1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compileBroker.hpp" 29 #include "compiler/disassembler.hpp" 30 #include "gc_interface/collectedHeap.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "interpreter/interpreterRuntime.hpp" 33 #include "interpreter/linkResolver.hpp" 34 #include "interpreter/templateTable.hpp" 35 #include "memory/oopFactory.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/constantPool.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/methodData.hpp" 40 #include "oops/objArrayKlass.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "oops/symbol.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "prims/nativeLookup.hpp" 45 #include "runtime/biasedLocking.hpp" 46 #include "runtime/compilationPolicy.hpp" 47 #include "runtime/deoptimization.hpp" 48 #include "runtime/fieldDescriptor.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/jfieldIDWorkaround.hpp" 53 #include "runtime/osThread.hpp" 54 #include "runtime/sharedRuntime.hpp" 55 #include "runtime/stubRoutines.hpp" 56 #include "runtime/synchronizer.hpp" 57 #include "runtime/threadCritical.hpp" 58 #include "utilities/events.hpp" 59 #ifdef TARGET_ARCH_x86 60 # include "vm_version_x86.hpp" 61 #endif 62 #ifdef TARGET_ARCH_aarch64 63 # include "vm_version_aarch64.hpp" 64 #endif 65 #ifdef TARGET_ARCH_sparc 66 # include "vm_version_sparc.hpp" 67 #endif 68 #ifdef TARGET_ARCH_zero 69 # include "vm_version_zero.hpp" 70 #endif 71 #ifdef TARGET_ARCH_arm 72 # include "vm_version_arm.hpp" 73 #endif 74 #ifdef TARGET_ARCH_ppc 75 # include "vm_version_ppc.hpp" 76 #endif 77 #ifdef COMPILER2 78 #include "opto/runtime.hpp" 79 #endif 80 81 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 82 83 class UnlockFlagSaver { 84 private: 85 JavaThread* _thread; 86 bool _do_not_unlock; 87 public: 88 UnlockFlagSaver(JavaThread* t) { 89 _thread = t; 90 _do_not_unlock = t->do_not_unlock_if_synchronized(); 91 t->set_do_not_unlock_if_synchronized(false); 92 } 93 ~UnlockFlagSaver() { 94 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 95 } 96 }; 97 98 //------------------------------------------------------------------------------------------------------------------------ 99 // State accessors 100 101 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 102 last_frame(thread).interpreter_frame_set_bcp(bcp); 103 if (ProfileInterpreter) { 104 // ProfileTraps uses MDOs independently of ProfileInterpreter. 105 // That is why we must check both ProfileInterpreter and mdo != NULL. 106 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 107 if (mdo != NULL) { 108 NEEDS_CLEANUP; 109 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 110 } 111 } 112 } 113 114 //------------------------------------------------------------------------------------------------------------------------ 115 // Constants 116 117 118 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 119 // access constant pool 120 ConstantPool* pool = method(thread)->constants(); 121 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 122 constantTag tag = pool->tag_at(index); 123 124 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 125 Klass* klass = pool->klass_at(index, CHECK); 126 oop java_class = klass->java_mirror(); 127 thread->set_vm_result(java_class); 128 IRT_END 129 130 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 131 assert(bytecode == Bytecodes::_fast_aldc || 132 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 133 ResourceMark rm(thread); 134 methodHandle m (thread, method(thread)); 135 Bytecode_loadconstant ldc(m, bci(thread)); 136 oop result = ldc.resolve_constant(CHECK); 137 #ifdef ASSERT 138 { 139 // The bytecode wrappers aren't GC-safe so construct a new one 140 Bytecode_loadconstant ldc2(m, bci(thread)); 141 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 142 assert(result == coop, "expected result for assembly code"); 143 } 144 #endif 145 thread->set_vm_result(result); 146 } 147 IRT_END 148 149 150 //------------------------------------------------------------------------------------------------------------------------ 151 // Allocation 152 153 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 154 Klass* k_oop = pool->klass_at(index, CHECK); 155 instanceKlassHandle klass (THREAD, k_oop); 156 157 // Make sure we are not instantiating an abstract klass 158 klass->check_valid_for_instantiation(true, CHECK); 159 160 // Make sure klass is initialized 161 klass->initialize(CHECK); 162 163 // At this point the class may not be fully initialized 164 // because of recursive initialization. If it is fully 165 // initialized & has_finalized is not set, we rewrite 166 // it into its fast version (Note: no locking is needed 167 // here since this is an atomic byte write and can be 168 // done more than once). 169 // 170 // Note: In case of classes with has_finalized we don't 171 // rewrite since that saves us an extra check in 172 // the fast version which then would call the 173 // slow version anyway (and do a call back into 174 // Java). 175 // If we have a breakpoint, then we don't rewrite 176 // because the _breakpoint bytecode would be lost. 177 oop obj = klass->allocate_instance(CHECK); 178 thread->set_vm_result(obj); 179 IRT_END 180 181 182 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 183 oop obj = oopFactory::new_typeArray(type, size, CHECK); 184 thread->set_vm_result(obj); 185 IRT_END 186 187 188 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 189 // Note: no oopHandle for pool & klass needed since they are not used 190 // anymore after new_objArray() and no GC can happen before. 