interpreterRuntime.cpp revision 6501:39e7fbc6d865
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/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 78PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 79 80class UnlockFlagSaver { 81 private: 82 JavaThread* _thread; 83 bool _do_not_unlock; 84 public: 85 UnlockFlagSaver(JavaThread* t) { 86 _thread = t; 87 _do_not_unlock = t->do_not_unlock_if_synchronized(); 88 t->set_do_not_unlock_if_synchronized(false); 89 } 90 ~UnlockFlagSaver() { 91 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 92 } 93}; 94 95//------------------------------------------------------------------------------------------------------------------------ 96// State accessors 97 98void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 99 last_frame(thread).interpreter_frame_set_bcp(bcp); 100 if (ProfileInterpreter) { 101 // ProfileTraps uses MDOs independently of ProfileInterpreter. 102 // That is why we must check both ProfileInterpreter and mdo != NULL. 103 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 104 if (mdo != NULL) { 105 NEEDS_CLEANUP; 106 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 107 } 108 } 109} 110 111//------------------------------------------------------------------------------------------------------------------------ 112// Constants 113 114 115IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 116 // access constant pool 117 ConstantPool* pool = method(thread)->constants(); 118 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 119 constantTag tag = pool->tag_at(index); 120 121 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 122 Klass* klass = pool->klass_at(index, CHECK); 123 oop java_class = klass->java_mirror(); 124 thread->set_vm_result(java_class); 125IRT_END 126 127IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 128 assert(bytecode == Bytecodes::_fast_aldc || 129 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 130 ResourceMark rm(thread); 131 methodHandle m (thread, method(thread)); 132 Bytecode_loadconstant ldc(m, bci(thread)); 133 oop result = ldc.resolve_constant(CHECK); 134#ifdef ASSERT 135 { 136 // The bytecode wrappers aren't GC-safe so construct a new one 137 Bytecode_loadconstant ldc2(m, bci(thread)); 138 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 139 assert(result == coop, "expected result for assembly code"); 140 } 141#endif 142 thread->set_vm_result(result); 143} 144IRT_END 145 146 147//------------------------------------------------------------------------------------------------------------------------ 148// Allocation 149 150IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 151 Klass* k_oop = pool->klass_at(index, CHECK); 152 instanceKlassHandle klass (THREAD, k_oop); 153 154 // Make sure we are not instantiating an abstract klass 155 klass->check_valid_for_instantiation(true, CHECK); 156 157 // Make sure klass is initialized 158 klass->initialize(CHECK); 159 160 // At this point the class may not be fully initialized 161 // because of recursive initialization. If it is fully 162 // initialized & has_finalized is not set, we rewrite 163 // it into its fast version (Note: no locking is needed 164 // here since this is an atomic byte write and can be 165 // done more than once). 166 // 167 // Note: In case of classes with has_finalized we don't 168 // rewrite since that saves us an extra check in 169 // the fast version which then would call the 170 // slow version anyway (and do a call back into 171 // Java). 172 // If we have a breakpoint, then we don't rewrite 173 // because the _breakpoint bytecode would be lost. 174 oop obj = klass->allocate_instance(CHECK); 175 thread->set_vm_result(obj); 176IRT_END 177 178 179IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 180 oop obj = oopFactory::new_typeArray(type, size, CHECK); 181 thread->set_vm_result(obj); 182IRT_END 183 184 185IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 186 // Note: no oopHandle for pool & klass needed since they are not used 187 // anymore after new_objArray() and no GC can happen before. 188 // (This may have to change if this code changes!) 189 Klass* klass = pool->klass_at(index, CHECK); 190 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 191 thread->set_vm_result(obj); 192IRT_END 193 194 195IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 196 // We may want to pass in more arguments - could make this slightly faster 197 ConstantPool* constants = method(thread)->constants(); 198 int i = get_index_u2(thread, Bytecodes::_multianewarray); 199 Klass* klass = constants->klass_at(i, CHECK); 200 int nof_dims = number_of_dimensions(thread); 201 assert(klass->is_klass(), "not a class"); 202 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 203 204 // We must create an array of jints to pass to multi_allocate. 