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 "code/codeCache.hpp" 30 #include "code/codeCacheExtensions.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/disassembler.hpp" 33 #include "gc/shared/collectedHeap.hpp" 34 #include "interpreter/interpreter.hpp" 35 #include "interpreter/interpreterRuntime.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "interpreter/templateTable.hpp" 38 #include "memory/oopFactory.hpp" 39 #include "memory/universe.inline.hpp" 40 #include "oops/constantPool.hpp" 41 #include "oops/instanceKlass.hpp" 42 #include "oops/methodData.hpp" 43 #include "oops/objArrayKlass.hpp" 44 #include "oops/objArrayOop.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "oops/symbol.hpp" 47 #include "prims/jvmtiExport.hpp" 48 #include "prims/nativeLookup.hpp" 49 #include "runtime/atomic.inline.hpp" 50 #include "runtime/biasedLocking.hpp" 51 #include "runtime/compilationPolicy.hpp" 52 #include "runtime/deoptimization.hpp" 53 #include "runtime/fieldDescriptor.hpp" 54 #include "runtime/handles.inline.hpp" 55 #include "runtime/icache.hpp" 56 #include "runtime/interfaceSupport.hpp" 57 #include "runtime/java.hpp" 58 #include "runtime/jfieldIDWorkaround.hpp" 59 #include "runtime/osThread.hpp" 60 #include "runtime/sharedRuntime.hpp" 61 #include "runtime/stubRoutines.hpp" 62 #include "runtime/synchronizer.hpp" 63 #include "runtime/threadCritical.hpp" 64 #include "utilities/events.hpp" 65 #ifdef COMPILER2 66 #include "opto/runtime.hpp" 67 #endif 68 69 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 70 71 class UnlockFlagSaver { 72 private: 73 JavaThread* _thread; 74 bool _do_not_unlock; 75 public: 76 UnlockFlagSaver(JavaThread* t) { 77 _thread = t; 78 _do_not_unlock = t->do_not_unlock_if_synchronized(); 79 t->set_do_not_unlock_if_synchronized(false); 80 } 81 ~UnlockFlagSaver() { 82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 83 } 84 }; 85 86 //------------------------------------------------------------------------------------------------------------------------ 87 // State accessors 88 89 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 90 last_frame(thread).interpreter_frame_set_bcp(bcp); 91 if (ProfileInterpreter) { 92 // ProfileTraps uses MDOs independently of ProfileInterpreter. 93 // That is why we must check both ProfileInterpreter and mdo != NULL. 94 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 95 if (mdo != NULL) { 96 NEEDS_CLEANUP; 97 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 98 } 99 } 100 } 101 102 //------------------------------------------------------------------------------------------------------------------------ 103 // Constants 104 105 106 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 107 // access constant pool 108 ConstantPool* pool = method(thread)->constants(); 109 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 110 constantTag tag = pool->tag_at(index); 111 112 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 113 Klass* klass = pool->klass_at(index, CHECK); 114 oop java_class = klass->java_mirror(); 115 thread->set_vm_result(java_class); 116 IRT_END 117 118 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 119 assert(bytecode == Bytecodes::_fast_aldc || 120 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 121 ResourceMark rm(thread); 122 methodHandle m (thread, method(thread)); 123 Bytecode_loadconstant ldc(m, bci(thread)); 124 oop result = ldc.resolve_constant(CHECK); 125 #ifdef ASSERT 126 { 127 // The bytecode wrappers aren't GC-safe so construct a new one 128 Bytecode_loadconstant ldc2(m, bci(thread)); 129 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 130 assert(result == coop, "expected result for assembly code"); 131 } 132 #endif 133 thread->set_vm_result(result); 134 } 135 IRT_END 136 137 138 //------------------------------------------------------------------------------------------------------------------------ 139 // Allocation 140 141 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 142 Klass* k_oop = pool->klass_at(index, CHECK); 143 instanceKlassHandle klass (THREAD, k_oop); 144 145 // Make sure we are not instantiating an abstract klass 146 klass->check_valid_for_instantiation(true, CHECK); 147 148 // Make sure klass is initialized 149 klass->initialize(CHECK); 150 151 // At this point the class may not be fully initialized 152 // because of recursive initialization. If it is fully 153 // initialized & has_finalized is not set, we rewrite 154 // it into its fast version (Note: no locking is needed 155 // here since this is an atomic byte write and can be 156 // done more than once). 157 // 158 // Note: In case of classes with has_finalized we don't 159 // rewrite since that saves us an extra check in 160 // the fast version which then would call the 161 // slow version anyway (and do a call back into 162 // Java). 163 // If we have a breakpoint, then we don't rewrite 164 // because the _breakpoint bytecode would be lost. 165 oop obj = klass->allocate_instance(CHECK); 166 thread->set_vm_result(obj); 167 IRT_END 168 169 170 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 171 oop obj = oopFactory::new_typeArray(type, size, CHECK); 172 thread->set_vm_result(obj); 173 IRT_END 174 175 176 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 177 // Note: no oopHandle for pool & klass needed since they are not used 178 // anymore after new_objArray() and no GC can happen before. 179 // (This may have to change if this code changes!) 180 Klass* klass = pool->klass_at(index, CHECK); 181 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 182 thread->set_vm_result(obj); 183 IRT_END 184 185 186 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 187 // We may want to pass in more arguments - could make this slightly faster 188 ConstantPool* constants = method(thread)->constants(); 189 int i = get_index_u2(thread, Bytecodes::_multianewarray); 190 Klass* klass = constants->klass_at(i, CHECK); 191 int nof_dims = number_of_dimensions(thread); 192 assert(klass->is_klass(), "not a class"); 193 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 194 195 // We must create an array of jints to pass to multi_allocate. 