1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/javaClasses.inline.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/codeCache.hpp" 30 #include "code/codeCacheExtensions.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/disassembler.hpp" 33 #include "gc/shared/collectedHeap.hpp" 34 #include "interpreter/interpreter.hpp" 35 #include "interpreter/interpreterRuntime.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "interpreter/templateTable.hpp" 38 #include "logging/log.hpp" 39 #include "memory/oopFactory.hpp" 40 #include "memory/universe.inline.hpp" 41 #include "oops/constantPool.hpp" 42 #include "oops/instanceKlass.hpp" 43 #include "oops/methodData.hpp" 44 #include "oops/objArrayKlass.hpp" 45 #include "oops/objArrayOop.inline.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "oops/symbol.hpp" 48 #include "prims/jvmtiExport.hpp" 49 #include "prims/nativeLookup.hpp" 50 #include "runtime/atomic.inline.hpp" 51 #include "runtime/biasedLocking.hpp" 52 #include "runtime/compilationPolicy.hpp" 53 #include "runtime/deoptimization.hpp" 54 #include "runtime/fieldDescriptor.hpp" 55 #include "runtime/handles.inline.hpp" 56 #include "runtime/icache.hpp" 57 #include "runtime/interfaceSupport.hpp" 58 #include "runtime/java.hpp" 59 #include "runtime/jfieldIDWorkaround.hpp" 60 #include "runtime/osThread.hpp" 61 #include "runtime/sharedRuntime.hpp" 62 #include "runtime/stubRoutines.hpp" 63 #include "runtime/synchronizer.hpp" 64 #include "runtime/threadCritical.hpp" 65 #include "utilities/events.hpp" 66 #ifdef COMPILER2 67 #include "opto/runtime.hpp" 68 #endif 69 70 class UnlockFlagSaver { 71 private: 72 JavaThread* _thread; 73 bool _do_not_unlock; 74 public: 75 UnlockFlagSaver(JavaThread* t) { 76 _thread = t; 77 _do_not_unlock = t->do_not_unlock_if_synchronized(); 78 t->set_do_not_unlock_if_synchronized(false); 79 } 80 ~UnlockFlagSaver() { 81 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 82 } 83 }; 84 85 //------------------------------------------------------------------------------------------------------------------------ 86 // State accessors 87 88 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 89 last_frame(thread).interpreter_frame_set_bcp(bcp); 90 if (ProfileInterpreter) { 91 // ProfileTraps uses MDOs independently of ProfileInterpreter. 92 // That is why we must check both ProfileInterpreter and mdo != NULL. 93 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 94 if (mdo != NULL) { 95 NEEDS_CLEANUP; 96 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 97 } 98 } 99 } 100 101 //------------------------------------------------------------------------------------------------------------------------ 102 // Constants 103 104 105 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 106 // access constant pool 107 ConstantPool* pool = method(thread)->constants(); 108 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 109 constantTag tag = pool->tag_at(index); 110 111 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 112 Klass* klass = pool->klass_at(index, CHECK); 113 oop java_class = klass->java_mirror(); 114 thread->set_vm_result(java_class); 115 IRT_END 116 117 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 118 assert(bytecode == Bytecodes::_fast_aldc || 119 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 120 ResourceMark rm(thread); 121 methodHandle m (thread, method(thread)); 122 Bytecode_loadconstant ldc(m, bci(thread)); 123 oop result = ldc.resolve_constant(CHECK); 124 #ifdef ASSERT 125 { 126 // The bytecode wrappers aren't GC-safe so construct a new one 127 Bytecode_loadconstant ldc2(m, bci(thread)); 128 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 129 assert(result == coop, "expected result for assembly code"); 130 } 131 #endif 132 thread->set_vm_result(result); 133 } 134 IRT_END 135 136 137 //------------------------------------------------------------------------------------------------------------------------ 138 // Allocation 139 140 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 141 Klass* k_oop = pool->klass_at(index, CHECK); 142 instanceKlassHandle klass (THREAD, k_oop); 143 144 // Make sure we are not instantiating an abstract klass 145 klass->check_valid_for_instantiation(true, CHECK); 146 147 // Make sure klass is initialized 148 klass->initialize(CHECK); 149 150 // At this point the class may not be fully initialized 151 // because of recursive initialization. If it is fully 152 // initialized & has_finalized is not set, we rewrite 153 // it into its fast version (Note: no locking is needed 154 // here since this is an atomic byte write and can be 155 // done more than once). 156 // 157 // Note: In case of classes with has_finalized we don't 158 // rewrite since that saves us an extra check in 159 // the fast version which then would call the 160 // slow version anyway (and do a call back into 161 // Java). 162 // If we have a breakpoint, then we don't rewrite 163 // because the _breakpoint bytecode would be lost. 164 oop obj = klass->allocate_instance(CHECK); 165 thread->set_vm_result(obj); 166 IRT_END 167 168 169 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 170 oop obj = oopFactory::new_typeArray(type, size, CHECK); 171 thread->set_vm_result(obj); 172 IRT_END 173 174 175 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 176 // Note: no oopHandle for pool & klass needed since they are not used 177 // anymore after new_objArray() and no GC can happen before. 178 // (This may have to change if this code changes!) 179 Klass* klass = pool->klass_at(index, CHECK); 180 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 181 thread->set_vm_result(obj); 182 IRT_END 183 184 185 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 186 // We may want to pass in more arguments - could make this slightly faster 187 ConstantPool* constants = method(thread)->constants(); 188 int i = get_index_u2(thread, Bytecodes::_multianewarray); 189 Klass* klass = constants->klass_at(i, CHECK); 190 int nof_dims = number_of_dimensions(thread); 191 assert(klass->is_klass(), "not a class"); 192 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 193 194 // We must create an array of jints to pass to multi_allocate. 