1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compileBroker.hpp" 29 #include "compiler/disassembler.hpp" 30 #include "gc_interface/collectedHeap.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "interpreter/interpreterRuntime.hpp" 33 #include "interpreter/linkResolver.hpp" 34 #include "interpreter/templateTable.hpp" 35 #include "memory/oopFactory.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/constantPool.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/methodData.hpp" 40 #include "oops/objArrayKlass.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "oops/symbol.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "prims/nativeLookup.hpp" 45 #include "runtime/biasedLocking.hpp" 46 #include "runtime/compilationPolicy.hpp" 47 #include "runtime/deoptimization.hpp" 48 #include "runtime/fieldDescriptor.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/jfieldIDWorkaround.hpp" 53 #include "runtime/osThread.hpp" 54 #include "runtime/sharedRuntime.hpp" 55 #include "runtime/stubRoutines.hpp" 56 #include "runtime/synchronizer.hpp" 57 #include "runtime/threadCritical.hpp" 58 #include "utilities/events.hpp" 59 #ifdef TARGET_ARCH_x86 60 # include "vm_version_x86.hpp" 61 #endif 62 #ifdef TARGET_ARCH_sparc 63 # include "vm_version_sparc.hpp" 64 #endif 65 #ifdef TARGET_ARCH_zero 66 # include "vm_version_zero.hpp" 67 #endif 68 #ifdef TARGET_ARCH_arm 69 # include "vm_version_arm.hpp" 70 #endif 71 #ifdef TARGET_ARCH_ppc 72 # include "vm_version_ppc.hpp" 73 #endif 74 #ifdef COMPILER2 75 #include "opto/runtime.hpp" 76 #endif 77 78 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 79 80 class UnlockFlagSaver { 81 private: 82 JavaThread* _thread; 83 bool _do_not_unlock; 84 public: 85 UnlockFlagSaver(JavaThread* t) { 86 _thread = t; 87 _do_not_unlock = t->do_not_unlock_if_synchronized(); 88 t->set_do_not_unlock_if_synchronized(false); 89 } 90 ~UnlockFlagSaver() { 91 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 92 } 93 }; 94 95 //------------------------------------------------------------------------------------------------------------------------ 96 // State accessors 97 98 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 99 last_frame(thread).interpreter_frame_set_bcp(bcp); 100 if (ProfileInterpreter) { 101 // ProfileTraps uses MDOs independently of ProfileInterpreter. 102 // That is why we must check both ProfileInterpreter and mdo != NULL. 103 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 104 if (mdo != NULL) { 105 NEEDS_CLEANUP; 106 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 107 } 108 } 109 } 110 111 //------------------------------------------------------------------------------------------------------------------------ 112 // Constants 113 114 115 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 116 // access constant pool 117 ConstantPool* pool = method(thread)->constants(); 118 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 119 constantTag tag = pool->tag_at(index); 120 121 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 122 Klass* klass = pool->klass_at(index, CHECK); 123 oop java_class = klass->java_mirror(); 124 thread->set_vm_result(java_class); 125 IRT_END 126 127 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 128 assert(bytecode == Bytecodes::_fast_aldc || 129 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 130 ResourceMark rm(thread); 131 methodHandle m (thread, method(thread)); 132 Bytecode_loadconstant ldc(m, bci(thread)); 133 oop result = ldc.resolve_constant(CHECK); 134 #ifdef ASSERT 135 { 136 // The bytecode wrappers aren't GC-safe so construct a new one 137 Bytecode_loadconstant ldc2(m, bci(thread)); 138 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 139 assert(result == coop, "expected result for assembly code"); 140 } 141 #endif 142 thread->set_vm_result(result); 143 } 144 IRT_END 145 146 147 //------------------------------------------------------------------------------------------------------------------------ 148 // Allocation 149 150 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 151 Klass* k_oop = pool->klass_at(index, CHECK); 152 instanceKlassHandle klass (THREAD, k_oop); 153 154 // Make sure we are not instantiating an abstract klass 155 klass->check_valid_for_instantiation(true, CHECK); 156 157 // Make sure klass is initialized 158 klass->initialize(CHECK); 159 160 // At this point the class may not be fully initialized 161 // because of recursive initialization. If it is fully 162 // initialized & has_finalized is not set, we rewrite 163 // it into its fast version (Note: no locking is needed 164 // here since this is an atomic byte write and can be 165 // done more than once). 166 // 167 // Note: In case of classes with has_finalized we don't 168 // rewrite since that saves us an extra check in 169 // the fast version which then would call the 170 // slow version anyway (and do a call back into 171 // Java). 172 // If we have a breakpoint, then we don't rewrite 173 // because the _breakpoint bytecode would be lost. 174 oop obj = klass->allocate_instance(CHECK); 175 thread->set_vm_result(obj); 176 IRT_END 177 178 179 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 180 oop obj = oopFactory::new_typeArray(type, size, CHECK); 181 thread->set_vm_result(obj); 182 IRT_END 183 184 185 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 186 // Note: no oopHandle for pool & klass needed since they are not used 187 // anymore after new_objArray() and no GC can happen before. 188 // (This may have to change if this code changes!) 189 Klass* klass = pool->klass_at(index, CHECK); 190 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 191 thread->set_vm_result(obj); 192 IRT_END 193 194 195 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 196 // We may want to pass in more arguments - could make this slightly faster 197 ConstantPool* constants = method(thread)->constants(); 198 int i = get_index_u2(thread, Bytecodes::_multianewarray); 199 Klass* klass = constants->klass_at(i, CHECK); 200 int nof_dims = number_of_dimensions(thread); 201 assert(klass->is_klass(), "not a class"); 202 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 203 204 // We must create an array of jints to pass to multi_allocate. 