1 /* 2 * Copyright (c) 1997, 2025, 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 "classfile/javaClasses.inline.hpp" 26 #include "classfile/symbolTable.hpp" 27 #include "classfile/vmClasses.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/codeCache.hpp" 30 #include "compiler/compilationPolicy.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/disassembler.hpp" 33 #include "gc/shared/barrierSetNMethod.hpp" 34 #include "gc/shared/collectedHeap.hpp" 35 #include "interpreter/bytecodeTracer.hpp" 36 #include "interpreter/interpreter.hpp" 37 #include "interpreter/interpreterRuntime.hpp" 38 #include "interpreter/linkResolver.hpp" 39 #include "interpreter/templateTable.hpp" 40 #include "jvm_io.h" 41 #include "logging/log.hpp" 42 #include "memory/oopFactory.hpp" 43 #include "memory/resourceArea.hpp" 44 #include "memory/universe.hpp" 45 #include "oops/constantPool.inline.hpp" 46 #include "oops/cpCache.inline.hpp" 47 #include "oops/instanceKlass.inline.hpp" 48 #include "oops/klass.inline.hpp" 49 #include "oops/methodData.hpp" 50 #include "oops/method.inline.hpp" 51 #include "oops/objArrayKlass.hpp" 52 #include "oops/objArrayOop.inline.hpp" 53 #include "oops/oop.inline.hpp" 54 #include "oops/symbol.hpp" 55 #include "prims/jvmtiExport.hpp" 56 #include "prims/methodHandles.hpp" 57 #include "prims/nativeLookup.hpp" 58 #include "runtime/atomic.hpp" 59 #include "runtime/continuation.hpp" 60 #include "runtime/deoptimization.hpp" 61 #include "runtime/fieldDescriptor.inline.hpp" 62 #include "runtime/frame.inline.hpp" 63 #include "runtime/handles.inline.hpp" 64 #include "runtime/icache.hpp" 65 #include "runtime/interfaceSupport.inline.hpp" 66 #include "runtime/java.hpp" 67 #include "runtime/javaCalls.hpp" 68 #include "runtime/jfieldIDWorkaround.hpp" 69 #include "runtime/osThread.hpp" 70 #include "runtime/sharedRuntime.hpp" 71 #include "runtime/stackWatermarkSet.hpp" 72 #include "runtime/stubRoutines.hpp" 73 #include "runtime/synchronizer.inline.hpp" 74 #include "utilities/align.hpp" 75 #include "utilities/checkedCast.hpp" 76 #include "utilities/copy.hpp" 77 #include "utilities/events.hpp" 78 #if INCLUDE_JFR 79 #include "jfr/jfr.inline.hpp" 80 #endif 81 82 // Helper class to access current interpreter state 83 class LastFrameAccessor : public StackObj { 84 frame _last_frame; 85 public: 86 LastFrameAccessor(JavaThread* current) { 87 assert(current == Thread::current(), "sanity"); 88 _last_frame = current->last_frame(); 89 } 90 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); } 91 Method* method() const { return _last_frame.interpreter_frame_method(); } 92 address bcp() const { return _last_frame.interpreter_frame_bcp(); } 93 int bci() const { return _last_frame.interpreter_frame_bci(); } 94 address mdp() const { return _last_frame.interpreter_frame_mdp(); } 95 96 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); } 97 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); } 98 99 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272) 100 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); } 101 102 Bytecode bytecode() const { return Bytecode(method(), bcp()); } 103 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); } 104 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); } 105 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); } 106 int number_of_dimensions() const { return bcp()[3]; } 107 108 oop callee_receiver(Symbol* signature) { 109 return _last_frame.interpreter_callee_receiver(signature); 110 } 111 BasicObjectLock* monitor_begin() const { 112 return _last_frame.interpreter_frame_monitor_begin(); 113 } 114 BasicObjectLock* monitor_end() const { 115 return _last_frame.interpreter_frame_monitor_end(); 116 } 117 BasicObjectLock* next_monitor(BasicObjectLock* current) const { 118 return _last_frame.next_monitor_in_interpreter_frame(current); 119 } 120 121 frame& get_frame() { return _last_frame; } 122 }; 123 124 //------------------------------------------------------------------------------------------------------------------------ 125 // State accessors 126 127 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) { 128 LastFrameAccessor last_frame(current); 129 last_frame.set_bcp(bcp); 130 if (ProfileInterpreter) { 131 // ProfileTraps uses MDOs independently of ProfileInterpreter. 132 // That is why we must check both ProfileInterpreter and mdo != nullptr. 133 MethodData* mdo = last_frame.method()->method_data(); 134 if (mdo != nullptr) { 135 NEEDS_CLEANUP; 136 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci())); 137 } 138 } 139 } 140 141 //------------------------------------------------------------------------------------------------------------------------ 142 // Constants 143 144 145 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide)) 146 // access constant pool 147 LastFrameAccessor last_frame(current); 148 ConstantPool* pool = last_frame.method()->constants(); 149 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc); 150 constantTag tag = pool->tag_at(cp_index); 151 152 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 153 Klass* klass = pool->klass_at(cp_index, CHECK); 154 oop java_class = klass->java_mirror(); 155 current->set_vm_result_oop(java_class); 156 JRT_END 157 158 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) { 159 assert(bytecode == Bytecodes::_ldc || 160 bytecode == Bytecodes::_ldc_w || 161 bytecode == Bytecodes::_ldc2_w || 162 bytecode == Bytecodes::_fast_aldc || 163 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 164 ResourceMark rm(current); 165 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc || 166 bytecode == Bytecodes::_fast_aldc_w); 167 LastFrameAccessor last_frame(current); 168 methodHandle m (current, last_frame.method()); 169 Bytecode_loadconstant ldc(m, last_frame.bci()); 170 171 // Double-check the size. (Condy can have any type.) 172 BasicType type = ldc.result_type(); 173 switch (type2size[type]) { 174 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break; 175 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break; 176 default: ShouldNotReachHere(); 177 } 178 179 // Resolve the constant. This does not do unboxing. 180 // But it does replace Universe::the_null_sentinel by null. 181 oop result = ldc.resolve_constant(CHECK); 182 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc"); 183 184 #ifdef ASSERT 185 { 186 // The bytecode wrappers aren't GC-safe so construct a new one 187 Bytecode_loadconstant ldc2(m, last_frame.bci()); 188 int rindex = ldc2.cache_index(); 189 if (rindex < 0) 190 rindex = m->constants()->cp_to_object_index(ldc2.pool_index()); 191 if (rindex >= 0) { 192 oop coop = m->constants()->resolved_reference_at(rindex); 193 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result); 194 assert(roop == coop, "expected result for assembly code"); 195 } 196 } 197 #endif 198 current->set_vm_result_oop(result); 199 if (!is_fast_aldc) { 200 // Tell the interpreter how to unbox the primitive. 