interpreterRuntime.cpp revision 6760:22b98ab2a69f
1/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/systemDictionary.hpp" 27#include "classfile/vmSymbols.hpp" 28#include "compiler/compileBroker.hpp" 29#include "compiler/disassembler.hpp" 30#include "gc_interface/collectedHeap.hpp" 31#include "interpreter/interpreter.hpp" 32#include "interpreter/interpreterRuntime.hpp" 33#include "interpreter/linkResolver.hpp" 34#include "interpreter/templateTable.hpp" 35#include "memory/oopFactory.hpp" 36#include "memory/universe.inline.hpp" 37#include "oops/constantPool.hpp" 38#include "oops/instanceKlass.hpp" 39#include "oops/methodData.hpp" 40#include "oops/objArrayKlass.hpp" 41#include "oops/oop.inline.hpp" 42#include "oops/symbol.hpp" 43#include "prims/jvmtiExport.hpp" 44#include "prims/nativeLookup.hpp" 45#include "runtime/atomic.inline.hpp" 46#include "runtime/biasedLocking.hpp" 47#include "runtime/compilationPolicy.hpp" 48#include "runtime/deoptimization.hpp" 49#include "runtime/fieldDescriptor.hpp" 50#include "runtime/handles.inline.hpp" 51#include "runtime/icache.hpp" 52#include "runtime/interfaceSupport.hpp" 53#include "runtime/java.hpp" 54#include "runtime/jfieldIDWorkaround.hpp" 55#include "runtime/osThread.hpp" 56#include "runtime/sharedRuntime.hpp" 57#include "runtime/stubRoutines.hpp" 58#include "runtime/synchronizer.hpp" 59#include "runtime/threadCritical.hpp" 60#include "utilities/events.hpp" 61#ifdef COMPILER2 62#include "opto/runtime.hpp" 63#endif 64 65PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 66 67class UnlockFlagSaver { 68 private: 69 JavaThread* _thread; 70 bool _do_not_unlock; 71 public: 72 UnlockFlagSaver(JavaThread* t) { 73 _thread = t; 74 _do_not_unlock = t->do_not_unlock_if_synchronized(); 75 t->set_do_not_unlock_if_synchronized(false); 76 } 77 ~UnlockFlagSaver() { 78 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 79 } 80}; 81 82//------------------------------------------------------------------------------------------------------------------------ 83// State accessors 84 85void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 86 last_frame(thread).interpreter_frame_set_bcp(bcp); 87 if (ProfileInterpreter) { 88 // ProfileTraps uses MDOs independently of ProfileInterpreter. 89 // That is why we must check both ProfileInterpreter and mdo != NULL. 90 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 91 if (mdo != NULL) { 92 NEEDS_CLEANUP; 93 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 94 } 95 } 96} 97 98//------------------------------------------------------------------------------------------------------------------------ 99// Constants 100 101 102IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 103 // access constant pool 104 ConstantPool* pool = method(thread)->constants(); 105 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 106 constantTag tag = pool->tag_at(index); 107 108 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 109 Klass* klass = pool->klass_at(index, CHECK); 110 oop java_class = klass->java_mirror(); 111 thread->set_vm_result(java_class); 112IRT_END 113 114IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 115 assert(bytecode == Bytecodes::_fast_aldc || 116 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 117 ResourceMark rm(thread); 118 methodHandle m (thread, method(thread)); 119 Bytecode_loadconstant ldc(m, bci(thread)); 120 oop result = ldc.resolve_constant(CHECK); 121#ifdef ASSERT 122 { 123 // The bytecode wrappers aren't GC-safe so construct a new one 124 Bytecode_loadconstant ldc2(m, bci(thread)); 125 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 126 assert(result == coop, "expected result for assembly code"); 127 } 128#endif 129 thread->set_vm_result(result); 130} 131IRT_END 132 133 134//------------------------------------------------------------------------------------------------------------------------ 135// Allocation 136 137IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 138 Klass* k_oop = pool->klass_at(index, CHECK); 139 instanceKlassHandle klass (THREAD, k_oop); 140 141 // Make sure we are not instantiating an abstract klass 142 klass->check_valid_for_instantiation(true, CHECK); 143 144 // Make sure klass is initialized 145 klass->initialize(CHECK); 146 147 // At this point the class may not be fully initialized 148 // because of recursive initialization. If it is fully 149 // initialized & has_finalized is not set, we rewrite 150 // it into its fast version (Note: no locking is needed 151 // here since this is an atomic byte write and can be 152 // done more than once). 153 // 154 // Note: In case of classes with has_finalized we don't 155 // rewrite since that saves us an extra check in 156 // the fast version which then would call the 157 // slow version anyway (and do a call back into 158 // Java). 159 // If we have a breakpoint, then we don't rewrite 160 // because the _breakpoint bytecode would be lost. 161 oop obj = klass->allocate_instance(CHECK); 162 thread->set_vm_result(obj); 163IRT_END 164 165 166IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 167 oop obj = oopFactory::new_typeArray(type, size, CHECK); 168 thread->set_vm_result(obj); 169IRT_END 170 171 172IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 173 // Note: no oopHandle for pool & klass needed since they are not used 174 // anymore after new_objArray() and no GC can happen before. 175 // (This may have to change if this code changes!) 176 Klass* klass = pool->klass_at(index, CHECK); 177 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 178 thread->set_vm_result(obj); 179IRT_END 180 181 182IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 183 // We may want to pass in more arguments - could make this slightly faster 184 ConstantPool* constants = method(thread)->constants(); 185 int i = get_index_u2(thread, Bytecodes::_multianewarray); 186 Klass* klass = constants->klass_at(i, CHECK); 187 int nof_dims = number_of_dimensions(thread); 188 assert(klass->is_klass(), "not a class"); 189 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 190 191 // We must create an array of jints to pass to multi_allocate. 