interpreterRuntime.cpp revision 1668:3e8fbc61cee8
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 86IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 87 assert(bytecode == Bytecodes::_fast_aldc || 88 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 89 ResourceMark rm(thread); 90 methodHandle m (thread, method(thread)); 91 Bytecode_loadconstant* ldc = Bytecode_loadconstant_at(m, bci(thread)); 92 oop result = ldc->resolve_constant(THREAD); 93 DEBUG_ONLY(ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc->cache_index())); 94 assert(result == cpce->f1(), "expected result for assembly code"); 95} 96IRT_END 97 98 99//------------------------------------------------------------------------------------------------------------------------ 100// Allocation 101 102IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) 103 klassOop k_oop = pool->klass_at(index, CHECK); 104 instanceKlassHandle klass (THREAD, k_oop); 105 106 // Make sure we are not instantiating an abstract klass 107 klass->check_valid_for_instantiation(true, CHECK); 108 109 // Make sure klass is initialized 110 klass->initialize(CHECK); 111 112 // At this point the class may not be fully initialized 113 // because of recursive initialization. If it is fully 114 // initialized & has_finalized is not set, we rewrite 115 // it into its fast version (Note: no locking is needed 116 // here since this is an atomic byte write and can be 117 // done more than once). 118 // 119 // Note: In case of classes with has_finalized we don't 120 // rewrite since that saves us an extra check in 121 // the fast version which then would call the 122 // slow version anyway (and do a call back into 123 // Java). 124 // If we have a breakpoint, then we don't rewrite 125 // because the _breakpoint bytecode would be lost. 126 oop obj = klass->allocate_instance(CHECK); 127 thread->set_vm_result(obj); 128IRT_END 129 130 131IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 132 oop obj = oopFactory::new_typeArray(type, size, CHECK); 133 thread->set_vm_result(obj); 134IRT_END 135 136 137IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) 138 // Note: no oopHandle for pool & klass needed since they are not used 139 // anymore after new_objArray() and no GC can happen before. 140 // (This may have to change if this code changes!) 141 klassOop klass = pool->klass_at(index, CHECK); 142 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 143 thread->set_vm_result(obj); 144IRT_END 145 146 147IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 148 // We may want to pass in more arguments - could make this slightly faster 149 constantPoolOop constants = method(thread)->constants(); 150 int i = get_index_u2(thread, Bytecodes::_multianewarray); 151 klassOop klass = constants->klass_at(i, CHECK); 152 int nof_dims = number_of_dimensions(thread); 153 assert(oop(klass)->is_klass(), "not a class"); 154 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 155 156 // We must create an array of jints to pass to multi_allocate. 157 ResourceMark rm(thread); 158 const int small_dims = 10; 159 jint dim_array[small_dims]; 160 jint *dims = &dim_array[0]; 161 if (nof_dims > small_dims) { 162 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 163 } 164 for (int index = 0; index < nof_dims; index++) { 165 // offset from first_size_address is addressed as local[index] 166 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 167 dims[index] = first_size_address[n]; 168 } 169 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 170 thread->set_vm_result(obj); 171IRT_END 172 173 174IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 175 assert(obj->is_oop(), "must be a valid oop"); 176 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); 177 instanceKlass::register_finalizer(instanceOop(obj), CHECK); 178IRT_END 179 180 181// Quicken instance-of and check-cast bytecodes 182IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 183 // Force resolving; quicken the bytecode 184 int which = get_index_u2(thread, Bytecodes::_checkcast); 185 constantPoolOop cpool = method(thread)->constants(); 186 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 187 // program we might have seen an unquick'd bytecode in the interpreter but have another 188 // thread quicken the bytecode before we get here. 189 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 190 klassOop klass = cpool->klass_at(which, CHECK); 191 thread->set_vm_result(klass); 192IRT_END 193 194 195//------------------------------------------------------------------------------------------------------------------------ 196// Exceptions 197 198// Assume the compiler is (or will be) interested in this event. 199// If necessary, create an MDO to hold the information, and record it. 200void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 201 assert(ProfileTraps, "call me only if profiling"); 202 methodHandle trap_method(thread, method(thread)); 203 if (trap_method.not_null()) { 204 methodDataHandle trap_mdo(thread, trap_method->method_data()); 205 if (trap_mdo.is_null()) { 206 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); 207 if (HAS_PENDING_EXCEPTION) { 208 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 209 CLEAR_PENDING_EXCEPTION; 210 } 211 trap_mdo = methodDataHandle(thread, trap_method->method_data()); 212 // and fall through... 213 } 214 if (trap_mdo.not_null()) { 215 // Update per-method count of trap events. The interpreter 216 // is updating the MDO to simulate the effect of compiler traps. 