1 /* 2 * Copyright (c) 1997, 2013, 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/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compileBroker.hpp" 29 #include "compiler/disassembler.hpp" 30 #include "gc_interface/collectedHeap.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "interpreter/interpreterRuntime.hpp" 33 #include "interpreter/linkResolver.hpp" 34 #include "interpreter/templateTable.hpp" 35 #include "memory/oopFactory.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/constantPool.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/methodData.hpp" 40 #include "oops/objArrayKlass.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "oops/symbol.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "prims/nativeLookup.hpp" 45 #include "runtime/biasedLocking.hpp" 46 #include "runtime/compilationPolicy.hpp" 47 #include "runtime/deoptimization.hpp" 48 #include "runtime/fieldDescriptor.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/jfieldIDWorkaround.hpp" 53 #include "runtime/osThread.hpp" 54 #include "runtime/sharedRuntime.hpp" 55 #include "runtime/stubRoutines.hpp" 56 #include "runtime/synchronizer.hpp" 57 #include "runtime/threadCritical.hpp" 58 #include "utilities/events.hpp" 59 #ifdef TARGET_ARCH_x86 60 # include "vm_version_x86.hpp" 61 #endif 62 #ifdef TARGET_ARCH_sparc 63 # include "vm_version_sparc.hpp" 64 #endif 65 #ifdef TARGET_ARCH_zero 66 # include "vm_version_zero.hpp" 67 #endif 68 #ifdef TARGET_ARCH_arm 69 # include "vm_version_arm.hpp" 70 #endif 71 #ifdef TARGET_ARCH_ppc 72 # include "vm_version_ppc.hpp" 73 #endif 74 #ifdef COMPILER2 75 #include "opto/runtime.hpp" 76 #endif 77 78 class UnlockFlagSaver { 79 private: 80 JavaThread* _thread; 81 bool _do_not_unlock; 82 public: 83 UnlockFlagSaver(JavaThread* t) { 84 _thread = t; 85 _do_not_unlock = t->do_not_unlock_if_synchronized(); 86 t->set_do_not_unlock_if_synchronized(false); 87 } 88 ~UnlockFlagSaver() { 89 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 90 } 91 }; 92 93 //------------------------------------------------------------------------------------------------------------------------ 94 // State accessors 95 96 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 97 last_frame(thread).interpreter_frame_set_bcp(bcp); 98 if (ProfileInterpreter) { 99 // ProfileTraps uses MDOs independently of ProfileInterpreter. 100 // That is why we must check both ProfileInterpreter and mdo != NULL. 101 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 102 if (mdo != NULL) { 103 NEEDS_CLEANUP; 104 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 105 } 106 } 107 } 108 109 //------------------------------------------------------------------------------------------------------------------------ 110 // Constants 111 112 113 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 114 // access constant pool 115 ConstantPool* pool = method(thread)->constants(); 116 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 117 constantTag tag = pool->tag_at(index); 118 119 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 120 Klass* klass = pool->klass_at(index, CHECK); 121 oop java_class = klass->java_mirror(); 122 thread->set_vm_result(java_class); 123 IRT_END 124 125 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 126 assert(bytecode == Bytecodes::_fast_aldc || 127 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 128 ResourceMark rm(thread); 129 methodHandle m (thread, method(thread)); 130 Bytecode_loadconstant ldc(m, bci(thread)); 131 oop result = ldc.resolve_constant(CHECK); 132 #ifdef ASSERT 133 { 134 // The bytecode wrappers aren't GC-safe so construct a new one 135 Bytecode_loadconstant ldc2(m, bci(thread)); 136 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 137 assert(result == coop, "expected result for assembly code"); 138 } 139 #endif 140 thread->set_vm_result(result); 141 } 142 IRT_END 143 144 145 //------------------------------------------------------------------------------------------------------------------------ 146 // Allocation 147 148 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 149 Klass* k_oop = pool->klass_at(index, CHECK); 150 instanceKlassHandle klass (THREAD, k_oop); 151 152 // Make sure we are not instantiating an abstract klass 153 klass->check_valid_for_instantiation(true, CHECK); 154 155 // Make sure klass is initialized 156 klass->initialize(CHECK); 157 158 // At this point the class may not be fully initialized 159 // because of recursive initialization. If it is fully 160 // initialized & has_finalized is not set, we rewrite 161 // it into its fast version (Note: no locking is needed 162 // here since this is an atomic byte write and can be 163 // done more than once). 164 // 165 // Note: In case of classes with has_finalized we don't 166 // rewrite since that saves us an extra check in 167 // the fast version which then would call the 168 // slow version anyway (and do a call back into 169 // Java). 170 // If we have a breakpoint, then we don't rewrite 171 // because the _breakpoint bytecode would be lost. 172 oop obj = klass->allocate_instance(CHECK); 173 thread->set_vm_result(obj); 174 IRT_END 175 176 177 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 178 oop obj = oopFactory::new_typeArray(type, size, CHECK); 179 thread->set_vm_result(obj); 180 IRT_END 181 182 183 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 184 // Note: no oopHandle for pool & klass needed since they are not used 185 // anymore after new_objArray() and no GC can happen before. 