196 ResourceMark rm(thread); 197 const int small_dims = 10; 198 jint dim_array[small_dims]; 199 jint *dims = &dim_array[0]; 200 if (nof_dims > small_dims) { 201 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 202 } 203 for (int index = 0; index < nof_dims; index++) { 204 // offset from first_size_address is addressed as local[index] 205 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 206 dims[index] = first_size_address[n]; 207 } 208 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 209 thread->set_vm_result(obj); 210 IRT_END 211 212 213 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 214 assert(obj->is_oop(), "must be a valid oop"); 215 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 216 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 217 IRT_END 218 219 220 // Quicken instance-of and check-cast bytecodes 221 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 222 // Force resolving; quicken the bytecode 223 int which = get_index_u2(thread, Bytecodes::_checkcast); 224 ConstantPool* cpool = method(thread)->constants(); 225 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 226 // program we might have seen an unquick'd bytecode in the interpreter but have another 227 // thread quicken the bytecode before we get here. 228 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 229 Klass* klass = cpool->klass_at(which, CHECK); 230 thread->set_vm_result_2(klass); 231 IRT_END 232 233 234 //------------------------------------------------------------------------------------------------------------------------ 235 // Exceptions 236 237 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 238 methodHandle trap_method, int trap_bci, TRAPS) { 239 if (trap_method.not_null()) { 240 MethodData* trap_mdo = trap_method->method_data(); 241 if (trap_mdo == NULL) { 242 Method::build_interpreter_method_data(trap_method, THREAD); 243 if (HAS_PENDING_EXCEPTION) { 244 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 245 "we expect only an OOM error here"); 246 CLEAR_PENDING_EXCEPTION; 247 } 248 trap_mdo = trap_method->method_data(); 249 // and fall through... 250 } 251 if (trap_mdo != NULL) { 252 // Update per-method count of trap events. The interpreter 253 // is updating the MDO to simulate the effect of compiler traps. 254 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 255 } 256 } 257 } 258 259 // Assume the compiler is (or will be) interested in this event. 260 // If necessary, create an MDO to hold the information, and record it. 261 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 262 assert(ProfileTraps, "call me only if profiling"); 263 methodHandle trap_method(thread, method(thread)); 264 int trap_bci = trap_method->bci_from(bcp(thread)); 265 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 266 } 267 268 #ifdef CC_INTERP 269 // As legacy note_trap, but we have more arguments. 270 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 271 methodHandle trap_method(method); 272 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 273 IRT_END 274 275 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 276 // for each exception. 277 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 278 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 279 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 280 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 281 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 282 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 283 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 284 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 285 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 286 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 287 #endif // CC_INTERP 288 289 290 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 291 // get klass 292 InstanceKlass* klass = InstanceKlass::cast(k); 293 assert(klass->is_initialized(), 294 "this klass should have been initialized during VM initialization"); 295 // create instance - do not call constructor since we may have no 296 // (java) stack space left (should assert constructor is empty) 297 Handle exception; 298 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 299 exception = Handle(THREAD, exception_oop); 300 if (StackTraceInThrowable) { 301 java_lang_Throwable::fill_in_stack_trace(exception); 302 } 303 return exception; 304 } 305 306 // Special handling for stack overflow: since we don't have any (java) stack 307 // space left we use the pre-allocated & pre-initialized StackOverflowError 308 // klass to create an stack overflow error instance. We do not call its 309 // constructor for the same reason (it is empty, anyway). 310 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 311 Handle exception = get_preinitialized_exception( 312 SystemDictionary::StackOverflowError_klass(), 313 CHECK); 314 // Increment counter for hs_err file reporting 315 Atomic::inc(&Exceptions::_stack_overflow_errors); 316 THROW_HANDLE(exception); 317 IRT_END 318 319 320 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 321 // lookup exception klass 322 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 323 if (ProfileTraps) { 324 if (s == vmSymbols::java_lang_ArithmeticException()) { 325 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 326 } else if (s == vmSymbols::java_lang_NullPointerException()) { 327 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 328 } 329 } 330 // create exception 331 Handle exception = Exceptions::new_exception(thread, s, message); 332 thread->set_vm_result(exception()); 333 IRT_END 334 335 336 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 337 ResourceMark rm(thread); 338 const char* klass_name = obj->klass()->external_name(); 339 // lookup exception klass 340 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 341 if (ProfileTraps) { 342 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 343 } 344 // create exception, with klass name as detail message 345 Handle exception = Exceptions::new_exception(thread, s, klass_name); 346 thread->set_vm_result(exception()); 347 IRT_END 348 349 350 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 351 char message[jintAsStringSize]; 352 // lookup exception klass 353 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 354 if (ProfileTraps) { 355 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 356 } 357 // create exception 358 sprintf(message, "%d", index); 359 THROW_MSG(s, message); 360 IRT_END 361 362 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 363 JavaThread* thread, oopDesc* obj)) 364 365 ResourceMark rm(thread); 366 char* message = SharedRuntime::generate_class_cast_message( 367 thread, obj->klass()->external_name()); 368 369 if (ProfileTraps) { 370 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 371 } 372 373 // create exception 374 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 375 IRT_END 376 377 // exception_handler_for_exception(...) returns the continuation address, 378 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 379 // The exception oop is returned to make sure it is preserved over GC (it 380 // is only on the stack if the exception was thrown explicitly via athrow). 