1 /* 2 * Copyright (c) 2012, 2019, 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 #include "precompiled.hpp" 25 #include "classfile/symbolTable.hpp" 26 #include "compiler/compileBroker.hpp" 27 #include "jvmci/jniAccessMark.inline.hpp" 28 #include "jvmci/jvmciCompilerToVM.hpp" 29 #include "jvmci/jvmciRuntime.hpp" 30 #include "logging/log.hpp" 31 #include "memory/oopFactory.hpp" 32 #include "memory/universe.hpp" 33 #include "oops/constantPool.inline.hpp" 34 #include "oops/method.inline.hpp" 35 #include "oops/objArrayKlass.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "runtime/biasedLocking.hpp" 38 #include "runtime/deoptimization.hpp" 39 #include "runtime/fieldDescriptor.inline.hpp" 40 #include "runtime/frame.inline.hpp" 41 #include "runtime/sharedRuntime.hpp" 42 #if INCLUDE_G1GC 43 #include "gc/g1/g1ThreadLocalData.hpp" 44 #endif // INCLUDE_G1GC 45 46 // Simple helper to see if the caller of a runtime stub which 47 // entered the VM has been deoptimized 48 49 static bool caller_is_deopted() { 50 JavaThread* thread = JavaThread::current(); 51 RegisterMap reg_map(thread, false); 52 frame runtime_frame = thread->last_frame(); 53 frame caller_frame = runtime_frame.sender(®_map); 54 assert(caller_frame.is_compiled_frame(), "must be compiled"); 55 return caller_frame.is_deoptimized_frame(); 56 } 57 58 // Stress deoptimization 59 static void deopt_caller() { 60 if ( !caller_is_deopted()) { 61 JavaThread* thread = JavaThread::current(); 62 RegisterMap reg_map(thread, false); 63 frame runtime_frame = thread->last_frame(); 64 frame caller_frame = runtime_frame.sender(®_map); 65 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); 66 assert(caller_is_deopted(), "Must be deoptimized"); 67 } 68 } 69 70 // Manages a scope for a JVMCI runtime call that attempts a heap allocation. 71 // If there is a pending exception upon closing the scope and the runtime 72 // call is of the variety where allocation failure returns NULL without an 73 // exception, the following action is taken: 74 // 1. The pending exception is cleared 75 // 2. NULL is written to JavaThread::_vm_result 76 // 3. Checks that an OutOfMemoryError is Universe::out_of_memory_error_retry(). 77 class RetryableAllocationMark: public StackObj { 78 private: 79 JavaThread* _thread; 80 public: 81 RetryableAllocationMark(JavaThread* thread, bool activate) { 82 if (activate) { 83 assert(!thread->in_retryable_allocation(), "retryable allocation scope is non-reentrant"); 84 _thread = thread; 85 _thread->set_in_retryable_allocation(true); 86 } else { 87 _thread = NULL; 88 } 89 } 90 ~RetryableAllocationMark() { 91 if (_thread != NULL) { 92 _thread->set_in_retryable_allocation(false); 93 JavaThread* THREAD = _thread; 94 if (HAS_PENDING_EXCEPTION) { 95 oop ex = PENDING_EXCEPTION; 96 CLEAR_PENDING_EXCEPTION; 97 oop retry_oome = Universe::out_of_memory_error_retry(); 98 if (ex->is_a(retry_oome->klass()) && retry_oome != ex) { 99 ResourceMark rm; 100 fatal("Unexpected exception in scope of retryable allocation: " INTPTR_FORMAT " of type %s", p2i(ex), ex->klass()->external_name()); 101 } 102 _thread->set_vm_result(NULL); 103 } 104 } 105 } 106 }; 107 108 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance_common(JavaThread* thread, Klass* klass, bool null_on_fail)) 109 JRT_BLOCK; 110 assert(klass->is_klass(), "not a class"); 111 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive 112 InstanceKlass* h = InstanceKlass::cast(klass); 113 { 114 RetryableAllocationMark ram(thread, null_on_fail); 115 h->check_valid_for_instantiation(true, CHECK); 116 oop obj; 117 if (null_on_fail) { 118 if (!h->is_initialized()) { 119 // Cannot re-execute class initialization without side effects 120 // so return without attempting the initialization 121 return; 122 } 123 } else { 124 // make sure klass is initialized 125 h->initialize(CHECK); 126 } 127 // allocate instance and return via TLS 128 obj = h->allocate_instance(CHECK); 129 thread->set_vm_result(obj); 130 } 131 JRT_BLOCK_END; 132 SharedRuntime::on_slowpath_allocation_exit(thread); 133 JRT_END 134 135 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array_common(JavaThread* thread, Klass* array_klass, jint length, bool null_on_fail)) 136 JRT_BLOCK; 137 // Note: no handle for klass needed since they are not used 138 // anymore after new_objArray() and no GC can happen before. 