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/resourceArea.hpp" 41 #include "memory/universe.inline.hpp" 42 #include "oops/constantPool.hpp" 43 #include "oops/instanceKlass.hpp" 44 #include "oops/methodData.hpp" 45 #include "oops/objArrayKlass.hpp" 46 #include "oops/objArrayOop.inline.hpp" 47 #include "oops/oop.inline.hpp" 48 #include "oops/symbol.hpp" 49 #include "prims/jvmtiExport.hpp" 50 #include "prims/nativeLookup.hpp" 51 #include "runtime/atomic.inline.hpp" 52 #include "runtime/biasedLocking.hpp" 53 #include "runtime/compilationPolicy.hpp" 54 #include "runtime/deoptimization.hpp" 55 #include "runtime/fieldDescriptor.hpp" 56 #include "runtime/handles.inline.hpp" 57 #include "runtime/icache.hpp" 58 #include "runtime/interfaceSupport.hpp" 59 #include "runtime/java.hpp" 60 #include "runtime/jfieldIDWorkaround.hpp" 61 #include "runtime/osThread.hpp" 62 #include "runtime/sharedRuntime.hpp" 63 #include "runtime/stubRoutines.hpp" 64 #include "runtime/synchronizer.hpp" 65 #include "runtime/threadCritical.hpp" 66 #include "utilities/events.hpp" 67 #ifdef COMPILER2 68 #include "opto/runtime.hpp" 69 #endif 70 71 class UnlockFlagSaver { 72 private: 73 JavaThread* _thread; 74 bool _do_not_unlock; 75 public: 76 UnlockFlagSaver(JavaThread* t) { 77 _thread = t; 78 _do_not_unlock = t->do_not_unlock_if_synchronized(); 79 t->set_do_not_unlock_if_synchronized(false); 80 } 81 ~UnlockFlagSaver() { 82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 83 } 84 }; 85 86 //------------------------------------------------------------------------------------------------------------------------ 87 // State accessors 88 89 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 90 last_frame(thread).interpreter_frame_set_bcp(bcp); 91 if (ProfileInterpreter) { 92 // ProfileTraps uses MDOs independently of ProfileInterpreter. 93 // That is why we must check both ProfileInterpreter and mdo != NULL. 94 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 95 if (mdo != NULL) { 96 NEEDS_CLEANUP; 97 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 98 } 99 } 100 } 101 102 //------------------------------------------------------------------------------------------------------------------------ 103 // Constants 104 105 106 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 107 // access constant pool 108 ConstantPool* pool = method(thread)->constants(); 109 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 110 constantTag tag = pool->tag_at(index); 111 112 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 113 Klass* klass = pool->klass_at(index, CHECK); 114 oop java_class = klass->java_mirror(); 115 thread->set_vm_result(java_class); 116 IRT_END 117 118 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 119 assert(bytecode == Bytecodes::_fast_aldc || 120 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 121 ResourceMark rm(thread); 122 methodHandle m (thread, method(thread)); 123 Bytecode_loadconstant ldc(m, bci(thread)); 124 oop result = ldc.resolve_constant(CHECK); 125 #ifdef ASSERT 126 { 127 // The bytecode wrappers aren't GC-safe so construct a new one 128 Bytecode_loadconstant ldc2(m, bci(thread)); 129 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 130 assert(result == coop, "expected result for assembly code"); 131 } 132 #endif 133 thread->set_vm_result(result); 134 } 135 IRT_END 136 137 138 //------------------------------------------------------------------------------------------------------------------------ 139 // Allocation 140 141 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 142 Klass* k_oop = pool->klass_at(index, CHECK); 143 instanceKlassHandle klass (THREAD, k_oop); 144 145 // Make sure we are not instantiating an abstract klass 146 klass->check_valid_for_instantiation(true, CHECK); 147 148 // Make sure klass is initialized 149 klass->initialize(CHECK); 150 151 // At this point the class may not be fully initialized 152 // because of recursive initialization. If it is fully 153 // initialized & has_finalized is not set, we rewrite 154 // it into its fast version (Note: no locking is needed 155 // here since this is an atomic byte write and can be 156 // done more than once). 157 // 158 // Note: In case of classes with has_finalized we don't 159 // rewrite since that saves us an extra check in 160 // the fast version which then would call the 161 // slow version anyway (and do a call back into 162 // Java). 163 // If we have a breakpoint, then we don't rewrite 164 // because the _breakpoint bytecode would be lost. 165 oop obj = klass->allocate_instance(CHECK); 166 thread->set_vm_result(obj); 167 IRT_END 168 169 170 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 171 oop obj = oopFactory::new_typeArray(type, size, CHECK); 172 thread->set_vm_result(obj); 173 IRT_END 174 175 176 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 177 Klass* klass = pool->klass_at(index, CHECK); 178 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 179 thread->set_vm_result(obj); 180 IRT_END 181 182 183 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 184 // We may want to pass in more arguments - could make this slightly faster 185 ConstantPool* constants = method(thread)->constants(); 186 int i = get_index_u2(thread, Bytecodes::_multianewarray); 187 Klass* klass = constants->klass_at(i, CHECK); 188 int nof_dims = number_of_dimensions(thread); 189 assert(klass->is_klass(), "not a class"); 190 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 191 192 // We must create an array of jints to pass to multi_allocate. 