Mercurial > hg > truffle
annotate src/share/vm/oops/constantPoolOop.cpp @ 487:80206b8a9128
6758234: if (k cond (a ? : b: c)) returns reversed answer if k is constant and b and c are longs
Reviewed-by: kvn, jrose
author | never |
---|---|
date | Fri, 12 Dec 2008 19:55:26 -0800 |
parents | a45484ea312d |
children | ad8c8ca4ab0f 2328d1d3f8cf |
rev | line source |
---|---|
0 | 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 | |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
28 void constantPoolOopDesc::set_flag_at(FlagBit fb) { |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
29 const int MAX_STATE_CHANGES = 2; |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
30 for (int i = MAX_STATE_CHANGES + 10; i > 0; i--) { |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
31 int oflags = _flags; |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
32 int nflags = oflags | (1 << (int)fb); |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
33 if (Atomic::cmpxchg(nflags, &_flags, oflags) == oflags) |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
34 return; |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
35 } |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
36 assert(false, "failed to cmpxchg flags"); |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
37 _flags |= (1 << (int)fb); // better than nothing |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
38 } |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
39 |
0 | 40 klassOop constantPoolOopDesc::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
41 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
42 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
43 // tag is not updated atomicly. | |
44 oop entry = *(this_oop->obj_at_addr(which)); | |
45 if (entry->is_klass()) { | |
46 // Already resolved - return entry. | |
47 return (klassOop)entry; | |
48 } | |
49 | |
50 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object | |
51 // already has updated the object | |
52 assert(THREAD->is_Java_thread(), "must be a Java thread"); | |
53 bool do_resolve = false; | |
54 bool in_error = false; | |
55 | |
56 symbolHandle name; | |
57 Handle loader; | |
58 { ObjectLocker ol(this_oop, THREAD); | |
59 | |
60 if (this_oop->tag_at(which).is_unresolved_klass()) { | |
61 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
62 in_error = true; | |
63 } else { | |
64 do_resolve = true; | |
65 name = symbolHandle(THREAD, this_oop->unresolved_klass_at(which)); | |
66 loader = Handle(THREAD, instanceKlass::cast(this_oop->pool_holder())->class_loader()); | |
67 } | |
68 } | |
69 } // unlocking constantPool | |
70 | |
71 | |
72 // The original attempt to resolve this constant pool entry failed so find the | |
73 // original error and throw it again (JVMS 5.4.3). | |
74 if (in_error) { | |
75 symbolOop error = SystemDictionary::find_resolution_error(this_oop, which); | |
76 guarantee(error != (symbolOop)NULL, "tag mismatch with resolution error table"); | |
77 ResourceMark rm; | |
78 // exception text will be the class name | |
79 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
80 THROW_MSG_0(error, className); | |
81 } | |
82 | |
83 if (do_resolve) { | |
84 // this_oop must be unlocked during resolve_or_fail | |
85 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
86 Handle h_prot (THREAD, protection_domain); | |
87 klassOop k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); | |
88 KlassHandle k; | |
89 if (!HAS_PENDING_EXCEPTION) { | |
90 k = KlassHandle(THREAD, k_oop); | |
91 // Do access check for klasses | |
92 verify_constant_pool_resolve(this_oop, k, THREAD); | |
93 } | |
94 | |
95 // Failed to resolve class. We must record the errors so that subsequent attempts | |
96 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). | |
97 if (HAS_PENDING_EXCEPTION) { | |
98 ResourceMark rm; | |
99 symbolHandle error(PENDING_EXCEPTION->klass()->klass_part()->name()); | |
100 | |
101 bool throw_orig_error = false; | |
102 { | |
103 ObjectLocker ol (this_oop, THREAD); | |
104 | |
105 // some other thread has beaten us and has resolved the class. | |
106 if (this_oop->tag_at(which).is_klass()) { | |
107 CLEAR_PENDING_EXCEPTION; | |
108 entry = this_oop->resolved_klass_at(which); | |
109 return (klassOop)entry; | |
110 } | |
111 | |
112 if (!PENDING_EXCEPTION-> | |
113 is_a(SystemDictionary::linkageError_klass())) { | |
114 // Just throw the exception and don't prevent these classes from | |
115 // being loaded due to virtual machine errors like StackOverflow | |
116 // and OutOfMemoryError, etc, or if the thread was hit by stop() | |
117 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) | |
118 } | |
119 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
120 SystemDictionary::add_resolution_error(this_oop, which, error); | |
121 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); | |
122 } else { | |
123 // some other thread has put the class in error state. | |
124 error = symbolHandle(SystemDictionary::find_resolution_error(this_oop, which)); | |
125 assert(!error.is_null(), "checking"); | |
126 throw_orig_error = true; | |
127 } | |
128 } // unlocked | |
129 | |
130 if (throw_orig_error) { | |
131 CLEAR_PENDING_EXCEPTION; | |
132 ResourceMark rm; | |
133 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
134 THROW_MSG_0(error, className); | |
135 } | |
136 | |
137 return 0; | |
138 } | |
139 | |
140 if (TraceClassResolution && !k()->klass_part()->oop_is_array()) { | |
141 // skip resolving the constant pool so that this code get's | |
142 // called the next time some bytecodes refer to this class. | |
