interpreterRuntime.cpp revision 2073:b92c45f2bc75
1275970Scy/* 2275970Scy * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 3275970Scy * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4275970Scy * 5275970Scy * This code is free software; you can redistribute it and/or modify it 6275970Scy * under the terms of the GNU General Public License version 2 only, as 7289997Sglebius * published by the Free Software Foundation. 8289997Sglebius * 9289997Sglebius * This code is distributed in the hope that it will be useful, but WITHOUT 10275970Scy * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11275970Scy * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/systemDictionary.hpp" 27#include "classfile/vmSymbols.hpp" 28#include "compiler/compileBroker.hpp" 29#include "gc_interface/collectedHeap.hpp" 30#include "interpreter/interpreter.hpp" 31#include "interpreter/interpreterRuntime.hpp" 32#include "interpreter/linkResolver.hpp" 33#include "interpreter/templateTable.hpp" 34#include "memory/oopFactory.hpp" 35#include "memory/universe.inline.hpp" 36#include "oops/constantPoolOop.hpp" 37#include "oops/cpCacheOop.hpp" 38#include "oops/instanceKlass.hpp" 39#include "oops/methodDataOop.hpp" 40#include "oops/objArrayKlass.hpp" 41#include "oops/oop.inline.hpp" 42#include "oops/symbol.hpp" 43#include "prims/jvmtiExport.hpp" 44#include "prims/nativeLookup.hpp" 45#include "runtime/biasedLocking.hpp" 46#include "runtime/compilationPolicy.hpp" 47#include "runtime/deoptimization.hpp" 48#include "runtime/fieldDescriptor.hpp" 49#include "runtime/handles.inline.hpp" 50#include "runtime/interfaceSupport.hpp" 51#include "runtime/java.hpp" 52#include "runtime/jfieldIDWorkaround.hpp" 53#include "runtime/osThread.hpp" 54#include "runtime/sharedRuntime.hpp" 55#include "runtime/stubRoutines.hpp" 56#include "runtime/synchronizer.hpp" 57#include "runtime/threadCritical.hpp" 58#include "utilities/events.hpp" 59#ifdef TARGET_ARCH_x86 60# include "vm_version_x86.hpp" 61#endif 62#ifdef TARGET_ARCH_sparc 63# include "vm_version_sparc.hpp" 64#endif 65#ifdef TARGET_ARCH_zero 66# include "vm_version_zero.hpp" 67#endif 68#ifdef TARGET_ARCH_arm 69# include "vm_version_arm.hpp" 70#endif 71#ifdef TARGET_ARCH_ppc 72# include "vm_version_ppc.hpp" 73#endif 74#ifdef COMPILER2 75#include "opto/runtime.hpp" 76#endif 77 78class UnlockFlagSaver { 79 private: 80 JavaThread* _thread; 81 bool _do_not_unlock; 82 public: 83 UnlockFlagSaver(JavaThread* t) { 84 _thread = t; 85 _do_not_unlock = t->do_not_unlock_if_synchronized(); 86 t->set_do_not_unlock_if_synchronized(false); 87 } 88 ~UnlockFlagSaver() { 89 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 90 } 91}; 92 93//------------------------------------------------------------------------------------------------------------------------ 94// State accessors 95 96void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 97 last_frame(thread).interpreter_frame_set_bcp(bcp); 98 if (ProfileInterpreter) { 99 // ProfileTraps uses MDOs independently of ProfileInterpreter. 100 // That is why we must check both ProfileInterpreter and mdo != NULL. 101 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); 102 if (mdo != NULL) { 103 NEEDS_CLEANUP; 104 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 105 } 106 } 107} 108 109//------------------------------------------------------------------------------------------------------------------------ 110// Constants 111 112 113IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 114 // access constant pool 115 constantPoolOop pool = method(thread)->constants(); 116 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 117 constantTag tag = pool->tag_at(index); 118 119 if (tag.is_unresolved_klass() || tag.is_klass()) { 120 klassOop klass = pool->klass_at(index, CHECK); 121 oop java_class = klass->klass_part()->java_mirror(); 122 thread->set_vm_result(java_class); 123 } else { 124#ifdef ASSERT 125 // If we entered this runtime routine, we believed the tag contained 126 // an unresolved string, an unresolved class or a resolved class. 127 // However, another thread could have resolved the unresolved string 128 // or class by the time we go there. 129 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); 130#endif 131 oop s_oop = pool->string_at(index, CHECK); 132 thread->set_vm_result(s_oop); 133 } 134IRT_END 135 136IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 137 assert(bytecode == Bytecodes::_fast_aldc || 138 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 139 ResourceMark rm(thread); 140 methodHandle m (thread, method(thread)); 141 Bytecode_loadconstant ldc(m, bci(thread)); 142 oop result = ldc.resolve_constant(THREAD); 143 DEBUG_ONLY(ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc.cache_index())); 144 assert(result == cpce->f1(), "expected result for assembly code"); 145} 146IRT_END 147 148 149//------------------------------------------------------------------------------------------------------------------------ 150// Allocation 151 152IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) 153 klassOop k_oop = pool->klass_at(index, CHECK); 154 instanceKlassHandle klass (THREAD, k_oop); 155 156 // Make sure we are not instantiating an abstract klass 157 klass->check_valid_for_instantiation(true, CHECK); 158 159 // Make sure klass is initialized 160 klass->initialize(CHECK); 161 162 // At this point the class may not be fully initialized 163 // because of recursive initialization. If it is fully 164 // initialized & has_finalized is not set, we rewrite 165 // it into its fast version (Note: no locking is needed 166 // here since this is an atomic byte write and can be 167 // done more than once). 168 // 169 // Note: In case of classes with has_finalized we don't 170 // rewrite since that saves us an extra check in 171 // the fast version which then would call the 172 // slow version anyway (and do a call back into 173 // Java). 