1 /* 2 * Copyright (c) 1997, 2017, 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/javaClasses.inline.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/codeCache.hpp" 30 #include "compiler/compileBroker.hpp" 31 #include "compiler/disassembler.hpp" 32 #include "gc/shared/collectedHeap.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "interpreter/interpreterRuntime.hpp" 35 #include "interpreter/linkResolver.hpp" 36 #include "interpreter/templateTable.hpp" 37 #include "logging/log.hpp" 38 #include "memory/oopFactory.hpp" 39 #include "memory/resourceArea.hpp" 40 #include "memory/universe.inline.hpp" 41 #include "memory/vtBuffer.hpp" 42 #include "oops/constantPool.hpp" 43 #include "oops/instanceKlass.hpp" 44 #include "oops/methodData.hpp" 45 #include "oops/objArrayKlass.hpp" 46 #include "oops/objArrayOop.inline.hpp" 47 #include "oops/oop.inline.hpp" 48 #include "oops/symbol.hpp" 49 #include "oops/valueKlass.hpp" 50 #include "oops/valueArrayKlass.hpp" 51 #include "oops/valueArrayOop.hpp" 52 #include "prims/jvmtiExport.hpp" 53 #include "prims/nativeLookup.hpp" 54 #include "runtime/atomic.hpp" 55 #include "runtime/biasedLocking.hpp" 56 #include "runtime/compilationPolicy.hpp" 57 #include "runtime/deoptimization.hpp" 58 #include "runtime/fieldDescriptor.hpp" 59 #include "runtime/handles.inline.hpp" 60 #include "runtime/icache.hpp" 61 #include "runtime/interfaceSupport.hpp" 62 #include "runtime/java.hpp" 63 #include "runtime/jfieldIDWorkaround.hpp" 64 #include "runtime/osThread.hpp" 65 #include "runtime/sharedRuntime.hpp" 66 #include "runtime/stubRoutines.hpp" 67 #include "runtime/synchronizer.hpp" 68 #include "runtime/threadCritical.hpp" 69 #include "utilities/align.hpp" 70 #include "utilities/events.hpp" 71 #include "utilities/globalDefinitions.hpp" 72 #ifdef COMPILER2 73 #include "opto/runtime.hpp" 74 #endif 75 76 class UnlockFlagSaver { 77 private: 78 JavaThread* _thread; 79 bool _do_not_unlock; 80 public: 81 UnlockFlagSaver(JavaThread* t) { 82 _thread = t; 83 _do_not_unlock = t->do_not_unlock_if_synchronized(); 84 t->set_do_not_unlock_if_synchronized(false); 85 } 86 ~UnlockFlagSaver() { 87 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 88 } 89 }; 90 91 //------------------------------------------------------------------------------------------------------------------------ 92 // State accessors 93 94 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 95 LastFrameAccessor last_frame(thread); 96 last_frame.set_bcp(bcp); 97 if (ProfileInterpreter) { 98 // ProfileTraps uses MDOs independently of ProfileInterpreter. 99 // That is why we must check both ProfileInterpreter and mdo != NULL. 100 MethodData* mdo = last_frame.method()->method_data(); 101 if (mdo != NULL) { 102 NEEDS_CLEANUP; 103 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci())); 104 } 105 } 106 } 107 108 //------------------------------------------------------------------------------------------------------------------------ 109 // Constants 110 111 112 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 113 // access constant pool 114 LastFrameAccessor last_frame(thread); 115 ConstantPool* pool = last_frame.method()->constants(); 116 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc); 117 constantTag tag = pool->tag_at(index); 118 119 assert ((tag.is_unresolved_klass() || tag.is_klass() || 120 tag.is_unresolved_value_type() || tag.is_value_type()), 121 "wrong ldc call"); 122 Klass* klass = pool->klass_at(index, CHECK); 123 oop java_class = klass->java_mirror(); 124 thread->set_vm_result(java_class); 125 IRT_END 126 127 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 128 assert(bytecode == Bytecodes::_ldc || 129 bytecode == Bytecodes::_ldc_w || 130 bytecode == Bytecodes::_ldc2_w || 131 bytecode == Bytecodes::_fast_aldc || 132 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 133 ResourceMark rm(thread); 134 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc || 135 bytecode == Bytecodes::_fast_aldc_w); 136 LastFrameAccessor last_frame(thread); 137 methodHandle m (thread, last_frame.method()); 138 Bytecode_loadconstant ldc(m, last_frame.bci()); 139 140 // Double-check the size. (Condy can have any type.) 141 BasicType type = ldc.result_type(); 142 switch (type2size[type]) { 143 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break; 144 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break; 145 default: ShouldNotReachHere(); 146 } 147 148 // Resolve the constant. This does not do unboxing. 149 // But it does replace Universe::the_null_sentinel by null. 150 oop result = ldc.resolve_constant(CHECK); 151 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc"); 152 153 #ifdef ASSERT 154 { 155 // The bytecode wrappers aren't GC-safe so construct a new one 156 Bytecode_loadconstant ldc2(m, last_frame.bci()); 157 int rindex = ldc2.cache_index(); 158 if (rindex < 0) 159 rindex = m->constants()->cp_to_object_index(ldc2.pool_index()); 160 if (rindex >= 0) { 161 oop coop = m->constants()->resolved_references()->obj_at(rindex); 162 oop roop = (result == NULL ? Universe::the_null_sentinel() : result); 163 assert(roop == coop, "expected result for assembly code"); 164 } 165 } 166 #endif 167 thread->set_vm_result(result); 168 if (!is_fast_aldc) { 169 // Tell the interpreter how to unbox the primitive. 170 guarantee(java_lang_boxing_object::is_instance(result, type), ""); 171 int offset = java_lang_boxing_object::value_offset_in_bytes(type); 172 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift) 173 | (offset & ConstantPoolCacheEntry::field_index_mask)); 174 thread->set_vm_result_2((Metadata*)flags); 175 } 176 } 177 IRT_END 178 179 180 //------------------------------------------------------------------------------------------------------------------------ 181 // Allocation 182 183 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 184 Klass* k = pool->klass_at(index, CHECK); 185 InstanceKlass* klass = InstanceKlass::cast(k); 186 187 // Make sure we are not instantiating an abstract klass 188 klass->check_valid_for_instantiation(true, CHECK); 189 190 // Make sure klass is initialized 191 klass->initialize(CHECK); 192 193 // At this point the class may not be fully initialized 194 // because of recursive initialization. If it is fully 195 // initialized & has_finalized is not set, we rewrite 196 // it into its fast version (Note: no locking is needed 197 // here since this is an atomic byte write and can be 198 // done more than once). 199 // 200 // Note: In case of classes with has_finalized we don't 201 // rewrite since that saves us an extra check in 202 // the fast version which then would call the 203 // slow version anyway (and do a call back into 204 // Java). 205 // If we have a breakpoint, then we don't rewrite 206 // because the _breakpoint bytecode would be lost. 207 oop obj = klass->allocate_instance(CHECK); 208 thread->set_vm_result(obj); 209 IRT_END 210 211 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) { 212 switch (type) { 213 case T_BOOLEAN: 214 instance()->bool_field_put(offset, (jboolean)*((int*)addr)); 215 break; 216 case T_CHAR: 217 instance()->char_field_put(offset, (jchar) *((int*)addr)); 218 break; 219 case T_FLOAT: 220 instance()->float_field_put(offset, (jfloat)*((float*)addr)); 221 break; 222 case T_DOUBLE: 223 instance()->double_field_put(offset, (jdouble)*((double*)addr)); 224 break; 225 case T_BYTE: 226 instance()->byte_field_put(offset, (jbyte)*((int*)addr)); 227 break; 228 case T_SHORT: 229 instance()->short_field_put(offset, (jshort)*((int*)addr)); 230 break; 231 case T_INT: 232 instance()->int_field_put(offset, (jint)*((int*)addr)); 233 break; 234 case T_LONG: 235 instance()->long_field_put(offset, (jlong)*((long long*)addr)); 236 break; 237 case T_OBJECT: 238 case T_ARRAY: 239 case T_VALUETYPE: 240 fatal("Should not be handled with this method"); 241 break; 242 default: 243 fatal("Unsupported BasicType"); 244 } 245 } 246 247 IRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index)) 248 // Getting the ValueKlass 249 Klass* k = pool->klass_at(index, CHECK); 250 assert(k->is_value(), "defaultvalue argument must be the value type class"); 251 ValueKlass* vklass = ValueKlass::cast(k); 252 253 vklass->initialize(THREAD); 254 oop res = vklass->default_value(); 255 thread->set_vm_result(res); 256 IRT_END 257 258 IRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache)) 259 LastFrameAccessor last_frame(thread); 260 // Getting the ValueKlass 261 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield)); 262 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index); 263 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved"); 264 Klass* klass = cp_entry->f1_as_klass(); 265 assert(klass->is_value(), "withfield only applies to value types"); 266 ValueKlass* vklass = ValueKlass::cast(klass); 267 268 // Getting Field information 269 int offset = cp_entry->f2_as_index(); 270 int field_index = cp_entry->field_index(); 271 int field_offset = cp_entry->f2_as_offset(); 272 Symbol* field_signature = vklass->field_signature(field_index); 273 ResourceMark rm(THREAD); 274 const char* signature = (const char *) field_signature->as_utf8(); 275 BasicType field_type = char2type(signature[0]); 276 277 // Getting old value 278 frame& f = last_frame.get_frame(); 279 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1; 280 int vt_offset = type2size[field_type]; 281 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset); 282 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver"); 283 Handle old_value_h(THREAD, old_value); 284 285 // Creating new value by copying the one passed in argument 286 bool in_heap; 287 instanceOop new_value = vklass->allocate_buffered_or_heap_instance(&in_heap, 288 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize)); 289 Handle new_value_h = Handle(THREAD, new_value); 290 int first_offset = vklass->first_field_offset(); 291 vklass->value_store(vklass->data_for_oop(old_value_h()), 292 vklass->data_for_oop(new_value_h()), in_heap, false); 293 294 // Updating the field specified in arguments 295 if (field_type == T_OBJECT || field_type == T_ARRAY) { 296 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 297 assert(aoop == NULL || (oopDesc::is_oop(aoop) && (!aoop->is_value())),"argument must be a reference type"); 298 if (in_heap) { 299 new_value_h()->obj_field_put(field_offset, aoop); 300 } else { 301 new_value_h()->obj_field_put_raw(field_offset, aoop); 302 } 303 } else if (field_type == T_VALUETYPE) { 304 if (cp_entry->is_flattened()) { 305 Klass* field_k = vklass->get_value_field_klass(field_index); 306 ValueKlass* field_vk = ValueKlass::cast(field_k); 307 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 308 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type"); 309 assert(field_vk == vt_oop->klass(), "Must match"); 310 field_vk->value_store(field_vk->data_for_oop(vt_oop), 311 ((char*)(oopDesc*)new_value_h()) + field_offset, in_heap, false); 312 } else { 313 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 314 assert(voop != NULL || (oopDesc::is_oop(voop) && (voop->is_value())),"argument must be a value type"); 315 if (VTBuffer::is_in_vt_buffer(voop)) { 316 // new value field is currently allocated in a TLVB, a heap allocated 317 // copy must be created because a field must never point to a TLVB allocated value 318 Handle voop_h = Handle(THREAD, voop); 319 ValueKlass* field_vk = ValueKlass::cast(voop->klass()); 320 assert(field_vk == vklass->get_value_field_klass(field_index), "Sanity check"); 321 instanceOop field_copy = field_vk->allocate_instance(CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize)); 322 Handle field_copy_h = Handle(THREAD, field_copy); 323 field_vk->value_store(field_vk->data_for_oop(voop_h()), field_vk->data_for_oop(field_copy_h()), true, false); 324 if (in_heap) { 325 new_value_h()->obj_field_put(field_offset, field_copy_h()); 326 } else { 327 new_value_h()->obj_field_put_raw(field_offset, field_copy_h()); 328 } 329 } else { 330 if (in_heap) { 331 new_value_h()->obj_field_put(field_offset, voop); 332 } else { 333 new_value_h()->obj_field_put_raw(field_offset, voop); 334 } 335 } 336 } 337 } else { 338 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx); 339 copy_primitive_argument(addr, new_value_h, field_offset, field_type); 340 } 341 342 // returning result 343 thread->set_vm_result(new_value_h()); 344 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize; 345 IRT_END 346 347 IRT_ENTRY(void, InterpreterRuntime::qgetfield(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder)) 348 Handle value_h(THREAD, obj); 349 InstanceKlass* klass = InstanceKlass::cast(field_holder); 350 351 Klass* field_k = klass->get_value_field_klass(index); 352 ValueKlass* field_vklass = ValueKlass::cast(field_k); 353 field_vklass->initialize(THREAD); 354 355 instanceOop res; 356 bool in_heap; 357 if (klass->field_is_flattened(index)) { 358 // allocate instance 359 res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK); 360 instanceHandle res_h(THREAD, res); 361 // copy value 362 field_vklass->value_store(((char*)(oopDesc*)value_h()) + klass->field_offset(index), 363 field_vklass->data_for_oop(res), in_heap, false); 364 thread->set_vm_result(res_h()); 365 } else { 366 oop res = value_h()->obj_field_acquire(klass->field_offset(index)); 367 if (res == NULL) { 368 res = field_vklass->default_value(); 369 } else { 370 assert(res->klass() == field_k, "Sanity check"); 371 assert(!VTBuffer::is_in_vt_buffer(res), "Sanity check"); 372 } 373 thread->set_vm_result(res); 374 } 375 assert(thread->vm_result()->klass() == field_vklass, "sanity check"); 376 IRT_END 377 378 IRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index)) 379 instanceHandle mirror_h(THREAD, (instanceOop)mirror); 380 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 381 int offset = klass->field_offset(index); 382 Klass* field_k = klass->get_value_field_klass_or_null(index); 383 assert(field_k != NULL, "Must have been initialized"); 384 ValueKlass* field_vklass = ValueKlass::cast(field_k); 385 instanceOop res = (instanceOop)field_vklass->default_value(); 386 thread->set_vm_result(res); 387 IRT_END 388 389 IRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index)) 390 instanceHandle obj_h(THREAD, (instanceOop)obj); 391 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass()); 392 int offset = klass->field_offset(index); 393 Klass* field_k = klass->get_value_field_klass_or_null(index); 394 assert(field_k != NULL, "Must have been initialized"); 395 ValueKlass* field_vklass = ValueKlass::cast(field_k); 396 instanceOop res = (instanceOop)field_vklass->default_value(); 397 thread->set_vm_result(res); 398 IRT_END 399 400 IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, ConstantPoolCache* cp_cache)) 401 LastFrameAccessor last_frame(thread); 402 Handle value_h(THREAD, value); 403 Handle obj_h(THREAD, obj); 404 assert(!obj_h()->klass()->is_value(), "obj must be an object"); 405 assert(value_h()->klass()->is_value(), "value must be an value type"); 406 407 int idx = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_putfield)); 408 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(idx); 409 410 int index = cp_entry->field_index(); 411 bool flatten = cp_entry->is_flattened(); 412 413 InstanceKlass* klass = InstanceKlass::cast(cp_entry->f1_as_klass()); 414 Klass* field_k = klass->get_value_field_klass(index); 415 ValueKlass* field_vklass = ValueKlass::cast(value->klass()); 416 assert(value_h()->klass() == field_k, "Sanity check"); 417 assert(field_k == field_vklass, "Field descriptor and argument must match"); 418 if (flatten) { 419 // copy value 420 field_vklass->value_store(field_vklass->data_for_oop(value_h()), 421 ((char*)(oopDesc*)obj_h()) + klass->field_offset(index), true, false); 422 } else { 423 if (!VTBuffer::is_in_vt_buffer(value_h())) { 424 obj_h()->obj_field_put(klass->field_offset(index), value_h()); 425 } else { 426 // allocate heap instance 427 instanceOop val = field_vklass->allocate_instance(CHECK); 428 instanceHandle res_h(THREAD, val); 429 // copy value 430 field_vklass->value_store(field_vklass->data_for_oop(value_h()), 431 field_vklass->data_for_oop(res_h()), true, false); 432 433 434 obj_h()->obj_field_put(klass->field_offset(index), res_h()); 435 } 436 } 437 IRT_END 438 439 IRT_ENTRY(void, InterpreterRuntime::qputstatic(JavaThread* thread, oopDesc* value, int offset, oopDesc* mirror)) 440 instanceHandle value_h(THREAD, (instanceOop)value); 441 assert(value_h()->is_value(), "qputstatic only deals with value arguments"); 442 if (!VTBuffer::is_in_vt_buffer(value_h())) { 443 mirror->obj_field_put(offset, value_h()); 444 } else { 445 // The argument is a buffered value, a copy must be created in the Java heap 446 // because a static field cannot point to a thread-local buffered value 447 ValueKlass* field_vklass = ValueKlass::cast(value_h()->klass()); 448 Handle mirror_h(THREAD, mirror); 449 // allocate heap instance 450 instanceOop res = field_vklass->allocate_instance(CHECK); 451 assert(Universe::heap()->is_in_reserved(res), "Must be in the Java heap"); 452 instanceHandle res_h(THREAD, res); 453 // copy value 454 field_vklass->value_store(field_vklass->data_for_oop(value_h()), 455 field_vklass->data_for_oop(res), true, false); 456 // writing static field 457 mirror_h->obj_field_put(offset, res_h()); 458 assert(mirror_h->obj_field(offset) != NULL,"Sanity check"); 459 } 460 IRT_END 461 462 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 463 oop obj = oopFactory::new_typeArray(type, size, CHECK); 464 thread->set_vm_result(obj); 465 IRT_END 466 467 468 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 469 Klass* klass = pool->klass_at(index, CHECK); 470 if (klass->is_value()) { // Logically creates elements, ensure klass init 471 klass->initialize(CHECK); 472 } 473 arrayOop obj = oopFactory::new_array(klass, size, CHECK); 474 thread->set_vm_result(obj); 475 IRT_END 476 477 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index)) 478 Klass* klass = array->klass(); 479 