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 // We need to delay resolving put instructions on final fields 580 // until we actually invoke one. This is required so we throw 581 // exceptions at the correct place. If we do not resolve completely 582 // in the current pass, leaving the put_code set to zero will 583 // cause the next put instruction to reresolve. 584 Bytecodes::Code put_code = (Bytecodes::Code)0; 585 586 // We also need to delay resolving getstatic instructions until the 587 // class is intitialized. This is required so that access to the static 588 // field will call the initialization function every time until the class 589 // is completely initialized ala. in 2.17.5 in JVM Specification. 590 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 591 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 592 !klass->is_initialized()); 593 Bytecodes::Code get_code = (Bytecodes::Code)0; 594 595 /* Do not cache the result of the resolution for putfield instructions 596 * to instance final fields. 597 * 598 * A putfield instruction targeting an instance final field must throw 599 * an IllegalAccessError if the instruction is not in an instance 600 * initializer method <init>. Without the check below, a putfield 601 * in an initializer method is resolved; subsequent putfield instructions 602 * to the same field then use cached information and thus do not pass 603 * through the VM (i.e., checks will not be executed for those instructions). 604 */ 605 bool final_instance_update = info.field_holder()->major_version() >= 53 && 606 info.has_initialized_final_update() && 607 (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield); 608 609 610 if (!uninitialized_static) { 611 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 612 if ((is_put && !final_instance_update) || !info.access_flags().is_final()) { 613 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 614 } 615 } 616 617 cp_cache_entry->set_field( 618 get_code, 619 put_code, 620 info.field_holder(), 621 info.index(), 622 info.offset(), 623 state, 624 info.access_flags().is_final(), 625 info.access_flags().is_volatile(), 626 pool->pool_holder() 627 ); 628 } 629 630 631 //------------------------------------------------------------------------------------------------------------------------ 632 // Synchronization 633 // 634 // The interpreter's synchronization code is factored out so that it can 635 // be shared by method invocation and synchronized blocks. 636 //%note synchronization_3 637 638 //%note monitor_1 639 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 640 #ifdef ASSERT 641 thread->last_frame().interpreter_frame_verify_monitor(elem); 642 #endif 643 if (PrintBiasedLockingStatistics) { 644 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 645 } 646 Handle h_obj(thread, elem->obj()); 647 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 648 "must be NULL or an object"); 649 if (UseBiasedLocking) { 650 // Retry fast entry if bias is revoked to avoid unnecessary inflation 651 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 652 } else { 653 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 654 } 655 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 656 "must be NULL or an object"); 657 #ifdef ASSERT 658 thread->last_frame().interpreter_frame_verify_monitor(elem); 659 #endif 660 IRT_END 661 662 663 //%note monitor_1 664 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 665 #ifdef ASSERT 666 thread->last_frame().interpreter_frame_verify_monitor(elem); 667 #endif 668 Handle h_obj(thread, elem->obj()); 669 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 670 "must be NULL or an object"); 671 if (elem == NULL || h_obj()->is_unlocked()) { 672 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 673 } 674 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 675 // Free entry. This must be done here, since a pending exception might be installed on 676 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 677 elem->set_obj(NULL); 678 #ifdef ASSERT 679 thread->last_frame().interpreter_frame_verify_monitor(elem); 680 #endif 681 IRT_END 682 683 684 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 685 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 686 IRT_END 687 688 689 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 690 // Returns an illegal exception to install into the current thread. The 691 // pending_exception flag is cleared so normal exception handling does not 692 // trigger. Any current installed exception will be overwritten. This 693 // method will be called during an exception unwind. 