143 ResourceMark rm; | |
144 int line_number = -1; | |
145 const char * source_file = NULL; | |
146 if (JavaThread::current()->has_last_Java_frame()) { | |
147 // try to identify the method which called this function. | |
148 vframeStream vfst(JavaThread::current()); | |
149 if (!vfst.at_end()) { | |
150 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
151 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); | |
152 if (s != NULL) { | |
153 source_file = s->as_C_string(); | |
154 } | |
155 } | |
156 } | |
157 if (k() != this_oop->pool_holder()) { | |
158 // only print something if the classes are different | |
159 if (source_file != NULL) { | |
160 tty->print("RESOLVE %s %s %s:%d\n", | |
161 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
162 instanceKlass::cast(k())->external_name(), source_file, line_number); | |
163 } else { | |
164 tty->print("RESOLVE %s %s\n", | |
165 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
166 instanceKlass::cast(k())->external_name()); | |
167 } | |
168 } | |
169 return k(); | |
170 } else { | |
171 ObjectLocker ol (this_oop, THREAD); | |
172 // Only updated constant pool - if it is resolved. | |
173 do_resolve = this_oop->tag_at(which).is_unresolved_klass(); | |
174 if (do_resolve) { | |
175 this_oop->klass_at_put(which, k()); | |
176 } | |
177 } | |
178 } | |
179 | |
180 entry = this_oop->resolved_klass_at(which); | |
181 assert(entry->is_klass(), "must be resolved at this point"); | |
182 return (klassOop)entry; | |
183 } | |
184 | |
185 | |
186 // Does not update constantPoolOop - to avoid any exception throwing. Used | |
187 // by compiler and exception handling. Also used to avoid classloads for | |
188 // instanceof operations. Returns NULL if the class has not been loaded or | |
189 // if the verification of constant pool failed | |
190 klassOop constantPoolOopDesc::klass_at_if_loaded(constantPoolHandle this_oop, int which) { | |
191 oop entry = *this_oop->obj_at_addr(which); | |
192 if (entry->is_klass()) { | |
193 return (klassOop)entry; | |
194 } else { | |
195 assert(entry->is_symbol(), "must be either symbol or klass"); | |
196 Thread *thread = Thread::current(); | |
197 symbolHandle name (thread, (symbolOop)entry); | |
198 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
199 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
200 Handle h_prot (thread, protection_domain); | |
201 Handle h_loader (thread, loader); | |
202 klassOop k = SystemDictionary::find(name, h_loader, h_prot, thread); | |
203 | |
204 if (k != NULL) { | |
205 // Make sure that resolving is legal | |
206 EXCEPTION_MARK; | |
207 KlassHandle klass(THREAD, k); | |
208 // return NULL if verification fails | |
209 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
210 if (HAS_PENDING_EXCEPTION) { | |
211 CLEAR_PENDING_EXCEPTION; | |
212 return NULL; | |
213 } | |
214 return klass(); | |
215 } else { | |
216 return k; | |
217 } | |
218 } | |
219 } | |
220 | |
221 | |
222 klassOop constantPoolOopDesc::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { | |
223 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); | |
224 } | |
225 | |
226 | |
227 // This is an interface for the compiler that allows accessing non-resolved entries | |
228 // in the constant pool - but still performs the validations tests. Must be used | |
229 // in a pre-parse of the compiler - to determine what it can do and not do. | |
230 // Note: We cannot update the ConstantPool from the vm_thread. | |
231 klassOop constantPoolOopDesc::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { | |
232 int which = this_oop->klass_ref_index_at(index); | |
233 oop entry = *this_oop->obj_at_addr(which); | |
234 if (entry->is_klass()) { | |
235 return (klassOop)entry; | |
236 } else { | |
237 assert(entry->is_symbol(), "must be either symbol or klass"); | |
238 symbolHandle name (THREAD, (symbolOop)entry); | |
239 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
240 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
241 Handle h_loader(THREAD, loader); | |
242 Handle h_prot (THREAD, protection_domain); | |
243 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
244 | |
245 // Do access check for klasses | |
246 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
247 return k(); | |
248 } | |
249 } | |
250 | |
251 | |
252 symbolOop constantPoolOopDesc::uncached_name_ref_at(int which) { | |
253 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); | |
254 int name_index = extract_low_short_from_int(ref_index); | |
255 return symbol_at(name_index); | |
256 } | |
257 | |
258 | |
259 symbolOop constantPoolOopDesc::uncached_signature_ref_at(int which) { | |
260 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); | |
261 int signature_index = extract_high_short_from_int(ref_index); | |
262 return symbol_at(signature_index); | |
263 } | |
264 | |
265 | |
266 int constantPoolOopDesc::uncached_name_and_type_ref_index_at(int which) { | |
267 jint ref_index = field_or_method_at(which, true); | |
268 return extract_high_short_from_int(ref_index); | |
269 } | |
270 | |
271 | |
272 int constantPoolOopDesc::uncached_klass_ref_index_at(int which) { | |
273 jint ref_index = field_or_method_at(which, true); | |
274 return extract_low_short_from_int(ref_index); | |
275 } | |
276 | |
277 | |
278 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { | |
279 if (k->oop_is_instance() || k->oop_is_objArray()) { | |
280 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
281 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); | |
282 KlassHandle element (THREAD, elem_oop); | |
283 | |
