Wed, 01 Dec 2010 18:26:32 -0500
6348631: remove the use of the HPI library from Hotspot
Summary: move functions from hpi library to hotspot, communicate with licensees and open source community, check jdk for dependency, file CCC request
Reviewed-by: coleenp, acorn, dsamersoff
1 /*
2 * Copyright (c) 1997, 2010, 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 */
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/verificationType.hpp"
32 #include "classfile/verifier.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "memory/allocation.hpp"
35 #include "memory/gcLocker.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/constantPoolOop.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/klass.inline.hpp"
41 #include "oops/klassOop.hpp"
42 #include "oops/klassVtable.hpp"
43 #include "oops/methodOop.hpp"
44 #include "oops/symbolOop.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "runtime/javaCalls.hpp"
47 #include "runtime/perfData.hpp"
48 #include "runtime/reflection.hpp"
49 #include "runtime/signature.hpp"
50 #include "runtime/timer.hpp"
51 #include "services/classLoadingService.hpp"
52 #include "services/threadService.hpp"
54 // We generally try to create the oops directly when parsing, rather than
55 // allocating temporary data structures and copying the bytes twice. A
56 // temporary area is only needed when parsing utf8 entries in the constant
57 // pool and when parsing line number tables.
59 // We add assert in debug mode when class format is not checked.
61 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
62 #define JAVA_MIN_SUPPORTED_VERSION 45
63 #define JAVA_MAX_SUPPORTED_VERSION 51
64 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
66 // Used for two backward compatibility reasons:
67 // - to check for new additions to the class file format in JDK1.5
68 // - to check for bug fixes in the format checker in JDK1.5
69 #define JAVA_1_5_VERSION 49
71 // Used for backward compatibility reasons:
72 // - to check for javac bug fixes that happened after 1.5
73 // - also used as the max version when running in jdk6
74 #define JAVA_6_VERSION 50
76 // Used for backward compatibility reasons:
77 // - to check NameAndType_info signatures more aggressively
78 #define JAVA_7_VERSION 51
81 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
82 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
83 // this function (_current can be allocated in a register, with scalar
84 // replacement of aggregates). The _current pointer is copied back to
85 // stream() when this function returns. DON'T call another method within
86 // this method that uses stream().
87 ClassFileStream* cfs0 = stream();
88 ClassFileStream cfs1 = *cfs0;
89 ClassFileStream* cfs = &cfs1;
90 #ifdef ASSERT
91 assert(cfs->allocated_on_stack(),"should be local");
92 u1* old_current = cfs0->current();
93 #endif
95 // Used for batching symbol allocations.
96 const char* names[SymbolTable::symbol_alloc_batch_size];
97 int lengths[SymbolTable::symbol_alloc_batch_size];
98 int indices[SymbolTable::symbol_alloc_batch_size];
99 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
100 int names_count = 0;
102 // Side buffer for operands of variable-sized (InvokeDynamic) entries.
103 GrowableArray<int>* operands = NULL;
104 #ifdef ASSERT
105 GrowableArray<int>* indy_instructions = new GrowableArray<int>(THREAD, 10);
106 #endif
108 // parsing Index 0 is unused
109 for (int index = 1; index < length; index++) {
110 // Each of the following case guarantees one more byte in the stream
111 // for the following tag or the access_flags following constant pool,
112 // so we don't need bounds-check for reading tag.
113 u1 tag = cfs->get_u1_fast();
114 switch (tag) {
115 case JVM_CONSTANT_Class :
116 {
117 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
118 u2 name_index = cfs->get_u2_fast();
119 cp->klass_index_at_put(index, name_index);
120 }
121 break;
122 case JVM_CONSTANT_Fieldref :
123 {
124 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
125 u2 class_index = cfs->get_u2_fast();
126 u2 name_and_type_index = cfs->get_u2_fast();
127 cp->field_at_put(index, class_index, name_and_type_index);
128 }
129 break;
130 case JVM_CONSTANT_Methodref :
131 {
132 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
133 u2 class_index = cfs->get_u2_fast();
134 u2 name_and_type_index = cfs->get_u2_fast();
135 cp->method_at_put(index, class_index, name_and_type_index);
136 }
137 break;
138 case JVM_CONSTANT_InterfaceMethodref :
139 {
140 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
141 u2 class_index = cfs->get_u2_fast();
142 u2 name_and_type_index = cfs->get_u2_fast();
143 cp->interface_method_at_put(index, class_index, name_and_type_index);
144 }
145 break;
146 case JVM_CONSTANT_String :
147 {
148 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
149 u2 string_index = cfs->get_u2_fast();
150 cp->string_index_at_put(index, string_index);
151 }
152 break;
153 case JVM_CONSTANT_MethodHandle :
154 case JVM_CONSTANT_MethodType :
155 if (!EnableMethodHandles ||
156 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
157 classfile_parse_error(
158 (!EnableMethodHandles ?
159 "This JVM does not support constant tag %u in class file %s" :
160 "Class file version does not support constant tag %u in class file %s"),
161 tag, CHECK);
162 }
163 if (tag == JVM_CONSTANT_MethodHandle) {
164 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
165 u1 ref_kind = cfs->get_u1_fast();
166 u2 method_index = cfs->get_u2_fast();
167 cp->method_handle_index_at_put(index, ref_kind, method_index);
168 } else if (tag == JVM_CONSTANT_MethodType) {
169 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
170 u2 signature_index = cfs->get_u2_fast();
171 cp->method_type_index_at_put(index, signature_index);
172 } else {
173 ShouldNotReachHere();
174 }
175 break;
176 case JVM_CONSTANT_InvokeDynamicTrans : // this tag appears only in old classfiles
177 case JVM_CONSTANT_InvokeDynamic :
178 {
179 if (!EnableInvokeDynamic ||
180 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
181 classfile_parse_error(
182 (!EnableInvokeDynamic ?
183 "This JVM does not support constant tag %u in class file %s" :
184 "Class file version does not support constant tag %u in class file %s"),
185 tag, CHECK);
186 }
187 if (!AllowTransitionalJSR292 && tag == JVM_CONSTANT_InvokeDynamicTrans) {
188 classfile_parse_error(
189 "This JVM does not support transitional InvokeDynamic tag %u in class file %s",
190 tag, CHECK);
191 }
192 bool trans_no_argc = AllowTransitionalJSR292 && (tag == JVM_CONSTANT_InvokeDynamicTrans);
193 cfs->guarantee_more(7, CHECK); // bsm_index, nt, argc, ..., tag/access_flags
194 u2 bootstrap_method_index = cfs->get_u2_fast();
195 u2 name_and_type_index = cfs->get_u2_fast();
196 int argument_count = trans_no_argc ? 0 : cfs->get_u2_fast();
197 cfs->guarantee_more(2*argument_count + 1, CHECK); // argv[argc]..., tag/access_flags
198 int argv_offset = constantPoolOopDesc::_indy_argv_offset;
199 int op_count = argv_offset + argument_count; // bsm, nt, argc, argv[]...
200 int op_base = start_operand_group(operands, op_count, CHECK);
201 assert(argv_offset == 3, "else adjust next 3 assignments");
202 operands->at_put(op_base + constantPoolOopDesc::_indy_bsm_offset, bootstrap_method_index);
203 operands->at_put(op_base + constantPoolOopDesc::_indy_nt_offset, name_and_type_index);
204 operands->at_put(op_base + constantPoolOopDesc::_indy_argc_offset, argument_count);
205 for (int arg_i = 0; arg_i < argument_count; arg_i++) {
206 int arg = cfs->get_u2_fast();
207 operands->at_put(op_base + constantPoolOopDesc::_indy_argv_offset + arg_i, arg);
208 }
209 cp->invoke_dynamic_at_put(index, op_base, op_count);
210 #ifdef ASSERT
211 // Record the steps just taken for later checking.
212 indy_instructions->append(index);
213 indy_instructions->append(bootstrap_method_index);
214 indy_instructions->append(name_and_type_index);
215 indy_instructions->append(argument_count);
216 #endif //ASSERT
217 }
218 break;
219 case JVM_CONSTANT_Integer :
220 {
221 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
222 u4 bytes = cfs->get_u4_fast();
223 cp->int_at_put(index, (jint) bytes);
224 }
225 break;
226 case JVM_CONSTANT_Float :
227 {
228 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
229 u4 bytes = cfs->get_u4_fast();
230 cp->float_at_put(index, *(jfloat*)&bytes);
231 }
232 break;
233 case JVM_CONSTANT_Long :
234 // A mangled type might cause you to overrun allocated memory
235 guarantee_property(index+1 < length,
236 "Invalid constant pool entry %u in class file %s",
237 index, CHECK);
238 {
239 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
240 u8 bytes = cfs->get_u8_fast();
241 cp->long_at_put(index, bytes);
242 }
243 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
244 break;
245 case JVM_CONSTANT_Double :
246 // A mangled type might cause you to overrun allocated memory
247 guarantee_property(index+1 < length,
248 "Invalid constant pool entry %u in class file %s",
249 index, CHECK);
250 {
251 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
252 u8 bytes = cfs->get_u8_fast();
253 cp->double_at_put(index, *(jdouble*)&bytes);
254 }
255 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
256 break;
257 case JVM_CONSTANT_NameAndType :
258 {
259 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
260 u2 name_index = cfs->get_u2_fast();
261 u2 signature_index = cfs->get_u2_fast();
262 cp->name_and_type_at_put(index, name_index, signature_index);
263 }
264 break;
265 case JVM_CONSTANT_Utf8 :
266 {
267 cfs->guarantee_more(2, CHECK); // utf8_length
268 u2 utf8_length = cfs->get_u2_fast();
269 u1* utf8_buffer = cfs->get_u1_buffer();
270 assert(utf8_buffer != NULL, "null utf8 buffer");
271 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
272 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
273 cfs->skip_u1_fast(utf8_length);
275 // Before storing the symbol, make sure it's legal
276 if (_need_verify) {
277 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
278 }
280 if (AnonymousClasses && has_cp_patch_at(index)) {
281 Handle patch = clear_cp_patch_at(index);
282 guarantee_property(java_lang_String::is_instance(patch()),
283 "Illegal utf8 patch at %d in class file %s",
284 index, CHECK);
285 char* str = java_lang_String::as_utf8_string(patch());
286 // (could use java_lang_String::as_symbol instead, but might as well batch them)
287 utf8_buffer = (u1*) str;
288 utf8_length = (int) strlen(str);
289 }
291 unsigned int hash;
292 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
293 if (result == NULL) {
294 names[names_count] = (char*)utf8_buffer;
295 lengths[names_count] = utf8_length;
296 indices[names_count] = index;
297 hashValues[names_count++] = hash;
298 if (names_count == SymbolTable::symbol_alloc_batch_size) {
299 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
300 names_count = 0;
301 }
302 } else {
303 cp->symbol_at_put(index, result);
304 }
305 }
306 break;
307 default:
308 classfile_parse_error(
309 "Unknown constant tag %u in class file %s", tag, CHECK);
310 break;
311 }
312 }
314 // Allocate the remaining symbols
315 if (names_count > 0) {
316 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
317 }
319 if (operands != NULL && operands->length() > 0) {
320 store_operand_array(operands, cp, CHECK);
321 }
322 #ifdef ASSERT
323 // Re-assert the indy structures, now that assertion checking can work.
324 for (int indy_i = 0; indy_i < indy_instructions->length(); ) {
325 int index = indy_instructions->at(indy_i++);
326 int bootstrap_method_index = indy_instructions->at(indy_i++);
327 int name_and_type_index = indy_instructions->at(indy_i++);
328 int argument_count = indy_instructions->at(indy_i++);
329 assert(cp->check_invoke_dynamic_at(index,
330 bootstrap_method_index, name_and_type_index,
331 argument_count),
332 "indy structure is OK");
333 }
334 #endif //ASSERT
336 // Copy _current pointer of local copy back to stream().
337 #ifdef ASSERT
338 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
339 #endif
340 cfs0->set_current(cfs1.current());
341 }
343 int ClassFileParser::start_operand_group(GrowableArray<int>* &operands, int op_count, TRAPS) {
344 if (operands == NULL) {
345 operands = new GrowableArray<int>(THREAD, 100);
346 int fillp_offset = constantPoolOopDesc::_multi_operand_buffer_fill_pointer_offset;
347 while (operands->length() <= fillp_offset)
348 operands->append(0); // force op_base > 0, for an error check
349 DEBUG_ONLY(operands->at_put(fillp_offset, (int)badHeapWordVal));
350 }
351 int cnt_pos = operands->append(op_count);
352 int arg_pos = operands->length();
353 operands->at_grow(arg_pos + op_count - 1); // grow to include the operands
354 assert(operands->length() == arg_pos + op_count, "");
355 int op_base = cnt_pos - constantPoolOopDesc::_multi_operand_count_offset;
356 return op_base;
357 }
359 void ClassFileParser::store_operand_array(GrowableArray<int>* operands, constantPoolHandle cp, TRAPS) {
360 // Collect the buffer of operands from variable-sized entries into a permanent array.
361 int arraylen = operands->length();
362 int fillp_offset = constantPoolOopDesc::_multi_operand_buffer_fill_pointer_offset;
363 assert(operands->at(fillp_offset) == (int)badHeapWordVal, "value unused so far");
364 operands->at_put(fillp_offset, arraylen);
365 cp->multi_operand_buffer_grow(arraylen, CHECK);
366 typeArrayOop operands_oop = cp->operands();
367 assert(operands_oop->length() == arraylen, "");
368 for (int i = 0; i < arraylen; i++) {
369 operands_oop->int_at_put(i, operands->at(i));
370 }
371 cp->set_operands(operands_oop);
372 // The fill_pointer is used only by constantPoolOop::copy_entry_to and friends,
373 // when constant pools need to be merged. Make sure it is sane now.
374 assert(cp->multi_operand_buffer_fill_pointer() == arraylen, "");
375 }
378 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
380 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
381 ClassFileStream* cfs = stream();
382 constantPoolHandle nullHandle;
384 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
385 u2 length = cfs->get_u2_fast();
386 guarantee_property(
387 length >= 1, "Illegal constant pool size %u in class file %s",
388 length, CHECK_(nullHandle));
389 constantPoolOop constant_pool =
390 oopFactory::new_constantPool(length,
391 methodOopDesc::IsSafeConc,
392 CHECK_(nullHandle));
393 constantPoolHandle cp (THREAD, constant_pool);
395 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
397 // parsing constant pool entries
398 parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
400 int index = 1; // declared outside of loops for portability
402 // first verification pass - validate cross references and fixup class and string constants
403 for (index = 1; index < length; index++) { // Index 0 is unused
404 switch (cp->tag_at(index).value()) {
405 case JVM_CONSTANT_Class :
406 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
407 break;
408 case JVM_CONSTANT_Fieldref :
409 // fall through
410 case JVM_CONSTANT_Methodref :
411 // fall through
412 case JVM_CONSTANT_InterfaceMethodref : {
413 if (!_need_verify) break;
414 int klass_ref_index = cp->klass_ref_index_at(index);
415 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
416 check_property(valid_cp_range(klass_ref_index, length) &&
417 is_klass_reference(cp, klass_ref_index),
418 "Invalid constant pool index %u in class file %s",
419 klass_ref_index,
420 CHECK_(nullHandle));
421 check_property(valid_cp_range(name_and_type_ref_index, length) &&
422 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
423 "Invalid constant pool index %u in class file %s",
424 name_and_type_ref_index,
425 CHECK_(nullHandle));
426 break;
427 }
428 case JVM_CONSTANT_String :
429 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
430 break;
431 case JVM_CONSTANT_Integer :
432 break;
433 case JVM_CONSTANT_Float :
434 break;
435 case JVM_CONSTANT_Long :
436 case JVM_CONSTANT_Double :
437 index++;
438 check_property(
439 (index < length && cp->tag_at(index).is_invalid()),
440 "Improper constant pool long/double index %u in class file %s",
441 index, CHECK_(nullHandle));
442 break;
443 case JVM_CONSTANT_NameAndType : {
444 if (!_need_verify) break;
445 int name_ref_index = cp->name_ref_index_at(index);
446 int signature_ref_index = cp->signature_ref_index_at(index);
447 check_property(
448 valid_cp_range(name_ref_index, length) &&
449 cp->tag_at(name_ref_index).is_utf8(),
450 "Invalid constant pool index %u in class file %s",
451 name_ref_index, CHECK_(nullHandle));
452 check_property(
453 valid_cp_range(signature_ref_index, length) &&
454 cp->tag_at(signature_ref_index).is_utf8(),
455 "Invalid constant pool index %u in class file %s",
456 signature_ref_index, CHECK_(nullHandle));
457 break;
458 }
459 case JVM_CONSTANT_Utf8 :
460 break;
461 case JVM_CONSTANT_UnresolvedClass : // fall-through
462 case JVM_CONSTANT_UnresolvedClassInError:
463 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
464 break;
465 case JVM_CONSTANT_ClassIndex :
466 {
467 int class_index = cp->klass_index_at(index);
468 check_property(
469 valid_cp_range(class_index, length) &&
470 cp->tag_at(class_index).is_utf8(),
471 "Invalid constant pool index %u in class file %s",
472 class_index, CHECK_(nullHandle));
473 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
474 }
475 break;
476 case JVM_CONSTANT_UnresolvedString :
477 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
478 break;
479 case JVM_CONSTANT_StringIndex :
480 {
481 int string_index = cp->string_index_at(index);
482 check_property(
483 valid_cp_range(string_index, length) &&
484 cp->tag_at(string_index).is_utf8(),
485 "Invalid constant pool index %u in class file %s",
486 string_index, CHECK_(nullHandle));
487 symbolOop sym = cp->symbol_at(string_index);
488 cp->unresolved_string_at_put(index, sym);
489 }
490 break;
491 case JVM_CONSTANT_MethodHandle :
492 {
493 int ref_index = cp->method_handle_index_at(index);
494 check_property(
495 valid_cp_range(ref_index, length) &&
496 EnableMethodHandles,
497 "Invalid constant pool index %u in class file %s",
498 ref_index, CHECK_(nullHandle));
499 constantTag tag = cp->tag_at(ref_index);
500 int ref_kind = cp->method_handle_ref_kind_at(index);
501 switch (ref_kind) {
502 case JVM_REF_getField:
503 case JVM_REF_getStatic:
504 case JVM_REF_putField:
505 case JVM_REF_putStatic:
506 check_property(
507 tag.is_field(),
508 "Invalid constant pool index %u in class file %s (not a field)",
509 ref_index, CHECK_(nullHandle));
510 break;
511 case JVM_REF_invokeVirtual:
512 case JVM_REF_invokeStatic:
513 case JVM_REF_invokeSpecial:
514 case JVM_REF_newInvokeSpecial:
515 check_property(
516 tag.is_method(),
517 "Invalid constant pool index %u in class file %s (not a method)",
518 ref_index, CHECK_(nullHandle));
519 break;
520 case JVM_REF_invokeInterface:
521 check_property(
522 tag.is_interface_method(),
523 "Invalid constant pool index %u in class file %s (not an interface method)",
524 ref_index, CHECK_(nullHandle));
525 break;
526 default:
527 classfile_parse_error(
528 "Bad method handle kind at constant pool index %u in class file %s",
529 index, CHECK_(nullHandle));
530 }
531 // Keep the ref_index unchanged. It will be indirected at link-time.
