Mercurial > hg > truffle
annotate src/share/vm/oops/constantPoolOop.cpp @ 2252:72d6c57d0658
7017434: Tiered needs to support reprofiling
Summary: Tiered needs to support proper method reprofiling after deopts.
Reviewed-by: kvn
| author | iveresov |
|---|---|
| date | Wed, 09 Feb 2011 16:34:34 -0800 |
| parents | 3582bf76420e |
| children | fbbeec6dad2d |
| 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) { |
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55 // A resolved constantPool entry will contain a klassOop, otherwise a Symbol*. |
| 0 | 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. | |
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58 CPSlot entry = this_oop->slot_at(which); |
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59 if (entry.is_oop()) { |
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60 assert(entry.get_oop()->is_klass(), "must be"); |
| 0 | 61 // Already resolved - return entry. |
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62 return (klassOop)entry.get_oop(); |
| 0 | 63 } |
| 64 | |
| 65 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object | |
| 66 // already has updated the object | |
| 67 assert(THREAD->is_Java_thread(), "must be a Java thread"); | |
| 68 bool do_resolve = false; | |
| 69 bool in_error = false; | |
| 70 | |
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71 Symbol* name = NULL; |
| 0 | 72 Handle loader; |
| 73 { ObjectLocker ol(this_oop, THREAD); | |
| 74 | |
| 75 if (this_oop->tag_at(which).is_unresolved_klass()) { | |
| 76 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
| 77 in_error = true; | |
| 78 } else { | |
| 79 do_resolve = true; | |
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80 name = this_oop->unresolved_klass_at(which); |
| 0 | 81 loader = Handle(THREAD, instanceKlass::cast(this_oop->pool_holder())->class_loader()); |
| 82 } | |
| 83 } | |
| 84 } // unlocking constantPool | |
| 85 | |
| 86 | |
| 87 // The original attempt to resolve this constant pool entry failed so find the | |
| 88 // original error and throw it again (JVMS 5.4.3). | |
| 89 if (in_error) { | |
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90 Symbol* error = SystemDictionary::find_resolution_error(this_oop, which); |
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91 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
| 0 | 92 ResourceMark rm; |
| 93 // exception text will be the class name | |
| 94 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
| 95 THROW_MSG_0(error, className); | |
| 96 } | |
| 97 | |
| 98 if (do_resolve) { | |
| 99 // this_oop must be unlocked during resolve_or_fail | |
| 100 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 101 Handle h_prot (THREAD, protection_domain); | |
| 102 klassOop k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); | |
| 103 KlassHandle k; | |
| 104 if (!HAS_PENDING_EXCEPTION) { | |
| 105 k = KlassHandle(THREAD, k_oop); | |
| 106 // Do access check for klasses | |
| 107 verify_constant_pool_resolve(this_oop, k, THREAD); | |
| 108 } | |
| 109 | |
| 110 // Failed to resolve class. We must record the errors so that subsequent attempts | |
| 111 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). | |
| 112 if (HAS_PENDING_EXCEPTION) { | |
| 113 ResourceMark rm; | |
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114 Symbol* error = PENDING_EXCEPTION->klass()->klass_part()->name(); |
| 0 | 115 |
| 116 bool throw_orig_error = false; | |
| 117 { | |
| 118 ObjectLocker ol (this_oop, THREAD); | |
| 119 | |
| 120 // some other thread has beaten us and has resolved the class. | |
| 121 if (this_oop->tag_at(which).is_klass()) { | |
| 122 CLEAR_PENDING_EXCEPTION; | |
| 123 entry = this_oop->resolved_klass_at(which); | |
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124 return (klassOop)entry.get_oop(); |
| 0 | 125 } |
| 126 | |
| 127 if (!PENDING_EXCEPTION-> | |
| 1142 | 128 is_a(SystemDictionary::LinkageError_klass())) { |
| 0 | 129 // Just throw the exception and don't prevent these classes from |
| 130 // being loaded due to virtual machine errors like StackOverflow | |
| 131 // and OutOfMemoryError, etc, or if the thread was hit by stop() | |
| 132 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) | |
| 133 } | |
| 134 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
| 135 SystemDictionary::add_resolution_error(this_oop, which, error); | |
| 136 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); | |
| 137 } else { | |
| 138 // some other thread has put the class in error state. | |
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139 error = SystemDictionary::find_resolution_error(this_oop, which); |
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140 assert(error != NULL, "checking"); |
| 0 | 141 throw_orig_error = true; |
| 142 } | |
| 143 } // unlocked | |
| 144 | |
| 145 if (throw_orig_error) { | |
| 146 CLEAR_PENDING_EXCEPTION; | |
| 147 ResourceMark rm; | |
| 148 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
| 149 THROW_MSG_0(error, className); | |
| 150 } | |
| 151 | |
| 152 return 0; | |
| 153 } | |
| 154 | |
| 155 if (TraceClassResolution && !k()->klass_part()->oop_is_array()) { | |
| 156 // skip resolving the constant pool so that this code get's | |
| 157 // called the next time some bytecodes refer to this class. | |
| 158 ResourceMark rm; | |
| 159 int line_number = -1; | |
| 160 const char * source_file = NULL; | |
| 161 if (JavaThread::current()->has_last_Java_frame()) { | |
| 162 // try to identify the method which called this function. | |
| 163 vframeStream vfst(JavaThread::current()); | |
| 164 if (!vfst.at_end()) { | |
| 165 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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166 Symbol* s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); |
| 0 | 167 if (s != NULL) { |
| 168 source_file = s->as_C_string(); | |
| 169 } | |
| 170 } | |
| 171 } | |
| 172 if (k() != this_oop->pool_holder()) { | |
| 173 // only print something if the classes are different | |
| 174 if (source_file != NULL) { | |
| 175 tty->print("RESOLVE %s %s %s:%d\n", | |
| 176 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
| 177 instanceKlass::cast(k())->external_name(), source_file, line_number); | |
| 178 } else { | |
| 179 tty->print("RESOLVE %s %s\n", | |
| 180 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
| 181 instanceKlass::cast(k())->external_name()); | |
| 182 } | |
| 183 } | |
| 184 return k(); | |
| 185 } else { | |
| 186 ObjectLocker ol (this_oop, THREAD); | |
| 187 // Only updated constant pool - if it is resolved. | |
| 188 do_resolve = this_oop->tag_at(which).is_unresolved_klass(); | |
| 189 if (do_resolve) { | |
| 190 this_oop->klass_at_put(which, k()); | |
| 191 } | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 entry = this_oop->resolved_klass_at(which); | |
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196 assert(entry.is_oop() && entry.get_oop()->is_klass(), "must be resolved at this point"); |
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197 return (klassOop)entry.get_oop(); |
| 0 | 198 } |
| 199 | |
| 200 | |
| 201 // Does not update constantPoolOop - to avoid any exception throwing. Used | |
| 202 // by compiler and exception handling. Also used to avoid classloads for | |
| 203 // instanceof operations. Returns NULL if the class has not been loaded or | |
| 204 // if the verification of constant pool failed | |
| 205 klassOop constantPoolOopDesc::klass_at_if_loaded(constantPoolHandle this_oop, int which) { | |
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206 CPSlot entry = this_oop->slot_at(which); |
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207 if (entry.is_oop()) { |
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208 assert(entry.get_oop()->is_klass(), "must be"); |
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209 return (klassOop)entry.get_oop(); |
| 0 | 210 } else { |
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211 assert(entry.is_metadata(), "must be either symbol or klass"); |
| 0 | 212 Thread *thread = Thread::current(); |
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213 Symbol* name = entry.get_symbol(); |
| 0 | 214 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); |
| 215 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 216 Handle h_prot (thread, protection_domain); | |
| 217 Handle h_loader (thread, loader); | |
| 218 klassOop k = SystemDictionary::find(name, h_loader, h_prot, thread); | |
| 219 | |
| 220 if (k != NULL) { | |
| 221 // Make sure that resolving is legal | |
| 222 EXCEPTION_MARK; | |
| 223 KlassHandle klass(THREAD, k); | |
| 224 // return NULL if verification fails | |
| 225 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
| 226 if (HAS_PENDING_EXCEPTION) { | |
| 227 CLEAR_PENDING_EXCEPTION; | |
| 228 return NULL; | |
| 229 } | |
| 230 return klass(); | |
| 231 } else { | |
| 232 return k; | |
| 233 } | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 | |
| 238 klassOop constantPoolOopDesc::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { | |
| 239 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); | |
| 240 } | |
| 241 | |
| 242 | |
| 243 // This is an interface for the compiler that allows accessing non-resolved entries | |
| 244 // in the constant pool - but still performs the validations tests. Must be used | |
| 245 // in a pre-parse of the compiler - to determine what it can do and not do. | |
| 246 // Note: We cannot update the ConstantPool from the vm_thread. | |
| 247 klassOop constantPoolOopDesc::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { | |
| 248 int which = this_oop->klass_ref_index_at(index); | |
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249 CPSlot entry = this_oop->slot_at(which); |
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250 if (entry.is_oop()) { |
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251 assert(entry.get_oop()->is_klass(), "must be"); |
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252 return (klassOop)entry.get_oop(); |
| 0 | 253 } else { |
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254 assert(entry.is_metadata(), "must be either symbol or klass"); |
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255 Symbol* name = entry.get_symbol(); |
| 0 | 256 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); |
| 257 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 258 Handle h_loader(THREAD, loader); | |
| 259 Handle h_prot (THREAD, protection_domain); | |
| 260 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
| 261 | |
| 262 // Do access check for klasses | |
| 263 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