205 ResourceMark rm(thread); 206 const int small_dims = 10; 207 jint dim_array[small_dims]; 208 jint *dims = &dim_array[0]; 209 if (nof_dims > small_dims) { 210 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 211 } 212 for (int index = 0; index < nof_dims; index++) { 213 // offset from first_size_address is addressed as local[index] 214 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 215 dims[index] = first_size_address[n]; 216 } 217 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 218 thread->set_vm_result(obj); 219 IRT_END 220 221 222 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 223 assert(obj->is_oop(), "must be a valid oop"); 224 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 225 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 226 IRT_END 227 228 229 // Quicken instance-of and check-cast bytecodes 230 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 231 // Force resolving; quicken the bytecode 232 int which = get_index_u2(thread, Bytecodes::_checkcast); 233 ConstantPool* cpool = method(thread)->constants(); 234 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 235 // program we might have seen an unquick'd bytecode in the interpreter but have another 236 // thread quicken the bytecode before we get here. 237 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 238 Klass* klass = cpool->klass_at(which, CHECK); 239 thread->set_vm_result_2(klass); 240 IRT_END 241 242 243 //------------------------------------------------------------------------------------------------------------------------ 244 // Exceptions 245 246 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 247 methodHandle trap_method, int trap_bci, TRAPS) { 248 if (trap_method.not_null()) { 249 MethodData* trap_mdo = trap_method->method_data(); 250 if (trap_mdo == NULL) { 251 Method::build_interpreter_method_data(trap_method, THREAD); 252 if (HAS_PENDING_EXCEPTION) { 253 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 254 "we expect only an OOM error here"); 255 CLEAR_PENDING_EXCEPTION; 256 } 257 trap_mdo = trap_method->method_data(); 258 // and fall through... 259 } 260 if (trap_mdo != NULL) { 261 // Update per-method count of trap events. The interpreter 262 // is updating the MDO to simulate the effect of compiler traps. 263 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 264 } 265 } 266 } 267 268 // Assume the compiler is (or will be) interested in this event. 269 // If necessary, create an MDO to hold the information, and record it. 270 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 271 assert(ProfileTraps, "call me only if profiling"); 272 methodHandle trap_method(thread, method(thread)); 273 int trap_bci = trap_method->bci_from(bcp(thread)); 274 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 275 } 276 277 #ifdef CC_INTERP 278 // As legacy note_trap, but we have more arguments. 279 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 280 methodHandle trap_method(method); 281 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 282 IRT_END 283 284 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 285 // for each exception. 286 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 287 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 288 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 289 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 290 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 291 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 292 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 293 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 294 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 295 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 296 #endif // CC_INTERP 297 298 299 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 300 // get klass 301 InstanceKlass* klass = InstanceKlass::cast(k); 302 assert(klass->is_initialized(), 303 "this klass should have been initialized during VM initialization"); 304 // create instance - do not call constructor since we may have no 305 // (java) stack space left (should assert constructor is empty) 306 Handle exception; 307 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 308 exception = Handle(THREAD, exception_oop); 309 if (StackTraceInThrowable) { 310 java_lang_Throwable::fill_in_stack_trace(exception); 311 } 312 return exception; 313 } 314 315 // Special handling for stack overflow: since we don't have any (java) stack 316 // space left we use the pre-allocated & pre-initialized StackOverflowError 317 // klass to create an stack overflow error instance. We do not call its 318 // constructor for the same reason (it is empty, anyway). 319 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 320 Handle exception = get_preinitialized_exception( 321 SystemDictionary::StackOverflowError_klass(), 322 CHECK); 323 THROW_HANDLE(exception); 324 IRT_END 325 326 327 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 328 // lookup exception klass 329 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 330 if (ProfileTraps) { 331 if (s == vmSymbols::java_lang_ArithmeticException()) { 332 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 333 } else if (s == vmSymbols::java_lang_NullPointerException()) { 334 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 335 } 336 } 337 // create exception 338 Handle exception = Exceptions::new_exception(thread, s, message); 339 thread->set_vm_result(exception()); 340 IRT_END 341 342 343 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 344 ResourceMark rm(thread); 345 const char* klass_name = obj->klass()->external_name(); 346 // lookup exception klass 347 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 348 if (ProfileTraps) { 349 