193 ResourceMark rm(thread); 194 const int small_dims = 10; 195 jint dim_array[small_dims]; 196 jint *dims = &dim_array[0]; 197 if (nof_dims > small_dims) { 198 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 199 } 200 for (int index = 0; index < nof_dims; index++) { 201 // offset from first_size_address is addressed as local[index] 202 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 203 dims[index] = first_size_address[n]; 204 } 205 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 206 thread->set_vm_result(obj); 207 IRT_END 208 209 210 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 211 assert(obj->is_oop(), "must be a valid oop"); 212 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 213 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 214 IRT_END 215 216 217 // Quicken instance-of and check-cast bytecodes 218 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 219 // Force resolving; quicken the bytecode 220 int which = get_index_u2(thread, Bytecodes::_checkcast); 221 ConstantPool* cpool = method(thread)->constants(); 222 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 223 // program we might have seen an unquick'd bytecode in the interpreter but have another 224 // thread quicken the bytecode before we get here. 225 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 226 Klass* klass = cpool->klass_at(which, CHECK); 227 thread->set_vm_result_2(klass); 228 IRT_END 229 230 231 //------------------------------------------------------------------------------------------------------------------------ 232 // Exceptions 233 234 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 235 methodHandle trap_method, int trap_bci, TRAPS) { 236 if (trap_method.not_null()) { 237 MethodData* trap_mdo = trap_method->method_data(); 238 if (trap_mdo == NULL) { 239 Method::build_interpreter_method_data(trap_method, THREAD); 240 if (HAS_PENDING_EXCEPTION) { 241 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 242 "we expect only an OOM error here"); 243 CLEAR_PENDING_EXCEPTION; 244 } 245 trap_mdo = trap_method->method_data(); 246 // and fall through... 247 } 248 if (trap_mdo != NULL) { 249 // Update per-method count of trap events. The interpreter 250 // is updating the MDO to simulate the effect of compiler traps. 251 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 252 } 253 } 254 } 255 256 // Assume the compiler is (or will be) interested in this event. 257 // If necessary, create an MDO to hold the information, and record it. 258 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 259 assert(ProfileTraps, "call me only if profiling"); 260 methodHandle trap_method(thread, method(thread)); 261 int trap_bci = trap_method->bci_from(bcp(thread)); 262 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 263 } 264 265 #ifdef CC_INTERP 266 // As legacy note_trap, but we have more arguments. 267 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 268 methodHandle trap_method(method); 269 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 270 IRT_END 271 272 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 273 // for each exception. 274 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 275 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 276 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 277 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 278 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 279 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 280 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 282 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 283 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 284 #endif // CC_INTERP 285 286 287 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 288 // get klass 289 InstanceKlass* klass = InstanceKlass::cast(k); 290 assert(klass->is_initialized(), 291 "this klass should have been initialized during VM initialization"); 292 // create instance - do not call constructor since we may have no 293 // (java) stack space left (should assert constructor is empty) 294 Handle exception; 295 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 296 exception = Handle(THREAD, exception_oop); 297 if (StackTraceInThrowable) { 298 java_lang_Throwable::fill_in_stack_trace(exception); 299 } 300 return exception; 301 } 302 303 // Special handling for stack overflow: since we don't have any (java) stack 304 // space left we use the pre-allocated & pre-initialized StackOverflowError 305 // klass to create an stack overflow error instance. We do not call its 306 // constructor for the same reason (it is empty, anyway). 307 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 308 Handle exception = get_preinitialized_exception( 309 SystemDictionary::StackOverflowError_klass(), 310 CHECK); 311 // Increment counter for hs_err file reporting 312 Atomic::inc(&Exceptions::_stack_overflow_errors); 313 THROW_HANDLE(exception); 314 IRT_END 315 316 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread)) 317 Handle exception = get_preinitialized_exception( 318 SystemDictionary::StackOverflowError_klass(), 319 CHECK); 320 java_lang_Throwable::set_message(exception(), 321 Universe::delayed_stack_overflow_error_message()); 322 // Increment counter for hs_err file reporting 323 Atomic::inc(&Exceptions::_stack_overflow_errors); 324 THROW_HANDLE(exception); 325 IRT_END 326 327 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 328 // lookup exception klass 329 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 330 if (ProfileTraps) { 331 if (s == vmSymbols::java_lang_ArithmeticException()) { 332 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 333 } else if (s == vmSymbols::java_lang_NullPointerException()) { 334 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 335 } 336 } 337 // create exception 338 Handle exception = Exceptions::new_exception(thread, s, message); 339 thread->set_vm_result(exception()); 340 IRT_END 341 342 343 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 344 ResourceMark rm(thread); 345 const char* klass_name = obj->klass()->external_name(); 346 // lookup exception klass 347 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 