381 // During this operation, the expression stack contains the values for the 382 // bci where the exception happened. If the exception was propagated back 383 // from a call, the expression stack contains the values for the bci at the 384 // invoke w/o arguments (i.e., as if one were inside the call). 385 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 386 387 Handle h_exception(thread, exception); 388 methodHandle h_method (thread, method(thread)); 389 constantPoolHandle h_constants(thread, h_method->constants()); 390 bool should_repeat; 391 int handler_bci; 392 int current_bci = bci(thread); 393 394 if (thread->frames_to_pop_failed_realloc() > 0) { 395 // Allocation of scalar replaced object used in this frame 396 // failed. Unconditionally pop the frame. 397 thread->dec_frames_to_pop_failed_realloc(); 398 thread->set_vm_result(h_exception()); 399 // If the method is synchronized we already unlocked the monitor 400 // during deoptimization so the interpreter needs to skip it when 401 // the frame is popped. 402 thread->set_do_not_unlock_if_synchronized(true); 403 #ifdef CC_INTERP 404 return (address) -1; 405 #else 406 return Interpreter::remove_activation_entry(); 407 #endif 408 } 409 410 // Need to do this check first since when _do_not_unlock_if_synchronized 411 // is set, we don't want to trigger any classloading which may make calls 412 // into java, or surprisingly find a matching exception handler for bci 0 413 // since at this moment the method hasn't been "officially" entered yet. 414 if (thread->do_not_unlock_if_synchronized()) { 415 ResourceMark rm; 416 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 417 thread->set_vm_result(exception); 418 #ifdef CC_INTERP 419 return (address) -1; 420 #else 421 return Interpreter::remove_activation_entry(); 422 #endif 423 } 424 425 do { 426 should_repeat = false; 427 428 // assertions 429 #ifdef ASSERT 430 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 431 assert(h_exception->is_oop(), "just checking"); 432 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 433 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 434 if (ExitVMOnVerifyError) vm_exit(-1); 435 ShouldNotReachHere(); 436 } 437 #endif 438 439 // tracing 440 if (TraceExceptions) { 441 ResourceMark rm(thread); 442 Symbol* message = java_lang_Throwable::detail_message(h_exception()); 443 ttyLocker ttyl; // Lock after getting the detail message 444 if (message != NULL) { 445 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")", 446 h_exception->print_value_string(), message->as_C_string(), 447 (address)h_exception()); 448 } else { 449 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", 450 h_exception->print_value_string(), 451 (address)h_exception()); 452 } 453 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 454 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 455 } 456 // Don't go paging in something which won't be used. 457 // else if (extable->length() == 0) { 458 // // disabled for now - interpreter is not using shortcut yet 459 // // (shortcut is not to call runtime if we have no exception handlers) 460 // // warning("performance bug: should not call runtime if method has no exception handlers"); 461 // } 462 // for AbortVMOnException flag 463 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 464 465 // exception handler lookup 466 KlassHandle h_klass(THREAD, h_exception->klass()); 467 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 468 if (HAS_PENDING_EXCEPTION) { 469 // We threw an exception while trying to find the exception handler. 470 // Transfer the new exception to the exception handle which will 471 // be set into thread local storage, and do another lookup for an 472 // exception handler for this exception, this time starting at the 473 // BCI of the exception handler which caused the exception to be 474 // thrown (bug 4307310). 475 h_exception = Handle(THREAD, PENDING_EXCEPTION); 476 CLEAR_PENDING_EXCEPTION; 477 if (handler_bci >= 0) { 478 current_bci = handler_bci; 479 should_repeat = true; 480 } 481 } 482 } while (should_repeat == true); 483 484 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 485 // time throw or a stack unwinding throw and accordingly notify the debugger 486 if (JvmtiExport::can_post_on_exceptions()) { 487 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 488 } 489 490 #ifdef CC_INTERP 491 address continuation = (address)(intptr_t) handler_bci; 492 #else 493 address continuation = NULL; 494 #endif 495 address handler_pc = NULL; 496 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 497 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 498 // handler in this method, or (b) after a stack overflow there is not yet 499 // enough stack space available to reprotect the stack. 