Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/constantPoolOop.cpp @ 973:ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
Reviewed-by: kamg, phh
author | acorn |
---|---|
date | Fri, 04 Sep 2009 12:53:02 -0400 |
parents | 47ffceb239d0 |
children | 389049f3f393 |
rev | line source |
---|---|
0 | 1 /* |
579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
252 symbolOop constantPoolOopDesc::impl_name_ref_at(int which, bool uncached) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
253 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 254 return symbol_at(name_index); |
255 } | |
256 | |
257 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
258 symbolOop constantPoolOopDesc::impl_signature_ref_at(int which, bool uncached) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
259 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 260 return symbol_at(signature_index); |
261 } | |
262 | |
263 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
264 int constantPoolOopDesc::impl_name_and_type_ref_index_at(int which, bool uncached) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
265 jint ref_index = field_or_method_at(which, uncached); |
0 | 266 return extract_high_short_from_int(ref_index); |
267 } | |
268 | |
269 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
270 int constantPoolOopDesc::impl_klass_ref_index_at(int which, bool uncached) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
271 jint ref_index = field_or_method_at(which, uncached); |
0 | 272 return extract_low_short_from_int(ref_index); |
273 } | |
274 | |
275 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
276 |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
277 int constantPoolOopDesc::map_instruction_operand_to_index(int operand) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
278 if (constantPoolCacheOopDesc::is_secondary_index(operand)) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
279 return cache()->main_entry_at(operand)->constant_pool_index(); |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
280 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
281 assert((int)(u2)operand == operand, "clean u2"); |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
282 int index = Bytes::swap_u2(operand); |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
283 return cache()->entry_at(index)->constant_pool_index(); |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
284 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
285 |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
286 |
0 | 287 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
288 if (k->oop_is_instance() || k->oop_is_objArray()) { | |
289 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
290 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); | |
291 KlassHandle element (THREAD, elem_oop); | |
292 | |
293 // The element type could be a typeArray - we only need the access check if it is | |
294 // an reference to another class | |
295 if (element->oop_is_instance()) { | |
296 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
297 } | |
298 } | |
299 } | |
300 | |
301 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
302 int constantPoolOopDesc::name_ref_index_at(int which_nt) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
303 jint ref_index = name_and_type_at(which_nt); |
0 | 304 return extract_low_short_from_int(ref_index); |
305 } | |
306 | |
307 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
308 int constantPoolOopDesc::signature_ref_index_at(int which_nt) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
579
diff
changeset
|
309 jint ref_index = name_and_type_at(which_nt); |
0 | 310 return extract_high_short_from_int(ref_index); |
311 } | |
312 | |
313 | |
314 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { | |
315 return klass_at(klass_ref_index_at(which), CHECK_NULL); | |
316 } | |
317 | |
318 | |
319 symbolOop constantPoolOopDesc::klass_name_at(int which) { | |
320 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), | |
321 "Corrupted constant pool"); | |
322 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
323 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
324 // tag is not updated atomicly. | |
325 oop entry = *(obj_at_addr(which)); | |
326 if (entry->is_klass()) { | |
327 // Already resolved - return entry's name. | |
328 return klassOop(entry)->klass_part()->name(); | |
329 } else { | |
330 assert(entry->is_symbol(), "must be either symbol or klass"); | |
331 return (symbolOop)entry; | |
332 } | |
333 } | |
334 | |
335 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) { | |
336 jint ref_index = klass_ref_index_at(which); | |
