5729}
5730
5731// If the host class and the anonymous class are in the same package then do
5732// nothing. If the anonymous class is in the unnamed package then move it to its
5733// host's package. If the classes are in different packages then throw an IAE
5734// exception.
5735void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5736 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5737
5738 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5739 _class_name->utf8_length(), '/');
5740 if (anon_last_slash == NULL) { // Unnamed package
5741 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5742 } else {
5743 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5744 ResourceMark rm(THREAD);
5745 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5746 err_msg("Host class %s and anonymous class %s are in different packages",
5747 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5748 }
5749 }
5750}
5751
5752static bool relax_format_check_for(ClassLoaderData* loader_data) {
5753 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5754 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5755 bool need_verify =
5756 // verifyAll
5757 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5758 // verifyRemote
5759 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5760 return !need_verify;
5761}
5762
5763ClassFileParser::ClassFileParser(ClassFileStream* stream,
5764 Symbol* name,
5765 ClassLoaderData* loader_data,
5766 Handle protection_domain,
5767 const InstanceKlass* unsafe_anonymous_host,
5768 GrowableArray<Handle>* cp_patches,
5769 Publicity pub_level,
5770 TRAPS) :
5771 _stream(stream),
5772 _requested_name(name),
5773 _class_name(NULL),
5774 _loader_data(loader_data),
5775 _unsafe_anonymous_host(unsafe_anonymous_host),
5776 _cp_patches(cp_patches),
5777 _num_patched_klasses(0),
5778 _max_num_patched_klasses(0),
5779 _orig_cp_size(0),
5780 _first_patched_klass_resolved_index(0),
5781 _super_klass(),
5782 _cp(NULL),
5783 _fields(NULL),
5784 _methods(NULL),
5785 _inner_classes(NULL),
5786 _nest_members(NULL),
5787 _nest_host(0),
5788 _local_interfaces(NULL),
5789 _transitive_interfaces(NULL),
5790 _combined_annotations(NULL),
5791 _annotations(NULL),
5792 _type_annotations(NULL),
5793 _fields_annotations(NULL),
5794 _fields_type_annotations(NULL),
5795 _klass(NULL),
5796 _klass_to_deallocate(NULL),
5797 _parsed_annotations(NULL),
5798 _fac(NULL),
5799 _field_info(NULL),
5800 _method_ordering(NULL),
5801 _all_mirandas(NULL),
5802 _vtable_size(0),
5803 _itable_size(0),
5804 _num_miranda_methods(0),
5805 _rt(REF_NONE),
5806 _protection_domain(protection_domain),
5807 _access_flags(),
5808 _pub_level(pub_level),
5809 _bad_constant_seen(0),
5810 _synthetic_flag(false),
5811 _sde_length(false),
5812 _sde_buffer(NULL),
5813 _sourcefile_index(0),
5814 _generic_signature_index(0),
5815 _major_version(0),
5816 _minor_version(0),
5817 _this_class_index(0),
5818 _super_class_index(0),
5819 _itfs_len(0),
5820 _java_fields_count(0),
5821 _need_verify(false),
5822 _relax_verify(false),
5823 _has_nonstatic_concrete_methods(false),
5824 _declares_nonstatic_concrete_methods(false),
5825 _has_final_method(false),
5826 _has_finalizer(false),
5827 _has_empty_finalizer(false),
5828 _has_vanilla_constructor(false),
5829 _max_bootstrap_specifier_index(-1) {
5830
5831 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5832 _class_name->increment_refcount();
5833
5834 assert(THREAD->is_Java_thread(), "invariant");
5835 assert(_loader_data != NULL, "invariant");
5836 assert(stream != NULL, "invariant");
5837 assert(_stream != NULL, "invariant");
5838 assert(_stream->buffer() == _stream->current(), "invariant");
5839 assert(_class_name != NULL, "invariant");
5840 assert(0 == _access_flags.as_int(), "invariant");
5841
5842 // Figure out whether we can skip format checking (matching classic VM behavior)
5843 if (DumpSharedSpaces) {
5844 // verify == true means it's a 'remote' class (i.e., non-boot class)
5845 // Verification decision is based on BytecodeVerificationRemote flag
5846 // for those classes.
