1 /* 2 * Copyright (c) 1997, 2010, 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 "incls/_precompiled.incl" 26 #include "incls/_interpreterRuntime.cpp.incl" 27 28 class UnlockFlagSaver { 29 private: 30 JavaThread* _thread; 31 bool _do_not_unlock; 32 public: 33 UnlockFlagSaver(JavaThread* t) { 34 _thread = t; 35 _do_not_unlock = t->do_not_unlock_if_synchronized(); 36 t->set_do_not_unlock_if_synchronized(false); 37 } 38 ~UnlockFlagSaver() { 39 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 40 } 41 }; 42 43 //------------------------------------------------------------------------------------------------------------------------ 44 // State accessors 45 46 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 47 last_frame(thread).interpreter_frame_set_bcp(bcp); 48 if (ProfileInterpreter) { 49 // ProfileTraps uses MDOs independently of ProfileInterpreter. 50 // That is why we must check both ProfileInterpreter and mdo != NULL. 51 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); 52 if (mdo != NULL) { 53 NEEDS_CLEANUP; 54 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 55 } 56 } 57 } 58 59 //------------------------------------------------------------------------------------------------------------------------ 60 // Constants 61 62 63 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 64 // access constant pool 65 constantPoolOop pool = method(thread)->constants(); 66 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 67 constantTag tag = pool->tag_at(index); 68 69 if (tag.is_unresolved_klass() || tag.is_klass()) { 70 klassOop klass = pool->klass_at(index, CHECK); 71 oop java_class = klass->klass_part()->java_mirror(); 72 thread->set_vm_result(java_class); 73 } else { 74 #ifdef ASSERT 75 // If we entered this runtime routine, we believed the tag contained 76 // an unresolved string, an unresolved class or a resolved class. 77 // However, another thread could have resolved the unresolved string 78 // or class by the time we go there. 79 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); 80 #endif 81 oop s_oop = pool->string_at(index, CHECK); 82 thread->set_vm_result(s_oop); 83 } 84 IRT_END 85 86 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 87 assert(bytecode == Bytecodes::_fast_aldc || 88 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 89 ResourceMark rm(thread); 90 methodHandle m (thread, method(thread)); 91 Bytecode_loadconstant* ldc = Bytecode_loadconstant_at(m, bci(thread)); 92 oop result = ldc->resolve_constant(THREAD); 93 DEBUG_ONLY(ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc->cache_index())); 94 assert(result == cpce->f1(), "expected result for assembly code"); 95 } 96 IRT_END 97 98 99 //------------------------------------------------------------------------------------------------------------------------ 100 // Allocation 101 102 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) 103 klassOop k_oop = pool->klass_at(index, CHECK); 104 instanceKlassHandle klass (THREAD, k_oop); 105 106 // Make sure we are not instantiating an abstract klass 107 klass->check_valid_for_instantiation(true, CHECK); 108 109 // Make sure klass is initialized 110 klass->initialize(CHECK); 111 112 // At this point the class may not be fully initialized 113 // because of recursive initialization. If it is fully 114 // initialized & has_finalized is not set, we rewrite 115 // it into its fast version (Note: no locking is needed 116 // here since this is an atomic byte write and can be 117 // done more than once). 118 // 119 // Note: In case of classes with has_finalized we don't 120 // rewrite since that saves us an extra check in 121 // the fast version which then would call the 122 // slow version anyway (and do a call back into 123 // Java). 124 // If we have a breakpoint, then we don't rewrite 125 // because the _breakpoint bytecode would be lost. 126 oop obj = klass->allocate_instance(CHECK); 127 thread->set_vm_result(obj); 128 IRT_END 129 130 131 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 132 oop obj = oopFactory::new_typeArray(type, size, CHECK); 133 thread->set_vm_result(obj); 134 IRT_END 135 136 137 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) 138 // Note: no oopHandle for pool & klass needed since they are not used 139 // anymore after new_objArray() and no GC can happen before. 140 // (This may have to change if this code changes!) 141 klassOop klass = pool->klass_at(index, CHECK); 142 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 143 thread->set_vm_result(obj); 144 IRT_END 145 146 147 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 148 // We may want to pass in more arguments - could make this slightly faster 149 constantPoolOop constants = method(thread)->constants(); 150 int i = get_index_u2(thread, Bytecodes::_multianewarray); 151 klassOop klass = constants->klass_at(i, CHECK); 152 int nof_dims = number_of_dimensions(thread); 153 assert(oop(klass)->is_klass(), "not a class"); 154 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 155 156 // We must create an array of jints to pass to multi_allocate. 