500 #ifndef CC_INTERP 501 continuation = Interpreter::remove_activation_entry(); 502 #endif 503 // Count this for compilation purposes 504 h_method->interpreter_throwout_increment(THREAD); 505 } else { 506 // handler in this method => change bci/bcp to handler bci/bcp and continue there 507 handler_pc = h_method->code_base() + handler_bci; 508 #ifndef CC_INTERP 509 set_bcp_and_mdp(handler_pc, thread); 510 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 511 #endif 512 } 513 // notify debugger of an exception catch 514 // (this is good for exceptions caught in native methods as well) 515 if (JvmtiExport::can_post_on_exceptions()) { 516 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 517 } 518 519 thread->set_vm_result(h_exception()); 520 return continuation; 521 IRT_END 522 523 524 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 525 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 526 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 527 IRT_END 528 529 530 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 531 THROW(vmSymbols::java_lang_AbstractMethodError()); 532 IRT_END 533 534 535 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 536 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 537 IRT_END 538 539 540 //------------------------------------------------------------------------------------------------------------------------ 541 // Fields 542 // 543 544 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 545 Thread* THREAD = thread; 546 // resolve field 547 fieldDescriptor info; 548 constantPoolHandle pool(thread, method(thread)->constants()); 549 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 550 bytecode == Bytecodes::_putstatic); 551 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 552 553 { 554 JvmtiHideSingleStepping jhss(thread); 555 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 556 bytecode, CHECK); 557 } // end JvmtiHideSingleStepping 558 559 // check if link resolution caused cpCache to be updated 560 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 561 if (cp_cache_entry->is_resolved(bytecode)) return; 562 563 // compute auxiliary field attributes 564 TosState state = as_TosState(info.field_type()); 565 566 // We need to delay resolving put instructions on final fields 567 // until we actually invoke one. This is required so we throw 568 // exceptions at the correct place. If we do not resolve completely 569 // in the current pass, leaving the put_code set to zero will 570 // cause the next put instruction to reresolve. 571 Bytecodes::Code put_code = (Bytecodes::Code)0; 572 573 // We also need to delay resolving getstatic instructions until the 574 // class is intitialized. This is required so that access to the static 575 // field will call the initialization function every time until the class 576 // is completely initialized ala. in 2.17.5 in JVM Specification. 577 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 578 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 579 !klass->is_initialized()); 580 Bytecodes::Code get_code = (Bytecodes::Code)0; 581 582 if (!uninitialized_static) { 583 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 584 if (is_put || !info.access_flags().is_final()) { 585 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 586 } 587 } 588 589 cp_cache_entry->set_field( 590 get_code, 591 put_code, 592 info.field_holder(), 593 info.index(), 594 info.offset(), 595 state, 596 info.access_flags().is_final(), 597 info.access_flags().is_volatile(), 598 pool->pool_holder() 599 ); 600 } 601 602 603 //------------------------------------------------------------------------------------------------------------------------ 604 // Synchronization 605 // 606 // The interpreter's synchronization code is factored out so that it can 607 // be shared by method invocation and synchronized blocks. 608 //%note synchronization_3 609 610 //%note monitor_1 611 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 612 #ifdef ASSERT 613 thread->last_frame().interpreter_frame_verify_monitor(elem); 614 #endif 615 if (PrintBiasedLockingStatistics) { 616 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 617 } 618 Handle h_obj(thread, oopDesc::bs()->write_barrier(elem->obj())); 619 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 620 "must be NULL or an object"); 621 if (UseBiasedLocking) { 622 // Retry fast entry if bias is revoked to avoid unnecessary inflation 623 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 624 } else { 625 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 626 } 627 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 628 "must be NULL or an object"); 629 #ifdef ASSERT 630 thread->last_frame().interpreter_frame_verify_monitor(elem); 631 #endif 632 IRT_END 633 634 635 //%note monitor_1 636 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 637 #ifdef ASSERT 638 thread->last_frame().interpreter_frame_verify_monitor(elem); 639 #endif 640 Handle h_obj(thread, oopDesc::bs()->write_barrier(elem->obj())); 641 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 642 "must be NULL or an object"); 643 if (elem == NULL || h_obj()->is_unlocked()) { 644 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 645 } 646 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 647 // Free entry. This must be done here, since a pending exception might be installed on 648 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 649 elem->set_obj(NULL); 650 #ifdef ASSERT 651 thread->last_frame().interpreter_frame_verify_monitor(elem); 652 #endif 653 IRT_END 654 655 656 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 657 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 658 IRT_END 659 660 661 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 662 // Returns an illegal exception to install into the current thread. The 663 // pending_exception flag is cleared so normal exception handling does not 664 // trigger. Any current installed exception will be overwritten. This 665 // method will be called during an exception unwind. 666 667 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 668 Handle exception(thread, thread->vm_result()); 669 assert(exception() != NULL, "vm result should be set"); 670 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 671 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 672 exception = get_preinitialized_exception( 673 SystemDictionary::IllegalMonitorStateException_klass(), 674 CATCH); 675 } 676 thread->set_vm_result(exception()); 677 IRT_END 678 679 680 //------------------------------------------------------------------------------------------------------------------------ 681 // Invokes 682 683 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 684 return method->orig_bytecode_at(method->bci_from(bcp)); 685 IRT_END 686 687 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 688 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 689 IRT_END 690 691 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 692 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 693 IRT_END 694 695 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 696 Thread* THREAD = thread; 697 // extract receiver from the outgoing argument list if necessary 698 Handle receiver(thread, NULL); 699 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 