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annotate src/share/vm/oops/constantPoolOop.cpp @ 1552:c18cbe5936b8
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Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | 4ce7240d622c |
| children | e9ff18c4ace7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_constantPoolOop.cpp.incl" | |
| 27 | |
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28 void constantPoolOopDesc::set_flag_at(FlagBit fb) { |
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29 const int MAX_STATE_CHANGES = 2; |
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30 for (int i = MAX_STATE_CHANGES + 10; i > 0; i--) { |
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31 int oflags = _flags; |
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32 int nflags = oflags | (1 << (int)fb); |
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33 if (Atomic::cmpxchg(nflags, &_flags, oflags) == oflags) |
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34 return; |
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35 } |
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36 assert(false, "failed to cmpxchg flags"); |
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37 _flags |= (1 << (int)fb); // better than nothing |
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38 } |
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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-> | |
| 1142 | 113 is_a(SystemDictionary::LinkageError_klass())) { |
| 0 | 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 | |
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252 symbolOop constantPoolOopDesc::impl_name_ref_at(int which, bool uncached) { |
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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 | |
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258 symbolOop constantPoolOopDesc::impl_signature_ref_at(int which, bool uncached) { |
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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 | |
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264 int constantPoolOopDesc::impl_name_and_type_ref_index_at(int which, bool uncached) { |
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265 int i = which; |
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266 if (!uncached && cache() != NULL) { |
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267 if (constantPoolCacheOopDesc::is_secondary_index(which)) |
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268 // Invokedynamic indexes are always processed in native order |
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269 // so there is no question of reading a native u2 in Java order here. |
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270 return cache()->main_entry_at(which)->constant_pool_index(); |
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271 // change byte-ordering and go via cache |
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272 i = remap_instruction_operand_from_cache(which); |
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273 } else { |
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274 if (tag_at(which).is_name_and_type()) |
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275 // invokedynamic index is a simple name-and-type |
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276 return which; |
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277 } |
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278 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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279 jint ref_index = *int_at_addr(i); |
| 0 | 280 return extract_high_short_from_int(ref_index); |
| 281 } | |
| 282 | |
| 283 | |
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284 int constantPoolOopDesc::impl_klass_ref_index_at(int which, bool uncached) { |
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285 guarantee(!constantPoolCacheOopDesc::is_secondary_index(which), |
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286 "an invokedynamic instruction does not have a klass"); |
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287 int i = which; |
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288 if (!uncached && cache() != NULL) { |
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289 // change byte-ordering and go via cache |
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290 i = remap_instruction_operand_from_cache(which); |
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291 } |
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292 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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293 jint ref_index = *int_at_addr(i); |
| 0 | 294 return extract_low_short_from_int(ref_index); |
| 295 } | |
| 296 | |
| 297 | |
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298 |
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299 int constantPoolOopDesc::remap_instruction_operand_from_cache(int operand) { |
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300 // Operand was fetched by a stream using get_Java_u2, yet was stored |
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301 // by Rewriter::rewrite_member_reference in native order. |
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302 // So now we have to fix the damage by swapping back to native order. |
