1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compileBroker.hpp" 29 #include "compiler/disassembler.hpp" 30 #include "gc_interface/collectedHeap.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "interpreter/interpreterRuntime.hpp" 33 #include "interpreter/linkResolver.hpp" 34 #include "interpreter/templateTable.hpp" 35 #include "memory/oopFactory.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/constantPool.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/methodData.hpp" 40 #include "oops/objArrayKlass.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "oops/symbol.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "prims/nativeLookup.hpp" 45 #include "runtime/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 return Interpreter::remove_activation_entry(); 411 } 412 413 // Need to do this check first since when _do_not_unlock_if_synchronized 414 // is set, we don't want to trigger any classloading which may make calls 415 // into java, or surprisingly find a matching exception handler for bci 0 416 // since at this moment the method hasn't been "officially" entered yet. 417 if (thread->do_not_unlock_if_synchronized()) { 418 ResourceMark rm; 419 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 420 thread->set_vm_result(exception); 421 #ifdef CC_INTERP 422 return (address) -1; 423 #else 424 return Interpreter::remove_activation_entry(); 425 #endif 426 } 427 428 do { 429 should_repeat = false; 430 431 // assertions 432 #ifdef ASSERT 433 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 434 assert(h_exception->is_oop(), "just checking"); 435 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 436 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 437 if (ExitVMOnVerifyError) vm_exit(-1); 438 ShouldNotReachHere(); 439 } 440 #endif 441 442 // tracing 443 if (TraceExceptions) { 444 ttyLocker ttyl; 445 ResourceMark rm(thread); 446 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); 447 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); 448 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); 449 } 450 // Don't go paging in something which won't be used. 451 // else if (extable->length() == 0) { 452 // // disabled for now - interpreter is not using shortcut yet 453 // // (shortcut is not to call runtime if we have no exception handlers) 454 // // warning("performance bug: should not call runtime if method has no exception handlers"); 455 // } 456 // for AbortVMOnException flag 457 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); 458 459 // exception handler lookup 460 KlassHandle h_klass(THREAD, h_exception->klass()); 461 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 462 if (HAS_PENDING_EXCEPTION) { 463 // We threw an exception while trying to find the exception handler. 464 // Transfer the new exception to the exception handle which will 465 // be set into thread local storage, and do another lookup for an 466 // exception handler for this exception, this time starting at the 467 // BCI of the exception handler which caused the exception to be 468 // thrown (bug 4307310). 469 h_exception = Handle(THREAD, PENDING_EXCEPTION); 470 CLEAR_PENDING_EXCEPTION; 471 if (handler_bci >= 0) { 472 current_bci = handler_bci; 473 should_repeat = true; 474 } 475 } 476 } while (should_repeat == true); 477 478 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 479 // time throw or a stack unwinding throw and accordingly notify the debugger 480 if (JvmtiExport::can_post_on_exceptions()) { 481 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 482 } 483 484 #ifdef CC_INTERP 485 address continuation = (address)(intptr_t) handler_bci; 486 #else 487 address continuation = NULL; 488 #endif 489 address handler_pc = NULL; 490 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 491 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 492 // handler in this method, or (b) after a stack overflow there is not yet 493 // enough stack space available to reprotect the stack. 494 #ifndef CC_INTERP 495 continuation = Interpreter::remove_activation_entry(); 496 #endif 497 // Count this for compilation purposes 498 h_method->interpreter_throwout_increment(THREAD); 499 } else { 500 // handler in this method => change bci/bcp to handler bci/bcp and continue there 501 handler_pc = h_method->code_base() + handler_bci; 502 #ifndef CC_INTERP 503 set_bcp_and_mdp(handler_pc, thread); 504 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 505 #endif 506 } 507 // notify debugger of an exception catch 508 // (this is good for exceptions caught in native methods as well) 509 if (JvmtiExport::can_post_on_exceptions()) { 510 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 511 } 512 513 thread->set_vm_result(h_exception()); 514 return continuation; 515 IRT_END 516 517 518 