interpreterRuntime.cpp revision 11959:fbb492c97959
1/* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/javaClasses.inline.hpp" 27#include "classfile/systemDictionary.hpp" 28#include "classfile/vmSymbols.hpp" 29#include "code/codeCache.hpp" 30#include "code/codeCacheExtensions.hpp" 31#include "compiler/compileBroker.hpp" 32#include "compiler/disassembler.hpp" 33#include "gc/shared/collectedHeap.hpp" 34#include "interpreter/interpreter.hpp" 35#include "interpreter/interpreterRuntime.hpp" 36#include "interpreter/linkResolver.hpp" 37#include "interpreter/templateTable.hpp" 38#include "logging/log.hpp" 39#include "memory/oopFactory.hpp" 40#include "memory/resourceArea.hpp" 41#include "memory/universe.inline.hpp" 42#include "oops/constantPool.hpp" 43#include "oops/instanceKlass.hpp" 44#include "oops/methodData.hpp" 45#include "oops/objArrayKlass.hpp" 46#include "oops/objArrayOop.inline.hpp" 47#include "oops/oop.inline.hpp" 48#include "oops/symbol.hpp" 49#include "prims/jvmtiExport.hpp" 50#include "prims/nativeLookup.hpp" 51#include "runtime/atomic.hpp" 52#include "runtime/biasedLocking.hpp" 53#include "runtime/compilationPolicy.hpp" 54#include "runtime/deoptimization.hpp" 55#include "runtime/fieldDescriptor.hpp" 56#include "runtime/handles.inline.hpp" 57#include "runtime/icache.hpp" 58#include "runtime/interfaceSupport.hpp" 59#include "runtime/java.hpp" 60#include "runtime/jfieldIDWorkaround.hpp" 61#include "runtime/osThread.hpp" 62#include "runtime/sharedRuntime.hpp" 63#include "runtime/stubRoutines.hpp" 64#include "runtime/synchronizer.hpp" 65#include "runtime/threadCritical.hpp" 66#include "utilities/events.hpp" 67#ifdef COMPILER2 68#include "opto/runtime.hpp" 69#endif 70 71class UnlockFlagSaver { 72 private: 73 JavaThread* _thread; 74 bool _do_not_unlock; 75 public: 76 UnlockFlagSaver(JavaThread* t) { 77 _thread = t; 78 _do_not_unlock = t->do_not_unlock_if_synchronized(); 79 t->set_do_not_unlock_if_synchronized(false); 80 } 81 ~UnlockFlagSaver() { 82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 83 } 84}; 85 86//------------------------------------------------------------------------------------------------------------------------ 87// State accessors 88 89void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 90 last_frame(thread).interpreter_frame_set_bcp(bcp); 91 if (ProfileInterpreter) { 92 // ProfileTraps uses MDOs independently of ProfileInterpreter. 93 // That is why we must check both ProfileInterpreter and mdo != NULL. 94 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); 95 if (mdo != NULL) { 96 NEEDS_CLEANUP; 97 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); 98 } 99 } 100} 101 102//------------------------------------------------------------------------------------------------------------------------ 103// Constants 104 105 106IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 107 // access constant pool 108 ConstantPool* pool = method(thread)->constants(); 109 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); 110 constantTag tag = pool->tag_at(index); 111 112 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 113 Klass* klass = pool->klass_at(index, CHECK); 114 oop java_class = klass->java_mirror(); 115 thread->set_vm_result(java_class); 116IRT_END 117 118IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 119 assert(bytecode == Bytecodes::_fast_aldc || 120 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 121 ResourceMark rm(thread); 122 methodHandle m (thread, method(thread)); 123 Bytecode_loadconstant ldc(m, bci(thread)); 124 oop result = ldc.resolve_constant(CHECK); 125#ifdef ASSERT 126 { 127 // The bytecode wrappers aren't GC-safe so construct a new one 128 Bytecode_loadconstant ldc2(m, bci(thread)); 129 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); 130 assert(result == coop, "expected result for assembly code"); 131 } 132#endif 133 thread->set_vm_result(result); 134} 135IRT_END 136 137 138//------------------------------------------------------------------------------------------------------------------------ 139// Allocation 140 141IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 142 Klass* k_oop = pool->klass_at(index, CHECK); 143 instanceKlassHandle klass (THREAD, k_oop); 144 145 // Make sure we are not instantiating an abstract klass 146 klass->check_valid_for_instantiation(true, CHECK); 147 148 // Make sure klass is initialized 149 klass->initialize(CHECK); 150 151 // At this point the class may not be fully initialized 152 // because of recursive initialization. If it is fully 153 // initialized & has_finalized is not set, we rewrite 154 // it into its fast version (Note: no locking is needed 155 // here since this is an atomic byte write and can be 156 // done more than once). 157 // 158 // Note: In case of classes with has_finalized we don't 159 // rewrite since that saves us an extra check in 160 // the fast version which then would call the 161 // slow version anyway (and do a call back into 162 // Java). 163 // If we have a breakpoint, then we don't rewrite 164 // because the _breakpoint bytecode would be lost. 165 oop obj = klass->allocate_instance(CHECK); 166 thread->set_vm_result(obj); 167IRT_END 168 169 170IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 171 oop obj = oopFactory::new_typeArray(type, size, CHECK); 172 thread->set_vm_result(obj); 173IRT_END 174 175 176IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 177 Klass* klass = pool->klass_at(index, CHECK); 178 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); 179 thread->set_vm_result(obj); 180IRT_END 181 182 183IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 184 // We may want to pass in more arguments - could make this slightly faster 185 ConstantPool* constants = method(thread)->constants(); 186 int i = get_index_u2(thread, Bytecodes::_multianewarray); 187 Klass* klass = constants->klass_at(i, CHECK); 188 int nof_dims = number_of_dimensions(thread); 189 assert(klass->is_klass(), "not a class"); 190 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 191 192 // We must create an array of jints to pass to multi_allocate. 