1 /* 2 * Copyright (c) 1997, 2018, 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.hpp" 41 #include "memory/vtBuffer.hpp" 42 #include "oops/constantPool.hpp" 43 #include "oops/cpCache.inline.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/methodData.hpp" 46 #include "oops/objArrayKlass.hpp" 47 #include "oops/objArrayOop.inline.hpp" 48 #include "oops/oop.inline.hpp" 49 #include "oops/symbol.hpp" 50 #include "oops/valueKlass.hpp" 51 #include "oops/valueArrayKlass.hpp" 52 #include "oops/valueArrayOop.hpp" 53 #include "oops/valueArrayOop.inline.hpp" 54 #include "prims/jvmtiExport.hpp" 55 #include "prims/nativeLookup.hpp" 56 #include "runtime/atomic.hpp" 57 #include "runtime/biasedLocking.hpp" 58 #include "runtime/compilationPolicy.hpp" 59 #include "runtime/deoptimization.hpp" 60 #include "runtime/fieldDescriptor.inline.hpp" 61 #include "runtime/frame.inline.hpp" 62 #include "runtime/handles.inline.hpp" 63 #include "runtime/icache.hpp" 64 #include "runtime/interfaceSupport.inline.hpp" 65 #include "runtime/java.hpp" 66 #include "runtime/javaCalls.hpp" 67 #include "runtime/jfieldIDWorkaround.hpp" 68 #include "runtime/osThread.hpp" 69 #include "runtime/sharedRuntime.hpp" 70 #include "runtime/stubRoutines.hpp" 71 #include "runtime/synchronizer.hpp" 72 #include "runtime/threadCritical.hpp" 73 #include "utilities/align.hpp" 74 #include "utilities/copy.hpp" 75 #include "utilities/events.hpp" 76 #include "utilities/globalDefinitions.hpp" 77 #ifdef COMPILER2 78 #include "opto/runtime.hpp" 79 #endif 80 81 class UnlockFlagSaver { 82 private: 83 JavaThread* _thread; 84 bool _do_not_unlock; 85 public: 86 UnlockFlagSaver(JavaThread* t) { 87 _thread = t; 88 _do_not_unlock = t->do_not_unlock_if_synchronized(); 89 t->set_do_not_unlock_if_synchronized(false); 90 } 91 ~UnlockFlagSaver() { 92 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 93 } 94 }; 95 96 // Helper class to access current interpreter state 97 class LastFrameAccessor : public StackObj { 98 frame _last_frame; 99 public: 100 LastFrameAccessor(JavaThread* thread) { 101 assert(thread == Thread::current(), "sanity"); 102 _last_frame = thread->last_frame(); 103 } 104 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); } 105 Method* method() const { return _last_frame.interpreter_frame_method(); } 106 address bcp() const { return _last_frame.interpreter_frame_bcp(); } 107 int bci() const { return _last_frame.interpreter_frame_bci(); } 108 address mdp() const { return _last_frame.interpreter_frame_mdp(); } 109 110 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); } 111 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); } 112 113 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272) 114 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); } 115 116 Bytecode bytecode() const { return Bytecode(method(), bcp()); } 117 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); } 118 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); } 119 int get_index_u2_cpcache(Bytecodes::Code bc) const 120 { return bytecode().get_index_u2_cpcache(bc); } 121 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); } 122 int number_of_dimensions() const { return bcp()[3]; } 123 ConstantPoolCacheEntry* cache_entry_at(int i) const 124 { return method()->constants()->cache()->entry_at(i); } 125 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); } 126 127 oop callee_receiver(Symbol* signature) { 128 return _last_frame.interpreter_callee_receiver(signature); 129 } 130 BasicObjectLock* monitor_begin() const { 131 return _last_frame.interpreter_frame_monitor_begin(); 132 } 133 BasicObjectLock* monitor_end() const { 134 return _last_frame.interpreter_frame_monitor_end(); 135 } 136 BasicObjectLock* next_monitor(BasicObjectLock* current) const { 137 return _last_frame.next_monitor_in_interpreter_frame(current); 138 } 139 140 frame& get_frame() { return _last_frame; } 141 }; 142 143 144 bool InterpreterRuntime::is_breakpoint(JavaThread *thread) { 145 return Bytecodes::code_or_bp_at(LastFrameAccessor(thread).bcp()) == Bytecodes::_breakpoint; 146 } 147 148 //------------------------------------------------------------------------------------------------------------------------ 149 // State accessors 150 151 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 152 LastFrameAccessor last_frame(thread); 153 last_frame.set_bcp(bcp); 154 if (ProfileInterpreter) { 155 // ProfileTraps uses MDOs independently of ProfileInterpreter. 156 // That is why we must check both ProfileInterpreter and mdo != NULL. 157 MethodData* mdo = last_frame.method()->method_data(); 158 if (mdo != NULL) { 159 NEEDS_CLEANUP; 160 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci())); 161 } 162 } 163 } 164 165 //------------------------------------------------------------------------------------------------------------------------ 166 // Constants 167 168 169 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 170 // access constant pool 171 LastFrameAccessor last_frame(thread); 172 ConstantPool* pool = last_frame.method()->constants(); 173 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc); 174 constantTag tag = pool->tag_at(index); 175 176 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 177 Klass* klass = pool->klass_at(index, CHECK); 178 oop java_class = klass->java_mirror(); 179 thread->set_vm_result(java_class); 180 IRT_END 181 182 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 183 assert(bytecode == Bytecodes::_ldc || 184 bytecode == Bytecodes::_ldc_w || 185 bytecode == Bytecodes::_ldc2_w || 186 bytecode == Bytecodes::_fast_aldc || 187 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 188 ResourceMark rm(thread); 189 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc || 190 bytecode == Bytecodes::_fast_aldc_w); 191 LastFrameAccessor last_frame(thread); 192 methodHandle m (thread, last_frame.method()); 193 Bytecode_loadconstant ldc(m, last_frame.bci()); 194 195 // Double-check the size. (Condy can have any type.) 196 BasicType type = ldc.result_type(); 197 switch (type2size[type]) { 198 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break; 199 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break; 200 default: ShouldNotReachHere(); 201 } 202 203 // Resolve the constant. This does not do unboxing. 204 // But it does replace Universe::the_null_sentinel by null. 205 oop result = ldc.resolve_constant(CHECK); 206 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc"); 207 208 #ifdef ASSERT 209 { 210 // The bytecode wrappers aren't GC-safe so construct a new one 211 Bytecode_loadconstant ldc2(m, last_frame.bci()); 212 int rindex = ldc2.cache_index(); 213 if (rindex < 0) 214 rindex = m->constants()->cp_to_object_index(ldc2.pool_index()); 215 if (rindex >= 0) { 216 oop coop = m->constants()->resolved_references()->obj_at(rindex); 217 oop roop = (result == NULL ? Universe::the_null_sentinel() : result); 218 assert(oopDesc::equals(roop, coop), "expected result for assembly code"); 219 } 220 } 221 #endif 222 thread->set_vm_result(result); 223 if (!is_fast_aldc) { 224 // Tell the interpreter how to unbox the primitive. 225 guarantee(java_lang_boxing_object::is_instance(result, type), ""); 226 int offset = java_lang_boxing_object::value_offset_in_bytes(type); 227 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift) 228 | (offset & ConstantPoolCacheEntry::field_index_mask)); 229 thread->set_vm_result_2((Metadata*)flags); 230 } 231 } 232 IRT_END 233 234 235 //------------------------------------------------------------------------------------------------------------------------ 236 // Allocation 237 238 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 239 Klass* k = pool->klass_at(index, CHECK); 240 InstanceKlass* klass = InstanceKlass::cast(k); 241 242 // Make sure we are not instantiating an abstract klass 243 klass->check_valid_for_instantiation(true, CHECK); 244 245 // Make sure klass is initialized 246 klass->initialize(CHECK); 247 248 // At this point the class may not be fully initialized 249 // because of recursive initialization. If it is fully 250 // initialized & has_finalized is not set, we rewrite 251 // it into its fast version (Note: no locking is needed 252 // here since this is an atomic byte write and can be 253 // done more than once). 254 // 255 // Note: In case of classes with has_finalized we don't 256 // rewrite since that saves us an extra check in 257 // the fast version which then would call the 258 // slow version anyway (and do a call back into 259 // Java). 