1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/symbolTable.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "gc_interface/collectedHeap.hpp" 30 #include "gc_interface/collectedHeap.inline.hpp" 31 #include "memory/metadataFactory.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "memory/universe.hpp" 34 #include "memory/universe.inline.hpp" 35 #include "oops/instanceKlass.hpp" 36 #include "oops/klass.inline.hpp" 37 #include "oops/objArrayKlass.hpp" 38 #include "oops/oop.inline.hpp" 39 #include "oops/typeArrayKlass.hpp" 40 #include "oops/typeArrayOop.hpp" 41 #include "runtime/handles.inline.hpp" 42 #include "runtime/orderAccess.inline.hpp" 43 #include "utilities/macros.hpp" 44 45 bool TypeArrayKlass::compute_is_subtype_of(Klass* k) { 46 if (!k->oop_is_typeArray()) { 47 return ArrayKlass::compute_is_subtype_of(k); 48 } 49 50 TypeArrayKlass* tak = TypeArrayKlass::cast(k); 51 if (dimension() != tak->dimension()) return false; 52 53 return element_type() == tak->element_type(); 54 } 55 56 TypeArrayKlass* TypeArrayKlass::create_klass(BasicType type, 57 const char* name_str, TRAPS) { 58 Symbol* sym = NULL; 59 if (name_str != NULL) { 60 sym = SymbolTable::new_permanent_symbol(name_str, CHECK_NULL); 61 } 62 63 ClassLoaderData* null_loader_data = ClassLoaderData::the_null_class_loader_data(); 64 65 TypeArrayKlass* ak = TypeArrayKlass::allocate(null_loader_data, type, sym, CHECK_NULL); 66 67 // Add all classes to our internal class loader list here, 68 // including classes in the bootstrap (NULL) class loader. 69 // GC walks these as strong roots. 70 null_loader_data->add_class(ak); 71 72 // Call complete_create_array_klass after all instance variables have been initialized. 73 complete_create_array_klass(ak, ak->super(), CHECK_NULL); 74 75 return ak; 76 } 77 78 TypeArrayKlass* TypeArrayKlass::allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS) { 79 assert(TypeArrayKlass::header_size() <= InstanceKlass::header_size(), 80 "array klasses must be same size as InstanceKlass"); 81 82 int size = ArrayKlass::static_size(TypeArrayKlass::header_size()); 83 84 return new (loader_data, size, THREAD) TypeArrayKlass(type, name); 85 } 86 87 TypeArrayKlass::TypeArrayKlass(BasicType type, Symbol* name) : ArrayKlass(name) { 88 set_layout_helper(array_layout_helper(type)); 89 assert(oop_is_array(), "sanity"); 90 assert(oop_is_typeArray(), "sanity"); 91 92 set_max_length(arrayOopDesc::max_array_length(type)); 93 assert(size() >= TypeArrayKlass::header_size(), "bad size"); 94 95 set_class_loader_data(ClassLoaderData::the_null_class_loader_data()); 96 } 97 98 typeArrayOop TypeArrayKlass::allocate_common(int length, bool do_zero, TRAPS) { 99 assert(log2_element_size() >= 0, "bad scale"); 100 if (length >= 0) { 101 if (length <= max_length()) { 102 size_t size = typeArrayOopDesc::object_size(layout_helper(), length); 103 KlassHandle h_k(THREAD, this); 104 typeArrayOop t; 105 CollectedHeap* ch = Universe::heap(); 106 if (do_zero) { 107 t = (typeArrayOop)CollectedHeap::array_allocate(h_k, (int)size, length, CHECK_NULL); 108 } else { 109 t = (typeArrayOop)CollectedHeap::array_allocate_nozero(h_k, (int)size, length, CHECK_NULL); 110 } 111 return t; 112 } else { 113 report_java_out_of_memory("Requested array size exceeds VM limit"); 114 JvmtiExport::post_array_size_exhausted(); 115 THROW_OOP_0(Universe::out_of_memory_error_array_size()); 116 } 117 } else { 118 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 119 } 120 } 121 122 oop TypeArrayKlass::multi_allocate(int rank, jint* last_size, TRAPS) { 123 // For typeArrays this is only called for the last dimension 124 assert(rank == 1, "just checking"); 125 int length = *last_size; 126 return allocate(length, THREAD); 127 } 128 129 130 void TypeArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) { 131 assert(s->is_typeArray(), "must be type array"); 132 133 // Check destination 134 if (!d->is_typeArray() || element_type() != TypeArrayKlass::cast(d->klass())->element_type()) { 135 THROW(vmSymbols::java_lang_ArrayStoreException()); 136 } 137 138 // Check is all offsets and lengths are non negative 139 if (src_pos < 0 || dst_pos < 0 || length < 0) { 140 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 141 } 142 // Check if the ranges are valid 143 if ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length()) 144 || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) { 