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--- old/src/share/vm/classfile/classFileParser.cpp
+++ new/src/share/vm/classfile/classFileParser.cpp
1 1 /*
2 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #include "precompiled.hpp"
26 26 #include "classfile/classFileParser.hpp"
27 27 #include "classfile/classLoader.hpp"
28 28 #include "classfile/javaClasses.hpp"
29 29 #include "classfile/symbolTable.hpp"
30 30 #include "classfile/systemDictionary.hpp"
31 31 #include "classfile/verificationType.hpp"
32 32 #include "classfile/verifier.hpp"
33 33 #include "classfile/vmSymbols.hpp"
34 34 #include "memory/allocation.hpp"
35 35 #include "memory/gcLocker.hpp"
36 36 #include "memory/oopFactory.hpp"
37 37 #include "memory/universe.inline.hpp"
38 38 #include "oops/constantPoolOop.hpp"
39 39 #include "oops/instanceKlass.hpp"
40 40 #include "oops/instanceMirrorKlass.hpp"
41 41 #include "oops/klass.inline.hpp"
42 42 #include "oops/klassOop.hpp"
43 43 #include "oops/klassVtable.hpp"
44 44 #include "oops/methodOop.hpp"
45 45 #include "oops/symbol.hpp"
46 46 #include "prims/jvmtiExport.hpp"
47 47 #include "runtime/javaCalls.hpp"
48 48 #include "runtime/perfData.hpp"
49 49 #include "runtime/reflection.hpp"
50 50 #include "runtime/signature.hpp"
51 51 #include "runtime/timer.hpp"
52 52 #include "services/classLoadingService.hpp"
53 53 #include "services/threadService.hpp"
54 54
55 55 // We generally try to create the oops directly when parsing, rather than
56 56 // allocating temporary data structures and copying the bytes twice. A
57 57 // temporary area is only needed when parsing utf8 entries in the constant
58 58 // pool and when parsing line number tables.
59 59
60 60 // We add assert in debug mode when class format is not checked.
61 61
62 62 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
63 63 #define JAVA_MIN_SUPPORTED_VERSION 45
64 64 #define JAVA_MAX_SUPPORTED_VERSION 51
65 65 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
66 66
67 67 // Used for two backward compatibility reasons:
68 68 // - to check for new additions to the class file format in JDK1.5
69 69 // - to check for bug fixes in the format checker in JDK1.5
70 70 #define JAVA_1_5_VERSION 49
71 71
72 72 // Used for backward compatibility reasons:
73 73 // - to check for javac bug fixes that happened after 1.5
74 74 // - also used as the max version when running in jdk6
75 75 #define JAVA_6_VERSION 50
76 76
77 77 // Used for backward compatibility reasons:
78 78 // - to check NameAndType_info signatures more aggressively
79 79 #define JAVA_7_VERSION 51
80 80
81 81
82 82 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
83 83 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
84 84 // this function (_current can be allocated in a register, with scalar
85 85 // replacement of aggregates). The _current pointer is copied back to
86 86 // stream() when this function returns. DON'T call another method within
87 87 // this method that uses stream().
88 88 ClassFileStream* cfs0 = stream();
89 89 ClassFileStream cfs1 = *cfs0;
90 90 ClassFileStream* cfs = &cfs1;
91 91 #ifdef ASSERT
92 92 assert(cfs->allocated_on_stack(),"should be local");
93 93 u1* old_current = cfs0->current();
94 94 #endif
95 95
96 96 // Used for batching symbol allocations.
97 97 const char* names[SymbolTable::symbol_alloc_batch_size];
98 98 int lengths[SymbolTable::symbol_alloc_batch_size];
99 99 int indices[SymbolTable::symbol_alloc_batch_size];
100 100 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
101 101 int names_count = 0;
102 102
103 103 // parsing Index 0 is unused
104 104 for (int index = 1; index < length; index++) {
105 105 // Each of the following case guarantees one more byte in the stream
106 106 // for the following tag or the access_flags following constant pool,
107 107 // so we don't need bounds-check for reading tag.
108 108 u1 tag = cfs->get_u1_fast();
109 109 switch (tag) {
110 110 case JVM_CONSTANT_Class :
111 111 {
112 112 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
113 113 u2 name_index = cfs->get_u2_fast();
114 114 cp->klass_index_at_put(index, name_index);
115 115 }
116 116 break;
117 117 case JVM_CONSTANT_Fieldref :
118 118 {
119 119 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
120 120 u2 class_index = cfs->get_u2_fast();
121 121 u2 name_and_type_index = cfs->get_u2_fast();
122 122 cp->field_at_put(index, class_index, name_and_type_index);
123 123 }
124 124 break;
125 125 case JVM_CONSTANT_Methodref :
126 126 {
127 127 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
128 128 u2 class_index = cfs->get_u2_fast();
129 129 u2 name_and_type_index = cfs->get_u2_fast();
130 130 cp->method_at_put(index, class_index, name_and_type_index);
131 131 }
132 132 break;
133 133 case JVM_CONSTANT_InterfaceMethodref :
134 134 {
135 135 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
136 136 u2 class_index = cfs->get_u2_fast();
137 137 u2 name_and_type_index = cfs->get_u2_fast();
138 138 cp->interface_method_at_put(index, class_index, name_and_type_index);
139 139 }
140 140 break;
141 141 case JVM_CONSTANT_String :
142 142 {
143 143 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
144 144 u2 string_index = cfs->get_u2_fast();
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145 145 cp->string_index_at_put(index, string_index);
146 146 }
147 147 break;
148 148 case JVM_CONSTANT_MethodHandle :
149 149 case JVM_CONSTANT_MethodType :
150 150 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
151 151 classfile_parse_error(
152 152 "Class file version does not support constant tag %u in class file %s",
153 153 tag, CHECK);
154 154 }
155 - if (!EnableMethodHandles) {
155 + if (!EnableInvokeDynamic) {
156 156 classfile_parse_error(
157 157 "This JVM does not support constant tag %u in class file %s",
158 158 tag, CHECK);
159 159 }
160 160 if (tag == JVM_CONSTANT_MethodHandle) {
161 161 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
162 162 u1 ref_kind = cfs->get_u1_fast();
163 163 u2 method_index = cfs->get_u2_fast();
164 164 cp->method_handle_index_at_put(index, ref_kind, method_index);
165 165 } else if (tag == JVM_CONSTANT_MethodType) {
166 166 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
167 167 u2 signature_index = cfs->get_u2_fast();
168 168 cp->method_type_index_at_put(index, signature_index);
169 169 } else {
170 170 ShouldNotReachHere();
171 171 }
172 172 break;
173 173 case JVM_CONSTANT_InvokeDynamicTrans : // this tag appears only in old classfiles
174 174 case JVM_CONSTANT_InvokeDynamic :
175 175 {
176 176 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
177 177 classfile_parse_error(
178 178 "Class file version does not support constant tag %u in class file %s",
179 179 tag, CHECK);
180 180 }
181 181 if (!EnableInvokeDynamic) {
182 182 classfile_parse_error(
183 183 "This JVM does not support constant tag %u in class file %s",
184 184 tag, CHECK);
185 185 }
186 186 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
187 187 u2 bootstrap_specifier_index = cfs->get_u2_fast();
188 188 u2 name_and_type_index = cfs->get_u2_fast();
189 189 if (tag == JVM_CONSTANT_InvokeDynamicTrans) {
190 190 if (!AllowTransitionalJSR292)
191 191 classfile_parse_error(
192 192 "This JVM does not support transitional InvokeDynamic tag %u in class file %s",
193 193 tag, CHECK);
194 194 cp->invoke_dynamic_trans_at_put(index, bootstrap_specifier_index, name_and_type_index);
195 195 break;
196 196 }
197 197 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
198 198 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
199 199 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
200 200 }
201 201 break;
202 202 case JVM_CONSTANT_Integer :
203 203 {
204 204 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
205 205 u4 bytes = cfs->get_u4_fast();
206 206 cp->int_at_put(index, (jint) bytes);
207 207 }
208 208 break;
209 209 case JVM_CONSTANT_Float :
210 210 {
211 211 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
212 212 u4 bytes = cfs->get_u4_fast();
213 213 cp->float_at_put(index, *(jfloat*)&bytes);
214 214 }
215 215 break;
216 216 case JVM_CONSTANT_Long :
217 217 // A mangled type might cause you to overrun allocated memory
218 218 guarantee_property(index+1 < length,
219 219 "Invalid constant pool entry %u in class file %s",
220 220 index, CHECK);
221 221 {
222 222 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
223 223 u8 bytes = cfs->get_u8_fast();
224 224 cp->long_at_put(index, bytes);
225 225 }
226 226 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
227 227 break;
228 228 case JVM_CONSTANT_Double :
229 229 // A mangled type might cause you to overrun allocated memory
230 230 guarantee_property(index+1 < length,
231 231 "Invalid constant pool entry %u in class file %s",
232 232 index, CHECK);
233 233 {
234 234 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
235 235 u8 bytes = cfs->get_u8_fast();
236 236 cp->double_at_put(index, *(jdouble*)&bytes);
237 237 }
238 238 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
239 239 break;
240 240 case JVM_CONSTANT_NameAndType :
241 241 {
242 242 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
243 243 u2 name_index = cfs->get_u2_fast();
244 244 u2 signature_index = cfs->get_u2_fast();
245 245 cp->name_and_type_at_put(index, name_index, signature_index);
246 246 }
247 247 break;
248 248 case JVM_CONSTANT_Utf8 :
249 249 {
250 250 cfs->guarantee_more(2, CHECK); // utf8_length
251 251 u2 utf8_length = cfs->get_u2_fast();
252 252 u1* utf8_buffer = cfs->get_u1_buffer();
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253 253 assert(utf8_buffer != NULL, "null utf8 buffer");
254 254 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
255 255 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
256 256 cfs->skip_u1_fast(utf8_length);
257 257
258 258 // Before storing the symbol, make sure it's legal
259 259 if (_need_verify) {
260 260 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
261 261 }
262 262
263 - if (AnonymousClasses && has_cp_patch_at(index)) {
263 + if (EnableInvokeDynamic && has_cp_patch_at(index)) {
264 264 Handle patch = clear_cp_patch_at(index);
265 265 guarantee_property(java_lang_String::is_instance(patch()),
266 266 "Illegal utf8 patch at %d in class file %s",
267 267 index, CHECK);
268 268 char* str = java_lang_String::as_utf8_string(patch());
269 269 // (could use java_lang_String::as_symbol instead, but might as well batch them)
270 270 utf8_buffer = (u1*) str;
271 271 utf8_length = (int) strlen(str);
272 272 }
273 273
274 274 unsigned int hash;
275 275 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
276 276 if (result == NULL) {
277 277 names[names_count] = (char*)utf8_buffer;
278 278 lengths[names_count] = utf8_length;
279 279 indices[names_count] = index;
280 280 hashValues[names_count++] = hash;
281 281 if (names_count == SymbolTable::symbol_alloc_batch_size) {
282 282 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
283 283 names_count = 0;
284 284 }
285 285 } else {
286 286 cp->symbol_at_put(index, result);
287 287 }
288 288 }
289 289 break;
290 290 default:
291 291 classfile_parse_error(
292 292 "Unknown constant tag %u in class file %s", tag, CHECK);
293 293 break;
294 294 }
295 295 }
296 296
297 297 // Allocate the remaining symbols
298 298 if (names_count > 0) {
299 299 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
300 300 }
301 301
302 302 // Copy _current pointer of local copy back to stream().
303 303 #ifdef ASSERT
304 304 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
305 305 #endif
306 306 cfs0->set_current(cfs1.current());
307 307 }
308 308
309 309 // This class unreferences constant pool symbols if an error has occurred
310 310 // while parsing the class before it is assigned into the class.
311 311 // If it gets an error after that it is unloaded and the constant pool will
312 312 // be cleaned up then.
313 313 class ConstantPoolCleaner : public StackObj {
314 314 constantPoolHandle _cphandle;
315 315 bool _in_error;
316 316 public:
317 317 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
318 318 ~ConstantPoolCleaner() {
319 319 if (_in_error && _cphandle.not_null()) {
320 320 _cphandle->unreference_symbols();
321 321 }
322 322 }
323 323 void set_in_error(bool clean) { _in_error = clean; }
324 324 };
325 325
326 326 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
327 327
328 328 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
329 329 ClassFileStream* cfs = stream();
330 330 constantPoolHandle nullHandle;
331 331
332 332 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
333 333 u2 length = cfs->get_u2_fast();
334 334 guarantee_property(
335 335 length >= 1, "Illegal constant pool size %u in class file %s",
336 336 length, CHECK_(nullHandle));
337 337 constantPoolOop constant_pool =
338 338 oopFactory::new_constantPool(length,
339 339 oopDesc::IsSafeConc,
340 340 CHECK_(nullHandle));
341 341 constantPoolHandle cp (THREAD, constant_pool);
342 342
343 343 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
344 344 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
345 345
346 346 // parsing constant pool entries
347 347 parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
348 348
349 349 int index = 1; // declared outside of loops for portability
350 350
351 351 // first verification pass - validate cross references and fixup class and string constants
352 352 for (index = 1; index < length; index++) { // Index 0 is unused
353 353 jbyte tag = cp->tag_at(index).value();
354 354 switch (tag) {
355 355 case JVM_CONSTANT_Class :
356 356 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
357 357 break;
358 358 case JVM_CONSTANT_Fieldref :
359 359 // fall through
360 360 case JVM_CONSTANT_Methodref :
361 361 // fall through
362 362 case JVM_CONSTANT_InterfaceMethodref : {
363 363 if (!_need_verify) break;
364 364 int klass_ref_index = cp->klass_ref_index_at(index);
365 365 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
366 366 check_property(valid_cp_range(klass_ref_index, length) &&
367 367 is_klass_reference(cp, klass_ref_index),
368 368 "Invalid constant pool index %u in class file %s",
369 369 klass_ref_index,
370 370 CHECK_(nullHandle));
371 371 check_property(valid_cp_range(name_and_type_ref_index, length) &&
372 372 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
373 373 "Invalid constant pool index %u in class file %s",
374 374 name_and_type_ref_index,
375 375 CHECK_(nullHandle));
376 376 break;
377 377 }
378 378 case JVM_CONSTANT_String :
379 379 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
380 380 break;
381 381 case JVM_CONSTANT_Integer :
382 382 break;
383 383 case JVM_CONSTANT_Float :
384 384 break;
385 385 case JVM_CONSTANT_Long :
386 386 case JVM_CONSTANT_Double :
387 387 index++;
388 388 check_property(
389 389 (index < length && cp->tag_at(index).is_invalid()),
390 390 "Improper constant pool long/double index %u in class file %s",
391 391 index, CHECK_(nullHandle));
392 392 break;
393 393 case JVM_CONSTANT_NameAndType : {
394 394 if (!_need_verify) break;
395 395 int name_ref_index = cp->name_ref_index_at(index);
396 396 int signature_ref_index = cp->signature_ref_index_at(index);
397 397 check_property(
398 398 valid_cp_range(name_ref_index, length) &&
399 399 cp->tag_at(name_ref_index).is_utf8(),
400 400 "Invalid constant pool index %u in class file %s",
401 401 name_ref_index, CHECK_(nullHandle));
402 402 check_property(
403 403 valid_cp_range(signature_ref_index, length) &&
404 404 cp->tag_at(signature_ref_index).is_utf8(),
405 405 "Invalid constant pool index %u in class file %s",
406 406 signature_ref_index, CHECK_(nullHandle));
407 407 break;
408 408 }
409 409 case JVM_CONSTANT_Utf8 :
410 410 break;
411 411 case JVM_CONSTANT_UnresolvedClass : // fall-through
412 412 case JVM_CONSTANT_UnresolvedClassInError:
413 413 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
414 414 break;
415 415 case JVM_CONSTANT_ClassIndex :
416 416 {
417 417 int class_index = cp->klass_index_at(index);
418 418 check_property(
419 419 valid_cp_range(class_index, length) &&
420 420 cp->tag_at(class_index).is_utf8(),
421 421 "Invalid constant pool index %u in class file %s",
422 422 class_index, CHECK_(nullHandle));
423 423 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
424 424 }
425 425 break;
426 426 case JVM_CONSTANT_UnresolvedString :
427 427 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
428 428 break;
429 429 case JVM_CONSTANT_StringIndex :
430 430 {
431 431 int string_index = cp->string_index_at(index);
432 432 check_property(
433 433 valid_cp_range(string_index, length) &&
434 434 cp->tag_at(string_index).is_utf8(),
435 435 "Invalid constant pool index %u in class file %s",
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436 436 string_index, CHECK_(nullHandle));
437 437 Symbol* sym = cp->symbol_at(string_index);
438 438 cp->unresolved_string_at_put(index, sym);
439 439 }
440 440 break;
441 441 case JVM_CONSTANT_MethodHandle :
442 442 {
443 443 int ref_index = cp->method_handle_index_at(index);
444 444 check_property(
445 445 valid_cp_range(ref_index, length) &&
446 - EnableMethodHandles,
446 + EnableInvokeDynamic,
447 447 "Invalid constant pool index %u in class file %s",
448 448 ref_index, CHECK_(nullHandle));
449 449 constantTag tag = cp->tag_at(ref_index);
450 450 int ref_kind = cp->method_handle_ref_kind_at(index);
451 451 switch (ref_kind) {
452 452 case JVM_REF_getField:
453 453 case JVM_REF_getStatic:
454 454 case JVM_REF_putField:
455 455 case JVM_REF_putStatic:
456 456 check_property(
457 457 tag.is_field(),
458 458 "Invalid constant pool index %u in class file %s (not a field)",
459 459 ref_index, CHECK_(nullHandle));
460 460 break;
461 461 case JVM_REF_invokeVirtual:
462 462 case JVM_REF_invokeStatic:
463 463 case JVM_REF_invokeSpecial:
464 464 case JVM_REF_newInvokeSpecial:
465 465 check_property(
466 466 tag.is_method(),
467 467 "Invalid constant pool index %u in class file %s (not a method)",
468 468 ref_index, CHECK_(nullHandle));
469 469 break;
470 470 case JVM_REF_invokeInterface:
471 471 check_property(
472 472 tag.is_interface_method(),
473 473 "Invalid constant pool index %u in class file %s (not an interface method)",
474 474 ref_index, CHECK_(nullHandle));
475 475 break;
476 476 default:
477 477 classfile_parse_error(
478 478 "Bad method handle kind at constant pool index %u in class file %s",
479 479 index, CHECK_(nullHandle));
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480 480 }
481 481 // Keep the ref_index unchanged. It will be indirected at link-time.
482 482 }
483 483 break;
484 484 case JVM_CONSTANT_MethodType :
485 485 {
486 486 int ref_index = cp->method_type_index_at(index);
487 487 check_property(
488 488 valid_cp_range(ref_index, length) &&
489 489 cp->tag_at(ref_index).is_utf8() &&
490 - EnableMethodHandles,
490 + EnableInvokeDynamic,
491 491 "Invalid constant pool index %u in class file %s",
492 492 ref_index, CHECK_(nullHandle));
493 493 }
494 494 break;
495 495 case JVM_CONSTANT_InvokeDynamicTrans :
496 496 case JVM_CONSTANT_InvokeDynamic :
497 497 {
498 498 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
499 499 check_property(valid_cp_range(name_and_type_ref_index, length) &&
500 500 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
501 501 "Invalid constant pool index %u in class file %s",
502 502 name_and_type_ref_index,
503 503 CHECK_(nullHandle));
504 504 if (tag == JVM_CONSTANT_InvokeDynamicTrans) {
505 505 int bootstrap_method_ref_index = cp->invoke_dynamic_bootstrap_method_ref_index_at(index);
506 506 check_property(valid_cp_range(bootstrap_method_ref_index, length) &&
507 507 cp->tag_at(bootstrap_method_ref_index).is_method_handle(),
508 508 "Invalid constant pool index %u in class file %s",
509 509 bootstrap_method_ref_index,
510 510 CHECK_(nullHandle));
511 511 }
512 512 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
513 513 break;
514 514 }
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515 515 default:
516 516 fatal(err_msg("bad constant pool tag value %u",
517 517 cp->tag_at(index).value()));
518 518 ShouldNotReachHere();
519 519 break;
520 520 } // end of switch
521 521 } // end of for
522 522
523 523 if (_cp_patches != NULL) {
524 524 // need to treat this_class specially...
525 - assert(AnonymousClasses, "");
525 + assert(EnableInvokeDynamic, "");
526 526 int this_class_index;
527 527 {
528 528 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
529 529 u1* mark = cfs->current();
530 530 u2 flags = cfs->get_u2_fast();
531 531 this_class_index = cfs->get_u2_fast();
532 532 cfs->set_current(mark); // revert to mark
533 533 }
534 534
535 535 for (index = 1; index < length; index++) { // Index 0 is unused
536 536 if (has_cp_patch_at(index)) {
537 537 guarantee_property(index != this_class_index,
538 538 "Illegal constant pool patch to self at %d in class file %s",
539 539 index, CHECK_(nullHandle));
540 540 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
541 541 }
542 542 }
543 543 // Ensure that all the patches have been used.
544 544 for (index = 0; index < _cp_patches->length(); index++) {
545 545 guarantee_property(!has_cp_patch_at(index),
546 546 "Unused constant pool patch at %d in class file %s",
547 547 index, CHECK_(nullHandle));
548 548 }
549 549 }
550 550
551 551 if (!_need_verify) {
552 552 cp_in_error.set_in_error(false);
553 553 return cp;
554 554 }
555 555
556 556 // second verification pass - checks the strings are of the right format.
557 557 // but not yet to the other entries
558 558 for (index = 1; index < length; index++) {
559 559 jbyte tag = cp->tag_at(index).value();
560 560 switch (tag) {
561 561 case JVM_CONSTANT_UnresolvedClass: {
562 562 Symbol* class_name = cp->unresolved_klass_at(index);
563 563 // check the name, even if _cp_patches will overwrite it
564 564 verify_legal_class_name(class_name, CHECK_(nullHandle));
565 565 break;
566 566 }
567 567 case JVM_CONSTANT_NameAndType: {
568 568 if (_need_verify && _major_version >= JAVA_7_VERSION) {
569 569 int sig_index = cp->signature_ref_index_at(index);
570 570 int name_index = cp->name_ref_index_at(index);
571 571 Symbol* name = cp->symbol_at(name_index);
572 572 Symbol* sig = cp->symbol_at(sig_index);
573 573 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
574 574 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
575 575 } else {
576 576 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
577 577 }
578 578 }
579 579 break;
580 580 }
581 581 case JVM_CONSTANT_Fieldref:
582 582 case JVM_CONSTANT_Methodref:
583 583 case JVM_CONSTANT_InterfaceMethodref: {
584 584 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
585 585 // already verified to be utf8
586 586 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
587 587 // already verified to be utf8
588 588 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
589 589 Symbol* name = cp->symbol_at(name_ref_index);
590 590 Symbol* signature = cp->symbol_at(signature_ref_index);
591 591 if (tag == JVM_CONSTANT_Fieldref) {
592 592 verify_legal_field_name(name, CHECK_(nullHandle));
593 593 if (_need_verify && _major_version >= JAVA_7_VERSION) {
594 594 // Signature is verified above, when iterating NameAndType_info.
595 595 // Need only to be sure it's the right type.
596 596 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
597 597 throwIllegalSignature(
598 598 "Field", name, signature, CHECK_(nullHandle));
599 599 }
600 600 } else {
601 601 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
602 602 }
603 603 } else {
604 604 verify_legal_method_name(name, CHECK_(nullHandle));
605 605 if (_need_verify && _major_version >= JAVA_7_VERSION) {
606 606 // Signature is verified above, when iterating NameAndType_info.