260 // If we have a breakpoint, then we don't rewrite 261 // because the _breakpoint bytecode would be lost. 262 oop obj = klass->allocate_instance(CHECK); 263 thread->set_vm_result(obj); 264 IRT_END 265 266 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) { 267 switch (type) { 268 case T_BOOLEAN: 269 instance()->bool_field_put(offset, (jboolean)*((int*)addr)); 270 break; 271 case T_CHAR: 272 instance()->char_field_put(offset, (jchar) *((int*)addr)); 273 break; 274 case T_FLOAT: 275 instance()->float_field_put(offset, (jfloat)*((float*)addr)); 276 break; 277 case T_DOUBLE: 278 instance()->double_field_put(offset, (jdouble)*((double*)addr)); 279 break; 280 case T_BYTE: 281 instance()->byte_field_put(offset, (jbyte)*((int*)addr)); 282 break; 283 case T_SHORT: 284 instance()->short_field_put(offset, (jshort)*((int*)addr)); 285 break; 286 case T_INT: 287 instance()->int_field_put(offset, (jint)*((int*)addr)); 288 break; 289 case T_LONG: 290 instance()->long_field_put(offset, (jlong)*((long long*)addr)); 291 break; 292 case T_OBJECT: 293 case T_ARRAY: 294 fatal("Should not be handled with this method"); 295 break; 296 default: 297 fatal("Unsupported BasicType"); 298 } 299 } 300 301 IRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index)) 302 // Getting the ValueKlass 303 Klass* k = pool->klass_at(index, CHECK); 304 assert(k->is_value(), "defaultvalue argument must be the value type class"); 305 ValueKlass* vklass = ValueKlass::cast(k); 306 307 vklass->initialize(THREAD); 308 oop res = vklass->default_value(); 309 thread->set_vm_result(res); 310 IRT_END 311 312 IRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache)) 313 LastFrameAccessor last_frame(thread); 314 // Getting the ValueKlass 315 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield)); 316 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index); 317 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved"); 318 Klass* klass = cp_entry->f1_as_klass(); 319 assert(klass->is_value(), "withfield only applies to value types"); 320 ValueKlass* vklass = ValueKlass::cast(klass); 321 322 // Getting Field information 323 int offset = cp_entry->f2_as_index(); 324 int field_index = cp_entry->field_index(); 325 int field_offset = cp_entry->f2_as_offset(); 326 Symbol* field_signature = vklass->field_signature(field_index); 327 ResourceMark rm(THREAD); 328 const char* signature = (const char *) field_signature->as_utf8(); 329 BasicType field_type = char2type(signature[0]); 330 331 // Getting old value 332 frame& f = last_frame.get_frame(); 333 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1; 334 int vt_offset = type2size[field_type]; 335 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset); 336 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver"); 337 Handle old_value_h(THREAD, old_value); 338 339 // Creating new value by copying the one passed in argument 340 bool in_heap; 341 instanceOop new_value = vklass->allocate_buffered_or_heap_instance(&in_heap, 342 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize)); 343 Handle new_value_h = Handle(THREAD, new_value); 344 int first_offset = vklass->first_field_offset(); 345 vklass->value_store(vklass->data_for_oop(old_value_h()), 346 vklass->data_for_oop(new_value_h()), in_heap, false); 347 348 // Updating the field specified in arguments 349 if (field_type == T_ARRAY) { 350 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 351 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type"); 352 if (in_heap) { 353 new_value_h()->obj_field_put(field_offset, aoop); 354 } else { 355 new_value_h()->obj_field_put_raw(field_offset, aoop); 356 } 357 } else if (field_type == T_OBJECT) { 358 if (cp_entry->is_flattened()) { 359 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 360 if (vt_oop == NULL) { 361 THROW_(vmSymbols::java_lang_NullPointerException(), 362 (type2size[field_type] * AbstractInterpreter::stackElementSize)); 363 } 364 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type"); 365 Klass* field_k = vklass->get_value_field_klass(field_index); 366 ValueKlass* field_vk = ValueKlass::cast(field_k); 367 assert(field_vk == vt_oop->klass(), "Must match"); 368 field_vk->value_store(field_vk->data_for_oop(vt_oop), 369 ((char*)(oopDesc*)new_value_h()) + field_offset, in_heap, false); 370 } else { // not flattened 371 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 372 if (voop == NULL && cp_entry->is_flattenable()) { 373 THROW_(vmSymbols::java_lang_NullPointerException(), 374 (type2size[field_type] * AbstractInterpreter::stackElementSize)); 375 } 376 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument"); 377 if (VTBuffer::is_in_vt_buffer(voop)) { 378 // new value field is currently allocated in a TLVB, a heap allocated 379 // copy must be created because a field must never point to a TLVB allocated value 380 Handle voop_h = Handle(THREAD, voop); 381 ValueKlass* field_vk = ValueKlass::cast(voop->klass()); 382 assert(!cp_entry->is_flattenable() || field_vk == vklass->get_value_field_klass(field_index), "Sanity check"); 383 instanceOop field_copy = field_vk->allocate_instance(CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize)); 384 Handle field_copy_h = Handle(THREAD, field_copy); 385 field_vk->value_store(field_vk->data_for_oop(voop_h()), field_vk->data_for_oop(field_copy_h()), true, false); 386 if (in_heap) { 387 new_value_h()->obj_field_put(field_offset, field_copy_h()); 388 } else { 389 new_value_h()->obj_field_put_raw(field_offset, field_copy_h()); 390 } 391 } else { // not buffered 392 if (in_heap) { 393 new_value_h()->obj_field_put(field_offset, voop); 394 } else { 395 new_value_h()->obj_field_put_raw(field_offset, voop); 396 } 397 } 398 } 399 } else { // not T_OBJECT nor T_ARRAY 400 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx); 401 copy_primitive_argument(addr, new_value_h, field_offset, field_type); 402 } 403 404 // returning result 405 thread->set_vm_result(new_value_h()); 406 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize; 407 IRT_END 408 409 IRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index)) 410 instanceHandle mirror_h(THREAD, (instanceOop)mirror); 411 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 412 int offset = klass->field_offset(index); 413 Klass* field_k = klass->get_value_field_klass_or_null(index); 414 assert(field_k != NULL, "Must have been initialized"); 415 ValueKlass* field_vklass = ValueKlass::cast(field_k); 416 instanceOop res = (instanceOop)field_vklass->default_value(); 417 thread->set_vm_result(res); 418 IRT_END 419 420 IRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index)) 421 instanceHandle obj_h(THREAD, (instanceOop)obj); 422 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass()); 423 Klass* field_k = klass->get_value_field_klass_or_null(index); 424 assert(field_k != NULL, "Must have been initialized"); 425 ValueKlass* field_vklass = ValueKlass::cast(field_k); 426 assert(field_vklass->is_initialized(), "Must have been initialized at this point"); 427 instanceOop res = (instanceOop)field_vklass->default_value(); 428 thread->set_vm_result(res); 429 IRT_END 430 431 IRT_ENTRY(void, InterpreterRuntime::write_heap_copy(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv)) 432 assert(oopDesc::is_oop(value), "Sanity check"); 433 assert(oopDesc::is_oop(rcv) ,"Sanity check"); 434 assert(value->is_value(), "Sanity check"); 435 assert(rcv->is_instance(), "Sanity check"); 436 assert(VTBuffer::is_in_vt_buffer(value), "Should only be called for buffered values"); 437 438 ValueKlass* vk = ValueKlass::cast(value->klass()); 439 Handle val_h(THREAD, value); 440 Handle rcv_h(THREAD, rcv); 441 instanceOop res = vk->allocate_instance(CHECK); 442 // copy value 443 vk->value_store(vk->data_for_oop(val_h()), 444 vk->data_for_oop(res), true, false); 445 ((instanceOop)rcv_h())->obj_field_put(offset, res); 446 IRT_END 447 448 IRT_ENTRY(void, InterpreterRuntime::write_flattened_value(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv)) 449 assert(oopDesc::is_oop(value), "Sanity check"); 450 assert(oopDesc::is_oop(rcv), "Sanity check"); 451 assert(value->is_value(), "Sanity check"); 452 453 ValueKlass* vklass = ValueKlass::cast(value->klass()); 454 vklass->value_store(vklass->data_for_oop(value), ((char*)(oopDesc*)rcv) + offset, true, true); 455 IRT_END 456 457 IRT_ENTRY(void, InterpreterRuntime::read_flattened_field(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder)) 458 Handle obj_h(THREAD, obj); 459 460 assert(oopDesc::is_oop(obj), "Sanity check"); 461 462 assert(field_holder->is_instance_klass(), "Sanity check"); 463 InstanceKlass* klass = InstanceKlass::cast(field_holder); 464 465 assert(klass->field_is_flattened(index), "Sanity check"); 466 467 ValueKlass* field_vklass = ValueKlass::cast(klass->get_value_field_klass(index)); 468 assert(field_vklass->is_initialized(), "Must be initialized at this point"); 469 470 bool in_heap; 471 // allocate instance 472 instanceOop res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK); 473 // copy value 474 field_vklass->value_store(((char*)(oopDesc*)obj_h()) + klass->field_offset(index), 475 field_vklass->data_for_oop(res), in_heap, true); 476 thread->set_vm_result(res); 477 IRT_END 478 479 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 480 oop obj = oopFactory::new_typeArray(type, size, CHECK); 481 thread->set_vm_result(obj); 482 IRT_END 483 484 485 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 486 Klass* klass = pool->klass_at(index, CHECK); 487 if (klass->is_value()) { // Logically creates elements, ensure klass init 488 klass->initialize(CHECK); 489 } 490 arrayOop obj = oopFactory::new_array(klass, size, CHECK); 491 