337 return klass_at_noresolve(ref_index); | |
338 } | |
339 | |
340 char* constantPoolOopDesc::string_at_noresolve(int which) { | |
341 // Test entry type in case string is resolved while in here. | |
342 oop entry = *(obj_at_addr(which)); | |
343 if (entry->is_symbol()) { | |
344 return ((symbolOop)entry)->as_C_string(); | |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
345 } 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
|
346 return java_lang_String::as_utf8_string(entry); |
0 | 347 } else { |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
348 return (char*)"<pseudo-string>"; |
0 | 349 } |
350 } | |
351 | |
352 | |
353 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { | |
354 return FieldType::basic_type(symbol_at(which)); | |
355 } | |
356 | |
357 | |
358 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { | |
359 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused | |
360 if (this_oop->tag_at(index).is_unresolved_string()) { | |
361 this_oop->string_at(index, CHECK); | |
362 } | |
363 } | |
364 } | |
365 | |
366 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { | |
367 oop entry = *(this_oop->obj_at_addr(which)); | |
368 if (entry->is_symbol()) { | |
369 ObjectLocker ol(this_oop, THREAD); | |
370 if (this_oop->tag_at(which).is_unresolved_string()) { | |
371 // Intern string | |
372 symbolOop sym = this_oop->unresolved_string_at(which); | |
373 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); | |
374 this_oop->string_at_put(which, entry); | |
375 } else { | |
376 // Another thread beat us and interned string, read string from constant pool | |
377 entry = this_oop->resolved_string_at(which); | |
378 } | |
379 } | |
380 assert(java_lang_String::is_instance(entry), "must be string"); | |
381 return entry; | |
382 } | |
383 | |
384 | |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
385 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
|
386 oop entry = *(obj_at_addr(which)); |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
387 if (entry->is_symbol()) |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
388 // 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
|
389 return false; |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
390 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
|
391 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
|
392 else |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
393 // truly pseudo |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
394 return true; |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
395 } |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
396 |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
0
diff
changeset
|
397 |
0 | 398 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, |
399 int which) { | |
400 // Names are interned, so we can compare symbolOops directly | |
401 symbolOop cp_name = klass_name_at(which); | |
402 return (cp_name == k->name()); | |
403 } | |
404 | |
405 | |
406 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { | |
407 ResourceMark rm; | |
408 int count = 0; | |
409 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused | |
410 if (tag_at(index).is_unresolved_string()) { | |
411 // Intern string | |
412 symbolOop sym = unresolved_string_at(index); | |
413 oop entry = StringTable::intern(sym, CHECK_(-1)); | |
414 string_at_put(index, entry); | |
415 } | |
416 } | |
417 return count; | |
418 } | |
419 | |
420 | |
421 // Iterate over symbols which are used as class, field, method names and | |
422 // signatures (in preparation for writing to the shared archive). | |
423 | |
424 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) { | |
425 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
426 switch (tag_at(index).value()) { | |
427 | |
428 case JVM_CONSTANT_UnresolvedClass: | |
429 closure->do_oop(obj_at_addr(index)); | |
430 break; | |
431 | |
432 case JVM_CONSTANT_NameAndType: | |
433 { | |
434 int i = *int_at_addr(index); | |
435 closure->do_oop(obj_at_addr((unsigned)i >> 16)); | |
436 closure->do_oop(obj_at_addr((unsigned)i & 0xffff)); | |
437 } | |
438 break; | |
439 | |
440 case JVM_CONSTANT_Class: | |
441 case JVM_CONSTANT_InterfaceMethodref: | |
442 case JVM_CONSTANT_Fieldref: | |
443 case JVM_CONSTANT_Methodref: | |
444 case JVM_CONSTANT_Integer: | |
445 case JVM_CONSTANT_Float: | |
446 // Do nothing! Not an oop. | |
447 // These constant types do not reference symbols at this point. | |
448 break; | |
449 | |
450 case JVM_CONSTANT_String: | |
451 // Do nothing! Not a symbol. | |
452 break; | |
453 | |
454 case JVM_CONSTANT_UnresolvedString: | |
455 case JVM_CONSTANT_Utf8: | |
456 // These constants are symbols, but unless these symbols are | |