700 ResourceMark rm(thread); 701 methodHandle m (thread, method(thread)); 702 Bytecode_invoke call(m, bci(thread)); 703 Symbol* signature = call.signature(); 704 receiver = Handle(thread, 705 thread->last_frame().interpreter_callee_receiver(signature)); 706 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 707 "sanity check"); 708 assert(receiver.is_null() || 709 !Universe::heap()->is_in_reserved(receiver->klass()), 710 "sanity check"); 711 } 712 713 // resolve method 714 CallInfo info; 715 constantPoolHandle pool(thread, method(thread)->constants()); 716 717 { 718 JvmtiHideSingleStepping jhss(thread); 719 LinkResolver::resolve_invoke(info, receiver, pool, 720 get_index_u2_cpcache(thread, bytecode), bytecode, 721 CHECK); 722 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 723 int retry_count = 0; 724 while (info.resolved_method()->is_old()) { 725 // It is very unlikely that method is redefined more than 100 times 726 // in the middle of resolve. If it is looping here more than 100 times 727 // means then there could be a bug here. 728 guarantee((retry_count++ < 100), 729 "Could not resolve to latest version of redefined method"); 730 // method is redefined in the middle of resolve so re-try. 731 LinkResolver::resolve_invoke(info, receiver, pool, 732 get_index_u2_cpcache(thread, bytecode), bytecode, 733 CHECK); 734 } 735 } 736 } // end JvmtiHideSingleStepping 737 738 // check if link resolution caused cpCache to be updated 739 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 740 if (cp_cache_entry->is_resolved(bytecode)) return; 741 742 if (bytecode == Bytecodes::_invokeinterface) { 743 if (TraceItables && Verbose) { 744 ResourceMark rm(thread); 745 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 746 } 747 } 748 #ifdef ASSERT 749 if (bytecode == Bytecodes::_invokeinterface) { 750 if (info.resolved_method()->method_holder() == 751 SystemDictionary::Object_klass()) { 752 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 753 // (see also CallInfo::set_interface for details) 754 assert(info.call_kind() == CallInfo::vtable_call || 755 info.call_kind() == CallInfo::direct_call, ""); 756 methodHandle rm = info.resolved_method(); 757 assert(rm->is_final() || info.has_vtable_index(), 758 "should have been set already"); 759 } else if (!info.resolved_method()->has_itable_index()) { 760 // Resolved something like CharSequence.toString. Use vtable not itable. 761 assert(info.call_kind() != CallInfo::itable_call, ""); 762 } else { 763 // Setup itable entry 764 assert(info.call_kind() == CallInfo::itable_call, ""); 765 int index = info.resolved_method()->itable_index(); 766 assert(info.itable_index() == index, ""); 767 } 768 } else { 769 assert(info.call_kind() == CallInfo::direct_call || 770 info.call_kind() == CallInfo::vtable_call, ""); 771 } 772 #endif 773 switch (info.call_kind()) { 774 case CallInfo::direct_call: 775 cp_cache_entry->set_direct_call( 776 bytecode, 777 info.resolved_method()); 778 break; 779 case CallInfo::vtable_call: 780 cp_cache_entry->set_vtable_call( 781 bytecode, 782 info.resolved_method(), 783 info.vtable_index()); 784 break; 785 case CallInfo::itable_call: 786 cp_cache_entry->set_itable_call( 787 bytecode, 788 info.resolved_method(), 789 info.itable_index()); 790 break; 791 default: ShouldNotReachHere(); 792 } 793 } 794 795 796 // First time execution: Resolve symbols, create a permanent MethodType object. 797 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 798 Thread* THREAD = thread; 799 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 800 801 // resolve method 802 CallInfo info; 803 constantPoolHandle pool(thread, method(thread)->constants()); 804 { 805 JvmtiHideSingleStepping jhss(thread); 806 LinkResolver::resolve_invoke(info, Handle(), pool, 807 get_index_u2_cpcache(thread, bytecode), bytecode, 808 CHECK); 809 } // end JvmtiHideSingleStepping 810 811 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 812 cp_cache_entry->set_method_handle(pool, info); 813 } 814 815 // First time execution: Resolve symbols, create a permanent CallSite object. 816 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 817 Thread* THREAD = thread; 818 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 819 820 //TO DO: consider passing BCI to Java. 821 // int caller_bci = method(thread)->bci_from(bcp(thread)); 822 823 // resolve method 824 CallInfo info; 825 constantPoolHandle pool(thread, method(thread)->constants()); 826 int index = get_index_u4(thread, bytecode); 827 { 828 JvmtiHideSingleStepping jhss(thread); 829 LinkResolver::resolve_invoke(info, Handle(), pool, 830 index, bytecode, CHECK); 831 } // end JvmtiHideSingleStepping 832 833 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 834 cp_cache_entry->set_dynamic_call(pool, info); 835 } 836 837 // This function is the interface to the assembly code. It returns the resolved 838 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 839 // This function will check for redefinition! 840 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 841 switch (bytecode) { 842 case Bytecodes::_getstatic: 843 case Bytecodes::_putstatic: 844 case Bytecodes::_getfield: 845 case Bytecodes::_putfield: 846 resolve_get_put(thread, bytecode); 847 break; 848 case Bytecodes::_invokevirtual: 849 case Bytecodes::_invokespecial: 850 case Bytecodes::_invokestatic: 851 case Bytecodes::_invokeinterface: 852 resolve_invoke(thread, bytecode); 853 break; 854 case Bytecodes::_invokehandle: 855 resolve_invokehandle(thread); 856 break; 857 case Bytecodes::_invokedynamic: 858 resolve_invokedynamic(thread); 859 break; 860 default: 861 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(bytecode))); 862 break; 863 } 864 } 865 IRT_END 866 867 //------------------------------------------------------------------------------------------------------------------------ 868 // Miscellaneous 869 870 871 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 872 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 873 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 874 if (branch_bcp != NULL && nm != NULL) { 875 // This was a successful request for an OSR nmethod. Because 876 // frequency_counter_overflow_inner ends with a safepoint check, 877 // nm could have been unloaded so look it up again. It's unsafe 878 // to examine nm directly since it might have been