thread->set_vm_result(obj); 492 IRT_END 493 494 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index)) 495 Klass* klass = array->klass(); 496 assert(klass->is_valueArray_klass(), "expected value array oop"); 497 498 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass); 499 ValueKlass* vklass = vaklass->element_klass(); 500 arrayHandle ah(THREAD, array); 501 bool in_heap; 502 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK); 503 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper()); 504 vklass->value_store(src, vklass->data_for_oop(value_holder), 505 vaklass->element_byte_size(), in_heap, false); 506 thread->set_vm_result(value_holder); 507 IRT_END 508 509 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, void* val, arrayOopDesc* array, int index)) 510 assert(val != NULL, "can't store null into flat array"); 511 Klass* klass = array->klass(); 512 assert(klass->is_valueArray_klass(), "expected value array"); 513 assert(ArrayKlass::cast(klass)->element_klass() == ((oop)val)->klass(), "Store type incorrect"); 514 515 valueArrayOop varray = (valueArrayOop)array; 516 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass); 517 ValueKlass* vklass = vaklass->element_klass(); 518 const int lh = vaklass->layout_helper(); 519 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh), 520 vaklass->element_byte_size(), true, false); 521 IRT_END 522 523 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 524 // We may want to pass in more arguments - could make this slightly faster 525 LastFrameAccessor last_frame(thread); 526 ConstantPool* constants = last_frame.method()->constants(); 527 int i = last_frame.get_index_u2(Bytecodes::_multianewarray); 528 Klass* klass = constants->klass_at(i, CHECK); 529 int nof_dims = last_frame.number_of_dimensions(); 530 assert(klass->is_klass(), "not a class"); 531 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 532 533 if (klass->is_value()) { // Logically creates elements, ensure klass init 534 klass->initialize(CHECK); 535 } 536 537 // We must create an array of jints to pass to multi_allocate. 538 ResourceMark rm(thread); 539 const int small_dims = 10; 540 jint dim_array[small_dims]; 541 jint *dims = &dim_array[0]; 542 if (nof_dims > small_dims) { 543 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 544 } 545 for (int index = 0; index < nof_dims; index++) { 546 // offset from first_size_address is addressed as local[index] 547 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 548 dims[index] = first_size_address[n]; 549 } 550 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 551 thread->set_vm_result(obj); 552 IRT_END 553 554 IRT_ENTRY(void, InterpreterRuntime::value_heap_copy(JavaThread* thread, oopDesc* value)) 555 assert(VTBuffer::is_in_vt_buffer(value), "Must only be called for buffered values"); 556 ValueKlass* vk = ValueKlass::cast(value->klass()); 557 Handle val_h(THREAD, value); 558 instanceOop obj = vk->allocate_instance(CHECK); 559 Handle obj_h(THREAD, obj); 560 vk->value_store(vk->data_for_oop(val_h()), vk->data_for_oop(obj_h()), true, false); 561 thread->set_vm_result(obj_h()); 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 assert(VTBuffer::is_in_vt_buffer(obj), "Must only be called for buffered values"); 582 assert(obj->klass()->is_value(), "Sanity check"); 583 ValueKlass* vk = ValueKlass::cast(obj->klass()); 584 RegisterMap reg_map(thread, false); 585 frame current_frame = thread->last_frame(); 586 frame caller_frame = current_frame.sender(®_map); 587 if (!caller_frame.is_interpreted_frame()) { 588 // caller is not an interpreted frame, creating a new value in Java heap 589 Handle obj_h(THREAD, obj); 590 instanceOop res = vk->allocate_instance(CHECK); 591 Handle res_h(THREAD, res); 592 // copy value 593 vk->value_store(vk->data_for_oop(obj_h()), 594 vk->data_for_oop(res_h()), true, false); 595 thread->set_vm_result(res_h()); 596 return; 597 } else { 598 // A buffered value is being returned to an interpreted frame, 599 // but the work has to be delayed to remove_activation() because 600 // the frame cannot be modified now (GC can run at the safepoint 601 // when exiting runtime, and frame layout must be kept consistent 602 // with the OopMap). 603 thread->set_return_buffered_value(obj); 604 thread->set_vm_result(obj); 605 } 606 IRT_END 607 608 IRT_LEAF(void, InterpreterRuntime::return_value_step2(oopDesc* obj, void* alloc_ptr)) 609 610 JavaThread* thread = (JavaThread*)Thread::current(); 611 assert(obj == thread->return_buffered_value(), "Consistency check"); 612 assert(!Universe::heap()->is_in_reserved(obj), "Should only apply to buffered values"); 613 614 oop dest = VTBuffer::relocate_return_value(thread, alloc_ptr, obj); 615 thread->set_return_buffered_value(NULL); 616 thread->set_vm_result(dest); 617 IRT_END 618 619 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 620 assert(oopDesc::is_oop(obj), "must be a valid oop"); 621 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 622 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 623 IRT_END 624 625 626 // Quicken instance-of and check-cast bytecodes 627 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 628 // Force resolving; quicken the bytecode 629 LastFrameAccessor last_frame(thread); 630 int which = last_frame.get_index_u2(Bytecodes::_checkcast); 631 ConstantPool* cpool = last_frame.method()->constants(); 632 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 633 // program we might have seen an unquick'd bytecode in the interpreter but have another 634 // thread quicken the bytecode before we get here. 635 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 636 Klass* klass = cpool->klass_at(which, CHECK); 637 thread->set_vm_result_2(klass); 638 IRT_END 639 640 641 //------------------------------------------------------------------------------------------------------------------------ 642 // Exceptions 643 644 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 645 const methodHandle& trap_method, int trap_bci, TRAPS) { 646 if (trap_method.not_null()) { 647 MethodData* trap_mdo = trap_method->method_data(); 648 if (trap_mdo == NULL) { 649 Method::build_interpreter_method_data(trap_method, THREAD); 650 if (HAS_PENDING_EXCEPTION) { 651 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 652 "we expect only an OOM error here"); 653 CLEAR_PENDING_EXCEPTION; 654 } 655 trap_mdo = trap_method->method_data(); 656 // and fall through... 657 } 658 if (trap_mdo != NULL) { 659 // Update per-method count of trap events. The interpreter 660 // is updating the MDO to simulate the effect of compiler traps. 661 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 662 } 663 } 664 } 665 666 // Assume the compiler is (or will be) interested in this event. 667 // If necessary, create an MDO to hold the information, and record it. 668 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 669 assert(ProfileTraps, "call me only if profiling"); 670 LastFrameAccessor last_frame(thread); 671 methodHandle trap_method(thread, last_frame.method()); 672 int trap_bci = trap_method->bci_from(last_frame.bcp()); 673 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 674 } 675 676 #ifdef CC_INTERP 677 // As legacy note_trap, but we have more arguments. 678 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 679 methodHandle trap_method(method); 680 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 681 IRT_END 682 683 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 684 // for each exception. 685 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 686 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 687 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 688 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 689 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 690 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 691 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 692 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 693 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 694 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 695 #endif // CC_INTERP 696 697 698 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 699 // get klass 700 InstanceKlass* klass = InstanceKlass::cast(k); 701 assert(klass->is_initialized(), 702 "this klass should have been initialized during VM initialization"); 703 // create instance - do not call constructor since we may have no 704 // (java) stack space left (should assert constructor is empty) 705 Handle exception; 706 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 707 exception = Handle(THREAD, exception_oop); 708 if (StackTraceInThrowable) { 709 java_lang_Throwable::fill_in_stack_trace(exception); 710 } 711 return exception; 712 } 713 714 // Special handling for stack overflow: since we don't have any (java) stack 715 // space left we use the pre-allocated & pre-initialized StackOverflowError 716 // klass to create an stack overflow error instance. We do not call its 717 // constructor for the same reason (it is empty, anyway). 