1 /* 2 * Copyright (c) 1997, 2016, 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()); 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 stringStream tempst; 463 tempst.print("interpreter method <%s>\n" 464 " at bci %d for thread " INTPTR_FORMAT, 465 h_method->print_value_string(), current_bci, p2i(thread)); 466 Exceptions::log_exception(h_exception, tempst); 467 } 468 // Don't go paging in something which won't be used. 469 // else if (extable->length() == 0) { 470 // // disabled for now - interpreter is not using shortcut yet 471 // // (shortcut is not to call runtime if we have no exception handlers) 472 // // warning("performance bug: should not call runtime if method has no exception handlers"); 473 // } 474 // for AbortVMOnException flag 475 Exceptions::debug_check_abort(h_exception); 476 477 // exception handler lookup 478 KlassHandle h_klass(THREAD, h_exception->klass()); 479 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 480 if (HAS_PENDING_EXCEPTION) { 481 // We threw an exception while trying to find the exception handler. 482 // Transfer the new exception to the exception handle which will 483 // be set into thread local storage, and do another lookup for an 484 // exception handler for this exception, this time starting at the 485 // BCI of the exception handler which caused the exception to be 486 // thrown (bug 4307310). 487 h_exception = Handle(THREAD, PENDING_EXCEPTION); 488 CLEAR_PENDING_EXCEPTION; 489 if (handler_bci >= 0) { 490 current_bci = handler_bci; 491 should_repeat = true; 492 } 493 } 494 } while (should_repeat == true); 495 496 #if INCLUDE_JVMCI 497 if (EnableJVMCI && h_method->method_data() != NULL) { 498 ResourceMark rm(thread); 499 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 500 if (pdata != NULL && pdata->is_BitData()) { 501 BitData* bit_data = (BitData*) pdata; 502 bit_data->set_exception_seen(); 503 } 504 } 505 #endif 506 507 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 508 // time throw or a stack unwinding throw and accordingly notify the debugger 509 if (JvmtiExport::can_post_on_exceptions()) { 510 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 511 } 512 513 #ifdef CC_INTERP 514 address continuation = (address)(intptr_t) handler_bci; 515 #else 516 address continuation = NULL; 517 #endif 518 address handler_pc = NULL; 519 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 520 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 521 // handler in this method, or (b) after a stack overflow there is not yet 522 // enough stack space available to reprotect the stack. 523 #ifndef CC_INTERP 524 continuation = Interpreter::remove_activation_entry(); 525 #endif 526 #if COMPILER2_OR_JVMCI 527 // Count this for compilation purposes 528 h_method->interpreter_throwout_increment(THREAD); 529 #endif 530 } else { 531 // handler in this method => change bci/bcp to handler bci/bcp and continue there 532 handler_pc = h_method->code_base() + handler_bci; 533 #ifndef CC_INTERP 534 set_bcp_and_mdp(handler_pc, thread); 535 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 536 #endif 537 } 538 // notify debugger of an exception catch 539 // (this is good for exceptions caught in native methods as well) 540 if (JvmtiExport::can_post_on_exceptions()) { 541 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 542 } 543 544 thread->set_vm_result(h_exception()); 545 return continuation; 546 IRT_END 547 548 549 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 550 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 551 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 552 IRT_END 553 554 555 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 556 THROW(vmSymbols::java_lang_AbstractMethodError()); 557 IRT_END 558 559 560 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 561 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 562 IRT_END 563 564 565 //------------------------------------------------------------------------------------------------------------------------ 566 // Fields 567 // 568 569 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 570 Thread* THREAD = thread; 571 // resolve field 572 fieldDescriptor info; 573 constantPoolHandle pool(thread, method(thread)->constants()); 574 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 575 bytecode == Bytecodes::_putstatic); 576 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 577 578 { 579 JvmtiHideSingleStepping jhss(thread); 580 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 581 bytecode, CHECK); 582 } // end JvmtiHideSingleStepping 583 584 // check if link resolution caused cpCache to be updated 585 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 586 if (cp_cache_entry->is_resolved(bytecode)) return; 587 588 // compute auxiliary field attributes 589 TosState state = as_TosState(info.field_type()); 590 591 // We need to delay resolving put instructions on final fields 592 // until we actually invoke one. This is required so we throw 593 // exceptions at the correct place. If we do not resolve completely 594 // in the current pass, leaving the put_code set to zero will 595 // cause the next put instruction to reresolve. 