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303 assert((int)(u2)operand == operand, "clean u2"); |
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304 int cpc_index = Bytes::swap_u2(operand); |
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305 int member_index = cache()->entry_at(cpc_index)->constant_pool_index(); |
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306 return member_index; |
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307 } |
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308 |
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309 |
| 0 | 310 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
| 311 if (k->oop_is_instance() || k->oop_is_objArray()) { | |
| 312 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
| 313 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); | |
| 314 KlassHandle element (THREAD, elem_oop); | |
| 315 | |
| 316 // The element type could be a typeArray - we only need the access check if it is | |
| 317 // an reference to another class | |
| 318 if (element->oop_is_instance()) { | |
| 319 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
| 320 } | |
| 321 } | |
| 322 } | |
| 323 | |
| 324 | |
|
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325 int constantPoolOopDesc::name_ref_index_at(int which_nt) { |
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326 jint ref_index = name_and_type_at(which_nt); |
| 0 | 327 return extract_low_short_from_int(ref_index); |
| 328 } | |
| 329 | |
| 330 | |
|
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331 int constantPoolOopDesc::signature_ref_index_at(int which_nt) { |
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332 jint ref_index = name_and_type_at(which_nt); |
| 0 | 333 return extract_high_short_from_int(ref_index); |
| 334 } | |
| 335 | |
| 336 | |
| 337 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { | |
| 338 return klass_at(klass_ref_index_at(which), CHECK_NULL); | |
| 339 } | |
| 340 | |
| 341 | |
| 342 symbolOop constantPoolOopDesc::klass_name_at(int which) { | |
| 343 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), | |
| 344 "Corrupted constant pool"); | |
| 345 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
| 346 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
| 347 // tag is not updated atomicly. | |
| 348 oop entry = *(obj_at_addr(which)); | |
| 349 if (entry->is_klass()) { | |
| 350 // Already resolved - return entry's name. | |
| 351 return klassOop(entry)->klass_part()->name(); | |
| 352 } else { | |
| 353 assert(entry->is_symbol(), "must be either symbol or klass"); | |
| 354 return (symbolOop)entry; | |
| 355 } | |
| 356 } | |
| 357 | |
| 358 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) { | |
| 359 jint ref_index = klass_ref_index_at(which); | |
| 360 return klass_at_noresolve(ref_index); | |
| 361 } | |
| 362 | |
| 363 char* constantPoolOopDesc::string_at_noresolve(int which) { | |
| 364 // Test entry type in case string is resolved while in here. | |
| 365 oop entry = *(obj_at_addr(which)); | |
| 366 if (entry->is_symbol()) { | |
| 367 return ((symbolOop)entry)->as_C_string(); | |
|
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368 } else if (java_lang_String::is_instance(entry)) { |
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369 return java_lang_String::as_utf8_string(entry); |
| 0 | 370 } else { |
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371 return (char*)"<pseudo-string>"; |
| 0 | 372 } |
| 373 } | |
| 374 | |
| 375 | |
| 376 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { | |
| 377 return FieldType::basic_type(symbol_at(which)); | |
| 378 } | |
| 379 | |
| 380 | |
| 381 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { | |
| 382 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused | |
| 383 if (this_oop->tag_at(index).is_unresolved_string()) { | |
| 384 this_oop->string_at(index, CHECK); | |
| 385 } | |
| 386 } | |
| 387 } | |
| 388 | |
| 389 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { | |
| 390 oop entry = *(this_oop->obj_at_addr(which)); | |
| 391 if (entry->is_symbol()) { | |
| 392 ObjectLocker ol(this_oop, THREAD); | |
| 393 if (this_oop->tag_at(which).is_unresolved_string()) { | |
| 394 // Intern string | |
| 395 symbolOop sym = this_oop->unresolved_string_at(which); | |
| 396 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); | |
| 397 this_oop->string_at_put(which, entry); | |
| 398 } else { | |
| 399 // Another thread beat us and interned string, read string from constant pool | |
| 400 entry = this_oop->resolved_string_at(which); | |
| 401 } | |
| 402 } | |
| 403 assert(java_lang_String::is_instance(entry), "must be string"); | |
| 404 return entry; | |
| 405 } | |
| 406 | |
| 407 | |
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408 bool constantPoolOopDesc::is_pseudo_string_at(int which) { |
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409 oop entry = *(obj_at_addr(which)); |
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410 if (entry->is_symbol()) |
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411 // Not yet resolved, but it will resolve to a string. |
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412 return false; |
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413 else if (java_lang_String::is_instance(entry)) |
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414 return false; // actually, it might be a non-interned or non-perm string |