192 ResourceMark rm(thread); 193 const int small_dims = 10; 194 jint dim_array[small_dims]; 195 jint *dims = &dim_array[0]; 196 if (nof_dims > small_dims) { 197 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 198 } 199 for (int index = 0; index < nof_dims; index++) { 200 // offset from first_size_address is addressed as local[index] 201 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 202 dims[index] = first_size_address[n]; 203 } 204 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 205 thread->set_vm_result(obj); 206IRT_END 207 208 209IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 210 assert(obj->is_oop(), "must be a valid oop"); 211 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 212 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 213IRT_END 214 215 216// Quicken instance-of and check-cast bytecodes 217IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 218 // Force resolving; quicken the bytecode 219 int which = get_index_u2(thread, Bytecodes::_checkcast); 220 ConstantPool* cpool = method(thread)->constants(); 221 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 222 // program we might have seen an unquick'd bytecode in the interpreter but have another 223 // thread quicken the bytecode before we get here. 224 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 225 Klass* klass = cpool->klass_at(which, CHECK); 226 thread->set_vm_result_2(klass); 227IRT_END 228 229 230//------------------------------------------------------------------------------------------------------------------------ 231// Exceptions 232 233void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 234 methodHandle trap_method, int trap_bci, TRAPS) { 235 if (trap_method.not_null()) { 236 MethodData* trap_mdo = trap_method->method_data(); 237 if (trap_mdo == NULL) { 238 Method::build_interpreter_method_data(trap_method, THREAD); 239 if (HAS_PENDING_EXCEPTION) { 240 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 241 "we expect only an OOM error here"); 242 CLEAR_PENDING_EXCEPTION; 243 } 244 trap_mdo = trap_method->method_data(); 245 // and fall through... 246 } 247 if (trap_mdo != NULL) { 248 // Update per-method count of trap events. The interpreter 249 // is updating the MDO to simulate the effect of compiler traps. 250 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 251 } 252 } 253} 254 255// Assume the compiler is (or will be) interested in this event. 256// If necessary, create an MDO to hold the information, and record it. 257void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 258 assert(ProfileTraps, "call me only if profiling"); 259 methodHandle trap_method(thread, method(thread)); 260 int trap_bci = trap_method->bci_from(bcp(thread)); 261 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 262} 263 264#ifdef CC_INTERP 265// As legacy note_trap, but we have more arguments. 266IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 267 methodHandle trap_method(method); 268 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 269IRT_END 270 271// Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 272// for each exception. 273void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 274 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 275void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 276 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 277void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 278 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 279void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 280 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 281void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 282 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 283#endif // CC_INTERP 284 285 286static Handle get_preinitialized_exception(Klass* k, TRAPS) { 287 // get klass 288 InstanceKlass* klass = InstanceKlass::cast(k); 289 assert(klass->is_initialized(), 290 "this klass should have been initialized during VM initialization"); 291 // create instance - do not call constructor since we may have no 292 // (java) stack space left (should assert constructor is empty) 293 Handle exception; 294 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 295 exception = Handle(THREAD, exception_oop); 296 if (StackTraceInThrowable) { 297 java_lang_Throwable::fill_in_stack_trace(exception); 298 } 299 return exception; 300} 301 302// Special handling for stack overflow: since we don't have any (java) stack 303// space left we use the pre-allocated & pre-initialized StackOverflowError 304// klass to create an stack overflow error instance. We do not call its 305// constructor for the same reason (it is empty, anyway). 306IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 307 Handle exception = get_preinitialized_exception( 308 SystemDictionary::StackOverflowError_klass(), 309 CHECK); 310 THROW_HANDLE(exception); 311IRT_END 312 313 314IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 315 // lookup exception klass 316 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 317 if (ProfileTraps) { 318 if (s == vmSymbols::java_lang_ArithmeticException()) { 319 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 320 } else if (s == vmSymbols::java_lang_NullPointerException()) { 321 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 322 } 323 } 324 // create exception 325 Handle exception = Exceptions::new_exception(thread, s, message); 326 thread->set_vm_result(exception()); 327IRT_END 328 329 330IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 331 ResourceMark rm(thread); 332 const char* klass_name = obj->klass()->external_name(); 333 // lookup exception klass 334 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 335 if (ProfileTraps) { 336 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 337 } 338 // create exception, with klass name as detail message 339 Handle exception = Exceptions::new_exception(thread, s, klass_name); 340 thread->set_vm_result(exception()); 341IRT_END 342 343 344IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 345 char message[jintAsStringSize]; 346 // lookup exception klass 347 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 348 if (ProfileTraps) { 349 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 350 } 351 // create exception 352 sprintf(message, "%d", index); 353 THROW_MSG(s, message); 354IRT_END 355 356IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 357 JavaThread* thread, oopDesc* obj)) 358 359 ResourceMark rm(thread); 360 char* message = SharedRuntime::generate_class_cast_message( 361 thread, obj->klass()->external_name()); 362 363 if (ProfileTraps) { 364 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 365 } 366 367 // create exception 368 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 369IRT_END 370 371// exception_handler_for_exception(...) returns the continuation address, 372// the exception oop (via TLS) and sets the bci/bcp for the continuation. 373// The exception oop is returned to make sure it is preserved over GC (it 374// is only on the stack if the exception was thrown explicitly via athrow). 375// During this operation, the expression stack contains the values for the 376// bci where the exception happened. If the exception was propagated back 377// from a call, the expression stack contains the values for the bci at the 378// invoke w/o arguments (i.e., as if one were inside the call). 379IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 380 381 Handle h_exception(thread, exception); 382 methodHandle h_method (thread, method(thread)); 383 constantPoolHandle h_constants(thread, h_method->constants()); 384 bool should_repeat; 385 int handler_bci; 386 int current_bci = bci(thread); 387 388 // Need to do this check first since when _do_not_unlock_if_synchronized 389 // is set, we don't want to trigger any classloading which may make calls 390 // into java, or surprisingly find a matching exception handler for bci 0 391 // since at this moment the method hasn't been "officially" entered yet. 392 if (thread->do_not_unlock_if_synchronized()) { 393 ResourceMark rm; 394 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 395 thread->set_vm_result(exception); 396#ifdef CC_INTERP 397 return (address) -1; 398#else 399 return Interpreter::remove_activation_entry(); 400#endif 401 } 402 403 do { 404 should_repeat = false; 405 406 // assertions 407#ifdef ASSERT 408 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 409 assert(h_exception->is_oop(), "just checking"); 410 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 411 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 412 if (ExitVMOnVerifyError) vm_exit(-1); 413 ShouldNotReachHere(); 414 } 415#endif 416 417 // tracing 418 if (TraceExceptions) { 419 ttyLocker ttyl; 420 ResourceMark rm(thread); 421 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 422 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 423 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 424 } 425// Don't go paging in something which won't be used. 426// else if (extable->length() == 0) { 427// // disabled for now - interpreter is not using shortcut yet 428// // (shortcut is not to call runtime if we have no exception handlers) 429// // warning("performance bug: should not call runtime if method has no exception handlers"); 430// } 431 // for AbortVMOnException flag 432 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 433 434 // exception handler lookup 435 KlassHandle h_klass(THREAD, h_exception->klass()); 436 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 437 if (HAS_PENDING_EXCEPTION) { 438 // We threw an exception while trying to find the exception handler. 439 // Transfer the new exception to the exception handle which will 440 // be set into thread local storage, and do another lookup for an 441 // exception handler for this exception, this time starting at the 442 // BCI of the exception handler which caused the exception to be 443 // thrown (bug 4307310). 444 h_exception = Handle(THREAD, PENDING_EXCEPTION); 445 CLEAR_PENDING_EXCEPTION; 446 if (handler_bci >= 0) { 447 current_bci = handler_bci; 448 should_repeat = true; 449 } 450 } 451 } while (should_repeat == true); 452 453 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 454 // time throw or a stack unwinding throw and accordingly notify the debugger 455 if (JvmtiExport::can_post_on_exceptions()) { 456 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 457 } 458 459#ifdef CC_INTERP 460 address continuation = (address)(intptr_t) handler_bci; 461#else 462 address continuation = NULL; 463#endif 464 address handler_pc = NULL; 465 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 466 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 467 // handler in this method, or (b) after a stack overflow there is not yet 468 // enough stack space available to reprotect the stack. 