157 ResourceMark rm(thread); 158 const int small_dims = 10; 159 jint dim_array[small_dims]; 160 jint *dims = &dim_array[0]; 161 if (nof_dims > small_dims) { 162 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 163 } 164 for (int index = 0; index < nof_dims; index++) { 165 // offset from first_size_address is addressed as local[index] 166 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 167 dims[index] = first_size_address[n]; 168 } 169 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 170 thread->set_vm_result(obj); 171 IRT_END 172 173 174 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 175 assert(obj->is_oop(), "must be a valid oop"); 176 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); 177 instanceKlass::register_finalizer(instanceOop(obj), CHECK); 178 IRT_END 179 180 181 // Quicken instance-of and check-cast bytecodes 182 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 183 // Force resolving; quicken the bytecode 184 int which = get_index_u2(thread, Bytecodes::_checkcast); 185 constantPoolOop cpool = method(thread)->constants(); 186 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 187 // program we might have seen an unquick'd bytecode in the interpreter but have another 188 // thread quicken the bytecode before we get here. 189 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 190 klassOop klass = cpool->klass_at(which, CHECK); 191 thread->set_vm_result(klass); 192 IRT_END 193 194 195 //------------------------------------------------------------------------------------------------------------------------ 196 // Exceptions 197 198 // Assume the compiler is (or will be) interested in this event. 199 // If necessary, create an MDO to hold the information, and record it. 200 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 201 assert(ProfileTraps, "call me only if profiling"); 202 methodHandle trap_method(thread, method(thread)); 203 204 if (trap_method.not_null()) { 205 methodDataHandle trap_mdo(thread, trap_method->method_data()); 206 if (trap_mdo.is_null()) { 207 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); 208 if (HAS_PENDING_EXCEPTION) { 209 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 210 CLEAR_PENDING_EXCEPTION; 211 } 212 trap_mdo = methodDataHandle(thread, trap_method->method_data()); 213 // and fall through... 214 } 215 if (trap_mdo.not_null()) { 216 // Update per-method count of trap events. The interpreter 217 // is updating the MDO to simulate the effect of compiler traps. 218 int trap_bci = trap_method->bci_from(bcp(thread)); 219 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 220 } 221 } 222 } 223 224 static Handle get_preinitialized_exception(klassOop k, TRAPS) { 225 // get klass 226 instanceKlass* klass = instanceKlass::cast(k); 227 assert(klass->is_initialized(), 228 "this klass should have been initialized during VM initialization"); 229 // create instance - do not call constructor since we may have no 230 // (java) stack space left (should assert constructor is empty) 231 Handle exception; 232 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 233 exception = Handle(THREAD, exception_oop); 234 if (StackTraceInThrowable) { 235 java_lang_Throwable::fill_in_stack_trace(exception); 236 } 237 return exception; 238 } 239 240 // Special handling for stack overflow: since we don't have any (java) stack 241 // space left we use the pre-allocated & pre-initialized StackOverflowError 242 // klass to create an stack overflow error instance. We do not call its 243 // constructor for the same reason (it is empty, anyway). 244 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 245 Handle exception = get_preinitialized_exception( 246 SystemDictionary::StackOverflowError_klass(), 247 CHECK); 248 THROW_HANDLE(exception); 249 IRT_END 250 251 252 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 253 // lookup exception klass 254 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 255 if (ProfileTraps) { 256 if (s == vmSymbols::java_lang_ArithmeticException()) { 257 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 258 } else if (s == vmSymbols::java_lang_NullPointerException()) { 259 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 260 } 261 } 262 // create exception 263 Handle exception = Exceptions::new_exception(thread, s(), message); 264 thread->set_vm_result(exception()); 265 IRT_END 266 267 268 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 269 ResourceMark rm(thread); 270 const char* klass_name = Klass::cast(obj->klass())->external_name(); 271 // lookup exception klass 272 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 273 if (ProfileTraps) { 274 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 275 } 276 // create exception, with klass name as detail message 277 Handle exception = Exceptions::new_exception(thread, s(), klass_name); 278 thread->set_vm_result(exception()); 279 IRT_END 280 281 282 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 283 char message[jintAsStringSize]; 284 // lookup exception klass 285 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 286 if (ProfileTraps) { 287 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 288 } 289 // create exception 290 sprintf(message, "%d", index); 291 THROW_MSG(s(), message); 292 IRT_END 293 294 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 295 JavaThread* thread, oopDesc* obj)) 296 297 ResourceMark rm(thread); 298 char* message = SharedRuntime::generate_class_cast_message( 299 thread, Klass::cast(obj->klass())->external_name()); 300 301 if (ProfileTraps) { 302 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 303 } 304 305 // create exception 306 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 307 IRT_END 308 309 // required can be either a MethodType, or a Class (for a single argument) 310 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) 311 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, 312 oopDesc* required, 313 oopDesc* actual)) { 314 ResourceMark rm(thread); 315 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); 316 317 if (ProfileTraps) { 318 note_trap(thread, Deoptimization::Reason_constraint, CHECK); 319 } 320 321 // create exception 322 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); 323 } 324 IRT_END 325 326 327 328 // exception_handler_for_exception(...) returns the continuation address, 329 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 330 // The exception oop is returned to make sure it is preserved over GC (it 331 // is only on the stack if the exception was thrown explicitly via athrow). 