205 ResourceMark rm(thread); 206 const int small_dims = 10; 207 jint dim_array[small_dims]; 208 jint *dims = &dim_array[0]; 209 if (nof_dims > small_dims) { 210 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 211 } 212 for (int index = 0; index < nof_dims; index++) { 213 // offset from first_size_address is addressed as local[index] 214 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 215 dims[index] = first_size_address[n]; 216 } 217 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 218 thread->set_vm_result(obj); 219IRT_END 220 221 222IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 223 assert(obj->is_oop(), "must be a valid oop"); 224 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 225 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 226IRT_END 227 228 229// Quicken instance-of and check-cast bytecodes 230IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 231 // Force resolving; quicken the bytecode 232 int which = get_index_u2(thread, Bytecodes::_checkcast); 233 ConstantPool* cpool = method(thread)->constants(); 234 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 235 // program we might have seen an unquick'd bytecode in the interpreter but have another 236 // thread quicken the bytecode before we get here. 237 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 238 Klass* klass = cpool->klass_at(which, CHECK); 239 thread->set_vm_result_2(klass); 240IRT_END 241 242 243//------------------------------------------------------------------------------------------------------------------------ 244// Exceptions 245 246void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 247 methodHandle trap_method, int trap_bci, TRAPS) { 248 if (trap_method.not_null()) { 249 MethodData* trap_mdo = trap_method->method_data(); 250 if (trap_mdo == NULL) { 251 Method::build_interpreter_method_data(trap_method, THREAD); 252 if (HAS_PENDING_EXCEPTION) { 253 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 254 "we expect only an OOM error here"); 255 CLEAR_PENDING_EXCEPTION; 256 } 257 trap_mdo = trap_method->method_data(); 258 // and fall through... 259 } 260 if (trap_mdo != NULL) { 261 // Update per-method count of trap events. The interpreter 262 // is updating the MDO to simulate the effect of compiler traps. 263 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 264 } 265 } 266} 267 268// Assume the compiler is (or will be) interested in this event. 269// If necessary, create an MDO to hold the information, and record it. 270void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 271 assert(ProfileTraps, "call me only if profiling"); 272 methodHandle trap_method(thread, method(thread)); 273 int trap_bci = trap_method->bci_from(bcp(thread)); 274 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 275} 276 277#ifdef CC_INTERP 278// As legacy note_trap, but we have more arguments. 279IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 280 methodHandle trap_method(method); 281 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 282IRT_END 283 284// Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 285// for each exception. 286void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 287 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 288void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 289 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 290void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 291 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 292void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 293 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 294void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 295 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 296#endif // CC_INTERP 297 298 299static Handle get_preinitialized_exception(Klass* k, TRAPS) { 300 // get klass 301 InstanceKlass* klass = InstanceKlass::cast(k); 302 assert(klass->is_initialized(), 303 "this klass should have been initialized during VM initialization"); 304 // create instance - do not call constructor since we may have no 305 // (java) stack space left (should assert constructor is empty) 306 Handle exception; 307 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 308 exception = Handle(THREAD, exception_oop); 309 if (StackTraceInThrowable) { 310 java_lang_Throwable::fill_in_stack_trace(exception); 311 } 312 return exception; 313} 314 315// Special handling for stack overflow: since we don't have any (java) stack 316// space left we use the pre-allocated & pre-initialized StackOverflowError 317// klass to create an stack overflow error instance. We do not call its 318// constructor for the same reason (it is empty, anyway). 319IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 320 Handle exception = get_preinitialized_exception( 321 SystemDictionary::StackOverflowError_klass(), 322 CHECK); 323 THROW_HANDLE(exception); 324IRT_END 325 326 327IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 328 // lookup exception klass 329 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 330 if (ProfileTraps) { 331 if (s == vmSymbols::java_lang_ArithmeticException()) { 332 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 333 } else if (s == vmSymbols::java_lang_NullPointerException()) { 334 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 335 } 336 } 337 // create exception 338 Handle exception = Exceptions::new_exception(thread, s, message); 339 thread->set_vm_result(exception()); 340IRT_END 341 342 343IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 344 ResourceMark rm(thread); 345 const char* klass_name = obj->klass()->external_name(); 346 // lookup exception klass 347 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 348 if (ProfileTraps) { 349 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 350 } 351 // create exception, with klass name as detail message 352 Handle exception = Exceptions::new_exception(thread, s, klass_name); 353 thread->set_vm_result(exception()); 354IRT_END 355 356 357IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 358 char message[jintAsStringSize]; 359 // lookup exception klass 360 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 361 if (ProfileTraps) { 362 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 363 } 364 // create exception 365 sprintf(message, "%d", index); 366 THROW_MSG(s, message); 367IRT_END 368 369IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 370 JavaThread* thread, oopDesc* obj)) 371 372 ResourceMark rm(thread); 373 char* message = SharedRuntime::generate_class_cast_message( 374 thread, obj->klass()->external_name()); 375 376 if (ProfileTraps) { 377 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 378 } 379 380 // create exception 381 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 382IRT_END 383 384// exception_handler_for_exception(...) returns the continuation address, 385// the exception oop (via TLS) and sets the bci/bcp for the continuation. 