469#ifndef CC_INTERP 470 continuation = Interpreter::remove_activation_entry(); 471#endif 472 // Count this for compilation purposes 473 h_method->interpreter_throwout_increment(THREAD); 474 } else { 475 // handler in this method => change bci/bcp to handler bci/bcp and continue there 476 handler_pc = h_method->code_base() + handler_bci; 477#ifndef CC_INTERP 478 set_bcp_and_mdp(handler_pc, thread); 479 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 480#endif 481 } 482 // notify debugger of an exception catch 483 // (this is good for exceptions caught in native methods as well) 484 if (JvmtiExport::can_post_on_exceptions()) { 485 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 486 } 487 488 thread->set_vm_result(h_exception()); 489 return continuation; 490IRT_END 491 492 493IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 494 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 495 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 496IRT_END 497 498 499IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 500 THROW(vmSymbols::java_lang_AbstractMethodError()); 501IRT_END 502 503 504IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 505 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 506IRT_END 507 508 509//------------------------------------------------------------------------------------------------------------------------ 510// Fields 511// 512 513IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 514 // resolve field 515 fieldDescriptor info; 516 constantPoolHandle pool(thread, method(thread)->constants()); 517 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); 518 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 519 520 { 521 JvmtiHideSingleStepping jhss(thread); 522 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 523 bytecode, CHECK); 524 } // end JvmtiHideSingleStepping 525 526 // check if link resolution caused cpCache to be updated 527 if (already_resolved(thread)) return; 528 529 // compute auxiliary field attributes 530 TosState state = as_TosState(info.field_type()); 531 532 // We need to delay resolving put instructions on final fields 533 // until we actually invoke one. This is required so we throw 534 // exceptions at the correct place. If we do not resolve completely 535 // in the current pass, leaving the put_code set to zero will 536 // cause the next put instruction to reresolve. 537 Bytecodes::Code put_code = (Bytecodes::Code)0; 538 539 // We also need to delay resolving getstatic instructions until the 540 // class is intitialized. This is required so that access to the static 541 // field will call the initialization function every time until the class 542 // is completely initialized ala. in 2.17.5 in JVM Specification. 543 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 544 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 545 !klass->is_initialized()); 546 Bytecodes::Code get_code = (Bytecodes::Code)0; 547 548 if (!uninitialized_static) { 549 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 550 if (is_put || !info.access_flags().is_final()) { 551 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 552 } 553 } 554 555 cache_entry(thread)->set_field( 556 get_code, 557 put_code, 558 info.field_holder(), 559 info.index(), 560 info.offset(), 561 state, 562 info.access_flags().is_final(), 563 info.access_flags().is_volatile(), 564 pool->pool_holder() 565 ); 566IRT_END 567 568 569//------------------------------------------------------------------------------------------------------------------------ 570// Synchronization 571// 572// The interpreter's synchronization code is factored out so that it can 573// be shared by method invocation and synchronized blocks. 574//%note synchronization_3 575 576//%note monitor_1 577IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 578#ifdef ASSERT 579 thread->last_frame().interpreter_frame_verify_monitor(elem); 580#endif 581 if (PrintBiasedLockingStatistics) { 582 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 583 } 584 Handle h_obj(thread, elem->obj()); 585 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 586 "must be NULL or an object"); 587 if (UseBiasedLocking) { 588 // Retry fast entry if bias is revoked to avoid unnecessary inflation 589 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 590 } else { 591 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 592 } 593 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 594 "must be NULL or an object"); 595#ifdef ASSERT 596 thread->last_frame().interpreter_frame_verify_monitor(elem); 597#endif 598IRT_END 599 600 601//%note monitor_1 602IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 603#ifdef ASSERT 604 thread->last_frame().interpreter_frame_verify_monitor(elem); 605#endif 606 Handle h_obj(thread, elem->obj()); 607 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 608 "must be NULL or an object"); 609 if (elem == NULL || h_obj()->is_unlocked()) { 610 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 611 } 612 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 613 // Free entry. This must be done here, since a pending exception might be installed on 614 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 615 elem->set_obj(NULL); 616#ifdef ASSERT 617 thread->last_frame().interpreter_frame_verify_monitor(elem); 618#endif 619IRT_END 620 621 622IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 623 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 624IRT_END 625 626 627IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 628 // Returns an illegal exception to install into the current thread. The 629 // pending_exception flag is cleared so normal exception handling does not 630 // trigger. Any current installed exception will be overwritten. This 631 // method will be called during an exception unwind. 