532 }
533 break;
534 case JVM_CONSTANT_MethodType :
535 {
536 int ref_index = cp->method_type_index_at(index);
537 check_property(
538 valid_cp_range(ref_index, length) &&
539 cp->tag_at(ref_index).is_utf8() &&
540 EnableMethodHandles,
541 "Invalid constant pool index %u in class file %s",
542 ref_index, CHECK_(nullHandle));
543 }
544 break;
545 case JVM_CONSTANT_InvokeDynamicTrans :
546 ShouldNotReachHere(); // this tag does not appear in the heap
547 case JVM_CONSTANT_InvokeDynamic :
548 {
549 int bootstrap_method_ref_index = cp->invoke_dynamic_bootstrap_method_ref_index_at(index);
550 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
551 check_property((bootstrap_method_ref_index == 0 && AllowTransitionalJSR292)
552 ||
553 (valid_cp_range(bootstrap_method_ref_index, length) &&
554 (cp->tag_at(bootstrap_method_ref_index).is_method_handle())),
555 "Invalid constant pool index %u in class file %s",
556 bootstrap_method_ref_index,
557 CHECK_(nullHandle));
558 check_property(valid_cp_range(name_and_type_ref_index, length) &&
559 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
560 "Invalid constant pool index %u in class file %s",
561 name_and_type_ref_index,
562 CHECK_(nullHandle));
563 int argc = cp->invoke_dynamic_argument_count_at(index);
564 for (int arg_i = 0; arg_i < argc; arg_i++) {
565 int arg = cp->invoke_dynamic_argument_index_at(index, arg_i);
566 check_property(valid_cp_range(arg, length) &&
567 cp->tag_at(arg).is_loadable_constant() ||
568 // temporary early forms of string and class:
569 cp->tag_at(arg).is_klass_index() ||
570 cp->tag_at(arg).is_string_index(),
571 "Invalid constant pool index %u in class file %s",
572 arg,
573 CHECK_(nullHandle));
574 }
575 break;
576 }
577 default:
578 fatal(err_msg("bad constant pool tag value %u",
579 cp->tag_at(index).value()));
580 ShouldNotReachHere();
581 break;
582 } // end of switch
583 } // end of for
585 if (_cp_patches != NULL) {
586 // need to treat this_class specially...
587 assert(AnonymousClasses, "");
588 int this_class_index;
589 {
590 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
591 u1* mark = cfs->current();
592 u2 flags = cfs->get_u2_fast();
593 this_class_index = cfs->get_u2_fast();
594 cfs->set_current(mark); // revert to mark
595 }
597 for (index = 1; index < length; index++) { // Index 0 is unused
598 if (has_cp_patch_at(index)) {
599 guarantee_property(index != this_class_index,
600 "Illegal constant pool patch to self at %d in class file %s",
601 index, CHECK_(nullHandle));
602 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
603 }
604 }
605 // Ensure that all the patches have been used.
606 for (index = 0; index < _cp_patches->length(); index++) {
607 guarantee_property(!has_cp_patch_at(index),
608 "Unused constant pool patch at %d in class file %s",
609 index, CHECK_(nullHandle));
610 }
611 }
613 if (!_need_verify) {
614 return cp;
615 }
617 // second verification pass - checks the strings are of the right format.
618 // but not yet to the other entries
619 for (index = 1; index < length; index++) {
620 jbyte tag = cp->tag_at(index).value();
621 switch (tag) {
622 case JVM_CONSTANT_UnresolvedClass: {
623 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index));
624 // check the name, even if _cp_patches will overwrite it
625 verify_legal_class_name(class_name, CHECK_(nullHandle));
626 break;
627 }
628 case JVM_CONSTANT_NameAndType: {
629 if (_need_verify && _major_version >= JAVA_7_VERSION) {
630 int sig_index = cp->signature_ref_index_at(index);
631 int name_index = cp->name_ref_index_at(index);
632 symbolHandle name(THREAD, cp->symbol_at(name_index));
633 symbolHandle sig(THREAD, cp->symbol_at(sig_index));
634 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
635 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
636 } else {
637 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
638 }
639 }
640 break;
641 }
642 case JVM_CONSTANT_Fieldref:
643 case JVM_CONSTANT_Methodref:
644 case JVM_CONSTANT_InterfaceMethodref: {
645 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
646 // already verified to be utf8
647 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
648 // already verified to be utf8
649 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
650 symbolHandle name(THREAD, cp->symbol_at(name_ref_index));
651 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index));
652 if (tag == JVM_CONSTANT_Fieldref) {
653 verify_legal_field_name(name, CHECK_(nullHandle));
654 if (_need_verify && _major_version >= JAVA_7_VERSION) {
655 // Signature is verified above, when iterating NameAndType_info.
656 // Need only to be sure it's the right type.
657 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
658 throwIllegalSignature(
659 "Field", name, signature, CHECK_(nullHandle));
660 }
661 } else {
662 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
663 }
664 } else {
665 verify_legal_method_name(name, CHECK_(nullHandle));
666 if (_need_verify && _major_version >= JAVA_7_VERSION) {
667 // Signature is verified above, when iterating NameAndType_info.
668 // Need only to be sure it's the right type.
669 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
670 throwIllegalSignature(
671 "Method", name, signature, CHECK_(nullHandle));
672 }
673 } else {
674 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
675 }
676 if (tag == JVM_CONSTANT_Methodref) {
677 // 4509014: If a class method name begins with '<', it must be "<init>".
678 assert(!name.is_null(), "method name in constant pool is null");
679 unsigned int name_len = name->utf8_length();
680 assert(name_len > 0, "bad method name"); // already verified as legal name
681 if (name->byte_at(0) == '<') {
682 if (name() != vmSymbols::object_initializer_name()) {
683 classfile_parse_error(
684 "Bad method name at constant pool index %u in class file %s",
685 name_ref_index, CHECK_(nullHandle));
686 }
687 }
688 }
689 }
690 break;
691 }
692 case JVM_CONSTANT_MethodHandle: {
693 int ref_index = cp->method_handle_index_at(index);
694 int ref_kind = cp->method_handle_ref_kind_at(index);
695 switch (ref_kind) {
696 case JVM_REF_invokeVirtual:
697 case JVM_REF_invokeStatic:
698 case JVM_REF_invokeSpecial:
699 case JVM_REF_newInvokeSpecial:
700 {
701 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
702 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
703 symbolHandle name(THREAD, cp->symbol_at(name_ref_index));
704 if (ref_kind == JVM_REF_newInvokeSpecial) {
705 if (name() != vmSymbols::object_initializer_name()) {
706 classfile_parse_error(
707 "Bad constructor name at constant pool index %u in class file %s",
708 name_ref_index, CHECK_(nullHandle));
709 }
710 } else {
711 if (name() == vmSymbols::object_initializer_name()) {
712 classfile_parse_error(
713 "Bad method name at constant pool index %u in class file %s",
714 name_ref_index, CHECK_(nullHandle));
715 }
716 }
717 }
718 break;
719 // Other ref_kinds are already fully checked in previous pass.
720 }
721 break;
722 }
723 case JVM_CONSTANT_MethodType: {
724 symbolHandle no_name = vmSymbolHandles::type_name(); // place holder
725 symbolHandle signature(THREAD, cp->method_type_signature_at(index));
726 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
727 break;
728 }
729 } // end of switch
730 } // end of for
732 return cp;
733 }
736 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
737 assert(AnonymousClasses, "");
738 BasicType patch_type = T_VOID;
739 switch (cp->tag_at(index).value()) {
741 case JVM_CONSTANT_UnresolvedClass :
742 // Patching a class means pre-resolving it.
743 // The name in the constant pool is ignored.
744 if (java_lang_Class::is_instance(patch())) {
745 guarantee_property(!java_lang_Class::is_primitive(patch()),
746 "Illegal class patch at %d in class file %s",
747 index, CHECK);
748 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch()));
749 } else {
750 guarantee_property(java_lang_String::is_instance(patch()),
751 "Illegal class patch at %d in class file %s",
752 index, CHECK);
753 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK);
754 cp->unresolved_klass_at_put(index, name());
755 }
756 break;
758 case JVM_CONSTANT_UnresolvedString :
759 // Patching a string means pre-resolving it.
760 // The spelling in the constant pool is ignored.
761 // The constant reference may be any object whatever.
762 // If it is not a real interned string, the constant is referred
763 // to as a "pseudo-string", and must be presented to the CP
764 // explicitly, because it may require scavenging.
765 cp->pseudo_string_at_put(index, patch());
766 break;
768 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
769 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
770 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
771 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
772 patch_prim:
773 {
774 jvalue value;
775 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
776 guarantee_property(value_type == patch_type,
777 "Illegal primitive patch at %d in class file %s",
778 index, CHECK);
779 switch (value_type) {
780 case T_INT: cp->int_at_put(index, value.i); break;
781 case T_FLOAT: cp->float_at_put(index, value.f); break;
782 case T_LONG: cp->long_at_put(index, value.j); break;
783 case T_DOUBLE: cp->double_at_put(index, value.d); break;
784 default: assert(false, "");
785 }
786 }
787 break;
789 default:
790 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
791 guarantee_property(!has_cp_patch_at(index),
792 "Illegal unexpected patch at %d in class file %s",
793 index, CHECK);
794 return;
795 }
797 // On fall-through, mark the patch as used.
798 clear_cp_patch_at(index);
799 }
803 class NameSigHash: public ResourceObj {
804 public:
805 symbolOop _name; // name
806 symbolOop _sig; // signature
807 NameSigHash* _next; // Next entry in hash table
808 };
811 #define HASH_ROW_SIZE 256
813 unsigned int hash(symbolOop name, symbolOop sig) {
814 unsigned int raw_hash = 0;
815 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
816 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
818 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
819 }
822 void initialize_hashtable(NameSigHash** table) {
823 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
824 }
826 // Return false if the name/sig combination is found in table.
827 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
828 // The old format checker uses heap sort to find duplicates.
829 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
830 // of table since we don't expect symbolOop's to move.
831 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) {
832 assert(name != NULL, "name in constant pool is NULL");
834 // First lookup for duplicates
835 int index = hash(name, sig);
836 NameSigHash* entry = table[index];
837 while (entry != NULL) {
838 if (entry->_name == name && entry->_sig == sig) {
839 return false;
840 }
841 entry = entry->_next;
842 }
844 // No duplicate is found, allocate a new entry and fill it.
845 entry = new NameSigHash();
846 entry->_name = name;
847 entry->_sig = sig;
849 // Insert into hash table
850 entry->_next = table[index];
851 table[index] = entry;
853 return true;
854 }
857 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
858 int length,
859 Handle class_loader,
860 Handle protection_domain,
861 symbolHandle class_name,
862 TRAPS) {
863 ClassFileStream* cfs = stream();
864 assert(length > 0, "only called for length>0");
865 objArrayHandle nullHandle;
866 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
867 objArrayHandle interfaces (THREAD, interface_oop);
869 int index;
870 for (index = 0; index < length; index++) {
871 u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
872 KlassHandle interf;
873 check_property(
874 valid_cp_range(interface_index, cp->length()) &&
875 is_klass_reference(cp, interface_index),
876 "Interface name has bad constant pool index %u in class file %s",
877 interface_index, CHECK_(nullHandle));
878 if (cp->tag_at(interface_index).is_klass()) {
879 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
880 } else {
881 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index));
883 // Don't need to check legal name because it's checked when parsing constant pool.
884 // But need to make sure it's not an array type.
885 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
886 "Bad interface name in class file %s", CHECK_(nullHandle));
888 // Call resolve_super so classcircularity is checked
889 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
890 unresolved_klass, class_loader, protection_domain,
891 false, CHECK_(nullHandle));
892 interf = KlassHandle(THREAD, k);
894 if (LinkWellKnownClasses) // my super type is well known to me
895 cp->klass_at_put(interface_index, interf()); // eagerly resolve
896 }
898 if (!Klass::cast(interf())->is_interface()) {
899 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
900 }
901 interfaces->obj_at_put(index, interf());
902 }
904 if (!_need_verify || length <= 1) {
905 return interfaces;
906 }
908 // Check if there's any duplicates in interfaces
909 ResourceMark rm(THREAD);
910 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
911 THREAD, NameSigHash*, HASH_ROW_SIZE);
912 initialize_hashtable(interface_names);
913 bool dup = false;
914 {
915 debug_only(No_Safepoint_Verifier nsv;)
916 for (index = 0; index < length; index++) {
917 klassOop k = (klassOop)interfaces->obj_at(index);
918 symbolOop name = instanceKlass::cast(k)->name();
919 // If no duplicates, add (name, NULL) in hashtable interface_names.
920 if (!put_after_lookup(name, NULL, interface_names)) {
921 dup = true;
922 break;
923 }
924 }
925 }
926 if (dup) {
927 classfile_parse_error("Duplicate interface name in class file %s",
928 CHECK_(nullHandle));
929 }
931 return interfaces;
932 }
935 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
936 // Make sure the constant pool entry is of a type appropriate to this field
937 guarantee_property(
938 (constantvalue_index > 0 &&
939 constantvalue_index < cp->length()),
940 "Bad initial value index %u in ConstantValue attribute in class file %s",
941 constantvalue_index, CHECK);
942 constantTag value_type = cp->tag_at(constantvalue_index);
943 switch ( cp->basic_type_for_signature_at(signature_index) ) {
944 case T_LONG:
945 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
946 break;
947 case T_FLOAT:
948 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
949 break;
950 case T_DOUBLE:
951 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
952 break;
953 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
954 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
955 break;
956 case T_OBJECT:
957 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
958 && (value_type.is_string() || value_type.is_unresolved_string())),
959 "Bad string initial value in class file %s", CHECK);
960 break;
961 default:
962 classfile_parse_error(
963 "Unable to set initial value %u in class file %s",
964 constantvalue_index, CHECK);
965 }
966 }
969 // Parse attributes for a field.
970 void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
971 u2 attributes_count,
972 bool is_static, u2 signature_index,
973 u2* constantvalue_index_addr,
974 bool* is_synthetic_addr,
975 u2* generic_signature_index_addr,
976 typeArrayHandle* field_annotations,
977 TRAPS) {
978 ClassFileStream* cfs = stream();
979 assert(attributes_count > 0, "length should be greater than 0");
980 u2 constantvalue_index = 0;
981 u2 generic_signature_index = 0;
982 bool is_synthetic = false;
983 u1* runtime_visible_annotations = NULL;
984 int runtime_visible_annotations_length = 0;
985 u1* runtime_invisible_annotations = NULL;
986 int runtime_invisible_annotations_length = 0;
987 while (attributes_count--) {
988 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
989 u2 attribute_name_index = cfs->get_u2_fast();
990 u4 attribute_length = cfs->get_u4_fast();
991 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
992 cp->tag_at(attribute_name_index).is_utf8(),
993 "Invalid field attribute index %u in class file %s",
994 attribute_name_index,
995 CHECK);
996 symbolOop attribute_name = cp->symbol_at(attribute_name_index);
997 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
998 // ignore if non-static
999 if (constantvalue_index != 0) {
1000 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1001 }
1002 check_property(
1003 attribute_length == 2,
1004 "Invalid ConstantValue field attribute length %u in class file %s",
1005 attribute_length, CHECK);
1006 constantvalue_index = cfs->get_u2(CHECK);
1007 if (_need_verify) {
1008 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
1009 }
1010 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1011 if (attribute_length != 0) {
1012 classfile_parse_error(
1013 "Invalid Synthetic field attribute length %u in class file %s",
1014 attribute_length, CHECK);
1015 }
1016 is_synthetic = true;
1017 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1018 if (attribute_length != 0) {
1019 classfile_parse_error(
1020 "Invalid Deprecated field attribute length %u in class file %s",
1021 attribute_length, CHECK);
1022 }
1023 } else if (_major_version >= JAVA_1_5_VERSION) {
1024 if (attribute_name == vmSymbols::tag_signature()) {
1025 if (attribute_length != 2) {
1026 classfile_parse_error(
1027 "Wrong size %u for field's Signature attribute in class file %s",
1028 attribute_length, CHECK);
1029 }
1030 generic_signature_index = cfs->get_u2(CHECK);
1031 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1032 runtime_visible_annotations_length = attribute_length;
1033 runtime_visible_annotations = cfs->get_u1_buffer();
1034 assert(runtime_visible_annotations != NULL, "null visible annotations");
1035 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1036 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1037 runtime_invisible_annotations_length = attribute_length;
1038 runtime_invisible_annotations = cfs->get_u1_buffer();
1039 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1040 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
1041 } else {
1042 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1043 }
1044 } else {
1045 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1046 }
1047 }
1049 *constantvalue_index_addr = constantvalue_index;
1050 *is_synthetic_addr = is_synthetic;
1051 *generic_signature_index_addr = generic_signature_index;
1052 *field_annotations = assemble_annotations(runtime_visible_annotations,
1053 runtime_visible_annotations_length,
1054 runtime_invisible_annotations,
1055 runtime_invisible_annotations_length,
1056 CHECK);
1057 return;
1058 }
1061 // Field allocation types. Used for computing field offsets.
