1 /* 2 * Copyright (c) 1997, 2024, 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/symbolTable.hpp" 28 #include "classfile/vmClasses.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/codeCache.hpp" 31 #include "compiler/compilationPolicy.hpp" 32 #include "compiler/compileBroker.hpp" 33 #include "compiler/disassembler.hpp" 34 #include "gc/shared/barrierSetNMethod.hpp" 35 #include "gc/shared/collectedHeap.hpp" 36 #include "interpreter/bytecodeTracer.hpp" 37 #include "interpreter/interpreter.hpp" 38 #include "interpreter/interpreterRuntime.hpp" 39 #include "interpreter/linkResolver.hpp" 40 #include "interpreter/templateTable.hpp" 41 #include "jvm_io.h" 42 #include "logging/log.hpp" 43 #include "memory/oopFactory.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "memory/universe.hpp" 46 #include "oops/constantPool.inline.hpp" 47 #include "oops/cpCache.inline.hpp" 48 #include "oops/instanceKlass.inline.hpp" 49 #include "oops/klass.inline.hpp" 50 #include "oops/methodData.hpp" 51 #include "oops/method.inline.hpp" 52 #include "oops/objArrayKlass.hpp" 53 #include "oops/objArrayOop.inline.hpp" 54 #include "oops/oop.inline.hpp" 55 #include "oops/symbol.hpp" 56 #include "prims/jvmtiExport.hpp" 57 #include "prims/methodHandles.hpp" 58 #include "prims/nativeLookup.hpp" 59 #include "runtime/atomic.hpp" 60 #include "runtime/continuation.hpp" 61 #include "runtime/deoptimization.hpp" 62 #include "runtime/fieldDescriptor.inline.hpp" 63 #include "runtime/frame.inline.hpp" 64 #include "runtime/handles.inline.hpp" 65 #include "runtime/icache.hpp" 66 #include "runtime/interfaceSupport.inline.hpp" 67 #include "runtime/java.hpp" 68 #include "runtime/javaCalls.hpp" 69 #include "runtime/jfieldIDWorkaround.hpp" 70 #include "runtime/osThread.hpp" 71 #include "runtime/perfData.inline.hpp" 72 #include "runtime/sharedRuntime.hpp" 73 #include "runtime/stackWatermarkSet.hpp" 74 #include "runtime/stubRoutines.hpp" 75 #include "runtime/synchronizer.hpp" 76 #include "runtime/threadCritical.hpp" 77 #include "services/management.hpp" 78 #include "utilities/align.hpp" 79 #include "utilities/checkedCast.hpp" 80 #include "utilities/copy.hpp" 81 #include "utilities/events.hpp" 82 #ifdef COMPILER2 83 #include "opto/runtime.hpp" 84 #endif 85 86 // Helper class to access current interpreter state 87 class LastFrameAccessor : public StackObj { 88 frame _last_frame; 89 public: 90 LastFrameAccessor(JavaThread* current) { 91 assert(current == Thread::current(), "sanity"); 92 _last_frame = current->last_frame(); 93 } 94 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); } 95 Method* method() const { return _last_frame.interpreter_frame_method(); } 96 address bcp() const { return _last_frame.interpreter_frame_bcp(); } 97 int bci() const { return _last_frame.interpreter_frame_bci(); } 98 address mdp() const { return _last_frame.interpreter_frame_mdp(); } 99 100 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); } 101 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); } 102 103 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272) 104 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); } 105 106 Bytecode bytecode() const { return Bytecode(method(), bcp()); } 107 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); } 108 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); } 109 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); } 110 int number_of_dimensions() const { return bcp()[3]; } 111 112 oop callee_receiver(Symbol* signature) { 113 return _last_frame.interpreter_callee_receiver(signature); 114 } 115 BasicObjectLock* monitor_begin() const { 116 return _last_frame.interpreter_frame_monitor_begin(); 117 } 118 BasicObjectLock* monitor_end() const { 119 return _last_frame.interpreter_frame_monitor_end(); 120 } 121 BasicObjectLock* next_monitor(BasicObjectLock* current) const { 122 return _last_frame.next_monitor_in_interpreter_frame(current); 123 } 124 125 frame& get_frame() { return _last_frame; } 126 }; 127 128 static bool is_resolved(JavaThread* current) { 129 LastFrameAccessor last_frame(current); 130 ConstantPool* constants = last_frame.method()->constants(); 131 Bytecodes::Code bc = last_frame.code(); 132 133 if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w || 134 bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) { 135 bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc); 136 int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc)); 137 constantTag tag = constants->tag_at(index); 138 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name()); 139 return constants->tag_at(index).is_klass(); 140 } else if (bc == Bytecodes::_invokedynamic) { 141 int index = last_frame.get_index_u4(bc); 142 int indy_index = index; 143 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index); 144 return indy_entry->is_resolved(); 145 } else if (Bytecodes::is_invoke(bc)) { 146 int index = last_frame.get_index_u2(bc); 147 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index); 148 return rme->is_resolved(bc); 149 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) { 150 if (bc == Bytecodes::_nofast_getfield) { 151 bc = Bytecodes::_getfield; 152 } else if (bc == Bytecodes::_nofast_putfield) { 153 bc = Bytecodes::_putfield; 154 } 155 int index = last_frame.get_index_u2(bc); 156 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index); 157 return field_entry->is_resolved(bc); 158 } else if (bc == Bytecodes::_new) { 159 int index = last_frame.get_index_u2(bc); 160 constantTag tag = constants->tag_at(index); 161 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name()); 162 return constants->tag_at(index).is_klass(); 163 } 164 return false; 165 } 166 167 static void trace_current_location(JavaThread* current) { 168 LogStreamHandle(Debug, init, interpreter) log; 169 if (current->profile_rt_calls() && log.is_enabled()) { 170 ResourceMark rm(current); 171 LastFrameAccessor last_frame(current); 172 Method* caller = last_frame.method(); 173 ConstantPool* constants = caller->constants(); 174 Bytecodes::Code bc = last_frame.code(); 175 log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT, 176 p2i(current), Bytecodes::name(bc), p2i(caller)); 177 if (caller->is_shared()) { 178 log.print(" shared"); 179 } 180 if (is_resolved(current)) { 181 log.print(" resolved"); 182 } 183 log.print(" "); 184 caller->print_short_name(&log); 185 log.print(" @ %d:", last_frame.bci()); 186 int instruction_size = last_frame.bytecode().instruction_size(); 187 188 if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) { 189 int index = last_frame.get_index_u2(bc); 190 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index); 191 if (rme->is_resolved(bc)) { 192 Method* m = rme->method(); 193 if (m != nullptr) { 194 log.print(" %s", m->method_holder()->init_state_name()); 195 } else { 196 log.print(" null"); 197 } 198 } 199 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) { 200 if (bc == Bytecodes::_nofast_getfield) { 201 bc = Bytecodes::_getfield; 202 } else if (bc == Bytecodes::_nofast_putfield) { 203 bc = Bytecodes::_putfield; 204 } 205 int index = last_frame.get_index_u2(bc); 206 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index); 207 208 if (field_entry->is_resolved(bc)) { 209 log.print(" %s", field_entry->field_holder()->init_state_name()); 210 } 211 } else if (bc == Bytecodes::_new) { 212 int index = last_frame.get_index_u2(bc); 213 constantTag tag = constants->tag_at(index); 214 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name()); 215 if (constants->tag_at(index).is_klass()) { 216 CPKlassSlot kslot = constants->klass_slot_at(index); 217 int resolved_klass_index = kslot.resolved_klass_index(); 218 Klass* k = constants->resolved_klasses()->at(resolved_klass_index); 219 log.print(": %s", InstanceKlass::cast(k)->init_state_name()); 220 } 221 } 222 log.print(" "); 223 caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0); 224 225 LogStreamHandle(Trace, init, interpreter) log1; 226 if (log1.is_enabled()) { 227 if (bc == Bytecodes::_invokedynamic) { 228 int index = last_frame.get_index_u4(bc); 229 int indy_index = index; 230 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index); 231 indy_entry->print_on(&log1); 232 } else if (Bytecodes::is_invoke(bc)) { 233 int index = last_frame.get_index_u2(bc); 234 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index); 235 rme->print_on(&log1); 236 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) { 237 int index = last_frame.get_index_u2(bc); 238 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index); 239 field_entry->print_on(&log1); 240 } 241 } 242 } 243 } 244 245 //------------------------------------------------------------------------------------------------------------------------ 246 // State accessors 247 248 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) { 249 LastFrameAccessor last_frame(current); 250 last_frame.set_bcp(bcp); 251 if (ProfileInterpreter) { 252 // ProfileTraps uses MDOs independently of ProfileInterpreter. 253 // That is why we must check both ProfileInterpreter and mdo != nullptr. 