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 519 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 520 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 521 IRT_END 522 523 524 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 525 THROW(vmSymbols::java_lang_AbstractMethodError()); 526 IRT_END 527 528 529 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 530 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 531 IRT_END 532 533 534 //------------------------------------------------------------------------------------------------------------------------ 535 // Fields 536 // 537 538 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) 539 // resolve field 540 fieldDescriptor info; 541 constantPoolHandle pool(thread, method(thread)->constants()); 542 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); 543 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 544 545 { 546 JvmtiHideSingleStepping jhss(thread); 547 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 548 bytecode, CHECK); 549 } // end JvmtiHideSingleStepping 550 551 // check if link resolution caused cpCache to be updated 552 if (already_resolved(thread)) return; 553 554 // compute auxiliary field attributes 555 TosState state = as_TosState(info.field_type()); 556 557 // We need to delay resolving put instructions on final fields 558 // until we actually invoke one. This is required so we throw 559 // exceptions at the correct place. If we do not resolve completely 560 // in the current pass, leaving the put_code set to zero will 561 // cause the next put instruction to reresolve. 562 Bytecodes::Code put_code = (Bytecodes::Code)0; 563 564 // We also need to delay resolving getstatic instructions until the 565 // class is intitialized. This is required so that access to the static 566 // field will call the initialization function every time until the class 567 // is completely initialized ala. in 2.17.5 in JVM Specification. 568 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 569 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && 570 !klass->is_initialized()); 571 Bytecodes::Code get_code = (Bytecodes::Code)0; 572 573 if (!uninitialized_static) { 574 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 575 if (is_put || !info.access_flags().is_final()) { 576 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 577 } 578 } 579 580 cache_entry(thread)->set_field( 581 get_code, 582 put_code, 583 info.field_holder(), 584 info.index(), 585 info.offset(), 586 state, 587 info.access_flags().is_final(), 588 info.access_flags().is_volatile(), 589 pool->pool_holder() 590 ); 591 IRT_END 592 593 594 //------------------------------------------------------------------------------------------------------------------------ 595 // Synchronization 596 // 597 // The interpreter's synchronization code is factored out so that it can 598 // be shared by method invocation and synchronized blocks. 599 //%note synchronization_3 600 601 //%note monitor_1 602 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 603 #ifdef ASSERT 604 thread->last_frame().interpreter_frame_verify_monitor(elem); 605 #endif 606 if (PrintBiasedLockingStatistics) { 607 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 608 } 609 Handle h_obj(thread, elem->obj()); 610 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 611 "must be NULL or an object"); 612 if (UseBiasedLocking) { 613 // Retry fast entry if bias is revoked to avoid unnecessary inflation 614 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 615 } else { 616 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 617 } 618 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 619 "must be NULL or an object"); 620 #ifdef ASSERT 621 thread->last_frame().interpreter_frame_verify_monitor(elem); 622 #endif 623 IRT_END 624 625 626 //%note monitor_1 627 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 628 #ifdef ASSERT 629 thread->last_frame().interpreter_frame_verify_monitor(elem); 630 #endif 631 Handle h_obj(thread, elem->obj()); 632 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 633 "must be NULL or an object"); 634 if (elem == NULL || h_obj()->is_unlocked()) { 635 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 636 } 637 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 638 // Free entry. This must be done here, since a pending exception might be installed on 639 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 640 elem->set_obj(NULL); 641 #ifdef ASSERT 642 thread->last_frame().interpreter_frame_verify_monitor(elem); 643 #endif 644 IRT_END 645 646 647 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 648 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 649 IRT_END 650 651 652 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 653 // Returns an illegal exception to install into the current thread. The 654 // pending_exception flag is cleared so normal exception handling does not 655 // trigger. Any current installed exception will be overwritten. This 656 // method will be called during an exception unwind. 