348 if (ProfileTraps) { 349 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 350 } 351 // create exception, with klass name as detail message 352 Handle exception = Exceptions::new_exception(thread, s, klass_name); 353 thread->set_vm_result(exception()); 354 IRT_END 355 356 357 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 358 char message[jintAsStringSize]; 359 // lookup exception klass 360 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 361 if (ProfileTraps) { 362 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 363 } 364 // create exception 365 sprintf(message, "%d", index); 366 THROW_MSG(s, message); 367 IRT_END 368 369 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 370 JavaThread* thread, oopDesc* obj)) 371 372 ResourceMark rm(thread); 373 char* message = SharedRuntime::generate_class_cast_message( 374 thread, obj->klass()); 375 376 if (ProfileTraps) { 377 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 378 } 379 380 // create exception 381 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 382 IRT_END 383 384 // exception_handler_for_exception(...) returns the continuation address, 385 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 386 // The exception oop is returned to make sure it is preserved over GC (it 387 // is only on the stack if the exception was thrown explicitly via athrow). 388 // During this operation, the expression stack contains the values for the 389 // bci where the exception happened. If the exception was propagated back 390 // from a call, the expression stack contains the values for the bci at the 391 // invoke w/o arguments (i.e., as if one were inside the call). 392 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 393 394 Handle h_exception(thread, exception); 395 methodHandle h_method (thread, method(thread)); 396 constantPoolHandle h_constants(thread, h_method->constants()); 397 bool should_repeat; 398 int handler_bci; 399 int current_bci = bci(thread); 400 401 if (thread->frames_to_pop_failed_realloc() > 0) { 402 // Allocation of scalar replaced object used in this frame 403 // failed. Unconditionally pop the frame. 404 thread->dec_frames_to_pop_failed_realloc(); 405 thread->set_vm_result(h_exception()); 406 // If the method is synchronized we already unlocked the monitor 407 // during deoptimization so the interpreter needs to skip it when 408 // the frame is popped. 409 thread->set_do_not_unlock_if_synchronized(true); 410 #ifdef CC_INTERP 411 return (address) -1; 412 #else 413 return Interpreter::remove_activation_entry(); 414 #endif 415 } 416 417 // Need to do this check first since when _do_not_unlock_if_synchronized 418 // is set, we don't want to trigger any classloading which may make calls 419 // into java, or surprisingly find a matching exception handler for bci 0 420 // since at this moment the method hasn't been "officially" entered yet. 421 if (thread->do_not_unlock_if_synchronized()) { 422 ResourceMark rm; 423 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 424 thread->set_vm_result(exception); 425 #ifdef CC_INTERP 426 return (address) -1; 427 #else 428 return Interpreter::remove_activation_entry(); 429 #endif 430 } 431 432 do { 433 should_repeat = false; 434 435 // assertions 436 #ifdef ASSERT 437 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 438 assert(h_exception->is_oop(), "just checking"); 439 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 440 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 441 if (ExitVMOnVerifyError) vm_exit(-1); 442 ShouldNotReachHere(); 443 } 444 #endif 445 446 // tracing 447 if (log_is_enabled(Info, exceptions)) { 448 ResourceMark rm(thread); 449 stringStream tempst; 450 tempst.print("interpreter method <%s>\n" 451 " at bci %d for thread " INTPTR_FORMAT, 452 h_method->print_value_string(), current_bci, p2i(thread)); 453 Exceptions::log_exception(h_exception, tempst); 454 } 455 // Don't go paging in something which won't be used. 456 // else if (extable->length() == 0) { 457 // // disabled for now - interpreter is not using shortcut yet 458 // // (shortcut is not to call runtime if we have no exception handlers) 459 // // warning("performance bug: should not call runtime if method has no exception handlers"); 460 // } 461 // for AbortVMOnException flag 462 Exceptions::debug_check_abort(h_exception); 463 464 // exception handler lookup 465 KlassHandle h_klass(THREAD, h_exception->klass()); 466 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 467 if (HAS_PENDING_EXCEPTION) { 468 // We threw an exception while trying to find the exception handler. 469 // Transfer the new exception to the exception handle which will 470 // be set into thread local storage, and do another lookup for an 471 // exception handler for this exception, this time starting at the 472 // BCI of the exception handler which caused the exception to be 473 // thrown (bug 4307310). 474 h_exception = Handle(THREAD, PENDING_EXCEPTION); 475 CLEAR_PENDING_EXCEPTION; 476 if (handler_bci >= 0) { 477 current_bci = handler_bci; 478 should_repeat = true; 479 } 480 } 481 } while (should_repeat == true); 482 483 #if INCLUDE_JVMCI 484 if (EnableJVMCI && h_method->method_data() != NULL) { 485 ResourceMark rm(thread); 486 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 487 if (pdata != NULL && pdata->is_BitData()) { 488 BitData* bit_data = (BitData*) pdata; 489 bit_data->set_exception_seen(); 490 } 491 } 492 #endif 493 494 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 495 // time throw or a stack unwinding throw and accordingly notify the debugger 496 if (JvmtiExport::can_post_on_exceptions()) { 497 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 498 } 499 500 #ifdef CC_INTERP 501 address continuation = (address)(intptr_t) handler_bci; 502 #else 503 address continuation = NULL; 504 #endif 505 address handler_pc = NULL; 506 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 507 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 508 // handler in this method, or (b) after a stack overflow there is not yet 509 // enough stack space available to reprotect the stack. 