457 // actually to be used for something, we don't want to mark them. | |
458 break; | |
459 | |
460 case JVM_CONSTANT_Long: | |
461 case JVM_CONSTANT_Double: | |
462 // Do nothing! Not an oop. (But takes two pool entries.) | |
463 ++index; | |
464 break; | |
465 | |
466 default: | |
467 ShouldNotReachHere(); | |
468 break; | |
469 } | |
470 } | |
471 } | |
472 | |
473 | |
474 // Iterate over the [one] tags array (in preparation for writing to the | |
475 // shared archive). | |
476 | |
477 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { | |
478 closure->do_oop(tags_addr()); | |
479 } | |
480 | |
481 | |
482 // Iterate over String objects (in preparation for writing to the shared | |
483 // archive). | |
484 | |
485 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { | |
486 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
487 switch (tag_at(index).value()) { | |
488 | |
489 case JVM_CONSTANT_UnresolvedClass: | |
490 case JVM_CONSTANT_NameAndType: | |
491 // Do nothing! Not a String. | |
492 break; | |
493 | |
494 case JVM_CONSTANT_Class: | |
495 case JVM_CONSTANT_InterfaceMethodref: | |
496 case JVM_CONSTANT_Fieldref: | |
497 case JVM_CONSTANT_Methodref: | |
498 case JVM_CONSTANT_Integer: | |
499 case JVM_CONSTANT_Float: | |
500 // Do nothing! Not an oop. | |
501 // These constant types do not reference symbols at this point. | |
502 break; | |
503 | |
504 case JVM_CONSTANT_String: | |
505 closure->do_oop(obj_at_addr(index)); | |
506 break; | |
507 | |
508 case JVM_CONSTANT_UnresolvedString: | |
509 case JVM_CONSTANT_Utf8: | |
510 // These constants are symbols, but unless these symbols are | |
511 // actually to be used for something, we don't want to mark them. | |
512 break; | |
513 | |
514 case JVM_CONSTANT_Long: | |
515 case JVM_CONSTANT_Double: | |
516 // Do nothing! Not an oop. (But takes two pool entries.) | |
517 ++index; | |
518 break; | |
519 | |
520 default: | |
521 ShouldNotReachHere(); | |
522 break; | |
523 } | |
524 } | |
525 } | |
526 | |
527 | |
528 // Compare this constant pool's entry at index1 to the constant pool | |
529 // cp2's entry at index2. | |
530 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, | |
531 int index2, TRAPS) { | |
532 | |
533 jbyte t1 = tag_at(index1).value(); | |
534 jbyte t2 = cp2->tag_at(index2).value(); | |
535 | |
536 | |
537 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
538 // when comparing | |
539 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
540 t1 = JVM_CONSTANT_UnresolvedClass; | |
541 } | |
542 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
543 t2 = JVM_CONSTANT_UnresolvedClass; | |
544 } | |
545 | |
546 if (t1 != t2) { | |
547 // Not the same entry type so there is nothing else to check. Note | |
548 // that this style of checking will consider resolved/unresolved | |
549 // class pairs and resolved/unresolved string pairs as different. | |
550 // From the constantPoolOop API point of view, this is correct | |
551 // behavior. See constantPoolKlass::merge() to see how this plays | |
552 // out in the context of constantPoolOop merging. | |
553 return false; | |
554 } | |
555 | |
556 switch (t1) { | |
557 case JVM_CONSTANT_Class: | |
558 { | |
559 klassOop k1 = klass_at(index1, CHECK_false); | |
560 klassOop k2 = cp2->klass_at(index2, CHECK_false); | |
561 if (k1 == k2) { | |
562 return true; | |
563 } | |
564 } break; | |
565 | |
566 case JVM_CONSTANT_ClassIndex: | |
567 { | |
568 int recur1 = klass_index_at(index1); | |
569 int recur2 = cp2->klass_index_at(index2); | |
570 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
571 if (match) { | |
572 return true; | |
573 } | |
574 } break; | |
575 | |
576 case JVM_CONSTANT_Double: | |
577 { | |
578 jdouble d1 = double_at(index1); | |
579 jdouble d2 = cp2->double_at(index2); | |
580 if (d1 == d2) { | |
581 return true; | |
582 } | |
583 } break; | |
584 | |
585 case JVM_CONSTANT_Fieldref: | |
586 case JVM_CONSTANT_InterfaceMethodref: | |
587 case JVM_CONSTANT_Methodref: | |
588 { | |
589 int recur1 = uncached_klass_ref_index_at(index1); | |
590 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
591 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
592 if (match) { | |
593 recur1 = uncached_name_and_type_ref_index_at(index1); | |
594 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
595 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
596 if (match) { | |
597 return true; | |
598 } | |
599 } | |
600 } break; | |
601 | |
602 case JVM_CONSTANT_Float: | |
603 { | |
604 jfloat f1 = float_at(index1); | |
605 jfloat f2 = cp2->float_at(index2); | |
606 if (f1 == f2) { | |
607 return true; | |
608 } | |
609 } break; | |