607 607 // Need only to be sure it's the right type.
608 608 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
609 609 throwIllegalSignature(
610 610 "Method", name, signature, CHECK_(nullHandle));
611 611 }
612 612 } else {
613 613 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
614 614 }
615 615 if (tag == JVM_CONSTANT_Methodref) {
616 616 // 4509014: If a class method name begins with '<', it must be "<init>".
617 617 assert(name != NULL, "method name in constant pool is null");
618 618 unsigned int name_len = name->utf8_length();
619 619 assert(name_len > 0, "bad method name"); // already verified as legal name
620 620 if (name->byte_at(0) == '<') {
621 621 if (name != vmSymbols::object_initializer_name()) {
622 622 classfile_parse_error(
623 623 "Bad method name at constant pool index %u in class file %s",
624 624 name_ref_index, CHECK_(nullHandle));
625 625 }
626 626 }
627 627 }
628 628 }
629 629 break;
630 630 }
631 631 case JVM_CONSTANT_MethodHandle: {
632 632 int ref_index = cp->method_handle_index_at(index);
633 633 int ref_kind = cp->method_handle_ref_kind_at(index);
634 634 switch (ref_kind) {
635 635 case JVM_REF_invokeVirtual:
636 636 case JVM_REF_invokeStatic:
637 637 case JVM_REF_invokeSpecial:
638 638 case JVM_REF_newInvokeSpecial:
639 639 {
640 640 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
641 641 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
642 642 Symbol* name = cp->symbol_at(name_ref_index);
643 643 if (ref_kind == JVM_REF_newInvokeSpecial) {
644 644 if (name != vmSymbols::object_initializer_name()) {
645 645 classfile_parse_error(
646 646 "Bad constructor name at constant pool index %u in class file %s",
647 647 name_ref_index, CHECK_(nullHandle));
648 648 }
649 649 } else {
650 650 if (name == vmSymbols::object_initializer_name()) {
651 651 classfile_parse_error(
652 652 "Bad method name at constant pool index %u in class file %s",
653 653 name_ref_index, CHECK_(nullHandle));
654 654 }
655 655 }
656 656 }
657 657 break;
658 658 // Other ref_kinds are already fully checked in previous pass.
659 659 }
660 660 break;
661 661 }
662 662 case JVM_CONSTANT_MethodType: {
663 663 Symbol* no_name = vmSymbols::type_name(); // place holder
664 664 Symbol* signature = cp->method_type_signature_at(index);
665 665 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
666 666 break;
667 667 }
668 668 case JVM_CONSTANT_Utf8: {
669 669 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
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670 670 }
671 671 } // end of switch
672 672 } // end of for
673 673
674 674 cp_in_error.set_in_error(false);
675 675 return cp;
676 676 }
677 677
678 678
679 679 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
680 - assert(AnonymousClasses, "");
680 + assert(EnableInvokeDynamic, "");
681 681 BasicType patch_type = T_VOID;
682 682 switch (cp->tag_at(index).value()) {
683 683
684 684 case JVM_CONSTANT_UnresolvedClass :
685 685 // Patching a class means pre-resolving it.
686 686 // The name in the constant pool is ignored.
687 687 if (java_lang_Class::is_instance(patch())) {
688 688 guarantee_property(!java_lang_Class::is_primitive(patch()),
689 689 "Illegal class patch at %d in class file %s",
690 690 index, CHECK);
691 691 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch()));
692 692 } else {
693 693 guarantee_property(java_lang_String::is_instance(patch()),
694 694 "Illegal class patch at %d in class file %s",
695 695 index, CHECK);
696 696 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
697 697 cp->unresolved_klass_at_put(index, name);
698 698 }
699 699 break;
700 700
701 701 case JVM_CONSTANT_UnresolvedString :
702 702 // Patching a string means pre-resolving it.
703 703 // The spelling in the constant pool is ignored.
704 704 // The constant reference may be any object whatever.
705 705 // If it is not a real interned string, the constant is referred
706 706 // to as a "pseudo-string", and must be presented to the CP
707 707 // explicitly, because it may require scavenging.
708 708 cp->pseudo_string_at_put(index, patch());
709 709 break;
710 710
711 711 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
712 712 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
713 713 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
714 714 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
715 715 patch_prim:
716 716 {
717 717 jvalue value;
718 718 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
719 719 guarantee_property(value_type == patch_type,
720 720 "Illegal primitive patch at %d in class file %s",
721 721 index, CHECK);
722 722 switch (value_type) {
723 723 case T_INT: cp->int_at_put(index, value.i); break;
724 724 case T_FLOAT: cp->float_at_put(index, value.f); break;
725 725 case T_LONG: cp->long_at_put(index, value.j); break;
726 726 case T_DOUBLE: cp->double_at_put(index, value.d); break;
727 727 default: assert(false, "");
728 728 }
729 729 }
730 730 break;
731 731
732 732 default:
733 733 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
734 734 guarantee_property(!has_cp_patch_at(index),
735 735 "Illegal unexpected patch at %d in class file %s",
736 736 index, CHECK);
737 737 return;
738 738 }
739 739
740 740 // On fall-through, mark the patch as used.
741 741 clear_cp_patch_at(index);
742 742 }
743 743
744 744
745 745
746 746 class NameSigHash: public ResourceObj {
747 747 public:
748 748 Symbol* _name; // name
749 749 Symbol* _sig; // signature
750 750 NameSigHash* _next; // Next entry in hash table
751 751 };
752 752
753 753
754 754 #define HASH_ROW_SIZE 256
755 755
756 756 unsigned int hash(Symbol* name, Symbol* sig) {
757 757 unsigned int raw_hash = 0;
758 758 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
759 759 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
760 760
761 761 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
762 762 }
763 763
764 764
765 765 void initialize_hashtable(NameSigHash** table) {
766 766 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
767 767 }
768 768
769 769 // Return false if the name/sig combination is found in table.
770 770 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
771 771 // The old format checker uses heap sort to find duplicates.
772 772 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
773 773 // of table since we don't expect Symbol*'s to move.
774 774 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
775 775 assert(name != NULL, "name in constant pool is NULL");
776 776
777 777 // First lookup for duplicates
778 778 int index = hash(name, sig);
779 779 NameSigHash* entry = table[index];
780 780 while (entry != NULL) {
781 781 if (entry->_name == name && entry->_sig == sig) {
782 782 return false;
783 783 }
784 784 entry = entry->_next;
785 785 }
786 786
787 787 // No duplicate is found, allocate a new entry and fill it.
788 788 entry = new NameSigHash();
789 789 entry->_name = name;
790 790 entry->_sig = sig;
791 791
792 792 // Insert into hash table
793 793 entry->_next = table[index];
794 794 table[index] = entry;
795 795
796 796 return true;
797 797 }
798 798
799 799
800 800 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
801 801 int length,
802 802 Handle class_loader,
803 803 Handle protection_domain,
804 804 Symbol* class_name,
805 805 TRAPS) {
806 806 ClassFileStream* cfs = stream();
807 807 assert(length > 0, "only called for length>0");
808 808 objArrayHandle nullHandle;
809 809 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
810 810 objArrayHandle interfaces (THREAD, interface_oop);
811 811
812 812 int index;
813 813 for (index = 0; index < length; index++) {
814 814 u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
815 815 KlassHandle interf;
816 816 check_property(
817 817 valid_cp_range(interface_index, cp->length()) &&
818 818 is_klass_reference(cp, interface_index),
819 819 "Interface name has bad constant pool index %u in class file %s",
820 820 interface_index, CHECK_(nullHandle));
821 821 if (cp->tag_at(interface_index).is_klass()) {
822 822 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
823 823 } else {
824 824 Symbol* unresolved_klass = cp->klass_name_at(interface_index);
825 825
826 826 // Don't need to check legal name because it's checked when parsing constant pool.
827 827 // But need to make sure it's not an array type.
828 828 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
829 829 "Bad interface name in class file %s", CHECK_(nullHandle));
830 830
831 831 // Call resolve_super so classcircularity is checked
832 832 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
833 833 unresolved_klass, class_loader, protection_domain,
834 834 false, CHECK_(nullHandle));
835 835 interf = KlassHandle(THREAD, k);
836 836
837 837 if (LinkWellKnownClasses) // my super type is well known to me
838 838 cp->klass_at_put(interface_index, interf()); // eagerly resolve
839 839 }
840 840
841 841 if (!Klass::cast(interf())->is_interface()) {
842 842 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
843 843 }
844 844 interfaces->obj_at_put(index, interf());
845 845 }
846 846
847 847 if (!_need_verify || length <= 1) {
848 848 return interfaces;
849 849 }
850 850
851 851 // Check if there's any duplicates in interfaces
852 852 ResourceMark rm(THREAD);
853 853 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
854 854 THREAD, NameSigHash*, HASH_ROW_SIZE);
855 855 initialize_hashtable(interface_names);
856 856 bool dup = false;
857 857 {
858 858 debug_only(No_Safepoint_Verifier nsv;)
859 859 for (index = 0; index < length; index++) {
860 860 klassOop k = (klassOop)interfaces->obj_at(index);
861 861 Symbol* name = instanceKlass::cast(k)->name();
862 862 // If no duplicates, add (name, NULL) in hashtable interface_names.
863 863 if (!put_after_lookup(name, NULL, interface_names)) {
864 864 dup = true;
865 865 break;
866 866 }
867 867 }
868 868 }
869 869 if (dup) {
870 870 classfile_parse_error("Duplicate interface name in class file %s",
871 871 CHECK_(nullHandle));
872 872 }
873 873
874 874 return interfaces;
875 875 }
876 876
877 877
878 878 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
879 879 // Make sure the constant pool entry is of a type appropriate to this field
880 880 guarantee_property(
881 881 (constantvalue_index > 0 &&
882 882 constantvalue_index < cp->length()),
883 883 "Bad initial value index %u in ConstantValue attribute in class file %s",
884 884 constantvalue_index, CHECK);
885 885 constantTag value_type = cp->tag_at(constantvalue_index);
886 886 switch ( cp->basic_type_for_signature_at(signature_index) ) {
887 887 case T_LONG:
888 888 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
889 889 break;
890 890 case T_FLOAT:
891 891 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
892 892 break;
893 893 case T_DOUBLE:
894 894 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
895 895 break;
896 896 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
897 897 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
898 898 break;
899 899 case T_OBJECT:
900 900 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
901 901 && (value_type.is_string() || value_type.is_unresolved_string())),
902 902 "Bad string initial value in class file %s", CHECK);
903 903 break;
904 904 default:
905 905 classfile_parse_error(
906 906 "Unable to set initial value %u in class file %s",
907 907 constantvalue_index, CHECK);
908 908 }
909 909 }
910 910
911 911
912 912 // Parse attributes for a field.
913 913 void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
914 914 u2 attributes_count,
915 915 bool is_static, u2 signature_index,
916 916 u2* constantvalue_index_addr,
917 917 bool* is_synthetic_addr,
918 918 u2* generic_signature_index_addr,
919 919 typeArrayHandle* field_annotations,
920 920 TRAPS) {
921 921 ClassFileStream* cfs = stream();
922 922 assert(attributes_count > 0, "length should be greater than 0");
923 923 u2 constantvalue_index = 0;
924 924 u2 generic_signature_index = 0;
925 925 bool is_synthetic = false;
926 926 u1* runtime_visible_annotations = NULL;
927 927 int runtime_visible_annotations_length = 0;
928 928 u1* runtime_invisible_annotations = NULL;
929 929 int runtime_invisible_annotations_length = 0;
930 930 while (attributes_count--) {
931 931 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
932 932 u2 attribute_name_index = cfs->get_u2_fast();
933 933 u4 attribute_length = cfs->get_u4_fast();
934 934 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
935 935 cp->tag_at(attribute_name_index).is_utf8(),
936 936 "Invalid field attribute index %u in class file %s",
937 937 attribute_name_index,
938 938 CHECK);
939 939 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
940 940 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
941 941 // ignore if non-static
942 942 if (constantvalue_index != 0) {
943 943 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
944 944 }
945 945 check_property(
946 946 attribute_length == 2,
947 947 "Invalid ConstantValue field attribute length %u in class file %s",
948 948 attribute_length, CHECK);
949 949 constantvalue_index = cfs->get_u2(CHECK);
950 950 if (_need_verify) {
951 951 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
952 952 }
953 953 } else if (attribute_name == vmSymbols::tag_synthetic()) {
954 954 if (attribute_length != 0) {
955 955 classfile_parse_error(
956 956 "Invalid Synthetic field attribute length %u in class file %s",
957 957 attribute_length, CHECK);
958 958 }
959 959 is_synthetic = true;
960 960 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
961 961 if (attribute_length != 0) {
962 962 classfile_parse_error(
963 963 "Invalid Deprecated field attribute length %u in class file %s",
964 964 attribute_length, CHECK);
965 965 }
966 966 } else if (_major_version >= JAVA_1_5_VERSION) {
967 967 if (attribute_name == vmSymbols::tag_signature()) {
968 968 if (attribute_length != 2) {
969 969 classfile_parse_error(
970 970 "Wrong size %u for field's Signature attribute in class file %s",
971 971 attribute_length, CHECK);
972 972 }
973 973 generic_signature_index = cfs->get_u2(CHECK);
974 974 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
975 975 runtime_visible_annotations_length = attribute_length;
976 976 runtime_visible_annotations = cfs->get_u1_buffer();
977 977 assert(runtime_visible_annotations != NULL, "null visible annotations");
978 978 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
979 979 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
980 980 runtime_invisible_annotations_length = attribute_length;
981 981 runtime_invisible_annotations = cfs->get_u1_buffer();
982 982 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
983 983 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
984 984 } else {
985 985 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
986 986 }
987 987 } else {
988 988 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
989 989 }
990 990 }
991 991
992 992 *constantvalue_index_addr = constantvalue_index;
993 993 *is_synthetic_addr = is_synthetic;
994 994 *generic_signature_index_addr = generic_signature_index;
995 995 *field_annotations = assemble_annotations(runtime_visible_annotations,
996 996 runtime_visible_annotations_length,
997 997 runtime_invisible_annotations,
998 998 runtime_invisible_annotations_length,
999 999 CHECK);
1000 1000 return;
1001 1001 }
1002 1002
1003 1003
1004 1004 // Field allocation types. Used for computing field offsets.
1005 1005
1006 1006 enum FieldAllocationType {
1007 1007 STATIC_OOP, // Oops
1008 1008 STATIC_BYTE, // Boolean, Byte, char
1009 1009 STATIC_SHORT, // shorts
1010 1010 STATIC_WORD, // ints
1011 1011 STATIC_DOUBLE, // long or double
1012 1012 STATIC_ALIGNED_DOUBLE,// aligned long or double
1013 1013 NONSTATIC_OOP,
1014 1014 NONSTATIC_BYTE,
1015 1015 NONSTATIC_SHORT,
1016 1016 NONSTATIC_WORD,
1017 1017 NONSTATIC_DOUBLE,
1018 1018 NONSTATIC_ALIGNED_DOUBLE
1019 1019 };
1020 1020
1021 1021
1022 1022 struct FieldAllocationCount {
1023 1023 unsigned int static_oop_count;
1024 1024 unsigned int static_byte_count;
1025 1025 unsigned int static_short_count;
1026 1026 unsigned int static_word_count;
1027 1027 unsigned int static_double_count;
1028 1028 unsigned int nonstatic_oop_count;
1029 1029 unsigned int nonstatic_byte_count;
1030 1030 unsigned int nonstatic_short_count;
1031 1031 unsigned int nonstatic_word_count;
1032 1032 unsigned int nonstatic_double_count;
1033 1033 };
1034 1034
1035 1035 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface,
1036 1036 struct FieldAllocationCount *fac,
1037 1037 objArrayHandle* fields_annotations, TRAPS) {
1038 1038 ClassFileStream* cfs = stream();
1039 1039 typeArrayHandle nullHandle;
1040 1040 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1041 1041 u2 length = cfs->get_u2_fast();
1042 1042 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
1043 1043 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle));
1044 1044 typeArrayHandle fields(THREAD, new_fields);
1045 1045
1046 1046 int index = 0;
1047 1047 typeArrayHandle field_annotations;
1048 1048 for (int n = 0; n < length; n++) {
1049 1049 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1050 1050
1051 1051 AccessFlags access_flags;
1052 1052 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1053 1053 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1054 1054 access_flags.set_flags(flags);
1055 1055
1056 1056 u2 name_index = cfs->get_u2_fast();
1057 1057 int cp_size = cp->length();
1058 1058 check_property(
1059 1059 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1060 1060 "Invalid constant pool index %u for field name in class file %s",
1061 1061 name_index, CHECK_(nullHandle));
1062 1062 Symbol* name = cp->symbol_at(name_index);
1063 1063 verify_legal_field_name(name, CHECK_(nullHandle));
1064 1064
1065 1065 u2 signature_index = cfs->get_u2_fast();
1066 1066 check_property(
1067 1067 valid_cp_range(signature_index, cp_size) &&
1068 1068 cp->tag_at(signature_index).is_utf8(),
1069 1069 "Invalid constant pool index %u for field signature in class file %s",
1070 1070 signature_index, CHECK_(nullHandle));
1071 1071 Symbol* sig = cp->symbol_at(signature_index);
1072 1072 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1073 1073
1074 1074 u2 constantvalue_index = 0;
1075 1075 bool is_synthetic = false;
1076 1076 u2 generic_signature_index = 0;
1077 1077 bool is_static = access_flags.is_static();
1078 1078
1079 1079 u2 attributes_count = cfs->get_u2_fast();
1080 1080 if (attributes_count > 0) {
1081 1081 parse_field_attributes(cp, attributes_count, is_static, signature_index,
1082 1082 &constantvalue_index, &is_synthetic,
1083 1083 &generic_signature_index, &field_annotations,
1084 1084 CHECK_(nullHandle));
1085 1085 if (field_annotations.not_null()) {
1086 1086 if (fields_annotations->is_null()) {
1087 1087 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1088 1088 *fields_annotations = objArrayHandle(THREAD, md);
1089 1089 }
1090 1090 (*fields_annotations)->obj_at_put(n, field_annotations());
1091 1091 }
1092 1092 if (is_synthetic) {
1093 1093 access_flags.set_is_synthetic();
1094 1094 }
1095 1095 }
1096 1096
1097 1097 fields->short_at_put(index++, access_flags.as_short());
1098 1098 fields->short_at_put(index++, name_index);
1099 1099 fields->short_at_put(index++, signature_index);
1100 1100 fields->short_at_put(index++, constantvalue_index);
1101 1101
1102 1102 // Remember how many oops we encountered and compute allocation type
1103 1103 BasicType type = cp->basic_type_for_signature_at(signature_index);
1104 1104 FieldAllocationType atype;
1105 1105 if ( is_static ) {
1106 1106 switch ( type ) {
1107 1107 case T_BOOLEAN:
1108 1108 case T_BYTE:
1109 1109 fac->static_byte_count++;
1110 1110 atype = STATIC_BYTE;
1111 1111 break;
1112 1112 case T_LONG:
1113 1113 case T_DOUBLE:
1114 1114 if (Universe::field_type_should_be_aligned(type)) {
1115 1115 atype = STATIC_ALIGNED_DOUBLE;
1116 1116 } else {
1117 1117 atype = STATIC_DOUBLE;
1118 1118 }
1119 1119 fac->static_double_count++;
1120 1120 break;
1121 1121 case T_CHAR:
1122 1122 case T_SHORT:
1123 1123 fac->static_short_count++;
1124 1124 atype = STATIC_SHORT;
1125 1125 break;
1126 1126 case T_FLOAT:
1127 1127 case T_INT:
1128 1128 fac->static_word_count++;
1129 1129 atype = STATIC_WORD;
1130 1130 break;
1131 1131 case T_ARRAY:
1132 1132 case T_OBJECT:
1133 1133 fac->static_oop_count++;
1134 1134 atype = STATIC_OOP;
1135 1135 break;
1136 1136 case T_ADDRESS:
1137 1137 case T_VOID:
1138 1138 default:
1139 1139 assert(0, "bad field type");
1140 1140 }
1141 1141 } else {
1142 1142 switch ( type ) {
1143 1143 case T_BOOLEAN:
1144 1144 case T_BYTE:
1145 1145 fac->nonstatic_byte_count++;
1146 1146 atype = NONSTATIC_BYTE;
1147 1147 break;
1148 1148 case T_LONG:
1149 1149 case T_DOUBLE:
1150 1150 if (Universe::field_type_should_be_aligned(type)) {
1151 1151 atype = NONSTATIC_ALIGNED_DOUBLE;
1152 1152 } else {
1153 1153 atype = NONSTATIC_DOUBLE;
1154 1154 }
1155 1155 fac->nonstatic_double_count++;
1156 1156 break;
1157 1157 case T_CHAR:
1158 1158 case T_SHORT:
1159 1159 fac->nonstatic_short_count++;
1160 1160 atype = NONSTATIC_SHORT;
1161 1161 break;
1162 1162 case T_FLOAT:
1163 1163 case T_INT:
1164 1164 fac->nonstatic_word_count++;
1165 1165 atype = NONSTATIC_WORD;
1166 1166 break;
1167 1167 case T_ARRAY:
1168 1168 case T_OBJECT:
1169 1169 fac->nonstatic_oop_count++;
1170 1170 atype = NONSTATIC_OOP;
1171 1171 break;
1172 1172 case T_ADDRESS:
1173 1173 case T_VOID:
1174 1174 default:
1175 1175 assert(0, "bad field type");
1176 1176 }
1177 1177 }
1178 1178
1179 1179 // The correct offset is computed later (all oop fields will be located together)
1180 1180 // We temporarily store the allocation type in the offset field
1181 1181 fields->short_at_put(index++, atype);
1182 1182 fields->short_at_put(index++, 0); // Clear out high word of byte offset
1183 1183 fields->short_at_put(index++, generic_signature_index);
1184 1184 }
1185 1185
1186 1186 if (_need_verify && length > 1) {
1187 1187 // Check duplicated fields
1188 1188 ResourceMark rm(THREAD);
1189 1189 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1190 1190 THREAD, NameSigHash*, HASH_ROW_SIZE);
1191 1191 initialize_hashtable(names_and_sigs);
1192 1192 bool dup = false;
1193 1193 {
1194 1194 debug_only(No_Safepoint_Verifier nsv;)
1195 1195 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) {
1196 1196 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
1197 1197 Symbol* name = cp->symbol_at(name_index);
1198 1198 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
1199 1199 Symbol* sig = cp->symbol_at(sig_index);
1200 1200 // If no duplicates, add name/signature in hashtable names_and_sigs.
1201 1201 if (!put_after_lookup(name, sig, names_and_sigs)) {
1202 1202 dup = true;
1203 1203 break;
1204 1204 }
1205 1205 }
1206 1206 }
1207 1207 if (dup) {
1208 1208 classfile_parse_error("Duplicate field name&signature in class file %s",
1209 1209 CHECK_(nullHandle));
1210 1210 }
1211 1211 }
1212 1212
1213 1213 return fields;
1214 1214 }
1215 1215
1216 1216
1217 1217 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1218 1218 while (length-- > 0) {
1219 1219 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1220 1220 }
1221 1221 }
1222 1222
1223 1223
1224 1224 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
1225 1225 u4 exception_table_length,
1226 1226 constantPoolHandle cp,
1227 1227 TRAPS) {
1228 1228 ClassFileStream* cfs = stream();
1229 1229 typeArrayHandle nullHandle;
1230 1230
1231 1231 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
1232 1232 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
1233 1233 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
1234 1234
1235 1235 int index = 0;
1236 1236 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
1237 1237 for (unsigned int i = 0; i < exception_table_length; i++) {
1238 1238 u2 start_pc = cfs->get_u2_fast();
1239 1239 u2 end_pc = cfs->get_u2_fast();
1240 1240 u2 handler_pc = cfs->get_u2_fast();
1241 1241 u2 catch_type_index = cfs->get_u2_fast();
1242 1242 // Will check legal target after parsing code array in verifier.