596 Bytecodes::Code put_code = (Bytecodes::Code)0; 597 598 // We also need to delay resolving getstatic instructions until the 599 // class is intitialized. This is required so that access to the static 600 // field will call the initialization function every time until the class 601 // is completely initialized ala. in 2.17.5 in JVM Specification. 602 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 603 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 604 !klass->is_initialized()); 605 Bytecodes::Code get_code = (Bytecodes::Code)0; 606 607 if (!uninitialized_static) { 608 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 609 if (is_put || !info.access_flags().is_final()) { 610 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 611 } 612 } 613 614 cp_cache_entry->set_field( 615 get_code, 616 put_code, 617 info.field_holder(), 618 info.index(), 619 info.offset(), 620 state, 621 info.access_flags().is_final(), 622 info.access_flags().is_volatile(), 623 pool->pool_holder() 624 ); 625 } 626 627 628 //------------------------------------------------------------------------------------------------------------------------ 629 // Synchronization 630 // 631 // The interpreter's synchronization code is factored out so that it can 632 // be shared by method invocation and synchronized blocks. 633 //%note synchronization_3 634 635 //%note monitor_1 636 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 637 #ifdef ASSERT 638 thread->last_frame().interpreter_frame_verify_monitor(elem); 639 #endif 640 if (PrintBiasedLockingStatistics) { 641 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 642 } 643 Handle h_obj(thread, elem->obj()); 644 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 645 "must be NULL or an object"); 646 if (UseBiasedLocking) { 647 // Retry fast entry if bias is revoked to avoid unnecessary inflation 648 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 649 } else { 650 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 651 } 652 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 653 "must be NULL or an object"); 654 #ifdef ASSERT 655 thread->last_frame().interpreter_frame_verify_monitor(elem); 656 #endif 657 IRT_END 658 659 660 //%note monitor_1 661 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 662 #ifdef ASSERT 663 thread->last_frame().interpreter_frame_verify_monitor(elem); 664 #endif 665 Handle h_obj(thread, elem->obj()); 666 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 667 "must be NULL or an object"); 668 if (elem == NULL || h_obj()->is_unlocked()) { 669 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 670 } 671 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 672 // Free entry. This must be done here, since a pending exception might be installed on 673 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 674 elem->set_obj(NULL); 675 #ifdef ASSERT 676 thread->last_frame().interpreter_frame_verify_monitor(elem); 677 #endif 678 IRT_END 679 680 681 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 682 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 683 IRT_END 684 685 686 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 687 // Returns an illegal exception to install into the current thread. The 688 // pending_exception flag is cleared so normal exception handling does not 689 // trigger. Any current installed exception will be overwritten. This 690 // method will be called during an exception unwind. 691 692 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 693 Handle exception(thread, thread->vm_result()); 694 assert(exception() != NULL, "vm result should be set"); 695 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 696 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 697 exception = get_preinitialized_exception( 698 SystemDictionary::IllegalMonitorStateException_klass(), 699 CATCH); 700 } 701 thread->set_vm_result(exception()); 702 IRT_END 703 704 705 //------------------------------------------------------------------------------------------------------------------------ 706 // Invokes 707 708 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 709 return method->orig_bytecode_at(method->bci_from(bcp)); 710 IRT_END 711 712 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 713 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 714 IRT_END 715 716 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 717 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 718 IRT_END 719 720 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 721 Thread* THREAD = thread; 722 // extract receiver from the outgoing argument list if necessary 723 Handle receiver(thread, NULL); 724 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 725 ResourceMark rm(thread); 726 methodHandle m (thread, method(thread)); 727 Bytecode_invoke call(m, bci(thread)); 728 Symbol* signature = call.signature(); 