217 int trap_bci = trap_method->bci_from(bcp(thread)); 218 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 219 } 220 } 221} 222 223static Handle get_preinitialized_exception(klassOop k, TRAPS) { 224 // get klass 225 instanceKlass* klass = instanceKlass::cast(k); 226 assert(klass->is_initialized(), 227 "this klass should have been initialized during VM initialization"); 228 // create instance - do not call constructor since we may have no 229 // (java) stack space left (should assert constructor is empty) 230 Handle exception; 231 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 232 exception = Handle(THREAD, exception_oop); 233 if (StackTraceInThrowable) { 234 java_lang_Throwable::fill_in_stack_trace(exception); 235 } 236 return exception; 237} 238 239// Special handling for stack overflow: since we don't have any (java) stack 240// space left we use the pre-allocated & pre-initialized StackOverflowError 241// klass to create an stack overflow error instance. We do not call its 242// constructor for the same reason (it is empty, anyway). 243IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 244 Handle exception = get_preinitialized_exception( 245 SystemDictionary::StackOverflowError_klass(), 246 CHECK); 247 THROW_HANDLE(exception); 248IRT_END 249 250 251IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 252 // lookup exception klass 253 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 254 if (ProfileTraps) { 255 if (s == vmSymbols::java_lang_ArithmeticException()) { 256 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 257 } else if (s == vmSymbols::java_lang_NullPointerException()) { 258 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 259 } 260 } 261 // create exception 262 Handle exception = Exceptions::new_exception(thread, s(), message); 263 thread->set_vm_result(exception()); 264IRT_END 265 266 267IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 268 ResourceMark rm(thread); 269 const char* klass_name = Klass::cast(obj->klass())->external_name(); 270 // lookup exception klass 271 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 272 if (ProfileTraps) { 273 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 274 } 275 // create exception, with klass name as detail message 276 Handle exception = Exceptions::new_exception(thread, s(), klass_name); 277 thread->set_vm_result(exception()); 278IRT_END 279 280 281IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 282 char message[jintAsStringSize]; 283 // lookup exception klass 284 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); 285 if (ProfileTraps) { 286 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 287 } 288 // create exception 289 sprintf(message, "%d", index); 290 THROW_MSG(s(), message); 291IRT_END 292 293IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 294 JavaThread* thread, oopDesc* obj)) 295 296 ResourceMark rm(thread); 297 char* message = SharedRuntime::generate_class_cast_message( 298 thread, Klass::cast(obj->klass())->external_name()); 299 300 if (ProfileTraps) { 301 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 302 } 303 304 // create exception 305 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 306IRT_END 307 308// required can be either a MethodType, or a Class (for a single argument) 309// actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) 310IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, 311 oopDesc* required, 312 oopDesc* actual)) { 313 ResourceMark rm(thread); 314 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); 315 316 if (ProfileTraps) { 317 note_trap(thread, Deoptimization::Reason_constraint, CHECK); 318 } 319 320 // create exception 321 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); 322} 323IRT_END 324 325 326 327// exception_handler_for_exception(...) returns the continuation address, 328// the exception oop (via TLS) and sets the bci/bcp for the continuation. 329// The exception oop is returned to make sure it is preserved over GC (it 330// is only on the stack if the exception was thrown explicitly via athrow). 331// During this operation, the expression stack contains the values for the 332// bci where the exception happened. If the exception was propagated back 333// from a call, the expression stack contains the values for the bci at the 334// invoke w/o arguments (i.e., as if one were inside the call). 335IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 336 337 Handle h_exception(thread, exception); 338 methodHandle h_method (thread, method(thread)); 339 constantPoolHandle h_constants(thread, h_method->constants()); 340 typeArrayHandle h_extable (thread, h_method->exception_table()); 341 bool should_repeat; 342 int handler_bci; 343 int current_bci = bci(thread); 344 345 // Need to do this check first since when _do_not_unlock_if_synchronized 346 // is set, we don't want to trigger any classloading which may make calls 347 // into java, or surprisingly find a matching exception handler for bci 0 348 // since at this moment the method hasn't been "officially" entered yet. 349 if (thread->do_not_unlock_if_synchronized()) { 350 ResourceMark rm; 351 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 352 thread->set_vm_result(exception); 353#ifdef CC_INTERP 354 return (address) -1; 355#else 356 return Interpreter::remove_activation_entry(); 357#endif 358 } 359 360 do { 361 should_repeat = false; 362 363 // assertions 364#ifdef ASSERT 365 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 366 assert(h_exception->is_oop(), "just checking"); 367 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 368 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 369 if (ExitVMOnVerifyError) vm_exit(-1); 370 ShouldNotReachHere(); 371 } 372#endif 373 374 // tracing 375 if (TraceExceptions) { 376 ttyLocker ttyl; 377 ResourceMark rm(thread); 378 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 379 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 380 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 381 } 382// Don't go paging in something which won't be used. 383// else if (h_extable->length() == 0) { 384// // disabled for now - interpreter is not using shortcut yet 385// // (shortcut is not to call runtime if we have no exception handlers) 386// // warning("performance bug: should not call runtime if method has no exception handlers"); 387// } 388 // for AbortVMOnException flag 389 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 390 391 // exception handler lookup 392 KlassHandle h_klass(THREAD, h_exception->klass()); 393 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); 394 if (HAS_PENDING_EXCEPTION) { 395 // We threw an exception while trying to find the exception handler. 396 // Transfer the new exception to the exception handle which will 397 // be set into thread local storage, and do another lookup for an 398 // exception handler for this exception, this time starting at the 399 // BCI of the exception handler which caused the exception to be 400 // thrown (bug 4307310). 401 h_exception = Handle(THREAD, PENDING_EXCEPTION); 402 CLEAR_PENDING_EXCEPTION; 403 if (handler_bci >= 0) { 404 current_bci = handler_bci; 405 should_repeat = true; 406 } 407 } 408 } while (should_repeat == true); 409 410 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 411 // time throw or a stack unwinding throw and accordingly notify the debugger 412 if (JvmtiExport::can_post_on_exceptions()) { 413 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 414 } 415 416#ifdef CC_INTERP 417 address continuation = (address)(intptr_t) handler_bci; 418#else 419 address continuation = NULL; 420#endif 421 address handler_pc = NULL; 422 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 423 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 424 // handler in this method, or (b) after a stack overflow there is not yet 425 // enough stack space available to reprotect the stack. 426#ifndef CC_INTERP 427 continuation = Interpreter::remove_activation_entry(); 428#endif 429 // Count this for compilation purposes 430 h_method->interpreter_throwout_increment(); 431 } else { 432 // handler in this method => change bci/bcp to handler bci/bcp and continue there 433 handler_pc = h_method->code_base() + handler_bci; 434#ifndef CC_INTERP 435 set_bcp_and_mdp(handler_pc, thread); 436 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 437#endif 438 } 439 // notify debugger of an exception catch 440 // (this is good for exceptions caught in native methods as well) 441 if (JvmtiExport::can_post_on_exceptions()) { 442 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 443 } 444 445 thread->set_vm_result(h_exception()); 446 return continuation; 447IRT_END 448 449 450IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 451 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 452 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 453IRT_END 454 455 456IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 457 THROW(vmSymbols::java_lang_AbstractMethodError()); 458IRT_END 459 460 461IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 462 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 463IRT_END 464 465 466//------------------------------------------------------------------------------------------------------------------------ 467// Fields 468// 469 470IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 471 // resolve field 472 FieldAccessInfo info; 473 constantPoolHandle pool(thread, method(thread)->constants()); 474 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 475 476 { 477 JvmtiHideSingleStepping jhss(thread); 478 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), 479 bytecode, false, CHECK); 480 } // end JvmtiHideSingleStepping 481 482 // check if link resolution caused cpCache to be updated 483 if (already_resolved(thread)) return; 484 485 // compute auxiliary field attributes 486 TosState state = as_TosState(info.field_type()); 487 488 // We need to delay resolving put instructions on final fields 489 // until we actually invoke one. This is required so we throw 490 // exceptions at the correct place. If we do not resolve completely 491 // in the current pass, leaving the put_code set to zero will 492 // cause the next put instruction to reresolve. 493 bool is_put = (bytecode == Bytecodes::_putfield || 494 bytecode == Bytecodes::_putstatic); 495 Bytecodes::Code put_code = (Bytecodes::Code)0; 496 497 // We also need to delay resolving getstatic instructions until the 498 // class is intitialized. This is required so that access to the static 499 // field will call the initialization function every time until the class 500 // is completely initialized ala. in 2.17.5 in JVM Specification. 501 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); 502 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 503 !klass->is_initialized()); 504 Bytecodes::Code get_code = (Bytecodes::Code)0; 505 506 507 if (!uninitialized_static) { 508 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 509 if (is_put || !info.access_flags().is_final()) { 510 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 511 } 512 } 513 514 cache_entry(thread)->set_field( 515 get_code, 516 put_code, 517 info.klass(), 518 info.field_index(), 519 info.field_offset(), 520 state, 521 info.access_flags().is_final(), 522 info.access_flags().is_volatile() 523 ); 524IRT_END 525 526 527//------------------------------------------------------------------------------------------------------------------------ 528// Synchronization 529// 530// The interpreter's synchronization code is factored out so that it can 531// be shared by method invocation and synchronized blocks. 