632 633 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 634 Handle exception(thread, thread->vm_result()); 635 assert(exception() != NULL, "vm result should be set"); 636 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 637 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 638 exception = get_preinitialized_exception( 639 SystemDictionary::IllegalMonitorStateException_klass(), 640 CATCH); 641 } 642 thread->set_vm_result(exception()); 643IRT_END 644 645 646//------------------------------------------------------------------------------------------------------------------------ 647// Invokes 648 649IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 650 return method->orig_bytecode_at(method->bci_from(bcp)); 651IRT_END 652 653IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 654 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 655IRT_END 656 657IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 658 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 659IRT_END 660 661IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { 662 // extract receiver from the outgoing argument list if necessary 663 Handle receiver(thread, NULL); 664 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 665 ResourceMark rm(thread); 666 methodHandle m (thread, method(thread)); 667 Bytecode_invoke call(m, bci(thread)); 668 Symbol* signature = call.signature(); 669 receiver = Handle(thread, 670 thread->last_frame().interpreter_callee_receiver(signature)); 671 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 672 "sanity check"); 673 assert(receiver.is_null() || 674 !Universe::heap()->is_in_reserved(receiver->klass()), 675 "sanity check"); 676 } 677 678 // resolve method 679 CallInfo info; 680 constantPoolHandle pool(thread, method(thread)->constants()); 681 682 { 683 JvmtiHideSingleStepping jhss(thread); 684 LinkResolver::resolve_invoke(info, receiver, pool, 685 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 686 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 687 int retry_count = 0; 688 while (info.resolved_method()->is_old()) { 689 // It is very unlikely that method is redefined more than 100 times 690 // in the middle of resolve. If it is looping here more than 100 times 691 // means then there could be a bug here. 692 guarantee((retry_count++ < 100), 693 "Could not resolve to latest version of redefined method"); 694 // method is redefined in the middle of resolve so re-try. 695 LinkResolver::resolve_invoke(info, receiver, pool, 696 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 697 } 698 } 699 } // end JvmtiHideSingleStepping 700 701 // check if link resolution caused cpCache to be updated 702 if (already_resolved(thread)) return; 703 704 if (bytecode == Bytecodes::_invokeinterface) { 705 if (TraceItables && Verbose) { 706 ResourceMark rm(thread); 707 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 708 } 709 } 710#ifdef ASSERT 711 if (bytecode == Bytecodes::_invokeinterface) { 712 if (info.resolved_method()->method_holder() == 713 SystemDictionary::Object_klass()) { 714 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 715 // (see also CallInfo::set_interface for details) 716 assert(info.call_kind() == CallInfo::vtable_call || 717 info.call_kind() == CallInfo::direct_call, ""); 718 methodHandle rm = info.resolved_method(); 719 assert(rm->is_final() || info.has_vtable_index(), 720 "should have been set already"); 721 } else if (!info.resolved_method()->has_itable_index()) { 722 // Resolved something like CharSequence.toString. Use vtable not itable. 723 assert(info.call_kind() != CallInfo::itable_call, ""); 724 } else { 725 // Setup itable entry 726 assert(info.call_kind() == CallInfo::itable_call, ""); 727 int index = info.resolved_method()->itable_index(); 728 assert(info.itable_index() == index, ""); 729 } 730 } else { 731 assert(info.call_kind() == CallInfo::direct_call || 732 info.call_kind() == CallInfo::vtable_call, ""); 733 } 734#endif 735 switch (info.call_kind()) { 736 case CallInfo::direct_call: 737 cache_entry(thread)->set_direct_call( 738 bytecode, 739 info.resolved_method()); 740 break; 741 case CallInfo::vtable_call: 742 cache_entry(thread)->set_vtable_call( 743 bytecode, 744 info.resolved_method(), 745 info.vtable_index()); 746 break; 747 case CallInfo::itable_call: 748 cache_entry(thread)->set_itable_call( 749 bytecode, 750 info.resolved_method(), 751 info.itable_index()); 752 break; 753 default: ShouldNotReachHere(); 754 } 755} 756IRT_END 757 758 759// First time execution: Resolve symbols, create a permanent MethodType object. 760IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { 761 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 762 763 // resolve method 764 CallInfo info; 765 constantPoolHandle pool(thread, method(thread)->constants()); 766 767 { 768 JvmtiHideSingleStepping jhss(thread); 769 LinkResolver::resolve_invoke(info, Handle(), pool, 770 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 771 } // end JvmtiHideSingleStepping 772 773 cache_entry(thread)->set_method_handle(pool, info); 774} 775IRT_END 776 777 778// First time execution: Resolve symbols, create a permanent CallSite object. 779IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 780 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 781 782 //TO DO: consider passing BCI to Java. 783 // int caller_bci = method(thread)->bci_from(bcp(thread)); 784 785 // resolve method 786 CallInfo info; 787 constantPoolHandle pool(thread, method(thread)->constants()); 788 int index = get_index_u4(thread, bytecode); 789 { 790 JvmtiHideSingleStepping jhss(thread); 791 LinkResolver::resolve_invoke(info, Handle(), pool, 792 index, bytecode, CHECK); 793 } // end JvmtiHideSingleStepping 794 795 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 796 cp_cache_entry->set_dynamic_call(pool, info); 797} 798IRT_END 799 800 801//------------------------------------------------------------------------------------------------------------------------ 802// Miscellaneous 803 804 805nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 806 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 807 