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 350 } 351 // create exception, with klass name as detail message 352 Handle exception = Exceptions::new_exception(thread, s, klass_name); 353 thread->set_vm_result(exception()); 354 IRT_END 355 356 357 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) 358 char message[jintAsStringSize]; 359 // lookup exception klass 360 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); 361 if (ProfileTraps) { 362 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 363 } 364 // create exception 365 sprintf(message, "%d", index); 366 THROW_MSG(s, message); 367 IRT_END 368 369 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 370 JavaThread* thread, oopDesc* obj)) 371 372 ResourceMark rm(thread); 373 char* message = SharedRuntime::generate_class_cast_message( 374 thread, obj->klass()->external_name()); 375 376 if (ProfileTraps) { 377 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 378 } 379 380 // create exception 381 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 382 IRT_END 383 384 // exception_handler_for_exception(...) returns the continuation address, 385 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 386 // The exception oop is returned to make sure it is preserved over GC (it 387 // is only on the stack if the exception was thrown explicitly via athrow). 388 // During this operation, the expression stack contains the values for the 389 // bci where the exception happened. If the exception was propagated back 390 // from a call, the expression stack contains the values for the bci at the 391 // invoke w/o arguments (i.e., as if one were inside the call). 392 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 393 394 Handle h_exception(thread, exception); 395 methodHandle h_method (thread, method(thread)); 396 constantPoolHandle h_constants(thread, h_method->constants()); 397 bool should_repeat; 398 int handler_bci; 399 int current_bci = bci(thread); 400 401 if (thread->frames_to_pop_failed_realloc() > 0) { 402 // Allocation of scalar replaced object used in this frame 403 // failed. Unconditionally pop the frame. 404 thread->dec_frames_to_pop_failed_realloc(); 405 thread->set_vm_result(h_exception()); 406 // If the method is synchronized we already unlocked the monitor 407 // during deoptimization so the interpreter needs to skip it when 408 // the frame is popped. 409 thread->set_do_not_unlock_if_synchronized(true); 410 #ifdef CC_INTERP 411 return (address) -1; 412 #else 413 return Interpreter::remove_activation_entry(); 414 #endif 415 } 416 417 // Need to do this check first since when _do_not_unlock_if_synchronized 418 // is set, we don't want to trigger any classloading which may make calls 419 // into java, or surprisingly find a matching exception handler for bci 0 420 // since at this moment the method hasn't been "officially" entered yet. 421 if (thread->do_not_unlock_if_synchronized()) { 422 ResourceMark rm; 423 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 424 thread->set_vm_result(exception); 425 #ifdef CC_INTERP 426 return (address) -1; 427 #else 428 return Interpreter::remove_activation_entry(); 429 #endif 430 } 431 432 do { 433 should_repeat = false; 434 435 // assertions 436 #ifdef ASSERT 437 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 438 assert(h_exception->is_oop(), "just checking"); 439 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 440 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 441 if (ExitVMOnVerifyError) vm_exit(-1); 442 ShouldNotReachHere(); 443 } 444 #endif 445 446 // tracing 447 if (TraceExceptions) { 448 ttyLocker ttyl; 449 ResourceMark rm(thread); 450 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 451 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 452 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 453 } 454 // Don't go paging in something which won't be used. 455 // else if (extable->length() == 0) { 456 // // disabled for now - interpreter is not using shortcut yet 457 // // (shortcut is not to call runtime if we have no exception handlers) 458 // // warning("performance bug: should not call runtime if method has no exception handlers"); 459 // } 460 // for AbortVMOnException flag 461 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 462 463 // exception handler lookup 464 KlassHandle h_klass(THREAD, h_exception->klass()); 465 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 466 if (HAS_PENDING_EXCEPTION) { 467 // We threw an exception while trying to find the exception handler. 468 // Transfer the new exception to the exception handle which will 469 // be set into thread local storage, and do another lookup for an 470 // exception handler for this exception, this time starting at the 471 // BCI of the exception handler which caused the exception to be 472 // thrown (bug 4307310). 473 h_exception = Handle(THREAD, PENDING_EXCEPTION); 474 CLEAR_PENDING_EXCEPTION; 475 if (handler_bci >= 0) { 476 current_bci = handler_bci; 477 should_repeat = true; 478 } 479 } 480 } while (should_repeat == true); 481 482 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 483 // time throw or a stack unwinding throw and accordingly notify the debugger 484 if (JvmtiExport::can_post_on_exceptions()) { 485 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 486 } 487 488 #ifdef CC_INTERP 489 address continuation = (address)(intptr_t) handler_bci; 490 #else 491 address continuation = NULL; 492 #endif 493 address handler_pc = NULL; 494 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 495 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 496 // handler in this method, or (b) after a stack overflow there is not yet 497 // enough stack space available to reprotect the stack. 