201 guarantee(java_lang_boxing_object::is_instance(result, type), ""); 202 int offset = java_lang_boxing_object::value_offset(type); 203 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift) 204 | (offset & ConstantPoolCache::field_index_mask)); 205 current->set_vm_result_metadata((Metadata*)flags); 206 } 207 } 208 JRT_END 209 210 211 //------------------------------------------------------------------------------------------------------------------------ 212 // Allocation 213 214 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index)) 215 Klass* k = pool->klass_at(index, CHECK); 216 InstanceKlass* klass = InstanceKlass::cast(k); 217 218 // Make sure we are not instantiating an abstract klass 219 klass->check_valid_for_instantiation(true, CHECK); 220 221 // Make sure klass is initialized 222 klass->initialize(CHECK); 223 224 oop obj = klass->allocate_instance(CHECK); 225 current->set_vm_result_oop(obj); 226 JRT_END 227 228 229 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size)) 230 oop obj = oopFactory::new_typeArray(type, size, CHECK); 231 current->set_vm_result_oop(obj); 232 JRT_END 233 234 235 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size)) 236 Klass* klass = pool->klass_at(index, CHECK); 237 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 238 current->set_vm_result_oop(obj); 239 JRT_END 240 241 242 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address)) 243 // We may want to pass in more arguments - could make this slightly faster 244 LastFrameAccessor last_frame(current); 245 ConstantPool* constants = last_frame.method()->constants(); 246 int i = last_frame.get_index_u2(Bytecodes::_multianewarray); 247 Klass* klass = constants->klass_at(i, CHECK); 248 int nof_dims = last_frame.number_of_dimensions(); 249 assert(klass->is_klass(), "not a class"); 250 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 251 252 // We must create an array of jints to pass to multi_allocate. 253 ResourceMark rm(current); 254 const int small_dims = 10; 255 jint dim_array[small_dims]; 256 jint *dims = &dim_array[0]; 257 if (nof_dims > small_dims) { 258 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 259 } 260 for (int index = 0; index < nof_dims; index++) { 261 // offset from first_size_address is addressed as local[index] 262 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 263 dims[index] = first_size_address[n]; 264 } 265 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 266 current->set_vm_result_oop(obj); 267 JRT_END 268 269 270 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj)) 271 assert(oopDesc::is_oop(obj), "must be a valid oop"); 272 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 273 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 274 JRT_END 275 276 277 // Quicken instance-of and check-cast bytecodes 278 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current)) 279 // Force resolving; quicken the bytecode 280 LastFrameAccessor last_frame(current); 281 int which = last_frame.get_index_u2(Bytecodes::_checkcast); 282 ConstantPool* cpool = last_frame.method()->constants(); 283 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 284 // program we might have seen an unquick'd bytecode in the interpreter but have another 285 // thread quicken the bytecode before we get here. 286 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 287 Klass* klass = cpool->klass_at(which, CHECK); 288 current->set_vm_result_metadata(klass); 289 JRT_END 290 291 292 //------------------------------------------------------------------------------------------------------------------------ 293 // Exceptions 294 295 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason, 296 const methodHandle& trap_method, int trap_bci) { 297 if (trap_method.not_null()) { 298 MethodData* trap_mdo = trap_method->method_data(); 299 if (trap_mdo == nullptr) { 300 ExceptionMark em(current); 301 JavaThread* THREAD = current; // For exception macros. 302 Method::build_profiling_method_data(trap_method, THREAD); 303 if (HAS_PENDING_EXCEPTION) { 304 // Only metaspace OOM is expected. No Java code executed. 305 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())), 306 "we expect only an OOM error here"); 307 CLEAR_PENDING_EXCEPTION; 308 } 309 trap_mdo = trap_method->method_data(); 310 // and fall through... 311 } 312 if (trap_mdo != nullptr) { 313 // Update per-method count of trap events. The interpreter 314 // is updating the MDO to simulate the effect of compiler traps. 315 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 316 } 317 } 318 } 319 320 // Assume the compiler is (or will be) interested in this event. 321 // If necessary, create an MDO to hold the information, and record it. 322 void InterpreterRuntime::note_trap(JavaThread* current, int reason) { 323 assert(ProfileTraps, "call me only if profiling"); 324 LastFrameAccessor last_frame(current); 325 methodHandle trap_method(current, last_frame.method()); 326 int trap_bci = trap_method->bci_from(last_frame.bcp()); 327 note_trap_inner(current, reason, trap_method, trap_bci); 328 } 329 330 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 331 // get klass 332 InstanceKlass* klass = InstanceKlass::cast(k); 333 assert(klass->is_initialized(), 334 "this klass should have been initialized during VM initialization"); 335 // create instance - do not call constructor since we may have no 336 // (java) stack space left (should assert constructor is empty) 337 Handle exception; 338 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 339 exception = Handle(THREAD, exception_oop); 340 if (StackTraceInThrowable) { 341 java_lang_Throwable::fill_in_stack_trace(exception); 342 } 343 return exception; 344 } 345 346 // Special handling for stack overflow: since we don't have any (java) stack 347 // space left we use the pre-allocated & pre-initialized StackOverflowError 348 // klass to create an stack overflow error instance. We do not call its 349 // constructor for the same reason (it is empty, anyway). 350 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current)) 351 Handle exception = get_preinitialized_exception( 352 vmClasses::StackOverflowError_klass(), 353 CHECK); 354 // Increment counter for hs_err file reporting 355 Atomic::inc(&Exceptions::_stack_overflow_errors); 356 // Remove the ScopedValue bindings in case we got a StackOverflowError 357 // while we were trying to manipulate ScopedValue bindings. 358 current->clear_scopedValueBindings(); 359 THROW_HANDLE(exception); 360 JRT_END 361 362 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current)) 363 Handle exception = get_preinitialized_exception( 364 vmClasses::StackOverflowError_klass(), 365 CHECK); 366 java_lang_Throwable::set_message(exception(), 367 Universe::delayed_stack_overflow_error_message()); 368 // Increment counter for hs_err file reporting 369 Atomic::inc(&Exceptions::_stack_overflow_errors); 370 // Remove the ScopedValue bindings in case we got a StackOverflowError 371 // while we were trying to manipulate ScopedValue bindings. 