1063 enum FieldAllocationType {
1064 STATIC_OOP, // Oops
1065 STATIC_BYTE, // Boolean, Byte, char
1066 STATIC_SHORT, // shorts
1067 STATIC_WORD, // ints
1068 STATIC_DOUBLE, // long or double
1069 STATIC_ALIGNED_DOUBLE,// aligned long or double
1070 NONSTATIC_OOP,
1071 NONSTATIC_BYTE,
1072 NONSTATIC_SHORT,
1073 NONSTATIC_WORD,
1074 NONSTATIC_DOUBLE,
1075 NONSTATIC_ALIGNED_DOUBLE
1076 };
1079 struct FieldAllocationCount {
1080 unsigned int static_oop_count;
1081 unsigned int static_byte_count;
1082 unsigned int static_short_count;
1083 unsigned int static_word_count;
1084 unsigned int static_double_count;
1085 unsigned int nonstatic_oop_count;
1086 unsigned int nonstatic_byte_count;
1087 unsigned int nonstatic_short_count;
1088 unsigned int nonstatic_word_count;
1089 unsigned int nonstatic_double_count;
1090 };
1092 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface,
1093 struct FieldAllocationCount *fac,
1094 objArrayHandle* fields_annotations, TRAPS) {
1095 ClassFileStream* cfs = stream();
1096 typeArrayHandle nullHandle;
1097 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1098 u2 length = cfs->get_u2_fast();
1099 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
1100 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle));
1101 typeArrayHandle fields(THREAD, new_fields);
1103 int index = 0;
1104 typeArrayHandle field_annotations;
1105 for (int n = 0; n < length; n++) {
1106 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1108 AccessFlags access_flags;
1109 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1110 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1111 access_flags.set_flags(flags);
1113 u2 name_index = cfs->get_u2_fast();
1114 int cp_size = cp->length();
1115 check_property(
1116 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1117 "Invalid constant pool index %u for field name in class file %s",
1118 name_index, CHECK_(nullHandle));
1119 symbolHandle name(THREAD, cp->symbol_at(name_index));
1120 verify_legal_field_name(name, CHECK_(nullHandle));
1122 u2 signature_index = cfs->get_u2_fast();
1123 check_property(
1124 valid_cp_range(signature_index, cp_size) &&
1125 cp->tag_at(signature_index).is_utf8(),
1126 "Invalid constant pool index %u for field signature in class file %s",
1127 signature_index, CHECK_(nullHandle));
1128 symbolHandle sig(THREAD, cp->symbol_at(signature_index));
1129 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1131 u2 constantvalue_index = 0;
1132 bool is_synthetic = false;
1133 u2 generic_signature_index = 0;
1134 bool is_static = access_flags.is_static();
1136 u2 attributes_count = cfs->get_u2_fast();
1137 if (attributes_count > 0) {
1138 parse_field_attributes(cp, attributes_count, is_static, signature_index,
1139 &constantvalue_index, &is_synthetic,
1140 &generic_signature_index, &field_annotations,
1141 CHECK_(nullHandle));
1142 if (field_annotations.not_null()) {
1143 if (fields_annotations->is_null()) {
1144 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1145 *fields_annotations = objArrayHandle(THREAD, md);
1146 }
1147 (*fields_annotations)->obj_at_put(n, field_annotations());
1148 }
1149 if (is_synthetic) {
1150 access_flags.set_is_synthetic();
1151 }
1152 }
1154 fields->short_at_put(index++, access_flags.as_short());
1155 fields->short_at_put(index++, name_index);
1156 fields->short_at_put(index++, signature_index);
1157 fields->short_at_put(index++, constantvalue_index);
1159 // Remember how many oops we encountered and compute allocation type
1160 BasicType type = cp->basic_type_for_signature_at(signature_index);
1161 FieldAllocationType atype;
1162 if ( is_static ) {
1163 switch ( type ) {
1164 case T_BOOLEAN:
1165 case T_BYTE:
1166 fac->static_byte_count++;
1167 atype = STATIC_BYTE;
1168 break;
1169 case T_LONG:
1170 case T_DOUBLE:
1171 if (Universe::field_type_should_be_aligned(type)) {
1172 atype = STATIC_ALIGNED_DOUBLE;
1173 } else {
1174 atype = STATIC_DOUBLE;
1175 }
1176 fac->static_double_count++;
1177 break;
1178 case T_CHAR:
1179 case T_SHORT:
1180 fac->static_short_count++;
1181 atype = STATIC_SHORT;
1182 break;
1183 case T_FLOAT:
1184 case T_INT:
1185 fac->static_word_count++;
1186 atype = STATIC_WORD;
1187 break;
1188 case T_ARRAY:
1189 case T_OBJECT:
1190 fac->static_oop_count++;
1191 atype = STATIC_OOP;
1192 break;
1193 case T_ADDRESS:
1194 case T_VOID:
1195 default:
1196 assert(0, "bad field type");
1197 }
1198 } else {
1199 switch ( type ) {
1200 case T_BOOLEAN:
1201 case T_BYTE:
1202 fac->nonstatic_byte_count++;
1203 atype = NONSTATIC_BYTE;
1204 break;
1205 case T_LONG:
1206 case T_DOUBLE:
1207 if (Universe::field_type_should_be_aligned(type)) {
1208 atype = NONSTATIC_ALIGNED_DOUBLE;
1209 } else {
1210 atype = NONSTATIC_DOUBLE;
1211 }
1212 fac->nonstatic_double_count++;
1213 break;
1214 case T_CHAR:
1215 case T_SHORT:
1216 fac->nonstatic_short_count++;
1217 atype = NONSTATIC_SHORT;
1218 break;
1219 case T_FLOAT:
1220 case T_INT:
1221 fac->nonstatic_word_count++;
1222 atype = NONSTATIC_WORD;
1223 break;
1224 case T_ARRAY:
1225 case T_OBJECT:
1226 fac->nonstatic_oop_count++;
1227 atype = NONSTATIC_OOP;
1228 break;
1229 case T_ADDRESS:
1230 case T_VOID:
1231 default:
1232 assert(0, "bad field type");
1233 }
1234 }
1236 // The correct offset is computed later (all oop fields will be located together)
1237 // We temporarily store the allocation type in the offset field
1238 fields->short_at_put(index++, atype);
1239 fields->short_at_put(index++, 0); // Clear out high word of byte offset
1240 fields->short_at_put(index++, generic_signature_index);
1241 }
1243 if (_need_verify && length > 1) {
1244 // Check duplicated fields
1245 ResourceMark rm(THREAD);
1246 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1247 THREAD, NameSigHash*, HASH_ROW_SIZE);
1248 initialize_hashtable(names_and_sigs);
1249 bool dup = false;
1250 {
1251 debug_only(No_Safepoint_Verifier nsv;)
1252 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) {
1253 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
1254 symbolOop name = cp->symbol_at(name_index);
1255 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
1256 symbolOop sig = cp->symbol_at(sig_index);
1257 // If no duplicates, add name/signature in hashtable names_and_sigs.
1258 if (!put_after_lookup(name, sig, names_and_sigs)) {
1259 dup = true;
1260 break;
1261 }
1262 }
1263 }
1264 if (dup) {
1265 classfile_parse_error("Duplicate field name&signature in class file %s",
1266 CHECK_(nullHandle));
1267 }
1268 }
1270 return fields;
1271 }
1274 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1275 while (length-- > 0) {
1276 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1277 }
1278 }
1281 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
1282 u4 exception_table_length,
1283 constantPoolHandle cp,
1284 TRAPS) {
1285 ClassFileStream* cfs = stream();
1286 typeArrayHandle nullHandle;
1288 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
1289 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
1290 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
1292 int index = 0;
1293 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
1294 for (unsigned int i = 0; i < exception_table_length; i++) {
1295 u2 start_pc = cfs->get_u2_fast();
1296 u2 end_pc = cfs->get_u2_fast();
1297 u2 handler_pc = cfs->get_u2_fast();
1298 u2 catch_type_index = cfs->get_u2_fast();
1299 // Will check legal target after parsing code array in verifier.
1300 if (_need_verify) {
1301 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1302 "Illegal exception table range in class file %s", CHECK_(nullHandle));
1303 guarantee_property(handler_pc < code_length,
1304 "Illegal exception table handler in class file %s", CHECK_(nullHandle));
1305 if (catch_type_index != 0) {
1306 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1307 is_klass_reference(cp, catch_type_index),
1308 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
1309 }
1310 }
1311 exception_handlers->int_at_put(index++, start_pc);
1312 exception_handlers->int_at_put(index++, end_pc);
1313 exception_handlers->int_at_put(index++, handler_pc);
1314 exception_handlers->int_at_put(index++, catch_type_index);
1315 }
1316 return exception_handlers;
1317 }
1319 void ClassFileParser::parse_linenumber_table(
1320 u4 code_attribute_length, u4 code_length,
1321 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1322 ClassFileStream* cfs = stream();
1323 unsigned int num_entries = cfs->get_u2(CHECK);
1325 // Each entry is a u2 start_pc, and a u2 line_number
1326 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1328 // Verify line number attribute and table length
1329 check_property(
1330 code_attribute_length == sizeof(u2) + length_in_bytes,
1331 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1333 cfs->guarantee_more(length_in_bytes, CHECK);
1335 if ((*write_stream) == NULL) {
1336 if (length_in_bytes > fixed_buffer_size) {
1337 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1338 } else {
1339 (*write_stream) = new CompressedLineNumberWriteStream(
1340 linenumbertable_buffer, fixed_buffer_size);
1341 }
1342 }
1344 while (num_entries-- > 0) {
1345 u2 bci = cfs->get_u2_fast(); // start_pc
1346 u2 line = cfs->get_u2_fast(); // line_number
1347 guarantee_property(bci < code_length,
1348 "Invalid pc in LineNumberTable in class file %s", CHECK);
1349 (*write_stream)->write_pair(bci, line);
1350 }
1351 }
1354 // Class file LocalVariableTable elements.
1355 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1356 public:
1357 u2 start_bci;
1358 u2 length;
1359 u2 name_cp_index;
1360 u2 descriptor_cp_index;
1361 u2 slot;
1362 };
1365 class LVT_Hash: public CHeapObj {
1366 public:
1367 LocalVariableTableElement *_elem; // element
1368 LVT_Hash* _next; // Next entry in hash table
1369 };
1371 unsigned int hash(LocalVariableTableElement *elem) {
1372 unsigned int raw_hash = elem->start_bci;
1374 raw_hash = elem->length + raw_hash * 37;
1375 raw_hash = elem->name_cp_index + raw_hash * 37;
1376 raw_hash = elem->slot + raw_hash * 37;
1378 return raw_hash % HASH_ROW_SIZE;
1379 }
1381 void initialize_hashtable(LVT_Hash** table) {
1382 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1383 table[i] = NULL;
1384 }
1385 }
1387 void clear_hashtable(LVT_Hash** table) {
1388 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1389 LVT_Hash* current = table[i];
1390 LVT_Hash* next;
1391 while (current != NULL) {
1392 next = current->_next;
1393 current->_next = NULL;
1394 delete(current);
1395 current = next;
1396 }
1397 table[i] = NULL;
1398 }
1399 }
1401 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1402 LVT_Hash* entry = table[index];
1404 /*
1405 * 3-tuple start_bci/length/slot has to be unique key,
1406 * so the following comparison seems to be redundant:
1407 * && elem->name_cp_index == entry->_elem->name_cp_index
1408 */
1409 while (entry != NULL) {
1410 if (elem->start_bci == entry->_elem->start_bci
1411 && elem->length == entry->_elem->length
1412 && elem->name_cp_index == entry->_elem->name_cp_index
1413 && elem->slot == entry->_elem->slot
1414 ) {
1415 return entry;
1416 }
1417 entry = entry->_next;
1418 }
1419 return NULL;
1420 }
1422 // Return false if the local variable is found in table.
1423 // Return true if no duplicate is found.
1424 // And local variable is added as a new entry in table.
1425 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1426 // First lookup for duplicates
1427 int index = hash(elem);
1428 LVT_Hash* entry = LVT_lookup(elem, index, table);
1430 if (entry != NULL) {
1431 return false;
1432 }
1433 // No duplicate is found, allocate a new entry and fill it.
1434 if ((entry = new LVT_Hash()) == NULL) {
1435 return false;
1436 }
1437 entry->_elem = elem;
1439 // Insert into hash table
1440 entry->_next = table[index];
1441 table[index] = entry;
1443 return true;
1444 }
1446 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1447 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1448 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1449 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1450 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1451 lvt->signature_cp_index = 0;
1452 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1453 }
1455 // Function is used to parse both attributes:
1456 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1457 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1458 u2 max_locals,
1459 u4 code_attribute_length,
1460 constantPoolHandle cp,
1461 u2* localvariable_table_length,
1462 bool isLVTT,
1463 TRAPS) {
1464 ClassFileStream* cfs = stream();
1465 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1466 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1467 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1468 // Verify local variable table attribute has right length
1469 if (_need_verify) {
1470 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1471 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1472 }
1473 u2* localvariable_table_start = cfs->get_u2_buffer();
1474 assert(localvariable_table_start != NULL, "null local variable table");
1475 if (!_need_verify) {
1476 cfs->skip_u2_fast(size);
1477 } else {
1478 cfs->guarantee_more(size * 2, CHECK_NULL);
1479 for(int i = 0; i < (*localvariable_table_length); i++) {
1480 u2 start_pc = cfs->get_u2_fast();
1481 u2 length = cfs->get_u2_fast();
1482 u2 name_index = cfs->get_u2_fast();
1483 u2 descriptor_index = cfs->get_u2_fast();
1484 u2 index = cfs->get_u2_fast();
1485 // Assign to a u4 to avoid overflow
1486 u4 end_pc = (u4)start_pc + (u4)length;
1488 if (start_pc >= code_length) {
1489 classfile_parse_error(
1490 "Invalid start_pc %u in %s in class file %s",
1491 start_pc, tbl_name, CHECK_NULL);
1492 }
1493 if (end_pc > code_length) {
1494 classfile_parse_error(
1495 "Invalid length %u in %s in class file %s",
1496 length, tbl_name, CHECK_NULL);
1497 }
1498 int cp_size = cp->length();
1499 guarantee_property(
1500 valid_cp_range(name_index, cp_size) &&
1501 cp->tag_at(name_index).is_utf8(),
1502 "Name index %u in %s has bad constant type in class file %s",
1503 name_index, tbl_name, CHECK_NULL);
1504 guarantee_property(
1505 valid_cp_range(descriptor_index, cp_size) &&
1506 cp->tag_at(descriptor_index).is_utf8(),
1507 "Signature index %u in %s has bad constant type in class file %s",
1508 descriptor_index, tbl_name, CHECK_NULL);
1510 symbolHandle name(THREAD, cp->symbol_at(name_index));
1511 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index));
1512 verify_legal_field_name(name, CHECK_NULL);
1513 u2 extra_slot = 0;
1514 if (!isLVTT) {
1515 verify_legal_field_signature(name, sig, CHECK_NULL);
1517 // 4894874: check special cases for double and long local variables
1518 if (sig() == vmSymbols::type_signature(T_DOUBLE) ||
1519 sig() == vmSymbols::type_signature(T_LONG)) {
1520 extra_slot = 1;
1521 }
1522 }
1523 guarantee_property((index + extra_slot) < max_locals,
1524 "Invalid index %u in %s in class file %s",
1525 index, tbl_name, CHECK_NULL);
1526 }
1527 }
1528 return localvariable_table_start;
1529 }
1532 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1533 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1534 ClassFileStream* cfs = stream();
1535 u2 index = 0; // index in the array with long/double occupying two slots
1536 u4 i1 = *u1_index;
1537 u4 i2 = *u2_index + 1;
1538 for(int i = 0; i < array_length; i++) {
1539 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1540 index++;
1541 if (tag == ITEM_Long || tag == ITEM_Double) {
1542 index++;
1543 } else if (tag == ITEM_Object) {
1544 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1545 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1546 is_klass_reference(cp, class_index),
1547 "Bad class index %u in StackMap in class file %s",
1548 class_index, CHECK);
1549 } else if (tag == ITEM_Uninitialized) {
1550 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1551 guarantee_property(
1552 offset < code_length,
1553 "Bad uninitialized type offset %u in StackMap in class file %s",
1554 offset, CHECK);
1555 } else {
1556 guarantee_property(
1557 tag <= (u1)ITEM_Uninitialized,
1558 "Unknown variable type %u in StackMap in class file %s",
1559 tag, CHECK);
1560 }
1561 }
1562 u2_array[*u2_index] = index;
1563 *u1_index = i1;
1564 *u2_index = i2;
1565 }
1567 typeArrayOop ClassFileParser::parse_stackmap_table(
1568 u4 code_attribute_length, TRAPS) {
1569 if (code_attribute_length == 0)
1570 return NULL;
1572 ClassFileStream* cfs = stream();
1573 u1* stackmap_table_start = cfs->get_u1_buffer();
1574 assert(stackmap_table_start != NULL, "null stackmap table");
1576 // check code_attribute_length first
1577 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1579 if (!_need_verify && !DumpSharedSpaces) {
1580 return NULL;
1581 }
1583 typeArrayOop stackmap_data =
1584 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1586 stackmap_data->set_length(code_attribute_length);
1587 memcpy((void*)stackmap_data->byte_at_addr(0),
1588 (void*)stackmap_table_start, code_attribute_length);
1589 return stackmap_data;
1590 }
1592 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1593 u4 method_attribute_length,
1594 constantPoolHandle cp, TRAPS) {
1595 ClassFileStream* cfs = stream();
1596 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1597 *checked_exceptions_length = cfs->get_u2_fast();
1598 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1599 u2* checked_exceptions_start = cfs->get_u2_buffer();
1600 assert(checked_exceptions_start != NULL, "null checked exceptions");
1601 if (!_need_verify) {
1602 cfs->skip_u2_fast(size);
1603 } else {
1604 // Verify each value in the checked exception table
1605 u2 checked_exception;
1606 u2 len = *checked_exceptions_length;
1607 cfs->guarantee_more(2 * len, CHECK_NULL);
1608 for (int i = 0; i < len; i++) {
1609 checked_exception = cfs->get_u2_fast();
1610 check_property(
1611 valid_cp_range(checked_exception, cp->length()) &&
1612 is_klass_reference(cp, checked_exception),
1613 "Exception name has bad type at constant pool %u in class file %s",
1614 checked_exception, CHECK_NULL);
1615 }
1616 }
1617 // check exceptions attribute length
1618 if (_need_verify) {
1619 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1620 sizeof(u2) * size),
1621 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1622 }
1623 return checked_exceptions_start;
1624 }
1626 void ClassFileParser::throwIllegalSignature(
1627 const char* type, symbolHandle name, symbolHandle sig, TRAPS) {
1628 ResourceMark rm(THREAD);
1629 Exceptions::fthrow(THREAD_AND_LOCATION,
1630 vmSymbols::java_lang_ClassFormatError(),
1631 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1632 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1633 }
1635 #define MAX_ARGS_SIZE 255
1636 #define MAX_CODE_SIZE 65535
1637 #define INITIAL_MAX_LVT_NUMBER 256
1639 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1640 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1641 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1642 // entire method attribute is parsed.
1643 //
1644 // The promoted_flags parameter is used to pass relevant access_flags
1645 // from the method back up to the containing klass. These flag values
1646 // are added to klass's access_flags.