| 264 return k(); | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 | |
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269 Symbol* constantPoolOopDesc::impl_name_ref_at(int which, bool uncached) { |
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270 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
| 0 | 271 return symbol_at(name_index); |
| 272 } | |
| 273 | |
| 274 | |
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275 Symbol* constantPoolOopDesc::impl_signature_ref_at(int which, bool uncached) { |
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276 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
| 0 | 277 return symbol_at(signature_index); |
| 278 } | |
| 279 | |
| 280 | |
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281 int constantPoolOopDesc::impl_name_and_type_ref_index_at(int which, bool uncached) { |
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282 int i = which; |
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283 if (!uncached && cache() != NULL) { |
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284 if (constantPoolCacheOopDesc::is_secondary_index(which)) { |
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285 // Invokedynamic index. |
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286 int pool_index = cache()->main_entry_at(which)->constant_pool_index(); |
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287 if (!AllowTransitionalJSR292 || tag_at(pool_index).is_invoke_dynamic()) |
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288 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index); |
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289 assert(tag_at(pool_index).is_name_and_type(), ""); |
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290 return pool_index; |
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291 } |
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292 // change byte-ordering and go via cache |
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293 i = remap_instruction_operand_from_cache(which); |
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294 } else { |
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295 if (AllowTransitionalJSR292 && tag_at(which).is_name_and_type()) |
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296 // invokedynamic index is a simple name-and-type |
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297 return which; |
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298 if (tag_at(which).is_invoke_dynamic()) { |
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299 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which); |
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300 assert(tag_at(pool_index).is_name_and_type(), ""); |
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301 return pool_index; |
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302 } |
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303 } |
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304 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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305 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above"); |
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306 jint ref_index = *int_at_addr(i); |
| 0 | 307 return extract_high_short_from_int(ref_index); |
| 308 } | |
| 309 | |
| 310 | |
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311 int constantPoolOopDesc::impl_klass_ref_index_at(int which, bool uncached) { |
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312 guarantee(!constantPoolCacheOopDesc::is_secondary_index(which), |
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313 "an invokedynamic instruction does not have a klass"); |
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314 int i = which; |
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315 if (!uncached && cache() != NULL) { |
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316 // change byte-ordering and go via cache |
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317 i = remap_instruction_operand_from_cache(which); |
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318 } |
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319 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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320 jint ref_index = *int_at_addr(i); |
| 0 | 321 return extract_low_short_from_int(ref_index); |
| 322 } | |
| 323 | |
| 324 | |
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325 |
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326 int constantPoolOopDesc::remap_instruction_operand_from_cache(int operand) { |
| 1565 | 327 int cpc_index = operand; |
| 328 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG); | |
| 329 assert((int)(u2)cpc_index == cpc_index, "clean u2"); | |
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330 int member_index = cache()->entry_at(cpc_index)->constant_pool_index(); |
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331 return member_index; |
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332 } |
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333 |
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334 |
| 0 | 335 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
| 336 if (k->oop_is_instance() || k->oop_is_objArray()) { | |
| 337 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
| 338 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); | |
| 339 KlassHandle element (THREAD, elem_oop); | |
| 340 | |
| 341 // The element type could be a typeArray - we only need the access check if it is | |
| 342 // an reference to another class | |
| 343 if (element->oop_is_instance()) { | |
| 344 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
| 345 } | |
| 346 } | |
| 347 } | |
| 348 | |
| 349 | |
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350 int constantPoolOopDesc::name_ref_index_at(int which_nt) { |
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351 jint ref_index = name_and_type_at(which_nt); |
| 0 | 352 return extract_low_short_from_int(ref_index); |
| 353 } | |
| 354 | |
| 355 | |
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356 int constantPoolOopDesc::signature_ref_index_at(int which_nt) { |
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357 jint ref_index = name_and_type_at(which_nt); |
| 0 | 358 return extract_high_short_from_int(ref_index); |
| 359 } | |
| 360 | |
| 361 | |
| 362 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { | |
| 363 return klass_at(klass_ref_index_at(which), CHECK_NULL); | |
| 364 } | |
| 365 | |
| 366 | |
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367 Symbol* constantPoolOopDesc::klass_name_at(int which) { |
| 0 | 368 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), |
| 369 "Corrupted constant pool"); | |
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370 // A resolved constantPool entry will contain a klassOop, otherwise a Symbol*. |
| 0 | 371 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
| 372 // tag is not updated atomicly. | |
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373 CPSlot entry = slot_at(which); |
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374 if (entry.is_oop()) { |
| 0 | 375 // Already resolved - return entry's name. |
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376 assert(entry.get_oop()->is_klass(), "must be"); |
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377 return klassOop(entry.get_oop())->klass_part()->name(); |
| 0 | 378 } else { |
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379 assert(entry.is_metadata(), "must be either symbol or klass"); |
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380 return entry.get_symbol(); |
| 0 | 381 } |
| 382 } | |
| 383 | |
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384 Symbol* constantPoolOopDesc::klass_ref_at_noresolve(int which) { |
| 0 | 385 jint ref_index = klass_ref_index_at(which); |
| 386 return klass_at_noresolve(ref_index); | |
| 387 } | |
| 388 | |
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389 Symbol* constantPoolOopDesc::uncached_klass_ref_at_noresolve(int which) { |
| 1602 | 390 jint ref_index = uncached_klass_ref_index_at(which); |
| 391 return klass_at_noresolve(ref_index); | |
| 392 } | |
| 393 | |
| 0 | 394 char* constantPoolOopDesc::string_at_noresolve(int which) { |
| 395 // Test entry type in case string is resolved while in here. | |
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396 CPSlot entry = slot_at(which); |
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397 if (entry.is_metadata()) { |
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398 return (entry.get_symbol())->as_C_string(); |
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399 } else if (java_lang_String::is_instance(entry.get_oop())) { |
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400 return java_lang_String::as_utf8_string(entry.get_oop()); |
| 0 | 401 } else { |
|
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402 return (char*)"<pseudo-string>"; |
| 0 | 403 } |
| 404 } | |
| 405 | |
| 406 | |
| 407 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { | |
| 408 return FieldType::basic_type(symbol_at(which)); | |
| 409 } | |
| 410 | |
| 411 | |
| 412 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { | |
| 413 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused | |
| 414 if (this_oop->tag_at(index).is_unresolved_string()) { | |
| 415 this_oop->string_at(index, CHECK); | |
| 416 } | |
| 417 } | |
| 418 } | |
| 419 | |
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420 // A resolved constant value in the CP cache is represented as a non-null |
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421 // value. As a special case, this value can be a 'systemObjArray' |
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422 // which masks an exception object to throw. |
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423 // This allows a MethodHandle constant reference to throw a consistent |
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424 // exception every time, if it fails to resolve. |
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425 static oop decode_exception_from_f1(oop result_oop, TRAPS) { |
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426 if (result_oop->klass() != Universe::systemObjArrayKlassObj()) |
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427 return result_oop; |
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428 |
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429 // Special cases here: Masked null, saved exception. |
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430 objArrayOop sys_array = (objArrayOop) result_oop; |
