Mercurial > hg > truffle
comparison src/share/vm/oops/constantPoolOop.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | a45484ea312d |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_constantPoolOop.cpp.incl" | |
27 | |
28 klassOop constantPoolOopDesc::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { | |
29 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
30 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
31 // tag is not updated atomicly. | |
32 oop entry = *(this_oop->obj_at_addr(which)); | |
33 if (entry->is_klass()) { | |
34 // Already resolved - return entry. | |
35 return (klassOop)entry; | |
36 } | |
37 | |
38 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object | |
39 // already has updated the object | |
40 assert(THREAD->is_Java_thread(), "must be a Java thread"); | |
41 bool do_resolve = false; | |
42 bool in_error = false; | |
43 | |
44 symbolHandle name; | |
45 Handle loader; | |
46 { ObjectLocker ol(this_oop, THREAD); | |
47 | |
48 if (this_oop->tag_at(which).is_unresolved_klass()) { | |
49 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
50 in_error = true; | |
51 } else { | |
52 do_resolve = true; | |
53 name = symbolHandle(THREAD, this_oop->unresolved_klass_at(which)); | |
54 loader = Handle(THREAD, instanceKlass::cast(this_oop->pool_holder())->class_loader()); | |
55 } | |
56 } | |
57 } // unlocking constantPool | |
58 | |
59 | |
60 // The original attempt to resolve this constant pool entry failed so find the | |
61 // original error and throw it again (JVMS 5.4.3). | |
62 if (in_error) { | |
63 symbolOop error = SystemDictionary::find_resolution_error(this_oop, which); | |
64 guarantee(error != (symbolOop)NULL, "tag mismatch with resolution error table"); | |
65 ResourceMark rm; | |
66 // exception text will be the class name | |
67 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
68 THROW_MSG_0(error, className); | |
69 } | |
70 | |
71 if (do_resolve) { | |
72 // this_oop must be unlocked during resolve_or_fail | |
73 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
74 Handle h_prot (THREAD, protection_domain); | |
75 klassOop k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); | |
76 KlassHandle k; | |
77 if (!HAS_PENDING_EXCEPTION) { | |
78 k = KlassHandle(THREAD, k_oop); | |
79 // Do access check for klasses | |
80 verify_constant_pool_resolve(this_oop, k, THREAD); | |
81 } | |
82 | |
83 // Failed to resolve class. We must record the errors so that subsequent attempts | |
84 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). | |
85 if (HAS_PENDING_EXCEPTION) { | |
86 ResourceMark rm; | |
87 symbolHandle error(PENDING_EXCEPTION->klass()->klass_part()->name()); | |
88 | |
89 bool throw_orig_error = false; | |
90 { | |
91 ObjectLocker ol (this_oop, THREAD); | |
92 | |
93 // some other thread has beaten us and has resolved the class. | |
94 if (this_oop->tag_at(which).is_klass()) { | |
95 CLEAR_PENDING_EXCEPTION; | |
96 entry = this_oop->resolved_klass_at(which); | |
97 return (klassOop)entry; | |
98 } | |
99 | |
100 if (!PENDING_EXCEPTION-> | |
101 is_a(SystemDictionary::linkageError_klass())) { | |
102 // Just throw the exception and don't prevent these classes from | |
103 // being loaded due to virtual machine errors like StackOverflow | |
104 // and OutOfMemoryError, etc, or if the thread was hit by stop() | |
105 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) | |
106 } | |
107 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
108 SystemDictionary::add_resolution_error(this_oop, which, error); | |
109 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); | |
110 } else { | |
111 // some other thread has put the class in error state. | |
112 error = symbolHandle(SystemDictionary::find_resolution_error(this_oop, which)); | |
113 assert(!error.is_null(), "checking"); | |
114 throw_orig_error = true; | |
115 } | |
116 } // unlocked | |
117 | |
118 if (throw_orig_error) { | |
119 CLEAR_PENDING_EXCEPTION; | |
120 ResourceMark rm; | |
121 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
122 THROW_MSG_0(error, className); | |
123 } | |
124 | |
125 return 0; | |
126 } | |
127 | |
128 if (TraceClassResolution && !k()->klass_part()->oop_is_array()) { | |
129 // skip resolving the constant pool so that this code get's | |
130 // called the next time some bytecodes refer to this class. | |
131 ResourceMark rm; | |
132 int line_number = -1; | |
133 const char * source_file = NULL; | |
134 if (JavaThread::current()->has_last_Java_frame()) { | |
135 // try to identify the method which called this function. | |
136 vframeStream vfst(JavaThread::current()); | |
137 if (!vfst.at_end()) { | |
138 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
139 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); | |
140 if (s != NULL) { | |
141 source_file = s->as_C_string(); | |
142 } | |
143 } | |
144 } | |
145 if (k() != this_oop->pool_holder()) { | |
146 // only print something if the classes are different | |
147 if (source_file != NULL) { | |
148 tty->print("RESOLVE %s %s %s:%d\n", | |
149 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
150 instanceKlass::cast(k())->external_name(), source_file, line_number); | |
151 } else { | |
152 tty->print("RESOLVE %s %s\n", | |