1648 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1649 AccessFlags *promoted_flags,
1650 typeArrayHandle* method_annotations,
1651 typeArrayHandle* method_parameter_annotations,
1652 typeArrayHandle* method_default_annotations,
1653 TRAPS) {
1654 ClassFileStream* cfs = stream();
1655 methodHandle nullHandle;
1656 ResourceMark rm(THREAD);
1657 // Parse fixed parts
1658 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1660 int flags = cfs->get_u2_fast();
1661 u2 name_index = cfs->get_u2_fast();
1662 int cp_size = cp->length();
1663 check_property(
1664 valid_cp_range(name_index, cp_size) &&
1665 cp->tag_at(name_index).is_utf8(),
1666 "Illegal constant pool index %u for method name in class file %s",
1667 name_index, CHECK_(nullHandle));
1668 symbolHandle name(THREAD, cp->symbol_at(name_index));
1669 verify_legal_method_name(name, CHECK_(nullHandle));
1671 u2 signature_index = cfs->get_u2_fast();
1672 guarantee_property(
1673 valid_cp_range(signature_index, cp_size) &&
1674 cp->tag_at(signature_index).is_utf8(),
1675 "Illegal constant pool index %u for method signature in class file %s",
1676 signature_index, CHECK_(nullHandle));
1677 symbolHandle signature(THREAD, cp->symbol_at(signature_index));
1679 AccessFlags access_flags;
1680 if (name == vmSymbols::class_initializer_name()) {
1681 // We ignore the access flags for a class initializer. (JVM Spec. p. 116)
1682 flags = JVM_ACC_STATIC;
1683 } else {
1684 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1685 }
1687 int args_size = -1; // only used when _need_verify is true
1688 if (_need_verify) {
1689 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1690 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1691 if (args_size > MAX_ARGS_SIZE) {
1692 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1693 }
1694 }
1696 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1698 // Default values for code and exceptions attribute elements
1699 u2 max_stack = 0;
1700 u2 max_locals = 0;
1701 u4 code_length = 0;
1702 u1* code_start = 0;
1703 u2 exception_table_length = 0;
1704 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1705 u2 checked_exceptions_length = 0;
1706 u2* checked_exceptions_start = NULL;
1707 CompressedLineNumberWriteStream* linenumber_table = NULL;
1708 int linenumber_table_length = 0;
1709 int total_lvt_length = 0;
1710 u2 lvt_cnt = 0;
1711 u2 lvtt_cnt = 0;
1712 bool lvt_allocated = false;
1713 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1714 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1715 u2* localvariable_table_length;
1716 u2** localvariable_table_start;
1717 u2* localvariable_type_table_length;
1718 u2** localvariable_type_table_start;
1719 bool parsed_code_attribute = false;
1720 bool parsed_checked_exceptions_attribute = false;
1721 bool parsed_stackmap_attribute = false;
1722 // stackmap attribute - JDK1.5
1723 typeArrayHandle stackmap_data;
1724 u2 generic_signature_index = 0;
1725 u1* runtime_visible_annotations = NULL;
1726 int runtime_visible_annotations_length = 0;
1727 u1* runtime_invisible_annotations = NULL;
1728 int runtime_invisible_annotations_length = 0;
1729 u1* runtime_visible_parameter_annotations = NULL;
1730 int runtime_visible_parameter_annotations_length = 0;
1731 u1* runtime_invisible_parameter_annotations = NULL;
1732 int runtime_invisible_parameter_annotations_length = 0;
1733 u1* annotation_default = NULL;
1734 int annotation_default_length = 0;
1736 // Parse code and exceptions attribute
1737 u2 method_attributes_count = cfs->get_u2_fast();
1738 while (method_attributes_count--) {
1739 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1740 u2 method_attribute_name_index = cfs->get_u2_fast();
1741 u4 method_attribute_length = cfs->get_u4_fast();
1742 check_property(
1743 valid_cp_range(method_attribute_name_index, cp_size) &&
1744 cp->tag_at(method_attribute_name_index).is_utf8(),
1745 "Invalid method attribute name index %u in class file %s",
1746 method_attribute_name_index, CHECK_(nullHandle));
1748 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index);
1749 if (method_attribute_name == vmSymbols::tag_code()) {
1750 // Parse Code attribute
1751 if (_need_verify) {
1752 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1753 "Code attribute in native or abstract methods in class file %s",
1754 CHECK_(nullHandle));
1755 }
1756 if (parsed_code_attribute) {
1757 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1758 }
1759 parsed_code_attribute = true;
1761 // Stack size, locals size, and code size
1762 if (_major_version == 45 && _minor_version <= 2) {
1763 cfs->guarantee_more(4, CHECK_(nullHandle));
1764 max_stack = cfs->get_u1_fast();
1765 max_locals = cfs->get_u1_fast();
1766 code_length = cfs->get_u2_fast();
1767 } else {
1768 cfs->guarantee_more(8, CHECK_(nullHandle));
1769 max_stack = cfs->get_u2_fast();
1770 max_locals = cfs->get_u2_fast();
1771 code_length = cfs->get_u4_fast();
1772 }
1773 if (_need_verify) {
1774 guarantee_property(args_size <= max_locals,
1775 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1776 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1777 "Invalid method Code length %u in class file %s",
1778 code_length, CHECK_(nullHandle));
1779 }
1780 // Code pointer
1781 code_start = cfs->get_u1_buffer();
1782 assert(code_start != NULL, "null code start");
1783 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1784 cfs->skip_u1_fast(code_length);
1786 // Exception handler table
1787 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1788 exception_table_length = cfs->get_u2_fast();
1789 if (exception_table_length > 0) {
1790 exception_handlers =
1791 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1792 }
1794 // Parse additional attributes in code attribute
1795 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1796 u2 code_attributes_count = cfs->get_u2_fast();
1798 unsigned int calculated_attribute_length = 0;
1800 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1801 calculated_attribute_length =
1802 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1803 } else {
1804 // max_stack, locals and length are smaller in pre-version 45.2 classes
1805 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1806 }
1807 calculated_attribute_length +=
1808 code_length +
1809 sizeof(exception_table_length) +
1810 sizeof(code_attributes_count) +
1811 exception_table_length *
1812 ( sizeof(u2) + // start_pc
1813 sizeof(u2) + // end_pc
1814 sizeof(u2) + // handler_pc
1815 sizeof(u2) ); // catch_type_index
1817 while (code_attributes_count--) {
1818 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1819 u2 code_attribute_name_index = cfs->get_u2_fast();
1820 u4 code_attribute_length = cfs->get_u4_fast();
1821 calculated_attribute_length += code_attribute_length +
1822 sizeof(code_attribute_name_index) +
1823 sizeof(code_attribute_length);
1824 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1825 cp->tag_at(code_attribute_name_index).is_utf8(),
1826 "Invalid code attribute name index %u in class file %s",
1827 code_attribute_name_index,
1828 CHECK_(nullHandle));
1829 if (LoadLineNumberTables &&
1830 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1831 // Parse and compress line number table
1832 parse_linenumber_table(code_attribute_length, code_length,
1833 &linenumber_table, CHECK_(nullHandle));
1835 } else if (LoadLocalVariableTables &&
1836 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1837 // Parse local variable table
1838 if (!lvt_allocated) {
1839 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1840 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1841 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1842 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1843 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1844 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1845 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1846 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1847 lvt_allocated = true;
1848 }
1849 if (lvt_cnt == max_lvt_cnt) {
1850 max_lvt_cnt <<= 1;
1851 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1852 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1853 }
1854 localvariable_table_start[lvt_cnt] =
1855 parse_localvariable_table(code_length,
1856 max_locals,
1857 code_attribute_length,
1858 cp,
1859 &localvariable_table_length[lvt_cnt],
1860 false, // is not LVTT
1861 CHECK_(nullHandle));
1862 total_lvt_length += localvariable_table_length[lvt_cnt];
1863 lvt_cnt++;
1864 } else if (LoadLocalVariableTypeTables &&
1865 _major_version >= JAVA_1_5_VERSION &&
1866 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1867 if (!lvt_allocated) {
1868 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1869 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1870 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1871 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1872 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1873 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1874 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1875 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1876 lvt_allocated = true;
1877 }
1878 // Parse local variable type table
1879 if (lvtt_cnt == max_lvtt_cnt) {
1880 max_lvtt_cnt <<= 1;
1881 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1882 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1883 }
1884 localvariable_type_table_start[lvtt_cnt] =
1885 parse_localvariable_table(code_length,
1886 max_locals,
1887 code_attribute_length,
1888 cp,
1889 &localvariable_type_table_length[lvtt_cnt],
1890 true, // is LVTT
1891 CHECK_(nullHandle));
1892 lvtt_cnt++;
1893 } else if (UseSplitVerifier &&
1894 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1895 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1896 // Stack map is only needed by the new verifier in JDK1.5.
1897 if (parsed_stackmap_attribute) {
1898 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1899 }
1900 typeArrayOop sm =
1901 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1902 stackmap_data = typeArrayHandle(THREAD, sm);
1903 parsed_stackmap_attribute = true;
1904 } else {
1905 // Skip unknown attributes
1906 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1907 }
1908 }
1909 // check method attribute length
1910 if (_need_verify) {
1911 guarantee_property(method_attribute_length == calculated_attribute_length,
1912 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1913 }
1914 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1915 // Parse Exceptions attribute
1916 if (parsed_checked_exceptions_attribute) {
1917 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1918 }
1919 parsed_checked_exceptions_attribute = true;
1920 checked_exceptions_start =
1921 parse_checked_exceptions(&checked_exceptions_length,
1922 method_attribute_length,
1923 cp, CHECK_(nullHandle));
1924 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1925 if (method_attribute_length != 0) {
1926 classfile_parse_error(
1927 "Invalid Synthetic method attribute length %u in class file %s",
1928 method_attribute_length, CHECK_(nullHandle));
1929 }
1930 // Should we check that there hasn't already been a synthetic attribute?
1931 access_flags.set_is_synthetic();
1932 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1933 if (method_attribute_length != 0) {
1934 classfile_parse_error(
1935 "Invalid Deprecated method attribute length %u in class file %s",
1936 method_attribute_length, CHECK_(nullHandle));
1937 }
1938 } else if (_major_version >= JAVA_1_5_VERSION) {
1939 if (method_attribute_name == vmSymbols::tag_signature()) {
1940 if (method_attribute_length != 2) {
1941 classfile_parse_error(
1942 "Invalid Signature attribute length %u in class file %s",
1943 method_attribute_length, CHECK_(nullHandle));
1944 }
1945 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
1946 generic_signature_index = cfs->get_u2_fast();
1947 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1948 runtime_visible_annotations_length = method_attribute_length;
1949 runtime_visible_annotations = cfs->get_u1_buffer();
1950 assert(runtime_visible_annotations != NULL, "null visible annotations");
1951 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1952 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1953 runtime_invisible_annotations_length = method_attribute_length;
1954 runtime_invisible_annotations = cfs->get_u1_buffer();
1955 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1956 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1957 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1958 runtime_visible_parameter_annotations_length = method_attribute_length;
1959 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1960 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1961 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1962 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1963 runtime_invisible_parameter_annotations_length = method_attribute_length;
1964 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1965 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1966 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1967 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1968 annotation_default_length = method_attribute_length;
1969 annotation_default = cfs->get_u1_buffer();
1970 assert(annotation_default != NULL, "null annotation default");
1971 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1972 } else {
1973 // Skip unknown attributes
1974 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1975 }
1976 } else {
1977 // Skip unknown attributes
1978 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1979 }
1980 }
1982 if (linenumber_table != NULL) {
1983 linenumber_table->write_terminator();
1984 linenumber_table_length = linenumber_table->position();
1985 }
1987 // Make sure there's at least one Code attribute in non-native/non-abstract method
1988 if (_need_verify) {
1989 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
1990 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
1991 }
1993 // All sizing information for a methodOop is finally available, now create it
1994 methodOop m_oop = oopFactory::new_method(
1995 code_length, access_flags, linenumber_table_length,
1996 total_lvt_length, checked_exceptions_length,
1997 methodOopDesc::IsSafeConc, CHECK_(nullHandle));
1998 methodHandle m (THREAD, m_oop);
2000 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
2002 // Fill in information from fixed part (access_flags already set)
2003 m->set_constants(cp());
2004 m->set_name_index(name_index);
2005 m->set_signature_index(signature_index);
2006 m->set_generic_signature_index(generic_signature_index);
2007 #ifdef CC_INTERP
2008 // hmm is there a gc issue here??
2009 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2010 m->set_result_index(rtf.type());
2011 #endif
2013 if (args_size >= 0) {
2014 m->set_size_of_parameters(args_size);
2015 } else {
2016 m->compute_size_of_parameters(THREAD);
2017 }
2018 #ifdef ASSERT
2019 if (args_size >= 0) {
2020 m->compute_size_of_parameters(THREAD);
2021 assert(args_size == m->size_of_parameters(), "");
2022 }
2023 #endif
2025 // Fill in code attribute information
2026 m->set_max_stack(max_stack);
2027 m->set_max_locals(max_locals);
2028 m->constMethod()->set_stackmap_data(stackmap_data());
2030 /**
2031 * The exception_table field is the flag used to indicate
2032 * that the methodOop and it's associated constMethodOop are partially
2033 * initialized and thus are exempt from pre/post GC verification. Once
2034 * the field is set, the oops are considered fully initialized so make
2035 * sure that the oops can pass verification when this field is set.
2036 */
2037 m->set_exception_table(exception_handlers());
2039 // Copy byte codes
2040 m->set_code(code_start);
2042 // Copy line number table
2043 if (linenumber_table != NULL) {
2044 memcpy(m->compressed_linenumber_table(),
2045 linenumber_table->buffer(), linenumber_table_length);
2046 }
2048 // Copy checked exceptions
2049 if (checked_exceptions_length > 0) {
2050 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2051 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2052 }
2054 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2055 *
2056 * Rules for LVT's and LVTT's are:
2057 * - There can be any number of LVT's and LVTT's.
2058 * - If there are n LVT's, it is the same as if there was just
2059 * one LVT containing all the entries from the n LVT's.
2060 * - There may be no more than one LVT entry per local variable.
2061 * Two LVT entries are 'equal' if these fields are the same:
2062 * start_pc, length, name, slot
2063 * - There may be no more than one LVTT entry per each LVT entry.
2064 * Each LVTT entry has to match some LVT entry.
2065 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2066 */
2067 if (total_lvt_length > 0) {
2068 int tbl_no, idx;
2070 promoted_flags->set_has_localvariable_table();
2072 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2073 initialize_hashtable(lvt_Hash);
2075 // To fill LocalVariableTable in
2076 Classfile_LVT_Element* cf_lvt;
2077 LocalVariableTableElement* lvt = m->localvariable_table_start();
2079 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2080 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2081 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2082 copy_lvt_element(&cf_lvt[idx], lvt);
2083 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2084 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2085 && _need_verify
2086 && _major_version >= JAVA_1_5_VERSION ) {
2087 clear_hashtable(lvt_Hash);
2088 classfile_parse_error("Duplicated LocalVariableTable attribute "
2089 "entry for '%s' in class file %s",
2090 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2091 CHECK_(nullHandle));
2092 }
2093 }
2094 }
2096 // To merge LocalVariableTable and LocalVariableTypeTable
2097 Classfile_LVT_Element* cf_lvtt;
2098 LocalVariableTableElement lvtt_elem;
2100 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2101 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2102 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2103 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2104 int index = hash(&lvtt_elem);
2105 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2106 if (entry == NULL) {
2107 if (_need_verify) {
2108 clear_hashtable(lvt_Hash);
2109 classfile_parse_error("LVTT entry for '%s' in class file %s "
2110 "does not match any LVT entry",
2111 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2112 CHECK_(nullHandle));
2113 }
2114 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2115 clear_hashtable(lvt_Hash);
2116 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2117 "entry for '%s' in class file %s",
2118 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2119 CHECK_(nullHandle));
2120 } else {
2121 // to add generic signatures into LocalVariableTable
2122 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2123 }
2124 }
2125 }
2126 clear_hashtable(lvt_Hash);
2127 }
2129 *method_annotations = assemble_annotations(runtime_visible_annotations,
2130 runtime_visible_annotations_length,
2131 runtime_invisible_annotations,
2132 runtime_invisible_annotations_length,
2133 CHECK_(nullHandle));
2134 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
2135 runtime_visible_parameter_annotations_length,
2136 runtime_invisible_parameter_annotations,
2137 runtime_invisible_parameter_annotations_length,
2138 CHECK_(nullHandle));
2139 *method_default_annotations = assemble_annotations(annotation_default,
2140 annotation_default_length,
2141 NULL,
2142 0,
2143 CHECK_(nullHandle));
2145 if (name() == vmSymbols::finalize_method_name() &&
2146 signature() == vmSymbols::void_method_signature()) {
2147 if (m->is_empty_method()) {
2148 _has_empty_finalizer = true;
2149 } else {
2150 _has_finalizer = true;
2151 }
2152 }
2153 if (name() == vmSymbols::object_initializer_name() &&
2154 signature() == vmSymbols::void_method_signature() &&
2155 m->is_vanilla_constructor()) {
2156 _has_vanilla_constructor = true;
2157 }
2159 if (EnableMethodHandles && (m->is_method_handle_invoke() ||
2160 m->is_method_handle_adapter())) {
2161 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
2162 "Method handle invokers must be defined internally to the VM", nullHandle);
2163 }
2165 return m;
2166 }
2169 // The promoted_flags parameter is used to pass relevant access_flags
2170 // from the methods back up to the containing klass. These flag values
2171 // are added to klass's access_flags.
2173 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
2174 AccessFlags* promoted_flags,
2175 bool* has_final_method,
2176 objArrayOop* methods_annotations_oop,
2177 objArrayOop* methods_parameter_annotations_oop,
2178 objArrayOop* methods_default_annotations_oop,
2179 TRAPS) {
2180 ClassFileStream* cfs = stream();
2181 objArrayHandle nullHandle;
2182 typeArrayHandle method_annotations;
2183 typeArrayHandle method_parameter_annotations;
2184 typeArrayHandle method_default_annotations;
2185 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
2186 u2 length = cfs->get_u2_fast();
2187 if (length == 0) {
2188 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2189 } else {
2190 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2191 objArrayHandle methods(THREAD, m);
2192 HandleMark hm(THREAD);
2193 objArrayHandle methods_annotations;
2194 objArrayHandle methods_parameter_annotations;
2195 objArrayHandle methods_default_annotations;
2196 for (int index = 0; index < length; index++) {
2197 methodHandle method = parse_method(cp, is_interface,
2198 promoted_flags,
2199 &method_annotations,
2200 &method_parameter_annotations,
2201 &method_default_annotations,
2202 CHECK_(nullHandle));
2203 if (method->is_final()) {
2204 *has_final_method = true;
2205 }
2206 methods->obj_at_put(index, method());
2207 if (method_annotations.not_null()) {
2208 if (methods_annotations.is_null()) {
2209 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2210 methods_annotations = objArrayHandle(THREAD, md);
2211 }
2212 methods_annotations->obj_at_put(index, method_annotations());
2213 }
2214 if (method_parameter_annotations.not_null()) {
2215 if (methods_parameter_annotations.is_null()) {
2216 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2217 methods_parameter_annotations = objArrayHandle(THREAD, md);
2218 }
2219 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
2220 }
2221 if (method_default_annotations.not_null()) {
2222 if (methods_default_annotations.is_null()) {
2223 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2224 methods_default_annotations = objArrayHandle(THREAD, md);
2225 }
2226 methods_default_annotations->obj_at_put(index, method_default_annotations());
2227 }
2228 }
2229 if (_need_verify && length > 1) {
2230 // Check duplicated methods
2231 ResourceMark rm(THREAD);
2232 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2233 THREAD, NameSigHash*, HASH_ROW_SIZE);
2234 initialize_hashtable(names_and_sigs);
2235 bool dup = false;
2236 {
2237 debug_only(No_Safepoint_Verifier nsv;)
2238 for (int i = 0; i < length; i++) {
2239 methodOop m = (methodOop)methods->obj_at(i);
2240 // If no duplicates, add name/signature in hashtable names_and_sigs.
2241 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2242 dup = true;
2243 break;
2244 }
2245 }
2246 }
2247 if (dup) {
2248 classfile_parse_error("Duplicate method name&signature in class file %s",
2249 CHECK_(nullHandle));
2250 }
2251 }
2253 *methods_annotations_oop = methods_annotations();
2254 *methods_parameter_annotations_oop = methods_parameter_annotations();
2255 *methods_default_annotations_oop = methods_default_annotations();
2257 return methods;
2258 }
2259 }
2262 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
2263 objArrayHandle methods_annotations,
2264 objArrayHandle methods_parameter_annotations,
2265 objArrayHandle methods_default_annotations,
2266 TRAPS) {
2267 typeArrayHandle nullHandle;
2268 int length = methods()->length();
2269 // If JVMTI original method ordering is enabled we have to
2270 // remember the original class file ordering.
2271 // We temporarily use the vtable_index field in the methodOop to store the
2272 // class file index, so we can read in after calling qsort.
