1 /* 2 * Copyright (c) 1997, 2015, 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/javaClasses.inline.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "compiler/compileBroker.hpp" 30 #include "compiler/disassembler.hpp" 31 #include "gc/shared/collectedHeap.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "interpreter/interpreterRuntime.hpp" 34 #include "interpreter/linkResolver.hpp" 35 #include "interpreter/templateTable.hpp" 36 #include "memory/oopFactory.hpp" 37 #include "memory/universe.inline.hpp" 38 #include "oops/constantPool.hpp" 39 #include "oops/instanceKlass.hpp" 40 #include "oops/methodData.hpp" 41 #include "oops/objArrayKlass.hpp" 42 #include "oops/objArrayOop.inline.hpp" 43 #include "oops/oop.inline.hpp" 44 #include "oops/symbol.hpp" 45 #include "prims/jvmtiExport.hpp" 46 #include "prims/nativeLookup.hpp" 47 #include "runtime/atomic.inline.hpp" 48 #include "runtime/biasedLocking.hpp" 49 #include "runtime/compilationPolicy.hpp" 50 #include "runtime/deoptimization.hpp" 51 #include "runtime/fieldDescriptor.hpp" 52 #include "runtime/handles.inline.hpp" 53 #include "runtime/icache.hpp" 54 #include "runtime/interfaceSupport.hpp" 55 #include "runtime/java.hpp" 56 #include "runtime/jfieldIDWorkaround.hpp" 57 #include "runtime/osThread.hpp" 58 #include "runtime/sharedRuntime.hpp" 59 #include "runtime/stubRoutines.hpp" 60 #include "runtime/synchronizer.hpp" 61 #include "runtime/threadCritical.hpp" 62 #include "utilities/events.hpp" 63 #ifdef COMPILER2 64 #include "opto/runtime.hpp" 65 #endif 66 67 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 68 69 class UnlockFlagSaver { 70 private: 71 JavaThread* _thread; 72 bool _do_not_unlock; 73 public: 74 UnlockFlagSaver(JavaThread* t) { 75 _thread = t; 76 _do_not_unlock = t->do_not_unlock_if_synchronized(); 77 t->set_do_not_unlock_if_synchronized(false); 78 } 79 ~UnlockFlagSaver() { 80 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 81 } 82 }; 83 84 //------------------------------------------------------------------------------------------------------------------------ 85 // State accessors 86 87 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 88 last_frame(thread).interpreter_frame_set_bcp(bcp); 89 if (ProfileInterpreter) { 90 // ProfileTraps uses MDOs independently of ProfileInterpreter. 91 // That is why we must check both ProfileInterpreter and mdo != NULL. 92 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 93 if (mdo != NULL) { 94 NEEDS_CLEANUP; 95 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 96 } 97 } 98 } 99 100 //------------------------------------------------------------------------------------------------------------------------ 101 // Constants 102 103 104 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 105 // access constant pool 106 ConstantPool* pool = method(thread)->constants(); 107 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 108 constantTag tag = pool->tag_at(index); 109 110 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 111 Klass* klass = pool->klass_at(index, CHECK); 112 oop java_class = klass->java_mirror(); 113 thread->set_vm_result(java_class); 114 IRT_END 115 116 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 117 assert(bytecode == Bytecodes::_fast_aldc || 118 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 119 ResourceMark rm(thread); 120 methodHandle m (thread, method(thread)); 121 Bytecode_loadconstant ldc(m, bci(thread)); 122 oop result = ldc.resolve_constant(CHECK); 123 #ifdef ASSERT 124 { 125 // The bytecode wrappers aren't GC-safe so construct a new one 126 Bytecode_loadconstant ldc2(m, bci(thread)); 127 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 128 assert(result == coop, "expected result for assembly code"); 129 } 130 #endif 131 thread->set_vm_result(result); 132 } 133 IRT_END 134 135 136 //------------------------------------------------------------------------------------------------------------------------ 137 // Allocation 138 139 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 140 Klass* k_oop = pool->klass_at(index, CHECK); 141 instanceKlassHandle klass (THREAD, k_oop); 142 143 // Make sure we are not instantiating an abstract klass 144 klass->check_valid_for_instantiation(true, CHECK); 145 146 // Make sure klass is initialized 147 klass->initialize(CHECK); 148 149 // At this point the class may not be fully initialized 150 // because of recursive initialization. If it is fully 151 // initialized & has_finalized is not set, we rewrite 152 // it into its fast version (Note: no locking is needed 153 // here since this is an atomic byte write and can be 154 // done more than once). 155 // 156 // Note: In case of classes with has_finalized we don't 157 // rewrite since that saves us an extra check in 158 // the fast version which then would call the 159 // slow version anyway (and do a call back into 160 // Java). 161 // If we have a breakpoint, then we don't rewrite 162 // because the _breakpoint bytecode would be lost. 163 oop obj = klass->allocate_instance(CHECK); 164 thread->set_vm_result(obj); 165 IRT_END 166 167 168 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 169 oop obj = oopFactory::new_typeArray(type, size, CHECK); 170 thread->set_vm_result(obj); 171 IRT_END 172 173 174 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 175 // Note: no oopHandle for pool & klass needed since they are not used 176 // anymore after new_objArray() and no GC can happen before. 177 // (This may have to change if this code changes!) 178 Klass* klass = pool->klass_at(index, CHECK); 179 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 180 thread->set_vm_result(obj); 181 IRT_END 182 183 184 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 185 // We may want to pass in more arguments - could make this slightly faster 186 ConstantPool* constants = method(thread)->constants(); 187 int i = get_index_u2(thread, Bytecodes::_multianewarray); 188 Klass* klass = constants->klass_at(i, CHECK); 189 int nof_dims = number_of_dimensions(thread); 190 assert(klass->is_klass(), "not a class"); 191 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 192 193 // We must create an array of jints to pass to multi_allocate. 