186 // (This may have to change if this code changes!) 187 Klass* klass = pool->klass_at(index, CHECK); 188 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 189 thread->set_vm_result(obj); 190 IRT_END 191 192 193 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 194 // We may want to pass in more arguments - could make this slightly faster 195 ConstantPool* constants = method(thread)->constants(); 196 int i = get_index_u2(thread, Bytecodes::_multianewarray); 197 Klass* klass = constants->klass_at(i, CHECK); 198 int nof_dims = number_of_dimensions(thread); 199 assert(klass->is_klass(), "not a class"); 200 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 201 202 // We must create an array of jints to pass to multi_allocate. 203 ResourceMark rm(thread); 204 const int small_dims = 10; 205 jint dim_array[small_dims]; 206 jint *dims = &dim_array[0]; 207 if (nof_dims > small_dims) { 208 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 209 } 210 for (int index = 0; index < nof_dims; index++) { 211 // offset from first_size_address is addressed as local[index] 212 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 213 dims[index] = first_size_address[n]; 214 } 215 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 216 thread->set_vm_result(obj); 217 IRT_END 218 219 220 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 221 assert(obj->is_oop(), "must be a valid oop"); 222 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 223 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 224 IRT_END 225 226 227 // Quicken instance-of and check-cast bytecodes 228 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 229 // Force resolving; quicken the bytecode 230 int which = get_index_u2(thread, Bytecodes::_checkcast); 231 ConstantPool* cpool = method(thread)->constants(); 232 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 233 // program we might have seen an unquick'd bytecode in the interpreter but have another 234 // thread quicken the bytecode before we get here. 235 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 236 Klass* klass = cpool->klass_at(which, CHECK); 237 thread->set_vm_result_2(klass); 238 IRT_END 239 240 241 //------------------------------------------------------------------------------------------------------------------------ 242 // Exceptions 243 244 // Assume the compiler is (or will be) interested in this event. 245 // If necessary, create an MDO to hold the information, and record it. 246 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 247 assert(ProfileTraps, "call me only if profiling"); 248 methodHandle trap_method(thread, method(thread)); 249 250 if (trap_method.not_null()) { 251 MethodData* trap_mdo = trap_method->method_data(); 252 if (trap_mdo == NULL) { 253 Method::build_interpreter_method_data(trap_method, THREAD); 254 if (HAS_PENDING_EXCEPTION) { 255 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 256 CLEAR_PENDING_EXCEPTION; 257 } 258 trap_mdo = trap_method->method_data(); 259 // and fall through... 260 } 261 if (trap_mdo != NULL) { 262 // Update per-method count of trap events. The interpreter 263 // is updating the MDO to simulate the effect of compiler traps. 264 int trap_bci = trap_method->bci_from(bcp(thread)); 265 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 266 } 267 } 268 } 269 270 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 271 // get klass 272 InstanceKlass* klass = InstanceKlass::cast(k); 273 assert(klass->is_initialized(), 274 "this klass should have been initialized during VM initialization"); 275 // create instance - do not call constructor since we may have no 276 // (java) stack space left (should assert constructor is empty) 277 Handle exception; 278 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 279 exception = Handle(THREAD, exception_oop); 280 if (StackTraceInThrowable) { 281 java_lang_Throwable::fill_in_stack_trace(exception); 282 } 283 return exception; 284 } 285 286 // Special handling for stack overflow: since we don't have any (java) stack 287 // space left we use the pre-allocated & pre-initialized StackOverflowError 288 // klass to create an stack overflow error instance. We do not call its 289 // constructor for the same reason (it is empty, anyway). 290 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 291 Handle exception = get_preinitialized_exception( 292 SystemDictionary::StackOverflowError_klass(), 293 CHECK); 294 THROW_HANDLE(exception); 295 IRT_END 296 297 298 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 299 // lookup exception klass 300 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 301 if (ProfileTraps) { 302 if (s == vmSymbols::java_lang_ArithmeticException()) { 303 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 304 } else if (s == vmSymbols::java_lang_NullPointerException()) { 305 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 306 } 307 } 308 // create exception 309 Handle exception = Exceptions::new_exception(thread, s, message); 310 thread->set_vm_result(exception()); 311 IRT_END 312 313 314 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 315 ResourceMark rm(thread); 316 const char* klass_name = obj->klass()->external_name(); 317 // lookup exception klass 318 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 319 if (ProfileTraps) { 320 