254 MethodData* mdo = last_frame.method()->method_data(); 255 if (mdo != nullptr) { 256 NEEDS_CLEANUP; 257 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci())); 258 } 259 } 260 } 261 262 //------------------------------------------------------------------------------------------------------------------------ 263 // Constants 264 265 266 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide)) 267 // access constant pool 268 LastFrameAccessor last_frame(current); 269 ConstantPool* pool = last_frame.method()->constants(); 270 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc); 271 constantTag tag = pool->tag_at(cp_index); 272 273 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 274 Klass* klass = pool->klass_at(cp_index, CHECK); 275 oop java_class = klass->java_mirror(); 276 current->set_vm_result(java_class); 277 JRT_END 278 279 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) { 280 assert(bytecode == Bytecodes::_ldc || 281 bytecode == Bytecodes::_ldc_w || 282 bytecode == Bytecodes::_ldc2_w || 283 bytecode == Bytecodes::_fast_aldc || 284 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 285 ResourceMark rm(current); 286 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc || 287 bytecode == Bytecodes::_fast_aldc_w); 288 LastFrameAccessor last_frame(current); 289 methodHandle m (current, last_frame.method()); 290 Bytecode_loadconstant ldc(m, last_frame.bci()); 291 292 // Double-check the size. (Condy can have any type.) 293 BasicType type = ldc.result_type(); 294 switch (type2size[type]) { 295 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break; 296 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break; 297 default: ShouldNotReachHere(); 298 } 299 300 // Resolve the constant. This does not do unboxing. 301 // But it does replace Universe::the_null_sentinel by null. 302 oop result = ldc.resolve_constant(CHECK); 303 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc"); 304 305 #ifdef ASSERT 306 { 307 // The bytecode wrappers aren't GC-safe so construct a new one 308 Bytecode_loadconstant ldc2(m, last_frame.bci()); 309 int rindex = ldc2.cache_index(); 310 if (rindex < 0) 311 rindex = m->constants()->cp_to_object_index(ldc2.pool_index()); 312 if (rindex >= 0) { 313 oop coop = m->constants()->resolved_reference_at(rindex); 314 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result); 315 assert(roop == coop, "expected result for assembly code"); 316 } 317 } 318 #endif 319 current->set_vm_result(result); 320 if (!is_fast_aldc) { 321 // Tell the interpreter how to unbox the primitive. 322 guarantee(java_lang_boxing_object::is_instance(result, type), ""); 323 int offset = java_lang_boxing_object::value_offset(type); 324 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift) 325 | (offset & ConstantPoolCache::field_index_mask)); 326 current->set_vm_result_2((Metadata*)flags); 327 } 328 } 329 JRT_END 330 331 332 //------------------------------------------------------------------------------------------------------------------------ 333 // Allocation 334 335 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index)) 336 Klass* k = pool->klass_at(index, CHECK); 337 InstanceKlass* klass = InstanceKlass::cast(k); 338 339 // Make sure we are not instantiating an abstract klass 340 klass->check_valid_for_instantiation(true, CHECK); 341 342 // Make sure klass is initialized 343 klass->initialize(CHECK); 344 345 oop obj = klass->allocate_instance(CHECK); 346 current->set_vm_result(obj); 347 JRT_END 348 349 350 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size)) 351 oop obj = oopFactory::new_typeArray(type, size, CHECK); 352 current->set_vm_result(obj); 353 JRT_END 354 355 356 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size)) 357 Klass* klass = pool->klass_at(index, CHECK); 358 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 359 current->set_vm_result(obj); 360 JRT_END 361 362 363 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address)) 364 // We may want to pass in more arguments - could make this slightly faster 365 LastFrameAccessor last_frame(current); 366 ConstantPool* constants = last_frame.method()->constants(); 367 int i = last_frame.get_index_u2(Bytecodes::_multianewarray); 368 Klass* klass = constants->klass_at(i, CHECK); 369 int nof_dims = last_frame.number_of_dimensions(); 370 assert(klass->is_klass(), "not a class"); 371 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 372 373 // We must create an array of jints to pass to multi_allocate. 374 ResourceMark rm(current); 375 const int small_dims = 10; 376 jint dim_array[small_dims]; 377 jint *dims = &dim_array[0]; 378 if (nof_dims > small_dims) { 379 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 380 } 381 for (int index = 0; index < nof_dims; index++) { 382 // offset from first_size_address is addressed as local[index] 383 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 384 dims[index] = first_size_address[n]; 385 } 386 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 387 current->set_vm_result(obj); 388 JRT_END 389 390 391 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj)) 392 assert(oopDesc::is_oop(obj), "must be a valid oop"); 393 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 394 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 395 JRT_END 396 397 398 // Quicken instance-of and check-cast bytecodes 399 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current)) 400 // Force resolving; quicken the bytecode 401 LastFrameAccessor last_frame(current); 402 int which = last_frame.get_index_u2(Bytecodes::_checkcast); 403 ConstantPool* cpool = last_frame.method()->constants(); 404 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 405 // program we might have seen an unquick'd bytecode in the interpreter but have another 406 // thread quicken the bytecode before we get here. 407 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 408 Klass* klass = cpool->klass_at(which, CHECK); 409 current->set_vm_result_2(klass); 410 JRT_END 411 412 413 //------------------------------------------------------------------------------------------------------------------------ 414 // Exceptions 415 416 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason, 417 const methodHandle& trap_method, int trap_bci) { 418 if (trap_method.not_null()) { 419 MethodData* trap_mdo = trap_method->method_data(); 420 if (trap_mdo == nullptr) { 421 ExceptionMark em(current); 422 JavaThread* THREAD = current; // For exception macros. 423 Method::build_profiling_method_data(trap_method, THREAD); 424 if (HAS_PENDING_EXCEPTION) { 425 // Only metaspace OOM is expected. No Java code executed. 426 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())), 427 "we expect only an OOM error here"); 428 CLEAR_PENDING_EXCEPTION; 429 } 430 trap_mdo = trap_method->method_data(); 431 // and fall through... 432 } 433 if (trap_mdo != nullptr) { 434 // Update per-method count of trap events. The interpreter 435 // is updating the MDO to simulate the effect of compiler traps. 436 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 437 } 438 } 439 } 440 441 // Assume the compiler is (or will be) interested in this event. 442 // If necessary, create an MDO to hold the information, and record it. 443 void InterpreterRuntime::note_trap(JavaThread* current, int reason) { 444 assert(ProfileTraps, "call me only if profiling"); 445 LastFrameAccessor last_frame(current); 446 methodHandle trap_method(current, last_frame.method()); 447 int trap_bci = trap_method->bci_from(last_frame.bcp()); 448 note_trap_inner(current, reason, trap_method, trap_bci); 449 } 450 451 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 452 // get klass 453 InstanceKlass* klass = InstanceKlass::cast(k); 454 assert(klass->is_initialized(), 455 "this klass should have been initialized during VM initialization"); 456 // create instance - do not call constructor since we may have no 457 // (java) stack space left (should assert constructor is empty) 458 Handle exception; 459 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 460 exception = Handle(THREAD, exception_oop); 461 if (StackTraceInThrowable) { 462 java_lang_Throwable::fill_in_stack_trace(exception); 463 } 464 return exception; 465 } 466 467 // Special handling for stack overflow: since we don't have any (java) stack 468 // space left we use the pre-allocated & pre-initialized StackOverflowError 469 // klass to create an stack overflow error instance. We do not call its 470 // constructor for the same reason (it is empty, anyway). 471 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError, 472 InterpreterRuntime::throw_StackOverflowError(JavaThread* current)) 473 Handle exception = get_preinitialized_exception( 474 vmClasses::StackOverflowError_klass(), 475 CHECK); 476 // Increment counter for hs_err file reporting 477 Atomic::inc(&Exceptions::_stack_overflow_errors); 478 // Remove the ScopedValue bindings in case we got a StackOverflowError 479 // while we were trying to manipulate ScopedValue bindings. 480 current->clear_scopedValueBindings(); 481 THROW_HANDLE(exception); 482 JRT_END 483 484 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError, 485 InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current)) 486 Handle exception = get_preinitialized_exception( 487 vmClasses::StackOverflowError_klass(), 488 CHECK); 489 java_lang_Throwable::set_message(exception(), 490 Universe::delayed_stack_overflow_error_message()); 491 // Increment counter for hs_err file reporting 492 Atomic::inc(&Exceptions::_stack_overflow_errors); 493 // Remove the ScopedValue bindings in case we got a StackOverflowError 494 // while we were trying to manipulate ScopedValue bindings. 