718 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 719 Handle exception = get_preinitialized_exception( 720 SystemDictionary::StackOverflowError_klass(), 721 CHECK); 722 // Increment counter for hs_err file reporting 723 Atomic::inc(&Exceptions::_stack_overflow_errors); 724 THROW_HANDLE(exception); 725 IRT_END 726 727 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread)) 728 Handle exception = get_preinitialized_exception( 729 SystemDictionary::StackOverflowError_klass(), 730 CHECK); 731 java_lang_Throwable::set_message(exception(), 732 Universe::delayed_stack_overflow_error_message()); 733 // Increment counter for hs_err file reporting 734 Atomic::inc(&Exceptions::_stack_overflow_errors); 735 THROW_HANDLE(exception); 736 IRT_END 737 738 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 739 // lookup exception klass 740 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 741 if (ProfileTraps) { 742 if (s == vmSymbols::java_lang_ArithmeticException()) { 743 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 744 } else if (s == vmSymbols::java_lang_NullPointerException()) { 745 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 746 } 747 } 748 // create exception 749 Handle exception = Exceptions::new_exception(thread, s, message); 750 thread->set_vm_result(exception()); 751 IRT_END 752 753 754 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 755 // Produce the error message first because note_trap can safepoint 756 ResourceMark rm(thread); 757 const char* klass_name = obj->klass()->external_name(); 758 // lookup exception klass 759 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 760 if (ProfileTraps) { 761 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 762 } 763 // create exception, with klass name as detail message 764 Handle exception = Exceptions::new_exception(thread, s, klass_name); 765 thread->set_vm_result(exception()); 766 IRT_END 767 768 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index)) 769 // Produce the error message first because note_trap can safepoint 770 ResourceMark rm(thread); 771 stringStream ss; 772 ss.print("Index %d out of bounds for length %d", index, a->length()); 773 774 if (ProfileTraps) { 775 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 776 } 777 778 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 779 IRT_END 780 781 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 782 JavaThread* thread, oopDesc* obj)) 783 784 // Produce the error message first because note_trap can safepoint 785 ResourceMark rm(thread); 786 char* message = SharedRuntime::generate_class_cast_message( 787 thread, obj->klass()); 788 789 if (ProfileTraps) { 790 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 791 } 792 793 // create exception 794 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 795 IRT_END 796 797 // exception_handler_for_exception(...) returns the continuation address, 798 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 799 // The exception oop is returned to make sure it is preserved over GC (it 800 // is only on the stack if the exception was thrown explicitly via athrow). 801 // During this operation, the expression stack contains the values for the 802 // bci where the exception happened. If the exception was propagated back 803 // from a call, the expression stack contains the values for the bci at the 804 // invoke w/o arguments (i.e., as if one were inside the call). 805 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 806 807 LastFrameAccessor last_frame(thread); 808 Handle h_exception(thread, exception); 809 methodHandle h_method (thread, last_frame.method()); 810 constantPoolHandle h_constants(thread, h_method->constants()); 811 bool should_repeat; 812 int handler_bci; 813 int current_bci = last_frame.bci(); 814 815 if (thread->frames_to_pop_failed_realloc() > 0) { 816 // Allocation of scalar replaced object used in this frame 817 // failed. Unconditionally pop the frame. 818 thread->dec_frames_to_pop_failed_realloc(); 819 thread->set_vm_result(h_exception()); 820 // If the method is synchronized we already unlocked the monitor 821 // during deoptimization so the interpreter needs to skip it when 822 // the frame is popped. 823 thread->set_do_not_unlock_if_synchronized(true); 824 #ifdef CC_INTERP 825 return (address) -1; 826 #else 827 return Interpreter::remove_activation_entry(); 828 #endif 829 } 830 831 // Need to do this check first since when _do_not_unlock_if_synchronized 832 // is set, we don't want to trigger any classloading which may make calls 833 // into java, or surprisingly find a matching exception handler for bci 0 834 // since at this moment the method hasn't been "officially" entered yet. 835 if (thread->do_not_unlock_if_synchronized()) { 836 ResourceMark rm; 837 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 838 thread->set_vm_result(exception); 839 #ifdef CC_INTERP 840 return (address) -1; 841 #else 842 return Interpreter::remove_activation_entry(); 843 #endif 844 } 845 846 do { 847 should_repeat = false; 848 849 // assertions 850 #ifdef ASSERT 851 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 852 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 853 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 854 if (ExitVMOnVerifyError) vm_exit(-1); 855 ShouldNotReachHere(); 856 } 857 #endif 858 859 // tracing 860 if (log_is_enabled(Info, exceptions)) { 861 ResourceMark rm(thread); 862 stringStream tempst; 863 tempst.print("interpreter method <%s>\n" 864 " at bci %d for thread " INTPTR_FORMAT " (%s)", 865 h_method->print_value_string(), current_bci, p2i(thread), thread->name()); 866 Exceptions::log_exception(h_exception, tempst); 867 } 868 // Don't go paging in something which won't be used. 869 // else if (extable->length() == 0) { 870 // // disabled for now - interpreter is not using shortcut yet 871 // // (shortcut is not to call runtime if we have no exception handlers) 872 // // warning("performance bug: should not call runtime if method has no exception handlers"); 873 // } 874 // for AbortVMOnException flag 875 Exceptions::debug_check_abort(h_exception); 876 877 // exception handler lookup 878 Klass* klass = h_exception->klass(); 879 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD); 880 if (HAS_PENDING_EXCEPTION) { 881 // We threw an exception while trying to find the exception handler. 882 // Transfer the new exception to the exception handle which will 883 // be set into thread local storage, and do another lookup for an 884 // exception handler for this exception, this time starting at the 885 // BCI of the exception handler which caused the exception to be 886 // thrown (bug 4307310). 887 h_exception = Handle(THREAD, PENDING_EXCEPTION); 888 CLEAR_PENDING_EXCEPTION; 889 if (handler_bci >= 0) { 890 current_bci = handler_bci; 891 should_repeat = true; 892 } 893 } 894 } while (should_repeat == true); 895 896 #if INCLUDE_JVMCI 897 if (EnableJVMCI && h_method->method_data() != NULL) { 898 ResourceMark rm(thread); 899 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 900 if (pdata != NULL && pdata->is_BitData()) { 901 BitData* bit_data = (BitData*) pdata; 902 bit_data->set_exception_seen(); 903 } 904 } 905 #endif 906 907 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 908 // time throw or a stack unwinding throw and accordingly notify the debugger 909 if (JvmtiExport::can_post_on_exceptions()) { 910 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception()); 911 } 912 913 #ifdef CC_INTERP 914 address continuation = (address)(intptr_t) handler_bci; 915 #else 916 address continuation = NULL; 917 #endif 918 address handler_pc = NULL; 919 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 920 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 921 // handler in this method, or (b) after a stack overflow there is not yet 922 // enough stack space available to reprotect the stack. 923 #ifndef CC_INTERP 924 continuation = Interpreter::remove_activation_entry(); 925 #endif 926 #if COMPILER2_OR_JVMCI 927 // Count this for compilation purposes 928 h_method->interpreter_throwout_increment(THREAD); 929 #endif 930 } else { 931 // handler in this method => change bci/bcp to handler bci/bcp and continue there 932 handler_pc = h_method->code_base() + handler_bci; 933 #ifndef CC_INTERP 934 set_bcp_and_mdp(handler_pc, thread); 935 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 936 #endif 937 } 938 // notify debugger of an exception catch 939 // (this is good for exceptions caught in native methods as well) 940 if (JvmtiExport::can_post_on_exceptions()) { 941 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 942 } 943 944 thread->set_vm_result(h_exception()); 945 return continuation; 946 IRT_END 947 948 949 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 950 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 951 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 952 IRT_END 953 954 955 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 956 THROW(vmSymbols::java_lang_AbstractMethodError()); 957 IRT_END 958 959 // This method is called from the "abstract_entry" of the interpreter. 