5847 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5848 BytecodeVerificationLocal;
5849 }
5850 else {
5851 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5852 stream->need_verify());
5853 }
5854 if (_cp_patches != NULL) {
5855 int len = _cp_patches->length();
5856 for (int i=0; i<len; i++) {
5857 if (has_cp_patch_at(i)) {
5858 Handle patch = cp_patch_at(i);
5859 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5860 // We need to append the names of the patched classes to the end of the constant pool,
5861 // because a patched class may have a Utf8 name that's not already included in the
5862 // original constant pool. These class names are used when patch_constant_pool()
5863 // calls patch_class().
5864 //
5865 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5866 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5867 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5868 _max_num_patched_klasses++;
5869 }
5870 }
5871 }
5872 }
5873
5874 // synch back verification state to stream
5875 stream->set_verify(_need_verify);
5876
5877 // Check if verification needs to be relaxed for this class file
5878 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5879 _relax_verify = relax_format_check_for(_loader_data);
5880
5881 parse_stream(stream, CHECK);
5882
5883 post_process_parsed_stream(stream, _cp, CHECK);
5884}
5885
5886void ClassFileParser::clear_class_metadata() {
5887 // metadata created before the instance klass is created. Must be
5888 // deallocated if classfile parsing returns an error.
5889 _cp = NULL;
5890 _fields = NULL;
5891 _methods = NULL;
5892 _inner_classes = NULL;
5893 _nest_members = NULL;
5894 _local_interfaces = NULL;
5895 _combined_annotations = NULL;
5896 _annotations = _type_annotations = NULL;
5897 _fields_annotations = _fields_type_annotations = NULL;
5898}
5899
5900// Destructor to clean up
5901ClassFileParser::~ClassFileParser() {
5902 _class_name->decrement_refcount();
5903
5904 if (_cp != NULL) {
5905 MetadataFactory::free_metadata(_loader_data, _cp);
5906 }
5907 if (_fields != NULL) {
5908 MetadataFactory::free_array<u2>(_loader_data, _fields);
5909 }
5910
5911 if (_methods != NULL) {
5912 // Free methods
5913 InstanceKlass::deallocate_methods(_loader_data, _methods);
5914 }
5915
5916 // beware of the Universe::empty_blah_array!!
5917 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5918 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5919 }
5920
5921 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5922 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5923 }
5924
5925 // Free interfaces
5926 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5927 _local_interfaces, _transitive_interfaces);
5928
5929 if (_combined_annotations != NULL) {
5930 // After all annotations arrays have been created, they are installed into the
5931 // Annotations object that will be assigned to the InstanceKlass being created.
5932
5933 // Deallocate the Annotations object and the installed annotations arrays.
5934 _combined_annotations->deallocate_contents(_loader_data);
5935
5936 // If the _combined_annotations pointer is non-NULL,
5937 // then the other annotations fields should have been cleared.
5938 assert(_annotations == NULL, "Should have been cleared");
5939 assert(_type_annotations == NULL, "Should have been cleared");
5940 assert(_fields_annotations == NULL, "Should have been cleared");
5941 assert(_fields_type_annotations == NULL, "Should have been cleared");
5942 } else {
5943 // If the annotations arrays were not installed into the Annotations object,
5944 // then they have to be deallocated explicitly.
5945 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5946 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5947 Annotations::free_contents(_loader_data, _fields_annotations);
5948 Annotations::free_contents(_loader_data, _fields_type_annotations);
5949 }
5950
5951 clear_class_metadata();
5952 _transitive_interfaces = NULL;
5953
5954 // deallocate the klass if already created. Don't directly deallocate, but add
5955 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5956 // at a safepoint.