195 ResourceMark rm(thread); 196 const int small_dims = 10; 197 jint dim_array[small_dims]; 198 jint *dims = &dim_array[0]; 199 if (nof_dims > small_dims) { 200 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 201 } 202 for (int index = 0; index < nof_dims; index++) { 203 // offset from first_size_address is addressed as local[index] 204 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 205 dims[index] = first_size_address[n]; 206 } 207 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 208 thread->set_vm_result(obj); 209 IRT_END 210 211 212 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 213 assert(obj->is_oop(), "must be a valid oop"); 214 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 215 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 216 IRT_END 217 218 219 // Quicken instance-of and check-cast bytecodes 220 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 221 // Force resolving; quicken the bytecode 222 int which = get_index_u2(thread, Bytecodes::_checkcast); 223 ConstantPool* cpool = method(thread)->constants(); 224 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 225 // program we might have seen an unquick'd bytecode in the interpreter but have another 226 // thread quicken the bytecode before we get here. 227 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 228 Klass* klass = cpool->klass_at(which, CHECK); 229 thread->set_vm_result_2(klass); 230 IRT_END 231 232 233 //------------------------------------------------------------------------------------------------------------------------ 234 // Exceptions 235 236 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 237 methodHandle trap_method, int trap_bci, TRAPS) { 238 if (trap_method.not_null()) { 239 MethodData* trap_mdo = trap_method->method_data(); 240 if (trap_mdo == NULL) { 241 Method::build_interpreter_method_data(trap_method, THREAD); 242 if (HAS_PENDING_EXCEPTION) { 243 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 244 "we expect only an OOM error here"); 245 CLEAR_PENDING_EXCEPTION; 246 } 247 trap_mdo = trap_method->method_data(); 248 // and fall through... 249 } 250 if (trap_mdo != NULL) { 251 // Update per-method count of trap events. The interpreter 252 // is updating the MDO to simulate the effect of compiler traps. 253 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 254 } 255 } 256 } 257 258 // Assume the compiler is (or will be) interested in this event. 259 // If necessary, create an MDO to hold the information, and record it. 260 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 261 assert(ProfileTraps, "call me only if profiling"); 262 methodHandle trap_method(thread, method(thread)); 263 int trap_bci = trap_method->bci_from(bcp(thread)); 264 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 265 } 266 267 #ifdef CC_INTERP 268 // As legacy note_trap, but we have more arguments. 269 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 270 methodHandle trap_method(method); 271 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 272 IRT_END 273 274 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 275 // for each exception. 276 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 277 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 278 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 279 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 280 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 282 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 283 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 284 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 285 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 286 #endif // CC_INTERP 287 288 289 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 290 // get klass 291 InstanceKlass* klass = InstanceKlass::cast(k); 292 assert(klass->is_initialized(), 293 "this klass should have been initialized during VM initialization"); 294 // create instance - do not call constructor since we may have no 295 // (java) stack space left (should assert constructor is empty) 296 Handle exception; 297 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 298 exception = Handle(THREAD, exception_oop); 299 if (StackTraceInThrowable) { 300 java_lang_Throwable::fill_in_stack_trace(exception); 301 } 302 return exception; 303 } 304 305 // Special handling for stack overflow: since we don't have any (java) stack 306 // space left we use the pre-allocated & pre-initialized StackOverflowError 307 // klass to create an stack overflow error instance. We do not call its 308 // constructor for the same reason (it is empty, anyway). 309 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 310 Handle exception = get_preinitialized_exception( 311 SystemDictionary::StackOverflowError_klass(), 312 CHECK); 313 // Increment counter for hs_err file reporting 314 Atomic::inc(&Exceptions::_stack_overflow_errors); 315 THROW_HANDLE(exception); 316 IRT_END 317 318 IRT_ENTRY(address, InterpreterRuntime::check_ReservedStackAccess_annotated_methods(JavaThread* thread)) 319 frame fr = thread->last_frame(); 320 assert(fr.is_java_frame(), "Must be a Java frame"); 321 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); 322 if (activation.sp() != NULL) { 323 thread->disable_stack_reserved_zone(); 324 thread->set_reserved_stack_activation((address)activation.unextended_sp()); 325 } 326 return (address)activation.sp(); 327 IRT_END 328 329 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread)) 330 Handle exception = get_preinitialized_exception( 331 SystemDictionary::StackOverflowError_klass(), 332 CHECK); 333 java_lang_Throwable::set_message(exception(), 334 Universe::delayed_stack_overflow_error_message()); 335 // Increment counter for hs_err file reporting 336 Atomic::inc(&Exceptions::_stack_overflow_errors); 337 THROW_HANDLE(exception); 338 IRT_END 339 340 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 341 // lookup exception klass 342 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 343 if (ProfileTraps) { 344 if (s == vmSymbols::java_lang_ArithmeticException()) { 345 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 346 } else if (s == vmSymbols::java_lang_NullPointerException()) { 347 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 348 } 349 } 350 // create exception 351 Handle exception = Exceptions::new_exception(thread, s, message); 352 thread->set_vm_result(exception()); 353 IRT_END 354 355 356 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 357 ResourceMark rm(thread); 358 const char* klass_name = obj->klass()->external_name(); 359 // lookup exception klass 360 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 361 if (ProfileTraps) { 362 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 363 } 364 // create exception, with klass name as detail message 365 Handle exception = Exceptions::new_exception(thread, s, klass_name); 366 thread->set_vm_result(exception()); 367 IRT_END 368 369 370 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 371 char message[jintAsStringSize]; 372 // lookup exception klass 373 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 374 if (ProfileTraps) { 375 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 376 } 377 // create exception 378 sprintf(message, "%d", index); 379 THROW_MSG(s, message); 380 IRT_END 381 382 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 383 JavaThread* thread, oopDesc* obj)) 384 385 ResourceMark rm(thread); 386 char* message = SharedRuntime::generate_class_cast_message( 387 thread, obj->klass()->external_name()); 388 389 if (ProfileTraps) { 390 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 391 } 392 393 // create exception 394 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 395 IRT_END 396 397 // exception_handler_for_exception(...) returns the continuation address, 398 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 399 // The exception oop is returned to make sure it is preserved over GC (it 400 // is only on the stack if the exception was thrown explicitly via athrow). 401 // During this operation, the expression stack contains the values for the 402 // bci where the exception happened. If the exception was propagated back 403 // from a call, the expression stack contains the values for the bci at the 404 // invoke w/o arguments (i.e., as if one were inside the call). 405 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 406 407 Handle h_exception(thread, exception); 408 methodHandle h_method (thread, method(thread)); 409 constantPoolHandle h_constants(thread, h_method->constants()); 410 bool should_repeat; 411 int handler_bci; 412 int current_bci = bci(thread); 413 414 if (thread->frames_to_pop_failed_realloc() > 0) { 415 // Allocation of scalar replaced object used in this frame 416 // failed. Unconditionally pop the frame. 417 thread->dec_frames_to_pop_failed_realloc(); 418 thread->set_vm_result(h_exception()); 419 // If the method is synchronized we already unlocked the monitor 420 // during deoptimization so the interpreter needs to skip it when 421 // the frame is popped. 422 thread->set_do_not_unlock_if_synchronized(true); 423 #ifdef CC_INTERP 424 return (address) -1; 425 #else 426 return Interpreter::remove_activation_entry(); 427 #endif 428 } 429 430 // Need to do this check first since when _do_not_unlock_if_synchronized 431 // is set, we don't want to trigger any classloading which may make calls 432 // into java, or surprisingly find a matching exception handler for bci 0 433 // since at this moment the method hasn't been "officially" entered yet. 434 if (thread->do_not_unlock_if_synchronized()) { 435 ResourceMark rm; 436 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 437 thread->set_vm_result(exception); 438 #ifdef CC_INTERP 439 return (address) -1; 440 #else 441 return Interpreter::remove_activation_entry(); 442 #endif 443 } 444 445 do { 446 should_repeat = false; 447 448 // assertions 449 #ifdef ASSERT 450 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 451 assert(h_exception->is_oop(), "just checking"); 452 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 453 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 454 if (ExitVMOnVerifyError) vm_exit(-1); 455 ShouldNotReachHere(); 456 } 457 #endif 458 459 // tracing 460 if (log_is_enabled(Info, exceptions)) { 461 ResourceMark rm(thread); 462 Symbol* message = java_lang_Throwable::detail_message(h_exception()); 463 stringStream tempst; 464 if (message != NULL) { 465 tempst.print("Exception <%s: %s> (" INTPTR_FORMAT ")\n", 466 h_exception->print_value_string(), message->as_C_string(), 467 p2i(h_exception())); 468 } else { 469 tempst.print("Exception <%s> (" INTPTR_FORMAT ")\n", 470 h_exception->print_value_string(), 471 p2i(h_exception())); 472 } 473 tempst.print(" thrown in interpreter method <%s>\n" 474 " at bci %d for thread " INTPTR_FORMAT, 475 h_method->print_value_string(), current_bci, p2i(thread)); 476 LogHandle(exceptions)::info_stream()->print_raw_cr(tempst.as_string()); 477 } 478 // Don't go paging in something which won't be used. 479 // else if (extable->length() == 0) { 480 // // disabled for now - interpreter is not using shortcut yet 481 // // (shortcut is not to call runtime if we have no exception handlers) 482 // // warning("performance bug: should not call runtime if method has no exception handlers"); 483 // } 484 // for AbortVMOnException flag 485 Exceptions::debug_check_abort(h_exception); 486 487 // exception handler lookup 488 KlassHandle h_klass(THREAD, h_exception->klass()); 489 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 490 if (HAS_PENDING_EXCEPTION) { 491 // We threw an exception while trying to find the exception handler. 492 // Transfer the new exception to the exception handle which will 493 // be set into thread local storage, and do another lookup for an 494 // exception handler for this exception, this time starting at the 495 // BCI of the exception handler which caused the exception to be 496 // thrown (bug 4307310). 497 h_exception = Handle(THREAD, PENDING_EXCEPTION); 498 CLEAR_PENDING_EXCEPTION; 499 if (handler_bci >= 0) { 500 current_bci = handler_bci; 501 should_repeat = true; 502 } 503 } 504 } while (should_repeat == true); 505 506 #if INCLUDE_JVMCI 507 if (EnableJVMCI && h_method->method_data() != NULL) { 508 ResourceMark rm(thread); 509 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 510 if (pdata != NULL && pdata->is_BitData()) { 511 BitData* bit_data = (BitData*) pdata; 512 bit_data->set_exception_seen(); 513 } 514 } 515 #endif 516 517 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 518 // time throw or a stack unwinding throw and accordingly notify the debugger 519 if (JvmtiExport::can_post_on_exceptions()) { 520 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 521 } 522 523 #ifdef CC_INTERP 524 address continuation = (address)(intptr_t) handler_bci; 525 #else 526 address continuation = NULL; 527 #endif 528 address handler_pc = NULL; 529 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 530 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 531 // handler in this method, or (b) after a stack overflow there is not yet 532 // enough stack space available to reprotect the stack. 