372 current->clear_scopedValueBindings(); 373 THROW_HANDLE(exception); 374 JRT_END 375 376 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message)) 377 // lookup exception klass 378 TempNewSymbol s = SymbolTable::new_symbol(name); 379 if (ProfileTraps) { 380 if (s == vmSymbols::java_lang_ArithmeticException()) { 381 note_trap(current, Deoptimization::Reason_div0_check); 382 } else if (s == vmSymbols::java_lang_NullPointerException()) { 383 note_trap(current, Deoptimization::Reason_null_check); 384 } 385 } 386 // create exception 387 Handle exception = Exceptions::new_exception(current, s, message); 388 current->set_vm_result_oop(exception()); 389 JRT_END 390 391 392 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj)) 393 // Produce the error message first because note_trap can safepoint 394 ResourceMark rm(current); 395 const char* klass_name = obj->klass()->external_name(); 396 // lookup exception klass 397 TempNewSymbol s = SymbolTable::new_symbol(name); 398 if (ProfileTraps) { 399 if (s == vmSymbols::java_lang_ArrayStoreException()) { 400 note_trap(current, Deoptimization::Reason_array_check); 401 } else { 402 note_trap(current, Deoptimization::Reason_class_check); 403 } 404 } 405 // create exception, with klass name as detail message 406 Handle exception = Exceptions::new_exception(current, s, klass_name); 407 current->set_vm_result_oop(exception()); 408 JRT_END 409 410 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index)) 411 // Produce the error message first because note_trap can safepoint 412 ResourceMark rm(current); 413 stringStream ss; 414 ss.print("Index %d out of bounds for length %d", index, a->length()); 415 416 if (ProfileTraps) { 417 note_trap(current, Deoptimization::Reason_range_check); 418 } 419 420 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 421 JRT_END 422 423 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 424 JavaThread* current, oopDesc* obj)) 425 426 // Produce the error message first because note_trap can safepoint 427 ResourceMark rm(current); 428 char* message = SharedRuntime::generate_class_cast_message( 429 current, obj->klass()); 430 431 if (ProfileTraps) { 432 note_trap(current, Deoptimization::Reason_class_check); 433 } 434 435 // create exception 436 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 437 JRT_END 438 439 // exception_handler_for_exception(...) returns the continuation address, 440 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 441 // The exception oop is returned to make sure it is preserved over GC (it 442 // is only on the stack if the exception was thrown explicitly via athrow). 443 // During this operation, the expression stack contains the values for the 444 // bci where the exception happened. If the exception was propagated back 445 // from a call, the expression stack contains the values for the bci at the 446 // invoke w/o arguments (i.e., as if one were inside the call). 447 // Note that the implementation of this method assumes it's only called when an exception has actually occured 448 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception)) 449 // We get here after we have unwound from a callee throwing an exception 450 // into the interpreter. Any deferred stack processing is notified of 451 // the event via the StackWatermarkSet. 452 StackWatermarkSet::after_unwind(current); 453 454 LastFrameAccessor last_frame(current); 455 Handle h_exception(current, exception); 456 methodHandle h_method (current, last_frame.method()); 457 constantPoolHandle h_constants(current, h_method->constants()); 458 bool should_repeat; 459 int handler_bci; 460 int current_bci = last_frame.bci(); 461 462 if (current->frames_to_pop_failed_realloc() > 0) { 463 // Allocation of scalar replaced object used in this frame 464 // failed. Unconditionally pop the frame. 465 current->dec_frames_to_pop_failed_realloc(); 466 current->set_vm_result_oop(h_exception()); 467 // If the method is synchronized we already unlocked the monitor 468 // during deoptimization so the interpreter needs to skip it when 469 // the frame is popped. 470 current->set_do_not_unlock_if_synchronized(true); 471 return Interpreter::remove_activation_entry(); 472 } 473 474 // Need to do this check first since when _do_not_unlock_if_synchronized 475 // is set, we don't want to trigger any classloading which may make calls 476 // into java, or surprisingly find a matching exception handler for bci 0 477 // since at this moment the method hasn't been "officially" entered yet. 478 if (current->do_not_unlock_if_synchronized()) { 479 ResourceMark rm; 480 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 481 current->set_vm_result_oop(exception); 482 return Interpreter::remove_activation_entry(); 483 } 484 485 do { 486 should_repeat = false; 487 488 // assertions 489 assert(h_exception.not_null(), "null exceptions should be handled by athrow"); 490 // Check that exception is a subclass of Throwable. 491 assert(h_exception->is_a(vmClasses::Throwable_klass()), 492 "Exception not subclass of Throwable"); 493 494 // tracing 495 if (log_is_enabled(Info, exceptions)) { 496 ResourceMark rm(current); 497 stringStream tempst; 498 tempst.print("interpreter method <%s>\n" 499 " at bci %d for thread " INTPTR_FORMAT " (%s)", 500 h_method->print_value_string(), current_bci, p2i(current), current->name()); 501 Exceptions::log_exception(h_exception, tempst.as_string()); 502 } 503 if (log_is_enabled(Info, exceptions, stacktrace)) { 504 Exceptions::log_exception_stacktrace(h_exception, h_method, current_bci); 505 } 506 507 // Don't go paging in something which won't be used. 508 // else if (extable->length() == 0) { 509 // // disabled for now - interpreter is not using shortcut yet 510 // // (shortcut is not to call runtime if we have no exception handlers) 511 // // warning("performance bug: should not call runtime if method has no exception handlers"); 512 // } 513 // for AbortVMOnException flag 514 Exceptions::debug_check_abort(h_exception); 515 516 // exception handler lookup 517 Klass* klass = h_exception->klass(); 518 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD); 519 if (HAS_PENDING_EXCEPTION) { 520 // We threw an exception while trying to find the exception handler. 521 // Transfer the new exception to the exception handle which will 522 // be set into thread local storage, and do another lookup for an 523 // exception handler for this exception, this time starting at the 524 // BCI of the exception handler which caused the exception to be 525 // thrown (bug 4307310). 526 h_exception = Handle(THREAD, PENDING_EXCEPTION); 527 CLEAR_PENDING_EXCEPTION; 528 if (handler_bci >= 0) { 529 current_bci = handler_bci; 530 should_repeat = true; 531 } 532 } 533 } while (should_repeat == true); 534 535 #if INCLUDE_JVMCI 536 if (EnableJVMCI && h_method->method_data() != nullptr) { 537 ResourceMark rm(current); 538 MethodData* mdo = h_method->method_data(); 539 540 // Lock to read ProfileData, and ensure lock is not broken by a safepoint 541 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag); 542 543 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr); 544 if (pdata != nullptr && pdata->is_BitData()) { 545 BitData* bit_data = (BitData*) pdata; 546 bit_data->set_exception_seen(); 547 } 548 } 549 #endif 550 551 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 552 // time throw or a stack unwinding throw and accordingly notify the debugger 553 if (JvmtiExport::can_post_on_exceptions()) { 554 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception()); 555 } 556 557 address continuation = nullptr; 558 address handler_pc = nullptr; 559 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) { 560 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 561 // handler in this method, or (b) after a stack overflow there is not yet 562 // enough stack space available to reprotect the stack. 