495 current->clear_scopedValueBindings(); 496 THROW_HANDLE(exception); 497 JRT_END 498 499 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception, 500 InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message)) 501 // lookup exception klass 502 TempNewSymbol s = SymbolTable::new_symbol(name); 503 if (ProfileTraps) { 504 if (s == vmSymbols::java_lang_ArithmeticException()) { 505 note_trap(current, Deoptimization::Reason_div0_check); 506 } else if (s == vmSymbols::java_lang_NullPointerException()) { 507 note_trap(current, Deoptimization::Reason_null_check); 508 } 509 } 510 // create exception 511 Handle exception = Exceptions::new_exception(current, s, message); 512 current->set_vm_result(exception()); 513 JRT_END 514 515 516 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception, 517 InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj)) 518 // Produce the error message first because note_trap can safepoint 519 ResourceMark rm(current); 520 const char* klass_name = obj->klass()->external_name(); 521 // lookup exception klass 522 TempNewSymbol s = SymbolTable::new_symbol(name); 523 if (ProfileTraps) { 524 if (s == vmSymbols::java_lang_ArrayStoreException()) { 525 note_trap(current, Deoptimization::Reason_array_check); 526 } else { 527 note_trap(current, Deoptimization::Reason_class_check); 528 } 529 } 530 // create exception, with klass name as detail message 531 Handle exception = Exceptions::new_exception(current, s, klass_name); 532 current->set_vm_result(exception()); 533 JRT_END 534 535 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException, 536 InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index)) 537 // Produce the error message first because note_trap can safepoint 538 ResourceMark rm(current); 539 stringStream ss; 540 ss.print("Index %d out of bounds for length %d", index, a->length()); 541 542 if (ProfileTraps) { 543 note_trap(current, Deoptimization::Reason_range_check); 544 } 545 546 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 547 JRT_END 548 549 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException, 550 InterpreterRuntime::throw_ClassCastException( 551 JavaThread* current, oopDesc* obj)) 552 553 // Produce the error message first because note_trap can safepoint 554 ResourceMark rm(current); 555 char* message = SharedRuntime::generate_class_cast_message( 556 current, obj->klass()); 557 558 if (ProfileTraps) { 559 note_trap(current, Deoptimization::Reason_class_check); 560 } 561 562 // create exception 563 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 564 JRT_END 565 566 // exception_handler_for_exception(...) returns the continuation address, 567 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 568 // The exception oop is returned to make sure it is preserved over GC (it 569 // is only on the stack if the exception was thrown explicitly via athrow). 570 // During this operation, the expression stack contains the values for the 571 // bci where the exception happened. If the exception was propagated back 572 // from a call, the expression stack contains the values for the bci at the 573 // invoke w/o arguments (i.e., as if one were inside the call). 574 // Note that the implementation of this method assumes it's only called when an exception has actually occured 575 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception, 576 InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception)) 577 // We get here after we have unwound from a callee throwing an exception 578 // into the interpreter. Any deferred stack processing is notified of 579 // the event via the StackWatermarkSet. 580 StackWatermarkSet::after_unwind(current); 581 582 LastFrameAccessor last_frame(current); 583 Handle h_exception(current, exception); 584 methodHandle h_method (current, last_frame.method()); 585 constantPoolHandle h_constants(current, h_method->constants()); 586 bool should_repeat; 587 int handler_bci; 588 int current_bci = last_frame.bci(); 589 590 if (current->frames_to_pop_failed_realloc() > 0) { 591 // Allocation of scalar replaced object used in this frame 592 // failed. Unconditionally pop the frame. 593 current->dec_frames_to_pop_failed_realloc(); 594 current->set_vm_result(h_exception()); 595 // If the method is synchronized we already unlocked the monitor 596 // during deoptimization so the interpreter needs to skip it when 597 // the frame is popped. 598 current->set_do_not_unlock_if_synchronized(true); 599 return Interpreter::remove_activation_entry(); 600 } 601 602 // Need to do this check first since when _do_not_unlock_if_synchronized 603 // is set, we don't want to trigger any classloading which may make calls 604 // into java, or surprisingly find a matching exception handler for bci 0 605 // since at this moment the method hasn't been "officially" entered yet. 606 if (current->do_not_unlock_if_synchronized()) { 607 ResourceMark rm; 608 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 609 current->set_vm_result(exception); 610 return Interpreter::remove_activation_entry(); 611 } 612 613 do { 614 should_repeat = false; 615 616 // assertions 617 assert(h_exception.not_null(), "null exceptions should be handled by athrow"); 618 // Check that exception is a subclass of Throwable. 619 assert(h_exception->is_a(vmClasses::Throwable_klass()), 620 "Exception not subclass of Throwable"); 621 622 // tracing 623 if (log_is_enabled(Info, exceptions)) { 624 ResourceMark rm(current); 625 stringStream tempst; 626 tempst.print("interpreter method <%s>\n" 627 " at bci %d for thread " INTPTR_FORMAT " (%s)", 628 h_method->print_value_string(), current_bci, p2i(current), current->name()); 629 Exceptions::log_exception(h_exception, tempst.as_string()); 630 } 631 // Don't go paging in something which won't be used. 632 // else if (extable->length() == 0) { 633 // // disabled for now - interpreter is not using shortcut yet 634 // // (shortcut is not to call runtime if we have no exception handlers) 635 // // warning("performance bug: should not call runtime if method has no exception handlers"); 636 // } 637 // for AbortVMOnException flag 638 Exceptions::debug_check_abort(h_exception); 639 640 // exception handler lookup 641 Klass* klass = h_exception->klass(); 642 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD); 643 if (HAS_PENDING_EXCEPTION) { 644 // We threw an exception while trying to find the exception handler. 645 // Transfer the new exception to the exception handle which will 646 // be set into thread local storage, and do another lookup for an 647 // exception handler for this exception, this time starting at the 648 // BCI of the exception handler which caused the exception to be 649 // thrown (bug 4307310). 650 h_exception = Handle(THREAD, PENDING_EXCEPTION); 651 CLEAR_PENDING_EXCEPTION; 652 if (handler_bci >= 0) { 653 current_bci = handler_bci; 654 should_repeat = true; 655 } 656 } 657 } while (should_repeat == true); 658 659 #if INCLUDE_JVMCI 660 if (EnableJVMCI && h_method->method_data() != nullptr) { 661 ResourceMark rm(current); 662 MethodData* mdo = h_method->method_data(); 663 664 // Lock to read ProfileData, and ensure lock is not broken by a safepoint 665 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag); 666 667 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr); 668 if (pdata != nullptr && pdata->is_BitData()) { 669 BitData* bit_data = (BitData*) pdata; 670 bit_data->set_exception_seen(); 671 } 672 } 673 #endif 674 675 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 676 // time throw or a stack unwinding throw and accordingly notify the debugger 677 if (JvmtiExport::can_post_on_exceptions()) { 678 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception()); 679 } 680 681 address continuation = nullptr; 682 address handler_pc = nullptr; 683 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) { 684 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 685 // handler in this method, or (b) after a stack overflow there is not yet 686 // enough stack space available to reprotect the stack. 687 continuation = Interpreter::remove_activation_entry(); 688 #if COMPILER2_OR_JVMCI 689 // Count this for compilation purposes 690 h_method->interpreter_throwout_increment(THREAD); 691 #endif 692 } else { 693 // handler in this method => change bci/bcp to handler bci/bcp and continue there 694 handler_pc = h_method->code_base() + handler_bci; 695 h_method->set_exception_handler_entered(handler_bci); // profiling 696 #ifndef ZERO 697 set_bcp_and_mdp(handler_pc, current); 698 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 699 #else 700 continuation = (address)(intptr_t) handler_bci; 701 #endif 702 } 703 704 // notify debugger of an exception catch 705 // (this is good for exceptions caught in native methods as well) 706 if (JvmtiExport::can_post_on_exceptions()) { 707 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr)); 708 } 709 710 current->set_vm_result(h_exception()); 711 return continuation; 712 JRT_END 713 714 715 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current)) 716 assert(current->has_pending_exception(), "must only be called if there's an exception pending"); 717 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 718 JRT_END 719 720 721 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current)) 722 THROW(vmSymbols::java_lang_AbstractMethodError()); 723 JRT_END 724 725 // This method is called from the "abstract_entry" of the interpreter. 