191 // (This may have to change if this code changes!) 192 Klass* klass = pool->klass_at(index, CHECK); 193 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 194 thread->set_vm_result(obj); 195 IRT_END 196 197 198 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 199 // We may want to pass in more arguments - could make this slightly faster 200 ConstantPool* constants = method(thread)->constants(); 201 int i = get_index_u2(thread, Bytecodes::_multianewarray); 202 Klass* klass = constants->klass_at(i, CHECK); 203 int nof_dims = number_of_dimensions(thread); 204 assert(klass->is_klass(), "not a class"); 205 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 206 207 // We must create an array of jints to pass to multi_allocate. 208 ResourceMark rm(thread); 209 const int small_dims = 10; 210 jint dim_array[small_dims]; 211 jint *dims = &dim_array[0]; 212 if (nof_dims > small_dims) { 213 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 214 } 215 for (int index = 0; index < nof_dims; index++) { 216 // offset from first_size_address is addressed as local[index] 217 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 218 dims[index] = first_size_address[n]; 219 } 220 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 221 thread->set_vm_result(obj); 222 IRT_END 223 224 225 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 226 assert(obj->is_oop(), "must be a valid oop"); 227 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 228 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 229 IRT_END 230 231 232 // Quicken instance-of and check-cast bytecodes 233 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 234 // Force resolving; quicken the bytecode 235 int which = get_index_u2(thread, Bytecodes::_checkcast); 236 ConstantPool* cpool = method(thread)->constants(); 237 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 238 // program we might have seen an unquick'd bytecode in the interpreter but have another 239 // thread quicken the bytecode before we get here. 240 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 241 Klass* klass = cpool->klass_at(which, CHECK); 242 thread->set_vm_result_2(klass); 243 IRT_END 244 245 246 //------------------------------------------------------------------------------------------------------------------------ 247 // Exceptions 248 249 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 250 methodHandle trap_method, int trap_bci, TRAPS) { 251 if (trap_method.not_null()) { 252 MethodData* trap_mdo = trap_method->method_data(); 253 if (trap_mdo == NULL) { 254 Method::build_interpreter_method_data(trap_method, THREAD); 255 if (HAS_PENDING_EXCEPTION) { 256 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 257 "we expect only an OOM error here"); 258 CLEAR_PENDING_EXCEPTION; 259 } 260 trap_mdo = trap_method->method_data(); 261 // and fall through... 262 } 263 if (trap_mdo != NULL) { 264 // Update per-method count of trap events. The interpreter 265 // is updating the MDO to simulate the effect of compiler traps. 266 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 267 } 268 } 269 } 270 271 // Assume the compiler is (or will be) interested in this event. 272 // If necessary, create an MDO to hold the information, and record it. 273 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 274 assert(ProfileTraps, "call me only if profiling"); 275 methodHandle trap_method(thread, method(thread)); 276 int trap_bci = trap_method->bci_from(bcp(thread)); 277 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 278 } 279 280 #ifdef CC_INTERP 281 // As legacy note_trap, but we have more arguments. 282 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 283 methodHandle trap_method(method); 284 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 285 IRT_END 286 287 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 288 // for each exception. 289 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 290 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 291 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 292 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 293 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 294 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 295 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 296 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 297 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 298 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 299 #endif // CC_INTERP 300 301 302 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 303 // get klass 304 InstanceKlass* klass = InstanceKlass::cast(k); 305 assert(klass->is_initialized(), 306 "this klass should have been initialized during VM initialization"); 307 // create instance - do not call constructor since we may have no 308 // (java) stack space left (should assert constructor is empty) 309 Handle exception; 310 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 311 exception = Handle(THREAD, exception_oop); 312 if (StackTraceInThrowable) { 313 java_lang_Throwable::fill_in_stack_trace(exception); 314 } 315 return exception; 316 } 317 318 // Special handling for stack overflow: since we don't have any (java) stack 319 // space left we use the pre-allocated & pre-initialized StackOverflowError 320 // klass to create an stack overflow error instance. We do not call its 321 // constructor for the same reason (it is empty, anyway). 