510 #ifndef CC_INTERP 511 continuation = Interpreter::remove_activation_entry(); 512 #endif 513 #if COMPILER2_OR_JVMCI 514 // Count this for compilation purposes 515 h_method->interpreter_throwout_increment(THREAD); 516 #endif 517 } else { 518 // handler in this method => change bci/bcp to handler bci/bcp and continue there 519 handler_pc = h_method->code_base() + handler_bci; 520 #ifndef CC_INTERP 521 set_bcp_and_mdp(handler_pc, thread); 522 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 523 #endif 524 } 525 // notify debugger of an exception catch 526 // (this is good for exceptions caught in native methods as well) 527 if (JvmtiExport::can_post_on_exceptions()) { 528 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 529 } 530 531 thread->set_vm_result(h_exception()); 532 return continuation; 533 IRT_END 534 535 536 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 537 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 538 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 539 IRT_END 540 541 542 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 543 THROW(vmSymbols::java_lang_AbstractMethodError()); 544 IRT_END 545 546 547 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 548 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 549 IRT_END 550 551 552 //------------------------------------------------------------------------------------------------------------------------ 553 // Fields 554 // 555 556 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 557 Thread* THREAD = thread; 558 // resolve field 559 fieldDescriptor info; 560 constantPoolHandle pool(thread, method(thread)->constants()); 561 methodHandle m(thread, method(thread)); 562 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 563 bytecode == Bytecodes::_putstatic); 564 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 565 566 { 567 JvmtiHideSingleStepping jhss(thread); 568 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 569 m, bytecode, CHECK); 570 } // end JvmtiHideSingleStepping 571 572 // check if link resolution caused cpCache to be updated 573 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 574 if (cp_cache_entry->is_resolved(bytecode)) return; 575 576 // compute auxiliary field attributes 577 TosState state = as_TosState(info.field_type()); 578 579 // Resolution of put instructions on final fields is delayed. That is required so that 580 // exceptions are thrown at the correct place (when the instruction is actually invoked). 581 // If we do not resolve an instruction in the current pass, leaving the put_code 582 // set to zero will cause the next put instruction to the same field to reresolve. 583 584 // Resolution of put instructions to final instance fields with invalid updates (i.e., 585 // to final instance fields with updates originating from a method different than <init>) 586 // is inhibited. A putfield instruction targeting an instance final field must throw 587 // an IllegalAccessError if the instruction is not in an instance 588 // initializer method <init>. If resolution were not inhibited, a putfield 589 // in an initializer method could be resolved in the initializer. Subsequent 590 // putfield instructions to the same field would then use cached information. 591 // As a result, those instructions would not pass through the VM. That is, 592 // checks in resolve_field_access() would not be executed for those instructions 593 // and the required IllegalAccessError would not not be thrown. 594 // 595 // Also, we need to delay resolving getstatic and putstatic instructions until the 596 // class is initialized. This is required so that access to the static 597 // field will call the initialization function every time until the class 598 // is completely initialized ala. in 2.17.5 in JVM Specification. 599 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 600 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 601 !klass->is_initialized()); 602 603 Bytecodes::Code put_code = (Bytecodes::Code)0; 604 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 605 info.has_initialized_final_update(); 606 607 if (has_initialized_final_update) { 608 assert(info.access_flags().is_final(), "Fields with initialized final updates must be final"); 609 } 610 611 if (!uninitialized_static) { 612 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 613 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 614 } 615 } 616 617 Bytecodes::Code get_code = (Bytecodes::Code)0; 618 if (!uninitialized_static) { 619 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 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 #ifdef ASSERT 776 if (bytecode == Bytecodes::_invokeinterface) { 777 if (info.resolved_method()->method_holder() == 778 SystemDictionary::Object_klass()) { 779 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 780 // (see also CallInfo::set_interface for details) 781 assert(info.call_kind() == CallInfo::vtable_call || 782 info.call_kind() == CallInfo::direct_call, ""); 783 methodHandle rm = info.resolved_method(); 784 assert(rm->is_final() || info.has_vtable_index(), 785 "should have been set already"); 786 } else if (!info.resolved_method()->has_itable_index()) { 787 // Resolved something like CharSequence.toString. Use vtable not itable. 