533 #ifndef CC_INTERP 534 continuation = Interpreter::remove_activation_entry(); 535 #endif 536 // Count this for compilation purposes 537 h_method->interpreter_throwout_increment(THREAD); 538 } else { 539 // handler in this method => change bci/bcp to handler bci/bcp and continue there 540 handler_pc = h_method->code_base() + handler_bci; 541 #ifndef CC_INTERP 542 set_bcp_and_mdp(handler_pc, thread); 543 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 544 #endif 545 } 546 // notify debugger of an exception catch 547 // (this is good for exceptions caught in native methods as well) 548 if (JvmtiExport::can_post_on_exceptions()) { 549 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 550 } 551 552 thread->set_vm_result(h_exception()); 553 return continuation; 554 IRT_END 555 556 557 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 558 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 559 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 560 IRT_END 561 562 563 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 564 THROW(vmSymbols::java_lang_AbstractMethodError()); 565 IRT_END 566 567 568 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 569 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 570 IRT_END 571 572 573 //------------------------------------------------------------------------------------------------------------------------ 574 // Fields 575 // 576 577 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 578 Thread* THREAD = thread; 579 // resolve field 580 fieldDescriptor info; 581 constantPoolHandle pool(thread, method(thread)->constants()); 582 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 583 bytecode == Bytecodes::_putstatic); 584 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 585 586 { 587 JvmtiHideSingleStepping jhss(thread); 588 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 589 bytecode, CHECK); 590 } // end JvmtiHideSingleStepping 591 592 // check if link resolution caused cpCache to be updated 593 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 594 if (cp_cache_entry->is_resolved(bytecode)) return; 595 596 // compute auxiliary field attributes 597 TosState state = as_TosState(info.field_type()); 598 599 // We need to delay resolving put instructions on final fields 600 // until we actually invoke one. This is required so we throw 601 // exceptions at the correct place. If we do not resolve completely 602 // in the current pass, leaving the put_code set to zero will 603 // cause the next put instruction to reresolve. 604 Bytecodes::Code put_code = (Bytecodes::Code)0; 605 606 // We also need to delay resolving getstatic instructions until the 607 // class is intitialized. This is required so that access to the static 608 // field will call the initialization function every time until the class 609 // is completely initialized ala. in 2.17.5 in JVM Specification. 610 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 611 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 612 !klass->is_initialized()); 613 Bytecodes::Code get_code = (Bytecodes::Code)0; 614 615 if (!uninitialized_static) { 616 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 617 if (is_put || !info.access_flags().is_final()) { 618 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 619 } 620 } 621 622 cp_cache_entry->set_field( 623 get_code, 624 put_code, 625 info.field_holder(), 626 info.index(), 627 info.offset(), 628 state, 629 info.access_flags().is_final(), 630 info.access_flags().is_volatile(), 631 pool->pool_holder() 632 ); 633 } 634 635 636 //------------------------------------------------------------------------------------------------------------------------ 637 // Synchronization 638 // 639 // The interpreter's synchronization code is factored out so that it can 640 // be shared by method invocation and synchronized blocks. 641 //%note synchronization_3 642 643 //%note monitor_1 644 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 645 #ifdef ASSERT 646 thread->last_frame().interpreter_frame_verify_monitor(elem); 647 #endif 648 if (PrintBiasedLockingStatistics) { 649 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 650 } 651 Handle h_obj(thread, elem->obj()); 652 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 653 "must be NULL or an object"); 654 if (UseBiasedLocking) { 655 // Retry fast entry if bias is revoked to avoid unnecessary inflation 656 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 657 } else { 658 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 659 } 660 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 661 "must be NULL or an object"); 662 #ifdef ASSERT 663 thread->last_frame().interpreter_frame_verify_monitor(elem); 664 #endif 665 IRT_END 666 667 668 //%note monitor_1 669 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 670 #ifdef ASSERT 671 thread->last_frame().interpreter_frame_verify_monitor(elem); 672 #endif 673 Handle h_obj(thread, elem->obj()); 674 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 675 "must be NULL or an object"); 676 if (elem == NULL || h_obj()->is_unlocked()) { 677 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 678 } 679 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 680 // Free entry. This must be done here, since a pending exception might be installed on 681 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 682 elem->set_obj(NULL); 683 #ifdef ASSERT 684 thread->last_frame().interpreter_frame_verify_monitor(elem); 685 #endif 686 IRT_END 687 688 689 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 690 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 691 IRT_END 692 693 694 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 695 // Returns an illegal exception to install into the current thread. The 696 // pending_exception flag is cleared so normal exception handling does not 697 // trigger. Any current installed exception will be overwritten. This 698 // method will be called during an exception unwind. 