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415 else |
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416 // truly pseudo |
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417 return true; |
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418 } |
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419 |
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420 |
| 0 | 421 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, |
| 422 int which) { | |
| 423 // Names are interned, so we can compare symbolOops directly | |
| 424 symbolOop cp_name = klass_name_at(which); | |
| 425 return (cp_name == k->name()); | |
| 426 } | |
| 427 | |
| 428 | |
| 429 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { | |
| 430 ResourceMark rm; | |
| 431 int count = 0; | |
| 432 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused | |
| 433 if (tag_at(index).is_unresolved_string()) { | |
| 434 // Intern string | |
| 435 symbolOop sym = unresolved_string_at(index); | |
| 436 oop entry = StringTable::intern(sym, CHECK_(-1)); | |
| 437 string_at_put(index, entry); | |
| 438 } | |
| 439 } | |
| 440 return count; | |
| 441 } | |
| 442 | |
| 443 | |
| 444 // Iterate over symbols which are used as class, field, method names and | |
| 445 // signatures (in preparation for writing to the shared archive). | |
| 446 | |
| 447 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) { | |
| 448 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
| 449 switch (tag_at(index).value()) { | |
| 450 | |
| 451 case JVM_CONSTANT_UnresolvedClass: | |
| 452 closure->do_oop(obj_at_addr(index)); | |
| 453 break; | |
| 454 | |
| 455 case JVM_CONSTANT_NameAndType: | |
| 456 { | |
| 457 int i = *int_at_addr(index); | |
| 458 closure->do_oop(obj_at_addr((unsigned)i >> 16)); | |
| 459 closure->do_oop(obj_at_addr((unsigned)i & 0xffff)); | |
| 460 } | |
| 461 break; | |
| 462 | |
| 463 case JVM_CONSTANT_Class: | |
| 464 case JVM_CONSTANT_InterfaceMethodref: | |
| 465 case JVM_CONSTANT_Fieldref: | |
| 466 case JVM_CONSTANT_Methodref: | |
| 467 case JVM_CONSTANT_Integer: | |
| 468 case JVM_CONSTANT_Float: | |
| 469 // Do nothing! Not an oop. | |
| 470 // These constant types do not reference symbols at this point. | |
| 471 break; | |
| 472 | |
| 473 case JVM_CONSTANT_String: | |
| 474 // Do nothing! Not a symbol. | |
| 475 break; | |
| 476 | |
| 477 case JVM_CONSTANT_UnresolvedString: | |
| 478 case JVM_CONSTANT_Utf8: | |
| 479 // These constants are symbols, but unless these symbols are | |
| 480 // actually to be used for something, we don't want to mark them. | |
| 481 break; | |
| 482 | |
| 483 case JVM_CONSTANT_Long: | |
| 484 case JVM_CONSTANT_Double: | |
| 485 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 486 ++index; | |
| 487 break; | |
| 488 | |
| 489 default: | |
| 490 ShouldNotReachHere(); | |
| 491 break; | |
| 492 } | |
| 493 } | |
| 494 } | |
| 495 | |
| 496 | |
| 497 // Iterate over the [one] tags array (in preparation for writing to the | |
| 498 // shared archive). | |
| 499 | |
| 500 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { | |
| 501 closure->do_oop(tags_addr()); | |
| 502 } | |
| 503 | |
| 504 | |
| 505 // Iterate over String objects (in preparation for writing to the shared | |
| 506 // archive). | |
| 507 | |
| 508 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { | |
| 509 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
| 510 switch (tag_at(index).value()) { | |
| 511 | |
| 512 case JVM_CONSTANT_UnresolvedClass: | |
| 513 case JVM_CONSTANT_NameAndType: | |
| 514 // Do nothing! Not a String. | |
| 515 break; | |
| 516 | |
| 517 case JVM_CONSTANT_Class: | |
| 518 case JVM_CONSTANT_InterfaceMethodref: | |
| 519 case JVM_CONSTANT_Fieldref: | |
| 520 case JVM_CONSTANT_Methodref: | |
| 521 case JVM_CONSTANT_Integer: | |
| 522 case JVM_CONSTANT_Float: | |
| 523 // Do nothing! Not an oop. | |
| 524 // These constant types do not reference symbols at this point. | |
| 525 break; | |
| 526 | |
| 527 case JVM_CONSTANT_String: | |
| 528 closure->do_oop(obj_at_addr(index)); | |
| 529 break; | |
| 530 | |
| 531 case JVM_CONSTANT_UnresolvedString: | |
| 532 case JVM_CONSTANT_Utf8: | |
| 533 // These constants are symbols, but unless these symbols are | |
| 534 // actually to be used for something, we don't want to mark them. | |
| 535 break; | |
| 536 | |
| 537 case JVM_CONSTANT_Long: | |
| 538 case JVM_CONSTANT_Double: | |
| 539 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 540 ++index; | |
| 541 break; | |
| 542 | |
| 543 default: | |
| 544 ShouldNotReachHere(); | |
| 545 break; | |
| 546 } | |
| 547 } | |
| 548 } | |
| 549 | |
| 550 | |
| 551 // Compare this constant pool's entry at index1 to the constant pool | |
| 552 // cp2's entry at index2. | |
| 553 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, | |
| 554 int index2, TRAPS) { | |
| 555 | |
| 556 jbyte t1 = tag_at(index1).value(); | |
| 557 jbyte t2 = cp2->tag_at(index2).value(); | |
| 558 | |
| 559 | |
| 560 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
| 561 // when comparing | |
| 562 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 563 t1 = JVM_CONSTANT_UnresolvedClass; | |
| 564 } | |
| 565 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 566 t2 = JVM_CONSTANT_UnresolvedClass; | |
| 567 } | |
| 568 | |
| 569 if (t1 != t2) { | |
| 570 // Not the same entry type so there is nothing else to check. Note | |
