Mon, 09 Jun 2008 11:51:19 -0400
6687581: Make CMS work with compressed oops
Summary: Make FreeChunk read markword instead of LSB in _klass pointer to indicate that it's a FreeChunk for compressed oops.
Reviewed-by: ysr, jmasa
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | # include "incls/_precompiled.incl" |
duke@435 | 26 | # include "incls/_constantPoolOop.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | klassOop constantPoolOopDesc::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
duke@435 | 29 | // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. |
duke@435 | 30 | // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
duke@435 | 31 | // tag is not updated atomicly. |
duke@435 | 32 | oop entry = *(this_oop->obj_at_addr(which)); |
duke@435 | 33 | if (entry->is_klass()) { |
duke@435 | 34 | // Already resolved - return entry. |
duke@435 | 35 | return (klassOop)entry; |
duke@435 | 36 | } |
duke@435 | 37 | |
duke@435 | 38 | // Acquire lock on constant oop while doing update. After we get the lock, we check if another object |
duke@435 | 39 | // already has updated the object |
duke@435 | 40 | assert(THREAD->is_Java_thread(), "must be a Java thread"); |
duke@435 | 41 | bool do_resolve = false; |
duke@435 | 42 | bool in_error = false; |
duke@435 | 43 | |
duke@435 | 44 | symbolHandle name; |
duke@435 | 45 | Handle loader; |
duke@435 | 46 | { ObjectLocker ol(this_oop, THREAD); |
duke@435 | 47 | |
duke@435 | 48 | if (this_oop->tag_at(which).is_unresolved_klass()) { |
duke@435 | 49 | if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { |
duke@435 | 50 | in_error = true; |
duke@435 | 51 | } else { |
duke@435 | 52 | do_resolve = true; |
duke@435 | 53 | name = symbolHandle(THREAD, this_oop->unresolved_klass_at(which)); |
duke@435 | 54 | loader = Handle(THREAD, instanceKlass::cast(this_oop->pool_holder())->class_loader()); |
duke@435 | 55 | } |
duke@435 | 56 | } |
duke@435 | 57 | } // unlocking constantPool |
duke@435 | 58 | |
duke@435 | 59 | |
duke@435 | 60 | // The original attempt to resolve this constant pool entry failed so find the |
duke@435 | 61 | // original error and throw it again (JVMS 5.4.3). |
duke@435 | 62 | if (in_error) { |
duke@435 | 63 | symbolOop error = SystemDictionary::find_resolution_error(this_oop, which); |
duke@435 | 64 | guarantee(error != (symbolOop)NULL, "tag mismatch with resolution error table"); |
duke@435 | 65 | ResourceMark rm; |
duke@435 | 66 | // exception text will be the class name |
duke@435 | 67 | const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); |
duke@435 | 68 | THROW_MSG_0(error, className); |
duke@435 | 69 | } |
duke@435 | 70 | |
duke@435 | 71 | if (do_resolve) { |
duke@435 | 72 | // this_oop must be unlocked during resolve_or_fail |
duke@435 | 73 | oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); |
duke@435 | 74 | Handle h_prot (THREAD, protection_domain); |
duke@435 | 75 | klassOop k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); |
duke@435 | 76 | KlassHandle k; |
duke@435 | 77 | if (!HAS_PENDING_EXCEPTION) { |
duke@435 | 78 | k = KlassHandle(THREAD, k_oop); |
duke@435 | 79 | // Do access check for klasses |
duke@435 | 80 | verify_constant_pool_resolve(this_oop, k, THREAD); |
duke@435 | 81 | } |
duke@435 | 82 | |
duke@435 | 83 | // Failed to resolve class. We must record the errors so that subsequent attempts |
duke@435 | 84 | // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). |
duke@435 | 85 | if (HAS_PENDING_EXCEPTION) { |
duke@435 | 86 | ResourceMark rm; |
duke@435 | 87 | symbolHandle error(PENDING_EXCEPTION->klass()->klass_part()->name()); |
duke@435 | 88 | |
duke@435 | 89 | bool throw_orig_error = false; |
duke@435 | 90 | { |
duke@435 | 91 | ObjectLocker ol (this_oop, THREAD); |
duke@435 | 92 | |
duke@435 | 93 | // some other thread has beaten us and has resolved the class. |
duke@435 | 94 | if (this_oop->tag_at(which).is_klass()) { |
duke@435 | 95 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 96 | entry = this_oop->resolved_klass_at(which); |
duke@435 | 97 | return (klassOop)entry; |
duke@435 | 98 | } |
duke@435 | 99 | |
duke@435 | 100 | if (!PENDING_EXCEPTION-> |
duke@435 | 101 | is_a(SystemDictionary::linkageError_klass())) { |
duke@435 | 102 | // Just throw the exception and don't prevent these classes from |
duke@435 | 103 | // being loaded due to virtual machine errors like StackOverflow |
duke@435 | 104 | // and OutOfMemoryError, etc, or if the thread was hit by stop() |
duke@435 | 105 | // Needs clarification to section 5.4.3 of the VM spec (see 6308271) |
duke@435 | 106 | } |
duke@435 | 107 | else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { |
duke@435 | 108 | SystemDictionary::add_resolution_error(this_oop, which, error); |
duke@435 | 109 | this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); |
duke@435 | 110 | } else { |
duke@435 | 111 | // some other thread has put the class in error state. |
duke@435 | 112 | error = symbolHandle(SystemDictionary::find_resolution_error(this_oop, which)); |
duke@435 | 113 | assert(!error.is_null(), "checking"); |
duke@435 | 114 | throw_orig_error = true; |
duke@435 | 115 | } |
duke@435 | 116 | } // unlocked |
duke@435 | 117 | |
duke@435 | 118 | if (throw_orig_error) { |
duke@435 | 119 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 120 | ResourceMark rm; |
duke@435 | 121 | const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); |
duke@435 | 122 | THROW_MSG_0(error, className); |
duke@435 | 123 | } |
duke@435 | 124 | |
duke@435 | 125 | return 0; |
duke@435 | 126 | } |
duke@435 | 127 | |
duke@435 | 128 | if (TraceClassResolution && !k()->klass_part()->oop_is_array()) { |
duke@435 | 129 | // skip resolving the constant pool so that this code get's |
duke@435 | 130 | // called the next time some bytecodes refer to this class. |
duke@435 | 131 | ResourceMark rm; |
duke@435 | 132 | int line_number = -1; |
duke@435 | 133 | const char * source_file = NULL; |
duke@435 | 134 | if (JavaThread::current()->has_last_Java_frame()) { |
duke@435 | 135 | // try to identify the method which called this function. |
duke@435 | 136 | vframeStream vfst(JavaThread::current()); |
duke@435 | 137 | if (!vfst.at_end()) { |
duke@435 | 138 | line_number = vfst.method()->line_number_from_bci(vfst.bci()); |
duke@435 | 139 | symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); |
duke@435 | 140 | if (s != NULL) { |
duke@435 | 141 | source_file = s->as_C_string(); |
duke@435 | 142 | } |
duke@435 | 143 | } |
duke@435 | 144 | } |
duke@435 | 145 | if (k() != this_oop->pool_holder()) { |
duke@435 | 146 | // only print something if the classes are different |
duke@435 | 147 | if (source_file != NULL) { |
duke@435 | 148 | tty->print("RESOLVE %s %s %s:%d\n", |
duke@435 | 149 | instanceKlass::cast(this_oop->pool_holder())->external_name(), |
duke@435 | 150 | instanceKlass::cast(k())->external_name(), source_file, line_number); |
duke@435 | 151 | } else { |
duke@435 | 152 | tty->print("RESOLVE %s %s\n", |
duke@435 | 153 | instanceKlass::cast(this_oop->pool_holder())->external_name(), |
duke@435 | 154 | instanceKlass::cast(k())->external_name()); |
