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/interfaceSupport.hpp" 52 #include "runtime/java.hpp" 53 #include "runtime/jfieldIDWorkaround.hpp" 54 #include "runtime/osThread.hpp" 55 #include "runtime/sharedRuntime.hpp" 56 #include "runtime/stubRoutines.hpp" 57 #include "runtime/synchronizer.hpp" 58 #include "runtime/threadCritical.hpp" 59 #include "utilities/events.hpp" 60 #ifdef TARGET_ARCH_x86 61 # include "vm_version_x86.hpp" 62 #endif 63 #ifdef TARGET_ARCH_sparc 64 # include "vm_version_sparc.hpp" 65 #endif 66 #ifdef TARGET_ARCH_zero 67 # include "vm_version_zero.hpp" 68 #endif 69 #ifdef TARGET_ARCH_arm 70 # include "vm_version_arm.hpp" 71 #endif 72 #ifdef TARGET_ARCH_ppc 73 # include "vm_version_ppc.hpp" 74 #endif 75 #ifdef COMPILER2 76 #include "opto/runtime.hpp" 77 #endif 78 79 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 80 81 class UnlockFlagSaver { 82 private: 83 JavaThread* _thread; 84 bool _do_not_unlock; 85 public: 86 UnlockFlagSaver(JavaThread* t) { 87 _thread = t; 88 _do_not_unlock = t->do_not_unlock_if_synchronized(); 89 t->set_do_not_unlock_if_synchronized(false); 90 } 91 ~UnlockFlagSaver() { 92 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 93 } 94 }; 95 96 //------------------------------------------------------------------------------------------------------------------------ 97 // State accessors 98 99 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 100 last_frame(thread).interpreter_frame_set_bcp(bcp); 101 if (ProfileInterpreter) { 102 // ProfileTraps uses MDOs independently of ProfileInterpreter. 103 // That is why we must check both ProfileInterpreter and mdo != NULL. 104 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 105 if (mdo != NULL) { 106 NEEDS_CLEANUP; 107 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 108 } 109 } 110 } 111 112 //------------------------------------------------------------------------------------------------------------------------ 113 // Constants 114 115 116 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 117 // access constant pool 118 ConstantPool* pool = method(thread)->constants(); 119 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 120 constantTag tag = pool->tag_at(index); 121 122 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 123 Klass* klass = pool->klass_at(index, CHECK); 124 oop java_class = klass->java_mirror(); 125 thread->set_vm_result(java_class); 126 IRT_END 127 128 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 129 assert(bytecode == Bytecodes::_fast_aldc || 130 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 131 ResourceMark rm(thread); 132 methodHandle m (thread, method(thread)); 133 Bytecode_loadconstant ldc(m, bci(thread)); 134 oop result = ldc.resolve_constant(CHECK); 135 #ifdef ASSERT 136 { 137 // The bytecode wrappers aren't GC-safe so construct a new one 138 Bytecode_loadconstant ldc2(m, bci(thread)); 139 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 140 assert(result == coop, "expected result for assembly code"); 141 } 142 #endif 143 thread->set_vm_result(result); 144 } 145 IRT_END 146 147 148 //------------------------------------------------------------------------------------------------------------------------ 149 // Allocation 150 151 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 152 Klass* k_oop = pool->klass_at(index, CHECK); 153 instanceKlassHandle klass (THREAD, k_oop); 154 155 // Make sure we are not instantiating an abstract klass 156 klass->check_valid_for_instantiation(true, CHECK); 157 158 // Make sure klass is initialized 159 klass->initialize(CHECK); 160 161 // At this point the class may not be fully initialized 162 // because of recursive initialization. If it is fully 163 // initialized & has_finalized is not set, we rewrite 164 // it into its fast version (Note: no locking is needed 165 // here since this is an atomic byte write and can be 166 // done more than once). 167 // 168 // Note: In case of classes with has_finalized we don't 169 // rewrite since that saves us an extra check in 170 // the fast version which then would call the 171 // slow version anyway (and do a call back into 172 // Java). 173 // If we have a breakpoint, then we don't rewrite 174 // because the _breakpoint bytecode would be lost. 175 oop obj = klass->allocate_instance(CHECK); 176 thread->set_vm_result(obj); 177 IRT_END 178 179 180 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 181 oop obj = oopFactory::new_typeArray(type, size, CHECK); 182 thread->set_vm_result(obj); 183 IRT_END 184 185 186 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 187 // Note: no oopHandle for pool & klass needed since they are not used 188 // anymore after new_objArray() and no GC can happen before. 189 // (This may have to change if this code changes!) 190 Klass* klass = pool->klass_at(index, CHECK); 191 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 192 thread->set_vm_result(obj); 193 IRT_END 194 195 196 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 197 // We may want to pass in more arguments - could make this slightly faster 198 ConstantPool* constants = method(thread)->constants(); 199 int i = get_index_u2(thread, Bytecodes::_multianewarray); 200 Klass* klass = constants->klass_at(i, CHECK); 201 int nof_dims = number_of_dimensions(thread); 202 assert(klass->is_klass(), "not a class"); 203 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 204 205 // We must create an array of jints to pass to multi_allocate. 