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431 assert(sys_array->length() == 1, "bad system array"); |
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432 if (sys_array->length() == 1) { |
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433 THROW_OOP_(sys_array->obj_at(0), NULL); |
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434 } |
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435 return NULL; |
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436 } |
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437 |
| 1602 | 438 oop constantPoolOopDesc::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) { |
| 439 oop result_oop = NULL; | |
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440 Handle throw_exception; |
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441 |
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442 if (cache_index == _possible_index_sentinel) { |
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443 // It is possible that this constant is one which is cached in the CP cache. |
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444 // We'll do a linear search. This should be OK because this usage is rare. |
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445 assert(index > 0, "valid index"); |
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446 constantPoolCacheOop cache = this_oop()->cache(); |
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447 for (int i = 0, len = cache->length(); i < len; i++) { |
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448 ConstantPoolCacheEntry* cpc_entry = cache->entry_at(i); |
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449 if (!cpc_entry->is_secondary_entry() && cpc_entry->constant_pool_index() == index) { |
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450 // Switch the query to use this CPC entry. |
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451 cache_index = i; |
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452 index = _no_index_sentinel; |
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453 break; |
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454 } |
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455 } |
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456 if (cache_index == _possible_index_sentinel) |
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457 cache_index = _no_index_sentinel; // not found |
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458 } |
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459 assert(cache_index == _no_index_sentinel || cache_index >= 0, ""); |
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460 assert(index == _no_index_sentinel || index >= 0, ""); |
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461 |
| 1602 | 462 if (cache_index >= 0) { |
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463 assert(index == _no_index_sentinel, "only one kind of index at a time"); |
| 1602 | 464 ConstantPoolCacheEntry* cpc_entry = this_oop->cache()->entry_at(cache_index); |
| 465 result_oop = cpc_entry->f1(); | |
| 466 if (result_oop != NULL) { | |
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467 return decode_exception_from_f1(result_oop, THREAD); |
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468 // That was easy... |
| 1602 | 469 } |
| 470 index = cpc_entry->constant_pool_index(); | |
| 471 } | |
| 472 | |
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473 jvalue prim_value; // temp used only in a few cases below |
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474 |
| 1602 | 475 int tag_value = this_oop->tag_at(index).value(); |
| 476 switch (tag_value) { | |
| 477 | |
| 478 case JVM_CONSTANT_UnresolvedClass: | |
| 479 case JVM_CONSTANT_UnresolvedClassInError: | |
| 480 case JVM_CONSTANT_Class: | |
| 481 { | |
| 482 klassOop resolved = klass_at_impl(this_oop, index, CHECK_NULL); | |
| 483 // ldc wants the java mirror. | |
| 484 result_oop = resolved->klass_part()->java_mirror(); | |
| 485 break; | |
| 486 } | |
| 487 | |
| 488 case JVM_CONSTANT_String: | |
| 489 case JVM_CONSTANT_UnresolvedString: | |
| 490 if (this_oop->is_pseudo_string_at(index)) { | |
| 491 result_oop = this_oop->pseudo_string_at(index); | |
| 492 break; | |
| 493 } | |
| 494 result_oop = string_at_impl(this_oop, index, CHECK_NULL); | |
| 495 break; | |
| 496 | |
| 497 case JVM_CONSTANT_Object: | |
| 498 result_oop = this_oop->object_at(index); | |
| 499 break; | |
| 500 | |
| 501 case JVM_CONSTANT_MethodHandle: | |
| 502 { | |
| 503 int ref_kind = this_oop->method_handle_ref_kind_at(index); | |
| 504 int callee_index = this_oop->method_handle_klass_index_at(index); | |
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505 Symbol* name = this_oop->method_handle_name_ref_at(index); |
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506 Symbol* signature = this_oop->method_handle_signature_ref_at(index); |
| 1602 | 507 if (PrintMiscellaneous) |
| 508 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s", | |
| 509 ref_kind, index, this_oop->method_handle_index_at(index), | |
| 510 callee_index, name->as_C_string(), signature->as_C_string()); | |
| 511 KlassHandle callee; | |
| 512 { klassOop k = klass_at_impl(this_oop, callee_index, CHECK_NULL); | |
| 513 callee = KlassHandle(THREAD, k); | |
| 514 } | |
| 515 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
| 516 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind, | |
| 517 callee, name, signature, | |
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518 THREAD); |
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519 if (HAS_PENDING_EXCEPTION) { |
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520 throw_exception = Handle(THREAD, PENDING_EXCEPTION); |
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521 CLEAR_PENDING_EXCEPTION; |
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522 break; |
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523 } |
| 1602 | 524 result_oop = value(); |
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525 assert(result_oop != NULL, ""); |
| 1602 | 526 break; |
| 527 } | |
| 528 | |
| 529 case JVM_CONSTANT_MethodType: | |
| 530 { | |
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531 Symbol* signature = this_oop->method_type_signature_at(index); |
| 1602 | 532 if (PrintMiscellaneous) |
| 533 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s", | |
| 534 index, this_oop->method_type_index_at(index), | |
| 535 signature->as_C_string()); | |
| 536 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
| 537 bool ignore_is_on_bcp = false; | |
| 538 Handle value = SystemDictionary::find_method_handle_type(signature, | |
| 539 klass, | |
|
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540 false, |
| 1602 | 541 ignore_is_on_bcp, |
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542 THREAD); |
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543 if (HAS_PENDING_EXCEPTION) { |
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544 throw_exception = Handle(THREAD, PENDING_EXCEPTION); |
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545 CLEAR_PENDING_EXCEPTION; |
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546 break; |
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547 } |
| 1602 | 548 result_oop = value(); |
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549 assert(result_oop != NULL, ""); |
| 1602 | 550 break; |
| 551 } | |
| 552 | |
| 553 case JVM_CONSTANT_Integer: | |
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554 prim_value.i = this_oop->int_at(index); |
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555 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL); |
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556 break; |
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557 |
| 1602 | 558 case JVM_CONSTANT_Float: |
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559 prim_value.f = this_oop->float_at(index); |
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560 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL); |
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561 break; |
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562 |
| 1602 | 563 case JVM_CONSTANT_Long: |
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564 prim_value.j = this_oop->long_at(index); |
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565 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL); |
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566 break; |
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567 |
| 1602 | 568 case JVM_CONSTANT_Double: |
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569 prim_value.d = this_oop->double_at(index); |
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570 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL); |
| 1602 | 571 break; |
| 572 | |
| 573 default: | |
| 574 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d", | |
| 575 this_oop(), index, cache_index, tag_value) ); | |
| 576 assert(false, "unexpected constant tag"); | |
| 577 break; | |
| 578 } | |
| 579 | |
| 580 if (cache_index >= 0) { | |
| 581 // Cache the oop here also. | |
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582 if (throw_exception.not_null()) { |
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583 objArrayOop sys_array = oopFactory::new_system_objArray(1, CHECK_NULL); |
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584 sys_array->obj_at_put(0, throw_exception()); |
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585 result_oop = sys_array; |
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586 throw_exception = Handle(); // be tidy |
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587 } |
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588 Handle result_handle(THREAD, result_oop); |
| 1602 | 589 result_oop = NULL; // safety |
| 590 ObjectLocker ol(this_oop, THREAD); | |
| 591 ConstantPoolCacheEntry* cpc_entry = this_oop->cache()->entry_at(cache_index); | |
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592 result_oop = cpc_entry->f1(); |
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593 // Benign race condition: f1 may already be filled in while we were trying to lock. |
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594 // The important thing here is that all threads pick up the same result. |
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595 // It doesn't matter which racing thread wins, as long as only one |
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596 // result is used by all threads, and all future queries. |