193 ResourceMark rm(thread); 194 const int small_dims = 10; 195 jint dim_array[small_dims]; 196 jint *dims = &dim_array[0]; 197 if (nof_dims > small_dims) { 198 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 199 } 200 for (int index = 0; index < nof_dims; index++) { 201 // offset from first_size_address is addressed as local[index] 202 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 203 dims[index] = first_size_address[n]; 204 } 205 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 206 thread->set_vm_result(obj); 207IRT_END 208 209 210IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 211 assert(obj->is_oop(), "must be a valid oop"); 212 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 213 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 214IRT_END 215 216 217// Quicken instance-of and check-cast bytecodes 218IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 219 // Force resolving; quicken the bytecode 220 int which = get_index_u2(thread, Bytecodes::_checkcast); 221 ConstantPool* cpool = method(thread)->constants(); 222 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 223 // program we might have seen an unquick'd bytecode in the interpreter but have another 224 // thread quicken the bytecode before we get here. 225 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 226 Klass* klass = cpool->klass_at(which, CHECK); 227 thread->set_vm_result_2(klass); 228IRT_END 229 230 231//------------------------------------------------------------------------------------------------------------------------ 232// Exceptions 233 234void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 235 methodHandle trap_method, int trap_bci, TRAPS) { 236 if (trap_method.not_null()) { 237 MethodData* trap_mdo = trap_method->method_data(); 238 if (trap_mdo == NULL) { 239 Method::build_interpreter_method_data(trap_method, THREAD); 240 if (HAS_PENDING_EXCEPTION) { 241 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 242 "we expect only an OOM error here"); 243 CLEAR_PENDING_EXCEPTION; 244 } 245 trap_mdo = trap_method->method_data(); 246 // and fall through... 247 } 248 if (trap_mdo != NULL) { 249 // Update per-method count of trap events. The interpreter 250 // is updating the MDO to simulate the effect of compiler traps. 251 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 252 } 253 } 254} 255 256// Assume the compiler is (or will be) interested in this event. 257// If necessary, create an MDO to hold the information, and record it. 258void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 259 assert(ProfileTraps, "call me only if profiling"); 260 methodHandle trap_method(thread, method(thread)); 261 int trap_bci = trap_method->bci_from(bcp(thread)); 262 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 263} 264 265#ifdef CC_INTERP 266// As legacy note_trap, but we have more arguments. 267IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 268 methodHandle trap_method(method); 269 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 270IRT_END 271 272// Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 273// for each exception. 274void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 275 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 276void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 277 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 278void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 279 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 280void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 282void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 283 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 284#endif // CC_INTERP 285 286 287static Handle get_preinitialized_exception(Klass* k, TRAPS) { 288 // get klass 289 InstanceKlass* klass = InstanceKlass::cast(k); 290 assert(klass->is_initialized(), 291 "this klass should have been initialized during VM initialization"); 292 // create instance - do not call constructor since we may have no 293 // (java) stack space left (should assert constructor is empty) 294 Handle exception; 295 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 296 exception = Handle(THREAD, exception_oop); 297 if (StackTraceInThrowable) { 298 java_lang_Throwable::fill_in_stack_trace(exception); 299 } 300 return exception; 301} 302 303// Special handling for stack overflow: since we don't have any (java) stack 304// space left we use the pre-allocated & pre-initialized StackOverflowError 305// klass to create an stack overflow error instance. We do not call its 306// constructor for the same reason (it is empty, anyway). 307IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 308 Handle exception = get_preinitialized_exception( 309 SystemDictionary::StackOverflowError_klass(), 310 CHECK); 311 // Increment counter for hs_err file reporting 312 Atomic::inc(&Exceptions::_stack_overflow_errors); 313 THROW_HANDLE(exception); 314IRT_END 315 316IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread)) 317 Handle exception = get_preinitialized_exception( 318 SystemDictionary::StackOverflowError_klass(), 319 CHECK); 320 java_lang_Throwable::set_message(exception(), 321 Universe::delayed_stack_overflow_error_message()); 322 // Increment counter for hs_err file reporting 323 Atomic::inc(&Exceptions::_stack_overflow_errors); 324 THROW_HANDLE(exception); 325IRT_END 326 327IRT_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()); 340IRT_END 341 342 343IRT_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()); 354IRT_END 355 356 357IRT_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); 367IRT_END 368 369IRT_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()); 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); 382IRT_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). 