206 ResourceMark rm(thread); 207 const int small_dims = 10; 208 jint dim_array[small_dims]; 209 jint *dims = &dim_array[0]; 210 if (nof_dims > small_dims) { 211 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 212 } 213 for (int index = 0; index < nof_dims; index++) { 214 // offset from first_size_address is addressed as local[index] 215 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 216 dims[index] = first_size_address[n]; 217 } 218 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 219 thread->set_vm_result(obj); 220 IRT_END 221 222 223 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 224 assert(obj->is_oop(), "must be a valid oop"); 225 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 226 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 227 IRT_END 228 229 230 // Quicken instance-of and check-cast bytecodes 231 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 232 // Force resolving; quicken the bytecode 233 int which = get_index_u2(thread, Bytecodes::_checkcast); 234 ConstantPool* cpool = method(thread)->constants(); 235 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 236 // program we might have seen an unquick'd bytecode in the interpreter but have another 237 // thread quicken the bytecode before we get here. 238 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 239 Klass* klass = cpool->klass_at(which, CHECK); 240 thread->set_vm_result_2(klass); 241 IRT_END 242 243 244 //------------------------------------------------------------------------------------------------------------------------ 245 // Exceptions 246 247 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 248 methodHandle trap_method, int trap_bci, TRAPS) { 249 if (trap_method.not_null()) { 250 MethodData* trap_mdo = trap_method->method_data(); 251 if (trap_mdo == NULL) { 252 Method::build_interpreter_method_data(trap_method, THREAD); 253 if (HAS_PENDING_EXCEPTION) { 254 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 255 "we expect only an OOM error here"); 256 CLEAR_PENDING_EXCEPTION; 257 } 258 trap_mdo = trap_method->method_data(); 259 // and fall through... 260 } 261 if (trap_mdo != NULL) { 262 // Update per-method count of trap events. The interpreter 263 // is updating the MDO to simulate the effect of compiler traps. 264 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 265 } 266 } 267 } 268 269 // Assume the compiler is (or will be) interested in this event. 270 // If necessary, create an MDO to hold the information, and record it. 271 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 272 assert(ProfileTraps, "call me only if profiling"); 273 methodHandle trap_method(thread, method(thread)); 274 int trap_bci = trap_method->bci_from(bcp(thread)); 275 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 276 } 277 278 #ifdef CC_INTERP 279 // As legacy note_trap, but we have more arguments. 280 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 281 methodHandle trap_method(method); 282 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 283 IRT_END 284 285 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 286 // for each exception. 287 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 288 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 289 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 290 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 291 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 292 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 293 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 294 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 295 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 296 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 297 #endif // CC_INTERP 298 299 300 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 301 // get klass 302 InstanceKlass* klass = InstanceKlass::cast(k); 303 assert(klass->is_initialized(), 304 "this klass should have been initialized during VM initialization"); 305 // create instance - do not call constructor since we may have no 306 // (java) stack space left (should assert constructor is empty) 307 Handle exception; 308 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 309 exception = Handle(THREAD, exception_oop); 310 if (StackTraceInThrowable) { 311 java_lang_Throwable::fill_in_stack_trace(exception); 312 } 313 return exception; 314 } 315 316 // Special handling for stack overflow: since we don't have any (java) stack 317 // space left we use the pre-allocated & pre-initialized StackOverflowError 318 // klass to create an stack overflow error instance. We do not call its 319 // constructor for the same reason (it is empty, anyway). 320 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 321 Handle exception = get_preinitialized_exception( 322 SystemDictionary::StackOverflowError_klass(), 323 CHECK); 324 THROW_HANDLE(exception); 325 IRT_END 326 327 328 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 329 // lookup exception klass 330 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 331 if (ProfileTraps) { 332 if (s == vmSymbols::java_lang_ArithmeticException()) { 333 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 334 } else if (s == vmSymbols::java_lang_NullPointerException()) { 335 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 336 } 337 } 338 // create exception 339 Handle exception = Exceptions::new_exception(thread, s, message); 340 thread->set_vm_result(exception()); 341 IRT_END 342 343 344 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 345 ResourceMark rm(thread); 346 const char* klass_name = obj->klass()->external_name(); 347 // lookup exception klass 348 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 349 if (ProfileTraps) { 350 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 351 } 352 // create exception, with klass name as detail message 353 Handle exception = Exceptions::new_exception(thread, s, klass_name); 354 thread->set_vm_result(exception()); 