332 // During this operation, the expression stack contains the values for the 333 // bci where the exception happened. If the exception was propagated back 334 // from a call, the expression stack contains the values for the bci at the 335 // invoke w/o arguments (i.e., as if one were inside the call). 336 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 337 338 Handle h_exception(thread, exception); 339 methodHandle h_method (thread, method(thread)); 340 constantPoolHandle h_constants(thread, h_method->constants()); 341 typeArrayHandle h_extable (thread, h_method->exception_table()); 342 bool should_repeat; 343 int handler_bci; 344 int current_bci = bci(thread); 345 346 // Need to do this check first since when _do_not_unlock_if_synchronized 347 // is set, we don't want to trigger any classloading which may make calls 348 // into java, or surprisingly find a matching exception handler for bci 0 349 // since at this moment the method hasn't been "officially" entered yet. 350 if (thread->do_not_unlock_if_synchronized()) { 351 ResourceMark rm; 352 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 353 thread->set_vm_result(exception); 354 #ifdef CC_INTERP 355 return (address) -1; 356 #else 357 return Interpreter::remove_activation_entry(); 358 #endif 359 } 360 361 do { 362 should_repeat = false; 363 364 // assertions 365 #ifdef ASSERT 366 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 367 assert(h_exception->is_oop(), "just checking"); 368 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 369 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 370 if (ExitVMOnVerifyError) vm_exit(-1); 371 ShouldNotReachHere(); 372 } 373 #endif 374 375 // tracing 376 if (TraceExceptions) { 377 ttyLocker ttyl; 378 ResourceMark rm(thread); 379 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 380 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 381 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 382 } 383 // Don't go paging in something which won't be used. 384 // else if (h_extable->length() == 0) { 385 // // disabled for now - interpreter is not using shortcut yet 386 // // (shortcut is not to call runtime if we have no exception handlers) 387 // // warning("performance bug: should not call runtime if method has no exception handlers"); 388 // } 389 // for AbortVMOnException flag 390 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 391 392 // exception handler lookup 393 KlassHandle h_klass(THREAD, h_exception->klass()); 394 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); 395 if (HAS_PENDING_EXCEPTION) { 396 // We threw an exception while trying to find the exception handler. 397 // Transfer the new exception to the exception handle which will 398 // be set into thread local storage, and do another lookup for an 399 // exception handler for this exception, this time starting at the 400 // BCI of the exception handler which caused the exception to be 401 // thrown (bug 4307310). 402 h_exception = Handle(THREAD, PENDING_EXCEPTION); 403 CLEAR_PENDING_EXCEPTION; 404 if (handler_bci >= 0) { 405 current_bci = handler_bci; 406 should_repeat = true; 407 } 408 } 409 } while (should_repeat == true); 410 411 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 412 // time throw or a stack unwinding throw and accordingly notify the debugger 413 if (JvmtiExport::can_post_on_exceptions()) { 414 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 415 } 416 417 #ifdef CC_INTERP 418 address continuation = (address)(intptr_t) handler_bci; 419 #else 420 address continuation = NULL; 421 #endif 422 address handler_pc = NULL; 423 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 424 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 425 // handler in this method, or (b) after a stack overflow there is not yet 426 // enough stack space available to reprotect the stack. 427 #ifndef CC_INTERP 428 continuation = Interpreter::remove_activation_entry(); 429 #endif 430 // Count this for compilation purposes 431 h_method->interpreter_throwout_increment(); 432 } else { 433 // handler in this method => change bci/bcp to handler bci/bcp and continue there 434 handler_pc = h_method->code_base() + handler_bci; 435 #ifndef CC_INTERP 436 set_bcp_and_mdp(handler_pc, thread); 437 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 438 #endif 439 } 440 // notify debugger of an exception catch 441 // (this is good for exceptions caught in native methods as well) 442 if (JvmtiExport::can_post_on_exceptions()) { 443 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 444 } 445 446 thread->set_vm_result(h_exception()); 447 return continuation; 448 IRT_END 449 450 451 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 452 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 453 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 