Mercurial > hg > truffle
annotate src/share/vm/oops/constantPoolOop.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | 3b2dea75431e |
| children | dad31fc330cd |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1579 | 2 * Copyright (c) 1997, 2010, 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 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "classfile/symbolTable.hpp" | |
| 28 #include "classfile/systemDictionary.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "interpreter/linkResolver.hpp" | |
| 31 #include "memory/oopFactory.hpp" | |
| 32 #include "memory/universe.inline.hpp" | |
| 33 #include "oops/constantPoolOop.hpp" | |
| 34 #include "oops/instanceKlass.hpp" | |
| 35 #include "oops/objArrayKlass.hpp" | |
| 36 #include "oops/oop.inline.hpp" | |
| 37 #include "runtime/fieldType.hpp" | |
| 38 #include "runtime/init.hpp" | |
| 39 #include "runtime/signature.hpp" | |
| 40 #include "runtime/vframe.hpp" | |
| 0 | 41 |
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42 void constantPoolOopDesc::set_flag_at(FlagBit fb) { |
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43 const int MAX_STATE_CHANGES = 2; |
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44 for (int i = MAX_STATE_CHANGES + 10; i > 0; i--) { |
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45 int oflags = _flags; |
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46 int nflags = oflags | (1 << (int)fb); |
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47 if (Atomic::cmpxchg(nflags, &_flags, oflags) == oflags) |
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48 return; |
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49 } |
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50 assert(false, "failed to cmpxchg flags"); |
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51 _flags |= (1 << (int)fb); // better than nothing |
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52 } |
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53 |
| 0 | 54 klassOop constantPoolOopDesc::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
| 55 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
| 56 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
| 57 // tag is not updated atomicly. | |
| 58 oop entry = *(this_oop->obj_at_addr(which)); | |
| 59 if (entry->is_klass()) { | |
| 60 // Already resolved - return entry. | |
| 61 return (klassOop)entry; | |
| 62 } | |
| 63 | |
| 64 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object | |
| 65 // already has updated the object | |
| 66 assert(THREAD->is_Java_thread(), "must be a Java thread"); | |
| 67 bool do_resolve = false; | |
| 68 bool in_error = false; | |
| 69 | |
| 70 symbolHandle name; | |
| 71 Handle loader; | |
| 72 { ObjectLocker ol(this_oop, THREAD); | |
| 73 | |
| 74 if (this_oop->tag_at(which).is_unresolved_klass()) { | |
| 75 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
| 76 in_error = true; | |
| 77 } else { | |
| 78 do_resolve = true; | |
| 79 name = symbolHandle(THREAD, this_oop->unresolved_klass_at(which)); | |
| 80 loader = Handle(THREAD, instanceKlass::cast(this_oop->pool_holder())->class_loader()); | |
| 81 } | |
| 82 } | |
| 83 } // unlocking constantPool | |
| 84 | |
| 85 | |
| 86 // The original attempt to resolve this constant pool entry failed so find the | |
| 87 // original error and throw it again (JVMS 5.4.3). | |
| 88 if (in_error) { | |
| 89 symbolOop error = SystemDictionary::find_resolution_error(this_oop, which); | |
| 90 guarantee(error != (symbolOop)NULL, "tag mismatch with resolution error table"); | |
| 91 ResourceMark rm; | |
| 92 // exception text will be the class name | |
| 93 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
| 94 THROW_MSG_0(error, className); | |
| 95 } | |
| 96 | |
| 97 if (do_resolve) { | |
| 98 // this_oop must be unlocked during resolve_or_fail | |
| 99 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 100 Handle h_prot (THREAD, protection_domain); | |
| 101 klassOop k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); | |
| 102 KlassHandle k; | |
| 103 if (!HAS_PENDING_EXCEPTION) { | |
| 104 k = KlassHandle(THREAD, k_oop); | |
| 105 // Do access check for klasses | |
| 106 verify_constant_pool_resolve(this_oop, k, THREAD); | |
| 107 } | |
| 108 | |
| 109 // Failed to resolve class. We must record the errors so that subsequent attempts | |
| 110 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). | |
| 111 if (HAS_PENDING_EXCEPTION) { | |
| 112 ResourceMark rm; | |
| 113 symbolHandle error(PENDING_EXCEPTION->klass()->klass_part()->name()); | |
| 114 | |
| 115 bool throw_orig_error = false; | |
| 116 { | |
| 117 ObjectLocker ol (this_oop, THREAD); | |
| 118 | |
| 119 // some other thread has beaten us and has resolved the class. | |
| 120 if (this_oop->tag_at(which).is_klass()) { | |
| 121 CLEAR_PENDING_EXCEPTION; | |
| 122 entry = this_oop->resolved_klass_at(which); | |
| 123 return (klassOop)entry; | |
| 124 } | |
| 125 | |
| 126 if (!PENDING_EXCEPTION-> | |
| 1142 | 127 is_a(SystemDictionary::LinkageError_klass())) { |
| 0 | 128 // Just throw the exception and don't prevent these classes from |
| 129 // being loaded due to virtual machine errors like StackOverflow | |
| 130 // and OutOfMemoryError, etc, or if the thread was hit by stop() | |
| 131 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) | |
| 132 } | |
| 133 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
| 134 SystemDictionary::add_resolution_error(this_oop, which, error); | |
| 135 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); | |
| 136 } else { | |
| 137 // some other thread has put the class in error state. | |
| 138 error = symbolHandle(SystemDictionary::find_resolution_error(this_oop, which)); | |
| 139 assert(!error.is_null(), "checking"); | |
| 140 throw_orig_error = true; | |
| 141 } | |
| 142 } // unlocked | |
| 143 | |
| 144 if (throw_orig_error) { | |
| 145 CLEAR_PENDING_EXCEPTION; | |
| 146 ResourceMark rm; | |
| 147 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
| 148 THROW_MSG_0(error, className); | |
| 149 } | |
| 150 | |
| 151 return 0; | |
| 152 } | |
| 153 | |
| 154 if (TraceClassResolution && !k()->klass_part()->oop_is_array()) { | |
| 155 // skip resolving the constant pool so that this code get's | |
| 156 // called the next time some bytecodes refer to this class. | |
| 157 ResourceMark rm; | |
| 158 int line_number = -1; | |
| 159 const char * source_file = NULL; | |
| 160 if (JavaThread::current()->has_last_Java_frame()) { | |
| 161 // try to identify the method which called this function. | |
| 162 vframeStream vfst(JavaThread::current()); | |
| 163 if (!vfst.at_end()) { | |
| 164 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
| 165 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); | |
| 166 if (s != NULL) { | |
| 167 source_file = s->as_C_string(); | |
| 168 } | |
| 169 } | |
| 170 } | |
| 171 if (k() != this_oop->pool_holder()) { | |
| 172 // only print something if the classes are different | |
| 173 if (source_file != NULL) { | |
| 174 tty->print("RESOLVE %s %s %s:%d\n", | |
| 175 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
| 176 instanceKlass::cast(k())->external_name(), source_file, line_number); | |
| 177 } else { | |
| 178 tty->print("RESOLVE %s %s\n", | |
| 179 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
| 180 instanceKlass::cast(k())->external_name()); | |
| 181 } | |
| 182 } | |
| 183 return k(); | |
| 184 } else { | |
| 185 ObjectLocker ol (this_oop, THREAD); | |
| 186 // Only updated constant pool - if it is resolved. | |
| 187 do_resolve = this_oop->tag_at(which).is_unresolved_klass(); | |
| 188 if (do_resolve) { | |
| 189 this_oop->klass_at_put(which, k()); | |
| 190 } | |
| 191 } | |
| 192 } | |
| 193 | |
| 194 entry = this_oop->resolved_klass_at(which); | |
| 195 assert(entry->is_klass(), "must be resolved at this point"); | |
| 196 return (klassOop)entry; | |
| 197 } | |
| 198 | |
| 199 | |
| 200 // Does not update constantPoolOop - to avoid any exception throwing. Used | |
| 201 // by compiler and exception handling. Also used to avoid classloads for | |
| 202 // instanceof operations. Returns NULL if the class has not been loaded or | |
| 203 // if the verification of constant pool failed | |
| 204 klassOop constantPoolOopDesc::klass_at_if_loaded(constantPoolHandle this_oop, int which) { | |
| 205 oop entry = *this_oop->obj_at_addr(which); | |
| 206 if (entry->is_klass()) { | |
| 207 return (klassOop)entry; | |
| 208 } else { | |
| 209 assert(entry->is_symbol(), "must be either symbol or klass"); | |
| 210 Thread *thread = Thread::current(); | |
| 211 symbolHandle name (thread, (symbolOop)entry); | |
| 212 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
| 213 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 214 Handle h_prot (thread, protection_domain); | |
| 215 Handle h_loader (thread, loader); | |
| 216 klassOop k = SystemDictionary::find(name, h_loader, h_prot, thread); | |
| 217 | |
| 218 if (k != NULL) { | |
| 219 // Make sure that resolving is legal | |
| 220 EXCEPTION_MARK; | |
| 221 KlassHandle klass(THREAD, k); | |
| 222 // return NULL if verification fails | |
| 223 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
| 224 if (HAS_PENDING_EXCEPTION) { | |
| 225 CLEAR_PENDING_EXCEPTION; | |
| 226 return NULL; | |
| 227 } | |
| 228 return klass(); | |
| 229 } else { | |
| 230 return k; | |
| 231 } | |
| 232 } | |
| 233 } | |
| 234 | |
| 235 | |
| 236 klassOop constantPoolOopDesc::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { | |
| 237 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); | |
| 238 } | |
| 239 | |
| 240 | |