2273 if (JvmtiExport::can_maintain_original_method_order()) {
2274 for (int index = 0; index < length; index++) {
2275 methodOop m = methodOop(methods->obj_at(index));
2276 assert(!m->valid_vtable_index(), "vtable index should not be set");
2277 m->set_vtable_index(index);
2278 }
2279 }
2280 // Sort method array by ascending method name (for faster lookups & vtable construction)
2281 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare
2282 methodOopDesc::sort_methods(methods(),
2283 methods_annotations(),
2284 methods_parameter_annotations(),
2285 methods_default_annotations());
2287 // If JVMTI original method ordering is enabled construct int array remembering the original ordering
2288 if (JvmtiExport::can_maintain_original_method_order()) {
2289 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
2290 typeArrayHandle method_ordering(THREAD, new_ordering);
2291 for (int index = 0; index < length; index++) {
2292 methodOop m = methodOop(methods->obj_at(index));
2293 int old_index = m->vtable_index();
2294 assert(old_index >= 0 && old_index < length, "invalid method index");
2295 method_ordering->int_at_put(index, old_index);
2296 m->set_vtable_index(methodOopDesc::invalid_vtable_index);
2297 }
2298 return method_ordering;
2299 } else {
2300 return typeArrayHandle(THREAD, Universe::the_empty_int_array());
2301 }
2302 }
2305 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2306 ClassFileStream* cfs = stream();
2307 cfs->guarantee_more(2, CHECK); // sourcefile_index
2308 u2 sourcefile_index = cfs->get_u2_fast();
2309 check_property(
2310 valid_cp_range(sourcefile_index, cp->length()) &&
2311 cp->tag_at(sourcefile_index).is_utf8(),
2312 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2313 sourcefile_index, CHECK);
2314 k->set_source_file_name(cp->symbol_at(sourcefile_index));
2315 }
2319 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2320 instanceKlassHandle k,
2321 int length, TRAPS) {
2322 ClassFileStream* cfs = stream();
2323 u1* sde_buffer = cfs->get_u1_buffer();
2324 assert(sde_buffer != NULL, "null sde buffer");
2326 // Don't bother storing it if there is no way to retrieve it
2327 if (JvmtiExport::can_get_source_debug_extension()) {
2328 // Optimistically assume that only 1 byte UTF format is used
2329 // (common case)
2330 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer,
2331 length, CHECK);
2332 k->set_source_debug_extension(sde_symbol);
2333 }
2334 // Got utf8 string, set stream position forward
2335 cfs->skip_u1(length, CHECK);
2336 }
2339 // Inner classes can be static, private or protected (classic VM does this)
2340 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2342 // Return number of classes in the inner classes attribute table
2343 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2344 ClassFileStream* cfs = stream();
2345 cfs->guarantee_more(2, CHECK_0); // length
2346 u2 length = cfs->get_u2_fast();
2348 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
2349 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);
2350 typeArrayHandle inner_classes(THREAD, ic);
2351 int index = 0;
2352 int cp_size = cp->length();
2353 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2354 for (int n = 0; n < length; n++) {
2355 // Inner class index
2356 u2 inner_class_info_index = cfs->get_u2_fast();
2357 check_property(
2358 inner_class_info_index == 0 ||
2359 (valid_cp_range(inner_class_info_index, cp_size) &&
2360 is_klass_reference(cp, inner_class_info_index)),
2361 "inner_class_info_index %u has bad constant type in class file %s",
2362 inner_class_info_index, CHECK_0);
2363 // Outer class index
2364 u2 outer_class_info_index = cfs->get_u2_fast();
2365 check_property(
2366 outer_class_info_index == 0 ||
2367 (valid_cp_range(outer_class_info_index, cp_size) &&
2368 is_klass_reference(cp, outer_class_info_index)),
2369 "outer_class_info_index %u has bad constant type in class file %s",
2370 outer_class_info_index, CHECK_0);
2371 // Inner class name
2372 u2 inner_name_index = cfs->get_u2_fast();
2373 check_property(
2374 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2375 cp->tag_at(inner_name_index).is_utf8()),
2376 "inner_name_index %u has bad constant type in class file %s",
2377 inner_name_index, CHECK_0);
2378 if (_need_verify) {
2379 guarantee_property(inner_class_info_index != outer_class_info_index,
2380 "Class is both outer and inner class in class file %s", CHECK_0);
2381 }
2382 // Access flags
2383 AccessFlags inner_access_flags;
2384 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2385 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2386 // Set abstract bit for old class files for backward compatibility
2387 flags |= JVM_ACC_ABSTRACT;
2388 }
2389 verify_legal_class_modifiers(flags, CHECK_0);
2390 inner_access_flags.set_flags(flags);
2392 inner_classes->short_at_put(index++, inner_class_info_index);
2393 inner_classes->short_at_put(index++, outer_class_info_index);
2394 inner_classes->short_at_put(index++, inner_name_index);
2395 inner_classes->short_at_put(index++, inner_access_flags.as_short());
2396 }
2398 // 4347400: make sure there's no duplicate entry in the classes array
2399 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2400 for(int i = 0; i < inner_classes->length(); i += 4) {
2401 for(int j = i + 4; j < inner_classes->length(); j += 4) {
2402 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
2403 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2404 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2405 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2406 "Duplicate entry in InnerClasses in class file %s",
2407 CHECK_0);
2408 }
2409 }
2410 }
2412 // Update instanceKlass with inner class info.
2413 k->set_inner_classes(inner_classes());
2414 return length;
2415 }
2417 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2418 k->set_is_synthetic();
2419 }
2421 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2422 ClassFileStream* cfs = stream();
2423 u2 signature_index = cfs->get_u2(CHECK);
2424 check_property(
2425 valid_cp_range(signature_index, cp->length()) &&
2426 cp->tag_at(signature_index).is_utf8(),
2427 "Invalid constant pool index %u in Signature attribute in class file %s",
2428 signature_index, CHECK);
2429 k->set_generic_signature(cp->symbol_at(signature_index));
2430 }
2432 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2433 ClassFileStream* cfs = stream();
2434 // Set inner classes attribute to default sentinel
2435 k->set_inner_classes(Universe::the_empty_short_array());
2436 cfs->guarantee_more(2, CHECK); // attributes_count
2437 u2 attributes_count = cfs->get_u2_fast();
2438 bool parsed_sourcefile_attribute = false;
2439 bool parsed_innerclasses_attribute = false;
2440 bool parsed_enclosingmethod_attribute = false;
2441 u1* runtime_visible_annotations = NULL;
2442 int runtime_visible_annotations_length = 0;
2443 u1* runtime_invisible_annotations = NULL;
2444 int runtime_invisible_annotations_length = 0;
2445 // Iterate over attributes
2446 while (attributes_count--) {
2447 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2448 u2 attribute_name_index = cfs->get_u2_fast();
2449 u4 attribute_length = cfs->get_u4_fast();
2450 check_property(
2451 valid_cp_range(attribute_name_index, cp->length()) &&
2452 cp->tag_at(attribute_name_index).is_utf8(),
2453 "Attribute name has bad constant pool index %u in class file %s",
2454 attribute_name_index, CHECK);
2455 symbolOop tag = cp->symbol_at(attribute_name_index);
2456 if (tag == vmSymbols::tag_source_file()) {
2457 // Check for SourceFile tag
2458 if (_need_verify) {
2459 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2460 }
2461 if (parsed_sourcefile_attribute) {
2462 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2463 } else {
2464 parsed_sourcefile_attribute = true;
2465 }
2466 parse_classfile_sourcefile_attribute(cp, k, CHECK);
2467 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2468 // Check for SourceDebugExtension tag
2469 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
2470 } else if (tag == vmSymbols::tag_inner_classes()) {
2471 // Check for InnerClasses tag
2472 if (parsed_innerclasses_attribute) {
2473 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2474 } else {
2475 parsed_innerclasses_attribute = true;
2476 }
2477 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
2478 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2479 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2480 "Wrong InnerClasses attribute length in class file %s", CHECK);
2481 }
2482 } else if (tag == vmSymbols::tag_synthetic()) {
2483 // Check for Synthetic tag
2484 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2485 if (attribute_length != 0) {
2486 classfile_parse_error(
2487 "Invalid Synthetic classfile attribute length %u in class file %s",
2488 attribute_length, CHECK);
2489 }
2490 parse_classfile_synthetic_attribute(cp, k, CHECK);
2491 } else if (tag == vmSymbols::tag_deprecated()) {
2492 // Check for Deprecatd tag - 4276120
2493 if (attribute_length != 0) {
2494 classfile_parse_error(
2495 "Invalid Deprecated classfile attribute length %u in class file %s",
2496 attribute_length, CHECK);
2497 }
2498 } else if (_major_version >= JAVA_1_5_VERSION) {
2499 if (tag == vmSymbols::tag_signature()) {
2500 if (attribute_length != 2) {
2501 classfile_parse_error(
2502 "Wrong Signature attribute length %u in class file %s",
2503 attribute_length, CHECK);
2504 }
2505 parse_classfile_signature_attribute(cp, k, CHECK);
2506 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2507 runtime_visible_annotations_length = attribute_length;
2508 runtime_visible_annotations = cfs->get_u1_buffer();
2509 assert(runtime_visible_annotations != NULL, "null visible annotations");
2510 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2511 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2512 runtime_invisible_annotations_length = attribute_length;
2513 runtime_invisible_annotations = cfs->get_u1_buffer();
2514 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2515 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2516 } else if (tag == vmSymbols::tag_enclosing_method()) {
2517 if (parsed_enclosingmethod_attribute) {
2518 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2519 } else {
2520 parsed_enclosingmethod_attribute = true;
2521 }
2522 cfs->guarantee_more(4, CHECK); // class_index, method_index
2523 u2 class_index = cfs->get_u2_fast();
2524 u2 method_index = cfs->get_u2_fast();
2525 if (class_index == 0) {
2526 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2527 }
2528 // Validate the constant pool indices and types
2529 if (!cp->is_within_bounds(class_index) ||
2530 !is_klass_reference(cp, class_index)) {
2531 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2532 }
2533 if (method_index != 0 &&
2534 (!cp->is_within_bounds(method_index) ||
2535 !cp->tag_at(method_index).is_name_and_type())) {
2536 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2537 }
2538 k->set_enclosing_method_indices(class_index, method_index);
2539 } else {
2540 // Unknown attribute
2541 cfs->skip_u1(attribute_length, CHECK);
2542 }
2543 } else {
2544 // Unknown attribute
2545 cfs->skip_u1(attribute_length, CHECK);
2546 }
2547 }
2548 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2549 runtime_visible_annotations_length,
2550 runtime_invisible_annotations,
2551 runtime_invisible_annotations_length,
2552 CHECK);
2553 k->set_class_annotations(annotations());
2554 }
2557 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2558 int runtime_visible_annotations_length,
2559 u1* runtime_invisible_annotations,
2560 int runtime_invisible_annotations_length, TRAPS) {
2561 typeArrayHandle annotations;
2562 if (runtime_visible_annotations != NULL ||
2563 runtime_invisible_annotations != NULL) {
2564 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2565 runtime_invisible_annotations_length, CHECK_(annotations));
2566 annotations = typeArrayHandle(THREAD, anno);
2567 if (runtime_visible_annotations != NULL) {
2568 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2569 }
2570 if (runtime_invisible_annotations != NULL) {
2571 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2572 }
2573 }
2574 return annotations;
2575 }
2578 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
2579 KlassHandle h_k (THREAD, fd->field_holder());
2580 assert(h_k.not_null() && fd->is_static(), "just checking");
2581 if (fd->has_initial_value()) {
2582 BasicType t = fd->field_type();
2583 switch (t) {
2584 case T_BYTE:
2585 h_k()->byte_field_put(fd->offset(), fd->int_initial_value());
2586 break;
2587 case T_BOOLEAN:
2588 h_k()->bool_field_put(fd->offset(), fd->int_initial_value());
2589 break;
2590 case T_CHAR:
2591 h_k()->char_field_put(fd->offset(), fd->int_initial_value());
2592 break;
2593 case T_SHORT:
2594 h_k()->short_field_put(fd->offset(), fd->int_initial_value());
2595 break;
2596 case T_INT:
2597 h_k()->int_field_put(fd->offset(), fd->int_initial_value());
2598 break;
2599 case T_FLOAT:
2600 h_k()->float_field_put(fd->offset(), fd->float_initial_value());
2601 break;
2602 case T_DOUBLE:
2603 h_k()->double_field_put(fd->offset(), fd->double_initial_value());
2604 break;
2605 case T_LONG:
2606 h_k()->long_field_put(fd->offset(), fd->long_initial_value());
2607 break;
2608 case T_OBJECT:
2609 {
2610 #ifdef ASSERT
2611 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK);
2612 assert(fd->signature() == sym, "just checking");
2613 #endif
2614 oop string = fd->string_initial_value(CHECK);
2615 h_k()->obj_field_put(fd->offset(), string);
2616 }
2617 break;
2618 default:
2619 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
2620 "Illegal ConstantValue attribute in class file");
2621 }
2622 }
2623 }
2626 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
2627 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) {
2628 // This code is for compatibility with earlier jdk's that do not
2629 // have the "discovered" field in java.lang.ref.Reference. For 1.5
2630 // the check for the "discovered" field should issue a warning if
2631 // the field is not found. For 1.6 this code should be issue a
2632 // fatal error if the "discovered" field is not found.
2633 //
2634 // Increment fac.nonstatic_oop_count so that the start of the
2635 // next type of non-static oops leaves room for the fake oop.
2636 // Do not increment next_nonstatic_oop_offset so that the
2637 // fake oop is place after the java.lang.ref.Reference oop
2638 // fields.
2639 //
2640 // Check the fields in java.lang.ref.Reference for the "discovered"
2641 // field. If it is not present, artifically create a field for it.
2642 // This allows this VM to run on early JDK where the field is not
2643 // present.
2644 int reference_sig_index = 0;
2645 int reference_name_index = 0;
2646 int reference_index = 0;
2647 int extra = java_lang_ref_Reference::number_of_fake_oop_fields;
2648 const int n = (*fields_ptr)()->length();
2649 for (int i = 0; i < n; i += instanceKlass::next_offset ) {
2650 int name_index =
2651 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset);
2652 int sig_index =
2653 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset);
2654 symbolOop f_name = cp->symbol_at(name_index);
2655 symbolOop f_sig = cp->symbol_at(sig_index);
2656 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) {
2657 // Save the index for reference signature for later use.
2658 // The fake discovered field does not entries in the
2659 // constant pool so the index for its signature cannot
2660 // be extracted from the constant pool. It will need
2661 // later, however. It's signature is vmSymbols::reference_signature()
2662 // so same an index for that signature.
2663 reference_sig_index = sig_index;
2664 reference_name_index = name_index;
2665 reference_index = i;
2666 }
2667 if (f_name == vmSymbols::reference_discovered_name() &&
2668 f_sig == vmSymbols::reference_signature()) {
2669 // The values below are fake but will force extra
2670 // non-static oop fields and a corresponding non-static
2671 // oop map block to be allocated.
2672 extra = 0;
2673 break;
2674 }
2675 }
2676 if (extra != 0) {
2677 fac_ptr->nonstatic_oop_count += extra;
2678 // Add the additional entry to "fields" so that the klass
2679 // contains the "discoverd" field and the field will be initialized
2680 // in instances of the object.
2681 int fields_with_fix_length = (*fields_ptr)()->length() +
2682 instanceKlass::next_offset;
2683 typeArrayOop ff = oopFactory::new_permanent_shortArray(
2684 fields_with_fix_length, CHECK);
2685 typeArrayHandle fields_with_fix(THREAD, ff);
2687 // Take everything from the original but the length.
2688 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) {
2689 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx));
2690 }
2692 // Add the fake field at the end.
2693 int i = (*fields_ptr)->length();
2694 // There is no name index for the fake "discovered" field nor
2695 // signature but a signature is needed so that the field will
2696 // be properly initialized. Use one found for
2697 // one of the other reference fields. Be sure the index for the
2698 // name is 0. In fieldDescriptor::initialize() the index of the
2699 // name is checked. That check is by passed for the last nonstatic
2700 // oop field in a java.lang.ref.Reference which is assumed to be
2701 // this artificial "discovered" field. An assertion checks that
2702 // the name index is 0.
2703 assert(reference_index != 0, "Missing signature for reference");
2705 int j;
2706 for (j = 0; j < instanceKlass::next_offset; j++) {
2707 fields_with_fix->ushort_at_put(i + j,
2708 (*fields_ptr)->ushort_at(reference_index +j));
2709 }
2710 // Clear the public access flag and set the private access flag.
2711 short flags;
2712 flags =
2713 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset);
2714 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set");
2715 flags = flags & (~JVM_ACC_PUBLIC);
2716 flags = flags | JVM_ACC_PRIVATE;
2717 AccessFlags access_flags;
2718 access_flags.set_flags(flags);
2719 assert(!access_flags.is_public(), "Failed to clear public flag");
2720 assert(access_flags.is_private(), "Failed to set private flag");
2721 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset,
2722 flags);
2724 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset)
2725 == reference_name_index, "The fake reference name is incorrect");
2726 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset)
2727 == reference_sig_index, "The fake reference signature is incorrect");
2728 // The type of the field is stored in the low_offset entry during
2729 // parsing.
2730 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) ==
2731 NONSTATIC_OOP, "The fake reference type is incorrect");
2733 // "fields" is allocated in the permanent generation. Disgard
2734 // it and let it be collected.
2735 (*fields_ptr) = fields_with_fix;
2736 }
2737 return;
2738 }
2741 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
2742 FieldAllocationCount *fac_ptr, TRAPS) {
2743 // Add fake fields for java.lang.Class instances
2744 //
2745 // This is not particularly nice. We should consider adding a
2746 // private transient object field at the Java level to
2747 // java.lang.Class. Alternatively we could add a subclass of
2748 // instanceKlass which provides an accessor and size computer for
2749 // this field, but that appears to be more code than this hack.
2750 //
2751 // NOTE that we wedge these in at the beginning rather than the
2752 // end of the object because the Class layout changed between JDK
2753 // 1.3 and JDK 1.4 with the new reflection implementation; some
2754 // nonstatic oop fields were added at the Java level. The offsets
2755 // of these fake fields can't change between these two JDK
2756 // versions because when the offsets are computed at bootstrap
2757 // time we don't know yet which version of the JDK we're running in.
2759 // The values below are fake but will force two non-static oop fields and
2760 // a corresponding non-static oop map block to be allocated.
2761 const int extra = java_lang_Class::number_of_fake_oop_fields;
2762 fac_ptr->nonstatic_oop_count += extra;
2763 }
2766 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) {
2767 // Cause the extra fake fields in java.lang.Class to show up before
2768 // the Java fields for layout compatibility between 1.3 and 1.4
2769 // Incrementing next_nonstatic_oop_offset here advances the
2770 // location where the real java fields are placed.
2771 const int extra = java_lang_Class::number_of_fake_oop_fields;
2772 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize);
2773 }
2776 // Force MethodHandle.vmentry to be an unmanaged pointer.
2777 // There is no way for a classfile to express this, so we must help it.
2778 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp,
2779 typeArrayHandle fields,
2780 FieldAllocationCount *fac_ptr,
2781 TRAPS) {
2782 // Add fake fields for java.dyn.MethodHandle instances
2783 //
2784 // This is not particularly nice, but since there is no way to express
2785 // a native wordSize field in Java, we must do it at this level.
2787 if (!EnableMethodHandles) return;
2789 int word_sig_index = 0;
2790 const int cp_size = cp->length();
2791 for (int index = 1; index < cp_size; index++) {
2792 if (cp->tag_at(index).is_utf8() &&
2793 cp->symbol_at(index) == vmSymbols::machine_word_signature()) {
2794 word_sig_index = index;
2795 break;
2796 }
2797 }
2799 if (word_sig_index == 0)
2800 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2801 "missing I or J signature (for vmentry) in java.dyn.MethodHandle");
2803 // Find vmentry field and change the signature.