454 IRT_END 455 456 457 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 458 THROW(vmSymbols::java_lang_AbstractMethodError()); 459 IRT_END 460 461 462 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 463 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 464 IRT_END 465 466 467 //------------------------------------------------------------------------------------------------------------------------ 468 // Fields 469 // 470 471 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 472 // resolve field 473 FieldAccessInfo info; 474 constantPoolHandle pool(thread, method(thread)->constants()); 475 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 476 477 { 478 JvmtiHideSingleStepping jhss(thread); 479 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), 480 bytecode, false, CHECK); 481 } // end JvmtiHideSingleStepping 482 483 // check if link resolution caused cpCache to be updated 484 if (already_resolved(thread)) return; 485 486 // compute auxiliary field attributes 487 TosState state = as_TosState(info.field_type()); 488 489 // We need to delay resolving put instructions on final fields 490 // until we actually invoke one. This is required so we throw 491 // exceptions at the correct place. If we do not resolve completely 492 // in the current pass, leaving the put_code set to zero will 493 // cause the next put instruction to reresolve. 494 bool is_put = (bytecode == Bytecodes::_putfield || 495 bytecode == Bytecodes::_putstatic); 496 Bytecodes::Code put_code = (Bytecodes::Code)0; 497 498 // We also need to delay resolving getstatic instructions until the 499 // class is intitialized. This is required so that access to the static 500 // field will call the initialization function every time until the class 501 // is completely initialized ala. in 2.17.5 in JVM Specification. 502 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); 503 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 504 !klass->is_initialized()); 505 Bytecodes::Code get_code = (Bytecodes::Code)0; 506 507 508 if (!uninitialized_static) { 509 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 510 if (is_put || !info.access_flags().is_final()) { 511 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 512 } 513 } 514 515 cache_entry(thread)->set_field( 516 get_code, 517 put_code, 518 info.klass(), 519 info.field_index(), 520 info.field_offset(), 521 state, 522 info.access_flags().is_final(), 523 info.access_flags().is_volatile() 524 ); 525 IRT_END 526 527 528 //------------------------------------------------------------------------------------------------------------------------ 529 // Synchronization 530 // 531 // The interpreter's synchronization code is factored out so that it can 532 // be shared by method invocation and synchronized blocks. 533 //%note synchronization_3 534 535 static void trace_locking(Handle& h_locking_obj, bool is_locking) { 536 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); 537 } 538 539 540 //%note monitor_1 541 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 542 #ifdef ASSERT 543 thread->last_frame().interpreter_frame_verify_monitor(elem); 544 #endif 545 if (PrintBiasedLockingStatistics) { 546 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 547 } 548 Handle h_obj(thread, elem->obj()); 549 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 550 "must be NULL or an object"); 551 if (UseBiasedLocking) { 552 // Retry fast entry if bias is revoked to avoid unnecessary inflation 553 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 554 } else { 555 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 556 } 557 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 558 "must be NULL or an object"); 559 #ifdef ASSERT 560 thread->last_frame().interpreter_frame_verify_monitor(elem); 561 #endif 562 IRT_END 563 564 565 //%note monitor_1 566 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 567 #ifdef ASSERT 568 thread->last_frame().interpreter_frame_verify_monitor(elem); 569 #endif 570 Handle h_obj(thread, elem->obj()); 571 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 572 "must be NULL or an object"); 573 if (elem == NULL || h_obj()->is_unlocked()) { 574 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 575 } 576 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 577 // Free entry. This must be done here, since a pending exception might be installed on 578 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 579 elem->set_obj(NULL); 580 #ifdef ASSERT 581 thread->last_frame().interpreter_frame_verify_monitor(elem); 582 #endif 583 IRT_END 584 585 586 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 587 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 588 IRT_END 589 590 591 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 592 // Returns an illegal exception to install into the current thread. The 593 // pending_exception flag is cleared so normal exception handling does not 594 // trigger. Any current installed exception will be overwritten. This 595 // method will be called during an exception unwind. 