194 ResourceMark rm(thread); 195 const int small_dims = 10; 196 jint dim_array[small_dims]; 197 jint *dims = &dim_array[0]; 198 if (nof_dims > small_dims) { 199 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 200 } 201 for (int index = 0; index < nof_dims; index++) { 202 // offset from first_size_address is addressed as local[index] 203 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 204 dims[index] = first_size_address[n]; 205 } 206 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 207 thread->set_vm_result(obj); 208 IRT_END 209 210 211 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 212 assert(obj->is_oop(), "must be a valid oop"); 213 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 214 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 215 IRT_END 216 217 218 // Quicken instance-of and check-cast bytecodes 219 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 220 // Force resolving; quicken the bytecode 221 int which = get_index_u2(thread, Bytecodes::_checkcast); 222 ConstantPool* cpool = method(thread)->constants(); 223 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 224 // program we might have seen an unquick'd bytecode in the interpreter but have another 225 // thread quicken the bytecode before we get here. 226 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 227 Klass* klass = cpool->klass_at(which, CHECK); 228 thread->set_vm_result_2(klass); 229 IRT_END 230 231 232 //------------------------------------------------------------------------------------------------------------------------ 233 // Exceptions 234 235 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 236 methodHandle trap_method, int trap_bci, TRAPS) { 237 if (trap_method.not_null()) { 238 MethodData* trap_mdo = trap_method->method_data(); 239 if (trap_mdo == NULL) { 240 Method::build_interpreter_method_data(trap_method, THREAD); 241 if (HAS_PENDING_EXCEPTION) { 242 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 243 "we expect only an OOM error here"); 244 CLEAR_PENDING_EXCEPTION; 245 } 246 trap_mdo = trap_method->method_data(); 247 // and fall through... 248 } 249 if (trap_mdo != NULL) { 250 // Update per-method count of trap events. The interpreter 251 // is updating the MDO to simulate the effect of compiler traps. 252 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 253 } 254 } 255 } 256 257 // Assume the compiler is (or will be) interested in this event. 258 // If necessary, create an MDO to hold the information, and record it. 259 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 260 assert(ProfileTraps, "call me only if profiling"); 261 methodHandle trap_method(thread, method(thread)); 262 int trap_bci = trap_method->bci_from(bcp(thread)); 263 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 264 } 265 266 #ifdef CC_INTERP 267 // As legacy note_trap, but we have more arguments. 268 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 269 methodHandle trap_method(method); 270 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 271 IRT_END 272 273 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 274 // for each exception. 275 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 276 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 277 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 278 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 279 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 280 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 281 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 282 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 283 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 284 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 285 #endif // CC_INTERP 286 287 288 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 289 // get klass 290 InstanceKlass* klass = InstanceKlass::cast(k); 291 assert(klass->is_initialized(), 292 "this klass should have been initialized during VM initialization"); 293 // create instance - do not call constructor since we may have no 294 // (java) stack space left (should assert constructor is empty) 295 Handle exception; 296 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 297 exception = Handle(THREAD, exception_oop); 298 if (StackTraceInThrowable) { 299 java_lang_Throwable::fill_in_stack_trace(exception); 300 } 301 return exception; 302 } 303 304 // Special handling for stack overflow: since we don't have any (java) stack 305 // space left we use the pre-allocated & pre-initialized StackOverflowError 306 // klass to create an stack overflow error instance. We do not call its 307 // constructor for the same reason (it is empty, anyway). 308 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 309 Handle exception = get_preinitialized_exception( 310 SystemDictionary::StackOverflowError_klass(), 311 CHECK); 312 THROW_HANDLE(exception); 313 IRT_END 314 315 316 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 317 // lookup exception klass 318 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 319 if (ProfileTraps) { 320 if (s == vmSymbols::java_lang_ArithmeticException()) { 321 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 322 } else if (s == vmSymbols::java_lang_NullPointerException()) { 323 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 324 } 325 } 326 // create exception 327 Handle exception = Exceptions::new_exception(thread, s, message); 328 thread->set_vm_result(exception()); 329 IRT_END 330 331 332 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 333 ResourceMark rm(thread); 334 const char* klass_name = obj->klass()->external_name(); 335 // lookup exception klass 336 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 337 if (ProfileTraps) { 338 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 339 } 340 // create exception, with klass name as detail message 341 Handle exception = Exceptions::new_exception(thread, s, klass_name); 