726 // At that point, the arguments have already been removed from the stack 727 // and therefore we don't have the receiver object at our fingertips. (Though, 728 // on some platforms the receiver still resides in a register...). Thus, 729 // we have no choice but print an error message not containing the receiver 730 // type. 731 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod, 732 InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current, 733 Method* missingMethod)) 734 ResourceMark rm(current); 735 assert(missingMethod != nullptr, "sanity"); 736 methodHandle m(current, missingMethod); 737 LinkResolver::throw_abstract_method_error(m, THREAD); 738 JRT_END 739 740 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose, 741 InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current, 742 Klass* recvKlass, 743 Method* missingMethod)) 744 ResourceMark rm(current); 745 methodHandle mh = methodHandle(current, missingMethod); 746 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD); 747 JRT_END 748 749 750 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError, 751 InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current)) 752 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 753 JRT_END 754 755 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose, 756 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current, 757 Klass* recvKlass, 758 Klass* interfaceKlass)) 759 ResourceMark rm(current); 760 char buf[1000]; 761 buf[0] = '\0'; 762 jio_snprintf(buf, sizeof(buf), 763 "Class %s does not implement the requested interface %s", 764 recvKlass ? recvKlass->external_name() : "nullptr", 765 interfaceKlass ? interfaceKlass->external_name() : "nullptr"); 766 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 767 JRT_END 768 769 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException, 770 InterpreterRuntime::throw_NullPointerException(JavaThread* current)) 771 THROW(vmSymbols::java_lang_NullPointerException()); 772 JRT_END 773 774 //------------------------------------------------------------------------------------------------------------------------ 775 // Fields 776 // 777 778 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current)) 779 resolve_get_put(current, Bytecodes::_getfield); 780 PROF_END 781 782 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current)) 783 resolve_get_put(current, Bytecodes::_putfield); 784 PROF_END 785 786 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current)) 787 resolve_get_put(current, Bytecodes::_getstatic); 788 PROF_END 789 790 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current)) 791 resolve_get_put(current, Bytecodes::_putstatic); 792 PROF_END 793 794 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) { 795 LastFrameAccessor last_frame(current); 796 constantPoolHandle pool(current, last_frame.method()->constants()); 797 methodHandle m(current, last_frame.method()); 798 799 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current); 800 } 801 802 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index, 803 methodHandle& m, 804 constantPoolHandle& pool, 805 bool initialize_holder, TRAPS) { 806 fieldDescriptor info; 807 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 808 bytecode == Bytecodes::_putstatic); 809 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 810 811 { 812 JvmtiHideSingleStepping jhss(THREAD); 813 LinkResolver::resolve_field_access(info, pool, field_index, 814 m, bytecode, initialize_holder, CHECK); 815 } // end JvmtiHideSingleStepping 816 817 // check if link resolution caused cpCache to be updated 818 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return; 819 820 // compute auxiliary field attributes 821 TosState state = as_TosState(info.field_type()); 822 823 // Resolution of put instructions on final fields is delayed. That is required so that 824 // exceptions are thrown at the correct place (when the instruction is actually invoked). 825 // If we do not resolve an instruction in the current pass, leaving the put_code 826 // set to zero will cause the next put instruction to the same field to reresolve. 827 828 // Resolution of put instructions to final instance fields with invalid updates (i.e., 829 // to final instance fields with updates originating from a method different than <init>) 830 // is inhibited. A putfield instruction targeting an instance final field must throw 831 // an IllegalAccessError if the instruction is not in an instance 832 // initializer method <init>. If resolution were not inhibited, a putfield 833 // in an initializer method could be resolved in the initializer. Subsequent 834 // putfield instructions to the same field would then use cached information. 835 // As a result, those instructions would not pass through the VM. That is, 836 // checks in resolve_field_access() would not be executed for those instructions 837 // and the required IllegalAccessError would not be thrown. 838 // 839 // Also, we need to delay resolving getstatic and putstatic instructions until the 840 // class is initialized. This is required so that access to the static 841 // field will call the initialization function every time until the class 842 // is completely initialized ala. in 2.17.5 in JVM Specification. 843 InstanceKlass* klass = info.field_holder(); 844 bool uninitialized_static = is_static && !klass->is_initialized(); 845 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 846 info.has_initialized_final_update(); 847 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); 848 849 Bytecodes::Code get_code = (Bytecodes::Code)0; 850 Bytecodes::Code put_code = (Bytecodes::Code)0; 851 if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) { 852 #if !defined(X86) && !defined(AARCH64) 853 guarantee(!uninitialized_static, "fast class init checks missing in interpreter"); // FIXME 854 #endif // !X86 && !AARCH64 855 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 856 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 857 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 858 } 859 } 860 861 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index); 862 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile()); 863 entry->fill_in(info.field_holder(), info.offset(), 864 checked_cast<u2>(info.index()), checked_cast<u1>(state), 865 static_cast<u1>(get_code), static_cast<u1>(put_code)); 866 } 867 868 869 //------------------------------------------------------------------------------------------------------------------------ 870 // Synchronization 871 // 872 // The interpreter's synchronization code is factored out so that it can 873 // be shared by method invocation and synchronized blocks. 874 //%note synchronization_3 875 876 //%note monitor_1 877 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem)) 878 assert(LockingMode != LM_LIGHTWEIGHT, "Should call monitorenter_obj() when using the new lightweight locking"); 879 #ifdef ASSERT 880 current->last_frame().interpreter_frame_verify_monitor(elem); 881 #endif 882 Handle h_obj(current, elem->obj()); 883 assert(Universe::heap()->is_in_or_null(h_obj()), 884 "must be null or an object"); 885 ObjectSynchronizer::enter(h_obj, elem->lock(), current); 886 assert(Universe::heap()->is_in_or_null(elem->obj()), 887 "must be null or an object"); 888 #ifdef ASSERT 889 current->last_frame().interpreter_frame_verify_monitor(elem); 890 #endif 891 JRT_END 892 893 // NOTE: We provide a separate implementation for the new lightweight locking to workaround a limitation 894 // of registers in x86_32. This entry point accepts an oop instead of a BasicObjectLock*. 895 // The problem is that we would need to preserve the register that holds the BasicObjectLock, 896 // but we are using that register to hold the thread. We don't have enough registers to 897 // also keep the BasicObjectLock, but we don't really need it anyway, we only need 898 // the object. See also InterpreterMacroAssembler::lock_object(). 899 // As soon as legacy stack-locking goes away we could remove the other monitorenter() entry 900 // point, and only use oop-accepting entries (same for monitorexit() below). 