5957 if (_klass_to_deallocate != NULL) {
5958 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5959 }
5960}
5961
5962void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5963 TRAPS) {
5964
5965 assert(stream != NULL, "invariant");
5966 assert(_class_name != NULL, "invariant");
5967
5968 // BEGIN STREAM PARSING
5969 stream->guarantee_more(8, CHECK); // magic, major, minor
5970 // Magic value
5971 const u4 magic = stream->get_u4_fast();
5972 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5973 "Incompatible magic value %u in class file %s",
5974 magic, CHECK);
5975
5976 // Version numbers
5977 _minor_version = stream->get_u2_fast();
5978 _major_version = stream->get_u2_fast();
5979
5980 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
5981 ResourceMark rm;
5982 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
5983 _major_version, _minor_version, _class_name->as_C_string());
5984 Exceptions::fthrow(
5985 THREAD_AND_LOCATION,
5986 vmSymbols::java_lang_UnsupportedClassVersionError(),
5987 "Unsupported major.minor version for dump time %u.%u",
5988 _major_version,
5989 _minor_version);
5990 }
5991
5992 // Check version numbers - we check this even with verifier off
5993 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5994
5995 stream->guarantee_more(3, CHECK); // length, first cp tag
5996 u2 cp_size = stream->get_u2_fast();
5997
5998 guarantee_property(
5999 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6000 cp_size, CHECK);
6001
6002 _orig_cp_size = cp_size;
6003 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6004 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6005 }
6006 cp_size += _max_num_patched_klasses;
6007
6008 _cp = ConstantPool::allocate(_loader_data,
6009 cp_size,
6010 CHECK);
6011
6012 ConstantPool* const cp = _cp;
6013
6014 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6015
6016 assert(cp_size == (const u2)cp->length(), "invariant");
6017
6018 // ACCESS FLAGS
6019 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6020
6021 // Access flags
6022 jint flags;
6023 // JVM_ACC_MODULE is defined in JDK-9 and later.
6024 if (_major_version >= JAVA_9_VERSION) {
6025 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6026 } else {
6027 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6028 }
6029
6030 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6031 // Set abstract bit for old class files for backward compatibility
6032 flags |= JVM_ACC_ABSTRACT;
6033 }
6034
6035 verify_legal_class_modifiers(flags, CHECK);
6036
6037 short bad_constant = class_bad_constant_seen();
6038 if (bad_constant != 0) {
6039 // Do not throw CFE until after the access_flags are checked because if
6040 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6041 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6042 }
6043
6044 _access_flags.set_flags(flags);
6045
6046 // This class and superclass
6047 _this_class_index = stream->get_u2_fast();
6048 check_property(
6049 valid_cp_range(_this_class_index, cp_size) &&
6050 cp->tag_at(_this_class_index).is_unresolved_klass(),
6051 "Invalid this class index %u in constant pool in class file %s",
6052 _this_class_index, CHECK);
6053
6054 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6055 assert(class_name_in_cp != NULL, "class_name can't be null");
6056
6057 // Update _class_name to reflect the name in the constant pool
6058 update_class_name(class_name_in_cp);
6059
6060 // Don't need to check whether this class name is legal or not.
6061 // It has been checked when constant pool is parsed.
6062 // However, make sure it is not an array type.
6063 if (_need_verify) {
6064 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6065 "Bad class name in class file %s",
6066 CHECK);
6067 }
6068
6069 // Checks if name in class file matches requested name
6070 if (_requested_name != NULL && _requested_name != _class_name) {
6071 ResourceMark rm(THREAD);
6072 Exceptions::fthrow(
6073 THREAD_AND_LOCATION,
6074 vmSymbols::java_lang_NoClassDefFoundError(),
6075 "%s (wrong name: %s)",
6076 _class_name->as_C_string(),
6077 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6078 );
6079 return;
6080 }
6081
6082 // if this is an anonymous class fix up its name if it's in the unnamed
6083 // package. Otherwise, throw IAE if it is in a different package than
6084 // its host class.
6085 if (_unsafe_anonymous_host != NULL) {
6086 fix_unsafe_anonymous_class_name(CHECK);
6087 }
6088
6089 // Verification prevents us from creating names with dots in them, this
6090 // asserts that that's the case.