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop"); 480 481 if (klass->is_objArray_klass()) { 482 thread->set_vm_result(((objArrayOop) array)->obj_at(index)); 483 } else { 484 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass); 485 ValueKlass* vklass = vaklass->element_klass(); 486 arrayHandle ah(THREAD, array); 487 bool in_heap; 488 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK); 489 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper()); 490 vklass->value_store(src, vklass->data_for_oop(value_holder), 491 vaklass->element_byte_size(), in_heap, false); 492 thread->set_vm_result(value_holder); 493 } 494 IRT_END 495 496 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val)) 497 Klass* klass = array->klass(); 498 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop"); 499 Handle array_h(THREAD, array); 500 501 if (ArrayKlass::cast(klass)->element_klass() != ((oop)val)->klass()) { 502 THROW(vmSymbols::java_lang_ArrayStoreException()); 503 } 504 if (klass->is_objArray_klass()) { 505 if(VTBuffer::is_in_vt_buffer(val)) { 506 // A Java heap allocated copy must be made because an array cannot 507 // reference a thread-local buffered value 508 Handle val_h(THREAD, (oop)val); 509 ObjArrayKlass* aklass = ObjArrayKlass::cast(klass); 510 Klass* eklass = aklass->element_klass(); 511 assert(eklass->is_value(), "Sanity check"); 512 assert(eklass == ((oop)val)->klass(), "Sanity check"); 513 ValueKlass* vklass = ValueKlass::cast(eklass); 514 // allocate heap instance 515 instanceOop res = vklass->allocate_instance(CHECK); 516 Handle res_h(THREAD, res); 517 // copy value 518 vklass->value_store(((char*)(oopDesc*)val_h()) + vklass->first_field_offset(), 519 ((char*)(oopDesc*)res_h()) + vklass->first_field_offset(),true, false); 520 val = res_h(); 521 } 522 ((objArrayOop) array_h())->obj_at_put(index, (oop)val); 523 } else { 524 valueArrayOop varray = (valueArrayOop)array; 525 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass); 526 ValueKlass* vklass = vaklass->element_klass(); 527 const int lh = vaklass->layout_helper(); 528 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh), 529 vaklass->element_byte_size(), true, false); 530 } 531 IRT_END 532 533 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 534 // We may want to pass in more arguments - could make this slightly faster 535 LastFrameAccessor last_frame(thread); 536 ConstantPool* constants = last_frame.method()->constants(); 537 int i = last_frame.get_index_u2(Bytecodes::_multianewarray); 538 Klass* klass = constants->klass_at(i, CHECK); 539 int nof_dims = last_frame.number_of_dimensions(); 540 assert(klass->is_klass(), "not a class"); 541 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 542 543 if (klass->is_value()) { // Logically creates elements, ensure klass init 544 klass->initialize(CHECK); 545 } 546 547 // We must create an array of jints to pass to multi_allocate. 548 ResourceMark rm(thread); 549 const int small_dims = 10; 550 jint dim_array[small_dims]; 551 jint *dims = &dim_array[0]; 552 if (nof_dims > small_dims) { 553 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 554 } 555 for (int index = 0; index < nof_dims; index++) { 556 // offset from first_size_address is addressed as local[index] 557 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 558 dims[index] = first_size_address[n]; 559 } 560 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 561 thread->set_vm_result(obj); 562 IRT_END 563 564 IRT_LEAF(void, InterpreterRuntime::recycle_vtbuffer(void* alloc_ptr)) 565 JavaThread* thread = (JavaThread*)Thread::current(); 566 VTBuffer::recycle_vtbuffer(thread, alloc_ptr); 567 IRT_END 568 569 IRT_ENTRY(void, InterpreterRuntime::recycle_buffered_values(JavaThread* thread)) 570 frame f = thread->last_frame(); 571 assert(f.is_interpreted_frame(), "recycling can only be triggered from interpreted frames"); 572 VTBuffer::recycle_vt_in_frame(thread, &f); 573 IRT_END 574 575 IRT_ENTRY(void, InterpreterRuntime::fix_frame_vt_alloc_ptr(JavaThread* thread)) 576 frame f = thread->last_frame(); 577 VTBuffer::fix_frame_vt_alloc_ptr(f, VTBufferChunk::chunk(thread->vt_alloc_ptr())); 578 IRT_END 579 580 IRT_ENTRY(void, InterpreterRuntime::return_value(JavaThread* thread, oopDesc* obj)) 581 if (!VTBuffer::is_in_vt_buffer(obj)) { 582 thread->set_vm_result(obj); 583 return; 584 } 585 assert(obj->klass()->is_value(), "Sanity check"); 586 ValueKlass* vk = ValueKlass::cast(obj->klass()); 587 RegisterMap reg_map(thread, false); 588 frame current_frame = thread->last_frame(); 589 frame caller_frame = current_frame.sender(®_map); 590 if (!caller_frame.is_interpreted_frame()) { 591 // caller is not an interpreted frame, creating a new value in Java heap 592 Handle obj_h(THREAD, obj); 593 instanceOop res = vk->allocate_instance(CHECK); 594 Handle res_h(THREAD, res); 595 // copy value 596 vk->value_store(vk->data_for_oop(obj_h()), 597 vk->data_for_oop(res_h()), true, false); 598 thread->set_vm_result(res_h()); 599 return; 600 } else { 601 // A buffered value is being returned to an interpreted frame, 602 // but the work has to be delayed to remove_activation() because 603 // the frame cannot be modified now (GC can run at the safepoint 604 // when exiting runtime, and frame layout must be kept consistent 605 // with the OopMap). 606 thread->set_return_buffered_value(obj); 607 thread->set_vm_result(obj); 608 } 609 IRT_END 610 611 IRT_LEAF(void, InterpreterRuntime::return_value_step2(oopDesc* obj, void* alloc_ptr)) 612 613 JavaThread* thread = (JavaThread*)Thread::current(); 614 assert(obj == thread->return_buffered_value(), "Consistency check"); 615 assert(!Universe::heap()->is_in_reserved(obj), "Should only apply to buffered values"); 616 617 oop dest = VTBuffer::relocate_return_value(thread, alloc_ptr, obj); 618 thread->set_return_buffered_value(NULL); 619 thread->set_vm_result(dest); 620 IRT_END 621 622 IRT_ENTRY(void, InterpreterRuntime::check_areturn(JavaThread* thread, oopDesc* obj)) 623 if (obj != NULL) { 624 Klass* k = obj->klass(); 625 if (k->is_value()) { 626 // ResourceMark rm(thread); 627 // tty->print_cr("areturn used on a value from %s", k->name()->as_C_string()); 628 } 629 } 630 thread->set_vm_result(obj); 631 IRT_END 632 633 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 634 assert(oopDesc::is_oop(obj), "must be a valid oop"); 635 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 636 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 637 IRT_END 638 639 640 // Quicken instance-of and check-cast bytecodes 641 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 642 // Force resolving; quicken the bytecode 643 LastFrameAccessor last_frame(thread); 644 int which = last_frame.get_index_u2(Bytecodes::_checkcast); 645 ConstantPool* cpool = last_frame.method()->constants(); 646 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 647 // program we might have seen an unquick'd bytecode in the interpreter but have another 648 // thread quicken the bytecode before we get here. 649 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 650 Klass* klass = cpool->klass_at(which, CHECK); 651 thread->set_vm_result_2(klass); 652 IRT_END 653 654 655 //------------------------------------------------------------------------------------------------------------------------ 656 // Exceptions 657 658 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 659 const methodHandle& trap_method, int trap_bci, TRAPS) { 660 if (trap_method.not_null()) { 661 MethodData* trap_mdo = trap_method->method_data(); 662 if (trap_mdo == NULL) { 663 Method::build_interpreter_method_data(trap_method, THREAD); 664 if (HAS_PENDING_EXCEPTION) { 665 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 666 "we expect only an OOM error here"); 667 CLEAR_PENDING_EXCEPTION; 668 } 669 trap_mdo = trap_method->method_data(); 670 // and fall through... 671 } 672 if (trap_mdo != NULL) { 673 // Update per-method count of trap events. The interpreter 674 // is updating the MDO to simulate the effect of compiler traps. 675 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 676 } 677 } 678 } 679 680 // Assume the compiler is (or will be) interested in this event. 681 // If necessary, create an MDO to hold the information, and record it. 682 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 683 assert(ProfileTraps, "call me only if profiling"); 684 LastFrameAccessor last_frame(thread); 685 methodHandle trap_method(thread, last_frame.method()); 686 int trap_bci = trap_method->bci_from(last_frame.bcp()); 687 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 688 } 689 690 #ifdef CC_INTERP 691 // As legacy note_trap, but we have more arguments. 692 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 693 methodHandle trap_method(method); 694 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 695 IRT_END 696 697 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 698 // for each exception. 