563 continuation = Interpreter::remove_activation_entry(); 564 #if COMPILER2_OR_JVMCI 565 // Count this for compilation purposes 566 h_method->interpreter_throwout_increment(THREAD); 567 #endif 568 } else { 569 // handler in this method => change bci/bcp to handler bci/bcp and continue there 570 handler_pc = h_method->code_base() + handler_bci; 571 h_method->set_exception_handler_entered(handler_bci); // profiling 572 #ifndef ZERO 573 set_bcp_and_mdp(handler_pc, current); 574 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 575 #else 576 continuation = (address)(intptr_t) handler_bci; 577 #endif 578 } 579 580 // notify debugger of an exception catch 581 // (this is good for exceptions caught in native methods as well) 582 if (JvmtiExport::can_post_on_exceptions()) { 583 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr)); 584 } 585 586 current->set_vm_result_oop(h_exception()); 587 return continuation; 588 JRT_END 589 590 591 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current)) 592 assert(current->has_pending_exception(), "must only be called if there's an exception pending"); 593 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 594 JRT_END 595 596 597 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current)) 598 THROW(vmSymbols::java_lang_AbstractMethodError()); 599 JRT_END 600 601 // This method is called from the "abstract_entry" of the interpreter. 602 // At that point, the arguments have already been removed from the stack 603 // and therefore we don't have the receiver object at our fingertips. (Though, 604 // on some platforms the receiver still resides in a register...). Thus, 605 // we have no choice but print an error message not containing the receiver 606 // type. 607 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current, 608 Method* missingMethod)) 609 ResourceMark rm(current); 610 assert(missingMethod != nullptr, "sanity"); 611 methodHandle m(current, missingMethod); 612 LinkResolver::throw_abstract_method_error(m, THREAD); 613 JRT_END 614 615 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current, 616 Klass* recvKlass, 617 Method* missingMethod)) 618 ResourceMark rm(current); 619 methodHandle mh = methodHandle(current, missingMethod); 620 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD); 621 JRT_END 622 623 624 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current)) 625 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 626 JRT_END 627 628 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current, 629 Klass* recvKlass, 630 Klass* interfaceKlass)) 631 ResourceMark rm(current); 632 char buf[1000]; 633 buf[0] = '\0'; 634 jio_snprintf(buf, sizeof(buf), 635 "Class %s does not implement the requested interface %s", 636 recvKlass ? recvKlass->external_name() : "nullptr", 637 interfaceKlass ? interfaceKlass->external_name() : "nullptr"); 638 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 639 JRT_END 640 641 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current)) 642 THROW(vmSymbols::java_lang_NullPointerException()); 643 JRT_END 644 645 //------------------------------------------------------------------------------------------------------------------------ 646 // Fields 647 // 648 649 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) { 650 LastFrameAccessor last_frame(current); 651 constantPoolHandle pool(current, last_frame.method()->constants()); 652 methodHandle m(current, last_frame.method()); 653 654 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current); 655 } 656 657 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index, 658 methodHandle& m, 659 constantPoolHandle& pool, 660 bool initialize_holder, TRAPS) { 661 fieldDescriptor info; 662 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 663 bytecode == Bytecodes::_putstatic); 664 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 665 666 { 667 JvmtiHideSingleStepping jhss(THREAD); 668 LinkResolver::resolve_field_access(info, pool, field_index, 669 m, bytecode, initialize_holder, CHECK); 670 } // end JvmtiHideSingleStepping 671 672 // check if link resolution caused cpCache to be updated 673 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return; 674 675 // compute auxiliary field attributes 676 TosState state = as_TosState(info.field_type()); 677 678 // Resolution of put instructions on final fields is delayed. That is required so that 679 // exceptions are thrown at the correct place (when the instruction is actually invoked). 680 // If we do not resolve an instruction in the current pass, leaving the put_code 681 // set to zero will cause the next put instruction to the same field to reresolve. 682 683 // Resolution of put instructions to final instance fields with invalid updates (i.e., 684 // to final instance fields with updates originating from a method different than <init>) 685 // is inhibited. A putfield instruction targeting an instance final field must throw 686 // an IllegalAccessError if the instruction is not in an instance 687 // initializer method <init>. If resolution were not inhibited, a putfield 688 // in an initializer method could be resolved in the initializer. Subsequent 689 // putfield instructions to the same field would then use cached information. 690 // As a result, those instructions would not pass through the VM. That is, 691 // checks in resolve_field_access() would not be executed for those instructions 692 // and the required IllegalAccessError would not be thrown. 693 // 694 // Also, we need to delay resolving getstatic and putstatic instructions until the 695 // class is initialized. This is required so that access to the static 696 // field will call the initialization function every time until the class 697 // is completely initialized ala. in 2.17.5 in JVM Specification. 698 InstanceKlass* klass = info.field_holder(); 699 bool uninitialized_static = is_static && !klass->is_initialized(); 700 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 701 info.has_initialized_final_update(); 702 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); 703 704 Bytecodes::Code get_code = (Bytecodes::Code)0; 705 Bytecodes::Code put_code = (Bytecodes::Code)0; 706 if (!uninitialized_static) { 707 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 708 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 709 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 710 } 711 } 712 713 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index); 714 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile()); 715 entry->fill_in(info.field_holder(), info.offset(), 716 checked_cast<u2>(info.index()), checked_cast<u1>(state), 717 static_cast<u1>(get_code), static_cast<u1>(put_code)); 718 } 719 720 721 //------------------------------------------------------------------------------------------------------------------------ 722 // Synchronization 723 // 724 // The interpreter's synchronization code is factored out so that it can 725 // be shared by method invocation and synchronized blocks. 726 //%note synchronization_3 727 728 //%note monitor_1 729 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem)) 730 #ifdef ASSERT 731 current->last_frame().interpreter_frame_verify_monitor(elem); 732 #endif 733 Handle h_obj(current, elem->obj()); 734 assert(Universe::heap()->is_in_or_null(h_obj()), 735 "must be null or an object"); 736 ObjectSynchronizer::enter(h_obj, elem->lock(), current); 737 assert(Universe::heap()->is_in_or_null(elem->obj()), 738 "must be null or an object"); 739 #ifdef ASSERT 740 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem); 741 #endif 742 JRT_END 743 744 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem)) 745 oop obj = elem->obj(); 746 assert(Universe::heap()->is_in(obj), "must be an object"); 747 // The object could become unlocked through a JNI call, which we have no other checks for. 748 // Give a fatal message if CheckJNICalls. Otherwise we ignore it. 749 if (obj->is_unlocked()) { 750 if (CheckJNICalls) { 751 fatal("Object has been unlocked by JNI"); 752 } 753 return; 754 } 755 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current()); 756 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor 757 // again at method exit or in the case of an exception. 