392IRT_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 (log_is_enabled(Info, exceptions)) { 448 ResourceMark rm(thread); 449 stringStream tempst; 450 tempst.print("interpreter method <%s>\n" 451 " at bci %d for thread " INTPTR_FORMAT, 452 h_method->print_value_string(), current_bci, p2i(thread)); 453 Exceptions::log_exception(h_exception, tempst); 454 } 455// Don't go paging in something which won't be used. 456// else if (extable->length() == 0) { 457// // disabled for now - interpreter is not using shortcut yet 458// // (shortcut is not to call runtime if we have no exception handlers) 459// // warning("performance bug: should not call runtime if method has no exception handlers"); 460// } 461 // for AbortVMOnException flag 462 Exceptions::debug_check_abort(h_exception); 463 464 // exception handler lookup 465 KlassHandle h_klass(THREAD, h_exception->klass()); 466 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); 467 if (HAS_PENDING_EXCEPTION) { 468 // We threw an exception while trying to find the exception handler. 469 // Transfer the new exception to the exception handle which will 470 // be set into thread local storage, and do another lookup for an 471 // exception handler for this exception, this time starting at the 472 // BCI of the exception handler which caused the exception to be 473 // thrown (bug 4307310). 474 h_exception = Handle(THREAD, PENDING_EXCEPTION); 475 CLEAR_PENDING_EXCEPTION; 476 if (handler_bci >= 0) { 477 current_bci = handler_bci; 478 should_repeat = true; 479 } 480 } 481 } while (should_repeat == true); 482 483#if INCLUDE_JVMCI 484 if (EnableJVMCI && h_method->method_data() != NULL) { 485 ResourceMark rm(thread); 486 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 487 if (pdata != NULL && pdata->is_BitData()) { 488 BitData* bit_data = (BitData*) pdata; 489 bit_data->set_exception_seen(); 490 } 491 } 492#endif 493 494 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 495 // time throw or a stack unwinding throw and accordingly notify the debugger 496 if (JvmtiExport::can_post_on_exceptions()) { 497 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); 498 } 499 500#ifdef CC_INTERP 501 address continuation = (address)(intptr_t) handler_bci; 502#else 503 address continuation = NULL; 504#endif 505 address handler_pc = NULL; 506 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 507 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 508 // handler in this method, or (b) after a stack overflow there is not yet 509 // enough stack space available to reprotect the stack. 510#ifndef CC_INTERP 511 continuation = Interpreter::remove_activation_entry(); 512#endif 513#if COMPILER2_OR_JVMCI 514 // Count this for compilation purposes 515 h_method->interpreter_throwout_increment(THREAD); 516#endif 517 } else { 518 // handler in this method => change bci/bcp to handler bci/bcp and continue there 519 handler_pc = h_method->code_base() + handler_bci; 520#ifndef CC_INTERP 521 set_bcp_and_mdp(handler_pc, thread); 522 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 523#endif 524 } 525 // notify debugger of an exception catch 526 // (this is good for exceptions caught in native methods as well) 527 if (JvmtiExport::can_post_on_exceptions()) { 528 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 529 } 530 531 thread->set_vm_result(h_exception()); 532 return continuation; 533IRT_END 534 535 536IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 537 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 538 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 539IRT_END 540 541 542IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 543 THROW(vmSymbols::java_lang_AbstractMethodError()); 544IRT_END 545 546 547IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 548 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 549IRT_END 550 551 552//------------------------------------------------------------------------------------------------------------------------ 553// Fields 554// 555 556void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 557 Thread* THREAD = thread; 558 // resolve field 559 fieldDescriptor info; 560 constantPoolHandle pool(thread, method(thread)->constants()); 561 methodHandle m(thread, method(thread)); 562 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 563 bytecode == Bytecodes::_putstatic); 564 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 565 566 { 567 JvmtiHideSingleStepping jhss(thread); 568 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), 569 m, bytecode, CHECK); 570 } // end JvmtiHideSingleStepping 571 572 // check if link resolution caused cpCache to be updated 573 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 574 if (cp_cache_entry->is_resolved(bytecode)) return; 575 576 // compute auxiliary field attributes 577 TosState state = as_TosState(info.field_type()); 578 579 // Resolution of put instructions on final fields is delayed. That is required so that 580 // exceptions are thrown at the correct place (when the instruction is actually invoked). 581 // If we do not resolve an instruction in the current pass, leaving the put_code 582 // set to zero will cause the next put instruction to the same field to reresolve. 583 584 // Resolution of put instructions to final instance fields with invalid updates (i.e., 585 // to final instance fields with updates originating from a method different than <init>) 586 // is inhibited. A putfield instruction targeting an instance final field must throw 587 // an IllegalAccessError if the instruction is not in an instance 588 // initializer method <init>. If resolution were not inhibited, a putfield 589 // in an initializer method could be resolved in the initializer. Subsequent 590 // putfield instructions to the same field would then use cached information. 591 // As a result, those instructions would not pass through the VM. That is, 592 // checks in resolve_field_access() would not be executed for those instructions 593 // and the required IllegalAccessError would not be thrown. 594 // 595 // Also, we need to delay resolving getstatic and putstatic instructions until the 596 // class is initialized. This is required so that access to the static 597 // field will call the initialization function every time until the class 598 // is completely initialized ala. in 2.17.5 in JVM Specification. 