139 // (This may have to change if this code changes!) 140 assert(array_klass->is_klass(), "not a class"); 141 oop obj; 142 if (array_klass->is_typeArray_klass()) { 143 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type(); 144 RetryableAllocationMark ram(thread, null_on_fail); 145 obj = oopFactory::new_typeArray(elt_type, length, CHECK); 146 } else { 147 Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive 148 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass(); 149 RetryableAllocationMark ram(thread, null_on_fail); 150 obj = oopFactory::new_objArray(elem_klass, length, CHECK); 151 } 152 thread->set_vm_result(obj); 153 // This is pretty rare but this runtime patch is stressful to deoptimization 154 // if we deoptimize here so force a deopt to stress the path. 155 if (DeoptimizeALot) { 156 static int deopts = 0; 157 // Alternate between deoptimizing and raising an error (which will also cause a deopt) 158 if (deopts++ % 2 == 0) { 159 if (null_on_fail) { 160 return; 161 } else { 162 ResourceMark rm(THREAD); 163 THROW(vmSymbols::java_lang_OutOfMemoryError()); 164 } 165 } else { 166 deopt_caller(); 167 } 168 } 169 JRT_BLOCK_END; 170 SharedRuntime::on_slowpath_allocation_exit(thread); 171 JRT_END 172 173 JRT_ENTRY(void, JVMCIRuntime::new_multi_array_common(JavaThread* thread, Klass* klass, int rank, jint* dims, bool null_on_fail)) 174 assert(klass->is_klass(), "not a class"); 175 assert(rank >= 1, "rank must be nonzero"); 176 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive 177 RetryableAllocationMark ram(thread, null_on_fail); 178 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK); 179 thread->set_vm_result(obj); 180 JRT_END 181 182 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array_common(JavaThread* thread, oopDesc* element_mirror, jint length, bool null_on_fail)) 183 RetryableAllocationMark ram(thread, null_on_fail); 184 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK); 185 thread->set_vm_result(obj); 186 JRT_END 187 188 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance_common(JavaThread* thread, oopDesc* type_mirror, bool null_on_fail)) 189 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror)); 190 191 if (klass == NULL) { 192 ResourceMark rm(THREAD); 193 THROW(vmSymbols::java_lang_InstantiationException()); 194 } 195 RetryableAllocationMark ram(thread, null_on_fail); 196 197 // Create new instance (the receiver) 198 klass->check_valid_for_instantiation(false, CHECK); 199 200 if (null_on_fail) { 201 if (!klass->is_initialized()) { 202 // Cannot re-execute class initialization without side effects 203 // so return without attempting the initialization 204 return; 205 } 206 } else { 207 // Make sure klass gets initialized 208 klass->initialize(CHECK); 209 } 210 211 oop obj = klass->allocate_instance(CHECK); 212 thread->set_vm_result(obj); 213 JRT_END 214 215 extern void vm_exit(int code); 216 217 // Enter this method from compiled code handler below. This is where we transition 218 // to VM mode. This is done as a helper routine so that the method called directly 219 // from compiled code does not have to transition to VM. This allows the entry 220 // method to see if the nmethod that we have just looked up a handler for has 221 // been deoptimized while we were in the vm. This simplifies the assembly code 222 // cpu directories. 223 // 224 // We are entering here from exception stub (via the entry method below) 225 // If there is a compiled exception handler in this method, we will continue there; 226 // otherwise we will unwind the stack and continue at the caller of top frame method 227 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to 228 // control the area where we can allow a safepoint. After we exit the safepoint area we can 229 // check to see if the handler we are going to return is now in a nmethod that has 230 // been deoptimized. If that is the case we return the deopt blob 231 // unpack_with_exception entry instead. This makes life for the exception blob easier 232 // because making that same check and diverting is painful from assembly language. 