| 241 // This is an interface for the compiler that allows accessing non-resolved entries | |
| 242 // in the constant pool - but still performs the validations tests. Must be used | |
| 243 // in a pre-parse of the compiler - to determine what it can do and not do. | |
| 244 // Note: We cannot update the ConstantPool from the vm_thread. | |
| 245 klassOop constantPoolOopDesc::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { | |
| 246 int which = this_oop->klass_ref_index_at(index); | |
| 247 oop entry = *this_oop->obj_at_addr(which); | |
| 248 if (entry->is_klass()) { | |
| 249 return (klassOop)entry; | |
| 250 } else { | |
| 251 assert(entry->is_symbol(), "must be either symbol or klass"); | |
| 252 symbolHandle name (THREAD, (symbolOop)entry); | |
| 253 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
| 254 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 255 Handle h_loader(THREAD, loader); | |
| 256 Handle h_prot (THREAD, protection_domain); | |
| 257 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
| 258 | |
| 259 // Do access check for klasses | |
| 260 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
| 261 return k(); | |
| 262 } | |
| 263 } | |
| 264 | |
| 265 | |
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266 symbolOop constantPoolOopDesc::impl_name_ref_at(int which, bool uncached) { |
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267 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
| 0 | 268 return symbol_at(name_index); |
| 269 } | |
| 270 | |
| 271 | |
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272 symbolOop constantPoolOopDesc::impl_signature_ref_at(int which, bool uncached) { |
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273 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
| 0 | 274 return symbol_at(signature_index); |
| 275 } | |
| 276 | |
| 277 | |
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278 int constantPoolOopDesc::impl_name_and_type_ref_index_at(int which, bool uncached) { |
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279 int i = which; |
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280 if (!uncached && cache() != NULL) { |
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281 if (constantPoolCacheOopDesc::is_secondary_index(which)) { |
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282 // Invokedynamic index. |
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283 int pool_index = cache()->main_entry_at(which)->constant_pool_index(); |
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284 if (!AllowTransitionalJSR292 || tag_at(pool_index).is_invoke_dynamic()) |
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285 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index); |
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286 assert(tag_at(pool_index).is_name_and_type(), ""); |
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287 return pool_index; |
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288 } |
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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 } else { |
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292 if (AllowTransitionalJSR292 && tag_at(which).is_name_and_type()) |
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293 // invokedynamic index is a simple name-and-type |
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294 return which; |
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295 if (tag_at(which).is_invoke_dynamic()) { |
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296 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which); |
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297 assert(tag_at(pool_index).is_name_and_type(), ""); |
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298 return pool_index; |
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299 } |
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300 } |
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301 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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302 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above"); |
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303 jint ref_index = *int_at_addr(i); |
| 0 | 304 return extract_high_short_from_int(ref_index); |
| 305 } | |
| 306 | |
| 307 | |
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308 int constantPoolOopDesc::impl_klass_ref_index_at(int which, bool uncached) { |
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309 guarantee(!constantPoolCacheOopDesc::is_secondary_index(which), |
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310 "an invokedynamic instruction does not have a klass"); |
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311 int i = which; |
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312 if (!uncached && cache() != NULL) { |
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313 // change byte-ordering and go via cache |
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314 i = remap_instruction_operand_from_cache(which); |
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315 } |
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316 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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317 jint ref_index = *int_at_addr(i); |
| 0 | 318 return extract_low_short_from_int(ref_index); |
| 319 } | |
| 320 | |
| 321 | |
|
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322 |
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323 int constantPoolOopDesc::remap_instruction_operand_from_cache(int operand) { |
| 1565 | 324 int cpc_index = operand; |
| 325 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG); | |
| 326 assert((int)(u2)cpc_index == cpc_index, "clean u2"); | |
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327 int member_index = cache()->entry_at(cpc_index)->constant_pool_index(); |
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328 return member_index; |
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329 } |
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330 |
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331 |
| 0 | 332 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
| 333 if (k->oop_is_instance() || k->oop_is_objArray()) { | |
| 334 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
| 335 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); | |
| 336 KlassHandle element (THREAD, elem_oop); | |
| 337 | |
| 338 // The element type could be a typeArray - we only need the access check if it is | |
| 339 // an reference to another class | |
| 340 if (element->oop_is_instance()) { | |
| 341 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
| 342 } | |
| 343 } | |
| 344 } | |
| 345 | |
| 346 | |
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347 int constantPoolOopDesc::name_ref_index_at(int which_nt) { |
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348 jint ref_index = name_and_type_at(which_nt); |
| 0 | 349 return extract_low_short_from_int(ref_index); |
| 350 } | |
| 351 | |
| 352 | |
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353 int constantPoolOopDesc::signature_ref_index_at(int which_nt) { |
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354 jint ref_index = name_and_type_at(which_nt); |
| 0 | 355 return extract_high_short_from_int(ref_index); |
| 356 } | |
| 357 | |
| 358 | |
| 359 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { | |
| 360 return klass_at(klass_ref_index_at(which), CHECK_NULL); | |
| 361 } | |
| 362 | |
| 363 | |
| 364 symbolOop constantPoolOopDesc::klass_name_at(int which) { | |
| 365 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), | |
| 366 "Corrupted constant pool"); | |
| 367 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
| 368 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
| 369 // tag is not updated atomicly. | |
| 370 oop entry = *(obj_at_addr(which)); | |
| 371 if (entry->is_klass()) { | |
| 372 // Already resolved - return entry's name. | |
| 373 return klassOop(entry)->klass_part()->name(); | |
| 374 } else { | |
| 375 assert(entry->is_symbol(), "must be either symbol or klass"); | |
| 376 return (symbolOop)entry; | |
| 377 } | |
| 378 } | |
| 379 | |
| 380 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) { | |
| 381 jint ref_index = klass_ref_index_at(which); | |
| 382 return klass_at_noresolve(ref_index); | |
| 383 } | |
| 384 | |
| 1602 | 385 symbolOop constantPoolOopDesc::uncached_klass_ref_at_noresolve(int which) { |
| 386 jint ref_index = uncached_klass_ref_index_at(which); | |
| 387 return klass_at_noresolve(ref_index); | |
| 388 } | |
| 389 | |
| 0 | 390 char* constantPoolOopDesc::string_at_noresolve(int which) { |
| 391 // Test entry type in case string is resolved while in here. | |
| 392 oop entry = *(obj_at_addr(which)); | |
| 393 if (entry->is_symbol()) { | |
| 394 return ((symbolOop)entry)->as_C_string(); | |
|
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395 } else if (java_lang_String::is_instance(entry)) { |
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396 return java_lang_String::as_utf8_string(entry); |
| 0 | 397 } else { |
|
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398 return (char*)"<pseudo-string>"; |
| 0 | 399 } |
| 400 } | |
| 401 | |
| 402 | |
| 403 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { | |
| 404 return FieldType::basic_type(symbol_at(which)); | |
| 405 } | |
| 406 | |
| 407 | |
| 408 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { | |
| 409 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused | |
| 410 if (this_oop->tag_at(index).is_unresolved_string()) { | |
| 411 this_oop->string_at(index, CHECK); | |
| 412 } | |
| 413 } | |
| 414 } | |
| 415 | |
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416 // A resolved constant value in the CP cache is represented as a non-null |
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417 // value. As a special case, this value can be a 'systemObjArray' |
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418 // which masks an exception object to throw. |
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419 // This allows a MethodHandle constant reference to throw a consistent |
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420 // exception every time, if it fails to resolve. |
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421 static oop decode_exception_from_f1(oop result_oop, TRAPS) { |
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422 if (result_oop->klass() != Universe::systemObjArrayKlassObj()) |
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423 return result_oop; |
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424 |
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425 // Special cases here: Masked null, saved exception. |
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426 objArrayOop sys_array = (objArrayOop) result_oop; |
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427 assert(sys_array->length() == 1, "bad system array"); |
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428 if (sys_array->length() == 1) { |
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429 THROW_OOP_(sys_array->obj_at(0), NULL); |
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430 } |
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431 return NULL; |
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432 } |
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433 |
| 1602 | 434 oop constantPoolOopDesc::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) { |
| 435 oop result_oop = NULL; | |
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436 Handle throw_exception; |
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437 |
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438 if (cache_index == _possible_index_sentinel) { |
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439 // It is possible that this constant is one which is cached in the CP cache. |
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440 // We'll do a linear search. This should be OK because this usage is rare. |
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441 assert(index > 0, "valid index"); |
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442 constantPoolCacheOop cache = this_oop()->cache(); |
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443 for (int i = 0, len = cache->length(); i < len; i++) { |
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444 ConstantPoolCacheEntry* cpc_entry = cache->entry_at(i); |
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445 if (!cpc_entry->is_secondary_entry() && cpc_entry->constant_pool_index() == index) { |
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446 // Switch the query to use this CPC entry. |
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447 cache_index = i; |
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448 index = _no_index_sentinel; |
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449 break; |
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450 } |
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451 } |
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452 if (cache_index == _possible_index_sentinel) |
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453 cache_index = _no_index_sentinel; // not found |
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454 } |
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455 assert(cache_index == _no_index_sentinel || cache_index >= 0, ""); |
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456 assert(index == _no_index_sentinel || index >= 0, ""); |
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457 |
| 1602 | 458 if (cache_index >= 0) { |
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459 assert(index == _no_index_sentinel, "only one kind of index at a time"); |
| 1602 | 460 ConstantPoolCacheEntry* cpc_entry = this_oop->cache()->entry_at(cache_index); |
| 461 result_oop = cpc_entry->f1(); | |
| 462 if (result_oop != NULL) { | |
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463 return decode_exception_from_f1(result_oop, THREAD); |
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464 // That was easy... |
| 1602 | 465 } |
| 466 index = cpc_entry->constant_pool_index(); | |
| 467 } | |
| 468 | |
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469 jvalue prim_value; // temp used only in a few cases below |
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470 |
| 1602 | 471 int tag_value = this_oop->tag_at(index).value(); |
| 472 switch (tag_value) { | |
| 473 | |
| 474 case JVM_CONSTANT_UnresolvedClass: | |
| 475 case JVM_CONSTANT_UnresolvedClassInError: | |
| 476 case JVM_CONSTANT_Class: | |
| 477 { | |
| 478 klassOop resolved = klass_at_impl(this_oop, index, CHECK_NULL); | |
| 479 // ldc wants the java mirror. | |
| 480 result_oop = resolved->klass_part()->java_mirror(); | |
| 481 break; | |
| 482 } | |
| 483 | |
| 484 case JVM_CONSTANT_String: | |
| 485 case JVM_CONSTANT_UnresolvedString: | |
| 486 if (this_oop->is_pseudo_string_at(index)) { | |
| 487 result_oop = this_oop->pseudo_string_at(index); | |
| 488 break; | |
| 489 } | |
| 490 result_oop = string_at_impl(this_oop, index, CHECK_NULL); | |
| 491 break; | |
| 492 | |
| 493 case JVM_CONSTANT_Object: | |
| 494 result_oop = this_oop->object_at(index); | |
| 495 break; | |
| 496 | |
| 497 case JVM_CONSTANT_MethodHandle: | |
| 498 { | |
| 499 int ref_kind = this_oop->method_handle_ref_kind_at(index); | |
| 500 int callee_index = this_oop->method_handle_klass_index_at(index); | |
| 501 symbolHandle name(THREAD, this_oop->method_handle_name_ref_at(index)); | |
| 502 symbolHandle signature(THREAD, this_oop->method_handle_signature_ref_at(index)); | |
| 503 if (PrintMiscellaneous) | |
| 504 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s", | |
| 505 ref_kind, index, this_oop->method_handle_index_at(index), | |
| 506 callee_index, name->as_C_string(), signature->as_C_string()); | |
| 507 KlassHandle callee; | |
| 508 { klassOop k = klass_at_impl(this_oop, callee_index, CHECK_NULL); | |
| 509 callee = KlassHandle(THREAD, k); | |
| 510 } | |
| 511 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
| 512 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind, | |
| 513 callee, name, signature, | |
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514 THREAD); |
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515 if (HAS_PENDING_EXCEPTION) { |
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516 throw_exception = Handle(THREAD, PENDING_EXCEPTION); |
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517 CLEAR_PENDING_EXCEPTION; |
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518 break; |
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519 } |
| 1602 | 520 result_oop = value(); |
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521 assert(result_oop != NULL, ""); |
| 1602 | 522 break; |
| 523 } | |
| 524 | |
| 525 case JVM_CONSTANT_MethodType: | |
| 526 { | |
| 527 symbolHandle signature(THREAD, this_oop->method_type_signature_at(index)); | |
| 528 if (PrintMiscellaneous) | |
| 529 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s", | |
| 530 index, this_oop->method_type_index_at(index), | |
| 531 signature->as_C_string()); | |
| 532 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
| 533 bool ignore_is_on_bcp = false; | |
| 534 Handle value = SystemDictionary::find_method_handle_type(signature, | |
| 535 klass, | |
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536 false, |
| 1602 | 537 ignore_is_on_bcp, |
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538 THREAD); |
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539 if (HAS_PENDING_EXCEPTION) { |
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540 throw_exception = Handle(THREAD, PENDING_EXCEPTION); |
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541 CLEAR_PENDING_EXCEPTION; |
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542 break; |
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543 } |
| 1602 | 544 result_oop = value(); |
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545 assert(result_oop != NULL, ""); |
| 1602 | 546 break; |
| 547 } | |
| 548 | |
| 549 case JVM_CONSTANT_Integer: | |
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550 prim_value.i = this_oop->int_at(index); |
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551 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL); |
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552 break; |
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553 |
| 1602 | 554 case JVM_CONSTANT_Float: |
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555 prim_value.f = this_oop->float_at(index); |
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556 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL); |
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557 break; |
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558 |
| 1602 | 559 case JVM_CONSTANT_Long: |
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560 prim_value.j = this_oop->long_at(index); |
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561 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL); |