699 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 700 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 701 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 702 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 703 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 704 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 705 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 706 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 707 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 708 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 709 #endif // CC_INTERP 710 711 712 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 713 // get klass 714 InstanceKlass* klass = InstanceKlass::cast(k); 715 assert(klass->is_initialized(), 716 "this klass should have been initialized during VM initialization"); 717 // create instance - do not call constructor since we may have no 718 // (java) stack space left (should assert constructor is empty) 719 Handle exception; 720 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 721 exception = Handle(THREAD, exception_oop); 722 if (StackTraceInThrowable) { 723 java_lang_Throwable::fill_in_stack_trace(exception); 724 } 725 return exception; 726 } 727 728 // Special handling for stack overflow: since we don't have any (java) stack 729 // space left we use the pre-allocated & pre-initialized StackOverflowError 730 // klass to create an stack overflow error instance. We do not call its 731 // constructor for the same reason (it is empty, anyway). 732 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 733 Handle exception = get_preinitialized_exception( 734 SystemDictionary::StackOverflowError_klass(), 735 CHECK); 736 // Increment counter for hs_err file reporting 737 Atomic::inc(&Exceptions::_stack_overflow_errors); 738 THROW_HANDLE(exception); 739 IRT_END 740 741 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread)) 742 Handle exception = get_preinitialized_exception( 743 SystemDictionary::StackOverflowError_klass(), 744 CHECK); 745 java_lang_Throwable::set_message(exception(), 746 Universe::delayed_stack_overflow_error_message()); 747 // Increment counter for hs_err file reporting 748 Atomic::inc(&Exceptions::_stack_overflow_errors); 749 THROW_HANDLE(exception); 750 IRT_END 751 752 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 753 // lookup exception klass 754 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 755 if (ProfileTraps) { 756 if (s == vmSymbols::java_lang_ArithmeticException()) { 757 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 758 } else if (s == vmSymbols::java_lang_NullPointerException()) { 759 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 760 } 761 } 762 // create exception 763 Handle exception = Exceptions::new_exception(thread, s, message); 764 thread->set_vm_result(exception()); 765 IRT_END 766 767 768 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 769 ResourceMark rm(thread); 770 const char* klass_name = obj->klass()->external_name(); 771 // lookup exception klass 772 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 773 if (ProfileTraps) { 774 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 775 } 776 // create exception, with klass name as detail message 777 Handle exception = Exceptions::new_exception(thread, s, klass_name); 778 thread->set_vm_result(exception()); 779 IRT_END 780 781 782 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 783 char message[jintAsStringSize]; 784 // lookup exception klass 785 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 786 if (ProfileTraps) { 787 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 788 } 789 // create exception 790 sprintf(message, "%d", index); 791 THROW_MSG(s, message); 792 IRT_END 793 794 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 795 JavaThread* thread, oopDesc* obj)) 796 797 ResourceMark rm(thread); 798 char* message = SharedRuntime::generate_class_cast_message( 799 thread, obj->klass()); 800 801 if (ProfileTraps) { 802 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 803 } 804 805 // create exception 806 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 807 IRT_END 808 809 // exception_handler_for_exception(...) returns the continuation address, 810 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 811 // The exception oop is returned to make sure it is preserved over GC (it 812 // is only on the stack if the exception was thrown explicitly via athrow). 813 // During this operation, the expression stack contains the values for the 814 // bci where the exception happened. If the exception was propagated back 815 // from a call, the expression stack contains the values for the bci at the 816 // invoke w/o arguments (i.e., as if one were inside the call). 817 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 818 819 LastFrameAccessor last_frame(thread); 820 Handle h_exception(thread, exception); 821 methodHandle h_method (thread, last_frame.method()); 822 constantPoolHandle h_constants(thread, h_method->constants()); 823 bool should_repeat; 824 int handler_bci; 825 int current_bci = last_frame.bci(); 826 827 if (thread->frames_to_pop_failed_realloc() > 0) { 828 // Allocation of scalar replaced object used in this frame 829 // failed. Unconditionally pop the frame. 830 thread->dec_frames_to_pop_failed_realloc(); 831 thread->set_vm_result(h_exception()); 832 // If the method is synchronized we already unlocked the monitor 833 // during deoptimization so the interpreter needs to skip it when 834 // the frame is popped. 835 thread->set_do_not_unlock_if_synchronized(true); 836 #ifdef CC_INTERP 837 return (address) -1; 838 #else 839 return Interpreter::remove_activation_entry(); 840 #endif 841 } 842 843 // Need to do this check first since when _do_not_unlock_if_synchronized 844 // is set, we don't want to trigger any classloading which may make calls 845 // into java, or surprisingly find a matching exception handler for bci 0 846 // since at this moment the method hasn't been "officially" entered yet. 847 if (thread->do_not_unlock_if_synchronized()) { 848 ResourceMark rm; 849 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 850 thread->set_vm_result(exception); 851 #ifdef CC_INTERP 852 return (address) -1; 853 #else 854 return Interpreter::remove_activation_entry(); 855 #endif 856 } 857 858 do { 859 should_repeat = false; 860 861 // assertions 862 #ifdef ASSERT 863 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 864 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 865 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 866 if (ExitVMOnVerifyError) vm_exit(-1); 867 ShouldNotReachHere(); 868 } 869 #endif 870 871 // tracing 872 if (log_is_enabled(Info, exceptions)) { 873 ResourceMark rm(thread); 874 stringStream tempst; 875 tempst.print("interpreter method <%s>\n" 876 " at bci %d for thread " INTPTR_FORMAT, 877 h_method->print_value_string(), current_bci, p2i(thread)); 878 Exceptions::log_exception(h_exception, tempst); 879 } 880 // Don't go paging in something which won't be used. 881 // else if (extable->length() == 0) { 882 // // disabled for now - interpreter is not using shortcut yet 883 // // (shortcut is not to call runtime if we have no exception handlers) 884 // // warning("performance bug: should not call runtime if method has no exception handlers"); 885 // } 886 // for AbortVMOnException flag 887 Exceptions::debug_check_abort(h_exception); 888 889 // exception handler lookup 890 Klass* klass = h_exception->klass(); 891 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD); 892 if (HAS_PENDING_EXCEPTION) { 893 // We threw an exception while trying to find the exception handler. 894 // Transfer the new exception to the exception handle which will 895 // be set into thread local storage, and do another lookup for an 896 // exception handler for this exception, this time starting at the 897 // BCI of the exception handler which caused the exception to be 898 // thrown (bug 4307310). 899 h_exception = Handle(THREAD, PENDING_EXCEPTION); 900 CLEAR_PENDING_EXCEPTION; 901 if (handler_bci >= 0) { 902 current_bci = handler_bci; 903 should_repeat = true; 904 } 905 } 906 } while (should_repeat == true); 907 908 #if INCLUDE_JVMCI 909 if (EnableJVMCI && h_method->method_data() != NULL) { 910 ResourceMark rm(thread); 911 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 912 if (pdata != NULL && pdata->is_BitData()) { 913 BitData* bit_data = (BitData*) pdata; 914 bit_data->set_exception_seen(); 915 } 916 } 917 #endif 918 919 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 920 // time throw or a stack unwinding throw and accordingly notify the debugger 921 if (JvmtiExport::can_post_on_exceptions()) { 922 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception()); 923 } 924 925 #ifdef CC_INTERP 926 address continuation = (address)(intptr_t) handler_bci; 927 #else 928 address continuation = NULL; 929 #endif 930 address handler_pc = NULL; 931 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 932 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 933 // handler in this method, or (b) after a stack overflow there is not yet 934 // enough stack space available to reprotect the stack. 