342 thread->set_vm_result(exception()); 343 IRT_END 344 345 346 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 347 char message[jintAsStringSize]; 348 // lookup exception klass 349 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 350 if (ProfileTraps) { 351 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 352 } 353 // create exception 354 sprintf(message, "%d", index); 355 THROW_MSG(s, message); 356 IRT_END 357 358 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 359 JavaThread* thread, oopDesc* obj)) 360 361 ResourceMark rm(thread); 362 char* message = SharedRuntime::generate_class_cast_message( 363 thread, obj->klass()->external_name()); 364 365 if (ProfileTraps) { 366 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 367 } 368 369 // create exception 370 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 371 IRT_END 372 373 // exception_handler_for_exception(...) returns the continuation address, 374 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 375 // The exception oop is returned to make sure it is preserved over GC (it 376 // is only on the stack if the exception was thrown explicitly via athrow). 377 // During this operation, the expression stack contains the values for the 378 // bci where the exception happened. If the exception was propagated back 379 // from a call, the expression stack contains the values for the bci at the 380 // invoke w/o arguments (i.e., as if one were inside the call). 381 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 382 383 Handle h_exception(thread, exception); 384 methodHandle h_method (thread, method(thread)); 385 constantPoolHandle h_constants(thread, h_method->constants()); 386 bool should_repeat; 387 int handler_bci; 388 int current_bci = bci(thread); 389 390 if (thread->frames_to_pop_failed_realloc() > 0) { 391 // Allocation of scalar replaced object used in this frame 392 // failed. Unconditionally pop the frame. 393 thread->dec_frames_to_pop_failed_realloc(); 394 thread->set_vm_result(h_exception()); 395 // If the method is synchronized we already unlocked the monitor 396 // during deoptimization so the interpreter needs to skip it when 397 // the frame is popped. 398 thread->set_do_not_unlock_if_synchronized(true); 399 #ifdef CC_INTERP 400 return (address) -1; 401 #else 402 return Interpreter::remove_activation_entry(); 403 #endif 404 } 405 406 // Need to do this check first since when _do_not_unlock_if_synchronized 407 // is set, we don't want to trigger any classloading which may make calls 408 // into java, or surprisingly find a matching exception handler for bci 0 409 // since at this moment the method hasn't been "officially" entered yet. 410 if (thread->do_not_unlock_if_synchronized()) { 411 ResourceMark rm; 412 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 413 thread->set_vm_result(exception); 414 #ifdef CC_INTERP 415 return (address) -1; 416 #else 417 return Interpreter::remove_activation_entry(); 418 #endif 419 } 420 421 do { 422 should_repeat = false; 423 424 // assertions 425 #ifdef ASSERT 426 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 427 assert(h_exception->is_oop(), "just checking"); 428 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 429 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 430 if (ExitVMOnVerifyError) vm_exit(-1); 431 ShouldNotReachHere(); 432 } 433 #endif 434 435 // tracing 436 if (TraceExceptions) { 437 ResourceMark rm(thread); 438 Symbol* message = java_lang_Throwable::detail_message(h_exception()); 439 ttyLocker ttyl; // Lock after getting the detail message 440 if (message != NULL) { 441 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")", 442 h_exception->print_value_string(), message->as_C_string(), 443 (address)h_exception()); 444 } else { 445 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", 446 h_exception->print_value_string(), 447 (address)h_exception()); 448 } 449 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 450 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 451 } 452 // Don't go paging in something which won't be used. 453 // else if (extable->length() == 0) { 454 // // disabled for now - interpreter is not using shortcut yet 455 // // (shortcut is not to call runtime if we have no exception handlers) 456 // // warning("performance bug: should not call runtime if method has no exception handlers"); 457 // } 458 // for AbortVMOnException flag 459 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 460 461 // exception handler lookup 462 KlassHandle h_klass(THREAD, h_exception->klass()); 463 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 464 if (HAS_PENDING_EXCEPTION) { 465 // We threw an exception while trying to find the exception handler. 466 // Transfer the new exception to the exception handle which will 467 // be set into thread local storage, and do another lookup for an 468 // exception handler for this exception, this time starting at the 469 // BCI of the exception handler which caused the exception to be 470 // thrown (bug 4307310). 471 h_exception = Handle(THREAD, PENDING_EXCEPTION); 472 CLEAR_PENDING_EXCEPTION; 473 if (handler_bci >= 0) { 474 current_bci = handler_bci; 475 should_repeat = true; 476 } 477 } 478 } while (should_repeat == true); 479 480 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 481 // time throw or a stack unwinding throw and accordingly notify the debugger 482 if (JvmtiExport::can_post_on_exceptions()) { 483 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 484 } 485 486 #ifdef CC_INTERP 487 address continuation = (address)(intptr_t) handler_bci; 488 #else 489 address continuation = NULL; 490 #endif 491 address handler_pc = NULL; 492 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 493 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 494 // handler in this method, or (b) after a stack overflow there is not yet 495 // enough stack space available to reprotect the stack. 