| 571 // that this style of checking will consider resolved/unresolved | |
| 572 // class pairs and resolved/unresolved string pairs as different. | |
| 573 // From the constantPoolOop API point of view, this is correct | |
| 574 // behavior. See constantPoolKlass::merge() to see how this plays | |
| 575 // out in the context of constantPoolOop merging. | |
| 576 return false; | |
| 577 } | |
| 578 | |
| 579 switch (t1) { | |
| 580 case JVM_CONSTANT_Class: | |
| 581 { | |
| 582 klassOop k1 = klass_at(index1, CHECK_false); | |
| 583 klassOop k2 = cp2->klass_at(index2, CHECK_false); | |
| 584 if (k1 == k2) { | |
| 585 return true; | |
| 586 } | |
| 587 } break; | |
| 588 | |
| 589 case JVM_CONSTANT_ClassIndex: | |
| 590 { | |
| 591 int recur1 = klass_index_at(index1); | |
| 592 int recur2 = cp2->klass_index_at(index2); | |
| 593 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 594 if (match) { | |
| 595 return true; | |
| 596 } | |
| 597 } break; | |
| 598 | |
| 599 case JVM_CONSTANT_Double: | |
| 600 { | |
| 601 jdouble d1 = double_at(index1); | |
| 602 jdouble d2 = cp2->double_at(index2); | |
| 603 if (d1 == d2) { | |
| 604 return true; | |
| 605 } | |
| 606 } break; | |
| 607 | |
| 608 case JVM_CONSTANT_Fieldref: | |
| 609 case JVM_CONSTANT_InterfaceMethodref: | |
| 610 case JVM_CONSTANT_Methodref: | |
| 611 { | |
| 612 int recur1 = uncached_klass_ref_index_at(index1); | |
| 613 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
| 614 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 615 if (match) { | |
| 616 recur1 = uncached_name_and_type_ref_index_at(index1); | |
| 617 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
| 618 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 619 if (match) { | |
| 620 return true; | |
| 621 } | |
| 622 } | |
| 623 } break; | |
| 624 | |
| 625 case JVM_CONSTANT_Float: | |
| 626 { | |
| 627 jfloat f1 = float_at(index1); | |
| 628 jfloat f2 = cp2->float_at(index2); | |
| 629 if (f1 == f2) { | |
| 630 return true; | |
| 631 } | |
| 632 } break; | |
| 633 | |
| 634 case JVM_CONSTANT_Integer: | |
| 635 { | |
| 636 jint i1 = int_at(index1); | |
| 637 jint i2 = cp2->int_at(index2); | |
| 638 if (i1 == i2) { | |
| 639 return true; | |
| 640 } | |
| 641 } break; | |
| 642 | |
| 643 case JVM_CONSTANT_Long: | |
| 644 { | |
| 645 jlong l1 = long_at(index1); | |
| 646 jlong l2 = cp2->long_at(index2); | |
| 647 if (l1 == l2) { | |
| 648 return true; | |
| 649 } | |
| 650 } break; | |
| 651 | |
| 652 case JVM_CONSTANT_NameAndType: | |
| 653 { | |
| 654 int recur1 = name_ref_index_at(index1); | |
| 655 int recur2 = cp2->name_ref_index_at(index2); | |
| 656 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 657 if (match) { | |
| 658 recur1 = signature_ref_index_at(index1); | |
| 659 recur2 = cp2->signature_ref_index_at(index2); | |
| 660 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 661 if (match) { | |
| 662 return true; | |
| 663 } | |
| 664 } | |
| 665 } break; | |
| 666 | |
| 667 case JVM_CONSTANT_String: | |
| 668 { | |
| 669 oop s1 = string_at(index1, CHECK_false); | |
| 670 oop s2 = cp2->string_at(index2, CHECK_false); | |
| 671 if (s1 == s2) { | |
| 672 return true; | |
| 673 } | |
| 674 } break; | |
| 675 | |
| 676 case JVM_CONSTANT_StringIndex: | |
| 677 { | |
| 678 int recur1 = string_index_at(index1); | |
| 679 int recur2 = cp2->string_index_at(index2); | |
| 680 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 681 if (match) { | |
| 682 return true; | |
| 683 } | |
| 684 } break; | |
| 685 | |
| 686 case JVM_CONSTANT_UnresolvedClass: | |
| 687 { | |
| 688 symbolOop k1 = unresolved_klass_at(index1); | |
| 689 symbolOop k2 = cp2->unresolved_klass_at(index2); | |
| 690 if (k1 == k2) { | |
| 691 return true; | |
| 692 } | |
| 693 } break; | |
| 694 | |
| 695 case JVM_CONSTANT_UnresolvedString: | |
| 696 { | |
| 697 symbolOop s1 = unresolved_string_at(index1); | |
| 698 symbolOop s2 = cp2->unresolved_string_at(index2); | |
| 699 if (s1 == s2) { | |
| 700 return true; | |
| 701 } | |
| 702 } break; | |
| 703 | |
| 704 case JVM_CONSTANT_Utf8: | |
| 705 { | |
| 706 symbolOop s1 = symbol_at(index1); | |
| 707 symbolOop s2 = cp2->symbol_at(index2); | |
| 708 if (s1 == s2) { | |
| 709 return true; | |
| 710 } | |
| 711 } break; | |
| 712 | |
| 713 // Invalid is used as the tag for the second constant pool entry | |
| 714 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 715 // not be seen by itself. | |
| 716 case JVM_CONSTANT_Invalid: // fall through | |
| 717 | |
| 718 default: | |
| 719 ShouldNotReachHere(); | |
| 720 break; | |
| 721 } | |
| 722 | |
| 723 return false; | |
| 724 } // end compare_entry_to() | |
| 725 | |
| 726 | |
| 727 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
| 728 // to the constant pool to_cp's entries starting at to_i. A total of | |
| 729 // (end_i - start_i) + 1 entries are copied. | |
| 730 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i, | |
| 731 constantPoolHandle to_cp, int to_i, TRAPS) { | |
| 732 | |
| 733 int dest_i = to_i; // leave original alone for debug purposes | |
| 734 | |
| 735 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { | |
| 736 copy_entry_to(src_i, to_cp, dest_i, CHECK); | |
| 737 | |
| 738 switch (tag_at(src_i).value()) { | |
| 739 case JVM_CONSTANT_Double: | |
| 740 case JVM_CONSTANT_Long: | |
| 741 // double and long take two constant pool entries | |
| 742 src_i += 2; | |