901 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter_obj, InterpreterRuntime::monitorenter_obj(JavaThread* current, oopDesc* obj)) 902 assert(LockingMode == LM_LIGHTWEIGHT, "Should call monitorenter() when not using the new lightweight locking"); 903 Handle h_obj(current, cast_to_oop(obj)); 904 assert(Universe::heap()->is_in_or_null(h_obj()), 905 "must be null or an object"); 906 ObjectSynchronizer::enter(h_obj, nullptr, current); 907 return; 908 JRT_END 909 910 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem)) 911 oop obj = elem->obj(); 912 assert(Universe::heap()->is_in(obj), "must be an object"); 913 // The object could become unlocked through a JNI call, which we have no other checks for. 914 // Give a fatal message if CheckJNICalls. Otherwise we ignore it. 915 if (obj->is_unlocked()) { 916 if (CheckJNICalls) { 917 fatal("Object has been unlocked by JNI"); 918 } 919 return; 920 } 921 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current()); 922 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor 923 // again at method exit or in the case of an exception. 924 elem->set_obj(nullptr); 925 JRT_END 926 927 928 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception, 929 InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current)) 930 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 931 JRT_END 932 933 934 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception, 935 InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current)) 936 // Returns an illegal exception to install into the current thread. The 937 // pending_exception flag is cleared so normal exception handling does not 938 // trigger. Any current installed exception will be overwritten. This 939 // method will be called during an exception unwind. 940 941 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 942 Handle exception(current, current->vm_result()); 943 assert(exception() != nullptr, "vm result should be set"); 944 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures) 945 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH); 946 current->set_vm_result(exception()); 947 JRT_END 948 949 950 //------------------------------------------------------------------------------------------------------------------------ 951 // Invokes 952 953 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp)) 954 return method->orig_bytecode_at(method->bci_from(bcp)); 955 JRT_END 956 957 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code)) 958 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 959 JRT_END 960 961 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp)) 962 JvmtiExport::post_raw_breakpoint(current, method, bcp); 963 JRT_END 964 965 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current)) 966 resolve_invoke(current, Bytecodes::_invokevirtual); 967 PROF_END 968 969 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current)) 970 resolve_invoke(current, Bytecodes::_invokespecial); 971 PROF_END 972 973 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current)) 974 resolve_invoke(current, Bytecodes::_invokestatic); 975 PROF_END 976 977 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current)) 978 resolve_invoke(current, Bytecodes::_invokeinterface); 979 PROF_END 980 981 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) { 982 LastFrameAccessor last_frame(current); 983 // extract receiver from the outgoing argument list if necessary 984 Handle receiver(current, nullptr); 985 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 986 bytecode == Bytecodes::_invokespecial) { 987 ResourceMark rm(current); 988 methodHandle m (current, last_frame.method()); 989 Bytecode_invoke call(m, last_frame.bci()); 990 Symbol* signature = call.signature(); 991 receiver = Handle(current, last_frame.callee_receiver(signature)); 992 993 assert(Universe::heap()->is_in_or_null(receiver()), 994 "sanity check"); 995 assert(receiver.is_null() || 996 !Universe::heap()->is_in(receiver->klass()), 997 "sanity check"); 998 } 999 1000 // resolve method 1001 CallInfo info; 1002 constantPoolHandle pool(current, last_frame.method()->constants()); 1003 1004 methodHandle resolved_method; 1005 1006 int method_index = last_frame.get_index_u2(bytecode); 1007 { 1008 JvmtiHideSingleStepping jhss(current); 1009 JavaThread* THREAD = current; // For exception macros. 1010 LinkResolver::resolve_invoke(info, receiver, pool, 1011 method_index, bytecode, 1012 THREAD); 1013 1014 if (HAS_PENDING_EXCEPTION) { 1015 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) { 1016 // Preserve the original exception across the call to note_trap() 1017 PreserveExceptionMark pm(current); 1018 // Recording the trap will help the compiler to potentially recognize this exception as "hot" 1019 note_trap(current, Deoptimization::Reason_null_check); 1020 } 1021 return; 1022 } 1023 1024 resolved_method = methodHandle(current, info.resolved_method()); 1025 } // end JvmtiHideSingleStepping 1026 1027 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index); 1028 } 1029 1030 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode, 1031 methodHandle& resolved_method, 1032 constantPoolHandle& pool, 1033 int method_index) { 1034 // Don't allow safepoints until the method is cached. 1035 NoSafepointVerifier nsv; 1036 1037 // check if link resolution caused cpCache to be updated 1038 ConstantPoolCache* cache = pool->cache(); 1039 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return; 1040 1041 #ifdef ASSERT 1042 if (bytecode == Bytecodes::_invokeinterface) { 1043 if (resolved_method->method_holder() == vmClasses::Object_klass()) { 1044 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 1045 // (see also CallInfo::set_interface for details) 1046 assert(info.call_kind() == CallInfo::vtable_call || 1047 info.call_kind() == CallInfo::direct_call, ""); 1048 assert(resolved_method->is_final() || info.has_vtable_index(), 1049 "should have been set already"); 1050 } else if (!resolved_method->has_itable_index()) { 1051 // Resolved something like CharSequence.toString. Use vtable not itable. 1052 assert(info.call_kind() != CallInfo::itable_call, ""); 1053 } else { 1054 // Setup itable entry 1055 assert(info.call_kind() == CallInfo::itable_call, ""); 1056 int index = resolved_method->itable_index(); 1057 assert(info.itable_index() == index, ""); 1058 } 1059 } else if (bytecode == Bytecodes::_invokespecial) { 1060 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 1061 } else { 1062 assert(info.call_kind() == CallInfo::direct_call || 1063 info.call_kind() == CallInfo::vtable_call, ""); 1064 } 1065 #endif 1066 // Get sender and only set cpCache entry to resolved if it is not an 1067 // interface. The receiver for invokespecial calls within interface 1068 // methods must be checked for every call. 1069 InstanceKlass* sender = pool->pool_holder(); 1070 1071 switch (info.call_kind()) { 1072 case CallInfo::direct_call: 1073 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface()); 1074 break; 1075 case CallInfo::vtable_call: 1076 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index()); 1077 break; 1078 case CallInfo::itable_call: 1079 cache->set_itable_call( 1080 bytecode, 1081 method_index, 1082 info.resolved_klass(), 1083 resolved_method, 1084 info.itable_index()); 1085 break; 1086 default: ShouldNotReachHere(); 1087 } 1088 } 1089 1090 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index, 1091 constantPoolHandle& pool, TRAPS) { 1092 LinkInfo link_info(pool, method_index, bytecode, CHECK); 1093 1094 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) { 1095 CallInfo call_info; 1096 switch (bytecode) { 1097 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break; 1098 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break; 1099 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break; 1100 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break; 1101 1102 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode)); 1103 } 1104 methodHandle resolved_method(THREAD, call_info.resolved_method()); 1105 guarantee(resolved_method->method_holder()->is_linked(), ""); 1106 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index); 1107 } else { 1108 // FIXME: why a shared class is not linked yet? 1109 // Can't link it here since there are no guarantees it'll be prelinked on the next run. 1110 ResourceMark rm; 1111 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass()); 1112 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s", 1113 resolved_iklass->is_shared() ? "is_shared" : "", 1114 resolved_iklass->init_state_name(), 1115 resolved_iklass->external_name()); 1116 } 1117 } 1118 1119 // First time execution: Resolve symbols, create a permanent MethodType object. 1120 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current)) 1121 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 1122 LastFrameAccessor last_frame(current); 1123 1124 // resolve method 1125 CallInfo info; 1126 constantPoolHandle pool(current, last_frame.method()->constants()); 1127 int method_index = last_frame.get_index_u2(bytecode); 1128 { 1129 JvmtiHideSingleStepping jhss(current); 1130 JavaThread* THREAD = current; // For exception macros. 1131 LinkResolver::resolve_invoke(info, Handle(), pool, 1132 method_index, bytecode, 1133 CHECK); 1134 } // end JvmtiHideSingleStepping 1135 1136 pool->cache()->set_method_handle(method_index, info); 1137 PROF_END 1138 1139 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index, 1140 constantPoolHandle& pool, TRAPS) { 1141 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 1142 CallInfo info; 1143 LinkResolver::resolve_invoke(info, Handle(), pool, 1144 raw_index, bytecode, CHECK); 1145 1146 pool->cache()->set_method_handle(raw_index, info); 1147 } 1148 1149 // First time execution: Resolve symbols, create a permanent CallSite object. 