699 700 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 701 Handle exception(thread, thread->vm_result()); 702 assert(exception() != NULL, "vm result should be set"); 703 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 704 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 705 exception = get_preinitialized_exception( 706 SystemDictionary::IllegalMonitorStateException_klass(), 707 CATCH); 708 } 709 thread->set_vm_result(exception()); 710 IRT_END 711 712 713 //------------------------------------------------------------------------------------------------------------------------ 714 // Invokes 715 716 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 717 return method->orig_bytecode_at(method->bci_from(bcp)); 718 IRT_END 719 720 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 721 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 722 IRT_END 723 724 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 725 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 726 IRT_END 727 728 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 729 Thread* THREAD = thread; 730 // extract receiver from the outgoing argument list if necessary 731 Handle receiver(thread, NULL); 732 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 733 ResourceMark rm(thread); 734 methodHandle m (thread, method(thread)); 735 Bytecode_invoke call(m, bci(thread)); 736 Symbol* signature = call.signature(); 737 receiver = Handle(thread, 738 thread->last_frame().interpreter_callee_receiver(signature)); 739 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 740 "sanity check"); 741 assert(receiver.is_null() || 742 !Universe::heap()->is_in_reserved(receiver->klass()), 743 "sanity check"); 744 } 745 746 // resolve method 747 CallInfo info; 748 constantPoolHandle pool(thread, method(thread)->constants()); 749 750 { 751 JvmtiHideSingleStepping jhss(thread); 752 LinkResolver::resolve_invoke(info, receiver, pool, 753 get_index_u2_cpcache(thread, bytecode), bytecode, 754 CHECK); 755 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 756 int retry_count = 0; 757 while (info.resolved_method()->is_old()) { 758 // It is very unlikely that method is redefined more than 100 times 759 // in the middle of resolve. If it is looping here more than 100 times 760 // means then there could be a bug here. 761 guarantee((retry_count++ < 100), 762 "Could not resolve to latest version of redefined method"); 763 // method is redefined in the middle of resolve so re-try. 764 LinkResolver::resolve_invoke(info, receiver, pool, 765 get_index_u2_cpcache(thread, bytecode), bytecode, 766 CHECK); 767 } 768 } 769 } // end JvmtiHideSingleStepping 770 771 // check if link resolution caused cpCache to be updated 772 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 773 if (cp_cache_entry->is_resolved(bytecode)) return; 774 775 if (bytecode == Bytecodes::_invokeinterface) { 776 if (develop_log_is_enabled(Trace, itables)) { 777 ResourceMark rm(thread); 778 log_develop_trace(itables)("Resolving: klass: %s to method: %s", 779 info.resolved_klass()->name()->as_C_string(), 780 info.resolved_method()->name()->as_C_string()); 781 } 782 } 783 #ifdef ASSERT 784 if (bytecode == Bytecodes::_invokeinterface) { 785 if (info.resolved_method()->method_holder() == 786 SystemDictionary::Object_klass()) { 787 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 788 // (see also CallInfo::set_interface for details) 789 assert(info.call_kind() == CallInfo::vtable_call || 790 info.call_kind() == CallInfo::direct_call, ""); 791 methodHandle rm = info.resolved_method(); 792 assert(rm->is_final() || info.has_vtable_index(), 793 "should have been set already"); 794 } else if (!info.resolved_method()->has_itable_index()) { 795 // Resolved something like CharSequence.toString. Use vtable not itable. 796 assert(info.call_kind() != CallInfo::itable_call, ""); 797 } else { 798 // Setup itable entry 799 assert(info.call_kind() == CallInfo::itable_call, ""); 800 int index = info.resolved_method()->itable_index(); 801 assert(info.itable_index() == index, ""); 802 } 803 } else { 804 assert(info.call_kind() == CallInfo::direct_call || 805 info.call_kind() == CallInfo::vtable_call, ""); 806 } 807 #endif 808 switch (info.call_kind()) { 809 case CallInfo::direct_call: 810 cp_cache_entry->set_direct_call( 811 bytecode, 812 info.resolved_method()); 813 break; 814 case CallInfo::vtable_call: 815 cp_cache_entry->set_vtable_call( 816 bytecode, 817 info.resolved_method(), 818 info.vtable_index()); 819 break; 820 case CallInfo::itable_call: 821 cp_cache_entry->set_itable_call( 822 bytecode, 823 info.resolved_method(), 824 info.itable_index()); 825 break; 826 default: ShouldNotReachHere(); 827 } 828 } 829 830 831 // First time execution: Resolve symbols, create a permanent MethodType object. 832 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 833 Thread* THREAD = thread; 834 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 835 836 // resolve method 837 CallInfo info; 838 constantPoolHandle pool(thread, method(thread)->constants()); 839 { 840 JvmtiHideSingleStepping jhss(thread); 841 LinkResolver::resolve_invoke(info, Handle(), pool, 842 get_index_u2_cpcache(thread, bytecode), bytecode, 843 CHECK); 844 } // end JvmtiHideSingleStepping 845 846 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 847 cp_cache_entry->set_method_handle(pool, info); 848 } 849 850 // First time execution: Resolve symbols, create a permanent CallSite object. 851 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 852 Thread* THREAD = thread; 853 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 854 855 //TO DO: consider passing BCI to Java. 856 // int caller_bci = method(thread)->bci_from(bcp(thread)); 857 858 // resolve method 859 CallInfo info; 860 constantPoolHandle pool(thread, method(thread)->constants()); 861 int index = get_index_u4(thread, bytecode); 862 { 863 JvmtiHideSingleStepping jhss(thread); 864 LinkResolver::resolve_invoke(info, Handle(), pool, 865 index, bytecode, CHECK); 866 } // end JvmtiHideSingleStepping 867 868 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 869 cp_cache_entry->set_dynamic_call(pool, info); 870 } 871 872 // This function is the interface to the assembly code. It returns the resolved 873 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 874 // This function will check for redefinition! 