758 elem->set_obj(nullptr); 759 JRT_END 760 761 762 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current)) 763 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 764 JRT_END 765 766 767 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current)) 768 // Returns an illegal exception to install into the current thread. The 769 // pending_exception flag is cleared so normal exception handling does not 770 // trigger. Any current installed exception will be overwritten. This 771 // method will be called during an exception unwind. 772 773 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 774 Handle exception(current, current->vm_result_oop()); 775 assert(exception() != nullptr, "vm result should be set"); 776 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures) 777 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH); 778 current->set_vm_result_oop(exception()); 779 JRT_END 780 781 782 //------------------------------------------------------------------------------------------------------------------------ 783 // Invokes 784 785 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp)) 786 return method->orig_bytecode_at(method->bci_from(bcp)); 787 JRT_END 788 789 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code)) 790 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 791 JRT_END 792 793 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp)) 794 JvmtiExport::post_raw_breakpoint(current, method, bcp); 795 JRT_END 796 797 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) { 798 LastFrameAccessor last_frame(current); 799 // extract receiver from the outgoing argument list if necessary 800 Handle receiver(current, nullptr); 801 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 802 bytecode == Bytecodes::_invokespecial) { 803 ResourceMark rm(current); 804 methodHandle m (current, last_frame.method()); 805 Bytecode_invoke call(m, last_frame.bci()); 806 Symbol* signature = call.signature(); 807 receiver = Handle(current, last_frame.callee_receiver(signature)); 808 809 assert(Universe::heap()->is_in_or_null(receiver()), 810 "sanity check"); 811 assert(receiver.is_null() || 812 !Universe::heap()->is_in(receiver->klass()), 813 "sanity check"); 814 } 815 816 // resolve method 817 CallInfo info; 818 constantPoolHandle pool(current, last_frame.method()->constants()); 819 820 methodHandle resolved_method; 821 822 int method_index = last_frame.get_index_u2(bytecode); 823 { 824 JvmtiHideSingleStepping jhss(current); 825 JavaThread* THREAD = current; // For exception macros. 826 LinkResolver::resolve_invoke(info, receiver, pool, 827 method_index, bytecode, 828 THREAD); 829 830 if (HAS_PENDING_EXCEPTION) { 831 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) { 832 // Preserve the original exception across the call to note_trap() 833 PreserveExceptionMark pm(current); 834 // Recording the trap will help the compiler to potentially recognize this exception as "hot" 835 note_trap(current, Deoptimization::Reason_null_check); 836 } 837 return; 838 } 839 840 resolved_method = methodHandle(current, info.resolved_method()); 841 } // end JvmtiHideSingleStepping 842 843 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index); 844 } 845 846 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode, 847 methodHandle& resolved_method, 848 constantPoolHandle& pool, 849 int method_index) { 850 // Don't allow safepoints until the method is cached. 851 NoSafepointVerifier nsv; 852 853 // check if link resolution caused cpCache to be updated 854 ConstantPoolCache* cache = pool->cache(); 855 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return; 856 857 #ifdef ASSERT 858 if (bytecode == Bytecodes::_invokeinterface) { 859 if (resolved_method->method_holder() == vmClasses::Object_klass()) { 860 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 861 // (see also CallInfo::set_interface for details) 862 assert(info.call_kind() == CallInfo::vtable_call || 863 info.call_kind() == CallInfo::direct_call, ""); 864 assert(resolved_method->is_final() || info.has_vtable_index(), 865 "should have been set already"); 866 } else if (!resolved_method->has_itable_index()) { 867 // Resolved something like CharSequence.toString. Use vtable not itable. 868 assert(info.call_kind() != CallInfo::itable_call, ""); 869 } else { 870 // Setup itable entry 871 assert(info.call_kind() == CallInfo::itable_call, ""); 872 int index = resolved_method->itable_index(); 873 assert(info.itable_index() == index, ""); 874 } 875 } else if (bytecode == Bytecodes::_invokespecial) { 876 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 877 } else { 878 assert(info.call_kind() == CallInfo::direct_call || 879 info.call_kind() == CallInfo::vtable_call, ""); 880 } 881 #endif 882 // Get sender and only set cpCache entry to resolved if it is not an 883 // interface. The receiver for invokespecial calls within interface 884 // methods must be checked for every call. 885 InstanceKlass* sender = pool->pool_holder(); 886 887 switch (info.call_kind()) { 888 case CallInfo::direct_call: 889 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface()); 890 break; 891 case CallInfo::vtable_call: 892 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index()); 893 break; 894 case CallInfo::itable_call: 895 cache->set_itable_call( 896 bytecode, 897 method_index, 898 info.resolved_klass(), 899 resolved_method, 900 info.itable_index()); 901 break; 902 default: ShouldNotReachHere(); 903 } 904 } 905 906 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index, 907 constantPoolHandle& pool, TRAPS) { 908 LinkInfo link_info(pool, method_index, bytecode, CHECK); 909 910 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) { 911 CallInfo call_info; 912 switch (bytecode) { 913 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break; 914 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break; 915 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break; 916 917 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode)); 918 } 919 methodHandle resolved_method(THREAD, call_info.resolved_method()); 920 guarantee(resolved_method->method_holder()->is_linked(), ""); 921 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index); 922 } else { 923 // FIXME: why a shared class is not linked yet? 924 // Can't link it here since there are no guarantees it'll be prelinked on the next run. 925 ResourceMark rm; 926 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass()); 927 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s", 928 resolved_iklass->is_shared() ? "is_shared" : "", 929 resolved_iklass->init_state_name(), 930 resolved_iklass->external_name()); 931 } 932 } 933 934 // First time execution: Resolve symbols, create a permanent MethodType object. 935 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) { 936 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 937 LastFrameAccessor last_frame(current); 938 939 // resolve method 940 CallInfo info; 941 constantPoolHandle pool(current, last_frame.method()->constants()); 942 int method_index = last_frame.get_index_u2(bytecode); 943 { 944 JvmtiHideSingleStepping jhss(current); 945 JavaThread* THREAD = current; // For exception macros. 