1243 1243 if (_need_verify) {
1244 1244 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1245 1245 "Illegal exception table range in class file %s", CHECK_(nullHandle));
1246 1246 guarantee_property(handler_pc < code_length,
1247 1247 "Illegal exception table handler in class file %s", CHECK_(nullHandle));
1248 1248 if (catch_type_index != 0) {
1249 1249 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1250 1250 is_klass_reference(cp, catch_type_index),
1251 1251 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
1252 1252 }
1253 1253 }
1254 1254 exception_handlers->int_at_put(index++, start_pc);
1255 1255 exception_handlers->int_at_put(index++, end_pc);
1256 1256 exception_handlers->int_at_put(index++, handler_pc);
1257 1257 exception_handlers->int_at_put(index++, catch_type_index);
1258 1258 }
1259 1259 return exception_handlers;
1260 1260 }
1261 1261
1262 1262 void ClassFileParser::parse_linenumber_table(
1263 1263 u4 code_attribute_length, u4 code_length,
1264 1264 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1265 1265 ClassFileStream* cfs = stream();
1266 1266 unsigned int num_entries = cfs->get_u2(CHECK);
1267 1267
1268 1268 // Each entry is a u2 start_pc, and a u2 line_number
1269 1269 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1270 1270
1271 1271 // Verify line number attribute and table length
1272 1272 check_property(
1273 1273 code_attribute_length == sizeof(u2) + length_in_bytes,
1274 1274 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1275 1275
1276 1276 cfs->guarantee_more(length_in_bytes, CHECK);
1277 1277
1278 1278 if ((*write_stream) == NULL) {
1279 1279 if (length_in_bytes > fixed_buffer_size) {
1280 1280 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1281 1281 } else {
1282 1282 (*write_stream) = new CompressedLineNumberWriteStream(
1283 1283 linenumbertable_buffer, fixed_buffer_size);
1284 1284 }
1285 1285 }
1286 1286
1287 1287 while (num_entries-- > 0) {
1288 1288 u2 bci = cfs->get_u2_fast(); // start_pc
1289 1289 u2 line = cfs->get_u2_fast(); // line_number
1290 1290 guarantee_property(bci < code_length,
1291 1291 "Invalid pc in LineNumberTable in class file %s", CHECK);
1292 1292 (*write_stream)->write_pair(bci, line);
1293 1293 }
1294 1294 }
1295 1295
1296 1296
1297 1297 // Class file LocalVariableTable elements.
1298 1298 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1299 1299 public:
1300 1300 u2 start_bci;
1301 1301 u2 length;
1302 1302 u2 name_cp_index;
1303 1303 u2 descriptor_cp_index;
1304 1304 u2 slot;
1305 1305 };
1306 1306
1307 1307
1308 1308 class LVT_Hash: public CHeapObj {
1309 1309 public:
1310 1310 LocalVariableTableElement *_elem; // element
1311 1311 LVT_Hash* _next; // Next entry in hash table
1312 1312 };
1313 1313
1314 1314 unsigned int hash(LocalVariableTableElement *elem) {
1315 1315 unsigned int raw_hash = elem->start_bci;
1316 1316
1317 1317 raw_hash = elem->length + raw_hash * 37;
1318 1318 raw_hash = elem->name_cp_index + raw_hash * 37;
1319 1319 raw_hash = elem->slot + raw_hash * 37;
1320 1320
1321 1321 return raw_hash % HASH_ROW_SIZE;
1322 1322 }
1323 1323
1324 1324 void initialize_hashtable(LVT_Hash** table) {
1325 1325 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1326 1326 table[i] = NULL;
1327 1327 }
1328 1328 }
1329 1329
1330 1330 void clear_hashtable(LVT_Hash** table) {
1331 1331 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1332 1332 LVT_Hash* current = table[i];
1333 1333 LVT_Hash* next;
1334 1334 while (current != NULL) {
1335 1335 next = current->_next;
1336 1336 current->_next = NULL;
1337 1337 delete(current);
1338 1338 current = next;
1339 1339 }
1340 1340 table[i] = NULL;
1341 1341 }
1342 1342 }
1343 1343
1344 1344 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1345 1345 LVT_Hash* entry = table[index];
1346 1346
1347 1347 /*
1348 1348 * 3-tuple start_bci/length/slot has to be unique key,
1349 1349 * so the following comparison seems to be redundant:
1350 1350 * && elem->name_cp_index == entry->_elem->name_cp_index
1351 1351 */
1352 1352 while (entry != NULL) {
1353 1353 if (elem->start_bci == entry->_elem->start_bci
1354 1354 && elem->length == entry->_elem->length
1355 1355 && elem->name_cp_index == entry->_elem->name_cp_index
1356 1356 && elem->slot == entry->_elem->slot
1357 1357 ) {
1358 1358 return entry;
1359 1359 }
1360 1360 entry = entry->_next;
1361 1361 }
1362 1362 return NULL;
1363 1363 }
1364 1364
1365 1365 // Return false if the local variable is found in table.
1366 1366 // Return true if no duplicate is found.
1367 1367 // And local variable is added as a new entry in table.
1368 1368 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1369 1369 // First lookup for duplicates
1370 1370 int index = hash(elem);
1371 1371 LVT_Hash* entry = LVT_lookup(elem, index, table);
1372 1372
1373 1373 if (entry != NULL) {
1374 1374 return false;
1375 1375 }
1376 1376 // No duplicate is found, allocate a new entry and fill it.
1377 1377 if ((entry = new LVT_Hash()) == NULL) {
1378 1378 return false;
1379 1379 }
1380 1380 entry->_elem = elem;
1381 1381
1382 1382 // Insert into hash table
1383 1383 entry->_next = table[index];
1384 1384 table[index] = entry;
1385 1385
1386 1386 return true;
1387 1387 }
1388 1388
1389 1389 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1390 1390 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1391 1391 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1392 1392 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1393 1393 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1394 1394 lvt->signature_cp_index = 0;
1395 1395 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1396 1396 }
1397 1397
1398 1398 // Function is used to parse both attributes:
1399 1399 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1400 1400 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1401 1401 u2 max_locals,
1402 1402 u4 code_attribute_length,
1403 1403 constantPoolHandle cp,
1404 1404 u2* localvariable_table_length,
1405 1405 bool isLVTT,
1406 1406 TRAPS) {
1407 1407 ClassFileStream* cfs = stream();
1408 1408 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1409 1409 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1410 1410 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1411 1411 // Verify local variable table attribute has right length
1412 1412 if (_need_verify) {
1413 1413 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1414 1414 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1415 1415 }
1416 1416 u2* localvariable_table_start = cfs->get_u2_buffer();
1417 1417 assert(localvariable_table_start != NULL, "null local variable table");
1418 1418 if (!_need_verify) {
1419 1419 cfs->skip_u2_fast(size);
1420 1420 } else {
1421 1421 cfs->guarantee_more(size * 2, CHECK_NULL);
1422 1422 for(int i = 0; i < (*localvariable_table_length); i++) {
1423 1423 u2 start_pc = cfs->get_u2_fast();
1424 1424 u2 length = cfs->get_u2_fast();
1425 1425 u2 name_index = cfs->get_u2_fast();
1426 1426 u2 descriptor_index = cfs->get_u2_fast();
1427 1427 u2 index = cfs->get_u2_fast();
1428 1428 // Assign to a u4 to avoid overflow
1429 1429 u4 end_pc = (u4)start_pc + (u4)length;
1430 1430
1431 1431 if (start_pc >= code_length) {
1432 1432 classfile_parse_error(
1433 1433 "Invalid start_pc %u in %s in class file %s",
1434 1434 start_pc, tbl_name, CHECK_NULL);
1435 1435 }
1436 1436 if (end_pc > code_length) {
1437 1437 classfile_parse_error(
1438 1438 "Invalid length %u in %s in class file %s",
1439 1439 length, tbl_name, CHECK_NULL);
1440 1440 }
1441 1441 int cp_size = cp->length();
1442 1442 guarantee_property(
1443 1443 valid_cp_range(name_index, cp_size) &&
1444 1444 cp->tag_at(name_index).is_utf8(),
1445 1445 "Name index %u in %s has bad constant type in class file %s",
1446 1446 name_index, tbl_name, CHECK_NULL);
1447 1447 guarantee_property(
1448 1448 valid_cp_range(descriptor_index, cp_size) &&
1449 1449 cp->tag_at(descriptor_index).is_utf8(),
1450 1450 "Signature index %u in %s has bad constant type in class file %s",
1451 1451 descriptor_index, tbl_name, CHECK_NULL);
1452 1452
1453 1453 Symbol* name = cp->symbol_at(name_index);
1454 1454 Symbol* sig = cp->symbol_at(descriptor_index);
1455 1455 verify_legal_field_name(name, CHECK_NULL);
1456 1456 u2 extra_slot = 0;
1457 1457 if (!isLVTT) {
1458 1458 verify_legal_field_signature(name, sig, CHECK_NULL);
1459 1459
1460 1460 // 4894874: check special cases for double and long local variables
1461 1461 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1462 1462 sig == vmSymbols::type_signature(T_LONG)) {
1463 1463 extra_slot = 1;
1464 1464 }
1465 1465 }
1466 1466 guarantee_property((index + extra_slot) < max_locals,
1467 1467 "Invalid index %u in %s in class file %s",
1468 1468 index, tbl_name, CHECK_NULL);
1469 1469 }
1470 1470 }
1471 1471 return localvariable_table_start;
1472 1472 }
1473 1473
1474 1474
1475 1475 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1476 1476 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1477 1477 ClassFileStream* cfs = stream();
1478 1478 u2 index = 0; // index in the array with long/double occupying two slots
1479 1479 u4 i1 = *u1_index;
1480 1480 u4 i2 = *u2_index + 1;
1481 1481 for(int i = 0; i < array_length; i++) {
1482 1482 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1483 1483 index++;
1484 1484 if (tag == ITEM_Long || tag == ITEM_Double) {
1485 1485 index++;
1486 1486 } else if (tag == ITEM_Object) {
1487 1487 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1488 1488 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1489 1489 is_klass_reference(cp, class_index),
1490 1490 "Bad class index %u in StackMap in class file %s",
1491 1491 class_index, CHECK);
1492 1492 } else if (tag == ITEM_Uninitialized) {
1493 1493 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1494 1494 guarantee_property(
1495 1495 offset < code_length,
1496 1496 "Bad uninitialized type offset %u in StackMap in class file %s",
1497 1497 offset, CHECK);
1498 1498 } else {
1499 1499 guarantee_property(
1500 1500 tag <= (u1)ITEM_Uninitialized,
1501 1501 "Unknown variable type %u in StackMap in class file %s",
1502 1502 tag, CHECK);
1503 1503 }
1504 1504 }
1505 1505 u2_array[*u2_index] = index;
1506 1506 *u1_index = i1;
1507 1507 *u2_index = i2;
1508 1508 }
1509 1509
1510 1510 typeArrayOop ClassFileParser::parse_stackmap_table(
1511 1511 u4 code_attribute_length, TRAPS) {
1512 1512 if (code_attribute_length == 0)
1513 1513 return NULL;
1514 1514
1515 1515 ClassFileStream* cfs = stream();
1516 1516 u1* stackmap_table_start = cfs->get_u1_buffer();
1517 1517 assert(stackmap_table_start != NULL, "null stackmap table");
1518 1518
1519 1519 // check code_attribute_length first
1520 1520 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1521 1521
1522 1522 if (!_need_verify && !DumpSharedSpaces) {
1523 1523 return NULL;
1524 1524 }
1525 1525
1526 1526 typeArrayOop stackmap_data =
1527 1527 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1528 1528
1529 1529 stackmap_data->set_length(code_attribute_length);
1530 1530 memcpy((void*)stackmap_data->byte_at_addr(0),
1531 1531 (void*)stackmap_table_start, code_attribute_length);
1532 1532 return stackmap_data;
1533 1533 }
1534 1534
1535 1535 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1536 1536 u4 method_attribute_length,
1537 1537 constantPoolHandle cp, TRAPS) {
1538 1538 ClassFileStream* cfs = stream();
1539 1539 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1540 1540 *checked_exceptions_length = cfs->get_u2_fast();
1541 1541 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1542 1542 u2* checked_exceptions_start = cfs->get_u2_buffer();
1543 1543 assert(checked_exceptions_start != NULL, "null checked exceptions");
1544 1544 if (!_need_verify) {
1545 1545 cfs->skip_u2_fast(size);
1546 1546 } else {
1547 1547 // Verify each value in the checked exception table
1548 1548 u2 checked_exception;
1549 1549 u2 len = *checked_exceptions_length;
1550 1550 cfs->guarantee_more(2 * len, CHECK_NULL);
1551 1551 for (int i = 0; i < len; i++) {
1552 1552 checked_exception = cfs->get_u2_fast();
1553 1553 check_property(
1554 1554 valid_cp_range(checked_exception, cp->length()) &&
1555 1555 is_klass_reference(cp, checked_exception),
1556 1556 "Exception name has bad type at constant pool %u in class file %s",
1557 1557 checked_exception, CHECK_NULL);
1558 1558 }
1559 1559 }
1560 1560 // check exceptions attribute length
1561 1561 if (_need_verify) {
1562 1562 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1563 1563 sizeof(u2) * size),
1564 1564 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1565 1565 }
1566 1566 return checked_exceptions_start;
1567 1567 }
1568 1568
1569 1569 void ClassFileParser::throwIllegalSignature(
1570 1570 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1571 1571 ResourceMark rm(THREAD);
1572 1572 Exceptions::fthrow(THREAD_AND_LOCATION,
1573 1573 vmSymbols::java_lang_ClassFormatError(),
1574 1574 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1575 1575 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1576 1576 }
1577 1577
1578 1578 #define MAX_ARGS_SIZE 255
1579 1579 #define MAX_CODE_SIZE 65535
1580 1580 #define INITIAL_MAX_LVT_NUMBER 256
1581 1581
1582 1582 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1583 1583 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1584 1584 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1585 1585 // entire method attribute is parsed.
1586 1586 //
1587 1587 // The promoted_flags parameter is used to pass relevant access_flags
1588 1588 // from the method back up to the containing klass. These flag values
1589 1589 // are added to klass's access_flags.
1590 1590
1591 1591 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1592 1592 AccessFlags *promoted_flags,
1593 1593 typeArrayHandle* method_annotations,
1594 1594 typeArrayHandle* method_parameter_annotations,
1595 1595 typeArrayHandle* method_default_annotations,
1596 1596 TRAPS) {
1597 1597 ClassFileStream* cfs = stream();
1598 1598 methodHandle nullHandle;
1599 1599 ResourceMark rm(THREAD);
1600 1600 // Parse fixed parts
1601 1601 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1602 1602
1603 1603 int flags = cfs->get_u2_fast();
1604 1604 u2 name_index = cfs->get_u2_fast();
1605 1605 int cp_size = cp->length();
1606 1606 check_property(
1607 1607 valid_cp_range(name_index, cp_size) &&
1608 1608 cp->tag_at(name_index).is_utf8(),
1609 1609 "Illegal constant pool index %u for method name in class file %s",
1610 1610 name_index, CHECK_(nullHandle));
1611 1611 Symbol* name = cp->symbol_at(name_index);
1612 1612 verify_legal_method_name(name, CHECK_(nullHandle));
1613 1613
1614 1614 u2 signature_index = cfs->get_u2_fast();
1615 1615 guarantee_property(
1616 1616 valid_cp_range(signature_index, cp_size) &&
1617 1617 cp->tag_at(signature_index).is_utf8(),
1618 1618 "Illegal constant pool index %u for method signature in class file %s",
1619 1619 signature_index, CHECK_(nullHandle));
1620 1620 Symbol* signature = cp->symbol_at(signature_index);
1621 1621
1622 1622 AccessFlags access_flags;
1623 1623 if (name == vmSymbols::class_initializer_name()) {
1624 1624 // We ignore the other access flags for a valid class initializer.
1625 1625 // (JVM Spec 2nd ed., chapter 4.6)
1626 1626 if (_major_version < 51) { // backward compatibility
1627 1627 flags = JVM_ACC_STATIC;
1628 1628 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1629 1629 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1630 1630 }
1631 1631 } else {
1632 1632 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1633 1633 }
1634 1634
1635 1635 int args_size = -1; // only used when _need_verify is true
1636 1636 if (_need_verify) {
1637 1637 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1638 1638 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1639 1639 if (args_size > MAX_ARGS_SIZE) {
1640 1640 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1641 1641 }
1642 1642 }
1643 1643
1644 1644 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1645 1645
1646 1646 // Default values for code and exceptions attribute elements
1647 1647 u2 max_stack = 0;
1648 1648 u2 max_locals = 0;
1649 1649 u4 code_length = 0;
1650 1650 u1* code_start = 0;
1651 1651 u2 exception_table_length = 0;
1652 1652 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1653 1653 u2 checked_exceptions_length = 0;
1654 1654 u2* checked_exceptions_start = NULL;
1655 1655 CompressedLineNumberWriteStream* linenumber_table = NULL;
1656 1656 int linenumber_table_length = 0;
1657 1657 int total_lvt_length = 0;
1658 1658 u2 lvt_cnt = 0;
1659 1659 u2 lvtt_cnt = 0;
1660 1660 bool lvt_allocated = false;
1661 1661 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1662 1662 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1663 1663 u2* localvariable_table_length;
1664 1664 u2** localvariable_table_start;
1665 1665 u2* localvariable_type_table_length;
1666 1666 u2** localvariable_type_table_start;
1667 1667 bool parsed_code_attribute = false;
1668 1668 bool parsed_checked_exceptions_attribute = false;
1669 1669 bool parsed_stackmap_attribute = false;
1670 1670 // stackmap attribute - JDK1.5
1671 1671 typeArrayHandle stackmap_data;
1672 1672 u2 generic_signature_index = 0;
1673 1673 u1* runtime_visible_annotations = NULL;
1674 1674 int runtime_visible_annotations_length = 0;
1675 1675 u1* runtime_invisible_annotations = NULL;
1676 1676 int runtime_invisible_annotations_length = 0;
1677 1677 u1* runtime_visible_parameter_annotations = NULL;
1678 1678 int runtime_visible_parameter_annotations_length = 0;
1679 1679 u1* runtime_invisible_parameter_annotations = NULL;
1680 1680 int runtime_invisible_parameter_annotations_length = 0;
1681 1681 u1* annotation_default = NULL;
1682 1682 int annotation_default_length = 0;
1683 1683
1684 1684 // Parse code and exceptions attribute
1685 1685 u2 method_attributes_count = cfs->get_u2_fast();
1686 1686 while (method_attributes_count--) {
1687 1687 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1688 1688 u2 method_attribute_name_index = cfs->get_u2_fast();
1689 1689 u4 method_attribute_length = cfs->get_u4_fast();
1690 1690 check_property(
1691 1691 valid_cp_range(method_attribute_name_index, cp_size) &&
1692 1692 cp->tag_at(method_attribute_name_index).is_utf8(),
1693 1693 "Invalid method attribute name index %u in class file %s",
1694 1694 method_attribute_name_index, CHECK_(nullHandle));
1695 1695
1696 1696 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1697 1697 if (method_attribute_name == vmSymbols::tag_code()) {
1698 1698 // Parse Code attribute
1699 1699 if (_need_verify) {
1700 1700 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1701 1701 "Code attribute in native or abstract methods in class file %s",
1702 1702 CHECK_(nullHandle));
1703 1703 }
1704 1704 if (parsed_code_attribute) {
1705 1705 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1706 1706 }
1707 1707 parsed_code_attribute = true;
1708 1708
1709 1709 // Stack size, locals size, and code size
1710 1710 if (_major_version == 45 && _minor_version <= 2) {
1711 1711 cfs->guarantee_more(4, CHECK_(nullHandle));
1712 1712 max_stack = cfs->get_u1_fast();
1713 1713 max_locals = cfs->get_u1_fast();
1714 1714 code_length = cfs->get_u2_fast();
1715 1715 } else {
1716 1716 cfs->guarantee_more(8, CHECK_(nullHandle));
1717 1717 max_stack = cfs->get_u2_fast();
1718 1718 max_locals = cfs->get_u2_fast();
1719 1719 code_length = cfs->get_u4_fast();
1720 1720 }
1721 1721 if (_need_verify) {
1722 1722 guarantee_property(args_size <= max_locals,
1723 1723 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1724 1724 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1725 1725 "Invalid method Code length %u in class file %s",
1726 1726 code_length, CHECK_(nullHandle));
1727 1727 }
1728 1728 // Code pointer
1729 1729 code_start = cfs->get_u1_buffer();
1730 1730 assert(code_start != NULL, "null code start");
1731 1731 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1732 1732 cfs->skip_u1_fast(code_length);
1733 1733
1734 1734 // Exception handler table
1735 1735 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1736 1736 exception_table_length = cfs->get_u2_fast();
1737 1737 if (exception_table_length > 0) {
1738 1738 exception_handlers =
1739 1739 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1740 1740 }
1741 1741
1742 1742 // Parse additional attributes in code attribute
1743 1743 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1744 1744 u2 code_attributes_count = cfs->get_u2_fast();
1745 1745
1746 1746 unsigned int calculated_attribute_length = 0;
1747 1747
1748 1748 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1749 1749 calculated_attribute_length =
1750 1750 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1751 1751 } else {
1752 1752 // max_stack, locals and length are smaller in pre-version 45.2 classes
1753 1753 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1754 1754 }
1755 1755 calculated_attribute_length +=
1756 1756 code_length +
1757 1757 sizeof(exception_table_length) +
1758 1758 sizeof(code_attributes_count) +
1759 1759 exception_table_length *
1760 1760 ( sizeof(u2) + // start_pc
1761 1761 sizeof(u2) + // end_pc
1762 1762 sizeof(u2) + // handler_pc
1763 1763 sizeof(u2) ); // catch_type_index
1764 1764
1765 1765 while (code_attributes_count--) {
1766 1766 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1767 1767 u2 code_attribute_name_index = cfs->get_u2_fast();
1768 1768 u4 code_attribute_length = cfs->get_u4_fast();
1769 1769 calculated_attribute_length += code_attribute_length +
1770 1770 sizeof(code_attribute_name_index) +
1771 1771 sizeof(code_attribute_length);
1772 1772 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1773 1773 cp->tag_at(code_attribute_name_index).is_utf8(),
1774 1774 "Invalid code attribute name index %u in class file %s",
1775 1775 code_attribute_name_index,
1776 1776 CHECK_(nullHandle));
1777 1777 if (LoadLineNumberTables &&
1778 1778 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1779 1779 // Parse and compress line number table
1780 1780 parse_linenumber_table(code_attribute_length, code_length,
1781 1781 &linenumber_table, CHECK_(nullHandle));
1782 1782
1783 1783 } else if (LoadLocalVariableTables &&
1784 1784 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1785 1785 // Parse local variable table
1786 1786 if (!lvt_allocated) {
1787 1787 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1788 1788 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1789 1789 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1790 1790 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1791 1791 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1792 1792 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1793 1793 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1794 1794 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1795 1795 lvt_allocated = true;
1796 1796 }
1797 1797 if (lvt_cnt == max_lvt_cnt) {
1798 1798 max_lvt_cnt <<= 1;
1799 1799 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1800 1800 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1801 1801 }
1802 1802 localvariable_table_start[lvt_cnt] =
1803 1803 parse_localvariable_table(code_length,
1804 1804 max_locals,
1805 1805 code_attribute_length,
1806 1806 cp,
1807 1807 &localvariable_table_length[lvt_cnt],
1808 1808 false, // is not LVTT
1809 1809 CHECK_(nullHandle));
1810 1810 total_lvt_length += localvariable_table_length[lvt_cnt];
1811 1811 lvt_cnt++;
1812 1812 } else if (LoadLocalVariableTypeTables &&
1813 1813 _major_version >= JAVA_1_5_VERSION &&
1814 1814 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1815 1815 if (!lvt_allocated) {
1816 1816 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1817 1817 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1818 1818 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1819 1819 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1820 1820 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1821 1821 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1822 1822 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1823 1823 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1824 1824 lvt_allocated = true;
1825 1825 }
1826 1826 // Parse local variable type table
1827 1827 if (lvtt_cnt == max_lvtt_cnt) {
1828 1828 max_lvtt_cnt <<= 1;
1829 1829 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1830 1830 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1831 1831 }
1832 1832 localvariable_type_table_start[lvtt_cnt] =
1833 1833 parse_localvariable_table(code_length,
1834 1834 max_locals,
1835 1835 code_attribute_length,
1836 1836 cp,
1837 1837 &localvariable_type_table_length[lvtt_cnt],
1838 1838 true, // is LVTT
1839 1839 CHECK_(nullHandle));
1840 1840 lvtt_cnt++;
1841 1841 } else if (UseSplitVerifier &&
1842 1842 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1843 1843 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1844 1844 // Stack map is only needed by the new verifier in JDK1.5.