284 // The element type could be a typeArray - we only need the access check if it is | |
285 // an reference to another class | |
286 if (element->oop_is_instance()) { | |
287 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
288 } | |
289 } | |
290 } | |
291 | |
292 | |
293 int constantPoolOopDesc::klass_ref_index_at(int which) { | |
294 jint ref_index = field_or_method_at(which, false); | |
295 return extract_low_short_from_int(ref_index); | |
296 } | |
297 | |
298 | |
299 int constantPoolOopDesc::name_and_type_ref_index_at(int which) { | |
300 jint ref_index = field_or_method_at(which, false); | |
301 return extract_high_short_from_int(ref_index); | |
302 } | |
303 | |
304 | |
305 int constantPoolOopDesc::name_ref_index_at(int which) { | |
306 jint ref_index = name_and_type_at(which); | |
307 return extract_low_short_from_int(ref_index); | |
308 } | |
309 | |
310 | |
311 int constantPoolOopDesc::signature_ref_index_at(int which) { | |
312 jint ref_index = name_and_type_at(which); | |
313 return extract_high_short_from_int(ref_index); | |
314 } | |
315 | |
316 | |
317 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { | |
318 return klass_at(klass_ref_index_at(which), CHECK_NULL); | |
319 } | |
320 | |
321 | |
322 symbolOop constantPoolOopDesc::klass_name_at(int which) { | |
323 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), | |
324 "Corrupted constant pool"); | |
325 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
326 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
327 // tag is not updated atomicly. | |
328 oop entry = *(obj_at_addr(which)); | |
329 if (entry->is_klass()) { | |
330 // Already resolved - return entry's name. | |
331 return klassOop(entry)->klass_part()->name(); | |
332 } else { | |
333 assert(entry->is_symbol(), "must be either symbol or klass"); | |
334 return (symbolOop)entry; | |
335 } | |
336 } | |
337 | |
338 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) { | |
339 jint ref_index = klass_ref_index_at(which); | |
340 return klass_at_noresolve(ref_index); | |
341 } | |
342 | |
343 char* constantPoolOopDesc::string_at_noresolve(int which) { | |
344 // Test entry type in case string is resolved while in here. | |
345 oop entry = *(obj_at_addr(which)); | |
346 if (entry->is_symbol()) { | |
347 return ((symbolOop)entry)->as_C_string(); | |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
348 } else if (java_lang_String::is_instance(entry)) { |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
349 return java_lang_String::as_utf8_string(entry); |
0 | 350 } else { |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
351 return (char*)"<pseudo-string>"; |
0 | 352 } |
353 } | |
354 | |
355 | |
356 symbolOop constantPoolOopDesc::name_ref_at(int which) { | |
357 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); | |
358 int name_index = extract_low_short_from_int(ref_index); | |
359 return symbol_at(name_index); | |
360 } | |
361 | |
362 | |
363 symbolOop constantPoolOopDesc::signature_ref_at(int which) { | |
364 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); | |
365 int signature_index = extract_high_short_from_int(ref_index); | |
366 return symbol_at(signature_index); | |
367 } | |
368 | |
369 | |
370 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { | |
371 return FieldType::basic_type(symbol_at(which)); | |
372 } | |
373 | |
374 | |
375 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { | |
376 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused | |
377 if (this_oop->tag_at(index).is_unresolved_string()) { | |
378 this_oop->string_at(index, CHECK); | |
379 } | |
380 } | |
381 } | |
382 | |
383 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { | |
384 oop entry = *(this_oop->obj_at_addr(which)); | |
385 if (entry->is_symbol()) { | |
386 ObjectLocker ol(this_oop, THREAD); | |
387 if (this_oop->tag_at(which).is_unresolved_string()) { | |
388 // Intern string | |
389 symbolOop sym = this_oop->unresolved_string_at(which); | |
390 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); | |
391 this_oop->string_at_put(which, entry); | |
392 } else { | |
393 // Another thread beat us and interned string, read string from constant pool | |
394 entry = this_oop->resolved_string_at(which); | |
395 } | |
396 } | |
397 assert(java_lang_String::is_instance(entry), "must be string"); | |
398 return entry; | |
399 } | |
400 | |
401 | |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
402 bool constantPoolOopDesc::is_pseudo_string_at(int which) { |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
403 oop entry = *(obj_at_addr(which)); |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
404 if (entry->is_symbol()) |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
405 // Not yet resolved, but it will resolve to a string. |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
406 return false; |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
407 else if (java_lang_String::is_instance(entry)) |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
408 return false; // actually, it might be a non-interned or non-perm string |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
409 else |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
410 // truly pseudo |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
411 return true; |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
412 } |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
413 |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
414 |
0 | 415 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, |
416 int which) { | |
417 // Names are interned, so we can compare symbolOops directly | |