599 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); 600 bool uninitialized_static = is_static && !klass->is_initialized(); 601 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 602 info.has_initialized_final_update(); 603 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); 604 605 Bytecodes::Code get_code = (Bytecodes::Code)0; 606 Bytecodes::Code put_code = (Bytecodes::Code)0; 607 if (!uninitialized_static) { 608 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); 609 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 610 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 611 } 612 } 613 614 cp_cache_entry->set_field( 615 get_code, 616 put_code, 617 info.field_holder(), 618 info.index(), 619 info.offset(), 620 state, 621 info.access_flags().is_final(), 622 info.access_flags().is_volatile(), 623 pool->pool_holder() 624 ); 625} 626 627 628//------------------------------------------------------------------------------------------------------------------------ 629// Synchronization 630// 631// The interpreter's synchronization code is factored out so that it can 632// be shared by method invocation and synchronized blocks. 633//%note synchronization_3 634 635//%note monitor_1 636IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 637#ifdef ASSERT 638 thread->last_frame().interpreter_frame_verify_monitor(elem); 639#endif 640 if (PrintBiasedLockingStatistics) { 641 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 642 } 643 Handle h_obj(thread, elem->obj()); 644 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 645 "must be NULL or an object"); 646 if (UseBiasedLocking) { 647 // Retry fast entry if bias is revoked to avoid unnecessary inflation 648 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); 649 } else { 650 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); 651 } 652 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), 653 "must be NULL or an object"); 654#ifdef ASSERT 655 thread->last_frame().interpreter_frame_verify_monitor(elem); 656#endif 657IRT_END 658 659 660//%note monitor_1 661IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 662#ifdef ASSERT 663 thread->last_frame().interpreter_frame_verify_monitor(elem); 664#endif 665 Handle h_obj(thread, elem->obj()); 666 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), 667 "must be NULL or an object"); 668 if (elem == NULL || h_obj()->is_unlocked()) { 669 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 670 } 671 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); 672 // Free entry. This must be done here, since a pending exception might be installed on 673 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 674 elem->set_obj(NULL); 675#ifdef ASSERT 676 thread->last_frame().interpreter_frame_verify_monitor(elem); 677#endif 678IRT_END 679 680 681IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 682 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 683IRT_END 684 685 686IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 687 // Returns an illegal exception to install into the current thread. The 688 // pending_exception flag is cleared so normal exception handling does not 689 // trigger. Any current installed exception will be overwritten. This 690 // method will be called during an exception unwind. 691 692 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 693 Handle exception(thread, thread->vm_result()); 694 assert(exception() != NULL, "vm result should be set"); 695 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 696 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 697 exception = get_preinitialized_exception( 698 SystemDictionary::IllegalMonitorStateException_klass(), 699 CATCH); 700 } 701 thread->set_vm_result(exception()); 702IRT_END 703 704 705//------------------------------------------------------------------------------------------------------------------------ 706// Invokes 707 708IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 709 return method->orig_bytecode_at(method->bci_from(bcp)); 710IRT_END 711 712IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 713 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 714IRT_END 715 716IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 717 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 718IRT_END 719 720void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 721 Thread* THREAD = thread; 722 // extract receiver from the outgoing argument list if necessary 723 Handle receiver(thread, NULL); 724 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { 725 ResourceMark rm(thread); 726 methodHandle m (thread, method(thread)); 727 Bytecode_invoke call(m, bci(thread)); 728 Symbol* signature = call.signature(); 729 receiver = Handle(thread, 730 thread->last_frame().interpreter_callee_receiver(signature)); 731 assert(Universe::heap()->is_in_reserved_or_null(receiver()), 732 "sanity check"); 733 assert(receiver.is_null() || 734 !Universe::heap()->is_in_reserved(receiver->klass()), 735 "sanity check"); 736 } 737 738 // resolve method 739 CallInfo info; 740 constantPoolHandle pool(thread, method(thread)->constants()); 741 742 { 743 JvmtiHideSingleStepping jhss(thread); 744 LinkResolver::resolve_invoke(info, receiver, pool, 745 get_index_u2_cpcache(thread, bytecode), bytecode, 746 CHECK); 747 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 748 int retry_count = 0; 749 while (info.resolved_method()->is_old()) { 750 // It is very unlikely that method is redefined more than 100 times 751 // in the middle of resolve. If it is looping here more than 100 times 752 // means then there could be a bug here. 753 guarantee((retry_count++ < 100), 754 "Could not resolve to latest version of redefined method"); 755 // method is redefined in the middle of resolve so re-try. 756 LinkResolver::resolve_invoke(info, receiver, pool, 757 get_index_u2_cpcache(thread, bytecode), bytecode, 758 CHECK); 759 } 760 } 761 } // end JvmtiHideSingleStepping 762 763 // check if link resolution caused cpCache to be updated 764 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 765 if (cp_cache_entry->is_resolved(bytecode)) return; 766 767#ifdef ASSERT 768 if (bytecode == Bytecodes::_invokeinterface) { 769 if (info.resolved_method()->method_holder() == 770 SystemDictionary::Object_klass()) { 771 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 772 // (see also CallInfo::set_interface for details) 773 assert(info.call_kind() == CallInfo::vtable_call || 774 info.call_kind() == CallInfo::direct_call, ""); 775 methodHandle rm = info.resolved_method(); 776 assert(rm->is_final() || info.has_vtable_index(), 777 "should have been set already"); 778 } else if (!info.resolved_method()->has_itable_index()) { 779 // Resolved something like CharSequence.toString. Use vtable not itable. 