960 // At that point, the arguments have already been removed from the stack 961 // and therefore we don't have the receiver object at our fingertips. (Though, 962 // on some platforms the receiver still resides in a register...). Thus, 963 // we have no choice but print an error message not containing the receiver 964 // type. 965 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread, 966 Method* missingMethod)) 967 ResourceMark rm(thread); 968 assert(missingMethod != NULL, "sanity"); 969 methodHandle m(thread, missingMethod); 970 LinkResolver::throw_abstract_method_error(m, THREAD); 971 IRT_END 972 973 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread, 974 Klass* recvKlass, 975 Method* missingMethod)) 976 ResourceMark rm(thread); 977 methodHandle mh = methodHandle(thread, missingMethod); 978 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD); 979 IRT_END 980 981 982 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 983 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 984 IRT_END 985 986 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread, 987 Klass* recvKlass, 988 Klass* interfaceKlass)) 989 ResourceMark rm(thread); 990 char buf[1000]; 991 buf[0] = '\0'; 992 jio_snprintf(buf, sizeof(buf), 993 "Class %s does not implement the requested interface %s", 994 recvKlass ? recvKlass->external_name() : "NULL", 995 interfaceKlass ? interfaceKlass->external_name() : "NULL"); 996 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 997 IRT_END 998 999 //------------------------------------------------------------------------------------------------------------------------ 1000 // Fields 1001 // 1002 1003 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 1004 Thread* THREAD = thread; 1005 // resolve field 1006 fieldDescriptor info; 1007 LastFrameAccessor last_frame(thread); 1008 constantPoolHandle pool(thread, last_frame.method()->constants()); 1009 methodHandle m(thread, last_frame.method()); 1010 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 1011 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield); 1012 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 1013 bool is_value = bytecode == Bytecodes::_withfield; 1014 1015 { 1016 JvmtiHideSingleStepping jhss(thread); 1017 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode), 1018 m, bytecode, CHECK); 1019 } // end JvmtiHideSingleStepping 1020 1021 // check if link resolution caused cpCache to be updated 1022 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1023 if (cp_cache_entry->is_resolved(bytecode)) return; 1024 1025 // compute auxiliary field attributes 1026 TosState state = as_TosState(info.field_type()); 1027 1028 // Resolution of put instructions on final fields is delayed. That is required so that 1029 // exceptions are thrown at the correct place (when the instruction is actually invoked). 1030 // If we do not resolve an instruction in the current pass, leaving the put_code 1031 // set to zero will cause the next put instruction to the same field to reresolve. 1032 1033 // Resolution of put instructions to final instance fields with invalid updates (i.e., 1034 // to final instance fields with updates originating from a method different than <init>) 1035 // is inhibited. A putfield instruction targeting an instance final field must throw 1036 // an IllegalAccessError if the instruction is not in an instance 1037 // initializer method <init>. If resolution were not inhibited, a putfield 1038 // in an initializer method could be resolved in the initializer. Subsequent 1039 // putfield instructions to the same field would then use cached information. 1040 // As a result, those instructions would not pass through the VM. That is, 1041 // checks in resolve_field_access() would not be executed for those instructions 1042 // and the required IllegalAccessError would not be thrown. 1043 // 1044 // Also, we need to delay resolving getstatic and putstatic instructions until the 1045 // class is initialized. This is required so that access to the static 1046 // field will call the initialization function every time until the class 1047 // is completely initialized ala. in 2.17.5 in JVM Specification. 1048 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 1049 bool uninitialized_static = is_static && !klass->is_initialized(); 1050 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 1051 info.has_initialized_final_update(); 1052 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); 1053 1054 Bytecodes::Code get_code = (Bytecodes::Code)0; 1055 Bytecodes::Code put_code = (Bytecodes::Code)0; 1056 if (!uninitialized_static) { 1057 if (is_static) { 1058 get_code = Bytecodes::_getstatic; 1059 } else { 1060 get_code = Bytecodes::_getfield; 1061 } 1062 if (is_put && is_value) { 1063 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield); 1064 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 1065 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 1066 } 1067 } 1068 1069 cp_cache_entry->set_field( 1070 get_code, 1071 put_code, 1072 info.field_holder(), 1073 info.index(), 1074 info.offset(), 1075 state, 1076 info.access_flags().is_final(), 1077 info.access_flags().is_volatile(), 1078 info.is_flattened(), 1079 info.is_flattenable(), 1080 pool->pool_holder() 1081 ); 1082 } 1083 1084 1085 //------------------------------------------------------------------------------------------------------------------------ 1086 // Synchronization 1087 // 1088 // The interpreter's synchronization code is factored out so that it can 1089 // be shared by method invocation and synchronized blocks. 1090 //%note synchronization_3 1091 1092 //%note monitor_1 1093 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 1094 #ifdef ASSERT 1095 thread->last_frame().interpreter_frame_verify_monitor(elem); 1096 #endif 1097 if (PrintBiasedLockingStatistics) { 1098 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 1099 } 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 (UseBiasedLocking) { 1104 // Retry fast entry if bias is revoked to avoid unnecessary inflation 1105 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 1106 } else { 1107 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 1108 } 1109 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 1110 "must be NULL or an object"); 1111 #ifdef ASSERT 1112 thread->last_frame().interpreter_frame_verify_monitor(elem); 1113 #endif 1114 IRT_END 1115 1116 1117 //%note monitor_1 1118 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 1119 #ifdef ASSERT 1120 thread->last_frame().interpreter_frame_verify_monitor(elem); 1121 #endif 1122 Handle h_obj(thread, elem->obj()); 1123 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 1124 "must be NULL or an object"); 1125 if (elem == NULL || h_obj()->is_unlocked()) { 1126 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 1127 } 1128 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 1129 // Free entry. This must be done here, since a pending exception might be installed on 1130 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 1131 elem->set_obj(NULL); 1132 #ifdef ASSERT 1133 thread->last_frame().interpreter_frame_verify_monitor(elem); 1134 #endif 1135 IRT_END 1136 1137 1138 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 1139 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 1140 IRT_END 1141 1142 1143 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 1144 // Returns an illegal exception to install into the current thread. The 1145 // pending_exception flag is cleared so normal exception handling does not 1146 // trigger. Any current installed exception will be overwritten. This 1147 // method will be called during an exception unwind. 1148 1149 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 1150 Handle exception(thread, thread->vm_result()); 1151 assert(exception() != NULL, "vm result should be set"); 1152 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 1153 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 1154 exception = get_preinitialized_exception( 1155 SystemDictionary::IllegalMonitorStateException_klass(), 1156 CATCH); 1157 } 1158 thread->set_vm_result(exception()); 1159 IRT_END 1160 1161 1162 //------------------------------------------------------------------------------------------------------------------------ 1163 // Invokes 1164 1165 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 1166 return method->orig_bytecode_at(method->bci_from(bcp)); 1167 IRT_END 1168 1169 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 1170 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 1171 IRT_END 1172 1173 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 1174 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 1175 IRT_END 1176 1177 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 1178 Thread* THREAD = thread; 1179 LastFrameAccessor last_frame(thread); 1180 // extract receiver from the outgoing argument list if necessary 1181 Handle receiver(thread, NULL); 1182 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 1183 bytecode == Bytecodes::_invokespecial) { 1184 ResourceMark rm(thread); 1185 methodHandle m (thread, last_frame.method()); 1186 