694 695 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 696 Handle exception(thread, thread->vm_result()); 697 assert(exception() != NULL, "vm result should be set"); 698 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 699 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 700 exception = get_preinitialized_exception( 701 SystemDictionary::IllegalMonitorStateException_klass(), 702 CATCH); 703 } 704 thread->set_vm_result(exception()); 705 IRT_END 706 707 708 //------------------------------------------------------------------------------------------------------------------------ 709 // Invokes 710 711 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 712 return method->orig_bytecode_at(method->bci_from(bcp)); 713 IRT_END 714 715 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 716 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 717 IRT_END 718 719 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 720 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 721 IRT_END 722 723 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 724 Thread* THREAD = thread; 725 // extract receiver from the outgoing argument list if necessary 726 Handle receiver(thread, NULL); 727 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 728 ResourceMark rm(thread); 729 methodHandle m (thread, method(thread)); 730 Bytecode_invoke call(m, bci(thread)); 731 Symbol* signature = call.signature(); 732 receiver = Handle(thread, 733 thread->last_frame().interpreter_callee_receiver(signature)); 734 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 735 "sanity check"); 736 assert(receiver.is_null() || 737 !Universe::heap()->is_in_reserved(receiver->klass()), 738 "sanity check"); 739 } 740 741 // resolve method 742 CallInfo info; 743 constantPoolHandle pool(thread, method(thread)->constants()); 744 745 { 746 JvmtiHideSingleStepping jhss(thread); 747 LinkResolver::resolve_invoke(info, receiver, pool, 748 get_index_u2_cpcache(thread, bytecode), bytecode, 749 CHECK); 750 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 751 int retry_count = 0; 752 while (info.resolved_method()->is_old()) { 753 // It is very unlikely that method is redefined more than 100 times 754 // in the middle of resolve. If it is looping here more than 100 times 755 // means then there could be a bug here. 756 guarantee((retry_count++ < 100), 757 "Could not resolve to latest version of redefined method"); 758 // method is redefined in the middle of resolve so re-try. 759 LinkResolver::resolve_invoke(info, receiver, pool, 760 get_index_u2_cpcache(thread, bytecode), bytecode, 761 CHECK); 762 } 763 } 764 } // end JvmtiHideSingleStepping 765 766 // check if link resolution caused cpCache to be updated 767 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 768 if (cp_cache_entry->is_resolved(bytecode)) return; 769 770 #ifdef ASSERT 771 if (bytecode == Bytecodes::_invokeinterface) { 772 if (info.resolved_method()->method_holder() == 773 SystemDictionary::Object_klass()) { 774 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 775 // (see also CallInfo::set_interface for details) 776 assert(info.call_kind() == CallInfo::vtable_call || 777 info.call_kind() == CallInfo::direct_call, ""); 778 methodHandle rm = info.resolved_method(); 779 assert(rm->is_final() || info.has_vtable_index(), 780 "should have been set already"); 781 } else if (!info.resolved_method()->has_itable_index()) { 782 // Resolved something like CharSequence.toString. Use vtable not itable. 783 assert(info.call_kind() != CallInfo::itable_call, ""); 784 } else { 785 // Setup itable entry 786 assert(info.call_kind() == CallInfo::itable_call, ""); 787 int index = info.resolved_method()->itable_index(); 788 assert(info.itable_index() == index, ""); 789 } 790 } else { 791 assert(info.call_kind() == CallInfo::direct_call || 792 info.call_kind() == CallInfo::vtable_call, ""); 793 } 794 #endif 795 switch (info.call_kind()) { 796 case CallInfo::direct_call: 797 cp_cache_entry->set_direct_call( 798 bytecode, 799 info.resolved_method()); 800 break; 801 case CallInfo::vtable_call: 802 cp_cache_entry->set_vtable_call( 803 bytecode, 804 info.resolved_method(), 805 info.vtable_index()); 806 break; 807 case CallInfo::itable_call: 808 cp_cache_entry->set_itable_call( 809 bytecode, 810 info.resolved_method(), 811 info.itable_index()); 812 break; 813 default: ShouldNotReachHere(); 814 } 815 } 816 817 818 // First time execution: Resolve symbols, create a permanent MethodType object. 