596 597 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 598 Handle exception(thread, thread->vm_result()); 599 assert(exception() != NULL, "vm result should be set"); 600 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 601 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 602 exception = get_preinitialized_exception( 603 SystemDictionary::IllegalMonitorStateException_klass(), 604 CATCH); 605 } 606 thread->set_vm_result(exception()); 607 IRT_END 608 609 610 //------------------------------------------------------------------------------------------------------------------------ 611 // Invokes 612 613 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) 614 return method->orig_bytecode_at(method->bci_from(bcp)); 615 IRT_END 616 617 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) 618 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 619 IRT_END 620 621 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) 622 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 623 IRT_END 624 625 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) 626 // extract receiver from the outgoing argument list if necessary 627 Handle receiver(thread, NULL); 628 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 629 ResourceMark rm(thread); 630 methodHandle m (thread, method(thread)); 631 Bytecode_invoke* call = Bytecode_invoke_at(m, bci(thread)); 632 symbolHandle signature (thread, call->signature()); 633 receiver = Handle(thread, 634 thread->last_frame().interpreter_callee_receiver(signature)); 635 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 636 "sanity check"); 637 assert(receiver.is_null() || 638 Universe::heap()->is_in_reserved(receiver->klass()), 639 "sanity check"); 640 } 641 642 // resolve method 643 CallInfo info; 644 constantPoolHandle pool(thread, method(thread)->constants()); 645 646 { 647 JvmtiHideSingleStepping jhss(thread); 648 LinkResolver::resolve_invoke(info, receiver, pool, 649 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 650 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 651 int retry_count = 0; 652 while (info.resolved_method()->is_old()) { 653 // It is very unlikely that method is redefined more than 100 times 654 // in the middle of resolve. If it is looping here more than 100 times 655 // means then there could be a bug here. 656 guarantee((retry_count++ < 100), 657 "Could not resolve to latest version of redefined method"); 658 // method is redefined in the middle of resolve so re-try. 659 LinkResolver::resolve_invoke(info, receiver, pool, 660 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 661 } 662 } 663 } // end JvmtiHideSingleStepping 664 665 // check if link resolution caused cpCache to be updated 666 if (already_resolved(thread)) return; 667 668 if (bytecode == Bytecodes::_invokeinterface) { 669 670 if (TraceItables && Verbose) { 671 ResourceMark rm(thread); 672 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 673 } 674 if (info.resolved_method()->method_holder() == 675 SystemDictionary::Object_klass()) { 676 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 677 // (see also cpCacheOop.cpp for details) 678 methodHandle rm = info.resolved_method(); 679 assert(rm->is_final() || info.has_vtable_index(), 680 "should have been set already"); 681 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); 682 } else { 683 // Setup itable entry 684 int index = klassItable::compute_itable_index(info.resolved_method()()); 685 cache_entry(thread)->set_interface_call(info.resolved_method(), index); 686 } 687 } else { 688 cache_entry(thread)->set_method( 689 bytecode, 690 info.resolved_method(), 691 info.vtable_index()); 692 } 693 IRT_END 694 695 696 // First time execution: Resolve symbols, create a permanent CallSite object. 697 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 698 ResourceMark rm(thread); 699 700 assert(EnableInvokeDynamic, ""); 701 702 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 703 704 methodHandle caller_method(thread, method(thread)); 705 706 constantPoolHandle pool(thread, caller_method->constants()); 707 pool->set_invokedynamic(); // mark header to flag active call sites 708 709 int caller_bci = 0; 710 int site_index = 0; 711 { address caller_bcp = bcp(thread); 712 caller_bci = caller_method->bci_from(caller_bcp); 713 site_index = Bytes::get_native_u4(caller_bcp+1); 714 } 715 assert(site_index == InterpreterRuntime::bytecode(thread)->get_index_u4(bytecode), ""); 716 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); 717 // there is a second CPC entries that is of interest; it caches signature info: 718 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); 719 720 // first resolve the signature to a MH.invoke methodOop 721 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { 722 JvmtiHideSingleStepping jhss(thread); 723 CallInfo info; 724 LinkResolver::resolve_invoke(info, Handle(), pool, 725 site_index, bytecode, CHECK); 726 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves 727 // as a common reference point for all invokedynamic call sites with 728 // that exact call descriptor. We will link it in the CP cache exactly 729 // as if it were an invokevirtual of MethodHandle.invoke. 730 pool->cache()->entry_at(main_index)->set_method( 731 bytecode, 732 info.resolved_method(), 733 info.vtable_index()); 734 } 735 736 // The method (f2 entry) of the main entry is the MH.invoke for the 737 // invokedynamic target call signature. 738 oop f1_value = pool->cache()->entry_at(main_index)->f1(); 739 methodHandle signature_invoker(THREAD, (methodOop) f1_value); 740 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), 741 "correct result from LinkResolver::resolve_invokedynamic"); 742 743 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci, 744 main_index, CHECK); 745 if (bootm.is_null()) { 746 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 747 "no bootstrap method found for invokedynamic"); 748 } 749 750 // Short circuit if CallSite has been bound already: 751 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null()) 752 return; 753 754 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index)); 755 756 Handle info; // NYI: Other metadata from a new kind of CP entry. (Annotations?) 