1845 1845 if (parsed_stackmap_attribute) {
1846 1846 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1847 1847 }
1848 1848 typeArrayOop sm =
1849 1849 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1850 1850 stackmap_data = typeArrayHandle(THREAD, sm);
1851 1851 parsed_stackmap_attribute = true;
1852 1852 } else {
1853 1853 // Skip unknown attributes
1854 1854 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1855 1855 }
1856 1856 }
1857 1857 // check method attribute length
1858 1858 if (_need_verify) {
1859 1859 guarantee_property(method_attribute_length == calculated_attribute_length,
1860 1860 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1861 1861 }
1862 1862 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1863 1863 // Parse Exceptions attribute
1864 1864 if (parsed_checked_exceptions_attribute) {
1865 1865 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1866 1866 }
1867 1867 parsed_checked_exceptions_attribute = true;
1868 1868 checked_exceptions_start =
1869 1869 parse_checked_exceptions(&checked_exceptions_length,
1870 1870 method_attribute_length,
1871 1871 cp, CHECK_(nullHandle));
1872 1872 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1873 1873 if (method_attribute_length != 0) {
1874 1874 classfile_parse_error(
1875 1875 "Invalid Synthetic method attribute length %u in class file %s",
1876 1876 method_attribute_length, CHECK_(nullHandle));
1877 1877 }
1878 1878 // Should we check that there hasn't already been a synthetic attribute?
1879 1879 access_flags.set_is_synthetic();
1880 1880 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1881 1881 if (method_attribute_length != 0) {
1882 1882 classfile_parse_error(
1883 1883 "Invalid Deprecated method attribute length %u in class file %s",
1884 1884 method_attribute_length, CHECK_(nullHandle));
1885 1885 }
1886 1886 } else if (_major_version >= JAVA_1_5_VERSION) {
1887 1887 if (method_attribute_name == vmSymbols::tag_signature()) {
1888 1888 if (method_attribute_length != 2) {
1889 1889 classfile_parse_error(
1890 1890 "Invalid Signature attribute length %u in class file %s",
1891 1891 method_attribute_length, CHECK_(nullHandle));
1892 1892 }
1893 1893 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
1894 1894 generic_signature_index = cfs->get_u2_fast();
1895 1895 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1896 1896 runtime_visible_annotations_length = method_attribute_length;
1897 1897 runtime_visible_annotations = cfs->get_u1_buffer();
1898 1898 assert(runtime_visible_annotations != NULL, "null visible annotations");
1899 1899 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1900 1900 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1901 1901 runtime_invisible_annotations_length = method_attribute_length;
1902 1902 runtime_invisible_annotations = cfs->get_u1_buffer();
1903 1903 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1904 1904 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1905 1905 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1906 1906 runtime_visible_parameter_annotations_length = method_attribute_length;
1907 1907 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1908 1908 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1909 1909 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1910 1910 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1911 1911 runtime_invisible_parameter_annotations_length = method_attribute_length;
1912 1912 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1913 1913 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1914 1914 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1915 1915 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1916 1916 annotation_default_length = method_attribute_length;
1917 1917 annotation_default = cfs->get_u1_buffer();
1918 1918 assert(annotation_default != NULL, "null annotation default");
1919 1919 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1920 1920 } else {
1921 1921 // Skip unknown attributes
1922 1922 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1923 1923 }
1924 1924 } else {
1925 1925 // Skip unknown attributes
1926 1926 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1927 1927 }
1928 1928 }
1929 1929
1930 1930 if (linenumber_table != NULL) {
1931 1931 linenumber_table->write_terminator();
1932 1932 linenumber_table_length = linenumber_table->position();
1933 1933 }
1934 1934
1935 1935 // Make sure there's at least one Code attribute in non-native/non-abstract method
1936 1936 if (_need_verify) {
1937 1937 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
1938 1938 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
1939 1939 }
1940 1940
1941 1941 // All sizing information for a methodOop is finally available, now create it
1942 1942 methodOop m_oop = oopFactory::new_method(code_length, access_flags, linenumber_table_length,
1943 1943 total_lvt_length, checked_exceptions_length,
1944 1944 oopDesc::IsSafeConc, CHECK_(nullHandle));
1945 1945 methodHandle m (THREAD, m_oop);
1946 1946
1947 1947 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
1948 1948
1949 1949 // Fill in information from fixed part (access_flags already set)
1950 1950 m->set_constants(cp());
1951 1951 m->set_name_index(name_index);
1952 1952 m->set_signature_index(signature_index);
1953 1953 m->set_generic_signature_index(generic_signature_index);
1954 1954 #ifdef CC_INTERP
1955 1955 // hmm is there a gc issue here??
1956 1956 ResultTypeFinder rtf(cp->symbol_at(signature_index));
1957 1957 m->set_result_index(rtf.type());
1958 1958 #endif
1959 1959
1960 1960 if (args_size >= 0) {
1961 1961 m->set_size_of_parameters(args_size);
1962 1962 } else {
1963 1963 m->compute_size_of_parameters(THREAD);
1964 1964 }
1965 1965 #ifdef ASSERT
1966 1966 if (args_size >= 0) {
1967 1967 m->compute_size_of_parameters(THREAD);
1968 1968 assert(args_size == m->size_of_parameters(), "");
1969 1969 }
1970 1970 #endif
1971 1971
1972 1972 // Fill in code attribute information
1973 1973 m->set_max_stack(max_stack);
1974 1974 m->set_max_locals(max_locals);
1975 1975 m->constMethod()->set_stackmap_data(stackmap_data());
1976 1976
1977 1977 /**
1978 1978 * The exception_table field is the flag used to indicate
1979 1979 * that the methodOop and it's associated constMethodOop are partially
1980 1980 * initialized and thus are exempt from pre/post GC verification. Once
1981 1981 * the field is set, the oops are considered fully initialized so make
1982 1982 * sure that the oops can pass verification when this field is set.
1983 1983 */
1984 1984 m->set_exception_table(exception_handlers());
1985 1985
1986 1986 // Copy byte codes
1987 1987 m->set_code(code_start);
1988 1988
1989 1989 // Copy line number table
1990 1990 if (linenumber_table != NULL) {
1991 1991 memcpy(m->compressed_linenumber_table(),
1992 1992 linenumber_table->buffer(), linenumber_table_length);
1993 1993 }
1994 1994
1995 1995 // Copy checked exceptions
1996 1996 if (checked_exceptions_length > 0) {
1997 1997 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
1998 1998 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
1999 1999 }
2000 2000
2001 2001 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2002 2002 *
2003 2003 * Rules for LVT's and LVTT's are:
2004 2004 * - There can be any number of LVT's and LVTT's.
2005 2005 * - If there are n LVT's, it is the same as if there was just
2006 2006 * one LVT containing all the entries from the n LVT's.
2007 2007 * - There may be no more than one LVT entry per local variable.
2008 2008 * Two LVT entries are 'equal' if these fields are the same:
2009 2009 * start_pc, length, name, slot
2010 2010 * - There may be no more than one LVTT entry per each LVT entry.
2011 2011 * Each LVTT entry has to match some LVT entry.
2012 2012 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2013 2013 */
2014 2014 if (total_lvt_length > 0) {
2015 2015 int tbl_no, idx;
2016 2016
2017 2017 promoted_flags->set_has_localvariable_table();
2018 2018
2019 2019 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2020 2020 initialize_hashtable(lvt_Hash);
2021 2021
2022 2022 // To fill LocalVariableTable in
2023 2023 Classfile_LVT_Element* cf_lvt;
2024 2024 LocalVariableTableElement* lvt = m->localvariable_table_start();
2025 2025
2026 2026 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2027 2027 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2028 2028 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2029 2029 copy_lvt_element(&cf_lvt[idx], lvt);
2030 2030 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2031 2031 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2032 2032 && _need_verify
2033 2033 && _major_version >= JAVA_1_5_VERSION ) {
2034 2034 clear_hashtable(lvt_Hash);
2035 2035 classfile_parse_error("Duplicated LocalVariableTable attribute "
2036 2036 "entry for '%s' in class file %s",
2037 2037 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2038 2038 CHECK_(nullHandle));
2039 2039 }
2040 2040 }
2041 2041 }
2042 2042
2043 2043 // To merge LocalVariableTable and LocalVariableTypeTable
2044 2044 Classfile_LVT_Element* cf_lvtt;
2045 2045 LocalVariableTableElement lvtt_elem;
2046 2046
2047 2047 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2048 2048 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2049 2049 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2050 2050 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2051 2051 int index = hash(&lvtt_elem);
2052 2052 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2053 2053 if (entry == NULL) {
2054 2054 if (_need_verify) {
2055 2055 clear_hashtable(lvt_Hash);
2056 2056 classfile_parse_error("LVTT entry for '%s' in class file %s "
2057 2057 "does not match any LVT entry",
2058 2058 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2059 2059 CHECK_(nullHandle));
2060 2060 }
2061 2061 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2062 2062 clear_hashtable(lvt_Hash);
2063 2063 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2064 2064 "entry for '%s' in class file %s",
2065 2065 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2066 2066 CHECK_(nullHandle));
2067 2067 } else {
2068 2068 // to add generic signatures into LocalVariableTable
2069 2069 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2070 2070 }
2071 2071 }
2072 2072 }
2073 2073 clear_hashtable(lvt_Hash);
2074 2074 }
2075 2075
2076 2076 *method_annotations = assemble_annotations(runtime_visible_annotations,
2077 2077 runtime_visible_annotations_length,
2078 2078 runtime_invisible_annotations,
2079 2079 runtime_invisible_annotations_length,
2080 2080 CHECK_(nullHandle));
2081 2081 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
2082 2082 runtime_visible_parameter_annotations_length,
2083 2083 runtime_invisible_parameter_annotations,
2084 2084 runtime_invisible_parameter_annotations_length,
2085 2085 CHECK_(nullHandle));
2086 2086 *method_default_annotations = assemble_annotations(annotation_default,
2087 2087 annotation_default_length,
2088 2088 NULL,
2089 2089 0,
2090 2090 CHECK_(nullHandle));
2091 2091
2092 2092 if (name == vmSymbols::finalize_method_name() &&
2093 2093 signature == vmSymbols::void_method_signature()) {
2094 2094 if (m->is_empty_method()) {
2095 2095 _has_empty_finalizer = true;
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2096 2096 } else {
2097 2097 _has_finalizer = true;
2098 2098 }
2099 2099 }
2100 2100 if (name == vmSymbols::object_initializer_name() &&
2101 2101 signature == vmSymbols::void_method_signature() &&
2102 2102 m->is_vanilla_constructor()) {
2103 2103 _has_vanilla_constructor = true;
2104 2104 }
2105 2105
2106 - if (EnableMethodHandles && (m->is_method_handle_invoke() ||
2106 + if (EnableInvokeDynamic && (m->is_method_handle_invoke() ||
2107 2107 m->is_method_handle_adapter())) {
2108 2108 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
2109 2109 "Method handle invokers must be defined internally to the VM", nullHandle);
2110 2110 }
2111 2111
2112 2112 return m;
2113 2113 }
2114 2114
2115 2115
2116 2116 // The promoted_flags parameter is used to pass relevant access_flags
2117 2117 // from the methods back up to the containing klass. These flag values
2118 2118 // are added to klass's access_flags.
2119 2119
2120 2120 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
2121 2121 AccessFlags* promoted_flags,
2122 2122 bool* has_final_method,
2123 2123 objArrayOop* methods_annotations_oop,
2124 2124 objArrayOop* methods_parameter_annotations_oop,
2125 2125 objArrayOop* methods_default_annotations_oop,
2126 2126 TRAPS) {
2127 2127 ClassFileStream* cfs = stream();
2128 2128 objArrayHandle nullHandle;
2129 2129 typeArrayHandle method_annotations;
2130 2130 typeArrayHandle method_parameter_annotations;
2131 2131 typeArrayHandle method_default_annotations;
2132 2132 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
2133 2133 u2 length = cfs->get_u2_fast();
2134 2134 if (length == 0) {
2135 2135 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2136 2136 } else {
2137 2137 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2138 2138 objArrayHandle methods(THREAD, m);
2139 2139 HandleMark hm(THREAD);
2140 2140 objArrayHandle methods_annotations;
2141 2141 objArrayHandle methods_parameter_annotations;
2142 2142 objArrayHandle methods_default_annotations;
2143 2143 for (int index = 0; index < length; index++) {
2144 2144 methodHandle method = parse_method(cp, is_interface,
2145 2145 promoted_flags,
2146 2146 &method_annotations,
2147 2147 &method_parameter_annotations,
2148 2148 &method_default_annotations,
2149 2149 CHECK_(nullHandle));
2150 2150 if (method->is_final()) {
2151 2151 *has_final_method = true;
2152 2152 }
2153 2153 methods->obj_at_put(index, method());
2154 2154 if (method_annotations.not_null()) {
2155 2155 if (methods_annotations.is_null()) {
2156 2156 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2157 2157 methods_annotations = objArrayHandle(THREAD, md);
2158 2158 }
2159 2159 methods_annotations->obj_at_put(index, method_annotations());
2160 2160 }
2161 2161 if (method_parameter_annotations.not_null()) {
2162 2162 if (methods_parameter_annotations.is_null()) {
2163 2163 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2164 2164 methods_parameter_annotations = objArrayHandle(THREAD, md);
2165 2165 }
2166 2166 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
2167 2167 }
2168 2168 if (method_default_annotations.not_null()) {
2169 2169 if (methods_default_annotations.is_null()) {
2170 2170 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2171 2171 methods_default_annotations = objArrayHandle(THREAD, md);
2172 2172 }
2173 2173 methods_default_annotations->obj_at_put(index, method_default_annotations());
2174 2174 }
2175 2175 }
2176 2176 if (_need_verify && length > 1) {
2177 2177 // Check duplicated methods
2178 2178 ResourceMark rm(THREAD);
2179 2179 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2180 2180 THREAD, NameSigHash*, HASH_ROW_SIZE);
2181 2181 initialize_hashtable(names_and_sigs);
2182 2182 bool dup = false;
2183 2183 {
2184 2184 debug_only(No_Safepoint_Verifier nsv;)
2185 2185 for (int i = 0; i < length; i++) {
2186 2186 methodOop m = (methodOop)methods->obj_at(i);
2187 2187 // If no duplicates, add name/signature in hashtable names_and_sigs.
2188 2188 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2189 2189 dup = true;
2190 2190 break;
2191 2191 }
2192 2192 }
2193 2193 }
2194 2194 if (dup) {
2195 2195 classfile_parse_error("Duplicate method name&signature in class file %s",
2196 2196 CHECK_(nullHandle));
2197 2197 }
2198 2198 }
2199 2199
2200 2200 *methods_annotations_oop = methods_annotations();
2201 2201 *methods_parameter_annotations_oop = methods_parameter_annotations();
2202 2202 *methods_default_annotations_oop = methods_default_annotations();
2203 2203
2204 2204 return methods;
2205 2205 }
2206 2206 }
2207 2207
2208 2208
2209 2209 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
2210 2210 objArrayHandle methods_annotations,
2211 2211 objArrayHandle methods_parameter_annotations,
2212 2212 objArrayHandle methods_default_annotations,
2213 2213 TRAPS) {
2214 2214 typeArrayHandle nullHandle;
2215 2215 int length = methods()->length();
2216 2216 // If JVMTI original method ordering is enabled we have to
2217 2217 // remember the original class file ordering.
2218 2218 // We temporarily use the vtable_index field in the methodOop to store the
2219 2219 // class file index, so we can read in after calling qsort.
2220 2220 if (JvmtiExport::can_maintain_original_method_order()) {
2221 2221 for (int index = 0; index < length; index++) {
2222 2222 methodOop m = methodOop(methods->obj_at(index));
2223 2223 assert(!m->valid_vtable_index(), "vtable index should not be set");
2224 2224 m->set_vtable_index(index);
2225 2225 }
2226 2226 }
2227 2227 // Sort method array by ascending method name (for faster lookups & vtable construction)
2228 2228 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2229 2229 methodOopDesc::sort_methods(methods(),
2230 2230 methods_annotations(),
2231 2231 methods_parameter_annotations(),
2232 2232 methods_default_annotations());
2233 2233
2234 2234 // If JVMTI original method ordering is enabled construct int array remembering the original ordering
2235 2235 if (JvmtiExport::can_maintain_original_method_order()) {
2236 2236 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
2237 2237 typeArrayHandle method_ordering(THREAD, new_ordering);
2238 2238 for (int index = 0; index < length; index++) {
2239 2239 methodOop m = methodOop(methods->obj_at(index));
2240 2240 int old_index = m->vtable_index();
2241 2241 assert(old_index >= 0 && old_index < length, "invalid method index");
2242 2242 method_ordering->int_at_put(index, old_index);
2243 2243 m->set_vtable_index(methodOopDesc::invalid_vtable_index);
2244 2244 }
2245 2245 return method_ordering;
2246 2246 } else {
2247 2247 return typeArrayHandle(THREAD, Universe::the_empty_int_array());
2248 2248 }
2249 2249 }
2250 2250
2251 2251
2252 2252 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2253 2253 ClassFileStream* cfs = stream();
2254 2254 cfs->guarantee_more(2, CHECK); // sourcefile_index
2255 2255 u2 sourcefile_index = cfs->get_u2_fast();
2256 2256 check_property(
2257 2257 valid_cp_range(sourcefile_index, cp->length()) &&
2258 2258 cp->tag_at(sourcefile_index).is_utf8(),
2259 2259 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2260 2260 sourcefile_index, CHECK);
2261 2261 k->set_source_file_name(cp->symbol_at(sourcefile_index));
2262 2262 }
2263 2263
2264 2264
2265 2265
2266 2266 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2267 2267 instanceKlassHandle k,
2268 2268 int length, TRAPS) {
2269 2269 ClassFileStream* cfs = stream();
2270 2270 u1* sde_buffer = cfs->get_u1_buffer();
2271 2271 assert(sde_buffer != NULL, "null sde buffer");
2272 2272
2273 2273 // Don't bother storing it if there is no way to retrieve it
2274 2274 if (JvmtiExport::can_get_source_debug_extension()) {
2275 2275 // Optimistically assume that only 1 byte UTF format is used
2276 2276 // (common case)
2277 2277 TempNewSymbol sde_symbol = SymbolTable::new_symbol((const char*)sde_buffer, length, CHECK);
2278 2278 k->set_source_debug_extension(sde_symbol);
2279 2279 // Note that set_source_debug_extension() increments the reference count
2280 2280 // for its copy of the Symbol*, so use a TempNewSymbol here.
2281 2281 }
2282 2282 // Got utf8 string, set stream position forward
2283 2283 cfs->skip_u1(length, CHECK);
2284 2284 }
2285 2285
2286 2286
2287 2287 // Inner classes can be static, private or protected (classic VM does this)
2288 2288 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2289 2289
2290 2290 // Return number of classes in the inner classes attribute table
2291 2291 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2292 2292 ClassFileStream* cfs = stream();
2293 2293 cfs->guarantee_more(2, CHECK_0); // length
2294 2294 u2 length = cfs->get_u2_fast();
2295 2295
2296 2296 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
2297 2297 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);
2298 2298 typeArrayHandle inner_classes(THREAD, ic);
2299 2299 int index = 0;
2300 2300 int cp_size = cp->length();
2301 2301 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2302 2302 for (int n = 0; n < length; n++) {
2303 2303 // Inner class index
2304 2304 u2 inner_class_info_index = cfs->get_u2_fast();
2305 2305 check_property(
2306 2306 inner_class_info_index == 0 ||
2307 2307 (valid_cp_range(inner_class_info_index, cp_size) &&
2308 2308 is_klass_reference(cp, inner_class_info_index)),
2309 2309 "inner_class_info_index %u has bad constant type in class file %s",
2310 2310 inner_class_info_index, CHECK_0);
2311 2311 // Outer class index
2312 2312 u2 outer_class_info_index = cfs->get_u2_fast();
2313 2313 check_property(
2314 2314 outer_class_info_index == 0 ||
2315 2315 (valid_cp_range(outer_class_info_index, cp_size) &&
2316 2316 is_klass_reference(cp, outer_class_info_index)),
2317 2317 "outer_class_info_index %u has bad constant type in class file %s",
2318 2318 outer_class_info_index, CHECK_0);
2319 2319 // Inner class name
2320 2320 u2 inner_name_index = cfs->get_u2_fast();
2321 2321 check_property(
2322 2322 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2323 2323 cp->tag_at(inner_name_index).is_utf8()),
2324 2324 "inner_name_index %u has bad constant type in class file %s",
2325 2325 inner_name_index, CHECK_0);
2326 2326 if (_need_verify) {
2327 2327 guarantee_property(inner_class_info_index != outer_class_info_index,
2328 2328 "Class is both outer and inner class in class file %s", CHECK_0);
2329 2329 }
2330 2330 // Access flags
2331 2331 AccessFlags inner_access_flags;
2332 2332 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2333 2333 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2334 2334 // Set abstract bit for old class files for backward compatibility
2335 2335 flags |= JVM_ACC_ABSTRACT;
2336 2336 }
2337 2337 verify_legal_class_modifiers(flags, CHECK_0);
2338 2338 inner_access_flags.set_flags(flags);
2339 2339
2340 2340 inner_classes->short_at_put(index++, inner_class_info_index);
2341 2341 inner_classes->short_at_put(index++, outer_class_info_index);
2342 2342 inner_classes->short_at_put(index++, inner_name_index);
2343 2343 inner_classes->short_at_put(index++, inner_access_flags.as_short());
2344 2344 }
2345 2345
2346 2346 // 4347400: make sure there's no duplicate entry in the classes array
2347 2347 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2348 2348 for(int i = 0; i < inner_classes->length(); i += 4) {
2349 2349 for(int j = i + 4; j < inner_classes->length(); j += 4) {
2350 2350 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
2351 2351 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2352 2352 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2353 2353 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2354 2354 "Duplicate entry in InnerClasses in class file %s",
2355 2355 CHECK_0);
2356 2356 }
2357 2357 }
2358 2358 }
2359 2359
2360 2360 // Update instanceKlass with inner class info.