819 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 820 Thread* THREAD = thread; 821 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 822 823 // resolve method 824 CallInfo info; 825 constantPoolHandle pool(thread, method(thread)->constants()); 826 { 827 JvmtiHideSingleStepping jhss(thread); 828 LinkResolver::resolve_invoke(info, Handle(), pool, 829 get_index_u2_cpcache(thread, bytecode), bytecode, 830 CHECK); 831 } // end JvmtiHideSingleStepping 832 833 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 834 cp_cache_entry->set_method_handle(pool, info); 835 } 836 837 // First time execution: Resolve symbols, create a permanent CallSite object. 838 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 839 Thread* THREAD = thread; 840 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 841 842 //TO DO: consider passing BCI to Java. 843 // int caller_bci = method(thread)->bci_from(bcp(thread)); 844 845 // resolve method 846 CallInfo info; 847 constantPoolHandle pool(thread, method(thread)->constants()); 848 int index = get_index_u4(thread, bytecode); 849 { 850 JvmtiHideSingleStepping jhss(thread); 851 LinkResolver::resolve_invoke(info, Handle(), pool, 852 index, bytecode, CHECK); 853 } // end JvmtiHideSingleStepping 854 855 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 856 cp_cache_entry->set_dynamic_call(pool, info); 857 } 858 859 // This function is the interface to the assembly code. It returns the resolved 860 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 861 // This function will check for redefinition! 862 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 863 switch (bytecode) { 864 case Bytecodes::_getstatic: 865 case Bytecodes::_putstatic: 866 case Bytecodes::_getfield: 867 case Bytecodes::_putfield: 868 resolve_get_put(thread, bytecode); 869 break; 870 case Bytecodes::_invokevirtual: 871 case Bytecodes::_invokespecial: 872 case Bytecodes::_invokestatic: 873 case Bytecodes::_invokeinterface: 874 resolve_invoke(thread, bytecode); 875 break; 876 case Bytecodes::_invokehandle: 877 resolve_invokehandle(thread); 878 break; 879 case Bytecodes::_invokedynamic: 880 resolve_invokedynamic(thread); 881 break; 882 default: 883 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 884 break; 885 } 886 } 887 IRT_END 888 889 //------------------------------------------------------------------------------------------------------------------------ 890 // Miscellaneous 891 892 893 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 894 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 895 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 896 if (branch_bcp != NULL && nm != NULL) { 897 // This was a successful request for an OSR nmethod. Because 898 // frequency_counter_overflow_inner ends with a safepoint check, 899 // nm could have been unloaded so look it up again. It's unsafe 900 // to examine nm directly since it might have been freed and used 901 // for something else. 902 frame fr = thread->last_frame(); 903 Method* method = fr.interpreter_frame_method(); 904 int bci = method->bci_from(fr.interpreter_frame_bcp()); 905 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 906 } 907 #ifndef PRODUCT 908 if (TraceOnStackReplacement) { 909 if (nm != NULL) { 910 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 911 nm->print(); 912 } 913 } 914 #endif 915 return nm; 916 } 917 918 IRT_ENTRY(nmethod*, 919 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 920 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 921 // flag, in case this method triggers classloading which will call into Java. 922 UnlockFlagSaver fs(thread); 923 924 frame fr = thread->last_frame(); 925 assert(fr.is_interpreted_frame(), "must come from interpreter"); 926 methodHandle method(thread, fr.interpreter_frame_method()); 927 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 928 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 929 930 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 931 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 932 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 933 934 if (osr_nm != NULL) { 935 // We may need to do on-stack replacement which requires that no 936 // monitors in the activation are biased because their 937 // BasicObjectLocks will need to migrate during OSR. Force 938 // unbiasing of all monitors in the activation now (even though 939 // the OSR nmethod might be invalidated) because we don't have a 940 // safepoint opportunity later once the migration begins. 