935 #ifndef CC_INTERP 936 continuation = Interpreter::remove_activation_entry(); 937 #endif 938 #if COMPILER2_OR_JVMCI 939 // Count this for compilation purposes 940 h_method->interpreter_throwout_increment(THREAD); 941 #endif 942 } else { 943 // handler in this method => change bci/bcp to handler bci/bcp and continue there 944 handler_pc = h_method->code_base() + handler_bci; 945 #ifndef CC_INTERP 946 set_bcp_and_mdp(handler_pc, thread); 947 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 948 #endif 949 } 950 // notify debugger of an exception catch 951 // (this is good for exceptions caught in native methods as well) 952 if (JvmtiExport::can_post_on_exceptions()) { 953 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 954 } 955 956 thread->set_vm_result(h_exception()); 957 return continuation; 958 IRT_END 959 960 961 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 962 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 963 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 964 IRT_END 965 966 967 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 968 THROW(vmSymbols::java_lang_AbstractMethodError()); 969 IRT_END 970 971 972 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 973 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 974 IRT_END 975 976 977 //------------------------------------------------------------------------------------------------------------------------ 978 // Fields 979 // 980 981 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 982 Thread* THREAD = thread; 983 // resolve field 984 fieldDescriptor info; 985 LastFrameAccessor last_frame(thread); 986 constantPoolHandle pool(thread, last_frame.method()->constants()); 987 methodHandle m(thread, last_frame.method()); 988 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 989 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield); 990 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 991 bool is_value = bytecode == Bytecodes::_withfield; 992 993 { 994 JvmtiHideSingleStepping jhss(thread); 995 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode), 996 m, bytecode, CHECK); 997 } // end JvmtiHideSingleStepping 998 999 // check if link resolution caused cpCache to be updated 1000 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1001 if (cp_cache_entry->is_resolved(bytecode)) return; 1002 1003 // compute auxiliary field attributes 1004 TosState state = as_TosState(info.field_type()); 1005 1006 // Resolution of put instructions on final fields is delayed. That is required so that 1007 // exceptions are thrown at the correct place (when the instruction is actually invoked). 1008 // If we do not resolve an instruction in the current pass, leaving the put_code 1009 // set to zero will cause the next put instruction to the same field to reresolve. 1010 1011 // Resolution of put instructions to final instance fields with invalid updates (i.e., 1012 // to final instance fields with updates originating from a method different than <init>) 1013 // is inhibited. A putfield instruction targeting an instance final field must throw 1014 // an IllegalAccessError if the instruction is not in an instance 1015 // initializer method <init>. If resolution were not inhibited, a putfield 1016 // in an initializer method could be resolved in the initializer. Subsequent 1017 // putfield instructions to the same field would then use cached information. 1018 // As a result, those instructions would not pass through the VM. That is, 1019 // checks in resolve_field_access() would not be executed for those instructions 1020 // and the required IllegalAccessError would not be thrown. 1021 // 1022 // Also, we need to delay resolving getstatic and putstatic instructions until the 1023 // class is initialized. This is required so that access to the static 1024 // field will call the initialization function every time until the class 1025 // is completely initialized ala. in 2.17.5 in JVM Specification. 1026 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 1027 bool uninitialized_static = is_static && !klass->is_initialized(); 1028 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 1029 info.has_initialized_final_update(); 1030 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); 1031 1032 Bytecodes::Code get_code = (Bytecodes::Code)0; 1033 Bytecodes::Code put_code = (Bytecodes::Code)0; 1034 if (!uninitialized_static) { 1035 if (is_static) { 1036 get_code = Bytecodes::_getstatic; 1037 } else { 1038 get_code = Bytecodes::_getfield; 1039 } 1040 if (is_put && is_value) { 1041 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield); 1042 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 1043 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 1044 } 1045 } 1046 1047 cp_cache_entry->set_field( 1048 get_code, 1049 put_code, 1050 info.field_holder(), 1051 info.index(), 1052 info.offset(), 1053 state, 1054 info.access_flags().is_final(), 1055 info.access_flags().is_volatile(), 1056 info.is_flattened(), 1057 info.is_flattenable(), 1058 pool->pool_holder() 1059 ); 1060 } 1061 1062 1063 //------------------------------------------------------------------------------------------------------------------------ 1064 // Synchronization 1065 // 1066 // The interpreter's synchronization code is factored out so that it can 1067 // be shared by method invocation and synchronized blocks. 1068 //%note synchronization_3 1069 1070 //%note monitor_1 1071 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 1072 #ifdef ASSERT 1073 thread->last_frame().interpreter_frame_verify_monitor(elem); 1074 #endif 1075 if (PrintBiasedLockingStatistics) { 1076 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 1077 } 1078 Handle h_obj(thread, elem->obj()); 1079 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 1080 "must be NULL or an object"); 1081 if (UseBiasedLocking) { 1082 // Retry fast entry if bias is revoked to avoid unnecessary inflation 1083 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 1084 } else { 1085 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 1086 } 1087 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 1088 "must be NULL or an object"); 1089 #ifdef ASSERT 1090 thread->last_frame().interpreter_frame_verify_monitor(elem); 1091 #endif 1092 IRT_END 1093 1094 1095 //%note monitor_1 1096 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 1097 #ifdef ASSERT 1098 thread->last_frame().interpreter_frame_verify_monitor(elem); 1099 #endif 1100 Handle h_obj(thread, elem->obj()); 1101 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 1102 "must be NULL or an object"); 1103 if (elem == NULL || h_obj()->is_unlocked()) { 1104 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 1105 } 1106 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 1107 // Free entry. This must be done here, since a pending exception might be installed on 1108 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 1109 elem->set_obj(NULL); 1110 #ifdef ASSERT 1111 thread->last_frame().interpreter_frame_verify_monitor(elem); 1112 #endif 1113 IRT_END 1114 1115 1116 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 1117 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 1118 IRT_END 1119 1120 1121 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 1122 // Returns an illegal exception to install into the current thread. The 1123 // pending_exception flag is cleared so normal exception handling does not 1124 // trigger. Any current installed exception will be overwritten. This 1125 // method will be called during an exception unwind. 