610 | |
611 case JVM_CONSTANT_Integer: | |
612 { | |
613 jint i1 = int_at(index1); | |
614 jint i2 = cp2->int_at(index2); | |
615 if (i1 == i2) { | |
616 return true; | |
617 } | |
618 } break; | |
619 | |
620 case JVM_CONSTANT_Long: | |
621 { | |
622 jlong l1 = long_at(index1); | |
623 jlong l2 = cp2->long_at(index2); | |
624 if (l1 == l2) { | |
625 return true; | |
626 } | |
627 } break; | |
628 | |
629 case JVM_CONSTANT_NameAndType: | |
630 { | |
631 int recur1 = name_ref_index_at(index1); | |
632 int recur2 = cp2->name_ref_index_at(index2); | |
633 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
634 if (match) { | |
635 recur1 = signature_ref_index_at(index1); | |
636 recur2 = cp2->signature_ref_index_at(index2); | |
637 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
638 if (match) { | |
639 return true; | |
640 } | |
641 } | |
642 } break; | |
643 | |
644 case JVM_CONSTANT_String: | |
645 { | |
646 oop s1 = string_at(index1, CHECK_false); | |
647 oop s2 = cp2->string_at(index2, CHECK_false); | |
648 if (s1 == s2) { | |
649 return true; | |
650 } | |
651 } break; | |
652 | |
653 case JVM_CONSTANT_StringIndex: | |
654 { | |
655 int recur1 = string_index_at(index1); | |
656 int recur2 = cp2->string_index_at(index2); | |
657 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
658 if (match) { | |
659 return true; | |
660 } | |
661 } break; | |
662 | |
663 case JVM_CONSTANT_UnresolvedClass: | |
664 { | |
665 symbolOop k1 = unresolved_klass_at(index1); | |
666 symbolOop k2 = cp2->unresolved_klass_at(index2); | |
667 if (k1 == k2) { | |
668 return true; | |
669 } | |
670 } break; | |
671 | |
672 case JVM_CONSTANT_UnresolvedString: | |
673 { | |
674 symbolOop s1 = unresolved_string_at(index1); | |
675 symbolOop s2 = cp2->unresolved_string_at(index2); | |
676 if (s1 == s2) { | |
677 return true; | |
678 } | |
679 } break; | |
680 | |
681 case JVM_CONSTANT_Utf8: | |
682 { | |
683 symbolOop s1 = symbol_at(index1); | |
684 symbolOop s2 = cp2->symbol_at(index2); | |
685 if (s1 == s2) { | |
686 return true; | |
687 } | |
688 } break; | |
689 | |
690 // Invalid is used as the tag for the second constant pool entry | |
691 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
692 // not be seen by itself. | |
693 case JVM_CONSTANT_Invalid: // fall through | |
694 | |
695 default: | |
696 ShouldNotReachHere(); | |
697 break; | |
698 } | |
699 | |
700 return false; | |
701 } // end compare_entry_to() | |
702 | |
703 | |
704 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
705 // to the constant pool to_cp's entries starting at to_i. A total of | |
706 // (end_i - start_i) + 1 entries are copied. | |
707 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i, | |
708 constantPoolHandle to_cp, int to_i, TRAPS) { | |
709 | |
710 int dest_i = to_i; // leave original alone for debug purposes | |
711 | |
712 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { | |
713 copy_entry_to(src_i, to_cp, dest_i, CHECK); | |
714 | |
715 switch (tag_at(src_i).value()) { | |
716 case JVM_CONSTANT_Double: | |
717 case JVM_CONSTANT_Long: | |
718 // double and long take two constant pool entries | |
719 src_i += 2; | |
720 dest_i += 2; | |
721 break; | |
722 | |
723 default: | |
724 // all others take one constant pool entry | |
725 src_i++; | |
726 dest_i++; | |
727 break; | |
728 } | |
729 } | |
730 } // end copy_cp_to() | |
731 | |
732 | |
733 // Copy this constant pool's entry at from_i to the constant pool | |
734 // to_cp's entry at to_i. | |
735 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp, | |
736 int to_i, TRAPS) { | |
737 | |
738 switch (tag_at(from_i).value()) { | |
739 case JVM_CONSTANT_Class: | |
740 { | |
741 klassOop k = klass_at(from_i, CHECK); | |
742 to_cp->klass_at_put(to_i, k); | |
743 } break; | |
744 | |
745 case JVM_CONSTANT_ClassIndex: | |
746 { | |
747 jint ki = klass_index_at(from_i); | |
748 to_cp->klass_index_at_put(to_i, ki); | |
749 } break; | |
750 | |
751 case JVM_CONSTANT_Double: | |
752 { | |
753 jdouble d = double_at(from_i); | |
754 to_cp->double_at_put(to_i, d); | |
755 // double takes two constant pool entries so init second entry's tag | |
756 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
757 } break; | |
758 | |
759 case JVM_CONSTANT_Fieldref: | |
760 { | |
761 int class_index = uncached_klass_ref_index_at(from_i); | |
762 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
763 to_cp->field_at_put(to_i, class_index, name_and_type_index); | |
764 } break; | |
765 | |
766 case JVM_CONSTANT_Float: | |
767 { | |
768 jfloat f = float_at(from_i); | |
769 to_cp->float_at_put(to_i, f); | |
770 } break; | |
771 | |
772 case JVM_CONSTANT_Integer: | |
773 { | |