Bytecode_invoke call(m, last_frame.bci()); 1187 Symbol* signature = call.signature(); 1188 receiver = Handle(thread, last_frame.callee_receiver(signature)); 1189 1190 assert(Universe::heap()->is_in_reserved_or_null(receiver()) 1191 || VTBuffer::is_in_vt_buffer(receiver()), 1192 "sanity check"); 1193 assert(receiver.is_null() || 1194 !Universe::heap()->is_in_reserved(receiver->klass()), 1195 "sanity check"); 1196 } 1197 1198 // resolve method 1199 CallInfo info; 1200 constantPoolHandle pool(thread, last_frame.method()->constants()); 1201 1202 { 1203 JvmtiHideSingleStepping jhss(thread); 1204 LinkResolver::resolve_invoke(info, receiver, pool, 1205 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1206 CHECK); 1207 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 1208 int retry_count = 0; 1209 while (info.resolved_method()->is_old()) { 1210 // It is very unlikely that method is redefined more than 100 times 1211 // in the middle of resolve. If it is looping here more than 100 times 1212 // means then there could be a bug here. 1213 guarantee((retry_count++ < 100), 1214 "Could not resolve to latest version of redefined method"); 1215 // method is redefined in the middle of resolve so re-try. 1216 LinkResolver::resolve_invoke(info, receiver, pool, 1217 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1218 CHECK); 1219 } 1220 } 1221 } // end JvmtiHideSingleStepping 1222 1223 // check if link resolution caused cpCache to be updated 1224 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1225 if (cp_cache_entry->is_resolved(bytecode)) return; 1226 1227 #ifdef ASSERT 1228 if (bytecode == Bytecodes::_invokeinterface) { 1229 if (info.resolved_method()->method_holder() == 1230 SystemDictionary::Object_klass()) { 1231 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 1232 // (see also CallInfo::set_interface for details) 1233 assert(info.call_kind() == CallInfo::vtable_call || 1234 info.call_kind() == CallInfo::direct_call, ""); 1235 methodHandle rm = info.resolved_method(); 1236 assert(rm->is_final() || info.has_vtable_index(), 1237 "should have been set already"); 1238 } else if (!info.resolved_method()->has_itable_index()) { 1239 // Resolved something like CharSequence.toString. Use vtable not itable. 1240 assert(info.call_kind() != CallInfo::itable_call, ""); 1241 } else { 1242 // Setup itable entry 1243 assert(info.call_kind() == CallInfo::itable_call, ""); 1244 int index = info.resolved_method()->itable_index(); 1245 assert(info.itable_index() == index, ""); 1246 } 1247 } else if (bytecode == Bytecodes::_invokespecial) { 1248 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 1249 } else { 1250 assert(info.call_kind() == CallInfo::direct_call || 1251 info.call_kind() == CallInfo::vtable_call, ""); 1252 } 1253 #endif 1254 // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if 1255 // it is not an interface. The receiver for invokespecial calls within interface 1256 // methods must be checked for every call. 1257 InstanceKlass* sender = pool->pool_holder(); 1258 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender; 1259 1260 switch (info.call_kind()) { 1261 case CallInfo::direct_call: 1262 cp_cache_entry->set_direct_call( 1263 bytecode, 1264 info.resolved_method(), 1265 sender->is_interface()); 1266 break; 1267 case CallInfo::vtable_call: 1268 cp_cache_entry->set_vtable_call( 1269 bytecode, 1270 info.resolved_method(), 1271 info.vtable_index()); 1272 break; 1273 case CallInfo::itable_call: 1274 cp_cache_entry->set_itable_call( 1275 bytecode, 1276 info.resolved_klass(), 1277 info.resolved_method(), 1278 info.itable_index()); 1279 break; 1280 default: ShouldNotReachHere(); 1281 } 1282 } 1283 1284 1285 // First time execution: Resolve symbols, create a permanent MethodType object. 1286 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 1287 Thread* THREAD = thread; 1288 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 1289 LastFrameAccessor last_frame(thread); 1290 1291 // resolve method 1292 CallInfo info; 1293 constantPoolHandle pool(thread, last_frame.method()->constants()); 1294 { 1295 JvmtiHideSingleStepping jhss(thread); 1296 LinkResolver::resolve_invoke(info, Handle(), pool, 1297 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1298 CHECK); 1299 } // end JvmtiHideSingleStepping 1300 1301 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1302 cp_cache_entry->set_method_handle(pool, info); 1303 } 1304 1305 // First time execution: Resolve symbols, create a permanent CallSite object. 1306 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 1307 Thread* THREAD = thread; 1308 LastFrameAccessor last_frame(thread); 1309 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 1310 1311 //TO DO: consider passing BCI to Java. 1312 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp()); 1313 1314 // resolve method 1315 CallInfo info; 1316 constantPoolHandle pool(thread, last_frame.method()->constants()); 1317 int index = last_frame.get_index_u4(bytecode); 1318 { 1319 JvmtiHideSingleStepping jhss(thread); 1320 LinkResolver::resolve_invoke(info, Handle(), pool, 1321 index, bytecode, CHECK); 1322 } // end JvmtiHideSingleStepping 1323 1324 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 1325 cp_cache_entry->set_dynamic_call(pool, info); 1326 } 1327 1328 // This function is the interface to the assembly code. It returns the resolved 1329 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 1330 // This function will check for redefinition! 1331 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 1332 switch (bytecode) { 1333 case Bytecodes::_getstatic: 1334 case Bytecodes::_putstatic: 1335 case Bytecodes::_getfield: 1336 case Bytecodes::_putfield: 1337 case Bytecodes::_withfield: 1338 resolve_get_put(thread, bytecode); 1339 break; 1340 case Bytecodes::_invokevirtual: 1341 case Bytecodes::_invokespecial: 1342 case Bytecodes::_invokestatic: 1343 case Bytecodes::_invokeinterface: 1344 resolve_invoke(thread, bytecode); 1345 break; 1346 case Bytecodes::_invokehandle: 1347 resolve_invokehandle(thread); 1348 break; 1349 case Bytecodes::_invokedynamic: 1350 resolve_invokedynamic(thread); 1351 break; 1352 default: 1353 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 1354 break; 1355 } 1356 } 1357 IRT_END 1358 1359 //------------------------------------------------------------------------------------------------------------------------ 1360 // Miscellaneous 1361 1362 1363 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 1364 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 1365 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 1366 if (branch_bcp != NULL && nm != NULL) { 1367 // This was a successful request for an OSR nmethod. Because 1368 // frequency_counter_overflow_inner ends with a safepoint check, 1369 // nm could have been unloaded so look it up again. It's unsafe 1370 // to examine nm directly since it might have been freed and used 1371 // for something else. 1372 LastFrameAccessor last_frame(thread); 1373 Method* method = last_frame.method(); 1374 int bci = method->bci_from(last_frame.bcp()); 1375 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 1376 } 1377 if (nm != NULL && thread->is_interp_only_mode()) { 1378 // Normally we never get an nm if is_interp_only_mode() is true, because 1379 // policy()->event has a check for this and won't compile the method when 1380 // true. However, it's possible for is_interp_only_mode() to become true 1381 // during the compilation. We don't want to return the nm in that case 1382 // because we want to continue to execute interpreted. 1383 nm = NULL; 1384 } 1385 #ifndef PRODUCT 1386 if (TraceOnStackReplacement) { 1387 if (nm != NULL) { 1388 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 1389 nm->print(); 1390 } 1391 } 1392 #endif 1393 return nm; 1394 } 1395 1396 IRT_ENTRY(nmethod*, 1397 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 1398 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1399 // flag, in case this method triggers classloading which will call into Java. 1400 UnlockFlagSaver fs(thread); 1401 1402 LastFrameAccessor last_frame(thread); 1403 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1404 methodHandle method(thread, last_frame.method()); 1405 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 1406 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci; 1407 1408 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 1409 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 1410 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 1411 1412 if (osr_nm != NULL) { 1413 // We may need to do on-stack replacement which requires that no 1414 // monitors in the activation are biased because their 1415 // BasicObjectLocks will need to migrate during OSR. Force 1416 // unbiasing of all monitors in the activation now (even though 1417 // the OSR nmethod might be invalidated) because we don't have a 1418 // safepoint opportunity later once the migration begins. 