233 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm)) 234 // Reset method handle flag. 235 thread->set_is_method_handle_return(false); 236 237 Handle exception(thread, ex); 238 cm = CodeCache::find_compiled(pc); 239 assert(cm != NULL, "this is not a compiled method"); 240 // Adjust the pc as needed/ 241 if (cm->is_deopt_pc(pc)) { 242 RegisterMap map(thread, false); 243 frame exception_frame = thread->last_frame().sender(&map); 244 // if the frame isn't deopted then pc must not correspond to the caller of last_frame 245 assert(exception_frame.is_deoptimized_frame(), "must be deopted"); 246 pc = exception_frame.pc(); 247 } 248 #ifdef ASSERT 249 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception"); 250 assert(oopDesc::is_oop(exception()), "just checking"); 251 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 252 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { 253 if (ExitVMOnVerifyError) vm_exit(-1); 254 ShouldNotReachHere(); 255 } 256 #endif 257 258 // Check the stack guard pages and reenable them if necessary and there is 259 // enough space on the stack to do so. Use fast exceptions only if the guard 260 // pages are enabled. 261 bool guard_pages_enabled = thread->stack_guards_enabled(); 262 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); 263 264 if (JvmtiExport::can_post_on_exceptions()) { 265 // To ensure correct notification of exception catches and throws 266 // we have to deoptimize here. If we attempted to notify the 267 // catches and throws during this exception lookup it's possible 268 // we could deoptimize on the way out of the VM and end back in 269 // the interpreter at the throw site. This would result in double 270 // notifications since the interpreter would also notify about 271 // these same catches and throws as it unwound the frame. 272 273 RegisterMap reg_map(thread); 274 frame stub_frame = thread->last_frame(); 275 frame caller_frame = stub_frame.sender(®_map); 276 277 // We don't really want to deoptimize the nmethod itself since we 278 // can actually continue in the exception handler ourselves but I 279 // don't see an easy way to have the desired effect. 280 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); 281 assert(caller_is_deopted(), "Must be deoptimized"); 282 283 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); 284 } 285 286 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions 287 if (guard_pages_enabled) { 288 address fast_continuation = cm->handler_for_exception_and_pc(exception, pc); 289 if (fast_continuation != NULL) { 290 // Set flag if return address is a method handle call site. 291 thread->set_is_method_handle_return(cm->is_method_handle_return(pc)); 292 return fast_continuation; 293 } 294 } 295 296 // If the stack guard pages are enabled, check whether there is a handler in 297 // the current method. Otherwise (guard pages disabled), force an unwind and 298 // skip the exception cache update (i.e., just leave continuation==NULL). 299 address continuation = NULL; 300 if (guard_pages_enabled) { 301 302 // New exception handling mechanism can support inlined methods 303 // with exception handlers since the mappings are from PC to PC 304 305 // debugging support 306 // tracing 307 if (log_is_enabled(Info, exceptions)) { 308 ResourceMark rm; 309 stringStream tempst; 310 assert(cm->method() != NULL, "Unexpected null method()"); 311 tempst.print("compiled method <%s>\n" 312 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT, 313 cm->method()->print_value_string(), p2i(pc), p2i(thread)); 314 Exceptions::log_exception(exception, tempst.as_string()); 315 } 316 // for AbortVMOnException flag 317 NOT_PRODUCT(Exceptions::debug_check_abort(exception)); 318 319 // Clear out the exception oop and pc since looking up an 320 // exception handler can cause class loading, which might throw an 321 // exception and those fields are expected to be clear during 322 // normal bytecode execution. 