774 jint i = int_at(from_i); | |
775 to_cp->int_at_put(to_i, i); | |
776 } break; | |
777 | |
778 case JVM_CONSTANT_InterfaceMethodref: | |
779 { | |
780 int class_index = uncached_klass_ref_index_at(from_i); | |
781 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
782 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); | |
783 } break; | |
784 | |
785 case JVM_CONSTANT_Long: | |
786 { | |
787 jlong l = long_at(from_i); | |
788 to_cp->long_at_put(to_i, l); | |
789 // long takes two constant pool entries so init second entry's tag | |
790 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
791 } break; | |
792 | |
793 case JVM_CONSTANT_Methodref: | |
794 { | |
795 int class_index = uncached_klass_ref_index_at(from_i); | |
796 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
797 to_cp->method_at_put(to_i, class_index, name_and_type_index); | |
798 } break; | |
799 | |
800 case JVM_CONSTANT_NameAndType: | |
801 { | |
802 int name_ref_index = name_ref_index_at(from_i); | |
803 int signature_ref_index = signature_ref_index_at(from_i); | |
804 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); | |
805 } break; | |
806 | |
807 case JVM_CONSTANT_String: | |
808 { | |
809 oop s = string_at(from_i, CHECK); | |
810 to_cp->string_at_put(to_i, s); | |
811 } break; | |
812 | |
813 case JVM_CONSTANT_StringIndex: | |
814 { | |
815 jint si = string_index_at(from_i); | |
816 to_cp->string_index_at_put(to_i, si); | |
817 } break; | |
818 | |
819 case JVM_CONSTANT_UnresolvedClass: | |
820 { | |
821 symbolOop k = unresolved_klass_at(from_i); | |
822 to_cp->unresolved_klass_at_put(to_i, k); | |
823 } break; | |
824 | |
825 case JVM_CONSTANT_UnresolvedClassInError: | |
826 { | |
827 symbolOop k = unresolved_klass_at(from_i); | |
828 to_cp->unresolved_klass_at_put(to_i, k); | |
829 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
830 } break; | |
831 | |
832 | |
833 case JVM_CONSTANT_UnresolvedString: | |
834 { | |
835 symbolOop s = unresolved_string_at(from_i); | |
836 to_cp->unresolved_string_at_put(to_i, s); | |
837 } break; | |
838 | |
839 case JVM_CONSTANT_Utf8: | |
840 { | |
841 symbolOop s = symbol_at(from_i); | |
842 to_cp->symbol_at_put(to_i, s); | |
843 } break; | |
844 | |
845 // Invalid is used as the tag for the second constant pool entry | |
846 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
847 // not be seen by itself. | |
848 case JVM_CONSTANT_Invalid: // fall through | |
849 | |
850 default: | |
851 { | |
852 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb | |
853 ShouldNotReachHere(); | |
854 } break; | |
855 } | |
856 } // end copy_entry_to() | |
857 | |
858 | |
859 // Search constant pool search_cp for an entry that matches this | |
860 // constant pool's entry at pattern_i. Returns the index of a | |
861 // matching entry or zero (0) if there is no matching entry. | |
862 int constantPoolOopDesc::find_matching_entry(int pattern_i, | |
863 constantPoolHandle search_cp, TRAPS) { | |
864 | |
865 // index zero (0) is not used | |
866 for (int i = 1; i < search_cp->length(); i++) { | |
867 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
868 if (found) { | |
869 return i; | |
870 } | |
871 } | |
872 | |
873 return 0; // entry not found; return unused index zero (0) | |
874 } // end find_matching_entry() | |
875 | |
876 | |
877 #ifndef PRODUCT | |
878 | |
879 const char* constantPoolOopDesc::printable_name_at(int which) { | |
880 | |
881 constantTag tag = tag_at(which); | |
882 | |
883 if (tag.is_unresolved_string() || tag.is_string()) { | |
884 return string_at_noresolve(which); | |
885 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
886 return klass_name_at(which)->as_C_string(); | |
887 } else if (tag.is_symbol()) { | |
888 return symbol_at(which)->as_C_string(); | |
889 } | |
890 return ""; | |
891 } | |
892 | |
893 #endif // PRODUCT | |
894 | |
895 | |
896 // JVMTI GetConstantPool support | |
897 | |
898 // For temporary use until code is stable. | |
899 #define DBG(code) | |
900 | |
901 static const char* WARN_MSG = "Must not be such entry!"; | |
902 | |
903 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
904 jint size = 0; | |
905 u2 idx1, idx2; | |
906 | |
907 for (jint idx = 1; idx < cnt; idx++) { | |
908 jint ent_size = 0; | |
909 u1 tag = *bytes++; | |
910 size++; // count tag | |
911 | |
912 printf("const #%03d, tag: %02d ", idx, tag); | |
913 switch(tag) { | |
914 case JVM_CONSTANT_Invalid: { | |
915 printf("Invalid"); | |
916 break; | |
917 } | |
918 case JVM_CONSTANT_Unicode: { | |
919 printf("Unicode %s", WARN_MSG); | |
920 break; | |
921 } | |
922 case JVM_CONSTANT_Utf8: { | |
923 u2 len = Bytes::get_Java_u2(bytes); | |
924 char str[128]; | |