418 symbolOop cp_name = klass_name_at(which); | |
419 return (cp_name == k->name()); | |
420 } | |
421 | |
422 | |
423 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { | |
424 ResourceMark rm; | |
425 int count = 0; | |
426 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused | |
427 if (tag_at(index).is_unresolved_string()) { | |
428 // Intern string | |
429 symbolOop sym = unresolved_string_at(index); | |
430 oop entry = StringTable::intern(sym, CHECK_(-1)); | |
431 string_at_put(index, entry); | |
432 } | |
433 } | |
434 return count; | |
435 } | |
436 | |
437 | |
438 // Iterate over symbols which are used as class, field, method names and | |
439 // signatures (in preparation for writing to the shared archive). | |
440 | |
441 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) { | |
442 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
443 switch (tag_at(index).value()) { | |
444 | |
445 case JVM_CONSTANT_UnresolvedClass: | |
446 closure->do_oop(obj_at_addr(index)); | |
447 break; | |
448 | |
449 case JVM_CONSTANT_NameAndType: | |
450 { | |
451 int i = *int_at_addr(index); | |
452 closure->do_oop(obj_at_addr((unsigned)i >> 16)); | |
453 closure->do_oop(obj_at_addr((unsigned)i & 0xffff)); | |
454 } | |
455 break; | |
456 | |
457 case JVM_CONSTANT_Class: | |
458 case JVM_CONSTANT_InterfaceMethodref: | |
459 case JVM_CONSTANT_Fieldref: | |
460 case JVM_CONSTANT_Methodref: | |
461 case JVM_CONSTANT_Integer: | |
462 case JVM_CONSTANT_Float: | |
463 // Do nothing! Not an oop. | |
464 // These constant types do not reference symbols at this point. | |
465 break; | |
466 | |
467 case JVM_CONSTANT_String: | |
468 // Do nothing! Not a symbol. | |
469 break; | |
470 | |
471 case JVM_CONSTANT_UnresolvedString: | |
472 case JVM_CONSTANT_Utf8: | |
473 // These constants are symbols, but unless these symbols are | |
474 // actually to be used for something, we don't want to mark them. | |
475 break; | |
476 | |
477 case JVM_CONSTANT_Long: | |
478 case JVM_CONSTANT_Double: | |
479 // Do nothing! Not an oop. (But takes two pool entries.) | |
480 ++index; | |
481 break; | |
482 | |
483 default: | |
484 ShouldNotReachHere(); | |
485 break; | |
486 } | |
487 } | |
488 } | |
489 | |
490 | |
491 // Iterate over the [one] tags array (in preparation for writing to the | |
492 // shared archive). | |
493 | |
494 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { | |
495 closure->do_oop(tags_addr()); | |
496 } | |
497 | |
498 | |
499 // Iterate over String objects (in preparation for writing to the shared | |
500 // archive). | |
501 | |
502 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { | |
503 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
504 switch (tag_at(index).value()) { | |
505 | |
506 case JVM_CONSTANT_UnresolvedClass: | |
507 case JVM_CONSTANT_NameAndType: | |
508 // Do nothing! Not a String. | |
509 break; | |
510 | |
511 case JVM_CONSTANT_Class: | |
512 case JVM_CONSTANT_InterfaceMethodref: | |
513 case JVM_CONSTANT_Fieldref: | |
514 case JVM_CONSTANT_Methodref: | |
515 case JVM_CONSTANT_Integer: | |
516 case JVM_CONSTANT_Float: | |
517 // Do nothing! Not an oop. | |
518 // These constant types do not reference symbols at this point. | |
519 break; | |
520 | |
521 case JVM_CONSTANT_String: | |
522 closure->do_oop(obj_at_addr(index)); | |
523 break; | |
524 | |
525 case JVM_CONSTANT_UnresolvedString: | |
526 case JVM_CONSTANT_Utf8: | |
527 // These constants are symbols, but unless these symbols are | |
528 // actually to be used for something, we don't want to mark them. | |
529 break; | |
530 | |
531 case JVM_CONSTANT_Long: | |
532 case JVM_CONSTANT_Double: | |
533 // Do nothing! Not an oop. (But takes two pool entries.) | |
534 ++index; | |
535 break; | |
536 | |
537 default: | |
538 ShouldNotReachHere(); | |
539 break; | |
540 } | |
541 } | |
542 } | |
543 | |
544 | |
545 // Compare this constant pool's entry at index1 to the constant pool | |
546 // cp2's entry at index2. | |
547 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, | |
548 int index2, TRAPS) { | |
549 | |
550 jbyte t1 = tag_at(index1).value(); | |
551 jbyte t2 = cp2->tag_at(index2).value(); | |
552 | |
553 | |
554 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
555 // when comparing | |
556 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
557 t1 = JVM_CONSTANT_UnresolvedClass; | |
558 } | |
559 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
560 t2 = JVM_CONSTANT_UnresolvedClass; | |
561 } | |
562 | |
563 if (t1 != t2) { | |
564 // Not the same entry type so there is nothing else to check. Note | |
565 // that this style of checking will consider resolved/unresolved | |
566 // class pairs and resolved/unresolved string pairs as different. | |
567 // From the constantPoolOop API point of view, this is correct | |
568 // behavior. See constantPoolKlass::merge() to see how this plays | |
569 // out in the context of constantPoolOop merging. | |
570 return false; | |
571 } | |
572 | |
573 switch (t1) { | |
574 case JVM_CONSTANT_Class: | |
575 { | |
576 klassOop k1 = klass_at(index1, CHECK_false); | |
577 klassOop k2 = cp2->klass_at(index2, CHECK_false); | |
578 if (k1 == k2) { | |
579 return true; | |
580 } | |
581 } break; | |
582 | |
583 case JVM_CONSTANT_ClassIndex: | |
584 { | |
585 int recur1 = klass_index_at(index1); | |
586 int recur2 = cp2->klass_index_at(index2); | |
587 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
588 if (match) { | |
589 return true; | |
590 } | |
591 } break; | |
592 | |
593 case JVM_CONSTANT_Double: | |
594 { | |