729 receiver = Handle(thread, 730 thread->last_frame().interpreter_callee_receiver(signature)); 731 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 732 "sanity check"); 733 assert(receiver.is_null() || 734 !Universe::heap()->is_in_reserved(receiver->klass()), 735 "sanity check"); 736 } 737 738 // resolve method 739 CallInfo info; 740 constantPoolHandle pool(thread, method(thread)->constants()); 741 742 { 743 JvmtiHideSingleStepping jhss(thread); 744 LinkResolver::resolve_invoke(info, receiver, pool, 745 get_index_u2_cpcache(thread, bytecode), bytecode, 746 CHECK); 747 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 748 int retry_count = 0; 749 while (info.resolved_method()->is_old()) { 750 // It is very unlikely that method is redefined more than 100 times 751 // in the middle of resolve. If it is looping here more than 100 times 752 // means then there could be a bug here. 753 guarantee((retry_count++ < 100), 754 "Could not resolve to latest version of redefined method"); 755 // method is redefined in the middle of resolve so re-try. 756 LinkResolver::resolve_invoke(info, receiver, pool, 757 get_index_u2_cpcache(thread, bytecode), bytecode, 758 CHECK); 759 } 760 } 761 } // end JvmtiHideSingleStepping 762 763 // check if link resolution caused cpCache to be updated 764 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 765 if (cp_cache_entry->is_resolved(bytecode)) return; 766 767 #ifdef ASSERT 768 if (bytecode == Bytecodes::_invokeinterface) { 769 if (info.resolved_method()->method_holder() == 770 SystemDictionary::Object_klass()) { 771 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 772 // (see also CallInfo::set_interface for details) 773 assert(info.call_kind() == CallInfo::vtable_call || 774 info.call_kind() == CallInfo::direct_call, ""); 775 methodHandle rm = info.resolved_method(); 776 assert(rm->is_final() || info.has_vtable_index(), 777 "should have been set already"); 778 } else if (!info.resolved_method()->has_itable_index()) { 779 // Resolved something like CharSequence.toString. Use vtable not itable. 780 assert(info.call_kind() != CallInfo::itable_call, ""); 781 } else { 782 // Setup itable entry 783 assert(info.call_kind() == CallInfo::itable_call, ""); 784 int index = info.resolved_method()->itable_index(); 785 assert(info.itable_index() == index, ""); 786 } 787 } else { 788 assert(info.call_kind() == CallInfo::direct_call || 789 info.call_kind() == CallInfo::vtable_call, ""); 790 } 791 #endif 792 switch (info.call_kind()) { 793 case CallInfo::direct_call: 794 cp_cache_entry->set_direct_call( 795 bytecode, 796 info.resolved_method()); 797 break; 798 case CallInfo::vtable_call: 799 cp_cache_entry->set_vtable_call( 800 bytecode, 801 info.resolved_method(), 802 info.vtable_index()); 803 break; 804 case CallInfo::itable_call: 805 cp_cache_entry->set_itable_call( 806 bytecode, 807 info.resolved_method(), 808 info.itable_index()); 809 break; 810 default: ShouldNotReachHere(); 811 } 812 } 813 814 815 // First time execution: Resolve symbols, create a permanent MethodType object. 816 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 817 Thread* THREAD = thread; 818 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 819 820 // resolve method 821 CallInfo info; 822 constantPoolHandle pool(thread, method(thread)->constants()); 823 { 824 JvmtiHideSingleStepping jhss(thread); 825 LinkResolver::resolve_invoke(info, Handle(), pool, 826 get_index_u2_cpcache(thread, bytecode), bytecode, 827 CHECK); 828 } // end JvmtiHideSingleStepping 829 830 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 831 cp_cache_entry->set_method_handle(pool, info); 832 } 833 834 // First time execution: Resolve symbols, create a permanent CallSite object. 835 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 836 Thread* THREAD = thread; 837 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 838 839 //TO DO: consider passing BCI to Java. 840 // int caller_bci = method(thread)->bci_from(bcp(thread)); 841 842 // resolve method 843 CallInfo info; 844 constantPoolHandle pool(thread, method(thread)->constants()); 845 int index = get_index_u4(thread, bytecode); 846 { 847 JvmtiHideSingleStepping jhss(thread); 848 LinkResolver::resolve_invoke(info, Handle(), pool, 849 index, bytecode, CHECK); 850 } // end JvmtiHideSingleStepping 851 852 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 853 cp_cache_entry->set_dynamic_call(pool, info); 854 } 855 856 // This function is the interface to the assembly code. It returns the resolved 857 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 858 // This function will check for redefinition! 