153 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
154 instanceKlass::cast(k())->external_name()); | |
155 } | |
156 } | |
157 return k(); | |
158 } else { | |
159 ObjectLocker ol (this_oop, THREAD); | |
160 // Only updated constant pool - if it is resolved. | |
161 do_resolve = this_oop->tag_at(which).is_unresolved_klass(); | |
162 if (do_resolve) { | |
163 this_oop->klass_at_put(which, k()); | |
164 } | |
165 } | |
166 } | |
167 | |
168 entry = this_oop->resolved_klass_at(which); | |
169 assert(entry->is_klass(), "must be resolved at this point"); | |
170 return (klassOop)entry; | |
171 } | |
172 | |
173 | |
174 // Does not update constantPoolOop - to avoid any exception throwing. Used | |
175 // by compiler and exception handling. Also used to avoid classloads for | |
176 // instanceof operations. Returns NULL if the class has not been loaded or | |
177 // if the verification of constant pool failed | |
178 klassOop constantPoolOopDesc::klass_at_if_loaded(constantPoolHandle this_oop, int which) { | |
179 oop entry = *this_oop->obj_at_addr(which); | |
180 if (entry->is_klass()) { | |
181 return (klassOop)entry; | |
182 } else { | |
183 assert(entry->is_symbol(), "must be either symbol or klass"); | |
184 Thread *thread = Thread::current(); | |
185 symbolHandle name (thread, (symbolOop)entry); | |
186 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
187 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
188 Handle h_prot (thread, protection_domain); | |
189 Handle h_loader (thread, loader); | |
190 klassOop k = SystemDictionary::find(name, h_loader, h_prot, thread); | |
191 | |
192 if (k != NULL) { | |
193 // Make sure that resolving is legal | |
194 EXCEPTION_MARK; | |
195 KlassHandle klass(THREAD, k); | |
196 // return NULL if verification fails | |
197 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
198 if (HAS_PENDING_EXCEPTION) { | |
199 CLEAR_PENDING_EXCEPTION; | |
200 return NULL; | |
201 } | |
202 return klass(); | |
203 } else { | |
204 return k; | |
205 } | |
206 } | |
207 } | |
208 | |
209 | |
210 klassOop constantPoolOopDesc::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { | |
211 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); | |
212 } | |
213 | |
214 | |
215 // This is an interface for the compiler that allows accessing non-resolved entries | |
216 // in the constant pool - but still performs the validations tests. Must be used | |
217 // in a pre-parse of the compiler - to determine what it can do and not do. | |
218 // Note: We cannot update the ConstantPool from the vm_thread. | |
219 klassOop constantPoolOopDesc::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { | |
220 int which = this_oop->klass_ref_index_at(index); | |
221 oop entry = *this_oop->obj_at_addr(which); | |
222 if (entry->is_klass()) { | |
223 return (klassOop)entry; | |
224 } else { | |
225 assert(entry->is_symbol(), "must be either symbol or klass"); | |
226 symbolHandle name (THREAD, (symbolOop)entry); | |
227 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
228 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
229 Handle h_loader(THREAD, loader); | |
230 Handle h_prot (THREAD, protection_domain); | |
231 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
232 | |
233 // Do access check for klasses | |
234 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
235 return k(); | |
236 } | |
237 } | |
238 | |
239 | |
240 symbolOop constantPoolOopDesc::uncached_name_ref_at(int which) { | |
241 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); | |
242 int name_index = extract_low_short_from_int(ref_index); | |
243 return symbol_at(name_index); | |
244 } | |
245 | |
246 | |
247 symbolOop constantPoolOopDesc::uncached_signature_ref_at(int which) { | |
248 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); | |
249 int signature_index = extract_high_short_from_int(ref_index); | |
250 return symbol_at(signature_index); | |
251 } | |
252 | |
253 | |
254 int constantPoolOopDesc::uncached_name_and_type_ref_index_at(int which) { | |
255 jint ref_index = field_or_method_at(which, true); | |
256 return extract_high_short_from_int(ref_index); | |
257 } | |
258 | |
259 | |
260 int constantPoolOopDesc::uncached_klass_ref_index_at(int which) { | |
261 jint ref_index = field_or_method_at(which, true); | |
262 return extract_low_short_from_int(ref_index); | |
263 } | |
264 | |
265 | |
266 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { | |
267 if (k->oop_is_instance() || k->oop_is_objArray()) { | |
268 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
269 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); | |
270 KlassHandle element (THREAD, elem_oop); | |
271 | |
272 // The element type could be a typeArray - we only need the access check if it is | |
273 // an reference to another class | |
274 if (element->oop_is_instance()) { | |
275 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
276 } | |
277 } | |
278 } | |
279 | |
280 | |
281 int constantPoolOopDesc::klass_ref_index_at(int which) { | |
282 jint ref_index = field_or_method_at(which, false); | |
283 return extract_low_short_from_int(ref_index); | |
284 } | |
285 | |
286 | |
287 int constantPoolOopDesc::name_and_type_ref_index_at(int which) { | |
288 jint ref_index = field_or_method_at(which, false); | |