| 743 dest_i += 2; | |
| 744 break; | |
| 745 | |
| 746 default: | |
| 747 // all others take one constant pool entry | |
| 748 src_i++; | |
| 749 dest_i++; | |
| 750 break; | |
| 751 } | |
| 752 } | |
| 753 } // end copy_cp_to() | |
| 754 | |
| 755 | |
| 756 // Copy this constant pool's entry at from_i to the constant pool | |
| 757 // to_cp's entry at to_i. | |
| 758 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp, | |
| 759 int to_i, TRAPS) { | |
| 760 | |
| 761 switch (tag_at(from_i).value()) { | |
| 762 case JVM_CONSTANT_Class: | |
| 763 { | |
| 764 klassOop k = klass_at(from_i, CHECK); | |
| 765 to_cp->klass_at_put(to_i, k); | |
| 766 } break; | |
| 767 | |
| 768 case JVM_CONSTANT_ClassIndex: | |
| 769 { | |
| 770 jint ki = klass_index_at(from_i); | |
| 771 to_cp->klass_index_at_put(to_i, ki); | |
| 772 } break; | |
| 773 | |
| 774 case JVM_CONSTANT_Double: | |
| 775 { | |
| 776 jdouble d = double_at(from_i); | |
| 777 to_cp->double_at_put(to_i, d); | |
| 778 // double takes two constant pool entries so init second entry's tag | |
| 779 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 780 } break; | |
| 781 | |
| 782 case JVM_CONSTANT_Fieldref: | |
| 783 { | |
| 784 int class_index = uncached_klass_ref_index_at(from_i); | |
| 785 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 786 to_cp->field_at_put(to_i, class_index, name_and_type_index); | |
| 787 } break; | |
| 788 | |
| 789 case JVM_CONSTANT_Float: | |
| 790 { | |
| 791 jfloat f = float_at(from_i); | |
| 792 to_cp->float_at_put(to_i, f); | |
| 793 } break; | |
| 794 | |
| 795 case JVM_CONSTANT_Integer: | |
| 796 { | |
| 797 jint i = int_at(from_i); | |
| 798 to_cp->int_at_put(to_i, i); | |
| 799 } break; | |
| 800 | |
| 801 case JVM_CONSTANT_InterfaceMethodref: | |
| 802 { | |
| 803 int class_index = uncached_klass_ref_index_at(from_i); | |
| 804 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 805 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); | |
| 806 } break; | |
| 807 | |
| 808 case JVM_CONSTANT_Long: | |
| 809 { | |
| 810 jlong l = long_at(from_i); | |
| 811 to_cp->long_at_put(to_i, l); | |
| 812 // long takes two constant pool entries so init second entry's tag | |
| 813 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 814 } break; | |
| 815 | |
| 816 case JVM_CONSTANT_Methodref: | |
| 817 { | |
| 818 int class_index = uncached_klass_ref_index_at(from_i); | |
| 819 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 820 to_cp->method_at_put(to_i, class_index, name_and_type_index); | |
| 821 } break; | |
| 822 | |
| 823 case JVM_CONSTANT_NameAndType: | |
| 824 { | |
| 825 int name_ref_index = name_ref_index_at(from_i); | |
| 826 int signature_ref_index = signature_ref_index_at(from_i); | |
| 827 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); | |
| 828 } break; | |
| 829 | |
| 830 case JVM_CONSTANT_String: | |
| 831 { | |
| 832 oop s = string_at(from_i, CHECK); | |
| 833 to_cp->string_at_put(to_i, s); | |
| 834 } break; | |
| 835 | |
| 836 case JVM_CONSTANT_StringIndex: | |
| 837 { | |
| 838 jint si = string_index_at(from_i); | |
| 839 to_cp->string_index_at_put(to_i, si); | |
| 840 } break; | |
| 841 | |
| 842 case JVM_CONSTANT_UnresolvedClass: | |
| 843 { | |
| 844 symbolOop k = unresolved_klass_at(from_i); | |
| 845 to_cp->unresolved_klass_at_put(to_i, k); | |
| 846 } break; | |
| 847 | |
| 848 case JVM_CONSTANT_UnresolvedClassInError: | |
| 849 { | |
| 850 symbolOop k = unresolved_klass_at(from_i); | |
| 851 to_cp->unresolved_klass_at_put(to_i, k); | |
| 852 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
| 853 } break; | |
| 854 | |
| 855 | |
| 856 case JVM_CONSTANT_UnresolvedString: | |
| 857 { | |
| 858 symbolOop s = unresolved_string_at(from_i); | |
| 859 to_cp->unresolved_string_at_put(to_i, s); | |
| 860 } break; | |
| 861 | |
| 862 case JVM_CONSTANT_Utf8: | |
| 863 { | |
| 864 symbolOop s = symbol_at(from_i); | |
| 865 to_cp->symbol_at_put(to_i, s); | |
| 866 } break; | |
| 867 | |
| 868 // Invalid is used as the tag for the second constant pool entry | |
| 869 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 870 // not be seen by itself. | |
| 871 case JVM_CONSTANT_Invalid: // fall through | |
| 872 | |
| 873 default: | |
| 874 { | |
| 875 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb | |
| 876 ShouldNotReachHere(); | |
| 877 } break; | |
| 878 } | |
| 879 } // end copy_entry_to() | |
| 880 | |
| 881 | |
| 882 // Search constant pool search_cp for an entry that matches this | |
| 883 // constant pool's entry at pattern_i. Returns the index of a | |
| 884 // matching entry or zero (0) if there is no matching entry. | |
| 885 int constantPoolOopDesc::find_matching_entry(int pattern_i, | |
| 886 constantPoolHandle search_cp, TRAPS) { | |
| 887 | |
| 888 // index zero (0) is not used | |
| 889 for (int i = 1; i < search_cp->length(); i++) { | |
| 890 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
| 891 if (found) { | |
| 892 return i; | |
| 893 } | |
| 894 } | |
| 895 | |
| 896 return 0; // entry not found; return unused index zero (0) | |
| 897 } // end find_matching_entry() | |
| 898 | |
| 899 | |
| 900 #ifndef PRODUCT | |
| 901 | |
| 902 const char* constantPoolOopDesc::printable_name_at(int which) { | |
| 903 | |
| 904 constantTag tag = tag_at(which); | |
| 905 | |
| 906 if (tag.is_unresolved_string() || tag.is_string()) { | |
| 907 return string_at_noresolve(which); | |