145 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 146 } 147 // Check zero copy 148 if (length == 0) 149 return; 150 151 // This is an attempt to make the copy_array fast. 152 int l2es = log2_element_size(); 153 int ihs = array_header_in_bytes() / wordSize; 154 char* src = (char*) ((oop*)s + ihs) + ((size_t)src_pos << l2es); 155 char* dst = (char*) ((oop*)d + ihs) + ((size_t)dst_pos << l2es); 156 Copy::conjoint_memory_atomic(src, dst, (size_t)length << l2es); 157 } 158 159 160 // create a klass of array holding typeArrays 161 Klass* TypeArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) { 162 int dim = dimension(); 163 assert(dim <= n, "check order of chain"); 164 if (dim == n) 165 return this; 166 167 if (higher_dimension() == NULL) { 168 if (or_null) return NULL; 169 170 ResourceMark rm; 171 JavaThread *jt = (JavaThread *)THREAD; 172 { 173 MutexLocker mc(Compile_lock, THREAD); // for vtables 174 // Atomic create higher dimension and link into list 175 MutexLocker mu(MultiArray_lock, THREAD); 176 177 if (higher_dimension() == NULL) { 178 Klass* oak = ObjArrayKlass::allocate_objArray_klass( 179 class_loader_data(), dim + 1, this, CHECK_NULL); 180 ObjArrayKlass* h_ak = ObjArrayKlass::cast(oak); 181 h_ak->set_lower_dimension(this); 182 OrderAccess::storestore(); 183 set_higher_dimension(h_ak); 184 assert(h_ak->oop_is_objArray(), "incorrect initialization of ObjArrayKlass"); 185 } 186 } 187 } else { 188 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 189 } 190 ObjArrayKlass* h_ak = ObjArrayKlass::cast(higher_dimension()); 191 if (or_null) { 192 return h_ak->array_klass_or_null(n); 193 } 194 return h_ak->array_klass(n, CHECK_NULL); 195 } 196 197 Klass* TypeArrayKlass::array_klass_impl(bool or_null, TRAPS) { 198 return array_klass_impl(or_null, dimension() + 1, THREAD); 199 } 200 201 int TypeArrayKlass::oop_size(oop obj) const { 202 assert(obj->is_typeArray(),"must be a type array"); 203 typeArrayOop t = typeArrayOop(obj); 204 return t->object_size(); 205 } 206 207 void TypeArrayKlass::oop_follow_contents(oop obj) { 208 assert(obj->is_typeArray(),"must be a type array"); 209 // Performance tweak: We skip iterating over the klass pointer since we 210 // know that Universe::TypeArrayKlass never moves. 211 } 212 213 #if INCLUDE_ALL_GCS 214 void TypeArrayKlass::oop_follow_contents(ParCompactionManager* cm, oop obj) { 215 assert(obj->is_typeArray(),"must be a type array"); 216 // Performance tweak: We skip iterating over the klass pointer since we 217 // know that Universe::TypeArrayKlass never moves. 218 } 219 #endif // INCLUDE_ALL_GCS 220 221 int TypeArrayKlass::oop_adjust_pointers(oop obj) { 222 assert(obj->is_typeArray(),"must be a type array"); 223 typeArrayOop t = typeArrayOop(obj); 224 // Performance tweak: We skip iterating over the klass pointer since we 225 // know that Universe::TypeArrayKlass never moves. 226 return t->object_size(); 227 } 228 229 int TypeArrayKlass::get_linear_oop_intervals(oop obj, OopInterval* &start, int &size) { 230 assert(obj->is_typeArray(),"must be a type array"); 231 typeArrayOop a = typeArrayOop(obj); 232 size = a->object_size(); 233 return 0; // there are no oops in here! 234 } 235 236 int TypeArrayKlass::oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { 237 assert(obj->is_typeArray(),"must be a type array"); 238 typeArrayOop t = typeArrayOop(obj); 239 // Performance tweak: We skip iterating over the klass pointer since we 240 // know that Universe::TypeArrayKlass never moves. 241 return t->object_size(); 242 } 243 244 int TypeArrayKlass::oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { 245 assert(obj->is_typeArray(),"must be a type array"); 246 typeArrayOop t = typeArrayOop(obj); 247 // Performance tweak: We skip iterating over the klass pointer since we 248 // know that Universe::TypeArrayKlass never moves. 