595 jdouble d1 = double_at(index1); | |
596 jdouble d2 = cp2->double_at(index2); | |
597 if (d1 == d2) { | |
598 return true; | |
599 } | |
600 } break; | |
601 | |
602 case JVM_CONSTANT_Fieldref: | |
603 case JVM_CONSTANT_InterfaceMethodref: | |
604 case JVM_CONSTANT_Methodref: | |
605 { | |
606 int recur1 = uncached_klass_ref_index_at(index1); | |
607 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
608 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
609 if (match) { | |
610 recur1 = uncached_name_and_type_ref_index_at(index1); | |
611 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
612 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
613 if (match) { | |
614 return true; | |
615 } | |
616 } | |
617 } break; | |
618 | |
619 case JVM_CONSTANT_Float: | |
620 { | |
621 jfloat f1 = float_at(index1); | |
622 jfloat f2 = cp2->float_at(index2); | |
623 if (f1 == f2) { | |
624 return true; | |
625 } | |
626 } break; | |
627 | |
628 case JVM_CONSTANT_Integer: | |
629 { | |
630 jint i1 = int_at(index1); | |
631 jint i2 = cp2->int_at(index2); | |
632 if (i1 == i2) { | |
633 return true; | |
634 } | |
635 } break; | |
636 | |
637 case JVM_CONSTANT_Long: | |
638 { | |
639 jlong l1 = long_at(index1); | |
640 jlong l2 = cp2->long_at(index2); | |
641 if (l1 == l2) { | |
642 return true; | |
643 } | |
644 } break; | |
645 | |
646 case JVM_CONSTANT_NameAndType: | |
647 { | |
648 int recur1 = name_ref_index_at(index1); | |
649 int recur2 = cp2->name_ref_index_at(index2); | |
650 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
651 if (match) { | |
652 recur1 = signature_ref_index_at(index1); | |
653 recur2 = cp2->signature_ref_index_at(index2); | |
654 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
655 if (match) { | |
656 return true; | |
657 } | |
658 } | |
659 } break; | |
660 | |
661 case JVM_CONSTANT_String: | |
662 { | |
663 oop s1 = string_at(index1, CHECK_false); | |
664 oop s2 = cp2->string_at(index2, CHECK_false); | |
665 if (s1 == s2) { | |
666 return true; | |
667 } | |
668 } break; | |
669 | |
670 case JVM_CONSTANT_StringIndex: | |
671 { | |
672 int recur1 = string_index_at(index1); | |
673 int recur2 = cp2->string_index_at(index2); | |
674 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
675 if (match) { | |
676 return true; | |
677 } | |
678 } break; | |
679 | |
680 case JVM_CONSTANT_UnresolvedClass: | |
681 { | |
682 symbolOop k1 = unresolved_klass_at(index1); | |
683 symbolOop k2 = cp2->unresolved_klass_at(index2); | |
684 if (k1 == k2) { | |
685 return true; | |
686 } | |
687 } break; | |
688 | |
689 case JVM_CONSTANT_UnresolvedString: | |
690 { | |
691 symbolOop s1 = unresolved_string_at(index1); | |
692 symbolOop s2 = cp2->unresolved_string_at(index2); | |
693 if (s1 == s2) { | |
694 return true; | |
695 } | |
696 } break; | |
697 | |
698 case JVM_CONSTANT_Utf8: | |
699 { | |
700 symbolOop s1 = symbol_at(index1); | |
701 symbolOop s2 = cp2->symbol_at(index2); | |
702 if (s1 == s2) { | |
703 return true; | |
704 } | |
705 } break; | |
706 | |
707 // Invalid is used as the tag for the second constant pool entry | |
708 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
709 // not be seen by itself. | |
710 case JVM_CONSTANT_Invalid: // fall through | |
711 | |
712 default: | |
713 ShouldNotReachHere(); | |
714 break; | |
715 } | |
716 | |
717 return false; | |
718 } // end compare_entry_to() | |
719 | |
720 | |
721 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
722 // to the constant pool to_cp's entries starting at to_i. A total of | |
723 // (end_i - start_i) + 1 entries are copied. | |
724 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i, | |
725 constantPoolHandle to_cp, int to_i, TRAPS) { | |
726 | |
727 int dest_i = to_i; // leave original alone for debug purposes | |
728 | |
729 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { | |
730 copy_entry_to(src_i, to_cp, dest_i, CHECK); | |
731 | |
732 switch (tag_at(src_i).value()) { | |
733 case JVM_CONSTANT_Double: | |
734 case JVM_CONSTANT_Long: | |
735 // double and long take two constant pool entries | |
736 src_i += 2; | |
737 dest_i += 2; | |
738 break; | |
739 | |
740 default: | |
741 // all others take one constant pool entry | |
742 src_i++; | |
743 dest_i++; | |
744 break; | |
745 } | |
746 } | |
747 } // end copy_cp_to() | |
748 | |
749 | |
750 // Copy this constant pool's entry at from_i to the constant pool | |
751 // to_cp's entry at to_i. | |
752 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp, | |
753 int to_i, TRAPS) { | |
754 | |
755 switch (tag_at(from_i).value()) { | |
756 case JVM_CONSTANT_Class: | |
757 { | |
758 klassOop k = klass_at(from_i, CHECK); | |
759 to_cp->klass_at_put(to_i, k); | |
760 } break; | |
761 | |
762 case JVM_CONSTANT_ClassIndex: | |
763 { | |
764 jint ki = klass_index_at(from_i); | |
765 to_cp->klass_index_at_put(to_i, ki); | |
766 } break; | |
767 | |
768 case JVM_CONSTANT_Double: | |
769 { | |
770 jdouble d = double_at(from_i); | |
771 to_cp->double_at_put(to_i, d); | |
772 // double takes two constant pool entries so init second entry's tag | |
773 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
774 } break; | |
775 | |
776 case JVM_CONSTANT_Fieldref: | |
777 { | |
778 int class_index = uncached_klass_ref_index_at(from_i); | |
779 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
780 to_cp->field_at_put(to_i, class_index, name_and_type_index); | |
781 } break; | |
782 | |
783 case JVM_CONSTANT_Float: | |
784 { | |
785 jfloat f = float_at(from_i); | |
786 to_cp->float_at_put(to_i, f); | |
787 } break; | |
788 | |
789 case JVM_CONSTANT_Integer: | |
790 { | |