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 321 } 322 // create exception, with klass name as detail message 323 Handle exception = Exceptions::new_exception(thread, s, klass_name); 324 thread->set_vm_result(exception()); 325 IRT_END 326 327 328 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 329 char message[jintAsStringSize]; 330 // lookup exception klass 331 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 332 if (ProfileTraps) { 333 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 334 } 335 // create exception 336 sprintf(message, "%d", index); 337 THROW_MSG(s, message); 338 IRT_END 339 340 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 341 JavaThread* thread, oopDesc* obj)) 342 343 ResourceMark rm(thread); 344 char* message = SharedRuntime::generate_class_cast_message( 345 thread, obj->klass()->external_name()); 346 347 if (ProfileTraps) { 348 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 349 } 350 351 // create exception 352 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 353 IRT_END 354 355 // exception_handler_for_exception(...) returns the continuation address, 356 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 357 // The exception oop is returned to make sure it is preserved over GC (it 358 // is only on the stack if the exception was thrown explicitly via athrow). 359 // During this operation, the expression stack contains the values for the 360 // bci where the exception happened. If the exception was propagated back 361 // from a call, the expression stack contains the values for the bci at the 362 // invoke w/o arguments (i.e., as if one were inside the call). 363 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 364 365 Handle h_exception(thread, exception); 366 methodHandle h_method (thread, method(thread)); 367 constantPoolHandle h_constants(thread, h_method->constants()); 368 bool should_repeat; 369 int handler_bci; 370 int current_bci = bci(thread); 371 372 // Need to do this check first since when _do_not_unlock_if_synchronized 373 // is set, we don't want to trigger any classloading which may make calls 374 // into java, or surprisingly find a matching exception handler for bci 0 375 // since at this moment the method hasn't been "officially" entered yet. 376 if (thread->do_not_unlock_if_synchronized()) { 377 ResourceMark rm; 378 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 379 thread->set_vm_result(exception); 380 #ifdef CC_INTERP 381 return (address) -1; 382 #else 383 return Interpreter::remove_activation_entry(); 384 #endif 385 } 386 387 do { 388 should_repeat = false; 389 390 // assertions 391 #ifdef ASSERT 392 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 393 assert(h_exception->is_oop(), "just checking"); 394 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 395 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 396 if (ExitVMOnVerifyError) vm_exit(-1); 397 ShouldNotReachHere(); 398 } 399 #endif 400 401 // tracing 402 if (TraceExceptions) { 403 ttyLocker ttyl; 404 ResourceMark rm(thread); 405 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 406 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 407 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 408 } 409 // Don't go paging in something which won't be used. 410 // else if (extable->length() == 0) { 411 // // disabled for now - interpreter is not using shortcut yet 412 // // (shortcut is not to call runtime if we have no exception handlers) 413 // // warning("performance bug: should not call runtime if method has no exception handlers"); 414 // } 415 // for AbortVMOnException flag 416 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 417 418 // exception handler lookup 419 KlassHandle h_klass(THREAD, h_exception->klass()); 420 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 421 if (HAS_PENDING_EXCEPTION) { 422 // We threw an exception while trying to find the exception handler. 423 // Transfer the new exception to the exception handle which will 424 // be set into thread local storage, and do another lookup for an 425 // exception handler for this exception, this time starting at the 426 // BCI of the exception handler which caused the exception to be 427 // thrown (bug 4307310). 428 h_exception = Handle(THREAD, PENDING_EXCEPTION); 429 CLEAR_PENDING_EXCEPTION; 430 if (handler_bci >= 0) { 431 current_bci = handler_bci; 432 should_repeat = true; 433 } 434 } 435 } while (should_repeat == true); 436 437 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 438 // time throw or a stack unwinding throw and accordingly notify the debugger 439 if (JvmtiExport::can_post_on_exceptions()) { 440 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 441 } 442 443 #ifdef CC_INTERP 444 address continuation = (address)(intptr_t) handler_bci; 445 #else 446 address continuation = NULL; 447 #endif 448 address handler_pc = NULL; 449 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 450 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 451 // handler in this method, or (b) after a stack overflow there is not yet 452 // enough stack space available to reprotect the stack. 