6091 assert(is_internal_format(_class_name), "external class name format used internally");
6092
6093 if (!is_internal()) {
6094 LogTarget(Debug, class, preorder) lt;
6095 if (lt.is_enabled()){
6096 ResourceMark rm(THREAD);
6097 LogStream ls(lt);
6098 ls.print("%s", _class_name->as_klass_external_name());
6099 if (stream->source() != NULL) {
6100 ls.print(" source: %s", stream->source());
6101 }
6102 ls.cr();
6103 }
6104
6105#if INCLUDE_CDS
6106 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6107 if (!ClassLoader::has_jrt_entry()) {
6108 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6109 DumpLoadedClassList = NULL;
6110 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6111 _unsafe_anonymous_host == NULL) {
6112 // Only dump the classes that can be stored into CDS archive.
6113 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6114 oop class_loader = _loader_data->class_loader();
6115 ResourceMark rm(THREAD);
6116 bool skip = false;
6117 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6118 // For the boot and platform class loaders, skip classes that are not found in the
6119 // java runtime image, such as those found in the --patch-module entries.
6120 // These classes can't be loaded from the archive during runtime.
6121 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6122 skip = true;
6123 }
6124
6125 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6126 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6127 // as they can be loaded from the archive during runtime.
6128 skip = false;
6129 }
6130 }
6131 if (skip) {
6132 tty->print_cr("skip writing class %s from source %s to classlist file",
6133 _class_name->as_C_string(), stream->source());
6134 } else {
6135 classlist_file->print_cr("%s", _class_name->as_C_string());
6136 classlist_file->flush();
6137 }
6138 }
6139 }
6140#endif
6141 }
6142
6143 // SUPERKLASS
6144 _super_class_index = stream->get_u2_fast();
6145 _super_klass = parse_super_class(cp,
6146 _super_class_index,
6147 _need_verify,
6148 CHECK);
6149
6150 // Interfaces
6151 _itfs_len = stream->get_u2_fast();
6152 parse_interfaces(stream,
6153 _itfs_len,
6154 cp,
6155 &_has_nonstatic_concrete_methods,
6156 CHECK);
6157
6158 assert(_local_interfaces != NULL, "invariant");
6159
6160 // Fields (offsets are filled in later)
6161 _fac = new FieldAllocationCount();
6162 parse_fields(stream,
6163 _access_flags.is_interface(),
6164 _fac,
6165 cp,
6166 cp_size,
6167 &_java_fields_count,
6168 CHECK);
6169
6170 assert(_fields != NULL, "invariant");
6171
6172 // Methods
6173 AccessFlags promoted_flags;
6174 parse_methods(stream,
6175 _access_flags.is_interface(),
6176 &promoted_flags,
6177 &_has_final_method,
6178 &_declares_nonstatic_concrete_methods,
6179 CHECK);
6180
6181 assert(_methods != NULL, "invariant");
6182
6183 // promote flags from parse_methods() to the klass' flags
6184 _access_flags.add_promoted_flags(promoted_flags.as_int());
6185
6186 if (_declares_nonstatic_concrete_methods) {
6187 _has_nonstatic_concrete_methods = true;
6188 }
6189
6190 // Additional attributes/annotations
6191 _parsed_annotations = new ClassAnnotationCollector();
6192 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6193
6194 assert(_inner_classes != NULL, "invariant");
6195
6196 // Finalize the Annotations metadata object,
6197 // now that all annotation arrays have been created.
6198 create_combined_annotations(CHECK);
6199
6200 // Make sure this is the end of class file stream
6201 guarantee_property(stream->at_eos(),
6202 "Extra bytes at the end of class file %s",
6203 CHECK);
6204
6205 // all bytes in stream read and parsed
6206}
6207
6208void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6209 ConstantPool* cp,
6210 TRAPS) {
6211 assert(stream != NULL, "invariant");
6212 assert(stream->at_eos(), "invariant");
6213 assert(cp != NULL, "invariant");
6214 assert(_loader_data != NULL, "invariant");
6215
6216 if (_class_name == vmSymbols::java_lang_Object()) {
6217 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6218 "java.lang.Object cannot implement an interface in class file %s",
6219 CHECK);
6220 }
6221 // We check super class after class file is parsed and format is checked
6222 if (_super_class_index > 0 && NULL ==_super_klass) {
6223 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6224 if (_access_flags.is_interface()) {
6225 // Before attempting to resolve the superclass, check for class format
6226 // errors not checked yet.