780 assert(info.call_kind() != CallInfo::itable_call, ""); 781 } else { 782 // Setup itable entry 783 assert(info.call_kind() == CallInfo::itable_call, ""); 784 int index = info.resolved_method()->itable_index(); 785 assert(info.itable_index() == index, ""); 786 } 787 } else { 788 assert(info.call_kind() == CallInfo::direct_call || 789 info.call_kind() == CallInfo::vtable_call, ""); 790 } 791#endif 792 switch (info.call_kind()) { 793 case CallInfo::direct_call: 794 cp_cache_entry->set_direct_call( 795 bytecode, 796 info.resolved_method()); 797 break; 798 case CallInfo::vtable_call: 799 cp_cache_entry->set_vtable_call( 800 bytecode, 801 info.resolved_method(), 802 info.vtable_index()); 803 break; 804 case CallInfo::itable_call: 805 cp_cache_entry->set_itable_call( 806 bytecode, 807 info.resolved_method(), 808 info.itable_index()); 809 break; 810 default: ShouldNotReachHere(); 811 } 812} 813 814 815// First time execution: Resolve symbols, create a permanent MethodType object. 816void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 817 Thread* THREAD = thread; 818 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 819 820 // resolve method 821 CallInfo info; 822 constantPoolHandle pool(thread, method(thread)->constants()); 823 { 824 JvmtiHideSingleStepping jhss(thread); 825 LinkResolver::resolve_invoke(info, Handle(), pool, 826 get_index_u2_cpcache(thread, bytecode), bytecode, 827 CHECK); 828 } // end JvmtiHideSingleStepping 829 830 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); 831 cp_cache_entry->set_method_handle(pool, info); 832} 833 834// First time execution: Resolve symbols, create a permanent CallSite object. 835void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 836 Thread* THREAD = thread; 837 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 838 839 //TO DO: consider passing BCI to Java. 840 // int caller_bci = method(thread)->bci_from(bcp(thread)); 841 842 // resolve method 843 CallInfo info; 844 constantPoolHandle pool(thread, method(thread)->constants()); 845 int index = get_index_u4(thread, bytecode); 846 { 847 JvmtiHideSingleStepping jhss(thread); 848 LinkResolver::resolve_invoke(info, Handle(), pool, 849 index, bytecode, CHECK); 850 } // end JvmtiHideSingleStepping 851 852 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 853 cp_cache_entry->set_dynamic_call(pool, info); 854} 855 856// This function is the interface to the assembly code. It returns the resolved 857// cpCache entry. This doesn't safepoint, but the helper routines safepoint. 858// This function will check for redefinition! 859IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 860 switch (bytecode) { 861 case Bytecodes::_getstatic: 862 case Bytecodes::_putstatic: 863 case Bytecodes::_getfield: 864 case Bytecodes::_putfield: 865 resolve_get_put(thread, bytecode); 866 break; 867 case Bytecodes::_invokevirtual: 868 case Bytecodes::_invokespecial: 869 case Bytecodes::_invokestatic: 870 case Bytecodes::_invokeinterface: 871 resolve_invoke(thread, bytecode); 872 break; 873 case Bytecodes::_invokehandle: 874 resolve_invokehandle(thread); 875 break; 876 case Bytecodes::_invokedynamic: 877 resolve_invokedynamic(thread); 878 break; 879 default: 880 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 881 break; 882 } 883} 884IRT_END 885 886//------------------------------------------------------------------------------------------------------------------------ 887// Miscellaneous 888 889 890nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 891 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 892 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 893 if (branch_bcp != NULL && nm != NULL) { 894 // This was a successful request for an OSR nmethod. Because 895 // frequency_counter_overflow_inner ends with a safepoint check, 896 // nm could have been unloaded so look it up again. It's unsafe 897 // to examine nm directly since it might have been freed and used 898 // for something else. 899 frame fr = thread->last_frame(); 900 Method* method = fr.interpreter_frame_method(); 901 int bci = method->bci_from(fr.interpreter_frame_bcp()); 902 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 903 } 904#ifndef PRODUCT 905 if (TraceOnStackReplacement) { 906 if (nm != NULL) { 907 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 908 nm->print(); 909 } 910 } 911#endif 912 return nm; 913} 914 915IRT_ENTRY(nmethod*, 916 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 917 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 918 // flag, in case this method triggers classloading which will call into Java. 919 UnlockFlagSaver fs(thread); 920 921 frame fr = thread->last_frame(); 922 assert(fr.is_interpreted_frame(), "must come from interpreter"); 923 methodHandle method(thread, fr.interpreter_frame_method()); 924 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 925 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; 926 927 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 928 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 929 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 930 931 if (osr_nm != NULL) { 932 // We may need to do on-stack replacement which requires that no 933 // monitors in the activation are biased because their 934 // BasicObjectLocks will need to migrate during OSR. Force 935 // unbiasing of all monitors in the activation now (even though 936 // the OSR nmethod might be invalidated) because we don't have a 937 // safepoint opportunity later once the migration begins. 