925 if (len > 127) { | |
926 len = 127; | |
927 } | |
928 strncpy(str, (char *) (bytes+2), len); | |
929 str[len] = '\0'; | |
930 printf("Utf8 \"%s\"", str); | |
931 ent_size = 2 + len; | |
932 break; | |
933 } | |
934 case JVM_CONSTANT_Integer: { | |
935 u4 val = Bytes::get_Java_u4(bytes); | |
936 printf("int %d", *(int *) &val); | |
937 ent_size = 4; | |
938 break; | |
939 } | |
940 case JVM_CONSTANT_Float: { | |
941 u4 val = Bytes::get_Java_u4(bytes); | |
942 printf("float %5.3ff", *(float *) &val); | |
943 ent_size = 4; | |
944 break; | |
945 } | |
946 case JVM_CONSTANT_Long: { | |
947 u8 val = Bytes::get_Java_u8(bytes); | |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
431
diff
changeset
|
948 printf("long "INT64_FORMAT, *(jlong *) &val); |
0 | 949 ent_size = 8; |
950 idx++; // Long takes two cpool slots | |
951 break; | |
952 } | |
953 case JVM_CONSTANT_Double: { | |
954 u8 val = Bytes::get_Java_u8(bytes); | |
955 printf("double %5.3fd", *(jdouble *)&val); | |
956 ent_size = 8; | |
957 idx++; // Double takes two cpool slots | |
958 break; | |
959 } | |
960 case JVM_CONSTANT_Class: { | |
961 idx1 = Bytes::get_Java_u2(bytes); | |
962 printf("class #%03d", idx1); | |
963 ent_size = 2; | |
964 break; | |
965 } | |
966 case JVM_CONSTANT_String: { | |
967 idx1 = Bytes::get_Java_u2(bytes); | |
968 printf("String #%03d", idx1); | |
969 ent_size = 2; | |
970 break; | |
971 } | |
972 case JVM_CONSTANT_Fieldref: { | |
973 idx1 = Bytes::get_Java_u2(bytes); | |
974 idx2 = Bytes::get_Java_u2(bytes+2); | |
975 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
976 ent_size = 4; | |
977 break; | |
978 } | |
979 case JVM_CONSTANT_Methodref: { | |
980 idx1 = Bytes::get_Java_u2(bytes); | |
981 idx2 = Bytes::get_Java_u2(bytes+2); | |
982 printf("Method #%03d, #%03d", idx1, idx2); | |
983 ent_size = 4; | |
984 break; | |
985 } | |
986 case JVM_CONSTANT_InterfaceMethodref: { | |
987 idx1 = Bytes::get_Java_u2(bytes); | |
988 idx2 = Bytes::get_Java_u2(bytes+2); | |
989 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
990 ent_size = 4; | |
991 break; | |
992 } | |
993 case JVM_CONSTANT_NameAndType: { | |
994 idx1 = Bytes::get_Java_u2(bytes); | |
995 idx2 = Bytes::get_Java_u2(bytes+2); | |
996 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
997 ent_size = 4; | |
998 break; | |
999 } | |
1000 case JVM_CONSTANT_ClassIndex: { | |
1001 printf("ClassIndex %s", WARN_MSG); | |
1002 break; | |
1003 } | |
1004 case JVM_CONSTANT_UnresolvedClass: { | |
1005 printf("UnresolvedClass: %s", WARN_MSG); | |
1006 break; | |
1007 } | |
1008 case JVM_CONSTANT_UnresolvedClassInError: { | |
1009 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
1010 break; | |
1011 } | |
1012 case JVM_CONSTANT_StringIndex: { | |
1013 printf("StringIndex: %s", WARN_MSG); | |
1014 break; | |
1015 } | |
1016 case JVM_CONSTANT_UnresolvedString: { | |
1017 printf("UnresolvedString: %s", WARN_MSG); | |
1018 break; | |
1019 } | |
1020 } | |
1021 printf(";\n"); | |
1022 bytes += ent_size; | |
1023 size += ent_size; | |
1024 } | |
1025 printf("Cpool size: %d\n", size); | |
1026 fflush(0); | |
1027 return; | |
1028 } /* end print_cpool_bytes */ | |
1029 | |
1030 | |
1031 // Returns size of constant pool entry. | |
1032 jint constantPoolOopDesc::cpool_entry_size(jint idx) { | |
1033 switch(tag_at(idx).value()) { | |
1034 case JVM_CONSTANT_Invalid: | |
1035 case JVM_CONSTANT_Unicode: | |
1036 return 1; | |
1037 | |
1038 case JVM_CONSTANT_Utf8: | |
1039 return 3 + symbol_at(idx)->utf8_length(); | |
1040 | |
1041 case JVM_CONSTANT_Class: | |
1042 case JVM_CONSTANT_String: | |
1043 case JVM_CONSTANT_ClassIndex: | |
1044 case JVM_CONSTANT_UnresolvedClass: | |
1045 case JVM_CONSTANT_UnresolvedClassInError: | |
1046 case JVM_CONSTANT_StringIndex: | |
1047 case JVM_CONSTANT_UnresolvedString: | |
1048 return 3; | |
1049 | |
1050 case JVM_CONSTANT_Integer: | |
1051 case JVM_CONSTANT_Float: | |
1052 case JVM_CONSTANT_Fieldref: | |
1053 case JVM_CONSTANT_Methodref: | |
1054 case JVM_CONSTANT_InterfaceMethodref: | |
1055 case JVM_CONSTANT_NameAndType: | |
1056 return 5; | |
1057 | |
1058 case JVM_CONSTANT_Long: | |
1059 case JVM_CONSTANT_Double: | |
1060 return 9; | |
1061 } | |
1062 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
1063 return 1; | |
1064 } /* end cpool_entry_size */ | |
1065 | |
1066 | |
1067 // SymbolHashMap is used to find a constant pool index from a string. | |
1068 // This function fills in SymbolHashMaps, one for utf8s and one for | |
1069 // class names, returns size of the cpool raw bytes. | |
1070 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, | |
1071 SymbolHashMap *classmap) { | |
1072 jint size = 0; | |
1073 | |