174 // If we have a breakpoint, then we don't rewrite 175 // because the _breakpoint bytecode would be lost. 176 oop obj = klass->allocate_instance(CHECK); 177 thread->set_vm_result(obj); 178IRT_END 179 180 181IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 182 oop obj = oopFactory::new_typeArray(type, size, CHECK); 183 thread->set_vm_result(obj); 184IRT_END 185 186 187IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) 188 // Note: no oopHandle for pool & klass needed since they are not used 189 // anymore after new_objArray() and no GC can happen before. 190 // (This may have to change if this code changes!) 191 klassOop klass = pool->klass_at(index, CHECK); 192 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 193 thread->set_vm_result(obj); 194IRT_END 195 196 197IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 198 // We may want to pass in more arguments - could make this slightly faster 199 constantPoolOop constants = method(thread)->constants(); 200 int i = get_index_u2(thread, Bytecodes::_multianewarray); 201 klassOop klass = constants->klass_at(i, CHECK); 202 int nof_dims = number_of_dimensions(thread); 203 assert(oop(klass)->is_klass(), "not a class"); 204 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 205 206 // We must create an array of jints to pass to multi_allocate. 207 ResourceMark rm(thread); 208 const int small_dims = 10; 209 jint dim_array[small_dims]; 210 jint *dims = &dim_array[0]; 211 if (nof_dims > small_dims) { 212 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 213 } 214 for (int index = 0; index < nof_dims; index++) { 215 // offset from first_size_address is addressed as local[index] 216 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 217 dims[index] = first_size_address[n]; 218 } 219 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 220 thread->set_vm_result(obj); 221IRT_END 222 223 224IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 225 assert(obj->is_oop(), "must be a valid oop"); 226 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); 227 instanceKlass::register_finalizer(instanceOop(obj), CHECK); 228IRT_END 229 230 231// Quicken instance-of and check-cast bytecodes 232IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 233 // Force resolving; quicken the bytecode 234 int which = get_index_u2(thread, Bytecodes::_checkcast); 235 constantPoolOop cpool = method(thread)->constants(); 236 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 237 // program we might have seen an unquick'd bytecode in the interpreter but have another 238 // thread quicken the bytecode before we get here. 239 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 240 klassOop klass = cpool->klass_at(which, CHECK); 241 thread->set_vm_result(klass); 242IRT_END 243 244 245//------------------------------------------------------------------------------------------------------------------------ 246// Exceptions 247 248// Assume the compiler is (or will be) interested in this event. 249// If necessary, create an MDO to hold the information, and record it. 250void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 251 assert(ProfileTraps, "call me only if profiling"); 252 methodHandle trap_method(thread, method(thread)); 253 254 if (trap_method.not_null()) { 255 methodDataHandle trap_mdo(thread, trap_method->method_data()); 256 if (trap_mdo.is_null()) { 257 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); 258 if (HAS_PENDING_EXCEPTION) { 259 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 260 CLEAR_PENDING_EXCEPTION; 261 } 262 trap_mdo = methodDataHandle(thread, trap_method->method_data()); 263 // and fall through... 264 } 265 if (trap_mdo.not_null()) { 266 // Update per-method count of trap events. The interpreter 267 // is updating the MDO to simulate the effect of compiler traps. 268 int trap_bci = trap_method->bci_from(bcp(thread)); 269 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 270 } 271 } 272} 273 274static Handle get_preinitialized_exception(klassOop k, TRAPS) { 275 // get klass 276 instanceKlass* klass = instanceKlass::cast(k); 277 assert(klass->is_initialized(), 278 "this klass should have been initialized during VM initialization"); 279 // create instance - do not call constructor since we may have no 280 // (java) stack space left (should assert constructor is empty) 281 Handle exception; 282 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 283 exception = Handle(THREAD, exception_oop); 284 if (StackTraceInThrowable) { 285 java_lang_Throwable::fill_in_stack_trace(exception); 286 } 287 return exception; 288} 289 290// Special handling for stack overflow: since we don't have any (java) stack 291// space left we use the pre-allocated & pre-initialized StackOverflowError 292// klass to create an stack overflow error instance. We do not call its 293// constructor for the same reason (it is empty, anyway). 294IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 295 Handle exception = get_preinitialized_exception( 296 SystemDictionary::StackOverflowError_klass(), 297 CHECK); 298 THROW_HANDLE(exception); 299IRT_END 300 301 302IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 303 // lookup exception klass 304 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 305 if (ProfileTraps) { 306 if (s == vmSymbols::java_lang_ArithmeticException()) { 307 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 308 } else if (s == vmSymbols::java_lang_NullPointerException()) { 309 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 310 } 311 } 312 // create exception 313 Handle exception = Exceptions::new_exception(thread, s, message); 314 thread->set_vm_result(exception()); 315IRT_END 316 317 318IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 319 ResourceMark rm(thread); 320 const char* klass_name = Klass::cast(obj->klass())->external_name(); 321 // lookup exception klass 322 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 323 if (ProfileTraps) { 324 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 325 } 326 // create exception, with klass name as detail message 327 Handle exception = Exceptions::new_exception(thread, s, klass_name); 328 thread->set_vm_result(exception()); 329IRT_END 330 331 332IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 333 char message[jintAsStringSize]; 334 // lookup exception klass 335 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 336 if (ProfileTraps) { 337 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 338 } 339 // create exception 340 sprintf(message, "%d", index); 341 THROW_MSG(s, message); 342IRT_END 343 344IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 345 JavaThread* thread, oopDesc* obj)) 346 347 ResourceMark rm(thread); 348 char* message = SharedRuntime::generate_class_cast_message( 349 thread, Klass::cast(obj->klass())->external_name()); 350 351 if (ProfileTraps) { 352 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 353 } 354 355 // create exception 356 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 357IRT_END 358 359// required can be either a MethodType, or a Class (for a single argument) 360// actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) 361IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, 362 oopDesc* required, 363 oopDesc* actual)) { 364 ResourceMark rm(thread); 365 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); 366 367 if (ProfileTraps) { 368 note_trap(thread, Deoptimization::Reason_constraint, CHECK); 369 } 370 371 // create exception 372 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); 373} 374IRT_END 375 376 377 378// exception_handler_for_exception(...) returns the continuation address, 379// the exception oop (via TLS) and sets the bci/bcp for the continuation. 380// The exception oop is returned to make sure it is preserved over GC (it 381// is only on the stack if the exception was thrown explicitly via athrow). 382// During this operation, the expression stack contains the values for the 383// bci where the exception happened. If the exception was propagated back 384// from a call, the expression stack contains the values for the bci at the 385// invoke w/o arguments (i.e., as if one were inside the call). 386IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 387 388 Handle h_exception(thread, exception); 389 methodHandle h_method (thread, method(thread)); 390 constantPoolHandle h_constants(thread, h_method->constants()); 391 typeArrayHandle h_extable (thread, h_method->exception_table()); 392 bool should_repeat; 393 int handler_bci; 394 int current_bci = bci(thread); 395 396 // Need to do this check first since when _do_not_unlock_if_synchronized 397 // is set, we don't want to trigger any classloading which may make calls 398 // into java, or surprisingly find a matching exception handler for bci 0 399 // since at this moment the method hasn't been "officially" entered yet. 400 if (thread->do_not_unlock_if_synchronized()) { 401 ResourceMark rm; 402 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 403 thread->set_vm_result(exception); 404#ifdef CC_INTERP 405 return (address) -1; 406#else 407 return Interpreter::remove_activation_entry(); 408#endif 409 } 410 411 do { 412 should_repeat = false; 413 414 // assertions 415#ifdef ASSERT 416 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 417 assert(h_exception->is_oop(), "just checking"); 418 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 419 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 420 if (ExitVMOnVerifyError) vm_exit(-1); 421 ShouldNotReachHere(); 422 } 423#endif 424 425 // tracing 426 if (TraceExceptions) { 427 ttyLocker ttyl; 428 ResourceMark rm(thread); 429 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 430 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 431 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 432 } 433// Don't go paging in something which won't be used. 434// else if (h_extable->length() == 0) { 435// // disabled for now - interpreter is not using shortcut yet 436// // (shortcut is not to call runtime if we have no exception handlers) 437// // warning("performance bug: should not call runtime if method has no exception handlers"); 438// } 439 // for AbortVMOnException flag 440 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 441 442 // exception handler lookup 443 KlassHandle h_klass(THREAD, h_exception->klass()); 444 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); 445 if (HAS_PENDING_EXCEPTION) { 446 // We threw an exception while trying to find the exception handler. 447 // Transfer the new exception to the exception handle which will 448 // be set into thread local storage, and do another lookup for an 449 // exception handler for this exception, this time starting at the 450 // BCI of the exception handler which caused the exception to be 451 // thrown (bug 4307310). 452 h_exception = Handle(THREAD, PENDING_EXCEPTION); 453 CLEAR_PENDING_EXCEPTION; 454 if (handler_bci >= 0) { 455 current_bci = handler_bci; 456 should_repeat = true; 457 } 458 } 459 } while (should_repeat == true); 460 461 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 462 // time throw or a stack unwinding throw and accordingly notify the debugger 463 if (JvmtiExport::can_post_on_exceptions()) { 464 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 465 } 466 467#ifdef CC_INTERP 468 address continuation = (address)(intptr_t) handler_bci; 469#else 470 address continuation = NULL; 471#endif 472 address handler_pc = NULL; 473 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 474 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 475 // handler in this method, or (b) after a stack overflow there is not yet 476 // enough stack space available to reprotect the stack. 