1126 1127 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 1128 Handle exception(thread, thread->vm_result()); 1129 assert(exception() != NULL, "vm result should be set"); 1130 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 1131 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 1132 exception = get_preinitialized_exception( 1133 SystemDictionary::IllegalMonitorStateException_klass(), 1134 CATCH); 1135 } 1136 thread->set_vm_result(exception()); 1137 IRT_END 1138 1139 1140 //------------------------------------------------------------------------------------------------------------------------ 1141 // Invokes 1142 1143 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 1144 return method->orig_bytecode_at(method->bci_from(bcp)); 1145 IRT_END 1146 1147 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 1148 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 1149 IRT_END 1150 1151 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 1152 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 1153 IRT_END 1154 1155 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 1156 Thread* THREAD = thread; 1157 LastFrameAccessor last_frame(thread); 1158 // extract receiver from the outgoing argument list if necessary 1159 Handle receiver(thread, NULL); 1160 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 1161 bytecode == Bytecodes::_invokespecial) { 1162 ResourceMark rm(thread); 1163 methodHandle m (thread, last_frame.method()); 1164 Bytecode_invoke call(m, last_frame.bci()); 1165 Symbol* signature = call.signature(); 1166 receiver = Handle(thread, last_frame.callee_receiver(signature)); 1167 1168 assert(Universe::heap()->is_in_reserved_or_null(receiver()) 1169 || VTBuffer::is_in_vt_buffer(receiver()), 1170 "sanity check"); 1171 assert(receiver.is_null() || 1172 !Universe::heap()->is_in_reserved(receiver->klass()), 1173 "sanity check"); 1174 } 1175 1176 // resolve method 1177 CallInfo info; 1178 constantPoolHandle pool(thread, last_frame.method()->constants()); 1179 1180 { 1181 JvmtiHideSingleStepping jhss(thread); 1182 LinkResolver::resolve_invoke(info, receiver, pool, 1183 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1184 CHECK); 1185 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 1186 int retry_count = 0; 1187 while (info.resolved_method()->is_old()) { 1188 // It is very unlikely that method is redefined more than 100 times 1189 // in the middle of resolve. If it is looping here more than 100 times 1190 // means then there could be a bug here. 1191 guarantee((retry_count++ < 100), 1192 "Could not resolve to latest version of redefined method"); 1193 // method is redefined in the middle of resolve so re-try. 1194 LinkResolver::resolve_invoke(info, receiver, pool, 1195 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1196 CHECK); 1197 } 1198 } 1199 } // end JvmtiHideSingleStepping 1200 1201 // check if link resolution caused cpCache to be updated 1202 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1203 if (cp_cache_entry->is_resolved(bytecode)) return; 1204 1205 #ifdef ASSERT 1206 if (bytecode == Bytecodes::_invokeinterface) { 1207 if (info.resolved_method()->method_holder() == 1208 SystemDictionary::Object_klass()) { 1209 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 1210 // (see also CallInfo::set_interface for details) 1211 assert(info.call_kind() == CallInfo::vtable_call || 1212 info.call_kind() == CallInfo::direct_call, ""); 1213 methodHandle rm = info.resolved_method(); 1214 assert(rm->is_final() || info.has_vtable_index(), 1215 "should have been set already"); 1216 } else if (!info.resolved_method()->has_itable_index()) { 1217 // Resolved something like CharSequence.toString. Use vtable not itable. 1218 assert(info.call_kind() != CallInfo::itable_call, ""); 1219 } else { 1220 // Setup itable entry 1221 assert(info.call_kind() == CallInfo::itable_call, ""); 1222 int index = info.resolved_method()->itable_index(); 1223 assert(info.itable_index() == index, ""); 1224 } 1225 } else if (bytecode == Bytecodes::_invokespecial) { 1226 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 1227 } else { 1228 assert(info.call_kind() == CallInfo::direct_call || 1229 info.call_kind() == CallInfo::vtable_call, ""); 1230 } 1231 #endif 1232 // Get sender or sender's host_klass, and only set cpCache entry to resolved if 1233 // it is not an interface. The receiver for invokespecial calls within interface 1234 // methods must be checked for every call. 1235 InstanceKlass* sender = pool->pool_holder(); 1236 sender = sender->has_host_klass() ? sender->host_klass() : sender; 1237 1238 switch (info.call_kind()) { 1239 case CallInfo::direct_call: 1240 cp_cache_entry->set_direct_call( 1241 bytecode, 1242 info.resolved_method(), 1243 sender->is_interface()); 1244 break; 1245 case CallInfo::vtable_call: 1246 cp_cache_entry->set_vtable_call( 1247 bytecode, 1248 info.resolved_method(), 1249 info.vtable_index()); 1250 break; 1251 case CallInfo::itable_call: 1252 cp_cache_entry->set_itable_call( 1253 bytecode, 1254 info.resolved_klass(), 1255 info.resolved_method(), 1256 info.itable_index()); 1257 break; 1258 default: ShouldNotReachHere(); 1259 } 1260 } 1261 1262 1263 // First time execution: Resolve symbols, create a permanent MethodType object. 1264 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 1265 Thread* THREAD = thread; 1266 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 1267 LastFrameAccessor last_frame(thread); 1268 1269 // resolve method 1270 CallInfo info; 1271 constantPoolHandle pool(thread, last_frame.method()->constants()); 1272 { 1273 JvmtiHideSingleStepping jhss(thread); 1274 LinkResolver::resolve_invoke(info, Handle(), pool, 1275 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1276 CHECK); 1277 } // end JvmtiHideSingleStepping 1278 1279 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1280 cp_cache_entry->set_method_handle(pool, info); 1281 } 1282 1283 // First time execution: Resolve symbols, create a permanent CallSite object. 1284 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 1285 Thread* THREAD = thread; 1286 LastFrameAccessor last_frame(thread); 1287 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 1288 1289 //TO DO: consider passing BCI to Java. 1290 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp()); 1291 1292 // resolve method 1293 CallInfo info; 1294 constantPoolHandle pool(thread, last_frame.method()->constants()); 1295 int index = last_frame.get_index_u4(bytecode); 1296 { 1297 JvmtiHideSingleStepping jhss(thread); 1298 LinkResolver::resolve_invoke(info, Handle(), pool, 1299 index, bytecode, CHECK); 1300 } // end JvmtiHideSingleStepping 1301 1302 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 1303 cp_cache_entry->set_dynamic_call(pool, info); 1304 } 1305 1306 // This function is the interface to the assembly code. It returns the resolved 1307 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 1308 // This function will check for redefinition! 1309 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 1310 switch (bytecode) { 1311 case Bytecodes::_getstatic: 1312 case Bytecodes::_putstatic: 1313 case Bytecodes::_getfield: 1314 case Bytecodes::_putfield: 1315 case Bytecodes::_withfield: 1316 resolve_get_put(thread, bytecode); 1317 break; 1318 case Bytecodes::_invokevirtual: 1319 case Bytecodes::_invokespecial: 1320 case Bytecodes::_invokestatic: 1321 case Bytecodes::_invokeinterface: 1322 resolve_invoke(thread, bytecode); 1323 break; 1324 case Bytecodes::_invokehandle: 1325 resolve_invokehandle(thread); 1326 break; 1327 case Bytecodes::_invokedynamic: 1328 resolve_invokedynamic(thread); 1329 break; 1330 default: 1331 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 1332 break; 1333 } 1334 } 1335 IRT_END 1336 1337 //------------------------------------------------------------------------------------------------------------------------ 1338 // Miscellaneous 1339 1340 1341 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 1342 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 1343 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 1344 if (branch_bcp != NULL && nm != NULL) { 1345 // This was a successful request for an OSR nmethod. Because 1346 // frequency_counter_overflow_inner ends with a safepoint check, 1347 // nm could have been unloaded so look it up again. It's unsafe 1348 // to examine nm directly since it might have been freed and used 1349 // for something else. 1350 LastFrameAccessor last_frame(thread); 1351 Method* method = last_frame.method(); 1352 int bci = method->bci_from(last_frame.bcp()); 1353 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 1354 } 1355 if (nm != NULL && thread->is_interp_only_mode()) { 1356 // Normally we never get an nm if is_interp_only_mode() is true, because 1357 // policy()->event has a check for this and won't compile the method when 1358 // true. However, it's possible for is_interp_only_mode() to become true 1359 // during the compilation. We don't want to return the nm in that case 1360 // because we want to continue to execute interpreted. 1361 nm = NULL; 1362 } 1363 #ifndef PRODUCT 1364 if (TraceOnStackReplacement) { 1365 if (nm != NULL) { 1366 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 1367 nm->print(); 1368 } 1369 } 1370 #endif 1371 return nm; 1372 } 1373 1374 IRT_ENTRY(nmethod*, 1375 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 1376 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1377 // flag, in case this method triggers classloading which will call into Java. 1378 UnlockFlagSaver fs(thread); 1379 1380 LastFrameAccessor last_frame(thread); 1381 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1382 methodHandle method(thread, last_frame.method()); 1383 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 1384 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci; 1385 1386 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 1387 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 1388 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 1389 1390 if (osr_nm != NULL) { 1391 // We may need to do on-stack replacement which requires that no 1392 // monitors in the activation are biased because their 1393 // BasicObjectLocks will need to migrate during OSR. Force 1394 // unbiasing of all monitors in the activation now (even though 1395 // the OSR nmethod might be invalidated) because we don't have a 1396 // safepoint opportunity later once the migration begins. 