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