interpreterRuntime.cpp revision 1499:e9ff18c4ace7
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 28class 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 46void 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 63IRT_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 } 84IRT_END 85 86 87//------------------------------------------------------------------------------------------------------------------------ 88// Allocation 89 90IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) 91 klassOop k_oop = pool->klass_at(index, CHECK); 92 instanceKlassHandle klass (THREAD, k_oop); 93 94 // Make sure we are not instantiating an abstract klass 95 klass->check_valid_for_instantiation(true, CHECK); 96 97 // Make sure klass is initialized 98 klass->initialize(CHECK); 99 100 // At this point the class may not be fully initialized 101 // because of recursive initialization. If it is fully 102 // initialized & has_finalized is not set, we rewrite 103 // it into its fast version (Note: no locking is needed 104 // here since this is an atomic byte write and can be 105 // done more than once). 106 // 107 // Note: In case of classes with has_finalized we don't 108 // rewrite since that saves us an extra check in 109 // the fast version which then would call the 110 // slow version anyway (and do a call back into 111 // Java). 112 // If we have a breakpoint, then we don't rewrite 113 // because the _breakpoint bytecode would be lost. 114 oop obj = klass->allocate_instance(CHECK); 115 thread->set_vm_result(obj); 116IRT_END 117 118 119IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 120 oop obj = oopFactory::new_typeArray(type, size, CHECK); 121 thread->set_vm_result(obj); 122IRT_END 123 124 125IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) 126 // Note: no oopHandle for pool & klass needed since they are not used 127 // anymore after new_objArray() and no GC can happen before. 128 // (This may have to change if this code changes!) 129 klassOop klass = pool->klass_at(index, CHECK); 130 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 131 thread->set_vm_result(obj); 132IRT_END 133 134 135IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 136 // We may want to pass in more arguments - could make this slightly faster 137 constantPoolOop constants = method(thread)->constants(); 138 int i = get_index_u2(thread, Bytecodes::_multianewarray); 139 klassOop klass = constants->klass_at(i, CHECK); 140 int nof_dims = number_of_dimensions(thread); 141 assert(oop(klass)->is_klass(), "not a class"); 142 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 143 144 // We must create an array of jints to pass to multi_allocate. 145 ResourceMark rm(thread); 146 const int small_dims = 10; 147 jint dim_array[small_dims]; 148 jint *dims = &dim_array[0]; 149 if (nof_dims > small_dims) { 150 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 151 } 152 for (int index = 0; index < nof_dims; index++) { 153 // offset from first_size_address is addressed as local[index] 154 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 155 dims[index] = first_size_address[n]; 156 } 157 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 158 thread->set_vm_result(obj); 159IRT_END 160 161 162IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 163 assert(obj->is_oop(), "must be a valid oop"); 164 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); 165 instanceKlass::register_finalizer(instanceOop(obj), CHECK); 166IRT_END 167 168 169// Quicken instance-of and check-cast bytecodes 170IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 171 // Force resolving; quicken the bytecode 172 int which = get_index_u2(thread, Bytecodes::_checkcast); 173 constantPoolOop cpool = method(thread)->constants(); 174 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 175 // program we might have seen an unquick'd bytecode in the interpreter but have another 176 // thread quicken the bytecode before we get here. 177 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 178 klassOop klass = cpool->klass_at(which, CHECK); 179 thread->set_vm_result(klass); 180IRT_END 181 182 183//------------------------------------------------------------------------------------------------------------------------ 184// Exceptions 185 186// Assume the compiler is (or will be) interested in this event. 187// If necessary, create an MDO to hold the information, and record it. 188void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 189 assert(ProfileTraps, "call me only if profiling"); 190 methodHandle trap_method(thread, method(thread)); 191 if (trap_method.not_null()) { 192 methodDataHandle trap_mdo(thread, trap_method->method_data()); 193 if (trap_mdo.is_null()) { 194 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); 195 if (HAS_PENDING_EXCEPTION) { 196 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 197 CLEAR_PENDING_EXCEPTION; 198 } 199 trap_mdo = methodDataHandle(thread, trap_method->method_data()); 200 // and fall through... 201 } 202 if (trap_mdo.not_null()) { 203 // Update per-method count of trap events. The interpreter 204 // is updating the MDO to simulate the effect of compiler traps. 