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562 break; |
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563 |
| 1602 | 564 case JVM_CONSTANT_Double: |
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565 prim_value.d = this_oop->double_at(index); |
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566 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL); |
| 1602 | 567 break; |
| 568 | |
| 569 default: | |
| 570 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d", | |
| 571 this_oop(), index, cache_index, tag_value) ); | |
| 572 assert(false, "unexpected constant tag"); | |
| 573 break; | |
| 574 } | |
| 575 | |
| 576 if (cache_index >= 0) { | |
| 577 // Cache the oop here also. | |
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578 if (throw_exception.not_null()) { |
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579 objArrayOop sys_array = oopFactory::new_system_objArray(1, CHECK_NULL); |
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580 sys_array->obj_at_put(0, throw_exception()); |
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581 result_oop = sys_array; |
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582 throw_exception = Handle(); // be tidy |
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583 } |
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584 Handle result_handle(THREAD, result_oop); |
| 1602 | 585 result_oop = NULL; // safety |
| 586 ObjectLocker ol(this_oop, THREAD); | |
| 587 ConstantPoolCacheEntry* cpc_entry = this_oop->cache()->entry_at(cache_index); | |
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588 result_oop = cpc_entry->f1(); |
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589 // Benign race condition: f1 may already be filled in while we were trying to lock. |
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590 // The important thing here is that all threads pick up the same result. |
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591 // It doesn't matter which racing thread wins, as long as only one |
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592 // result is used by all threads, and all future queries. |
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593 // That result may be either a resolved constant or a failure exception. |
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594 if (result_oop == NULL) { |
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595 result_oop = result_handle(); |
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596 cpc_entry->set_f1(result_oop); |
| 1602 | 597 } |
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598 return decode_exception_from_f1(result_oop, THREAD); |
| 1602 | 599 } else { |
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600 if (throw_exception.not_null()) { |
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601 THROW_HANDLE_(throw_exception, NULL); |
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602 } |
| 1602 | 603 return result_oop; |
| 604 } | |
| 605 } | |
| 606 | |
| 0 | 607 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
| 608 oop entry = *(this_oop->obj_at_addr(which)); | |
| 609 if (entry->is_symbol()) { | |
| 610 ObjectLocker ol(this_oop, THREAD); | |
| 611 if (this_oop->tag_at(which).is_unresolved_string()) { | |
| 612 // Intern string | |
| 613 symbolOop sym = this_oop->unresolved_string_at(which); | |
| 614 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); | |
| 615 this_oop->string_at_put(which, entry); | |
| 616 } else { | |
| 617 // Another thread beat us and interned string, read string from constant pool | |
| 618 entry = this_oop->resolved_string_at(which); | |
| 619 } | |
| 620 } | |
| 621 assert(java_lang_String::is_instance(entry), "must be string"); | |
| 622 return entry; | |
| 623 } | |
| 624 | |
| 625 | |
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626 bool constantPoolOopDesc::is_pseudo_string_at(int which) { |
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627 oop entry = *(obj_at_addr(which)); |
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628 if (entry->is_symbol()) |
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629 // Not yet resolved, but it will resolve to a string. |
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630 return false; |
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631 else if (java_lang_String::is_instance(entry)) |
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632 return false; // actually, it might be a non-interned or non-perm string |
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633 else |
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634 // truly pseudo |
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635 return true; |
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636 } |
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637 |
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638 |
| 0 | 639 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, |
| 640 int which) { | |
| 641 // Names are interned, so we can compare symbolOops directly | |
| 642 symbolOop cp_name = klass_name_at(which); | |
| 643 return (cp_name == k->name()); | |
| 644 } | |
| 645 | |
| 646 | |
| 647 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { | |
| 648 ResourceMark rm; | |
| 649 int count = 0; | |
| 650 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused | |
| 651 if (tag_at(index).is_unresolved_string()) { | |
| 652 // Intern string | |
| 653 symbolOop sym = unresolved_string_at(index); | |
| 654 oop entry = StringTable::intern(sym, CHECK_(-1)); | |
| 655 string_at_put(index, entry); | |
| 656 } | |
| 657 } | |
| 658 return count; | |
| 659 } | |
| 660 | |
| 661 | |
| 662 // Iterate over symbols which are used as class, field, method names and | |
| 663 // signatures (in preparation for writing to the shared archive). | |
| 664 | |
| 665 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) { | |
| 666 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
| 667 switch (tag_at(index).value()) { | |
| 668 | |
| 669 case JVM_CONSTANT_UnresolvedClass: | |
| 670 closure->do_oop(obj_at_addr(index)); | |
| 671 break; | |
| 672 | |
| 673 case JVM_CONSTANT_NameAndType: | |
| 674 { | |
| 675 int i = *int_at_addr(index); | |
| 676 closure->do_oop(obj_at_addr((unsigned)i >> 16)); | |
| 677 closure->do_oop(obj_at_addr((unsigned)i & 0xffff)); | |
| 678 } | |
| 679 break; | |
| 680 | |
| 681 case JVM_CONSTANT_Class: | |
| 682 case JVM_CONSTANT_InterfaceMethodref: | |
| 683 case JVM_CONSTANT_Fieldref: | |
| 684 case JVM_CONSTANT_Methodref: | |
| 685 case JVM_CONSTANT_Integer: | |
| 686 case JVM_CONSTANT_Float: | |
| 687 // Do nothing! Not an oop. | |
| 688 // These constant types do not reference symbols at this point. | |
| 689 break; | |
| 690 | |
| 691 case JVM_CONSTANT_String: | |
| 692 // Do nothing! Not a symbol. | |
| 693 break; | |
| 694 | |
| 695 case JVM_CONSTANT_UnresolvedString: | |
| 696 case JVM_CONSTANT_Utf8: | |
| 697 // These constants are symbols, but unless these symbols are | |
| 698 // actually to be used for something, we don't want to mark them. | |
| 699 break; | |
| 700 | |
| 701 case JVM_CONSTANT_Long: | |
| 702 case JVM_CONSTANT_Double: | |
| 703 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 704 ++index; | |
| 705 break; | |
| 706 | |
| 707 default: | |
| 708 ShouldNotReachHere(); | |
| 709 break; | |
| 710 } | |
| 711 } | |
| 712 } | |
| 713 | |
| 714 | |
| 715 // Iterate over the [one] tags array (in preparation for writing to the | |
| 716 // shared archive). | |
| 717 | |
| 718 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { | |
| 719 closure->do_oop(tags_addr()); | |
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720 closure->do_oop(operands_addr()); |
| 0 | 721 } |
| 722 | |
| 723 | |
| 724 // Iterate over String objects (in preparation for writing to the shared | |
| 725 // archive). | |
| 726 | |
| 727 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { | |
| 728 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
| 729 switch (tag_at(index).value()) { | |
| 730 | |
| 731 case JVM_CONSTANT_UnresolvedClass: | |
| 732 case JVM_CONSTANT_NameAndType: | |
| 733 // Do nothing! Not a String. | |
| 734 break; | |
| 735 | |
| 736 case JVM_CONSTANT_Class: | |
| 737 case JVM_CONSTANT_InterfaceMethodref: | |
| 738 case JVM_CONSTANT_Fieldref: | |
| 739 case JVM_CONSTANT_Methodref: | |
| 740 case JVM_CONSTANT_Integer: | |
| 741 case JVM_CONSTANT_Float: | |
| 742 // Do nothing! Not an oop. | |
| 743 // These constant types do not reference symbols at this point. | |
| 744 break; | |
| 745 | |
| 746 case JVM_CONSTANT_String: | |
| 747 closure->do_oop(obj_at_addr(index)); | |
| 748 break; | |
| 749 | |
| 750 case JVM_CONSTANT_UnresolvedString: | |
| 751 case JVM_CONSTANT_Utf8: | |
| 752 // These constants are symbols, but unless these symbols are | |
| 753 // actually to be used for something, we don't want to mark them. | |
| 754 break; | |
| 755 | |
| 756 case JVM_CONSTANT_Long: | |
| 757 case JVM_CONSTANT_Double: | |
| 758 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 759 ++index; | |
| 760 break; | |
| 761 | |
| 762 default: | |
| 763 ShouldNotReachHere(); | |
| 764 break; | |
| 765 } | |
| 766 } | |
| 767 } | |
| 768 | |
| 769 | |
| 770 // Compare this constant pool's entry at index1 to the constant pool | |
| 771 // cp2's entry at index2. | |
| 772 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, | |
| 773 int index2, TRAPS) { | |
| 774 | |
| 775 jbyte t1 = tag_at(index1).value(); | |
| 776 jbyte t2 = cp2->tag_at(index2).value(); | |
| 777 | |
| 778 | |