859 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 860 switch (bytecode) { 861 case Bytecodes::_getstatic: 862 case Bytecodes::_putstatic: 863 case Bytecodes::_getfield: 864 case Bytecodes::_putfield: 865 resolve_get_put(thread, bytecode); 866 break; 867 case Bytecodes::_invokevirtual: 868 case Bytecodes::_invokespecial: 869 case Bytecodes::_invokestatic: 870 case Bytecodes::_invokeinterface: 871 resolve_invoke(thread, bytecode); 872 break; 873 case Bytecodes::_invokehandle: 874 resolve_invokehandle(thread); 875 break; 876 case Bytecodes::_invokedynamic: 877 resolve_invokedynamic(thread); 878 break; 879 default: 880 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 881 break; 882 } 883 } 884 IRT_END 885 886 //------------------------------------------------------------------------------------------------------------------------ 887 // Miscellaneous 888 889 890 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 891 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 892 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 893 if (branch_bcp != NULL && nm != NULL) { 894 // This was a successful request for an OSR nmethod. Because 895 // frequency_counter_overflow_inner ends with a safepoint check, 896 // nm could have been unloaded so look it up again. It's unsafe 897 // to examine nm directly since it might have been freed and used 898 // for something else. 899 frame fr = thread->last_frame(); 900 Method* method = fr.interpreter_frame_method(); 901 int bci = method->bci_from(fr.interpreter_frame_bcp()); 902 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 903 } 904 #ifndef PRODUCT 905 if (TraceOnStackReplacement) { 906 if (nm != NULL) { 907 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 908 nm->print(); 909 } 910 } 911 #endif 912 return nm; 913 } 914 915 IRT_ENTRY(nmethod*, 916 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 917 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 918 // flag, in case this method triggers classloading which will call into Java. 919 UnlockFlagSaver fs(thread); 920 921 frame fr = thread->last_frame(); 922 assert(fr.is_interpreted_frame(), "must come from interpreter"); 923 methodHandle method(thread, fr.interpreter_frame_method()); 924 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 925 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 926 927 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 928 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 929 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 930 931 if (osr_nm != NULL) { 932 // We may need to do on-stack replacement which requires that no 933 // monitors in the activation are biased because their 934 // BasicObjectLocks will need to migrate during OSR. Force 935 // unbiasing of all monitors in the activation now (even though 936 // the OSR nmethod might be invalidated) because we don't have a 937 // safepoint opportunity later once the migration begins. 938 if (UseBiasedLocking) { 939 ResourceMark rm; 940 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 941 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 942 kptr < fr.interpreter_frame_monitor_begin(); 943 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 944 if( kptr->obj() != NULL ) { 945 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 946 } 947 } 948 BiasedLocking::revoke(objects_to_revoke); 949 } 950 } 951 return osr_nm; 952 IRT_END 953 954 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 955 assert(ProfileInterpreter, "must be profiling interpreter"); 956 int bci = method->bci_from(cur_bcp); 957 MethodData* mdo = method->method_data(); 958 if (mdo == NULL) return 0; 959 return mdo->bci_to_di(bci); 960 IRT_END 961 962 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 963 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 964 // flag, in case this method triggers classloading which will call into Java. 965 UnlockFlagSaver fs(thread); 966 967 assert(ProfileInterpreter, "must be profiling interpreter"); 968 frame fr = thread->last_frame(); 969 assert(fr.is_interpreted_frame(), "must come from interpreter"); 970 methodHandle method(thread, fr.interpreter_frame_method()); 971 Method::build_interpreter_method_data(method, THREAD); 972 if (HAS_PENDING_EXCEPTION) { 973 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 974 CLEAR_PENDING_EXCEPTION; 975 // and fall through... 976 } 977 IRT_END 978 979 980 #ifdef ASSERT 981 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 982 assert(ProfileInterpreter, "must be profiling interpreter"); 983 984 MethodData* mdo = method->method_data(); 985 assert(mdo != NULL, "must not be null"); 986 987 int bci = method->bci_from(bcp); 988 989 address mdp2 = mdo->bci_to_dp(bci); 990 if (mdp != mdp2) { 991 ResourceMark rm; 992 ResetNoHandleMark rnm; // In a LEAF entry. 