941 if (UseBiasedLocking) { 942 ResourceMark rm; 943 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 944 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 945 kptr < fr.interpreter_frame_monitor_begin(); 946 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 947 if( kptr->obj() != NULL ) { 948 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 949 } 950 } 951 BiasedLocking::revoke(objects_to_revoke); 952 } 953 } 954 return osr_nm; 955 IRT_END 956 957 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 958 assert(ProfileInterpreter, "must be profiling interpreter"); 959 int bci = method->bci_from(cur_bcp); 960 MethodData* mdo = method->method_data(); 961 if (mdo == NULL) return 0; 962 return mdo->bci_to_di(bci); 963 IRT_END 964 965 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 966 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 967 // flag, in case this method triggers classloading which will call into Java. 968 UnlockFlagSaver fs(thread); 969 970 assert(ProfileInterpreter, "must be profiling interpreter"); 971 frame fr = thread->last_frame(); 972 assert(fr.is_interpreted_frame(), "must come from interpreter"); 973 methodHandle method(thread, fr.interpreter_frame_method()); 974 Method::build_interpreter_method_data(method, THREAD); 975 if (HAS_PENDING_EXCEPTION) { 976 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 977 CLEAR_PENDING_EXCEPTION; 978 // and fall through... 979 } 980 IRT_END 981 982 983 #ifdef ASSERT 984 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 985 assert(ProfileInterpreter, "must be profiling interpreter"); 986 987 MethodData* mdo = method->method_data(); 988 assert(mdo != NULL, "must not be null"); 989 990 int bci = method->bci_from(bcp); 991 992 address mdp2 = mdo->bci_to_dp(bci); 993 if (mdp != mdp2) { 994 ResourceMark rm; 995 ResetNoHandleMark rnm; // In a LEAF entry. 996 HandleMark hm; 997 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 998 int current_di = mdo->dp_to_di(mdp); 999 int expected_di = mdo->dp_to_di(mdp2); 1000 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1001 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1002 int approx_bci = -1; 1003 if (current_di >= 0) { 1004 approx_bci = mdo->data_at(current_di)->bci(); 1005 } 1006 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1007 mdo->print_on(tty); 1008 method->print_codes(); 1009 } 1010 assert(mdp == mdp2, "wrong mdp"); 1011 IRT_END 1012 #endif // ASSERT 1013 1014 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1015 assert(ProfileInterpreter, "must be profiling interpreter"); 1016 ResourceMark rm(thread); 1017 HandleMark hm(thread); 1018 frame fr = thread->last_frame(); 1019 assert(fr.is_interpreted_frame(), "must come from interpreter"); 1020 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 1021 1022 // Grab a lock to ensure atomic access to setting the return bci and 1023 // the displacement. This can block and GC, invalidating all naked oops. 1024 MutexLocker ml(RetData_lock); 1025 1026 // ProfileData is essentially a wrapper around a derived oop, so we 1027 // need to take the lock before making any ProfileData structures. 1028 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 1029 RetData* rdata = data->as_RetData(); 1030 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1031 fr.interpreter_frame_set_mdp(new_mdp); 1032 IRT_END 1033 1034 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1035 MethodCounters* mcs = Method::build_method_counters(m, thread); 1036 if (HAS_PENDING_EXCEPTION) { 1037 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1038 CLEAR_PENDING_EXCEPTION; 1039 } 1040 return mcs; 1041 IRT_END 1042 1043 1044 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1045 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1046 // stack traversal automatically takes care of preserving arguments for invoke, so 1047 // this is no longer needed. 