322 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 323 Handle exception = get_preinitialized_exception( 324 SystemDictionary::StackOverflowError_klass(), 325 CHECK); 326 // Increment counter for hs_err file reporting 327 Atomic::inc(&Exceptions::_stack_overflow_errors); 328 THROW_HANDLE(exception); 329 IRT_END 330 331 332 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 333 // lookup exception klass 334 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 335 if (ProfileTraps) { 336 if (s == vmSymbols::java_lang_ArithmeticException()) { 337 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 338 } else if (s == vmSymbols::java_lang_NullPointerException()) { 339 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 340 } 341 } 342 // create exception 343 Handle exception = Exceptions::new_exception(thread, s, message); 344 thread->set_vm_result(exception()); 345 IRT_END 346 347 348 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 349 ResourceMark rm(thread); 350 const char* klass_name = obj->klass()->external_name(); 351 // lookup exception klass 352 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 353 if (ProfileTraps) { 354 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 355 } 356 // create exception, with klass name as detail message 357 Handle exception = Exceptions::new_exception(thread, s, klass_name); 358 thread->set_vm_result(exception()); 359 IRT_END 360 361 362 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 363 char message[jintAsStringSize]; 364 // lookup exception klass 365 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 366 if (ProfileTraps) { 367 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 368 } 369 // create exception 370 sprintf(message, "%d", index); 371 THROW_MSG(s, message); 372 IRT_END 373 374 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 375 JavaThread* thread, oopDesc* obj)) 376 377 ResourceMark rm(thread); 378 char* message = SharedRuntime::generate_class_cast_message( 379 thread, obj->klass()->external_name()); 380 381 if (ProfileTraps) { 382 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 383 } 384 385 // create exception 386 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 387 IRT_END 388 389 // exception_handler_for_exception(...) returns the continuation address, 390 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 391 // The exception oop is returned to make sure it is preserved over GC (it 392 // is only on the stack if the exception was thrown explicitly via athrow). 393 // During this operation, the expression stack contains the values for the 394 // bci where the exception happened. If the exception was propagated back 395 // from a call, the expression stack contains the values for the bci at the 396 // invoke w/o arguments (i.e., as if one were inside the call). 397 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 398 399 Handle h_exception(thread, exception); 400 methodHandle h_method (thread, method(thread)); 401 constantPoolHandle h_constants(thread, h_method->constants()); 402 bool should_repeat; 403 int handler_bci; 404 int current_bci = bci(thread); 405 406 if (thread->frames_to_pop_failed_realloc() > 0) { 407 // Allocation of scalar replaced object used in this frame 408 // failed. Unconditionally pop the frame. 409 thread->dec_frames_to_pop_failed_realloc(); 410 thread->set_vm_result(h_exception()); 411 // If the method is synchronized we already unlocked the monitor 412 // during deoptimization so the interpreter needs to skip it when 413 // the frame is popped. 414 thread->set_do_not_unlock_if_synchronized(true); 415 #ifdef CC_INTERP 416 return (address) -1; 417 #else 418 return Interpreter::remove_activation_entry(); 419 #endif 420 } 421 422 // Need to do this check first since when _do_not_unlock_if_synchronized 423 // is set, we don't want to trigger any classloading which may make calls 424 // into java, or surprisingly find a matching exception handler for bci 0 425 // since at this moment the method hasn't been "officially" entered yet. 426 if (thread->do_not_unlock_if_synchronized()) { 427 ResourceMark rm; 428 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 429 thread->set_vm_result(exception); 430 #ifdef CC_INTERP 431 return (address) -1; 432 #else 433 return Interpreter::remove_activation_entry(); 434 #endif 435 } 436 437 do { 438 should_repeat = false; 439 440 // assertions 441 #ifdef ASSERT 442 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 443 assert(h_exception->is_oop(), "just checking"); 444 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 445 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 446 if (ExitVMOnVerifyError) vm_exit(-1); 447 ShouldNotReachHere(); 448 } 449 #endif 450 451 // tracing 452 if (TraceExceptions) { 453 ttyLocker ttyl; 454 ResourceMark rm(thread); 455 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 456 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 457 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 458 } 459 // Don't go paging in something which won't be used. 460 // else if (extable->length() == 0) { 461 // // disabled for now - interpreter is not using shortcut yet 462 // // (shortcut is not to call runtime if we have no exception handlers) 463 // // warning("performance bug: should not call runtime if method has no exception handlers"); 464 // } 465 // for AbortVMOnException flag 466 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 467 468 // exception handler lookup 469 KlassHandle h_klass(THREAD, h_exception->klass()); 470 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 471 if (HAS_PENDING_EXCEPTION) { 472 // We threw an exception while trying to find the exception handler. 