498 #ifndef CC_INTERP 499 continuation = Interpreter::remove_activation_entry(); 500 #endif 501 // Count this for compilation purposes 502 h_method->interpreter_throwout_increment(THREAD); 503 } else { 504 // handler in this method => change bci/bcp to handler bci/bcp and continue there 505 handler_pc = h_method->code_base() + handler_bci; 506 #ifndef CC_INTERP 507 set_bcp_and_mdp(handler_pc, thread); 508 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 509 #endif 510 } 511 // notify debugger of an exception catch 512 // (this is good for exceptions caught in native methods as well) 513 if (JvmtiExport::can_post_on_exceptions()) { 514 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 515 } 516 517 thread->set_vm_result(h_exception()); 518 return continuation; 519 IRT_END 520 521 522 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 523 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 524 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 525 IRT_END 526 527 528 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 529 THROW(vmSymbols::java_lang_AbstractMethodError()); 530 IRT_END 531 532 533 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 534 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 535 IRT_END 536 537 538 //------------------------------------------------------------------------------------------------------------------------ 539 // Fields 540 // 541 542 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 543 // resolve field 544 fieldDescriptor info; 545 constantPoolHandle pool(thread, method(thread)->constants()); 546 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); 547 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 548 549 { 550 JvmtiHideSingleStepping jhss(thread); 551 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 552 bytecode, CHECK); 553 } // end JvmtiHideSingleStepping 554 555 // check if link resolution caused cpCache to be updated 556 if (already_resolved(thread)) return; 557 558 // compute auxiliary field attributes 559 TosState state = as_TosState(info.field_type()); 560 561 // We need to delay resolving put instructions on final fields 562 // until we actually invoke one. This is required so we throw 563 // exceptions at the correct place. If we do not resolve completely 564 // in the current pass, leaving the put_code set to zero will 565 // cause the next put instruction to reresolve. 566 Bytecodes::Code put_code = (Bytecodes::Code)0; 567 568 // We also need to delay resolving getstatic instructions until the 569 // class is intitialized. This is required so that access to the static 570 // field will call the initialization function every time until the class 571 // is completely initialized ala. in 2.17.5 in JVM Specification. 572 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 573 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 574 !klass->is_initialized()); 575 Bytecodes::Code get_code = (Bytecodes::Code)0; 576 577 if (!uninitialized_static) { 578 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 579 if (is_put || !info.access_flags().is_final()) { 580 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 581 } 582 } 583 584 cache_entry(thread)->set_field( 585 get_code, 586 put_code, 587 info.field_holder(), 588 info.index(), 589 info.offset(), 590 state, 591 info.access_flags().is_final(), 592 info.access_flags().is_volatile(), 593 pool->pool_holder() 594 ); 595 IRT_END 596 597 598 //------------------------------------------------------------------------------------------------------------------------ 599 // Synchronization 600 // 601 // The interpreter's synchronization code is factored out so that it can 602 // be shared by method invocation and synchronized blocks. 603 //%note synchronization_3 604 605 //%note monitor_1 606 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 607 #ifdef ASSERT 608 thread->last_frame().interpreter_frame_verify_monitor(elem); 609 #endif 610 if (PrintBiasedLockingStatistics) { 611 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 612 } 613 Handle h_obj(thread, elem->obj()); 614 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 615 "must be NULL or an object"); 616 if (UseBiasedLocking) { 617 // Retry fast entry if bias is revoked to avoid unnecessary inflation 618 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 619 } else { 620 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 621 } 622 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 623 "must be NULL or an object"); 624 #ifdef ASSERT 625 thread->last_frame().interpreter_frame_verify_monitor(elem); 626 #endif 627 IRT_END 628 629 630 //%note monitor_1 631 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 632 #ifdef ASSERT 633 thread->last_frame().interpreter_frame_verify_monitor(elem); 634 #endif 635 Handle h_obj(thread, elem->obj()); 636 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 637 "must be NULL or an object"); 638 if (elem == NULL || h_obj()->is_unlocked()) { 639 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 640 } 641 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 642 // Free entry. This must be done here, since a pending exception might be installed on 643 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 644 elem->set_obj(NULL); 645 #ifdef ASSERT 646 thread->last_frame().interpreter_frame_verify_monitor(elem); 647 #endif 648 IRT_END 649 650 651 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 652 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 653 IRT_END 654 655 656 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 657 // Returns an illegal exception to install into the current thread. The 658 // pending_exception flag is cleared so normal exception handling does not 659 // trigger. Any current installed exception will be overwritten. This 660 // method will be called during an exception unwind. 