1074 for (u2 idx = 1; idx < length(); idx++) { | |
1075 u2 tag = tag_at(idx).value(); | |
1076 size += cpool_entry_size(idx); | |
1077 | |
1078 switch(tag) { | |
1079 case JVM_CONSTANT_Utf8: { | |
1080 symbolOop sym = symbol_at(idx); | |
1081 symmap->add_entry(sym, idx); | |
1082 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
1083 break; | |
1084 } | |
1085 case JVM_CONSTANT_Class: | |
1086 case JVM_CONSTANT_UnresolvedClass: | |
1087 case JVM_CONSTANT_UnresolvedClassInError: { | |
1088 symbolOop sym = klass_name_at(idx); | |
1089 classmap->add_entry(sym, idx); | |
1090 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
1091 break; | |
1092 } | |
1093 case JVM_CONSTANT_Long: | |
1094 case JVM_CONSTANT_Double: { | |
1095 idx++; // Both Long and Double take two cpool slots | |
1096 break; | |
1097 } | |
1098 } | |
1099 } | |
1100 return size; | |
1101 } /* end hash_utf8_entries_to */ | |
1102 | |
1103 | |
1104 // Copy cpool bytes. | |
1105 // Returns: | |
1106 // 0, in case of OutOfMemoryError | |
1107 // -1, in case of internal error | |
1108 // > 0, count of the raw cpool bytes that have been copied | |
1109 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, | |
1110 SymbolHashMap* tbl, | |
1111 unsigned char *bytes) { | |
1112 u2 idx1, idx2; | |
1113 jint size = 0; | |
1114 jint cnt = length(); | |
1115 unsigned char *start_bytes = bytes; | |
1116 | |
1117 for (jint idx = 1; idx < cnt; idx++) { | |
1118 u1 tag = tag_at(idx).value(); | |
1119 jint ent_size = cpool_entry_size(idx); | |
1120 | |
1121 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
1122 | |
1123 *bytes = tag; | |
1124 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
1125 switch(tag) { | |
1126 case JVM_CONSTANT_Invalid: { | |
1127 DBG(printf("JVM_CONSTANT_Invalid")); | |
1128 break; | |
1129 } | |
1130 case JVM_CONSTANT_Unicode: { | |
1131 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
1132 DBG(printf("JVM_CONSTANT_Unicode")); | |
1133 break; | |
1134 } | |
1135 case JVM_CONSTANT_Utf8: { | |
1136 symbolOop sym = symbol_at(idx); | |
1137 char* str = sym->as_utf8(); | |
1138 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
1139 int len = (int) strlen(str); | |
1140 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
1141 for (int i = 0; i < len; i++) { | |
1142 bytes[3+i] = (u1) str[i]; | |
1143 } | |
1144 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
1145 break; | |
1146 } | |
1147 case JVM_CONSTANT_Integer: { | |
1148 jint val = int_at(idx); | |
1149 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1150 break; | |
1151 } | |
1152 case JVM_CONSTANT_Float: { | |
1153 jfloat val = float_at(idx); | |
1154 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1155 break; | |
1156 } | |
1157 case JVM_CONSTANT_Long: { | |
1158 jlong val = long_at(idx); | |
1159 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1160 idx++; // Long takes two cpool slots | |
1161 break; | |
1162 } | |
1163 case JVM_CONSTANT_Double: { | |
1164 jdouble val = double_at(idx); | |
1165 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1166 idx++; // Double takes two cpool slots | |
1167 break; | |
1168 } | |
1169 case JVM_CONSTANT_Class: | |
1170 case JVM_CONSTANT_UnresolvedClass: | |
1171 case JVM_CONSTANT_UnresolvedClassInError: { | |
1172 *bytes = JVM_CONSTANT_Class; | |
1173 symbolOop sym = klass_name_at(idx); | |
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_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
1178 break; | |
1179 } | |
1180 case JVM_CONSTANT_String: { | |
1181 unsigned int hash; | |
1182 char *str = string_at_noresolve(idx); | |
1183 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); | |
773
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1184 if (sym == NULL) { |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1185 // sym can be NULL if string refers to incorrectly encoded JVM_CONSTANT_Utf8 |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1186 // this can happen with JVM TI; see CR 6839599 for more details |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1187 oop string = *(obj_at_addr(idx)); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1188 assert(java_lang_String::is_instance(string),"Not a String"); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1189 DBG(printf("Error #%03hd tag=%03hd\n", idx, tag)); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1190 idx1 = 0; |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1191 for (int j = 0; j < tbl->table_size() && idx1 == 0; j++) { |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1192 for (SymbolHashMapEntry* cur = tbl->bucket(j); cur != NULL; cur = cur->next()) { |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1193 