946 LinkResolver::resolve_invoke(info, Handle(), pool, 947 method_index, bytecode, 948 CHECK); 949 } // end JvmtiHideSingleStepping 950 951 pool->cache()->set_method_handle(method_index, info); 952 } 953 954 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index, 955 constantPoolHandle& pool, TRAPS) { 956 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 957 CallInfo info; 958 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK); 959 960 pool->cache()->set_method_handle(raw_index, info); 961 } 962 963 // First time execution: Resolve symbols, create a permanent CallSite object. 964 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) { 965 LastFrameAccessor last_frame(current); 966 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 967 968 // resolve method 969 CallInfo info; 970 constantPoolHandle pool(current, last_frame.method()->constants()); 971 int index = last_frame.get_index_u4(bytecode); 972 { 973 JvmtiHideSingleStepping jhss(current); 974 JavaThread* THREAD = current; // For exception macros. 975 LinkResolver::resolve_invoke(info, Handle(), pool, 976 index, bytecode, CHECK); 977 } // end JvmtiHideSingleStepping 978 979 pool->cache()->set_dynamic_call(info, index); 980 } 981 982 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index, 983 constantPoolHandle& pool, TRAPS) { 984 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 985 CallInfo info; 986 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK); 987 pool->cache()->set_dynamic_call(info, raw_index); 988 } 989 990 // This function is the interface to the assembly code. It returns the resolved 991 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 992 // This function will check for redefinition! 993 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) { 994 switch (bytecode) { 995 case Bytecodes::_getstatic: 996 case Bytecodes::_putstatic: 997 case Bytecodes::_getfield: 998 case Bytecodes::_putfield: 999 resolve_get_put(current, bytecode); 1000 break; 1001 case Bytecodes::_invokevirtual: 1002 case Bytecodes::_invokespecial: 1003 case Bytecodes::_invokestatic: 1004 case Bytecodes::_invokeinterface: 1005 resolve_invoke(current, bytecode); 1006 break; 1007 case Bytecodes::_invokehandle: 1008 resolve_invokehandle(current); 1009 break; 1010 case Bytecodes::_invokedynamic: 1011 resolve_invokedynamic(current); 1012 break; 1013 default: 1014 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 1015 break; 1016 } 1017 } 1018 JRT_END 1019 1020 //------------------------------------------------------------------------------------------------------------------------ 1021 // Miscellaneous 1022 1023 1024 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) { 1025 // Enable WXWrite: the function is called directly by interpreter. 1026 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current)); 1027 1028 // frequency_counter_overflow_inner can throw async exception. 1029 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp); 1030 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests"); 1031 if (branch_bcp != nullptr && nm != nullptr) { 1032 // This was a successful request for an OSR nmethod. Because 1033 // frequency_counter_overflow_inner ends with a safepoint check, 1034 // nm could have been unloaded so look it up again. It's unsafe 1035 // to examine nm directly since it might have been freed and used 1036 // for something else. 1037 LastFrameAccessor last_frame(current); 1038 Method* method = last_frame.method(); 1039 int bci = method->bci_from(last_frame.bcp()); 1040 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 1041 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1042 if (nm != nullptr) { 1043 // in case the transition passed a safepoint we need to barrier this again 1044 if (!bs_nm->nmethod_osr_entry_barrier(nm)) { 1045 nm = nullptr; 1046 } 1047 } 1048 } 1049 if (nm != nullptr && current->is_interp_only_mode()) { 1050 // Normally we never get an nm if is_interp_only_mode() is true, because 1051 // policy()->event has a check for this and won't compile the method when 1052 // true. However, it's possible for is_interp_only_mode() to become true 1053 // during the compilation. We don't want to return the nm in that case 1054 // because we want to continue to execute interpreted. 1055 nm = nullptr; 1056 } 1057 #ifndef PRODUCT 1058 if (TraceOnStackReplacement) { 1059 if (nm != nullptr) { 1060 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 1061 nm->print(); 1062 } 1063 } 1064 #endif 1065 return nm; 1066 } 1067 1068 JRT_ENTRY(nmethod*, 1069 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp)) 1070 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1071 // flag, in case this method triggers classloading which will call into Java. 1072 UnlockFlagSaver fs(current); 1073 1074 LastFrameAccessor last_frame(current); 1075 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1076 methodHandle method(current, last_frame.method()); 1077 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci; 1078 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci; 1079 1080 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL); 1081 1082 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1083 if (osr_nm != nullptr) { 1084 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) { 1085 osr_nm = nullptr; 1086 } 1087 } 1088 return osr_nm; 1089 JRT_END 1090 1091 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 1092 assert(ProfileInterpreter, "must be profiling interpreter"); 1093 int bci = method->bci_from(cur_bcp); 1094 MethodData* mdo = method->method_data(); 1095 if (mdo == nullptr) return 0; 1096 return mdo->bci_to_di(bci); 1097 JRT_END 1098 1099 #ifdef ASSERT 1100 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 1101 assert(ProfileInterpreter, "must be profiling interpreter"); 1102 1103 MethodData* mdo = method->method_data(); 1104 assert(mdo != nullptr, "must not be null"); 1105 1106 int bci = method->bci_from(bcp); 1107 1108 address mdp2 = mdo->bci_to_dp(bci); 1109 if (mdp != mdp2) { 1110 ResourceMark rm; 1111 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1112 int current_di = mdo->dp_to_di(mdp); 1113 int expected_di = mdo->dp_to_di(mdp2); 1114 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1115 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1116 int approx_bci = -1; 1117 if (current_di >= 0) { 1118 approx_bci = mdo->data_at(current_di)->bci(); 1119 } 1120 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1121 mdo->print_on(tty); 1122 method->print_codes(); 1123 } 1124 assert(mdp == mdp2, "wrong mdp"); 1125 JRT_END 1126 #endif // ASSERT 1127 1128 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci)) 1129 assert(ProfileInterpreter, "must be profiling interpreter"); 1130 ResourceMark rm(current); 1131 LastFrameAccessor last_frame(current); 1132 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1133 MethodData* h_mdo = last_frame.method()->method_data(); 1134 1135 // Grab a lock to ensure atomic access to setting the return bci and 1136 // the displacement. This can block and GC, invalidating all naked oops. 1137 MutexLocker ml(RetData_lock); 1138 1139 // ProfileData is essentially a wrapper around a derived oop, so we 1140 // need to take the lock before making any ProfileData structures. 1141 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp())); 1142 guarantee(data != nullptr, "profile data must be valid"); 1143 RetData* rdata = data->as_RetData(); 1144 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1145 last_frame.set_mdp(new_mdp); 1146 JRT_END 1147 1148 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m)) 1149 return Method::build_method_counters(current, m); 1150 JRT_END 1151 1152 1153 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current)) 1154 // We used to need an explicit preserve_arguments here for invoke bytecodes. However, 1155 // stack traversal automatically takes care of preserving arguments for invoke, so 1156 // this is no longer needed. 