657 658 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 659 Handle exception(thread, thread->vm_result()); 660 assert(exception() != NULL, "vm result should be set"); 661 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 662 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 663 exception = get_preinitialized_exception( 664 SystemDictionary::IllegalMonitorStateException_klass(), 665 CATCH); 666 } 667 thread->set_vm_result(exception()); 668 IRT_END 669 670 671 //------------------------------------------------------------------------------------------------------------------------ 672 // Invokes 673 674 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 675 return method->orig_bytecode_at(method->bci_from(bcp)); 676 IRT_END 677 678 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 679 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 680 IRT_END 681 682 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 683 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 684 IRT_END 685 686 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { 687 // extract receiver from the outgoing argument list if necessary 688 Handle receiver(thread, NULL); 689 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 690 ResourceMark rm(thread); 691 methodHandle m (thread, method(thread)); 692 Bytecode_invoke call(m, bci(thread)); 693 Symbol* signature = call.signature(); 694 receiver = Handle(thread, 695 thread->last_frame().interpreter_callee_receiver(signature)); 696 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 697 "sanity check"); 698 assert(receiver.is_null() || 699 !Universe::heap()->is_in_reserved(receiver->klass()), 700 "sanity check"); 701 } 702 703 // resolve method 704 CallInfo info; 705 constantPoolHandle pool(thread, method(thread)->constants()); 706 707 { 708 JvmtiHideSingleStepping jhss(thread); 709 LinkResolver::resolve_invoke(info, receiver, pool, 710 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 711 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 712 int retry_count = 0; 713 while (info.resolved_method()->is_old()) { 714 // It is very unlikely that method is redefined more than 100 times 715 // in the middle of resolve. If it is looping here more than 100 times 716 // means then there could be a bug here. 717 guarantee((retry_count++ < 100), 718 "Could not resolve to latest version of redefined method"); 719 // method is redefined in the middle of resolve so re-try. 720 LinkResolver::resolve_invoke(info, receiver, pool, 721 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 722 } 723 } 724 } // end JvmtiHideSingleStepping 725 726 // check if link resolution caused cpCache to be updated 727 if (already_resolved(thread)) return; 728 729 if (bytecode == Bytecodes::_invokeinterface) { 730 if (TraceItables && Verbose) { 731 ResourceMark rm(thread); 732 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); 733 } 734 } 735 #ifdef ASSERT 736 if (bytecode == Bytecodes::_invokeinterface) { 737 if (info.resolved_method()->method_holder() == 738 SystemDictionary::Object_klass()) { 739 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 740 // (see also CallInfo::set_interface for details) 741 assert(info.call_kind() == CallInfo::vtable_call || 742 info.call_kind() == CallInfo::direct_call, ""); 743 methodHandle rm = info.resolved_method(); 744 assert(rm->is_final() || info.has_vtable_index(), 745 "should have been set already"); 746 } else if (!info.resolved_method()->has_itable_index()) { 747 // Resolved something like CharSequence.toString. Use vtable not itable. 748 assert(info.call_kind() != CallInfo::itable_call, ""); 749 } else { 750 // Setup itable entry 751 assert(info.call_kind() == CallInfo::itable_call, ""); 752 int index = info.resolved_method()->itable_index(); 753 assert(info.itable_index() == index, ""); 754 } 755 } else { 756 assert(info.call_kind() == CallInfo::direct_call || 757 info.call_kind() == CallInfo::vtable_call, ""); 758 } 759 #endif 760 switch (info.call_kind()) { 761 case CallInfo::direct_call: 762 cache_entry(thread)->set_direct_call( 763 bytecode, 764 info.resolved_method()); 765 break; 766 case CallInfo::vtable_call: 767 cache_entry(thread)->set_vtable_call( 768 bytecode, 769 info.resolved_method(), 770 info.vtable_index()); 771 break; 772 case CallInfo::itable_call: 773 cache_entry(thread)->set_itable_call( 774 bytecode, 775 info.resolved_method(), 776 info.itable_index()); 777 break; 778 default: ShouldNotReachHere(); 779 } 780 } 781 IRT_END 782 783 784 // First time execution: Resolve symbols, create a permanent MethodType object. 