386// The exception oop is returned to make sure it is preserved over GC (it 387// is only on the stack if the exception was thrown explicitly via athrow). 388// During this operation, the expression stack contains the values for the 389// bci where the exception happened. If the exception was propagated back 390// from a call, the expression stack contains the values for the bci at the 391// invoke w/o arguments (i.e., as if one were inside the call). 392IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 393 394 Handle h_exception(thread, exception); 395 methodHandle h_method (thread, method(thread)); 396 constantPoolHandle h_constants(thread, h_method->constants()); 397 bool should_repeat; 398 int handler_bci; 399 int current_bci = bci(thread); 400 401 // Need to do this check first since when _do_not_unlock_if_synchronized 402 // is set, we don't want to trigger any classloading which may make calls 403 // into java, or surprisingly find a matching exception handler for bci 0 404 // since at this moment the method hasn't been "officially" entered yet. 405 if (thread->do_not_unlock_if_synchronized()) { 406 ResourceMark rm; 407 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 408 thread->set_vm_result(exception); 409#ifdef CC_INTERP 410 return (address) -1; 411#else 412 return Interpreter::remove_activation_entry(); 413#endif 414 } 415 416 do { 417 should_repeat = false; 418 419 // assertions 420#ifdef ASSERT 421 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 422 assert(h_exception->is_oop(), "just checking"); 423 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 424 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 425 if (ExitVMOnVerifyError) vm_exit(-1); 426 ShouldNotReachHere(); 427 } 428#endif 429 430 // tracing 431 if (TraceExceptions) { 432 ttyLocker ttyl; 433 ResourceMark rm(thread); 434 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 435 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 436 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 437 } 438// Don't go paging in something which won't be used. 439// else if (extable->length() == 0) { 440// // disabled for now - interpreter is not using shortcut yet 441// // (shortcut is not to call runtime if we have no exception handlers) 442// // warning("performance bug: should not call runtime if method has no exception handlers"); 443// } 444 // for AbortVMOnException flag 445 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 446 447 // exception handler lookup 448 KlassHandle h_klass(THREAD, h_exception->klass()); 449 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 450 if (HAS_PENDING_EXCEPTION) { 451 // We threw an exception while trying to find the exception handler. 452 // Transfer the new exception to the exception handle which will 453 // be set into thread local storage, and do another lookup for an 454 // exception handler for this exception, this time starting at the 455 // BCI of the exception handler which caused the exception to be 456 // thrown (bug 4307310). 457 h_exception = Handle(THREAD, PENDING_EXCEPTION); 458 CLEAR_PENDING_EXCEPTION; 459 if (handler_bci >= 0) { 460 current_bci = handler_bci; 461 should_repeat = true; 462 } 463 } 464 } while (should_repeat == true); 465 466 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 467 // time throw or a stack unwinding throw and accordingly notify the debugger 468 if (JvmtiExport::can_post_on_exceptions()) { 469 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 470 } 471 472#ifdef CC_INTERP 473 address continuation = (address)(intptr_t) handler_bci; 474#else 475 address continuation = NULL; 476#endif 477 address handler_pc = NULL; 478 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 479 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 480 // handler in this method, or (b) after a stack overflow there is not yet 481 // enough stack space available to reprotect the stack. 482#ifndef CC_INTERP 483 continuation = Interpreter::remove_activation_entry(); 484#endif 485 // Count this for compilation purposes 486 h_method->interpreter_throwout_increment(THREAD); 487 } else { 488 // handler in this method => change bci/bcp to handler bci/bcp and continue there 489 handler_pc = h_method->code_base() + handler_bci; 490#ifndef CC_INTERP 491 set_bcp_and_mdp(handler_pc, thread); 492 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 493#endif 494 } 495 // notify debugger of an exception catch 496 // (this is good for exceptions caught in native methods as well) 497 if (JvmtiExport::can_post_on_exceptions()) { 498 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 499 } 500 501 thread->set_vm_result(h_exception()); 502 return continuation; 503IRT_END 504 505 506IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 507 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 508 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 509IRT_END 510 511 512IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 513 THROW(vmSymbols::java_lang_AbstractMethodError()); 514IRT_END 515 516 517IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 518 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 519IRT_END 520 521 522//------------------------------------------------------------------------------------------------------------------------ 523// Fields 524// 525 526IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 527 // resolve field 528 fieldDescriptor info; 529 constantPoolHandle pool(thread, method(thread)->constants()); 530 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); 531 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 532 533 { 534 JvmtiHideSingleStepping jhss(thread); 535 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 536 bytecode, CHECK); 537 } // end JvmtiHideSingleStepping 538 539 // check if link resolution caused cpCache to be updated 540 if (already_resolved(thread)) return; 541 542 // compute auxiliary field attributes 543 TosState state = as_TosState(info.field_type()); 544 545 // We need to delay resolving put instructions on final fields 546 // until we actually invoke one. This is required so we throw 547 // exceptions at the correct place. If we do not resolve completely 548 // in the current pass, leaving the put_code set to zero will 549 // cause the next put instruction to reresolve. 550 Bytecodes::Code put_code = (Bytecodes::Code)0; 551 552 // We also need to delay resolving getstatic instructions until the 553 // class is intitialized. This is required so that access to the static 554 // field will call the initialization function every time until the class 555 // is completely initialized ala. in 2.17.5 in JVM Specification. 556 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 557 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 558 !klass->is_initialized()); 559 Bytecodes::Code get_code = (Bytecodes::Code)0; 560 561 if (!uninitialized_static) { 562 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 563 if (is_put || !info.access_flags().is_final()) { 564 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 565 } 566 } 567 568 cache_entry(thread)->set_field( 569 get_code, 570 put_code, 571 info.field_holder(), 572 info.index(), 573 info.offset(), 574 state, 575 info.access_flags().is_final(), 576 info.access_flags().is_volatile(), 577 pool->pool_holder() 578 ); 579IRT_END 580 581 582//------------------------------------------------------------------------------------------------------------------------ 583// Synchronization 584// 585// The interpreter's synchronization code is factored out so that it can 586// be shared by method invocation and synchronized blocks. 587//%note synchronization_3 588 589//%note monitor_1 590IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 591#ifdef ASSERT 592 thread->last_frame().interpreter_frame_verify_monitor(elem); 593#endif 594 if (PrintBiasedLockingStatistics) { 595 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 596 } 597 Handle h_obj(thread, elem->obj()); 598 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 599 "must be NULL or an object"); 600 if (UseBiasedLocking) { 601 // Retry fast entry if bias is revoked to avoid unnecessary inflation 602 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 603 } else { 604 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 605 } 606 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 607 "must be NULL or an object"); 608#ifdef ASSERT 609 thread->last_frame().interpreter_frame_verify_monitor(elem); 610#endif 611IRT_END 612 613 614//%note monitor_1 615IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 616#ifdef ASSERT 617 thread->last_frame().interpreter_frame_verify_monitor(elem); 618#endif 619 Handle h_obj(thread, elem->obj()); 620 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 621 "must be NULL or an object"); 622 if (elem == NULL || h_obj()->is_unlocked()) { 623 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 624 } 625 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 626 // Free entry. This must be done here, since a pending exception might be installed on 627 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 628 elem->set_obj(NULL); 629#ifdef ASSERT 630 thread->last_frame().interpreter_frame_verify_monitor(elem); 631#endif 632IRT_END 633 634 635IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 636 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 637IRT_END 638 639 640IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 641 // Returns an illegal exception to install into the current thread. The 642 // pending_exception flag is cleared so normal exception handling does not 643 // trigger. Any current installed exception will be overwritten. This 644 // method will be called during an exception unwind. 645 646 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 647 Handle exception(thread, thread->vm_result()); 648 assert(exception() != NULL, "vm result should be set"); 649 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 650 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 651 exception = get_preinitialized_exception( 652 SystemDictionary::IllegalMonitorStateException_klass(), 653 CATCH); 654 } 655 thread->set_vm_result(exception()); 656IRT_END 657 658 659//------------------------------------------------------------------------------------------------------------------------ 660// Invokes 661 662IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 663 return method->orig_bytecode_at(method->bci_from(bcp)); 664IRT_END 665 666IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 667 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 668IRT_END 669 670IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 671 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 672IRT_END 673 674IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { 675 // extract receiver from the outgoing argument list if necessary 676 Handle receiver(thread, NULL); 677 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 678 ResourceMark rm(thread); 679 methodHandle m (thread, method(thread)); 680 Bytecode_invoke call(m, bci(thread)); 681 Symbol* signature = call.signature(); 682 receiver = Handle(thread, 683 thread->last_frame().interpreter_callee_receiver(signature)); 684 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 685 "sanity check"); 686 assert(receiver.is_null() || 687 !Universe::heap()->is_in_reserved(receiver->klass()), 688 "sanity check"); 689 } 690 691 // resolve method 692 CallInfo info; 693 constantPoolHandle pool(thread, method(thread)->constants()); 694 695 { 696 JvmtiHideSingleStepping jhss(thread); 697 LinkResolver::resolve_invoke(info, receiver, pool, 698 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 699 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 700 int retry_count = 0; 701 while (info.resolved_method()->is_old()) { 702 // It is very unlikely that method is redefined more than 100 times 703 // in the middle of resolve. If it is looping here more than 100 times 704 // means then there could be a bug here. 705 guarantee((retry_count++ < 100), 706 "Could not resolve to latest version of redefined method"); 707 // method is redefined in the middle of resolve so re-try. 708 LinkResolver::resolve_invoke(info, receiver, pool, 709 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 710 } 711 } 712 } // end JvmtiHideSingleStepping 713 714 // check if link resolution caused cpCache to be updated 715 if (already_resolved(thread)) return; 716 717 if (bytecode == Bytecodes::_invokeinterface) { 718 if (TraceItables && Verbose) { 719 ResourceMark rm(thread); 720 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 721 } 722 } 723#ifdef ASSERT 724 if (bytecode == Bytecodes::_invokeinterface) { 725 if (info.resolved_method()->method_holder() == 726 SystemDictionary::Object_klass()) { 727 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 728 // (see also CallInfo::set_interface for details) 729 assert(info.call_kind() == CallInfo::vtable_call || 730 info.call_kind() == CallInfo::direct_call, ""); 731 methodHandle rm = info.resolved_method(); 732 assert(rm->is_final() || info.has_vtable_index(), 733 "should have been set already"); 734 } else if (!info.resolved_method()->has_itable_index()) { 735 // Resolved something like CharSequence.toString. Use vtable not itable. 736 assert(info.call_kind() != CallInfo::itable_call, ""); 737 } else { 738 // Setup itable entry 739 assert(info.call_kind() == CallInfo::itable_call, ""); 740 int index = info.resolved_method()->itable_index(); 741 assert(info.itable_index() == index, ""); 742 } 743 } else { 744 assert(info.call_kind() == CallInfo::direct_call || 745 info.call_kind() == CallInfo::vtable_call, ""); 746 } 747#endif 748 switch (info.call_kind()) { 749 case CallInfo::direct_call: 750 cache_entry(thread)->set_direct_call( 751 bytecode, 752 info.resolved_method()); 753 break; 754 case CallInfo::vtable_call: 755 cache_entry(thread)->set_vtable_call( 756 bytecode, 757 info.resolved_method(), 758 info.vtable_index()); 759 break; 760 case CallInfo::itable_call: 761 cache_entry(thread)->set_itable_call( 762 bytecode, 763 info.resolved_method(), 764 info.itable_index()); 765 break; 766 default: ShouldNotReachHere(); 767 } 768} 769IRT_END 770 771 772// First time execution: Resolve symbols, create a permanent MethodType object. 773IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { 774 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 775 776 // resolve method 777 CallInfo info; 778 constantPoolHandle pool(thread, method(thread)->constants()); 779 780 { 781 JvmtiHideSingleStepping jhss(thread); 782 LinkResolver::resolve_invoke(info, Handle(), pool, 783 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 784 } // end JvmtiHideSingleStepping 785 786 cache_entry(thread)->set_method_handle(pool, info); 787} 788IRT_END 789 790 791// First time execution: Resolve symbols, create a permanent CallSite object. 792IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 793 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 794 795 //TO DO: consider passing BCI to Java. 796 // int caller_bci = method(thread)->bci_from(bcp(thread)); 797 798 // resolve method 799 CallInfo info; 800 constantPoolHandle pool(thread, method(thread)->constants()); 801 int index = get_index_u4(thread, bytecode); 802 { 803 JvmtiHideSingleStepping jhss(thread); 804 LinkResolver::resolve_invoke(info, Handle(), pool, 805 index, bytecode, CHECK); 806 } // end JvmtiHideSingleStepping 807 808 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 809 cp_cache_entry->set_dynamic_call(pool, info); 810} 811IRT_END 812 813 814//------------------------------------------------------------------------------------------------------------------------ 815// Miscellaneous 816 817 818nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 819 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 820 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 821 if (branch_bcp != NULL && nm != NULL) { 822 // This was a successful request for an OSR nmethod. Because 823 // frequency_counter_overflow_inner ends with a safepoint check, 824 // nm could have been unloaded so look it up again. It's unsafe 825 // to examine nm directly since it might have been freed and used 826 // for something else. 827 frame fr = thread->last_frame(); 828 Method* method = fr.interpreter_frame_method(); 829 int bci = method->bci_from(fr.interpreter_frame_bcp()); 830 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 831 } 832#ifndef PRODUCT 833 if (TraceOnStackReplacement) { 834 if (nm != NULL) { 835 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 836 nm->print(); 837 } 838 } 839#endif 840 return nm; 841} 842 843IRT_ENTRY(nmethod*, 844 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 845 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 846 // flag, in case this method triggers classloading which will call into Java. 847 UnlockFlagSaver fs(thread); 848 849 frame fr = thread->last_frame(); 850 assert(fr.is_interpreted_frame(), "must come from interpreter"); 851 methodHandle method(thread, fr.interpreter_frame_method()); 852 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 853 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 854 855 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 856 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 857 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 858 859 if (osr_nm != NULL) { 860 // We may need to do on-stack replacement which requires that no 861 // monitors in the activation are biased because their 862 // BasicObjectLocks will need to migrate during OSR. Force 863 // unbiasing of all monitors in the activation now (even though 864 // the OSR nmethod might be invalidated) because we don't have a 865 // safepoint opportunity later once the migration begins. 866 if (UseBiasedLocking) { 867 ResourceMark rm; 868 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 869 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 870 kptr < fr.interpreter_frame_monitor_begin(); 871 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 872 if( kptr->obj() != NULL ) { 873 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 874 } 875 } 876 BiasedLocking::revoke(objects_to_revoke); 877 } 878 } 879 return osr_nm; 880IRT_END 881 882IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 883 assert(ProfileInterpreter, "must be profiling interpreter"); 884 int bci = method->bci_from(cur_bcp); 885 MethodData* mdo = method->method_data(); 886 if (mdo == NULL) return 0; 887 return mdo->bci_to_di(bci); 888IRT_END 889 890IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 891 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 892 // flag, in case this method triggers classloading which will call into Java. 893 UnlockFlagSaver fs(thread); 894 895 assert(ProfileInterpreter, "must be profiling interpreter"); 896 frame fr = thread->last_frame(); 897 assert(fr.is_interpreted_frame(), "must come from interpreter"); 898 methodHandle method(thread, fr.interpreter_frame_method()); 899 Method::build_interpreter_method_data(method, THREAD); 900 if (HAS_PENDING_EXCEPTION) { 901 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 902 CLEAR_PENDING_EXCEPTION; 903 // and fall through... 904 } 905IRT_END 906 907 908#ifdef ASSERT 909IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 910 assert(ProfileInterpreter, "must be profiling interpreter"); 911 912 MethodData* mdo = method->method_data(); 913 assert(mdo != NULL, "must not be null"); 914 915 int bci = method->bci_from(bcp); 916 917 address mdp2 = mdo->bci_to_dp(bci); 918 if (mdp != mdp2) { 919 ResourceMark rm; 920 ResetNoHandleMark rnm; // In a LEAF entry. 921 HandleMark hm; 922 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 923 int current_di = mdo->dp_to_di(mdp); 924 int expected_di = mdo->dp_to_di(mdp2); 925 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 926 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 927 int approx_bci = -1; 928 if (current_di >= 0) { 929 approx_bci = mdo->data_at(current_di)->bci(); 930 } 931 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 932 mdo->print_on(tty); 933 method->print_codes(); 934 } 935 assert(mdp == mdp2, "wrong mdp"); 936IRT_END 937#endif // ASSERT 938 939IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 940 assert(ProfileInterpreter, "must be profiling interpreter"); 941 ResourceMark rm(thread); 942 HandleMark hm(thread); 943 frame fr = thread->last_frame(); 944 assert(fr.is_interpreted_frame(), "must come from interpreter"); 945 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 946 947 // Grab a lock to ensure atomic access to setting the return bci and 948 // the displacement. This can block and GC, invalidating all naked oops. 949 MutexLocker ml(RetData_lock); 950 951 // ProfileData is essentially a wrapper around a derived oop, so we 952 // need to take the lock before making any ProfileData structures. 953 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 954 RetData* rdata = data->as_RetData(); 955 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 956 fr.interpreter_frame_set_mdp(new_mdp); 957IRT_END 958 959IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 960 MethodCounters* mcs = Method::build_method_counters(m, thread); 961 if (HAS_PENDING_EXCEPTION) { 962 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 963 CLEAR_PENDING_EXCEPTION; 964 } 965 return mcs; 966IRT_END 967 968 969IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 970 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 971 // stack traversal automatically takes care of preserving arguments for invoke, so 972 // this is no longer needed. 