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597 // That result may be either a resolved constant or a failure exception. |
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598 if (result_oop == NULL) { |
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599 result_oop = result_handle(); |
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600 cpc_entry->set_f1(result_oop); |
| 1602 | 601 } |
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602 return decode_exception_from_f1(result_oop, THREAD); |
| 1602 | 603 } else { |
|
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604 if (throw_exception.not_null()) { |
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605 THROW_HANDLE_(throw_exception, NULL); |
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606 } |
| 1602 | 607 return result_oop; |
| 608 } | |
| 609 } | |
| 610 | |
| 0 | 611 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
|
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612 oop str = NULL; |
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613 CPSlot entry = this_oop->slot_at(which); |
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614 if (entry.is_metadata()) { |
| 0 | 615 ObjectLocker ol(this_oop, THREAD); |
| 616 if (this_oop->tag_at(which).is_unresolved_string()) { | |
| 617 // Intern string | |
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618 Symbol* sym = this_oop->unresolved_string_at(which); |
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619 str = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); |
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620 this_oop->string_at_put(which, str); |
| 0 | 621 } else { |
| 622 // Another thread beat us and interned string, read string from constant pool | |
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623 str = this_oop->resolved_string_at(which); |
| 0 | 624 } |
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625 } else { |
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626 str = entry.get_oop(); |
| 0 | 627 } |
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628 assert(java_lang_String::is_instance(str), "must be string"); |
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629 return str; |
| 0 | 630 } |
| 631 | |
| 632 | |
|
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633 bool constantPoolOopDesc::is_pseudo_string_at(int which) { |
|
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634 CPSlot entry = slot_at(which); |
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635 if (entry.is_metadata()) |
|
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636 // Not yet resolved, but it will resolve to a string. |
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637 return false; |
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638 else if (java_lang_String::is_instance(entry.get_oop())) |
|
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639 return false; // actually, it might be a non-interned or non-perm string |
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640 else |
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641 // truly pseudo |
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642 return true; |
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643 } |
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644 |
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645 |
| 0 | 646 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, |
| 647 int which) { | |
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648 // Names are interned, so we can compare Symbol*s directly |
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649 Symbol* cp_name = klass_name_at(which); |
| 0 | 650 return (cp_name == k->name()); |
| 651 } | |
| 652 | |
| 653 | |
| 654 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { | |
| 655 ResourceMark rm; | |
| 656 int count = 0; | |
| 657 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused | |
| 658 if (tag_at(index).is_unresolved_string()) { | |
| 659 // Intern string | |
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660 Symbol* sym = unresolved_string_at(index); |
| 0 | 661 oop entry = StringTable::intern(sym, CHECK_(-1)); |
| 662 string_at_put(index, entry); | |
| 663 } | |
| 664 } | |
| 665 return count; | |
| 666 } | |
| 667 | |
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668 // Iterate over symbols and decrement ones which are Symbol*s. |
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669 // This is done during GC so do not need to lock constantPool unless we |
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670 // have per-thread safepoints. |
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671 // Only decrement the UTF8 symbols. Unresolved classes and strings point to |
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672 // these symbols but didn't increment the reference count. |
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673 void constantPoolOopDesc::unreference_symbols() { |
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674 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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675 constantTag tag = tag_at(index); |
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676 if (tag.is_symbol()) { |
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677 symbol_at(index)->decrement_refcount(); |
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678 } |
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679 } |
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680 } |
| 0 | 681 |
| 682 // Iterate over symbols which are used as class, field, method names and | |
| 683 // signatures (in preparation for writing to the shared archive). | |
| 684 | |
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685 void constantPoolOopDesc::shared_symbols_iterate(SymbolClosure* closure) { |
| 0 | 686 for (int index = 1; index < length(); index++) { // Index 0 is unused |
| 687 switch (tag_at(index).value()) { | |
| 688 | |
| 689 case JVM_CONSTANT_UnresolvedClass: | |
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690 case JVM_CONSTANT_UnresolvedString: |
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691 case JVM_CONSTANT_Utf8: |
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692 assert(slot_at(index).is_metadata(), "must be symbol"); |
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693 closure->do_symbol(symbol_at_addr(index)); |
| 0 | 694 break; |
| 695 | |
| 696 case JVM_CONSTANT_NameAndType: | |
| 697 { | |
| 698 int i = *int_at_addr(index); | |
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699 closure->do_symbol(symbol_at_addr((unsigned)i >> 16)); |
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700 closure->do_symbol(symbol_at_addr((unsigned)i & 0xffff)); |
| 0 | 701 } |
| 702 break; | |
| 703 | |
| 704 case JVM_CONSTANT_Class: | |
| 705 case JVM_CONSTANT_InterfaceMethodref: | |
| 706 case JVM_CONSTANT_Fieldref: | |
| 707 case JVM_CONSTANT_Methodref: | |
| 708 case JVM_CONSTANT_Integer: | |
| 709 case JVM_CONSTANT_Float: | |
| 710 // Do nothing! Not an oop. | |
| 711 // These constant types do not reference symbols at this point. | |
| 712 break; | |
| 713 | |
| 714 case JVM_CONSTANT_String: | |
| 715 // Do nothing! Not a symbol. | |
| 716 break; | |
| 717 | |
| 718 case JVM_CONSTANT_Long: | |
| 719 case JVM_CONSTANT_Double: | |
| 720 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 721 ++index; | |
| 722 break; | |
| 723 | |
| 724 default: | |
| 725 ShouldNotReachHere(); | |
| 726 break; | |
| 727 } | |
| 728 } | |
| 729 } | |
| 730 | |
| 731 | |
| 732 // Iterate over the [one] tags array (in preparation for writing to the | |
| 733 // shared archive). | |
| 734 | |
| 735 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { | |
| 736 closure->do_oop(tags_addr()); | |
|
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737 closure->do_oop(operands_addr()); |
| 0 | 738 } |
| 739 | |
| 740 | |
| 741 // Iterate over String objects (in preparation for writing to the shared | |
| 742 // archive). | |
| 743 | |
| 744 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { | |
| 745 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
| 746 switch (tag_at(index).value()) { | |
| 747 | |
| 748 case JVM_CONSTANT_UnresolvedClass: | |
| 749 case JVM_CONSTANT_NameAndType: | |
| 750 // Do nothing! Not a String. | |
| 751 break; | |
| 752 | |
| 753 case JVM_CONSTANT_Class: | |
| 754 case JVM_CONSTANT_InterfaceMethodref: | |
| 755 case JVM_CONSTANT_Fieldref: | |
| 756 case JVM_CONSTANT_Methodref: | |
| 757 case JVM_CONSTANT_Integer: | |
| 758 case JVM_CONSTANT_Float: | |
| 759 // Do nothing! Not an oop. | |
| 760 // These constant types do not reference symbols at this point. | |
| 761 break; | |
| 762 | |
| 763 case JVM_CONSTANT_String: | |
|
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764 closure->do_oop(obj_at_addr_raw(index)); |
| 0 | 765 break; |
| 766 | |
| 767 case JVM_CONSTANT_UnresolvedString: | |
| 768 case JVM_CONSTANT_Utf8: | |
| 769 // These constants are symbols, but unless these symbols are | |
| 770 // actually to be used for something, we don't want to mark them. | |
| 771 break; | |
| 772 | |
| 773 case JVM_CONSTANT_Long: | |
| 774 case JVM_CONSTANT_Double: | |
| 775 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 776 ++index; | |
| 777 break; | |
| 778 | |
| 779 default: | |
| 780 ShouldNotReachHere(); | |
| 781 break; | |
| 782 } | |
| 783 } | |
| 784 } | |
| 785 | |
| 786 | |
| 787 // Compare this constant pool's entry at index1 to the constant pool | |
| 788 // cp2's entry at index2. | |
| 789 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, | |
| 790 int index2, TRAPS) { | |
| 791 | |
| 792 jbyte t1 = tag_at(index1).value(); | |
| 793 jbyte t2 = cp2->tag_at(index2).value(); | |
| 794 | |
| 795 | |
| 796 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
| 797 // when comparing | |
| 798 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 799 t1 = JVM_CONSTANT_UnresolvedClass; | |
| 800 } | |
| 801 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 802 t2 = JVM_CONSTANT_UnresolvedClass; | |
| 803 } | |
| 804 | |
| 805 if (t1 != t2) { | |
| 806 // Not the same entry type so there is nothing else to check. Note | |
| 807 // that this style of checking will consider resolved/unresolved | |
| 808 // class pairs and resolved/unresolved string pairs as different. | |
| 809 // From the constantPoolOop API point of view, this is correct | |
| 810 // behavior. See constantPoolKlass::merge() to see how this plays | |
| 811 // out in the context of constantPoolOop merging. | |
| 812 return false; | |
| 813 } | |
| 814 | |
| 815 switch (t1) { | |
| 816 case JVM_CONSTANT_Class: | |
| 817 { | |