477#ifndef CC_INTERP 478 continuation = Interpreter::remove_activation_entry(); 479#endif 480 // Count this for compilation purposes 481 h_method->interpreter_throwout_increment(); 482 } else { 483 // handler in this method => change bci/bcp to handler bci/bcp and continue there 484 handler_pc = h_method->code_base() + handler_bci; 485#ifndef CC_INTERP 486 set_bcp_and_mdp(handler_pc, thread); 487 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 488#endif 489 } 490 // notify debugger of an exception catch 491 // (this is good for exceptions caught in native methods as well) 492 if (JvmtiExport::can_post_on_exceptions()) { 493 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 494 } 495 496 thread->set_vm_result(h_exception()); 497 return continuation; 498IRT_END 499 500 501IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 502 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 503 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 504IRT_END 505 506 507IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 508 THROW(vmSymbols::java_lang_AbstractMethodError()); 509IRT_END 510 511 512IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 513 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 514IRT_END 515 516 517//------------------------------------------------------------------------------------------------------------------------ 518// Fields 519// 520 521IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 522 // resolve field 523 FieldAccessInfo info; 524 constantPoolHandle pool(thread, method(thread)->constants()); 525 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 526 527 { 528 JvmtiHideSingleStepping jhss(thread); 529 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), 530 bytecode, false, CHECK); 531 } // end JvmtiHideSingleStepping 532 533 // check if link resolution caused cpCache to be updated 534 if (already_resolved(thread)) return; 535 536 // compute auxiliary field attributes 537 TosState state = as_TosState(info.field_type()); 538 539 // We need to delay resolving put instructions on final fields 540 // until we actually invoke one. This is required so we throw 541 // exceptions at the correct place. If we do not resolve completely 542 // in the current pass, leaving the put_code set to zero will 543 // cause the next put instruction to reresolve. 544 bool is_put = (bytecode == Bytecodes::_putfield || 545 bytecode == Bytecodes::_putstatic); 546 Bytecodes::Code put_code = (Bytecodes::Code)0; 547 548 // We also need to delay resolving getstatic instructions until the 549 // class is intitialized. This is required so that access to the static 550 // field will call the initialization function every time until the class 551 // is completely initialized ala. in 2.17.5 in JVM Specification. 552 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); 553 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 554 !klass->is_initialized()); 555 Bytecodes::Code get_code = (Bytecodes::Code)0; 556 557 558 if (!uninitialized_static) { 559 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 560 if (is_put || !info.access_flags().is_final()) { 561 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 562 } 563 } 564 565 cache_entry(thread)->set_field( 566 get_code, 567 put_code, 568 info.klass(), 569 info.field_index(), 570 info.field_offset(), 571 state, 572 info.access_flags().is_final(), 573 info.access_flags().is_volatile() 574 ); 575IRT_END 576 577 578//------------------------------------------------------------------------------------------------------------------------ 579// Synchronization 580// 581// The interpreter's synchronization code is factored out so that it can 582// be shared by method invocation and synchronized blocks. 583//%note synchronization_3 584 585static void trace_locking(Handle& h_locking_obj, bool is_locking) { 586 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); 587} 588 589 590//%note monitor_1 591IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 592#ifdef ASSERT 593 thread->last_frame().interpreter_frame_verify_monitor(elem); 594#endif 595 if (PrintBiasedLockingStatistics) { 596 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 597 } 598 Handle h_obj(thread, elem->obj()); 599 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 600 "must be NULL or an object"); 601 if (UseBiasedLocking) { 602 // Retry fast entry if bias is revoked to avoid unnecessary inflation 603 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 604 } else { 605 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 606 } 607 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 608 "must be NULL or an object"); 609#ifdef ASSERT 610 thread->last_frame().interpreter_frame_verify_monitor(elem); 611#endif 612IRT_END 613 614 615//%note monitor_1 616IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 617#ifdef ASSERT 618 thread->last_frame().interpreter_frame_verify_monitor(elem); 619#endif 620 Handle h_obj(thread, elem->obj()); 621 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 622 "must be NULL or an object"); 623 if (elem == NULL || h_obj()->is_unlocked()) { 624 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 625 } 626 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 627 // Free entry. This must be done here, since a pending exception might be installed on 628 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 629 elem->set_obj(NULL); 630#ifdef ASSERT 631 thread->last_frame().interpreter_frame_verify_monitor(elem); 632#endif 633IRT_END 634 635 636IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 637 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 638IRT_END 639 640 641IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 642 // Returns an illegal exception to install into the current thread. The 643 // pending_exception flag is cleared so normal exception handling does not 644 // trigger. Any current installed exception will be overwritten. This 645 // method will be called during an exception unwind. 