duke@435 | 155 | } |
duke@435 | 156 | } |
duke@435 | 157 | return k(); |
duke@435 | 158 | } else { |
duke@435 | 159 | ObjectLocker ol (this_oop, THREAD); |
duke@435 | 160 | // Only updated constant pool - if it is resolved. |
duke@435 | 161 | do_resolve = this_oop->tag_at(which).is_unresolved_klass(); |
duke@435 | 162 | if (do_resolve) { |
duke@435 | 163 | this_oop->klass_at_put(which, k()); |
duke@435 | 164 | } |
duke@435 | 165 | } |
duke@435 | 166 | } |
duke@435 | 167 | |
duke@435 | 168 | entry = this_oop->resolved_klass_at(which); |
duke@435 | 169 | assert(entry->is_klass(), "must be resolved at this point"); |
duke@435 | 170 | return (klassOop)entry; |
duke@435 | 171 | } |
duke@435 | 172 | |
duke@435 | 173 | |
duke@435 | 174 | // Does not update constantPoolOop - to avoid any exception throwing. Used |
duke@435 | 175 | // by compiler and exception handling. Also used to avoid classloads for |
duke@435 | 176 | // instanceof operations. Returns NULL if the class has not been loaded or |
duke@435 | 177 | // if the verification of constant pool failed |
duke@435 | 178 | klassOop constantPoolOopDesc::klass_at_if_loaded(constantPoolHandle this_oop, int which) { |
duke@435 | 179 | oop entry = *this_oop->obj_at_addr(which); |
duke@435 | 180 | if (entry->is_klass()) { |
duke@435 | 181 | return (klassOop)entry; |
duke@435 | 182 | } else { |
duke@435 | 183 | assert(entry->is_symbol(), "must be either symbol or klass"); |
duke@435 | 184 | Thread *thread = Thread::current(); |
duke@435 | 185 | symbolHandle name (thread, (symbolOop)entry); |
duke@435 | 186 | oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); |
duke@435 | 187 | oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); |
duke@435 | 188 | Handle h_prot (thread, protection_domain); |
duke@435 | 189 | Handle h_loader (thread, loader); |
duke@435 | 190 | klassOop k = SystemDictionary::find(name, h_loader, h_prot, thread); |
duke@435 | 191 | |
duke@435 | 192 | if (k != NULL) { |
duke@435 | 193 | // Make sure that resolving is legal |
duke@435 | 194 | EXCEPTION_MARK; |
duke@435 | 195 | KlassHandle klass(THREAD, k); |
duke@435 | 196 | // return NULL if verification fails |
duke@435 | 197 | verify_constant_pool_resolve(this_oop, klass, THREAD); |
duke@435 | 198 | if (HAS_PENDING_EXCEPTION) { |
duke@435 | 199 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 200 | return NULL; |
duke@435 | 201 | } |
duke@435 | 202 | return klass(); |
duke@435 | 203 | } else { |
duke@435 | 204 | return k; |
duke@435 | 205 | } |
duke@435 | 206 | } |
duke@435 | 207 | } |
duke@435 | 208 | |
duke@435 | 209 | |
duke@435 | 210 | klassOop constantPoolOopDesc::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { |
duke@435 | 211 | return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); |
duke@435 | 212 | } |
duke@435 | 213 | |
duke@435 | 214 | |
duke@435 | 215 | // This is an interface for the compiler that allows accessing non-resolved entries |
duke@435 | 216 | // in the constant pool - but still performs the validations tests. Must be used |
duke@435 | 217 | // in a pre-parse of the compiler - to determine what it can do and not do. |
duke@435 | 218 | // Note: We cannot update the ConstantPool from the vm_thread. |
duke@435 | 219 | klassOop constantPoolOopDesc::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { |
duke@435 | 220 | int which = this_oop->klass_ref_index_at(index); |
duke@435 | 221 | oop entry = *this_oop->obj_at_addr(which); |
duke@435 | 222 | if (entry->is_klass()) { |
duke@435 | 223 | return (klassOop)entry; |
duke@435 | 224 | } else { |
duke@435 | 225 | assert(entry->is_symbol(), "must be either symbol or klass"); |
duke@435 | 226 | symbolHandle name (THREAD, (symbolOop)entry); |
duke@435 | 227 | oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); |
duke@435 | 228 | oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); |
duke@435 | 229 | Handle h_loader(THREAD, loader); |
duke@435 | 230 | Handle h_prot (THREAD, protection_domain); |
duke@435 | 231 | KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); |
duke@435 | 232 | |
duke@435 | 233 | // Do access check for klasses |
duke@435 | 234 | if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); |
duke@435 | 235 | return k(); |
duke@435 | 236 | } |
duke@435 | 237 | } |
duke@435 | 238 | |
duke@435 | 239 | |
duke@435 | 240 | symbolOop constantPoolOopDesc::uncached_name_ref_at(int which) { |
duke@435 | 241 | jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); |
duke@435 | 242 | int name_index = extract_low_short_from_int(ref_index); |
duke@435 | 243 | return symbol_at(name_index); |
duke@435 | 244 | } |
duke@435 | 245 | |
duke@435 | 246 | |
duke@435 | 247 | symbolOop constantPoolOopDesc::uncached_signature_ref_at(int which) { |
duke@435 | 248 | jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); |
duke@435 | 249 | int signature_index = extract_high_short_from_int(ref_index); |
duke@435 | 250 | return symbol_at(signature_index); |
duke@435 | 251 | } |
duke@435 | 252 | |
duke@435 | 253 | |
duke@435 | 254 | int constantPoolOopDesc::uncached_name_and_type_ref_index_at(int which) { |
duke@435 | 255 | jint ref_index = field_or_method_at(which, true); |
duke@435 | 256 | return extract_high_short_from_int(ref_index); |
duke@435 | 257 | } |
duke@435 | 258 | |
duke@435 | 259 | |
duke@435 | 260 | int constantPoolOopDesc::uncached_klass_ref_index_at(int which) { |
duke@435 | 261 | jint ref_index = field_or_method_at(which, true); |
duke@435 | 262 | return extract_low_short_from_int(ref_index); |
duke@435 | 263 | } |
duke@435 | 264 | |
duke@435 | 265 | |
duke@435 | 266 | void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
duke@435 | 267 | if (k->oop_is_instance() || k->oop_is_objArray()) { |
duke@435 | 268 | instanceKlassHandle holder (THREAD, this_oop->pool_holder()); |
duke@435 | 269 | klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); |
duke@435 | 270 | KlassHandle element (THREAD, elem_oop); |
duke@435 | 271 | |
duke@435 | 272 | // The element type could be a typeArray - we only need the access check if it is |
duke@435 | 273 | // an reference to another class |
duke@435 | 274 | if (element->oop_is_instance()) { |
duke@435 | 275 | LinkResolver::check_klass_accessability(holder, element, CHECK); |
duke@435 | 276 | } |
duke@435 | 277 | } |
duke@435 | 278 | } |
duke@435 | 279 | |
duke@435 | 280 | |
duke@435 | 281 | int constantPoolOopDesc::klass_ref_index_at(int which) { |
duke@435 | 282 | jint ref_index = field_or_method_at(which, false); |
duke@435 | 283 | return extract_low_short_from_int(ref_index); |
duke@435 | 284 | } |
duke@435 | 285 | |
duke@435 | 286 | |
duke@435 | 287 | int constantPoolOopDesc::name_and_type_ref_index_at(int which) { |
duke@435 | 288 | jint ref_index = field_or_method_at(which, false); |
duke@435 | 289 | return extract_high_short_from_int(ref_index); |
duke@435 | 290 | } |
duke@435 | 291 | |
duke@435 | 292 | |
duke@435 | 293 | int constantPoolOopDesc::name_ref_index_at(int which) { |
duke@435 | 294 | jint ref_index = name_and_type_at(which); |
duke@435 | 295 | return extract_low_short_from_int(ref_index); |