1419 if (UseBiasedLocking) { 1420 ResourceMark rm; 1421 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 1422 for( BasicObjectLock *kptr = last_frame.monitor_end(); 1423 kptr < last_frame.monitor_begin(); 1424 kptr = last_frame.next_monitor(kptr) ) { 1425 if( kptr->obj() != NULL ) { 1426 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 1427 } 1428 } 1429 BiasedLocking::revoke(objects_to_revoke); 1430 } 1431 } 1432 return osr_nm; 1433 IRT_END 1434 1435 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 1436 assert(ProfileInterpreter, "must be profiling interpreter"); 1437 int bci = method->bci_from(cur_bcp); 1438 MethodData* mdo = method->method_data(); 1439 if (mdo == NULL) return 0; 1440 return mdo->bci_to_di(bci); 1441 IRT_END 1442 1443 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 1444 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1445 // flag, in case this method triggers classloading which will call into Java. 1446 UnlockFlagSaver fs(thread); 1447 1448 assert(ProfileInterpreter, "must be profiling interpreter"); 1449 LastFrameAccessor last_frame(thread); 1450 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1451 methodHandle method(thread, last_frame.method()); 1452 Method::build_interpreter_method_data(method, THREAD); 1453 if (HAS_PENDING_EXCEPTION) { 1454 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1455 CLEAR_PENDING_EXCEPTION; 1456 // and fall through... 1457 } 1458 IRT_END 1459 1460 1461 #ifdef ASSERT 1462 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 1463 assert(ProfileInterpreter, "must be profiling interpreter"); 1464 1465 MethodData* mdo = method->method_data(); 1466 assert(mdo != NULL, "must not be null"); 1467 1468 int bci = method->bci_from(bcp); 1469 1470 address mdp2 = mdo->bci_to_dp(bci); 1471 if (mdp != mdp2) { 1472 ResourceMark rm; 1473 ResetNoHandleMark rnm; // In a LEAF entry. 1474 HandleMark hm; 1475 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1476 int current_di = mdo->dp_to_di(mdp); 1477 int expected_di = mdo->dp_to_di(mdp2); 1478 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1479 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1480 int approx_bci = -1; 1481 if (current_di >= 0) { 1482 approx_bci = mdo->data_at(current_di)->bci(); 1483 } 1484 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1485 mdo->print_on(tty); 1486 method->print_codes(); 1487 } 1488 assert(mdp == mdp2, "wrong mdp"); 1489 IRT_END 1490 #endif // ASSERT 1491 1492 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1493 assert(ProfileInterpreter, "must be profiling interpreter"); 1494 ResourceMark rm(thread); 1495 HandleMark hm(thread); 1496 LastFrameAccessor last_frame(thread); 1497 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1498 MethodData* h_mdo = last_frame.method()->method_data(); 1499 1500 // Grab a lock to ensure atomic access to setting the return bci and 1501 // the displacement. This can block and GC, invalidating all naked oops. 1502 MutexLocker ml(RetData_lock); 1503 1504 // ProfileData is essentially a wrapper around a derived oop, so we 1505 // need to take the lock before making any ProfileData structures. 1506 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp())); 1507 guarantee(data != NULL, "profile data must be valid"); 1508 RetData* rdata = data->as_RetData(); 1509 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1510 last_frame.set_mdp(new_mdp); 1511 IRT_END 1512 1513 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1514 MethodCounters* mcs = Method::build_method_counters(m, thread); 1515 if (HAS_PENDING_EXCEPTION) { 1516 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1517 CLEAR_PENDING_EXCEPTION; 1518 } 1519 return mcs; 1520 IRT_END 1521 1522 1523 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1524 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1525 // stack traversal automatically takes care of preserving arguments for invoke, so 1526 // this is no longer needed. 1527 1528 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1529 // if this is called during a safepoint 1530 1531 if (JvmtiExport::should_post_single_step()) { 1532 // We are called during regular safepoints and when the VM is 1533 // single stepping. If any thread is marked for single stepping, 1534 // then we may have JVMTI work to do. 1535 LastFrameAccessor last_frame(thread); 1536 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp()); 1537 } 1538 IRT_END 1539 1540 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1541 ConstantPoolCacheEntry *cp_entry)) 1542 1543 // check the access_flags for the field in the klass 1544 1545 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1546 int index = cp_entry->field_index(); 1547 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1548 1549 bool is_static = (obj == NULL); 1550 HandleMark hm(thread); 1551 1552 Handle h_obj; 1553 if (!is_static) { 1554 // non-static field accessors have an object, but we need a handle 1555 h_obj = Handle(thread, obj); 1556 } 1557 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass()); 1558 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static); 1559 LastFrameAccessor last_frame(thread); 1560 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid); 1561 IRT_END 1562 1563 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1564 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1565 1566 Klass* k = cp_entry->f1_as_klass(); 1567 1568 // check the access_flags for the field in the klass 1569 InstanceKlass* ik = InstanceKlass::cast(k); 1570 int index = cp_entry->field_index(); 1571 // bail out if field modifications are not watched 1572 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1573 1574 char sig_type = '\0'; 1575 1576 switch(cp_entry->flag_state()) { 1577 case btos: sig_type = 'B'; break; 1578 case ztos: sig_type = 'Z'; break; 1579 case ctos: sig_type = 'C'; break; 1580 case stos: sig_type = 'S'; break; 1581 case itos: sig_type = 'I'; break; 1582 case ftos: sig_type = 'F'; break; 1583 case atos: sig_type = 'L'; break; 1584 case ltos: sig_type = 'J'; break; 1585 case dtos: sig_type = 'D'; break; 1586 default: ShouldNotReachHere(); return; 1587 } 1588 bool is_static = (obj == NULL); 1589 1590 HandleMark hm(thread); 1591 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static); 1592 jvalue fvalue; 1593 #ifdef _LP64 1594 fvalue = *value; 1595 #else 1596 // Long/double values are stored unaligned and also noncontiguously with 1597 // tagged stacks. We can't just do a simple assignment even in the non- 1598 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1599 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1600 // We assume that the two halves of longs/doubles are stored in interpreter 1601 // stack slots in platform-endian order. 1602 jlong_accessor u; 1603 jint* newval = (jint*)value; 1604 u.words[0] = newval[0]; 1605 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1606 fvalue.j = u.long_value; 1607 #endif // _LP64 1608 1609 Handle h_obj; 1610 if (!is_static) { 1611 // non-static field accessors have an object, but we need a handle 1612 h_obj = Handle(thread, obj); 1613 } 1614 1615 LastFrameAccessor last_frame(thread); 1616 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj, 1617 fid, sig_type, &fvalue); 1618 IRT_END 1619 1620 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1621 LastFrameAccessor last_frame(thread); 1622 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame()); 1623 IRT_END 1624 1625 1626 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1627 LastFrameAccessor last_frame(thread); 1628 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame()); 1629 IRT_END 1630 1631 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1632 { 1633 return (Interpreter::contains(pc) ? 1 : 0); 1634 } 1635 IRT_END 1636 1637 1638 // Implementation of SignatureHandlerLibrary 1639 1640 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1641 // Dummy definition (else normalization method is defined in CPU 1642 // dependant code) 1643 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1644 return fingerprint; 1645 } 1646 #endif 1647 1648 address SignatureHandlerLibrary::set_handler_blob() { 1649 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1650 if (handler_blob == NULL) { 1651 return NULL; 1652 } 1653 address handler = handler_blob->code_begin(); 1654 _handler_blob = handler_blob; 1655 _handler = handler; 1656 return handler; 1657 } 1658 1659 void SignatureHandlerLibrary::initialize() { 1660 if (_fingerprints != NULL) { 1661 return; 1662 } 1663 if (set_handler_blob() == NULL) { 1664 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1665 } 1666 1667 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1668 SignatureHandlerLibrary::buffer_size); 1669 _buffer = bb->code_begin(); 1670 1671 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1672 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1673 } 1674 1675 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1676 address handler = _handler; 1677 int insts_size = buffer->pure_insts_size(); 1678 if (handler + insts_size > _handler_blob->code_end()) { 1679 // get a new handler blob 1680 handler = set_handler_blob(); 1681 } 1682 if (handler != NULL) { 1683 memcpy(handler, buffer->insts_begin(), insts_size); 