2804 bool found_vmentry = false;
2805 for (int i = 0; i < fields->length(); i += instanceKlass::next_offset) {
2806 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
2807 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
2808 int acc_flags = fields->ushort_at(i + instanceKlass::access_flags_offset);
2809 symbolOop f_name = cp->symbol_at(name_index);
2810 symbolOop f_sig = cp->symbol_at(sig_index);
2812 if (f_name == vmSymbols::vmentry_name() && (acc_flags & JVM_ACC_STATIC) == 0) {
2813 if (f_sig == vmSymbols::machine_word_signature()) {
2814 // If the signature of vmentry is already changed, we're done.
2815 found_vmentry = true;
2816 break;
2817 }
2818 else if (f_sig == vmSymbols::byte_signature()) {
2819 // Adjust the field type from byte to an unmanaged pointer.
2820 assert(fac_ptr->nonstatic_byte_count > 0, "");
2821 fac_ptr->nonstatic_byte_count -= 1;
2823 fields->ushort_at_put(i + instanceKlass::signature_index_offset, word_sig_index);
2824 assert(wordSize == longSize || wordSize == jintSize, "ILP32 or LP64");
2825 if (wordSize == longSize) fac_ptr->nonstatic_double_count += 1;
2826 else fac_ptr->nonstatic_word_count += 1;
2828 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
2829 assert(atype == NONSTATIC_BYTE, "");
2830 FieldAllocationType new_atype = (wordSize == longSize) ? NONSTATIC_DOUBLE : NONSTATIC_WORD;
2831 fields->ushort_at_put(i + instanceKlass::low_offset, new_atype);
2833 found_vmentry = true;
2834 break;
2835 }
2836 }
2837 }
2839 if (!found_vmentry)
2840 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2841 "missing vmentry byte field in java.dyn.MethodHandle");
2842 }
2845 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
2846 Handle class_loader,
2847 Handle protection_domain,
2848 KlassHandle host_klass,
2849 GrowableArray<Handle>* cp_patches,
2850 symbolHandle& parsed_name,
2851 bool verify,
2852 TRAPS) {
2853 // So that JVMTI can cache class file in the state before retransformable agents
2854 // have modified it
2855 unsigned char *cached_class_file_bytes = NULL;
2856 jint cached_class_file_length;
2858 ClassFileStream* cfs = stream();
2859 // Timing
2860 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2861 JavaThread* jt = (JavaThread*) THREAD;
2863 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2864 ClassLoader::perf_class_parse_selftime(),
2865 NULL,
2866 jt->get_thread_stat()->perf_recursion_counts_addr(),
2867 jt->get_thread_stat()->perf_timers_addr(),
2868 PerfClassTraceTime::PARSE_CLASS);
2870 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
2872 if (JvmtiExport::should_post_class_file_load_hook()) {
2873 unsigned char* ptr = cfs->buffer();
2874 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2876 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2877 &ptr, &end_ptr,
2878 &cached_class_file_bytes,
2879 &cached_class_file_length);
2881 if (ptr != cfs->buffer()) {
2882 // JVMTI agent has modified class file data.
2883 // Set new class file stream using JVMTI agent modified
2884 // class file data.
2885 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2886 set_stream(cfs);
2887 }
2888 }
2890 _host_klass = host_klass;
2891 _cp_patches = cp_patches;
2893 instanceKlassHandle nullHandle;
2895 // Figure out whether we can skip format checking (matching classic VM behavior)
2896 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2898 // Set the verify flag in stream
2899 cfs->set_verify(_need_verify);
2901 // Save the class file name for easier error message printing.
2902 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name();
2904 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2905 // Magic value
2906 u4 magic = cfs->get_u4_fast();
2907 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2908 "Incompatible magic value %u in class file %s",
2909 magic, CHECK_(nullHandle));
2911 // Version numbers
2912 u2 minor_version = cfs->get_u2_fast();
2913 u2 major_version = cfs->get_u2_fast();
2915 // Check version numbers - we check this even with verifier off
2916 if (!is_supported_version(major_version, minor_version)) {
2917 if (name.is_null()) {
2918 Exceptions::fthrow(
2919 THREAD_AND_LOCATION,
2920 vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
2921 "Unsupported major.minor version %u.%u",
2922 major_version,
2923 minor_version);
2924 } else {
2925 ResourceMark rm(THREAD);
2926 Exceptions::fthrow(
2927 THREAD_AND_LOCATION,
2928 vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
2929 "%s : Unsupported major.minor version %u.%u",
2930 name->as_C_string(),
2931 major_version,
2932 minor_version);
2933 }
2934 return nullHandle;
2935 }
2937 _major_version = major_version;
2938 _minor_version = minor_version;
2941 // Check if verification needs to be relaxed for this class file
2942 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
2943 _relax_verify = Verifier::relax_verify_for(class_loader());
2945 // Constant pool
2946 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
2947 int cp_size = cp->length();
2949 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
2951 // Access flags
2952 AccessFlags access_flags;
2953 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
2955 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2956 // Set abstract bit for old class files for backward compatibility
2957 flags |= JVM_ACC_ABSTRACT;
2958 }
2959 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
2960 access_flags.set_flags(flags);
2962 // This class and superclass
2963 instanceKlassHandle super_klass;
2964 u2 this_class_index = cfs->get_u2_fast();
2965 check_property(
2966 valid_cp_range(this_class_index, cp_size) &&
2967 cp->tag_at(this_class_index).is_unresolved_klass(),
2968 "Invalid this class index %u in constant pool in class file %s",
2969 this_class_index, CHECK_(nullHandle));
2971 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index));
2972 assert(class_name.not_null(), "class_name can't be null");
2974 // It's important to set parsed_name *before* resolving the super class.
2975 // (it's used for cleanup by the caller if parsing fails)
2976 parsed_name = class_name;
2978 // Update _class_name which could be null previously to be class_name
2979 _class_name = class_name;
2981 // Don't need to check whether this class name is legal or not.
2982 // It has been checked when constant pool is parsed.
2983 // However, make sure it is not an array type.
2984 if (_need_verify) {
2985 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
2986 "Bad class name in class file %s",
2987 CHECK_(nullHandle));
2988 }
2990 klassOop preserve_this_klass; // for storing result across HandleMark
2992 // release all handles when parsing is done
2993 { HandleMark hm(THREAD);
2995 // Checks if name in class file matches requested name
2996 if (name.not_null() && class_name() != name()) {
2997 ResourceMark rm(THREAD);
2998 Exceptions::fthrow(
2999 THREAD_AND_LOCATION,
3000 vmSymbolHandles::java_lang_NoClassDefFoundError(),
3001 "%s (wrong name: %s)",
3002 name->as_C_string(),
3003 class_name->as_C_string()
3004 );
3005 return nullHandle;
3006 }
3008 if (TraceClassLoadingPreorder) {
3009 tty->print("[Loading %s", name()->as_klass_external_name());
3010 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3011 tty->print_cr("]");
3012 }
3014 u2 super_class_index = cfs->get_u2_fast();
3015 if (super_class_index == 0) {
3016 check_property(class_name() == vmSymbols::java_lang_Object(),
3017 "Invalid superclass index %u in class file %s",
3018 super_class_index,
3019 CHECK_(nullHandle));
3020 } else {
3021 check_property(valid_cp_range(super_class_index, cp_size) &&
3022 is_klass_reference(cp, super_class_index),
3023 "Invalid superclass index %u in class file %s",
3024 super_class_index,
3025 CHECK_(nullHandle));
3026 // The class name should be legal because it is checked when parsing constant pool.
3027 // However, make sure it is not an array type.
3028 bool is_array = false;
3029 if (cp->tag_at(super_class_index).is_klass()) {
3030 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3031 if (_need_verify)
3032 is_array = super_klass->oop_is_array();
3033 } else if (_need_verify) {
3034 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3035 }
3036 if (_need_verify) {
3037 guarantee_property(!is_array,
3038 "Bad superclass name in class file %s", CHECK_(nullHandle));
3039 }
3040 }
3042 // Interfaces
3043 u2 itfs_len = cfs->get_u2_fast();
3044 objArrayHandle local_interfaces;
3045 if (itfs_len == 0) {
3046 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3047 } else {
3048 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
3049 }
3051 // Fields (offsets are filled in later)
3052 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0};
3053 objArrayHandle fields_annotations;
3054 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle));
3055 // Methods
3056 bool has_final_method = false;
3057 AccessFlags promoted_flags;
3058 promoted_flags.set_flags(0);
3059 // These need to be oop pointers because they are allocated lazily
3060 // inside parse_methods inside a nested HandleMark
3061 objArrayOop methods_annotations_oop = NULL;
3062 objArrayOop methods_parameter_annotations_oop = NULL;
3063 objArrayOop methods_default_annotations_oop = NULL;
3064 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
3065 &promoted_flags,
3066 &has_final_method,
3067 &methods_annotations_oop,
3068 &methods_parameter_annotations_oop,
3069 &methods_default_annotations_oop,
3070 CHECK_(nullHandle));
3072 objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
3073 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
3074 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
3076 // We check super class after class file is parsed and format is checked
3077 if (super_class_index > 0 && super_klass.is_null()) {
3078 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index));
3079 if (access_flags.is_interface()) {
3080 // Before attempting to resolve the superclass, check for class format
3081 // errors not checked yet.
3082 guarantee_property(sk() == vmSymbols::java_lang_Object(),
3083 "Interfaces must have java.lang.Object as superclass in class file %s",
3084 CHECK_(nullHandle));
3085 }
3086 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
3087 sk,
3088 class_loader,
3089 protection_domain,
3090 true,
3091 CHECK_(nullHandle));
3093 KlassHandle kh (THREAD, k);
3094 super_klass = instanceKlassHandle(THREAD, kh());
3095 if (LinkWellKnownClasses) // my super class is well known to me
3096 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
3097 }
3098 if (super_klass.not_null()) {
3099 if (super_klass->is_interface()) {
3100 ResourceMark rm(THREAD);
3101 Exceptions::fthrow(
3102 THREAD_AND_LOCATION,
3103 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
3104 "class %s has interface %s as super class",
3105 class_name->as_klass_external_name(),
3106 super_klass->external_name()
3107 );
3108 return nullHandle;
3109 }
3110 // Make sure super class is not final
3111 if (super_klass->is_final()) {
3112 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3113 }
3114 }
3116 // Compute the transitive list of all unique interfaces implemented by this class
3117 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
3119 // sort methods
3120 typeArrayHandle method_ordering = sort_methods(methods,
3121 methods_annotations,
3122 methods_parameter_annotations,
3123 methods_default_annotations,
3124 CHECK_(nullHandle));
3126 // promote flags from parse_methods() to the klass' flags
3127 access_flags.add_promoted_flags(promoted_flags.as_int());
3129 // Size of Java vtable (in words)
3130 int vtable_size = 0;
3131 int itable_size = 0;
3132 int num_miranda_methods = 0;
3134 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3135 num_miranda_methods,
3136 super_klass(),
3137 methods(),
3138 access_flags,
3139 class_loader,
3140 class_name,
3141 local_interfaces(),
3142 CHECK_(nullHandle));
3144 // Size of Java itable (in words)
3145 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3147 // Field size and offset computation
3148 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3149 #ifndef PRODUCT
3150 int orig_nonstatic_field_size = 0;
3151 #endif
3152 int static_field_size = 0;
3153 int next_static_oop_offset;
3154 int next_static_double_offset;
3155 int next_static_word_offset;
3156 int next_static_short_offset;
3157 int next_static_byte_offset;
3158 int next_static_type_offset;
3159 int next_nonstatic_oop_offset;
3160 int next_nonstatic_double_offset;
3161 int next_nonstatic_word_offset;
3162 int next_nonstatic_short_offset;
3163 int next_nonstatic_byte_offset;
3164 int next_nonstatic_type_offset;
3165 int first_nonstatic_oop_offset;
3166 int first_nonstatic_field_offset;
3167 int next_nonstatic_field_offset;
3169 // Calculate the starting byte offsets
3170 next_static_oop_offset = (instanceKlass::header_size() +
3171 align_object_offset(vtable_size) +
3172 align_object_offset(itable_size)) * wordSize;
3173 next_static_double_offset = next_static_oop_offset +
3174 (fac.static_oop_count * heapOopSize);
3175 if ( fac.static_double_count &&
3176 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3177 Universe::field_type_should_be_aligned(T_LONG)) ) {
3178 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3179 }
3181 next_static_word_offset = next_static_double_offset +
3182 (fac.static_double_count * BytesPerLong);
3183 next_static_short_offset = next_static_word_offset +
3184 (fac.static_word_count * BytesPerInt);
3185 next_static_byte_offset = next_static_short_offset +
3186 (fac.static_short_count * BytesPerShort);
3187 next_static_type_offset = align_size_up((next_static_byte_offset +
3188 fac.static_byte_count ), wordSize );
3189 static_field_size = (next_static_type_offset -
3190 next_static_oop_offset) / wordSize;
3191 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3192 nonstatic_field_size * heapOopSize;
3193 next_nonstatic_field_offset = first_nonstatic_field_offset;
3195 // Add fake fields for java.lang.Class instances (also see below)
3196 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
3197 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle));
3198 }
3200 // adjust the vmentry field declaration in java.dyn.MethodHandle
3201 if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) {
3202 java_dyn_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle));
3203 }
3205 // Add a fake "discovered" field if it is not present
3206 // for compatibility with earlier jdk's.
3207 if (class_name() == vmSymbols::java_lang_ref_Reference()
3208 && class_loader.is_null()) {
3209 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle));
3210 }
3211 // end of "discovered" field compactibility fix
3213 unsigned int nonstatic_double_count = fac.nonstatic_double_count;
3214 unsigned int nonstatic_word_count = fac.nonstatic_word_count;
3215 unsigned int nonstatic_short_count = fac.nonstatic_short_count;
3216 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count;
3217 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count;
3219 bool super_has_nonstatic_fields =
3220 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3221 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3222 ((nonstatic_double_count + nonstatic_word_count +
3223 nonstatic_short_count + nonstatic_byte_count +
3224 nonstatic_oop_count) != 0);
3227 // Prepare list of oops for oop map generation.
3228 int* nonstatic_oop_offsets;
3229 unsigned int* nonstatic_oop_counts;
3230 unsigned int nonstatic_oop_map_count = 0;
3232 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3233 THREAD, int, nonstatic_oop_count + 1);
3234 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3235 THREAD, unsigned int, nonstatic_oop_count + 1);
3237 // Add fake fields for java.lang.Class instances (also see above).
3238 // FieldsAllocationStyle and CompactFields values will be reset to default.
3239 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
3240 java_lang_Class_fix_post(&next_nonstatic_field_offset);
3241 nonstatic_oop_offsets[0] = first_nonstatic_field_offset;
3242 const uint fake_oop_count = (next_nonstatic_field_offset -
3243 first_nonstatic_field_offset) / heapOopSize;
3244 nonstatic_oop_counts[0] = fake_oop_count;
3245 nonstatic_oop_map_count = 1;
3246 nonstatic_oop_count -= fake_oop_count;
3247 first_nonstatic_oop_offset = first_nonstatic_field_offset;
3248 } else {
3249 first_nonstatic_oop_offset = 0; // will be set for first oop field
3250 }
3252 #ifndef PRODUCT
3253 if( PrintCompactFieldsSavings ) {
3254 next_nonstatic_double_offset = next_nonstatic_field_offset +
3255 (nonstatic_oop_count * heapOopSize);
3256 if ( nonstatic_double_count > 0 ) {
3257 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3258 }
3259 next_nonstatic_word_offset = next_nonstatic_double_offset +
3260 (nonstatic_double_count * BytesPerLong);
3261 next_nonstatic_short_offset = next_nonstatic_word_offset +
3262 (nonstatic_word_count * BytesPerInt);
3263 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3264 (nonstatic_short_count * BytesPerShort);
3265 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3266 nonstatic_byte_count ), heapOopSize );
3267 orig_nonstatic_field_size = nonstatic_field_size +
3268 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3269 }
3270 #endif
3271 bool compact_fields = CompactFields;
3272 int allocation_style = FieldsAllocationStyle;
3273 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3274 assert(false, "0 <= FieldsAllocationStyle <= 2");
3275 allocation_style = 1; // Optimistic
3276 }
3278 // The next classes have predefined hard-coded fields offsets
3279 // (see in JavaClasses::compute_hard_coded_offsets()).
3280 // Use default fields allocation order for them.
3281 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3282 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() ||
3283 class_name() == vmSymbols::java_lang_Class() ||
3284 class_name() == vmSymbols::java_lang_ClassLoader() ||
3285 class_name() == vmSymbols::java_lang_ref_Reference() ||
3286 class_name() == vmSymbols::java_lang_ref_SoftReference() ||
3287 class_name() == vmSymbols::java_lang_StackTraceElement() ||
3288 class_name() == vmSymbols::java_lang_String() ||
3289 class_name() == vmSymbols::java_lang_Throwable() ||
3290 class_name() == vmSymbols::java_lang_Boolean() ||
3291 class_name() == vmSymbols::java_lang_Character() ||
3292 class_name() == vmSymbols::java_lang_Float() ||
3293 class_name() == vmSymbols::java_lang_Double() ||
3294 class_name() == vmSymbols::java_lang_Byte() ||
3295 class_name() == vmSymbols::java_lang_Short() ||
3296 class_name() == vmSymbols::java_lang_Integer() ||
3297 class_name() == vmSymbols::java_lang_Long())) {
3298 allocation_style = 0; // Allocate oops first
3299 compact_fields = false; // Don't compact fields
3300 }
3302 if( allocation_style == 0 ) {
3303 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3304 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3305 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3306 (nonstatic_oop_count * heapOopSize);
3307 } else if( allocation_style == 1 ) {
3308 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3309 next_nonstatic_double_offset = next_nonstatic_field_offset;
3310 } else if( allocation_style == 2 ) {
3311 // Fields allocation: oops fields in super and sub classes are together.
3312 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3313 super_klass->nonstatic_oop_map_size() > 0 ) {
3314 int map_size = super_klass->nonstatic_oop_map_size();
3315 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3316 OopMapBlock* last_map = first_map + map_size - 1;
3317 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3318 if (next_offset == next_nonstatic_field_offset) {
3319 allocation_style = 0; // allocate oops first
3320 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3321 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3322 (nonstatic_oop_count * heapOopSize);
3323 }
3324 }
3325 if( allocation_style == 2 ) {
3326 allocation_style = 1; // allocate oops last
3327 next_nonstatic_double_offset = next_nonstatic_field_offset;
3328 }
3329 } else {
3330 ShouldNotReachHere();
3331 }
3333 int nonstatic_oop_space_count = 0;
3334 int nonstatic_word_space_count = 0;
3335 int nonstatic_short_space_count = 0;
3336 int nonstatic_byte_space_count = 0;
3337 int nonstatic_oop_space_offset;
3338 int nonstatic_word_space_offset;
3339 int nonstatic_short_space_offset;
3340 int nonstatic_byte_space_offset;
3342 if( nonstatic_double_count > 0 ) {
3343 int offset = next_nonstatic_double_offset;
3344 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3345 if( compact_fields && offset != next_nonstatic_double_offset ) {
3346 // Allocate available fields into the gap before double field.