| 818 klassOop k1 = klass_at(index1, CHECK_false); | |
| 819 klassOop k2 = cp2->klass_at(index2, CHECK_false); | |
| 820 if (k1 == k2) { | |
| 821 return true; | |
| 822 } | |
| 823 } break; | |
| 824 | |
| 825 case JVM_CONSTANT_ClassIndex: | |
| 826 { | |
| 827 int recur1 = klass_index_at(index1); | |
| 828 int recur2 = cp2->klass_index_at(index2); | |
| 829 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 830 if (match) { | |
| 831 return true; | |
| 832 } | |
| 833 } break; | |
| 834 | |
| 835 case JVM_CONSTANT_Double: | |
| 836 { | |
| 837 jdouble d1 = double_at(index1); | |
| 838 jdouble d2 = cp2->double_at(index2); | |
| 839 if (d1 == d2) { | |
| 840 return true; | |
| 841 } | |
| 842 } break; | |
| 843 | |
| 844 case JVM_CONSTANT_Fieldref: | |
| 845 case JVM_CONSTANT_InterfaceMethodref: | |
| 846 case JVM_CONSTANT_Methodref: | |
| 847 { | |
| 848 int recur1 = uncached_klass_ref_index_at(index1); | |
| 849 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
| 850 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 851 if (match) { | |
| 852 recur1 = uncached_name_and_type_ref_index_at(index1); | |
| 853 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
| 854 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 855 if (match) { | |
| 856 return true; | |
| 857 } | |
| 858 } | |
| 859 } break; | |
| 860 | |
| 861 case JVM_CONSTANT_Float: | |
| 862 { | |
| 863 jfloat f1 = float_at(index1); | |
| 864 jfloat f2 = cp2->float_at(index2); | |
| 865 if (f1 == f2) { | |
| 866 return true; | |
| 867 } | |
| 868 } break; | |
| 869 | |
| 870 case JVM_CONSTANT_Integer: | |
| 871 { | |
| 872 jint i1 = int_at(index1); | |
| 873 jint i2 = cp2->int_at(index2); | |
| 874 if (i1 == i2) { | |
| 875 return true; | |
| 876 } | |
| 877 } break; | |
| 878 | |
| 879 case JVM_CONSTANT_Long: | |
| 880 { | |
| 881 jlong l1 = long_at(index1); | |
| 882 jlong l2 = cp2->long_at(index2); | |
| 883 if (l1 == l2) { | |
| 884 return true; | |
| 885 } | |
| 886 } break; | |
| 887 | |
| 888 case JVM_CONSTANT_NameAndType: | |
| 889 { | |
| 890 int recur1 = name_ref_index_at(index1); | |
| 891 int recur2 = cp2->name_ref_index_at(index2); | |
| 892 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 893 if (match) { | |
| 894 recur1 = signature_ref_index_at(index1); | |
| 895 recur2 = cp2->signature_ref_index_at(index2); | |
| 896 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 897 if (match) { | |
| 898 return true; | |
| 899 } | |
| 900 } | |
| 901 } break; | |
| 902 | |
| 903 case JVM_CONSTANT_String: | |
| 904 { | |
| 905 oop s1 = string_at(index1, CHECK_false); | |
| 906 oop s2 = cp2->string_at(index2, CHECK_false); | |
| 907 if (s1 == s2) { | |
| 908 return true; | |
| 909 } | |
| 910 } break; | |
| 911 | |
| 912 case JVM_CONSTANT_StringIndex: | |
| 913 { | |
| 914 int recur1 = string_index_at(index1); | |
| 915 int recur2 = cp2->string_index_at(index2); | |
| 916 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 917 if (match) { | |
| 918 return true; | |
| 919 } | |
| 920 } break; | |
| 921 | |
| 922 case JVM_CONSTANT_UnresolvedClass: | |
| 923 { | |
|
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924 Symbol* k1 = unresolved_klass_at(index1); |
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925 Symbol* k2 = cp2->unresolved_klass_at(index2); |
| 0 | 926 if (k1 == k2) { |
| 927 return true; | |
| 928 } | |
| 929 } break; | |
| 930 | |
| 1602 | 931 case JVM_CONSTANT_MethodType: |
| 932 { | |
| 933 int k1 = method_type_index_at(index1); | |
| 934 int k2 = cp2->method_type_index_at(index2); | |
|
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935 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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936 if (match) { |
| 1602 | 937 return true; |
| 938 } | |
| 939 } break; | |
| 940 | |
| 941 case JVM_CONSTANT_MethodHandle: | |
| 942 { | |
| 943 int k1 = method_handle_ref_kind_at(index1); | |
| 944 int k2 = cp2->method_handle_ref_kind_at(index2); | |
| 945 if (k1 == k2) { | |
| 946 int i1 = method_handle_index_at(index1); | |
| 947 int i2 = cp2->method_handle_index_at(index2); | |
|
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948 bool match = compare_entry_to(i1, cp2, i2, CHECK_false); |
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949 if (match) { |
| 1602 | 950 return true; |
| 951 } | |
| 952 } | |
| 953 } break; | |
| 954 | |
|
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955 case JVM_CONSTANT_InvokeDynamic: |
|
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956 case JVM_CONSTANT_InvokeDynamicTrans: |
|
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957 { |
|
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958 int k1 = invoke_dynamic_bootstrap_method_ref_index_at(index1); |
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959 int k2 = cp2->invoke_dynamic_bootstrap_method_ref_index_at(index2); |
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960 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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961 if (!match) return false; |
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962 k1 = invoke_dynamic_name_and_type_ref_index_at(index1); |
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963 k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2); |
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964 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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965 if (!match) return false; |
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966 int argc = invoke_dynamic_argument_count_at(index1); |
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967 if (argc == cp2->invoke_dynamic_argument_count_at(index2)) { |
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968 for (int j = 0; j < argc; j++) { |
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969 k1 = invoke_dynamic_argument_index_at(index1, j); |
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970 k2 = cp2->invoke_dynamic_argument_index_at(index2, j); |
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971 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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972 if (!match) return false; |
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|
973 } |
|
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974 return true; // got through loop; all elements equal |
|
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|
975 } |
|
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|
976 } break; |
|
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|
977 |
| 0 | 978 case JVM_CONSTANT_UnresolvedString: |
| 979 { | |
|
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980 Symbol* s1 = unresolved_string_at(index1); |
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|
981 Symbol* s2 = cp2->unresolved_string_at(index2); |
| 0 | 982 if (s1 == s2) { |
| 983 return true; | |
| 984 } | |
| 985 } break; | |
| 986 | |
| 987 case JVM_CONSTANT_Utf8: | |
| 988 { | |
|
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989 Symbol* s1 = symbol_at(index1); |
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990 Symbol* s2 = cp2->symbol_at(index2); |
| 0 | 991 if (s1 == s2) { |
| 992 return true; | |
| 993 } | |
| 994 } break; | |
| 995 | |
| 996 // Invalid is used as the tag for the second constant pool entry | |
| 997 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 998 // not be seen by itself. | |
| 999 case JVM_CONSTANT_Invalid: // fall through | |
| 1000 | |
| 1001 default: | |
| 1002 ShouldNotReachHere(); | |
| 1003 break; | |
| 1004 } | |
| 1005 | |
| 1006 return false; | |
| 1007 } // end compare_entry_to() | |
| 1008 | |
| 1009 | |
| 1010 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
| 1011 // to the constant pool to_cp's entries starting at to_i. A total of | |
| 1012 // (end_i - start_i) + 1 entries are copied. | |
|
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1013 void constantPoolOopDesc::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i, |
| 0 | 1014 constantPoolHandle to_cp, int to_i, TRAPS) { |
| 1015 | |
| 1016 int dest_i = to_i; // leave original alone for debug purposes | |
| 1017 | |
|
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1018 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { |
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1019 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK); |
|
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1020 |
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1021 switch (from_cp->tag_at(src_i).value()) { |
| 0 | 1022 case JVM_CONSTANT_Double: |
| 1023 case JVM_CONSTANT_Long: | |
| 1024 // double and long take two constant pool entries | |
| 1025 src_i += 2; | |
| 1026 dest_i += 2; | |
| 1027 break; | |
| 1028 | |
| 1029 default: | |
| 1030 // all others take one constant pool entry | |
| 1031 src_i++; | |
| 1032 dest_i++; | |
| 1033 break; | |
| 1034 } | |
| 1035 } | |
|
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1036 |
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1037 int from_oplen = operand_array_length(from_cp->operands()); |
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1038 int old_oplen = operand_array_length(to_cp->operands()); |
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1039 if (from_oplen != 0) { |
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1040 // append my operands to the target's operands array |
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1041 if (old_oplen == 0) { |
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1042 to_cp->set_operands(from_cp->operands()); // reuse; do not merge |
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1043 } else { |
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1044 int old_len = to_cp->operands()->length(); |
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1045 int from_len = from_cp->operands()->length(); |
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1046 int old_off = old_oplen * sizeof(u2); |
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1047 int from_off = from_oplen * sizeof(u2); |
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1048 typeArrayHandle new_operands = oopFactory::new_permanent_shortArray(old_len + from_len, CHECK); |
|
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1049 int fillp = 0, len = 0; |
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1050 // first part of dest |
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1051 Copy::conjoint_memory_atomic(to_cp->operands()->short_at_addr(0), |
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1052 new_operands->short_at_addr(fillp), |
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1053 (len = old_off) * sizeof(u2)); |