1150 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current)) 1151 LastFrameAccessor last_frame(current); 1152 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 1153 1154 // resolve method 1155 CallInfo info; 1156 constantPoolHandle pool(current, last_frame.method()->constants()); 1157 int index = last_frame.get_index_u4(bytecode); 1158 { 1159 JvmtiHideSingleStepping jhss(current); 1160 JavaThread* THREAD = current; // For exception macros. 1161 LinkResolver::resolve_invoke(info, Handle(), pool, 1162 index, bytecode, CHECK); 1163 } // end JvmtiHideSingleStepping 1164 1165 pool->cache()->set_dynamic_call(info, index); 1166 PROF_END 1167 1168 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index, 1169 constantPoolHandle& pool, TRAPS) { 1170 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 1171 CallInfo info; 1172 LinkResolver::resolve_invoke(info, Handle(), pool, 1173 raw_index, bytecode, CHECK); 1174 pool->cache()->set_dynamic_call(info, raw_index); 1175 } 1176 1177 // This function is the interface to the assembly code. It returns the resolved 1178 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 1179 // This function will check for redefinition! 1180 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) { 1181 trace_current_location(current); 1182 1183 switch (bytecode) { 1184 case Bytecodes::_getstatic: resolve_getstatic(current); break; 1185 case Bytecodes::_putstatic: resolve_putstatic(current); break; 1186 case Bytecodes::_getfield: resolve_getfield(current); break; 1187 case Bytecodes::_putfield: resolve_putfield(current); break; 1188 1189 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break; 1190 case Bytecodes::_invokespecial: resolve_invokespecial(current); break; 1191 case Bytecodes::_invokestatic: resolve_invokestatic(current); break; 1192 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break; 1193 case Bytecodes::_invokehandle: resolve_invokehandle(current); break; 1194 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break; 1195 1196 default: 1197 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 1198 break; 1199 } 1200 } 1201 JRT_END 1202 1203 //------------------------------------------------------------------------------------------------------------------------ 1204 // Miscellaneous 1205 1206 1207 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) { 1208 // Enable WXWrite: the function is called directly by interpreter. 1209 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current)); 1210 1211 // frequency_counter_overflow_inner can throw async exception. 1212 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp); 1213 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests"); 1214 if (branch_bcp != nullptr && nm != nullptr) { 1215 // This was a successful request for an OSR nmethod. Because 1216 // frequency_counter_overflow_inner ends with a safepoint check, 1217 // nm could have been unloaded so look it up again. It's unsafe 1218 // to examine nm directly since it might have been freed and used 1219 // for something else. 1220 LastFrameAccessor last_frame(current); 1221 Method* method = last_frame.method(); 1222 int bci = method->bci_from(last_frame.bcp()); 1223 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 1224 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1225 if (nm != nullptr && bs_nm != nullptr) { 1226 // in case the transition passed a safepoint we need to barrier this again 1227 if (!bs_nm->nmethod_osr_entry_barrier(nm)) { 1228 nm = nullptr; 1229 } 1230 } 1231 } 1232 if (nm != nullptr && current->is_interp_only_mode()) { 1233 // Normally we never get an nm if is_interp_only_mode() is true, because 1234 // policy()->event has a check for this and won't compile the method when 1235 // true. However, it's possible for is_interp_only_mode() to become true 1236 // during the compilation. We don't want to return the nm in that case 1237 // because we want to continue to execute interpreted. 1238 nm = nullptr; 1239 } 1240 #ifndef PRODUCT 1241 if (TraceOnStackReplacement) { 1242 if (nm != nullptr) { 1243 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 1244 nm->print(); 1245 } 1246 } 1247 #endif 1248 return nm; 1249 } 1250 1251 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow, 1252 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp)) 1253 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1254 // flag, in case this method triggers classloading which will call into Java. 1255 UnlockFlagSaver fs(current); 1256 1257 LastFrameAccessor last_frame(current); 1258 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1259 methodHandle method(current, last_frame.method()); 1260 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci; 1261 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci; 1262 1263 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL); 1264 1265 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1266 if (osr_nm != nullptr && bs_nm != nullptr) { 1267 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) { 1268 osr_nm = nullptr; 1269 } 1270 } 1271 return osr_nm; 1272 JRT_END 1273 1274 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 1275 assert(ProfileInterpreter, "must be profiling interpreter"); 1276 int bci = method->bci_from(cur_bcp); 1277 MethodData* mdo = method->method_data(); 1278 if (mdo == nullptr) return 0; 1279 return mdo->bci_to_di(bci); 1280 JRT_END 1281 1282 #ifdef ASSERT 1283 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 1284 assert(ProfileInterpreter, "must be profiling interpreter"); 1285 1286 MethodData* mdo = method->method_data(); 1287 assert(mdo != nullptr, "must not be null"); 1288 1289 int bci = method->bci_from(bcp); 1290 1291 address mdp2 = mdo->bci_to_dp(bci); 1292 if (mdp != mdp2) { 1293 ResourceMark rm; 1294 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1295 int current_di = mdo->dp_to_di(mdp); 1296 int expected_di = mdo->dp_to_di(mdp2); 1297 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1298 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1299 int approx_bci = -1; 1300 if (current_di >= 0) { 1301 approx_bci = mdo->data_at(current_di)->bci(); 1302 } 1303 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1304 mdo->print_on(tty); 1305 method->print_codes(); 1306 } 1307 assert(mdp == mdp2, "wrong mdp"); 1308 JRT_END 1309 #endif // ASSERT 1310 1311 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci)) 1312 assert(ProfileInterpreter, "must be profiling interpreter"); 1313 ResourceMark rm(current); 1314 LastFrameAccessor last_frame(current); 1315 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1316 MethodData* h_mdo = last_frame.method()->method_data(); 1317 1318 // Grab a lock to ensure atomic access to setting the return bci and 1319 // the displacement. This can block and GC, invalidating all naked oops. 1320 MutexLocker ml(RetData_lock); 1321 1322 // ProfileData is essentially a wrapper around a derived oop, so we 1323 // need to take the lock before making any ProfileData structures. 1324 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp())); 1325 guarantee(data != nullptr, "profile data must be valid"); 1326 RetData* rdata = data->as_RetData(); 1327 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1328 last_frame.set_mdp(new_mdp); 1329 JRT_END 1330 1331 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m)) 1332 return Method::build_method_counters(current, m); 1333 JRT_END 1334 1335 1336 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current)) 1337 // We used to need an explicit preserve_arguments here for invoke bytecodes. However, 1338 // stack traversal automatically takes care of preserving arguments for invoke, so 1339 // this is no longer needed. 1340 1341 // JRT_END does an implicit safepoint check, hence we are guaranteed to block 1342 // if this is called during a safepoint 1343 1344 if (JvmtiExport::should_post_single_step()) { 1345 // This function is called by the interpreter when single stepping. Such single 1346 // stepping could unwind a frame. Then, it is important that we process any frames 1347 // that we might return into. 1348 StackWatermarkSet::before_unwind(current); 1349 1350 // We are called during regular safepoints and when the VM is 1351 // single stepping. If any thread is marked for single stepping, 1352 // then we may have JVMTI work to do. 1353 LastFrameAccessor last_frame(current); 1354 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp()); 1355 } 1356 JRT_END 1357 1358 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current)) 1359 assert(current == JavaThread::current(), "pre-condition"); 1360 // This function is called by the interpreter when the return poll found a reason 1361 // to call the VM. The reason could be that we are returning into a not yet safe 1362 // to access frame. We handle that below. 1363 // Note that this path does not check for single stepping, because we do not want 1364 // to single step when unwinding frames for an exception being thrown. Instead, 1365 // such single stepping code will use the safepoint table, which will use the 1366 // InterpreterRuntime::at_safepoint callback. 