289 return extract_high_short_from_int(ref_index); | |
290 } | |
291 | |
292 | |
293 int constantPoolOopDesc::name_ref_index_at(int which) { | |
294 jint ref_index = name_and_type_at(which); | |
295 return extract_low_short_from_int(ref_index); | |
296 } | |
297 | |
298 | |
299 int constantPoolOopDesc::signature_ref_index_at(int which) { | |
300 jint ref_index = name_and_type_at(which); | |
301 return extract_high_short_from_int(ref_index); | |
302 } | |
303 | |
304 | |
305 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { | |
306 return klass_at(klass_ref_index_at(which), CHECK_NULL); | |
307 } | |
308 | |
309 | |
310 symbolOop constantPoolOopDesc::klass_name_at(int which) { | |
311 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), | |
312 "Corrupted constant pool"); | |
313 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
314 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
315 // tag is not updated atomicly. | |
316 oop entry = *(obj_at_addr(which)); | |
317 if (entry->is_klass()) { | |
318 // Already resolved - return entry's name. | |
319 return klassOop(entry)->klass_part()->name(); | |
320 } else { | |
321 assert(entry->is_symbol(), "must be either symbol or klass"); | |
322 return (symbolOop)entry; | |
323 } | |
324 } | |
325 | |
326 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) { | |
327 jint ref_index = klass_ref_index_at(which); | |
328 return klass_at_noresolve(ref_index); | |
329 } | |
330 | |
331 char* constantPoolOopDesc::string_at_noresolve(int which) { | |
332 // Test entry type in case string is resolved while in here. | |
333 oop entry = *(obj_at_addr(which)); | |
334 if (entry->is_symbol()) { | |
335 return ((symbolOop)entry)->as_C_string(); | |
336 } else { | |
337 return java_lang_String::as_utf8_string(entry); | |
338 } | |
339 } | |
340 | |
341 | |
342 symbolOop constantPoolOopDesc::name_ref_at(int which) { | |
343 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); | |
344 int name_index = extract_low_short_from_int(ref_index); | |
345 return symbol_at(name_index); | |
346 } | |
347 | |
348 | |
349 symbolOop constantPoolOopDesc::signature_ref_at(int which) { | |
350 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); | |
351 int signature_index = extract_high_short_from_int(ref_index); | |
352 return symbol_at(signature_index); | |
353 } | |
354 | |
355 | |
356 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { | |
357 return FieldType::basic_type(symbol_at(which)); | |
358 } | |
359 | |
360 | |
361 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { | |
362 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused | |
363 if (this_oop->tag_at(index).is_unresolved_string()) { | |
364 this_oop->string_at(index, CHECK); | |
365 } | |
366 } | |
367 } | |
368 | |
369 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { | |
370 oop entry = *(this_oop->obj_at_addr(which)); | |
371 if (entry->is_symbol()) { | |
372 ObjectLocker ol(this_oop, THREAD); | |
373 if (this_oop->tag_at(which).is_unresolved_string()) { | |
374 // Intern string | |
375 symbolOop sym = this_oop->unresolved_string_at(which); | |
376 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); | |
377 this_oop->string_at_put(which, entry); | |
378 } else { | |
379 // Another thread beat us and interned string, read string from constant pool | |
380 entry = this_oop->resolved_string_at(which); | |
381 } | |
382 } | |
383 assert(java_lang_String::is_instance(entry), "must be string"); | |
384 return entry; | |
385 } | |
386 | |
387 | |
388 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, | |
389 int which) { | |
390 // Names are interned, so we can compare symbolOops directly | |
391 symbolOop cp_name = klass_name_at(which); | |
392 return (cp_name == k->name()); | |
393 } | |
394 | |
395 | |
396 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { | |
397 ResourceMark rm; | |
398 int count = 0; | |
399 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused | |
400 if (tag_at(index).is_unresolved_string()) { | |
401 // Intern string | |
402 symbolOop sym = unresolved_string_at(index); | |
403 oop entry = StringTable::intern(sym, CHECK_(-1)); | |
404 string_at_put(index, entry); | |
405 } | |
406 } | |
407 return count; | |
408 } | |
409 | |
410 | |
411 // Iterate over symbols which are used as class, field, method names and | |
412 // signatures (in preparation for writing to the shared archive). | |
413 | |
414 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) { | |
415 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
416 switch (tag_at(index).value()) { | |
417 | |
418 case JVM_CONSTANT_UnresolvedClass: | |
419 closure->do_oop(obj_at_addr(index)); | |
420 break; | |
421 | |
422 case JVM_CONSTANT_NameAndType: | |
423 { | |
424 int i = *int_at_addr(index); | |
425 closure->do_oop(obj_at_addr((unsigned)i >> 16)); | |
426 closure->do_oop(obj_at_addr((unsigned)i & 0xffff)); | |
427 } | |
428 break; | |
429 | |
430 case JVM_CONSTANT_Class: | |
431 case JVM_CONSTANT_InterfaceMethodref: | |
432 case JVM_CONSTANT_Fieldref: | |
433 case JVM_CONSTANT_Methodref: | |
434 case JVM_CONSTANT_Integer: | |
435 case JVM_CONSTANT_Float: | |
436 // Do nothing! Not an oop. | |
437 // These constant types do not reference symbols at this point. | |
438 break; | |