757 758 Handle call_site 759 = SystemDictionary::make_dynamic_call_site(bootm, 760 // Callee information: 761 call_site_name, 762 signature_invoker, 763 info, 764 // Caller information: 765 caller_method, 766 caller_bci, 767 CHECK); 768 769 // In the secondary entry, the f1 field is the call site, and the f2 (index) 770 // field is some data about the invoke site. Currently, it is just the BCI. 771 // Later, it might be changed to help manage inlining dependencies. 772 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); 773 } 774 IRT_END 775 776 777 //------------------------------------------------------------------------------------------------------------------------ 778 // Miscellaneous 779 780 781 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 782 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 783 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 784 if (branch_bcp != NULL && nm != NULL) { 785 // This was a successful request for an OSR nmethod. Because 786 // frequency_counter_overflow_inner ends with a safepoint check, 787 // nm could have been unloaded so look it up again. It's unsafe 788 // to examine nm directly since it might have been freed and used 789 // for something else. 790 frame fr = thread->last_frame(); 791 methodOop method = fr.interpreter_frame_method(); 792 int bci = method->bci_from(fr.interpreter_frame_bcp()); 793 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 794 } 795 return nm; 796 } 797 798 IRT_ENTRY(nmethod*, 799 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 800 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 801 // flag, in case this method triggers classloading which will call into Java. 802 UnlockFlagSaver fs(thread); 803 804 frame fr = thread->last_frame(); 805 assert(fr.is_interpreted_frame(), "must come from interpreter"); 806 methodHandle method(thread, fr.interpreter_frame_method()); 807 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 808 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 809 810 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, thread); 811 812 if (osr_nm != NULL) { 813 // We may need to do on-stack replacement which requires that no 814 // monitors in the activation are biased because their 815 // BasicObjectLocks will need to migrate during OSR. Force 816 // unbiasing of all monitors in the activation now (even though 817 // the OSR nmethod might be invalidated) because we don't have a 818 // safepoint opportunity later once the migration begins. 819 if (UseBiasedLocking) { 820 ResourceMark rm; 821 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 822 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 823 kptr < fr.interpreter_frame_monitor_begin(); 824 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 825 if( kptr->obj() != NULL ) { 826 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 827 } 828 } 829 BiasedLocking::revoke(objects_to_revoke); 830 } 831 } 832 return osr_nm; 833 IRT_END 834 835 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) 836 assert(ProfileInterpreter, "must be profiling interpreter"); 837 int bci = method->bci_from(cur_bcp); 838 methodDataOop mdo = method->method_data(); 839 if (mdo == NULL) return 0; 840 return mdo->bci_to_di(bci); 841 IRT_END 842 843 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) 844 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 845 // flag, in case this method triggers classloading which will call into Java. 846 UnlockFlagSaver fs(thread); 847 848 assert(ProfileInterpreter, "must be profiling interpreter"); 849 frame fr = thread->last_frame(); 850 assert(fr.is_interpreted_frame(), "must come from interpreter"); 851 methodHandle method(thread, fr.interpreter_frame_method()); 852 int bci = method->bci_from(cur_bcp); 853 methodOopDesc::build_interpreter_method_data(method, THREAD); 854 if (HAS_PENDING_EXCEPTION) { 855 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 856 CLEAR_PENDING_EXCEPTION; 857 // and fall through... 858 } 859 methodDataOop mdo = method->method_data(); 860 if (mdo == NULL) return 0; 861 return mdo->bci_to_di(bci); 862 IRT_END 863 864 865 #ifdef ASSERT 866 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) 867 assert(ProfileInterpreter, "must be profiling interpreter"); 868 869 methodDataOop mdo = method->method_data(); 870 assert(mdo != NULL, "must not be null"); 871 872 int bci = method->bci_from(bcp); 873 874 address mdp2 = mdo->bci_to_dp(bci); 875 if (mdp != mdp2) { 876 ResourceMark rm; 877 ResetNoHandleMark rnm; // In a LEAF entry. 878 HandleMark hm; 879 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 880 int current_di = mdo->dp_to_di(mdp); 881 int expected_di = mdo->dp_to_di(mdp2); 882 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 883 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 884 int approx_bci = -1; 885 if (current_di >= 0) { 886 approx_bci = mdo->data_at(current_di)->bci(); 887 } 888 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 889 mdo->print_on(tty); 890 method->print_codes(); 891 } 892 assert(mdp == mdp2, "wrong mdp"); 893 IRT_END 894 #endif // ASSERT 895 896 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 897 assert(ProfileInterpreter, "must be profiling interpreter"); 898 ResourceMark rm(thread); 899 HandleMark hm(thread); 900 frame fr = thread->last_frame(); 901 assert(fr.is_interpreted_frame(), "must come from interpreter"); 902 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); 903 904 // Grab a lock to ensure atomic access to setting the return bci and 905 // the displacement. This can block and GC, invalidating all naked oops. 906 MutexLocker ml(RetData_lock); 907 908 // ProfileData is essentially a wrapper around a derived oop, so we 909 // need to take the lock before making any ProfileData structures. 