1397 if (UseBiasedLocking) { 1398 ResourceMark rm; 1399 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 1400 for( BasicObjectLock *kptr = last_frame.monitor_end(); 1401 kptr < last_frame.monitor_begin(); 1402 kptr = last_frame.next_monitor(kptr) ) { 1403 if( kptr->obj() != NULL ) { 1404 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 1405 } 1406 } 1407 BiasedLocking::revoke(objects_to_revoke); 1408 } 1409 } 1410 return osr_nm; 1411 IRT_END 1412 1413 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 1414 assert(ProfileInterpreter, "must be profiling interpreter"); 1415 int bci = method->bci_from(cur_bcp); 1416 MethodData* mdo = method->method_data(); 1417 if (mdo == NULL) return 0; 1418 return mdo->bci_to_di(bci); 1419 IRT_END 1420 1421 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 1422 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1423 // flag, in case this method triggers classloading which will call into Java. 1424 UnlockFlagSaver fs(thread); 1425 1426 assert(ProfileInterpreter, "must be profiling interpreter"); 1427 LastFrameAccessor last_frame(thread); 1428 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1429 methodHandle method(thread, last_frame.method()); 1430 Method::build_interpreter_method_data(method, THREAD); 1431 if (HAS_PENDING_EXCEPTION) { 1432 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1433 CLEAR_PENDING_EXCEPTION; 1434 // and fall through... 1435 } 1436 IRT_END 1437 1438 1439 #ifdef ASSERT 1440 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 1441 assert(ProfileInterpreter, "must be profiling interpreter"); 1442 1443 MethodData* mdo = method->method_data(); 1444 assert(mdo != NULL, "must not be null"); 1445 1446 int bci = method->bci_from(bcp); 1447 1448 address mdp2 = mdo->bci_to_dp(bci); 1449 if (mdp != mdp2) { 1450 ResourceMark rm; 1451 ResetNoHandleMark rnm; // In a LEAF entry. 1452 HandleMark hm; 1453 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1454 int current_di = mdo->dp_to_di(mdp); 1455 int expected_di = mdo->dp_to_di(mdp2); 1456 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1457 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1458 int approx_bci = -1; 1459 if (current_di >= 0) { 1460 approx_bci = mdo->data_at(current_di)->bci(); 1461 } 1462 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1463 mdo->print_on(tty); 1464 method->print_codes(); 1465 } 1466 assert(mdp == mdp2, "wrong mdp"); 1467 IRT_END 1468 #endif // ASSERT 1469 1470 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1471 assert(ProfileInterpreter, "must be profiling interpreter"); 1472 ResourceMark rm(thread); 1473 HandleMark hm(thread); 1474 LastFrameAccessor last_frame(thread); 1475 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1476 MethodData* h_mdo = last_frame.method()->method_data(); 1477 1478 // Grab a lock to ensure atomic access to setting the return bci and 1479 // the displacement. This can block and GC, invalidating all naked oops. 1480 MutexLocker ml(RetData_lock); 1481 1482 // ProfileData is essentially a wrapper around a derived oop, so we 1483 // need to take the lock before making any ProfileData structures. 1484 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp())); 1485 guarantee(data != NULL, "profile data must be valid"); 1486 RetData* rdata = data->as_RetData(); 1487 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1488 last_frame.set_mdp(new_mdp); 1489 IRT_END 1490 1491 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1492 MethodCounters* mcs = Method::build_method_counters(m, thread); 1493 if (HAS_PENDING_EXCEPTION) { 1494 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1495 CLEAR_PENDING_EXCEPTION; 1496 } 1497 return mcs; 1498 IRT_END 1499 1500 1501 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1502 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1503 // stack traversal automatically takes care of preserving arguments for invoke, so 1504 // this is no longer needed. 1505 1506 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1507 // if this is called during a safepoint 1508 1509 if (JvmtiExport::should_post_single_step()) { 1510 // We are called during regular safepoints and when the VM is 1511 // single stepping. If any thread is marked for single stepping, 1512 // then we may have JVMTI work to do. 1513 LastFrameAccessor last_frame(thread); 1514 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp()); 1515 } 1516 IRT_END 1517 1518 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1519 ConstantPoolCacheEntry *cp_entry)) 1520 1521 // check the access_flags for the field in the klass 1522 1523 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1524 int index = cp_entry->field_index(); 1525 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1526 1527 bool is_static = (obj == NULL); 1528 HandleMark hm(thread); 1529 1530 Handle h_obj; 1531 if (!is_static) { 1532 // non-static field accessors have an object, but we need a handle 1533 h_obj = Handle(thread, obj); 1534 } 1535 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass()); 1536 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static); 1537 LastFrameAccessor last_frame(thread); 1538 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid); 1539 IRT_END 1540 1541 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1542 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1543 1544 Klass* k = cp_entry->f1_as_klass(); 1545 1546 // check the access_flags for the field in the klass 1547 InstanceKlass* ik = InstanceKlass::cast(k); 1548 int index = cp_entry->field_index(); 1549 // bail out if field modifications are not watched 1550 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1551 1552 char sig_type = '\0'; 1553 1554 switch(cp_entry->flag_state()) { 1555 case btos: sig_type = 'B'; break; 1556 case ztos: sig_type = 'Z'; break; 1557 case ctos: sig_type = 'C'; break; 1558 case stos: sig_type = 'S'; break; 1559 case itos: sig_type = 'I'; break; 1560 case ftos: sig_type = 'F'; break; 1561 case atos: sig_type = 'L'; break; 1562 case ltos: sig_type = 'J'; break; 1563 case dtos: sig_type = 'D'; break; 1564 default: ShouldNotReachHere(); return; 1565 } 1566 bool is_static = (obj == NULL); 1567 1568 HandleMark hm(thread); 1569 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static); 1570 jvalue fvalue; 1571 #ifdef _LP64 1572 fvalue = *value; 1573 #else 1574 // Long/double values are stored unaligned and also noncontiguously with 1575 // tagged stacks. We can't just do a simple assignment even in the non- 1576 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1577 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1578 // We assume that the two halves of longs/doubles are stored in interpreter 1579 // stack slots in platform-endian order. 1580 jlong_accessor u; 1581 jint* newval = (jint*)value; 1582 u.words[0] = newval[0]; 1583 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1584 fvalue.j = u.long_value; 1585 #endif // _LP64 1586 1587 Handle h_obj; 1588 if (!is_static) { 1589 // non-static field accessors have an object, but we need a handle 1590 h_obj = Handle(thread, obj); 1591 } 1592 1593 LastFrameAccessor last_frame(thread); 1594 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj, 1595 fid, sig_type, &fvalue); 1596 IRT_END 1597 1598 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1599 LastFrameAccessor last_frame(thread); 1600 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame()); 1601 IRT_END 1602 1603 1604 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1605 LastFrameAccessor last_frame(thread); 1606 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame()); 1607 IRT_END 1608 1609 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1610 { 1611 return (Interpreter::contains(pc) ? 