788 assert(info.call_kind() != CallInfo::itable_call, ""); 789 } else { 790 // Setup itable entry 791 assert(info.call_kind() == CallInfo::itable_call, ""); 792 int index = info.resolved_method()->itable_index(); 793 assert(info.itable_index() == index, ""); 794 } 795 } else { 796 assert(info.call_kind() == CallInfo::direct_call || 797 info.call_kind() == CallInfo::vtable_call, ""); 798 } 799 #endif 800 switch (info.call_kind()) { 801 case CallInfo::direct_call: 802 cp_cache_entry->set_direct_call( 803 bytecode, 804 info.resolved_method()); 805 break; 806 case CallInfo::vtable_call: 807 cp_cache_entry->set_vtable_call( 808 bytecode, 809 info.resolved_method(), 810 info.vtable_index()); 811 break; 812 case CallInfo::itable_call: 813 cp_cache_entry->set_itable_call( 814 bytecode, 815 info.resolved_method(), 816 info.itable_index()); 817 break; 818 default: ShouldNotReachHere(); 819 } 820 } 821 822 823 // First time execution: Resolve symbols, create a permanent MethodType object. 824 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 825 Thread* THREAD = thread; 826 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 827 828 // resolve method 829 CallInfo info; 830 constantPoolHandle pool(thread, method(thread)->constants()); 831 { 832 JvmtiHideSingleStepping jhss(thread); 833 LinkResolver::resolve_invoke(info, Handle(), pool, 834 get_index_u2_cpcache(thread, bytecode), bytecode, 835 CHECK); 836 } // end JvmtiHideSingleStepping 837 838 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 839 cp_cache_entry->set_method_handle(pool, info); 840 } 841 842 // First time execution: Resolve symbols, create a permanent CallSite object. 843 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 844 Thread* THREAD = thread; 845 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 846 847 //TO DO: consider passing BCI to Java. 848 // int caller_bci = method(thread)->bci_from(bcp(thread)); 849 850 // resolve method 851 CallInfo info; 852 constantPoolHandle pool(thread, method(thread)->constants()); 853 int index = get_index_u4(thread, bytecode); 854 { 855 JvmtiHideSingleStepping jhss(thread); 856 LinkResolver::resolve_invoke(info, Handle(), pool, 857 index, bytecode, CHECK); 858 } // end JvmtiHideSingleStepping 859 860 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 861 cp_cache_entry->set_dynamic_call(pool, info); 862 } 863 864 // This function is the interface to the assembly code. It returns the resolved 865 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 866 // This function will check for redefinition! 867 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 868 switch (bytecode) { 869 case Bytecodes::_getstatic: 870 case Bytecodes::_putstatic: 871 case Bytecodes::_getfield: 872 case Bytecodes::_putfield: 873 resolve_get_put(thread, bytecode); 874 break; 875 case Bytecodes::_invokevirtual: 876 case Bytecodes::_invokespecial: 877 case Bytecodes::_invokestatic: 878 case Bytecodes::_invokeinterface: 879 resolve_invoke(thread, bytecode); 880 break; 881 case Bytecodes::_invokehandle: 882 resolve_invokehandle(thread); 883 break; 884 case Bytecodes::_invokedynamic: 885 resolve_invokedynamic(thread); 886 break; 887 default: 888 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 889 break; 890 } 891 } 892 IRT_END 893 894 //------------------------------------------------------------------------------------------------------------------------ 895 // Miscellaneous 896 897 898 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 899 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 900 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 901 if (branch_bcp != NULL && nm != NULL) { 902 // This was a successful request for an OSR nmethod. Because 903 // frequency_counter_overflow_inner ends with a safepoint check, 904 // nm could have been unloaded so look it up again. It's unsafe 905 // to examine nm directly since it might have been freed and used 906 // for something else. 907 frame fr = thread->last_frame(); 908 Method* method = fr.interpreter_frame_method(); 909 int bci = method->bci_from(fr.interpreter_frame_bcp()); 910 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 911 } 912 #ifndef PRODUCT 913 if (TraceOnStackReplacement) { 914 if (nm != NULL) { 915 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 916 nm->print(); 917 } 918 } 919 #endif 920 return nm; 921 } 922 923 IRT_ENTRY(nmethod*, 924 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 925 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 926 // flag, in case this method triggers classloading which will call into Java. 927 UnlockFlagSaver fs(thread); 928 929 frame fr = thread->last_frame(); 930 assert(fr.is_interpreted_frame(), "must come from interpreter"); 931 methodHandle method(thread, fr.interpreter_frame_method()); 932 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 933 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 934 935 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 936 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 937 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 938 939 if (osr_nm != NULL) { 940 // We may need to do on-stack replacement which requires that no 941 // monitors in the activation are biased because their 942 // BasicObjectLocks will need to migrate during OSR. Force 943 // unbiasing of all monitors in the activation now (even though 944 // the OSR nmethod might be invalidated) because we don't have a 945 // safepoint opportunity later once the migration begins. 