993 HandleMark hm; 994 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 995 int current_di = mdo->dp_to_di(mdp); 996 int expected_di = mdo->dp_to_di(mdp2); 997 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 998 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 999 int approx_bci = -1; 1000 if (current_di >= 0) { 1001 approx_bci = mdo->data_at(current_di)->bci(); 1002 } 1003 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1004 mdo->print_on(tty); 1005 method->print_codes(); 1006 } 1007 assert(mdp == mdp2, "wrong mdp"); 1008 IRT_END 1009 #endif // ASSERT 1010 1011 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1012 assert(ProfileInterpreter, "must be profiling interpreter"); 1013 ResourceMark rm(thread); 1014 HandleMark hm(thread); 1015 frame fr = thread->last_frame(); 1016 assert(fr.is_interpreted_frame(), "must come from interpreter"); 1017 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 1018 1019 // Grab a lock to ensure atomic access to setting the return bci and 1020 // the displacement. This can block and GC, invalidating all naked oops. 1021 MutexLocker ml(RetData_lock); 1022 1023 // ProfileData is essentially a wrapper around a derived oop, so we 1024 // need to take the lock before making any ProfileData structures. 1025 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 1026 RetData* rdata = data->as_RetData(); 1027 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1028 fr.interpreter_frame_set_mdp(new_mdp); 1029 IRT_END 1030 1031 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1032 MethodCounters* mcs = Method::build_method_counters(m, thread); 1033 if (HAS_PENDING_EXCEPTION) { 1034 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1035 CLEAR_PENDING_EXCEPTION; 1036 } 1037 return mcs; 1038 IRT_END 1039 1040 1041 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1042 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1043 // stack traversal automatically takes care of preserving arguments for invoke, so 1044 // this is no longer needed. 1045 1046 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1047 // if this is called during a safepoint 1048 1049 if (JvmtiExport::should_post_single_step()) { 1050 // We are called during regular safepoints and when the VM is 1051 // single stepping. If any thread is marked for single stepping, 1052 // then we may have JVMTI work to do. 1053 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1054 } 1055 IRT_END 1056 1057 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1058 ConstantPoolCacheEntry *cp_entry)) 1059 1060 // check the access_flags for the field in the klass 1061 1062 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1063 int index = cp_entry->field_index(); 1064 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1065 1066 bool is_static = (obj == NULL); 1067 HandleMark hm(thread); 1068 1069 Handle h_obj; 1070 if (!is_static) { 1071 // non-static field accessors have an object, but we need a handle 1072 h_obj = Handle(thread, obj); 1073 } 1074 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1075 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1076 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1077 IRT_END 1078 1079 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1080 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1081 1082 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1083 1084 // check the access_flags for the field in the klass 1085 InstanceKlass* ik = InstanceKlass::cast(k); 1086 int index = cp_entry->field_index(); 1087 // bail out if field modifications are not watched 1088 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1089 1090 char sig_type = '\0'; 1091 1092 switch(cp_entry->flag_state()) { 1093 case btos: sig_type = 'Z'; break; 1094 case ctos: sig_type = 'C'; break; 1095 case stos: sig_type = 'S'; break; 1096 case itos: sig_type = 'I'; break; 1097 case ftos: sig_type = 'F'; break; 1098 case atos: sig_type = 'L'; break; 1099 case ltos: sig_type = 'J'; break; 1100 case dtos: sig_type = 'D'; break; 1101 default: ShouldNotReachHere(); return; 1102 } 1103 bool is_static = (obj == NULL); 1104 1105 HandleMark hm(thread); 1106 instanceKlassHandle h_klass(thread, k); 1107 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1108 jvalue fvalue; 1109 #ifdef _LP64 1110 fvalue = *value; 1111 #else 1112 // Long/double values are stored unaligned and also noncontiguously with 1113 // tagged stacks. We can't just do a simple assignment even in the non- 1114 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1115 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1116 // We assume that the two halves of longs/doubles are stored in interpreter 1117 // stack slots in platform-endian order. 1118 jlong_accessor u; 1119 jint* newval = (jint*)value; 1120 u.words[0] = newval[0]; 1121 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1122 fvalue.j = u.long_value; 1123 #endif // _LP64 1124 1125 Handle h_obj; 1126 if (!is_static) { 1127 // non-static field accessors have an object, but we need a handle 1128 h_obj = Handle(thread, obj); 1129 } 1130 1131 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1132 fid, sig_type, &fvalue); 1133 IRT_END 1134 1135 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1136 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1137 IRT_END 1138 1139 1140 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1141 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1142 IRT_END 1143 1144 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1145 { 1146 return (Interpreter::contains(pc) ? 