1157 1158 // JRT_END does an implicit safepoint check, hence we are guaranteed to block 1159 // if this is called during a safepoint 1160 1161 if (JvmtiExport::should_post_single_step()) { 1162 // This function is called by the interpreter when single stepping. Such single 1163 // stepping could unwind a frame. Then, it is important that we process any frames 1164 // that we might return into. 1165 StackWatermarkSet::before_unwind(current); 1166 1167 // We are called during regular safepoints and when the VM is 1168 // single stepping. If any thread is marked for single stepping, 1169 // then we may have JVMTI work to do. 1170 LastFrameAccessor last_frame(current); 1171 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp()); 1172 } 1173 JRT_END 1174 1175 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current)) 1176 assert(current == JavaThread::current(), "pre-condition"); 1177 JFR_ONLY(Jfr::check_and_process_sample_request(current);) 1178 // This function is called by the interpreter when the return poll found a reason 1179 // to call the VM. The reason could be that we are returning into a not yet safe 1180 // to access frame. We handle that below. 1181 // Note that this path does not check for single stepping, because we do not want 1182 // to single step when unwinding frames for an exception being thrown. Instead, 1183 // such single stepping code will use the safepoint table, which will use the 1184 // InterpreterRuntime::at_safepoint callback. 1185 StackWatermarkSet::before_unwind(current); 1186 JRT_END 1187 1188 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj, 1189 ResolvedFieldEntry *entry)) 1190 1191 // check the access_flags for the field in the klass 1192 1193 InstanceKlass* ik = entry->field_holder(); 1194 int index = entry->field_index(); 1195 if (!ik->field_status(index).is_access_watched()) return; 1196 1197 bool is_static = (obj == nullptr); 1198 HandleMark hm(current); 1199 1200 Handle h_obj; 1201 if (!is_static) { 1202 // non-static field accessors have an object, but we need a handle 1203 h_obj = Handle(current, obj); 1204 } 1205 InstanceKlass* field_holder = entry->field_holder(); // HERE 1206 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static); 1207 LastFrameAccessor last_frame(current); 1208 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid); 1209 JRT_END 1210 1211 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj, 1212 ResolvedFieldEntry *entry, jvalue *value)) 1213 1214 InstanceKlass* ik = entry->field_holder(); 1215 1216 // check the access_flags for the field in the klass 1217 int index = entry->field_index(); 1218 // bail out if field modifications are not watched 1219 if (!ik->field_status(index).is_modification_watched()) return; 1220 1221 char sig_type = '\0'; 1222 1223 switch((TosState)entry->tos_state()) { 1224 case btos: sig_type = JVM_SIGNATURE_BYTE; break; 1225 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break; 1226 case ctos: sig_type = JVM_SIGNATURE_CHAR; break; 1227 case stos: sig_type = JVM_SIGNATURE_SHORT; break; 1228 case itos: sig_type = JVM_SIGNATURE_INT; break; 1229 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break; 1230 case atos: sig_type = JVM_SIGNATURE_CLASS; break; 1231 case ltos: sig_type = JVM_SIGNATURE_LONG; break; 1232 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break; 1233 default: ShouldNotReachHere(); return; 1234 } 1235 bool is_static = (obj == nullptr); 1236 1237 HandleMark hm(current); 1238 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static); 1239 jvalue fvalue; 1240 #ifdef _LP64 1241 fvalue = *value; 1242 #else 1243 // Long/double values are stored unaligned and also noncontiguously with 1244 // tagged stacks. We can't just do a simple assignment even in the non- 1245 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1246 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1247 // We assume that the two halves of longs/doubles are stored in interpreter 1248 // stack slots in platform-endian order. 1249 jlong_accessor u; 1250 jint* newval = (jint*)value; 1251 u.words[0] = newval[0]; 1252 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1253 fvalue.j = u.long_value; 1254 #endif // _LP64 1255 1256 Handle h_obj; 1257 if (!is_static) { 1258 // non-static field accessors have an object, but we need a handle 1259 h_obj = Handle(current, obj); 1260 } 1261 1262 LastFrameAccessor last_frame(current); 1263 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj, 1264 fid, sig_type, &fvalue); 1265 JRT_END 1266 1267 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current)) 1268 LastFrameAccessor last_frame(current); 1269 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame()); 1270 JRT_END 1271 1272 1273 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop 1274 // before transitioning to VM, and restore it after transitioning back 1275 // to Java. The return oop at the top-of-stack, is not walked by the GC. 1276 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current)) 1277 LastFrameAccessor last_frame(current); 1278 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame()); 1279 JRT_END 1280 1281 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1282 { 1283 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0); 1284 } 1285 JRT_END 1286 1287 1288 // Implementation of SignatureHandlerLibrary 1289 1290 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1291 // Dummy definition (else normalization method is defined in CPU 1292 // dependent code) 1293 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1294 return fingerprint; 1295 } 1296 #endif 1297 1298 address SignatureHandlerLibrary::set_handler_blob() { 1299 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1300 if (handler_blob == nullptr) { 1301 return nullptr; 1302 } 1303 address handler = handler_blob->code_begin(); 1304 _handler_blob = handler_blob; 1305 _handler = handler; 1306 return handler; 1307 } 1308 1309 void SignatureHandlerLibrary::initialize() { 1310 if (_fingerprints != nullptr) { 1311 return; 1312 } 1313 if (set_handler_blob() == nullptr) { 1314 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1315 } 1316 1317 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1318 SignatureHandlerLibrary::buffer_size); 1319 _buffer = bb->code_begin(); 1320 1321 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode); 1322 _handlers = new (mtCode) GrowableArray<address>(32, mtCode); 1323 } 1324 1325 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1326 address handler = _handler; 1327 int insts_size = buffer->pure_insts_size(); 1328 if (handler + insts_size > _handler_blob->code_end()) { 1329 // get a new handler blob 1330 handler = set_handler_blob(); 1331 } 1332 if (handler != nullptr) { 1333 memcpy(handler, buffer->insts_begin(), insts_size); 1334 pd_set_handler(handler); 1335 ICache::invalidate_range(handler, insts_size); 1336 _handler = handler + insts_size; 1337 } 1338 return handler; 1339 } 1340 1341 void SignatureHandlerLibrary::add(const methodHandle& method) { 1342 if (method->signature_handler() == nullptr) { 1343 // use slow signature handler if we can't do better 1344 int handler_index = -1; 