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 808 if (branch_bcp != NULL && nm != NULL) { 809 // This was a successful request for an OSR nmethod. Because 810 // frequency_counter_overflow_inner ends with a safepoint check, 811 // nm could have been unloaded so look it up again. It's unsafe 812 // to examine nm directly since it might have been freed and used 813 // for something else. 814 frame fr = thread->last_frame(); 815 Method* method = fr.interpreter_frame_method(); 816 int bci = method->bci_from(fr.interpreter_frame_bcp()); 817 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 818 } 819#ifndef PRODUCT 820 if (TraceOnStackReplacement) { 821 if (nm != NULL) { 822 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 823 nm->print(); 824 } 825 } 826#endif 827 return nm; 828} 829 830IRT_ENTRY(nmethod*, 831 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 832 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 833 // flag, in case this method triggers classloading which will call into Java. 834 UnlockFlagSaver fs(thread); 835 836 frame fr = thread->last_frame(); 837 assert(fr.is_interpreted_frame(), "must come from interpreter"); 838 methodHandle method(thread, fr.interpreter_frame_method()); 839 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 840 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 841 842 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 843 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 844 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 845 846 if (osr_nm != NULL) { 847 // We may need to do on-stack replacement which requires that no 848 // monitors in the activation are biased because their 849 // BasicObjectLocks will need to migrate during OSR. Force 850 // unbiasing of all monitors in the activation now (even though 851 // the OSR nmethod might be invalidated) because we don't have a 852 // safepoint opportunity later once the migration begins. 853 if (UseBiasedLocking) { 854 ResourceMark rm; 855 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 856 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 857 kptr < fr.interpreter_frame_monitor_begin(); 858 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 859 if( kptr->obj() != NULL ) { 860 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 861 } 862 } 863 BiasedLocking::revoke(objects_to_revoke); 864 } 865 } 866 return osr_nm; 867IRT_END 868 869IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 870 assert(ProfileInterpreter, "must be profiling interpreter"); 871 int bci = method->bci_from(cur_bcp); 872 MethodData* mdo = method->method_data(); 873 if (mdo == NULL) return 0; 874 return mdo->bci_to_di(bci); 875IRT_END 876 877IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 878 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 879 // flag, in case this method triggers classloading which will call into Java. 880 UnlockFlagSaver fs(thread); 881 882 assert(ProfileInterpreter, "must be profiling interpreter"); 883 frame fr = thread->last_frame(); 884 assert(fr.is_interpreted_frame(), "must come from interpreter"); 885 methodHandle method(thread, fr.interpreter_frame_method()); 886 Method::build_interpreter_method_data(method, THREAD); 887 if (HAS_PENDING_EXCEPTION) { 888 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 889 CLEAR_PENDING_EXCEPTION; 890 // and fall through... 891 } 892IRT_END 893 894 895#ifdef ASSERT 896IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 897 assert(ProfileInterpreter, "must be profiling interpreter"); 898 899 MethodData* mdo = method->method_data(); 900 assert(mdo != NULL, "must not be null"); 901 902 int bci = method->bci_from(bcp); 903 904 address mdp2 = mdo->bci_to_dp(bci); 905 if (mdp != mdp2) { 906 ResourceMark rm; 907 ResetNoHandleMark rnm; // In a LEAF entry. 908 HandleMark hm; 909 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 910 int current_di = mdo->dp_to_di(mdp); 911 int expected_di = mdo->dp_to_di(mdp2); 912 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 913 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 914 int approx_bci = -1; 915 if (current_di >= 0) { 916 approx_bci = mdo->data_at(current_di)->bci(); 917 } 918 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 919 mdo->print_on(tty); 920 method->print_codes(); 921 } 922 assert(mdp == mdp2, "wrong mdp"); 923IRT_END 924#endif // ASSERT 925 926IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 927 assert(ProfileInterpreter, "must be profiling interpreter"); 928 ResourceMark rm(thread); 929 HandleMark hm(thread); 930 frame fr = thread->last_frame(); 931 assert(fr.is_interpreted_frame(), "must come from interpreter"); 932 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 933 934 // Grab a lock to ensure atomic access to setting the return bci and 935 // the displacement. This can block and GC, invalidating all naked oops. 936 MutexLocker ml(RetData_lock); 937 938 // ProfileData is essentially a wrapper around a derived oop, so we 939 // need to take the lock before making any ProfileData structures. 940 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 941 RetData* rdata = data->as_RetData(); 942 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 943 fr.interpreter_frame_set_mdp(new_mdp); 944IRT_END 945 946IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 947 MethodCounters* mcs = Method::build_method_counters(m, thread); 948 if (HAS_PENDING_EXCEPTION) { 949 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 950 CLEAR_PENDING_EXCEPTION; 951 } 952 return mcs; 953IRT_END 954 955 956IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 957 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 958 // stack traversal automatically takes care of preserving arguments for invoke, so 959 // this is no longer needed. 