946 if (UseBiasedLocking) { 947 ResourceMark rm; 948 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 949 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 950 kptr < fr.interpreter_frame_monitor_begin(); 951 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 952 if( kptr->obj() != NULL ) { 953 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 954 } 955 } 956 BiasedLocking::revoke(objects_to_revoke); 957 } 958 } 959 return osr_nm; 960 IRT_END 961 962 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 963 assert(ProfileInterpreter, "must be profiling interpreter"); 964 int bci = method->bci_from(cur_bcp); 965 MethodData* mdo = method->method_data(); 966 if (mdo == NULL) return 0; 967 return mdo->bci_to_di(bci); 968 IRT_END 969 970 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 971 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 972 // flag, in case this method triggers classloading which will call into Java. 973 UnlockFlagSaver fs(thread); 974 975 assert(ProfileInterpreter, "must be profiling interpreter"); 976 frame fr = thread->last_frame(); 977 assert(fr.is_interpreted_frame(), "must come from interpreter"); 978 methodHandle method(thread, fr.interpreter_frame_method()); 979 Method::build_interpreter_method_data(method, THREAD); 980 if (HAS_PENDING_EXCEPTION) { 981 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 982 CLEAR_PENDING_EXCEPTION; 983 // and fall through... 984 } 985 IRT_END 986 987 988 #ifdef ASSERT 989 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 990 assert(ProfileInterpreter, "must be profiling interpreter"); 991 992 MethodData* mdo = method->method_data(); 993 assert(mdo != NULL, "must not be null"); 994 995 int bci = method->bci_from(bcp); 996 997 address mdp2 = mdo->bci_to_dp(bci); 998 if (mdp != mdp2) { 999 ResourceMark rm; 1000 ResetNoHandleMark rnm; // In a LEAF entry. 1001 HandleMark hm; 1002 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1003 int current_di = mdo->dp_to_di(mdp); 1004 int expected_di = mdo->dp_to_di(mdp2); 1005 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1006 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1007 int approx_bci = -1; 1008 if (current_di >= 0) { 1009 approx_bci = mdo->data_at(current_di)->bci(); 1010 } 1011 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1012 mdo->print_on(tty); 1013 method->print_codes(); 1014 } 1015 assert(mdp == mdp2, "wrong mdp"); 1016 IRT_END 1017 #endif // ASSERT 1018 1019 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1020 assert(ProfileInterpreter, "must be profiling interpreter"); 1021 ResourceMark rm(thread); 1022 HandleMark hm(thread); 1023 frame fr = thread->last_frame(); 1024 assert(fr.is_interpreted_frame(), "must come from interpreter"); 1025 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 1026 1027 // Grab a lock to ensure atomic access to setting the return bci and 1028 // the displacement. This can block and GC, invalidating all naked oops. 1029 MutexLocker ml(RetData_lock); 1030 1031 // ProfileData is essentially a wrapper around a derived oop, so we 1032 // need to take the lock before making any ProfileData structures. 1033 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 1034 RetData* rdata = data->as_RetData(); 1035 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1036 fr.interpreter_frame_set_mdp(new_mdp); 1037 IRT_END 1038 1039 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1040 MethodCounters* mcs = Method::build_method_counters(m, thread); 1041 if (HAS_PENDING_EXCEPTION) { 1042 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1043 CLEAR_PENDING_EXCEPTION; 1044 } 1045 return mcs; 1046 IRT_END 1047 1048 1049 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1050 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1051 // stack traversal automatically takes care of preserving arguments for invoke, so 1052 // this is no longer needed. 1053 1054 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1055 // if this is called during a safepoint 1056 1057 if (JvmtiExport::should_post_single_step()) { 1058 // We are called during regular safepoints and when the VM is 1059 // single stepping. If any thread is marked for single stepping, 1060 // then we may have JVMTI work to do. 1061 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1062 } 1063 IRT_END 1064 1065 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1066 ConstantPoolCacheEntry *cp_entry)) 1067 1068 // check the access_flags for the field in the klass 1069 1070 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1071 int index = cp_entry->field_index(); 1072 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1073 1074 bool is_static = (obj == NULL); 1075 HandleMark hm(thread); 1076 1077 Handle h_obj; 1078 if (!is_static) { 1079 // non-static field accessors have an object, but we need a handle 1080 h_obj = Handle(thread, obj); 1081 } 1082 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1083 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1084 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1085 IRT_END 1086 1087 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1088 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1089 1090 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1091 1092 // check the access_flags for the field in the klass 1093 InstanceKlass* ik = InstanceKlass::cast(k); 1094 int index = cp_entry->field_index(); 1095 // bail out if field modifications are not watched 1096 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1097 1098 char sig_type = '\0'; 1099 1100 switch(cp_entry->flag_state()) { 1101 case btos: sig_type = 'B'; break; 1102 case ztos: sig_type = 'Z'; break; 1103 case ctos: sig_type = 'C'; break; 1104 case stos: sig_type = 'S'; break; 1105 case itos: sig_type = 'I'; break; 1106 case ftos: sig_type = 'F'; break; 1107 case atos: sig_type = 'L'; break; 1108 case ltos: sig_type = 'J'; break; 1109 case dtos: sig_type = 'D'; break; 1110 default: ShouldNotReachHere(); return; 1111 } 1112 bool is_static = (obj == NULL); 1113 1114 HandleMark hm(thread); 1115 instanceKlassHandle h_klass(thread, k); 1116 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1117 jvalue fvalue; 1118 #ifdef _LP64 1119 fvalue = *value; 1120 #else 1121 // Long/double values are stored unaligned and also noncontiguously with 1122 // tagged stacks. We can't just do a simple assignment even in the non- 1123 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1124 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1125 // We assume that the two halves of longs/doubles are stored in interpreter 1126 // stack slots in platform-endian order. 