439 | |
440 case JVM_CONSTANT_String: | |
441 // Do nothing! Not a symbol. | |
442 break; | |
443 | |
444 case JVM_CONSTANT_UnresolvedString: | |
445 case JVM_CONSTANT_Utf8: | |
446 // These constants are symbols, but unless these symbols are | |
447 // actually to be used for something, we don't want to mark them. | |
448 break; | |
449 | |
450 case JVM_CONSTANT_Long: | |
451 case JVM_CONSTANT_Double: | |
452 // Do nothing! Not an oop. (But takes two pool entries.) | |
453 ++index; | |
454 break; | |
455 | |
456 default: | |
457 ShouldNotReachHere(); | |
458 break; | |
459 } | |
460 } | |
461 } | |
462 | |
463 | |
464 // Iterate over the [one] tags array (in preparation for writing to the | |
465 // shared archive). | |
466 | |
467 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { | |
468 closure->do_oop(tags_addr()); | |
469 } | |
470 | |
471 | |
472 // Iterate over String objects (in preparation for writing to the shared | |
473 // archive). | |
474 | |
475 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { | |
476 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
477 switch (tag_at(index).value()) { | |
478 | |
479 case JVM_CONSTANT_UnresolvedClass: | |
480 case JVM_CONSTANT_NameAndType: | |
481 // Do nothing! Not a String. | |
482 break; | |
483 | |
484 case JVM_CONSTANT_Class: | |
485 case JVM_CONSTANT_InterfaceMethodref: | |
486 case JVM_CONSTANT_Fieldref: | |
487 case JVM_CONSTANT_Methodref: | |
488 case JVM_CONSTANT_Integer: | |
489 case JVM_CONSTANT_Float: | |
490 // Do nothing! Not an oop. | |
491 // These constant types do not reference symbols at this point. | |
492 break; | |
493 | |
494 case JVM_CONSTANT_String: | |
495 closure->do_oop(obj_at_addr(index)); | |
496 break; | |
497 | |
498 case JVM_CONSTANT_UnresolvedString: | |
499 case JVM_CONSTANT_Utf8: | |
500 // These constants are symbols, but unless these symbols are | |
501 // actually to be used for something, we don't want to mark them. | |
502 break; | |
503 | |
504 case JVM_CONSTANT_Long: | |
505 case JVM_CONSTANT_Double: | |
506 // Do nothing! Not an oop. (But takes two pool entries.) | |
507 ++index; | |
508 break; | |
509 | |
510 default: | |
511 ShouldNotReachHere(); | |
512 break; | |
513 } | |
514 } | |
515 } | |
516 | |
517 | |
518 // Compare this constant pool's entry at index1 to the constant pool | |
519 // cp2's entry at index2. | |
520 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, | |
521 int index2, TRAPS) { | |
522 | |
523 jbyte t1 = tag_at(index1).value(); | |
524 jbyte t2 = cp2->tag_at(index2).value(); | |
525 | |
526 | |
527 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
528 // when comparing | |
529 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
530 t1 = JVM_CONSTANT_UnresolvedClass; | |
531 } | |
532 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
533 t2 = JVM_CONSTANT_UnresolvedClass; | |
534 } | |
535 | |
536 if (t1 != t2) { | |
537 // Not the same entry type so there is nothing else to check. Note | |
538 // that this style of checking will consider resolved/unresolved | |
539 // class pairs and resolved/unresolved string pairs as different. | |
540 // From the constantPoolOop API point of view, this is correct | |
541 // behavior. See constantPoolKlass::merge() to see how this plays | |
542 // out in the context of constantPoolOop merging. | |
543 return false; | |
544 } | |
545 | |
546 switch (t1) { | |
547 case JVM_CONSTANT_Class: | |
548 { | |
549 klassOop k1 = klass_at(index1, CHECK_false); | |
550 klassOop k2 = cp2->klass_at(index2, CHECK_false); | |
551 if (k1 == k2) { | |
552 return true; | |
553 } | |
554 } break; | |
555 | |
556 case JVM_CONSTANT_ClassIndex: | |
557 { | |
558 int recur1 = klass_index_at(index1); | |
559 int recur2 = cp2->klass_index_at(index2); | |
560 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
561 if (match) { | |
562 return true; | |
563 } | |
564 } break; | |
565 | |
566 case JVM_CONSTANT_Double: | |
567 { | |
568 jdouble d1 = double_at(index1); | |
569 jdouble d2 = cp2->double_at(index2); | |
570 if (d1 == d2) { | |
571 return true; | |
572 } | |
573 } break; | |
574 | |
575 case JVM_CONSTANT_Fieldref: | |
576 case JVM_CONSTANT_InterfaceMethodref: | |
577 case JVM_CONSTANT_Methodref: | |
578 { | |
579 int recur1 = uncached_klass_ref_index_at(index1); | |
580 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
581 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
582 if (match) { | |
583 recur1 = uncached_name_and_type_ref_index_at(index1); | |
584 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
585 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
586 if (match) { | |
587 return true; | |
588 } | |
589 } | |
590 } break; | |
591 | |
592 case JVM_CONSTANT_Float: | |
593 { | |
594 jfloat f1 = float_at(index1); | |
595 jfloat f2 = cp2->float_at(index2); | |
596 if (f1 == f2) { | |
597 return true; | |
598 } | |
599 } break; | |
600 | |
601 case JVM_CONSTANT_Integer: | |
602 { | |
603 jint i1 = int_at(index1); | |
604 jint i2 = cp2->int_at(index2); | |
605 if (i1 == i2) { | |
606 return true; | |
607 } | |
608 } break; | |
609 | |
610 case JVM_CONSTANT_Long: | |
611 { | |
612 jlong l1 = long_at(index1); | |
613 jlong l2 = cp2->long_at(index2); | |
614 if (l1 == l2) { | |
615 return true; | |