| 908 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
| 909 return klass_name_at(which)->as_C_string(); | |
| 910 } else if (tag.is_symbol()) { | |
| 911 return symbol_at(which)->as_C_string(); | |
| 912 } | |
| 913 return ""; | |
| 914 } | |
| 915 | |
| 916 #endif // PRODUCT | |
| 917 | |
| 918 | |
| 919 // JVMTI GetConstantPool support | |
| 920 | |
| 921 // For temporary use until code is stable. | |
| 922 #define DBG(code) | |
| 923 | |
| 924 static const char* WARN_MSG = "Must not be such entry!"; | |
| 925 | |
| 926 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
| 927 jint size = 0; | |
| 928 u2 idx1, idx2; | |
| 929 | |
| 930 for (jint idx = 1; idx < cnt; idx++) { | |
| 931 jint ent_size = 0; | |
| 932 u1 tag = *bytes++; | |
| 933 size++; // count tag | |
| 934 | |
| 935 printf("const #%03d, tag: %02d ", idx, tag); | |
| 936 switch(tag) { | |
| 937 case JVM_CONSTANT_Invalid: { | |
| 938 printf("Invalid"); | |
| 939 break; | |
| 940 } | |
| 941 case JVM_CONSTANT_Unicode: { | |
| 942 printf("Unicode %s", WARN_MSG); | |
| 943 break; | |
| 944 } | |
| 945 case JVM_CONSTANT_Utf8: { | |
| 946 u2 len = Bytes::get_Java_u2(bytes); | |
| 947 char str[128]; | |
| 948 if (len > 127) { | |
| 949 len = 127; | |
| 950 } | |
| 951 strncpy(str, (char *) (bytes+2), len); | |
| 952 str[len] = '\0'; | |
| 953 printf("Utf8 \"%s\"", str); | |
| 954 ent_size = 2 + len; | |
| 955 break; | |
| 956 } | |
| 957 case JVM_CONSTANT_Integer: { | |
| 958 u4 val = Bytes::get_Java_u4(bytes); | |
| 959 printf("int %d", *(int *) &val); | |
| 960 ent_size = 4; | |
| 961 break; | |
| 962 } | |
| 963 case JVM_CONSTANT_Float: { | |
| 964 u4 val = Bytes::get_Java_u4(bytes); | |
| 965 printf("float %5.3ff", *(float *) &val); | |
| 966 ent_size = 4; | |
| 967 break; | |
| 968 } | |
| 969 case JVM_CONSTANT_Long: { | |
| 970 u8 val = Bytes::get_Java_u8(bytes); | |
|
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971 printf("long "INT64_FORMAT, *(jlong *) &val); |
| 0 | 972 ent_size = 8; |
| 973 idx++; // Long takes two cpool slots | |
| 974 break; | |
| 975 } | |
| 976 case JVM_CONSTANT_Double: { | |
| 977 u8 val = Bytes::get_Java_u8(bytes); | |
| 978 printf("double %5.3fd", *(jdouble *)&val); | |
| 979 ent_size = 8; | |
| 980 idx++; // Double takes two cpool slots | |
| 981 break; | |
| 982 } | |
| 983 case JVM_CONSTANT_Class: { | |
| 984 idx1 = Bytes::get_Java_u2(bytes); | |
| 985 printf("class #%03d", idx1); | |
| 986 ent_size = 2; | |
| 987 break; | |
| 988 } | |
| 989 case JVM_CONSTANT_String: { | |
| 990 idx1 = Bytes::get_Java_u2(bytes); | |
| 991 printf("String #%03d", idx1); | |
| 992 ent_size = 2; | |
| 993 break; | |
| 994 } | |
| 995 case JVM_CONSTANT_Fieldref: { | |
| 996 idx1 = Bytes::get_Java_u2(bytes); | |
| 997 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 998 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
| 999 ent_size = 4; | |
| 1000 break; | |
| 1001 } | |
| 1002 case JVM_CONSTANT_Methodref: { | |
| 1003 idx1 = Bytes::get_Java_u2(bytes); | |
| 1004 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1005 printf("Method #%03d, #%03d", idx1, idx2); | |
| 1006 ent_size = 4; | |
| 1007 break; | |
| 1008 } | |
| 1009 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1010 idx1 = Bytes::get_Java_u2(bytes); | |
| 1011 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1012 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
| 1013 ent_size = 4; | |
| 1014 break; | |
| 1015 } | |
| 1016 case JVM_CONSTANT_NameAndType: { | |
| 1017 idx1 = Bytes::get_Java_u2(bytes); | |
| 1018 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1019 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
| 1020 ent_size = 4; | |
| 1021 break; | |
| 1022 } | |
| 1023 case JVM_CONSTANT_ClassIndex: { | |
| 1024 printf("ClassIndex %s", WARN_MSG); | |
| 1025 break; | |
| 1026 } | |
| 1027 case JVM_CONSTANT_UnresolvedClass: { | |
| 1028 printf("UnresolvedClass: %s", WARN_MSG); | |
| 1029 break; | |
| 1030 } | |
| 1031 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1032 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
| 1033 break; | |
| 1034 } | |
| 1035 case JVM_CONSTANT_StringIndex: { | |
| 1036 printf("StringIndex: %s", WARN_MSG); | |
| 1037 break; | |
| 1038 } | |
| 1039 case JVM_CONSTANT_UnresolvedString: { | |
| 1040 printf("UnresolvedString: %s", WARN_MSG); | |
| 1041 break; | |
| 1042 } | |
| 1043 } | |
| 1044 printf(";\n"); | |
| 1045 bytes += ent_size; | |
| 1046 size += ent_size; | |
| 1047 } | |
| 1048 printf("Cpool size: %d\n", size); | |
| 1049 fflush(0); | |
| 1050 return; | |
| 1051 } /* end print_cpool_bytes */ | |
| 1052 | |
| 1053 | |
| 1054 // Returns size of constant pool entry. | |
| 1055 jint constantPoolOopDesc::cpool_entry_size(jint idx) { | |
| 1056 switch(tag_at(idx).value()) { | |
| 1057 case JVM_CONSTANT_Invalid: | |
| 1058 case JVM_CONSTANT_Unicode: | |
| 1059 return 1; | |
| 1060 | |
| 1061 case JVM_CONSTANT_Utf8: | |
| 1062 return 3 + symbol_at(idx)->utf8_length(); | |
| 1063 | |
| 1064 case JVM_CONSTANT_Class: | |
| 1065 case JVM_CONSTANT_String: | |
| 1066 case JVM_CONSTANT_ClassIndex: | |
| 1067 case JVM_CONSTANT_UnresolvedClass: | |
| 1068 case JVM_CONSTANT_UnresolvedClassInError: | |
| 1069 case JVM_CONSTANT_StringIndex: | |
| 1070 case JVM_CONSTANT_UnresolvedString: | |
| 1071 return 3; | |
| 1072 | |
| 1073 case JVM_CONSTANT_Integer: | |
| 1074 case JVM_CONSTANT_Float: | |
| 1075 case JVM_CONSTANT_Fieldref: | |
| 1076 case JVM_CONSTANT_Methodref: | |