1 : 0); 1612 } 1613 IRT_END 1614 1615 1616 // Implementation of SignatureHandlerLibrary 1617 1618 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1619 // Dummy definition (else normalization method is defined in CPU 1620 // dependant code) 1621 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1622 return fingerprint; 1623 } 1624 #endif 1625 1626 address SignatureHandlerLibrary::set_handler_blob() { 1627 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1628 if (handler_blob == NULL) { 1629 return NULL; 1630 } 1631 address handler = handler_blob->code_begin(); 1632 _handler_blob = handler_blob; 1633 _handler = handler; 1634 return handler; 1635 } 1636 1637 void SignatureHandlerLibrary::initialize() { 1638 if (_fingerprints != NULL) { 1639 return; 1640 } 1641 if (set_handler_blob() == NULL) { 1642 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1643 } 1644 1645 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1646 SignatureHandlerLibrary::buffer_size); 1647 _buffer = bb->code_begin(); 1648 1649 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1650 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1651 } 1652 1653 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1654 address handler = _handler; 1655 int insts_size = buffer->pure_insts_size(); 1656 if (handler + insts_size > _handler_blob->code_end()) { 1657 // get a new handler blob 1658 handler = set_handler_blob(); 1659 } 1660 if (handler != NULL) { 1661 memcpy(handler, buffer->insts_begin(), insts_size); 1662 pd_set_handler(handler); 1663 ICache::invalidate_range(handler, insts_size); 1664 _handler = handler + insts_size; 1665 } 1666 return handler; 1667 } 1668 1669 void SignatureHandlerLibrary::add(const methodHandle& method) { 1670 if (method->signature_handler() == NULL) { 1671 // use slow signature handler if we can't do better 1672 int handler_index = -1; 1673 // check if we can use customized (fast) signature handler 1674 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1675 // use customized signature handler 1676 MutexLocker mu(SignatureHandlerLibrary_lock); 1677 // make sure data structure is initialized 1678 initialize(); 1679 // lookup method signature's fingerprint 1680 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1681 // allow CPU dependant code to optimize the fingerprints for the fast handler 1682 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1683 handler_index = _fingerprints->find(fingerprint); 1684 // create handler if necessary 1685 if (handler_index < 0) { 1686 ResourceMark rm; 1687 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer; 1688 CodeBuffer buffer((address)(_buffer + align_offset), 1689 SignatureHandlerLibrary::buffer_size - align_offset); 1690 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1691 // copy into code heap 1692 address handler = set_handler(&buffer); 1693 if (handler == NULL) { 1694 // use slow signature handler (without memorizing it in the fingerprints) 1695 } else { 1696 // debugging suppport 1697 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1698 ttyLocker ttyl; 1699 tty->cr(); 1700 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1701 _handlers->length(), 1702 (method->is_static() ? "static" : "receiver"), 1703 method->name_and_sig_as_C_string(), 1704 fingerprint, 1705 buffer.insts_size()); 1706 if (buffer.insts_size() > 0) { 1707 Disassembler::decode(handler, handler + buffer.insts_size()); 1708 } 1709 #ifndef PRODUCT 1710 address rh_begin = Interpreter::result_handler(method()->result_type()); 1711 if (CodeCache::contains(rh_begin)) { 1712 // else it might be special platform dependent values 1713 tty->print_cr(" --- associated result handler ---"); 1714 address rh_end = rh_begin; 1715 while (*(int*)rh_end != 0) { 1716 rh_end += sizeof(int); 1717 } 1718 Disassembler::decode(rh_begin, rh_end); 1719 } else { 1720 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1721 } 1722 #endif 1723 } 1724 // add handler to library 1725 _fingerprints->append(fingerprint); 1726 _handlers->append(handler); 1727 // set handler index 1728 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1729 handler_index = _fingerprints->length() - 1; 1730 } 1731 } 1732 // Set handler under SignatureHandlerLibrary_lock 1733 if (handler_index < 0) { 1734 // use generic signature handler 1735 method->set_signature_handler(Interpreter::slow_signature_handler()); 1736 } else { 1737 // set handler 1738 method->set_signature_handler(_handlers->at(handler_index)); 1739 } 1740 } else { 1741 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1742 // use generic signature handler 1743 method->set_signature_handler(Interpreter::slow_signature_handler()); 1744 } 1745 } 1746 #ifdef ASSERT 1747 int handler_index = -1; 1748 int fingerprint_index = -2; 1749 { 1750 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1751 // in any way if accessed from multiple threads. To avoid races with another 1752 // thread which may change the arrays in the above, mutex protected block, we 1753 // have to protect this read access here with the same mutex as well! 1754 MutexLocker mu(SignatureHandlerLibrary_lock); 1755 if (_handlers != NULL) { 1756 handler_index = _handlers->find(method->signature_handler()); 1757 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1758 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1759 fingerprint_index = _fingerprints->find(fingerprint); 1760 } 1761 } 1762 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1763 handler_index == fingerprint_index, "sanity check"); 1764 #endif // ASSERT 1765 } 1766 1767 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1768 int handler_index = -1; 1769 // use customized signature handler 1770 MutexLocker mu(SignatureHandlerLibrary_lock); 1771 // make sure data structure is initialized 1772 initialize(); 1773 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1774 handler_index = _fingerprints->find(fingerprint); 1775 // create handler if necessary 1776 if (handler_index < 0) { 1777 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1778 tty->cr(); 1779 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1780 _handlers->length(), 1781 p2i(handler), 1782 fingerprint); 1783 } 1784 _fingerprints->append(fingerprint); 1785 _handlers->append(handler); 1786 } else { 1787 if (PrintSignatureHandlers) { 1788 tty->cr(); 1789 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1790 _handlers->length(), 1791 fingerprint, 1792 p2i(_handlers->at(handler_index)), 1793 p2i(handler)); 1794 } 1795 } 1796 } 1797 1798 1799 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1800 address SignatureHandlerLibrary::_handler = NULL; 1801 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1802 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1803 address SignatureHandlerLibrary::_buffer = NULL; 1804 1805 1806 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1807 methodHandle m(thread, method); 1808 assert(m->is_native(), "sanity check"); 1809 // lookup native function entry point if it doesn't exist 1810 bool in_base_library; 1811 if (!m->has_native_function()) { 1812 NativeLookup::lookup(m, in_base_library, CHECK); 1813 } 1814 // make sure signature handler is installed 1815 SignatureHandlerLibrary::add(m); 1816 // The interpreter entry point checks the signature handler first, 1817 // before trying to fetch the native entry point and klass mirror. 1818 // We must set the signature handler last, so that multiple processors 1819 // preparing the same method will be sure to see non-null entry & mirror. 1820 IRT_END 1821 1822 #if defined(IA32) || defined(AMD64) || defined(ARM) 1823 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1824 if (src_address == dest_address) { 1825 return; 1826 } 1827 ResetNoHandleMark rnm; // In a LEAF entry. 1828 HandleMark hm; 1829 ResourceMark rm; 1830 LastFrameAccessor last_frame(thread); 1831 assert(last_frame.is_interpreted_frame(), ""); 1832 jint bci = last_frame.bci(); 1833 methodHandle mh(thread, last_frame.method()); 1834 Bytecode_invoke invoke(mh, bci); 1835 ArgumentSizeComputer asc(invoke.signature()); 1836 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1837 Copy::conjoint_jbytes(src_address, dest_address, 1838 size_of_arguments * Interpreter::stackElementSize); 1839 IRT_END 1840 #endif 1841 1842 #if INCLUDE_JVMTI 1843 // This is a support of the JVMTI PopFrame interface. 1844 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1845 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1846 // The member_name argument is a saved reference (in local#0) to the member_name. 1847 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1848 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1849 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1850 Method* method, address bcp)) 1851 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1852 if (code != Bytecodes::_invokestatic) { 1853 return; 1854 } 1855 ConstantPool* cpool = method->constants(); 1856 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1857 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1858 Symbol* mname = cpool->name_ref_at(cp_index); 1859 1860 if (MethodHandles::has_member_arg(cname, mname)) { 1861 oop member_name_oop = (oop) member_name; 1862 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1863 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1864 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1865 } 1866 thread->set_vm_result(member_name_oop); 1867 } else { 1868 thread->set_vm_result(NULL); 1869 } 1870 IRT_END 1871 #endif // INCLUDE_JVMTI 1872 1873 #ifndef PRODUCT 1874 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to 1875 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1876 // The generated code still uses call_VM because that will set up the frame pointer for 1877 // bcp and method. 1878 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1879 LastFrameAccessor last_frame(thread); 1880 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame"); 1881 methodHandle mh(thread, last_frame.method()); 1882 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2); 1883 return preserve_this_value; 1884 IRT_END 1885 #endif // !PRODUCT