duke@435 | 296 | } |
duke@435 | 297 | |
duke@435 | 298 | |
duke@435 | 299 | int constantPoolOopDesc::signature_ref_index_at(int which) { |
duke@435 | 300 | jint ref_index = name_and_type_at(which); |
duke@435 | 301 | return extract_high_short_from_int(ref_index); |
duke@435 | 302 | } |
duke@435 | 303 | |
duke@435 | 304 | |
duke@435 | 305 | klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { |
duke@435 | 306 | return klass_at(klass_ref_index_at(which), CHECK_NULL); |
duke@435 | 307 | } |
duke@435 | 308 | |
duke@435 | 309 | |
duke@435 | 310 | symbolOop constantPoolOopDesc::klass_name_at(int which) { |
duke@435 | 311 | assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), |
duke@435 | 312 | "Corrupted constant pool"); |
duke@435 | 313 | // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. |
duke@435 | 314 | // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
duke@435 | 315 | // tag is not updated atomicly. |
duke@435 | 316 | oop entry = *(obj_at_addr(which)); |
duke@435 | 317 | if (entry->is_klass()) { |
duke@435 | 318 | // Already resolved - return entry's name. |
duke@435 | 319 | return klassOop(entry)->klass_part()->name(); |
duke@435 | 320 | } else { |
duke@435 | 321 | assert(entry->is_symbol(), "must be either symbol or klass"); |
duke@435 | 322 | return (symbolOop)entry; |
duke@435 | 323 | } |
duke@435 | 324 | } |
duke@435 | 325 | |
duke@435 | 326 | symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) { |
duke@435 | 327 | jint ref_index = klass_ref_index_at(which); |
duke@435 | 328 | return klass_at_noresolve(ref_index); |
duke@435 | 329 | } |
duke@435 | 330 | |
duke@435 | 331 | char* constantPoolOopDesc::string_at_noresolve(int which) { |
duke@435 | 332 | // Test entry type in case string is resolved while in here. |
duke@435 | 333 | oop entry = *(obj_at_addr(which)); |
duke@435 | 334 | if (entry->is_symbol()) { |
duke@435 | 335 | return ((symbolOop)entry)->as_C_string(); |
duke@435 | 336 | } else { |
duke@435 | 337 | return java_lang_String::as_utf8_string(entry); |
duke@435 | 338 | } |
duke@435 | 339 | } |
duke@435 | 340 | |
duke@435 | 341 | |
duke@435 | 342 | symbolOop constantPoolOopDesc::name_ref_at(int which) { |
duke@435 | 343 | jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); |
duke@435 | 344 | int name_index = extract_low_short_from_int(ref_index); |
duke@435 | 345 | return symbol_at(name_index); |
duke@435 | 346 | } |
duke@435 | 347 | |
duke@435 | 348 | |
duke@435 | 349 | symbolOop constantPoolOopDesc::signature_ref_at(int which) { |
duke@435 | 350 | jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); |
duke@435 | 351 | int signature_index = extract_high_short_from_int(ref_index); |
duke@435 | 352 | return symbol_at(signature_index); |
duke@435 | 353 | } |
duke@435 | 354 | |
duke@435 | 355 | |
duke@435 | 356 | BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { |
duke@435 | 357 | return FieldType::basic_type(symbol_at(which)); |
duke@435 | 358 | } |
duke@435 | 359 | |
duke@435 | 360 | |
duke@435 | 361 | void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { |
duke@435 | 362 | for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused |
duke@435 | 363 | if (this_oop->tag_at(index).is_unresolved_string()) { |
duke@435 | 364 | this_oop->string_at(index, CHECK); |
duke@435 | 365 | } |
duke@435 | 366 | } |
duke@435 | 367 | } |
duke@435 | 368 | |
duke@435 | 369 | oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
duke@435 | 370 | oop entry = *(this_oop->obj_at_addr(which)); |
duke@435 | 371 | if (entry->is_symbol()) { |
duke@435 | 372 | ObjectLocker ol(this_oop, THREAD); |
duke@435 | 373 | if (this_oop->tag_at(which).is_unresolved_string()) { |
duke@435 | 374 | // Intern string |
duke@435 | 375 | symbolOop sym = this_oop->unresolved_string_at(which); |
duke@435 | 376 | entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); |
duke@435 | 377 | this_oop->string_at_put(which, entry); |
duke@435 | 378 | } else { |
duke@435 | 379 | // Another thread beat us and interned string, read string from constant pool |
duke@435 | 380 | entry = this_oop->resolved_string_at(which); |
duke@435 | 381 | } |
duke@435 | 382 | } |
duke@435 | 383 | assert(java_lang_String::is_instance(entry), "must be string"); |
duke@435 | 384 | return entry; |
duke@435 | 385 | } |
duke@435 | 386 | |
duke@435 | 387 | |
duke@435 | 388 | bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, |
duke@435 | 389 | int which) { |
duke@435 | 390 | // Names are interned, so we can compare symbolOops directly |
duke@435 | 391 | symbolOop cp_name = klass_name_at(which); |
duke@435 | 392 | return (cp_name == k->name()); |
duke@435 | 393 | } |
duke@435 | 394 | |
duke@435 | 395 | |
duke@435 | 396 | int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { |
duke@435 | 397 | ResourceMark rm; |
duke@435 | 398 | int count = 0; |
duke@435 | 399 | for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused |
duke@435 | 400 | if (tag_at(index).is_unresolved_string()) { |
duke@435 | 401 | // Intern string |
duke@435 | 402 | symbolOop sym = unresolved_string_at(index); |
duke@435 | 403 | oop entry = StringTable::intern(sym, CHECK_(-1)); |
duke@435 | 404 | string_at_put(index, entry); |
duke@435 | 405 | } |
duke@435 | 406 | } |
duke@435 | 407 | return count; |
duke@435 | 408 | } |
duke@435 | 409 | |
duke@435 | 410 | |
duke@435 | 411 | // Iterate over symbols which are used as class, field, method names and |
duke@435 | 412 | // signatures (in preparation for writing to the shared archive). |
duke@435 | 413 | |
duke@435 | 414 | void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) { |
duke@435 | 415 | for (int index = 1; index < length(); index++) { // Index 0 is unused |
duke@435 | 416 | switch (tag_at(index).value()) { |
duke@435 | 417 | |
duke@435 | 418 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 419 | closure->do_oop(obj_at_addr(index)); |
duke@435 | 420 | break; |
duke@435 | 421 | |
duke@435 | 422 | case JVM_CONSTANT_NameAndType: |
duke@435 | 423 | { |
duke@435 | 424 | int i = *int_at_addr(index); |
duke@435 | 425 | closure->do_oop(obj_at_addr((unsigned)i >> 16)); |
duke@435 | 426 | closure->do_oop(obj_at_addr((unsigned)i & 0xffff)); |
duke@435 | 427 | } |
duke@435 | 428 | break; |
duke@435 | 429 | |
duke@435 | 430 | case JVM_CONSTANT_Class: |
duke@435 | 431 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 432 | case JVM_CONSTANT_Fieldref: |
duke@435 | 433 | case JVM_CONSTANT_Methodref: |
duke@435 | 434 | case JVM_CONSTANT_Integer: |
duke@435 | 435 | case JVM_CONSTANT_Float: |
duke@435 | 436 | // Do nothing! Not an oop. |
duke@435 | 437 | // These constant types do not reference symbols at this point. |
duke@435 | 438 | break; |
duke@435 | 439 | |
duke@435 | 440 | case JVM_CONSTANT_String: |
duke@435 | 441 | // Do nothing! Not a symbol. |
duke@435 | 442 | break; |
duke@435 | 443 | |
duke@435 | 444 | case JVM_CONSTANT_UnresolvedString: |
duke@435 | 445 | case JVM_CONSTANT_Utf8: |
duke@435 | 446 | // These constants are symbols, but unless these symbols are |
duke@435 | 447 | // actually to be used for something, we don't want to mark them. |