1684 pd_set_handler(handler); 1685 ICache::invalidate_range(handler, insts_size); 1686 _handler = handler + insts_size; 1687 } 1688 return handler; 1689 } 1690 1691 void SignatureHandlerLibrary::add(const methodHandle& method) { 1692 if (method->signature_handler() == NULL) { 1693 // use slow signature handler if we can't do better 1694 int handler_index = -1; 1695 // check if we can use customized (fast) signature handler 1696 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1697 // use customized signature handler 1698 MutexLocker mu(SignatureHandlerLibrary_lock); 1699 // make sure data structure is initialized 1700 initialize(); 1701 // lookup method signature's fingerprint 1702 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1703 // allow CPU dependant code to optimize the fingerprints for the fast handler 1704 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1705 handler_index = _fingerprints->find(fingerprint); 1706 // create handler if necessary 1707 if (handler_index < 0) { 1708 ResourceMark rm; 1709 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer; 1710 CodeBuffer buffer((address)(_buffer + align_offset), 1711 SignatureHandlerLibrary::buffer_size - align_offset); 1712 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1713 // copy into code heap 1714 address handler = set_handler(&buffer); 1715 if (handler == NULL) { 1716 // use slow signature handler (without memorizing it in the fingerprints) 1717 } else { 1718 // debugging suppport 1719 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1720 ttyLocker ttyl; 1721 tty->cr(); 1722 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1723 _handlers->length(), 1724 (method->is_static() ? "static" : "receiver"), 1725 method->name_and_sig_as_C_string(), 1726 fingerprint, 1727 buffer.insts_size()); 1728 if (buffer.insts_size() > 0) { 1729 Disassembler::decode(handler, handler + buffer.insts_size()); 1730 } 1731 #ifndef PRODUCT 1732 address rh_begin = Interpreter::result_handler(method()->result_type()); 1733 if (CodeCache::contains(rh_begin)) { 1734 // else it might be special platform dependent values 1735 tty->print_cr(" --- associated result handler ---"); 1736 address rh_end = rh_begin; 1737 while (*(int*)rh_end != 0) { 1738 rh_end += sizeof(int); 1739 } 1740 Disassembler::decode(rh_begin, rh_end); 1741 } else { 1742 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1743 } 1744 #endif 1745 } 1746 // add handler to library 1747 _fingerprints->append(fingerprint); 1748 _handlers->append(handler); 1749 // set handler index 1750 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1751 handler_index = _fingerprints->length() - 1; 1752 } 1753 } 1754 // Set handler under SignatureHandlerLibrary_lock 1755 if (handler_index < 0) { 1756 // use generic signature handler 1757 method->set_signature_handler(Interpreter::slow_signature_handler()); 1758 } else { 1759 // set handler 1760 method->set_signature_handler(_handlers->at(handler_index)); 1761 } 1762 } else { 1763 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1764 // use generic signature handler 1765 method->set_signature_handler(Interpreter::slow_signature_handler()); 1766 } 1767 } 1768 #ifdef ASSERT 1769 int handler_index = -1; 1770 int fingerprint_index = -2; 1771 { 1772 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1773 // in any way if accessed from multiple threads. To avoid races with another 1774 // thread which may change the arrays in the above, mutex protected block, we 1775 // have to protect this read access here with the same mutex as well! 1776 MutexLocker mu(SignatureHandlerLibrary_lock); 1777 if (_handlers != NULL) { 1778 handler_index = _handlers->find(method->signature_handler()); 1779 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1780 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1781 fingerprint_index = _fingerprints->find(fingerprint); 1782 } 1783 } 1784 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1785 handler_index == fingerprint_index, "sanity check"); 1786 #endif // ASSERT 1787 } 1788 1789 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1790 int handler_index = -1; 1791 // use customized signature handler 1792 MutexLocker mu(SignatureHandlerLibrary_lock); 1793 // make sure data structure is initialized 1794 initialize(); 1795 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1796 handler_index = _fingerprints->find(fingerprint); 1797 // create handler if necessary 1798 if (handler_index < 0) { 1799 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1800 tty->cr(); 1801 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1802 _handlers->length(), 1803 p2i(handler), 1804 fingerprint); 1805 } 1806 _fingerprints->append(fingerprint); 1807 _handlers->append(handler); 1808 } else { 1809 if (PrintSignatureHandlers) { 1810 tty->cr(); 1811 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1812 _handlers->length(), 1813 fingerprint, 1814 p2i(_handlers->at(handler_index)), 1815 p2i(handler)); 1816 } 1817 } 1818 } 1819 1820 1821 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1822 address SignatureHandlerLibrary::_handler = NULL; 1823 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1824 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1825 address SignatureHandlerLibrary::_buffer = NULL; 1826 1827 1828 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1829 methodHandle m(thread, method); 1830 assert(m->is_native(), "sanity check"); 1831 // lookup native function entry point if it doesn't exist 1832 bool in_base_library; 1833 if (!m->has_native_function()) { 1834 NativeLookup::lookup(m, in_base_library, CHECK); 1835 } 1836 // make sure signature handler is installed 1837 SignatureHandlerLibrary::add(m); 1838 // The interpreter entry point checks the signature handler first, 1839 // before trying to fetch the native entry point and klass mirror. 1840 // We must set the signature handler last, so that multiple processors 1841 // preparing the same method will be sure to see non-null entry & mirror. 1842 IRT_END 1843 1844 IRT_ENTRY(void, InterpreterRuntime::deoptimize_caller_frame_for_vt(JavaThread* thread, Method* callee)) 1845 // Called from within the owner thread, so no need for safepoint 1846 assert(callee->is_returning_vt(), "must be"); 1847 RegisterMap reg_map(thread); 1848 frame last_frame = thread->last_frame(); 1849 frame caller_frame = last_frame.sender(®_map); 1850 Deoptimization::deoptimize_frame(thread, caller_frame.id()); 1851 IRT_END 1852 1853 #if defined(IA32) || defined(AMD64) || defined(ARM) 1854 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1855 if (src_address == dest_address) { 1856 return; 1857 } 1858 ResetNoHandleMark rnm; // In a LEAF entry. 1859 HandleMark hm; 1860 ResourceMark rm; 1861 LastFrameAccessor last_frame(thread); 1862 assert(last_frame.is_interpreted_frame(), ""); 1863 jint bci = last_frame.bci(); 1864 methodHandle mh(thread, last_frame.method()); 1865 Bytecode_invoke invoke(mh, bci); 1866 ArgumentSizeComputer asc(invoke.signature()); 1867 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1868 Copy::conjoint_jbytes(src_address, dest_address, 1869 size_of_arguments * Interpreter::stackElementSize); 1870 IRT_END 1871 #endif 1872 1873 #if INCLUDE_JVMTI 1874 // This is a support of the JVMTI PopFrame interface. 1875 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1876 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1877 // The member_name argument is a saved reference (in local#0) to the member_name. 1878 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1879 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1880 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1881 Method* method, address bcp)) 1882 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1883 if (code != Bytecodes::_invokestatic) { 1884 return; 1885 } 1886 ConstantPool* cpool = method->constants(); 1887 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1888 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1889 Symbol* mname = cpool->name_ref_at(cp_index); 1890 1891 if (MethodHandles::has_member_arg(cname, mname)) { 1892 oop member_name_oop = (oop) member_name; 1893 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1894 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1895 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1896 } 1897 thread->set_vm_result(member_name_oop); 1898 } else { 1899 thread->set_vm_result(NULL); 1900 } 1901 IRT_END 1902 #endif // INCLUDE_JVMTI 1903 1904 #ifndef PRODUCT 1905 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to 1906 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1907 // The generated code still uses call_VM because that will set up the frame pointer for 1908 // bcp and method. 1909 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1910 LastFrameAccessor last_frame(thread); 1911 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame"); 1912 methodHandle mh(thread, last_frame.method()); 1913 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2); 1914 return preserve_this_value; 1915 IRT_END 1916 #endif // !PRODUCT