785 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { 786 assert(EnableInvokeDynamic, ""); 787 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 788 789 // resolve method 790 CallInfo info; 791 constantPoolHandle pool(thread, method(thread)->constants()); 792 793 { 794 JvmtiHideSingleStepping jhss(thread); 795 LinkResolver::resolve_invoke(info, Handle(), pool, 796 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); 797 } // end JvmtiHideSingleStepping 798 799 cache_entry(thread)->set_method_handle(pool, info); 800 } 801 IRT_END 802 803 804 // First time execution: Resolve symbols, create a permanent CallSite object. 805 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { 806 assert(EnableInvokeDynamic, ""); 807 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 808 809 //TO DO: consider passing BCI to Java. 810 // int caller_bci = method(thread)->bci_from(bcp(thread)); 811 812 // resolve method 813 CallInfo info; 814 constantPoolHandle pool(thread, method(thread)->constants()); 815 int index = get_index_u4(thread, bytecode); 816 { 817 JvmtiHideSingleStepping jhss(thread); 818 LinkResolver::resolve_invoke(info, Handle(), pool, 819 index, bytecode, CHECK); 820 } // end JvmtiHideSingleStepping 821 822 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 823 cp_cache_entry->set_dynamic_call(pool, info); 824 } 825 IRT_END 826 827 828 //------------------------------------------------------------------------------------------------------------------------ 829 // Miscellaneous 830 831 832 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 833 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 834 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 835 if (branch_bcp != NULL && nm != NULL) { 836 // This was a successful request for an OSR nmethod. Because 837 // frequency_counter_overflow_inner ends with a safepoint check, 838 // nm could have been unloaded so look it up again. It's unsafe 839 // to examine nm directly since it might have been freed and used 840 // for something else. 841 frame fr = thread->last_frame(); 842 Method* method = fr.interpreter_frame_method(); 843 int bci = method->bci_from(fr.interpreter_frame_bcp()); 844 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 845 } 846 #ifndef PRODUCT 847 if (TraceOnStackReplacement) { 848 if (nm != NULL) { 849 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); 850 nm->print(); 851 } 852 } 853 #endif 854 return nm; 855 } 856 857 IRT_ENTRY(nmethod*, 858 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 859 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 860 // flag, in case this method triggers classloading which will call into Java. 861 UnlockFlagSaver fs(thread); 862 863 frame fr = thread->last_frame(); 864 assert(fr.is_interpreted_frame(), "must come from interpreter"); 865 methodHandle method(thread, fr.interpreter_frame_method()); 866 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 867 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 868 869 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 870 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 871 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 872 873 if (osr_nm != NULL) { 874 // We may need to do on-stack replacement which requires that no 875 // monitors in the activation are biased because their 876 // BasicObjectLocks will need to migrate during OSR. Force 877 // unbiasing of all monitors in the activation now (even though 878 // the OSR nmethod might be invalidated) because we don't have a 879 // safepoint opportunity later once the migration begins. 880 if (UseBiasedLocking) { 881 ResourceMark rm; 882 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 883 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 884 kptr < fr.interpreter_frame_monitor_begin(); 885 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 886 if( kptr->obj() != NULL ) { 887 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 888 } 889 } 890 BiasedLocking::revoke(objects_to_revoke); 891 } 892 } 893 return osr_nm; 894 IRT_END 895 896 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 897 assert(ProfileInterpreter, "must be profiling interpreter"); 898 int bci = method->bci_from(cur_bcp); 899 MethodData* mdo = method->method_data(); 900 if (mdo == NULL) return 0; 901 return mdo->bci_to_di(bci); 902 IRT_END 903 904 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 905 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 906 // flag, in case this method triggers classloading which will call into Java. 907 UnlockFlagSaver fs(thread); 908 909 assert(ProfileInterpreter, "must be profiling interpreter"); 910 frame fr = thread->last_frame(); 911 assert(fr.is_interpreted_frame(), "must come from interpreter"); 912 methodHandle method(thread, fr.interpreter_frame_method()); 913 Method::build_interpreter_method_data(method, THREAD); 914 if (HAS_PENDING_EXCEPTION) { 915 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 916 CLEAR_PENDING_EXCEPTION; 917 // and fall through... 