355 IRT_END 356 357 358 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 359 char message[jintAsStringSize]; 360 // lookup exception klass 361 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 362 if (ProfileTraps) { 363 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 364 } 365 // create exception 366 sprintf(message, "%d", index); 367 THROW_MSG(s, message); 368 IRT_END 369 370 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 371 JavaThread* thread, oopDesc* obj)) 372 373 ResourceMark rm(thread); 374 char* message = SharedRuntime::generate_class_cast_message( 375 thread, obj->klass()->external_name()); 376 377 if (ProfileTraps) { 378 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 379 } 380 381 // create exception 382 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 383 IRT_END 384 385 // exception_handler_for_exception(...) returns the continuation address, 386 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 387 // The exception oop is returned to make sure it is preserved over GC (it 388 // is only on the stack if the exception was thrown explicitly via athrow). 389 // During this operation, the expression stack contains the values for the 390 // bci where the exception happened. If the exception was propagated back 391 // from a call, the expression stack contains the values for the bci at the 392 // invoke w/o arguments (i.e., as if one were inside the call). 393 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 394 395 Handle h_exception(thread, exception); 396 methodHandle h_method (thread, method(thread)); 397 constantPoolHandle h_constants(thread, h_method->constants()); 398 bool should_repeat; 399 int handler_bci; 400 int current_bci = bci(thread); 401 402 // Need to do this check first since when _do_not_unlock_if_synchronized 403 // is set, we don't want to trigger any classloading which may make calls 404 // into java, or surprisingly find a matching exception handler for bci 0 405 // since at this moment the method hasn't been "officially" entered yet. 406 if (thread->do_not_unlock_if_synchronized()) { 407 ResourceMark rm; 408 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 409 thread->set_vm_result(exception); 410 #ifdef CC_INTERP 411 return (address) -1; 412 #else 413 return Interpreter::remove_activation_entry(); 414 #endif 415 } 416 417 do { 418 should_repeat = false; 419 420 // assertions 421 #ifdef ASSERT 422 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 423 assert(h_exception->is_oop(), "just checking"); 424 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 425 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 426 if (ExitVMOnVerifyError) vm_exit(-1); 427 ShouldNotReachHere(); 428 } 429 #endif 430 431 // tracing 432 if (TraceExceptions) { 433 ttyLocker ttyl; 434 ResourceMark rm(thread); 435 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 436 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 437 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 438 } 439 // Don't go paging in something which won't be used. 440 // else if (extable->length() == 0) { 441 // // disabled for now - interpreter is not using shortcut yet 442 // // (shortcut is not to call runtime if we have no exception handlers) 443 // // warning("performance bug: should not call runtime if method has no exception handlers"); 444 // } 445 // for AbortVMOnException flag 446 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 447 448 // exception handler lookup 449 KlassHandle h_klass(THREAD, h_exception->klass()); 450 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 451 if (HAS_PENDING_EXCEPTION) { 452 // We threw an exception while trying to find the exception handler. 453 // Transfer the new exception to the exception handle which will 454 // be set into thread local storage, and do another lookup for an 455 // exception handler for this exception, this time starting at the 456 // BCI of the exception handler which caused the exception to be 457 // thrown (bug 4307310). 458 h_exception = Handle(THREAD, PENDING_EXCEPTION); 459 CLEAR_PENDING_EXCEPTION; 460 if (handler_bci >= 0) { 461 current_bci = handler_bci; 462 should_repeat = true; 463 } 464 } 465 } while (should_repeat == true); 466 467 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 468 // time throw or a stack unwinding throw and accordingly notify the debugger 469 if (JvmtiExport::can_post_on_exceptions()) { 470 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 471 } 472 473 #ifdef CC_INTERP 474 address continuation = (address)(intptr_t) handler_bci; 475 #else 476 address continuation = NULL; 477 #endif 478 address handler_pc = NULL; 479 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 480 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 481 // handler in this method, or (b) after a stack overflow there is not yet 482 // enough stack space available to reprotect the stack. 