205 int trap_bci = trap_method->bci_from(bcp(thread)); 206 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 207 } 208 } 209} 210 211static Handle get_preinitialized_exception(klassOop k, TRAPS) { 212 // get klass 213 instanceKlass* klass = instanceKlass::cast(k); 214 assert(klass->is_initialized(), 215 "this klass should have been initialized during VM initialization"); 216 // create instance - do not call constructor since we may have no 217 // (java) stack space left (should assert constructor is empty) 218 Handle exception; 219 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 220 exception = Handle(THREAD, exception_oop); 221 if (StackTraceInThrowable) { 222 java_lang_Throwable::fill_in_stack_trace(exception); 223 } 224 return exception; 225} 226 227// Special handling for stack overflow: since we don't have any (java) stack 228// space left we use the pre-allocated & pre-initialized StackOverflowError 229// klass to create an stack overflow error instance. We do not call its 230// constructor for the same reason (it is empty, anyway). 231IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 232 Handle exception = get_preinitialized_exception( 233 SystemDictionary::StackOverflowError_klass(), 234 CHECK); 235 THROW_HANDLE(exception); 236IRT_END 237 238 239IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 240 // lookup exception klass 241 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 242 if (ProfileTraps) { 243 if (s == vmSymbols::java_lang_ArithmeticException()) { 244 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 245 } else if (s == vmSymbols::java_lang_NullPointerException()) { 246 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 247 } 248 } 249 // create exception 250 Handle exception = Exceptions::new_exception(thread, s(), message); 251 thread->set_vm_result(exception()); 252IRT_END 253 254 255IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 256 ResourceMark rm(thread); 257 const char* klass_name = Klass::cast(obj->klass())->external_name(); 258 // lookup exception klass 259 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 260 if (ProfileTraps) { 261 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 262 } 263 // create exception, with klass name as detail message 264 Handle exception = Exceptions::new_exception(thread, s(), klass_name); 265 thread->set_vm_result(exception()); 266IRT_END 267 268 269IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 270 char message[jintAsStringSize]; 271 // lookup exception klass 272 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 273 if (ProfileTraps) { 274 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 275 } 276 // create exception 277 sprintf(message, "%d", index); 278 THROW_MSG(s(), message); 279IRT_END 280 281IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 282 JavaThread* thread, oopDesc* obj)) 283 284 ResourceMark rm(thread); 285 char* message = SharedRuntime::generate_class_cast_message( 286 thread, Klass::cast(obj->klass())->external_name()); 287 288 if (ProfileTraps) { 289 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 290 } 291 292 // create exception 293 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 294IRT_END 295 296// required can be either a MethodType, or a Class (for a single argument) 297// actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) 298IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, 299 oopDesc* required, 300 oopDesc* actual)) { 301 ResourceMark rm(thread); 302 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); 303 304 if (ProfileTraps) { 305 note_trap(thread, Deoptimization::Reason_constraint, CHECK); 306 } 307 308 // create exception 309 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); 310} 311IRT_END 312 313 314 315// exception_handler_for_exception(...) returns the continuation address, 316// the exception oop (via TLS) and sets the bci/bcp for the continuation. 317// The exception oop is returned to make sure it is preserved over GC (it 318// is only on the stack if the exception was thrown explicitly via athrow). 319// During this operation, the expression stack contains the values for the 320// bci where the exception happened. If the exception was propagated back 321// from a call, the expression stack contains the values for the bci at the 322// invoke w/o arguments (i.e., as if one were inside the call). 323IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 324 325 Handle h_exception(thread, exception); 326 methodHandle h_method (thread, method(thread)); 327 constantPoolHandle h_constants(thread, h_method->constants()); 328 typeArrayHandle h_extable (thread, h_method->exception_table()); 329 bool should_repeat; 330 int handler_bci; 331 int current_bci = bcp(thread) - h_method->code_base(); 332 333 // Need to do this check first since when _do_not_unlock_if_synchronized 334 // is set, we don't want to trigger any classloading which may make calls 335 // into java, or surprisingly find a matching exception handler for bci 0 336 // since at this moment the method hasn't been "officially" entered yet. 337 if (thread->do_not_unlock_if_synchronized()) { 338 ResourceMark rm; 339 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 340 thread->set_vm_result(exception); 341#ifdef CC_INTERP 342 return (address) -1; 343#else 344 return Interpreter::remove_activation_entry(); 345#endif 346 } 347 348 do { 349 should_repeat = false; 350 351 // assertions 352#ifdef ASSERT 353 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 354 assert(h_exception->is_oop(), "just checking"); 355 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 356 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 357 if (ExitVMOnVerifyError) vm_exit(-1); 358 ShouldNotReachHere(); 359 } 360#endif 361 362 // tracing 363 if (TraceExceptions) { 364 ttyLocker ttyl; 365 ResourceMark rm(thread); 366 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 367 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 368 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 369 } 370// Don't go paging in something which won't be used. 371// else if (h_extable->length() == 0) { 372// // disabled for now - interpreter is not using shortcut yet 373// // (shortcut is not to call runtime if we have no exception handlers) 374// // warning("performance bug: should not call runtime if method has no exception handlers"); 375// } 376 // for AbortVMOnException flag 377 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 378 379 // exception handler lookup 380 KlassHandle h_klass(THREAD, h_exception->klass()); 381 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); 382 if (HAS_PENDING_EXCEPTION) { 383 // We threw an exception while trying to find the exception handler. 