661 662 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 663 Handle exception(thread, thread->vm_result()); 664 assert(exception() != NULL, "vm result should be set"); 665 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 666 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 667 exception = get_preinitialized_exception( 668 SystemDictionary::IllegalMonitorStateException_klass(), 669 CATCH); 670 } 671 thread->set_vm_result(exception()); 672 IRT_END 673 674 675 //------------------------------------------------------------------------------------------------------------------------ 676 // Invokes 677 678 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 679 return method->orig_bytecode_at(method->bci_from(bcp)); 680 IRT_END 681 682 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 683 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 684 IRT_END 685 686 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 687 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 688 IRT_END 689 690 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { 691 // extract receiver from the outgoing argument list if necessary 692 Handle receiver(thread, NULL); 693 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 694 bytecode == Bytecodes::_invokespecial) { 695 ResourceMark rm(thread); 696 methodHandle m (thread, method(thread)); 697 Bytecode_invoke call(m, bci(thread)); 698 Symbol* signature = call.signature(); 699 receiver = Handle(thread, 700 thread->last_frame().interpreter_callee_receiver(signature)); 701 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 702 "sanity check"); 703 assert(receiver.is_null() || 704 !Universe::heap()->is_in_reserved(receiver->klass()), 705 "sanity check"); 706 } 707 708 // resolve method 709 CallInfo info; 710 constantPoolHandle pool(thread, method(thread)->constants()); 711 712 { 713 JvmtiHideSingleStepping jhss(thread); 714 LinkResolver::resolve_invoke(info, receiver, pool, 715 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 716 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 717 int retry_count = 0; 718 while (info.resolved_method()->is_old()) { 719 // It is very unlikely that method is redefined more than 100 times 720 // in the middle of resolve. If it is looping here more than 100 times 721 // means then there could be a bug here. 722 guarantee((retry_count++ < 100), 723 "Could not resolve to latest version of redefined method"); 724 // method is redefined in the middle of resolve so re-try. 725 LinkResolver::resolve_invoke(info, receiver, pool, 726 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 727 } 728 } 729 } // end JvmtiHideSingleStepping 730 731 // check if link resolution caused cpCache to be updated 732 if (already_resolved(thread)) return; 733 734 if (bytecode == Bytecodes::_invokeinterface) { 735 if (TraceItables && Verbose) { 736 ResourceMark rm(thread); 737 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 738 } 739 } 740 #ifdef ASSERT 741 if (bytecode == Bytecodes::_invokeinterface) { 742 if (info.resolved_method()->method_holder() == 743 SystemDictionary::Object_klass()) { 744 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 745 // (see also CallInfo::set_interface for details) 746 assert(info.call_kind() == CallInfo::vtable_call || 747 info.call_kind() == CallInfo::direct_call, ""); 748 methodHandle rm = info.resolved_method(); 749 assert(rm->is_final() || info.has_vtable_index(), 750 "should have been set already"); 751 } else if (!info.resolved_method()->has_itable_index()) { 752 // Resolved something like CharSequence.toString. Use vtable not itable. 753 assert(info.call_kind() != CallInfo::itable_call, ""); 754 } else { 755 // Setup itable entry 756 assert(info.call_kind() == CallInfo::itable_call, ""); 757 int index = info.resolved_method()->itable_index(); 758 assert(info.itable_index() == index, ""); 759 } 760 } else if (bytecode == Bytecodes::_invokespecial) { 761 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 762 } else { 763 assert(info.call_kind() == CallInfo::direct_call || 764 info.call_kind() == CallInfo::vtable_call, ""); 765 } 766 #endif 767 // Get sender or sender's host_klass, and only set cpCache entry to resolved if 768 // it is not an interface. The receiver for invokespecial calls within interface 769 // methods must be checked for every call. 770 InstanceKlass* sender = pool->pool_holder(); 771 sender = sender->has_host_klass() ? InstanceKlass::cast(sender->host_klass()) : sender; 772 773 switch (info.call_kind()) { 774 case CallInfo::direct_call: 775 cache_entry(thread)->set_direct_call( 776 bytecode, 777 info.resolved_method(), 778 sender->is_interface()); 779 break; 780 case CallInfo::vtable_call: 781 cache_entry(thread)->set_vtable_call( 782 bytecode, 783 info.resolved_method(), 784 info.vtable_index()); 785 break; 786 case CallInfo::itable_call: 787 cache_entry(thread)->set_itable_call( 788 bytecode, 789 info.resolved_klass(), 790 info.resolved_method(), 791 info.itable_index()); 792 break; 793 default: ShouldNotReachHere(); 794 } 795 } 796 IRT_END 797 798 799 // First time execution: Resolve symbols, create a permanent MethodType object. 800 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { 801 assert(EnableInvokeDynamic, ""); 802 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 803 804 // resolve method 805 CallInfo info; 806 constantPoolHandle pool(thread, method(thread)->constants()); 807 808 { 809 JvmtiHideSingleStepping jhss(thread); 810 LinkResolver::resolve_invoke(info, Handle(), pool, 811 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 812 } // end JvmtiHideSingleStepping 813 814 cache_entry(thread)->set_method_handle(pool, info); 815 } 816 IRT_END 817 818 819 // First time execution: Resolve symbols, create a permanent CallSite object. 