6227 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6228 "Interfaces must have java.lang.Object as superclass in class file %s",
6229 CHECK);
6230 }
6231 Handle loader(THREAD, _loader_data->class_loader());
6232 _super_klass = (const InstanceKlass*)
6233 SystemDictionary::resolve_super_or_fail(_class_name,
6234 super_class_name,
6235 loader,
6236 _protection_domain,
6237 true,
6238 CHECK);
6239 }
6240
6241 if (_super_klass != NULL) {
6242 if (_super_klass->has_nonstatic_concrete_methods()) {
6243 _has_nonstatic_concrete_methods = true;
6244 }
6245
6246 if (_super_klass->is_interface()) {
6247 ResourceMark rm(THREAD);
6248 Exceptions::fthrow(
6249 THREAD_AND_LOCATION,
6250 vmSymbols::java_lang_IncompatibleClassChangeError(),
6251 "class %s has interface %s as super class",
6252 _class_name->as_klass_external_name(),
6253 _super_klass->external_name()
6254 );
6255 return;
6256 }
6257 // Make sure super class is not final
6258 if (_super_klass->is_final()) {
6259 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6260 }
6261 }
6262
6263 // Compute the transitive list of all unique interfaces implemented by this class
6264 _transitive_interfaces =
6265 compute_transitive_interfaces(_super_klass,
6266 _local_interfaces,
6267 _loader_data,
6268 CHECK);
6269
6270 assert(_transitive_interfaces != NULL, "invariant");
6271
6272 // sort methods
6273 _method_ordering = sort_methods(_methods);
6274
6275 _all_mirandas = new GrowableArray<Method*>(20);
6276
6277 Handle loader(THREAD, _loader_data->class_loader());
6278 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6279 &_num_miranda_methods,
6280 _all_mirandas,
6281 _super_klass,
6282 _methods,
6283 _access_flags,
6284 _major_version,
6285 loader,
6286 _class_name,
6287 _local_interfaces,
6288 CHECK);
6289
6290 // Size of Java itable (in words)
6291 _itable_size = _access_flags.is_interface() ? 0 :
6292 klassItable::compute_itable_size(_transitive_interfaces);
6293
6294 assert(_fac != NULL, "invariant");
6295 assert(_parsed_annotations != NULL, "invariant");
6296
6297 _field_info = new FieldLayoutInfo();
6298 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6299
6300 // Compute reference typ
6301 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6302
6303}
6304
6305void ClassFileParser::set_klass(InstanceKlass* klass) {
6306
6307#ifdef ASSERT
6308 if (klass != NULL) {
6309 assert(NULL == _klass, "leaking?");
6310 }
6311#endif
6312
6313 _klass = klass;
6314}
6315
6316void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6317
6318#ifdef ASSERT
6319 if (klass != NULL) {
6320 assert(NULL == _klass_to_deallocate, "leaking?");
6321 }
6322#endif
6323
6324 _klass_to_deallocate = klass;
6325}
6326
6327// Caller responsible for ResourceMark
6328// clone stream with rewound position
6329const ClassFileStream* ClassFileParser::clone_stream() const {
6330 assert(_stream != NULL, "invariant");
6331
6332 return _stream->clone();
6333}
6334// ----------------------------------------------------------------------------
6335// debugging
6336
6337#ifdef ASSERT
6338
6339// return true if class_name contains no '.' (internal format is '/')
6340bool ClassFileParser::is_internal_format(Symbol* class_name) {
6341 if (class_name != NULL) {
6342 ResourceMark rm;
6343 char* name = class_name->as_C_string();
6344 return strchr(name, '.') == NULL;
6345 } else {
6346 return true;
6347 }
6348}
6349
6350#endif
6351