249 return t->object_size(); 250 } 251 252 #if INCLUDE_ALL_GCS 253 void TypeArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { 254 ShouldNotReachHere(); 255 assert(obj->is_typeArray(),"must be a type array"); 256 } 257 258 int 259 TypeArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { 260 assert(obj->is_typeArray(),"must be a type array"); 261 return typeArrayOop(obj)->object_size(); 262 } 263 #endif // INCLUDE_ALL_GCS 264 265 void TypeArrayKlass::initialize(TRAPS) { 266 // Nothing to do. Having this function is handy since objArrayKlasses can be 267 // initialized by calling initialize on their bottom_klass, see ObjArrayKlass::initialize 268 } 269 270 const char* TypeArrayKlass::external_name(BasicType type) { 271 switch (type) { 272 case T_BOOLEAN: return "[Z"; 273 case T_CHAR: return "[C"; 274 case T_FLOAT: return "[F"; 275 case T_DOUBLE: return "[D"; 276 case T_BYTE: return "[B"; 277 case T_SHORT: return "[S"; 278 case T_INT: return "[I"; 279 case T_LONG: return "[J"; 280 default: ShouldNotReachHere(); 281 } 282 return NULL; 283 } 284 285 286 // Printing 287 288 void TypeArrayKlass::print_on(outputStream* st) const { 289 #ifndef PRODUCT 290 assert(is_klass(), "must be klass"); 291 print_value_on(st); 292 Klass::print_on(st); 293 #endif //PRODUCT 294 } 295 296 void TypeArrayKlass::print_value_on(outputStream* st) const { 297 assert(is_klass(), "must be klass"); 298 st->print("{type array "); 299 switch (element_type()) { 300 case T_BOOLEAN: st->print("bool"); break; 301 case T_CHAR: st->print("char"); break; 302 case T_FLOAT: st->print("float"); break; 303 case T_DOUBLE: st->print("double"); break; 304 case T_BYTE: st->print("byte"); break; 305 case T_SHORT: st->print("short"); break; 306 case T_INT: st->print("int"); break; 307 case T_LONG: st->print("long"); break; 308 default: ShouldNotReachHere(); 309 } 310 st->print("}"); 311 } 312 313 #ifndef PRODUCT 314 315 static void print_boolean_array(typeArrayOop ta, int print_len, outputStream* st) { 316 for (int index = 0; index < print_len; index++) { 317 st->print_cr(" - %3d: %s", index, (ta->bool_at(index) == 0) ? "false" : "true"); 318 } 319 } 320 321 322 static void print_char_array(typeArrayOop ta, int print_len, outputStream* st) { 323 for (int index = 0; index < print_len; index++) { 324 jchar c = ta->char_at(index); 325 st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' '); 326 } 327 } 328 329 330 static void print_float_array(typeArrayOop ta, int print_len, outputStream* st) { 331 for (int index = 0; index < print_len; index++) { 332 st->print_cr(" - %3d: %g", index, ta->float_at(index)); 333 } 334 } 335 336 337 static void print_double_array(typeArrayOop ta, int print_len, outputStream* st) { 338 for (int index = 0; index < print_len; index++) { 339 st->print_cr(" - %3d: %g", index, ta->double_at(index)); 340 } 341 } 342 343 344 static void print_byte_array(typeArrayOop ta, int print_len, outputStream* st) { 345 for (int index = 0; index < print_len; index++) { 346 jbyte c = ta->byte_at(index); 347 st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' '); 348 } 349 } 350 351 352 static void print_short_array(typeArrayOop ta, int print_len, outputStream* st) { 353 for (int index = 0; index < print_len; index++) { 354 int v = ta->ushort_at(index); 355 st->print_cr(" - %3d: 0x%x\t %d", index, v, v); 356 } 357 } 358 359 360 static void print_int_array(typeArrayOop ta, int print_len, outputStream* st) { 361 for (int index = 0; index < print_len; index++) { 362 jint v = ta->int_at(index); 363 st->print_cr(" - %3d: 0x%x %d", index, v, v); 364 } 365 } 366 367 368 static void print_long_array(typeArrayOop ta, int print_len, outputStream* st) { 369 for (int index = 0; index < print_len; index++) { 370 jlong v = ta->long_at(index); 371 st->print_cr(" - %3d: 0x%x 0x%x", index, high(v), low(v)); 372 } 373 } 374 375 376 void TypeArrayKlass::oop_print_on(oop obj, outputStream* st) { 377 ArrayKlass::oop_print_on(obj, st); 378 typeArrayOop ta = typeArrayOop(obj); 379 int print_len = MIN2((intx) ta->length(), MaxElementPrintSize); 380 switch (element_type()) { 381 case T_BOOLEAN: print_boolean_array(ta, print_len, st); break; 382 case T_CHAR: print_char_array(ta, print_len, st); break; 383 case T_FLOAT: print_float_array(ta, print_len, st); break; 384 case T_DOUBLE: print_double_array(ta, print_len, st); break; 385 case T_BYTE: print_byte_array(ta, print_len, st); break; 386 case T_SHORT: print_short_array(ta, print_len, st); break; 387 case T_INT: print_int_array(ta, print_len, st); break; 388 case T_LONG: print_long_array(ta, print_len, st); break; 389 default: ShouldNotReachHere(); 390 } 391 int remaining = ta->length() - print_len; 392 if (remaining > 0) { 393 st->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining); 394 } 395 } 396 397 #endif // PRODUCT 398 399 const char* TypeArrayKlass::internal_name() const { 400 return Klass::external_name(); 401 }