duke@435 | 448 | break; |
duke@435 | 449 | |
duke@435 | 450 | case JVM_CONSTANT_Long: |
duke@435 | 451 | case JVM_CONSTANT_Double: |
duke@435 | 452 | // Do nothing! Not an oop. (But takes two pool entries.) |
duke@435 | 453 | ++index; |
duke@435 | 454 | break; |
duke@435 | 455 | |
duke@435 | 456 | default: |
duke@435 | 457 | ShouldNotReachHere(); |
duke@435 | 458 | break; |
duke@435 | 459 | } |
duke@435 | 460 | } |
duke@435 | 461 | } |
duke@435 | 462 | |
duke@435 | 463 | |
duke@435 | 464 | // Iterate over the [one] tags array (in preparation for writing to the |
duke@435 | 465 | // shared archive). |
duke@435 | 466 | |
duke@435 | 467 | void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { |
duke@435 | 468 | closure->do_oop(tags_addr()); |
duke@435 | 469 | } |
duke@435 | 470 | |
duke@435 | 471 | |
duke@435 | 472 | // Iterate over String objects (in preparation for writing to the shared |
duke@435 | 473 | // archive). |
duke@435 | 474 | |
duke@435 | 475 | void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { |
duke@435 | 476 | for (int index = 1; index < length(); index++) { // Index 0 is unused |
duke@435 | 477 | switch (tag_at(index).value()) { |
duke@435 | 478 | |
duke@435 | 479 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 480 | case JVM_CONSTANT_NameAndType: |
duke@435 | 481 | // Do nothing! Not a String. |
duke@435 | 482 | break; |
duke@435 | 483 | |
duke@435 | 484 | case JVM_CONSTANT_Class: |
duke@435 | 485 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 486 | case JVM_CONSTANT_Fieldref: |
duke@435 | 487 | case JVM_CONSTANT_Methodref: |
duke@435 | 488 | case JVM_CONSTANT_Integer: |
duke@435 | 489 | case JVM_CONSTANT_Float: |
duke@435 | 490 | // Do nothing! Not an oop. |
duke@435 | 491 | // These constant types do not reference symbols at this point. |
duke@435 | 492 | break; |
duke@435 | 493 | |
duke@435 | 494 | case JVM_CONSTANT_String: |
duke@435 | 495 | closure->do_oop(obj_at_addr(index)); |
duke@435 | 496 | break; |
duke@435 | 497 | |
duke@435 | 498 | case JVM_CONSTANT_UnresolvedString: |
duke@435 | 499 | case JVM_CONSTANT_Utf8: |
duke@435 | 500 | // These constants are symbols, but unless these symbols are |
duke@435 | 501 | // actually to be used for something, we don't want to mark them. |
duke@435 | 502 | break; |
duke@435 | 503 | |
duke@435 | 504 | case JVM_CONSTANT_Long: |
duke@435 | 505 | case JVM_CONSTANT_Double: |
duke@435 | 506 | // Do nothing! Not an oop. (But takes two pool entries.) |
duke@435 | 507 | ++index; |
duke@435 | 508 | break; |
duke@435 | 509 | |
duke@435 | 510 | default: |
duke@435 | 511 | ShouldNotReachHere(); |
duke@435 | 512 | break; |
duke@435 | 513 | } |
duke@435 | 514 | } |
duke@435 | 515 | } |
duke@435 | 516 | |
duke@435 | 517 | |
duke@435 | 518 | // Compare this constant pool's entry at index1 to the constant pool |
duke@435 | 519 | // cp2's entry at index2. |
duke@435 | 520 | bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, |
duke@435 | 521 | int index2, TRAPS) { |
duke@435 | 522 | |
duke@435 | 523 | jbyte t1 = tag_at(index1).value(); |
duke@435 | 524 | jbyte t2 = cp2->tag_at(index2).value(); |
duke@435 | 525 | |
duke@435 | 526 | |
duke@435 | 527 | // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass |
duke@435 | 528 | // when comparing |
duke@435 | 529 | if (t1 == JVM_CONSTANT_UnresolvedClassInError) { |
duke@435 | 530 | t1 = JVM_CONSTANT_UnresolvedClass; |
duke@435 | 531 | } |
duke@435 | 532 | if (t2 == JVM_CONSTANT_UnresolvedClassInError) { |
duke@435 | 533 | t2 = JVM_CONSTANT_UnresolvedClass; |
duke@435 | 534 | } |
duke@435 | 535 | |
duke@435 | 536 | if (t1 != t2) { |
duke@435 | 537 | // Not the same entry type so there is nothing else to check. Note |
duke@435 | 538 | // that this style of checking will consider resolved/unresolved |
duke@435 | 539 | // class pairs and resolved/unresolved string pairs as different. |
duke@435 | 540 | // From the constantPoolOop API point of view, this is correct |
duke@435 | 541 | // behavior. See constantPoolKlass::merge() to see how this plays |
duke@435 | 542 | // out in the context of constantPoolOop merging. |
duke@435 | 543 | return false; |
duke@435 | 544 | } |
duke@435 | 545 | |
duke@435 | 546 | switch (t1) { |
duke@435 | 547 | case JVM_CONSTANT_Class: |
duke@435 | 548 | { |
duke@435 | 549 | klassOop k1 = klass_at(index1, CHECK_false); |
duke@435 | 550 | klassOop k2 = cp2->klass_at(index2, CHECK_false); |
duke@435 | 551 | if (k1 == k2) { |
duke@435 | 552 | return true; |
duke@435 | 553 | } |
duke@435 | 554 | } break; |
duke@435 | 555 | |
duke@435 | 556 | case JVM_CONSTANT_ClassIndex: |
duke@435 | 557 | { |
duke@435 | 558 | int recur1 = klass_index_at(index1); |
duke@435 | 559 | int recur2 = cp2->klass_index_at(index2); |
duke@435 | 560 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 561 | if (match) { |
duke@435 | 562 | return true; |
duke@435 | 563 | } |
duke@435 | 564 | } break; |
duke@435 | 565 | |
duke@435 | 566 | case JVM_CONSTANT_Double: |
duke@435 | 567 | { |
duke@435 | 568 | jdouble d1 = double_at(index1); |
duke@435 | 569 | jdouble d2 = cp2->double_at(index2); |
duke@435 | 570 | if (d1 == d2) { |
duke@435 | 571 | return true; |
duke@435 | 572 | } |
duke@435 | 573 | } break; |
duke@435 | 574 | |
duke@435 | 575 | case JVM_CONSTANT_Fieldref: |
duke@435 | 576 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 577 | case JVM_CONSTANT_Methodref: |
duke@435 | 578 | { |
duke@435 | 579 | int recur1 = uncached_klass_ref_index_at(index1); |
duke@435 | 580 | int recur2 = cp2->uncached_klass_ref_index_at(index2); |
duke@435 | 581 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 582 | if (match) { |
duke@435 | 583 | recur1 = uncached_name_and_type_ref_index_at(index1); |
duke@435 | 584 | recur2 = cp2->uncached_name_and_type_ref_index_at(index2); |
duke@435 | 585 | match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 586 | if (match) { |
duke@435 | 587 | return true; |
duke@435 | 588 | } |
duke@435 | 589 | } |
duke@435 | 590 | } break; |
duke@435 | 591 | |
duke@435 | 592 | case JVM_CONSTANT_Float: |
duke@435 | 593 | { |
duke@435 | 594 | jfloat f1 = float_at(index1); |
duke@435 | 595 | jfloat f2 = cp2->float_at(index2); |
duke@435 | 596 | if (f1 == f2) { |
duke@435 | 597 | return true; |
duke@435 | 598 | } |
duke@435 | 599 | } break; |
duke@435 | 600 | |
duke@435 | 601 | case JVM_CONSTANT_Integer: |
duke@435 | 602 | { |
duke@435 | 603 | jint i1 = int_at(index1); |
duke@435 | 604 | jint i2 = cp2->int_at(index2); |
duke@435 | 605 | if (i1 == i2) { |
duke@435 | 606 | return true; |
duke@435 | 607 | } |
duke@435 | 608 | } break; |
duke@435 | 609 | |
duke@435 | 610 | case JVM_CONSTANT_Long: |
duke@435 | 611 | { |
duke@435 | 612 | jlong l1 = long_at(index1); |
duke@435 | 613 | jlong l2 = cp2->long_at(index2); |
duke@435 | 614 | if (l1 == l2) { |
duke@435 | 615 | return true; |
duke@435 | 616 | } |
duke@435 | 617 | } break; |
duke@435 | 618 | |
duke@435 | 619 | case JVM_CONSTANT_NameAndType: |
duke@435 | 620 | { |
duke@435 | 621 | int recur1 = name_ref_index_at(index1); |
duke@435 | 622 | int recur2 = cp2->name_ref_index_at(index2); |