960 961 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 962 // if this is called during a safepoint 963 964 if (JvmtiExport::should_post_single_step()) { 965 // We are called during regular safepoints and when the VM is 966 // single stepping. If any thread is marked for single stepping, 967 // then we may have JVMTI work to do. 968 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 969 } 970IRT_END 971 972IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 973ConstantPoolCacheEntry *cp_entry)) 974 975 // check the access_flags for the field in the klass 976 977 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 978 int index = cp_entry->field_index(); 979 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 980 981 switch(cp_entry->flag_state()) { 982 case btos: // fall through 983 case ctos: // fall through 984 case stos: // fall through 985 case itos: // fall through 986 case ftos: // fall through 987 case ltos: // fall through 988 case dtos: // fall through 989 case atos: break; 990 default: ShouldNotReachHere(); return; 991 } 992 bool is_static = (obj == NULL); 993 HandleMark hm(thread); 994 995 Handle h_obj; 996 if (!is_static) { 997 // non-static field accessors have an object, but we need a handle 998 h_obj = Handle(thread, obj); 999 } 1000 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1001 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1002 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1003IRT_END 1004 1005IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1006 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1007 1008 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1009 1010 // check the access_flags for the field in the klass 1011 InstanceKlass* ik = InstanceKlass::cast(k); 1012 int index = cp_entry->field_index(); 1013 // bail out if field modifications are not watched 1014 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1015 1016 char sig_type = '\0'; 1017 1018 switch(cp_entry->flag_state()) { 1019 case btos: sig_type = 'Z'; break; 1020 case ctos: sig_type = 'C'; break; 1021 case stos: sig_type = 'S'; break; 1022 case itos: sig_type = 'I'; break; 1023 case ftos: sig_type = 'F'; break; 1024 case atos: sig_type = 'L'; break; 1025 case ltos: sig_type = 'J'; break; 1026 case dtos: sig_type = 'D'; break; 1027 default: ShouldNotReachHere(); return; 1028 } 1029 bool is_static = (obj == NULL); 1030 1031 HandleMark hm(thread); 1032 instanceKlassHandle h_klass(thread, k); 1033 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1034 jvalue fvalue; 1035#ifdef _LP64 1036 fvalue = *value; 1037#else 1038 // Long/double values are stored unaligned and also noncontiguously with 1039 // tagged stacks. We can't just do a simple assignment even in the non- 1040 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1041 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1042 // We assume that the two halves of longs/doubles are stored in interpreter 1043 // stack slots in platform-endian order. 1044 jlong_accessor u; 1045 jint* newval = (jint*)value; 1046 u.words[0] = newval[0]; 1047 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1048 fvalue.j = u.long_value; 1049#endif // _LP64 1050 1051 Handle h_obj; 1052 if (!is_static) { 1053 // non-static field accessors have an object, but we need a handle 1054 h_obj = Handle(thread, obj); 1055 } 1056 1057 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1058 fid, sig_type, &fvalue); 1059IRT_END 1060 1061IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1062 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1063IRT_END 1064 1065 1066IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1067 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1068IRT_END 1069 1070IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1071{ 1072 return (Interpreter::contains(pc) ? 1 : 0); 1073} 1074IRT_END 1075 1076 1077// Implementation of SignatureHandlerLibrary 1078 1079address SignatureHandlerLibrary::set_handler_blob() { 1080 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1081 if (handler_blob == NULL) { 1082 return NULL; 1083 } 1084 address handler = handler_blob->code_begin(); 1085 _handler_blob = handler_blob; 1086 _handler = handler; 1087 return handler; 1088} 1089 1090void SignatureHandlerLibrary::initialize() { 1091 if (_fingerprints != NULL) { 1092 return; 1093 } 1094 if (set_handler_blob() == NULL) { 1095 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1096 } 1097 1098 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1099 SignatureHandlerLibrary::buffer_size); 1100 _buffer = bb->code_begin(); 1101 1102 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1103 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1104} 1105 1106address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1107 address handler = _handler; 1108 int insts_size = buffer->pure_insts_size(); 1109 if (handler + insts_size > _handler_blob->code_end()) { 1110 // get a new handler blob 1111 handler = set_handler_blob(); 1112 } 1113 if (handler != NULL) { 1114 memcpy(handler, buffer->insts_begin(), insts_size); 1115 pd_set_handler(handler); 1116 ICache::invalidate_range(handler, insts_size); 1117 _handler = handler + insts_size; 1118 } 1119 return handler; 1120} 1121 1122void SignatureHandlerLibrary::add(methodHandle method) { 1123 if (method->signature_handler() == NULL) { 1124 // use slow signature handler if we can't do better 1125 int handler_index = -1; 1126 // check if we can use customized (fast) signature handler 1127 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1128 // use customized signature handler 1129 MutexLocker mu(SignatureHandlerLibrary_lock); 1130 // make sure data structure is initialized 1131 initialize(); 1132 // lookup method signature's fingerprint 1133 