453 #ifndef CC_INTERP 454 continuation = Interpreter::remove_activation_entry(); 455 #endif 456 // Count this for compilation purposes 457 h_method->interpreter_throwout_increment(THREAD); 458 } else { 459 // handler in this method => change bci/bcp to handler bci/bcp and continue there 460 handler_pc = h_method->code_base() + handler_bci; 461 #ifndef CC_INTERP 462 set_bcp_and_mdp(handler_pc, thread); 463 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 464 #endif 465 } 466 // notify debugger of an exception catch 467 // (this is good for exceptions caught in native methods as well) 468 if (JvmtiExport::can_post_on_exceptions()) { 469 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 470 } 471 472 thread->set_vm_result(h_exception()); 473 return continuation; 474 IRT_END 475 476 477 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 478 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 479 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 480 IRT_END 481 482 483 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 484 THROW(vmSymbols::java_lang_AbstractMethodError()); 485 IRT_END 486 487 488 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 489 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 490 IRT_END 491 492 493 //------------------------------------------------------------------------------------------------------------------------ 494 // Fields 495 // 496 497 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 498 // resolve field 499 FieldAccessInfo info; 500 constantPoolHandle pool(thread, method(thread)->constants()); 501 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); 502 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 503 504 { 505 JvmtiHideSingleStepping jhss(thread); 506 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), 507 bytecode, false, CHECK); 508 } // end JvmtiHideSingleStepping 509 510 // check if link resolution caused cpCache to be updated 511 if (already_resolved(thread)) return; 512 513 // compute auxiliary field attributes 514 TosState state = as_TosState(info.field_type()); 515 516 // We need to delay resolving put instructions on final fields 517 // until we actually invoke one. This is required so we throw 518 // exceptions at the correct place. If we do not resolve completely 519 // in the current pass, leaving the put_code set to zero will 520 // cause the next put instruction to reresolve. 521 Bytecodes::Code put_code = (Bytecodes::Code)0; 522 523 // We also need to delay resolving getstatic instructions until the 524 // class is intitialized. This is required so that access to the static 525 // field will call the initialization function every time until the class 526 // is completely initialized ala. in 2.17.5 in JVM Specification. 527 InstanceKlass *klass = InstanceKlass::cast(info.klass()()); 528 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 529 !klass->is_initialized()); 530 Bytecodes::Code get_code = (Bytecodes::Code)0; 531 532 if (!uninitialized_static) { 533 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 534 if (is_put || !info.access_flags().is_final()) { 535 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 536 } 537 } 538 539 cache_entry(thread)->set_field( 540 get_code, 541 put_code, 542 info.klass(), 543 info.field_index(), 544 info.field_offset(), 545 state, 546 info.access_flags().is_final(), 547 info.access_flags().is_volatile(), 548 pool->pool_holder() 549 ); 550 IRT_END 551 552 553 //------------------------------------------------------------------------------------------------------------------------ 554 // Synchronization 555 // 556 // The interpreter's synchronization code is factored out so that it can 557 // be shared by method invocation and synchronized blocks. 558 //%note synchronization_3 559 560 //%note monitor_1 561 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 562 #ifdef ASSERT 563 thread->last_frame().interpreter_frame_verify_monitor(elem); 564 #endif 565 if (PrintBiasedLockingStatistics) { 566 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 567 } 568 Handle h_obj(thread, elem->obj()); 569 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 570 "must be NULL or an object"); 571 if (UseBiasedLocking) { 572 // Retry fast entry if bias is revoked to avoid unnecessary inflation 573 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 574 } else { 575 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 576 } 577 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 578 "must be NULL or an object"); 579 #ifdef ASSERT 580 thread->last_frame().interpreter_frame_verify_monitor(elem); 581 #endif 582 IRT_END 583 584 585 //%note monitor_1 586 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 587 #ifdef ASSERT 588 thread->last_frame().interpreter_frame_verify_monitor(elem); 589 #endif 590 Handle h_obj(thread, elem->obj()); 591 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 592 "must be NULL or an object"); 593 if (elem == NULL || h_obj()->is_unlocked()) { 594 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 595 } 596 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 597 // Free entry. This must be done here, since a pending exception might be installed on 598 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 599 elem->set_obj(NULL); 600 #ifdef ASSERT 601 thread->last_frame().interpreter_frame_verify_monitor(elem); 602 #endif 603 IRT_END 604 605 606 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 607 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 608 IRT_END 609 610 611 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 612 // Returns an illegal exception to install into the current thread. The 613 // pending_exception flag is cleared so normal exception handling does not 614 // trigger. Any current installed exception will be overwritten. This 615 // method will be called during an exception unwind. 