duke@435 | 623 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 624 | if (match) { |
duke@435 | 625 | recur1 = signature_ref_index_at(index1); |
duke@435 | 626 | recur2 = cp2->signature_ref_index_at(index2); |
duke@435 | 627 | match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 628 | if (match) { |
duke@435 | 629 | return true; |
duke@435 | 630 | } |
duke@435 | 631 | } |
duke@435 | 632 | } break; |
duke@435 | 633 | |
duke@435 | 634 | case JVM_CONSTANT_String: |
duke@435 | 635 | { |
duke@435 | 636 | oop s1 = string_at(index1, CHECK_false); |
duke@435 | 637 | oop s2 = cp2->string_at(index2, CHECK_false); |
duke@435 | 638 | if (s1 == s2) { |
duke@435 | 639 | return true; |
duke@435 | 640 | } |
duke@435 | 641 | } break; |
duke@435 | 642 | |
duke@435 | 643 | case JVM_CONSTANT_StringIndex: |
duke@435 | 644 | { |
duke@435 | 645 | int recur1 = string_index_at(index1); |
duke@435 | 646 | int recur2 = cp2->string_index_at(index2); |
duke@435 | 647 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 648 | if (match) { |
duke@435 | 649 | return true; |
duke@435 | 650 | } |
duke@435 | 651 | } break; |
duke@435 | 652 | |
duke@435 | 653 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 654 | { |
duke@435 | 655 | symbolOop k1 = unresolved_klass_at(index1); |
duke@435 | 656 | symbolOop k2 = cp2->unresolved_klass_at(index2); |
duke@435 | 657 | if (k1 == k2) { |
duke@435 | 658 | return true; |
duke@435 | 659 | } |
duke@435 | 660 | } break; |
duke@435 | 661 | |
duke@435 | 662 | case JVM_CONSTANT_UnresolvedString: |
duke@435 | 663 | { |
duke@435 | 664 | symbolOop s1 = unresolved_string_at(index1); |
duke@435 | 665 | symbolOop s2 = cp2->unresolved_string_at(index2); |
duke@435 | 666 | if (s1 == s2) { |
duke@435 | 667 | return true; |
duke@435 | 668 | } |
duke@435 | 669 | } break; |
duke@435 | 670 | |
duke@435 | 671 | case JVM_CONSTANT_Utf8: |
duke@435 | 672 | { |
duke@435 | 673 | symbolOop s1 = symbol_at(index1); |
duke@435 | 674 | symbolOop s2 = cp2->symbol_at(index2); |
duke@435 | 675 | if (s1 == s2) { |
duke@435 | 676 | return true; |
duke@435 | 677 | } |
duke@435 | 678 | } break; |
duke@435 | 679 | |
duke@435 | 680 | // Invalid is used as the tag for the second constant pool entry |
duke@435 | 681 | // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should |
duke@435 | 682 | // not be seen by itself. |
duke@435 | 683 | case JVM_CONSTANT_Invalid: // fall through |
duke@435 | 684 | |
duke@435 | 685 | default: |
duke@435 | 686 | ShouldNotReachHere(); |
duke@435 | 687 | break; |
duke@435 | 688 | } |
duke@435 | 689 | |
duke@435 | 690 | return false; |
duke@435 | 691 | } // end compare_entry_to() |
duke@435 | 692 | |
duke@435 | 693 | |
duke@435 | 694 | // Copy this constant pool's entries at start_i to end_i (inclusive) |
duke@435 | 695 | // to the constant pool to_cp's entries starting at to_i. A total of |
duke@435 | 696 | // (end_i - start_i) + 1 entries are copied. |
duke@435 | 697 | void constantPoolOopDesc::copy_cp_to(int start_i, int end_i, |
duke@435 | 698 | constantPoolHandle to_cp, int to_i, TRAPS) { |
duke@435 | 699 | |
duke@435 | 700 | int dest_i = to_i; // leave original alone for debug purposes |
duke@435 | 701 | |
duke@435 | 702 | for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { |
duke@435 | 703 | copy_entry_to(src_i, to_cp, dest_i, CHECK); |
duke@435 | 704 | |
duke@435 | 705 | switch (tag_at(src_i).value()) { |
duke@435 | 706 | case JVM_CONSTANT_Double: |
duke@435 | 707 | case JVM_CONSTANT_Long: |
duke@435 | 708 | // double and long take two constant pool entries |
duke@435 | 709 | src_i += 2; |
duke@435 | 710 | dest_i += 2; |
duke@435 | 711 | break; |
duke@435 | 712 | |
duke@435 | 713 | default: |
duke@435 | 714 | // all others take one constant pool entry |
duke@435 | 715 | src_i++; |
duke@435 | 716 | dest_i++; |
duke@435 | 717 | break; |
duke@435 | 718 | } |
duke@435 | 719 | } |
duke@435 | 720 | } // end copy_cp_to() |
duke@435 | 721 | |
duke@435 | 722 | |
duke@435 | 723 | // Copy this constant pool's entry at from_i to the constant pool |
duke@435 | 724 | // to_cp's entry at to_i. |
duke@435 | 725 | void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp, |
duke@435 | 726 | int to_i, TRAPS) { |
duke@435 | 727 | |
duke@435 | 728 | switch (tag_at(from_i).value()) { |
duke@435 | 729 | case JVM_CONSTANT_Class: |
duke@435 | 730 | { |
duke@435 | 731 | klassOop k = klass_at(from_i, CHECK); |
duke@435 | 732 | to_cp->klass_at_put(to_i, k); |
duke@435 | 733 | } break; |
duke@435 | 734 | |
duke@435 | 735 | case JVM_CONSTANT_ClassIndex: |
duke@435 | 736 | { |
duke@435 | 737 | jint ki = klass_index_at(from_i); |
duke@435 | 738 | to_cp->klass_index_at_put(to_i, ki); |
duke@435 | 739 | } break; |
duke@435 | 740 | |
duke@435 | 741 | case JVM_CONSTANT_Double: |
duke@435 | 742 | { |
duke@435 | 743 | jdouble d = double_at(from_i); |
duke@435 | 744 | to_cp->double_at_put(to_i, d); |
duke@435 | 745 | // double takes two constant pool entries so init second entry's tag |
duke@435 | 746 | to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); |
duke@435 | 747 | } break; |
duke@435 | 748 | |
duke@435 | 749 | case JVM_CONSTANT_Fieldref: |
duke@435 | 750 | { |
duke@435 | 751 | int class_index = uncached_klass_ref_index_at(from_i); |
duke@435 | 752 | int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); |
duke@435 | 753 | to_cp->field_at_put(to_i, class_index, name_and_type_index); |
duke@435 | 754 | } break; |
duke@435 | 755 | |
duke@435 | 756 | case JVM_CONSTANT_Float: |
duke@435 | 757 | { |
duke@435 | 758 | jfloat f = float_at(from_i); |
duke@435 | 759 | to_cp->float_at_put(to_i, f); |
duke@435 | 760 | } break; |
duke@435 | 761 | |
duke@435 | 762 | case JVM_CONSTANT_Integer: |
duke@435 | 763 | { |
duke@435 | 764 | jint i = int_at(from_i); |
duke@435 | 765 | to_cp->int_at_put(to_i, i); |
duke@435 | 766 | } break; |
duke@435 | 767 | |
duke@435 | 768 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 769 | { |
duke@435 | 770 | int class_index = uncached_klass_ref_index_at(from_i); |
duke@435 | 771 | int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); |
duke@435 | 772 | to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); |
duke@435 | 773 | } break; |
duke@435 | 774 | |
duke@435 | 775 | case JVM_CONSTANT_Long: |
duke@435 | 776 | { |
duke@435 | 777 | jlong l = long_at(from_i); |
duke@435 | 778 | to_cp->long_at_put(to_i, l); |
duke@435 | 779 | // long takes two constant pool entries so init second entry's tag |
duke@435 | 780 | to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); |
duke@435 | 781 | } break; |
duke@435 | 782 | |
duke@435 | 783 | case JVM_CONSTANT_Methodref: |
duke@435 | 784 | { |
duke@435 | 785 | int class_index = uncached_klass_ref_index_at(from_i); |
duke@435 | 786 | int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); |
duke@435 | 787 | to_cp->method_at_put(to_i, class_index, name_and_type_index); |
duke@435 | 788 | } break; |
duke@435 | 789 | |
duke@435 | 790 | case JVM_CONSTANT_NameAndType: |
duke@435 | 791 | { |
duke@435 | 792 | int name_ref_index = name_ref_index_at(from_i); |