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1134 handler_index = _fingerprints->find(fingerprint); 1135 // create handler if necessary 1136 if (handler_index < 0) { 1137 ResourceMark rm; 1138 ptrdiff_t align_offset = (address) 1139 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1140 CodeBuffer buffer((address)(_buffer + align_offset), 1141 SignatureHandlerLibrary::buffer_size - align_offset); 1142 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1143 // copy into code heap 1144 address handler = set_handler(&buffer); 1145 if (handler == NULL) { 1146 // use slow signature handler 1147 } else { 1148 // debugging suppport 1149 if (PrintSignatureHandlers) { 1150 tty->cr(); 1151 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1152 _handlers->length(), 1153 (method->is_static() ? "static" : "receiver"), 1154 method->name_and_sig_as_C_string(), 1155 fingerprint, 1156 buffer.insts_size()); 1157 Disassembler::decode(handler, handler + buffer.insts_size()); 1158#ifndef PRODUCT 1159 tty->print_cr(" --- associated result handler ---"); 1160 address rh_begin = Interpreter::result_handler(method()->result_type()); 1161 address rh_end = rh_begin; 1162 while (*(int*)rh_end != 0) { 1163 rh_end += sizeof(int); 1164 } 1165 Disassembler::decode(rh_begin, rh_end); 1166#endif 1167 } 1168 // add handler to library 1169 _fingerprints->append(fingerprint); 1170 _handlers->append(handler); 1171 // set handler index 1172 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1173 handler_index = _fingerprints->length() - 1; 1174 } 1175 } 1176 // Set handler under SignatureHandlerLibrary_lock 1177 if (handler_index < 0) { 1178 // use generic signature handler 1179 method->set_signature_handler(Interpreter::slow_signature_handler()); 1180 } else { 1181 // set handler 1182 method->set_signature_handler(_handlers->at(handler_index)); 1183 } 1184 } else { 1185 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1186 // use generic signature handler 1187 method->set_signature_handler(Interpreter::slow_signature_handler()); 1188 } 1189 } 1190#ifdef ASSERT 1191 int handler_index = -1; 1192 int fingerprint_index = -2; 1193 { 1194 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1195 // in any way if accessed from multiple threads. To avoid races with another 1196 // thread which may change the arrays in the above, mutex protected block, we 1197 // have to protect this read access here with the same mutex as well! 1198 MutexLocker mu(SignatureHandlerLibrary_lock); 1199 if (_handlers != NULL) { 1200 handler_index = _handlers->find(method->signature_handler()); 1201 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1202 } 1203 } 1204 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1205 handler_index == fingerprint_index, "sanity check"); 1206#endif // ASSERT 1207} 1208 1209 1210BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1211address SignatureHandlerLibrary::_handler = NULL; 1212GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1213GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1214address SignatureHandlerLibrary::_buffer = NULL; 1215 1216 1217IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1218 methodHandle m(thread, method); 1219 assert(m->is_native(), "sanity check"); 1220 // lookup native function entry point if it doesn't exist 1221 bool in_base_library; 1222 if (!m->has_native_function()) { 1223 NativeLookup::lookup(m, in_base_library, CHECK); 1224 } 1225 // make sure signature handler is installed 1226 SignatureHandlerLibrary::add(m); 1227 // The interpreter entry point checks the signature handler first, 1228 // before trying to fetch the native entry point and klass mirror. 1229 // We must set the signature handler last, so that multiple processors 1230 // preparing the same method will be sure to see non-null entry & mirror. 1231IRT_END 1232 1233#if defined(IA32) || defined(AMD64) || defined(ARM) 1234IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1235 if (src_address == dest_address) { 1236 return; 1237 } 1238 ResetNoHandleMark rnm; // In a LEAF entry. 1239 HandleMark hm; 1240 ResourceMark rm; 1241 frame fr = thread->last_frame(); 1242 assert(fr.is_interpreted_frame(), ""); 1243 jint bci = fr.interpreter_frame_bci(); 1244 methodHandle mh(thread, fr.interpreter_frame_method()); 1245 Bytecode_invoke invoke(mh, bci); 1246 ArgumentSizeComputer asc(invoke.signature()); 1247 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1248 Copy::conjoint_jbytes(src_address, dest_address, 1249 size_of_arguments * Interpreter::stackElementSize); 1250IRT_END 1251#endif 1252 1253#if INCLUDE_JVMTI 1254// This is a support of the JVMTI PopFrame interface. 1255// Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1256// and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1257// The member_name argument is a saved reference (in local#0) to the member_name. 1258// For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1259// FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1260IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1261 Method* method, address bcp)) 1262 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1263 if (code != Bytecodes::_invokestatic) { 1264 return; 1265 } 1266 ConstantPool* cpool = method->constants(); 1267 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1268 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1269 Symbol* mname = cpool->name_ref_at(cp_index); 1270 1271 if (MethodHandles::has_member_arg(cname, mname)) { 1272 oop member_name_oop = (oop) member_name; 1273 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1274 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1275 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1276 } 1277 thread->set_vm_result(member_name_oop); 1278 } 1279IRT_END 1280#endif // INCLUDE_JVMTI 1281