918 } 919 IRT_END 920 921 922 #ifdef ASSERT 923 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 924 assert(ProfileInterpreter, "must be profiling interpreter"); 925 926 MethodData* mdo = method->method_data(); 927 assert(mdo != NULL, "must not be null"); 928 929 int bci = method->bci_from(bcp); 930 931 address mdp2 = mdo->bci_to_dp(bci); 932 if (mdp != mdp2) { 933 ResourceMark rm; 934 ResetNoHandleMark rnm; // In a LEAF entry. 935 HandleMark hm; 936 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 937 int current_di = mdo->dp_to_di(mdp); 938 int expected_di = mdo->dp_to_di(mdp2); 939 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 940 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 941 int approx_bci = -1; 942 if (current_di >= 0) { 943 approx_bci = mdo->data_at(current_di)->bci(); 944 } 945 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 946 mdo->print_on(tty); 947 method->print_codes(); 948 } 949 assert(mdp == mdp2, "wrong mdp"); 950 IRT_END 951 #endif // ASSERT 952 953 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 954 assert(ProfileInterpreter, "must be profiling interpreter"); 955 ResourceMark rm(thread); 956 HandleMark hm(thread); 957 frame fr = thread->last_frame(); 958 assert(fr.is_interpreted_frame(), "must come from interpreter"); 959 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 960 961 // Grab a lock to ensure atomic access to setting the return bci and 962 // the displacement. This can block and GC, invalidating all naked oops. 963 MutexLocker ml(RetData_lock); 964 965 // ProfileData is essentially a wrapper around a derived oop, so we 966 // need to take the lock before making any ProfileData structures. 967 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 968 RetData* rdata = data->as_RetData(); 969 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 970 fr.interpreter_frame_set_mdp(new_mdp); 971 IRT_END 972 973 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 974 MethodCounters* mcs = Method::build_method_counters(m, thread); 975 if (HAS_PENDING_EXCEPTION) { 976 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 977 CLEAR_PENDING_EXCEPTION; 978 } 979 return mcs; 980 IRT_END 981 982 983 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 984 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 985 // stack traversal automatically takes care of preserving arguments for invoke, so 986 // this is no longer needed. 987 988 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 989 // if this is called during a safepoint 990 991 if (JvmtiExport::should_post_single_step()) { 992 // We are called during regular safepoints and when the VM is 993 // single stepping. If any thread is marked for single stepping, 994 // then we may have JVMTI work to do. 995 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 996 } 997 IRT_END 998 999 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1000 ConstantPoolCacheEntry *cp_entry)) 1001 1002 // check the access_flags for the field in the klass 1003 1004 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1005 int index = cp_entry->field_index(); 1006 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1007 1008 switch(cp_entry->flag_state()) { 1009 case btos: // fall through 1010 case ctos: // fall through 1011 case stos: // fall through 1012 case itos: // fall through 1013 case ftos: // fall through 1014 case ltos: // fall through 1015 case dtos: // fall through 1016 case atos: break; 1017 default: ShouldNotReachHere(); return; 1018 } 1019 bool is_static = (obj == NULL); 1020 HandleMark hm(thread); 1021 1022 Handle h_obj; 1023 if (!is_static) { 1024 // non-static field accessors have an object, but we need a handle 1025 h_obj = Handle(thread, obj); 1026 } 1027 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1028 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1029 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1030 IRT_END 1031 1032 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1033 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1034 1035 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1036 1037 // check the access_flags for the field in the klass 1038 InstanceKlass* ik = InstanceKlass::cast(k); 1039 int index = cp_entry->field_index(); 1040 // bail out if field modifications are not watched 1041 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1042 1043 char sig_type = '\0'; 1044 1045 switch(cp_entry->flag_state()) { 1046 case btos: sig_type = 'Z'; break; 1047 case ctos: sig_type = 'C'; break; 1048 case stos: sig_type = 'S'; break; 1049 case itos: sig_type = 'I'; break; 1050 case ftos: sig_type = 'F'; break; 1051 case atos: sig_type = 'L'; break; 1052 case ltos: sig_type = 'J'; break; 1053 case dtos: sig_type = 'D'; break; 1054 default: ShouldNotReachHere(); return; 1055 } 1056 bool is_static = (obj == NULL); 1057 1058 HandleMark hm(thread); 1059 instanceKlassHandle h_klass(thread, k); 1060 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1061 jvalue fvalue; 1062 #ifdef _LP64 1063 fvalue = *value; 1064 #else 1065 // Long/double values are stored unaligned and also noncontiguously with 1066 // tagged stacks. We can't just do a simple assignment even in the non- 1067 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1068 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1069 // We assume that the two halves of longs/doubles are stored in interpreter 1070 // stack slots in platform-endian order. 1071 jlong_accessor u; 1072 jint* newval = (jint*)value; 1073 u.words[0] = newval[0]; 1074 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1075 fvalue.j = u.long_value; 1076 #endif // _LP64 1077 1078 Handle h_obj; 1079 if (!is_static) { 1080 // non-static field accessors have an object, but we need a handle 1081 h_obj = Handle(thread, obj); 1082 } 1083 1084 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1085 fid, sig_type, &fvalue); 1086 IRT_END 1087 1088 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1089 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1090 IRT_END 1091 1092 1093 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1094 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1095 IRT_END 1096 1097 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1098 { 1099 return (Interpreter::contains(pc) ? 1 : 0); 1100 } 1101 IRT_END 1102 1103 1104 // Implementation of SignatureHandlerLibrary 1105 1106 address SignatureHandlerLibrary::set_handler_blob() { 1107 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1108 if (handler_blob == NULL) { 1109 return NULL; 1110 } 1111 address handler = handler_blob->code_begin(); 1112 _handler_blob = handler_blob; 1113 _handler = handler; 1114 return handler; 1115 } 1116 1117 void SignatureHandlerLibrary::initialize() { 1118 if (_fingerprints != NULL) { 1119 return; 1120 } 1121 if (set_handler_blob() == NULL) { 1122 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1123 } 1124 1125 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1126 SignatureHandlerLibrary::buffer_size); 1127 _buffer = bb->code_begin(); 1128 1129 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1130 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1131 } 1132 1133 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1134 address handler = _handler; 1135 int insts_size = buffer->pure_insts_size(); 1136 if (handler + insts_size > _handler_blob->code_end()) { 1137 // get a new handler blob 1138 handler = set_handler_blob(); 1139 } 1140 if (handler != NULL) { 1141 memcpy(handler, buffer->insts_begin(), insts_size); 1142 pd_set_handler(handler); 1143 ICache::invalidate_range(handler, insts_size); 1144 _handler = handler + insts_size; 1145 } 1146 return handler; 1147 } 1148 1149 void SignatureHandlerLibrary::add(methodHandle method) { 1150 if (method->signature_handler() == NULL) { 1151 // use slow signature handler if we can't do better 1152 int handler_index = -1; 1153 // check if we can use customized (fast) signature handler 1154 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1155 // use customized signature handler 1156 MutexLocker mu(SignatureHandlerLibrary_lock); 1157 // make sure data structure is initialized 1158 initialize(); 1159 // lookup method signature's fingerprint 1160 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1161 handler_index = _fingerprints->find(fingerprint); 1162 // create handler if necessary 1163 if (handler_index < 0) { 1164 ResourceMark rm; 1165 ptrdiff_t align_offset = (address) 1166 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1167 CodeBuffer buffer((address)(_buffer + align_offset), 1168 SignatureHandlerLibrary::buffer_size - align_offset); 1169 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1170 // copy into code heap 1171 address handler = set_handler(&buffer); 1172 if (handler == NULL) { 1173 // use slow signature handler 1174 } else { 1175 // debugging suppport 1176 if (PrintSignatureHandlers) { 1177 tty->cr(); 1178 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1179 _handlers->length(), 1180 (method->is_static() ? "static" : "receiver"), 1181 method->name_and_sig_as_C_string(), 1182 fingerprint, 1183 buffer.insts_size()); 1184 Disassembler::decode(handler, handler + buffer.insts_size()); 1185 #ifndef PRODUCT 1186 