1127 jlong_accessor u; 1128 jint* newval = (jint*)value; 1129 u.words[0] = newval[0]; 1130 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1131 fvalue.j = u.long_value; 1132 #endif // _LP64 1133 1134 Handle h_obj; 1135 if (!is_static) { 1136 // non-static field accessors have an object, but we need a handle 1137 h_obj = Handle(thread, obj); 1138 } 1139 1140 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1141 fid, sig_type, &fvalue); 1142 IRT_END 1143 1144 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1145 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1146 IRT_END 1147 1148 1149 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1150 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1151 IRT_END 1152 1153 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1154 { 1155 return (Interpreter::contains(pc) ? 1 : 0); 1156 } 1157 IRT_END 1158 1159 1160 // Implementation of SignatureHandlerLibrary 1161 1162 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1163 // Dummy definition (else normalization method is defined in CPU 1164 // dependant code) 1165 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1166 return fingerprint; 1167 } 1168 #endif 1169 1170 address SignatureHandlerLibrary::set_handler_blob() { 1171 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1172 if (handler_blob == NULL) { 1173 return NULL; 1174 } 1175 address handler = handler_blob->code_begin(); 1176 _handler_blob = handler_blob; 1177 _handler = handler; 1178 return handler; 1179 } 1180 1181 void SignatureHandlerLibrary::initialize() { 1182 if (_fingerprints != NULL) { 1183 return; 1184 } 1185 if (set_handler_blob() == NULL) { 1186 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1187 } 1188 1189 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1190 SignatureHandlerLibrary::buffer_size); 1191 _buffer = bb->code_begin(); 1192 1193 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1194 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1195 } 1196 1197 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1198 address handler = _handler; 1199 int insts_size = buffer->pure_insts_size(); 1200 if (handler + insts_size > _handler_blob->code_end()) { 1201 // get a new handler blob 1202 handler = set_handler_blob(); 1203 } 1204 if (handler != NULL) { 1205 memcpy(handler, buffer->insts_begin(), insts_size); 1206 pd_set_handler(handler); 1207 ICache::invalidate_range(handler, insts_size); 1208 _handler = handler + insts_size; 1209 } 1210 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler); 1211 return handler; 1212 } 1213 1214 void SignatureHandlerLibrary::add(const methodHandle& method) { 1215 if (method->signature_handler() == NULL) { 1216 // use slow signature handler if we can't do better 1217 int handler_index = -1; 1218 // check if we can use customized (fast) signature handler 1219 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1220 // use customized signature handler 1221 MutexLocker mu(SignatureHandlerLibrary_lock); 1222 // make sure data structure is initialized 1223 initialize(); 1224 // lookup method signature's fingerprint 1225 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1226 // allow CPU dependant code to optimize the fingerprints for the fast handler 1227 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1228 handler_index = _fingerprints->find(fingerprint); 1229 // create handler if necessary 1230 if (handler_index < 0) { 1231 ResourceMark rm; 1232 ptrdiff_t align_offset = (address) 1233 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1234 CodeBuffer buffer((address)(_buffer + align_offset), 1235 SignatureHandlerLibrary::buffer_size - align_offset); 1236 if (!CodeCacheExtensions::support_dynamic_code()) { 1237 // we need a name for the signature (for lookups or saving) 1238 const int SYMBOL_SIZE = 50; 1239 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE); 1240 // support for named signatures 1241 jio_snprintf(symbolName, SYMBOL_SIZE, 1242 "native_" UINT64_FORMAT, fingerprint); 1243 buffer.set_name(symbolName); 1244 } 1245 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1246 // copy into code heap 1247 address handler = set_handler(&buffer); 1248 if (handler == NULL) { 1249 // use slow signature handler (without memorizing it in the fingerprints) 1250 } else { 1251 // debugging suppport 1252 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1253 ttyLocker ttyl; 1254 tty->cr(); 1255 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1256 _handlers->length(), 1257 (method->is_static() ? "static" : "receiver"), 1258 method->name_and_sig_as_C_string(), 1259 fingerprint, 1260 buffer.insts_size()); 1261 if (buffer.insts_size() > 0) { 1262 // buffer may be empty for pregenerated handlers 1263 Disassembler::decode(handler, handler + buffer.insts_size()); 1264 } 1265 #ifndef PRODUCT 1266 address rh_begin = Interpreter::result_handler(method()->result_type()); 1267 if (CodeCache::contains(rh_begin)) { 1268 // else it might be special platform dependent values 1269 tty->print_cr(" --- associated result handler ---"); 1270 address rh_end = rh_begin; 1271 while (*(int*)rh_end != 0) { 1272 rh_end += sizeof(int); 1273 } 1274 Disassembler::decode(rh_begin, rh_end); 1275 } else { 1276 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1277 } 1278 #endif 1279 } 1280 // add handler to library 1281 _fingerprints->append(fingerprint); 1282 _handlers->append(handler); 1283 // set handler index 1284 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1285 handler_index = _fingerprints->length() - 1; 1286 } 1287 } 1288 // Set handler under SignatureHandlerLibrary_lock 1289 if (handler_index < 0) { 1290 // use generic signature handler 1291 