791 jint i = int_at(from_i); | |
792 to_cp->int_at_put(to_i, i); | |
793 } break; | |
794 | |
795 case JVM_CONSTANT_InterfaceMethodref: | |
796 { | |
797 int class_index = uncached_klass_ref_index_at(from_i); | |
798 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
799 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); | |
800 } break; | |
801 | |
802 case JVM_CONSTANT_Long: | |
803 { | |
804 jlong l = long_at(from_i); | |
805 to_cp->long_at_put(to_i, l); | |
806 // long takes two constant pool entries so init second entry's tag | |
807 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
808 } break; | |
809 | |
810 case JVM_CONSTANT_Methodref: | |
811 { | |
812 int class_index = uncached_klass_ref_index_at(from_i); | |
813 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
814 to_cp->method_at_put(to_i, class_index, name_and_type_index); | |
815 } break; | |
816 | |
817 case JVM_CONSTANT_NameAndType: | |
818 { | |
819 int name_ref_index = name_ref_index_at(from_i); | |
820 int signature_ref_index = signature_ref_index_at(from_i); | |
821 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); | |
822 } break; | |
823 | |
824 case JVM_CONSTANT_String: | |
825 { | |
826 oop s = string_at(from_i, CHECK); | |
827 to_cp->string_at_put(to_i, s); | |
828 } break; | |
829 | |
830 case JVM_CONSTANT_StringIndex: | |
831 { | |
832 jint si = string_index_at(from_i); | |
833 to_cp->string_index_at_put(to_i, si); | |
834 } break; | |
835 | |
836 case JVM_CONSTANT_UnresolvedClass: | |
837 { | |
838 symbolOop k = unresolved_klass_at(from_i); | |
839 to_cp->unresolved_klass_at_put(to_i, k); | |
840 } break; | |
841 | |
842 case JVM_CONSTANT_UnresolvedClassInError: | |
843 { | |
844 symbolOop k = unresolved_klass_at(from_i); | |
845 to_cp->unresolved_klass_at_put(to_i, k); | |
846 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
847 } break; | |
848 | |
849 | |
850 case JVM_CONSTANT_UnresolvedString: | |
851 { | |
852 symbolOop s = unresolved_string_at(from_i); | |
853 to_cp->unresolved_string_at_put(to_i, s); | |
854 } break; | |
855 | |
856 case JVM_CONSTANT_Utf8: | |
857 { | |
858 symbolOop s = symbol_at(from_i); | |
859 to_cp->symbol_at_put(to_i, s); | |
860 } break; | |
861 | |
862 // Invalid is used as the tag for the second constant pool entry | |
863 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
864 // not be seen by itself. | |
865 case JVM_CONSTANT_Invalid: // fall through | |
866 | |
867 default: | |
868 { | |
869 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb | |
870 ShouldNotReachHere(); | |
871 } break; | |
872 } | |
873 } // end copy_entry_to() | |
874 | |
875 | |
876 // Search constant pool search_cp for an entry that matches this | |
877 // constant pool's entry at pattern_i. Returns the index of a | |
878 // matching entry or zero (0) if there is no matching entry. | |
879 int constantPoolOopDesc::find_matching_entry(int pattern_i, | |
880 constantPoolHandle search_cp, TRAPS) { | |
881 | |
882 // index zero (0) is not used | |
883 for (int i = 1; i < search_cp->length(); i++) { | |
884 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
885 if (found) { | |
886 return i; | |
887 } | |
888 } | |
889 | |
890 return 0; // entry not found; return unused index zero (0) | |
891 } // end find_matching_entry() | |
892 | |
893 | |
894 #ifndef PRODUCT | |
895 | |
896 const char* constantPoolOopDesc::printable_name_at(int which) { | |
897 | |
898 constantTag tag = tag_at(which); | |
899 | |
900 if (tag.is_unresolved_string() || tag.is_string()) { | |
901 return string_at_noresolve(which); | |
902 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
903 return klass_name_at(which)->as_C_string(); | |
904 } else if (tag.is_symbol()) { | |
905 return symbol_at(which)->as_C_string(); | |
906 } | |
907 return ""; | |
908 } | |
909 | |
910 #endif // PRODUCT | |
911 | |
912 | |
913 // JVMTI GetConstantPool support | |
914 | |
915 // For temporary use until code is stable. | |
916 #define DBG(code) | |
917 | |
918 static const char* WARN_MSG = "Must not be such entry!"; | |
919 | |
920 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
921 jint size = 0; | |
922 u2 idx1, idx2; | |
923 | |
924 for (jint idx = 1; idx < cnt; idx++) { | |
925 jint ent_size = 0; | |
926 u1 tag = *bytes++; | |
927 size++; // count tag | |
928 | |
929 printf("const #%03d, tag: %02d ", idx, tag); | |
930 switch(tag) { | |
931 case JVM_CONSTANT_Invalid: { | |
932 printf("Invalid"); | |
933 break; | |
934 } | |
935 case JVM_CONSTANT_Unicode: { | |
936 printf("Unicode %s", WARN_MSG); | |
937 break; | |
938 } | |
939 case JVM_CONSTANT_Utf8: { | |
940 u2 len = Bytes::get_Java_u2(bytes); | |
941 char str[128]; | |
942 if (len > 127) { | |
943 len = 127; | |
944 } | |
945 strncpy(str, (char *) (bytes+2), len); | |
946 str[len] = '\0'; | |
947 printf("Utf8 \"%s\"", str); | |
948 ent_size = 2 + len; | |
949 break; | |
950 } | |
951 case JVM_CONSTANT_Integer: { | |
952 u4 val = Bytes::get_Java_u4(bytes); | |
953 printf("int %d", *(int *) &val); | |
954 ent_size = 4; | |
955 break; | |
956 } | |
957 case JVM_CONSTANT_Float: { | |
958 u4 val = Bytes::get_Java_u4(bytes); | |
959 printf("float %5.3ff", *(float *) &val); | |
960 ent_size = 4; | |
961 break; | |
962 } | |
963 case JVM_CONSTANT_Long: { | |
964 u8 val = Bytes::get_Java_u8(bytes); | |
965 printf("long %lldl", *(jlong *) &val); | |
966 ent_size = 8; | |
967 idx++; // Long takes two cpool slots | |
968 break; | |
969 } | |
970 case JVM_CONSTANT_Double: { | |
971 u8 val = Bytes::get_Java_u8(bytes); | |
972 printf("double %5.3fd", *(jdouble *)&val); | |
973 ent_size = 8; | |