| 779 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
| 780 // when comparing | |
| 781 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 782 t1 = JVM_CONSTANT_UnresolvedClass; | |
| 783 } | |
| 784 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 785 t2 = JVM_CONSTANT_UnresolvedClass; | |
| 786 } | |
| 787 | |
| 788 if (t1 != t2) { | |
| 789 // Not the same entry type so there is nothing else to check. Note | |
| 790 // that this style of checking will consider resolved/unresolved | |
| 791 // class pairs and resolved/unresolved string pairs as different. | |
| 792 // From the constantPoolOop API point of view, this is correct | |
| 793 // behavior. See constantPoolKlass::merge() to see how this plays | |
| 794 // out in the context of constantPoolOop merging. | |
| 795 return false; | |
| 796 } | |
| 797 | |
| 798 switch (t1) { | |
| 799 case JVM_CONSTANT_Class: | |
| 800 { | |
| 801 klassOop k1 = klass_at(index1, CHECK_false); | |
| 802 klassOop k2 = cp2->klass_at(index2, CHECK_false); | |
| 803 if (k1 == k2) { | |
| 804 return true; | |
| 805 } | |
| 806 } break; | |
| 807 | |
| 808 case JVM_CONSTANT_ClassIndex: | |
| 809 { | |
| 810 int recur1 = klass_index_at(index1); | |
| 811 int recur2 = cp2->klass_index_at(index2); | |
| 812 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 813 if (match) { | |
| 814 return true; | |
| 815 } | |
| 816 } break; | |
| 817 | |
| 818 case JVM_CONSTANT_Double: | |
| 819 { | |
| 820 jdouble d1 = double_at(index1); | |
| 821 jdouble d2 = cp2->double_at(index2); | |
| 822 if (d1 == d2) { | |
| 823 return true; | |
| 824 } | |
| 825 } break; | |
| 826 | |
| 827 case JVM_CONSTANT_Fieldref: | |
| 828 case JVM_CONSTANT_InterfaceMethodref: | |
| 829 case JVM_CONSTANT_Methodref: | |
| 830 { | |
| 831 int recur1 = uncached_klass_ref_index_at(index1); | |
| 832 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
| 833 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 834 if (match) { | |
| 835 recur1 = uncached_name_and_type_ref_index_at(index1); | |
| 836 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
| 837 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 838 if (match) { | |
| 839 return true; | |
| 840 } | |
| 841 } | |
| 842 } break; | |
| 843 | |
| 844 case JVM_CONSTANT_Float: | |
| 845 { | |
| 846 jfloat f1 = float_at(index1); | |
| 847 jfloat f2 = cp2->float_at(index2); | |
| 848 if (f1 == f2) { | |
| 849 return true; | |
| 850 } | |
| 851 } break; | |
| 852 | |
| 853 case JVM_CONSTANT_Integer: | |
| 854 { | |
| 855 jint i1 = int_at(index1); | |
| 856 jint i2 = cp2->int_at(index2); | |
| 857 if (i1 == i2) { | |
| 858 return true; | |
| 859 } | |
| 860 } break; | |
| 861 | |
| 862 case JVM_CONSTANT_Long: | |
| 863 { | |
| 864 jlong l1 = long_at(index1); | |
| 865 jlong l2 = cp2->long_at(index2); | |
| 866 if (l1 == l2) { | |
| 867 return true; | |
| 868 } | |
| 869 } break; | |
| 870 | |
| 871 case JVM_CONSTANT_NameAndType: | |
| 872 { | |
| 873 int recur1 = name_ref_index_at(index1); | |
| 874 int recur2 = cp2->name_ref_index_at(index2); | |
| 875 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 876 if (match) { | |
| 877 recur1 = signature_ref_index_at(index1); | |
| 878 recur2 = cp2->signature_ref_index_at(index2); | |
| 879 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 880 if (match) { | |
| 881 return true; | |
| 882 } | |
| 883 } | |
| 884 } break; | |
| 885 | |
| 886 case JVM_CONSTANT_String: | |
| 887 { | |
| 888 oop s1 = string_at(index1, CHECK_false); | |
| 889 oop s2 = cp2->string_at(index2, CHECK_false); | |
| 890 if (s1 == s2) { | |
| 891 return true; | |
| 892 } | |
| 893 } break; | |
| 894 | |
| 895 case JVM_CONSTANT_StringIndex: | |
| 896 { | |
| 897 int recur1 = string_index_at(index1); | |
| 898 int recur2 = cp2->string_index_at(index2); | |
| 899 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 900 if (match) { | |
| 901 return true; | |
| 902 } | |
| 903 } break; | |
| 904 | |
| 905 case JVM_CONSTANT_UnresolvedClass: | |
| 906 { | |
| 907 symbolOop k1 = unresolved_klass_at(index1); | |
| 908 symbolOop k2 = cp2->unresolved_klass_at(index2); | |
| 909 if (k1 == k2) { | |
| 910 return true; | |
| 911 } | |
| 912 } break; | |
| 913 | |
| 1602 | 914 case JVM_CONSTANT_MethodType: |
| 915 { | |
| 916 int k1 = method_type_index_at(index1); | |
| 917 int k2 = cp2->method_type_index_at(index2); | |
| 918 if (k1 == k2) { | |
| 919 return true; | |
| 920 } | |
| 921 } break; | |
| 922 | |
| 923 case JVM_CONSTANT_MethodHandle: | |
| 924 { | |
| 925 int k1 = method_handle_ref_kind_at(index1); | |
| 926 int k2 = cp2->method_handle_ref_kind_at(index2); | |
| 927 if (k1 == k2) { | |
| 928 int i1 = method_handle_index_at(index1); | |
| 929 int i2 = cp2->method_handle_index_at(index2); | |
| 930 if (i1 == i2) { | |
| 931 return true; | |
| 932 } | |
| 933 } | |
| 934 } break; | |
| 935 | |
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936 case JVM_CONSTANT_InvokeDynamic: |
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937 { |
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938 int op_count = multi_operand_count_at(index1); |
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939 if (op_count == cp2->multi_operand_count_at(index2)) { |
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940 bool all_equal = true; |
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941 for (int op_i = 0; op_i < op_count; op_i++) { |
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942 int k1 = multi_operand_ref_at(index1, op_i); |
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943 int k2 = cp2->multi_operand_ref_at(index2, op_i); |
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944 if (k1 != k2) { |
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945 all_equal = false; |
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946 break; |
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947 } |
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948 } |
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949 if (all_equal) { |
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950 return true; // got through loop; all elements equal |
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951 } |
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952 } |
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953 } break; |
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954 |
| 0 | 955 case JVM_CONSTANT_UnresolvedString: |
| 956 { | |
| 957 symbolOop s1 = unresolved_string_at(index1); | |
| 958 symbolOop s2 = cp2->unresolved_string_at(index2); | |
| 959 if (s1 == s2) { | |
| 960 return true; | |
| 961 } | |
| 962 } break; | |
| 963 | |
| 964 case JVM_CONSTANT_Utf8: | |
| 965 { | |
| 966 symbolOop s1 = symbol_at(index1); | |
| 967 symbolOop s2 = cp2->symbol_at(index2); | |
| 968 if (s1 == s2) { | |
| 969 return true; | |
| 970 } | |
| 971 } break; | |
| 972 | |
| 973 // Invalid is used as the tag for the second constant pool entry | |
| 974 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 975 // not be seen by itself. | |
| 976 case JVM_CONSTANT_Invalid: // fall through | |
| 977 | |
| 978 default: | |
| 979 ShouldNotReachHere(); | |
| 980 break; | |
| 981 } | |
| 982 | |
| 983 return false; | |
| 984 } // end compare_entry_to() | |
| 985 | |
| 986 | |
|
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987 // Grow this->operands() to the indicated length, unless it is already at least that long. |
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988 void constantPoolOopDesc::multi_operand_buffer_grow(int min_length, TRAPS) { |
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989 int old_length = multi_operand_buffer_fill_pointer(); |
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990 if (old_length >= min_length) return; |
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991 int new_length = min_length; |
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992 assert(new_length > _multi_operand_buffer_fill_pointer_offset, ""); |
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993 typeArrayHandle new_operands = oopFactory::new_permanent_intArray(new_length, CHECK); |
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994 if (operands() == NULL) { |
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995 new_operands->int_at_put(_multi_operand_buffer_fill_pointer_offset, old_length); |
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996 } else { |
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997 // copy fill pointer and everything else |
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998 for (int i = 0; i < old_length; i++) { |
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999 new_operands->int_at_put(i, operands()->int_at(i)); |
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1000 } |
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1001 } |
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1002 set_operands(new_operands()); |
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1003 } |
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1004 |
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1005 |
| 0 | 1006 // Copy this constant pool's entries at start_i to end_i (inclusive) |
| 1007 // to the constant pool to_cp's entries starting at to_i. A total of | |
| 1008 // (end_i - start_i) + 1 entries are copied. | |
| 1009 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i, | |
| 1010 constantPoolHandle to_cp, int to_i, TRAPS) { | |
| 1011 | |
| 1012 int dest_i = to_i; // leave original alone for debug purposes | |
| 1013 | |
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1014 if (operands() != NULL) { |