1048 1049 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1050 // if this is called during a safepoint 1051 1052 if (JvmtiExport::should_post_single_step()) { 1053 // We are called during regular safepoints and when the VM is 1054 // single stepping. If any thread is marked for single stepping, 1055 // then we may have JVMTI work to do. 1056 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1057 } 1058 IRT_END 1059 1060 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1061 ConstantPoolCacheEntry *cp_entry)) 1062 1063 // check the access_flags for the field in the klass 1064 1065 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1066 int index = cp_entry->field_index(); 1067 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1068 1069 bool is_static = (obj == NULL); 1070 HandleMark hm(thread); 1071 1072 Handle h_obj; 1073 if (!is_static) { 1074 // non-static field accessors have an object, but we need a handle 1075 h_obj = Handle(thread, obj); 1076 } 1077 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1078 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1079 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1080 IRT_END 1081 1082 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1083 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1084 1085 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1086 1087 // check the access_flags for the field in the klass 1088 InstanceKlass* ik = InstanceKlass::cast(k); 1089 int index = cp_entry->field_index(); 1090 // bail out if field modifications are not watched 1091 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1092 1093 char sig_type = '\0'; 1094 1095 switch(cp_entry->flag_state()) { 1096 case btos: sig_type = 'B'; break; 1097 case ztos: sig_type = 'Z'; break; 1098 case ctos: sig_type = 'C'; break; 1099 case stos: sig_type = 'S'; break; 1100 case itos: sig_type = 'I'; break; 1101 case ftos: sig_type = 'F'; break; 1102 case atos: sig_type = 'L'; break; 1103 case ltos: sig_type = 'J'; break; 1104 case dtos: sig_type = 'D'; break; 1105 default: ShouldNotReachHere(); return; 1106 } 1107 bool is_static = (obj == NULL); 1108 1109 HandleMark hm(thread); 1110 instanceKlassHandle h_klass(thread, k); 1111 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1112 jvalue fvalue; 1113 #ifdef _LP64 1114 fvalue = *value; 1115 #else 1116 // Long/double values are stored unaligned and also noncontiguously with 1117 // tagged stacks. We can't just do a simple assignment even in the non- 1118 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1119 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1120 // We assume that the two halves of longs/doubles are stored in interpreter 1121 // stack slots in platform-endian order. 1122 jlong_accessor u; 1123 jint* newval = (jint*)value; 1124 u.words[0] = newval[0]; 1125 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1126 fvalue.j = u.long_value; 1127 #endif // _LP64 1128 1129 Handle h_obj; 1130 if (!is_static) { 1131 // non-static field accessors have an object, but we need a handle 1132 h_obj = Handle(thread, obj); 1133 } 1134 1135 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1136 fid, sig_type, &fvalue); 1137 IRT_END 1138 1139 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1140 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1141 IRT_END 1142 1143 1144 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1145 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1146 IRT_END 1147 1148 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1149 { 1150 return (Interpreter::contains(pc) ? 1 : 0); 1151 } 1152 IRT_END 1153 1154 1155 // Implementation of SignatureHandlerLibrary 1156 1157 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1158 // Dummy definition (else normalization method is defined in CPU 1159 // dependant code) 1160 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1161 return fingerprint; 1162 } 1163 #endif 1164 1165 address SignatureHandlerLibrary::set_handler_blob() { 1166 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1167 if (handler_blob == NULL) { 1168 return NULL; 1169 } 1170 address handler = handler_blob->code_begin(); 1171 _handler_blob = handler_blob; 1172 _handler = handler; 1173 return handler; 1174 } 1175 1176 void SignatureHandlerLibrary::initialize() { 1177 if (_fingerprints != NULL) { 1178 return; 1179 } 1180 if (set_handler_blob() == NULL) { 1181 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1182 } 1183 1184 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1185 SignatureHandlerLibrary::buffer_size); 1186 _buffer = bb->code_begin(); 1187 1188 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1189 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1190 } 1191 1192 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1193 address handler = _handler; 1194 int insts_size = buffer->pure_insts_size(); 1195 if (handler + insts_size > _handler_blob->code_end()) { 1196 // get a new handler blob 1197 handler = set_handler_blob(); 1198 } 1199 if (handler != NULL) { 1200 memcpy(handler, buffer->insts_begin(), insts_size); 1201 pd_set_handler(handler); 1202 ICache::invalidate_range(handler, insts_size); 1203 _handler = handler + insts_size; 1204 } 1205 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler); 1206 return handler; 1207 } 1208 1209 void SignatureHandlerLibrary::add(const methodHandle& method) { 1210 if (method->signature_handler() == NULL) { 1211 // use slow signature handler if we can't do better 1212 int handler_index = -1; 1213 // check if we can use customized (fast) signature handler 1214 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1215 // use customized signature handler 1216 MutexLocker mu(SignatureHandlerLibrary_lock); 1217 // make sure data structure is initialized 1218 initialize(); 1219 // lookup method signature's fingerprint 1220 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1221 // allow CPU dependant code to optimize the fingerprints for the fast handler 1222 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1223 handler_index = _fingerprints->find(fingerprint); 1224 // create handler if necessary 1225 if (handler_index < 0) { 1226 ResourceMark rm; 1227 ptrdiff_t align_offset = (address) 1228 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1229 CodeBuffer buffer((address)(_buffer + align_offset), 1230 SignatureHandlerLibrary::buffer_size - align_offset); 1231 if (!CodeCacheExtensions::support_dynamic_code()) { 1232 // we need a name for the signature (for lookups or saving) 1233 const int SYMBOL_SIZE = 50; 1234 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE); 1235 // support for named signatures 1236 jio_snprintf(symbolName, SYMBOL_SIZE, 1237 "native_" UINT64_FORMAT, fingerprint); 1238 buffer.set_name(symbolName); 1239 } 1240 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1241 // copy into code heap 1242 address handler = set_handler(&buffer); 1243 if (handler == NULL) { 1244 // use slow signature handler (without memorizing it in the fingerprints) 1245 } else { 1246 // debugging suppport 1247 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1248 ttyLocker ttyl; 1249 tty->cr(); 1250 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1251 _handlers->length(), 1252 (method->is_static() ? "static" : "receiver"), 1253 method->name_and_sig_as_C_string(), 1254 fingerprint, 1255 buffer.insts_size()); 1256 if (buffer.insts_size() > 0) { 1257 // buffer may be empty for pregenerated handlers 1258 Disassembler::decode(handler, handler + buffer.insts_size()); 1259 } 1260 #ifndef PRODUCT 1261 address rh_begin = Interpreter::result_handler(method()->result_type()); 1262 if (CodeCache::contains(rh_begin)) { 1263 // else it might be special platform dependent values 1264 tty->print_cr(" --- associated result handler ---"); 1265 address rh_end = rh_begin; 1266 while (*(int*)rh_end != 0) { 1267 rh_end += sizeof(int); 1268 } 1269 Disassembler::decode(rh_begin, rh_end); 1270 } else { 1271 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1272 } 1273 #endif 1274 } 1275 // add handler to library 1276 _fingerprints->append(fingerprint); 1277 _handlers->append(handler); 1278 // set handler index 1279 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1280 handler_index = _fingerprints->length() - 1; 1281 } 1282 } 1283 // Set handler under SignatureHandlerLibrary_lock 1284 if (handler_index < 0) { 1285 // use generic signature handler 1286 method->set_signature_handler(Interpreter::slow_signature_handler()); 1287 } else { 1288 // set handler 1289 method->set_signature_handler(_handlers->at(handler_index)); 1290 } 1291 } else { 1292 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1293 // use generic signature handler 1294 method->set_signature_handler(Interpreter::slow_signature_handler()); 1295 } 1296 } 1297 #ifdef ASSERT 1298 int handler_index = -1; 1299 int fingerprint_index = -2; 1300 { 1301 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1302 // in any way if accessed from multiple threads. To avoid races with another 1303 // thread which may change the arrays in the above, mutex protected block, we 1304 // have to protect this read access here with the same mutex as well! 1305 MutexLocker mu(SignatureHandlerLibrary_lock); 1306 if (_handlers != NULL) { 1307 handler_index = _handlers->find(method->signature_handler()); 1308 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1309 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1310 fingerprint_index = _fingerprints->find(fingerprint); 1311 } 1312 } 1313 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1314 handler_index == fingerprint_index, "sanity check"); 1315 #endif // ASSERT 1316 } 1317 1318 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1319 int