973 974 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 975 // if this is called during a safepoint 976 977 if (JvmtiExport::should_post_single_step()) { 978 // We are called during regular safepoints and when the VM is 979 // single stepping. If any thread is marked for single stepping, 980 // then we may have JVMTI work to do. 981 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 982 } 983IRT_END 984 985IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 986ConstantPoolCacheEntry *cp_entry)) 987 988 // check the access_flags for the field in the klass 989 990 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 991 int index = cp_entry->field_index(); 992 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 993 994 switch(cp_entry->flag_state()) { 995 case btos: // fall through 996 case ctos: // fall through 997 case stos: // fall through 998 case itos: // fall through 999 case ftos: // fall through 1000 case ltos: // fall through 1001 case dtos: // fall through 1002 case atos: break; 1003 default: ShouldNotReachHere(); return; 1004 } 1005 bool is_static = (obj == NULL); 1006 HandleMark hm(thread); 1007 1008 Handle h_obj; 1009 if (!is_static) { 1010 // non-static field accessors have an object, but we need a handle 1011 h_obj = Handle(thread, obj); 1012 } 1013 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1014 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1015 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1016IRT_END 1017 1018IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1019 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1020 1021 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1022 1023 // check the access_flags for the field in the klass 1024 InstanceKlass* ik = InstanceKlass::cast(k); 1025 int index = cp_entry->field_index(); 1026 // bail out if field modifications are not watched 1027 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1028 1029 char sig_type = '\0'; 1030 1031 switch(cp_entry->flag_state()) { 1032 case btos: sig_type = 'Z'; break; 1033 case ctos: sig_type = 'C'; break; 1034 case stos: sig_type = 'S'; break; 1035 case itos: sig_type = 'I'; break; 1036 case ftos: sig_type = 'F'; break; 1037 case atos: sig_type = 'L'; break; 1038 case ltos: sig_type = 'J'; break; 1039 case dtos: sig_type = 'D'; break; 1040 default: ShouldNotReachHere(); return; 1041 } 1042 bool is_static = (obj == NULL); 1043 1044 HandleMark hm(thread); 1045 instanceKlassHandle h_klass(thread, k); 1046 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1047 jvalue fvalue; 1048#ifdef _LP64 1049 fvalue = *value; 1050#else 1051 // Long/double values are stored unaligned and also noncontiguously with 1052 // tagged stacks. We can't just do a simple assignment even in the non- 1053 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1054 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1055 // We assume that the two halves of longs/doubles are stored in interpreter 1056 // stack slots in platform-endian order. 1057 jlong_accessor u; 1058 jint* newval = (jint*)value; 1059 u.words[0] = newval[0]; 1060 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1061 fvalue.j = u.long_value; 1062#endif // _LP64 1063 1064 Handle h_obj; 1065 if (!is_static) { 1066 // non-static field accessors have an object, but we need a handle 1067 h_obj = Handle(thread, obj); 1068 } 1069 1070 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1071 fid, sig_type, &fvalue); 1072IRT_END 1073 1074IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1075 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1076IRT_END 1077 1078 1079IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1080 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1081IRT_END 1082 1083IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1084{ 1085 return (Interpreter::contains(pc) ? 1 : 0); 1086} 1087IRT_END 1088 1089 1090// Implementation of SignatureHandlerLibrary 1091 1092address SignatureHandlerLibrary::set_handler_blob() { 1093 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1094 if (handler_blob == NULL) { 1095 return NULL; 1096 } 1097 address handler = handler_blob->code_begin(); 1098 _handler_blob = handler_blob; 1099 _handler = handler; 1100 return handler; 1101} 1102 1103void SignatureHandlerLibrary::initialize() { 1104 if (_fingerprints != NULL) { 1105 return; 1106 } 1107 if (set_handler_blob() == NULL) { 1108 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1109 } 1110 1111 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1112 SignatureHandlerLibrary::buffer_size); 1113 _buffer = bb->code_begin(); 1114 1115 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1116 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1117} 1118 1119address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1120 address handler = _handler; 1121 int insts_size = buffer->pure_insts_size(); 1122 if (handler + insts_size > _handler_blob->code_end()) { 1123 // get a new handler blob 1124 handler = set_handler_blob(); 1125 } 1126 if (handler != NULL) { 1127 memcpy(handler, buffer->insts_begin(), insts_size); 1128 pd_set_handler(handler); 1129 ICache::invalidate_range(handler, insts_size); 1130 _handler = handler + insts_size; 1131 } 1132 return handler; 1133} 1134 1135void SignatureHandlerLibrary::add(methodHandle method) { 1136 if (method->signature_handler() == NULL) { 1137 // use slow signature handler if we can't do better 1138 int handler_index = -1; 1139 // check if we can use customized (fast) signature handler 1140 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1141 // use customized signature handler 1142 MutexLocker mu(SignatureHandlerLibrary_lock); 1143 // make sure data structure is initialized 1144 initialize(); 1145 // lookup method signature's fingerprint 1146 