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1015 // pre-grow the target CP's operand buffer |
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1016 int nops = this->multi_operand_buffer_fill_pointer(); |
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1017 nops += to_cp->multi_operand_buffer_fill_pointer(); |
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1018 to_cp->multi_operand_buffer_grow(nops, CHECK); |
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1019 } |
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1020 |
| 0 | 1021 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { |
| 1022 copy_entry_to(src_i, to_cp, dest_i, CHECK); | |
| 1023 | |
| 1024 switch (tag_at(src_i).value()) { | |
| 1025 case JVM_CONSTANT_Double: | |
| 1026 case JVM_CONSTANT_Long: | |
| 1027 // double and long take two constant pool entries | |
| 1028 src_i += 2; | |
| 1029 dest_i += 2; | |
| 1030 break; | |
| 1031 | |
| 1032 default: | |
| 1033 // all others take one constant pool entry | |
| 1034 src_i++; | |
| 1035 dest_i++; | |
| 1036 break; | |
| 1037 } | |
| 1038 } | |
| 1039 } // end copy_cp_to() | |
| 1040 | |
| 1041 | |
| 1042 // Copy this constant pool's entry at from_i to the constant pool | |
| 1043 // to_cp's entry at to_i. | |
| 1044 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp, | |
| 1045 int to_i, TRAPS) { | |
| 1046 | |
| 1047 switch (tag_at(from_i).value()) { | |
| 1048 case JVM_CONSTANT_Class: | |
| 1049 { | |
| 1050 klassOop k = klass_at(from_i, CHECK); | |
| 1051 to_cp->klass_at_put(to_i, k); | |
| 1052 } break; | |
| 1053 | |
| 1054 case JVM_CONSTANT_ClassIndex: | |
| 1055 { | |
| 1056 jint ki = klass_index_at(from_i); | |
| 1057 to_cp->klass_index_at_put(to_i, ki); | |
| 1058 } break; | |
| 1059 | |
| 1060 case JVM_CONSTANT_Double: | |
| 1061 { | |
| 1062 jdouble d = double_at(from_i); | |
| 1063 to_cp->double_at_put(to_i, d); | |
| 1064 // double takes two constant pool entries so init second entry's tag | |
| 1065 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 1066 } break; | |
| 1067 | |
| 1068 case JVM_CONSTANT_Fieldref: | |
| 1069 { | |
| 1070 int class_index = uncached_klass_ref_index_at(from_i); | |
| 1071 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 1072 to_cp->field_at_put(to_i, class_index, name_and_type_index); | |
| 1073 } break; | |
| 1074 | |
| 1075 case JVM_CONSTANT_Float: | |
| 1076 { | |
| 1077 jfloat f = float_at(from_i); | |
| 1078 to_cp->float_at_put(to_i, f); | |
| 1079 } break; | |
| 1080 | |
| 1081 case JVM_CONSTANT_Integer: | |
| 1082 { | |
| 1083 jint i = int_at(from_i); | |
| 1084 to_cp->int_at_put(to_i, i); | |
| 1085 } break; | |
| 1086 | |
| 1087 case JVM_CONSTANT_InterfaceMethodref: | |
| 1088 { | |
| 1089 int class_index = uncached_klass_ref_index_at(from_i); | |
| 1090 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 1091 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); | |
| 1092 } break; | |
| 1093 | |
| 1094 case JVM_CONSTANT_Long: | |
| 1095 { | |
| 1096 jlong l = long_at(from_i); | |
| 1097 to_cp->long_at_put(to_i, l); | |
| 1098 // long takes two constant pool entries so init second entry's tag | |
| 1099 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 1100 } break; | |
| 1101 | |
| 1102 case JVM_CONSTANT_Methodref: | |
| 1103 { | |
| 1104 int class_index = uncached_klass_ref_index_at(from_i); | |
| 1105 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 1106 to_cp->method_at_put(to_i, class_index, name_and_type_index); | |
| 1107 } break; | |
| 1108 | |
| 1109 case JVM_CONSTANT_NameAndType: | |
| 1110 { | |
| 1111 int name_ref_index = name_ref_index_at(from_i); | |
| 1112 int signature_ref_index = signature_ref_index_at(from_i); | |
| 1113 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); | |
| 1114 } break; | |
| 1115 | |
| 1116 case JVM_CONSTANT_String: | |
| 1117 { | |
| 1118 oop s = string_at(from_i, CHECK); | |
| 1119 to_cp->string_at_put(to_i, s); | |
| 1120 } break; | |
| 1121 | |
| 1122 case JVM_CONSTANT_StringIndex: | |
| 1123 { | |
| 1124 jint si = string_index_at(from_i); | |
| 1125 to_cp->string_index_at_put(to_i, si); | |
| 1126 } break; | |
| 1127 | |
| 1128 case JVM_CONSTANT_UnresolvedClass: | |
| 1129 { | |
| 1130 symbolOop k = unresolved_klass_at(from_i); | |
| 1131 to_cp->unresolved_klass_at_put(to_i, k); | |
| 1132 } break; | |
| 1133 | |
| 1134 case JVM_CONSTANT_UnresolvedClassInError: | |
| 1135 { | |
| 1136 symbolOop k = unresolved_klass_at(from_i); | |
| 1137 to_cp->unresolved_klass_at_put(to_i, k); | |
| 1138 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
| 1139 } break; | |
| 1140 | |
| 1141 | |
| 1142 case JVM_CONSTANT_UnresolvedString: | |
| 1143 { | |
| 1144 symbolOop s = unresolved_string_at(from_i); | |
| 1145 to_cp->unresolved_string_at_put(to_i, s); | |
| 1146 } break; | |
| 1147 | |
| 1148 case JVM_CONSTANT_Utf8: | |
| 1149 { | |
| 1150 symbolOop s = symbol_at(from_i); | |
| 1151 to_cp->symbol_at_put(to_i, s); | |
| 1152 } break; | |
| 1153 | |
| 1602 | 1154 case JVM_CONSTANT_MethodType: |
| 1155 { | |
| 1156 jint k = method_type_index_at(from_i); | |
| 1157 to_cp->method_type_index_at_put(to_i, k); | |
| 1158 } break; | |
| 1159 | |
| 1160 case JVM_CONSTANT_MethodHandle: | |
| 1161 { | |
| 1162 int k1 = method_handle_ref_kind_at(from_i); | |
| 1163 int k2 = method_handle_index_at(from_i); | |
| 1164 to_cp->method_handle_index_at_put(to_i, k1, k2); | |
| 1165 } break; | |
| 1166 | |
|
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1167 case JVM_CONSTANT_InvokeDynamic: |
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1168 { |
|
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1169 int op_count = multi_operand_count_at(from_i); |
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1170 int fillp = to_cp->multi_operand_buffer_fill_pointer(); |
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1171 int to_op_base = fillp - _multi_operand_count_offset; // fillp is count offset; get to base |
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1172 to_cp->multi_operand_buffer_grow(to_op_base + op_count, CHECK); |
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1173 to_cp->operands()->int_at_put(fillp++, op_count); |
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1174 assert(fillp == to_op_base + _multi_operand_base_offset, "just wrote count, will now write args"); |
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1175 for (int op_i = 0; op_i < op_count; op_i++) { |
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1176 int op = multi_operand_ref_at(from_i, op_i); |
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1177 to_cp->operands()->int_at_put(fillp++, op); |
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1178 } |
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1179 assert(fillp <= to_cp->operands()->length(), "oob"); |
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1180 to_cp->set_multi_operand_buffer_fill_pointer(fillp); |
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1181 to_cp->invoke_dynamic_at_put(to_i, to_op_base, op_count); |
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1182 #ifdef ASSERT |
|
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1183 int k1 = invoke_dynamic_bootstrap_method_ref_index_at(from_i); |
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1184 int k2 = invoke_dynamic_name_and_type_ref_index_at(from_i); |
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1185 int k3 = invoke_dynamic_argument_count_at(from_i); |
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1186 assert(to_cp->check_invoke_dynamic_at(to_i, k1, k2, k3), |
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1187 "indy structure is OK"); |
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1188 #endif //ASSERT |
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1189 } break; |
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1190 |
| 0 | 1191 // Invalid is used as the tag for the second constant pool entry |
| 1192 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 1193 // not be seen by itself. | |
| 1194 case JVM_CONSTANT_Invalid: // fall through | |
| 1195 | |
| 1196 default: | |
| 1197 { | |
| 1198 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb | |
| 1199 ShouldNotReachHere(); | |
| 1200 } break; | |
| 1201 } | |
| 1202 } // end copy_entry_to() | |
| 1203 | |
| 1204 | |
| 1205 // Search constant pool search_cp for an entry that matches this | |
| 1206 // constant pool's entry at pattern_i. Returns the index of a | |
| 1207 // matching entry or zero (0) if there is no matching entry. | |
| 1208 int constantPoolOopDesc::find_matching_entry(int pattern_i, | |
| 1209 constantPoolHandle search_cp, TRAPS) { | |
| 1210 | |
| 1211 // index zero (0) is not used | |
| 1212 for (int i = 1; i < search_cp->length(); i++) { | |
| 1213 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
| 1214 if (found) { | |
| 1215 return i; | |
| 1216 } | |
| 1217 } | |
| 1218 | |
| 1219 return 0; // entry not found; return unused index zero (0) | |
| 1220 } // end find_matching_entry() | |
| 1221 | |
| 1222 | |
| 1223 #ifndef PRODUCT | |
| 1224 | |
| 1225 const char* constantPoolOopDesc::printable_name_at(int which) { | |
| 1226 | |
| 1227 constantTag tag = tag_at(which); | |
| 1228 | |
| 1229 if (tag.is_unresolved_string() || tag.is_string()) { | |
| 1230 return string_at_noresolve(which); | |
| 1231 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
| 1232 return klass_name_at(which)->as_C_string(); | |
| 1233 } else if (tag.is_symbol()) { | |
| 1234 return symbol_at(which)->as_C_string(); | |
| 1235 } | |
| 1236 return ""; | |
| 1237 } | |
| 1238 | |
| 1239 #endif // PRODUCT | |