974 idx++; // Double takes two cpool slots | |
975 break; | |
976 } | |
977 case JVM_CONSTANT_Class: { | |
978 idx1 = Bytes::get_Java_u2(bytes); | |
979 printf("class #%03d", idx1); | |
980 ent_size = 2; | |
981 break; | |
982 } | |
983 case JVM_CONSTANT_String: { | |
984 idx1 = Bytes::get_Java_u2(bytes); | |
985 printf("String #%03d", idx1); | |
986 ent_size = 2; | |
987 break; | |
988 } | |
989 case JVM_CONSTANT_Fieldref: { | |
990 idx1 = Bytes::get_Java_u2(bytes); | |
991 idx2 = Bytes::get_Java_u2(bytes+2); | |
992 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
993 ent_size = 4; | |
994 break; | |
995 } | |
996 case JVM_CONSTANT_Methodref: { | |
997 idx1 = Bytes::get_Java_u2(bytes); | |
998 idx2 = Bytes::get_Java_u2(bytes+2); | |
999 printf("Method #%03d, #%03d", idx1, idx2); | |
1000 ent_size = 4; | |
1001 break; | |
1002 } | |
1003 case JVM_CONSTANT_InterfaceMethodref: { | |
1004 idx1 = Bytes::get_Java_u2(bytes); | |
1005 idx2 = Bytes::get_Java_u2(bytes+2); | |
1006 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
1007 ent_size = 4; | |
1008 break; | |
1009 } | |
1010 case JVM_CONSTANT_NameAndType: { | |
1011 idx1 = Bytes::get_Java_u2(bytes); | |
1012 idx2 = Bytes::get_Java_u2(bytes+2); | |
1013 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
1014 ent_size = 4; | |
1015 break; | |
1016 } | |
1017 case JVM_CONSTANT_ClassIndex: { | |
1018 printf("ClassIndex %s", WARN_MSG); | |
1019 break; | |
1020 } | |
1021 case JVM_CONSTANT_UnresolvedClass: { | |
1022 printf("UnresolvedClass: %s", WARN_MSG); | |
1023 break; | |
1024 } | |
1025 case JVM_CONSTANT_UnresolvedClassInError: { | |
1026 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
1027 break; | |
1028 } | |
1029 case JVM_CONSTANT_StringIndex: { | |
1030 printf("StringIndex: %s", WARN_MSG); | |
1031 break; | |
1032 } | |
1033 case JVM_CONSTANT_UnresolvedString: { | |
1034 printf("UnresolvedString: %s", WARN_MSG); | |
1035 break; | |
1036 } | |
1037 } | |
1038 printf(";\n"); | |
1039 bytes += ent_size; | |
1040 size += ent_size; | |
1041 } | |
1042 printf("Cpool size: %d\n", size); | |
1043 fflush(0); | |
1044 return; | |
1045 } /* end print_cpool_bytes */ | |
1046 | |
1047 | |
1048 // Returns size of constant pool entry. | |
1049 jint constantPoolOopDesc::cpool_entry_size(jint idx) { | |
1050 switch(tag_at(idx).value()) { | |
1051 case JVM_CONSTANT_Invalid: | |
1052 case JVM_CONSTANT_Unicode: | |
1053 return 1; | |
1054 | |
1055 case JVM_CONSTANT_Utf8: | |
1056 return 3 + symbol_at(idx)->utf8_length(); | |
1057 | |
1058 case JVM_CONSTANT_Class: | |
1059 case JVM_CONSTANT_String: | |
1060 case JVM_CONSTANT_ClassIndex: | |
1061 case JVM_CONSTANT_UnresolvedClass: | |
1062 case JVM_CONSTANT_UnresolvedClassInError: | |
1063 case JVM_CONSTANT_StringIndex: | |
1064 case JVM_CONSTANT_UnresolvedString: | |
1065 return 3; | |
1066 | |
1067 case JVM_CONSTANT_Integer: | |
1068 case JVM_CONSTANT_Float: | |
1069 case JVM_CONSTANT_Fieldref: | |
1070 case JVM_CONSTANT_Methodref: | |
1071 case JVM_CONSTANT_InterfaceMethodref: | |
1072 case JVM_CONSTANT_NameAndType: | |
1073 return 5; | |
1074 | |
1075 case JVM_CONSTANT_Long: | |
1076 case JVM_CONSTANT_Double: | |
1077 return 9; | |
1078 } | |
1079 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
1080 return 1; | |
1081 } /* end cpool_entry_size */ | |
1082 | |
1083 | |
1084 // SymbolHashMap is used to find a constant pool index from a string. | |
1085 // This function fills in SymbolHashMaps, one for utf8s and one for | |
1086 // class names, returns size of the cpool raw bytes. | |
1087 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, | |
1088 SymbolHashMap *classmap) { | |
1089 jint size = 0; | |
1090 | |
1091 for (u2 idx = 1; idx < length(); idx++) { | |
1092 u2 tag = tag_at(idx).value(); | |
1093 size += cpool_entry_size(idx); | |
1094 | |
1095 switch(tag) { | |
1096 case JVM_CONSTANT_Utf8: { | |
1097 symbolOop sym = symbol_at(idx); | |
1098 symmap->add_entry(sym, idx); | |
1099 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
1100 break; | |
1101 } | |
1102 case JVM_CONSTANT_Class: | |
1103 case JVM_CONSTANT_UnresolvedClass: | |
1104 case JVM_CONSTANT_UnresolvedClassInError: { | |
1105 symbolOop sym = klass_name_at(idx); | |
1106 classmap->add_entry(sym, idx); | |
1107 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
1108 break; | |
1109 } | |
1110 case JVM_CONSTANT_Long: | |
1111 case JVM_CONSTANT_Double: { | |
1112 idx++; // Both Long and Double take two cpool slots | |
1113 break; | |
1114 } | |
1115 } | |
1116 } | |
1117 return size; | |
1118 } /* end hash_utf8_entries_to */ | |
1119 | |
1120 | |
1121 // Copy cpool bytes. | |
1122 // Returns: | |
1123 // 0, in case of OutOfMemoryError | |
1124 // -1, in case of internal error | |
1125 // > 0, count of the raw cpool bytes that have been copied | |
1126 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, | |
1127 SymbolHashMap* tbl, | |
1128 unsigned char *bytes) { | |
1129 u2 idx1, idx2; | |
1130 jint size = 0; | |
1131 jint cnt = length(); | |
1132 unsigned char *start_bytes = bytes; | |
1133 | |
1134 for (jint idx = 1; idx < cnt; idx++) { | |
1135 u1 tag = tag_at(idx).value(); | |
1136 jint ent_size = cpool_entry_size(idx); | |
1137 | |
1138 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
1139 | |
1140 *bytes = tag; | |
1141 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
1142 switch(tag) { | |
1143 case JVM_CONSTANT_Invalid: { | |
1144 DBG(printf("JVM_CONSTANT_Invalid")); | |
1145 break; | |
1146 } | |
1147 case JVM_CONSTANT_Unicode: { | |
1148 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