910 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 911 RetData* rdata = data->as_RetData(); 912 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 913 fr.interpreter_frame_set_mdp(new_mdp); 914 IRT_END 915 916 917 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 918 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 919 // stack traversal automatically takes care of preserving arguments for invoke, so 920 // this is no longer needed. 921 922 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 923 // if this is called during a safepoint 924 925 if (JvmtiExport::should_post_single_step()) { 926 // We are called during regular safepoints and when the VM is 927 // single stepping. If any thread is marked for single stepping, 928 // then we may have JVMTI work to do. 929 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 930 } 931 IRT_END 932 933 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 934 ConstantPoolCacheEntry *cp_entry)) 935 936 // check the access_flags for the field in the klass 937 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); 938 typeArrayOop fields = ik->fields(); 939 int index = cp_entry->field_index(); 940 assert(index < fields->length(), "holders field index is out of range"); 941 // bail out if field accesses are not watched 942 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 943 944 switch(cp_entry->flag_state()) { 945 case btos: // fall through 946 case ctos: // fall through 947 case stos: // fall through 948 case itos: // fall through 949 case ftos: // fall through 950 case ltos: // fall through 951 case dtos: // fall through 952 case atos: break; 953 default: ShouldNotReachHere(); return; 954 } 955 bool is_static = (obj == NULL); 956 HandleMark hm(thread); 957 958 Handle h_obj; 959 if (!is_static) { 960 // non-static field accessors have an object, but we need a handle 961 h_obj = Handle(thread, obj); 962 } 963 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); 964 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); 965 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 966 IRT_END 967 968 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 969 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 970 971 klassOop k = (klassOop)cp_entry->f1(); 972 973 // check the access_flags for the field in the klass 974 instanceKlass* ik = instanceKlass::cast(k); 975 typeArrayOop fields = ik->fields(); 976 int index = cp_entry->field_index(); 977 assert(index < fields->length(), "holders field index is out of range"); 978 // bail out if field modifications are not watched 979 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 980 981 char sig_type = '\0'; 982 983 switch(cp_entry->flag_state()) { 984 case btos: sig_type = 'Z'; break; 985 case ctos: sig_type = 'C'; break; 986 case stos: sig_type = 'S'; break; 987 case itos: sig_type = 'I'; break; 988 case ftos: sig_type = 'F'; break; 989 case atos: sig_type = 'L'; break; 990 case ltos: sig_type = 'J'; break; 991 case dtos: sig_type = 'D'; break; 992 default: ShouldNotReachHere(); return; 993 } 994 bool is_static = (obj == NULL); 995 996 HandleMark hm(thread); 997 instanceKlassHandle h_klass(thread, k); 998 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); 999 jvalue fvalue; 1000 #ifdef _LP64 1001 fvalue = *value; 1002 #else 1003 // Long/double values are stored unaligned and also noncontiguously with 1004 // tagged stacks. We can't just do a simple assignment even in the non- 1005 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1006 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1007 // We assume that the two halves of longs/doubles are stored in interpreter 1008 // stack slots in platform-endian order. 1009 jlong_accessor u; 1010 jint* newval = (jint*)value; 1011 u.words[0] = newval[0]; 1012 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1013 fvalue.j = u.long_value; 1014 #endif // _LP64 1015 1016 Handle h_obj; 1017 if (!is_static) { 1018 // non-static field accessors have an object, but we need a handle 1019 h_obj = Handle(thread, obj); 1020 } 1021 1022 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1023 fid, sig_type, &fvalue); 1024 IRT_END 1025 1026 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1027 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1028 IRT_END 1029 1030 1031 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1032 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1033 IRT_END 1034 1035 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1036 { 1037 return (Interpreter::contains(pc) ? 