646 647 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 648 Handle exception(thread, thread->vm_result()); 649 assert(exception() != NULL, "vm result should be set"); 650 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 651 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 652 exception = get_preinitialized_exception( 653 SystemDictionary::IllegalMonitorStateException_klass(), 654 CATCH); 655 } 656 thread->set_vm_result(exception()); 657IRT_END 658 659 660//------------------------------------------------------------------------------------------------------------------------ 661// Invokes 662 663IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) 664 return method->orig_bytecode_at(method->bci_from(bcp)); 665IRT_END 666 667IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) 668 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 669IRT_END 670 671IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) 672 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 673IRT_END 674 675IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) 676 // extract receiver from the outgoing argument list if necessary 677 Handle receiver(thread, NULL); 678 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 679 ResourceMark rm(thread); 680 methodHandle m (thread, method(thread)); 681 Bytecode_invoke call(m, bci(thread)); 682 Symbol* signature = call.signature(); 683 receiver = Handle(thread, 684 thread->last_frame().interpreter_callee_receiver(signature)); 685 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 686 "sanity check"); 687 assert(receiver.is_null() || 688 Universe::heap()->is_in_reserved(receiver->klass()), 689 "sanity check"); 690 } 691 692 // resolve method 693 CallInfo info; 694 constantPoolHandle pool(thread, method(thread)->constants()); 695 696 { 697 JvmtiHideSingleStepping jhss(thread); 698 LinkResolver::resolve_invoke(info, receiver, pool, 699 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 700 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 701 int retry_count = 0; 702 while (info.resolved_method()->is_old()) { 703 // It is very unlikely that method is redefined more than 100 times 704 // in the middle of resolve. If it is looping here more than 100 times 705 // means then there could be a bug here. 706 guarantee((retry_count++ < 100), 707 "Could not resolve to latest version of redefined method"); 708 // method is redefined in the middle of resolve so re-try. 709 LinkResolver::resolve_invoke(info, receiver, pool, 710 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 711 } 712 } 713 } // end JvmtiHideSingleStepping 714 715 // check if link resolution caused cpCache to be updated 716 if (already_resolved(thread)) return; 717 718 if (bytecode == Bytecodes::_invokeinterface) { 719 720 if (TraceItables && Verbose) { 721 ResourceMark rm(thread); 722 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 723 } 724 if (info.resolved_method()->method_holder() == 725 SystemDictionary::Object_klass()) { 726 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 727 // (see also cpCacheOop.cpp for details) 728 methodHandle rm = info.resolved_method(); 729 assert(rm->is_final() || info.has_vtable_index(), 730 "should have been set already"); 731 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); 732 } else { 733 // Setup itable entry 734 int index = klassItable::compute_itable_index(info.resolved_method()()); 735 cache_entry(thread)->set_interface_call(info.resolved_method(), index); 736 } 737 } else { 738 cache_entry(thread)->set_method( 739 bytecode, 740 info.resolved_method(), 741 info.vtable_index()); 742 } 743IRT_END 744 745 746// First time execution: Resolve symbols, create a permanent CallSite object. 747IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 748 ResourceMark rm(thread); 749 750 assert(EnableInvokeDynamic, ""); 751 752 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 753 754 methodHandle caller_method(thread, method(thread)); 755 756 constantPoolHandle pool(thread, caller_method->constants()); 757 pool->set_invokedynamic(); // mark header to flag active call sites 758 759 int caller_bci = 0; 760 int site_index = 0; 761 { address caller_bcp = bcp(thread); 762 caller_bci = caller_method->bci_from(caller_bcp); 763 site_index = Bytes::get_native_u4(caller_bcp+1); 764 } 765 assert(site_index == InterpreterRuntime::bytecode(thread).get_index_u4(bytecode), ""); 766 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); 767 // there is a second CPC entries that is of interest; it caches signature info: 768 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); 769 int pool_index = pool->cache()->entry_at(main_index)->constant_pool_index(); 770 771 // first resolve the signature to a MH.invoke methodOop 772 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { 773 JvmtiHideSingleStepping jhss(thread); 774 CallInfo callinfo; 775 LinkResolver::resolve_invoke(callinfo, Handle(), pool, 776 site_index, bytecode, CHECK); 777 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves 778 // as a common reference point for all invokedynamic call sites with 779 // that exact call descriptor. We will link it in the CP cache exactly 780 // as if it were an invokevirtual of MethodHandle.invoke. 781 pool->cache()->entry_at(main_index)->set_method( 782 bytecode, 783 callinfo.resolved_method(), 784 callinfo.vtable_index()); 785 } 786 787 // The method (f2 entry) of the main entry is the MH.invoke for the 788 // invokedynamic target call signature. 