875 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 876 switch (bytecode) { 877 case Bytecodes::_getstatic: 878 case Bytecodes::_putstatic: 879 case Bytecodes::_getfield: 880 case Bytecodes::_putfield: 881 resolve_get_put(thread, bytecode); 882 break; 883 case Bytecodes::_invokevirtual: 884 case Bytecodes::_invokespecial: 885 case Bytecodes::_invokestatic: 886 case Bytecodes::_invokeinterface: 887 resolve_invoke(thread, bytecode); 888 break; 889 case Bytecodes::_invokehandle: 890 resolve_invokehandle(thread); 891 break; 892 case Bytecodes::_invokedynamic: 893 resolve_invokedynamic(thread); 894 break; 895 default: 896 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 897 break; 898 } 899 } 900 IRT_END 901 902 //------------------------------------------------------------------------------------------------------------------------ 903 // Miscellaneous 904 905 906 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 907 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 908 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 909 if (branch_bcp != NULL && nm != NULL) { 910 // This was a successful request for an OSR nmethod. Because 911 // frequency_counter_overflow_inner ends with a safepoint check, 912 // nm could have been unloaded so look it up again. It's unsafe 913 // to examine nm directly since it might have been freed and used 914 // for something else. 915 frame fr = thread->last_frame(); 916 Method* method = fr.interpreter_frame_method(); 917 int bci = method->bci_from(fr.interpreter_frame_bcp()); 918 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 919 } 920 #ifndef PRODUCT 921 if (TraceOnStackReplacement) { 922 if (nm != NULL) { 923 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 924 nm->print(); 925 } 926 } 927 #endif 928 return nm; 929 } 930 931 IRT_ENTRY(nmethod*, 932 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 933 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 934 // flag, in case this method triggers classloading which will call into Java. 935 UnlockFlagSaver fs(thread); 936 937 frame fr = thread->last_frame(); 938 assert(fr.is_interpreted_frame(), "must come from interpreter"); 939 methodHandle method(thread, fr.interpreter_frame_method()); 940 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 941 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 942 943 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 944 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 945 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 946 947 if (osr_nm != NULL) { 948 // We may need to do on-stack replacement which requires that no 949 // monitors in the activation are biased because their 950 // BasicObjectLocks will need to migrate during OSR. Force 951 // unbiasing of all monitors in the activation now (even though 952 // the OSR nmethod might be invalidated) because we don't have a 953 // safepoint opportunity later once the migration begins. 954 if (UseBiasedLocking) { 955 ResourceMark rm; 956 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 957 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 958 kptr < fr.interpreter_frame_monitor_begin(); 959 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 960 if( kptr->obj() != NULL ) { 961 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 962 } 963 } 964 BiasedLocking::revoke(objects_to_revoke); 965 } 966 } 967 return osr_nm; 968 IRT_END 969 970 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 971 assert(ProfileInterpreter, "must be profiling interpreter"); 972 int bci = method->bci_from(cur_bcp); 973 MethodData* mdo = method->method_data(); 974 if (mdo == NULL) return 0; 975 return mdo->bci_to_di(bci); 976 IRT_END 977 978 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 979 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 980 // flag, in case this method triggers classloading which will call into Java. 981 UnlockFlagSaver fs(thread); 982 983 assert(ProfileInterpreter, "must be profiling interpreter"); 984 frame fr = thread->last_frame(); 985 assert(fr.is_interpreted_frame(), "must come from interpreter"); 986 methodHandle method(thread, fr.interpreter_frame_method()); 987 Method::build_interpreter_method_data(method, THREAD); 988 if (HAS_PENDING_EXCEPTION) { 989 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 990 CLEAR_PENDING_EXCEPTION; 991 // and fall through... 992 } 993 IRT_END 994 995 996 #ifdef ASSERT 997 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 998 assert(ProfileInterpreter, "must be profiling interpreter"); 999 1000 MethodData* mdo = method->method_data(); 1001 assert(mdo != NULL, "must not be null"); 1002 1003 int bci = method->bci_from(bcp); 1004 1005 address mdp2 = mdo->bci_to_dp(bci); 1006 if (mdp != mdp2) { 1007 ResourceMark rm; 1008 ResetNoHandleMark rnm; // In a LEAF entry. 1009 HandleMark hm; 1010 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1011 int current_di = mdo->dp_to_di(mdp); 1012 int expected_di = mdo->dp_to_di(mdp2); 1013 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1014 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1015 int approx_bci = -1; 1016 if (current_di >= 0) { 1017 approx_bci = mdo->data_at(current_di)->bci(); 1018 } 1019 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1020 mdo->print_on(tty); 1021 method->print_codes(); 1022 } 1023 assert(mdp == mdp2, "wrong mdp"); 1024 IRT_END 1025 #endif // ASSERT 1026 1027 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1028 assert(ProfileInterpreter, "must be profiling interpreter"); 1029 ResourceMark rm(thread); 1030 HandleMark hm(thread); 1031 frame fr = thread->last_frame(); 1032 assert(fr.is_interpreted_frame(), "must come from interpreter"); 1033 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 1034 1035 // Grab a lock to ensure atomic access to setting the return bci and 1036 // the displacement. This can block and GC, invalidating all naked oops. 1037 MutexLocker ml(RetData_lock); 1038 1039 // ProfileData is essentially a wrapper around a derived oop, so we 1040 // need to take the lock before making any ProfileData structures. 1041 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 1042 RetData* rdata = data->as_RetData(); 1043 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1044 fr.interpreter_frame_set_mdp(new_mdp); 1045 IRT_END 1046 1047 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1048 MethodCounters* mcs = Method::build_method_counters(m, thread); 1049 if (HAS_PENDING_EXCEPTION) { 1050 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1051 CLEAR_PENDING_EXCEPTION; 1052 } 1053 return mcs; 1054 IRT_END 1055 1056 1057 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1058 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1059 // stack traversal automatically takes care of preserving arguments for invoke, so 1060 // this is no longer needed. 