2361 2361 k->set_inner_classes(inner_classes());
2362 2362 return length;
2363 2363 }
2364 2364
2365 2365 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2366 2366 k->set_is_synthetic();
2367 2367 }
2368 2368
2369 2369 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2370 2370 ClassFileStream* cfs = stream();
2371 2371 u2 signature_index = cfs->get_u2(CHECK);
2372 2372 check_property(
2373 2373 valid_cp_range(signature_index, cp->length()) &&
2374 2374 cp->tag_at(signature_index).is_utf8(),
2375 2375 "Invalid constant pool index %u in Signature attribute in class file %s",
2376 2376 signature_index, CHECK);
2377 2377 k->set_generic_signature(cp->symbol_at(signature_index));
2378 2378 }
2379 2379
2380 2380 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k,
2381 2381 u4 attribute_byte_length, TRAPS) {
2382 2382 ClassFileStream* cfs = stream();
2383 2383 u1* current_start = cfs->current();
2384 2384
2385 2385 cfs->guarantee_more(2, CHECK); // length
2386 2386 int attribute_array_length = cfs->get_u2_fast();
2387 2387
2388 2388 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2389 2389 "Short length on BootstrapMethods in class file %s",
2390 2390 CHECK);
2391 2391
2392 2392 // The attribute contains a counted array of counted tuples of shorts,
2393 2393 // represending bootstrap specifiers:
2394 2394 // length*{bootstrap_method_index, argument_count*{argument_index}}
2395 2395 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2396 2396 // operand_count = number of shorts in attr, except for leading length
2397 2397
2398 2398 // The attribute is copied into a short[] array.
2399 2399 // The array begins with a series of short[2] pairs, one for each tuple.
2400 2400 int index_size = (attribute_array_length * 2);
2401 2401
2402 2402 typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK);
2403 2403 typeArrayHandle operands(THREAD, operands_oop);
2404 2404 operands_oop = NULL; // tidy
2405 2405
2406 2406 int operand_fill_index = index_size;
2407 2407 int cp_size = cp->length();
2408 2408
2409 2409 for (int n = 0; n < attribute_array_length; n++) {
2410 2410 // Store a 32-bit offset into the header of the operand array.
2411 2411 assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, "");
2412 2412 constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index);
2413 2413
2414 2414 // Read a bootstrap specifier.
2415 2415 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2416 2416 u2 bootstrap_method_index = cfs->get_u2_fast();
2417 2417 u2 argument_count = cfs->get_u2_fast();
2418 2418 check_property(
2419 2419 valid_cp_range(bootstrap_method_index, cp_size) &&
2420 2420 cp->tag_at(bootstrap_method_index).is_method_handle(),
2421 2421 "bootstrap_method_index %u has bad constant type in class file %s",
2422 2422 bootstrap_method_index,
2423 2423 CHECK);
2424 2424 operands->short_at_put(operand_fill_index++, bootstrap_method_index);
2425 2425 operands->short_at_put(operand_fill_index++, argument_count);
2426 2426
2427 2427 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2428 2428 for (int j = 0; j < argument_count; j++) {
2429 2429 u2 argument_index = cfs->get_u2_fast();
2430 2430 check_property(
2431 2431 valid_cp_range(argument_index, cp_size) &&
2432 2432 cp->tag_at(argument_index).is_loadable_constant(),
2433 2433 "argument_index %u has bad constant type in class file %s",
2434 2434 argument_index,
2435 2435 CHECK);
2436 2436 operands->short_at_put(operand_fill_index++, argument_index);
2437 2437 }
2438 2438 }
2439 2439
2440 2440 assert(operand_fill_index == operands()->length(), "exact fill");
2441 2441 assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode");
2442 2442
2443 2443 u1* current_end = cfs->current();
2444 2444 guarantee_property(current_end == current_start + attribute_byte_length,
2445 2445 "Bad length on BootstrapMethods in class file %s",
2446 2446 CHECK);
2447 2447
2448 2448 cp->set_operands(operands());
2449 2449 }
2450 2450
2451 2451
2452 2452 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2453 2453 ClassFileStream* cfs = stream();
2454 2454 // Set inner classes attribute to default sentinel
2455 2455 k->set_inner_classes(Universe::the_empty_short_array());
2456 2456 cfs->guarantee_more(2, CHECK); // attributes_count
2457 2457 u2 attributes_count = cfs->get_u2_fast();
2458 2458 bool parsed_sourcefile_attribute = false;
2459 2459 bool parsed_innerclasses_attribute = false;
2460 2460 bool parsed_enclosingmethod_attribute = false;
2461 2461 bool parsed_bootstrap_methods_attribute = false;
2462 2462 u1* runtime_visible_annotations = NULL;
2463 2463 int runtime_visible_annotations_length = 0;
2464 2464 u1* runtime_invisible_annotations = NULL;
2465 2465 int runtime_invisible_annotations_length = 0;
2466 2466 // Iterate over attributes
2467 2467 while (attributes_count--) {
2468 2468 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2469 2469 u2 attribute_name_index = cfs->get_u2_fast();
2470 2470 u4 attribute_length = cfs->get_u4_fast();
2471 2471 check_property(
2472 2472 valid_cp_range(attribute_name_index, cp->length()) &&
2473 2473 cp->tag_at(attribute_name_index).is_utf8(),
2474 2474 "Attribute name has bad constant pool index %u in class file %s",
2475 2475 attribute_name_index, CHECK);
2476 2476 Symbol* tag = cp->symbol_at(attribute_name_index);
2477 2477 if (tag == vmSymbols::tag_source_file()) {
2478 2478 // Check for SourceFile tag
2479 2479 if (_need_verify) {
2480 2480 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2481 2481 }
2482 2482 if (parsed_sourcefile_attribute) {
2483 2483 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2484 2484 } else {
2485 2485 parsed_sourcefile_attribute = true;
2486 2486 }
2487 2487 parse_classfile_sourcefile_attribute(cp, k, CHECK);
2488 2488 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2489 2489 // Check for SourceDebugExtension tag
2490 2490 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
2491 2491 } else if (tag == vmSymbols::tag_inner_classes()) {
2492 2492 // Check for InnerClasses tag
2493 2493 if (parsed_innerclasses_attribute) {
2494 2494 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2495 2495 } else {
2496 2496 parsed_innerclasses_attribute = true;
2497 2497 }
2498 2498 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
2499 2499 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2500 2500 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2501 2501 "Wrong InnerClasses attribute length in class file %s", CHECK);
2502 2502 }
2503 2503 } else if (tag == vmSymbols::tag_synthetic()) {
2504 2504 // Check for Synthetic tag
2505 2505 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2506 2506 if (attribute_length != 0) {
2507 2507 classfile_parse_error(
2508 2508 "Invalid Synthetic classfile attribute length %u in class file %s",
2509 2509 attribute_length, CHECK);
2510 2510 }
2511 2511 parse_classfile_synthetic_attribute(cp, k, CHECK);
2512 2512 } else if (tag == vmSymbols::tag_deprecated()) {
2513 2513 // Check for Deprecatd tag - 4276120
2514 2514 if (attribute_length != 0) {
2515 2515 classfile_parse_error(
2516 2516 "Invalid Deprecated classfile attribute length %u in class file %s",
2517 2517 attribute_length, CHECK);
2518 2518 }
2519 2519 } else if (_major_version >= JAVA_1_5_VERSION) {
2520 2520 if (tag == vmSymbols::tag_signature()) {
2521 2521 if (attribute_length != 2) {
2522 2522 classfile_parse_error(
2523 2523 "Wrong Signature attribute length %u in class file %s",
2524 2524 attribute_length, CHECK);
2525 2525 }
2526 2526 parse_classfile_signature_attribute(cp, k, CHECK);
2527 2527 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2528 2528 runtime_visible_annotations_length = attribute_length;
2529 2529 runtime_visible_annotations = cfs->get_u1_buffer();
2530 2530 assert(runtime_visible_annotations != NULL, "null visible annotations");
2531 2531 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2532 2532 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2533 2533 runtime_invisible_annotations_length = attribute_length;
2534 2534 runtime_invisible_annotations = cfs->get_u1_buffer();
2535 2535 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2536 2536 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2537 2537 } else if (tag == vmSymbols::tag_enclosing_method()) {
2538 2538 if (parsed_enclosingmethod_attribute) {
2539 2539 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2540 2540 } else {
2541 2541 parsed_enclosingmethod_attribute = true;
2542 2542 }
2543 2543 cfs->guarantee_more(4, CHECK); // class_index, method_index
2544 2544 u2 class_index = cfs->get_u2_fast();
2545 2545 u2 method_index = cfs->get_u2_fast();
2546 2546 if (class_index == 0) {
2547 2547 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2548 2548 }
2549 2549 // Validate the constant pool indices and types
2550 2550 if (!cp->is_within_bounds(class_index) ||
2551 2551 !is_klass_reference(cp, class_index)) {
2552 2552 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2553 2553 }
2554 2554 if (method_index != 0 &&
2555 2555 (!cp->is_within_bounds(method_index) ||
2556 2556 !cp->tag_at(method_index).is_name_and_type())) {
2557 2557 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2558 2558 }
2559 2559 k->set_enclosing_method_indices(class_index, method_index);
2560 2560 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2561 2561 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2562 2562 if (parsed_bootstrap_methods_attribute)
2563 2563 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2564 2564 parsed_bootstrap_methods_attribute = true;
2565 2565 parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK);
2566 2566 } else {
2567 2567 // Unknown attribute
2568 2568 cfs->skip_u1(attribute_length, CHECK);
2569 2569 }
2570 2570 } else {
2571 2571 // Unknown attribute
2572 2572 cfs->skip_u1(attribute_length, CHECK);
2573 2573 }
2574 2574 }
2575 2575 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2576 2576 runtime_visible_annotations_length,
2577 2577 runtime_invisible_annotations,
2578 2578 runtime_invisible_annotations_length,
2579 2579 CHECK);
2580 2580 k->set_class_annotations(annotations());
2581 2581
2582 2582 if (_max_bootstrap_specifier_index >= 0) {
2583 2583 guarantee_property(parsed_bootstrap_methods_attribute,
2584 2584 "Missing BootstrapMethods attribute in class file %s", CHECK);
2585 2585 }
2586 2586 }
2587 2587
2588 2588
2589 2589 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2590 2590 int runtime_visible_annotations_length,
2591 2591 u1* runtime_invisible_annotations,
2592 2592 int runtime_invisible_annotations_length, TRAPS) {
2593 2593 typeArrayHandle annotations;
2594 2594 if (runtime_visible_annotations != NULL ||
2595 2595 runtime_invisible_annotations != NULL) {
2596 2596 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2597 2597 runtime_invisible_annotations_length, CHECK_(annotations));
2598 2598 annotations = typeArrayHandle(THREAD, anno);
2599 2599 if (runtime_visible_annotations != NULL) {
2600 2600 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2601 2601 }
2602 2602 if (runtime_invisible_annotations != NULL) {
2603 2603 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2604 2604 }
2605 2605 }
2606 2606 return annotations;
2607 2607 }
2608 2608
2609 2609
2610 2610 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
2611 2611 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) {
2612 2612 // This code is for compatibility with earlier jdk's that do not
2613 2613 // have the "discovered" field in java.lang.ref.Reference. For 1.5
2614 2614 // the check for the "discovered" field should issue a warning if
2615 2615 // the field is not found. For 1.6 this code should be issue a
2616 2616 // fatal error if the "discovered" field is not found.
2617 2617 //
2618 2618 // Increment fac.nonstatic_oop_count so that the start of the
2619 2619 // next type of non-static oops leaves room for the fake oop.
2620 2620 // Do not increment next_nonstatic_oop_offset so that the
2621 2621 // fake oop is place after the java.lang.ref.Reference oop
2622 2622 // fields.
2623 2623 //
2624 2624 // Check the fields in java.lang.ref.Reference for the "discovered"
2625 2625 // field. If it is not present, artifically create a field for it.
2626 2626 // This allows this VM to run on early JDK where the field is not
2627 2627 // present.
2628 2628 int reference_sig_index = 0;
2629 2629 int reference_name_index = 0;
2630 2630 int reference_index = 0;
2631 2631 int extra = java_lang_ref_Reference::number_of_fake_oop_fields;
2632 2632 const int n = (*fields_ptr)()->length();
2633 2633 for (int i = 0; i < n; i += instanceKlass::next_offset ) {
2634 2634 int name_index =
2635 2635 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset);
2636 2636 int sig_index =
2637 2637 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset);
2638 2638 Symbol* f_name = cp->symbol_at(name_index);
2639 2639 Symbol* f_sig = cp->symbol_at(sig_index);
2640 2640 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) {
2641 2641 // Save the index for reference signature for later use.
2642 2642 // The fake discovered field does not entries in the
2643 2643 // constant pool so the index for its signature cannot
2644 2644 // be extracted from the constant pool. It will need
2645 2645 // later, however. It's signature is vmSymbols::reference_signature()
2646 2646 // so same an index for that signature.
2647 2647 reference_sig_index = sig_index;
2648 2648 reference_name_index = name_index;
2649 2649 reference_index = i;
2650 2650 }
2651 2651 if (f_name == vmSymbols::reference_discovered_name() &&
2652 2652 f_sig == vmSymbols::reference_signature()) {
2653 2653 // The values below are fake but will force extra
2654 2654 // non-static oop fields and a corresponding non-static
2655 2655 // oop map block to be allocated.
2656 2656 extra = 0;
2657 2657 break;
2658 2658 }
2659 2659 }
2660 2660 if (extra != 0) {
2661 2661 fac_ptr->nonstatic_oop_count += extra;
2662 2662 // Add the additional entry to "fields" so that the klass
2663 2663 // contains the "discoverd" field and the field will be initialized
2664 2664 // in instances of the object.
2665 2665 int fields_with_fix_length = (*fields_ptr)()->length() +
2666 2666 instanceKlass::next_offset;
2667 2667 typeArrayOop ff = oopFactory::new_permanent_shortArray(
2668 2668 fields_with_fix_length, CHECK);
2669 2669 typeArrayHandle fields_with_fix(THREAD, ff);
2670 2670
2671 2671 // Take everything from the original but the length.
2672 2672 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) {
2673 2673 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx));
2674 2674 }
2675 2675
2676 2676 // Add the fake field at the end.
2677 2677 int i = (*fields_ptr)->length();
2678 2678 // There is no name index for the fake "discovered" field nor
2679 2679 // signature but a signature is needed so that the field will
2680 2680 // be properly initialized. Use one found for
2681 2681 // one of the other reference fields. Be sure the index for the
2682 2682 // name is 0. In fieldDescriptor::initialize() the index of the
2683 2683 // name is checked. That check is by passed for the last nonstatic
2684 2684 // oop field in a java.lang.ref.Reference which is assumed to be
2685 2685 // this artificial "discovered" field. An assertion checks that
2686 2686 // the name index is 0.
2687 2687 assert(reference_index != 0, "Missing signature for reference");
2688 2688
2689 2689 int j;
2690 2690 for (j = 0; j < instanceKlass::next_offset; j++) {
2691 2691 fields_with_fix->ushort_at_put(i + j,
2692 2692 (*fields_ptr)->ushort_at(reference_index +j));
2693 2693 }
2694 2694 // Clear the public access flag and set the private access flag.
2695 2695 short flags;
2696 2696 flags =
2697 2697 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset);
2698 2698 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set");
2699 2699 flags = flags & (~JVM_ACC_PUBLIC);
2700 2700 flags = flags | JVM_ACC_PRIVATE;
2701 2701 AccessFlags access_flags;
2702 2702 access_flags.set_flags(flags);
2703 2703 assert(!access_flags.is_public(), "Failed to clear public flag");
2704 2704 assert(access_flags.is_private(), "Failed to set private flag");
2705 2705 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset,
2706 2706 flags);
2707 2707
2708 2708 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset)
2709 2709 == reference_name_index, "The fake reference name is incorrect");
2710 2710 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset)
2711 2711 == reference_sig_index, "The fake reference signature is incorrect");
2712 2712 // The type of the field is stored in the low_offset entry during
2713 2713 // parsing.
2714 2714 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) ==
2715 2715 NONSTATIC_OOP, "The fake reference type is incorrect");
2716 2716
2717 2717 // "fields" is allocated in the permanent generation. Disgard
2718 2718 // it and let it be collected.
2719 2719 (*fields_ptr) = fields_with_fix;
2720 2720 }
2721 2721 return;
2722 2722 }
2723 2723
2724 2724
2725 2725 void ClassFileParser::java_lang_Class_fix_pre(int* nonstatic_field_size,
2726 2726 FieldAllocationCount *fac_ptr) {
2727 2727 // Add fake fields for java.lang.Class instances
2728 2728 //
2729 2729 // This is not particularly nice. We should consider adding a
2730 2730 // private transient object field at the Java level to
2731 2731 // java.lang.Class. Alternatively we could add a subclass of
2732 2732 // instanceKlass which provides an accessor and size computer for
2733 2733 // this field, but that appears to be more code than this hack.
2734 2734 //
2735 2735 // NOTE that we wedge these in at the beginning rather than the
2736 2736 // end of the object because the Class layout changed between JDK
2737 2737 // 1.3 and JDK 1.4 with the new reflection implementation; some
2738 2738 // nonstatic oop fields were added at the Java level. The offsets
2739 2739 // of these fake fields can't change between these two JDK
2740 2740 // versions because when the offsets are computed at bootstrap
2741 2741 // time we don't know yet which version of the JDK we're running in.
2742 2742
2743 2743 // The values below are fake but will force three non-static oop fields and
2744 2744 // a corresponding non-static oop map block to be allocated.
2745 2745 const int extra = java_lang_Class::number_of_fake_oop_fields;
2746 2746 fac_ptr->nonstatic_oop_count += extra;
2747 2747
2748 2748 // Reserve some leading space for fake ints
2749 2749 *nonstatic_field_size += align_size_up(java_lang_Class::hc_number_of_fake_int_fields * BytesPerInt, heapOopSize) / heapOopSize;
2750 2750 }
2751 2751
2752 2752
2753 2753 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) {
2754 2754 // Cause the extra fake fields in java.lang.Class to show up before
2755 2755 // the Java fields for layout compatibility between 1.3 and 1.4
2756 2756 // Incrementing next_nonstatic_oop_offset here advances the
2757 2757 // location where the real java fields are placed.
2758 2758 const int extra = java_lang_Class::number_of_fake_oop_fields;
2759 2759 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize);
2760 2760 }
2761 2761
2762 2762
2763 2763 // Force MethodHandle.vmentry to be an unmanaged pointer.
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2764 2764 // There is no way for a classfile to express this, so we must help it.
2765 2765 void ClassFileParser::java_lang_invoke_MethodHandle_fix_pre(constantPoolHandle cp,
2766 2766 typeArrayHandle fields,
2767 2767 FieldAllocationCount *fac_ptr,
2768 2768 TRAPS) {
2769 2769 // Add fake fields for java.lang.invoke.MethodHandle instances
2770 2770 //
2771 2771 // This is not particularly nice, but since there is no way to express
2772 2772 // a native wordSize field in Java, we must do it at this level.
2773 2773
2774 - if (!EnableMethodHandles) return;
2774 + if (!EnableInvokeDynamic) return;
2775 2775
2776 2776 int word_sig_index = 0;
2777 2777 const int cp_size = cp->length();
2778 2778 for (int index = 1; index < cp_size; index++) {
2779 2779 if (cp->tag_at(index).is_utf8() &&
2780 2780 cp->symbol_at(index) == vmSymbols::machine_word_signature()) {
2781 2781 word_sig_index = index;
2782 2782 break;
2783 2783 }
2784 2784 }
2785 2785
2786 2786 if (AllowTransitionalJSR292 && word_sig_index == 0) return;
2787 2787 if (word_sig_index == 0)
2788 2788 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2789 2789 "missing I or J signature (for vmentry) in java.lang.invoke.MethodHandle");
2790 2790
2791 2791 // Find vmentry field and change the signature.
2792 2792 bool found_vmentry = false;
2793 2793 for (int i = 0; i < fields->length(); i += instanceKlass::next_offset) {
2794 2794 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
2795 2795 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
2796 2796 int acc_flags = fields->ushort_at(i + instanceKlass::access_flags_offset);
2797 2797 Symbol* f_name = cp->symbol_at(name_index);
2798 2798 Symbol* f_sig = cp->symbol_at(sig_index);
2799 2799 if (f_name == vmSymbols::vmentry_name() && (acc_flags & JVM_ACC_STATIC) == 0) {
2800 2800 if (f_sig == vmSymbols::machine_word_signature()) {
2801 2801 // If the signature of vmentry is already changed, we're done.
2802 2802 found_vmentry = true;
2803 2803 break;
2804 2804 }
2805 2805 else if (f_sig == vmSymbols::byte_signature()) {
2806 2806 // Adjust the field type from byte to an unmanaged pointer.
2807 2807 assert(fac_ptr->nonstatic_byte_count > 0, "");
2808 2808 fac_ptr->nonstatic_byte_count -= 1;
2809 2809
2810 2810 fields->ushort_at_put(i + instanceKlass::signature_index_offset, word_sig_index);
2811 2811 assert(wordSize == longSize || wordSize == jintSize, "ILP32 or LP64");
2812 2812 if (wordSize == longSize) fac_ptr->nonstatic_double_count += 1;
2813 2813 else fac_ptr->nonstatic_word_count += 1;
2814 2814
2815 2815 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
2816 2816 assert(atype == NONSTATIC_BYTE, "");
2817 2817 FieldAllocationType new_atype = (wordSize == longSize) ? NONSTATIC_DOUBLE : NONSTATIC_WORD;
2818 2818 fields->ushort_at_put(i + instanceKlass::low_offset, new_atype);
2819 2819
2820 2820 found_vmentry = true;
2821 2821 break;
2822 2822 }
2823 2823 }
2824 2824 }
2825 2825
2826 2826 if (AllowTransitionalJSR292 && !found_vmentry) return;
2827 2827 if (!found_vmentry)
2828 2828 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2829 2829 "missing vmentry byte field in java.lang.invoke.MethodHandle");
2830 2830 }
2831 2831
2832 2832
2833 2833 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2834 2834 Handle class_loader,
2835 2835 Handle protection_domain,
2836 2836 KlassHandle host_klass,
2837 2837 GrowableArray<Handle>* cp_patches,
2838 2838 TempNewSymbol& parsed_name,
2839 2839 bool verify,
2840 2840 TRAPS) {
2841 2841 // So that JVMTI can cache class file in the state before retransformable agents
2842 2842 // have modified it
2843 2843 unsigned char *cached_class_file_bytes = NULL;
2844 2844 jint cached_class_file_length;
2845 2845
2846 2846 ClassFileStream* cfs = stream();
2847 2847 // Timing
2848 2848 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2849 2849 JavaThread* jt = (JavaThread*) THREAD;
2850 2850
2851 2851 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2852 2852 ClassLoader::perf_class_parse_selftime(),
2853 2853 NULL,
2854 2854 jt->get_thread_stat()->perf_recursion_counts_addr(),
2855 2855 jt->get_thread_stat()->perf_timers_addr(),
2856 2856 PerfClassTraceTime::PARSE_CLASS);
2857 2857
2858 2858 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
2859 2859 _max_bootstrap_specifier_index = -1;
2860 2860
2861 2861 if (JvmtiExport::should_post_class_file_load_hook()) {
2862 2862 unsigned char* ptr = cfs->buffer();
2863 2863 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2864 2864
2865 2865 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2866 2866 &ptr, &end_ptr,
2867 2867 &cached_class_file_bytes,
2868 2868 &cached_class_file_length);
2869 2869
2870 2870 if (ptr != cfs->buffer()) {
2871 2871 // JVMTI agent has modified class file data.