384 // Transfer the new exception to the exception handle which will 385 // be set into thread local storage, and do another lookup for an 386 // exception handler for this exception, this time starting at the 387 // BCI of the exception handler which caused the exception to be 388 // thrown (bug 4307310). 389 h_exception = Handle(THREAD, PENDING_EXCEPTION); 390 CLEAR_PENDING_EXCEPTION; 391 if (handler_bci >= 0) { 392 current_bci = handler_bci; 393 should_repeat = true; 394 } 395 } 396 } while (should_repeat == true); 397 398 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 399 // time throw or a stack unwinding throw and accordingly notify the debugger 400 if (JvmtiExport::can_post_on_exceptions()) { 401 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 402 } 403 404#ifdef CC_INTERP 405 address continuation = (address)(intptr_t) handler_bci; 406#else 407 address continuation = NULL; 408#endif 409 address handler_pc = NULL; 410 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 411 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 412 // handler in this method, or (b) after a stack overflow there is not yet 413 // enough stack space available to reprotect the stack. 414#ifndef CC_INTERP 415 continuation = Interpreter::remove_activation_entry(); 416#endif 417 // Count this for compilation purposes 418 h_method->interpreter_throwout_increment(); 419 } else { 420 // handler in this method => change bci/bcp to handler bci/bcp and continue there 421 handler_pc = h_method->code_base() + handler_bci; 422#ifndef CC_INTERP 423 set_bcp_and_mdp(handler_pc, thread); 424 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 425#endif 426 } 427 // notify debugger of an exception catch 428 // (this is good for exceptions caught in native methods as well) 429 if (JvmtiExport::can_post_on_exceptions()) { 430 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 431 } 432 433 thread->set_vm_result(h_exception()); 434 return continuation; 435IRT_END 436 437 438IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 439 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 440 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 441IRT_END 442 443 444IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 445 THROW(vmSymbols::java_lang_AbstractMethodError()); 446IRT_END 447 448 449IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 450 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 451IRT_END 452 453 454//------------------------------------------------------------------------------------------------------------------------ 455// Fields 456// 457 458IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 459 // resolve field 460 FieldAccessInfo info; 461 constantPoolHandle pool(thread, method(thread)->constants()); 462 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 463 464 { 465 JvmtiHideSingleStepping jhss(thread); 466 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), 467 bytecode, false, CHECK); 468 } // end JvmtiHideSingleStepping 469 470 // check if link resolution caused cpCache to be updated 471 if (already_resolved(thread)) return; 472 473 // compute auxiliary field attributes 474 TosState state = as_TosState(info.field_type()); 475 476 // We need to delay resolving put instructions on final fields 477 // until we actually invoke one. This is required so we throw 478 // exceptions at the correct place. If we do not resolve completely 479 // in the current pass, leaving the put_code set to zero will 480 // cause the next put instruction to reresolve. 481 bool is_put = (bytecode == Bytecodes::_putfield || 482 bytecode == Bytecodes::_putstatic); 483 Bytecodes::Code put_code = (Bytecodes::Code)0; 484 485 // We also need to delay resolving getstatic instructions until the 486 // class is intitialized. This is required so that access to the static 487 // field will call the initialization function every time until the class 488 // is completely initialized ala. in 2.17.5 in JVM Specification. 489 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); 490 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 491 !klass->is_initialized()); 492 Bytecodes::Code get_code = (Bytecodes::Code)0; 493 494 495 if (!uninitialized_static) { 496 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 497 if (is_put || !info.access_flags().is_final()) { 498 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 499 } 500 } 501 502 cache_entry(thread)->set_field( 503 get_code, 504 put_code, 505 info.klass(), 506 info.field_index(), 507 info.field_offset(), 508 state, 509 info.access_flags().is_final(), 510 info.access_flags().is_volatile() 511 ); 512IRT_END 513 514 515//------------------------------------------------------------------------------------------------------------------------ 516// Synchronization 517// 518// The interpreter's synchronization code is factored out so that it can 519// be shared by method invocation and synchronized blocks. 