616 } | |
617 } break; | |
618 | |
619 case JVM_CONSTANT_NameAndType: | |
620 { | |
621 int recur1 = name_ref_index_at(index1); | |
622 int recur2 = cp2->name_ref_index_at(index2); | |
623 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
624 if (match) { | |
625 recur1 = signature_ref_index_at(index1); | |
626 recur2 = cp2->signature_ref_index_at(index2); | |
627 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
628 if (match) { | |
629 return true; | |
630 } | |
631 } | |
632 } break; | |
633 | |
634 case JVM_CONSTANT_String: | |
635 { | |
636 oop s1 = string_at(index1, CHECK_false); | |
637 oop s2 = cp2->string_at(index2, CHECK_false); | |
638 if (s1 == s2) { | |
639 return true; | |
640 } | |
641 } break; | |
642 | |
643 case JVM_CONSTANT_StringIndex: | |
644 { | |
645 int recur1 = string_index_at(index1); | |
646 int recur2 = cp2->string_index_at(index2); | |
647 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
648 if (match) { | |
649 return true; | |
650 } | |
651 } break; | |
652 | |
653 case JVM_CONSTANT_UnresolvedClass: | |
654 { | |
655 symbolOop k1 = unresolved_klass_at(index1); | |
656 symbolOop k2 = cp2->unresolved_klass_at(index2); | |
657 if (k1 == k2) { | |
658 return true; | |
659 } | |
660 } break; | |
661 | |
662 case JVM_CONSTANT_UnresolvedString: | |
663 { | |
664 symbolOop s1 = unresolved_string_at(index1); | |
665 symbolOop s2 = cp2->unresolved_string_at(index2); | |
666 if (s1 == s2) { | |
667 return true; | |
668 } | |
669 } break; | |
670 | |
671 case JVM_CONSTANT_Utf8: | |
672 { | |
673 symbolOop s1 = symbol_at(index1); | |
674 symbolOop s2 = cp2->symbol_at(index2); | |
675 if (s1 == s2) { | |
676 return true; | |
677 } | |
678 } break; | |
679 | |
680 // Invalid is used as the tag for the second constant pool entry | |
681 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
682 // not be seen by itself. | |
683 case JVM_CONSTANT_Invalid: // fall through | |
684 | |
685 default: | |
686 ShouldNotReachHere(); | |
687 break; | |
688 } | |
689 | |
690 return false; | |
691 } // end compare_entry_to() | |
692 | |
693 | |
694 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
695 // to the constant pool to_cp's entries starting at to_i. A total of | |
696 // (end_i - start_i) + 1 entries are copied. | |
697 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i, | |
698 constantPoolHandle to_cp, int to_i, TRAPS) { | |
699 | |
700 int dest_i = to_i; // leave original alone for debug purposes | |
701 | |
702 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { | |
703 copy_entry_to(src_i, to_cp, dest_i, CHECK); | |
704 | |
705 switch (tag_at(src_i).value()) { | |
706 case JVM_CONSTANT_Double: | |
707 case JVM_CONSTANT_Long: | |
708 // double and long take two constant pool entries | |
709 src_i += 2; | |
710 dest_i += 2; | |
711 break; | |
712 | |
713 default: | |
714 // all others take one constant pool entry | |
715 src_i++; | |
716 dest_i++; | |
717 break; | |
718 } | |
719 } | |
720 } // end copy_cp_to() | |
721 | |
722 | |
723 // Copy this constant pool's entry at from_i to the constant pool | |
724 // to_cp's entry at to_i. | |
725 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp, | |
726 int to_i, TRAPS) { | |
727 | |
728 switch (tag_at(from_i).value()) { | |
729 case JVM_CONSTANT_Class: | |
730 { | |
731 klassOop k = klass_at(from_i, CHECK); | |
732 to_cp->klass_at_put(to_i, k); | |
733 } break; | |
734 | |
735 case JVM_CONSTANT_ClassIndex: | |
736 { | |
737 jint ki = klass_index_at(from_i); | |
738 to_cp->klass_index_at_put(to_i, ki); | |
739 } break; | |
740 | |
741 case JVM_CONSTANT_Double: | |
742 { | |
743 jdouble d = double_at(from_i); | |
744 to_cp->double_at_put(to_i, d); | |
745 // double takes two constant pool entries so init second entry's tag | |
746 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
747 } break; | |
748 | |
749 case JVM_CONSTANT_Fieldref: | |
750 { | |
751 int class_index = uncached_klass_ref_index_at(from_i); | |
752 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
753 to_cp->field_at_put(to_i, class_index, name_and_type_index); | |
754 } break; | |
755 | |
756 case JVM_CONSTANT_Float: | |
757 { | |
758 jfloat f = float_at(from_i); | |
759 to_cp->float_at_put(to_i, f); | |
760 } break; | |
761 | |
762 case JVM_CONSTANT_Integer: | |
763 { | |
764 jint i = int_at(from_i); | |
765 to_cp->int_at_put(to_i, i); | |
766 } break; | |
767 | |
768 case JVM_CONSTANT_InterfaceMethodref: | |
769 { | |
770 int class_index = uncached_klass_ref_index_at(from_i); | |
771 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
772 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); | |
773 } break; | |
774 | |
775 case JVM_CONSTANT_Long: | |
776 { | |
777 jlong l = long_at(from_i); | |
778 to_cp->long_at_put(to_i, l); | |
779 // long takes two constant pool entries so init second entry's tag | |
780 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
781 } break; | |
782 | |
783 case JVM_CONSTANT_Methodref: | |
784 { | |
785 int class_index = uncached_klass_ref_index_at(from_i); | |
786 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
787 to_cp->method_at_put(to_i, class_index, name_and_type_index); | |
788 } break; | |
789 | |
790 case JVM_CONSTANT_NameAndType: | |
791 { | |