| 1240 | |
| 1241 | |
| 1242 // JVMTI GetConstantPool support | |
| 1243 | |
| 1244 // For temporary use until code is stable. | |
| 1245 #define DBG(code) | |
| 1246 | |
| 1247 static const char* WARN_MSG = "Must not be such entry!"; | |
| 1248 | |
| 1249 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
| 1250 jint size = 0; | |
| 1251 u2 idx1, idx2; | |
| 1252 | |
| 1253 for (jint idx = 1; idx < cnt; idx++) { | |
| 1254 jint ent_size = 0; | |
| 1255 u1 tag = *bytes++; | |
| 1256 size++; // count tag | |
| 1257 | |
| 1258 printf("const #%03d, tag: %02d ", idx, tag); | |
| 1259 switch(tag) { | |
| 1260 case JVM_CONSTANT_Invalid: { | |
| 1261 printf("Invalid"); | |
| 1262 break; | |
| 1263 } | |
| 1264 case JVM_CONSTANT_Unicode: { | |
| 1265 printf("Unicode %s", WARN_MSG); | |
| 1266 break; | |
| 1267 } | |
| 1268 case JVM_CONSTANT_Utf8: { | |
| 1269 u2 len = Bytes::get_Java_u2(bytes); | |
| 1270 char str[128]; | |
| 1271 if (len > 127) { | |
| 1272 len = 127; | |
| 1273 } | |
| 1274 strncpy(str, (char *) (bytes+2), len); | |
| 1275 str[len] = '\0'; | |
| 1276 printf("Utf8 \"%s\"", str); | |
| 1277 ent_size = 2 + len; | |
| 1278 break; | |
| 1279 } | |
| 1280 case JVM_CONSTANT_Integer: { | |
| 1281 u4 val = Bytes::get_Java_u4(bytes); | |
| 1282 printf("int %d", *(int *) &val); | |
| 1283 ent_size = 4; | |
| 1284 break; | |
| 1285 } | |
| 1286 case JVM_CONSTANT_Float: { | |
| 1287 u4 val = Bytes::get_Java_u4(bytes); | |
| 1288 printf("float %5.3ff", *(float *) &val); | |
| 1289 ent_size = 4; | |
| 1290 break; | |
| 1291 } | |
| 1292 case JVM_CONSTANT_Long: { | |
| 1293 u8 val = Bytes::get_Java_u8(bytes); | |
|
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1294 printf("long "INT64_FORMAT, *(jlong *) &val); |
| 0 | 1295 ent_size = 8; |
| 1296 idx++; // Long takes two cpool slots | |
| 1297 break; | |
| 1298 } | |
| 1299 case JVM_CONSTANT_Double: { | |
| 1300 u8 val = Bytes::get_Java_u8(bytes); | |
| 1301 printf("double %5.3fd", *(jdouble *)&val); | |
| 1302 ent_size = 8; | |
| 1303 idx++; // Double takes two cpool slots | |
| 1304 break; | |
| 1305 } | |
| 1306 case JVM_CONSTANT_Class: { | |
| 1307 idx1 = Bytes::get_Java_u2(bytes); | |
| 1308 printf("class #%03d", idx1); | |
| 1309 ent_size = 2; | |
| 1310 break; | |
| 1311 } | |
| 1312 case JVM_CONSTANT_String: { | |
| 1313 idx1 = Bytes::get_Java_u2(bytes); | |
| 1314 printf("String #%03d", idx1); | |
| 1315 ent_size = 2; | |
| 1316 break; | |
| 1317 } | |
| 1318 case JVM_CONSTANT_Fieldref: { | |
| 1319 idx1 = Bytes::get_Java_u2(bytes); | |
| 1320 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1321 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
| 1322 ent_size = 4; | |
| 1323 break; | |
| 1324 } | |
| 1325 case JVM_CONSTANT_Methodref: { | |
| 1326 idx1 = Bytes::get_Java_u2(bytes); | |
| 1327 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1328 printf("Method #%03d, #%03d", idx1, idx2); | |
| 1329 ent_size = 4; | |
| 1330 break; | |
| 1331 } | |
| 1332 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1333 idx1 = Bytes::get_Java_u2(bytes); | |
| 1334 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1335 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
| 1336 ent_size = 4; | |
| 1337 break; | |
| 1338 } | |
| 1339 case JVM_CONSTANT_NameAndType: { | |
| 1340 idx1 = Bytes::get_Java_u2(bytes); | |
| 1341 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1342 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
| 1343 ent_size = 4; | |
| 1344 break; | |
| 1345 } | |
| 1346 case JVM_CONSTANT_ClassIndex: { | |
| 1347 printf("ClassIndex %s", WARN_MSG); | |
| 1348 break; | |
| 1349 } | |
| 1350 case JVM_CONSTANT_UnresolvedClass: { | |
| 1351 printf("UnresolvedClass: %s", WARN_MSG); | |
| 1352 break; | |
| 1353 } | |
| 1354 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1355 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
| 1356 break; | |
| 1357 } | |
| 1358 case JVM_CONSTANT_StringIndex: { | |
| 1359 printf("StringIndex: %s", WARN_MSG); | |
| 1360 break; | |
| 1361 } | |
| 1362 case JVM_CONSTANT_UnresolvedString: { | |
| 1363 printf("UnresolvedString: %s", WARN_MSG); | |
| 1364 break; | |
| 1365 } | |
| 1366 } | |
| 1367 printf(";\n"); | |
| 1368 bytes += ent_size; | |
| 1369 size += ent_size; | |
| 1370 } | |
| 1371 printf("Cpool size: %d\n", size); | |
| 1372 fflush(0); | |
| 1373 return; | |
| 1374 } /* end print_cpool_bytes */ | |
| 1375 | |
| 1376 | |
| 1377 // Returns size of constant pool entry. | |
| 1378 jint constantPoolOopDesc::cpool_entry_size(jint idx) { | |
| 1379 switch(tag_at(idx).value()) { | |
| 1380 case JVM_CONSTANT_Invalid: | |
| 1381 case JVM_CONSTANT_Unicode: | |
| 1382 return 1; | |
| 1383 | |
| 1384 case JVM_CONSTANT_Utf8: | |
| 1385 return 3 + symbol_at(idx)->utf8_length(); | |
| 1386 | |
| 1387 case JVM_CONSTANT_Class: | |
| 1388 case JVM_CONSTANT_String: | |
| 1389 case JVM_CONSTANT_ClassIndex: | |
| 1390 case JVM_CONSTANT_UnresolvedClass: | |
| 1391 case JVM_CONSTANT_UnresolvedClassInError: | |
| 1392 case JVM_CONSTANT_StringIndex: | |
| 1393 case JVM_CONSTANT_UnresolvedString: | |
| 1602 | 1394 case JVM_CONSTANT_MethodType: |
| 0 | 1395 return 3; |
| 1396 | |
| 1602 | 1397 case JVM_CONSTANT_MethodHandle: |
| 1398 return 4; //tag, ref_kind, ref_index | |
| 1399 | |
| 0 | 1400 case JVM_CONSTANT_Integer: |
| 1401 case JVM_CONSTANT_Float: | |
| 1402 case JVM_CONSTANT_Fieldref: | |
| 1403 case JVM_CONSTANT_Methodref: | |
| 1404 case JVM_CONSTANT_InterfaceMethodref: | |
| 1405 case JVM_CONSTANT_NameAndType: | |
|
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|
1406 return 5; |
|
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|
1407 |
|
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|
1408 case JVM_CONSTANT_InvokeDynamic: |
|
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1409 // u1 tag, u2 bsm, u2 nt, u2 argc, u2 argv[argc] |
|
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1410 return 7 + 2 * invoke_dynamic_argument_count_at(idx); |
| 0 | 1411 |
| 1412 case JVM_CONSTANT_Long: | |
| 1413 case JVM_CONSTANT_Double: | |
| 1414 return 9; | |
| 1415 } | |
| 1416 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
| 1417 return 1; | |
| 1418 } /* end cpool_entry_size */ | |
| 1419 | |
| 1420 | |
| 1421 // SymbolHashMap is used to find a constant pool index from a string. | |
| 1422 // This function fills in SymbolHashMaps, one for utf8s and one for | |
| 1423 // class names, returns size of the cpool raw bytes. | |
| 1424 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, | |
| 1425 SymbolHashMap *classmap) { | |
| 1426 jint size = 0; | |
| 1427 | |
| 1428 for (u2 idx = 1; idx < length(); idx++) { | |
| 1429 u2 tag = tag_at(idx).value(); | |
| 1430 size += cpool_entry_size(idx); | |
| 1431 | |
| 1432 switch(tag) { | |
| 1433 case JVM_CONSTANT_Utf8: { | |
| 1434 symbolOop sym = symbol_at(idx); | |
| 1435 symmap->add_entry(sym, idx); | |
| 1436 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1437 break; | |
| 1438 } | |
| 1439 case JVM_CONSTANT_Class: | |
| 1440 case JVM_CONSTANT_UnresolvedClass: | |
| 1441 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1442 symbolOop sym = klass_name_at(idx); | |
| 1443 classmap->add_entry(sym, idx); | |
| 1444 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1445 break; | |
| 1446 } | |
| 1447 case JVM_CONSTANT_Long: | |
| 1448 case JVM_CONSTANT_Double: { | |
| 1449 idx++; // Both Long and Double take two cpool slots | |
| 1450 break; | |
| 1451 } | |
| 1452 } | |
| 1453 } | |
| 1454 return size; | |
| 1455 } /* end hash_utf8_entries_to */ | |
| 1456 | |
| 1457 | |
| 1458 // Copy cpool bytes. | |
| 1459 // Returns: | |
| 1460 // 0, in case of OutOfMemoryError | |
| 1461 // -1, in case of internal error | |
| 1462 // > 0, count of the raw cpool bytes that have been copied | |
| 1463 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, | |
| 1464 SymbolHashMap* tbl, | |
| 1465 unsigned char *bytes) { | |
| 1466 u2 idx1, idx2; | |
| 1467 jint size = 0; | |
| 1468 jint cnt = length(); | |
| 1469 unsigned char *start_bytes = bytes; | |
| 1470 | |
| 1471 for (jint idx = 1; idx < cnt; idx++) { | |
| 1472 u1 tag = tag_at(idx).value(); | |
| 1473 jint ent_size = cpool_entry_size(idx); | |
| 1474 | |
| 1475 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
| 1476 | |
| 1477 *bytes = tag; | |
| 1478 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
| 1479 switch(tag) { | |
| 1480 case JVM_CONSTANT_Invalid: { | |
| 1481 DBG(printf("JVM_CONSTANT_Invalid")); | |
| 1482 break; | |
| 1483 } | |
| 1484 case JVM_CONSTANT_Unicode: { | |
| 1485 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
| 1486 DBG(printf("JVM_CONSTANT_Unicode")); | |
| 1487 break; | |
| 1488 } | |
| 1489 case JVM_CONSTANT_Utf8: { | |
| 1490 symbolOop sym = symbol_at(idx); | |
| 1491 char* str = sym->as_utf8(); | |
| 1492 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
| 1493 int len = (int) strlen(str); | |
| 1494 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
| 1495 for (int i = 0; i < len; i++) { | |
| 1496 bytes[3+i] = (u1) str[i]; | |
| 1497 } | |
| 1498 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
| 1499 break; | |
| 1500 } | |
| 1501 case JVM_CONSTANT_Integer: { | |
| 1502 jint val = int_at(idx); | |
| 1503 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1504 break; | |
| 1505 } | |
| 1506 case JVM_CONSTANT_Float: { | |
| 1507 jfloat val = float_at(idx); | |
| 1508 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1509 break; | |
| 1510 } | |
| 1511 case JVM_CONSTANT_Long: { | |
| 1512 jlong val = long_at(idx); | |
| 1513 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1514 idx++; // Long takes two cpool slots | |