323 thread->clear_exception_oop_and_pc(); 324 325 bool recursive_exception = false; 326 continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception); 327 // If an exception was thrown during exception dispatch, the exception oop may have changed 328 thread->set_exception_oop(exception()); 329 thread->set_exception_pc(pc); 330 331 // The exception cache is used only for non-implicit exceptions 332 // Update the exception cache only when another exception did 333 // occur during the computation of the compiled exception handler 334 // (e.g., when loading the class of the catch type). 335 // Checking for exception oop equality is not 336 // sufficient because some exceptions are pre-allocated and reused. 337 if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) { 338 cm->add_handler_for_exception_and_pc(exception, pc, continuation); 339 } 340 } 341 342 // Set flag if return address is a method handle call site. 343 thread->set_is_method_handle_return(cm->is_method_handle_return(pc)); 344 345 if (log_is_enabled(Info, exceptions)) { 346 ResourceMark rm; 347 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT 348 " for exception thrown at PC " PTR_FORMAT, 349 p2i(thread), p2i(continuation), p2i(pc)); 350 } 351 352 return continuation; 353 JRT_END 354 355 // Enter this method from compiled code only if there is a Java exception handler 356 // in the method handling the exception. 357 // We are entering here from exception stub. We don't do a normal VM transition here. 358 // We do it in a helper. This is so we can check to see if the nmethod we have just 359 // searched for an exception handler has been deoptimized in the meantime. 360 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) { 361 oop exception = thread->exception_oop(); 362 address pc = thread->exception_pc(); 363 // Still in Java mode 364 DEBUG_ONLY(ResetNoHandleMark rnhm); 365 CompiledMethod* cm = NULL; 366 address continuation = NULL; 367 { 368 // Enter VM mode by calling the helper 369 ResetNoHandleMark rnhm; 370 continuation = exception_handler_for_pc_helper(thread, exception, pc, cm); 371 } 372 // Back in JAVA, use no oops DON'T safepoint 373 374 // Now check to see if the compiled method we were called from is now deoptimized. 375 // If so we must return to the deopt blob and deoptimize the nmethod 376 if (cm != NULL && caller_is_deopted()) { 377 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); 378 } 379 380 assert(continuation != NULL, "no handler found"); 381 return continuation; 382 } 383 384 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock)) 385 IF_TRACE_jvmci_3 { 386 char type[O_BUFLEN]; 387 obj->klass()->name()->as_C_string(type, O_BUFLEN); 388 markOop mark = obj->mark(); 389 TRACE_jvmci_3("%s: entered locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, p2i(mark), p2i(lock)); 390 tty->flush(); 391 } 392 if (PrintBiasedLockingStatistics) { 393 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 394 } 395 Handle h_obj(thread, obj); 396 assert(oopDesc::is_oop(h_obj()), "must be NULL or an object"); 397 if (UseBiasedLocking) { 398 // Retry fast entry if bias is revoked to avoid unnecessary inflation 399 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); 400 } else { 401 if (JVMCIUseFastLocking) { 402 // When using fast locking, the compiled code has already tried the fast case 403 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD); 404 } else { 405 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD); 406 } 407 } 408 TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj)); 409 JRT_END 410 411 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock)) 412 assert(thread == JavaThread::current(), "threads must correspond"); 413 assert(thread->last_Java_sp(), "last_Java_sp must be set"); 414 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown 415 EXCEPTION_MARK; 416 417 #ifdef ASSERT 418 if (!oopDesc::is_oop(obj)) { 419 ResetNoHandleMark rhm; 420 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null(); 421 if (method != NULL) { 422 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj)); 423 } 424 thread->print_stack_on(tty); 425 assert(false, "invalid lock object pointer dected"); 426 } 427 #endif 428 429 if (JVMCIUseFastLocking) { 430 // When using fast locking, the compiled code has already tried the fast case 431 ObjectSynchronizer::slow_exit(obj, lock, THREAD); 432 } else { 433 ObjectSynchronizer::fast_exit(obj, lock, THREAD); 434 } 435 IF_TRACE_jvmci_3 { 436 char type[O_BUFLEN]; 437 obj->klass()->name()->as_C_string(type, O_BUFLEN); 438 TRACE_jvmci_3("%s: exited locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, p2i(obj->mark()), p2i(lock)); 439 tty->flush(); 440 } 441 JRT_END 442 443 // Object.notify() fast path, caller does slow path 444 JRT_LEAF(jboolean, JVMCIRuntime::object_notify(JavaThread *thread, oopDesc* obj)) 445 446 // Very few notify/notifyAll operations find any threads on the waitset, so 447 // the dominant fast-path is to simply return. 