532//%note synchronization_3 533 534static void trace_locking(Handle& h_locking_obj, bool is_locking) { 535 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); 536} 537 538 539//%note monitor_1 540IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 541#ifdef ASSERT 542 thread->last_frame().interpreter_frame_verify_monitor(elem); 543#endif 544 if (PrintBiasedLockingStatistics) { 545 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 546 } 547 Handle h_obj(thread, elem->obj()); 548 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 549 "must be NULL or an object"); 550 if (UseBiasedLocking) { 551 // Retry fast entry if bias is revoked to avoid unnecessary inflation 552 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 553 } else { 554 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 555 } 556 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 557 "must be NULL or an object"); 558#ifdef ASSERT 559 thread->last_frame().interpreter_frame_verify_monitor(elem); 560#endif 561IRT_END 562 563 564//%note monitor_1 565IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 566#ifdef ASSERT 567 thread->last_frame().interpreter_frame_verify_monitor(elem); 568#endif 569 Handle h_obj(thread, elem->obj()); 570 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 571 "must be NULL or an object"); 572 if (elem == NULL || h_obj()->is_unlocked()) { 573 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 574 } 575 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 576 // Free entry. This must be done here, since a pending exception might be installed on 577 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 578 elem->set_obj(NULL); 579#ifdef ASSERT 580 thread->last_frame().interpreter_frame_verify_monitor(elem); 581#endif 582IRT_END 583 584 585IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 586 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 587IRT_END 588 589 590IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 591 // Returns an illegal exception to install into the current thread. The 592 // pending_exception flag is cleared so normal exception handling does not 593 // trigger. Any current installed exception will be overwritten. This 594 // method will be called during an exception unwind. 595 596 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 597 Handle exception(thread, thread->vm_result()); 598 assert(exception() != NULL, "vm result should be set"); 599 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 600 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 601 exception = get_preinitialized_exception( 602 SystemDictionary::IllegalMonitorStateException_klass(), 603 CATCH); 604 } 605 thread->set_vm_result(exception()); 606IRT_END 607 608 609//------------------------------------------------------------------------------------------------------------------------ 610// Invokes 611 612IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) 613 return method->orig_bytecode_at(method->bci_from(bcp)); 614IRT_END 615 616IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) 617 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 618IRT_END 619 620IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) 621 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 622IRT_END 623 624IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) 625 // extract receiver from the outgoing argument list if necessary 626 Handle receiver(thread, NULL); 627 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 628 ResourceMark rm(thread); 629 methodHandle m (thread, method(thread)); 630 Bytecode_invoke* call = Bytecode_invoke_at(m, bci(thread)); 631 symbolHandle signature (thread, call->signature()); 632 receiver = Handle(thread, 633 thread->last_frame().interpreter_callee_receiver(signature)); 634 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 635 "sanity check"); 636 assert(receiver.is_null() || 637 Universe::heap()->is_in_reserved(receiver->klass()), 638 "sanity check"); 639 } 640 641 // resolve method 642 CallInfo info; 643 constantPoolHandle pool(thread, method(thread)->constants()); 644 645 { 646 JvmtiHideSingleStepping jhss(thread); 647 LinkResolver::resolve_invoke(info, receiver, pool, 648 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 649 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 650 int retry_count = 0; 651 while (info.resolved_method()->is_old()) { 652 // It is very unlikely that method is redefined more than 100 times 653 // in the middle of resolve. If it is looping here more than 100 times 654 // means then there could be a bug here. 655 guarantee((retry_count++ < 100), 656 "Could not resolve to latest version of redefined method"); 657 // method is redefined in the middle of resolve so re-try. 658 LinkResolver::resolve_invoke(info, receiver, pool, 659 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 660 } 661 } 662 } // end JvmtiHideSingleStepping 663 664 // check if link resolution caused cpCache to be updated 665 if (already_resolved(thread)) return; 666 667 if (bytecode == Bytecodes::_invokeinterface) { 668 669 if (TraceItables && Verbose) { 670 ResourceMark rm(thread); 671 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 672 } 673 if (info.resolved_method()->method_holder() == 674 SystemDictionary::Object_klass()) { 675 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 676 // (see also cpCacheOop.cpp for details) 677 methodHandle rm = info.resolved_method(); 678 assert(rm->is_final() || info.has_vtable_index(), 679 "should have been set already"); 680 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); 681 } else { 682 // Setup itable entry 683 int index = klassItable::compute_itable_index(info.resolved_method()()); 684 cache_entry(thread)->set_interface_call(info.resolved_method(), index); 685 } 686 } else { 687 cache_entry(thread)->set_method( 688 bytecode, 689 info.resolved_method(), 690 info.vtable_index()); 691 } 692IRT_END 693 694 695// First time execution: Resolve symbols, create a permanent CallSite object. 696IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 697 ResourceMark rm(thread); 698 699 assert(EnableInvokeDynamic, ""); 700 701 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 702 703 methodHandle caller_method(thread, method(thread)); 704 705 constantPoolHandle pool(thread, caller_method->constants()); 706 pool->set_invokedynamic(); // mark header to flag active call sites 707 708 int caller_bci = 0; 709 int site_index = 0; 710 { address caller_bcp = bcp(thread); 711 caller_bci = caller_method->bci_from(caller_bcp); 712 site_index = Bytes::get_native_u4(caller_bcp+1); 713 } 714 assert(site_index == InterpreterRuntime::bytecode(thread)->get_index_u4(bytecode), ""); 715 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); 716 // there is a second CPC entries that is of interest; it caches signature info: 717 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); 718 719 // first resolve the signature to a MH.invoke methodOop 720 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { 721 JvmtiHideSingleStepping jhss(thread); 722 CallInfo info; 723 LinkResolver::resolve_invoke(info, Handle(), pool, 724 site_index, bytecode, CHECK); 725 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves 726 // as a common reference point for all invokedynamic call sites with 727 // that exact call descriptor. We will link it in the CP cache exactly 728 // as if it were an invokevirtual of MethodHandle.invoke. 729 pool->cache()->entry_at(main_index)->set_method( 730 bytecode, 731 info.resolved_method(), 732 info.vtable_index()); 733 } 734 735 // The method (f2 entry) of the main entry is the MH.invoke for the 736 // invokedynamic target call signature. 737 oop f1_value = pool->cache()->entry_at(main_index)->f1(); 738 methodHandle signature_invoker(THREAD, (methodOop) f1_value); 739 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), 740 "correct result from LinkResolver::resolve_invokedynamic"); 741 742 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci, 743 main_index, CHECK); 744 if (bootm.is_null()) { 745 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 746 "no bootstrap method found for invokedynamic"); 747 } 748 749 // Short circuit if CallSite has been bound already: 750 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null()) 751 return; 752 753 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index)); 754 755 Handle info; // NYI: Other metadata from a new kind of CP entry. (Annotations?) 756 757 Handle call_site 758 = SystemDictionary::make_dynamic_call_site(bootm, 759 // Callee information: 760 call_site_name, 761 signature_invoker, 762 info, 763 // Caller information: 764 caller_method, 765 caller_bci, 766 CHECK); 767 768 // In the secondary entry, the f1 field is the call site, and the f2 (index) 769 // field is some data about the invoke site. Currently, it is just the BCI. 770 // Later, it might be changed to help manage inlining dependencies. 771 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); 772} 773IRT_END 774 775 776//------------------------------------------------------------------------------------------------------------------------ 777// Miscellaneous 778 779 780#ifndef PRODUCT 781static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) { 782 if (TraceInvocationCounterOverflow) { 783 InvocationCounter* ic = m->invocation_counter(); 784 InvocationCounter* bc = m->backedge_counter(); 785 ResourceMark rm; 786 const char* msg = 787 branch_bcp == NULL 788 ? "comp-policy cntr ovfl @ %d in entry of " 789 : "comp-policy cntr ovfl @ %d in loop of "; 790 tty->print(msg, bci); 791 m->print_value(); 792 tty->cr(); 793 ic->print(); 794 bc->print(); 795 if (ProfileInterpreter) { 796 if (branch_bcp != NULL) { 797 methodDataOop mdo = m->method_data(); 798 if (mdo != NULL) { 799 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); 800 tty->print_cr("back branch count = %d", count); 801 } 802 } 803 } 804 } 805} 806 807static void trace_osr_request(methodHandle method, nmethod* osr, int bci) { 808 if (TraceOnStackReplacement) { 809 ResourceMark rm; 810 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); 811 method->print_short_name(tty); 812 tty->print_cr(" at bci %d", bci); 813 } 814} 815#endif // !PRODUCT 816 817nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 818 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 819 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 820 if (branch_bcp != NULL && nm != NULL) { 821 // This was a successful request for an OSR nmethod. Because 822 // frequency_counter_overflow_inner ends with a safepoint check, 823 // nm could have been unloaded so look it up again. It's unsafe 824 // to examine nm directly since it might have been freed and used 825 // for something else. 826 frame fr = thread->last_frame(); 827 methodOop method = fr.interpreter_frame_method(); 828 int bci = method->bci_from(fr.interpreter_frame_bcp()); 829 nm = method->lookup_osr_nmethod_for(bci); 830 } 831 return nm; 832} 833 834IRT_ENTRY(nmethod*, 835 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 836 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 837 // flag, in case this method triggers classloading which will call into Java. 838 UnlockFlagSaver fs(thread); 839 840 frame fr = thread->last_frame(); 841 assert(fr.is_interpreted_frame(), "must come from interpreter"); 842 methodHandle method(thread, fr.interpreter_frame_method()); 843 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0; 844 const int bci = method->bci_from(fr.interpreter_frame_bcp()); 845 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);) 846 847 if (JvmtiExport::can_post_interpreter_events()) { 848 if (thread->is_interp_only_mode()) { 849 // If certain JVMTI events (e.g. frame pop event) are requested then the 850 // thread is forced to remain in interpreted code. This is 851 // implemented partly by a check in the run_compiled_code 852 // section of the interpreter whether we should skip running 853 // compiled code, and partly by skipping OSR compiles for 854 // interpreted-only threads. 855 if (branch_bcp != NULL) { 856 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); 857 return NULL; 858 } 859 } 860 } 861 862 if (branch_bcp == NULL) { 863 // when code cache is full, compilation gets switched off, UseCompiler 864 // is set to false 865 if (!method->has_compiled_code() && UseCompiler) { 866 CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL); 867 } else { 868 // Force counter overflow on method entry, even if no compilation 869 // happened. (The method_invocation_event call does this also.) 870 CompilationPolicy::policy()->reset_counter_for_invocation_event(method); 871 } 872 // compilation at an invocation overflow no longer goes and retries test for 873 // compiled method. We always run the loser of the race as interpreted. 874 // so return NULL 875 return NULL; 876 } else { 877 // counter overflow in a loop => try to do on-stack-replacement 878 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci); 879 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);) 880 // when code cache is full, we should not compile any more... 881 if (osr_nm == NULL && UseCompiler) { 882 const int branch_bci = method->bci_from(branch_bcp); 883 CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL); 884 osr_nm = method->lookup_osr_nmethod_for(bci); 885 } 886 if (osr_nm == NULL) { 887 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); 888 return NULL; 889 } else { 890 // We may need to do on-stack replacement which requires that no 891 // monitors in the activation are biased because their 892 // BasicObjectLocks will need to migrate during OSR. Force 893 // unbiasing of all monitors in the activation now (even though 894 // the OSR nmethod might be invalidated) because we don't have a 895 // safepoint opportunity later once the migration begins. 896 if (UseBiasedLocking) { 897 ResourceMark rm; 898 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 899 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 900 kptr < fr.interpreter_frame_monitor_begin(); 901 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 902 if( kptr->obj() != NULL ) { 903 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 904 } 905 } 906 BiasedLocking::revoke(objects_to_revoke); 907 } 908 return osr_nm; 909 } 910 } 911IRT_END 912 913IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) 914 assert(ProfileInterpreter, "must be profiling interpreter"); 915 int bci = method->bci_from(cur_bcp); 916 methodDataOop mdo = method->method_data(); 917 if (mdo == NULL) return 0; 918 return mdo->bci_to_di(bci); 919IRT_END 920 921IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) 922 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 923 // flag, in case this method triggers classloading which will call into Java. 924 UnlockFlagSaver fs(thread); 925 926 assert(ProfileInterpreter, "must be profiling interpreter"); 927 frame fr = thread->last_frame(); 928 assert(fr.is_interpreted_frame(), "must come from interpreter"); 929 methodHandle method(thread, fr.interpreter_frame_method()); 930 int bci = method->bci_from(cur_bcp); 931 methodOopDesc::build_interpreter_method_data(method, THREAD); 932 if (HAS_PENDING_EXCEPTION) { 933 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 934 CLEAR_PENDING_EXCEPTION; 935 // and fall through... 936 } 937 methodDataOop mdo = method->method_data(); 938 if (mdo == NULL) return 0; 939 return mdo->bci_to_di(bci); 940IRT_END 941 942 943#ifdef ASSERT 944IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) 945 assert(ProfileInterpreter, "must be profiling interpreter"); 946 947 methodDataOop mdo = method->method_data(); 948 assert(mdo != NULL, "must not be null"); 949 950 int bci = method->bci_from(bcp); 951 952 address mdp2 = mdo->bci_to_dp(bci); 953 if (mdp != mdp2) { 954 ResourceMark rm; 955 ResetNoHandleMark rnm; // In a LEAF entry. 