1 : 0); 1147 } 1148 IRT_END 1149 1150 1151 // Implementation of SignatureHandlerLibrary 1152 1153 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1154 // Dummy definition (else normalization method is defined in CPU 1155 // dependant code) 1156 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1157 return fingerprint; 1158 } 1159 #endif 1160 1161 address SignatureHandlerLibrary::set_handler_blob() { 1162 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1163 if (handler_blob == NULL) { 1164 return NULL; 1165 } 1166 address handler = handler_blob->code_begin(); 1167 _handler_blob = handler_blob; 1168 _handler = handler; 1169 return handler; 1170 } 1171 1172 void SignatureHandlerLibrary::initialize() { 1173 if (_fingerprints != NULL) { 1174 return; 1175 } 1176 if (set_handler_blob() == NULL) { 1177 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1178 } 1179 1180 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1181 SignatureHandlerLibrary::buffer_size); 1182 _buffer = bb->code_begin(); 1183 1184 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1185 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1186 } 1187 1188 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1189 address handler = _handler; 1190 int insts_size = buffer->pure_insts_size(); 1191 if (handler + insts_size > _handler_blob->code_end()) { 1192 // get a new handler blob 1193 handler = set_handler_blob(); 1194 } 1195 if (handler != NULL) { 1196 memcpy(handler, buffer->insts_begin(), insts_size); 1197 pd_set_handler(handler); 1198 ICache::invalidate_range(handler, insts_size); 1199 _handler = handler + insts_size; 1200 } 1201 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler); 1202 return handler; 1203 } 1204 1205 void SignatureHandlerLibrary::add(const methodHandle& method) { 1206 if (method->signature_handler() == NULL) { 1207 // use slow signature handler if we can't do better 1208 int handler_index = -1; 1209 // check if we can use customized (fast) signature handler 1210 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1211 // use customized signature handler 1212 MutexLocker mu(SignatureHandlerLibrary_lock); 1213 // make sure data structure is initialized 1214 initialize(); 1215 // lookup method signature's fingerprint 1216 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1217 // allow CPU dependant code to optimize the fingerprints for the fast handler 1218 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1219 handler_index = _fingerprints->find(fingerprint); 1220 // create handler if necessary 1221 if (handler_index < 0) { 1222 ResourceMark rm; 1223 ptrdiff_t align_offset = (address) 1224 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1225 CodeBuffer buffer((address)(_buffer + align_offset), 1226 SignatureHandlerLibrary::buffer_size - align_offset); 1227 if (!CodeCacheExtensions::support_dynamic_code()) { 1228 // we need a name for the signature (for lookups or saving) 1229 const int SYMBOL_SIZE = 50; 1230 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE); 1231 // support for named signatures 1232 jio_snprintf(symbolName, SYMBOL_SIZE, 1233 "native_" UINT64_FORMAT, fingerprint); 1234 buffer.set_name(symbolName); 1235 } 1236 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1237 // copy into code heap 1238 address handler = set_handler(&buffer); 1239 if (handler == NULL) { 1240 // use slow signature handler (without memorizing it in the fingerprints) 1241 } else { 1242 // debugging suppport 1243 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1244 ttyLocker ttyl; 1245 tty->cr(); 1246 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1247 _handlers->length(), 1248 (method->is_static() ? "static" : "receiver"), 1249 method->name_and_sig_as_C_string(), 1250 fingerprint, 1251 buffer.insts_size()); 1252 if (buffer.insts_size() > 0) { 1253 // buffer may be empty for pregenerated handlers 1254 Disassembler::decode(handler, handler + buffer.insts_size()); 1255 } 1256 #ifndef PRODUCT 1257 address rh_begin = Interpreter::result_handler(method()->result_type()); 1258 if (CodeCache::contains(rh_begin)) { 1259 // else it might be special platform dependent values 1260 tty->print_cr(" --- associated result handler ---"); 1261 address rh_end = rh_begin; 1262 while (*(int*)rh_end != 0) { 1263 rh_end += sizeof(int); 1264 } 1265 Disassembler::decode(rh_begin, rh_end); 1266 } else { 1267 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1268 } 1269 #endif 1270 } 1271 // add handler to library 1272 _fingerprints->append(fingerprint); 1273 _handlers->append(handler); 1274 // set handler index 1275 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1276 handler_index = _fingerprints->length() - 1; 1277 } 1278 } 1279 // Set handler under SignatureHandlerLibrary_lock 1280 if (handler_index < 0) { 1281 // use generic signature handler 1282 method->set_signature_handler(Interpreter::slow_signature_handler()); 1283 } else { 1284 // set handler 1285 method->set_signature_handler(_handlers->at(handler_index)); 1286 } 1287 } else { 1288 