938 if (UseBiasedLocking) { 939 ResourceMark rm; 940 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 941 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); 942 kptr < fr.interpreter_frame_monitor_begin(); 943 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { 944 if( kptr->obj() != NULL ) { 945 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 946 } 947 } 948 BiasedLocking::revoke(objects_to_revoke); 949 } 950 } 951 return osr_nm; 952IRT_END 953 954IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 955 assert(ProfileInterpreter, "must be profiling interpreter"); 956 int bci = method->bci_from(cur_bcp); 957 MethodData* mdo = method->method_data(); 958 if (mdo == NULL) return 0; 959 return mdo->bci_to_di(bci); 960IRT_END 961 962IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 963 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 964 // flag, in case this method triggers classloading which will call into Java. 965 UnlockFlagSaver fs(thread); 966 967 assert(ProfileInterpreter, "must be profiling interpreter"); 968 frame fr = thread->last_frame(); 969 assert(fr.is_interpreted_frame(), "must come from interpreter"); 970 methodHandle method(thread, fr.interpreter_frame_method()); 971 Method::build_interpreter_method_data(method, THREAD); 972 if (HAS_PENDING_EXCEPTION) { 973 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 974 CLEAR_PENDING_EXCEPTION; 975 // and fall through... 976 } 977IRT_END 978 979 980#ifdef ASSERT 981IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 982 assert(ProfileInterpreter, "must be profiling interpreter"); 983 984 MethodData* mdo = method->method_data(); 985 assert(mdo != NULL, "must not be null"); 986 987 int bci = method->bci_from(bcp); 988 989 address mdp2 = mdo->bci_to_dp(bci); 990 if (mdp != mdp2) { 991 ResourceMark rm; 992 ResetNoHandleMark rnm; // In a LEAF entry. 993 HandleMark hm; 994 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 995 int current_di = mdo->dp_to_di(mdp); 996 int expected_di = mdo->dp_to_di(mdp2); 997 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 998 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 999 int approx_bci = -1; 1000 if (current_di >= 0) { 1001 approx_bci = mdo->data_at(current_di)->bci(); 1002 } 1003 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1004 mdo->print_on(tty); 1005 method->print_codes(); 1006 } 1007 assert(mdp == mdp2, "wrong mdp"); 1008IRT_END 1009#endif // ASSERT 1010 1011IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1012 assert(ProfileInterpreter, "must be profiling interpreter"); 1013 ResourceMark rm(thread); 1014 HandleMark hm(thread); 1015 frame fr = thread->last_frame(); 1016 assert(fr.is_interpreted_frame(), "must come from interpreter"); 1017 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); 1018 1019 // Grab a lock to ensure atomic access to setting the return bci and 1020 // the displacement. This can block and GC, invalidating all naked oops. 1021 MutexLocker ml(RetData_lock); 1022 1023 // ProfileData is essentially a wrapper around a derived oop, so we 1024 // need to take the lock before making any ProfileData structures. 1025 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); 1026 RetData* rdata = data->as_RetData(); 1027 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1028 fr.interpreter_frame_set_mdp(new_mdp); 1029IRT_END 1030 1031IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1032 MethodCounters* mcs = Method::build_method_counters(m, thread); 1033 if (HAS_PENDING_EXCEPTION) { 1034 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1035 CLEAR_PENDING_EXCEPTION; 1036 } 1037 return mcs; 1038IRT_END 1039 1040 1041IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1042 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1043 // stack traversal automatically takes care of preserving arguments for invoke, so 1044 // this is no longer needed. 1045 1046 // IRT_END does an implicit safepoint check, hence we are guaranteed to block 1047 // if this is called during a safepoint 1048 1049 if (JvmtiExport::should_post_single_step()) { 1050 // We are called during regular safepoints and when the VM is 1051 // single stepping. If any thread is marked for single stepping, 1052 // then we may have JVMTI work to do. 1053 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); 1054 } 1055IRT_END 1056 1057IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1058ConstantPoolCacheEntry *cp_entry)) 1059 1060 // check the access_flags for the field in the klass 1061 1062 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1063 int index = cp_entry->field_index(); 1064 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1065 1066 bool is_static = (obj == NULL); 1067 HandleMark hm(thread); 1068 1069 Handle h_obj; 1070 if (!is_static) { 1071 // non-static field accessors have an object, but we need a handle 1072 h_obj = Handle(thread, obj); 1073 } 1074 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); 1075 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); 1076 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); 1077IRT_END 1078 1079IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1080 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1081 1082 Klass* k = (Klass*)cp_entry->f1_as_klass(); 1083 1084 // check the access_flags for the field in the klass 1085 InstanceKlass* ik = InstanceKlass::cast(k); 1086 int index = cp_entry->field_index(); 1087 // bail out if field modifications are not watched 1088 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1089 1090 char sig_type = '\0'; 1091 1092 switch(cp_entry->flag_state()) { 1093 case btos: sig_type = 'B'; break; 1094 case ztos: sig_type = 'Z'; break; 1095 case ctos: sig_type = 'C'; break; 1096 case stos: sig_type = 'S'; break; 1097 case itos: sig_type = 'I'; break; 1098 case ftos: sig_type = 'F'; break; 1099 case atos: sig_type = 'L'; break; 1100 case ltos: sig_type = 'J'; break; 1101 case dtos: sig_type = 'D'; break; 1102 default: ShouldNotReachHere(); return; 1103 } 1104 bool is_static = (obj == NULL); 1105 1106 HandleMark hm(thread); 1107 instanceKlassHandle h_klass(thread, k); 1108 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); 1109 jvalue fvalue; 1110#ifdef _LP64 1111 fvalue = *value; 1112#else 1113 // Long/double values are stored unaligned and also noncontiguously with 1114 // tagged stacks. We can't just do a simple assignment even in the non- 1115 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1116 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1117 // We assume that the two halves of longs/doubles are stored in interpreter 1118 // stack slots in platform-endian order. 