int length; |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1194 sym = cur->symbol(); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1195 jchar* chars = sym->as_unicode(length); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1196 if (java_lang_String::equals(string, chars, length)) { |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1197 idx1 = cur->value(); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1198 DBG(printf("Index found: %d\n",idx1)); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1199 break; |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1200 } |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1201 } |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1202 } |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1203 } else { |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1204 idx1 = tbl->symbol_to_value(sym); |
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1205 } |
0 | 1206 assert(idx1 != 0, "Have not found a hashtable entry"); |
1207 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1208 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); | |
1209 break; | |
1210 } | |
1211 case JVM_CONSTANT_UnresolvedString: { | |
1212 *bytes = JVM_CONSTANT_String; | |
1213 symbolOop sym = unresolved_string_at(idx); | |
1214 idx1 = tbl->symbol_to_value(sym); | |
1215 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1216 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1217 DBG(char *str = sym->as_utf8()); | |
1218 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); | |
1219 break; | |
1220 } | |
1221 case JVM_CONSTANT_Fieldref: | |
1222 case JVM_CONSTANT_Methodref: | |
1223 case JVM_CONSTANT_InterfaceMethodref: { | |
1224 idx1 = uncached_klass_ref_index_at(idx); | |
1225 idx2 = uncached_name_and_type_ref_index_at(idx); | |
1226 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1227 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1228 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
1229 break; | |
1230 } | |
1231 case JVM_CONSTANT_NameAndType: { | |
1232 idx1 = name_ref_index_at(idx); | |
1233 idx2 = signature_ref_index_at(idx); | |
1234 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1235 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1236 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
1237 break; | |
1238 } | |
1239 case JVM_CONSTANT_ClassIndex: { | |
1240 *bytes = JVM_CONSTANT_Class; | |
1241 idx1 = klass_index_at(idx); | |
1242 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1243 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
1244 break; | |
1245 } | |
1246 case JVM_CONSTANT_StringIndex: { | |
1247 *bytes = JVM_CONSTANT_String; | |
1248 idx1 = string_index_at(idx); | |
1249 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1250 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
1251 break; | |
1252 } | |
1253 } | |
1254 DBG(printf("\n")); | |
1255 bytes += ent_size; | |
1256 size += ent_size; | |
1257 } | |
1258 assert(size == cpool_size, "Size mismatch"); | |
1259 | |
1260 // Keep temorarily for debugging until it's stable. | |
1261 DBG(print_cpool_bytes(cnt, start_bytes)); | |
1262 return (int)(bytes - start_bytes); | |
1263 } /* end copy_cpool_bytes */ | |
1264 | |
1265 | |
1266 void SymbolHashMap::add_entry(symbolOop sym, u2 value) { | |
1267 char *str = sym->as_utf8(); | |
1268 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
1269 unsigned int index = hash % table_size(); | |
1270 | |
1271 // check if already in map | |
1272 // we prefer the first entry since it is more likely to be what was used in | |
1273 // the class file | |
1274 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
1275 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1276 if (en->hash() == hash && en->symbol() == sym) { | |
1277 return; // already there | |
1278 } | |
1279 } | |
1280 | |
1281 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
1282 entry->set_next(bucket(index)); | |
1283 _buckets[index].set_entry(entry); | |
1284 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1285 } | |
1286 | |
1287 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) { | |
1288 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); | |
1289 char *str = sym->as_utf8(); | |
1290 int len = sym->utf8_length(); | |
1291 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
1292 unsigned int index = hash % table_size(); | |
1293 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
1294 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1295 if (en->hash() == hash && en->symbol() == sym) { | |
1296 return en; | |
1297 } | |
1298 } | |
1299 return NULL; | |
1300 } |