789 oop f1_value = pool->cache()->entry_at(main_index)->f1(); 790 methodHandle signature_invoker(THREAD, (methodOop) f1_value); 791 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), 792 "correct result from LinkResolver::resolve_invokedynamic"); 793 794 Handle info; // optional argument(s) in JVM_CONSTANT_InvokeDynamic 795 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci, 796 main_index, info, CHECK); 797 if (!java_dyn_MethodHandle::is_instance(bootm())) { 798 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 799 "no bootstrap method found for invokedynamic"); 800 } 801 802 // Short circuit if CallSite has been bound already: 803 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null()) 804 return; 805 806 Symbol* call_site_name = pool->name_ref_at(site_index); 807 808 Handle call_site 809 = SystemDictionary::make_dynamic_call_site(bootm, 810 // Callee information: 811 call_site_name, 812 signature_invoker, 813 info, 814 // Caller information: 815 caller_method, 816 caller_bci, 817 CHECK); 818 819 // In the secondary entry, the f1 field is the call site, and the f2 (index) 820 // field is some data about the invoke site. Currently, it is just the BCI. 821 // Later, it might be changed to help manage inlining dependencies. 822 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); 823} 824IRT_END 825 826 827//------------------------------------------------------------------------------------------------------------------------ 828// Miscellaneous 829 830 831nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 832 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 833 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 834 if (branch_bcp != NULL && nm != NULL) { 835 // This was a successful request for an OSR nmethod. Because 836 // frequency_counter_overflow_inner ends with a safepoint check, 837 // nm could have been unloaded so look it up again. It's unsafe 838 // to examine nm directly since it might have been freed and used 839 // for something else. 840 frame fr = thread->last_frame(); 841 methodOop method = fr.interpreter_frame_method(); 842 int bci = method->bci_from(fr.interpreter_frame_bcp()); 843 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 844 } 845 return nm; 846} 847 848IRT_ENTRY(nmethod*, 849 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 850 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 851 // flag, in case this method triggers classloading which will call into Java. 852 UnlockFlagSaver fs(thread); 853 854 frame fr = thread->last_frame(); 855 assert(fr.is_interpreted_frame(), "must come from interpreter"); 856 methodHandle method(thread, fr.interpreter_frame_method()); 857 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 858 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 859 860 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, thread); 861 862 if (osr_nm != NULL) { 863 // We may need to do on-stack replacement which requires that no 864 // monitors in the activation are biased because their 865 // BasicObjectLocks will need to migrate during OSR. Force 866 // unbiasing of all monitors in the activation now (even though 867 // the OSR nmethod might be invalidated) because we don't have a 868 // safepoint opportunity later once the migration begins. 869 if (UseBiasedLocking) { 870 ResourceMark rm; 871 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 872 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 873 kptr < fr.interpreter_frame_monitor_begin(); 874 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 875 if( kptr->obj() != NULL ) { 876 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 877 } 878 } 879 BiasedLocking::revoke(objects_to_revoke); 880 } 881 } 882 return osr_nm; 883IRT_END 884 885IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) 886 assert(ProfileInterpreter, "must be profiling interpreter"); 887 int bci = method->bci_from(cur_bcp); 888 methodDataOop mdo = method->method_data(); 889 if (mdo == NULL) return 0; 890 return mdo->bci_to_di(bci); 891IRT_END 892 893IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 894 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 895 // flag, in case this method triggers classloading which will call into Java. 896 UnlockFlagSaver fs(thread); 897 898 assert(ProfileInterpreter, "must be profiling interpreter"); 899 frame fr = thread->last_frame(); 900 assert(fr.is_interpreted_frame(), "must come from interpreter"); 901 methodHandle method(thread, fr.interpreter_frame_method()); 902 methodOopDesc::build_interpreter_method_data(method, THREAD); 903 if (HAS_PENDING_EXCEPTION) { 904 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 905 CLEAR_PENDING_EXCEPTION; 906 // and fall through... 907 } 908IRT_END 909 910 911#ifdef ASSERT 912IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) 913 assert(ProfileInterpreter, "must be profiling interpreter"); 914 915 methodDataOop mdo = method->method_data(); 916 assert(mdo != NULL, "must not be null"); 917 918 int bci = method->bci_from(bcp); 919 920 address mdp2 = mdo->bci_to_dp(bci); 921 if (mdp != mdp2) { 922 ResourceMark rm; 923 ResetNoHandleMark rnm; // In a LEAF entry. 