1345 // check if we can use customized (fast) signature handler 1346 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) { 1347 // use customized signature handler 1348 MutexLocker mu(SignatureHandlerLibrary_lock); 1349 // make sure data structure is initialized 1350 initialize(); 1351 // lookup method signature's fingerprint 1352 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1353 // allow CPU dependent code to optimize the fingerprints for the fast handler 1354 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1355 handler_index = _fingerprints->find(fingerprint); 1356 // create handler if necessary 1357 if (handler_index < 0) { 1358 ResourceMark rm; 1359 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer; 1360 CodeBuffer buffer((address)(_buffer + align_offset), 1361 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset)); 1362 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1363 // copy into code heap 1364 address handler = set_handler(&buffer); 1365 if (handler == nullptr) { 1366 // use slow signature handler (without memorizing it in the fingerprints) 1367 } else { 1368 // debugging support 1369 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1370 ttyLocker ttyl; 1371 tty->cr(); 1372 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1373 _handlers->length(), 1374 (method->is_static() ? "static" : "receiver"), 1375 method->name_and_sig_as_C_string(), 1376 fingerprint, 1377 buffer.insts_size()); 1378 if (buffer.insts_size() > 0) { 1379 Disassembler::decode(handler, handler + buffer.insts_size(), tty 1380 NOT_PRODUCT(COMMA &buffer.asm_remarks())); 1381 } 1382 #ifndef PRODUCT 1383 address rh_begin = Interpreter::result_handler(method()->result_type()); 1384 if (CodeCache::contains(rh_begin)) { 1385 // else it might be special platform dependent values 1386 tty->print_cr(" --- associated result handler ---"); 1387 address rh_end = rh_begin; 1388 while (*(int*)rh_end != 0) { 1389 rh_end += sizeof(int); 1390 } 1391 Disassembler::decode(rh_begin, rh_end); 1392 } else { 1393 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1394 } 1395 #endif 1396 } 1397 // add handler to library 1398 _fingerprints->append(fingerprint); 1399 _handlers->append(handler); 1400 // set handler index 1401 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1402 handler_index = _fingerprints->length() - 1; 1403 } 1404 } 1405 // Set handler under SignatureHandlerLibrary_lock 1406 if (handler_index < 0) { 1407 // use generic signature handler 1408 method->set_signature_handler(Interpreter::slow_signature_handler()); 1409 } else { 1410 // set handler 1411 method->set_signature_handler(_handlers->at(handler_index)); 1412 } 1413 } else { 1414 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint()); 1415 // use generic signature handler 1416 method->set_signature_handler(Interpreter::slow_signature_handler()); 1417 } 1418 } 1419 #ifdef ASSERT 1420 int handler_index = -1; 1421 int fingerprint_index = -2; 1422 { 1423 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1424 // in any way if accessed from multiple threads. To avoid races with another 1425 // thread which may change the arrays in the above, mutex protected block, we 1426 // have to protect this read access here with the same mutex as well! 1427 MutexLocker mu(SignatureHandlerLibrary_lock); 1428 if (_handlers != nullptr) { 1429 handler_index = _handlers->find(method->signature_handler()); 1430 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1431 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1432 fingerprint_index = _fingerprints->find(fingerprint); 1433 } 1434 } 1435 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1436 handler_index == fingerprint_index, "sanity check"); 1437 #endif // ASSERT 1438 } 1439 1440 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr; 1441 address SignatureHandlerLibrary::_handler = nullptr; 1442 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr; 1443 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr; 1444 address SignatureHandlerLibrary::_buffer = nullptr; 1445 1446 1447 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method)) 1448 methodHandle m(current, method); 1449 assert(m->is_native(), "sanity check"); 1450 // lookup native function entry point if it doesn't exist 1451 if (!m->has_native_function()) { 1452 NativeLookup::lookup(m, CHECK); 1453 } 1454 // make sure signature handler is installed 1455 SignatureHandlerLibrary::add(m); 1456 // The interpreter entry point checks the signature handler first, 1457 // before trying to fetch the native entry point and klass mirror. 1458 // We must set the signature handler last, so that multiple processors 1459 // preparing the same method will be sure to see non-null entry & mirror. 1460 JRT_END 1461 1462 #if defined(IA32) || defined(AMD64) || defined(ARM) 1463 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address)) 1464 assert(current == JavaThread::current(), "pre-condition"); 1465 if (src_address == dest_address) { 1466 return; 1467 } 1468 ResourceMark rm; 1469 LastFrameAccessor last_frame(current); 1470 assert(last_frame.is_interpreted_frame(), ""); 1471 jint bci = last_frame.bci(); 1472 methodHandle mh(current, last_frame.method()); 1473 Bytecode_invoke invoke(mh, bci); 1474 ArgumentSizeComputer asc(invoke.signature()); 1475 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1476 Copy::conjoint_jbytes(src_address, dest_address, 1477 size_of_arguments * Interpreter::stackElementSize); 1478 JRT_END 1479 #endif 1480 1481 #if INCLUDE_JVMTI 1482 // This is a support of the JVMTI PopFrame interface. 1483 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1484 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters. 1485 // The member_name argument is a saved reference (in local#0) to the member_name. 1486 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1487 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1488 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name, 1489 Method* method, address bcp)) 1490 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1491 if (code != Bytecodes::_invokestatic) { 1492 return; 1493 } 1494 ConstantPool* cpool = method->constants(); 1495 int cp_index = Bytes::get_native_u2(bcp + 1); 1496 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code)); 1497 Symbol* mname = cpool->name_ref_at(cp_index, code); 1498 1499 if (MethodHandles::has_member_arg(cname, mname)) { 1500 oop member_name_oop = cast_to_oop(member_name); 1501 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1502 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1503 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1504 } 1505 current->set_vm_result_oop(member_name_oop); 1506 } else { 1507 current->set_vm_result_oop(nullptr); 1508 } 1509 JRT_END 1510 #endif // INCLUDE_JVMTI 1511 1512 #ifndef PRODUCT 1513 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to 1514 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1515 // The generated code still uses call_VM because that will set up the frame pointer for 1516 // bcp and method. 1517 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1518 assert(current == JavaThread::current(), "pre-condition"); 1519 LastFrameAccessor last_frame(current); 1520 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame"); 1521 methodHandle mh(current, last_frame.method()); 1522 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2); 1523 return preserve_this_value; 1524 JRT_END 1525 #endif // !PRODUCT