956 HandleMark hm; 957 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 958 int current_di = mdo->dp_to_di(mdp); 959 int expected_di = mdo->dp_to_di(mdp2); 960 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 961 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 962 int approx_bci = -1; 963 if (current_di >= 0) { 964 approx_bci = mdo->data_at(current_di)->bci(); 965 } 966 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 967 mdo->print_on(tty); 968 method->print_codes(); 969 } 970 assert(mdp == mdp2, "wrong mdp"); 971IRT_END 972#endif // ASSERT 973 974IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 975 assert(ProfileInterpreter, "must be profiling interpreter"); 976 ResourceMark rm(thread); 977 HandleMark hm(thread); 978 frame fr = thread->last_frame(); 979 assert(fr.is_interpreted_frame(), "must come from interpreter"); 980 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); 981 982 // Grab a lock to ensure atomic access to setting the return bci and 983 // the displacement. This can block and GC, invalidating all naked oops. 984 MutexLocker ml(RetData_lock); 985 986 // ProfileData is essentially a wrapper around a derived oop, so we 987 // need to take the lock before making any ProfileData structures. 988 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 989 RetData* rdata = data->as_RetData(); 990 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 991 fr.interpreter_frame_set_mdp(new_mdp); 992IRT_END 993 994 995IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 996 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 997 // stack traversal automatically takes care of preserving arguments for invoke, so 998 // this is no longer needed. 999 1000 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1001 // if this is called during a safepoint 1002 1003 if (JvmtiExport::should_post_single_step()) { 1004 // We are called during regular safepoints and when the VM is 1005 // single stepping. If any thread is marked for single stepping, 1006 // then we may have JVMTI work to do. 1007 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1008 } 1009IRT_END 1010 1011IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1012ConstantPoolCacheEntry *cp_entry)) 1013 1014 // check the access_flags for the field in the klass 1015 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); 1016 typeArrayOop fields = ik->fields(); 1017 int index = cp_entry->field_index(); 1018 assert(index < fields->length(), "holders field index is out of range"); 1019 // bail out if field accesses are not watched 1020 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1021 1022 switch(cp_entry->flag_state()) { 1023 case btos: // fall through 1024 case ctos: // fall through 1025 case stos: // fall through 1026 case itos: // fall through 1027 case ftos: // fall through 1028 case ltos: // fall through 1029 case dtos: // fall through 1030 case atos: break; 1031 default: ShouldNotReachHere(); return; 1032 } 1033 bool is_static = (obj == NULL); 1034 HandleMark hm(thread); 1035 1036 Handle h_obj; 1037 if (!is_static) { 1038 // non-static field accessors have an object, but we need a handle 1039 h_obj = Handle(thread, obj); 1040 } 1041 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); 1042 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); 1043 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1044IRT_END 1045 1046IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1047 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1048 1049 klassOop k = (klassOop)cp_entry->f1(); 1050 1051 // check the access_flags for the field in the klass 1052 instanceKlass* ik = instanceKlass::cast(k); 1053 typeArrayOop fields = ik->fields(); 1054 int index = cp_entry->field_index(); 1055 assert(index < fields->length(), "holders field index is out of range"); 1056 // bail out if field modifications are not watched 1057 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1058 1059 char sig_type = '\0'; 1060 1061 switch(cp_entry->flag_state()) { 1062 case btos: sig_type = 'Z'; break; 1063 case ctos: sig_type = 'C'; break; 1064 case stos: sig_type = 'S'; break; 1065 case itos: sig_type = 'I'; break; 1066 case ftos: sig_type = 'F'; break; 1067 case atos: sig_type = 'L'; break; 1068 case ltos: sig_type = 'J'; break; 1069 case dtos: sig_type = 'D'; break; 1070 default: ShouldNotReachHere(); return; 1071 } 1072 bool is_static = (obj == NULL); 1073 1074 HandleMark hm(thread); 1075 instanceKlassHandle h_klass(thread, k); 1076 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); 1077 jvalue fvalue; 1078#ifdef _LP64 1079 fvalue = *value; 1080#else 1081 // Long/double values are stored unaligned and also noncontiguously with 1082 // tagged stacks. We can't just do a simple assignment even in the non- 1083 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1084 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1085 // We assume that the two halves of longs/doubles are stored in interpreter 1086 // stack slots in platform-endian order. 1087 jlong_accessor u; 1088 jint* newval = (jint*)value; 1089 u.words[0] = newval[0]; 1090 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1091 fvalue.j = u.long_value; 1092#endif // _LP64 1093 1094 Handle h_obj; 1095 if (!is_static) { 1096 // non-static field accessors have an object, but we need a handle 1097 h_obj = Handle(thread, obj); 1098 } 1099 1100 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1101 fid, sig_type, &fvalue); 1102IRT_END 1103 1104IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1105 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1106IRT_END 1107 1108 1109IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1110 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1111IRT_END 1112 1113IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1114{ 1115 return (Interpreter::contains(pc) ? 