924 HandleMark hm; 925 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 926 int current_di = mdo->dp_to_di(mdp); 927 int expected_di = mdo->dp_to_di(mdp2); 928 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 929 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 930 int approx_bci = -1; 931 if (current_di >= 0) { 932 approx_bci = mdo->data_at(current_di)->bci(); 933 } 934 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 935 mdo->print_on(tty); 936 method->print_codes(); 937 } 938 assert(mdp == mdp2, "wrong mdp"); 939IRT_END 940#endif // ASSERT 941 942IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 943 assert(ProfileInterpreter, "must be profiling interpreter"); 944 ResourceMark rm(thread); 945 HandleMark hm(thread); 946 frame fr = thread->last_frame(); 947 assert(fr.is_interpreted_frame(), "must come from interpreter"); 948 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); 949 950 // Grab a lock to ensure atomic access to setting the return bci and 951 // the displacement. This can block and GC, invalidating all naked oops. 952 MutexLocker ml(RetData_lock); 953 954 // ProfileData is essentially a wrapper around a derived oop, so we 955 // need to take the lock before making any ProfileData structures. 956 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 957 RetData* rdata = data->as_RetData(); 958 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 959 fr.interpreter_frame_set_mdp(new_mdp); 960IRT_END 961 962 963IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 964 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 965 // stack traversal automatically takes care of preserving arguments for invoke, so 966 // this is no longer needed. 967 968 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 969 // if this is called during a safepoint 970 971 if (JvmtiExport::should_post_single_step()) { 972 // We are called during regular safepoints and when the VM is 973 // single stepping. If any thread is marked for single stepping, 974 // then we may have JVMTI work to do. 975 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 976 } 977IRT_END 978 979IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 980ConstantPoolCacheEntry *cp_entry)) 981 982 // check the access_flags for the field in the klass 983 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); 984 typeArrayOop fields = ik->fields(); 985 int index = cp_entry->field_index(); 986 assert(index < fields->length(), "holders field index is out of range"); 987 // bail out if field accesses are not watched 988 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 989 990 switch(cp_entry->flag_state()) { 991 case btos: // fall through 992 case ctos: // fall through 993 case stos: // fall through 994 case itos: // fall through 995 case ftos: // fall through 996 case ltos: // fall through 997 case dtos: // fall through 998 case atos: break; 999 default: ShouldNotReachHere(); return; 1000 } 1001 bool is_static = (obj == NULL); 1002 HandleMark hm(thread); 1003 1004 Handle h_obj; 1005 if (!is_static) { 1006 // non-static field accessors have an object, but we need a handle 1007 h_obj = Handle(thread, obj); 1008 } 1009 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); 1010 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); 1011 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1012IRT_END 1013 1014IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1015 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1016 1017 klassOop k = (klassOop)cp_entry->f1(); 1018 1019 // check the access_flags for the field in the klass 1020 instanceKlass* ik = instanceKlass::cast(k); 1021 typeArrayOop fields = ik->fields(); 1022 int index = cp_entry->field_index(); 1023 assert(index < fields->length(), "holders field index is out of range"); 1024 // bail out if field modifications are not watched 1025 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1026 1027 char sig_type = '\0'; 1028 1029 switch(cp_entry->flag_state()) { 1030 case btos: sig_type = 'Z'; break; 1031 case ctos: sig_type = 'C'; break; 1032 case stos: sig_type = 'S'; break; 1033 case itos: sig_type = 'I'; break; 1034 case ftos: sig_type = 'F'; break; 1035 case atos: sig_type = 'L'; break; 1036 case ltos: sig_type = 'J'; break; 1037 case dtos: sig_type = 'D'; break; 1038 default: ShouldNotReachHere(); return; 1039 } 1040 bool is_static = (obj == NULL); 1041 1042 HandleMark hm(thread); 1043 instanceKlassHandle h_klass(thread, k); 1044 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); 1045 jvalue fvalue; 1046#ifdef _LP64 1047 fvalue = *value; 1048#else 1049 // Long/double values are stored unaligned and also noncontiguously with 1050 // tagged stacks. We can't just do a simple assignment even in the non- 1051 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1052 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1053 // We assume that the two halves of longs/doubles are stored in interpreter 1054 // stack slots in platform-endian order. 1055 jlong_accessor u; 1056 jint* newval = (jint*)value; 1057 u.words[0] = newval[0]; 1058 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1059 fvalue.j = u.long_value; 1060#endif // _LP64 1061 1062 Handle h_obj; 1063 if (!is_static) { 1064 // non-static field accessors have an object, but we need a handle 1065 h_obj = Handle(thread, obj); 1066 } 1067 1068 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1069 fid, sig_type, &fvalue); 1070IRT_END 1071 1072IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1073 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1074IRT_END 1075 1076 1077IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1078 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1079IRT_END 1080 1081IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1082{ 1083 return (Interpreter::contains(pc) ? 