483 #ifndef CC_INTERP 484 continuation = Interpreter::remove_activation_entry(); 485 #endif 486 // Count this for compilation purposes 487 h_method->interpreter_throwout_increment(THREAD); 488 } else { 489 // handler in this method => change bci/bcp to handler bci/bcp and continue there 490 handler_pc = h_method->code_base() + handler_bci; 491 #ifndef CC_INTERP 492 set_bcp_and_mdp(handler_pc, thread); 493 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 494 #endif 495 } 496 // notify debugger of an exception catch 497 // (this is good for exceptions caught in native methods as well) 498 if (JvmtiExport::can_post_on_exceptions()) { 499 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 500 } 501 502 thread->set_vm_result(h_exception()); 503 return continuation; 504 IRT_END 505 506 507 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 508 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 509 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 510 IRT_END 511 512 513 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 514 THROW(vmSymbols::java_lang_AbstractMethodError()); 515 IRT_END 516 517 518 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 519 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 520 IRT_END 521 522 523 //------------------------------------------------------------------------------------------------------------------------ 524 // Fields 525 // 526 527 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 528 // resolve field 529 fieldDescriptor info; 530 constantPoolHandle pool(thread, method(thread)->constants()); 531 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); 532 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 533 534 { 535 JvmtiHideSingleStepping jhss(thread); 536 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 537 bytecode, CHECK); 538 } // end JvmtiHideSingleStepping 539 540 // check if link resolution caused cpCache to be updated 541 if (already_resolved(thread)) return; 542 543 // compute auxiliary field attributes 544 TosState state = as_TosState(info.field_type()); 545 546 // We need to delay resolving put instructions on final fields 547 // until we actually invoke one. This is required so we throw 548 // exceptions at the correct place. If we do not resolve completely 549 // in the current pass, leaving the put_code set to zero will 550 // cause the next put instruction to reresolve. 551 Bytecodes::Code put_code = (Bytecodes::Code)0; 552 553 // We also need to delay resolving getstatic instructions until the 554 // class is intitialized. This is required so that access to the static 555 // field will call the initialization function every time until the class 556 // is completely initialized ala. in 2.17.5 in JVM Specification. 557 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 558 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 559 !klass->is_initialized()); 560 Bytecodes::Code get_code = (Bytecodes::Code)0; 561 562 if (!uninitialized_static) { 563 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 564 if (is_put || !info.access_flags().is_final()) { 565 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 566 } 567 } 568 569 cache_entry(thread)->set_field( 570 get_code, 571 put_code, 572 info.field_holder(), 573 info.index(), 574 info.offset(), 575 state, 576 info.access_flags().is_final(), 577 info.access_flags().is_volatile(), 578 pool->pool_holder() 579 ); 580 IRT_END 581 582 583 //------------------------------------------------------------------------------------------------------------------------ 584 // Synchronization 585 // 586 // The interpreter's synchronization code is factored out so that it can 587 // be shared by method invocation and synchronized blocks. 588 //%note synchronization_3 589 590 //%note monitor_1 591 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 592 #ifdef ASSERT 593 thread->last_frame().interpreter_frame_verify_monitor(elem); 594 #endif 595 if (PrintBiasedLockingStatistics) { 596 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 597 } 598 Handle h_obj(thread, elem->obj()); 599 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 600 "must be NULL or an object"); 601 if (UseBiasedLocking) { 602 // Retry fast entry if bias is revoked to avoid unnecessary inflation 603 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 604 } else { 605 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 606 } 607 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 608 "must be NULL or an object"); 609 #ifdef ASSERT 610 thread->last_frame().interpreter_frame_verify_monitor(elem); 611 #endif 612 IRT_END 613 614 615 //%note monitor_1 616 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 617 #ifdef ASSERT 618 thread->last_frame().interpreter_frame_verify_monitor(elem); 619 #endif 620 Handle h_obj(thread, elem->obj()); 621 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 622 "must be NULL or an object"); 623 if (elem == NULL || h_obj()->is_unlocked()) { 624 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 625 } 626 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 627 // Free entry. This must be done here, since a pending exception might be installed on 628 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 629 elem->set_obj(NULL); 630 #ifdef ASSERT 631 thread->last_frame().interpreter_frame_verify_monitor(elem); 632 #endif 633 IRT_END 634 635 636 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 637 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 638 IRT_END 639 640 641 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 642 // Returns an illegal exception to install into the current thread. The 643 // pending_exception flag is cleared so normal exception handling does not 644 // trigger. Any current installed exception will be overwritten. This 645 // method will be called during an exception unwind. 