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1054 fillp += len; |
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1055 // first part of src |
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1056 Copy::conjoint_memory_atomic(to_cp->operands()->short_at_addr(0), |
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1057 new_operands->short_at_addr(fillp), |
|
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1058 (len = from_off) * sizeof(u2)); |
|
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1059 fillp += len; |
|
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1060 // second part of dest |
|
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1061 Copy::conjoint_memory_atomic(to_cp->operands()->short_at_addr(old_off), |
|
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1062 new_operands->short_at_addr(fillp), |
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1063 (len = old_len - old_off) * sizeof(u2)); |
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1064 fillp += len; |
|
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1065 // second part of src |
|
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1066 Copy::conjoint_memory_atomic(to_cp->operands()->short_at_addr(from_off), |
|
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1067 new_operands->short_at_addr(fillp), |
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1068 (len = from_len - from_off) * sizeof(u2)); |
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1069 fillp += len; |
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1070 assert(fillp == new_operands->length(), ""); |
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1071 |
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1072 // Adjust indexes in the first part of the copied operands array. |
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1073 for (int j = 0; j < from_oplen; j++) { |
|
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1074 int offset = operand_offset_at(new_operands(), old_oplen + j); |
|
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1075 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy"); |
|
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1076 offset += old_len; // every new tuple is preceded by old_len extra u2's |
|
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1077 operand_offset_at_put(new_operands(), old_oplen + j, offset); |
|
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1078 } |
|
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|
1079 |
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|
1080 // replace target operands array with combined array |
|
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1081 to_cp->set_operands(new_operands()); |
|
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1082 } |
|
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1083 } |
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1084 |
| 0 | 1085 } // end copy_cp_to() |
| 1086 | |
| 1087 | |
| 1088 // Copy this constant pool's entry at from_i to the constant pool | |
| 1089 // to_cp's entry at to_i. | |
|
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1090 void constantPoolOopDesc::copy_entry_to(constantPoolHandle from_cp, int from_i, |
|
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1091 constantPoolHandle to_cp, int to_i, |
|
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1092 TRAPS) { |
| 0 | 1093 |
|
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1094 int tag = from_cp->tag_at(from_i).value(); |
|
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1095 switch (tag) { |
| 0 | 1096 case JVM_CONSTANT_Class: |
| 1097 { | |
|
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|
1098 klassOop k = from_cp->klass_at(from_i, CHECK); |
| 0 | 1099 to_cp->klass_at_put(to_i, k); |
| 1100 } break; | |
| 1101 | |
| 1102 case JVM_CONSTANT_ClassIndex: | |
| 1103 { | |
|
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1104 jint ki = from_cp->klass_index_at(from_i); |
| 0 | 1105 to_cp->klass_index_at_put(to_i, ki); |
| 1106 } break; | |
| 1107 | |
| 1108 case JVM_CONSTANT_Double: | |
| 1109 { | |
|
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1110 jdouble d = from_cp->double_at(from_i); |
| 0 | 1111 to_cp->double_at_put(to_i, d); |
| 1112 // double takes two constant pool entries so init second entry's tag | |
| 1113 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 1114 } break; | |
| 1115 | |
| 1116 case JVM_CONSTANT_Fieldref: | |
| 1117 { | |
|
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|
1118 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
|
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|
1119 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
| 0 | 1120 to_cp->field_at_put(to_i, class_index, name_and_type_index); |
| 1121 } break; | |
| 1122 | |
| 1123 case JVM_CONSTANT_Float: | |
| 1124 { | |
|
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|
1125 jfloat f = from_cp->float_at(from_i); |
| 0 | 1126 to_cp->float_at_put(to_i, f); |
| 1127 } break; | |
| 1128 | |
| 1129 case JVM_CONSTANT_Integer: | |
| 1130 { | |
|
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|
1131 jint i = from_cp->int_at(from_i); |
| 0 | 1132 to_cp->int_at_put(to_i, i); |
| 1133 } break; | |
| 1134 | |
| 1135 case JVM_CONSTANT_InterfaceMethodref: | |
| 1136 { | |
|
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|
1137 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
|
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|
1138 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
| 0 | 1139 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); |
| 1140 } break; | |
| 1141 | |
| 1142 case JVM_CONSTANT_Long: | |
| 1143 { | |
|
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|
1144 jlong l = from_cp->long_at(from_i); |
| 0 | 1145 to_cp->long_at_put(to_i, l); |
| 1146 // long takes two constant pool entries so init second entry's tag | |
| 1147 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 1148 } break; | |
| 1149 | |
| 1150 case JVM_CONSTANT_Methodref: | |
| 1151 { | |
|
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|
1152 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
|
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|
1153 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
| 0 | 1154 to_cp->method_at_put(to_i, class_index, name_and_type_index); |
| 1155 } break; | |
| 1156 | |
| 1157 case JVM_CONSTANT_NameAndType: | |
| 1158 { | |
|
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|
1159 int name_ref_index = from_cp->name_ref_index_at(from_i); |
|
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|
1160 int signature_ref_index = from_cp->signature_ref_index_at(from_i); |
| 0 | 1161 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); |
| 1162 } break; | |
| 1163 | |
| 1164 case JVM_CONSTANT_String: | |
| 1165 { | |
|
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diff
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|
1166 oop s = from_cp->string_at(from_i, CHECK); |
| 0 | 1167 to_cp->string_at_put(to_i, s); |
| 1168 } break; | |
| 1169 | |
| 1170 case JVM_CONSTANT_StringIndex: | |
| 1171 { | |
|
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|
1172 jint si = from_cp->string_index_at(from_i); |
| 0 | 1173 to_cp->string_index_at_put(to_i, si); |
| 1174 } break; | |
| 1175 | |
| 1176 case JVM_CONSTANT_UnresolvedClass: | |
| 1177 { | |
|
2177
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|
1178 Symbol* k = from_cp->unresolved_klass_at(from_i); |
| 0 | 1179 to_cp->unresolved_klass_at_put(to_i, k); |
| 1180 } break; | |
| 1181 | |
| 1182 case JVM_CONSTANT_UnresolvedClassInError: | |
| 1183 { | |
|
2177
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|
1184 Symbol* k = from_cp->unresolved_klass_at(from_i); |
| 0 | 1185 to_cp->unresolved_klass_at_put(to_i, k); |
| 1186 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
| 1187 } break; | |
| 1188 | |
| 1189 | |
| 1190 case JVM_CONSTANT_UnresolvedString: | |
| 1191 { | |
|
2177
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|
1192 Symbol* s = from_cp->unresolved_string_at(from_i); |
| 0 | 1193 to_cp->unresolved_string_at_put(to_i, s); |
| 1194 } break; | |
| 1195 | |
| 1196 case JVM_CONSTANT_Utf8: | |
| 1197 { | |
|
2177
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|
1198 Symbol* s = from_cp->symbol_at(from_i); |
| 0 | 1199 to_cp->symbol_at_put(to_i, s); |
|
2177
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|
1200 // This constantPool has the same lifetime as the original, so don't |
|
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|
1201 // increase reference counts for the copy. |
| 0 | 1202 } break; |
| 1203 | |
| 1602 | 1204 case JVM_CONSTANT_MethodType: |
| 1205 { | |
|
2011
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|
1206 jint k = from_cp->method_type_index_at(from_i); |
| 1602 | 1207 to_cp->method_type_index_at_put(to_i, k); |
| 1208 } break; | |
| 1209 | |
| 1210 case JVM_CONSTANT_MethodHandle: | |
| 1211 { | |
|
2011
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diff
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|
1212 int k1 = from_cp->method_handle_ref_kind_at(from_i); |
|
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diff
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|
1213 int k2 = from_cp->method_handle_index_at(from_i); |
| 1602 | 1214 to_cp->method_handle_index_at_put(to_i, k1, k2); |
| 1215 } break; | |
| 1216 | |
|
2011
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|
1217 case JVM_CONSTANT_InvokeDynamicTrans: |
|
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diff
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|
1218 { |
|
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|
1219 int k1 = from_cp->invoke_dynamic_bootstrap_method_ref_index_at(from_i); |
|
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|
1220 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i); |
|
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|
1221 to_cp->invoke_dynamic_trans_at_put(to_i, k1, k2); |
|
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diff
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|
1222 } break; |
|
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diff
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|
1223 |
|
1660
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1602
diff
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|
1224 case JVM_CONSTANT_InvokeDynamic: |
|
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1602
diff
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|
1225 { |
|
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|