3347 int length = next_nonstatic_double_offset - offset;
3348 assert(length == BytesPerInt, "");
3349 nonstatic_word_space_offset = offset;
3350 if( nonstatic_word_count > 0 ) {
3351 nonstatic_word_count -= 1;
3352 nonstatic_word_space_count = 1; // Only one will fit
3353 length -= BytesPerInt;
3354 offset += BytesPerInt;
3355 }
3356 nonstatic_short_space_offset = offset;
3357 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3358 nonstatic_short_count -= 1;
3359 nonstatic_short_space_count += 1;
3360 length -= BytesPerShort;
3361 offset += BytesPerShort;
3362 }
3363 nonstatic_byte_space_offset = offset;
3364 while( length > 0 && nonstatic_byte_count > 0 ) {
3365 nonstatic_byte_count -= 1;
3366 nonstatic_byte_space_count += 1;
3367 length -= 1;
3368 }
3369 // Allocate oop field in the gap if there are no other fields for that.
3370 nonstatic_oop_space_offset = offset;
3371 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3372 allocation_style != 0 ) { // when oop fields not first
3373 nonstatic_oop_count -= 1;
3374 nonstatic_oop_space_count = 1; // Only one will fit
3375 length -= heapOopSize;
3376 offset += heapOopSize;
3377 }
3378 }
3379 }
3381 next_nonstatic_word_offset = next_nonstatic_double_offset +
3382 (nonstatic_double_count * BytesPerLong);
3383 next_nonstatic_short_offset = next_nonstatic_word_offset +
3384 (nonstatic_word_count * BytesPerInt);
3385 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3386 (nonstatic_short_count * BytesPerShort);
3388 int notaligned_offset;
3389 if( allocation_style == 0 ) {
3390 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3391 } else { // allocation_style == 1
3392 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3393 if( nonstatic_oop_count > 0 ) {
3394 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3395 }
3396 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3397 }
3398 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3399 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3400 - first_nonstatic_field_offset)/heapOopSize);
3402 // Iterate over fields again and compute correct offsets.
3403 // The field allocation type was temporarily stored in the offset slot.
3404 // oop fields are located before non-oop fields (static and non-static).
3405 int len = fields->length();
3406 for (int i = 0; i < len; i += instanceKlass::next_offset) {
3407 int real_offset;
3408 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
3409 switch (atype) {
3410 case STATIC_OOP:
3411 real_offset = next_static_oop_offset;
3412 next_static_oop_offset += heapOopSize;
3413 break;
3414 case STATIC_BYTE:
3415 real_offset = next_static_byte_offset;
3416 next_static_byte_offset += 1;
3417 break;
3418 case STATIC_SHORT:
3419 real_offset = next_static_short_offset;
3420 next_static_short_offset += BytesPerShort;
3421 break;
3422 case STATIC_WORD:
3423 real_offset = next_static_word_offset;
3424 next_static_word_offset += BytesPerInt;
3425 break;
3426 case STATIC_ALIGNED_DOUBLE:
3427 case STATIC_DOUBLE:
3428 real_offset = next_static_double_offset;
3429 next_static_double_offset += BytesPerLong;
3430 break;
3431 case NONSTATIC_OOP:
3432 if( nonstatic_oop_space_count > 0 ) {
3433 real_offset = nonstatic_oop_space_offset;
3434 nonstatic_oop_space_offset += heapOopSize;
3435 nonstatic_oop_space_count -= 1;
3436 } else {
3437 real_offset = next_nonstatic_oop_offset;
3438 next_nonstatic_oop_offset += heapOopSize;
3439 }
3440 // Update oop maps
3441 if( nonstatic_oop_map_count > 0 &&
3442 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3443 real_offset -
3444 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3445 heapOopSize ) {
3446 // Extend current oop map
3447 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3448 } else {
3449 // Create new oop map
3450 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3451 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3452 nonstatic_oop_map_count += 1;
3453 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3454 first_nonstatic_oop_offset = real_offset;
3455 }
3456 }
3457 break;
3458 case NONSTATIC_BYTE:
3459 if( nonstatic_byte_space_count > 0 ) {
3460 real_offset = nonstatic_byte_space_offset;
3461 nonstatic_byte_space_offset += 1;
3462 nonstatic_byte_space_count -= 1;
3463 } else {
3464 real_offset = next_nonstatic_byte_offset;
3465 next_nonstatic_byte_offset += 1;
3466 }
3467 break;
3468 case NONSTATIC_SHORT:
3469 if( nonstatic_short_space_count > 0 ) {
3470 real_offset = nonstatic_short_space_offset;
3471 nonstatic_short_space_offset += BytesPerShort;
3472 nonstatic_short_space_count -= 1;
3473 } else {
3474 real_offset = next_nonstatic_short_offset;
3475 next_nonstatic_short_offset += BytesPerShort;
3476 }
3477 break;
3478 case NONSTATIC_WORD:
3479 if( nonstatic_word_space_count > 0 ) {
3480 real_offset = nonstatic_word_space_offset;
3481 nonstatic_word_space_offset += BytesPerInt;
3482 nonstatic_word_space_count -= 1;
3483 } else {
3484 real_offset = next_nonstatic_word_offset;
3485 next_nonstatic_word_offset += BytesPerInt;
3486 }
3487 break;
3488 case NONSTATIC_ALIGNED_DOUBLE:
3489 case NONSTATIC_DOUBLE:
3490 real_offset = next_nonstatic_double_offset;
3491 next_nonstatic_double_offset += BytesPerLong;
3492 break;
3493 default:
3494 ShouldNotReachHere();
3495 }
3496 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
3497 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
3498 }
3500 // Size of instances
3501 int instance_size;
3503 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3504 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3506 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3508 // Number of non-static oop map blocks allocated at end of klass.
3509 const unsigned int total_oop_map_count =
3510 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3511 first_nonstatic_oop_offset);
3513 // Compute reference type
3514 ReferenceType rt;
3515 if (super_klass() == NULL) {
3516 rt = REF_NONE;
3517 } else {
3518 rt = super_klass->reference_type();
3519 }
3521 // We can now create the basic klassOop for this klass
3522 klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size,
3523 static_field_size,
3524 total_oop_map_count,
3525 rt, CHECK_(nullHandle));
3526 instanceKlassHandle this_klass (THREAD, ik);
3528 assert(this_klass->static_field_size() == static_field_size, "sanity");
3529 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3530 "sanity");
3532 // Fill in information already parsed
3533 this_klass->set_access_flags(access_flags);
3534 this_klass->set_should_verify_class(verify);
3535 jint lh = Klass::instance_layout_helper(instance_size, false);
3536 this_klass->set_layout_helper(lh);
3537 assert(this_klass->oop_is_instance(), "layout is correct");
3538 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3539 // Not yet: supers are done below to support the new subtype-checking fields
3540 //this_klass->set_super(super_klass());
3541 this_klass->set_class_loader(class_loader());
3542 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3543 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3544 this_klass->set_static_oop_field_size(fac.static_oop_count);
3545 cp->set_pool_holder(this_klass());
3546 this_klass->set_constants(cp());
3547 this_klass->set_local_interfaces(local_interfaces());
3548 this_klass->set_fields(fields());
3549 this_klass->set_methods(methods());
3550 if (has_final_method) {
3551 this_klass->set_has_final_method();
3552 }
3553 this_klass->set_method_ordering(method_ordering());
3554 // The instanceKlass::_methods_jmethod_ids cache and the
3555 // instanceKlass::_methods_cached_itable_indices cache are
3556 // both managed on the assumption that the initial cache
3557 // size is equal to the number of methods in the class. If
3558 // that changes, then instanceKlass::idnum_can_increment()
3559 // has to be changed accordingly.
3560 this_klass->set_initial_method_idnum(methods->length());
3561 this_klass->set_name(cp->klass_name_at(this_class_index));
3562 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself
3563 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3564 this_klass->set_protection_domain(protection_domain());
3565 this_klass->set_fields_annotations(fields_annotations());
3566 this_klass->set_methods_annotations(methods_annotations());
3567 this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3568 this_klass->set_methods_default_annotations(methods_default_annotations());
3570 this_klass->set_minor_version(minor_version);
3571 this_klass->set_major_version(major_version);
3573 // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3574 // (We used to do this lazily, but now we query it in Rewriter,
3575 // which is eagerly done for every method, so we might as well do it now,
3576 // when everything is fresh in memory.)
3577 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3578 for (int j = 0; j < methods->length(); j++) {
3579 ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3580 }
3581 }
3583 if (cached_class_file_bytes != NULL) {
3584 // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3585 this_klass->set_cached_class_file(cached_class_file_bytes,
3586 cached_class_file_length);
3587 }
3589 // Miranda methods
3590 if ((num_miranda_methods > 0) ||
3591 // if this class introduced new miranda methods or
3592 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3593 // super class exists and this class inherited miranda methods
3594 ) {
3595 this_klass->set_has_miranda_methods(); // then set a flag
3596 }
3598 // Additional attributes
3599 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
3601 // Make sure this is the end of class file stream
3602 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3604 // Initialize static fields
3605 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle));
3607 // VerifyOops believes that once this has been set, the object is completely loaded.
3608 // Compute transitive closure of interfaces this class implements
3609 this_klass->set_transitive_interfaces(transitive_interfaces());
3611 // Fill in information needed to compute superclasses.
3612 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3614 // Initialize itable offset tables
3615 klassItable::setup_itable_offset_table(this_klass);
3617 // Do final class setup
3618 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3620 set_precomputed_flags(this_klass);
3622 // reinitialize modifiers, using the InnerClasses attribute
3623 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3624 this_klass->set_modifier_flags(computed_modifiers);
3626 // check if this class can access its super class
3627 check_super_class_access(this_klass, CHECK_(nullHandle));
3629 // check if this class can access its superinterfaces
3630 check_super_interface_access(this_klass, CHECK_(nullHandle));
3632 // check if this class overrides any final method
3633 check_final_method_override(this_klass, CHECK_(nullHandle));
3635 // check that if this class is an interface then it doesn't have static methods
3636 if (this_klass->is_interface()) {
3637 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3638 }
3640 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3641 false /* not shared class */);
3643 if (TraceClassLoading) {
3644 // print in a single call to reduce interleaving of output
3645 if (cfs->source() != NULL) {
3646 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3647 cfs->source());
3648 } else if (class_loader.is_null()) {
3649 if (THREAD->is_Java_thread()) {
3650 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3651 tty->print("[Loaded %s by instance of %s]\n",
3652 this_klass->external_name(),
3653 instanceKlass::cast(caller)->external_name());
3654 } else {
3655 tty->print("[Loaded %s]\n", this_klass->external_name());
3656 }
3657 } else {
3658 ResourceMark rm;
3659 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3660 instanceKlass::cast(class_loader->klass())->external_name());
3661 }
3662 }
3664 if (TraceClassResolution) {
3665 // print out the superclass.
3666 const char * from = Klass::cast(this_klass())->external_name();
3667 if (this_klass->java_super() != NULL) {
3668 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3669 }
3670 // print out each of the interface classes referred to by this class.
3671 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3672 if (!local_interfaces.is_null()) {
3673 int length = local_interfaces->length();
3674 for (int i = 0; i < length; i++) {
3675 klassOop k = klassOop(local_interfaces->obj_at(i));
3676 instanceKlass* to_class = instanceKlass::cast(k);
3677 const char * to = to_class->external_name();
3678 tty->print("RESOLVE %s %s (interface)\n", from, to);
3679 }
3680 }
3681 }
3683 #ifndef PRODUCT
3684 if( PrintCompactFieldsSavings ) {
3685 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3686 tty->print("[Saved %d of %d bytes in %s]\n",
3687 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3688 orig_nonstatic_field_size*heapOopSize,
3689 this_klass->external_name());
3690 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3691 tty->print("[Wasted %d over %d bytes in %s]\n",
3692 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3693 orig_nonstatic_field_size*heapOopSize,
3694 this_klass->external_name());
3695 }
3696 }
3697 #endif
3699 // preserve result across HandleMark
3700 preserve_this_klass = this_klass();
3701 }
3703 // Create new handle outside HandleMark
3704 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3705 debug_only(this_klass->as_klassOop()->verify();)
3707 return this_klass;
3708 }
3711 unsigned int
3712 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3713 unsigned int nonstatic_oop_map_count,
3714 int first_nonstatic_oop_offset) {
3715 unsigned int map_count =
3716 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3717 if (nonstatic_oop_map_count > 0) {
3718 // We have oops to add to map
3719 if (map_count == 0) {
3720 map_count = nonstatic_oop_map_count;
3721 } else {
3722 // Check whether we should add a new map block or whether the last one can
3723 // be extended
3724 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3725 OopMapBlock* const last_map = first_map + map_count - 1;
3727 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3728 if (next_offset == first_nonstatic_oop_offset) {
3729 // There is no gap bettwen superklass's last oop field and first
3730 // local oop field, merge maps.
3731 nonstatic_oop_map_count -= 1;
3732 } else {
3733 // Superklass didn't end with a oop field, add extra maps
3734 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3735 }
3736 map_count += nonstatic_oop_map_count;
3737 }
3738 }
3739 return map_count;
3740 }
3743 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3744 unsigned int nonstatic_oop_map_count,
3745 int* nonstatic_oop_offsets,
3746 unsigned int* nonstatic_oop_counts) {
3747 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3748 const instanceKlass* const super = k->superklass();
3749 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3750 if (super_count > 0) {
3751 // Copy maps from superklass
3752 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3753 for (unsigned int i = 0; i < super_count; ++i) {
3754 *this_oop_map++ = *super_oop_map++;
3755 }
3756 }
3758 if (nonstatic_oop_map_count > 0) {
3759 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3760 // The counts differ because there is no gap between superklass's last oop
3761 // field and the first local oop field. Extend the last oop map copied
3762 // from the superklass instead of creating new one.
3763 nonstatic_oop_map_count--;
3764 nonstatic_oop_offsets++;
3765 this_oop_map--;
3766 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3767 this_oop_map++;
3768 }
3770 // Add new map blocks, fill them
3771 while (nonstatic_oop_map_count-- > 0) {
3772 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3773 this_oop_map->set_count(*nonstatic_oop_counts++);
3774 this_oop_map++;
3775 }
3776 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3777 this_oop_map, "sanity");
3778 }
3779 }
3782 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3783 klassOop super = k->super();
3785 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3786 // in which case we don't have to register objects as finalizable
3787 if (!_has_empty_finalizer) {
3788 if (_has_finalizer ||
3789 (super != NULL && super->klass_part()->has_finalizer())) {
3790 k->set_has_finalizer();
3791 }
3792 }
3794 #ifdef ASSERT
3795 bool f = false;
3796 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3797 vmSymbols::void_method_signature());
3798 if (m != NULL && !m->is_empty_method()) {
3799 f = true;
3800 }
3801 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3802 #endif
3804 // Check if this klass supports the java.lang.Cloneable interface
3805 if (SystemDictionary::Cloneable_klass_loaded()) {
3806 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3807 k->set_is_cloneable();
3808 }
3809 }
3811 // Check if this klass has a vanilla default constructor
3812 if (super == NULL) {
3813 // java.lang.Object has empty default constructor
3814 k->set_has_vanilla_constructor();
3815 } else {
3816 if (Klass::cast(super)->has_vanilla_constructor() &&
3817 _has_vanilla_constructor) {
3818 k->set_has_vanilla_constructor();
3819 }
3820 #ifdef ASSERT
3821 bool v = false;
3822 if (Klass::cast(super)->has_vanilla_constructor()) {
3823 methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3824 ), vmSymbols::void_method_signature());
3825 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3826 v = true;
3827 }
3828 }
3829 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3830 #endif
3831 }
3833 // If it cannot be fast-path allocated, set a bit in the layout helper.
3834 // See documentation of instanceKlass::can_be_fastpath_allocated().
3835 assert(k->size_helper() > 0, "layout_helper is initialized");
3836 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3837 || k->is_abstract() || k->is_interface()
3838 || (k->name() == vmSymbols::java_lang_Class()
3839 && k->class_loader() == NULL)
3840 || k->size_helper() >= FastAllocateSizeLimit) {
3841 // Forbid fast-path allocation.
3842 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3843 k->set_layout_helper(lh);
3844 }
3845 }
3848 // utility method for appending and array with check for duplicates
3850 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3851 // iterate over new interfaces
3852 for (int i = 0; i < ifs->length(); i++) {
3853 oop e = ifs->obj_at(i);
3854 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3855 // check for duplicates
3856 bool duplicate = false;
3857 for (int j = 0; j < index; j++) {
3858 if (result->obj_at(j) == e) {
3859 duplicate = true;
3860 break;
3861 }
3862 }
3863 // add new interface
3864 if (!duplicate) {
3865 result->obj_at_put(index++, e);
3866 }
3867 }
3868 }
3870 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3871 // Compute maximum size for transitive interfaces
3872 int max_transitive_size = 0;
3873 int super_size = 0;
3874 // Add superclass transitive interfaces size
3875 if (super.not_null()) {
3876 super_size = super->transitive_interfaces()->length();
3877 max_transitive_size += super_size;
3878 }
3879 // Add local interfaces' super interfaces
3880 int local_size = local_ifs->length();
3881 for (int i = 0; i < local_size; i++) {
3882 klassOop l = klassOop(local_ifs->obj_at(i));
3883 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3884 }
3885 // Finally add local interfaces
3886 max_transitive_size += local_size;
3887 // Construct array
3888 objArrayHandle result;
3889 if (max_transitive_size == 0) {
3890 // no interfaces, use canonicalized array
3891 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3892 } else if (max_transitive_size == super_size) {
3893 // no new local interfaces added, share superklass' transitive interface array
3894 result = objArrayHandle(THREAD, super->transitive_interfaces());
3895 } else if (max_transitive_size == local_size) {
3896 // only local interfaces added, share local interface array
3897 result = local_ifs;
3898 } else {
3899 objArrayHandle nullHandle;
3900 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3901 result = objArrayHandle(THREAD, new_objarray);
3902 int index = 0;
3903 // Copy down from superclass
3904 if (super.not_null()) {
3905 append_interfaces(result, index, super->transitive_interfaces());
3906 }
3907 // Copy down from local interfaces' superinterfaces
3908 for (int i = 0; i < local_ifs->length(); i++) {
3909 klassOop l = klassOop(local_ifs->obj_at(i));
3910 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3911 }
3912 // Finally add local interfaces
3913 append_interfaces(result, index, local_ifs());
3915 // Check if duplicates were removed
3916 if (index != max_transitive_size) {
3917 assert(index < max_transitive_size, "just checking");
3918 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3919 for (int i = 0; i < index; i++) {
3920 oop e = result->obj_at(i);
3921 assert(e != NULL, "just checking");
3922 new_result->obj_at_put(i, e);
3923 }
3924 result = objArrayHandle(THREAD, new_result);
3925 }
3926 }
3927 return result;
3928 }
3931 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3932 klassOop super = this_klass->super();
3933 if ((super != NULL) &&
3934 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3935 ResourceMark rm(THREAD);
3936 Exceptions::fthrow(
3937 THREAD_AND_LOCATION,
3938 vmSymbolHandles::java_lang_IllegalAccessError(),
3939 "class %s cannot access its superclass %s",
3940 this_klass->external_name(),
3941 instanceKlass::cast(super)->external_name()
3942 );
3943 return;
3944 }
3945 }
3948 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
3949 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
3950 int lng = local_interfaces->length();
3951 for (int i = lng - 1; i >= 0; i--) {
3952 klassOop k = klassOop(local_interfaces->obj_at(i));
3953 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
3954 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
3955 ResourceMark rm(THREAD);
3956 Exceptions::fthrow(
3957 THREAD_AND_LOCATION,
3958 vmSymbolHandles::java_lang_IllegalAccessError(),
3959 "class %s cannot access its superinterface %s",
3960 this_klass->external_name(),
3961 instanceKlass::cast(k)->external_name()
3962 );
3963 return;
3964 }
3965 }
3966 }
3969 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
3970 objArrayHandle methods (THREAD, this_klass->methods());
3971 int num_methods = methods->length();
3973 // go thru each method and check if it overrides a final method
3974 for (int index = 0; index < num_methods; index++) {
3975 methodOop m = (methodOop)methods->obj_at(index);
3977 // skip private, static and <init> methods
3978 if ((!m->is_private()) &&
3979 (!m->is_static()) &&
3980 (m->name() != vmSymbols::object_initializer_name())) {
3982 symbolOop name = m->name();
3983 symbolOop signature = m->signature();
3984 klassOop k = this_klass->super();
3985 methodOop super_m = NULL;
3986 while (k != NULL) {
3987 // skip supers that don't have final methods.