496 #ifndef CC_INTERP 497 continuation = Interpreter::remove_activation_entry(); 498 #endif 499 // Count this for compilation purposes 500 h_method->interpreter_throwout_increment(THREAD); 501 } else { 502 // handler in this method => change bci/bcp to handler bci/bcp and continue there 503 handler_pc = h_method->code_base() + handler_bci; 504 #ifndef CC_INTERP 505 set_bcp_and_mdp(handler_pc, thread); 506 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 507 #endif 508 } 509 // notify debugger of an exception catch 510 // (this is good for exceptions caught in native methods as well) 511 if (JvmtiExport::can_post_on_exceptions()) { 512 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 513 } 514 515 thread->set_vm_result(h_exception()); 516 return continuation; 517 IRT_END 518 519 520 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 521 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 522 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 523 IRT_END 524 525 526 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 527 THROW(vmSymbols::java_lang_AbstractMethodError()); 528 IRT_END 529 530 531 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 532 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 533 IRT_END 534 535 536 //------------------------------------------------------------------------------------------------------------------------ 537 // Fields 538 // 539 540 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 541 Thread* THREAD = thread; 542 // resolve field 543 fieldDescriptor info; 544 constantPoolHandle pool(thread, method(thread)->constants()); 545 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 546 bytecode == Bytecodes::_putstatic); 547 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 548 549 { 550 JvmtiHideSingleStepping jhss(thread); 551 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 552 bytecode, CHECK); 553 } // end JvmtiHideSingleStepping 554 555 // check if link resolution caused cpCache to be updated 556 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 557 if (cp_cache_entry->is_resolved(bytecode)) return; 558 559 // compute auxiliary field attributes 560 TosState state = as_TosState(info.field_type()); 561 562 // We need to delay resolving put instructions on final fields 563 // until we actually invoke one. This is required so we throw 564 // exceptions at the correct place. If we do not resolve completely 565 // in the current pass, leaving the put_code set to zero will 566 // cause the next put instruction to reresolve. 567 Bytecodes::Code put_code = (Bytecodes::Code)0; 568 569 // We also need to delay resolving getstatic instructions until the 570 // class is intitialized. This is required so that access to the static 571 // field will call the initialization function every time until the class 572 // is completely initialized ala. in 2.17.5 in JVM Specification. 573 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 574 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 575 !klass->is_initialized()); 576 Bytecodes::Code get_code = (Bytecodes::Code)0; 577 578 if (!uninitialized_static) { 579 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 580 if (is_put || !info.access_flags().is_final()) { 581 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 582 } 583 } 584 585 cp_cache_entry->set_field( 586 get_code, 587 put_code, 588 info.field_holder(), 589 info.index(), 590 info.offset(), 591 state, 592 info.access_flags().is_final(), 593 info.access_flags().is_volatile(), 594 pool->pool_holder() 595 ); 596 } 597 598 599 //------------------------------------------------------------------------------------------------------------------------ 600 // Synchronization 601 // 602 // The interpreter's synchronization code is factored out so that it can 603 // be shared by method invocation and synchronized blocks. 604 //%note synchronization_3 605 606 //%note monitor_1 607 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 608 #ifdef ASSERT 609 thread->last_frame().interpreter_frame_verify_monitor(elem); 610 #endif 611 if (PrintBiasedLockingStatistics) { 612 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 613 } 614 Handle h_obj(thread, elem->obj()); 615 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 616 "must be NULL or an object"); 617 if (UseBiasedLocking) { 618 // Retry fast entry if bias is revoked to avoid unnecessary inflation 619 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 620 } else { 621 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 622 } 623 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 624 "must be NULL or an object"); 625 #ifdef ASSERT 626 thread->last_frame().interpreter_frame_verify_monitor(elem); 627 #endif 628 IRT_END 629 630 631 //%note monitor_1 632 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 633 #ifdef ASSERT 634 thread->last_frame().interpreter_frame_verify_monitor(elem); 635 #endif 636 Handle h_obj(thread, elem->obj()); 637 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 638 "must be NULL or an object"); 639 if (elem == NULL || h_obj()->is_unlocked()) { 640 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 641 } 642 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 643 // Free entry. This must be done here, since a pending exception might be installed on 644 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 645 elem->set_obj(NULL); 646 #ifdef ASSERT 647 thread->last_frame().interpreter_frame_verify_monitor(elem); 648 #endif 649 IRT_END 650 651 652 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 653 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 654 IRT_END 655 656 657 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 658 // Returns an illegal exception to install into the current thread. The 659 // pending_exception flag is cleared so normal exception handling does not 660 // trigger. Any current installed exception will be overwritten. This 661 // method will be called during an exception unwind. 