473 // Transfer the new exception to the exception handle which will 474 // be set into thread local storage, and do another lookup for an 475 // exception handler for this exception, this time starting at the 476 // BCI of the exception handler which caused the exception to be 477 // thrown (bug 4307310). 478 h_exception = Handle(THREAD, PENDING_EXCEPTION); 479 CLEAR_PENDING_EXCEPTION; 480 if (handler_bci >= 0) { 481 current_bci = handler_bci; 482 should_repeat = true; 483 } 484 } 485 } while (should_repeat == true); 486 487 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 488 // time throw or a stack unwinding throw and accordingly notify the debugger 489 if (JvmtiExport::can_post_on_exceptions()) { 490 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 491 } 492 493 #ifdef CC_INTERP 494 address continuation = (address)(intptr_t) handler_bci; 495 #else 496 address continuation = NULL; 497 #endif 498 address handler_pc = NULL; 499 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 500 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 501 // handler in this method, or (b) after a stack overflow there is not yet 502 // enough stack space available to reprotect the stack. 503 #ifndef CC_INTERP 504 continuation = Interpreter::remove_activation_entry(); 505 #endif 506 // Count this for compilation purposes 507 h_method->interpreter_throwout_increment(THREAD); 508 } else { 509 // handler in this method => change bci/bcp to handler bci/bcp and continue there 510 handler_pc = h_method->code_base() + handler_bci; 511 #ifndef CC_INTERP 512 set_bcp_and_mdp(handler_pc, thread); 513 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 514 #endif 515 } 516 // notify debugger of an exception catch 517 // (this is good for exceptions caught in native methods as well) 518 if (JvmtiExport::can_post_on_exceptions()) { 519 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 520 } 521 522 thread->set_vm_result(h_exception()); 523 return continuation; 524 IRT_END 525 526 527 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 528 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 529 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 530 IRT_END 531 532 533 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 534 THROW(vmSymbols::java_lang_AbstractMethodError()); 535 IRT_END 536 537 538 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 539 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 540 IRT_END 541 542 543 //------------------------------------------------------------------------------------------------------------------------ 544 // Fields 545 // 546 547 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 548 // resolve field 549 fieldDescriptor info; 550 constantPoolHandle pool(thread, method(thread)->constants()); 551 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); 552 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 553 554 { 555 JvmtiHideSingleStepping jhss(thread); 556 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 557 bytecode, CHECK); 558 } // end JvmtiHideSingleStepping 559 560 // check if link resolution caused cpCache to be updated 561 if (already_resolved(thread)) 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 cache_entry(thread)->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 IRT_END 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, 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, 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 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { 696 // extract receiver from the outgoing argument list if necessary 697 Handle receiver(thread, NULL); 698 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 699 bytecode == Bytecodes::_invokespecial) { 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, CHECK); 721 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 722 int retry_count = 0; 723 while (info.resolved_method()->is_old()) { 724 // It is very unlikely that method is redefined more than 100 times 725 // in the middle of resolve. If it is looping here more than 100 times 726 // means then there could be a bug here. 727 guarantee((retry_count++ < 100), 728 "Could not resolve to latest version of redefined method"); 729 // method is redefined in the middle of resolve so re-try. 730 LinkResolver::resolve_invoke(info, receiver, pool, 731 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 732 } 733 } 734 } // end JvmtiHideSingleStepping 735 736 // check if link resolution caused cpCache to be updated 737 if (already_resolved(thread)) return; 738 739 if (bytecode == Bytecodes::_invokeinterface) { 740 if (TraceItables && Verbose) { 741 ResourceMark rm(thread); 742 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 743 } 744 } 745 #ifdef ASSERT 746 if (bytecode == Bytecodes::_invokeinterface) { 747 if (info.resolved_method()->method_holder() == 748 SystemDictionary::Object_klass()) { 749 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 750 // (see also CallInfo::set_interface for details) 751 assert(info.call_kind() == CallInfo::vtable_call || 752 info.call_kind() == CallInfo::direct_call, ""); 753 methodHandle rm = info.resolved_method(); 754 assert(rm->is_final() || info.has_vtable_index(), 755 "should have been set already"); 756 } else if (!info.resolved_method()->has_itable_index()) { 757 // Resolved something like CharSequence.toString. Use vtable not itable. 