| 1077 case JVM_CONSTANT_InterfaceMethodref: | |
| 1078 case JVM_CONSTANT_NameAndType: | |
| 1079 return 5; | |
| 1080 | |
| 1081 case JVM_CONSTANT_Long: | |
| 1082 case JVM_CONSTANT_Double: | |
| 1083 return 9; | |
| 1084 } | |
| 1085 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
| 1086 return 1; | |
| 1087 } /* end cpool_entry_size */ | |
| 1088 | |
| 1089 | |
| 1090 // SymbolHashMap is used to find a constant pool index from a string. | |
| 1091 // This function fills in SymbolHashMaps, one for utf8s and one for | |
| 1092 // class names, returns size of the cpool raw bytes. | |
| 1093 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, | |
| 1094 SymbolHashMap *classmap) { | |
| 1095 jint size = 0; | |
| 1096 | |
| 1097 for (u2 idx = 1; idx < length(); idx++) { | |
| 1098 u2 tag = tag_at(idx).value(); | |
| 1099 size += cpool_entry_size(idx); | |
| 1100 | |
| 1101 switch(tag) { | |
| 1102 case JVM_CONSTANT_Utf8: { | |
| 1103 symbolOop sym = symbol_at(idx); | |
| 1104 symmap->add_entry(sym, idx); | |
| 1105 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1106 break; | |
| 1107 } | |
| 1108 case JVM_CONSTANT_Class: | |
| 1109 case JVM_CONSTANT_UnresolvedClass: | |
| 1110 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1111 symbolOop sym = klass_name_at(idx); | |
| 1112 classmap->add_entry(sym, idx); | |
| 1113 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1114 break; | |
| 1115 } | |
| 1116 case JVM_CONSTANT_Long: | |
| 1117 case JVM_CONSTANT_Double: { | |
| 1118 idx++; // Both Long and Double take two cpool slots | |
| 1119 break; | |
| 1120 } | |
| 1121 } | |
| 1122 } | |
| 1123 return size; | |
| 1124 } /* end hash_utf8_entries_to */ | |
| 1125 | |
| 1126 | |
| 1127 // Copy cpool bytes. | |
| 1128 // Returns: | |
| 1129 // 0, in case of OutOfMemoryError | |
| 1130 // -1, in case of internal error | |
| 1131 // > 0, count of the raw cpool bytes that have been copied | |
| 1132 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, | |
| 1133 SymbolHashMap* tbl, | |
| 1134 unsigned char *bytes) { | |
| 1135 u2 idx1, idx2; | |
| 1136 jint size = 0; | |
| 1137 jint cnt = length(); | |
| 1138 unsigned char *start_bytes = bytes; | |
| 1139 | |
| 1140 for (jint idx = 1; idx < cnt; idx++) { | |
| 1141 u1 tag = tag_at(idx).value(); | |
| 1142 jint ent_size = cpool_entry_size(idx); | |
| 1143 | |
| 1144 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
| 1145 | |
| 1146 *bytes = tag; | |
| 1147 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
| 1148 switch(tag) { | |
| 1149 case JVM_CONSTANT_Invalid: { | |
| 1150 DBG(printf("JVM_CONSTANT_Invalid")); | |
| 1151 break; | |
| 1152 } | |
| 1153 case JVM_CONSTANT_Unicode: { | |
| 1154 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
| 1155 DBG(printf("JVM_CONSTANT_Unicode")); | |
| 1156 break; | |
| 1157 } | |
| 1158 case JVM_CONSTANT_Utf8: { | |
| 1159 symbolOop sym = symbol_at(idx); | |
| 1160 char* str = sym->as_utf8(); | |
| 1161 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
| 1162 int len = (int) strlen(str); | |
| 1163 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
| 1164 for (int i = 0; i < len; i++) { | |
| 1165 bytes[3+i] = (u1) str[i]; | |
| 1166 } | |
| 1167 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
| 1168 break; | |
| 1169 } | |
| 1170 case JVM_CONSTANT_Integer: { | |
| 1171 jint val = int_at(idx); | |
| 1172 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1173 break; | |
| 1174 } | |
| 1175 case JVM_CONSTANT_Float: { | |
| 1176 jfloat val = float_at(idx); | |
| 1177 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1178 break; | |
| 1179 } | |
| 1180 case JVM_CONSTANT_Long: { | |
| 1181 jlong val = long_at(idx); | |
| 1182 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1183 idx++; // Long takes two cpool slots | |
| 1184 break; | |
| 1185 } | |
| 1186 case JVM_CONSTANT_Double: { | |
| 1187 jdouble val = double_at(idx); | |
| 1188 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1189 idx++; // Double takes two cpool slots | |
| 1190 break; | |
| 1191 } | |
| 1192 case JVM_CONSTANT_Class: | |
| 1193 case JVM_CONSTANT_UnresolvedClass: | |
| 1194 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1195 *bytes = JVM_CONSTANT_Class; | |
| 1196 symbolOop sym = klass_name_at(idx); | |
| 1197 idx1 = tbl->symbol_to_value(sym); | |
| 1198 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1199 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1200 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
| 1201 break; | |
| 1202 } | |
| 1203 case JVM_CONSTANT_String: { | |
| 1204 unsigned int hash; | |
| 1205 char *str = string_at_noresolve(idx); | |
| 1206 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); | |
|
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1207 if (sym == NULL) { |
|
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|
1208 // sym can be NULL if string refers to incorrectly encoded JVM_CONSTANT_Utf8 |
|
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diff
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1209 // this can happen with JVM TI; see CR 6839599 for more details |
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diff
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1210 oop string = *(obj_at_addr(idx)); |
|
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1211 assert(java_lang_String::is_instance(string),"Not a String"); |
|
47ffceb239d0