448 // Relatedly, it's critical that notify/notifyAll be fast in order to 449 // reduce lock hold times. 450 if (!SafepointSynchronize::is_synchronizing()) { 451 if (ObjectSynchronizer::quick_notify(obj, thread, false)) { 452 return true; 453 } 454 } 455 return false; // caller must perform slow path 456 457 JRT_END 458 459 // Object.notifyAll() fast path, caller does slow path 460 JRT_LEAF(jboolean, JVMCIRuntime::object_notifyAll(JavaThread *thread, oopDesc* obj)) 461 462 if (!SafepointSynchronize::is_synchronizing() ) { 463 if (ObjectSynchronizer::quick_notify(obj, thread, true)) { 464 return true; 465 } 466 } 467 return false; // caller must perform slow path 468 469 JRT_END 470 471 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message)) 472 TempNewSymbol symbol = SymbolTable::new_symbol(exception); 473 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message); 474 JRT_END 475 476 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass)) 477 ResourceMark rm(thread); 478 TempNewSymbol symbol = SymbolTable::new_symbol(exception); 479 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name()); 480 JRT_END 481 482 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass)) 483 ResourceMark rm(thread); 484 const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass); 485 TempNewSymbol symbol = SymbolTable::new_symbol(exception); 486 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message); 487 JRT_END 488 489 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline)) 490 ttyLocker ttyl; 491 492 if (obj == NULL) { 493 tty->print("NULL"); 494 } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) { 495 if (oopDesc::is_oop_or_null(obj, true)) { 496 char buf[O_BUFLEN]; 497 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj)); 498 } else { 499 tty->print(INTPTR_FORMAT, p2i(obj)); 500 } 501 } else { 502 ResourceMark rm; 503 assert(obj != NULL && java_lang_String::is_instance(obj), "must be"); 504 char *buf = java_lang_String::as_utf8_string(obj); 505 tty->print_raw(buf); 506 } 507 if (newline) { 508 tty->cr(); 509 } 510 JRT_END 511 512 #if INCLUDE_G1GC 513 514 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj)) 515 G1ThreadLocalData::satb_mark_queue(thread).enqueue(obj); 516 JRT_END 517 518 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr)) 519 G1ThreadLocalData::dirty_card_queue(thread).enqueue(card_addr); 520 JRT_END 521 522 #endif // INCLUDE_G1GC 523 524 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child)) 525 bool ret = true; 526 if(!Universe::heap()->is_in(parent)) { 527 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent)); 528 parent->print(); 529 ret=false; 530 } 531 if(!Universe::heap()->is_in(child)) { 532 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child)); 533 child->print(); 534 ret=false; 535 } 536 return (jint)ret; 537 JRT_END 538 539 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value)) 540 ResourceMark rm; 541 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where; 542 char *detail_msg = NULL; 543 if (format != 0L) { 544 const char* buf = (char*) (address) format; 545 size_t detail_msg_length = strlen(buf) * 2; 546 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length); 547 jio_snprintf(detail_msg, detail_msg_length, buf, value); 548 } 549 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg); 550 JRT_END 551 552 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread)) 553 oop exception = thread->exception_oop(); 554 assert(exception != NULL, "npe"); 555 thread->set_exception_oop(NULL); 556 thread->set_exception_pc(0); 557 return exception; 558 JRT_END 559 560 PRAGMA_DIAG_PUSH 561 PRAGMA_FORMAT_NONLITERAL_IGNORED 562 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, const char* format, jlong