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1147 handler_index = _fingerprints->find(fingerprint); 1148 // create handler if necessary 1149 if (handler_index < 0) { 1150 ResourceMark rm; 1151 ptrdiff_t align_offset = (address) 1152 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1153 CodeBuffer buffer((address)(_buffer + align_offset), 1154 SignatureHandlerLibrary::buffer_size - align_offset); 1155 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1156 // copy into code heap 1157 address handler = set_handler(&buffer); 1158 if (handler == NULL) { 1159 // use slow signature handler 1160 } else { 1161 // debugging suppport 1162 if (PrintSignatureHandlers) { 1163 tty->cr(); 1164 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1165 _handlers->length(), 1166 (method->is_static() ? "static" : "receiver"), 1167 method->name_and_sig_as_C_string(), 1168 fingerprint, 1169 buffer.insts_size()); 1170 Disassembler::decode(handler, handler + buffer.insts_size()); 1171#ifndef PRODUCT 1172 tty->print_cr(" --- associated result handler ---"); 1173 address rh_begin = Interpreter::result_handler(method()->result_type()); 1174 address rh_end = rh_begin; 1175 while (*(int*)rh_end != 0) { 1176 rh_end += sizeof(int); 1177 } 1178 Disassembler::decode(rh_begin, rh_end); 1179#endif 1180 } 1181 // add handler to library 1182 _fingerprints->append(fingerprint); 1183 _handlers->append(handler); 1184 // set handler index 1185 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1186 handler_index = _fingerprints->length() - 1; 1187 } 1188 } 1189 // Set handler under SignatureHandlerLibrary_lock 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 } else { 1198 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1199 // use generic signature handler 1200 method->set_signature_handler(Interpreter::slow_signature_handler()); 1201 } 1202 } 1203#ifdef ASSERT 1204 int handler_index = -1; 1205 int fingerprint_index = -2; 1206 { 1207 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1208 // in any way if accessed from multiple threads. To avoid races with another 1209 // thread which may change the arrays in the above, mutex protected block, we 1210 // have to protect this read access here with the same mutex as well! 1211 MutexLocker mu(SignatureHandlerLibrary_lock); 1212 if (_handlers != NULL) { 1213 handler_index = _handlers->find(method->signature_handler()); 1214 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1215 } 1216 } 1217 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1218 handler_index == fingerprint_index, "sanity check"); 1219#endif // ASSERT 1220} 1221 1222 1223BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1224address SignatureHandlerLibrary::_handler = NULL; 1225GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1226GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1227address SignatureHandlerLibrary::_buffer = NULL; 1228 1229 1230IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1231 methodHandle m(thread, method); 1232 assert(m->is_native(), "sanity check"); 1233 // lookup native function entry point if it doesn't exist 1234 bool in_base_library; 1235 if (!m->has_native_function()) { 1236 NativeLookup::lookup(m, in_base_library, CHECK); 1237 } 1238 // make sure signature handler is installed 1239 SignatureHandlerLibrary::add(m); 1240 // The interpreter entry point checks the signature handler first, 1241 // before trying to fetch the native entry point and klass mirror. 1242 // We must set the signature handler last, so that multiple processors 1243 // preparing the same method will be sure to see non-null entry & mirror. 1244IRT_END 1245 1246#if defined(IA32) || defined(AMD64) || defined(ARM) 1247IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1248 if (src_address == dest_address) { 1249 return; 1250 } 1251 ResetNoHandleMark rnm; // In a LEAF entry. 1252 HandleMark hm; 1253 ResourceMark rm; 1254 frame fr = thread->last_frame(); 1255 assert(fr.is_interpreted_frame(), ""); 1256 jint bci = fr.interpreter_frame_bci(); 1257 methodHandle mh(thread, fr.interpreter_frame_method()); 1258 Bytecode_invoke invoke(mh, bci); 1259 ArgumentSizeComputer asc(invoke.signature()); 1260 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1261 Copy::conjoint_jbytes(src_address, dest_address, 1262 size_of_arguments * Interpreter::stackElementSize); 1263IRT_END 1264#endif 1265 1266#if INCLUDE_JVMTI 1267// This is a support of the JVMTI PopFrame interface. 1268// Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1269// and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1270// The member_name argument is a saved reference (in local#0) to the member_name. 1271// For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1272// FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1273IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1274 Method* method, address bcp)) 1275 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1276 if (code != Bytecodes::_invokestatic) { 1277 return; 1278 } 1279 ConstantPool* cpool = method->constants(); 1280 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1281 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1282 Symbol* mname = cpool->name_ref_at(cp_index); 1283 1284 if (MethodHandles::has_member_arg(cname, mname)) { 1285 oop member_name_oop = (oop) member_name; 1286 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1287 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1288 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1289 } 1290 thread->set_vm_result(member_name_oop); 1291 } 1292IRT_END 1293#endif // INCLUDE_JVMTI 1294