520//%note synchronization_3 521 522static void trace_locking(Handle& h_locking_obj, bool is_locking) { 523 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); 524} 525 526 527//%note monitor_1 528IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 529#ifdef ASSERT 530 thread->last_frame().interpreter_frame_verify_monitor(elem); 531#endif 532 if (PrintBiasedLockingStatistics) { 533 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 534 } 535 Handle h_obj(thread, elem->obj()); 536 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 537 "must be NULL or an object"); 538 if (UseBiasedLocking) { 539 // Retry fast entry if bias is revoked to avoid unnecessary inflation 540 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 541 } else { 542 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 543 } 544 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 545 "must be NULL or an object"); 546#ifdef ASSERT 547 thread->last_frame().interpreter_frame_verify_monitor(elem); 548#endif 549IRT_END 550 551 552//%note monitor_1 553IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 554#ifdef ASSERT 555 thread->last_frame().interpreter_frame_verify_monitor(elem); 556#endif 557 Handle h_obj(thread, elem->obj()); 558 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 559 "must be NULL or an object"); 560 if (elem == NULL || h_obj()->is_unlocked()) { 561 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 562 } 563 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 564 // Free entry. This must be done here, since a pending exception might be installed on 565 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 566 elem->set_obj(NULL); 567#ifdef ASSERT 568 thread->last_frame().interpreter_frame_verify_monitor(elem); 569#endif 570IRT_END 571 572 573IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 574 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 575IRT_END 576 577 578IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 579 // Returns an illegal exception to install into the current thread. The 580 // pending_exception flag is cleared so normal exception handling does not 581 // trigger. Any current installed exception will be overwritten. This 582 // method will be called during an exception unwind. 583 584 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 585 Handle exception(thread, thread->vm_result()); 586 assert(exception() != NULL, "vm result should be set"); 587 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 588 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 589 exception = get_preinitialized_exception( 590 SystemDictionary::IllegalMonitorStateException_klass(), 591 CATCH); 592 } 593 thread->set_vm_result(exception()); 594IRT_END 595 596 597//------------------------------------------------------------------------------------------------------------------------ 598// Invokes 599 600IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) 601 return method->orig_bytecode_at(method->bci_from(bcp)); 602IRT_END 603 604IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) 605 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 606IRT_END 607 608IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) 609 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 610IRT_END 611 612IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) 613 // extract receiver from the outgoing argument list if necessary 614 Handle receiver(thread, NULL); 615 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 616 ResourceMark rm(thread); 617 methodHandle m (thread, method(thread)); 618 int bci = m->bci_from(bcp(thread)); 619 Bytecode_invoke* call = Bytecode_invoke_at(m, bci); 620 symbolHandle signature (thread, call->signature()); 621 receiver = Handle(thread, 622 thread->last_frame().interpreter_callee_receiver(signature)); 623 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 624 "sanity check"); 625 assert(receiver.is_null() || 626 Universe::heap()->is_in_reserved(receiver->klass()), 627 "sanity check"); 628 } 629 630 // resolve method 631 CallInfo info; 632 constantPoolHandle pool(thread, method(thread)->constants()); 633 634 { 635 JvmtiHideSingleStepping jhss(thread); 636 LinkResolver::resolve_invoke(info, receiver, pool, 637 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 638 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 639 int retry_count = 0; 640 while (info.resolved_method()->is_old()) { 641 // It is very unlikely that method is redefined more than 100 times 642 // in the middle of resolve. If it is looping here more than 100 times 643 // means then there could be a bug here. 644 guarantee((retry_count++ < 100), 645 "Could not resolve to latest version of redefined method"); 646 // method is redefined in the middle of resolve so re-try. 647 LinkResolver::resolve_invoke(info, receiver, pool, 648 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 649 } 650 } 651 } // end JvmtiHideSingleStepping 652 653 // check if link resolution caused cpCache to be updated 654 if (already_resolved(thread)) return; 655 656 if (bytecode == Bytecodes::_invokeinterface) { 657 658 if (TraceItables && Verbose) { 659 ResourceMark rm(thread); 660 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 661 } 662 if (info.resolved_method()->method_holder() == 663 SystemDictionary::Object_klass()) { 664 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 665 // (see also cpCacheOop.cpp for details) 666 methodHandle rm = info.resolved_method(); 667 assert(rm->is_final() || info.has_vtable_index(), 668 "should have been set already"); 669 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); 670 } else { 671 // Setup itable entry 672 int index = klassItable::compute_itable_index(info.resolved_method()()); 673 cache_entry(thread)->set_interface_call(info.resolved_method(), index); 674 } 675 } else { 676 cache_entry(thread)->set_method( 677 bytecode, 678 info.resolved_method(), 679 info.vtable_index()); 680 } 681IRT_END 682 683 684// First time execution: Resolve symbols, create a permanent CallSite object. 685IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 686 ResourceMark rm(thread); 687 688 assert(EnableInvokeDynamic, ""); 689 690 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 691 692 methodHandle caller_method(thread, method(thread)); 693 694 // first find the bootstrap method 695 KlassHandle caller_klass(thread, caller_method->method_holder()); 696 Handle bootm = SystemDictionary::find_bootstrap_method(caller_klass, CHECK); 697 698 constantPoolHandle pool(thread, caller_method->constants()); 699 pool->set_invokedynamic(); // mark header to flag active call sites 700 701 int caller_bci = 0; 702 int site_index = 0; 703 { address caller_bcp = bcp(thread); 704 caller_bci = caller_method->bci_from(caller_bcp); 705 site_index = Bytes::get_native_u4(caller_bcp+1); 706 } 707 assert(site_index == InterpreterRuntime::bytecode(thread)->get_index_u4(bytecode), ""); 708 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); 709 // there is a second CPC entries that is of interest; it caches signature info: 710 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); 711 712 // first resolve the signature to a MH.invoke methodOop 713 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { 714 JvmtiHideSingleStepping jhss(thread); 715 CallInfo info; 716 LinkResolver::resolve_invoke(info, Handle(), pool, 717 site_index, bytecode, CHECK); 718 // The main entry corresponds to a JVM_CONSTANT_NameAndType, and serves 719 // as a common reference point for all invokedynamic call sites with 720 // that exact call descriptor. We will link it in the CP cache exactly 721 // as if it were an invokevirtual of MethodHandle.invoke. 722 pool->cache()->entry_at(main_index)->set_method( 723 bytecode, 724 info.resolved_method(), 725 info.vtable_index()); 726 assert(pool->cache()->entry_at(main_index)->is_vfinal(), "f2 must be a methodOop"); 727 } 728 729 // The method (f2 entry) of the main entry is the MH.invoke for the 730 // invokedynamic target call signature. 731 intptr_t f2_value = pool->cache()->entry_at(main_index)->f2(); 732 methodHandle signature_invoker(THREAD, (methodOop) f2_value); 733 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), 734 "correct result from LinkResolver::resolve_invokedynamic"); 735 736 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index)); 737 738 Handle info; // NYI: Other metadata from a new kind of CP entry. (Annotations?) 739 740 // this is the index which gets stored on the CallSite object (as "callerPosition"): 741 int call_site_position = constantPoolCacheOopDesc::decode_secondary_index(site_index); 742 743 Handle call_site 744 = SystemDictionary::make_dynamic_call_site(bootm, 745 // Callee information: 746 call_site_name, 747 signature_invoker, 748 info, 749 // Caller information: 750 caller_method, 751 caller_bci, 752 CHECK); 753 754 // In the secondary entry, the f1 field is the call site, and the f2 (index) 755 // field is some data about the invoke site. Currently, it is just the BCI. 756 // Later, it might be changed to help manage inlining dependencies. 757 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); 758} 759IRT_END 760 761 762//------------------------------------------------------------------------------------------------------------------------ 763// Miscellaneous 764 765 766#ifndef PRODUCT 767static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) { 768 if (TraceInvocationCounterOverflow) { 769 InvocationCounter* ic = m->invocation_counter(); 770 InvocationCounter* bc = m->backedge_counter(); 771 ResourceMark rm; 772 const char* msg = 773 branch_bcp == NULL 774 ? "comp-policy cntr ovfl @ %d in entry of " 775 : "comp-policy cntr ovfl @ %d in loop of "; 776 tty->print(msg, bci); 777 m->print_value(); 778 tty->cr(); 779 ic->print(); 780 bc->print(); 781 if (ProfileInterpreter) { 782 if (branch_bcp != NULL) { 783 methodDataOop mdo = m->method_data(); 784 if (mdo != NULL) { 785 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); 786 tty->print_cr("back branch count = %d", count); 787 } 788 } 789 } 790 } 791} 792 793static void trace_osr_request(methodHandle method, nmethod* osr, int bci) { 794 if (TraceOnStackReplacement) { 795 ResourceMark rm; 796 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); 797 method->print_short_name(tty); 798 tty->print_cr(" at bci %d", bci); 799 } 800} 801#endif // !PRODUCT 802 803nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 804 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 805 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 806 if (branch_bcp != NULL && nm != NULL) { 807 // This was a successful request for an OSR nmethod. Because 808 // frequency_counter_overflow_inner ends with a safepoint check, 809 // nm could have been unloaded so look it up again. It's unsafe 810 // to examine nm directly since it might have been freed and used 811 // for something else. 812 frame fr = thread->last_frame(); 813 methodOop method = fr.interpreter_frame_method(); 