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1212 DBG(printf("Error #%03hd tag=%03hd\n", idx, tag)); |
|
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diff
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|
1213 idx1 = 0; |
|
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|
1214 for (int j = 0; j < tbl->table_size() && idx1 == 0; j++) { |
|
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1215 for (SymbolHashMapEntry* cur = tbl->bucket(j); cur != NULL; cur = cur->next()) { |
|
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1216 int length; |
|
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1217 sym = cur->symbol(); |
|
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1218 jchar* chars = sym->as_unicode(length); |
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|
1219 if (java_lang_String::equals(string, chars, length)) { |
|
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1220 idx1 = cur->value(); |
|
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1221 DBG(printf("Index found: %d\n",idx1)); |
|
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1222 break; |
|
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|
1223 } |
|
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|
1224 } |
|
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|
1225 } |
|
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|
1226 } else { |
|
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1227 idx1 = tbl->symbol_to_value(sym); |
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|
1228 } |
| 0 | 1229 assert(idx1 != 0, "Have not found a hashtable entry"); |
| 1230 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1231 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); | |
| 1232 break; | |
| 1233 } | |
| 1234 case JVM_CONSTANT_UnresolvedString: { | |
| 1235 *bytes = JVM_CONSTANT_String; | |
| 1236 symbolOop sym = unresolved_string_at(idx); | |
| 1237 idx1 = tbl->symbol_to_value(sym); | |
| 1238 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1239 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1240 DBG(char *str = sym->as_utf8()); | |
| 1241 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); | |
| 1242 break; | |
| 1243 } | |
| 1244 case JVM_CONSTANT_Fieldref: | |
| 1245 case JVM_CONSTANT_Methodref: | |
| 1246 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1247 idx1 = uncached_klass_ref_index_at(idx); | |
| 1248 idx2 = uncached_name_and_type_ref_index_at(idx); | |
| 1249 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1250 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1251 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
| 1252 break; | |
| 1253 } | |
| 1254 case JVM_CONSTANT_NameAndType: { | |
| 1255 idx1 = name_ref_index_at(idx); | |
| 1256 idx2 = signature_ref_index_at(idx); | |
| 1257 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1258 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1259 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
| 1260 break; | |
| 1261 } | |
| 1262 case JVM_CONSTANT_ClassIndex: { | |
| 1263 *bytes = JVM_CONSTANT_Class; | |
| 1264 idx1 = klass_index_at(idx); | |
| 1265 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1266 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
| 1267 break; | |
| 1268 } | |
| 1269 case JVM_CONSTANT_StringIndex: { | |
| 1270 *bytes = JVM_CONSTANT_String; | |
| 1271 idx1 = string_index_at(idx); | |
| 1272 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1273 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
| 1274 break; | |
| 1275 } | |
| 1276 } | |
| 1277 DBG(printf("\n")); | |
| 1278 bytes += ent_size; | |
| 1279 size += ent_size; | |
| 1280 } | |
| 1281 assert(size == cpool_size, "Size mismatch"); | |
| 1282 | |
| 1283 // Keep temorarily for debugging until it's stable. | |
| 1284 DBG(print_cpool_bytes(cnt, start_bytes)); | |
| 1285 return (int)(bytes - start_bytes); | |
| 1286 } /* end copy_cpool_bytes */ | |
| 1287 | |
| 1288 | |
| 1289 void SymbolHashMap::add_entry(symbolOop sym, u2 value) { | |
| 1290 char *str = sym->as_utf8(); | |
| 1291 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
| 1292 unsigned int index = hash % table_size(); | |
| 1293 | |
| 1294 // check if already in map | |
| 1295 // we prefer the first entry since it is more likely to be what was used in | |
| 1296 // the class file | |
| 1297 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1298 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1299 if (en->hash() == hash && en->symbol() == sym) { | |
| 1300 return; // already there | |
| 1301 } | |
| 1302 } | |
| 1303 | |
| 1304 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
| 1305 entry->set_next(bucket(index)); | |
| 1306 _buckets[index].set_entry(entry); | |
| 1307 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1308 } | |
| 1309 | |
| 1310 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) { | |
| 1311 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); | |
| 1312 char *str = sym->as_utf8(); | |
| 1313 int len = sym->utf8_length(); | |
| 1314 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
| 1315 unsigned int index = hash % table_size(); | |
| 1316 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1317 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1318 if (en->hash() == hash && en->symbol() == sym) { | |
| 1319 return en; | |
| 1320 } | |
| 1321 } | |
| 1322 return NULL; | |
| 1323 } |