freed and used 879 // for something else. 880 frame fr = thread->last_frame(); 881 Method* method = fr.interpreter_frame_method(); 882 int bci = method->bci_from(fr.interpreter_frame_bcp()); 883 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 884 } 885 #ifndef PRODUCT 886 if (TraceOnStackReplacement) { 887 if (nm != NULL) { 888 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 889 nm->print(); 890 } 891 } 892 #endif 893 return nm; 894 } 895 896 IRT_ENTRY(nmethod*, 897 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 898 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 899 // flag, in case this method triggers classloading which will call into Java. 900 UnlockFlagSaver fs(thread); 901 902 frame fr = thread->last_frame(); 903 assert(fr.is_interpreted_frame(), "must come from interpreter"); 904 methodHandle method(thread, fr.interpreter_frame_method()); 905 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 906 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 907 908 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 909 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 910 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 911 912 if (osr_nm != NULL) { 913 // We may need to do on-stack replacement which requires that no 914 // monitors in the activation are biased because their 915 // BasicObjectLocks will need to migrate during OSR. Force 916 // unbiasing of all monitors in the activation now (even though 917 // the OSR nmethod might be invalidated) because we don't have a 918 // safepoint opportunity later once the migration begins. 919 if (UseBiasedLocking) { 920 ResourceMark rm; 921 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 922 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 923 kptr < fr.interpreter_frame_monitor_begin(); 924 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 925 if( kptr->obj() != NULL ) { 926 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 927 } 928 } 929 BiasedLocking::revoke(objects_to_revoke); 930 } 931 } 932 return osr_nm; 933 IRT_END 934 935 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 936 assert(ProfileInterpreter, "must be profiling interpreter"); 937 int bci = method->bci_from(cur_bcp); 938 MethodData* mdo = method->method_data(); 939 if (mdo == NULL) return 0; 940 return mdo->bci_to_di(bci); 941 IRT_END 942 943 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 944 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 945 // flag, in case this method triggers classloading which will call into Java. 946 UnlockFlagSaver fs(thread); 947 948 assert(ProfileInterpreter, "must be profiling interpreter"); 949 frame fr = thread->last_frame(); 950 assert(fr.is_interpreted_frame(), "must come from interpreter"); 951 methodHandle method(thread, fr.interpreter_frame_method()); 952 Method::build_interpreter_method_data(method, THREAD); 953 if (HAS_PENDING_EXCEPTION) { 954 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 955 CLEAR_PENDING_EXCEPTION; 956 // and fall through... 957 } 958 IRT_END 959 960 961 #ifdef ASSERT 962 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 963 assert(ProfileInterpreter, "must be profiling interpreter"); 964 965 MethodData* mdo = method->method_data(); 966 assert(mdo != NULL, "must not be null"); 967 968 int bci = method->bci_from(bcp); 969 970 address mdp2 = mdo->bci_to_dp(bci); 971 if (mdp != mdp2) { 972 ResourceMark rm; 973 ResetNoHandleMark rnm; // In a LEAF entry. 974 HandleMark hm; 975 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 976 int current_di = mdo->dp_to_di(mdp); 977 int expected_di = mdo->dp_to_di(mdp2); 978 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 979 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 980 int approx_bci = -1; 981 if (current_di >= 0) { 982 approx_bci = mdo->data_at(current_di)->bci(); 983 } 984 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 985 mdo->print_on(tty); 986 method->print_codes(); 987 } 988 assert(mdp == mdp2, "wrong mdp"); 989 IRT_END 990 #endif // ASSERT 991 992 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 993 assert(ProfileInterpreter, "must be profiling interpreter"); 994 ResourceMark rm(thread); 995 HandleMark hm(thread); 996 frame fr = thread->last_frame(); 997 assert(fr.is_interpreted_frame(), "must come from interpreter"); 998 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 999 1000 // Grab a lock to ensure atomic access to setting the return bci and 1001 // the displacement. This can block and GC, invalidating all naked oops. 1002 MutexLocker ml(RetData_lock); 1003 1004 // ProfileData is essentially a wrapper around a derived oop, so we 1005 // need to take the lock before making any ProfileData structures. 1006 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 1007 RetData* rdata = data->as_RetData(); 1008 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1009 fr.interpreter_frame_set_mdp(new_mdp); 1010 IRT_END 1011 1012 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1013 MethodCounters* mcs = Method::build_method_counters(m, thread); 1014 if (HAS_PENDING_EXCEPTION) { 1015 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1016 CLEAR_PENDING_EXCEPTION; 1017 } 1018 return mcs; 1019 IRT_END 1020 1021 1022 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1023 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1024 // stack traversal automatically takes care of preserving arguments for invoke, so 1025 // this is no longer needed. 