814 int bci = method->bci_from(fr.interpreter_frame_bcp()); 815 nm = method->lookup_osr_nmethod_for(bci); 816 } 817 return nm; 818} 819 820IRT_ENTRY(nmethod*, 821 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 822 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 823 // flag, in case this method triggers classloading which will call into Java. 824 UnlockFlagSaver fs(thread); 825 826 frame fr = thread->last_frame(); 827 assert(fr.is_interpreted_frame(), "must come from interpreter"); 828 methodHandle method(thread, fr.interpreter_frame_method()); 829 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0; 830 const int bci = method->bci_from(fr.interpreter_frame_bcp()); 831 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);) 832 833 if (JvmtiExport::can_post_interpreter_events()) { 834 if (thread->is_interp_only_mode()) { 835 // If certain JVMTI events (e.g. frame pop event) are requested then the 836 // thread is forced to remain in interpreted code. This is 837 // implemented partly by a check in the run_compiled_code 838 // section of the interpreter whether we should skip running 839 // compiled code, and partly by skipping OSR compiles for 840 // interpreted-only threads. 841 if (branch_bcp != NULL) { 842 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); 843 return NULL; 844 } 845 } 846 } 847 848 if (branch_bcp == NULL) { 849 // when code cache is full, compilation gets switched off, UseCompiler 850 // is set to false 851 if (!method->has_compiled_code() && UseCompiler) { 852 CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL); 853 } else { 854 // Force counter overflow on method entry, even if no compilation 855 // happened. (The method_invocation_event call does this also.) 856 CompilationPolicy::policy()->reset_counter_for_invocation_event(method); 857 } 858 // compilation at an invocation overflow no longer goes and retries test for 859 // compiled method. We always run the loser of the race as interpreted. 860 // so return NULL 861 return NULL; 862 } else { 863 // counter overflow in a loop => try to do on-stack-replacement 864 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci); 865 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);) 866 // when code cache is full, we should not compile any more... 867 if (osr_nm == NULL && UseCompiler) { 868 const int branch_bci = method->bci_from(branch_bcp); 869 CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL); 870 osr_nm = method->lookup_osr_nmethod_for(bci); 871 } 872 if (osr_nm == NULL) { 873 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); 874 return NULL; 875 } else { 876 // We may need to do on-stack replacement which requires that no 877 // monitors in the activation are biased because their 878 // BasicObjectLocks will need to migrate during OSR. Force 879 // unbiasing of all monitors in the activation now (even though 880 // the OSR nmethod might be invalidated) because we don't have a 881 // safepoint opportunity later once the migration begins. 882 if (UseBiasedLocking) { 883 ResourceMark rm; 884 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 885 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 886 kptr < fr.interpreter_frame_monitor_begin(); 887 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 888 if( kptr->obj() != NULL ) { 889 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 890 } 891 } 892 BiasedLocking::revoke(objects_to_revoke); 893 } 894 return osr_nm; 895 } 896 } 897IRT_END 898 899IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) 900 assert(ProfileInterpreter, "must be profiling interpreter"); 901 int bci = method->bci_from(cur_bcp); 902 methodDataOop mdo = method->method_data(); 903 if (mdo == NULL) return 0; 904 return mdo->bci_to_di(bci); 905IRT_END 906 907IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) 908 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 909 // flag, in case this method triggers classloading which will call into Java. 910 UnlockFlagSaver fs(thread); 911 912 assert(ProfileInterpreter, "must be profiling interpreter"); 913 frame fr = thread->last_frame(); 914 assert(fr.is_interpreted_frame(), "must come from interpreter"); 915 methodHandle method(thread, fr.interpreter_frame_method()); 916 int bci = method->bci_from(cur_bcp); 917 methodOopDesc::build_interpreter_method_data(method, THREAD); 918 if (HAS_PENDING_EXCEPTION) { 919 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 920 CLEAR_PENDING_EXCEPTION; 921 // and fall through... 922 } 923 methodDataOop mdo = method->method_data(); 924 if (mdo == NULL) return 0; 925 return mdo->bci_to_di(bci); 926IRT_END 927 928 929#ifdef ASSERT 930IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) 931 assert(ProfileInterpreter, "must be profiling interpreter"); 932 933 methodDataOop mdo = method->method_data(); 934 assert(mdo != NULL, "must not be null"); 935 936 int bci = method->bci_from(bcp); 937 938 address mdp2 = mdo->bci_to_dp(bci); 939 if (mdp != mdp2) { 940 ResourceMark rm; 941 ResetNoHandleMark rnm; // In a LEAF entry. 