646 647 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 648 Handle exception(thread, thread->vm_result()); 649 assert(exception() != NULL, "vm result should be set"); 650 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 651 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 652 exception = get_preinitialized_exception( 653 SystemDictionary::IllegalMonitorStateException_klass(), 654 CATCH); 655 } 656 thread->set_vm_result(exception()); 657 IRT_END 658 659 660 //------------------------------------------------------------------------------------------------------------------------ 661 // Invokes 662 663 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 664 return method->orig_bytecode_at(method->bci_from(bcp)); 665 IRT_END 666 667 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 668 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 669 IRT_END 670 671 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 672 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 673 IRT_END 674 675 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { 676 // extract receiver from the outgoing argument list if necessary 677 Handle receiver(thread, NULL); 678 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 679 ResourceMark rm(thread); 680 methodHandle m (thread, method(thread)); 681 Bytecode_invoke call(m, bci(thread)); 682 Symbol* signature = call.signature(); 683 receiver = Handle(thread, 684 thread->last_frame().interpreter_callee_receiver(signature)); 685 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 686 "sanity check"); 687 assert(receiver.is_null() || 688 !Universe::heap()->is_in_reserved(receiver->klass()), 689 "sanity check"); 690 } 691 692 // resolve method 693 CallInfo info; 694 constantPoolHandle pool(thread, method(thread)->constants()); 695 696 { 697 JvmtiHideSingleStepping jhss(thread); 698 LinkResolver::resolve_invoke(info, receiver, pool, 699 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 700 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 701 int retry_count = 0; 702 while (info.resolved_method()->is_old()) { 703 // It is very unlikely that method is redefined more than 100 times 704 // in the middle of resolve. If it is looping here more than 100 times 705 // means then there could be a bug here. 706 guarantee((retry_count++ < 100), 707 "Could not resolve to latest version of redefined method"); 708 // method is redefined in the middle of resolve so re-try. 709 LinkResolver::resolve_invoke(info, receiver, pool, 710 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 711 } 712 } 713 } // end JvmtiHideSingleStepping 714 715 // check if link resolution caused cpCache to be updated 716 if (already_resolved(thread)) return; 717 718 if (bytecode == Bytecodes::_invokeinterface) { 719 if (TraceItables && Verbose) { 720 ResourceMark rm(thread); 721 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 722 } 723 } 724 #ifdef ASSERT 725 if (bytecode == Bytecodes::_invokeinterface) { 726 if (info.resolved_method()->method_holder() == 727 SystemDictionary::Object_klass()) { 728 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 729 // (see also CallInfo::set_interface for details) 730 assert(info.call_kind() == CallInfo::vtable_call || 731 info.call_kind() == CallInfo::direct_call, ""); 732 methodHandle rm = info.resolved_method(); 733 assert(rm->is_final() || info.has_vtable_index(), 734 "should have been set already"); 735 } else if (!info.resolved_method()->has_itable_index()) { 736 // Resolved something like CharSequence.toString. Use vtable not itable. 737 assert(info.call_kind() != CallInfo::itable_call, ""); 738 } else { 739 // Setup itable entry 740 assert(info.call_kind() == CallInfo::itable_call, ""); 741 int index = info.resolved_method()->itable_index(); 742 assert(info.itable_index() == index, ""); 743 } 744 } else { 745 assert(info.call_kind() == CallInfo::direct_call || 746 info.call_kind() == CallInfo::vtable_call, ""); 747 } 748 #endif 749 switch (info.call_kind()) { 750 case CallInfo::direct_call: 751 cache_entry(thread)->set_direct_call( 752 bytecode, 753 info.resolved_method()); 754 break; 755 case CallInfo::vtable_call: 756 cache_entry(thread)->set_vtable_call( 757 bytecode, 758 info.resolved_method(), 759 info.vtable_index()); 760 break; 761 case CallInfo::itable_call: 762 cache_entry(thread)->set_itable_call( 763 bytecode, 764 info.resolved_method(), 765 info.itable_index()); 766 break; 767 default: ShouldNotReachHere(); 768 } 769 } 770 IRT_END 771 772 773 // First time execution: Resolve symbols, create a permanent MethodType object. 774 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { 775 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 776 777 // resolve method 778 CallInfo info; 779 constantPoolHandle pool(thread, method(thread)->constants()); 780 781 { 782 JvmtiHideSingleStepping jhss(thread); 783 LinkResolver::resolve_invoke(info, Handle(), pool, 784 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 785 } // end JvmtiHideSingleStepping 786 787 cache_entry(thread)->set_method_handle(pool, info); 788 } 789 IRT_END 790 791 792 // First time execution: Resolve symbols, create a permanent CallSite object. 793 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 794 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 795 796 //TO DO: consider passing BCI to Java. 797 // int caller_bci = method(thread)->bci_from(bcp(thread)); 798 799 // resolve method 800 CallInfo info; 801 constantPoolHandle pool(thread, method(thread)->constants()); 802 int index = get_index_u4(thread, bytecode); 803 { 804 JvmtiHideSingleStepping jhss(thread); 805 LinkResolver::resolve_invoke(info, Handle(), pool, 806 index, bytecode, CHECK); 807 } // end JvmtiHideSingleStepping 808 809 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 810 cp_cache_entry->set_dynamic_call(pool, info); 811 } 812 IRT_END 813 814 815 //------------------------------------------------------------------------------------------------------------------------ 816 // Miscellaneous 817 818 819 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 820 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 821 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 822 if (branch_bcp != NULL && nm != NULL) { 823 // This was a successful request for an OSR nmethod. Because 824 // frequency_counter_overflow_inner ends with a safepoint check, 825 // nm could