1061 1062 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1063 // if this is called during a safepoint 1064 1065 if (JvmtiExport::should_post_single_step()) { 1066 // We are called during regular safepoints and when the VM is 1067 // single stepping. If any thread is marked for single stepping, 1068 // then we may have JVMTI work to do. 1069 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1070 } 1071 IRT_END 1072 1073 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1074 ConstantPoolCacheEntry *cp_entry)) 1075 1076 // check the access_flags for the field in the klass 1077 1078 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1079 int index = cp_entry->field_index(); 1080 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1081 1082 bool is_static = (obj == NULL); 1083 HandleMark hm(thread); 1084 1085 Handle h_obj; 1086 if (!is_static) { 1087 // non-static field accessors have an object, but we need a handle 1088 h_obj = Handle(thread, obj); 1089 } 1090 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1091 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1092 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1093 IRT_END 1094 1095 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1096 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1097 1098 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1099 1100 // check the access_flags for the field in the klass 1101 InstanceKlass* ik = InstanceKlass::cast(k); 1102 int index = cp_entry->field_index(); 1103 // bail out if field modifications are not watched 1104 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1105 1106 char sig_type = '\0'; 1107 1108 switch(cp_entry->flag_state()) { 1109 case btos: sig_type = 'Z'; break; 1110 case ctos: sig_type = 'C'; break; 1111 case stos: sig_type = 'S'; break; 1112 case itos: sig_type = 'I'; break; 1113 case ftos: sig_type = 'F'; break; 1114 case atos: sig_type = 'L'; break; 1115 case ltos: sig_type = 'J'; break; 1116 case dtos: sig_type = 'D'; break; 1117 default: ShouldNotReachHere(); return; 1118 } 1119 bool is_static = (obj == NULL); 1120 1121 HandleMark hm(thread); 1122 instanceKlassHandle h_klass(thread, k); 1123 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1124 jvalue fvalue; 1125 #ifdef _LP64 1126 fvalue = *value; 1127 #else 1128 // Long/double values are stored unaligned and also noncontiguously with 1129 // tagged stacks. We can't just do a simple assignment even in the non- 1130 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1131 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1132 // We assume that the two halves of longs/doubles are stored in interpreter 1133 // stack slots in platform-endian order. 1134 jlong_accessor u; 1135 jint* newval = (jint*)value; 1136 u.words[0] = newval[0]; 1137 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1138 fvalue.j = u.long_value; 1139 #endif // _LP64 1140 1141 Handle h_obj; 1142 if (!is_static) { 1143 // non-static field accessors have an object, but we need a handle 1144 h_obj = Handle(thread, obj); 1145 } 1146 1147 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1148 fid, sig_type, &fvalue); 1149 IRT_END 1150 1151 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1152 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1153 IRT_END 1154 1155 1156 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1157 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1158 IRT_END 1159 1160 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1161 { 1162 return (Interpreter::contains(pc) ? 1 : 0); 1163 } 1164 IRT_END 1165 1166 1167 // Implementation of SignatureHandlerLibrary 1168 1169 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1170 // Dummy definition (else normalization method is defined in CPU 1171 // dependant code) 1172 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1173 return fingerprint; 1174 } 1175 #endif 1176 1177 address SignatureHandlerLibrary::set_handler_blob() { 1178 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1179 if (handler_blob == NULL) { 1180 return NULL; 1181 } 1182 address handler = handler_blob->code_begin(); 1183 _handler_blob = handler_blob; 1184 _handler = handler; 1185 return handler; 1186 } 1187 1188 void SignatureHandlerLibrary::initialize() { 1189 if (_fingerprints != NULL) { 1190 return; 1191 } 1192 if (set_handler_blob() == NULL) { 1193 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1194 } 1195 1196 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1197 SignatureHandlerLibrary::buffer_size); 1198 _buffer = bb->code_begin(); 1199 1200 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1201 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1202 } 1203 1204 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1205 address handler = _handler; 1206 int insts_size = buffer->pure_insts_size(); 1207 if (handler + insts_size > _handler_blob->code_end()) { 1208 // get a new handler blob 1209 handler = set_handler_blob(); 1210 } 1211 if (handler != NULL) { 1212 memcpy(handler, buffer->insts_begin(), insts_size); 1213 pd_set_handler(handler); 1214 ICache::invalidate_range(handler, insts_size); 1215 _handler = handler + insts_size; 1216 } 1217 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler); 1218 return handler; 1219 } 1220 1221 void SignatureHandlerLibrary::add(const methodHandle& method) { 1222 if (method->signature_handler() == NULL) { 1223 // use slow signature handler if we can't do better 1224 int handler_index = -1; 1225 // check if we can use customized (fast) signature handler 1226 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1227 // use customized signature handler 1228 MutexLocker mu(SignatureHandlerLibrary_lock); 1229 // make sure data structure is initialized 1230 initialize(); 1231 // lookup method signature's fingerprint 1232 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1233 // allow CPU dependant code to optimize the fingerprints for the fast handler 1234 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1235 handler_index = _fingerprints->find(fingerprint); 1236 // create handler if necessary 1237 if (handler_index < 0) { 1238 ResourceMark rm; 1239 ptrdiff_t align_offset = (address) 1240 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1241 CodeBuffer buffer((address)(_buffer + align_offset), 1242 SignatureHandlerLibrary::buffer_size - align_offset); 1243 if (!CodeCacheExtensions::support_dynamic_code()) { 1244 // we need a name for the signature (for lookups or saving) 1245 const int SYMBOL_SIZE = 50; 1246 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE); 1247 // support for named signatures 1248 jio_snprintf(symbolName, SYMBOL_SIZE, 1249 "native_" UINT64_FORMAT, fingerprint); 1250 buffer.set_name(symbolName); 1251 } 1252 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1253 // copy into code heap 1254 address handler = set_handler(&buffer); 1255 if (handler == NULL) { 1256 // use slow signature handler (without memorizing