616 617 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 618 Handle exception(thread, thread->vm_result()); 619 assert(exception() != NULL, "vm result should be set"); 620 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 621 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 622 exception = get_preinitialized_exception( 623 SystemDictionary::IllegalMonitorStateException_klass(), 624 CATCH); 625 } 626 thread->set_vm_result(exception()); 627 IRT_END 628 629 630 //------------------------------------------------------------------------------------------------------------------------ 631 // Invokes 632 633 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 634 return method->orig_bytecode_at(method->bci_from(bcp)); 635 IRT_END 636 637 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 638 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 639 IRT_END 640 641 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 642 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 643 IRT_END 644 645 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { 646 // extract receiver from the outgoing argument list if necessary 647 Handle receiver(thread, NULL); 648 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 649 ResourceMark rm(thread); 650 methodHandle m (thread, method(thread)); 651 Bytecode_invoke call(m, bci(thread)); 652 Symbol* signature = call.signature(); 653 receiver = Handle(thread, 654 thread->last_frame().interpreter_callee_receiver(signature)); 655 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 656 "sanity check"); 657 assert(receiver.is_null() || 658 !Universe::heap()->is_in_reserved(receiver->klass()), 659 "sanity check"); 660 } 661 662 // resolve method 663 CallInfo info; 664 constantPoolHandle pool(thread, method(thread)->constants()); 665 666 { 667 JvmtiHideSingleStepping jhss(thread); 668 LinkResolver::resolve_invoke(info, receiver, pool, 669 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 670 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 671 int retry_count = 0; 672 while (info.resolved_method()->is_old()) { 673 // It is very unlikely that method is redefined more than 100 times 674 // in the middle of resolve. If it is looping here more than 100 times 675 // means then there could be a bug here. 676 guarantee((retry_count++ < 100), 677 "Could not resolve to latest version of redefined method"); 678 // method is redefined in the middle of resolve so re-try. 679 LinkResolver::resolve_invoke(info, receiver, pool, 680 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 681 } 682 } 683 } // end JvmtiHideSingleStepping 684 685 // check if link resolution caused cpCache to be updated 686 if (already_resolved(thread)) return; 687 688 if (bytecode == Bytecodes::_invokeinterface) { 689 690 if (TraceItables && Verbose) { 691 ResourceMark rm(thread); 692 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 693 } 694 if (info.resolved_method()->method_holder() == 695 SystemDictionary::Object_klass()) { 696 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 697 // (see also cpCacheOop.cpp for details) 698 methodHandle rm = info.resolved_method(); 699 assert(rm->is_final() || info.has_vtable_index(), 700 "should have been set already"); 701 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); 702 } else { 703 // Setup itable entry 704 int index = klassItable::compute_itable_index(info.resolved_method()()); 705 cache_entry(thread)->set_interface_call(info.resolved_method(), index); 706 } 707 } else { 708 cache_entry(thread)->set_method( 709 bytecode, 710 info.resolved_method(), 711 info.vtable_index()); 712 } 713 } 714 IRT_END 715 716 717 // First time execution: Resolve symbols, create a permanent MethodType object. 718 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { 719 assert(EnableInvokeDynamic, ""); 720 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 721 722 // resolve method 723 CallInfo info; 724 constantPoolHandle pool(thread, method(thread)->constants()); 725 726 { 727 JvmtiHideSingleStepping jhss(thread); 728 LinkResolver::resolve_invoke(info, Handle(), pool, 729 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 730 } // end JvmtiHideSingleStepping 731 732 cache_entry(thread)->set_method_handle(pool, info); 733 } 734 IRT_END 735 736 737 // First time execution: Resolve symbols, create a permanent CallSite object. 738 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 739 assert(EnableInvokeDynamic, ""); 740 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 741 742 //TO DO: consider passing BCI to Java. 743 // int caller_bci = method(thread)->bci_from(bcp(thread)); 744 745 // resolve method 746 CallInfo info; 747 constantPoolHandle pool(thread, method(thread)->constants()); 748 int index = get_index_u4(thread, bytecode); 749 { 750 JvmtiHideSingleStepping jhss(thread); 751 LinkResolver::resolve_invoke(info, Handle(), pool, 752 index, bytecode, CHECK); 753 } // end JvmtiHideSingleStepping 754 755 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 756 cp_cache_entry->set_dynamic_call(pool, info); 757 } 758 IRT_END 759 760 761 //------------------------------------------------------------------------------------------------------------------------ 762 // Miscellaneous 763 