1026 1027 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1028 // if this is called during a safepoint 1029 1030 if (JvmtiExport::should_post_single_step()) { 1031 // We are called during regular safepoints and when the VM is 1032 // single stepping. If any thread is marked for single stepping, 1033 // then we may have JVMTI work to do. 1034 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1035 } 1036 IRT_END 1037 1038 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1039 ConstantPoolCacheEntry *cp_entry)) 1040 1041 // check the access_flags for the field in the klass 1042 1043 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1044 int index = cp_entry->field_index(); 1045 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1046 1047 bool is_static = (obj == NULL); 1048 HandleMark hm(thread); 1049 1050 Handle h_obj; 1051 if (!is_static) { 1052 // non-static field accessors have an object, but we need a handle 1053 h_obj = Handle(thread, obj); 1054 } 1055 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1056 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1057 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1058 IRT_END 1059 1060 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1061 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1062 1063 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1064 1065 // check the access_flags for the field in the klass 1066 InstanceKlass* ik = InstanceKlass::cast(k); 1067 int index = cp_entry->field_index(); 1068 // bail out if field modifications are not watched 1069 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1070 1071 char sig_type = '\0'; 1072 1073 switch(cp_entry->flag_state()) { 1074 case btos: sig_type = 'Z'; break; 1075 case ctos: sig_type = 'C'; break; 1076 case stos: sig_type = 'S'; break; 1077 case itos: sig_type = 'I'; break; 1078 case ftos: sig_type = 'F'; break; 1079 case atos: sig_type = 'L'; break; 1080 case ltos: sig_type = 'J'; break; 1081 case dtos: sig_type = 'D'; break; 1082 default: ShouldNotReachHere(); return; 1083 } 1084 bool is_static = (obj == NULL); 1085 1086 HandleMark hm(thread); 1087 instanceKlassHandle h_klass(thread, k); 1088 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1089 jvalue fvalue; 1090 #ifdef _LP64 1091 fvalue = *value; 1092 #else 1093 // Long/double values are stored unaligned and also noncontiguously with 1094 // tagged stacks. We can't just do a simple assignment even in the non- 1095 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1096 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1097 // We assume that the two halves of longs/doubles are stored in interpreter 1098 // stack slots in platform-endian order. 1099 jlong_accessor u; 1100 jint* newval = (jint*)value; 1101 u.words[0] = newval[0]; 1102 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1103 fvalue.j = u.long_value; 1104 #endif // _LP64 1105 1106 Handle h_obj; 1107 if (!is_static) { 1108 // non-static field accessors have an object, but we need a handle 1109 h_obj = Handle(thread, obj); 1110 } 1111 1112 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1113 fid, sig_type, &fvalue); 1114 IRT_END 1115 1116 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1117 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1118 IRT_END 1119 1120 1121 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1122 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1123 IRT_END 1124 1125 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1126 { 1127 return (Interpreter::contains(pc) ? 1 : 0); 1128 } 1129 IRT_END 1130 1131 1132 // Implementation of SignatureHandlerLibrary 1133 1134 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1135 // Dummy definition (else normalization method is defined in CPU 1136 // dependant code) 1137 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1138 return fingerprint; 1139 } 1140 #endif 1141 1142 address SignatureHandlerLibrary::set_handler_blob() { 1143 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1144 if (handler_blob == NULL) { 1145 return NULL; 1146 } 1147 address handler = handler_blob->code_begin(); 1148 _handler_blob = handler_blob; 1149 _handler = handler; 1150 return handler; 1151 } 1152 1153 void SignatureHandlerLibrary::initialize() { 1154 if (_fingerprints != NULL) { 1155 return; 1156 } 1157 if (set_handler_blob() == NULL) { 1158 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1159 } 1160 1161 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1162 SignatureHandlerLibrary::buffer_size); 1163 _buffer = bb->code_begin(); 1164 1165 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1166 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1167 } 1168 1169 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1170 address handler = _handler; 1171 int insts_size = buffer->pure_insts_size(); 1172 if (handler + insts_size > _handler_blob->code_end()) { 1173 // get a new handler blob 1174 handler = set_handler_blob(); 1175 } 1176 if (handler != NULL) { 1177 memcpy(handler, buffer->insts_begin(), insts_size); 1178 pd_set_handler(handler); 1179 ICache::invalidate_range(handler, insts_size); 1180 _handler = handler + insts_size; 1181 } 1182 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler); 1183 return handler; 1184 } 1185 1186 void SignatureHandlerLibrary::add(methodHandle method) { 1187 if (method->signature_handler() == NULL) { 1188 // use slow signature handler if we can't do better 1189 int handler_index = -1; 1190 // check if we can use customized (fast) signature handler 1191 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1192 // use customized signature handler 1193 MutexLocker mu(SignatureHandlerLibrary_lock); 1194 // make sure data structure is initialized 1195 initialize(); 1196 // lookup method signature's fingerprint 1197 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1198 // allow CPU dependant code to optimize the fingerprints for the fast handler 1199 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1200 handler_index = _fingerprints->find(fingerprint); 1201 // create handler if necessary 1202 if (handler_index < 0) { 1203 ResourceMark rm; 1204 ptrdiff_t align_offset = (address) 1205 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1206 CodeBuffer buffer((address)(_buffer + align_offset), 1207 SignatureHandlerLibrary::buffer_size - align_offset); 1208 if (!CodeCacheExtensions::support_dynamic_code()) { 1209 // we need a name for the signature (for lookups or saving) 1210 const int SYMBOL_SIZE = 50; 1211 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE); 1212 // support for named signatures 1213 jio_snprintf(symbolName, SYMBOL_SIZE, 1214 "native_" UINT64_FORMAT, fingerprint); 1215 buffer.set_name(symbolName); 1216 } 1217 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1218 // copy into code heap 1219 address handler = set_handler(&buffer); 1220 if (handler == NULL) { 1221 // use slow signature handler (without memorizing it in the fingerprints) 1222 } else { 1223 // debugging suppport 1224 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1225 tty->cr(); 1226 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1227 _handlers->length(), 1228 (method->is_static() ? "static" : "receiver"), 