758 assert(info.call_kind() != CallInfo::itable_call, ""); 759 } else { 760 // Setup itable entry 761 assert(info.call_kind() == CallInfo::itable_call, ""); 762 int index = info.resolved_method()->itable_index(); 763 assert(info.itable_index() == index, ""); 764 } 765 } else if (bytecode == Bytecodes::_invokespecial) { 766 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 767 } else { 768 assert(info.call_kind() == CallInfo::direct_call || 769 info.call_kind() == CallInfo::vtable_call, ""); 770 } 771 #endif 772 // Get sender or sender's host_klass, and only set cpCache entry to resolved if 773 // it is not an interface. The receiver for invokespecial calls within interface 774 // methods must be checked for every call. 775 InstanceKlass* sender = pool->pool_holder(); 776 sender = sender->has_host_klass() ? InstanceKlass::cast(sender->host_klass()) : sender; 777 778 switch (info.call_kind()) { 779 case CallInfo::direct_call: 780 cache_entry(thread)->set_direct_call( 781 bytecode, 782 info.resolved_method(), 783 sender->is_interface()); 784 break; 785 case CallInfo::vtable_call: 786 cache_entry(thread)->set_vtable_call( 787 bytecode, 788 info.resolved_method(), 789 info.vtable_index()); 790 break; 791 case CallInfo::itable_call: 792 cache_entry(thread)->set_itable_call( 793 bytecode, 794 info.resolved_klass(), 795 info.resolved_method(), 796 info.itable_index()); 797 break; 798 default: ShouldNotReachHere(); 799 } 800 } 801 IRT_END 802 803 804 // First time execution: Resolve symbols, create a permanent MethodType object. 805 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { 806 assert(EnableInvokeDynamic, ""); 807 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 808 809 // resolve method 810 CallInfo info; 811 constantPoolHandle pool(thread, method(thread)->constants()); 812 813 { 814 JvmtiHideSingleStepping jhss(thread); 815 LinkResolver::resolve_invoke(info, Handle(), pool, 816 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 817 } // end JvmtiHideSingleStepping 818 819 cache_entry(thread)->set_method_handle(pool, info); 820 } 821 IRT_END 822 823 824 // First time execution: Resolve symbols, create a permanent CallSite object. 825 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 826 assert(EnableInvokeDynamic, ""); 827 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 828 829 //TO DO: consider passing BCI to Java. 830 // int caller_bci = method(thread)->bci_from(bcp(thread)); 831 832 // resolve method 833 CallInfo info; 834 constantPoolHandle pool(thread, method(thread)->constants()); 835 int index = get_index_u4(thread, bytecode); 836 { 837 JvmtiHideSingleStepping jhss(thread); 838 LinkResolver::resolve_invoke(info, Handle(), pool, 839 index, bytecode, CHECK); 840 } // end JvmtiHideSingleStepping 841 842 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 843 cp_cache_entry->set_dynamic_call(pool, info); 844 } 845 IRT_END 846 847 848 //------------------------------------------------------------------------------------------------------------------------ 849 // Miscellaneous 850 851 852 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 853 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 854 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 855 if (branch_bcp != NULL && nm != NULL) { 856 // This was a successful request for an OSR nmethod. Because 857 // frequency_counter_overflow_inner ends with a safepoint check, 858 // nm could have been unloaded so look it up again. It's unsafe 859 // to examine nm directly since it might have been freed and used 860 // for something else. 861 frame fr = thread->last_frame(); 862 Method* method = fr.interpreter_frame_method(); 863 int bci = method->bci_from(fr.interpreter_frame_bcp()); 864 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 865 } 866 #ifndef PRODUCT 867 if (TraceOnStackReplacement) { 868 if (nm != NULL) { 869 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 870 nm->print(); 871 } 872 } 873 #endif 874 return nm; 875 } 876 877 IRT_ENTRY(nmethod*, 878 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 879 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 880 // flag, in case this method triggers classloading which will call into Java. 881 UnlockFlagSaver fs(thread); 882 883 frame fr = thread->last_frame(); 884 assert(fr.is_interpreted_frame(), "must come from interpreter"); 885 methodHandle method(thread, fr.interpreter_frame_method()); 886 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 887 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 888 889 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 890 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 891 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 892 893 if (osr_nm != NULL) { 894 // We may need to do on-stack replacement which requires that no 895 // monitors in the activation are biased because their 896 // BasicObjectLocks will need to migrate during OSR. Force 897 // unbiasing of all monitors in the activation now (even though 898 // the OSR nmethod might be invalidated) because we don't have a 899 // safepoint opportunity later once the migration begins. 