764 765 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 766 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 767 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 768 if (branch_bcp != NULL && nm != NULL) { 769 // This was a successful request for an OSR nmethod. Because 770 // frequency_counter_overflow_inner ends with a safepoint check, 771 // nm could have been unloaded so look it up again. It's unsafe 772 // to examine nm directly since it might have been freed and used 773 // for something else. 774 frame fr = thread->last_frame(); 775 Method* method = fr.interpreter_frame_method(); 776 int bci = method->bci_from(fr.interpreter_frame_bcp()); 777 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 778 } 779 #ifndef PRODUCT 780 if (TraceOnStackReplacement) { 781 if (nm != NULL) { 782 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 783 nm->print(); 784 } 785 } 786 #endif 787 return nm; 788 } 789 790 IRT_ENTRY(nmethod*, 791 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 792 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 793 // flag, in case this method triggers classloading which will call into Java. 794 UnlockFlagSaver fs(thread); 795 796 frame fr = thread->last_frame(); 797 assert(fr.is_interpreted_frame(), "must come from interpreter"); 798 methodHandle method(thread, fr.interpreter_frame_method()); 799 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 800 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 801 802 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 803 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 804 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 805 806 if (osr_nm != NULL) { 807 // We may need to do on-stack replacement which requires that no 808 // monitors in the activation are biased because their 809 // BasicObjectLocks will need to migrate during OSR. Force 810 // unbiasing of all monitors in the activation now (even though 811 // the OSR nmethod might be invalidated) because we don't have a 812 // safepoint opportunity later once the migration begins. 813 if (UseBiasedLocking) { 814 ResourceMark rm; 815 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 816 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 817 kptr < fr.interpreter_frame_monitor_begin(); 818 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 819 if( kptr->obj() != NULL ) { 820 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 821 } 822 } 823 BiasedLocking::revoke(objects_to_revoke); 824 } 825 } 826 return osr_nm; 827 IRT_END 828 829 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 830 assert(ProfileInterpreter, "must be profiling interpreter"); 831 int bci = method->bci_from(cur_bcp); 832 MethodData* mdo = method->method_data(); 833 if (mdo == NULL) return 0; 834 return mdo->bci_to_di(bci); 835 IRT_END 836 837 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 838 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 839 // flag, in case this method triggers classloading which will call into Java. 840 UnlockFlagSaver fs(thread); 841 842 assert(ProfileInterpreter, "must be profiling interpreter"); 843 frame fr = thread->last_frame(); 844 assert(fr.is_interpreted_frame(), "must come from interpreter"); 845 methodHandle method(thread, fr.interpreter_frame_method()); 846 Method::build_interpreter_method_data(method, THREAD); 847 if (HAS_PENDING_EXCEPTION) { 848 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 849 CLEAR_PENDING_EXCEPTION; 850 // and fall through... 851 } 852 IRT_END 853 854 855 #ifdef ASSERT 856 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 857 assert(ProfileInterpreter, "must be profiling interpreter"); 858 859 MethodData* mdo = method->method_data(); 860 assert(mdo != NULL, "must not be null"); 861 862 int bci = method->bci_from(bcp); 863 864 address mdp2 = mdo->bci_to_dp(bci); 865 if (mdp != mdp2) { 866 ResourceMark rm; 867 ResetNoHandleMark rnm; // In a LEAF entry. 868 HandleMark hm; 869 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 870 int current_di = mdo->dp_to_di(mdp); 871 int expected_di = mdo->dp_to_di(mdp2); 872 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 873 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 874 int approx_bci = -1; 875 if (current_di >= 0) { 876 approx_bci = mdo->data_at(current_di)->bci(); 877 } 878 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 879 mdo->print_on(tty); 880 method->print_codes(); 881 } 882 assert(mdp == mdp2, "wrong mdp"); 883 IRT_END 884 #endif // ASSERT 885 886 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 887 assert(ProfileInterpreter, "must be profiling interpreter"); 888 ResourceMark rm(thread); 889 HandleMark hm(thread); 890 frame fr = thread->last_frame(); 891 assert(fr.is_interpreted_frame(), "must come from interpreter"); 892 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 893 894 // Grab a lock to ensure atomic access to setting the return bci and 895 // the displacement. This can block and GC, invalidating all naked oops. 896 MutexLocker ml(RetData_lock); 897 898 // ProfileData is essentially a wrapper around a derived oop, so we 899 // need to take the lock before making any ProfileData structures. 