1367 StackWatermarkSet::before_unwind(current); 1368 JRT_END 1369 1370 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj, 1371 ResolvedFieldEntry *entry)) 1372 1373 // check the access_flags for the field in the klass 1374 1375 InstanceKlass* ik = entry->field_holder(); 1376 int index = entry->field_index(); 1377 if (!ik->field_status(index).is_access_watched()) return; 1378 1379 bool is_static = (obj == nullptr); 1380 HandleMark hm(current); 1381 1382 Handle h_obj; 1383 if (!is_static) { 1384 // non-static field accessors have an object, but we need a handle 1385 h_obj = Handle(current, obj); 1386 } 1387 InstanceKlass* field_holder = entry->field_holder(); // HERE 1388 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static); 1389 LastFrameAccessor last_frame(current); 1390 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid); 1391 JRT_END 1392 1393 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj, 1394 ResolvedFieldEntry *entry, jvalue *value)) 1395 1396 InstanceKlass* ik = entry->field_holder(); 1397 1398 // check the access_flags for the field in the klass 1399 int index = entry->field_index(); 1400 // bail out if field modifications are not watched 1401 if (!ik->field_status(index).is_modification_watched()) return; 1402 1403 char sig_type = '\0'; 1404 1405 switch((TosState)entry->tos_state()) { 1406 case btos: sig_type = JVM_SIGNATURE_BYTE; break; 1407 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break; 1408 case ctos: sig_type = JVM_SIGNATURE_CHAR; break; 1409 case stos: sig_type = JVM_SIGNATURE_SHORT; break; 1410 case itos: sig_type = JVM_SIGNATURE_INT; break; 1411 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break; 1412 case atos: sig_type = JVM_SIGNATURE_CLASS; break; 1413 case ltos: sig_type = JVM_SIGNATURE_LONG; break; 1414 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break; 1415 default: ShouldNotReachHere(); return; 1416 } 1417 bool is_static = (obj == nullptr); 1418 1419 HandleMark hm(current); 1420 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static); 1421 jvalue fvalue; 1422 #ifdef _LP64 1423 fvalue = *value; 1424 #else 1425 // Long/double values are stored unaligned and also noncontiguously with 1426 // tagged stacks. We can't just do a simple assignment even in the non- 1427 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1428 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1429 // We assume that the two halves of longs/doubles are stored in interpreter 1430 // stack slots in platform-endian order. 1431 jlong_accessor u; 1432 jint* newval = (jint*)value; 1433 u.words[0] = newval[0]; 1434 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1435 fvalue.j = u.long_value; 1436 #endif // _LP64 1437 1438 Handle h_obj; 1439 if (!is_static) { 1440 // non-static field accessors have an object, but we need a handle 1441 h_obj = Handle(current, obj); 1442 } 1443 1444 LastFrameAccessor last_frame(current); 1445 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj, 1446 fid, sig_type, &fvalue); 1447 JRT_END 1448 1449 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current)) 1450 LastFrameAccessor last_frame(current); 1451 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame()); 1452 JRT_END 1453 1454 1455 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop 1456 // before transitioning to VM, and restore it after transitioning back 1457 // to Java. The return oop at the top-of-stack, is not walked by the GC. 1458 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current)) 1459 LastFrameAccessor last_frame(current); 1460 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame()); 1461 JRT_END 1462 1463 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc)) 1464 { 1465 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0); 1466 } 1467 JRT_END 1468 1469 1470 // Implementation of SignatureHandlerLibrary 1471 1472 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1473 // Dummy definition (else normalization method is defined in CPU 1474 // dependent code) 1475 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1476 return fingerprint; 1477 } 1478 #endif 1479 1480 address SignatureHandlerLibrary::set_handler_blob() { 1481 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1482 if (handler_blob == nullptr) { 1483 return nullptr; 1484 } 1485 address handler = handler_blob->code_begin(); 1486 _handler_blob = handler_blob; 1487 _handler = handler; 1488 return handler; 1489 } 1490 1491 void SignatureHandlerLibrary::initialize() { 1492 if (_fingerprints != nullptr) { 1493 return; 1494 } 1495 if (set_handler_blob() == nullptr) { 1496 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1497 } 1498 1499 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1500 SignatureHandlerLibrary::buffer_size); 1501 _buffer = bb->code_begin(); 1502 1503 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode); 1504 _handlers = new (mtCode) GrowableArray<address>(32, mtCode); 1505 } 1506 1507 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1508 address handler = _handler; 1509 int insts_size = buffer->pure_insts_size(); 1510 if (handler + insts_size > _handler_blob->code_end()) { 1511 // get a new handler blob 1512 handler = set_handler_blob(); 1513 } 1514 if (handler != nullptr) { 1515 memcpy(handler, buffer->insts_begin(), insts_size); 1516 pd_set_handler(handler); 1517 ICache::invalidate_range(handler, insts_size); 1518 _handler = handler + insts_size; 1519 } 1520 return handler; 1521 } 1522 1523 void SignatureHandlerLibrary::add(const methodHandle& method) { 1524 if (method->signature_handler() == nullptr) { 1525 // use slow signature handler if we can't do better 1526 int handler_index = -1; 1527 // check if we can use customized (fast) signature handler 1528 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) { 1529 // use customized signature handler 1530 MutexLocker mu(SignatureHandlerLibrary_lock); 1531 // make sure data structure is initialized 1532 initialize(); 1533 // lookup method signature's fingerprint 1534 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1535 // allow CPU dependent code to optimize the fingerprints for the fast handler 1536 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1537 handler_index = _fingerprints->find(fingerprint); 1538 // create handler if necessary 1539 if (handler_index < 0) { 1540 ResourceMark rm; 1541 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer; 1542 CodeBuffer buffer((address)(_buffer + align_offset), 1543 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset)); 1544 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1545 // copy into code heap 1546 address handler = set_handler(&buffer); 1547 if (handler == nullptr) { 1548 // use slow signature handler (without memorizing it in the fingerprints) 1549 } else { 1550 // debugging support 1551 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1552 ttyLocker ttyl; 1553 tty->cr(); 1554 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1555 _handlers->length(), 1556 (method->is_static() ? "static" : "receiver"), 1557 method->name_and_sig_as_C_string(), 1558 fingerprint, 1559 buffer.insts_size()); 1560 if (buffer.insts_size() > 0) { 1561 Disassembler::decode(handler, handler + buffer.insts_size(), tty 1562 NOT_PRODUCT(COMMA &buffer.asm_remarks())); 1563 } 1564 #ifndef PRODUCT 1565 address rh_begin = Interpreter::result_handler(method()->result_type()); 1566 if (CodeCache::contains(rh_begin)) { 1567 // else it might be special platform dependent values 1568 tty->print_cr(" --- associated result handler ---"); 1569 address rh_end = rh_begin; 1570 while (*(int*)rh_end != 0) { 1571 rh_end += sizeof(int); 1572 } 1573 Disassembler::decode(rh_begin, rh_end); 1574 } else { 1575 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1576 } 1577 #endif 1578 } 1579 // add handler to library 1580 _fingerprints->append(fingerprint); 1581 _handlers->append(handler); 1582 // set handler index 1583 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1584 handler_index = _fingerprints->length() - 1; 1585 } 1586 } 1587 // Set handler under SignatureHandlerLibrary_lock 1588 if (handler_index < 0) { 1589 // use generic signature handler 1590 method->set_signature_handler(Interpreter::slow_signature_handler()); 1591 } else { 1592 // set handler 1593 method->set_signature_handler(_handlers->at(handler_index)); 1594 } 1595 } else { 1596 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint()); 1597 // use generic signature handler 1598 method->set_signature_handler(Interpreter::slow_signature_handler()); 1599 } 1600 } 1601 #ifdef ASSERT 1602 int handler_index = -1; 1603 int fingerprint_index = -2; 1604 { 1605 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1606 // in any way if accessed from multiple threads. To avoid races with another 1607 // thread which may change the arrays in the above, mutex protected block, we 1608 // have to protect this read access here with the same mutex as well! 1609 MutexLocker mu(SignatureHandlerLibrary_lock); 1610 if (_handlers != nullptr) { 1611 handler_index = _handlers->find(method->signature_handler()); 1612 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1613 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1614 fingerprint_index = _fingerprints->find(fingerprint); 1615 } 1616 } 1617 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1618 handler_index == fingerprint_index, "sanity check"); 1619 #endif // ASSERT 1620 } 1621 1622 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1623 int handler_index = -1; 1624 // use customized signature handler 1625 MutexLocker mu(SignatureHandlerLibrary_lock); 1626 // make sure data structure is initialized 1627 initialize(); 1628 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1629 handler_index = _fingerprints->find(fingerprint); 1630 // create handler if necessary 1631 if (handler_index < 0) { 1632 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1633 tty->cr(); 1634 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1635 _handlers->length(), 1636 p2i(handler), 1637 fingerprint); 1638 } 1639 _fingerprints->append(fingerprint); 1640 _handlers->append(handler); 1641 } else { 1642 if (PrintSignatureHandlers) { 1643 tty->cr(); 1644 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1645 _handlers->length(), 1646 fingerprint, 1647 p2i(_handlers->at(handler_index)), 1648 p2i(handler)); 1649 } 1650 } 1651 } 1652 1653 1654 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr; 1655 address SignatureHandlerLibrary::_handler = nullptr; 1656 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr; 1657 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr; 1658 address SignatureHandlerLibrary::_buffer = nullptr; 1659 1660 1661 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method)) 1662 methodHandle m(current, method); 1663 assert(m->is_native(), "sanity check"); 1664 // lookup native function entry point if it doesn't exist 1665 if (!m->has_native_function()) { 1666 NativeLookup::lookup(m, CHECK); 1667 } 1668 // make sure signature handler is installed 1669 SignatureHandlerLibrary::add(m); 1670 // The interpreter entry point checks the signature handler first, 1671 // before trying to fetch the native entry point and klass mirror. 1672 // We must set the signature handler last, so that multiple processors 1673 // preparing the same method will be sure to see non-null entry & mirror. 1674 JRT_END 1675 1676 #if defined(IA32) || defined(AMD64) || defined(ARM) 1677 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address)) 1678 assert(current == JavaThread::current(), "pre-condition"); 1679 if (src_address == dest_address) { 1680 return; 1681 } 1682 ResourceMark rm; 1683 LastFrameAccessor last_frame(current); 1684 assert(last_frame.is_interpreted_frame(), ""); 1685 jint bci = last_frame.bci(); 1686 methodHandle mh(current, last_frame.method()); 1687 Bytecode_invoke invoke(mh, bci); 1688 ArgumentSizeComputer asc(invoke.signature()); 1689 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1690 Copy::conjoint_jbytes(src_address, dest_address, 1691 size_of_arguments * Interpreter::stackElementSize); 1692 JRT_END 1693 #endif 1694 1695 #if INCLUDE_JVMTI 1696 // This is a support of the JVMTI PopFrame interface. 1697 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1698 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1699 // The member_name argument is a saved reference (in local#0) to the member_name. 1700 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1701 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1702 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null, 1703 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name, 1704 Method* method, address bcp)) 1705 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1706 if (code != Bytecodes::_invokestatic) { 1707 return; 1708 } 1709 ConstantPool* cpool = method->constants(); 1710 int cp_index = Bytes::get_native_u2(bcp + 1); 1711 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code)); 1712 Symbol* mname = cpool->name_ref_at(cp_index, code); 1713 1714 if (MethodHandles::has_member_arg(cname, mname)) { 1715 oop member_name_oop = cast_to_oop(member_name); 1716 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1717 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1718 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1719 } 1720 current->set_vm_result(member_name_oop); 1721 } else { 1722 current->set_vm_result(nullptr); 1723 } 1724 JRT_END 1725 #endif // INCLUDE_JVMTI 1726 1727 #ifndef PRODUCT 1728 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to 1729 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1730 // The generated code still uses call_VM because that will set up the frame pointer for 1731 // bcp and method. 1732 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1733 assert(current == JavaThread::current(), "pre-condition"); 1734 LastFrameAccessor last_frame(current); 1735 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame"); 1736 methodHandle mh(current, last_frame.method()); 1737 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2); 1738 return preserve_this_value; 1739 JRT_END 1740 #endif // !PRODUCT 1741 1742 #define DO_COUNTERS(macro) \ 1743 macro(InterpreterRuntime, ldc) \ 1744 macro(InterpreterRuntime, resolve_ldc) \ 1745 macro(InterpreterRuntime, new) \ 1746 macro(InterpreterRuntime, newarray) \ 1747 macro(InterpreterRuntime, anewarray) \ 1748 macro(InterpreterRuntime, multianewarray) \ 1749 macro(InterpreterRuntime, register_finalizer) \ 1750 macro(InterpreterRuntime, quicken_io_cc) \ 1751 macro(InterpreterRuntime, throw_StackOverflowError) \ 1752 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \ 1753 macro(InterpreterRuntime, create_exception) \ 1754 macro(InterpreterRuntime, create_klass_exception) \ 1755 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \ 1756 macro(InterpreterRuntime, throw_ClassCastException) \ 1757 macro(InterpreterRuntime, exception_handler_for_exception) \ 1758 macro(InterpreterRuntime, throw_pending_exception) \ 1759 macro(InterpreterRuntime, throw_AbstractMethodError) \ 1760 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \ 1761 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \ 1762 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \ 1763 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \ 1764 macro(InterpreterRuntime, throw_NullPointerException) \ 1765 macro(InterpreterRuntime, monitorenter) \ 1766 macro(InterpreterRuntime, monitorenter_obj) \ 1767 macro(InterpreterRuntime, monitorexit) \ 1768 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \ 1769 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \ 1770 macro(InterpreterRuntime, get_original_bytecode_at) \ 1771 macro(InterpreterRuntime, set_original_bytecode_at) \ 1772 macro(InterpreterRuntime, breakpoint) \ 1773 macro(InterpreterRuntime, resolve_getfield) \ 1774 macro(InterpreterRuntime, resolve_putfield) \ 1775 macro(InterpreterRuntime, resolve_getstatic) \ 1776 macro(InterpreterRuntime, resolve_putstatic) \ 1777 macro(InterpreterRuntime, resolve_invokevirtual) \ 1778 macro(InterpreterRuntime, resolve_invokespecial) \ 1779 macro(InterpreterRuntime, resolve_invokestatic) \ 1780 macro(InterpreterRuntime, resolve_invokeinterface) \ 1781 macro(InterpreterRuntime, resolve_invokehandle) \ 1782 macro(InterpreterRuntime, resolve_invokedynamic) \ 1783 macro(InterpreterRuntime, frequency_counter_overflow) \ 1784 macro(InterpreterRuntime, bcp_to_di) \ 1785 macro(InterpreterRuntime, update_mdp_for_ret) \ 1786 macro(InterpreterRuntime, build_method_counters) \ 1787 macro(InterpreterRuntime, at_safepoint) \ 1788 macro(InterpreterRuntime, at_unwind) \ 1789 macro(InterpreterRuntime, post_field_access) \ 1790 macro(InterpreterRuntime, post_field_modification) \ 1791 macro(InterpreterRuntime, post_method_entry) \ 1792 macro(InterpreterRuntime, post_method_exit) \ 1793 macro(InterpreterRuntime, interpreter_contains) \ 1794 macro(InterpreterRuntime, prepare_native_call) 1795 1796 #if INCLUDE_JVMTI 1797 #define DO_JVMTI_COUNTERS(macro) \ 1798 macro(InterpreterRuntime, member_name_arg_or_null) 1799 #else 1800 #define DO_JVMTI_COUNTERS(macro) 1801 #endif /* INCLUDE_JVMTI */ 1802 1803 #define INIT_COUNTER(sub, name) \ 1804 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \ 1805 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count"); 1806 1807 void InterpreterRuntime::init_counters() { 1808 if (UsePerfData) { 1809 EXCEPTION_MARK; 1810 1811 DO_COUNTERS(INIT_COUNTER) 1812 DO_JVMTI_COUNTERS(INIT_COUNTER) 1813 1814 if (HAS_PENDING_EXCEPTION) { 1815 vm_exit_during_initialization("jvm_perf_init failed unexpectedly"); 1816 } 1817 } 1818 } 1819 #undef INIT_COUNTER 1820 1821 #define PRINT_COUNTER(sub, name) { \ 1822 jlong count = _perf_##sub##_##name##_count->get_value(); \ 1823 if (count > 0) { \ 1824 st->print_cr(" %-50s = %4ldms (elapsed) %4ldms (thread) (%5ld events)", #sub "::" #name, \ 1825 _perf_##sub##_##name##_timer->elapsed_counter_value_ms(), \ 1826 _perf_##sub##_##name##_timer->thread_counter_value_ms(), \ 1827 count); \ 1828 }} 1829 1830 void InterpreterRuntime::print_counters_on(outputStream* st) { 1831 if (UsePerfData && ProfileRuntimeCalls) { 1832 DO_COUNTERS(PRINT_COUNTER) 1833 DO_JVMTI_COUNTERS(PRINT_COUNTER) 1834 } else { 1835 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData")); 1836 } 1837 } 1838 1839 #undef PRINT_COUNTER 1840 #undef DO_JVMTI_COUNTERS 1841 #undef DO_COUNTERS 1842