tty->print_cr(" --- associated result handler ---"); 1187 address rh_begin = Interpreter::result_handler(method()->result_type()); 1188 address rh_end = rh_begin; 1189 while (*(int*)rh_end != 0) { 1190 rh_end += sizeof(int); 1191 } 1192 Disassembler::decode(rh_begin, rh_end); 1193 #endif 1194 } 1195 // add handler to library 1196 _fingerprints->append(fingerprint); 1197 _handlers->append(handler); 1198 // set handler index 1199 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1200 handler_index = _fingerprints->length() - 1; 1201 } 1202 } 1203 // Set handler under SignatureHandlerLibrary_lock 1204 if (handler_index < 0) { 1205 // use generic signature handler 1206 method->set_signature_handler(Interpreter::slow_signature_handler()); 1207 } else { 1208 // set handler 1209 method->set_signature_handler(_handlers->at(handler_index)); 1210 } 1211 } else { 1212 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1213 // use generic signature handler 1214 method->set_signature_handler(Interpreter::slow_signature_handler()); 1215 } 1216 } 1217 #ifdef ASSERT 1218 int handler_index = -1; 1219 int fingerprint_index = -2; 1220 { 1221 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1222 // in any way if accessed from multiple threads. To avoid races with another 1223 // thread which may change the arrays in the above, mutex protected block, we 1224 // have to protect this read access here with the same mutex as well! 1225 MutexLocker mu(SignatureHandlerLibrary_lock); 1226 if (_handlers != NULL) { 1227 handler_index = _handlers->find(method->signature_handler()); 1228 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); 1229 } 1230 } 1231 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1232 handler_index == fingerprint_index, "sanity check"); 1233 #endif // ASSERT 1234 } 1235 1236 1237 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1238 address SignatureHandlerLibrary::_handler = NULL; 1239 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1240 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1241 address SignatureHandlerLibrary::_buffer = NULL; 1242 1243 1244 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1245 methodHandle m(thread, method); 1246 assert(m->is_native(), "sanity check"); 1247 // lookup native function entry point if it doesn't exist 1248 bool in_base_library; 1249 if (!m->has_native_function()) { 1250 NativeLookup::lookup(m, in_base_library, CHECK); 1251 } 1252 // make sure signature handler is installed 1253 SignatureHandlerLibrary::add(m); 1254 // The interpreter entry point checks the signature handler first, 1255 // before trying to fetch the native entry point and klass mirror. 1256 // We must set the signature handler last, so that multiple processors 1257 // preparing the same method will be sure to see non-null entry & mirror. 1258 IRT_END 1259 1260 #if defined(IA32) || defined(AMD64) || defined(ARM) 1261 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1262 if (src_address == dest_address) { 1263 return; 1264 } 1265 ResetNoHandleMark rnm; // In a LEAF entry. 1266 HandleMark hm; 1267 ResourceMark rm; 1268 frame fr = thread->last_frame(); 1269 assert(fr.is_interpreted_frame(), ""); 1270 jint bci = fr.interpreter_frame_bci(); 1271 methodHandle mh(thread, fr.interpreter_frame_method()); 1272 Bytecode_invoke invoke(mh, bci); 1273 ArgumentSizeComputer asc(invoke.signature()); 1274 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1275 Copy::conjoint_jbytes(src_address, dest_address, 1276 size_of_arguments * Interpreter::stackElementSize); 1277 IRT_END 1278 #endif 1279 1280 #if INCLUDE_JVMTI 1281 // This is a support of the JVMTI PopFrame interface. 1282 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1283 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1284 // The member_name argument is a saved reference (in local#0) to the member_name. 1285 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1286 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1287 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1288 Method* method, address bcp)) 1289 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1290 if (code != Bytecodes::_invokestatic) { 1291 return; 1292 } 1293 ConstantPool* cpool = method->constants(); 1294 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1295 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1296 Symbol* mname = cpool->name_ref_at(cp_index); 1297 1298 if (MethodHandles::has_member_arg(cname, mname)) { 1299 oop member_name_oop = (oop) member_name; 1300 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1301 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1302 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1303 } 1304 thread->set_vm_result(member_name_oop); 1305 } 1306 IRT_END 1307 #endif // INCLUDE_JVMTI