1226 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i); |
|
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diff
changeset
|
1227 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i); |
|
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|
1228 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands |
|
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|
1229 to_cp->invoke_dynamic_at_put(to_i, k1, k2); |
|
1660
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diff
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|
1230 } break; |
|
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|
1231 |
| 0 | 1232 // Invalid is used as the tag for the second constant pool entry |
| 1233 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 1234 // not be seen by itself. | |
| 1235 case JVM_CONSTANT_Invalid: // fall through | |
| 1236 | |
| 1237 default: | |
| 1238 { | |
| 1239 ShouldNotReachHere(); | |
| 1240 } break; | |
| 1241 } | |
| 1242 } // end copy_entry_to() | |
| 1243 | |
| 1244 | |
| 1245 // Search constant pool search_cp for an entry that matches this | |
| 1246 // constant pool's entry at pattern_i. Returns the index of a | |
| 1247 // matching entry or zero (0) if there is no matching entry. | |
| 1248 int constantPoolOopDesc::find_matching_entry(int pattern_i, | |
| 1249 constantPoolHandle search_cp, TRAPS) { | |
| 1250 | |
| 1251 // index zero (0) is not used | |
| 1252 for (int i = 1; i < search_cp->length(); i++) { | |
| 1253 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
| 1254 if (found) { | |
| 1255 return i; | |
| 1256 } | |
| 1257 } | |
| 1258 | |
| 1259 return 0; // entry not found; return unused index zero (0) | |
| 1260 } // end find_matching_entry() | |
| 1261 | |
| 1262 | |
| 1263 #ifndef PRODUCT | |
| 1264 | |
| 1265 const char* constantPoolOopDesc::printable_name_at(int which) { | |
| 1266 | |
| 1267 constantTag tag = tag_at(which); | |
| 1268 | |
| 1269 if (tag.is_unresolved_string() || tag.is_string()) { | |
| 1270 return string_at_noresolve(which); | |
| 1271 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
| 1272 return klass_name_at(which)->as_C_string(); | |
| 1273 } else if (tag.is_symbol()) { | |
| 1274 return symbol_at(which)->as_C_string(); | |
| 1275 } | |
| 1276 return ""; | |
| 1277 } | |
| 1278 | |
| 1279 #endif // PRODUCT | |
| 1280 | |
| 1281 | |
| 1282 // JVMTI GetConstantPool support | |
| 1283 | |
| 1284 // For temporary use until code is stable. | |
| 1285 #define DBG(code) | |
| 1286 | |
| 1287 static const char* WARN_MSG = "Must not be such entry!"; | |
| 1288 | |
| 1289 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
| 1290 jint size = 0; | |
| 1291 u2 idx1, idx2; | |
| 1292 | |
| 1293 for (jint idx = 1; idx < cnt; idx++) { | |
| 1294 jint ent_size = 0; | |
| 1295 u1 tag = *bytes++; | |
| 1296 size++; // count tag | |
| 1297 | |
| 1298 printf("const #%03d, tag: %02d ", idx, tag); | |
| 1299 switch(tag) { | |
| 1300 case JVM_CONSTANT_Invalid: { | |
| 1301 printf("Invalid"); | |
| 1302 break; | |
| 1303 } | |
| 1304 case JVM_CONSTANT_Unicode: { | |
| 1305 printf("Unicode %s", WARN_MSG); | |
| 1306 break; | |
| 1307 } | |
| 1308 case JVM_CONSTANT_Utf8: { | |
| 1309 u2 len = Bytes::get_Java_u2(bytes); | |
| 1310 char str[128]; | |
| 1311 if (len > 127) { | |
| 1312 len = 127; | |
| 1313 } | |
| 1314 strncpy(str, (char *) (bytes+2), len); | |
| 1315 str[len] = '\0'; | |
| 1316 printf("Utf8 \"%s\"", str); | |
| 1317 ent_size = 2 + len; | |
| 1318 break; | |
| 1319 } | |
| 1320 case JVM_CONSTANT_Integer: { | |
| 1321 u4 val = Bytes::get_Java_u4(bytes); | |
| 1322 printf("int %d", *(int *) &val); | |
| 1323 ent_size = 4; | |
| 1324 break; | |
| 1325 } | |
| 1326 case JVM_CONSTANT_Float: { | |
| 1327 u4 val = Bytes::get_Java_u4(bytes); | |
| 1328 printf("float %5.3ff", *(float *) &val); | |
| 1329 ent_size = 4; | |
| 1330 break; | |
| 1331 } | |
| 1332 case JVM_CONSTANT_Long: { | |
| 1333 u8 val = Bytes::get_Java_u8(bytes); | |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
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parents:
431
diff
changeset
|
1334 printf("long "INT64_FORMAT, *(jlong *) &val); |
| 0 | 1335 ent_size = 8; |
| 1336 idx++; // Long takes two cpool slots | |
| 1337 break; | |
| 1338 } | |
| 1339 case JVM_CONSTANT_Double: { | |
| 1340 u8 val = Bytes::get_Java_u8(bytes); | |
| 1341 printf("double %5.3fd", *(jdouble *)&val); | |
| 1342 ent_size = 8; | |
| 1343 idx++; // Double takes two cpool slots | |
| 1344 break; | |
| 1345 } | |
| 1346 case JVM_CONSTANT_Class: { | |
| 1347 idx1 = Bytes::get_Java_u2(bytes); | |
| 1348 printf("class #%03d", idx1); | |
| 1349 ent_size = 2; | |
| 1350 break; | |
| 1351 } | |
| 1352 case JVM_CONSTANT_String: { | |
| 1353 idx1 = Bytes::get_Java_u2(bytes); | |
| 1354 printf("String #%03d", idx1); | |
| 1355 ent_size = 2; | |
| 1356 break; | |
| 1357 } | |
| 1358 case JVM_CONSTANT_Fieldref: { | |
| 1359 idx1 = Bytes::get_Java_u2(bytes); | |
| 1360 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1361 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
| 1362 ent_size = 4; | |
| 1363 break; | |
| 1364 } | |
| 1365 case JVM_CONSTANT_Methodref: { | |
| 1366 idx1 = Bytes::get_Java_u2(bytes); | |
| 1367 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1368 printf("Method #%03d, #%03d", idx1, idx2); | |
| 1369 ent_size = 4; | |
| 1370 break; | |
| 1371 } | |
| 1372 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1373 idx1 = Bytes::get_Java_u2(bytes); | |
| 1374 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1375 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
| 1376 ent_size = 4; | |
| 1377 break; | |
| 1378 } | |
| 1379 case JVM_CONSTANT_NameAndType: { | |
| 1380 idx1 = Bytes::get_Java_u2(bytes); | |
| 1381 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1382 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
| 1383 ent_size = 4; | |
| 1384 break; | |
| 1385 } | |
| 1386 case JVM_CONSTANT_ClassIndex: { | |
| 1387 printf("ClassIndex %s", WARN_MSG); | |
| 1388 break; | |
| 1389 } | |
| 1390 case JVM_CONSTANT_UnresolvedClass: { | |
| 1391 printf("UnresolvedClass: %s", WARN_MSG); | |
| 1392 break; | |
| 1393 } | |
| 1394 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1395 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
| 1396 break; | |
| 1397 } | |
| 1398 case JVM_CONSTANT_StringIndex: { | |
| 1399 printf("StringIndex: %s", WARN_MSG); | |
| 1400 break; | |
| 1401 } | |
| 1402 case JVM_CONSTANT_UnresolvedString: { | |
| 1403 printf("UnresolvedString: %s", WARN_MSG); | |
| 1404 break; | |
| 1405 } | |
| 1406 } | |
| 1407 printf(";\n"); | |
| 1408 bytes += ent_size; | |
| 1409 size += ent_size; | |
| 1410 } | |
| 1411 printf("Cpool size: %d\n", size); | |
| 1412 fflush(0); | |
| 1413 return; | |
| 1414 } /* end print_cpool_bytes */ | |
| 1415 | |
| 1416 | |
| 1417 // Returns size of constant pool entry. | |
| 1418 jint constantPoolOopDesc::cpool_entry_size(jint idx) { | |
| 1419 switch(tag_at(idx).value()) { | |
| 1420 case JVM_CONSTANT_Invalid: | |
| 1421 case JVM_CONSTANT_Unicode: | |
| 1422 return 1; | |
| 1423 | |
| 1424 case JVM_CONSTANT_Utf8: | |
| 1425 return 3 + symbol_at(idx)->utf8_length(); | |
| 1426 | |
| 1427 case JVM_CONSTANT_Class: | |
| 1428 case JVM_CONSTANT_String: | |
| 1429 case JVM_CONSTANT_ClassIndex: | |
| 1430 case JVM_CONSTANT_UnresolvedClass: | |
| 1431 case JVM_CONSTANT_UnresolvedClassInError: | |
| 1432 case JVM_CONSTANT_StringIndex: | |
| 1433 case JVM_CONSTANT_UnresolvedString: | |
| 1602 | 1434 case JVM_CONSTANT_MethodType: |
| 0 | 1435 return 3; |
| 1436 | |
| 1602 | 1437 case JVM_CONSTANT_MethodHandle: |
| 1438 return 4; //tag, ref_kind, ref_index | |
| 1439 | |
| 0 | 1440 case JVM_CONSTANT_Integer: |
| 1441 case JVM_CONSTANT_Float: | |
| 1442 case JVM_CONSTANT_Fieldref: | |
| 1443 case JVM_CONSTANT_Methodref: | |
| 1444 case JVM_CONSTANT_InterfaceMethodref: | |
| 1445 case JVM_CONSTANT_NameAndType: | |
|
1913
3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
1910
diff
changeset
|
1446 return 5; |
|
3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
1910
diff
changeset
|
1447 |
|
1660
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1602
diff
changeset
|
1448 case JVM_CONSTANT_InvokeDynamic: |
|
2011
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1449 case JVM_CONSTANT_InvokeDynamicTrans: |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1450 // u1 tag, u2 bsm, u2 nt |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1451 return 5; |
| 0 | 1452 |
| 1453 case JVM_CONSTANT_Long: | |
| 1454 case JVM_CONSTANT_Double: | |
| 1455 return 9; | |
| 1456 } | |
| 1457 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
| 1458 return 1; | |
| 1459 } /* end cpool_entry_size */ | |
| 1460 | |
| 1461 | |
| 1462 // SymbolHashMap is used to find a constant pool index from a string. | |
| 1463 // This function fills in SymbolHashMaps, one for utf8s and one for | |
| 1464 // class names, returns size of the cpool raw bytes. | |
| 1465 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, | |
| 1466 SymbolHashMap *classmap) { | |
| 1467 jint size = 0; | |
| 1468 | |
| 1469 for (u2 idx = 1; idx < length(); idx++) { | |
| 1470 u2 tag = tag_at(idx).value(); | |
| 1471 size += cpool_entry_size(idx); | |
| 1472 | |
| 1473 switch(tag) { | |
| 1474 case JVM_CONSTANT_Utf8: { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1475 Symbol* sym = symbol_at(idx); |
| 0 | 1476 symmap->add_entry(sym, idx); |
| 1477 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1478 break; | |
| 1479 } | |
| 1480 case JVM_CONSTANT_Class: | |
| 1481 case JVM_CONSTANT_UnresolvedClass: | |
| 1482 case JVM_CONSTANT_UnresolvedClassInError: { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1483 Symbol* sym = klass_name_at(idx); |
| 0 | 1484 classmap->add_entry(sym, idx); |
| 1485 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1486 break; | |
| 1487 } | |
| 1488 case JVM_CONSTANT_Long: | |
| 1489 case JVM_CONSTANT_Double: { | |
| 1490 idx++; // Both Long and Double take two cpool slots | |
| 1491 break; | |
| 1492 } | |
| 1493 } | |
| 1494 } | |
| 1495 return size; | |
| 1496 } /* end hash_utf8_entries_to */ | |
| 1497 | |
| 1498 | |
| 1499 // Copy cpool bytes. | |
| 1500 // Returns: | |
| 1501 // 0, in case of OutOfMemoryError | |
| 1502 // -1, in case of internal error | |
| 1503 // > 0, count of the raw cpool bytes that have been copied | |
| 1504 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, | |
| 1505 SymbolHashMap* tbl, | |
| 1506 unsigned char *bytes) { | |
| 1507 u2 idx1, idx2; | |
| 1508 jint size = 0; | |
| 1509 jint cnt = length(); | |
| 1510 unsigned char *start_bytes = bytes; | |
| 1511 | |
| 1512 for (jint idx = 1; idx < cnt; idx++) { | |