duke@435 | 793 | int signature_ref_index = signature_ref_index_at(from_i); |
duke@435 | 794 | to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); |
duke@435 | 795 | } break; |
duke@435 | 796 | |
duke@435 | 797 | case JVM_CONSTANT_String: |
duke@435 | 798 | { |
duke@435 | 799 | oop s = string_at(from_i, CHECK); |
duke@435 | 800 | to_cp->string_at_put(to_i, s); |
duke@435 | 801 | } break; |
duke@435 | 802 | |
duke@435 | 803 | case JVM_CONSTANT_StringIndex: |
duke@435 | 804 | { |
duke@435 | 805 | jint si = string_index_at(from_i); |
duke@435 | 806 | to_cp->string_index_at_put(to_i, si); |
duke@435 | 807 | } break; |
duke@435 | 808 | |
duke@435 | 809 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 810 | { |
duke@435 | 811 | symbolOop k = unresolved_klass_at(from_i); |
duke@435 | 812 | to_cp->unresolved_klass_at_put(to_i, k); |
duke@435 | 813 | } break; |
duke@435 | 814 | |
duke@435 | 815 | case JVM_CONSTANT_UnresolvedClassInError: |
duke@435 | 816 | { |
duke@435 | 817 | symbolOop k = unresolved_klass_at(from_i); |
duke@435 | 818 | to_cp->unresolved_klass_at_put(to_i, k); |
duke@435 | 819 | to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); |
duke@435 | 820 | } break; |
duke@435 | 821 | |
duke@435 | 822 | |
duke@435 | 823 | case JVM_CONSTANT_UnresolvedString: |
duke@435 | 824 | { |
duke@435 | 825 | symbolOop s = unresolved_string_at(from_i); |
duke@435 | 826 | to_cp->unresolved_string_at_put(to_i, s); |
duke@435 | 827 | } break; |
duke@435 | 828 | |
duke@435 | 829 | case JVM_CONSTANT_Utf8: |
duke@435 | 830 | { |
duke@435 | 831 | symbolOop s = symbol_at(from_i); |
duke@435 | 832 | to_cp->symbol_at_put(to_i, s); |
duke@435 | 833 | } break; |
duke@435 | 834 | |
duke@435 | 835 | // Invalid is used as the tag for the second constant pool entry |
duke@435 | 836 | // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should |
duke@435 | 837 | // not be seen by itself. |
duke@435 | 838 | case JVM_CONSTANT_Invalid: // fall through |
duke@435 | 839 | |
duke@435 | 840 | default: |
duke@435 | 841 | { |
duke@435 | 842 | jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb |
duke@435 | 843 | ShouldNotReachHere(); |
duke@435 | 844 | } break; |
duke@435 | 845 | } |
duke@435 | 846 | } // end copy_entry_to() |
duke@435 | 847 | |
duke@435 | 848 | |
duke@435 | 849 | // Search constant pool search_cp for an entry that matches this |
duke@435 | 850 | // constant pool's entry at pattern_i. Returns the index of a |
duke@435 | 851 | // matching entry or zero (0) if there is no matching entry. |
duke@435 | 852 | int constantPoolOopDesc::find_matching_entry(int pattern_i, |
duke@435 | 853 | constantPoolHandle search_cp, TRAPS) { |
duke@435 | 854 | |
duke@435 | 855 | // index zero (0) is not used |
duke@435 | 856 | for (int i = 1; i < search_cp->length(); i++) { |
duke@435 | 857 | bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); |
duke@435 | 858 | if (found) { |
duke@435 | 859 | return i; |
duke@435 | 860 | } |
duke@435 | 861 | } |
duke@435 | 862 | |
duke@435 | 863 | return 0; // entry not found; return unused index zero (0) |
duke@435 | 864 | } // end find_matching_entry() |
duke@435 | 865 | |
duke@435 | 866 | |
duke@435 | 867 | #ifndef PRODUCT |
duke@435 | 868 | |
duke@435 | 869 | const char* constantPoolOopDesc::printable_name_at(int which) { |
duke@435 | 870 | |
duke@435 | 871 | constantTag tag = tag_at(which); |
duke@435 | 872 | |
duke@435 | 873 | if (tag.is_unresolved_string() || tag.is_string()) { |
duke@435 | 874 | return string_at_noresolve(which); |
duke@435 | 875 | } else if (tag.is_klass() || tag.is_unresolved_klass()) { |
duke@435 | 876 | return klass_name_at(which)->as_C_string(); |
duke@435 | 877 | } else if (tag.is_symbol()) { |
duke@435 | 878 | return symbol_at(which)->as_C_string(); |
duke@435 | 879 | } |
duke@435 | 880 | return ""; |
duke@435 | 881 | } |
duke@435 | 882 | |
duke@435 | 883 | #endif // PRODUCT |
duke@435 | 884 | |
duke@435 | 885 | |
duke@435 | 886 | // JVMTI GetConstantPool support |
duke@435 | 887 | |
duke@435 | 888 | // For temporary use until code is stable. |
duke@435 | 889 | #define DBG(code) |
duke@435 | 890 | |
duke@435 | 891 | static const char* WARN_MSG = "Must not be such entry!"; |
duke@435 | 892 | |
duke@435 | 893 | static void print_cpool_bytes(jint cnt, u1 *bytes) { |
duke@435 | 894 | jint size = 0; |
duke@435 | 895 | u2 idx1, idx2; |
duke@435 | 896 | |
duke@435 | 897 | for (jint idx = 1; idx < cnt; idx++) { |
duke@435 | 898 | jint ent_size = 0; |
duke@435 | 899 | u1 tag = *bytes++; |
duke@435 | 900 | size++; // count tag |
duke@435 | 901 | |
duke@435 | 902 | printf("const #%03d, tag: %02d ", idx, tag); |
duke@435 | 903 | switch(tag) { |
duke@435 | 904 | case JVM_CONSTANT_Invalid: { |
duke@435 | 905 | printf("Invalid"); |
duke@435 | 906 | break; |
duke@435 | 907 | } |
duke@435 | 908 | case JVM_CONSTANT_Unicode: { |
duke@435 | 909 | printf("Unicode %s", WARN_MSG); |
duke@435 | 910 | break; |
duke@435 | 911 | } |
duke@435 | 912 | case JVM_CONSTANT_Utf8: { |
duke@435 | 913 | u2 len = Bytes::get_Java_u2(bytes); |
duke@435 | 914 | char str[128]; |
duke@435 | 915 | if (len > 127) { |
duke@435 | 916 | len = 127; |
duke@435 | 917 | } |
duke@435 | 918 | strncpy(str, (char *) (bytes+2), len); |
duke@435 | 919 | str[len] = '\0'; |
duke@435 | 920 | printf("Utf8 \"%s\"", str); |
duke@435 | 921 | ent_size = 2 + len; |
duke@435 | 922 | break; |
duke@435 | 923 | } |
duke@435 | 924 | case JVM_CONSTANT_Integer: { |
duke@435 | 925 | u4 val = Bytes::get_Java_u4(bytes); |
duke@435 | 926 | printf("int %d", *(int *) &val); |
duke@435 | 927 | ent_size = 4; |
duke@435 | 928 | break; |
duke@435 | 929 | } |
duke@435 | 930 | case JVM_CONSTANT_Float: { |
duke@435 | 931 | u4 val = Bytes::get_Java_u4(bytes); |
duke@435 | 932 | printf("float %5.3ff", *(float *) &val); |
duke@435 | 933 | ent_size = 4; |
duke@435 | 934 | break; |
duke@435 | 935 | } |
duke@435 | 936 | case JVM_CONSTANT_Long: { |
duke@435 | 937 | u8 val = Bytes::get_Java_u8(bytes); |
duke@435 | 938 | printf("long %lldl", *(jlong *) &val); |
duke@435 | 939 | ent_size = 8; |
duke@435 | 940 | idx++; // Long takes two cpool slots |
duke@435 | 941 | break; |
duke@435 | 942 | } |
duke@435 | 943 | case JVM_CONSTANT_Double: { |
duke@435 | 944 | u8 val = Bytes::get_Java_u8(bytes); |
duke@435 | 945 | printf("double %5.3fd", *(jdouble *)&val); |
duke@435 | 946 | ent_size = 8; |
duke@435 | 947 | idx++; // Double takes two cpool slots |
duke@435 | 948 | break; |
duke@435 | 949 | } |
duke@435 | 950 | case JVM_CONSTANT_Class: { |
duke@435 | 951 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 952 | printf("class #%03d", idx1); |
duke@435 | 953 | ent_size = 2; |
duke@435 | 954 | break; |
duke@435 | 955 | } |
duke@435 | 956 | case JVM_CONSTANT_String: { |
duke@435 | 957 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 958 | printf("String #%03d", idx1); |
duke@435 | 959 | ent_size = 2; |
duke@435 | 960 | break; |
duke@435 | 961 | } |
duke@435 | 962 | case JVM_CONSTANT_Fieldref: { |
duke@435 | 963 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 964 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 965 | printf("Field #%03d, #%03d", (int) idx1, (int) idx2); |