820 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 821 assert(EnableInvokeDynamic, ""); 822 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 823 824 //TO DO: consider passing BCI to Java. 825 // int caller_bci = method(thread)->bci_from(bcp(thread)); 826 827 // resolve method 828 CallInfo info; 829 constantPoolHandle pool(thread, method(thread)->constants()); 830 int index = get_index_u4(thread, bytecode); 831 { 832 JvmtiHideSingleStepping jhss(thread); 833 LinkResolver::resolve_invoke(info, Handle(), pool, 834 index, bytecode, CHECK); 835 } // end JvmtiHideSingleStepping 836 837 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 838 cp_cache_entry->set_dynamic_call(pool, info); 839 } 840 IRT_END 841 842 843 //------------------------------------------------------------------------------------------------------------------------ 844 // Miscellaneous 845 846 847 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 848 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 849 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 850 if (branch_bcp != NULL && nm != NULL) { 851 // This was a successful request for an OSR nmethod. Because 852 // frequency_counter_overflow_inner ends with a safepoint check, 853 // nm could have been unloaded so look it up again. It's unsafe 854 // to examine nm directly since it might have been freed and used 855 // for something else. 856 frame fr = thread->last_frame(); 857 Method* method = fr.interpreter_frame_method(); 858 int bci = method->bci_from(fr.interpreter_frame_bcp()); 859 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 860 } 861 #ifndef PRODUCT 862 if (TraceOnStackReplacement) { 863 if (nm != NULL) { 864 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 865 nm->print(); 866 } 867 } 868 #endif 869 return nm; 870 } 871 872 IRT_ENTRY(nmethod*, 873 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 874 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 875 // flag, in case this method triggers classloading which will call into Java. 876 UnlockFlagSaver fs(thread); 877 878 frame fr = thread->last_frame(); 879 assert(fr.is_interpreted_frame(), "must come from interpreter"); 880 methodHandle method(thread, fr.interpreter_frame_method()); 881 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 882 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 883 884 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 885 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 886 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 887 888 if (osr_nm != NULL) { 889 // We may need to do on-stack replacement which requires that no 890 // monitors in the activation are biased because their 891 // BasicObjectLocks will need to migrate during OSR. Force 892 // unbiasing of all monitors in the activation now (even though 893 // the OSR nmethod might be invalidated) because we don't have a 894 // safepoint opportunity later once the migration begins. 895 if (UseBiasedLocking) { 896 ResourceMark rm; 897 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 898 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 899 kptr < fr.interpreter_frame_monitor_begin(); 900 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 901 if( kptr->obj() != NULL ) { 902 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 903 } 904 } 905 BiasedLocking::revoke(objects_to_revoke); 906 } 907 } 908 return osr_nm; 909 IRT_END 910 911 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 912 assert(ProfileInterpreter, "must be profiling interpreter"); 913 int bci = method->bci_from(cur_bcp); 914 MethodData* mdo = method->method_data(); 915 if (mdo == NULL) return 0; 916 return mdo->bci_to_di(bci); 917 IRT_END 918 919 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 920 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 921 // flag, in case this method triggers classloading which will call into Java. 922 UnlockFlagSaver fs(thread); 923 924 assert(ProfileInterpreter, "must be profiling interpreter"); 925 frame fr = thread->last_frame(); 926 assert(fr.is_interpreted_frame(), "must come from interpreter"); 927 methodHandle method(thread, fr.interpreter_frame_method()); 928 Method::build_interpreter_method_data(method, THREAD); 929 if (HAS_PENDING_EXCEPTION) { 930 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 931 CLEAR_PENDING_EXCEPTION; 932 // and fall through... 933 } 934 IRT_END 935 936 937 #ifdef ASSERT 938 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 939 assert(ProfileInterpreter, "must be profiling interpreter"); 940 941 MethodData* mdo = method->method_data(); 942 assert(mdo != NULL, "must not be null"); 943 944 int bci = method->bci_from(bcp); 945 946 address mdp2 = mdo->bci_to_dp(bci); 947 if (mdp != mdp2) { 948 ResourceMark rm; 949 ResetNoHandleMark rnm; // In a LEAF entry. 950 HandleMark hm; 951 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 952 int current_di = mdo->dp_to_di(mdp); 953 int expected_di = mdo->dp_to_di(mdp2); 954 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 955 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 956 int approx_bci = -1; 957 if (current_di >= 0) { 958 approx_bci = mdo->data_at(current_di)->bci(); 959 } 960 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 961 mdo->print_on(tty); 962 method->print_codes(); 963 } 964 assert(mdp == mdp2, "wrong mdp"); 965 IRT_END 966 #endif // ASSERT 967 968 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 969 assert(ProfileInterpreter, "must be profiling interpreter"); 970 ResourceMark rm(thread); 971 HandleMark hm(thread); 972 frame fr = thread->last_frame(); 973 assert(fr.is_interpreted_frame(), "must come from interpreter"); 974 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 975 976 // Grab a lock to ensure atomic access to setting the return bci and 977 // the displacement. This can block and GC, invalidating all naked oops. 978 MutexLocker ml(RetData_lock); 979 980 // ProfileData is essentially a wrapper around a derived oop, so we 981 // need to take the lock before making any ProfileData structures. 982 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 983 guarantee(data != NULL, "profile data must be valid"); 984 RetData* rdata = data->as_RetData(); 985 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 986 fr.interpreter_frame_set_mdp(new_mdp); 987 IRT_END 988 989 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 990 MethodCounters* mcs = Method::build_method_counters(m, thread); 991 if (HAS_PENDING_EXCEPTION) { 992 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 993 CLEAR_PENDING_EXCEPTION; 994 } 995 return mcs; 996 IRT_END 997 998 999 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1000 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1001 // stack traversal automatically takes care of preserving arguments for invoke, so 1002 // this is no longer needed. 