900 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 901 RetData* rdata = data->as_RetData(); 902 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 903 fr.interpreter_frame_set_mdp(new_mdp); 904 IRT_END 905 906 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 907 MethodCounters* mcs = Method::build_method_counters(m, thread); 908 if (HAS_PENDING_EXCEPTION) { 909 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 910 CLEAR_PENDING_EXCEPTION; 911 } 912 return mcs; 913 IRT_END 914 915 916 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 917 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 918 // stack traversal automatically takes care of preserving arguments for invoke, so 919 // this is no longer needed. 920 921 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 922 // if this is called during a safepoint 923 924 if (JvmtiExport::should_post_single_step()) { 925 // We are called during regular safepoints and when the VM is 926 // single stepping. If any thread is marked for single stepping, 927 // then we may have JVMTI work to do. 928 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 929 } 930 IRT_END 931 932 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 933 ConstantPoolCacheEntry *cp_entry)) 934 935 // check the access_flags for the field in the klass 936 937 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 938 int index = cp_entry->field_index(); 939 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 940 941 switch(cp_entry->flag_state()) { 942 case btos: // fall through 943 case ctos: // fall through 944 case stos: // fall through 945 case itos: // fall through 946 case ftos: // fall through 947 case ltos: // fall through 948 case dtos: // fall through 949 case atos: break; 950 default: ShouldNotReachHere(); return; 951 } 952 bool is_static = (obj == NULL); 953 HandleMark hm(thread); 954 955 Handle h_obj; 956 if (!is_static) { 957 // non-static field accessors have an object, but we need a handle 958 h_obj = Handle(thread, obj); 959 } 960 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 961 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 962 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 963 IRT_END 964 965 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 966 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 967 968 Klass* k = (Klass*)cp_entry->f1_as_klass(); 969 970 // check the access_flags for the field in the klass 971 InstanceKlass* ik = InstanceKlass::cast(k); 972 int index = cp_entry->field_index(); 973 // bail out if field modifications are not watched 974 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 975 976 char sig_type = '\0'; 977 978 switch(cp_entry->flag_state()) { 979 case btos: sig_type = 'Z'; break; 980 case ctos: sig_type = 'C'; break; 981 case stos: sig_type = 'S'; break; 982 case itos: sig_type = 'I'; break; 983 case ftos: sig_type = 'F'; break; 984 case atos: sig_type = 'L'; break; 985 case ltos: sig_type = 'J'; break; 986 case dtos: sig_type = 'D'; break; 987 default: ShouldNotReachHere(); return; 988 } 989 bool is_static = (obj == NULL); 990 991 HandleMark hm(thread); 992 instanceKlassHandle h_klass(thread, k); 993 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 994 jvalue fvalue; 995 #ifdef _LP64 996 fvalue = *value; 997 #else 998 // Long/double values are stored unaligned and also noncontiguously with 999 // tagged stacks. We can't just do a simple assignment even in the non- 1000 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1001 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1002 // We assume that the two halves of longs/doubles are stored in interpreter 1003 // stack slots in platform-endian order. 1004 jlong_accessor u; 1005 jint* newval = (jint*)value; 1006 u.words[0] = newval[0]; 1007 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1008 fvalue.j = u.long_value; 1009 #endif // _LP64 1010 1011 Handle h_obj; 1012 if (!is_static) { 1013 // non-static field accessors have an object, but we need a handle 1014 h_obj = Handle(thread, obj); 1015 } 1016 1017 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1018 fid, sig_type, &fvalue); 1019 IRT_END 1020 1021 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1022 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1023 IRT_END 1024 1025 1026 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1027 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1028 IRT_END 1029 1030 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1031 { 1032 return (Interpreter::contains(pc) ? 1 : 0); 1033 } 1034 IRT_END 1035 1036 1037 // Implementation of SignatureHandlerLibrary 1038 1039 address SignatureHandlerLibrary::set_handler_blob() { 1040 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1041 if (handler_blob == NULL) { 1042 return NULL; 1043 } 1044 address handler = handler_blob->code_begin(); 1045 _handler_blob = handler_blob; 1046 _handler = handler; 1047 return handler; 1048 } 1049 1050 void SignatureHandlerLibrary::initialize() { 1051 if (_fingerprints != NULL) { 1052 return; 1053 } 1054 if (set_handler_blob() == NULL) { 1055 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1056 } 1057 1058 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1059 SignatureHandlerLibrary::buffer_size); 1060 _buffer = bb->code_begin(); 1061 1062 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1063 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1064 } 1065 1066 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1067 address handler = _handler; 1068 int insts_size = buffer->pure_insts_size(); 1069 if (handler + insts_size > _handler_blob->code_end()) { 1070 // get