duke@435 | 966 | ent_size = 4; |
duke@435 | 967 | break; |
duke@435 | 968 | } |
duke@435 | 969 | case JVM_CONSTANT_Methodref: { |
duke@435 | 970 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 971 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 972 | printf("Method #%03d, #%03d", idx1, idx2); |
duke@435 | 973 | ent_size = 4; |
duke@435 | 974 | break; |
duke@435 | 975 | } |
duke@435 | 976 | case JVM_CONSTANT_InterfaceMethodref: { |
duke@435 | 977 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 978 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 979 | printf("InterfMethod #%03d, #%03d", idx1, idx2); |
duke@435 | 980 | ent_size = 4; |
duke@435 | 981 | break; |
duke@435 | 982 | } |
duke@435 | 983 | case JVM_CONSTANT_NameAndType: { |
duke@435 | 984 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 985 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 986 | printf("NameAndType #%03d, #%03d", idx1, idx2); |
duke@435 | 987 | ent_size = 4; |
duke@435 | 988 | break; |
duke@435 | 989 | } |
duke@435 | 990 | case JVM_CONSTANT_ClassIndex: { |
duke@435 | 991 | printf("ClassIndex %s", WARN_MSG); |
duke@435 | 992 | break; |
duke@435 | 993 | } |
duke@435 | 994 | case JVM_CONSTANT_UnresolvedClass: { |
duke@435 | 995 | printf("UnresolvedClass: %s", WARN_MSG); |
duke@435 | 996 | break; |
duke@435 | 997 | } |
duke@435 | 998 | case JVM_CONSTANT_UnresolvedClassInError: { |
duke@435 | 999 | printf("UnresolvedClassInErr: %s", WARN_MSG); |
duke@435 | 1000 | break; |
duke@435 | 1001 | } |
duke@435 | 1002 | case JVM_CONSTANT_StringIndex: { |
duke@435 | 1003 | printf("StringIndex: %s", WARN_MSG); |
duke@435 | 1004 | break; |
duke@435 | 1005 | } |
duke@435 | 1006 | case JVM_CONSTANT_UnresolvedString: { |
duke@435 | 1007 | printf("UnresolvedString: %s", WARN_MSG); |
duke@435 | 1008 | break; |
duke@435 | 1009 | } |
duke@435 | 1010 | } |
duke@435 | 1011 | printf(";\n"); |
duke@435 | 1012 | bytes += ent_size; |
duke@435 | 1013 | size += ent_size; |
duke@435 | 1014 | } |
duke@435 | 1015 | printf("Cpool size: %d\n", size); |
duke@435 | 1016 | fflush(0); |
duke@435 | 1017 | return; |
duke@435 | 1018 | } /* end print_cpool_bytes */ |
duke@435 | 1019 | |
duke@435 | 1020 | |
duke@435 | 1021 | // Returns size of constant pool entry. |
duke@435 | 1022 | jint constantPoolOopDesc::cpool_entry_size(jint idx) { |
duke@435 | 1023 | switch(tag_at(idx).value()) { |
duke@435 | 1024 | case JVM_CONSTANT_Invalid: |
duke@435 | 1025 | case JVM_CONSTANT_Unicode: |
duke@435 | 1026 | return 1; |
duke@435 | 1027 | |
duke@435 | 1028 | case JVM_CONSTANT_Utf8: |
duke@435 | 1029 | return 3 + symbol_at(idx)->utf8_length(); |
duke@435 | 1030 | |
duke@435 | 1031 | case JVM_CONSTANT_Class: |
duke@435 | 1032 | case JVM_CONSTANT_String: |
duke@435 | 1033 | case JVM_CONSTANT_ClassIndex: |
duke@435 | 1034 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 1035 | case JVM_CONSTANT_UnresolvedClassInError: |
duke@435 | 1036 | case JVM_CONSTANT_StringIndex: |
duke@435 | 1037 | case JVM_CONSTANT_UnresolvedString: |
duke@435 | 1038 | return 3; |
duke@435 | 1039 | |
duke@435 | 1040 | case JVM_CONSTANT_Integer: |
duke@435 | 1041 | case JVM_CONSTANT_Float: |
duke@435 | 1042 | case JVM_CONSTANT_Fieldref: |
duke@435 | 1043 | case JVM_CONSTANT_Methodref: |
duke@435 | 1044 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 1045 | case JVM_CONSTANT_NameAndType: |
duke@435 | 1046 | return 5; |
duke@435 | 1047 | |
duke@435 | 1048 | case JVM_CONSTANT_Long: |
duke@435 | 1049 | case JVM_CONSTANT_Double: |
duke@435 | 1050 | return 9; |
duke@435 | 1051 | } |
duke@435 | 1052 | assert(false, "cpool_entry_size: Invalid constant pool entry tag"); |
duke@435 | 1053 | return 1; |
duke@435 | 1054 | } /* end cpool_entry_size */ |
duke@435 | 1055 | |
duke@435 | 1056 | |
duke@435 | 1057 | // SymbolHashMap is used to find a constant pool index from a string. |
duke@435 | 1058 | // This function fills in SymbolHashMaps, one for utf8s and one for |
duke@435 | 1059 | // class names, returns size of the cpool raw bytes. |
duke@435 | 1060 | jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, |
duke@435 | 1061 | SymbolHashMap *classmap) { |
duke@435 | 1062 | jint size = 0; |
duke@435 | 1063 | |
duke@435 | 1064 | for (u2 idx = 1; idx < length(); idx++) { |
duke@435 | 1065 | u2 tag = tag_at(idx).value(); |
duke@435 | 1066 | size += cpool_entry_size(idx); |
duke@435 | 1067 | |
duke@435 | 1068 | switch(tag) { |
duke@435 | 1069 | case JVM_CONSTANT_Utf8: { |
duke@435 | 1070 | symbolOop sym = symbol_at(idx); |
duke@435 | 1071 | symmap->add_entry(sym, idx); |
duke@435 | 1072 | DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); |
duke@435 | 1073 | break; |
duke@435 | 1074 | } |
duke@435 | 1075 | case JVM_CONSTANT_Class: |
duke@435 | 1076 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 1077 | case JVM_CONSTANT_UnresolvedClassInError: { |
duke@435 | 1078 | symbolOop sym = klass_name_at(idx); |
duke@435 | 1079 | classmap->add_entry(sym, idx); |
duke@435 | 1080 | DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); |
duke@435 | 1081 | break; |
duke@435 | 1082 | } |
duke@435 | 1083 | case JVM_CONSTANT_Long: |
duke@435 | 1084 | case JVM_CONSTANT_Double: { |
duke@435 | 1085 | idx++; // Both Long and Double take two cpool slots |
duke@435 | 1086 | break; |
duke@435 | 1087 | } |
duke@435 | 1088 | } |
duke@435 | 1089 | } |
duke@435 | 1090 | return size; |
duke@435 | 1091 | } /* end hash_utf8_entries_to */ |
duke@435 | 1092 | |
duke@435 | 1093 | |
duke@435 | 1094 | // Copy cpool bytes. |
duke@435 | 1095 | // Returns: |
duke@435 | 1096 | // 0, in case of OutOfMemoryError |
duke@435 | 1097 | // -1, in case of internal error |
duke@435 | 1098 | // > 0, count of the raw cpool bytes that have been copied |
duke@435 | 1099 | int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, |
duke@435 | 1100 | SymbolHashMap* tbl, |
duke@435 | 1101 | unsigned char *bytes) { |
duke@435 | 1102 | u2 idx1, idx2; |
duke@435 | 1103 | jint size = 0; |
duke@435 | 1104 | jint cnt = length(); |
duke@435 | 1105 | unsigned char *start_bytes = bytes; |
duke@435 | 1106 | |
duke@435 | 1107 | for (jint idx = 1; idx < cnt; idx++) { |
duke@435 | 1108 | u1 tag = tag_at(idx).value(); |
duke@435 | 1109 | jint ent_size = cpool_entry_size(idx); |
duke@435 | 1110 | |
duke@435 | 1111 | assert(size + ent_size <= cpool_size, "Size mismatch"); |
duke@435 | 1112 | |
duke@435 | 1113 | *bytes = tag; |
duke@435 | 1114 | DBG(printf("#%03hd tag=%03hd, ", idx, tag)); |
duke@435 | 1115 | switch(tag) { |
duke@435 | 1116 | case JVM_CONSTANT_Invalid: { |
duke@435 | 1117 | DBG(printf("JVM_CONSTANT_Invalid")); |
duke@435 | 1118 | break; |
duke@435 | 1119 | } |
duke@435 | 1120 | case JVM_CONSTANT_Unicode: { |
duke@435 | 1121 | assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); |
duke@435 | 1122 | DBG(printf("JVM_CONSTANT_Unicode")); |
duke@435 | 1123 | break; |
duke@435 | 1124 | } |
duke@435 | 1125 | case JVM_CONSTANT_Utf8: { |
duke@435 | 1126 | symbolOop sym = symbol_at(idx); |
duke@435 | 1127 | char* str = sym->as_utf8(); |