2872 2872 // Set new class file stream using JVMTI agent modified
2873 2873 // class file data.
2874 2874 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2875 2875 set_stream(cfs);
2876 2876 }
2877 2877 }
2878 2878
2879 2879 _host_klass = host_klass;
2880 2880 _cp_patches = cp_patches;
2881 2881
2882 2882 instanceKlassHandle nullHandle;
2883 2883
2884 2884 // Figure out whether we can skip format checking (matching classic VM behavior)
2885 2885 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2886 2886
2887 2887 // Set the verify flag in stream
2888 2888 cfs->set_verify(_need_verify);
2889 2889
2890 2890 // Save the class file name for easier error message printing.
2891 2891 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2892 2892
2893 2893 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2894 2894 // Magic value
2895 2895 u4 magic = cfs->get_u4_fast();
2896 2896 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2897 2897 "Incompatible magic value %u in class file %s",
2898 2898 magic, CHECK_(nullHandle));
2899 2899
2900 2900 // Version numbers
2901 2901 u2 minor_version = cfs->get_u2_fast();
2902 2902 u2 major_version = cfs->get_u2_fast();
2903 2903
2904 2904 // Check version numbers - we check this even with verifier off
2905 2905 if (!is_supported_version(major_version, minor_version)) {
2906 2906 if (name == NULL) {
2907 2907 Exceptions::fthrow(
2908 2908 THREAD_AND_LOCATION,
2909 2909 vmSymbols::java_lang_UnsupportedClassVersionError(),
2910 2910 "Unsupported major.minor version %u.%u",
2911 2911 major_version,
2912 2912 minor_version);
2913 2913 } else {
2914 2914 ResourceMark rm(THREAD);
2915 2915 Exceptions::fthrow(
2916 2916 THREAD_AND_LOCATION,
2917 2917 vmSymbols::java_lang_UnsupportedClassVersionError(),
2918 2918 "%s : Unsupported major.minor version %u.%u",
2919 2919 name->as_C_string(),
2920 2920 major_version,
2921 2921 minor_version);
2922 2922 }
2923 2923 return nullHandle;
2924 2924 }
2925 2925
2926 2926 _major_version = major_version;
2927 2927 _minor_version = minor_version;
2928 2928
2929 2929
2930 2930 // Check if verification needs to be relaxed for this class file
2931 2931 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
2932 2932 _relax_verify = Verifier::relax_verify_for(class_loader());
2933 2933
2934 2934 // Constant pool
2935 2935 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
2936 2936 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
2937 2937
2938 2938 int cp_size = cp->length();
2939 2939
2940 2940 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
2941 2941
2942 2942 // Access flags
2943 2943 AccessFlags access_flags;
2944 2944 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
2945 2945
2946 2946 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2947 2947 // Set abstract bit for old class files for backward compatibility
2948 2948 flags |= JVM_ACC_ABSTRACT;
2949 2949 }
2950 2950 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
2951 2951 access_flags.set_flags(flags);
2952 2952
2953 2953 // This class and superclass
2954 2954 instanceKlassHandle super_klass;
2955 2955 u2 this_class_index = cfs->get_u2_fast();
2956 2956 check_property(
2957 2957 valid_cp_range(this_class_index, cp_size) &&
2958 2958 cp->tag_at(this_class_index).is_unresolved_klass(),
2959 2959 "Invalid this class index %u in constant pool in class file %s",
2960 2960 this_class_index, CHECK_(nullHandle));
2961 2961
2962 2962 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
2963 2963 assert(class_name != NULL, "class_name can't be null");
2964 2964
2965 2965 // It's important to set parsed_name *before* resolving the super class.
2966 2966 // (it's used for cleanup by the caller if parsing fails)
2967 2967 parsed_name = class_name;
2968 2968 // parsed_name is returned and can be used if there's an error, so add to
2969 2969 // its reference count. Caller will decrement the refcount.
2970 2970 parsed_name->increment_refcount();
2971 2971
2972 2972 // Update _class_name which could be null previously to be class_name
2973 2973 _class_name = class_name;
2974 2974
2975 2975 // Don't need to check whether this class name is legal or not.
2976 2976 // It has been checked when constant pool is parsed.
2977 2977 // However, make sure it is not an array type.
2978 2978 if (_need_verify) {
2979 2979 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
2980 2980 "Bad class name in class file %s",
2981 2981 CHECK_(nullHandle));
2982 2982 }
2983 2983
2984 2984 klassOop preserve_this_klass; // for storing result across HandleMark
2985 2985
2986 2986 // release all handles when parsing is done
2987 2987 { HandleMark hm(THREAD);
2988 2988
2989 2989 // Checks if name in class file matches requested name
2990 2990 if (name != NULL && class_name != name) {
2991 2991 ResourceMark rm(THREAD);
2992 2992 Exceptions::fthrow(
2993 2993 THREAD_AND_LOCATION,
2994 2994 vmSymbols::java_lang_NoClassDefFoundError(),
2995 2995 "%s (wrong name: %s)",
2996 2996 name->as_C_string(),
2997 2997 class_name->as_C_string()
2998 2998 );
2999 2999 return nullHandle;
3000 3000 }
3001 3001
3002 3002 if (TraceClassLoadingPreorder) {
3003 3003 tty->print("[Loading %s", name->as_klass_external_name());
3004 3004 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3005 3005 tty->print_cr("]");
3006 3006 }
3007 3007
3008 3008 u2 super_class_index = cfs->get_u2_fast();
3009 3009 if (super_class_index == 0) {
3010 3010 check_property(class_name == vmSymbols::java_lang_Object(),
3011 3011 "Invalid superclass index %u in class file %s",
3012 3012 super_class_index,
3013 3013 CHECK_(nullHandle));
3014 3014 } else {
3015 3015 check_property(valid_cp_range(super_class_index, cp_size) &&
3016 3016 is_klass_reference(cp, super_class_index),
3017 3017 "Invalid superclass index %u in class file %s",
3018 3018 super_class_index,
3019 3019 CHECK_(nullHandle));
3020 3020 // The class name should be legal because it is checked when parsing constant pool.
3021 3021 // However, make sure it is not an array type.
3022 3022 bool is_array = false;
3023 3023 if (cp->tag_at(super_class_index).is_klass()) {
3024 3024 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3025 3025 if (_need_verify)
3026 3026 is_array = super_klass->oop_is_array();
3027 3027 } else if (_need_verify) {
3028 3028 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3029 3029 }
3030 3030 if (_need_verify) {
3031 3031 guarantee_property(!is_array,
3032 3032 "Bad superclass name in class file %s", CHECK_(nullHandle));
3033 3033 }
3034 3034 }
3035 3035
3036 3036 // Interfaces
3037 3037 u2 itfs_len = cfs->get_u2_fast();
3038 3038 objArrayHandle local_interfaces;
3039 3039 if (itfs_len == 0) {
3040 3040 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3041 3041 } else {
3042 3042 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
3043 3043 }
3044 3044
3045 3045 // Fields (offsets are filled in later)
3046 3046 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0};
3047 3047 objArrayHandle fields_annotations;
3048 3048 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle));
3049 3049 // Methods
3050 3050 bool has_final_method = false;
3051 3051 AccessFlags promoted_flags;
3052 3052 promoted_flags.set_flags(0);
3053 3053 // These need to be oop pointers because they are allocated lazily
3054 3054 // inside parse_methods inside a nested HandleMark
3055 3055 objArrayOop methods_annotations_oop = NULL;
3056 3056 objArrayOop methods_parameter_annotations_oop = NULL;
3057 3057 objArrayOop methods_default_annotations_oop = NULL;
3058 3058 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
3059 3059 &promoted_flags,
3060 3060 &has_final_method,
3061 3061 &methods_annotations_oop,
3062 3062 &methods_parameter_annotations_oop,
3063 3063 &methods_default_annotations_oop,
3064 3064 CHECK_(nullHandle));
3065 3065
3066 3066 objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
3067 3067 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
3068 3068 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
3069 3069
3070 3070 // We check super class after class file is parsed and format is checked
3071 3071 if (super_class_index > 0 && super_klass.is_null()) {
3072 3072 Symbol* sk = cp->klass_name_at(super_class_index);
3073 3073 if (access_flags.is_interface()) {
3074 3074 // Before attempting to resolve the superclass, check for class format
3075 3075 // errors not checked yet.
3076 3076 guarantee_property(sk == vmSymbols::java_lang_Object(),
3077 3077 "Interfaces must have java.lang.Object as superclass in class file %s",
3078 3078 CHECK_(nullHandle));
3079 3079 }
3080 3080 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
3081 3081 sk,
3082 3082 class_loader,
3083 3083 protection_domain,
3084 3084 true,
3085 3085 CHECK_(nullHandle));
3086 3086
3087 3087 KlassHandle kh (THREAD, k);
3088 3088 super_klass = instanceKlassHandle(THREAD, kh());
3089 3089 if (LinkWellKnownClasses) // my super class is well known to me
3090 3090 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
3091 3091 }
3092 3092 if (super_klass.not_null()) {
3093 3093 if (super_klass->is_interface()) {
3094 3094 ResourceMark rm(THREAD);
3095 3095 Exceptions::fthrow(
3096 3096 THREAD_AND_LOCATION,
3097 3097 vmSymbols::java_lang_IncompatibleClassChangeError(),
3098 3098 "class %s has interface %s as super class",
3099 3099 class_name->as_klass_external_name(),
3100 3100 super_klass->external_name()
3101 3101 );
3102 3102 return nullHandle;
3103 3103 }
3104 3104 // Make sure super class is not final
3105 3105 if (super_klass->is_final()) {
3106 3106 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3107 3107 }
3108 3108 }
3109 3109
3110 3110 // Compute the transitive list of all unique interfaces implemented by this class
3111 3111 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
3112 3112
3113 3113 // sort methods
3114 3114 typeArrayHandle method_ordering = sort_methods(methods,
3115 3115 methods_annotations,
3116 3116 methods_parameter_annotations,
3117 3117 methods_default_annotations,
3118 3118 CHECK_(nullHandle));
3119 3119
3120 3120 // promote flags from parse_methods() to the klass' flags
3121 3121 access_flags.add_promoted_flags(promoted_flags.as_int());
3122 3122
3123 3123 // Size of Java vtable (in words)
3124 3124 int vtable_size = 0;
3125 3125 int itable_size = 0;
3126 3126 int num_miranda_methods = 0;
3127 3127
3128 3128 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3129 3129 num_miranda_methods,
3130 3130 super_klass(),
3131 3131 methods(),
3132 3132 access_flags,
3133 3133 class_loader,
3134 3134 class_name,
3135 3135 local_interfaces(),
3136 3136 CHECK_(nullHandle));
3137 3137
3138 3138 // Size of Java itable (in words)
3139 3139 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3140 3140
3141 3141 // Field size and offset computation
3142 3142 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3143 3143 #ifndef PRODUCT
3144 3144 int orig_nonstatic_field_size = 0;
3145 3145 #endif
3146 3146 int static_field_size = 0;
3147 3147 int next_static_oop_offset;
3148 3148 int next_static_double_offset;
3149 3149 int next_static_word_offset;
3150 3150 int next_static_short_offset;
3151 3151 int next_static_byte_offset;
3152 3152 int next_static_type_offset;
3153 3153 int next_nonstatic_oop_offset;
3154 3154 int next_nonstatic_double_offset;
3155 3155 int next_nonstatic_word_offset;
3156 3156 int next_nonstatic_short_offset;
3157 3157 int next_nonstatic_byte_offset;
3158 3158 int next_nonstatic_type_offset;
3159 3159 int first_nonstatic_oop_offset;
3160 3160 int first_nonstatic_field_offset;
3161 3161 int next_nonstatic_field_offset;
3162 3162
3163 3163 // Calculate the starting byte offsets
3164 3164 next_static_oop_offset = instanceMirrorKlass::offset_of_static_fields();
3165 3165 next_static_double_offset = next_static_oop_offset +
3166 3166 (fac.static_oop_count * heapOopSize);
3167 3167 if ( fac.static_double_count &&
3168 3168 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3169 3169 Universe::field_type_should_be_aligned(T_LONG)) ) {
3170 3170 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3171 3171 }
3172 3172
3173 3173 next_static_word_offset = next_static_double_offset +
3174 3174 (fac.static_double_count * BytesPerLong);
3175 3175 next_static_short_offset = next_static_word_offset +
3176 3176 (fac.static_word_count * BytesPerInt);
3177 3177 next_static_byte_offset = next_static_short_offset +
3178 3178 (fac.static_short_count * BytesPerShort);
3179 3179 next_static_type_offset = align_size_up((next_static_byte_offset +
3180 3180 fac.static_byte_count ), wordSize );
3181 3181 static_field_size = (next_static_type_offset -
3182 3182 next_static_oop_offset) / wordSize;
3183 3183
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3184 3184 // Add fake fields for java.lang.Class instances (also see below)
3185 3185 if (class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) {
3186 3186 java_lang_Class_fix_pre(&nonstatic_field_size, &fac);
3187 3187 }
3188 3188
3189 3189 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3190 3190 nonstatic_field_size * heapOopSize;
3191 3191 next_nonstatic_field_offset = first_nonstatic_field_offset;
3192 3192
3193 3193 // adjust the vmentry field declaration in java.lang.invoke.MethodHandle
3194 - if (EnableMethodHandles && class_name == vmSymbols::java_lang_invoke_MethodHandle() && class_loader.is_null()) {
3194 + if (EnableInvokeDynamic && class_name == vmSymbols::java_lang_invoke_MethodHandle() && class_loader.is_null()) {
3195 3195 java_lang_invoke_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle));
3196 3196 }
3197 3197 if (AllowTransitionalJSR292 &&
3198 - EnableMethodHandles && class_name == vmSymbols::java_dyn_MethodHandle() && class_loader.is_null()) {
3198 + EnableInvokeDynamic && class_name == vmSymbols::java_dyn_MethodHandle() && class_loader.is_null()) {
3199 3199 java_lang_invoke_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle));
3200 3200 }
3201 3201 if (AllowTransitionalJSR292 &&
3202 - EnableMethodHandles && class_name == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) {
3202 + EnableInvokeDynamic && class_name == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) {
3203 3203 // allow vmentry field in MethodHandleImpl also
3204 3204 java_lang_invoke_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle));
3205 3205 }
3206 3206
3207 3207 // Add a fake "discovered" field if it is not present
3208 3208 // for compatibility with earlier jdk's.
3209 3209 if (class_name == vmSymbols::java_lang_ref_Reference()
3210 3210 && class_loader.is_null()) {
3211 3211 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle));
3212 3212 }
3213 3213 // end of "discovered" field compactibility fix
3214 3214
3215 3215 unsigned int nonstatic_double_count = fac.nonstatic_double_count;
3216 3216 unsigned int nonstatic_word_count = fac.nonstatic_word_count;
3217 3217 unsigned int nonstatic_short_count = fac.nonstatic_short_count;
3218 3218 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count;
3219 3219 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count;
3220 3220
3221 3221 bool super_has_nonstatic_fields =
3222 3222 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3223 3223 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3224 3224 ((nonstatic_double_count + nonstatic_word_count +
3225 3225 nonstatic_short_count + nonstatic_byte_count +
3226 3226 nonstatic_oop_count) != 0);
3227 3227
3228 3228
3229 3229 // Prepare list of oops for oop map generation.
3230 3230 int* nonstatic_oop_offsets;
3231 3231 unsigned int* nonstatic_oop_counts;
3232 3232 unsigned int nonstatic_oop_map_count = 0;
3233 3233
3234 3234 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3235 3235 THREAD, int, nonstatic_oop_count + 1);
3236 3236 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3237 3237 THREAD, unsigned int, nonstatic_oop_count + 1);
3238 3238
3239 3239 // Add fake fields for java.lang.Class instances (also see above).
3240 3240 // FieldsAllocationStyle and CompactFields values will be reset to default.
3241 3241 if(class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) {
3242 3242 java_lang_Class_fix_post(&next_nonstatic_field_offset);
3243 3243 nonstatic_oop_offsets[0] = first_nonstatic_field_offset;
3244 3244 const uint fake_oop_count = (next_nonstatic_field_offset -
3245 3245 first_nonstatic_field_offset) / heapOopSize;
3246 3246 nonstatic_oop_counts[0] = fake_oop_count;
3247 3247 nonstatic_oop_map_count = 1;
3248 3248 nonstatic_oop_count -= fake_oop_count;
3249 3249 first_nonstatic_oop_offset = first_nonstatic_field_offset;
3250 3250 } else {
3251 3251 first_nonstatic_oop_offset = 0; // will be set for first oop field
3252 3252 }
3253 3253
3254 3254 #ifndef PRODUCT
3255 3255 if( PrintCompactFieldsSavings ) {
3256 3256 next_nonstatic_double_offset = next_nonstatic_field_offset +
3257 3257 (nonstatic_oop_count * heapOopSize);
3258 3258 if ( nonstatic_double_count > 0 ) {
3259 3259 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3260 3260 }
3261 3261 next_nonstatic_word_offset = next_nonstatic_double_offset +
3262 3262 (nonstatic_double_count * BytesPerLong);
3263 3263 next_nonstatic_short_offset = next_nonstatic_word_offset +
3264 3264 (nonstatic_word_count * BytesPerInt);
3265 3265 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3266 3266 (nonstatic_short_count * BytesPerShort);
3267 3267 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3268 3268 nonstatic_byte_count ), heapOopSize );
3269 3269 orig_nonstatic_field_size = nonstatic_field_size +
3270 3270 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3271 3271 }
3272 3272 #endif
3273 3273 bool compact_fields = CompactFields;
3274 3274 int allocation_style = FieldsAllocationStyle;
3275 3275 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3276 3276 assert(false, "0 <= FieldsAllocationStyle <= 2");
3277 3277 allocation_style = 1; // Optimistic
3278 3278 }
3279 3279
3280 3280 // The next classes have predefined hard-coded fields offsets
3281 3281 // (see in JavaClasses::compute_hard_coded_offsets()).
3282 3282 // Use default fields allocation order for them.
3283 3283 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3284 3284 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3285 3285 class_name == vmSymbols::java_lang_Class() ||
3286 3286 class_name == vmSymbols::java_lang_ClassLoader() ||
3287 3287 class_name == vmSymbols::java_lang_ref_Reference() ||
3288 3288 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3289 3289 class_name == vmSymbols::java_lang_StackTraceElement() ||
3290 3290 class_name == vmSymbols::java_lang_String() ||
3291 3291 class_name == vmSymbols::java_lang_Throwable() ||
3292 3292 class_name == vmSymbols::java_lang_Boolean() ||
3293 3293 class_name == vmSymbols::java_lang_Character() ||
3294 3294 class_name == vmSymbols::java_lang_Float() ||
3295 3295 class_name == vmSymbols::java_lang_Double() ||
3296 3296 class_name == vmSymbols::java_lang_Byte() ||
3297 3297 class_name == vmSymbols::java_lang_Short() ||
3298 3298 class_name == vmSymbols::java_lang_Integer() ||
3299 3299 class_name == vmSymbols::java_lang_Long())) {
3300 3300 allocation_style = 0; // Allocate oops first
3301 3301 compact_fields = false; // Don't compact fields
3302 3302 }
3303 3303
3304 3304 if( allocation_style == 0 ) {
3305 3305 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3306 3306 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3307 3307 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3308 3308 (nonstatic_oop_count * heapOopSize);
3309 3309 } else if( allocation_style == 1 ) {
3310 3310 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3311 3311 next_nonstatic_double_offset = next_nonstatic_field_offset;
3312 3312 } else if( allocation_style == 2 ) {
3313 3313 // Fields allocation: oops fields in super and sub classes are together.
3314 3314 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3315 3315 super_klass->nonstatic_oop_map_size() > 0 ) {
3316 3316 int map_size = super_klass->nonstatic_oop_map_size();
3317 3317 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3318 3318 OopMapBlock* last_map = first_map + map_size - 1;
3319 3319 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3320 3320 if (next_offset == next_nonstatic_field_offset) {
3321 3321 allocation_style = 0; // allocate oops first
3322 3322 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3323 3323 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3324 3324 (nonstatic_oop_count * heapOopSize);
3325 3325 }
3326 3326 }
3327 3327 if( allocation_style == 2 ) {
3328 3328 allocation_style = 1; // allocate oops last
3329 3329 next_nonstatic_double_offset = next_nonstatic_field_offset;
3330 3330 }
3331 3331 } else {
3332 3332 ShouldNotReachHere();
3333 3333 }
3334 3334
3335 3335 int nonstatic_oop_space_count = 0;
3336 3336 int nonstatic_word_space_count = 0;
3337 3337 int nonstatic_short_space_count = 0;
3338 3338 int nonstatic_byte_space_count = 0;
3339 3339 int nonstatic_oop_space_offset;
3340 3340 int nonstatic_word_space_offset;
3341 3341 int nonstatic_short_space_offset;
3342 3342 int nonstatic_byte_space_offset;
3343 3343
3344 3344 if( nonstatic_double_count > 0 ) {
3345 3345 int offset = next_nonstatic_double_offset;
3346 3346 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3347 3347 if( compact_fields && offset != next_nonstatic_double_offset ) {
3348 3348 // Allocate available fields into the gap before double field.
3349 3349 int length = next_nonstatic_double_offset - offset;
3350 3350 assert(length == BytesPerInt, "");
3351 3351 nonstatic_word_space_offset = offset;
3352 3352 if( nonstatic_word_count > 0 ) {
3353 3353 nonstatic_word_count -= 1;
3354 3354 nonstatic_word_space_count = 1; // Only one will fit
3355 3355 length -= BytesPerInt;
3356 3356 offset += BytesPerInt;
3357 3357 }
3358 3358 nonstatic_short_space_offset = offset;
3359 3359 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3360 3360 nonstatic_short_count -= 1;
3361 3361 nonstatic_short_space_count += 1;
3362 3362 length -= BytesPerShort;
3363 3363 offset += BytesPerShort;
3364 3364 }
3365 3365 nonstatic_byte_space_offset = offset;
3366 3366 while( length > 0 && nonstatic_byte_count > 0 ) {
3367 3367 nonstatic_byte_count -= 1;
3368 3368 nonstatic_byte_space_count += 1;
3369 3369 length -= 1;
3370 3370 }
3371 3371 // Allocate oop field in the gap if there are no other fields for that.
3372 3372 nonstatic_oop_space_offset = offset;
3373 3373 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3374 3374 allocation_style != 0 ) { // when oop fields not first
3375 3375 nonstatic_oop_count -= 1;
3376 3376 nonstatic_oop_space_count = 1; // Only one will fit
3377 3377 length -= heapOopSize;
3378 3378 offset += heapOopSize;
3379 3379 }
3380 3380 }
3381 3381 }
3382 3382
3383 3383 next_nonstatic_word_offset = next_nonstatic_double_offset +
3384 3384 (nonstatic_double_count * BytesPerLong);
3385 3385 next_nonstatic_short_offset = next_nonstatic_word_offset +
3386 3386 (nonstatic_word_count * BytesPerInt);
3387 3387 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3388 3388 (nonstatic_short_count * BytesPerShort);
3389 3389
3390 3390 int notaligned_offset;
3391 3391 if( allocation_style == 0 ) {
3392 3392 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3393 3393 } else { // allocation_style == 1
3394 3394 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3395 3395 if( nonstatic_oop_count > 0 ) {
3396 3396 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3397 3397 }
3398 3398 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3399 3399 }
3400 3400 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3401 3401 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3402 3402 - first_nonstatic_field_offset)/heapOopSize);
3403 3403
3404 3404 // Iterate over fields again and compute correct offsets.