900 if (UseBiasedLocking) { 901 ResourceMark rm; 902 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 903 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 904 kptr < fr.interpreter_frame_monitor_begin(); 905 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 906 if( kptr->obj() != NULL ) { 907 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 908 } 909 } 910 BiasedLocking::revoke(objects_to_revoke); 911 } 912 } 913 return osr_nm; 914 IRT_END 915 916 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 917 assert(ProfileInterpreter, "must be profiling interpreter"); 918 int bci = method->bci_from(cur_bcp); 919 MethodData* mdo = method->method_data(); 920 if (mdo == NULL) return 0; 921 return mdo->bci_to_di(bci); 922 IRT_END 923 924 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 925 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 926 // flag, in case this method triggers classloading which will call into Java. 927 UnlockFlagSaver fs(thread); 928 929 assert(ProfileInterpreter, "must be profiling interpreter"); 930 frame fr = thread->last_frame(); 931 assert(fr.is_interpreted_frame(), "must come from interpreter"); 932 methodHandle method(thread, fr.interpreter_frame_method()); 933 Method::build_interpreter_method_data(method, THREAD); 934 if (HAS_PENDING_EXCEPTION) { 935 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 936 CLEAR_PENDING_EXCEPTION; 937 // and fall through... 938 } 939 IRT_END 940 941 942 #ifdef ASSERT 943 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 944 assert(ProfileInterpreter, "must be profiling interpreter"); 945 946 MethodData* mdo = method->method_data(); 947 assert(mdo != NULL, "must not be null"); 948 949 int bci = method->bci_from(bcp); 950 951 address mdp2 = mdo->bci_to_dp(bci); 952 if (mdp != mdp2) { 953 ResourceMark rm; 954 ResetNoHandleMark rnm; // In a LEAF entry. 955 HandleMark hm; 956 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 957 int current_di = mdo->dp_to_di(mdp); 958 int expected_di = mdo->dp_to_di(mdp2); 959 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 960 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 961 int approx_bci = -1; 962 if (current_di >= 0) { 963 approx_bci = mdo->data_at(current_di)->bci(); 964 } 965 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 966 mdo->print_on(tty); 967 method->print_codes(); 968 } 969 assert(mdp == mdp2, "wrong mdp"); 970 IRT_END 971 #endif // ASSERT 972 973 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 974 assert(ProfileInterpreter, "must be profiling interpreter"); 975 ResourceMark rm(thread); 976 HandleMark hm(thread); 977 frame fr = thread->last_frame(); 978 assert(fr.is_interpreted_frame(), "must come from interpreter"); 979 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 980 981 // Grab a lock to ensure atomic access to setting the return bci and 982 // the displacement. This can block and GC, invalidating all naked oops. 983 MutexLocker ml(RetData_lock); 984 985 // ProfileData is essentially a wrapper around a derived oop, so we 986 // need to take the lock before making any ProfileData structures. 987 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 988 guarantee(data != NULL, "profile data must be valid"); 989 RetData* rdata = data->as_RetData(); 990 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 991 fr.interpreter_frame_set_mdp(new_mdp); 992 IRT_END 993 994 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 995 MethodCounters* mcs = Method::build_method_counters(m, thread); 996 if (HAS_PENDING_EXCEPTION) { 997 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 998 CLEAR_PENDING_EXCEPTION; 999 } 1000 return mcs; 1001 IRT_END 1002 1003 1004 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1005 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1006 // stack traversal automatically takes care of preserving arguments for invoke, so 1007 // this is no longer needed. 1008 1009 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1010 // if this is called during a safepoint 1011 1012 if (JvmtiExport::should_post_single_step()) { 1013 // We are called during regular safepoints and when the VM is 1014 // single stepping. If any thread is marked for single stepping, 1015 // then we may have JVMTI work to do. 1016 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1017 } 1018 IRT_END 1019 1020 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1021 ConstantPoolCacheEntry *cp_entry)) 1022 1023 // check the access_flags for the field in the klass 1024 1025 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1026 int index = cp_entry->field_index(); 1027 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1028 1029 switch(cp_entry->flag_state()) { 1030 case btos: // fall through 1031 case ztos: // fall through 1032 case ctos: // fall through 1033 case stos: // fall through 1034 case itos: // fall through 1035 case ftos: // fall through 1036 case ltos: // fall through 1037 case dtos: // fall through 1038 case atos: break; 1039 default: ShouldNotReachHere(); return; 1040 } 1041 bool is_static = (obj == NULL); 1042 HandleMark hm(thread); 1043 1044 Handle h_obj; 1045 if (!is_static) { 1046 // non-static field accessors have an object, but we need a handle 1047 h_obj = Handle(thread, obj); 1048 } 1049 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1050 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1051 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1052 IRT_END 1053 1054 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1055 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1056 1057 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1058 1059 // check the access_flags for the field in the klass 1060 InstanceKlass* ik = InstanceKlass::cast(k); 1061 int index = cp_entry->field_index(); 1062 // bail out if field modifications are not watched 1063 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1064 1065 char sig_type = '\0'; 1066 1067 switch(cp_entry->flag_state()) { 1068 case btos: sig_type = 'B'; break; 1069 case ztos: sig_type = 'Z'; break; 1070 case ctos: sig_type = 'C'; break; 1071 case stos: sig_type = 'S'; break; 1072 case itos: sig_type = 'I'; break; 1073 case ftos: sig_type = 'F'; break; 1074 case atos: sig_type = 'L'; break; 1075 case ltos: sig_type = 'J'; break; 1076 case dtos: sig_type = 'D'; break; 1077 default: ShouldNotReachHere(); return; 1078 } 1079 bool is_static = (obj == NULL); 1080 1081 HandleMark hm(thread); 1082 instanceKlassHandle h_klass(thread, k); 1083 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1084 jvalue fvalue; 1085 #ifdef _LP64 1086 fvalue = *value; 1087 #else 1088 // Long/double values are stored unaligned and also noncontiguously with 1089 // tagged stacks. We can't just do a simple assignment even in the non- 1090 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1091 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1092 // We assume that the two halves of longs/doubles are stored in interpreter 1093 // stack slots in platform-endian order. 1094 jlong_accessor u; 1095 jint* newval = (jint*)value; 1096 u.words[0] = newval[0]; 1097 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1098 fvalue.j = u.long_value; 1099 #endif // _LP64 1100 1101 Handle h_obj; 1102 if (!is_static) { 1103 // non-static field accessors have an object, but we need a handle 1104 h_obj = Handle(thread, obj); 1105 } 1106 1107 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1108 fid, sig_type, &fvalue); 1109 IRT_END 1110 1111 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1112 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1113 IRT_END 1114 1115 1116 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1117 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1118 IRT_END 1119 1120 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1121 { 1122 return (Interpreter::contains(pc) ? 1 : 0); 1123 } 1124 IRT_END 1125 1126 1127 // Implementation of SignatureHandlerLibrary 1128 1129 address SignatureHandlerLibrary::set_handler_blob() { 1130 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1131 if (handler_blob == NULL) { 1132 return NULL; 1133 } 1134 address handler = handler_blob->code_begin(); 1135 _handler_blob = handler_blob; 1136 _handler = handler; 1137 return handler; 1138 } 1139 1140 void SignatureHandlerLibrary::initialize() { 1141 if (_fingerprints != NULL) { 1142 return; 1143 } 1144 if (set_handler_blob() == NULL) { 1145 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1146 } 1147 1148 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1149 SignatureHandlerLibrary::buffer_size); 1150 _buffer = bb->code_begin(); 1151 1152 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1153 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1154 } 1155 1156 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1157 address handler = _handler; 1158 int insts_size = buffer->pure_insts_size(); 1159 if (handler + insts_size > _handler_blob->code_end()) { 1160 // get a new handler blob 1161 handler = set_handler_blob(); 1162 } 1163 if (handler != NULL) { 1164 memcpy(handler, buffer->insts_begin(), insts_size); 1165 pd_set_handler(handler); 1166 ICache::invalidate_range(handler, insts_size); 1167 _handler = handler + insts_size; 1168 } 1169 return handler; 1170 } 1171 1172 void SignatureHandlerLibrary::add(methodHandle method) { 1173 if (method->signature_handler() == NULL) { 1174 // use slow signature handler if we can't do better 1175 int handler_index = -1; 1176 // check if we can use customized (fast) signature handler 1177 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1178 // use customized signature handler 1179 MutexLocker mu(SignatureHandlerLibrary_lock); 1180 // make sure data structure is initialized 1181 initialize(); 1182 // lookup method signature's fingerprint 1183 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1184 handler_index = _fingerprints->find(fingerprint); 1185 // create handler if necessary 1186 if (handler_index < 0) { 1187 ResourceMark rm; 1188 ptrdiff_t align_offset = (address) 1189 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1190 CodeBuffer buffer((address)(_buffer + align_offset), 1191 SignatureHandlerLibrary::buffer_size - align_offset); 1192 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1193 // copy into code heap 1194 address