duke@435 | 1128 | // Warning! It's crashing on x86 with len = sym->utf8_length() |
duke@435 | 1129 | int len = (int) strlen(str); |
duke@435 | 1130 | Bytes::put_Java_u2((address) (bytes+1), (u2) len); |
duke@435 | 1131 | for (int i = 0; i < len; i++) { |
duke@435 | 1132 | bytes[3+i] = (u1) str[i]; |
duke@435 | 1133 | } |
duke@435 | 1134 | DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); |
duke@435 | 1135 | break; |
duke@435 | 1136 | } |
duke@435 | 1137 | case JVM_CONSTANT_Integer: { |
duke@435 | 1138 | jint val = int_at(idx); |
duke@435 | 1139 | Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); |
duke@435 | 1140 | break; |
duke@435 | 1141 | } |
duke@435 | 1142 | case JVM_CONSTANT_Float: { |
duke@435 | 1143 | jfloat val = float_at(idx); |
duke@435 | 1144 | Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); |
duke@435 | 1145 | break; |
duke@435 | 1146 | } |
duke@435 | 1147 | case JVM_CONSTANT_Long: { |
duke@435 | 1148 | jlong val = long_at(idx); |
duke@435 | 1149 | Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); |
duke@435 | 1150 | idx++; // Long takes two cpool slots |
duke@435 | 1151 | break; |
duke@435 | 1152 | } |
duke@435 | 1153 | case JVM_CONSTANT_Double: { |
duke@435 | 1154 | jdouble val = double_at(idx); |
duke@435 | 1155 | Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); |
duke@435 | 1156 | idx++; // Double takes two cpool slots |
duke@435 | 1157 | break; |
duke@435 | 1158 | } |
duke@435 | 1159 | case JVM_CONSTANT_Class: |
duke@435 | 1160 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 1161 | case JVM_CONSTANT_UnresolvedClassInError: { |
duke@435 | 1162 | *bytes = JVM_CONSTANT_Class; |
duke@435 | 1163 | symbolOop sym = klass_name_at(idx); |
duke@435 | 1164 | idx1 = tbl->symbol_to_value(sym); |
duke@435 | 1165 | assert(idx1 != 0, "Have not found a hashtable entry"); |
duke@435 | 1166 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1167 | DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); |
duke@435 | 1168 | break; |
duke@435 | 1169 | } |
duke@435 | 1170 | case JVM_CONSTANT_String: { |
duke@435 | 1171 | unsigned int hash; |
duke@435 | 1172 | char *str = string_at_noresolve(idx); |
duke@435 | 1173 | symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); |
duke@435 | 1174 | idx1 = tbl->symbol_to_value(sym); |
duke@435 | 1175 | assert(idx1 != 0, "Have not found a hashtable entry"); |
duke@435 | 1176 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1177 | DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); |
duke@435 | 1178 | break; |
duke@435 | 1179 | } |
duke@435 | 1180 | case JVM_CONSTANT_UnresolvedString: { |
duke@435 | 1181 | *bytes = JVM_CONSTANT_String; |
duke@435 | 1182 | symbolOop sym = unresolved_string_at(idx); |
duke@435 | 1183 | idx1 = tbl->symbol_to_value(sym); |
duke@435 | 1184 | assert(idx1 != 0, "Have not found a hashtable entry"); |
duke@435 | 1185 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1186 | DBG(char *str = sym->as_utf8()); |
duke@435 | 1187 | DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); |
duke@435 | 1188 | break; |
duke@435 | 1189 | } |
duke@435 | 1190 | case JVM_CONSTANT_Fieldref: |
duke@435 | 1191 | case JVM_CONSTANT_Methodref: |
duke@435 | 1192 | case JVM_CONSTANT_InterfaceMethodref: { |
duke@435 | 1193 | idx1 = uncached_klass_ref_index_at(idx); |
duke@435 | 1194 | idx2 = uncached_name_and_type_ref_index_at(idx); |
duke@435 | 1195 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1196 | Bytes::put_Java_u2((address) (bytes+3), idx2); |
duke@435 | 1197 | DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); |
duke@435 | 1198 | break; |
duke@435 | 1199 | } |
duke@435 | 1200 | case JVM_CONSTANT_NameAndType: { |
duke@435 | 1201 | idx1 = name_ref_index_at(idx); |
duke@435 | 1202 | idx2 = signature_ref_index_at(idx); |
duke@435 | 1203 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1204 | Bytes::put_Java_u2((address) (bytes+3), idx2); |
duke@435 | 1205 | DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); |
duke@435 | 1206 | break; |
duke@435 | 1207 | } |
duke@435 | 1208 | case JVM_CONSTANT_ClassIndex: { |
duke@435 | 1209 | *bytes = JVM_CONSTANT_Class; |
duke@435 | 1210 | idx1 = klass_index_at(idx); |
duke@435 | 1211 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1212 | DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); |
duke@435 | 1213 | break; |
duke@435 | 1214 | } |
duke@435 | 1215 | case JVM_CONSTANT_StringIndex: { |
duke@435 | 1216 | *bytes = JVM_CONSTANT_String; |
duke@435 | 1217 | idx1 = string_index_at(idx); |
duke@435 | 1218 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1219 | DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); |
duke@435 | 1220 | break; |
duke@435 | 1221 | } |
duke@435 | 1222 | } |
duke@435 | 1223 | DBG(printf("\n")); |
duke@435 | 1224 | bytes += ent_size; |
duke@435 | 1225 | size += ent_size; |
duke@435 | 1226 | } |
duke@435 | 1227 | assert(size == cpool_size, "Size mismatch"); |
duke@435 | 1228 | |
duke@435 | 1229 | // Keep temorarily for debugging until it's stable. |
duke@435 | 1230 | DBG(print_cpool_bytes(cnt, start_bytes)); |
duke@435 | 1231 | return (int)(bytes - start_bytes); |
duke@435 | 1232 | } /* end copy_cpool_bytes */ |
duke@435 | 1233 | |
duke@435 | 1234 | |
duke@435 | 1235 | void SymbolHashMap::add_entry(symbolOop sym, u2 value) { |
duke@435 | 1236 | char *str = sym->as_utf8(); |
duke@435 | 1237 | unsigned int hash = compute_hash(str, sym->utf8_length()); |
duke@435 | 1238 | unsigned int index = hash % table_size(); |
duke@435 | 1239 | |
duke@435 | 1240 | // check if already in map |
duke@435 | 1241 | // we prefer the first entry since it is more likely to be what was used in |
duke@435 | 1242 | // the class file |
duke@435 | 1243 | for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { |
duke@435 | 1244 | assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); |
duke@435 | 1245 | if (en->hash() == hash && en->symbol() == sym) { |
duke@435 | 1246 | return; // already there |
duke@435 | 1247 | } |
duke@435 | 1248 | } |
duke@435 | 1249 | |
duke@435 | 1250 | SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); |
duke@435 | 1251 | entry->set_next(bucket(index)); |
duke@435 | 1252 | _buckets[index].set_entry(entry); |
duke@435 | 1253 | assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); |
duke@435 | 1254 | } |
duke@435 | 1255 | |
duke@435 | 1256 | SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) { |
duke@435 | 1257 | assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); |
duke@435 | 1258 | char *str = sym->as_utf8(); |
duke@435 | 1259 | int len = sym->utf8_length(); |
duke@435 | 1260 | unsigned int hash = SymbolHashMap::compute_hash(str, len); |
duke@435 | 1261 | unsigned int index = hash % table_size(); |
duke@435 | 1262 | for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { |
duke@435 | 1263 | assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); |
duke@435 | 1264 | if (en->hash() == hash && en->symbol() == sym) { |
duke@435 | 1265 | return en; |
duke@435 | 1266 | } |
duke@435 | 1267 | } |
duke@435 | 1268 | return NULL; |
duke@435 | 1269 | } |