792 int name_ref_index = name_ref_index_at(from_i); | |
793 int signature_ref_index = signature_ref_index_at(from_i); | |
794 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); | |
795 } break; | |
796 | |
797 case JVM_CONSTANT_String: | |
798 { | |
799 oop s = string_at(from_i, CHECK); | |
800 to_cp->string_at_put(to_i, s); | |
801 } break; | |
802 | |
803 case JVM_CONSTANT_StringIndex: | |
804 { | |
805 jint si = string_index_at(from_i); | |
806 to_cp->string_index_at_put(to_i, si); | |
807 } break; | |
808 | |
809 case JVM_CONSTANT_UnresolvedClass: | |
810 { | |
811 symbolOop k = unresolved_klass_at(from_i); | |
812 to_cp->unresolved_klass_at_put(to_i, k); | |
813 } break; | |
814 | |
815 case JVM_CONSTANT_UnresolvedClassInError: | |
816 { | |
817 symbolOop k = unresolved_klass_at(from_i); | |
818 to_cp->unresolved_klass_at_put(to_i, k); | |
819 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
820 } break; | |
821 | |
822 | |
823 case JVM_CONSTANT_UnresolvedString: | |
824 { | |
825 symbolOop s = unresolved_string_at(from_i); | |
826 to_cp->unresolved_string_at_put(to_i, s); | |
827 } break; | |
828 | |
829 case JVM_CONSTANT_Utf8: | |
830 { | |
831 symbolOop s = symbol_at(from_i); | |
832 to_cp->symbol_at_put(to_i, s); | |
833 } break; | |
834 | |
835 // Invalid is used as the tag for the second constant pool entry | |
836 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
837 // not be seen by itself. | |
838 case JVM_CONSTANT_Invalid: // fall through | |
839 | |
840 default: | |
841 { | |
842 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb | |
843 ShouldNotReachHere(); | |
844 } break; | |
845 } | |
846 } // end copy_entry_to() | |
847 | |
848 | |
849 // Search constant pool search_cp for an entry that matches this | |
850 // constant pool's entry at pattern_i. Returns the index of a | |
851 // matching entry or zero (0) if there is no matching entry. | |
852 int constantPoolOopDesc::find_matching_entry(int pattern_i, | |
853 constantPoolHandle search_cp, TRAPS) { | |
854 | |
855 // index zero (0) is not used | |
856 for (int i = 1; i < search_cp->length(); i++) { | |
857 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
858 if (found) { | |
859 return i; | |
860 } | |
861 } | |
862 | |
863 return 0; // entry not found; return unused index zero (0) | |
864 } // end find_matching_entry() | |
865 | |
866 | |
867 #ifndef PRODUCT | |
868 | |
869 const char* constantPoolOopDesc::printable_name_at(int which) { | |
870 | |
871 constantTag tag = tag_at(which); | |
872 | |
873 if (tag.is_unresolved_string() || tag.is_string()) { | |
874 return string_at_noresolve(which); | |
875 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
876 return klass_name_at(which)->as_C_string(); | |
877 } else if (tag.is_symbol()) { | |
878 return symbol_at(which)->as_C_string(); | |
879 } | |
880 return ""; | |
881 } | |
882 | |
883 #endif // PRODUCT | |
884 | |
885 | |
886 // JVMTI GetConstantPool support | |
887 | |
888 // For temporary use until code is stable. | |
889 #define DBG(code) | |
890 | |
891 static const char* WARN_MSG = "Must not be such entry!"; | |
892 | |
893 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
894 jint size = 0; | |
895 u2 idx1, idx2; | |
896 | |
897 for (jint idx = 1; idx < cnt; idx++) { | |
898 jint ent_size = 0; | |
899 u1 tag = *bytes++; | |
900 size++; // count tag | |
901 | |
902 printf("const #%03d, tag: %02d ", idx, tag); | |
903 switch(tag) { | |
904 case JVM_CONSTANT_Invalid: { | |
905 printf("Invalid"); | |
906 break; | |
907 } | |
908 case JVM_CONSTANT_Unicode: { | |
909 printf("Unicode %s", WARN_MSG); | |
910 break; | |
911 } | |
912 case JVM_CONSTANT_Utf8: { | |
913 u2 len = Bytes::get_Java_u2(bytes); | |
914 char str[128]; | |
915 if (len > 127) { | |
916 len = 127; | |
917 } | |
918 strncpy(str, (char *) (bytes+2), len); | |
919 str[len] = '\0'; | |
920 printf("Utf8 \"%s\"", str); | |
921 ent_size = 2 + len; | |
922 break; | |
923 } | |
924 case JVM_CONSTANT_Integer: { | |
925 u4 val = Bytes::get_Java_u4(bytes); | |
926 printf("int %d", *(int *) &val); | |
927 ent_size = 4; | |
928 break; | |
929 } | |
930 case JVM_CONSTANT_Float: { | |
931 u4 val = Bytes::get_Java_u4(bytes); | |
932 printf("float %5.3ff", *(float *) &val); | |
933 ent_size = 4; | |
934 break; | |
935 } | |
936 case JVM_CONSTANT_Long: { | |
937 u8 val = Bytes::get_Java_u8(bytes); | |
938 printf("long %lldl", *(jlong *) &val); | |
939 ent_size = 8; | |
940 idx++; // Long takes two cpool slots | |
941 break; | |
942 } | |
943 case JVM_CONSTANT_Double: { | |
944 u8 val = Bytes::get_Java_u8(bytes); | |
945 printf("double %5.3fd", *(jdouble *)&val); | |
946 ent_size = 8; | |
947 idx++; // Double takes two cpool slots | |
948 break; | |
949 } | |
950 case JVM_CONSTANT_Class: { | |
951 idx1 = Bytes::get_Java_u2(bytes); | |
952 printf("class #%03d", idx1); | |
953 ent_size = 2; | |
954 break; | |
955 } | |
956 case JVM_CONSTANT_String: { | |
957 idx1 = Bytes::get_Java_u2(bytes); | |
958 printf("String #%03d", idx1); | |
959 ent_size = 2; | |
960 break; | |
961 } | |
962 case JVM_CONSTANT_Fieldref: { | |
963 idx1 = Bytes::get_Java_u2(bytes); | |
964 idx2 = Bytes::get_Java_u2(bytes+2); | |
965 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
966 ent_size = 4; | |
967 break; | |
968 } | |