1 : 0); 1084} 1085IRT_END 1086 1087 1088// Implementation of SignatureHandlerLibrary 1089 1090address SignatureHandlerLibrary::set_handler_blob() { 1091 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1092 if (handler_blob == NULL) { 1093 return NULL; 1094 } 1095 address handler = handler_blob->code_begin(); 1096 _handler_blob = handler_blob; 1097 _handler = handler; 1098 return handler; 1099} 1100 1101void SignatureHandlerLibrary::initialize() { 1102 if (_fingerprints != NULL) { 1103 return; 1104 } 1105 if (set_handler_blob() == NULL) { 1106 vm_exit_out_of_memory(blob_size, "native signature handlers"); 1107 } 1108 1109 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1110 SignatureHandlerLibrary::buffer_size); 1111 _buffer = bb->code_begin(); 1112 1113 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); 1114 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); 1115} 1116 1117address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1118 address handler = _handler; 1119 int insts_size = buffer->pure_insts_size(); 1120 if (handler + insts_size > _handler_blob->code_end()) { 1121 // get a new handler blob 1122 handler = set_handler_blob(); 1123 } 1124 if (handler != NULL) { 1125 memcpy(handler, buffer->insts_begin(), insts_size); 1126 pd_set_handler(handler); 1127 ICache::invalidate_range(handler, insts_size); 1128 _handler = handler + insts_size; 1129 } 1130 return handler; 1131} 1132 1133void SignatureHandlerLibrary::add(methodHandle method) { 1134 if (method->signature_handler() == NULL) { 1135 // use slow signature handler if we can't do better 1136 int handler_index = -1; 1137 // check if we can use customized (fast) signature handler 1138 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1139 // use customized signature handler 1140 MutexLocker mu(SignatureHandlerLibrary_lock); 1141 // make sure data structure is initialized 1142 initialize(); 1143 // lookup method signature's fingerprint 1144 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1145 handler_index = _fingerprints->find(fingerprint); 1146 // create handler if necessary 1147 if (handler_index < 0) { 1148 ResourceMark rm; 1149 ptrdiff_t align_offset = (address) 1150 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1151 CodeBuffer buffer((address)(_buffer + align_offset), 1152 SignatureHandlerLibrary::buffer_size - align_offset); 1153 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1154 // copy into code heap 1155 address handler = set_handler(&buffer); 1156 if (handler == NULL) { 1157 // use slow signature handler 1158 } else { 1159 // debugging suppport 1160 if (PrintSignatureHandlers) { 1161 tty->cr(); 1162 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1163 _handlers->length(), 1164 (method->is_static() ? "static" : "receiver"), 1165 method->name_and_sig_as_C_string(), 1166 fingerprint, 1167 buffer.insts_size()); 1168 Disassembler::decode(handler, handler + buffer.insts_size()); 1169#ifndef PRODUCT 1170 tty->print_cr(" --- associated result handler ---"); 1171 address rh_begin = Interpreter::result_handler(method()->result_type()); 1172 address rh_end = rh_begin; 1173 while (*(int*)rh_end != 0) { 1174 rh_end += sizeof(int); 1175 } 1176 Disassembler::decode(rh_begin, rh_end); 1177#endif 1178 } 1179 // add handler to library 1180 _fingerprints->append(fingerprint); 1181 _handlers->append(handler); 1182 // set handler index 1183 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1184 handler_index = _fingerprints->length() - 1; 1185 } 1186 } 1187 } else { 1188 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1189 } 1190 if (handler_index < 0) { 1191 // use generic signature handler 1192 method->set_signature_handler(Interpreter::slow_signature_handler()); 1193 } else { 1194 // set handler 1195 method->set_signature_handler(_handlers->at(handler_index)); 1196 } 1197 } 1198#ifdef ASSERT 1199 int handler_index, fingerprint_index; 1200 { 1201 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1202 // in any way if accessed from multiple threads. To avoid races with another 1203 // thread which may change the arrays in the above, mutex protected block, we 1204 // have to protect this read access here with the same mutex as well! 1205 MutexLocker mu(SignatureHandlerLibrary_lock); 1206 handler_index = _handlers->find(method->signature_handler()); 1207 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1208 } 1209 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1210 handler_index == fingerprint_index, "sanity check"); 1211#endif 1212} 1213 1214 1215BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1216address SignatureHandlerLibrary::_handler = NULL; 1217GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1218GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1219address SignatureHandlerLibrary::_buffer = NULL; 1220 1221 1222IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) 1223 methodHandle m(thread, method); 1224 assert(m->is_native(), "sanity check"); 1225 // lookup native function entry point if it doesn't exist 1226 bool in_base_library; 1227 if (!m->has_native_function()) { 1228 NativeLookup::lookup(m, in_base_library, CHECK); 1229 } 1230 // make sure signature handler is installed 1231 SignatureHandlerLibrary::add(m); 1232 // The interpreter entry point checks the signature handler first, 1233 // before trying to fetch the native entry point and klass mirror. 1234 // We must set the signature handler last, so that multiple processors 1235 // preparing the same method will be sure to see non-null entry & mirror. 1236IRT_END 1237 1238#if defined(IA32) || defined(AMD64) 1239IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1240 if (src_address == dest_address) { 1241 return; 1242 } 1243 ResetNoHandleMark rnm; // In a LEAF entry. 1244 HandleMark hm; 1245 ResourceMark rm; 1246 frame fr = thread->last_frame(); 1247 assert(fr.is_interpreted_frame(), ""); 1248 jint bci = fr.interpreter_frame_bci(); 1249 methodHandle mh(thread, fr.interpreter_frame_method()); 1250 Bytecode_invoke invoke(mh, bci); 1251 ArgumentSizeComputer asc(invoke.signature()); 1252 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1253 Copy::conjoint_jbytes(src_address, dest_address, 1254 size_of_arguments * Interpreter::stackElementSize); 1255IRT_END 1256#endif 1257