1119 jlong_accessor u; 1120 jint* newval = (jint*)value; 1121 u.words[0] = newval[0]; 1122 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1123 fvalue.j = u.long_value; 1124#endif // _LP64 1125 1126 Handle h_obj; 1127 if (!is_static) { 1128 // non-static field accessors have an object, but we need a handle 1129 h_obj = Handle(thread, obj); 1130 } 1131 1132 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, 1133 fid, sig_type, &fvalue); 1134IRT_END 1135 1136IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1137 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1138IRT_END 1139 1140 1141IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1142 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); 1143IRT_END 1144 1145IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1146{ 1147 return (Interpreter::contains(pc) ? 1 : 0); 1148} 1149IRT_END 1150 1151 1152// Implementation of SignatureHandlerLibrary 1153 1154#ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1155// Dummy definition (else normalization method is defined in CPU 1156// dependant code) 1157uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1158 return fingerprint; 1159} 1160#endif 1161 1162address SignatureHandlerLibrary::set_handler_blob() { 1163 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1164 if (handler_blob == NULL) { 1165 return NULL; 1166 } 1167 address handler = handler_blob->code_begin(); 1168 _handler_blob = handler_blob; 1169 _handler = handler; 1170 return handler; 1171} 1172 1173void SignatureHandlerLibrary::initialize() { 1174 if (_fingerprints != NULL) { 1175 return; 1176 } 1177 if (set_handler_blob() == NULL) { 1178 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1179 } 1180 1181 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1182 SignatureHandlerLibrary::buffer_size); 1183 _buffer = bb->code_begin(); 1184 1185 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1186 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1187} 1188 1189address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1190 address handler = _handler; 1191 int insts_size = buffer->pure_insts_size(); 1192 if (handler + insts_size > _handler_blob->code_end()) { 1193 // get a new handler blob 1194 handler = set_handler_blob(); 1195 } 1196 if (handler != NULL) { 1197 memcpy(handler, buffer->insts_begin(), insts_size); 1198 pd_set_handler(handler); 1199 ICache::invalidate_range(handler, insts_size); 1200 _handler = handler + insts_size; 1201 } 1202 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler); 1203 return handler; 1204} 1205 1206void SignatureHandlerLibrary::add(const methodHandle& method) { 1207 if (method->signature_handler() == NULL) { 1208 // use slow signature handler if we can't do better 1209 int handler_index = -1; 1210 // check if we can use customized (fast) signature handler 1211 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1212 // use customized signature handler 1213 MutexLocker mu(SignatureHandlerLibrary_lock); 1214 // make sure data structure is initialized 1215 initialize(); 1216 // lookup method signature's fingerprint 1217 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1218 // allow CPU dependant code to optimize the fingerprints for the fast handler 1219 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1220 handler_index = _fingerprints->find(fingerprint); 1221 // create handler if necessary 1222 if (handler_index < 0) { 1223 ResourceMark rm; 1224 ptrdiff_t align_offset = (address) 1225 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; 1226 CodeBuffer buffer((address)(_buffer + align_offset), 1227 SignatureHandlerLibrary::buffer_size - align_offset); 1228 if (!CodeCacheExtensions::support_dynamic_code()) { 1229 // we need a name for the signature (for lookups or saving) 1230 const int SYMBOL_SIZE = 50; 1231 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE); 1232 // support for named signatures 1233 jio_snprintf(symbolName, SYMBOL_SIZE, 1234 "native_" UINT64_FORMAT, fingerprint); 1235 buffer.set_name(symbolName); 1236 } 1237 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1238 // copy into code heap 1239 address handler = set_handler(&buffer); 1240 if (handler == NULL) { 1241 // use slow signature handler (without memorizing it in the fingerprints) 1242 } else { 1243 // debugging suppport 1244 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1245 ttyLocker ttyl; 1246 tty->cr(); 1247 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1248 _handlers->length(), 1249 (method->is_static() ? "static" : "receiver"), 1250 method->name_and_sig_as_C_string(), 1251 fingerprint, 1252 buffer.insts_size()); 1253 if (buffer.insts_size() > 0) { 1254 // buffer may be empty for pregenerated handlers 1255 Disassembler::decode(handler, handler + buffer.insts_size()); 1256 } 1257#ifndef PRODUCT 1258 address rh_begin = Interpreter::result_handler(method()->result_type()); 1259 if (CodeCache::contains(rh_begin)) { 1260 // else it might be special platform dependent values 1261 tty->print_cr(" --- associated result handler ---"); 1262 address rh_end = rh_begin; 1263 while (*(int*)rh_end != 0) { 1264 rh_end += sizeof(int); 1265 } 1266 Disassembler::decode(rh_begin, rh_end); 1267 } else { 1268 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1269 } 1270#endif 1271 } 1272 // add handler to library 1273 _fingerprints->append(fingerprint); 1274 _handlers->append(handler); 1275 // set handler index 1276 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1277 handler_index = _fingerprints->length() - 1; 1278 } 1279 } 1280 // Set handler under SignatureHandlerLibrary_lock 1281 if (handler_index < 0) { 1282 // use generic signature handler 1283 method->set_signature_handler(Interpreter::slow_signature_handler()); 1284 } else { 1285 // set handler 1286 method->set_signature_handler(_handlers->at(handler_index)); 1287 } 1288 } else { 1289 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 1290 // use generic signature handler 1291 method->set_signature_handler(Interpreter::slow_signature_handler()); 1292 } 1293 } 1294#ifdef ASSERT 1295 int handler_index = -1; 1296 int fingerprint_index = -2; 1297 { 1298 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1299 // in any way if accessed from multiple threads. To avoid races with another 1300 // thread which may change the arrays in the above, mutex protected block, we 1301 // have to protect this read access here with the same mutex as well! 1302 MutexLocker mu(SignatureHandlerLibrary_lock); 1303 if (_handlers != NULL) { 1304 handler_index = _handlers->find(method->signature_handler()); 1305 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1306 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1307 fingerprint_index = _fingerprints->find(fingerprint); 1308 } 1309 } 1310 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1311 handler_index == fingerprint_index, "sanity check"); 1312#endif // ASSERT 1313} 1314 1315void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1316 int handler_index = -1; 1317 // use customized signature handler 1318 MutexLocker mu(SignatureHandlerLibrary_lock); 1319 // make sure data structure is initialized 1320 initialize(); 1321 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1322 handler_index = _fingerprints->find(fingerprint); 1323 // create handler if necessary 1324 if (handler_index < 0) { 1325 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1326 tty->cr(); 1327 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1328 _handlers->length(), 1329 p2i(handler), 1330 fingerprint); 1331 } 1332 _fingerprints->append(fingerprint); 1333 _handlers->append(handler); 1334 } else { 1335 if (PrintSignatureHandlers) { 1336 tty->cr(); 1337 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1338 _handlers->length(), 1339 fingerprint, 1340 p2i(_handlers->at(handler_index)), 1341 p2i(handler)); 1342 } 1343 } 1344} 1345 1346 1347BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1348address SignatureHandlerLibrary::_handler = NULL; 1349GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1350GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1351address SignatureHandlerLibrary::_buffer = NULL; 1352 1353 1354IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1355 methodHandle m(thread, method); 1356 assert(m->is_native(), "sanity check"); 1357 // lookup native function entry point if it doesn't exist 1358 bool in_base_library; 1359 if (!m->has_native_function()) { 1360 NativeLookup::lookup(m, in_base_library, CHECK); 1361 } 1362 // make sure signature handler is installed 1363 SignatureHandlerLibrary::add(m); 1364 // The interpreter entry point checks the signature handler first, 1365 // before trying to fetch the native entry point and klass mirror. 1366 // We must set the signature handler last, so that multiple processors 1367 // preparing the same method will be sure to see non-null entry & mirror. 1368IRT_END 1369 1370#if defined(IA32) || defined(AMD64) || defined(ARM) 1371IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1372 if (src_address == dest_address) { 1373 return; 1374 } 1375 ResetNoHandleMark rnm; // In a LEAF entry. 1376 HandleMark hm; 1377 ResourceMark rm; 1378 frame fr = thread->last_frame(); 1379 assert(fr.is_interpreted_frame(), ""); 1380 jint bci = fr.interpreter_frame_bci(); 1381 methodHandle mh(thread, fr.interpreter_frame_method()); 1382 Bytecode_invoke invoke(mh, bci); 1383 ArgumentSizeComputer asc(invoke.signature()); 1384 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1385 Copy::conjoint_jbytes(src_address, dest_address, 1386 size_of_arguments * Interpreter::stackElementSize); 1387IRT_END 1388#endif 1389 1390#if INCLUDE_JVMTI 1391// This is a support of the JVMTI PopFrame interface. 1392// Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1393// and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1394// The member_name argument is a saved reference (in local#0) to the member_name. 1395// For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1396// FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1397IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1398 Method* method, address bcp)) 1399 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1400 if (code != Bytecodes::_invokestatic) { 1401 return; 1402 } 1403 ConstantPool* cpool = method->constants(); 1404 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1405 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1406 Symbol* mname = cpool->name_ref_at(cp_index); 1407 1408 if (MethodHandles::has_member_arg(cname, mname)) { 1409 oop member_name_oop = (oop) member_name; 1410 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1411 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1412 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1413 } 1414 thread->set_vm_result(member_name_oop); 1415 } else { 1416 thread->set_vm_result(NULL); 1417 } 1418IRT_END 1419#endif // INCLUDE_JVMTI 1420 1421#ifndef PRODUCT 1422// This must be a IRT_LEAF function because the interpreter must save registers on x86 to 1423// call this, which changes rsp and makes the interpreter's expression stack not walkable. 1424// The generated code still uses call_VM because that will set up the frame pointer for 1425// bcp and method. 1426IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1427 const frame f = thread->last_frame(); 1428 assert(f.is_interpreted_frame(), "must be an interpreted frame"); 1429 methodHandle mh(thread, f.interpreter_frame_method()); 1430 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); 1431 return preserve_this_value; 1432IRT_END 1433#endif // !PRODUCT 1434