have been unloaded so look it up again. It's unsafe 826 // to examine nm directly since it might have been freed and used 827 // for something else. 828 frame fr = thread->last_frame(); 829 Method* method = fr.interpreter_frame_method(); 830 int bci = method->bci_from(fr.interpreter_frame_bcp()); 831 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 832 } 833 #ifndef PRODUCT 834 if (TraceOnStackReplacement) { 835 if (nm != NULL) { 836 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 837 nm->print(); 838 } 839 } 840 #endif 841 return nm; 842 } 843 844 IRT_ENTRY(nmethod*, 845 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 846 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 847 // flag, in case this method triggers classloading which will call into Java. 848 UnlockFlagSaver fs(thread); 849 850 frame fr = thread->last_frame(); 851 assert(fr.is_interpreted_frame(), "must come from interpreter"); 852 methodHandle method(thread, fr.interpreter_frame_method()); 853 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 854 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 855 856 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 857 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 858 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 859 860 if (osr_nm != NULL) { 861 // We may need to do on-stack replacement which requires that no 862 // monitors in the activation are biased because their 863 // BasicObjectLocks will need to migrate during OSR. Force 864 // unbiasing of all monitors in the activation now (even though 865 // the OSR nmethod might be invalidated) because we don't have a 866 // safepoint opportunity later once the migration begins. 867 if (UseBiasedLocking) { 868 ResourceMark rm; 869 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 870 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 871 kptr < fr.interpreter_frame_monitor_begin(); 872 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 873 if( kptr->obj() != NULL ) { 874 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 875 } 876 } 877 BiasedLocking::revoke(objects_to_revoke); 878 } 879 } 880 return osr_nm; 881 IRT_END 882 883 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 884 assert(ProfileInterpreter, "must be profiling interpreter"); 885 int bci = method->bci_from(cur_bcp); 886 MethodData* mdo = method->method_data(); 887 if (mdo == NULL) return 0; 888 return mdo->bci_to_di(bci); 889 IRT_END 890 891 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 892 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 893 // flag, in case this method triggers classloading which will call into Java. 894 UnlockFlagSaver fs(thread); 895 896 assert(ProfileInterpreter, "must be profiling interpreter"); 897 frame fr = thread->last_frame(); 898 assert(fr.is_interpreted_frame(), "must come from interpreter"); 899 methodHandle method(thread, fr.interpreter_frame_method()); 900 Method::build_interpreter_method_data(method, THREAD); 901 if (HAS_PENDING_EXCEPTION) { 902 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 903 CLEAR_PENDING_EXCEPTION; 904 // and fall through... 905 } 906 IRT_END 907 908 909 #ifdef ASSERT 910 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 911 assert(ProfileInterpreter, "must be profiling interpreter"); 912 913 MethodData* mdo = method->method_data(); 914 assert(mdo != NULL, "must not be null"); 915 916 int bci = method->bci_from(bcp); 917 918 address mdp2 = mdo->bci_to_dp(bci); 919 if (mdp != mdp2) { 920 ResourceMark rm; 921 ResetNoHandleMark rnm; // In a LEAF entry. 922 HandleMark hm; 923 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 924 int current_di = mdo->dp_to_di(mdp); 925 int expected_di = mdo->dp_to_di(mdp2); 926 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 927 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 928 int approx_bci = -1; 929 if (current_di >= 0) { 930 approx_bci = mdo->data_at(current_di)->bci(); 931 } 932 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 933 mdo->print_on(tty); 934 method->print_codes(); 935 } 936 assert(mdp == mdp2, "wrong mdp"); 937 IRT_END 938 #endif // ASSERT 939 940 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 941 assert(ProfileInterpreter, "must be profiling interpreter"); 942 ResourceMark rm(thread); 943 HandleMark hm(thread); 944 frame fr = thread->last_frame(); 945 assert(fr.is_interpreted_frame(), "must come from interpreter"); 946 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 947 948 // Grab a lock to ensure atomic access to setting the return bci and 949 // the displacement. This can block and GC, invalidating all naked oops. 950 MutexLocker ml(RetData_lock); 951 952 // ProfileData is essentially a wrapper around a derived oop, so we 953 // need to take the lock before making any ProfileData structures. 954 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 955 RetData* rdata = data->as_RetData(); 956 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 957 fr.interpreter_frame_set_mdp(new_mdp); 958 IRT_END 959 960 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 961 MethodCounters* mcs = Method::build_method_counters(m, thread); 962 if (HAS_PENDING_EXCEPTION) { 963 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 964 CLEAR_PENDING_EXCEPTION; 965 } 966 return mcs; 967 IRT_END 968 969 970 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 971 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 972 // stack traversal automatically takes care of preserving arguments for invoke, so 973 // this is no longer needed. 