1003 1004 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1005 // if this is called during a safepoint 1006 1007 if (JvmtiExport::should_post_single_step()) { 1008 // We are called during regular safepoints and when the VM is 1009 // single stepping. If any thread is marked for single stepping, 1010 // then we may have JVMTI work to do. 1011 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1012 } 1013 IRT_END 1014 1015 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1016 ConstantPoolCacheEntry *cp_entry)) 1017 1018 // check the access_flags for the field in the klass 1019 1020 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1021 int index = cp_entry->field_index(); 1022 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1023 1024 switch(cp_entry->flag_state()) { 1025 case btos: // fall through 1026 case ztos: // fall through 1027 case ctos: // fall through 1028 case stos: // fall through 1029 case itos: // fall through 1030 case ftos: // fall through 1031 case ltos: // fall through 1032 case dtos: // fall through 1033 case atos: break; 1034 default: ShouldNotReachHere(); return; 1035 } 1036 bool is_static = (obj == NULL); 1037 HandleMark hm(thread); 1038 1039 Handle h_obj; 1040 if (!is_static) { 1041 // non-static field accessors have an object, but we need a handle 1042 h_obj = Handle(thread, obj); 1043 } 1044 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1045 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1046 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1047 IRT_END 1048 1049 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1050 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1051 1052 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1053 1054 // check the access_flags for the field in the klass 1055 InstanceKlass* ik = InstanceKlass::cast(k); 1056 int index = cp_entry->field_index(); 1057 // bail out if field modifications are not watched 1058 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1059 1060 char sig_type = '\0'; 1061 1062 switch(cp_entry->flag_state()) { 1063 case btos: sig_type = 'B'; break; 1064 case ztos: sig_type = 'Z'; break; 1065 case ctos: sig_type = 'C'; break; 1066 case stos: sig_type = 'S'; break; 1067 case itos: sig_type = 'I'; break; 1068 case ftos: sig_type = 'F'; break; 1069 case atos: sig_type = 'L'; break; 1070 case ltos: sig_type = 'J'; break; 1071 case dtos: sig_type = 'D'; break; 1072 default: ShouldNotReachHere(); return; 1073 } 1074 bool is_static = (obj == NULL); 1075 1076 HandleMark hm(thread); 1077 instanceKlassHandle h_klass(thread, k); 1078 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1079 jvalue fvalue; 1080 #ifdef _LP64 1081 fvalue = *value; 1082 #else 1083 // Long/double values are stored unaligned and also noncontiguously with 1084 // tagged stacks. We can't just do a simple assignment even in the non- 1085 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1086 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1087 // We assume that the two halves of longs/doubles are stored in interpreter 1088 // stack slots in platform-endian order. 1089 jlong_accessor u; 1090 jint* newval = (jint*)value; 1091 u.words[0] = newval[0]; 1092 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1093 fvalue.j = u.long_value; 1094 #endif // _LP64 1095 1096 Handle h_obj; 1097 if (!is_static) { 1098 // non-static field accessors have an object, but we need a handle 1099 h_obj = Handle(thread, obj); 1100 } 1101 1102 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1103 fid, sig_type, &fvalue); 1104 IRT_END 1105 1106 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1107 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1108 IRT_END 1109 1110 1111 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1112 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1113 IRT_END 1114 1115 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1116 { 1117 return (Interpreter::contains(pc) ? 1 : 0); 1118 } 1119 IRT_END 1120 1121 1122 // Implementation of SignatureHandlerLibrary 1123 1124 address SignatureHandlerLibrary::set_handler_blob() { 1125 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1126 if (handler_blob == NULL) { 1127 return NULL; 1128 } 1129 address handler = handler_blob->code_begin(); 1130 _handler_blob = handler_blob; 1131 _handler = handler; 1132 return handler; 1133 } 1134 1135 void SignatureHandlerLibrary::initialize() { 1136 if (_fingerprints != NULL) { 1137 return; 1138 } 1139 if (set_handler_blob() == NULL) { 1140 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1141 } 1142 1143 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1144 SignatureHandlerLibrary::buffer_size); 1145 _buffer = bb->code_begin(); 1146 1147 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1148 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1149 } 1150 1151 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1152 address handler = _handler; 1153 int insts_size = buffer->pure_insts_size(); 1154 if (handler + insts_size > _handler_blob->code_end()) { 1155 // get a new handler blob 1156 handler = set_handler_blob(); 1157 } 1158 if (handler != NULL) { 1159 memcpy(handler, buffer->insts_begin(), insts_size); 1160 pd_set_handler(handler); 1161 ICache::invalidate_range(handler, insts_size); 1162 _handler = handler + insts_size; 1163 } 1164 return handler; 1165 } 1166 1167 void SignatureHandlerLibrary::add(methodHandle method) { 1168 if (method->signature_handler() == NULL) { 1169 // use slow signature handler if we can't do better 1170 int handler_index = -1; 1171 // check if we can use customized (fast) signature handler 1172 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1173 // use customized signature handler 1174 MutexLocker