3405 3405 // The field allocation type was temporarily stored in the offset slot.
3406 3406 // oop fields are located before non-oop fields (static and non-static).
3407 3407 int len = fields->length();
3408 3408 for (int i = 0; i < len; i += instanceKlass::next_offset) {
3409 3409 int real_offset;
3410 3410 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
3411 3411 switch (atype) {
3412 3412 case STATIC_OOP:
3413 3413 real_offset = next_static_oop_offset;
3414 3414 next_static_oop_offset += heapOopSize;
3415 3415 break;
3416 3416 case STATIC_BYTE:
3417 3417 real_offset = next_static_byte_offset;
3418 3418 next_static_byte_offset += 1;
3419 3419 break;
3420 3420 case STATIC_SHORT:
3421 3421 real_offset = next_static_short_offset;
3422 3422 next_static_short_offset += BytesPerShort;
3423 3423 break;
3424 3424 case STATIC_WORD:
3425 3425 real_offset = next_static_word_offset;
3426 3426 next_static_word_offset += BytesPerInt;
3427 3427 break;
3428 3428 case STATIC_ALIGNED_DOUBLE:
3429 3429 case STATIC_DOUBLE:
3430 3430 real_offset = next_static_double_offset;
3431 3431 next_static_double_offset += BytesPerLong;
3432 3432 break;
3433 3433 case NONSTATIC_OOP:
3434 3434 if( nonstatic_oop_space_count > 0 ) {
3435 3435 real_offset = nonstatic_oop_space_offset;
3436 3436 nonstatic_oop_space_offset += heapOopSize;
3437 3437 nonstatic_oop_space_count -= 1;
3438 3438 } else {
3439 3439 real_offset = next_nonstatic_oop_offset;
3440 3440 next_nonstatic_oop_offset += heapOopSize;
3441 3441 }
3442 3442 // Update oop maps
3443 3443 if( nonstatic_oop_map_count > 0 &&
3444 3444 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3445 3445 real_offset -
3446 3446 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3447 3447 heapOopSize ) {
3448 3448 // Extend current oop map
3449 3449 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3450 3450 } else {
3451 3451 // Create new oop map
3452 3452 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3453 3453 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3454 3454 nonstatic_oop_map_count += 1;
3455 3455 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3456 3456 first_nonstatic_oop_offset = real_offset;
3457 3457 }
3458 3458 }
3459 3459 break;
3460 3460 case NONSTATIC_BYTE:
3461 3461 if( nonstatic_byte_space_count > 0 ) {
3462 3462 real_offset = nonstatic_byte_space_offset;
3463 3463 nonstatic_byte_space_offset += 1;
3464 3464 nonstatic_byte_space_count -= 1;
3465 3465 } else {
3466 3466 real_offset = next_nonstatic_byte_offset;
3467 3467 next_nonstatic_byte_offset += 1;
3468 3468 }
3469 3469 break;
3470 3470 case NONSTATIC_SHORT:
3471 3471 if( nonstatic_short_space_count > 0 ) {
3472 3472 real_offset = nonstatic_short_space_offset;
3473 3473 nonstatic_short_space_offset += BytesPerShort;
3474 3474 nonstatic_short_space_count -= 1;
3475 3475 } else {
3476 3476 real_offset = next_nonstatic_short_offset;
3477 3477 next_nonstatic_short_offset += BytesPerShort;
3478 3478 }
3479 3479 break;
3480 3480 case NONSTATIC_WORD:
3481 3481 if( nonstatic_word_space_count > 0 ) {
3482 3482 real_offset = nonstatic_word_space_offset;
3483 3483 nonstatic_word_space_offset += BytesPerInt;
3484 3484 nonstatic_word_space_count -= 1;
3485 3485 } else {
3486 3486 real_offset = next_nonstatic_word_offset;
3487 3487 next_nonstatic_word_offset += BytesPerInt;
3488 3488 }
3489 3489 break;
3490 3490 case NONSTATIC_ALIGNED_DOUBLE:
3491 3491 case NONSTATIC_DOUBLE:
3492 3492 real_offset = next_nonstatic_double_offset;
3493 3493 next_nonstatic_double_offset += BytesPerLong;
3494 3494 break;
3495 3495 default:
3496 3496 ShouldNotReachHere();
3497 3497 }
3498 3498 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
3499 3499 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
3500 3500 }
3501 3501
3502 3502 // Size of instances
3503 3503 int instance_size;
3504 3504
3505 3505 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3506 3506 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3507 3507
3508 3508 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3509 3509
3510 3510 // Number of non-static oop map blocks allocated at end of klass.
3511 3511 const unsigned int total_oop_map_count =
3512 3512 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3513 3513 first_nonstatic_oop_offset);
3514 3514
3515 3515 // Compute reference type
3516 3516 ReferenceType rt;
3517 3517 if (super_klass() == NULL) {
3518 3518 rt = REF_NONE;
3519 3519 } else {
3520 3520 rt = super_klass->reference_type();
3521 3521 }
3522 3522
3523 3523 // We can now create the basic klassOop for this klass
3524 3524 klassOop ik = oopFactory::new_instanceKlass(name, vtable_size, itable_size,
3525 3525 static_field_size,
3526 3526 total_oop_map_count,
3527 3527 rt, CHECK_(nullHandle));
3528 3528 instanceKlassHandle this_klass (THREAD, ik);
3529 3529
3530 3530 assert(this_klass->static_field_size() == static_field_size, "sanity");
3531 3531 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3532 3532 "sanity");
3533 3533
3534 3534 // Fill in information already parsed
3535 3535 this_klass->set_access_flags(access_flags);
3536 3536 this_klass->set_should_verify_class(verify);
3537 3537 jint lh = Klass::instance_layout_helper(instance_size, false);
3538 3538 this_klass->set_layout_helper(lh);
3539 3539 assert(this_klass->oop_is_instance(), "layout is correct");
3540 3540 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3541 3541 // Not yet: supers are done below to support the new subtype-checking fields
3542 3542 //this_klass->set_super(super_klass());
3543 3543 this_klass->set_class_loader(class_loader());
3544 3544 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3545 3545 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3546 3546 this_klass->set_static_oop_field_count(fac.static_oop_count);
3547 3547 cp->set_pool_holder(this_klass());
3548 3548 error_handler.set_in_error(false); // turn off error handler for cp
3549 3549 this_klass->set_constants(cp());
3550 3550 this_klass->set_local_interfaces(local_interfaces());
3551 3551 this_klass->set_fields(fields());
3552 3552 this_klass->set_methods(methods());
3553 3553 if (has_final_method) {
3554 3554 this_klass->set_has_final_method();
3555 3555 }
3556 3556 this_klass->set_method_ordering(method_ordering());
3557 3557 // The instanceKlass::_methods_jmethod_ids cache and the
3558 3558 // instanceKlass::_methods_cached_itable_indices cache are
3559 3559 // both managed on the assumption that the initial cache
3560 3560 // size is equal to the number of methods in the class. If
3561 3561 // that changes, then instanceKlass::idnum_can_increment()
3562 3562 // has to be changed accordingly.
3563 3563 this_klass->set_initial_method_idnum(methods->length());
3564 3564 this_klass->set_name(cp->klass_name_at(this_class_index));
3565 3565 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself
3566 3566 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3567 3567 this_klass->set_protection_domain(protection_domain());
3568 3568 this_klass->set_fields_annotations(fields_annotations());
3569 3569 this_klass->set_methods_annotations(methods_annotations());
3570 3570 this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3571 3571 this_klass->set_methods_default_annotations(methods_default_annotations());
3572 3572
3573 3573 this_klass->set_minor_version(minor_version);
3574 3574 this_klass->set_major_version(major_version);
3575 3575
3576 3576 // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3577 3577 // (We used to do this lazily, but now we query it in Rewriter,
3578 3578 // which is eagerly done for every method, so we might as well do it now,
3579 3579 // when everything is fresh in memory.)
3580 3580 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3581 3581 for (int j = 0; j < methods->length(); j++) {
3582 3582 ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3583 3583 }
3584 3584 }
3585 3585
3586 3586 if (cached_class_file_bytes != NULL) {
3587 3587 // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3588 3588 this_klass->set_cached_class_file(cached_class_file_bytes,
3589 3589 cached_class_file_length);
3590 3590 }
3591 3591
3592 3592 // Miranda methods
3593 3593 if ((num_miranda_methods > 0) ||
3594 3594 // if this class introduced new miranda methods or
3595 3595 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3596 3596 // super class exists and this class inherited miranda methods
3597 3597 ) {
3598 3598 this_klass->set_has_miranda_methods(); // then set a flag
3599 3599 }
3600 3600
3601 3601 // Additional attributes
3602 3602 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
3603 3603
3604 3604 // Make sure this is the end of class file stream
3605 3605 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3606 3606
3607 3607 // VerifyOops believes that once this has been set, the object is completely loaded.
3608 3608 // Compute transitive closure of interfaces this class implements
3609 3609 this_klass->set_transitive_interfaces(transitive_interfaces());
3610 3610
3611 3611 // Fill in information needed to compute superclasses.
3612 3612 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3613 3613
3614 3614 // Initialize itable offset tables
3615 3615 klassItable::setup_itable_offset_table(this_klass);
3616 3616
3617 3617 // Do final class setup
3618 3618 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3619 3619
3620 3620 set_precomputed_flags(this_klass);
3621 3621
3622 3622 // reinitialize modifiers, using the InnerClasses attribute
3623 3623 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3624 3624 this_klass->set_modifier_flags(computed_modifiers);
3625 3625
3626 3626 // check if this class can access its super class
3627 3627 check_super_class_access(this_klass, CHECK_(nullHandle));
3628 3628
3629 3629 // check if this class can access its superinterfaces
3630 3630 check_super_interface_access(this_klass, CHECK_(nullHandle));
3631 3631
3632 3632 // check if this class overrides any final method
3633 3633 check_final_method_override(this_klass, CHECK_(nullHandle));
3634 3634
3635 3635 // check that if this class is an interface then it doesn't have static methods
3636 3636 if (this_klass->is_interface()) {
3637 3637 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3638 3638 }
3639 3639
3640 3640 // Allocate mirror and initialize static fields
3641 3641 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3642 3642
3643 3643 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3644 3644 false /* not shared class */);
3645 3645
3646 3646 if (TraceClassLoading) {
3647 3647 // print in a single call to reduce interleaving of output
3648 3648 if (cfs->source() != NULL) {
3649 3649 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3650 3650 cfs->source());
3651 3651 } else if (class_loader.is_null()) {
3652 3652 if (THREAD->is_Java_thread()) {
3653 3653 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3654 3654 tty->print("[Loaded %s by instance of %s]\n",
3655 3655 this_klass->external_name(),
3656 3656 instanceKlass::cast(caller)->external_name());
3657 3657 } else {
3658 3658 tty->print("[Loaded %s]\n", this_klass->external_name());
3659 3659 }
3660 3660 } else {
3661 3661 ResourceMark rm;
3662 3662 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3663 3663 instanceKlass::cast(class_loader->klass())->external_name());
3664 3664 }
3665 3665 }
3666 3666
3667 3667 if (TraceClassResolution) {
3668 3668 // print out the superclass.
3669 3669 const char * from = Klass::cast(this_klass())->external_name();
3670 3670 if (this_klass->java_super() != NULL) {
3671 3671 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3672 3672 }
3673 3673 // print out each of the interface classes referred to by this class.
3674 3674 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3675 3675 if (!local_interfaces.is_null()) {
3676 3676 int length = local_interfaces->length();
3677 3677 for (int i = 0; i < length; i++) {
3678 3678 klassOop k = klassOop(local_interfaces->obj_at(i));
3679 3679 instanceKlass* to_class = instanceKlass::cast(k);
3680 3680 const char * to = to_class->external_name();
3681 3681 tty->print("RESOLVE %s %s (interface)\n", from, to);
3682 3682 }
3683 3683 }
3684 3684 }
3685 3685
3686 3686 #ifndef PRODUCT
3687 3687 if( PrintCompactFieldsSavings ) {
3688 3688 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3689 3689 tty->print("[Saved %d of %d bytes in %s]\n",
3690 3690 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3691 3691 orig_nonstatic_field_size*heapOopSize,
3692 3692 this_klass->external_name());
3693 3693 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3694 3694 tty->print("[Wasted %d over %d bytes in %s]\n",
3695 3695 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3696 3696 orig_nonstatic_field_size*heapOopSize,
3697 3697 this_klass->external_name());
3698 3698 }
3699 3699 }
3700 3700 #endif
3701 3701
3702 3702 // preserve result across HandleMark
3703 3703 preserve_this_klass = this_klass();
3704 3704 }
3705 3705
3706 3706 // Create new handle outside HandleMark
3707 3707 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3708 3708 debug_only(this_klass->as_klassOop()->verify();)
3709 3709
3710 3710 return this_klass;
3711 3711 }
3712 3712
3713 3713
3714 3714 unsigned int
3715 3715 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3716 3716 unsigned int nonstatic_oop_map_count,
3717 3717 int first_nonstatic_oop_offset) {
3718 3718 unsigned int map_count =
3719 3719 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3720 3720 if (nonstatic_oop_map_count > 0) {
3721 3721 // We have oops to add to map
3722 3722 if (map_count == 0) {
3723 3723 map_count = nonstatic_oop_map_count;
3724 3724 } else {
3725 3725 // Check whether we should add a new map block or whether the last one can
3726 3726 // be extended
3727 3727 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3728 3728 OopMapBlock* const last_map = first_map + map_count - 1;
3729 3729
3730 3730 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3731 3731 if (next_offset == first_nonstatic_oop_offset) {
3732 3732 // There is no gap bettwen superklass's last oop field and first
3733 3733 // local oop field, merge maps.
3734 3734 nonstatic_oop_map_count -= 1;
3735 3735 } else {
3736 3736 // Superklass didn't end with a oop field, add extra maps
3737 3737 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3738 3738 }
3739 3739 map_count += nonstatic_oop_map_count;
3740 3740 }
3741 3741 }
3742 3742 return map_count;
3743 3743 }
3744 3744
3745 3745
3746 3746 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3747 3747 unsigned int nonstatic_oop_map_count,
3748 3748 int* nonstatic_oop_offsets,
3749 3749 unsigned int* nonstatic_oop_counts) {
3750 3750 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3751 3751 const instanceKlass* const super = k->superklass();
3752 3752 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3753 3753 if (super_count > 0) {
3754 3754 // Copy maps from superklass
3755 3755 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3756 3756 for (unsigned int i = 0; i < super_count; ++i) {
3757 3757 *this_oop_map++ = *super_oop_map++;
3758 3758 }
3759 3759 }
3760 3760
3761 3761 if (nonstatic_oop_map_count > 0) {
3762 3762 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3763 3763 // The counts differ because there is no gap between superklass's last oop
3764 3764 // field and the first local oop field. Extend the last oop map copied
3765 3765 // from the superklass instead of creating new one.
3766 3766 nonstatic_oop_map_count--;
3767 3767 nonstatic_oop_offsets++;
3768 3768 this_oop_map--;
3769 3769 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3770 3770 this_oop_map++;
3771 3771 }
3772 3772
3773 3773 // Add new map blocks, fill them
3774 3774 while (nonstatic_oop_map_count-- > 0) {
3775 3775 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3776 3776 this_oop_map->set_count(*nonstatic_oop_counts++);
3777 3777 this_oop_map++;
3778 3778 }
3779 3779 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3780 3780 this_oop_map, "sanity");
3781 3781 }
3782 3782 }
3783 3783
3784 3784
3785 3785 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3786 3786 klassOop super = k->super();
3787 3787
3788 3788 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3789 3789 // in which case we don't have to register objects as finalizable
3790 3790 if (!_has_empty_finalizer) {
3791 3791 if (_has_finalizer ||
3792 3792 (super != NULL && super->klass_part()->has_finalizer())) {
3793 3793 k->set_has_finalizer();
3794 3794 }
3795 3795 }
3796 3796
3797 3797 #ifdef ASSERT
3798 3798 bool f = false;
3799 3799 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3800 3800 vmSymbols::void_method_signature());
3801 3801 if (m != NULL && !m->is_empty_method()) {
3802 3802 f = true;
3803 3803 }
3804 3804 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3805 3805 #endif
3806 3806
3807 3807 // Check if this klass supports the java.lang.Cloneable interface
3808 3808 if (SystemDictionary::Cloneable_klass_loaded()) {
3809 3809 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3810 3810 k->set_is_cloneable();
3811 3811 }
3812 3812 }
3813 3813
3814 3814 // Check if this klass has a vanilla default constructor
3815 3815 if (super == NULL) {
3816 3816 // java.lang.Object has empty default constructor
3817 3817 k->set_has_vanilla_constructor();
3818 3818 } else {
3819 3819 if (Klass::cast(super)->has_vanilla_constructor() &&
3820 3820 _has_vanilla_constructor) {
3821 3821 k->set_has_vanilla_constructor();
3822 3822 }
3823 3823 #ifdef ASSERT
3824 3824 bool v = false;
3825 3825 if (Klass::cast(super)->has_vanilla_constructor()) {
3826 3826 methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3827 3827 ), vmSymbols::void_method_signature());
3828 3828 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3829 3829 v = true;
3830 3830 }
3831 3831 }
3832 3832 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3833 3833 #endif
3834 3834 }
3835 3835
3836 3836 // If it cannot be fast-path allocated, set a bit in the layout helper.
3837 3837 // See documentation of instanceKlass::can_be_fastpath_allocated().
3838 3838 assert(k->size_helper() > 0, "layout_helper is initialized");
3839 3839 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3840 3840 || k->is_abstract() || k->is_interface()
3841 3841 || (k->name() == vmSymbols::java_lang_Class()
3842 3842 && k->class_loader() == NULL)
3843 3843 || k->size_helper() >= FastAllocateSizeLimit) {
3844 3844 // Forbid fast-path allocation.
3845 3845 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3846 3846 k->set_layout_helper(lh);
3847 3847 }
3848 3848 }
3849 3849
3850 3850
3851 3851 // utility method for appending and array with check for duplicates
3852 3852
3853 3853 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3854 3854 // iterate over new interfaces
3855 3855 for (int i = 0; i < ifs->length(); i++) {
3856 3856 oop e = ifs->obj_at(i);
3857 3857 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3858 3858 // check for duplicates
3859 3859 bool duplicate = false;
3860 3860 for (int j = 0; j < index; j++) {
3861 3861 if (result->obj_at(j) == e) {
3862 3862 duplicate = true;
3863 3863 break;
3864 3864 }
3865 3865 }
3866 3866 // add new interface
3867 3867 if (!duplicate) {
3868 3868 result->obj_at_put(index++, e);
3869 3869 }
3870 3870 }
3871 3871 }
3872 3872
3873 3873 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3874 3874 // Compute maximum size for transitive interfaces
3875 3875 int max_transitive_size = 0;
3876 3876 int super_size = 0;
3877 3877 // Add superclass transitive interfaces size
3878 3878 if (super.not_null()) {
3879 3879 super_size = super->transitive_interfaces()->length();
3880 3880 max_transitive_size += super_size;
3881 3881 }
3882 3882 // Add local interfaces' super interfaces
3883 3883 int local_size = local_ifs->length();
3884 3884 for (int i = 0; i < local_size; i++) {
3885 3885 klassOop l = klassOop(local_ifs->obj_at(i));
3886 3886 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3887 3887 }
3888 3888 // Finally add local interfaces
3889 3889 max_transitive_size += local_size;
3890 3890 // Construct array
3891 3891 objArrayHandle result;
3892 3892 if (max_transitive_size == 0) {
3893 3893 // no interfaces, use canonicalized array
3894 3894 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3895 3895 } else if (max_transitive_size == super_size) {
3896 3896 // no new local interfaces added, share superklass' transitive interface array
3897 3897 result = objArrayHandle(THREAD, super->transitive_interfaces());
3898 3898 } else if (max_transitive_size == local_size) {
3899 3899 // only local interfaces added, share local interface array
3900 3900 result = local_ifs;
3901 3901 } else {
3902 3902 objArrayHandle nullHandle;
3903 3903 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3904 3904 result = objArrayHandle(THREAD, new_objarray);
3905 3905 int index = 0;
3906 3906 // Copy down from superclass
3907 3907 if (super.not_null()) {
3908 3908 append_interfaces(result, index, super->transitive_interfaces());
3909 3909 }
3910 3910 // Copy down from local interfaces' superinterfaces
3911 3911 for (int i = 0; i < local_ifs->length(); i++) {
3912 3912 klassOop l = klassOop(local_ifs->obj_at(i));
3913 3913 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3914 3914 }
3915 3915 // Finally add local interfaces
3916 3916 append_interfaces(result, index, local_ifs());
3917 3917
3918 3918 // Check if duplicates were removed
3919 3919 if (index != max_transitive_size) {
3920 3920 assert(index < max_transitive_size, "just checking");
3921 3921 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3922 3922 for (int i = 0; i < index; i++) {
3923 3923 oop e = result->obj_at(i);
3924 3924 assert(e != NULL, "just checking");
3925 3925 new_result->obj_at_put(i, e);
3926 3926 }
3927 3927 result = objArrayHandle(THREAD, new_result);
3928 3928 }
3929 3929 }
3930 3930 return result;
3931 3931 }
3932 3932
3933 3933
3934 3934 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3935 3935 klassOop super = this_klass->super();
3936 3936 if ((super != NULL) &&
3937 3937 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3938 3938 ResourceMark rm(THREAD);
3939 3939 Exceptions::fthrow(
3940 3940 THREAD_AND_LOCATION,
3941 3941 vmSymbols::java_lang_IllegalAccessError(),
3942 3942 "class %s cannot access its superclass %s",
3943 3943 this_klass->external_name(),
3944 3944 instanceKlass::cast(super)->external_name()
3945 3945 );
3946 3946 return;
3947 3947 }
3948 3948 }
3949 3949
3950 3950
3951 3951 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
3952 3952 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
3953 3953 int lng = local_interfaces->length();
3954 3954 for (int i = lng - 1; i >= 0; i--) {
3955 3955 klassOop k = klassOop(local_interfaces->obj_at(i));
3956 3956 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
3957 3957 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
3958 3958 ResourceMark rm(THREAD);
3959 3959 Exceptions::fthrow(
3960 3960 THREAD_AND_LOCATION,
3961 3961 vmSymbols::java_lang_IllegalAccessError(),
3962 3962 "class %s cannot access its superinterface %s",
3963 3963 this_klass->external_name(),
3964 3964 instanceKlass::cast(k)->external_name()
3965 3965 );
3966 3966 return;
3967 3967 }
3968 3968 }
3969 3969 }
3970 3970
3971 3971
3972 3972 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
3973 3973 objArrayHandle methods (THREAD, this_klass->methods());
3974 3974 int num_methods = methods->length();
3975 3975
3976 3976 // go thru each method and check if it overrides a final method
3977 3977 for (int index = 0; index < num_methods; index++) {
3978 3978 methodOop m = (methodOop)methods->obj_at(index);
3979 3979
3980 3980 // skip private, static and <init> methods
3981 3981 if ((!m->is_private()) &&
3982 3982 (!m->is_static()) &&
3983 3983 (m->name() != vmSymbols::object_initializer_name())) {
3984 3984
3985 3985 Symbol* name = m->name();
3986 3986 Symbol* signature = m->signature();
3987 3987 klassOop k = this_klass->super();
3988 3988 methodOop super_m = NULL;
3989 3989 while (k != NULL) {
3990 3990 // skip supers that don't have final methods.