1 : 0); 1038 } 1039 IRT_END 1040 1041 1042 // Implementation of SignatureHandlerLibrary 1043 1044 address SignatureHandlerLibrary::set_handler_blob() { 1045 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1046 if (handler_blob == NULL) { 1047 return NULL; 1048 } 1049 address handler = handler_blob->code_begin(); 1050 _handler_blob = handler_blob; 1051 _handler = handler; 1052 return handler; 1053 } 1054 1055 void SignatureHandlerLibrary::initialize() { 1056 if (_fingerprints != NULL) { 1057 return; 1058 } 1059 if (set_handler_blob() == NULL) { 1060 vm_exit_out_of_memory(blob_size, "native signature handlers"); 1061 } 1062 1063 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1064 SignatureHandlerLibrary::buffer_size); 1065 _buffer = bb->code_begin(); 1066 1067 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); 1068 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); 1069 } 1070 1071 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1072 address handler = _handler; 1073 int insts_size = buffer->pure_insts_size(); 1074 if (handler + insts_size > _handler_blob->code_end()) { 1075 // get a new handler blob 1076 handler = set_handler_blob(); 1077 } 1078 if (handler != NULL) { 1079 memcpy(handler, buffer->insts_begin(), insts_size); 1080 pd_set_handler(handler); 1081 ICache::invalidate_range(handler, insts_size); 1082 _handler = handler + insts_size; 1083 } 1084 return handler; 1085 } 1086 1087 void SignatureHandlerLibrary::add(methodHandle method) { 1088 if (method->signature_handler() == NULL) { 1089 // use slow signature handler if we can't do better 1090 int handler_index = -1; 1091 // check if we can use customized (fast) signature handler 1092 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1093 // use customized signature handler 1094 MutexLocker mu(SignatureHandlerLibrary_lock); 1095 // make sure data structure is initialized 1096 initialize(); 1097 // lookup method signature's fingerprint 1098 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1099 handler_index = _fingerprints->find(fingerprint); 1100 // create handler if necessary 1101 if (handler_index < 0) { 1102 ResourceMark rm; 1103 ptrdiff_t align_offset = (address) 1104 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1105 CodeBuffer buffer((address)(_buffer + align_offset), 1106 SignatureHandlerLibrary::buffer_size - align_offset); 1107 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1108 // copy into code heap 1109 address handler = set_handler(&buffer); 1110 if (handler == NULL) { 1111 // use slow signature handler 1112 } else { 1113 // debugging suppport 1114 if (PrintSignatureHandlers) { 1115 tty->cr(); 1116 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1117 _handlers->length(), 1118 (method->is_static() ? "static" : "receiver"), 1119 method->name_and_sig_as_C_string(), 1120 fingerprint, 1121 buffer.insts_size()); 1122 Disassembler::decode(handler, handler + buffer.insts_size()); 1123 #ifndef PRODUCT 1124 tty->print_cr(" --- associated result handler ---"); 1125 address rh_begin = Interpreter::result_handler(method()->result_type()); 1126 address rh_end = rh_begin; 1127 while (*(int*)rh_end != 0) { 1128 rh_end += sizeof(int); 1129 } 1130 Disassembler::decode(rh_begin, rh_end); 1131 #endif 1132 } 1133 // add handler to library 1134 _fingerprints->append(fingerprint); 1135 _handlers->append(handler); 1136 // set handler index 1137 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1138 handler_index = _fingerprints->length() - 1; 1139 } 1140 } 1141 } else { 1142 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1143 } 1144 if (handler_index < 0) { 1145 // use generic signature handler 1146 method->set_signature_handler(Interpreter::slow_signature_handler()); 1147 } else { 1148 // set handler 1149 method->set_signature_handler(_handlers->at(handler_index)); 1150 } 1151 } 1152 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1153 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), 1154 "sanity check"); 1155 } 1156 1157 1158 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1159 address SignatureHandlerLibrary::_handler = NULL; 1160 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1161 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1162 address SignatureHandlerLibrary::_buffer = NULL; 1163 1164 1165 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) 1166 methodHandle m(thread, method); 1167 assert(m->is_native(), "sanity check"); 1168 // lookup native function entry point if it doesn't exist 1169 bool in_base_library; 1170 if (!m->has_native_function()) { 1171 NativeLookup::lookup(m, in_base_library, CHECK); 1172 } 1173 // make sure signature handler is installed 1174 SignatureHandlerLibrary::add(m); 1175 // The interpreter entry point checks the signature handler first, 1176 // before trying to fetch the native entry point and klass mirror. 1177 // We must set the signature handler last, so that multiple processors 1178 // preparing the same method will be sure to see non-null entry & mirror. 1179 IRT_END 1180 1181 #if defined(IA32) || defined(AMD64) 1182 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1183 if (src_address == dest_address) { 1184 return; 1185 } 1186 ResetNoHandleMark rnm; // In a LEAF entry. 1187 HandleMark hm; 1188 ResourceMark rm; 1189 frame fr = thread->last_frame(); 1190 assert(fr.is_interpreted_frame(), ""); 1191 jint bci = fr.interpreter_frame_bci(); 1192 methodHandle mh(thread, fr.interpreter_frame_method()); 1193 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); 1194 ArgumentSizeComputer asc(invoke->signature()); 1195 int size_of_arguments = (asc.size() + (invoke->has_receiver() ? 1 : 0)); // receiver 1196 Copy::conjoint_jbytes(src_address, dest_address, 1197 size_of_arguments * Interpreter::stackElementSize); 1198 IRT_END 1199 #endif