1229 method->name_and_sig_as_C_string(), 1230 fingerprint, 1231 buffer.insts_size()); 1232 if (buffer.insts_size() > 0) { 1233 // buffer may be empty for pregenerated handlers 1234 Disassembler::decode(handler, handler + buffer.insts_size()); 1235 } 1236 #ifndef PRODUCT 1237 address rh_begin = Interpreter::result_handler(method()->result_type()); 1238 if (CodeCache::contains(rh_begin)) { 1239 // else it might be special platform dependent values 1240 tty->print_cr(" --- associated result handler ---"); 1241 address rh_end = rh_begin; 1242 while (*(int*)rh_end != 0) { 1243 rh_end += sizeof(int); 1244 } 1245 Disassembler::decode(rh_begin, rh_end); 1246 } else { 1247 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1248 } 1249 #endif 1250 } 1251 // add handler to library 1252 _fingerprints->append(fingerprint); 1253 _handlers->append(handler); 1254 // set handler index 1255 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1256 handler_index = _fingerprints->length() - 1; 1257 } 1258 } 1259 // Set handler under SignatureHandlerLibrary_lock 1260 if (handler_index < 0) { 1261 // use generic signature handler 1262 method->set_signature_handler(Interpreter::slow_signature_handler()); 1263 } else { 1264 // set handler 1265 method->set_signature_handler(_handlers->at(handler_index)); 1266 } 1267 } else { 1268 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1269 // use generic signature handler 1270 method->set_signature_handler(Interpreter::slow_signature_handler()); 1271 } 1272 } 1273 #ifdef ASSERT 1274 int handler_index = -1; 1275 int fingerprint_index = -2; 1276 { 1277 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1278 // in any way if accessed from multiple threads. To avoid races with another 1279 // thread which may change the arrays in the above, mutex protected block, we 1280 // have to protect this read access here with the same mutex as well! 1281 MutexLocker mu(SignatureHandlerLibrary_lock); 1282 if (_handlers != NULL) { 1283 handler_index = _handlers->find(method->signature_handler()); 1284 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1285 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1286 fingerprint_index = _fingerprints->find(fingerprint); 1287 } 1288 } 1289 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1290 handler_index == fingerprint_index, "sanity check"); 1291 #endif // ASSERT 1292 } 1293 1294 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1295 int handler_index = -1; 1296 // use customized signature handler 1297 MutexLocker mu(SignatureHandlerLibrary_lock); 1298 // make sure data structure is initialized 1299 initialize(); 1300 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1301 handler_index = _fingerprints->find(fingerprint); 1302 // create handler if necessary 1303 if (handler_index < 0) { 1304 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1305 tty->cr(); 1306 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1307 _handlers->length(), 1308 handler, 1309 fingerprint); 1310 } 1311 _fingerprints->append(fingerprint); 1312 _handlers->append(handler); 1313 } else { 1314 if (PrintSignatureHandlers) { 1315 tty->cr(); 1316 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1317 _handlers->length(), 1318 fingerprint, 1319 _handlers->at(handler_index), 1320 handler); 1321 } 1322 } 1323 } 1324 1325 1326 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1327 address SignatureHandlerLibrary::_handler = NULL; 1328 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1329 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1330 address SignatureHandlerLibrary::_buffer = NULL; 1331 1332 1333 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1334 methodHandle m(thread, method); 1335 assert(m->is_native(), "sanity check"); 1336 // lookup native function entry point if it doesn't exist 1337 bool in_base_library; 1338 if (!m->has_native_function()) { 1339 NativeLookup::lookup(m, in_base_library, CHECK); 1340 } 1341 // make sure signature handler is installed 1342 SignatureHandlerLibrary::add(m); 1343 // The interpreter entry point checks the signature handler first, 1344 // before trying to fetch the native entry point and klass mirror. 1345 // We must set the signature handler last, so that multiple processors 1346 // preparing the same method will be sure to see non-null entry & mirror. 1347 IRT_END 1348 1349 #if defined(IA32) || defined(AMD64) || defined(ARM) 1350 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1351 if (src_address == dest_address) { 1352 return; 1353 } 1354 ResetNoHandleMark rnm; // In a LEAF entry. 1355 HandleMark hm; 1356 ResourceMark rm; 1357 frame fr = thread->last_frame(); 1358 assert(fr.is_interpreted_frame(), ""); 1359 jint bci = fr.interpreter_frame_bci(); 1360 methodHandle mh(thread, fr.interpreter_frame_method()); 1361 Bytecode_invoke invoke(mh, bci); 1362 ArgumentSizeComputer asc(invoke.signature()); 1363 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1364 Copy::conjoint_jbytes(src_address, dest_address, 1365 size_of_arguments * Interpreter::stackElementSize); 1366 IRT_END 1367 #endif 1368 1369 #if INCLUDE_JVMTI 1370 // This is a support of the JVMTI PopFrame interface. 1371 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1372 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1373 // The member_name argument is a saved reference (in local#0) to the member_name. 1374 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1375 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1376 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1377 Method* method, address bcp)) 1378 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1379 if (code != Bytecodes::_invokestatic) { 1380 return; 1381 } 1382 ConstantPool* cpool = method->constants(); 1383 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1384 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1385 Symbol* mname = cpool->name_ref_at(cp_index); 1386 1387 if (MethodHandles::has_member_arg(cname, mname)) { 1388 oop member_name_oop = (oop) member_name; 1389 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1390 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1391 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1392 } 1393 thread->set_vm_result(member_name_oop); 1394 } else { 1395 thread->set_vm_result(NULL); 1396 } 1397 IRT_END 1398 #endif // INCLUDE_JVMTI