3991 3991 if (k->klass_part()->has_final_method()) {
3992 3992 // lookup a matching method in the super class hierarchy
3993 3993 super_m = instanceKlass::cast(k)->lookup_method(name, signature);
3994 3994 if (super_m == NULL) {
3995 3995 break; // didn't find any match; get out
3996 3996 }
3997 3997
3998 3998 if (super_m->is_final() &&
3999 3999 // matching method in super is final
4000 4000 (Reflection::verify_field_access(this_klass->as_klassOop(),
4001 4001 super_m->method_holder(),
4002 4002 super_m->method_holder(),
4003 4003 super_m->access_flags(), false))
4004 4004 // this class can access super final method and therefore override
4005 4005 ) {
4006 4006 ResourceMark rm(THREAD);
4007 4007 Exceptions::fthrow(
4008 4008 THREAD_AND_LOCATION,
4009 4009 vmSymbols::java_lang_VerifyError(),
4010 4010 "class %s overrides final method %s.%s",
4011 4011 this_klass->external_name(),
4012 4012 name->as_C_string(),
4013 4013 signature->as_C_string()
4014 4014 );
4015 4015 return;
4016 4016 }
4017 4017
4018 4018 // continue to look from super_m's holder's super.
4019 4019 k = instanceKlass::cast(super_m->method_holder())->super();
4020 4020 continue;
4021 4021 }
4022 4022
4023 4023 k = k->klass_part()->super();
4024 4024 }
4025 4025 }
4026 4026 }
4027 4027 }
4028 4028
4029 4029
4030 4030 // assumes that this_klass is an interface
4031 4031 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4032 4032 assert(this_klass->is_interface(), "not an interface");
4033 4033 objArrayHandle methods (THREAD, this_klass->methods());
4034 4034 int num_methods = methods->length();
4035 4035
4036 4036 for (int index = 0; index < num_methods; index++) {
4037 4037 methodOop m = (methodOop)methods->obj_at(index);
4038 4038 // if m is static and not the init method, throw a verify error
4039 4039 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4040 4040 ResourceMark rm(THREAD);
4041 4041 Exceptions::fthrow(
4042 4042 THREAD_AND_LOCATION,
4043 4043 vmSymbols::java_lang_VerifyError(),
4044 4044 "Illegal static method %s in interface %s",
4045 4045 m->name()->as_C_string(),
4046 4046 this_klass->external_name()
4047 4047 );
4048 4048 return;
4049 4049 }
4050 4050 }
4051 4051 }
4052 4052
4053 4053 // utility methods for format checking
4054 4054
4055 4055 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4056 4056 if (!_need_verify) { return; }
4057 4057
4058 4058 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4059 4059 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4060 4060 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4061 4061 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4062 4062 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4063 4063 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4064 4064 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4065 4065
4066 4066 if ((is_abstract && is_final) ||
4067 4067 (is_interface && !is_abstract) ||
4068 4068 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4069 4069 (!is_interface && major_gte_15 && is_annotation)) {
4070 4070 ResourceMark rm(THREAD);
4071 4071 Exceptions::fthrow(
4072 4072 THREAD_AND_LOCATION,
4073 4073 vmSymbols::java_lang_ClassFormatError(),
4074 4074 "Illegal class modifiers in class %s: 0x%X",
4075 4075 _class_name->as_C_string(), flags
4076 4076 );
4077 4077 return;
4078 4078 }
4079 4079 }
4080 4080
4081 4081 bool ClassFileParser::has_illegal_visibility(jint flags) {
4082 4082 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4083 4083 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4084 4084 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4085 4085
4086 4086 return ((is_public && is_protected) ||
4087 4087 (is_public && is_private) ||
4088 4088 (is_protected && is_private));
4089 4089 }
4090 4090
4091 4091 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4092 4092 u2 max_version =
4093 4093 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4094 4094 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4095 4095 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4096 4096 (major <= max_version) &&
4097 4097 ((major != max_version) ||
4098 4098 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4099 4099 }
4100 4100
4101 4101 void ClassFileParser::verify_legal_field_modifiers(
4102 4102 jint flags, bool is_interface, TRAPS) {
4103 4103 if (!_need_verify) { return; }
4104 4104
4105 4105 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4106 4106 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4107 4107 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4108 4108 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4109 4109 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4110 4110 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4111 4111 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4112 4112 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4113 4113 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4114 4114
4115 4115 bool is_illegal = false;
4116 4116
4117 4117 if (is_interface) {
4118 4118 if (!is_public || !is_static || !is_final || is_private ||
4119 4119 is_protected || is_volatile || is_transient ||
4120 4120 (major_gte_15 && is_enum)) {
4121 4121 is_illegal = true;
4122 4122 }
4123 4123 } else { // not interface
4124 4124 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4125 4125 is_illegal = true;
4126 4126 }
4127 4127 }
4128 4128
4129 4129 if (is_illegal) {
4130 4130 ResourceMark rm(THREAD);
4131 4131 Exceptions::fthrow(
4132 4132 THREAD_AND_LOCATION,
4133 4133 vmSymbols::java_lang_ClassFormatError(),
4134 4134 "Illegal field modifiers in class %s: 0x%X",
4135 4135 _class_name->as_C_string(), flags);
4136 4136 return;
4137 4137 }
4138 4138 }
4139 4139
4140 4140 void ClassFileParser::verify_legal_method_modifiers(
4141 4141 jint flags, bool is_interface, Symbol* name, TRAPS) {
4142 4142 if (!_need_verify) { return; }
4143 4143
4144 4144 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4145 4145 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4146 4146 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4147 4147 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4148 4148 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4149 4149 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4150 4150 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4151 4151 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4152 4152 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4153 4153 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4154 4154 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4155 4155
4156 4156 bool is_illegal = false;
4157 4157
4158 4158 if (is_interface) {
4159 4159 if (!is_abstract || !is_public || is_static || is_final ||
4160 4160 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4161 4161 is_illegal = true;
4162 4162 }
4163 4163 } else { // not interface
4164 4164 if (is_initializer) {
4165 4165 if (is_static || is_final || is_synchronized || is_native ||
4166 4166 is_abstract || (major_gte_15 && is_bridge)) {
4167 4167 is_illegal = true;
4168 4168 }
4169 4169 } else { // not initializer
4170 4170 if (is_abstract) {
4171 4171 if ((is_final || is_native || is_private || is_static ||
4172 4172 (major_gte_15 && (is_synchronized || is_strict)))) {
4173 4173 is_illegal = true;
4174 4174 }
4175 4175 }
4176 4176 if (has_illegal_visibility(flags)) {
4177 4177 is_illegal = true;
4178 4178 }
4179 4179 }
4180 4180 }
4181 4181
4182 4182 if (is_illegal) {
4183 4183 ResourceMark rm(THREAD);
4184 4184 Exceptions::fthrow(
4185 4185 THREAD_AND_LOCATION,
4186 4186 vmSymbols::java_lang_ClassFormatError(),
4187 4187 "Method %s in class %s has illegal modifiers: 0x%X",
4188 4188 name->as_C_string(), _class_name->as_C_string(), flags);
4189 4189 return;
4190 4190 }
4191 4191 }
4192 4192
4193 4193 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4194 4194 assert(_need_verify, "only called when _need_verify is true");
4195 4195 int i = 0;
4196 4196 int count = length >> 2;
4197 4197 for (int k=0; k<count; k++) {
4198 4198 unsigned char b0 = buffer[i];
4199 4199 unsigned char b1 = buffer[i+1];
4200 4200 unsigned char b2 = buffer[i+2];
4201 4201 unsigned char b3 = buffer[i+3];
4202 4202 // For an unsigned char v,
4203 4203 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4204 4204 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4205 4205 unsigned char res = b0 | b0 - 1 |
4206 4206 b1 | b1 - 1 |
4207 4207 b2 | b2 - 1 |
4208 4208 b3 | b3 - 1;
4209 4209 if (res >= 128) break;
4210 4210 i += 4;
4211 4211 }
4212 4212 for(; i < length; i++) {
4213 4213 unsigned short c;
4214 4214 // no embedded zeros
4215 4215 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4216 4216 if(buffer[i] < 128) {
4217 4217 continue;
4218 4218 }
4219 4219 if ((i + 5) < length) { // see if it's legal supplementary character
4220 4220 if (UTF8::is_supplementary_character(&buffer[i])) {
4221 4221 c = UTF8::get_supplementary_character(&buffer[i]);
4222 4222 i += 5;
4223 4223 continue;
4224 4224 }
4225 4225 }
4226 4226 switch (buffer[i] >> 4) {
4227 4227 default: break;
4228 4228 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4229 4229 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4230 4230 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4231 4231 c = (buffer[i] & 0x1F) << 6;
4232 4232 i++;
4233 4233 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4234 4234 c += buffer[i] & 0x3F;
4235 4235 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4236 4236 // for classes with major > 47, c must a null or a character in its shortest form
4237 4237 break;
4238 4238 }
4239 4239 }
4240 4240 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4241 4241 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4242 4242 c = (buffer[i] & 0xF) << 12;
4243 4243 i += 2;
4244 4244 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4245 4245 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4246 4246 if (_major_version <= 47 || c >= 0x800) {
4247 4247 // for classes with major > 47, c must be in its shortest form
4248 4248 break;
4249 4249 }
4250 4250 }
4251 4251 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4252 4252 } // end of switch
4253 4253 } // end of for
4254 4254 }
4255 4255
4256 4256 // Checks if name is a legal class name.
4257 4257 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4258 4258 if (!_need_verify || _relax_verify) { return; }
4259 4259
4260 4260 char buf[fixed_buffer_size];
4261 4261 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4262 4262 unsigned int length = name->utf8_length();
4263 4263 bool legal = false;
4264 4264
4265 4265 if (length > 0) {
4266 4266 char* p;
4267 4267 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4268 4268 p = skip_over_field_signature(bytes, false, length, CHECK);
4269 4269 legal = (p != NULL) && ((p - bytes) == (int)length);
4270 4270 } else if (_major_version < JAVA_1_5_VERSION) {
4271 4271 if (bytes[0] != '<') {
4272 4272 p = skip_over_field_name(bytes, true, length);
4273 4273 legal = (p != NULL) && ((p - bytes) == (int)length);
4274 4274 }
4275 4275 } else {
4276 4276 // 4900761: relax the constraints based on JSR202 spec
4277 4277 // Class names may be drawn from the entire Unicode character set.
4278 4278 // Identifiers between '/' must be unqualified names.
4279 4279 // The utf8 string has been verified when parsing cpool entries.
4280 4280 legal = verify_unqualified_name(bytes, length, LegalClass);
4281 4281 }
4282 4282 }
4283 4283 if (!legal) {
4284 4284 ResourceMark rm(THREAD);
4285 4285 Exceptions::fthrow(
4286 4286 THREAD_AND_LOCATION,
4287 4287 vmSymbols::java_lang_ClassFormatError(),
4288 4288 "Illegal class name \"%s\" in class file %s", bytes,
4289 4289 _class_name->as_C_string()
4290 4290 );
4291 4291 return;
4292 4292 }
4293 4293 }
4294 4294
4295 4295 // Checks if name is a legal field name.
4296 4296 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4297 4297 if (!_need_verify || _relax_verify) { return; }
4298 4298
4299 4299 char buf[fixed_buffer_size];
4300 4300 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4301 4301 unsigned int length = name->utf8_length();
4302 4302 bool legal = false;
4303 4303
4304 4304 if (length > 0) {
4305 4305 if (_major_version < JAVA_1_5_VERSION) {
4306 4306 if (bytes[0] != '<') {
4307 4307 char* p = skip_over_field_name(bytes, false, length);
4308 4308 legal = (p != NULL) && ((p - bytes) == (int)length);
4309 4309 }
4310 4310 } else {
4311 4311 // 4881221: relax the constraints based on JSR202 spec
4312 4312 legal = verify_unqualified_name(bytes, length, LegalField);
4313 4313 }
4314 4314 }
4315 4315
4316 4316 if (!legal) {
4317 4317 ResourceMark rm(THREAD);
4318 4318 Exceptions::fthrow(
4319 4319 THREAD_AND_LOCATION,
4320 4320 vmSymbols::java_lang_ClassFormatError(),
4321 4321 "Illegal field name \"%s\" in class %s", bytes,
4322 4322 _class_name->as_C_string()
4323 4323 );
4324 4324 return;
4325 4325 }
4326 4326 }
4327 4327
4328 4328 // Checks if name is a legal method name.
4329 4329 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4330 4330 if (!_need_verify || _relax_verify) { return; }
4331 4331
4332 4332 assert(name != NULL, "method name is null");
4333 4333 char buf[fixed_buffer_size];
4334 4334 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4335 4335 unsigned int length = name->utf8_length();
4336 4336 bool legal = false;
4337 4337
4338 4338 if (length > 0) {
4339 4339 if (bytes[0] == '<') {
4340 4340 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4341 4341 legal = true;
4342 4342 }
4343 4343 } else if (_major_version < JAVA_1_5_VERSION) {
4344 4344 char* p;
4345 4345 p = skip_over_field_name(bytes, false, length);
4346 4346 legal = (p != NULL) && ((p - bytes) == (int)length);
4347 4347 } else {
4348 4348 // 4881221: relax the constraints based on JSR202 spec
4349 4349 legal = verify_unqualified_name(bytes, length, LegalMethod);
4350 4350 }
4351 4351 }
4352 4352
4353 4353 if (!legal) {
4354 4354 ResourceMark rm(THREAD);
4355 4355 Exceptions::fthrow(
4356 4356 THREAD_AND_LOCATION,
4357 4357 vmSymbols::java_lang_ClassFormatError(),
4358 4358 "Illegal method name \"%s\" in class %s", bytes,
4359 4359 _class_name->as_C_string()
4360 4360 );
4361 4361 return;
4362 4362 }
4363 4363 }
4364 4364
4365 4365
4366 4366 // Checks if signature is a legal field signature.
4367 4367 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4368 4368 if (!_need_verify) { return; }
4369 4369
4370 4370 char buf[fixed_buffer_size];
4371 4371 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4372 4372 unsigned int length = signature->utf8_length();
4373 4373 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4374 4374
4375 4375 if (p == NULL || (p - bytes) != (int)length) {
4376 4376 throwIllegalSignature("Field", name, signature, CHECK);
4377 4377 }
4378 4378 }
4379 4379
4380 4380 // Checks if signature is a legal method signature.
4381 4381 // Returns number of parameters
4382 4382 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4383 4383 if (!_need_verify) {
4384 4384 // make sure caller's args_size will be less than 0 even for non-static
4385 4385 // method so it will be recomputed in compute_size_of_parameters().
4386 4386 return -2;
4387 4387 }
4388 4388
4389 4389 unsigned int args_size = 0;
4390 4390 char buf[fixed_buffer_size];
4391 4391 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4392 4392 unsigned int length = signature->utf8_length();
4393 4393 char* nextp;
4394 4394
4395 4395 // The first character must be a '('
4396 4396 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4397 4397 length--;
4398 4398 // Skip over legal field signatures
4399 4399 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4400 4400 while ((length > 0) && (nextp != NULL)) {
4401 4401 args_size++;
4402 4402 if (p[0] == 'J' || p[0] == 'D') {
4403 4403 args_size++;
4404 4404 }
4405 4405 length -= nextp - p;
4406 4406 p = nextp;
4407 4407 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4408 4408 }
4409 4409 // The first non-signature thing better be a ')'
4410 4410 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4411 4411 length--;
4412 4412 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4413 4413 // All internal methods must return void
4414 4414 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4415 4415 return args_size;
4416 4416 }
4417 4417 } else {
4418 4418 // Now we better just have a return value
4419 4419 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4420 4420 if (nextp && ((int)length == (nextp - p))) {
4421 4421 return args_size;
4422 4422 }
4423 4423 }
4424 4424 }
4425 4425 }
4426 4426 // Report error
4427 4427 throwIllegalSignature("Method", name, signature, CHECK_0);
4428 4428 return 0;
4429 4429 }
4430 4430
4431 4431
4432 4432 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4433 4433 // Method names also may not contain the characters '<' or '>', unless <init>
4434 4434 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4435 4435 // method. Because these names have been checked as special cases before
4436 4436 // calling this method in verify_legal_method_name.
4437 4437 bool ClassFileParser::verify_unqualified_name(
4438 4438 char* name, unsigned int length, int type) {
4439 4439 jchar ch;
4440 4440
4441 4441 for (char* p = name; p != name + length; ) {
4442 4442 ch = *p;
4443 4443 if (ch < 128) {
4444 4444 p++;
4445 4445 if (ch == '.' || ch == ';' || ch == '[' ) {
4446 4446 return false; // do not permit '.', ';', or '['
4447 4447 }
4448 4448 if (type != LegalClass && ch == '/') {
4449 4449 return false; // do not permit '/' unless it's class name
4450 4450 }
4451 4451 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4452 4452 return false; // do not permit '<' or '>' in method names
4453 4453 }
4454 4454 } else {
4455 4455 char* tmp_p = UTF8::next(p, &ch);
4456 4456 p = tmp_p;
4457 4457 }
4458 4458 }
4459 4459 return true;
4460 4460 }
4461 4461
4462 4462
4463 4463 // Take pointer to a string. Skip over the longest part of the string that could
4464 4464 // be taken as a fieldname. Allow '/' if slash_ok is true.
4465 4465 // Return a pointer to just past the fieldname.
4466 4466 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4467 4467 // being true, we saw consecutive slashes (meaning we were looking for a
4468 4468 // qualified path but found something that was badly-formed).
4469 4469 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4470 4470 char* p;
4471 4471 jchar ch;
4472 4472 jboolean last_is_slash = false;
4473 4473 jboolean not_first_ch = false;
4474 4474
4475 4475 for (p = name; p != name + length; not_first_ch = true) {
4476 4476 char* old_p = p;
4477 4477 ch = *p;
4478 4478 if (ch < 128) {
4479 4479 p++;
4480 4480 // quick check for ascii
4481 4481 if ((ch >= 'a' && ch <= 'z') ||
4482 4482 (ch >= 'A' && ch <= 'Z') ||
4483 4483 (ch == '_' || ch == '$') ||
4484 4484 (not_first_ch && ch >= '0' && ch <= '9')) {
4485 4485 last_is_slash = false;
4486 4486 continue;
4487 4487 }
4488 4488 if (slash_ok && ch == '/') {
4489 4489 if (last_is_slash) {
4490 4490 return NULL; // Don't permit consecutive slashes
4491 4491 }
4492 4492 last_is_slash = true;
4493 4493 continue;
4494 4494 }
4495 4495 } else {
4496 4496 jint unicode_ch;
4497 4497 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4498 4498 p = tmp_p;
4499 4499 last_is_slash = false;
4500 4500 // Check if ch is Java identifier start or is Java identifier part
4501 4501 // 4672820: call java.lang.Character methods directly without generating separate tables.
4502 4502 EXCEPTION_MARK;
4503 4503 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4504 4504
4505 4505 // return value
4506 4506 JavaValue result(T_BOOLEAN);
4507 4507 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4508 4508 JavaCallArguments args;
4509 4509 args.push_int(unicode_ch);
4510 4510
4511 4511 // public static boolean isJavaIdentifierStart(char ch);
4512 4512 JavaCalls::call_static(&result,
4513 4513 klass,
4514 4514 vmSymbols::isJavaIdentifierStart_name(),
4515 4515 vmSymbols::int_bool_signature(),
4516 4516 &args,
4517 4517 THREAD);
4518 4518
4519 4519 if (HAS_PENDING_EXCEPTION) {
4520 4520 CLEAR_PENDING_EXCEPTION;
4521 4521 return 0;
4522 4522 }
4523 4523 if (result.get_jboolean()) {
4524 4524 continue;
4525 4525 }
4526 4526
4527 4527 if (not_first_ch) {
4528 4528 // public static boolean isJavaIdentifierPart(char ch);
4529 4529 JavaCalls::call_static(&result,
4530 4530 klass,
4531 4531 vmSymbols::isJavaIdentifierPart_name(),
4532 4532 vmSymbols::int_bool_signature(),
4533 4533 &args,
4534 4534 THREAD);
4535 4535
4536 4536 if (HAS_PENDING_EXCEPTION) {
4537 4537 CLEAR_PENDING_EXCEPTION;
4538 4538 return 0;
4539 4539 }
4540 4540
4541 4541 if (result.get_jboolean()) {
4542 4542 continue;
4543 4543 }
4544 4544 }
4545 4545 }
4546 4546 return (not_first_ch) ? old_p : NULL;
4547 4547 }
4548 4548 return (not_first_ch) ? p : NULL;
4549 4549 }
4550 4550
4551 4551
4552 4552 // Take pointer to a string. Skip over the longest part of the string that could
4553 4553 // be taken as a field signature. Allow "void" if void_ok.
4554 4554 // Return a pointer to just past the signature.
4555 4555 // Return NULL if no legal signature is found.
4556 4556 char* ClassFileParser::skip_over_field_signature(char* signature,
4557 4557 bool void_ok,
4558 4558 unsigned int length,
4559 4559 TRAPS) {
4560 4560 unsigned int array_dim = 0;
4561 4561 while (length > 0) {
4562 4562 switch (signature[0]) {
4563 4563 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4564 4564 case JVM_SIGNATURE_BOOLEAN:
4565 4565 case JVM_SIGNATURE_BYTE:
4566 4566 case JVM_SIGNATURE_CHAR:
4567 4567 case JVM_SIGNATURE_SHORT:
4568 4568 case JVM_SIGNATURE_INT:
4569 4569 case JVM_SIGNATURE_FLOAT:
4570 4570 case JVM_SIGNATURE_LONG:
4571 4571 case JVM_SIGNATURE_DOUBLE:
4572 4572 return signature + 1;
4573 4573 case JVM_SIGNATURE_CLASS: {
4574 4574 if (_major_version < JAVA_1_5_VERSION) {
4575 4575 // Skip over the class name if one is there
4576 4576 char* p = skip_over_field_name(signature + 1, true, --length);
4577 4577
4578 4578 // The next character better be a semicolon
4579 4579 if (p && (p - signature) > 1 && p[0] == ';') {
4580 4580 return p + 1;
4581 4581 }
4582 4582 } else {
4583 4583 // 4900761: For class version > 48, any unicode is allowed in class name.
4584 4584 length--;
4585 4585 signature++;
4586 4586 while (length > 0 && signature[0] != ';') {
4587 4587 if (signature[0] == '.') {
4588 4588 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4589 4589 }
4590 4590 length--;
4591 4591 signature++;
4592 4592 }
4593 4593 if (signature[0] == ';') { return signature + 1; }
4594 4594 }
4595 4595
4596 4596 return NULL;
4597 4597 }
4598 4598 case JVM_SIGNATURE_ARRAY:
4599 4599 array_dim++;
4600 4600 if (array_dim > 255) {
4601 4601 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4602 4602 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4603 4603 }
4604 4604 // The rest of what's there better be a legal signature
4605 4605 signature++;
4606 4606 length--;
4607 4607 void_ok = false;
4608 4608 break;
4609 4609
4610 4610 default:
4611 4611 return NULL;
4612 4612 }
4613 4613 }
4614 4614 return NULL;
4615 4615 }
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