| 1513 u1 tag = tag_at(idx).value(); | |
| 1514 jint ent_size = cpool_entry_size(idx); | |
| 1515 | |
| 1516 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
| 1517 | |
| 1518 *bytes = tag; | |
| 1519 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
| 1520 switch(tag) { | |
| 1521 case JVM_CONSTANT_Invalid: { | |
| 1522 DBG(printf("JVM_CONSTANT_Invalid")); | |
| 1523 break; | |
| 1524 } | |
| 1525 case JVM_CONSTANT_Unicode: { | |
| 1526 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
| 1527 DBG(printf("JVM_CONSTANT_Unicode")); | |
| 1528 break; | |
| 1529 } | |
| 1530 case JVM_CONSTANT_Utf8: { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1531 Symbol* sym = symbol_at(idx); |
| 0 | 1532 char* str = sym->as_utf8(); |
| 1533 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
| 1534 int len = (int) strlen(str); | |
| 1535 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
| 1536 for (int i = 0; i < len; i++) { | |
| 1537 bytes[3+i] = (u1) str[i]; | |
| 1538 } | |
| 1539 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
| 1540 break; | |
| 1541 } | |
| 1542 case JVM_CONSTANT_Integer: { | |
| 1543 jint val = int_at(idx); | |
| 1544 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1545 break; | |
| 1546 } | |
| 1547 case JVM_CONSTANT_Float: { | |
| 1548 jfloat val = float_at(idx); | |
| 1549 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1550 break; | |
| 1551 } | |
| 1552 case JVM_CONSTANT_Long: { | |
| 1553 jlong val = long_at(idx); | |
| 1554 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1555 idx++; // Long takes two cpool slots | |
| 1556 break; | |
| 1557 } | |
| 1558 case JVM_CONSTANT_Double: { | |
| 1559 jdouble val = double_at(idx); | |
| 1560 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1561 idx++; // Double takes two cpool slots | |
| 1562 break; | |
| 1563 } | |
| 1564 case JVM_CONSTANT_Class: | |
| 1565 case JVM_CONSTANT_UnresolvedClass: | |
| 1566 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1567 *bytes = JVM_CONSTANT_Class; | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1568 Symbol* sym = klass_name_at(idx); |
| 0 | 1569 idx1 = tbl->symbol_to_value(sym); |
| 1570 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1571 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1572 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
| 1573 break; | |
| 1574 } | |
| 1575 case JVM_CONSTANT_String: { | |
| 1576 unsigned int hash; | |
| 1577 char *str = string_at_noresolve(idx); | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1578 TempNewSymbol sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); |
|
773
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1579 if (sym == NULL) { |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1580 // sym can be NULL if string refers to incorrectly encoded JVM_CONSTANT_Utf8 |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1581 // this can happen with JVM TI; see CR 6839599 for more details |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1582 oop string = *(obj_at_addr_raw(idx)); |
|
773
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1583 assert(java_lang_String::is_instance(string),"Not a String"); |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1584 DBG(printf("Error #%03hd tag=%03hd\n", idx, tag)); |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1585 idx1 = 0; |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1586 for (int j = 0; j < tbl->table_size() && idx1 == 0; j++) { |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1587 for (SymbolHashMapEntry* cur = tbl->bucket(j); cur != NULL; cur = cur->next()) { |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1588 int length; |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1589 Symbol* s = cur->symbol(); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1590 jchar* chars = s->as_unicode(length); |
|
773
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1591 if (java_lang_String::equals(string, chars, length)) { |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1592 idx1 = cur->value(); |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1593 DBG(printf("Index found: %d\n",idx1)); |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1594 break; |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1595 } |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1596 } |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1597 } |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1598 } else { |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1599 idx1 = tbl->symbol_to_value(sym); |
|
47ffceb239d0
6839599: JVM crash while profiling Tomcat and Liferay
thurka
parents:
726
diff
changeset
|
1600 } |
| 0 | 1601 assert(idx1 != 0, "Have not found a hashtable entry"); |
| 1602 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1603 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); | |
| 1604 break; | |
| 1605 } | |
| 1606 case JVM_CONSTANT_UnresolvedString: { | |
| 1607 *bytes = JVM_CONSTANT_String; | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1608 Symbol* sym = unresolved_string_at(idx); |
| 0 | 1609 idx1 = tbl->symbol_to_value(sym); |
| 1610 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1611 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1612 DBG(char *str = sym->as_utf8()); | |
| 1613 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); | |
| 1614 break; | |
| 1615 } | |
| 1616 case JVM_CONSTANT_Fieldref: | |
| 1617 case JVM_CONSTANT_Methodref: | |
| 1618 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1619 idx1 = uncached_klass_ref_index_at(idx); | |
| 1620 idx2 = uncached_name_and_type_ref_index_at(idx); | |
| 1621 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1622 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1623 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
| 1624 break; | |
| 1625 } | |
| 1626 case JVM_CONSTANT_NameAndType: { | |
| 1627 idx1 = name_ref_index_at(idx); | |
| 1628 idx2 = signature_ref_index_at(idx); | |
| 1629 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1630 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1631 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
| 1632 break; | |
| 1633 } | |
| 1634 case JVM_CONSTANT_ClassIndex: { | |
| 1635 *bytes = JVM_CONSTANT_Class; | |
| 1636 idx1 = klass_index_at(idx); | |
| 1637 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1638 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
| 1639 break; | |
| 1640 } | |
| 1641 case JVM_CONSTANT_StringIndex: { | |
| 1642 *bytes = JVM_CONSTANT_String; | |
| 1643 idx1 = string_index_at(idx); | |
| 1644 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1645 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
| 1646 break; | |
| 1647 } | |
| 1602 | 1648 case JVM_CONSTANT_MethodHandle: { |
| 1649 *bytes = JVM_CONSTANT_MethodHandle; | |
| 1650 int kind = method_handle_ref_kind_at(idx); | |
| 1651 idx1 = method_handle_index_at(idx); | |
| 1652 *(bytes+1) = (unsigned char) kind; | |
| 1653 Bytes::put_Java_u2((address) (bytes+2), idx1); | |
| 1654 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1)); | |
| 1655 break; | |
| 1656 } | |
| 1657 case JVM_CONSTANT_MethodType: { | |
| 1658 *bytes = JVM_CONSTANT_MethodType; | |
| 1659 idx1 = method_type_index_at(idx); | |
| 1660 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1661 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1)); | |
| 1662 break; | |
| 1663 } | |
|
2011
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1664 case JVM_CONSTANT_InvokeDynamicTrans: |
|
1660
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1602
diff
changeset
|
1665 case JVM_CONSTANT_InvokeDynamic: { |
|
2011
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1666 *bytes = tag; |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1667 idx1 = extract_low_short_from_int(*int_at_addr(idx)); |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1668 idx2 = extract_high_short_from_int(*int_at_addr(idx)); |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1669 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4"); |
|
1660
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1602
diff
changeset
|
1670 Bytes::put_Java_u2((address) (bytes+1), idx1); |
|
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1602
diff
changeset
|
1671 Bytes::put_Java_u2((address) (bytes+3), idx2); |
|
2011
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
1672 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2)); |
|
1660
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1602
diff
changeset
|
1673 break; |
|
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1602
diff
changeset
|
1674 } |
| 0 | 1675 } |
| 1676 DBG(printf("\n")); | |
| 1677 bytes += ent_size; | |
| 1678 size += ent_size; | |
| 1679 } | |
| 1680 assert(size == cpool_size, "Size mismatch"); | |
| 1681 | |
| 1682 // Keep temorarily for debugging until it's stable. | |
| 1683 DBG(print_cpool_bytes(cnt, start_bytes)); | |
| 1684 return (int)(bytes - start_bytes); | |
| 1685 } /* end copy_cpool_bytes */ | |
| 1686 | |
| 1687 | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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parents:
2011
diff
changeset
|
1688 void SymbolHashMap::add_entry(Symbol* sym, u2 value) { |
| 0 | 1689 char *str = sym->as_utf8(); |
| 1690 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
| 1691 unsigned int index = hash % table_size(); | |
| 1692 | |
| 1693 // check if already in map | |
| 1694 // we prefer the first entry since it is more likely to be what was used in | |
| 1695 // the class file | |
| 1696 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1697 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1698 if (en->hash() == hash && en->symbol() == sym) { | |
| 1699 return; // already there | |
| 1700 } | |
| 1701 } | |
| 1702 | |
| 1703 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
| 1704 entry->set_next(bucket(index)); | |
| 1705 _buckets[index].set_entry(entry); | |
| 1706 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1707 } | |
| 1708 | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2011
diff
changeset
|
1709 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) { |
| 0 | 1710 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); |
| 1711 char *str = sym->as_utf8(); | |
| 1712 int len = sym->utf8_length(); | |
| 1713 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
| 1714 unsigned int index = hash % table_size(); | |
| 1715 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1716 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1717 if (en->hash() == hash && en->symbol() == sym) { | |
| 1718 return en; | |
| 1719 } | |
| 1720 } | |
| 1721 return NULL; | |
| 1722 } |