| 1515 break; | |
| 1516 } | |
| 1517 case JVM_CONSTANT_Double: { | |
| 1518 jdouble val = double_at(idx); | |
| 1519 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1520 idx++; // Double takes two cpool slots | |
| 1521 break; | |
| 1522 } | |
| 1523 case JVM_CONSTANT_Class: | |
| 1524 case JVM_CONSTANT_UnresolvedClass: | |
| 1525 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1526 *bytes = JVM_CONSTANT_Class; | |
| 1527 symbolOop sym = klass_name_at(idx); | |
| 1528 idx1 = tbl->symbol_to_value(sym); | |
| 1529 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1530 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1531 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
| 1532 break; | |
| 1533 } | |
| 1534 case JVM_CONSTANT_String: { | |
| 1535 unsigned int hash; | |
| 1536 char *str = string_at_noresolve(idx); | |
| 1537 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); | |
|
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1538 if (sym == NULL) { |
|
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|
1539 // sym can be NULL if string refers to incorrectly encoded JVM_CONSTANT_Utf8 |
|
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|
1540 // this can happen with JVM TI; see CR 6839599 for more details |
|
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|
1541 oop string = *(obj_at_addr(idx)); |
|
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1542 assert(java_lang_String::is_instance(string),"Not a String"); |
|
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1543 DBG(printf("Error #%03hd tag=%03hd\n", idx, tag)); |
|
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|
1544 idx1 = 0; |
|
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|
1545 for (int j = 0; j < tbl->table_size() && idx1 == 0; j++) { |
|
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|
1546 for (SymbolHashMapEntry* cur = tbl->bucket(j); cur != NULL; cur = cur->next()) { |
|
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|
1547 int length; |
|
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|
1548 sym = cur->symbol(); |
|
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|
1549 jchar* chars = sym->as_unicode(length); |
|
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|
1550 if (java_lang_String::equals(string, chars, length)) { |
|
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diff
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|
1551 idx1 = cur->value(); |
|
47ffceb239d0
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|
1552 DBG(printf("Index found: %d\n",idx1)); |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
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diff
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|
1553 break; |
|
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diff
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|
1554 } |
|
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|
1555 } |
|
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|
1556 } |
|
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|
1557 } else { |
|
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|
1558 idx1 = tbl->symbol_to_value(sym); |
|
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|
1559 } |
| 0 | 1560 assert(idx1 != 0, "Have not found a hashtable entry"); |
| 1561 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1562 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); | |
| 1563 break; | |
| 1564 } | |
| 1565 case JVM_CONSTANT_UnresolvedString: { | |
| 1566 *bytes = JVM_CONSTANT_String; | |
| 1567 symbolOop sym = unresolved_string_at(idx); | |
| 1568 idx1 = tbl->symbol_to_value(sym); | |
| 1569 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1570 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1571 DBG(char *str = sym->as_utf8()); | |
| 1572 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); | |
| 1573 break; | |
| 1574 } | |
| 1575 case JVM_CONSTANT_Fieldref: | |
| 1576 case JVM_CONSTANT_Methodref: | |
| 1577 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1578 idx1 = uncached_klass_ref_index_at(idx); | |
| 1579 idx2 = uncached_name_and_type_ref_index_at(idx); | |
| 1580 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1581 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1582 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
| 1583 break; | |
| 1584 } | |
| 1585 case JVM_CONSTANT_NameAndType: { | |
| 1586 idx1 = name_ref_index_at(idx); | |
| 1587 idx2 = signature_ref_index_at(idx); | |
| 1588 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1589 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1590 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
| 1591 break; | |
| 1592 } | |
| 1593 case JVM_CONSTANT_ClassIndex: { | |
| 1594 *bytes = JVM_CONSTANT_Class; | |
| 1595 idx1 = klass_index_at(idx); | |
| 1596 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1597 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
| 1598 break; | |
| 1599 } | |
| 1600 case JVM_CONSTANT_StringIndex: { | |
| 1601 *bytes = JVM_CONSTANT_String; | |
| 1602 idx1 = string_index_at(idx); | |
| 1603 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1604 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
| 1605 break; | |
| 1606 } | |
| 1602 | 1607 case JVM_CONSTANT_MethodHandle: { |
| 1608 *bytes = JVM_CONSTANT_MethodHandle; | |
| 1609 int kind = method_handle_ref_kind_at(idx); | |
| 1610 idx1 = method_handle_index_at(idx); | |
| 1611 *(bytes+1) = (unsigned char) kind; | |
| 1612 Bytes::put_Java_u2((address) (bytes+2), idx1); | |
| 1613 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1)); | |
| 1614 break; | |
| 1615 } | |
| 1616 case JVM_CONSTANT_MethodType: { | |
| 1617 *bytes = JVM_CONSTANT_MethodType; | |
| 1618 idx1 = method_type_index_at(idx); | |
| 1619 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1620 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1)); | |
| 1621 break; | |
| 1622 } | |
|
1660
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|
1623 case JVM_CONSTANT_InvokeDynamic: { |
|
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diff
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|
1624 *bytes = JVM_CONSTANT_InvokeDynamic; |
|
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|
1625 idx1 = invoke_dynamic_bootstrap_method_ref_index_at(idx); |
|
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|
1626 idx2 = invoke_dynamic_name_and_type_ref_index_at(idx); |
|
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|
1627 int argc = invoke_dynamic_argument_count_at(idx); |
|
1660
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|
1628 Bytes::put_Java_u2((address) (bytes+1), idx1); |
|
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diff
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|
1629 Bytes::put_Java_u2((address) (bytes+3), idx2); |
|
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|
1630 Bytes::put_Java_u2((address) (bytes+5), argc); |
|
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|
1631 for (int arg_i = 0; arg_i < argc; arg_i++) { |
|
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|
1632 int arg = invoke_dynamic_argument_index_at(idx, arg_i); |
|
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|
1633 Bytes::put_Java_u2((address) (bytes+7+2*arg_i), arg); |
|
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|
1634 } |
|
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diff
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|
1635 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd [%d]", idx1, idx2, argc)); |
|
1660
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diff
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|
1636 break; |
|
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|
1637 } |
| 0 | 1638 } |
| 1639 DBG(printf("\n")); | |
| 1640 bytes += ent_size; | |
| 1641 size += ent_size; | |
| 1642 } | |
| 1643 assert(size == cpool_size, "Size mismatch"); | |
| 1644 | |
| 1645 // Keep temorarily for debugging until it's stable. | |
| 1646 DBG(print_cpool_bytes(cnt, start_bytes)); | |
| 1647 return (int)(bytes - start_bytes); | |
| 1648 } /* end copy_cpool_bytes */ | |
| 1649 | |
| 1650 | |
| 1651 void SymbolHashMap::add_entry(symbolOop sym, u2 value) { | |
| 1652 char *str = sym->as_utf8(); | |
| 1653 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
| 1654 unsigned int index = hash % table_size(); | |
| 1655 | |
| 1656 // check if already in map | |
| 1657 // we prefer the first entry since it is more likely to be what was used in | |
| 1658 // the class file | |
| 1659 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1660 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1661 if (en->hash() == hash && en->symbol() == sym) { | |
| 1662 return; // already there | |
| 1663 } | |
| 1664 } | |
| 1665 | |
| 1666 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
| 1667 entry->set_next(bucket(index)); | |
| 1668 _buckets[index].set_entry(entry); | |
| 1669 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1670 } | |
| 1671 | |
| 1672 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) { | |
| 1673 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); | |
| 1674 char *str = sym->as_utf8(); | |
| 1675 int len = sym->utf8_length(); | |
| 1676 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
| 1677 unsigned int index = hash % table_size(); | |
| 1678 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1679 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1680 if (en->hash() == hash && en->symbol() == sym) { | |
| 1681 return en; | |
| 1682 } | |
| 1683 } | |
| 1684 return NULL; | |
| 1685 } |