3988 if (k->klass_part()->has_final_method()) {
3989 // lookup a matching method in the super class hierarchy
3990 super_m = instanceKlass::cast(k)->lookup_method(name, signature);
3991 if (super_m == NULL) {
3992 break; // didn't find any match; get out
3993 }
3995 if (super_m->is_final() &&
3996 // matching method in super is final
3997 (Reflection::verify_field_access(this_klass->as_klassOop(),
3998 super_m->method_holder(),
3999 super_m->method_holder(),
4000 super_m->access_flags(), false))
4001 // this class can access super final method and therefore override
4002 ) {
4003 ResourceMark rm(THREAD);
4004 Exceptions::fthrow(
4005 THREAD_AND_LOCATION,
4006 vmSymbolHandles::java_lang_VerifyError(),
4007 "class %s overrides final method %s.%s",
4008 this_klass->external_name(),
4009 name->as_C_string(),
4010 signature->as_C_string()
4011 );
4012 return;
4013 }
4015 // continue to look from super_m's holder's super.
4016 k = instanceKlass::cast(super_m->method_holder())->super();
4017 continue;
4018 }
4020 k = k->klass_part()->super();
4021 }
4022 }
4023 }
4024 }
4027 // assumes that this_klass is an interface
4028 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4029 assert(this_klass->is_interface(), "not an interface");
4030 objArrayHandle methods (THREAD, this_klass->methods());
4031 int num_methods = methods->length();
4033 for (int index = 0; index < num_methods; index++) {
4034 methodOop m = (methodOop)methods->obj_at(index);
4035 // if m is static and not the init method, throw a verify error
4036 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4037 ResourceMark rm(THREAD);
4038 Exceptions::fthrow(
4039 THREAD_AND_LOCATION,
4040 vmSymbolHandles::java_lang_VerifyError(),
4041 "Illegal static method %s in interface %s",
4042 m->name()->as_C_string(),
4043 this_klass->external_name()
4044 );
4045 return;
4046 }
4047 }
4048 }
4050 // utility methods for format checking
4052 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4053 if (!_need_verify) { return; }
4055 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4056 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4057 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4058 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4059 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4060 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4061 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4063 if ((is_abstract && is_final) ||
4064 (is_interface && !is_abstract) ||
4065 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4066 (!is_interface && major_gte_15 && is_annotation)) {
4067 ResourceMark rm(THREAD);
4068 Exceptions::fthrow(
4069 THREAD_AND_LOCATION,
4070 vmSymbolHandles::java_lang_ClassFormatError(),
4071 "Illegal class modifiers in class %s: 0x%X",
4072 _class_name->as_C_string(), flags
4073 );
4074 return;
4075 }
4076 }
4078 bool ClassFileParser::has_illegal_visibility(jint flags) {
4079 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4080 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4081 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4083 return ((is_public && is_protected) ||
4084 (is_public && is_private) ||
4085 (is_protected && is_private));
4086 }
4088 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4089 u2 max_version =
4090 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4091 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4092 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4093 (major <= max_version) &&
4094 ((major != max_version) ||
4095 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4096 }
4098 void ClassFileParser::verify_legal_field_modifiers(
4099 jint flags, bool is_interface, TRAPS) {
4100 if (!_need_verify) { return; }
4102 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4103 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4104 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4105 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4106 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4107 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4108 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4109 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4110 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4112 bool is_illegal = false;
4114 if (is_interface) {
4115 if (!is_public || !is_static || !is_final || is_private ||
4116 is_protected || is_volatile || is_transient ||
4117 (major_gte_15 && is_enum)) {
4118 is_illegal = true;
4119 }
4120 } else { // not interface
4121 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4122 is_illegal = true;
4123 }
4124 }
4126 if (is_illegal) {
4127 ResourceMark rm(THREAD);
4128 Exceptions::fthrow(
4129 THREAD_AND_LOCATION,
4130 vmSymbolHandles::java_lang_ClassFormatError(),
4131 "Illegal field modifiers in class %s: 0x%X",
4132 _class_name->as_C_string(), flags);
4133 return;
4134 }
4135 }
4137 void ClassFileParser::verify_legal_method_modifiers(
4138 jint flags, bool is_interface, symbolHandle name, TRAPS) {
4139 if (!_need_verify) { return; }
4141 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4142 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4143 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4144 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4145 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4146 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4147 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4148 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4149 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4150 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4151 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4153 bool is_illegal = false;
4155 if (is_interface) {
4156 if (!is_abstract || !is_public || is_static || is_final ||
4157 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4158 is_illegal = true;
4159 }
4160 } else { // not interface
4161 if (is_initializer) {
4162 if (is_static || is_final || is_synchronized || is_native ||
4163 is_abstract || (major_gte_15 && is_bridge)) {
4164 is_illegal = true;
4165 }
4166 } else { // not initializer
4167 if (is_abstract) {
4168 if ((is_final || is_native || is_private || is_static ||
4169 (major_gte_15 && (is_synchronized || is_strict)))) {
4170 is_illegal = true;
4171 }
4172 }
4173 if (has_illegal_visibility(flags)) {
4174 is_illegal = true;
4175 }
4176 }
4177 }
4179 if (is_illegal) {
4180 ResourceMark rm(THREAD);
4181 Exceptions::fthrow(
4182 THREAD_AND_LOCATION,
4183 vmSymbolHandles::java_lang_ClassFormatError(),
4184 "Method %s in class %s has illegal modifiers: 0x%X",
4185 name->as_C_string(), _class_name->as_C_string(), flags);
4186 return;
4187 }
4188 }
4190 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4191 assert(_need_verify, "only called when _need_verify is true");
4192 int i = 0;
4193 int count = length >> 2;
4194 for (int k=0; k<count; k++) {
4195 unsigned char b0 = buffer[i];
4196 unsigned char b1 = buffer[i+1];
4197 unsigned char b2 = buffer[i+2];
4198 unsigned char b3 = buffer[i+3];
4199 // For an unsigned char v,
4200 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4201 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4202 unsigned char res = b0 | b0 - 1 |
4203 b1 | b1 - 1 |
4204 b2 | b2 - 1 |
4205 b3 | b3 - 1;
4206 if (res >= 128) break;
4207 i += 4;
4208 }
4209 for(; i < length; i++) {
4210 unsigned short c;
4211 // no embedded zeros
4212 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4213 if(buffer[i] < 128) {
4214 continue;
4215 }
4216 if ((i + 5) < length) { // see if it's legal supplementary character
4217 if (UTF8::is_supplementary_character(&buffer[i])) {
4218 c = UTF8::get_supplementary_character(&buffer[i]);
4219 i += 5;
4220 continue;
4221 }
4222 }
4223 switch (buffer[i] >> 4) {
4224 default: break;
4225 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4226 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4227 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4228 c = (buffer[i] & 0x1F) << 6;
4229 i++;
4230 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4231 c += buffer[i] & 0x3F;
4232 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4233 // for classes with major > 47, c must a null or a character in its shortest form
4234 break;
4235 }
4236 }
4237 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4238 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4239 c = (buffer[i] & 0xF) << 12;
4240 i += 2;
4241 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4242 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4243 if (_major_version <= 47 || c >= 0x800) {
4244 // for classes with major > 47, c must be in its shortest form
4245 break;
4246 }
4247 }
4248 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4249 } // end of switch
4250 } // end of for
4251 }
4253 // Checks if name is a legal class name.
4254 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) {
4255 if (!_need_verify || _relax_verify) { return; }
4257 char buf[fixed_buffer_size];
4258 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4259 unsigned int length = name->utf8_length();
4260 bool legal = false;
4262 if (length > 0) {
4263 char* p;
4264 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4265 p = skip_over_field_signature(bytes, false, length, CHECK);
4266 legal = (p != NULL) && ((p - bytes) == (int)length);
4267 } else if (_major_version < JAVA_1_5_VERSION) {
4268 if (bytes[0] != '<') {
4269 p = skip_over_field_name(bytes, true, length);
4270 legal = (p != NULL) && ((p - bytes) == (int)length);
4271 }
4272 } else {
4273 // 4900761: relax the constraints based on JSR202 spec
4274 // Class names may be drawn from the entire Unicode character set.
4275 // Identifiers between '/' must be unqualified names.
4276 // The utf8 string has been verified when parsing cpool entries.
4277 legal = verify_unqualified_name(bytes, length, LegalClass);
4278 }
4279 }
4280 if (!legal) {
4281 ResourceMark rm(THREAD);
4282 Exceptions::fthrow(
4283 THREAD_AND_LOCATION,
4284 vmSymbolHandles::java_lang_ClassFormatError(),
4285 "Illegal class name \"%s\" in class file %s", bytes,
4286 _class_name->as_C_string()
4287 );
4288 return;
4289 }
4290 }
4292 // Checks if name is a legal field name.
4293 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) {
4294 if (!_need_verify || _relax_verify) { return; }
4296 char buf[fixed_buffer_size];
4297 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4298 unsigned int length = name->utf8_length();
4299 bool legal = false;
4301 if (length > 0) {
4302 if (_major_version < JAVA_1_5_VERSION) {
4303 if (bytes[0] != '<') {
4304 char* p = skip_over_field_name(bytes, false, length);
4305 legal = (p != NULL) && ((p - bytes) == (int)length);
4306 }
4307 } else {
4308 // 4881221: relax the constraints based on JSR202 spec
4309 legal = verify_unqualified_name(bytes, length, LegalField);
4310 }
4311 }
4313 if (!legal) {
4314 ResourceMark rm(THREAD);
4315 Exceptions::fthrow(
4316 THREAD_AND_LOCATION,
4317 vmSymbolHandles::java_lang_ClassFormatError(),
4318 "Illegal field name \"%s\" in class %s", bytes,
4319 _class_name->as_C_string()
4320 );
4321 return;
4322 }
4323 }
4325 // Checks if name is a legal method name.
4326 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) {
4327 if (!_need_verify || _relax_verify) { return; }
4329 assert(!name.is_null(), "method name is null");
4330 char buf[fixed_buffer_size];
4331 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4332 unsigned int length = name->utf8_length();
4333 bool legal = false;
4335 if (length > 0) {
4336 if (bytes[0] == '<') {
4337 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4338 legal = true;
4339 }
4340 } else if (_major_version < JAVA_1_5_VERSION) {
4341 char* p;
4342 p = skip_over_field_name(bytes, false, length);
4343 legal = (p != NULL) && ((p - bytes) == (int)length);
4344 } else {
4345 // 4881221: relax the constraints based on JSR202 spec
4346 legal = verify_unqualified_name(bytes, length, LegalMethod);
4347 }
4348 }
4350 if (!legal) {
4351 ResourceMark rm(THREAD);
4352 Exceptions::fthrow(
4353 THREAD_AND_LOCATION,
4354 vmSymbolHandles::java_lang_ClassFormatError(),
4355 "Illegal method name \"%s\" in class %s", bytes,
4356 _class_name->as_C_string()
4357 );
4358 return;
4359 }
4360 }
4363 // Checks if signature is a legal field signature.
4364 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) {
4365 if (!_need_verify) { return; }
4367 char buf[fixed_buffer_size];
4368 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4369 unsigned int length = signature->utf8_length();
4370 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4372 if (p == NULL || (p - bytes) != (int)length) {
4373 throwIllegalSignature("Field", name, signature, CHECK);
4374 }
4375 }
4377 // Checks if signature is a legal method signature.
4378 // Returns number of parameters
4379 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) {
4380 if (!_need_verify) {
4381 // make sure caller's args_size will be less than 0 even for non-static
4382 // method so it will be recomputed in compute_size_of_parameters().
4383 return -2;
4384 }
4386 unsigned int args_size = 0;
4387 char buf[fixed_buffer_size];
4388 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4389 unsigned int length = signature->utf8_length();
4390 char* nextp;
4392 // The first character must be a '('
4393 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4394 length--;
4395 // Skip over legal field signatures
4396 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4397 while ((length > 0) && (nextp != NULL)) {
4398 args_size++;
4399 if (p[0] == 'J' || p[0] == 'D') {
4400 args_size++;
4401 }
4402 length -= nextp - p;
4403 p = nextp;
4404 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4405 }
4406 // The first non-signature thing better be a ')'
4407 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4408 length--;
4409 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4410 // All internal methods must return void
4411 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4412 return args_size;
4413 }
4414 } else {
4415 // Now we better just have a return value
4416 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4417 if (nextp && ((int)length == (nextp - p))) {
4418 return args_size;
4419 }
4420 }
4421 }
4422 }
4423 // Report error
4424 throwIllegalSignature("Method", name, signature, CHECK_0);
4425 return 0;
4426 }
4429 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4430 // Method names also may not contain the characters '<' or '>', unless <init>
4431 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4432 // method. Because these names have been checked as special cases before
4433 // calling this method in verify_legal_method_name.
4434 bool ClassFileParser::verify_unqualified_name(
4435 char* name, unsigned int length, int type) {
4436 jchar ch;
4438 for (char* p = name; p != name + length; ) {
4439 ch = *p;
4440 if (ch < 128) {
4441 p++;
4442 if (ch == '.' || ch == ';' || ch == '[' ) {
4443 return false; // do not permit '.', ';', or '['
4444 }
4445 if (type != LegalClass && ch == '/') {
4446 return false; // do not permit '/' unless it's class name
4447 }
4448 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4449 return false; // do not permit '<' or '>' in method names
4450 }
4451 } else {
4452 char* tmp_p = UTF8::next(p, &ch);
4453 p = tmp_p;
4454 }
4455 }
4456 return true;
4457 }
4460 // Take pointer to a string. Skip over the longest part of the string that could
4461 // be taken as a fieldname. Allow '/' if slash_ok is true.
4462 // Return a pointer to just past the fieldname.
4463 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4464 // being true, we saw consecutive slashes (meaning we were looking for a
4465 // qualified path but found something that was badly-formed).
4466 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4467 char* p;
4468 jchar ch;
4469 jboolean last_is_slash = false;
4470 jboolean not_first_ch = false;
4472 for (p = name; p != name + length; not_first_ch = true) {
4473 char* old_p = p;
4474 ch = *p;
4475 if (ch < 128) {
4476 p++;
4477 // quick check for ascii
4478 if ((ch >= 'a' && ch <= 'z') ||
4479 (ch >= 'A' && ch <= 'Z') ||
4480 (ch == '_' || ch == '$') ||
4481 (not_first_ch && ch >= '0' && ch <= '9')) {
4482 last_is_slash = false;
4483 continue;
4484 }
4485 if (slash_ok && ch == '/') {
4486 if (last_is_slash) {
4487 return NULL; // Don't permit consecutive slashes
4488 }
4489 last_is_slash = true;
4490 continue;
4491 }
4492 } else {
4493 jint unicode_ch;
4494 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4495 p = tmp_p;
4496 last_is_slash = false;
4497 // Check if ch is Java identifier start or is Java identifier part
4498 // 4672820: call java.lang.Character methods directly without generating separate tables.
4499 EXCEPTION_MARK;
4500 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4502 // return value
4503 JavaValue result(T_BOOLEAN);
4504 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4505 JavaCallArguments args;
4506 args.push_int(unicode_ch);
4508 // public static boolean isJavaIdentifierStart(char ch);
4509 JavaCalls::call_static(&result,
4510 klass,
4511 vmSymbolHandles::isJavaIdentifierStart_name(),
4512 vmSymbolHandles::int_bool_signature(),
4513 &args,
4514 THREAD);
4516 if (HAS_PENDING_EXCEPTION) {
4517 CLEAR_PENDING_EXCEPTION;
4518 return 0;
4519 }
4520 if (result.get_jboolean()) {
4521 continue;
4522 }
4524 if (not_first_ch) {
4525 // public static boolean isJavaIdentifierPart(char ch);
4526 JavaCalls::call_static(&result,
4527 klass,
4528 vmSymbolHandles::isJavaIdentifierPart_name(),
4529 vmSymbolHandles::int_bool_signature(),
4530 &args,
4531 THREAD);
4533 if (HAS_PENDING_EXCEPTION) {
4534 CLEAR_PENDING_EXCEPTION;
4535 return 0;
4536 }
4538 if (result.get_jboolean()) {
4539 continue;
4540 }
4541 }
4542 }
4543 return (not_first_ch) ? old_p : NULL;
4544 }
4545 return (not_first_ch) ? p : NULL;
4546 }
4549 // Take pointer to a string. Skip over the longest part of the string that could
4550 // be taken as a field signature. Allow "void" if void_ok.
4551 // Return a pointer to just past the signature.
4552 // Return NULL if no legal signature is found.
4553 char* ClassFileParser::skip_over_field_signature(char* signature,
4554 bool void_ok,
4555 unsigned int length,
4556 TRAPS) {
4557 unsigned int array_dim = 0;
4558 while (length > 0) {
4559 switch (signature[0]) {
4560 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4561 case JVM_SIGNATURE_BOOLEAN:
4562 case JVM_SIGNATURE_BYTE:
4563 case JVM_SIGNATURE_CHAR:
4564 case JVM_SIGNATURE_SHORT:
4565 case JVM_SIGNATURE_INT:
4566 case JVM_SIGNATURE_FLOAT:
4567 case JVM_SIGNATURE_LONG:
4568 case JVM_SIGNATURE_DOUBLE:
4569 return signature + 1;
4570 case JVM_SIGNATURE_CLASS: {
4571 if (_major_version < JAVA_1_5_VERSION) {
4572 // Skip over the class name if one is there
4573 char* p = skip_over_field_name(signature + 1, true, --length);
4575 // The next character better be a semicolon
4576 if (p && (p - signature) > 1 && p[0] == ';') {
4577 return p + 1;
4578 }
4579 } else {
4580 // 4900761: For class version > 48, any unicode is allowed in class name.
4581 length--;
4582 signature++;
4583 while (length > 0 && signature[0] != ';') {
4584 if (signature[0] == '.') {
4585 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4586 }
4587 length--;
4588 signature++;
4589 }
4590 if (signature[0] == ';') { return signature + 1; }
4591 }
4593 return NULL;
4594 }
4595 case JVM_SIGNATURE_ARRAY:
4596 array_dim++;
4597 if (array_dim > 255) {
4598 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4599 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4600 }
4601 // The rest of what's there better be a legal signature
4602 signature++;
4603 length--;
4604 void_ok = false;
4605 break;
4607 default:
4608 return NULL;
4609 }
4610 }
4611 return NULL;
4612 }