969 case JVM_CONSTANT_Methodref: { | |
970 idx1 = Bytes::get_Java_u2(bytes); | |
971 idx2 = Bytes::get_Java_u2(bytes+2); | |
972 printf("Method #%03d, #%03d", idx1, idx2); | |
973 ent_size = 4; | |
974 break; | |
975 } | |
976 case JVM_CONSTANT_InterfaceMethodref: { | |
977 idx1 = Bytes::get_Java_u2(bytes); | |
978 idx2 = Bytes::get_Java_u2(bytes+2); | |
979 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
980 ent_size = 4; | |
981 break; | |
982 } | |
983 case JVM_CONSTANT_NameAndType: { | |
984 idx1 = Bytes::get_Java_u2(bytes); | |
985 idx2 = Bytes::get_Java_u2(bytes+2); | |
986 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
987 ent_size = 4; | |
988 break; | |
989 } | |
990 case JVM_CONSTANT_ClassIndex: { | |
991 printf("ClassIndex %s", WARN_MSG); | |
992 break; | |
993 } | |
994 case JVM_CONSTANT_UnresolvedClass: { | |
995 printf("UnresolvedClass: %s", WARN_MSG); | |
996 break; | |
997 } | |
998 case JVM_CONSTANT_UnresolvedClassInError: { | |
999 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
1000 break; | |
1001 } | |
1002 case JVM_CONSTANT_StringIndex: { | |
1003 printf("StringIndex: %s", WARN_MSG); | |
1004 break; | |
1005 } | |
1006 case JVM_CONSTANT_UnresolvedString: { | |
1007 printf("UnresolvedString: %s", WARN_MSG); | |
1008 break; | |
1009 } | |
1010 } | |
1011 printf(";\n"); | |
1012 bytes += ent_size; | |
1013 size += ent_size; | |
1014 } | |
1015 printf("Cpool size: %d\n", size); | |
1016 fflush(0); | |
1017 return; | |
1018 } /* end print_cpool_bytes */ | |
1019 | |
1020 | |
1021 // Returns size of constant pool entry. | |
1022 jint constantPoolOopDesc::cpool_entry_size(jint idx) { | |
1023 switch(tag_at(idx).value()) { | |
1024 case JVM_CONSTANT_Invalid: | |
1025 case JVM_CONSTANT_Unicode: | |
1026 return 1; | |
1027 | |
1028 case JVM_CONSTANT_Utf8: | |
1029 return 3 + symbol_at(idx)->utf8_length(); | |
1030 | |
1031 case JVM_CONSTANT_Class: | |
1032 case JVM_CONSTANT_String: | |
1033 case JVM_CONSTANT_ClassIndex: | |
1034 case JVM_CONSTANT_UnresolvedClass: | |
1035 case JVM_CONSTANT_UnresolvedClassInError: | |
1036 case JVM_CONSTANT_StringIndex: | |
1037 case JVM_CONSTANT_UnresolvedString: | |
1038 return 3; | |
1039 | |
1040 case JVM_CONSTANT_Integer: | |
1041 case JVM_CONSTANT_Float: | |
1042 case JVM_CONSTANT_Fieldref: | |
1043 case JVM_CONSTANT_Methodref: | |
1044 case JVM_CONSTANT_InterfaceMethodref: | |
1045 case JVM_CONSTANT_NameAndType: | |
1046 return 5; | |
1047 | |
1048 case JVM_CONSTANT_Long: | |
1049 case JVM_CONSTANT_Double: | |
1050 return 9; | |
1051 } | |
1052 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
1053 return 1; | |
1054 } /* end cpool_entry_size */ | |
1055 | |
1056 | |
1057 // SymbolHashMap is used to find a constant pool index from a string. | |
1058 // This function fills in SymbolHashMaps, one for utf8s and one for | |
1059 // class names, returns size of the cpool raw bytes. | |
1060 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, | |
1061 SymbolHashMap *classmap) { | |
1062 jint size = 0; | |
1063 | |
1064 for (u2 idx = 1; idx < length(); idx++) { | |
1065 u2 tag = tag_at(idx).value(); | |
1066 size += cpool_entry_size(idx); | |
1067 | |
1068 switch(tag) { | |
1069 case JVM_CONSTANT_Utf8: { | |
1070 symbolOop sym = symbol_at(idx); | |
1071 symmap->add_entry(sym, idx); | |
1072 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
1073 break; | |
1074 } | |
1075 case JVM_CONSTANT_Class: | |
1076 case JVM_CONSTANT_UnresolvedClass: | |
1077 case JVM_CONSTANT_UnresolvedClassInError: { | |
1078 symbolOop sym = klass_name_at(idx); | |
1079 classmap->add_entry(sym, idx); | |
1080 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
1081 break; | |
1082 } | |
1083 case JVM_CONSTANT_Long: | |
1084 case JVM_CONSTANT_Double: { | |
1085 idx++; // Both Long and Double take two cpool slots | |
1086 break; | |
1087 } | |
1088 } | |
1089 } | |
1090 return size; | |
1091 } /* end hash_utf8_entries_to */ | |
1092 | |
1093 | |
1094 // Copy cpool bytes. | |
1095 // Returns: | |
1096 // 0, in case of OutOfMemoryError | |
1097 // -1, in case of internal error | |
1098 // > 0, count of the raw cpool bytes that have been copied | |
1099 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, | |
1100 SymbolHashMap* tbl, | |
1101 unsigned char *bytes) { | |
1102 u2 idx1, idx2; | |
1103 jint size = 0; | |
1104 jint cnt = length(); | |
1105 unsigned char *start_bytes = bytes; | |
1106 | |
1107 for (jint idx = 1; idx < cnt; idx++) { | |
1108 u1 tag = tag_at(idx).value(); | |
1109 jint ent_size = cpool_entry_size(idx); | |
1110 | |
1111 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
1112 | |
1113 *bytes = tag; | |
1114 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
1115 switch(tag) { | |
1116 case JVM_CONSTANT_Invalid: { | |
1117 DBG(printf("JVM_CONSTANT_Invalid")); | |
1118 break; | |
1119 } | |
1120 case JVM_CONSTANT_Unicode: { | |
1121 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
1122 DBG(printf("JVM_CONSTANT_Unicode")); | |
1123 break; | |
1124 } | |
1125 case JVM_CONSTANT_Utf8: { | |
1126 symbolOop sym = symbol_at(idx); | |
1127 char* str = sym->as_utf8(); | |
1128 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
1129 int len = (int) strlen(str); | |
1130 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