1149 DBG(printf("JVM_CONSTANT_Unicode")); | |
1150 break; | |
1151 } | |
1152 case JVM_CONSTANT_Utf8: { | |
1153 symbolOop sym = symbol_at(idx); | |
1154 char* str = sym->as_utf8(); | |
1155 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
1156 int len = (int) strlen(str); | |
1157 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
1158 for (int i = 0; i < len; i++) { | |
1159 bytes[3+i] = (u1) str[i]; | |
1160 } | |
1161 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
1162 break; | |
1163 } | |
1164 case JVM_CONSTANT_Integer: { | |
1165 jint val = int_at(idx); | |
1166 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1167 break; | |
1168 } | |
1169 case JVM_CONSTANT_Float: { | |
1170 jfloat val = float_at(idx); | |
1171 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1172 break; | |
1173 } | |
1174 case JVM_CONSTANT_Long: { | |
1175 jlong val = long_at(idx); | |
1176 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1177 idx++; // Long takes two cpool slots | |
1178 break; | |
1179 } | |
1180 case JVM_CONSTANT_Double: { | |
1181 jdouble val = double_at(idx); | |
1182 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1183 idx++; // Double takes two cpool slots | |
1184 break; | |
1185 } | |
1186 case JVM_CONSTANT_Class: | |
1187 case JVM_CONSTANT_UnresolvedClass: | |
1188 case JVM_CONSTANT_UnresolvedClassInError: { | |
1189 *bytes = JVM_CONSTANT_Class; | |
1190 symbolOop sym = klass_name_at(idx); | |
1191 idx1 = tbl->symbol_to_value(sym); | |
1192 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1193 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1194 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
1195 break; | |
1196 } | |
1197 case JVM_CONSTANT_String: { | |
1198 unsigned int hash; | |
1199 char *str = string_at_noresolve(idx); | |
1200 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); | |
1201 idx1 = tbl->symbol_to_value(sym); | |
1202 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1203 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1204 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); | |
1205 break; | |
1206 } | |
1207 case JVM_CONSTANT_UnresolvedString: { | |
1208 *bytes = JVM_CONSTANT_String; | |
1209 symbolOop sym = unresolved_string_at(idx); | |
1210 idx1 = tbl->symbol_to_value(sym); | |
1211 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1212 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1213 DBG(char *str = sym->as_utf8()); | |
1214 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); | |
1215 break; | |
1216 } | |
1217 case JVM_CONSTANT_Fieldref: | |
1218 case JVM_CONSTANT_Methodref: | |
1219 case JVM_CONSTANT_InterfaceMethodref: { | |
1220 idx1 = uncached_klass_ref_index_at(idx); | |
1221 idx2 = uncached_name_and_type_ref_index_at(idx); | |
1222 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1223 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1224 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
1225 break; | |
1226 } | |
1227 case JVM_CONSTANT_NameAndType: { | |
1228 idx1 = name_ref_index_at(idx); | |
1229 idx2 = signature_ref_index_at(idx); | |
1230 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1231 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1232 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
1233 break; | |
1234 } | |
1235 case JVM_CONSTANT_ClassIndex: { | |
1236 *bytes = JVM_CONSTANT_Class; | |
1237 idx1 = klass_index_at(idx); | |
1238 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1239 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
1240 break; | |
1241 } | |
1242 case JVM_CONSTANT_StringIndex: { | |
1243 *bytes = JVM_CONSTANT_String; | |
1244 idx1 = string_index_at(idx); | |
1245 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1246 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
1247 break; | |
1248 } | |
1249 } | |
1250 DBG(printf("\n")); | |
1251 bytes += ent_size; | |
1252 size += ent_size; | |
1253 } | |
1254 assert(size == cpool_size, "Size mismatch"); | |
1255 | |
1256 // Keep temorarily for debugging until it's stable. | |
1257 DBG(print_cpool_bytes(cnt, start_bytes)); | |
1258 return (int)(bytes - start_bytes); | |
1259 } /* end copy_cpool_bytes */ | |
1260 | |
1261 | |
1262 void SymbolHashMap::add_entry(symbolOop sym, u2 value) { | |
1263 char *str = sym->as_utf8(); | |
1264 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
1265 unsigned int index = hash % table_size(); | |
1266 | |
1267 // check if already in map | |
1268 // we prefer the first entry since it is more likely to be what was used in | |
1269 // the class file | |
1270 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
1271 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1272 if (en->hash() == hash && en->symbol() == sym) { | |
1273 return; // already there | |
1274 } | |
1275 } | |
1276 | |
1277 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
1278 entry->set_next(bucket(index)); | |
1279 _buckets[index].set_entry(entry); | |
1280 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1281 } | |
1282 | |
1283 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) { | |
1284 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); | |
1285 char *str = sym->as_utf8(); | |
1286 int len = sym->utf8_length(); | |
1287 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
1288 unsigned int index = hash % table_size(); | |
1289 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
1290 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1291 if (en->hash() == hash && en->symbol() == sym) { | |
1292 return en; | |
1293 } | |
1294 } | |
1295 return NULL; | |
1296 } |