662 663 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 664 Handle exception(thread, thread->vm_result()); 665 assert(exception() != NULL, "vm result should be set"); 666 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 667 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 668 exception = get_preinitialized_exception( 669 SystemDictionary::IllegalMonitorStateException_klass(), 670 CATCH); 671 } 672 thread->set_vm_result(exception()); 673 IRT_END 674 675 676 //------------------------------------------------------------------------------------------------------------------------ 677 // Invokes 678 679 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 680 return method->orig_bytecode_at(method->bci_from(bcp)); 681 IRT_END 682 683 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 684 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 685 IRT_END 686 687 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 688 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 689 IRT_END 690 691 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 692 Thread* THREAD = thread; 693 // extract receiver from the outgoing argument list if necessary 694 Handle receiver(thread, NULL); 695 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 696 ResourceMark rm(thread); 697 methodHandle m (thread, method(thread)); 698 Bytecode_invoke call(m, bci(thread)); 699 Symbol* signature = call.signature(); 700 receiver = Handle(thread, 701 thread->last_frame().interpreter_callee_receiver(signature)); 702 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 703 "sanity check"); 704 assert(receiver.is_null() || 705 !Universe::heap()->is_in_reserved(receiver->klass()), 706 "sanity check"); 707 } 708 709 // resolve method 710 CallInfo info; 711 constantPoolHandle pool(thread, method(thread)->constants()); 712 713 { 714 JvmtiHideSingleStepping jhss(thread); 715 LinkResolver::resolve_invoke(info, receiver, pool, 716 get_index_u2_cpcache(thread, bytecode), bytecode, 717 CHECK); 718 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 719 int retry_count = 0; 720 while (info.resolved_method()->is_old()) { 721 // It is very unlikely that method is redefined more than 100 times 722 // in the middle of resolve. If it is looping here more than 100 times 723 // means then there could be a bug here. 724 guarantee((retry_count++ < 100), 725 "Could not resolve to latest version of redefined method"); 726 // method is redefined in the middle of resolve so re-try. 727 LinkResolver::resolve_invoke(info, receiver, pool, 728 get_index_u2_cpcache(thread, bytecode), bytecode, 729 CHECK); 730 } 731 } 732 } // end JvmtiHideSingleStepping 733 734 // check if link resolution caused cpCache to be updated 735 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 736 if (cp_cache_entry->is_resolved(bytecode)) return; 737 738 if (bytecode == Bytecodes::_invokeinterface) { 739 if (TraceItables && Verbose) { 740 ResourceMark rm(thread); 741 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 742 } 743 } 744 #ifdef ASSERT 745 if (bytecode == Bytecodes::_invokeinterface) { 746 if (info.resolved_method()->method_holder() == 747 SystemDictionary::Object_klass()) { 748 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 749 // (see also CallInfo::set_interface for details) 750 assert(info.call_kind() == CallInfo::vtable_call || 751 info.call_kind() == CallInfo::direct_call, ""); 752 methodHandle rm = info.resolved_method(); 753 assert(rm->is_final() || info.has_vtable_index(), 754 "should have been set already"); 755 } else if (!info.resolved_method()->has_itable_index()) { 756 // Resolved something like CharSequence.toString. Use vtable not itable. 757 assert(info.call_kind() != CallInfo::itable_call, ""); 758 } else { 759 // Setup itable entry 760 assert(info.call_kind() == CallInfo::itable_call, ""); 761 int index = info.resolved_method()->itable_index(); 762 assert(info.itable_index() == index, ""); 763 } 764 } else { 765 assert(info.call_kind() == CallInfo::direct_call || 766 info.call_kind() == CallInfo::vtable_call, ""); 767 } 768 #endif 769 switch (info.call_kind()) { 770 case CallInfo::direct_call: 771 cp_cache_entry->set_direct_call( 772 bytecode, 773 info.resolved_method()); 774 break; 775 case CallInfo::vtable_call: 776 cp_cache_entry->set_vtable_call( 777 bytecode, 778 info.resolved_method(), 779 info.vtable_index()); 780 break; 781 case CallInfo::itable_call: 782 cp_cache_entry->set_itable_call( 783 bytecode, 784 info.resolved_method(), 785 info.itable_index()); 786 break; 787 default: ShouldNotReachHere(); 788 } 789 } 790 791 792 // First time execution: Resolve symbols, create a permanent MethodType object. 793 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 794 Thread* THREAD = thread; 795 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 796 797 // resolve method 798 CallInfo info; 799 constantPoolHandle pool(thread, method(thread)->constants()); 800 { 801 JvmtiHideSingleStepping jhss(thread); 802 LinkResolver::resolve_invoke(info, Handle(), pool, 803 get_index_u2_cpcache(thread, bytecode), bytecode, 804 CHECK); 805 } // end JvmtiHideSingleStepping 806 807 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 808 cp_cache_entry->set_method_handle(pool, info); 809 } 810 811 // First time execution: Resolve symbols, create a permanent CallSite object. 812 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 813 Thread* THREAD = thread; 814 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 815 816 //TO DO: consider passing BCI to Java. 817 // int caller_bci = method(thread)->bci_from(bcp(thread)); 818 819 // resolve method 820 CallInfo info; 821 constantPoolHandle pool(thread, method(thread)->constants()); 822 int index = get_index_u4(thread, bytecode); 823 { 824 JvmtiHideSingleStepping jhss(thread); 825 LinkResolver::resolve_invoke(info, Handle(), pool, 826 index, bytecode, CHECK); 827 } // end JvmtiHideSingleStepping 828 829 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 830 cp_cache_entry->set_dynamic_call(pool, info); 831 } 832 833 // This function is the interface to the assembly code. It returns the resolved 834 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 835 // This function will check for redefinition! 