it in the fingerprints) 1257 } else { 1258 // debugging suppport 1259 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1260 tty->cr(); 1261 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1262 _handlers->length(), 1263 (method->is_static() ? "static" : "receiver"), 1264 method->name_and_sig_as_C_string(), 1265 fingerprint, 1266 buffer.insts_size()); 1267 if (buffer.insts_size() > 0) { 1268 // buffer may be empty for pregenerated handlers 1269 Disassembler::decode(handler, handler + buffer.insts_size()); 1270 } 1271 #ifndef PRODUCT 1272 address rh_begin = Interpreter::result_handler(method()->result_type()); 1273 if (CodeCache::contains(rh_begin)) { 1274 // else it might be special platform dependent values 1275 tty->print_cr(" --- associated result handler ---"); 1276 address rh_end = rh_begin; 1277 while (*(int*)rh_end != 0) { 1278 rh_end += sizeof(int); 1279 } 1280 Disassembler::decode(rh_begin, rh_end); 1281 } else { 1282 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1283 } 1284 #endif 1285 } 1286 // add handler to library 1287 _fingerprints->append(fingerprint); 1288 _handlers->append(handler); 1289 // set handler index 1290 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1291 handler_index = _fingerprints->length() - 1; 1292 } 1293 } 1294 // Set handler under SignatureHandlerLibrary_lock 1295 if (handler_index < 0) { 1296 // use generic signature handler 1297 method->set_signature_handler(Interpreter::slow_signature_handler()); 1298 } else { 1299 // set handler 1300 method->set_signature_handler(_handlers->at(handler_index)); 1301 } 1302 } else { 1303 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1304 // use generic signature handler 1305 method->set_signature_handler(Interpreter::slow_signature_handler()); 1306 } 1307 } 1308 #ifdef ASSERT 1309 int handler_index = -1; 1310 int fingerprint_index = -2; 1311 { 1312 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1313 // in any way if accessed from multiple threads. To avoid races with another 1314 // thread which may change the arrays in the above, mutex protected block, we 1315 // have to protect this read access here with the same mutex as well! 1316 MutexLocker mu(SignatureHandlerLibrary_lock); 1317 if (_handlers != NULL) { 1318 handler_index = _handlers->find(method->signature_handler()); 1319 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1320 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1321 fingerprint_index = _fingerprints->find(fingerprint); 1322 } 1323 } 1324 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1325 handler_index == fingerprint_index, "sanity check"); 1326 #endif // ASSERT 1327 } 1328 1329 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1330 int handler_index = -1; 1331 // use customized signature handler 1332 MutexLocker mu(SignatureHandlerLibrary_lock); 1333 // make sure data structure is initialized 1334 initialize(); 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 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1340 tty->cr(); 1341 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1342 _handlers->length(), 1343 p2i(handler), 1344 fingerprint); 1345 } 1346 _fingerprints->append(fingerprint); 1347 _handlers->append(handler); 1348 } else { 1349 if (PrintSignatureHandlers) { 1350 tty->cr(); 1351 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1352 _handlers->length(), 1353 fingerprint, 1354 p2i(_handlers->at(handler_index)), 1355 p2i(handler)); 1356 } 1357 } 1358 } 1359 1360 1361 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1362 address SignatureHandlerLibrary::_handler = NULL; 1363 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1364 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1365 address SignatureHandlerLibrary::_buffer = NULL; 1366 1367 1368 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1369 methodHandle m(thread, method); 1370 assert(m->is_native(), "sanity check"); 1371 // lookup native function entry point if it doesn't exist 1372 bool in_base_library; 1373 if (!m->has_native_function()) { 1374 NativeLookup::lookup(m, in_base_library, CHECK); 1375 } 1376 // make sure signature handler is installed 1377 SignatureHandlerLibrary::add(m); 1378 // The interpreter entry point checks the signature handler first, 1379 // before trying to fetch the native entry point and klass mirror. 1380 // We must set the signature handler last, so that multiple processors 1381 // preparing the same method will be sure to see non-null entry & mirror. 1382 IRT_END 1383 1384 #if defined(IA32) || defined(AMD64) || defined(ARM) 1385 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1386 if (src_address == dest_address) { 1387 return; 1388 } 1389 ResetNoHandleMark rnm; // In a LEAF entry. 1390 HandleMark hm; 1391 ResourceMark rm; 1392 frame fr = thread->last_frame(); 1393 assert(fr.is_interpreted_frame(), ""); 1394 jint bci = fr.interpreter_frame_bci(); 1395 methodHandle mh(thread, fr.interpreter_frame_method()); 1396 Bytecode_invoke invoke(mh, bci); 1397 ArgumentSizeComputer asc(invoke.signature()); 1398 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1399 Copy::conjoint_jbytes(src_address, dest_address, 1400 size_of_arguments * Interpreter::stackElementSize); 1401 IRT_END 1402 #endif 1403 1404 #if INCLUDE_JVMTI 1405 // This is a support of the JVMTI PopFrame interface. 1406 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1407 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1408 // The member_name argument is a saved reference (in local#0) to the member_name. 1409 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1410 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1411 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1412 Method* method, address bcp)) 1413 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1414 if (code != Bytecodes::_invokestatic) { 1415 return; 1416 } 1417 ConstantPool* cpool = method->constants(); 1418 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1419 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1420 Symbol* mname = cpool->name_ref_at(cp_index); 1421 1422 if (MethodHandles::has_member_arg(cname, mname)) { 1423 oop member_name_oop = (oop) member_name; 1424 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1425 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1426 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1427 } 1428 thread->set_vm_result(member_name_oop); 1429 } else { 1430 thread->set_vm_result(NULL); 1431 } 1432 IRT_END 1433 #endif // INCLUDE_JVMTI