974 975 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 976 // if this is called during a safepoint 977 978 if (JvmtiExport::should_post_single_step()) { 979 // We are called during regular safepoints and when the VM is 980 // single stepping. If any thread is marked for single stepping, 981 // then we may have JVMTI work to do. 982 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 983 } 984 IRT_END 985 986 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 987 ConstantPoolCacheEntry *cp_entry)) 988 989 // check the access_flags for the field in the klass 990 991 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 992 int index = cp_entry->field_index(); 993 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 994 995 switch(cp_entry->flag_state()) { 996 case btos: // fall through 997 case ctos: // fall through 998 case stos: // fall through 999 case itos: // fall through 1000 case ftos: // fall through 1001 case ltos: // fall through 1002 case dtos: // fall through 1003 case atos: break; 1004 default: ShouldNotReachHere(); return; 1005 } 1006 bool is_static = (obj == NULL); 1007 HandleMark hm(thread); 1008 1009 Handle h_obj; 1010 if (!is_static) { 1011 // non-static field accessors have an object, but we need a handle 1012 h_obj = Handle(thread, obj); 1013 } 1014 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1015 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1016 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1017 IRT_END 1018 1019 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1020 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1021 1022 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1023 1024 // check the access_flags for the field in the klass 1025 InstanceKlass* ik = InstanceKlass::cast(k); 1026 int index = cp_entry->field_index(); 1027 // bail out if field modifications are not watched 1028 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1029 1030 char sig_type = '\0'; 1031 1032 switch(cp_entry->flag_state()) { 1033 case btos: sig_type = 'Z'; break; 1034 case ctos: sig_type = 'C'; break; 1035 case stos: sig_type = 'S'; break; 1036 case itos: sig_type = 'I'; break; 1037 case ftos: sig_type = 'F'; break; 1038 case atos: sig_type = 'L'; break; 1039 case ltos: sig_type = 'J'; break; 1040 case dtos: sig_type = 'D'; break; 1041 default: ShouldNotReachHere(); return; 1042 } 1043 bool is_static = (obj == NULL); 1044 1045 HandleMark hm(thread); 1046 instanceKlassHandle h_klass(thread, k); 1047 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1048 jvalue fvalue; 1049 #ifdef _LP64 1050 fvalue = *value; 1051 #else 1052 // Long/double values are stored unaligned and also noncontiguously with 1053 // tagged stacks. We can't just do a simple assignment even in the non- 1054 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1055 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1056 // We assume that the two halves of longs/doubles are stored in interpreter 1057 // stack slots in platform-endian order. 1058 jlong_accessor u; 1059 jint* newval = (jint*)value; 1060 u.words[0] = newval[0]; 1061 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1062 fvalue.j = u.long_value; 1063 #endif // _LP64 1064 1065 Handle h_obj; 1066 if (!is_static) { 1067 // non-static field accessors have an object, but we need a handle 1068 h_obj = Handle(thread, obj); 1069 } 1070 1071 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1072 fid, sig_type, &fvalue); 1073 IRT_END 1074 1075 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1076 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1077 IRT_END 1078 1079 1080 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1081 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1082 IRT_END 1083 1084 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1085 { 1086 return (Interpreter::contains(pc) ? 1 : 0); 1087 } 1088 IRT_END 1089 1090 1091 // Implementation of SignatureHandlerLibrary 1092 1093 address SignatureHandlerLibrary::set_handler_blob() { 1094 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1095 if (handler_blob == NULL) { 1096 return NULL; 1097 } 1098 address handler = handler_blob->code_begin(); 1099 _handler_blob = handler_blob; 1100 _handler = handler; 1101 return handler; 1102 } 1103 1104 void SignatureHandlerLibrary::initialize() { 1105 if (_fingerprints != NULL) { 1106 return; 1107 } 1108 if (set_handler_blob() == NULL) { 1109 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1110 } 1111 1112 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1113 SignatureHandlerLibrary::buffer_size); 1114 _buffer = bb->code_begin(); 1115 1116 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1117 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1118 } 1119 1120 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1121 address handler = _handler; 1122 int insts_size = buffer->pure_insts_size(); 1123 if (handler + insts_size > _handler_blob->code_end()) { 1124 // get a new handler blob 1125 handler = set_handler_blob(); 1126 } 1127 if (handler != NULL) { 1128 memcpy(handler, buffer->insts_begin(), insts_size); 1129 pd_set_handler(handler); 1130 ICache::invalidate_range(handler, insts_size); 1131 _handler = handler + insts_size; 1132 } 1133 return handler; 1134 } 1135 1136 void SignatureHandlerLibrary::add(methodHandle method) { 1137 if (method->signature_handler() == NULL) { 1138 // use slow signature handler if we can't do better 1139 int handler_index = -1; 1140 // check if we can use customized (fast) signature handler 1141 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1142 // use customized signature handler 1143 MutexLocker mu(SignatureHandlerLibrary_lock); 1144 // make sure data structure is initialized 1145 initialize(); 1146 // lookup method signature's fingerprint 1147 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1148 handler_index = _fingerprints->find(fingerprint); 1149 // create handler if necessary 1150 if (handler_index < 0) { 1151 ResourceMark rm; 1152 ptrdiff_t align_offset = (address) 1153 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1154 CodeBuffer buffer((address)(_buffer + align_offset), 1155 SignatureHandlerLibrary::buffer_size - align_offset); 1156 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1157 // copy into code heap 1158 address handler = set_handler(&buffer); 1159 if (handler == NULL) { 1160 // use slow signature handler 1161 } else { 1162 // debugging suppport 1163 if (PrintSignatureHandlers) { 1164 tty->cr(); 1165 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1166 _handlers->length(), 1167 (method->is_static() ? "static" : "receiver"), 1168 method->name_and_sig_as_C_string(), 1169 fingerprint, 1170 buffer.insts_size()); 1171 Disassembler::decode(handler, handler + buffer.insts_size()); 1172 #ifndef PRODUCT 1173 tty->print_cr(" --- associated result handler ---"); 1174 address rh_begin = Interpreter::result_handler(method()->result_type()); 1175 address rh_end = rh_begin; 1176 while (*(int*)rh_end != 0) { 1177 rh_end += sizeof(int); 1178 } 1179 Disassembler::decode(rh_begin, rh_end); 1180 #endif 1181 } 1182 // add handler to library 1183 _fingerprints->append(fingerprint); 1184 _handlers->append(handler); 1185 // set handler index 1186 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1187 handler_index = _fingerprints->length() - 1; 1188 } 1189 } 1190 // Set handler under SignatureHandlerLibrary_lock 1191 if (handler_index < 0) { 1192 // use generic signature handler 1193 method->set_signature_handler(Interpreter::slow_signature_handler()); 1194 } else { 1195 // set handler 1196 method->set_signature_handler(_handlers->at(handler_index)); 1197 } 1198 } else { 1199 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1200 // use generic signature handler 1201 method->set_signature_handler(Interpreter::slow_signature_handler()); 1202 } 1203 } 1204 #ifdef ASSERT 1205 int handler_index = -1; 1206 int fingerprint_index = -2; 1207 { 1208 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1209 // in any way if accessed from multiple threads. To avoid races with another 1210 // thread which may change the arrays in the above, mutex protected block, we 1211 // have to protect this read access here with the same mutex as well! 1212 MutexLocker mu(SignatureHandlerLibrary_lock); 1213 if (_handlers != NULL) { 1214 handler_index = _handlers->find(method->signature_handler()); 1215 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1216 } 1217 } 1218 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1219 handler_index == fingerprint_index, "sanity check"); 1220 #endif // ASSERT 1221 } 1222 1223 1224 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1225 address SignatureHandlerLibrary::_handler = NULL; 1226 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1227 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1228 address SignatureHandlerLibrary::_buffer = NULL; 1229 1230 1231 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1232 methodHandle m(thread, method); 1233 assert(m->is_native(), "sanity check"); 1234 // lookup native function entry point if it doesn't exist 1235 bool in_base_library; 1236 if (!m->has_native_function()) { 1237 NativeLookup::lookup(m, in_base_library, CHECK); 1238 } 1239 // make sure signature handler is installed 1240 SignatureHandlerLibrary::add(m); 1241 // The interpreter entry point checks the signature handler first, 1242 // before trying to fetch the native entry point and klass mirror. 1243 // We must set the signature handler last, so that multiple processors 1244 // preparing the same method will be sure to see non-null entry & mirror. 1245 IRT_END 1246 1247 #if defined(IA32) || defined(AMD64) || defined(ARM) 1248 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1249 if (src_address == dest_address) { 1250 return; 1251 } 1252 ResetNoHandleMark rnm; // In a LEAF entry. 1253 HandleMark hm; 1254 ResourceMark rm; 1255 frame fr = thread->last_frame(); 1256 assert(fr.is_interpreted_frame(), ""); 1257 jint bci = fr.interpreter_frame_bci(); 1258 methodHandle mh(thread, fr.interpreter_frame_method()); 1259 Bytecode_invoke invoke(mh, bci); 1260 ArgumentSizeComputer asc(invoke.signature()); 1261 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1262 Copy::conjoint_jbytes(src_address, dest_address, 1263 size_of_arguments * Interpreter::stackElementSize); 1264 IRT_END 1265 #endif 1266 1267 #if INCLUDE_JVMTI 1268 // This is a support of the JVMTI PopFrame interface. 1269 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1270 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1271 // The member_name argument is a saved reference (in local#0) to the member_name. 1272 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1273 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1274 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1275 Method* method, address bcp)) 1276 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1277 if (code != Bytecodes::_invokestatic) { 1278 return; 1279 } 1280 ConstantPool* cpool = method->constants(); 1281 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1282 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1283 Symbol* mname = cpool->name_ref_at(cp_index); 1284 1285 if (MethodHandles::has_member_arg(cname, mname)) { 1286 oop member_name_oop = (oop) member_name; 1287 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1288 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1289 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1290 } 1291 thread->set_vm_result(member_name_oop); 1292 } 1293 IRT_END 1294 #endif // INCLUDE_JVMTI