836 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 837 switch (bytecode) { 838 case Bytecodes::_getstatic: 839 case Bytecodes::_putstatic: 840 case Bytecodes::_getfield: 841 case Bytecodes::_putfield: 842 resolve_get_put(thread, bytecode); 843 break; 844 case Bytecodes::_invokevirtual: 845 case Bytecodes::_invokespecial: 846 case Bytecodes::_invokestatic: 847 case Bytecodes::_invokeinterface: 848 resolve_invoke(thread, bytecode); 849 break; 850 case Bytecodes::_invokehandle: 851 resolve_invokehandle(thread); 852 break; 853 case Bytecodes::_invokedynamic: 854 resolve_invokedynamic(thread); 855 break; 856 default: 857 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(bytecode))); 858 break; 859 } 860 } 861 IRT_END 862 863 //------------------------------------------------------------------------------------------------------------------------ 864 // Miscellaneous 865 866 867 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 868 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 869 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 870 if (branch_bcp != NULL && nm != NULL) { 871 // This was a successful request for an OSR nmethod. Because 872 // frequency_counter_overflow_inner ends with a safepoint check, 873 // nm could have been unloaded so look it up again. It's unsafe 874 // to examine nm directly since it might have been freed and used 875 // for something else. 876 frame fr = thread->last_frame(); 877 Method* method = fr.interpreter_frame_method(); 878 int bci = method->bci_from(fr.interpreter_frame_bcp()); 879 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 880 } 881 #ifndef PRODUCT 882 if (TraceOnStackReplacement) { 883 if (nm != NULL) { 884 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 885 nm->print(); 886 } 887 } 888 #endif 889 return nm; 890 } 891 892 IRT_ENTRY(nmethod*, 893 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 894 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 895 // flag, in case this method triggers classloading which will call into Java. 896 UnlockFlagSaver fs(thread); 897 898 frame fr = thread->last_frame(); 899 assert(fr.is_interpreted_frame(), "must come from interpreter"); 900 methodHandle method(thread, fr.interpreter_frame_method()); 901 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 902 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 903 904 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 905 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 906 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 907 908 if (osr_nm != NULL) { 909 // We may need to do on-stack replacement which requires that no 910 // monitors in the activation are biased because their 911 // BasicObjectLocks will need to migrate during OSR. Force 912 // unbiasing of all monitors in the activation now (even though 913 // the OSR nmethod might be invalidated) because we don't have a 914 // safepoint opportunity later once the migration begins. 915 if (UseBiasedLocking) { 916 ResourceMark rm; 917 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 918 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 919 kptr < fr.interpreter_frame_monitor_begin(); 920 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 921 if( kptr->obj() != NULL ) { 922 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 923 } 924 } 925 BiasedLocking::revoke(objects_to_revoke); 926 } 927 } 928 return osr_nm; 929 IRT_END 930 931 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 932 assert(ProfileInterpreter, "must be profiling interpreter"); 933 int bci = method->bci_from(cur_bcp); 934 MethodData* mdo = method->method_data(); 935 if (mdo == NULL) return 0; 936 return mdo->bci_to_di(bci); 937 IRT_END 938 939 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 940 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 941 // flag, in case this method triggers classloading which will call into Java. 942 UnlockFlagSaver fs(thread); 943 944 assert(ProfileInterpreter, "must be profiling interpreter"); 945 frame fr = thread->last_frame(); 946 assert(fr.is_interpreted_frame(), "must come from interpreter"); 947 methodHandle method(thread, fr.interpreter_frame_method()); 948 Method::build_interpreter_method_data(method, THREAD); 949 if (HAS_PENDING_EXCEPTION) { 950 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 951 CLEAR_PENDING_EXCEPTION; 952 // and fall through... 953 } 954 IRT_END 955 956 957 #ifdef ASSERT 958 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 959 assert(ProfileInterpreter, "must be profiling interpreter"); 960 961 MethodData* mdo = method->method_data(); 962 assert(mdo != NULL, "must not be null"); 963 964 int bci = method->bci_from(bcp); 965 966 address mdp2 = mdo->bci_to_dp(bci); 967 if (mdp != mdp2) { 968 ResourceMark rm; 969 ResetNoHandleMark rnm; // In a LEAF entry. 970 HandleMark hm; 971 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 972 int current_di = mdo->dp_to_di(mdp); 973 int expected_di = mdo->dp_to_di(mdp2); 974 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 975 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 976 int approx_bci = -1; 977 if (current_di >= 0) { 978 approx_bci = mdo->data_at(current_di)->bci(); 979 } 980 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 981 mdo->print_on(tty); 982 method->print_codes(); 983 } 984 assert(mdp == mdp2, "wrong mdp"); 985 IRT_END 986 #endif // ASSERT 987 988 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 989 assert(ProfileInterpreter, "must be profiling interpreter"); 990 ResourceMark rm(thread); 991 HandleMark hm(thread); 992 frame fr = thread->last_frame(); 993 assert(fr.is_interpreted_frame(), "must come from interpreter"); 994 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 995 996 // Grab a lock to ensure atomic access to setting the return bci and 997 // the displacement. This can block and GC, invalidating all naked oops. 998 MutexLocker ml(RetData_lock); 999 1000 // ProfileData is essentially a wrapper around a derived oop, so we 1001 // need to take the lock before making any ProfileData structures. 