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1289 // use generic signature handler 1290 method->set_signature_handler(Interpreter::slow_signature_handler()); 1291 } 1292 } 1293 #ifdef ASSERT 1294 int handler_index = -1; 1295 int fingerprint_index = -2; 1296 { 1297 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1298 // in any way if accessed from multiple threads. To avoid races with another 1299 // thread which may change the arrays in the above, mutex protected block, we 1300 // have to protect this read access here with the same mutex as well! 1301 MutexLocker mu(SignatureHandlerLibrary_lock); 1302 if (_handlers != NULL) { 1303 handler_index = _handlers->find(method->signature_handler()); 1304 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1305 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1306 fingerprint_index = _fingerprints->find(fingerprint); 1307 } 1308 } 1309 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1310 handler_index == fingerprint_index, "sanity check"); 1311 #endif // ASSERT 1312 } 1313 1314 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1315 int handler_index = -1; 1316 // use customized signature handler 1317 MutexLocker mu(SignatureHandlerLibrary_lock); 1318 // make sure data structure is initialized 1319 initialize(); 1320 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1321 handler_index = _fingerprints->find(fingerprint); 1322 // create handler if necessary 1323 if (handler_index < 0) { 1324 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1325 tty->cr(); 1326 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1327 _handlers->length(), 1328 p2i(handler), 1329 fingerprint); 1330 } 1331 _fingerprints->append(fingerprint); 1332 _handlers->append(handler); 1333 } else { 1334 if (PrintSignatureHandlers) { 1335 tty->cr(); 1336 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1337 _handlers->length(), 1338 fingerprint, 1339 p2i(_handlers->at(handler_index)), 1340 p2i(handler)); 1341 } 1342 } 1343 } 1344 1345 1346 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1347 address SignatureHandlerLibrary::_handler = NULL; 1348 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1349 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1350 address SignatureHandlerLibrary::_buffer = NULL; 1351 1352 1353 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1354 methodHandle m(thread, method); 1355 assert(m->is_native(), "sanity check"); 1356 // lookup native function entry point if it doesn't exist 1357 bool in_base_library; 1358 if (!m->has_native_function()) { 1359 NativeLookup::lookup(m, in_base_library, CHECK); 1360 } 1361 // make sure signature handler is installed 1362 SignatureHandlerLibrary::add(m); 1363 // The interpreter entry point checks the signature handler first, 1364 // before trying to fetch the native entry point and klass mirror. 1365 // We must set the signature handler last, so that multiple processors 1366 // preparing the same method will be sure to see non-null entry & mirror. 1367 IRT_END 1368 1369 #if defined(IA32) || defined(AMD64) || defined(ARM) 1370 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1371 if (src_address == dest_address) { 1372 return; 1373 } 1374 ResetNoHandleMark rnm; // In a LEAF entry. 1375 HandleMark hm; 1376 ResourceMark rm; 1377 frame fr = thread->last_frame(); 1378 assert(fr.is_interpreted_frame(), ""); 1379 jint bci = fr.interpreter_frame_bci(); 1380 methodHandle mh(thread, fr.interpreter_frame_method()); 1381 Bytecode_invoke invoke(mh, bci); 1382 ArgumentSizeComputer asc(invoke.signature()); 1383 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1384 Copy::conjoint_jbytes(src_address, dest_address, 1385 size_of_arguments * Interpreter::stackElementSize); 1386 IRT_END 1387 #endif 1388 1389 #if INCLUDE_JVMTI 1390 // This is a support of the JVMTI PopFrame interface. 1391 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1392 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1393 // The member_name argument is a saved reference (in local#0) to the member_name. 1394 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1395 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1396 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1397 Method* method, address bcp)) 1398 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1399 if (code != Bytecodes::_invokestatic) { 1400 return; 1401 } 1402 ConstantPool* cpool = method->constants(); 1403 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1404 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1405 Symbol* mname = cpool->name_ref_at(cp_index); 1406 1407 if (MethodHandles::has_member_arg(cname, mname)) { 1408 oop member_name_oop = (oop) member_name; 1409 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1410 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1411 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1412 } 1413 thread->set_vm_result(member_name_oop); 1414 } else { 1415 thread->set_vm_result(NULL); 1416 } 1417 IRT_END 1418 #endif // INCLUDE_JVMTI