1131 for (int i = 0; i < len; i++) { | |
1132 bytes[3+i] = (u1) str[i]; | |
1133 } | |
1134 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
1135 break; | |
1136 } | |
1137 case JVM_CONSTANT_Integer: { | |
1138 jint val = int_at(idx); | |
1139 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1140 break; | |
1141 } | |
1142 case JVM_CONSTANT_Float: { | |
1143 jfloat val = float_at(idx); | |
1144 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1145 break; | |
1146 } | |
1147 case JVM_CONSTANT_Long: { | |
1148 jlong val = long_at(idx); | |
1149 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1150 idx++; // Long takes two cpool slots | |
1151 break; | |
1152 } | |
1153 case JVM_CONSTANT_Double: { | |
1154 jdouble val = double_at(idx); | |
1155 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1156 idx++; // Double takes two cpool slots | |
1157 break; | |
1158 } | |
1159 case JVM_CONSTANT_Class: | |
1160 case JVM_CONSTANT_UnresolvedClass: | |
1161 case JVM_CONSTANT_UnresolvedClassInError: { | |
1162 *bytes = JVM_CONSTANT_Class; | |
1163 symbolOop sym = klass_name_at(idx); | |
1164 idx1 = tbl->symbol_to_value(sym); | |
1165 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1166 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1167 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
1168 break; | |
1169 } | |
1170 case JVM_CONSTANT_String: { | |
1171 unsigned int hash; | |
1172 char *str = string_at_noresolve(idx); | |
1173 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); | |
1174 idx1 = tbl->symbol_to_value(sym); | |
1175 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1176 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1177 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); | |
1178 break; | |
1179 } | |
1180 case JVM_CONSTANT_UnresolvedString: { | |
1181 *bytes = JVM_CONSTANT_String; | |
1182 symbolOop sym = unresolved_string_at(idx); | |
1183 idx1 = tbl->symbol_to_value(sym); | |
1184 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1185 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1186 DBG(char *str = sym->as_utf8()); | |
1187 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); | |
1188 break; | |
1189 } | |
1190 case JVM_CONSTANT_Fieldref: | |
1191 case JVM_CONSTANT_Methodref: | |
1192 case JVM_CONSTANT_InterfaceMethodref: { | |
1193 idx1 = uncached_klass_ref_index_at(idx); | |
1194 idx2 = uncached_name_and_type_ref_index_at(idx); | |
1195 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1196 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1197 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
1198 break; | |
1199 } | |
1200 case JVM_CONSTANT_NameAndType: { | |
1201 idx1 = name_ref_index_at(idx); | |
1202 idx2 = signature_ref_index_at(idx); | |
1203 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1204 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1205 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
1206 break; | |
1207 } | |
1208 case JVM_CONSTANT_ClassIndex: { | |
1209 *bytes = JVM_CONSTANT_Class; | |
1210 idx1 = klass_index_at(idx); | |
1211 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1212 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
1213 break; | |
1214 } | |
1215 case JVM_CONSTANT_StringIndex: { | |
1216 *bytes = JVM_CONSTANT_String; | |
1217 idx1 = string_index_at(idx); | |
1218 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1219 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
1220 break; | |
1221 } | |
1222 } | |
1223 DBG(printf("\n")); | |
1224 bytes += ent_size; | |
1225 size += ent_size; | |
1226 } | |
1227 assert(size == cpool_size, "Size mismatch"); | |
1228 | |
1229 // Keep temorarily for debugging until it's stable. | |
1230 DBG(print_cpool_bytes(cnt, start_bytes)); | |
1231 return (int)(bytes - start_bytes); | |
1232 } /* end copy_cpool_bytes */ | |
1233 | |
1234 | |
1235 void SymbolHashMap::add_entry(symbolOop sym, u2 value) { | |
1236 char *str = sym->as_utf8(); | |
1237 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
1238 unsigned int index = hash % table_size(); | |
1239 | |
1240 // check if already in map | |
1241 // we prefer the first entry since it is more likely to be what was used in | |
1242 // the class file | |
1243 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
1244 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1245 if (en->hash() == hash && en->symbol() == sym) { | |
1246 return; // already there | |
1247 } | |
1248 } | |
1249 | |
1250 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
1251 entry->set_next(bucket(index)); | |
1252 _buckets[index].set_entry(entry); | |
1253 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1254 } | |
1255 | |
1256 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) { | |
1257 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); | |
1258 char *str = sym->as_utf8(); | |
1259 int len = sym->utf8_length(); | |
1260 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
1261 unsigned int index = hash % table_size(); | |
1262 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
1263 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1264 if (en->hash() == hash && en->symbol() == sym) { | |
1265 return en; | |
1266 } | |
1267 } | |
1268 return NULL; | |
1269 } |