1002 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 1003 RetData* rdata = data->as_RetData(); 1004 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1005 fr.interpreter_frame_set_mdp(new_mdp); 1006 IRT_END 1007 1008 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1009 MethodCounters* mcs = Method::build_method_counters(m, thread); 1010 if (HAS_PENDING_EXCEPTION) { 1011 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1012 CLEAR_PENDING_EXCEPTION; 1013 } 1014 return mcs; 1015 IRT_END 1016 1017 1018 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1019 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1020 // stack traversal automatically takes care of preserving arguments for invoke, so 1021 // this is no longer needed. 1022 1023 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1024 // if this is called during a safepoint 1025 1026 if (JvmtiExport::should_post_single_step()) { 1027 // We are called during regular safepoints and when the VM is 1028 // single stepping. If any thread is marked for single stepping, 1029 // then we may have JVMTI work to do. 1030 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1031 } 1032 IRT_END 1033 1034 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1035 ConstantPoolCacheEntry *cp_entry)) 1036 1037 // check the access_flags for the field in the klass 1038 1039 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1040 int index = cp_entry->field_index(); 1041 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1042 1043 bool is_static = (obj == NULL); 1044 HandleMark hm(thread); 1045 1046 Handle h_obj; 1047 if (!is_static) { 1048 // non-static field accessors have an object, but we need a handle 1049 h_obj = Handle(thread, obj); 1050 } 1051 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1052 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1053 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1054 IRT_END 1055 1056 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1057 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1058 1059 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1060 1061 // check the access_flags for the field in the klass 1062 InstanceKlass* ik = InstanceKlass::cast(k); 1063 int index = cp_entry->field_index(); 1064 // bail out if field modifications are not watched 1065 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1066 1067 char sig_type = '\0'; 1068 1069 switch(cp_entry->flag_state()) { 1070 case btos: sig_type = 'Z'; break; 1071 case ctos: sig_type = 'C'; break; 1072 case stos: sig_type = 'S'; break; 1073 case itos: sig_type = 'I'; break; 1074 case ftos: sig_type = 'F'; break; 1075 case atos: sig_type = 'L'; break; 1076 case ltos: sig_type = 'J'; break; 1077 case dtos: sig_type = 'D'; break; 1078 default: ShouldNotReachHere(); return; 1079 } 1080 bool is_static = (obj == NULL); 1081 1082 HandleMark hm(thread); 1083 instanceKlassHandle h_klass(thread, k); 1084 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1085 jvalue fvalue; 1086 #ifdef _LP64 1087 fvalue = *value; 1088 #else 1089 // Long/double values are stored unaligned and also noncontiguously with 1090 // tagged stacks. We can't just do a simple assignment even in the non- 1091 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1092 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1093 // We assume that the two halves of longs/doubles are stored in interpreter 1094 // stack slots in platform-endian order. 1095 jlong_accessor u; 1096 jint* newval = (jint*)value; 1097 u.words[0] = newval[0]; 1098 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1099 fvalue.j = u.long_value; 1100 #endif // _LP64 1101 1102 Handle h_obj; 1103 if (!is_static) { 1104 // non-static field accessors have an object, but we need a handle 1105 h_obj = Handle(thread, obj); 1106 } 1107 1108 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1109 fid, sig_type, &fvalue); 1110 IRT_END 1111 1112 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1113 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1114 IRT_END 1115 1116 1117 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1118 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1119 IRT_END 1120 1121 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1122 { 1123 return (Interpreter::contains(pc) ? 1 : 0); 1124 } 1125 IRT_END 1126 1127 1128 // Implementation of SignatureHandlerLibrary 1129 1130 address SignatureHandlerLibrary::set_handler_blob() { 1131 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1132 if (handler_blob == NULL) { 1133 return NULL; 1134 } 1135 address handler = handler_blob->code_begin(); 1136 _handler_blob = handler_blob; 1137 _handler = handler; 1138 return handler; 1139 } 1140 1141 void SignatureHandlerLibrary::initialize() { 1142 if (_fingerprints != NULL) { 1143 return; 1144 } 1145 if (set_handler_blob() == NULL) { 1146 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1147 } 1148 1149 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1150 SignatureHandlerLibrary::buffer_size); 1151 _buffer = bb->code_begin(); 1152 1153 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1154 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1155 } 1156 1157 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1158 address handler = _handler; 1159 int insts_size = buffer->pure_insts_size(); 1160 if (handler + insts_size > _handler_blob->code_end()) { 1161 // get a new handler blob 1162 handler = set_handler_blob(); 1163 } 1164 if (handler != NULL) { 1165 memcpy(handler, buffer->insts_begin(), insts_size); 1166 pd_set_handler(handler); 1167 ICache::invalidate_range(handler, insts_size); 1168 _handler = handler + insts_size; 1169 } 1170 return handler; 1171 } 1172 1173 void SignatureHandlerLibrary::add(methodHandle method) { 1174 if (method->signature_handler() == NULL) { 1175 // use slow signature handler if we can't do better 1176 int handler_index = -1; 1177 // check if we can use customized (fast) signature handler 1178 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1179 // use customized signature handler 1180 MutexLocker mu(SignatureHandlerLibrary_lock); 1181 // make sure data structure is initialized 1182 initialize(); 1183 // lookup method signature's fingerprint 1184 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1185 handler_index = _fingerprints->find(fingerprint); 1186 // create handler if necessary 1187 if (handler_index < 0) { 1188 ResourceMark rm; 1189 ptrdiff_t align_offset = (address) 1190 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1191 CodeBuffer buffer((address)(_buffer + align_offset), 1192 SignatureHandlerLibrary::buffer_size - align_offset); 1193 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1194 // copy into code heap 1195 address handler = set_handler(&buffer); 1196 if (handler == NULL) { 1197 // use slow signature handler 1198 } else { 1199 // debugging suppport 1200 if (PrintSignatureHandlers) { 1201 tty->cr(); 1202 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1203 _handlers->length(), 1204 (method->is_static() ? "static" : "receiver"), 1205 method->name_and_sig_as_C_string(), 1206 fingerprint, 1207 buffer.insts_size()); 1208 Disassembler::decode(handler, handler + buffer.insts_size()); 1209 #ifndef PRODUCT 1210 tty->print_cr(" --- associated result handler ---"); 1211 address rh_begin = Interpreter::result_handler(method()->result_type()); 1212 address rh_end = rh_begin; 1213 while (*(int*)rh_end != 0) { 1214 rh_end += sizeof(int); 1215 } 1216 Disassembler::decode(rh_begin, rh_end); 1217 #endif 1218 } 1219 // add handler to library 1220 _fingerprints->append(fingerprint); 1221 _handlers->append(handler); 1222 // set handler index 1223 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1224 handler_index = _fingerprints->length() - 1; 1225 } 1226 } 1227 // Set handler under SignatureHandlerLibrary_lock 1228 if (handler_index < 0) { 1229 // use generic signature handler 1230 method->set_signature_handler(Interpreter::slow_signature_handler()); 1231 } else { 1232 // set handler 1233 method->set_signature_handler(_handlers->at(handler_index)); 1234 } 1235 } else { 1236 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1237 // use generic signature handler 1238 method->set_signature_handler(Interpreter::slow_signature_handler()); 1239 } 1240 } 1241 #ifdef ASSERT 1242 int handler_index = -1; 1243 int fingerprint_index = -2; 1244 { 1245 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1246 // in any way if accessed from multiple threads. To avoid races with another 1247 // thread which may change the arrays in the above, mutex protected block, we 1248 // have to protect this read access here with the same mutex as well! 1249 MutexLocker mu(SignatureHandlerLibrary_lock); 1250 if (_handlers != NULL) { 1251 handler_index = _handlers->find(method->signature_handler()); 1252 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1253 } 1254 } 1255 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1256 handler_index == fingerprint_index, "sanity check"); 1257 #endif // ASSERT 1258 } 1259 1260 1261 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1262 address SignatureHandlerLibrary::_handler = NULL; 1263 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1264 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1265 address SignatureHandlerLibrary::_buffer = NULL; 1266 1267 1268 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1269 methodHandle m(thread, method); 1270 assert(m->is_native(), "sanity check"); 1271 // lookup native function entry point if it doesn't exist 1272 bool in_base_library; 1273 if (!m->has_native_function()) { 1274 NativeLookup::lookup(m, in_base_library, CHECK); 1275 } 1276 // make sure signature handler is installed 1277 SignatureHandlerLibrary::add(m); 1278 // The interpreter entry point checks the signature handler first, 1279 // before trying to fetch the native entry point and klass mirror. 1280 // We must set the signature handler last, so that multiple processors 1281 // preparing the same method will be sure to see non-null entry & mirror. 1282 IRT_END 1283 1284 #if defined(IA32) || defined(AMD64) || defined(ARM) 1285 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1286 if (src_address == dest_address) { 1287 return; 1288 } 1289 ResetNoHandleMark rnm; // In a LEAF entry. 1290 HandleMark hm; 1291 ResourceMark rm; 1292 frame fr = thread->last_frame(); 1293 assert(fr.is_interpreted_frame(), ""); 1294 jint bci = fr.interpreter_frame_bci(); 1295 methodHandle mh(thread, fr.interpreter_frame_method()); 1296 Bytecode_invoke invoke(mh, bci); 1297 ArgumentSizeComputer asc(invoke.signature()); 1298 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1299 Copy::conjoint_jbytes(src_address, dest_address, 1300 size_of_arguments * Interpreter::stackElementSize); 1301 IRT_END 1302 #endif 1303 1304 #if INCLUDE_JVMTI 1305 // This is a support of the JVMTI PopFrame interface. 1306 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1307 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1308 // The member_name argument is a saved reference (in local#0) to the member_name. 1309 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1310 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1311 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1312 Method* method, address bcp)) 1313 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1314 if (code != Bytecodes::_invokestatic) { 1315 return; 1316 } 1317 ConstantPool* cpool = method->constants(); 1318 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1319 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1320 Symbol* mname = cpool->name_ref_at(cp_index); 1321 1322 if (MethodHandles::has_member_arg(cname, mname)) { 1323 oop member_name_oop = (oop) member_name; 1324 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1325 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1326 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1327 } 1328 thread->set_vm_result(member_name_oop); 1329 } else { 1330 thread->set_vm_result(NULL); 1331 } 1332 IRT_END 1333 #endif // INCLUDE_JVMTI