942 HandleMark hm; 943 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 944 int current_di = mdo->dp_to_di(mdp); 945 int expected_di = mdo->dp_to_di(mdp2); 946 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 947 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 948 int approx_bci = -1; 949 if (current_di >= 0) { 950 approx_bci = mdo->data_at(current_di)->bci(); 951 } 952 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 953 mdo->print_on(tty); 954 method->print_codes(); 955 } 956 assert(mdp == mdp2, "wrong mdp"); 957IRT_END 958#endif // ASSERT 959 960IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 961 assert(ProfileInterpreter, "must be profiling interpreter"); 962 ResourceMark rm(thread); 963 HandleMark hm(thread); 964 frame fr = thread->last_frame(); 965 assert(fr.is_interpreted_frame(), "must come from interpreter"); 966 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); 967 968 // Grab a lock to ensure atomic access to setting the return bci and 969 // the displacement. This can block and GC, invalidating all naked oops. 970 MutexLocker ml(RetData_lock); 971 972 // ProfileData is essentially a wrapper around a derived oop, so we 973 // need to take the lock before making any ProfileData structures. 974 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 975 RetData* rdata = data->as_RetData(); 976 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 977 fr.interpreter_frame_set_mdp(new_mdp); 978IRT_END 979 980 981IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 982 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 983 // stack traversal automatically takes care of preserving arguments for invoke, so 984 // this is no longer needed. 985 986 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 987 // if this is called during a safepoint 988 989 if (JvmtiExport::should_post_single_step()) { 990 // We are called during regular safepoints and when the VM is 991 // single stepping. If any thread is marked for single stepping, 992 // then we may have JVMTI work to do. 993 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 994 } 995IRT_END 996 997IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 998ConstantPoolCacheEntry *cp_entry)) 999 1000 // check the access_flags for the field in the klass 1001 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); 1002 typeArrayOop fields = ik->fields(); 1003 int index = cp_entry->field_index(); 1004 assert(index < fields->length(), "holders field index is out of range"); 1005 // bail out if field accesses are not watched 1006 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1007 1008 switch(cp_entry->flag_state()) { 1009 case btos: // fall through 1010 case ctos: // fall through 1011 case stos: // fall through 1012 case itos: // fall through 1013 case ftos: // fall through 1014 case ltos: // fall through 1015 case dtos: // fall through 1016 case atos: break; 1017 default: ShouldNotReachHere(); return; 1018 } 1019 bool is_static = (obj == NULL); 1020 HandleMark hm(thread); 1021 1022 Handle h_obj; 1023 if (!is_static) { 1024 // non-static field accessors have an object, but we need a handle 1025 h_obj = Handle(thread, obj); 1026 } 1027 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); 1028 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); 1029 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1030IRT_END 1031 1032IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1033 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1034 1035 klassOop k = (klassOop)cp_entry->f1(); 1036 1037 // check the access_flags for the field in the klass 1038 instanceKlass* ik = instanceKlass::cast(k); 1039 typeArrayOop fields = ik->fields(); 1040 int index = cp_entry->field_index(); 1041 assert(index < fields->length(), "holders field index is out of range"); 1042 // bail out if field modifications are not watched 1043 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1044 1045 char sig_type = '\0'; 1046 1047 switch(cp_entry->flag_state()) { 1048 case btos: sig_type = 'Z'; break; 1049 case ctos: sig_type = 'C'; break; 1050 case stos: sig_type = 'S'; break; 1051 case itos: sig_type = 'I'; break; 1052 case ftos: sig_type = 'F'; break; 1053 case atos: sig_type = 'L'; break; 1054 case ltos: sig_type = 'J'; break; 1055 case dtos: sig_type = 'D'; break; 1056 default: ShouldNotReachHere(); return; 1057 } 1058 bool is_static = (obj == NULL); 1059 1060 HandleMark hm(thread); 1061 instanceKlassHandle h_klass(thread, k); 1062 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); 1063 jvalue fvalue; 1064#ifdef _LP64 1065 fvalue = *value; 1066#else 1067 // Long/double values are stored unaligned and also noncontiguously with 1068 // tagged stacks. We can't just do a simple assignment even in the non- 1069 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1070 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1071 // We assume that the two halves of longs/doubles are stored in interpreter 1072 // stack slots in platform-endian order. 1073 jlong_accessor u; 1074 jint* newval = (jint*)value; 1075 u.words[0] = newval[0]; 1076 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1077 fvalue.j = u.long_value; 1078#endif // _LP64 1079 1080 Handle h_obj; 1081 if (!is_static) { 1082 // non-static field accessors have an object, but we need a handle 1083 h_obj = Handle(thread, obj); 1084 } 1085 1086 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1087 fid, sig_type, &fvalue); 1088IRT_END 1089 1090IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1091 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1092IRT_END 1093 1094 1095IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1096 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1097IRT_END 1098 1099IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1100{ 1101 return (Interpreter::contains(pc) ? 