handler = set_handler(&buffer); 1195 if (handler == NULL) { 1196 // use slow signature handler 1197 } else { 1198 // debugging suppport 1199 if (PrintSignatureHandlers) { 1200 tty->cr(); 1201 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1202 _handlers->length(), 1203 (method->is_static() ? "static" : "receiver"), 1204 method->name_and_sig_as_C_string(), 1205 fingerprint, 1206 buffer.insts_size()); 1207 Disassembler::decode(handler, handler + buffer.insts_size()); 1208 #ifndef PRODUCT 1209 tty->print_cr(" --- associated result handler ---"); 1210 address rh_begin = Interpreter::result_handler(method()->result_type()); 1211 address rh_end = rh_begin; 1212 while (*(int*)rh_end != 0) { 1213 rh_end += sizeof(int); 1214 } 1215 Disassembler::decode(rh_begin, rh_end); 1216 #endif 1217 } 1218 // add handler to library 1219 _fingerprints->append(fingerprint); 1220 _handlers->append(handler); 1221 // set handler index 1222 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1223 handler_index = _fingerprints->length() - 1; 1224 } 1225 } 1226 // Set handler under SignatureHandlerLibrary_lock 1227 if (handler_index < 0) { 1228 // use generic signature handler 1229 method->set_signature_handler(Interpreter::slow_signature_handler()); 1230 } else { 1231 // set handler 1232 method->set_signature_handler(_handlers->at(handler_index)); 1233 } 1234 } else { 1235 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1236 // use generic signature handler 1237 method->set_signature_handler(Interpreter::slow_signature_handler()); 1238 } 1239 } 1240 #ifdef ASSERT 1241 int handler_index = -1; 1242 int fingerprint_index = -2; 1243 { 1244 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1245 // in any way if accessed from multiple threads. To avoid races with another 1246 // thread which may change the arrays in the above, mutex protected block, we 1247 // have to protect this read access here with the same mutex as well! 1248 MutexLocker mu(SignatureHandlerLibrary_lock); 1249 if (_handlers != NULL) { 1250 handler_index = _handlers->find(method->signature_handler()); 1251 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1252 } 1253 } 1254 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1255 handler_index == fingerprint_index, "sanity check"); 1256 #endif // ASSERT 1257 } 1258 1259 1260 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1261 address SignatureHandlerLibrary::_handler = NULL; 1262 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1263 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1264 address SignatureHandlerLibrary::_buffer = NULL; 1265 1266 1267 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1268 methodHandle m(thread, method); 1269 assert(m->is_native(), "sanity check"); 1270 // lookup native function entry point if it doesn't exist 1271 bool in_base_library; 1272 if (!m->has_native_function()) { 1273 NativeLookup::lookup(m, in_base_library, CHECK); 1274 } 1275 // make sure signature handler is installed 1276 SignatureHandlerLibrary::add(m); 1277 // The interpreter entry point checks the signature handler first, 1278 // before trying to fetch the native entry point and klass mirror. 1279 // We must set the signature handler last, so that multiple processors 1280 // preparing the same method will be sure to see non-null entry & mirror. 1281 IRT_END 1282 1283 #if defined(IA32) || defined(AMD64) || defined(ARM) || defined(AARCH64) 1284 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1285 if (src_address == dest_address) { 1286 return; 1287 } 1288 ResetNoHandleMark rnm; // In a LEAF entry. 1289 HandleMark hm; 1290 ResourceMark rm; 1291 frame fr = thread->last_frame(); 1292 assert(fr.is_interpreted_frame(), ""); 1293 jint bci = fr.interpreter_frame_bci(); 1294 methodHandle mh(thread, fr.interpreter_frame_method()); 1295 Bytecode_invoke invoke(mh, bci); 1296 ArgumentSizeComputer asc(invoke.signature()); 1297 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1298 Copy::conjoint_jbytes(src_address, dest_address, 1299 size_of_arguments * Interpreter::stackElementSize); 1300 IRT_END 1301 #endif 1302 1303 #if INCLUDE_JVMTI 1304 // This is a support of the JVMTI PopFrame interface. 1305 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1306 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1307 // The member_name argument is a saved reference (in local#0) to the member_name. 1308 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1309 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1310 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1311 Method* method, address bcp)) 1312 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1313 if (code != Bytecodes::_invokestatic) { 1314 return; 1315 } 1316 ConstantPool* cpool = method->constants(); 1317 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1318 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1319 Symbol* mname = cpool->name_ref_at(cp_index); 1320 1321 if (MethodHandles::has_member_arg(cname, mname)) { 1322 oop member_name_oop = (oop) member_name; 1323 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1324 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1325 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1326 } 1327 thread->set_vm_result(member_name_oop); 1328 } else { 1329 thread->set_vm_result(NULL); 1330 } 1331 IRT_END 1332 #endif // INCLUDE_JVMTI