1 : 0); 1116} 1117IRT_END 1118 1119 1120// Implementation of SignatureHandlerLibrary 1121 1122address SignatureHandlerLibrary::set_handler_blob() { 1123 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1124 if (handler_blob == NULL) { 1125 return NULL; 1126 } 1127 address handler = handler_blob->code_begin(); 1128 _handler_blob = handler_blob; 1129 _handler = handler; 1130 return handler; 1131} 1132 1133void SignatureHandlerLibrary::initialize() { 1134 if (_fingerprints != NULL) { 1135 return; 1136 } 1137 if (set_handler_blob() == NULL) { 1138 vm_exit_out_of_memory(blob_size, "native signature handlers"); 1139 } 1140 1141 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1142 SignatureHandlerLibrary::buffer_size); 1143 _buffer = bb->code_begin(); 1144 1145 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); 1146 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); 1147} 1148 1149address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1150 address handler = _handler; 1151 int insts_size = buffer->pure_insts_size(); 1152 if (handler + insts_size > _handler_blob->code_end()) { 1153 // get a new handler blob 1154 handler = set_handler_blob(); 1155 } 1156 if (handler != NULL) { 1157 memcpy(handler, buffer->insts_begin(), insts_size); 1158 pd_set_handler(handler); 1159 ICache::invalidate_range(handler, insts_size); 1160 _handler = handler + insts_size; 1161 } 1162 return handler; 1163} 1164 1165void SignatureHandlerLibrary::add(methodHandle method) { 1166 if (method->signature_handler() == NULL) { 1167 // use slow signature handler if we can't do better 1168 int handler_index = -1; 1169 // check if we can use customized (fast) signature handler 1170 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1171 // use customized signature handler 1172 MutexLocker mu(SignatureHandlerLibrary_lock); 1173 // make sure data structure is initialized 1174 initialize(); 1175 // lookup method signature's fingerprint 1176 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1177 handler_index = _fingerprints->find(fingerprint); 1178 // create handler if necessary 1179 if (handler_index < 0) { 1180 ResourceMark rm; 1181 ptrdiff_t align_offset = (address) 1182 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1183 CodeBuffer buffer((address)(_buffer + align_offset), 1184 SignatureHandlerLibrary::buffer_size - align_offset); 1185 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1186 // copy into code heap 1187 address handler = set_handler(&buffer); 1188 if (handler == NULL) { 1189 // use slow signature handler 1190 } else { 1191 // debugging suppport 1192 if (PrintSignatureHandlers) { 1193 tty->cr(); 1194 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1195 _handlers->length(), 1196 (method->is_static() ? "static" : "receiver"), 1197 method->name_and_sig_as_C_string(), 1198 fingerprint, 1199 buffer.insts_size()); 1200 Disassembler::decode(handler, handler + buffer.insts_size()); 1201#ifndef PRODUCT 1202 tty->print_cr(" --- associated result handler ---"); 1203 address rh_begin = Interpreter::result_handler(method()->result_type()); 1204 address rh_end = rh_begin; 1205 while (*(int*)rh_end != 0) { 1206 rh_end += sizeof(int); 1207 } 1208 Disassembler::decode(rh_begin, rh_end); 1209#endif 1210 } 1211 // add handler to library 1212 _fingerprints->append(fingerprint); 1213 _handlers->append(handler); 1214 // set handler index 1215 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1216 handler_index = _fingerprints->length() - 1; 1217 } 1218 } 1219 } else { 1220 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1221 } 1222 if (handler_index < 0) { 1223 // use generic signature handler 1224 method->set_signature_handler(Interpreter::slow_signature_handler()); 1225 } else { 1226 // set handler 1227 method->set_signature_handler(_handlers->at(handler_index)); 1228 } 1229 } 1230 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1231 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), 1232 "sanity check"); 1233} 1234 1235 1236BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1237address SignatureHandlerLibrary::_handler = NULL; 1238GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1239GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1240address SignatureHandlerLibrary::_buffer = NULL; 1241 1242 1243IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) 1244 methodHandle m(thread, method); 1245 assert(m->is_native(), "sanity check"); 1246 // lookup native function entry point if it doesn't exist 1247 bool in_base_library; 1248 if (!m->has_native_function()) { 1249 NativeLookup::lookup(m, in_base_library, CHECK); 1250 } 1251 // make sure signature handler is installed 1252 SignatureHandlerLibrary::add(m); 1253 // The interpreter entry point checks the signature handler first, 1254 // before trying to fetch the native entry point and klass mirror. 1255 // We must set the signature handler last, so that multiple processors 1256 // preparing the same method will be sure to see non-null entry & mirror. 1257IRT_END 1258 1259#if defined(IA32) || defined(AMD64) 1260IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1261 if (src_address == dest_address) { 1262 return; 1263 } 1264 ResetNoHandleMark rnm; // In a LEAF entry. 1265 HandleMark hm; 1266 ResourceMark rm; 1267 frame fr = thread->last_frame(); 1268 assert(fr.is_interpreted_frame(), ""); 1269 jint bci = fr.interpreter_frame_bci(); 1270 methodHandle mh(thread, fr.interpreter_frame_method()); 1271 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); 1272 ArgumentSizeComputer asc(invoke->signature()); 1273 int size_of_arguments = (asc.size() + (invoke->has_receiver() ? 1 : 0)); // receiver 1274 Copy::conjoint_jbytes(src_address, dest_address, 1275 size_of_arguments * Interpreter::stackElementSize); 1276IRT_END 1277#endif 1278