handler_index = -1; 1320 // use customized signature handler 1321 MutexLocker mu(SignatureHandlerLibrary_lock); 1322 // make sure data structure is initialized 1323 initialize(); 1324 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1325 handler_index = _fingerprints->find(fingerprint); 1326 // create handler if necessary 1327 if (handler_index < 0) { 1328 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1329 tty->cr(); 1330 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1331 _handlers->length(), 1332 p2i(handler), 1333 fingerprint); 1334 } 1335 _fingerprints->append(fingerprint); 1336 _handlers->append(handler); 1337 } else { 1338 if (PrintSignatureHandlers) { 1339 tty->cr(); 1340 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1341 _handlers->length(), 1342 fingerprint, 1343 p2i(_handlers->at(handler_index)), 1344 p2i(handler)); 1345 } 1346 } 1347 } 1348 1349 1350 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1351 address SignatureHandlerLibrary::_handler = NULL; 1352 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1353 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1354 address SignatureHandlerLibrary::_buffer = NULL; 1355 1356 1357 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1358 methodHandle m(thread, method); 1359 assert(m->is_native(), "sanity check"); 1360 // lookup native function entry point if it doesn't exist 1361 bool in_base_library; 1362 if (!m->has_native_function()) { 1363 NativeLookup::lookup(m, in_base_library, CHECK); 1364 } 1365 // make sure signature handler is installed 1366 SignatureHandlerLibrary::add(m); 1367 // The interpreter entry point checks the signature handler first, 1368 // before trying to fetch the native entry point and klass mirror. 1369 // We must set the signature handler last, so that multiple processors 1370 // preparing the same method will be sure to see non-null entry & mirror. 1371 IRT_END 1372 1373 #if defined(IA32) || defined(AMD64) || defined(ARM) 1374 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1375 if (src_address == dest_address) { 1376 return; 1377 } 1378 ResetNoHandleMark rnm; // In a LEAF entry. 1379 HandleMark hm; 1380 ResourceMark rm; 1381 frame fr = thread->last_frame(); 1382 assert(fr.is_interpreted_frame(), ""); 1383 jint bci = fr.interpreter_frame_bci(); 1384 methodHandle mh(thread, fr.interpreter_frame_method()); 1385 Bytecode_invoke invoke(mh, bci); 1386 ArgumentSizeComputer asc(invoke.signature()); 1387 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1388 Copy::conjoint_jbytes(src_address, dest_address, 1389 size_of_arguments * Interpreter::stackElementSize); 1390 IRT_END 1391 #endif 1392 1393 #if INCLUDE_JVMTI 1394 // This is a support of the JVMTI PopFrame interface. 1395 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1396 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1397 // The member_name argument is a saved reference (in local#0) to the member_name. 1398 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1399 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1400 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1401 Method* method, address bcp)) 1402 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1403 if (code != Bytecodes::_invokestatic) { 1404 return; 1405 } 1406 ConstantPool* cpool = method->constants(); 1407 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1408 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1409 Symbol* mname = cpool->name_ref_at(cp_index); 1410 1411 if (MethodHandles::has_member_arg(cname, mname)) { 1412 oop member_name_oop = (oop) member_name; 1413 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1414 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1415 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1416 } 1417 thread->set_vm_result(member_name_oop); 1418 } else { 1419 thread->set_vm_result(NULL); 1420 } 1421 IRT_END 1422 #endif // INCLUDE_JVMTI 1423 1424 #ifndef PRODUCT 1425 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to 1426 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1427 // The generated code still uses call_VM because that will set up the frame pointer for 1428 // bcp and method. 1429 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1430 const frame f = thread->last_frame(); 1431 assert(f.is_interpreted_frame(), "must be an interpreted frame"); 1432 methodHandle mh(thread, f.interpreter_frame_method()); 1433 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); 1434 return preserve_this_value; 1435 IRT_END 1436 #endif // !PRODUCT