mu(SignatureHandlerLibrary_lock); 1175 // make sure data structure is initialized 1176 initialize(); 1177 // lookup method signature's fingerprint 1178 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1179 handler_index = _fingerprints->find(fingerprint); 1180 // create handler if necessary 1181 if (handler_index < 0) { 1182 ResourceMark rm; 1183 ptrdiff_t align_offset = (address) 1184 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1185 CodeBuffer buffer((address)(_buffer + align_offset), 1186 SignatureHandlerLibrary::buffer_size - align_offset); 1187 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1188 // copy into code heap 1189 address handler = set_handler(&buffer); 1190 if (handler == NULL) { 1191 // use slow signature handler 1192 } else { 1193 // debugging suppport 1194 if (PrintSignatureHandlers) { 1195 tty->cr(); 1196 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1197 _handlers->length(), 1198 (method->is_static() ? "static" : "receiver"), 1199 method->name_and_sig_as_C_string(), 1200 fingerprint, 1201 buffer.insts_size()); 1202 Disassembler::decode(handler, handler + buffer.insts_size()); 1203 #ifndef PRODUCT 1204 tty->print_cr(" --- associated result handler ---"); 1205 address rh_begin = Interpreter::result_handler(method()->result_type()); 1206 address rh_end = rh_begin; 1207 while (*(int*)rh_end != 0) { 1208 rh_end += sizeof(int); 1209 } 1210 Disassembler::decode(rh_begin, rh_end); 1211 #endif 1212 } 1213 // add handler to library 1214 _fingerprints->append(fingerprint); 1215 _handlers->append(handler); 1216 // set handler index 1217 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1218 handler_index = _fingerprints->length() - 1; 1219 } 1220 } 1221 // Set handler under SignatureHandlerLibrary_lock 1222 if (handler_index < 0) { 1223 // use generic signature handler 1224 method->set_signature_handler(Interpreter::slow_signature_handler()); 1225 } else { 1226 // set handler 1227 method->set_signature_handler(_handlers->at(handler_index)); 1228 } 1229 } else { 1230 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1231 // use generic signature handler 1232 method->set_signature_handler(Interpreter::slow_signature_handler()); 1233 } 1234 } 1235 #ifdef ASSERT 1236 int handler_index = -1; 1237 int fingerprint_index = -2; 1238 { 1239 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1240 // in any way if accessed from multiple threads. To avoid races with another 1241 // thread which may change the arrays in the above, mutex protected block, we 1242 // have to protect this read access here with the same mutex as well! 1243 MutexLocker mu(SignatureHandlerLibrary_lock); 1244 if (_handlers != NULL) { 1245 handler_index = _handlers->find(method->signature_handler()); 1246 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1247 } 1248 } 1249 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1250 handler_index == fingerprint_index, "sanity check"); 1251 #endif // ASSERT 1252 } 1253 1254 1255 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1256 address SignatureHandlerLibrary::_handler = NULL; 1257 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1258 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1259 address SignatureHandlerLibrary::_buffer = NULL; 1260 1261 1262 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1263 methodHandle m(thread, method); 1264 assert(m->is_native(), "sanity check"); 1265 // lookup native function entry point if it doesn't exist 1266 bool in_base_library; 1267 if (!m->has_native_function()) { 1268 NativeLookup::lookup(m, in_base_library, CHECK); 1269 } 1270 // make sure signature handler is installed 1271 SignatureHandlerLibrary::add(m); 1272 // The interpreter entry point checks the signature handler first, 1273 // before trying to fetch the native entry point and klass mirror. 1274 // We must set the signature handler last, so that multiple processors 1275 // preparing the same method will be sure to see non-null entry & mirror. 1276 IRT_END 1277 1278 #if defined(IA32) || defined(AMD64) || defined(ARM) 1279 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1280 if (src_address == dest_address) { 1281 return; 1282 } 1283 ResetNoHandleMark rnm; // In a LEAF entry. 1284 HandleMark hm; 1285 ResourceMark rm; 1286 frame fr = thread->last_frame(); 1287 assert(fr.is_interpreted_frame(), ""); 1288 jint bci = fr.interpreter_frame_bci(); 1289 methodHandle mh(thread, fr.interpreter_frame_method()); 1290 Bytecode_invoke invoke(mh, bci); 1291 ArgumentSizeComputer asc(invoke.signature()); 1292 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1293 Copy::conjoint_jbytes(src_address, dest_address, 1294 size_of_arguments * Interpreter::stackElementSize); 1295 IRT_END 1296 #endif 1297 1298 #if INCLUDE_JVMTI 1299 // This is a support of the JVMTI PopFrame interface. 1300 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1301 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1302 // The member_name argument is a saved reference (in local#0) to the member_name. 1303 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1304 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1305 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1306 Method* method, address bcp)) 1307 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1308 if (code != Bytecodes::_invokestatic) { 1309 return; 1310 } 1311 ConstantPool* cpool = method->constants(); 1312 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1313 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1314 Symbol* mname = cpool->name_ref_at(cp_index); 1315 1316 if (MethodHandles::has_member_arg(cname, mname)) { 1317 oop member_name_oop = (oop) member_name; 1318 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1319 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1320 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1321 } 1322 thread->set_vm_result(member_name_oop); 1323 } else { 1324 thread->set_vm_result(NULL); 1325 } 1326 IRT_END 1327 #endif // INCLUDE_JVMTI