1 : 0); 1102} 1103IRT_END 1104 1105 1106// Implementation of SignatureHandlerLibrary 1107 1108address SignatureHandlerLibrary::set_handler_blob() { 1109 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1110 if (handler_blob == NULL) { 1111 return NULL; 1112 } 1113 address handler = handler_blob->instructions_begin(); 1114 _handler_blob = handler_blob; 1115 _handler = handler; 1116 return handler; 1117} 1118 1119void SignatureHandlerLibrary::initialize() { 1120 if (_fingerprints != NULL) { 1121 return; 1122 } 1123 if (set_handler_blob() == NULL) { 1124 vm_exit_out_of_memory(blob_size, "native signature handlers"); 1125 } 1126 1127 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1128 SignatureHandlerLibrary::buffer_size); 1129 _buffer = bb->instructions_begin(); 1130 1131 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); 1132 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); 1133} 1134 1135address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1136 address handler = _handler; 1137 int code_size = buffer->pure_code_size(); 1138 if (handler + code_size > _handler_blob->instructions_end()) { 1139 // get a new handler blob 1140 handler = set_handler_blob(); 1141 } 1142 if (handler != NULL) { 1143 memcpy(handler, buffer->code_begin(), code_size); 1144 pd_set_handler(handler); 1145 ICache::invalidate_range(handler, code_size); 1146 _handler = handler + code_size; 1147 } 1148 return handler; 1149} 1150 1151void SignatureHandlerLibrary::add(methodHandle method) { 1152 if (method->signature_handler() == NULL) { 1153 // use slow signature handler if we can't do better 1154 int handler_index = -1; 1155 // check if we can use customized (fast) signature handler 1156 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1157 // use customized signature handler 1158 MutexLocker mu(SignatureHandlerLibrary_lock); 1159 // make sure data structure is initialized 1160 initialize(); 1161 // lookup method signature's fingerprint 1162 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1163 handler_index = _fingerprints->find(fingerprint); 1164 // create handler if necessary 1165 if (handler_index < 0) { 1166 ResourceMark rm; 1167 ptrdiff_t align_offset = (address) 1168 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1169 CodeBuffer buffer((address)(_buffer + align_offset), 1170 SignatureHandlerLibrary::buffer_size - align_offset); 1171 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1172 // copy into code heap 1173 address handler = set_handler(&buffer); 1174 if (handler == NULL) { 1175 // use slow signature handler 1176 } else { 1177 // debugging suppport 1178 if (PrintSignatureHandlers) { 1179 tty->cr(); 1180 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1181 _handlers->length(), 1182 (method->is_static() ? "static" : "receiver"), 1183 method->name_and_sig_as_C_string(), 1184 fingerprint, 1185 buffer.code_size()); 1186 Disassembler::decode(handler, handler + buffer.code_size()); 1187#ifndef PRODUCT 1188 tty->print_cr(" --- associated result handler ---"); 1189 address rh_begin = Interpreter::result_handler(method()->result_type()); 1190 address rh_end = rh_begin; 1191 while (*(int*)rh_end != 0) { 1192 rh_end += sizeof(int); 1193 } 1194 Disassembler::decode(rh_begin, rh_end); 1195#endif 1196 } 1197 // add handler to library 1198 _fingerprints->append(fingerprint); 1199 _handlers->append(handler); 1200 // set handler index 1201 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1202 handler_index = _fingerprints->length() - 1; 1203 } 1204 } 1205 } else { 1206 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1207 } 1208 if (handler_index < 0) { 1209 // use generic signature handler 1210 method->set_signature_handler(Interpreter::slow_signature_handler()); 1211 } else { 1212 // set handler 1213 method->set_signature_handler(_handlers->at(handler_index)); 1214 } 1215 } 1216 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1217 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), 1218 "sanity check"); 1219} 1220 1221 1222BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1223address SignatureHandlerLibrary::_handler = NULL; 1224GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1225GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1226address SignatureHandlerLibrary::_buffer = NULL; 1227 1228 1229IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) 1230 methodHandle m(thread, method); 1231 assert(m->is_native(), "sanity check"); 1232 // lookup native function entry point if it doesn't exist 1233 bool in_base_library; 1234 if (!m->has_native_function()) { 1235 NativeLookup::lookup(m, in_base_library, CHECK); 1236 } 1237 // make sure signature handler is installed 1238 SignatureHandlerLibrary::add(m); 1239 // The interpreter entry point checks the signature handler first, 1240 // before trying to fetch the native entry point and klass mirror. 1241 // We must set the signature handler last, so that multiple processors 1242 // preparing the same method will be sure to see non-null entry & mirror. 1243IRT_END 1244 1245#if defined(IA32) || defined(AMD64) 1246IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1247 if (src_address == dest_address) { 1248 return; 1249 } 1250 ResetNoHandleMark rnm; // In a LEAF entry. 1251 HandleMark hm; 1252 ResourceMark rm; 1253 frame fr = thread->last_frame(); 1254 assert(fr.is_interpreted_frame(), ""); 1255 jint bci = fr.interpreter_frame_bci(); 1256 methodHandle mh(thread, fr.interpreter_frame_method()); 1257 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); 1258 ArgumentSizeComputer asc(invoke->signature()); 1259 int size_of_arguments = (asc.size() + (invoke->has_receiver() ? 1 : 0)); // receiver 1260 Copy::conjoint_bytes(src_address, dest_address, 1261 size_of_arguments * Interpreter::stackElementSize); 1262IRT_END 1263#endif 1264