a new handler blob 1071 handler = set_handler_blob(); 1072 } 1073 if (handler != NULL) { 1074 memcpy(handler, buffer->insts_begin(), insts_size); 1075 pd_set_handler(handler); 1076 ICache::invalidate_range(handler, insts_size); 1077 _handler = handler + insts_size; 1078 } 1079 return handler; 1080 } 1081 1082 void SignatureHandlerLibrary::add(methodHandle method) { 1083 if (method->signature_handler() == NULL) { 1084 // use slow signature handler if we can't do better 1085 int handler_index = -1; 1086 // check if we can use customized (fast) signature handler 1087 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1088 // use customized signature handler 1089 MutexLocker mu(SignatureHandlerLibrary_lock); 1090 // make sure data structure is initialized 1091 initialize(); 1092 // lookup method signature's fingerprint 1093 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1094 handler_index = _fingerprints->find(fingerprint); 1095 // create handler if necessary 1096 if (handler_index < 0) { 1097 ResourceMark rm; 1098 ptrdiff_t align_offset = (address) 1099 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1100 CodeBuffer buffer((address)(_buffer + align_offset), 1101 SignatureHandlerLibrary::buffer_size - align_offset); 1102 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1103 // copy into code heap 1104 address handler = set_handler(&buffer); 1105 if (handler == NULL) { 1106 // use slow signature handler 1107 } else { 1108 // debugging suppport 1109 if (PrintSignatureHandlers) { 1110 tty->cr(); 1111 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1112 _handlers->length(), 1113 (method->is_static() ? "static" : "receiver"), 1114 method->name_and_sig_as_C_string(), 1115 fingerprint, 1116 buffer.insts_size()); 1117 Disassembler::decode(handler, handler + buffer.insts_size()); 1118 #ifndef PRODUCT 1119 tty->print_cr(" --- associated result handler ---"); 1120 address rh_begin = Interpreter::result_handler(method()->result_type()); 1121 address rh_end = rh_begin; 1122 while (*(int*)rh_end != 0) { 1123 rh_end += sizeof(int); 1124 } 1125 Disassembler::decode(rh_begin, rh_end); 1126 #endif 1127 } 1128 // add handler to library 1129 _fingerprints->append(fingerprint); 1130 _handlers->append(handler); 1131 // set handler index 1132 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1133 handler_index = _fingerprints->length() - 1; 1134 } 1135 } 1136 // Set handler under SignatureHandlerLibrary_lock 1137 if (handler_index < 0) { 1138 // use generic signature handler 1139 method->set_signature_handler(Interpreter::slow_signature_handler()); 1140 } else { 1141 // set handler 1142 method->set_signature_handler(_handlers->at(handler_index)); 1143 } 1144 } else { 1145 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1146 // use generic signature handler 1147 method->set_signature_handler(Interpreter::slow_signature_handler()); 1148 } 1149 } 1150 #ifdef ASSERT 1151 int handler_index = -1; 1152 int fingerprint_index = -2; 1153 { 1154 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1155 // in any way if accessed from multiple threads. To avoid races with another 1156 // thread which may change the arrays in the above, mutex protected block, we 1157 // have to protect this read access here with the same mutex as well! 1158 MutexLocker mu(SignatureHandlerLibrary_lock); 1159 if (_handlers != NULL) { 1160 handler_index = _handlers->find(method->signature_handler()); 1161 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1162 } 1163 } 1164 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1165 handler_index == fingerprint_index, "sanity check"); 1166 #endif // ASSERT 1167 } 1168 1169 1170 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1171 address SignatureHandlerLibrary::_handler = NULL; 1172 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1173 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1174 address SignatureHandlerLibrary::_buffer = NULL; 1175 1176 1177 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1178 methodHandle m(thread, method); 1179 assert(m->is_native(), "sanity check"); 1180 // lookup native function entry point if it doesn't exist 1181 bool in_base_library; 1182 if (!m->has_native_function()) { 1183 NativeLookup::lookup(m, in_base_library, CHECK); 1184 } 1185 // make sure signature handler is installed 1186 SignatureHandlerLibrary::add(m); 1187 // The interpreter entry point checks the signature handler first, 1188 // before trying to fetch the native entry point and klass mirror. 1189 // We must set the signature handler last, so that multiple processors 1190 // preparing the same method will be sure to see non-null entry & mirror. 1191 IRT_END 1192 1193 #if defined(IA32) || defined(AMD64) || defined(ARM) 1194 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1195 if (src_address == dest_address) { 1196 return; 1197 } 1198 ResetNoHandleMark rnm; // In a LEAF entry. 1199 HandleMark hm; 1200 ResourceMark rm; 1201 frame fr = thread->last_frame(); 1202 assert(fr.is_interpreted_frame(), ""); 1203 jint bci = fr.interpreter_frame_bci(); 1204 methodHandle mh(thread, fr.interpreter_frame_method()); 1205 Bytecode_invoke invoke(mh, bci); 1206 ArgumentSizeComputer asc(invoke.signature()); 1207 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1208 Copy::conjoint_jbytes(src_address, dest_address, 1209 size_of_arguments * Interpreter::stackElementSize); 1210 IRT_END 1211 #endif