method->set_signature_handler(Interpreter::slow_signature_handler()); 1292 } else { 1293 // set handler 1294 method->set_signature_handler(_handlers->at(handler_index)); 1295 } 1296 } else { 1297 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1298 // use generic signature handler 1299 method->set_signature_handler(Interpreter::slow_signature_handler()); 1300 } 1301 } 1302 #ifdef ASSERT 1303 int handler_index = -1; 1304 int fingerprint_index = -2; 1305 { 1306 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1307 // in any way if accessed from multiple threads. To avoid races with another 1308 // thread which may change the arrays in the above, mutex protected block, we 1309 // have to protect this read access here with the same mutex as well! 1310 MutexLocker mu(SignatureHandlerLibrary_lock); 1311 if (_handlers != NULL) { 1312 handler_index = _handlers->find(method->signature_handler()); 1313 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1314 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1315 fingerprint_index = _fingerprints->find(fingerprint); 1316 } 1317 } 1318 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1319 handler_index == fingerprint_index, "sanity check"); 1320 #endif // ASSERT 1321 } 1322 1323 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1324 int handler_index = -1; 1325 // use customized signature handler 1326 MutexLocker mu(SignatureHandlerLibrary_lock); 1327 // make sure data structure is initialized 1328 initialize(); 1329 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1330 handler_index = _fingerprints->find(fingerprint); 1331 // create handler if necessary 1332 if (handler_index < 0) { 1333 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1334 tty->cr(); 1335 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1336 _handlers->length(), 1337 p2i(handler), 1338 fingerprint); 1339 } 1340 _fingerprints->append(fingerprint); 1341 _handlers->append(handler); 1342 } else { 1343 if (PrintSignatureHandlers) { 1344 tty->cr(); 1345 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1346 _handlers->length(), 1347 fingerprint, 1348 p2i(_handlers->at(handler_index)), 1349 p2i(handler)); 1350 } 1351 } 1352 } 1353 1354 1355 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1356 address SignatureHandlerLibrary::_handler = NULL; 1357 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1358 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1359 address SignatureHandlerLibrary::_buffer = NULL; 1360 1361 1362 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1363 methodHandle m(thread, method); 1364 assert(m->is_native(), "sanity check"); 1365 // lookup native function entry point if it doesn't exist 1366 bool in_base_library; 1367 if (!m->has_native_function()) { 1368 NativeLookup::lookup(m, in_base_library, CHECK); 1369 } 1370 // make sure signature handler is installed 1371 SignatureHandlerLibrary::add(m); 1372 // The interpreter entry point checks the signature handler first, 1373 // before trying to fetch the native entry point and klass mirror. 1374 // We must set the signature handler last, so that multiple processors 1375 // preparing the same method will be sure to see non-null entry & mirror. 1376 IRT_END 1377 1378 #if defined(IA32) || defined(AMD64) || defined(ARM) 1379 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1380 if (src_address == dest_address) { 1381 return; 1382 } 1383 ResetNoHandleMark rnm; // In a LEAF entry. 1384 HandleMark hm; 1385 ResourceMark rm; 1386 frame fr = thread->last_frame(); 1387 assert(fr.is_interpreted_frame(), ""); 1388 jint bci = fr.interpreter_frame_bci(); 1389 methodHandle mh(thread, fr.interpreter_frame_method()); 1390 Bytecode_invoke invoke(mh, bci); 1391 ArgumentSizeComputer asc(invoke.signature()); 1392 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1393 Copy::conjoint_jbytes(src_address, dest_address, 1394 size_of_arguments * Interpreter::stackElementSize); 1395 IRT_END 1396 #endif 1397 1398 #if INCLUDE_JVMTI 1399 // This is a support of the JVMTI PopFrame interface. 1400 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1401 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1402 // The member_name argument is a saved reference (in local#0) to the member_name. 1403 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1404 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1405 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1406 Method* method, address bcp)) 1407 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1408 if (code != Bytecodes::_invokestatic) { 1409 return; 1410 } 1411 ConstantPool* cpool = method->constants(); 1412 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1413 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1414 Symbol* mname = cpool->name_ref_at(cp_index); 1415 1416 if (MethodHandles::has_member_arg(cname, mname)) { 1417 oop member_name_oop = (oop) member_name; 1418 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1419 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1420 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1421 } 1422 thread->set_vm_result(member_name_oop); 1423 } else { 1424 thread->set_vm_result(NULL); 1425 } 1426 IRT_END 1427 #endif // INCLUDE_JVMTI 1428 1429 #ifndef PRODUCT 1430 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to 1431 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1432 // The generated code still uses call_VM because that will set up the frame pointer for 1433 // bcp and method. 1434 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1435 const frame f = thread->last_frame(); 1436 assert(f.is_interpreted_frame(), "must be an interpreted frame"); 1437 methodHandle mh(thread, f.interpreter_frame_method()); 1438 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); 1439 return preserve_this_value; 1440 IRT_END 1441 #endif // !PRODUCT