v1, jlong v2, jlong v3)) 563 ResourceMark rm; 564 tty->print(format, v1, v2, v3); 565 JRT_END 566 PRAGMA_DIAG_POP 567 568 static void decipher(jlong v, bool ignoreZero) { 569 if (v != 0 || !ignoreZero) { 570 void* p = (void *)(address) v; 571 CodeBlob* cb = CodeCache::find_blob(p); 572 if (cb) { 573 if (cb->is_nmethod()) { 574 char buf[O_BUFLEN]; 575 tty->print("%s [" INTPTR_FORMAT "+" JLONG_FORMAT "]", cb->as_nmethod_or_null()->method()->name_and_sig_as_C_string(buf, O_BUFLEN), p2i(cb->code_begin()), (jlong)((address)v - cb->code_begin())); 576 return; 577 } 578 cb->print_value_on(tty); 579 return; 580 } 581 if (Universe::heap()->is_in(p)) { 582 oop obj = oop(p); 583 obj->print_value_on(tty); 584 return; 585 } 586 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v); 587 } 588 } 589 590 PRAGMA_DIAG_PUSH 591 PRAGMA_FORMAT_NONLITERAL_IGNORED 592 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3)) 593 ResourceMark rm; 594 const char *buf = (const char*) (address) format; 595 if (vmError) { 596 if (buf != NULL) { 597 fatal(buf, v1, v2, v3); 598 } else { 599 fatal("<anonymous error>"); 600 } 601 } else if (buf != NULL) { 602 tty->print(buf, v1, v2, v3); 603 } else { 604 assert(v2 == 0, "v2 != 0"); 605 assert(v3 == 0, "v3 != 0"); 606 decipher(v1, false); 607 } 608 JRT_END 609 PRAGMA_DIAG_POP 610 611 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline)) 612 union { 613 jlong l; 614 jdouble d; 615 jfloat f; 616 } uu; 617 uu.l = value; 618 switch (typeChar) { 619 case 'Z': tty->print(value == 0 ? "false" : "true"); break; 620 case 'B': tty->print("%d", (jbyte) value); break; 621 case 'C': tty->print("%c", (jchar) value); break; 622 case 'S': tty->print("%d", (jshort) value); break; 623 case 'I': tty->print("%d", (jint) value); break; 624 case 'F': tty->print("%f", uu.f); break; 625 case 'J': tty->print(JLONG_FORMAT, value); break; 626 case 'D': tty->print("%lf", uu.d); break; 627 default: assert(false, "unknown typeChar"); break; 628 } 629 if (newline) { 630 tty->cr(); 631 } 632 JRT_END 633 634 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj)) 635 return (jint) obj->identity_hash(); 636 JRT_END 637 638 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted)) 639 Handle receiverHandle(thread, receiver); 640 // A nested ThreadsListHandle may require the Threads_lock which 641 // requires thread_in_vm which is why this method cannot be JRT_LEAF. 642 ThreadsListHandle tlh; 643 644 JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle()); 645 if (receiverThread == NULL || (EnableThreadSMRExtraValidityChecks && !tlh.includes(receiverThread))) { 646 // The other thread may exit during this process, which is ok so return false. 647 return JNI_FALSE; 648 } else { 649 return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0); 650 } 651 JRT_END 652 653 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value)) 654 deopt_caller(); 655 return (jint) value; 656 JRT_END 657 658 659 // private static JVMCIRuntime JVMCI.initializeRuntime() 660 JVM_ENTRY_NO_ENV(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c)) 661 JNI_JVMCIENV(thread, env); 662 if (!EnableJVMCI) { 663 JVMCI_THROW_MSG_NULL(InternalError, "JVMCI is not enabled"); 664 } 665 JVMCIENV->runtime()->initialize_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL); 666 JVMCIObject runtime = JVMCIENV->runtime()->get_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL); 667 return JVMCIENV->get_jobject(runtime); 668 JVM_END 669 670 void JVMCIRuntime::call_getCompiler(TRAPS) { 671 THREAD_JVMCIENV(JavaThread::current()); 672 JVMCIObject jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(JVMCI_CHECK); 673 initialize(JVMCIENV); 674 JVMCIENV->call_HotSpotJVMCIRuntime_getCompiler(jvmciRuntime, JVMCI_CHECK); 675 } 676 677 void JVMCINMethodData::initialize( 678 int nmethod_mirror_index, 679 const char* name, 680 FailedSpeculation** failed_speculations) 681 { 682 _failed_speculations = failed_speculations; 683 _nmethod_mirror_index = nmethod_mirror_index; 684 if (name != NULL) { 685 _has_name = true; 686 char* dest = (char*) this->name(); 687 strcpy(dest, name); 688 } else { 689 _has_name = false; 690 } 691 } 692 693 void JVMCINMethodData::add_failed_speculation(nmethod* nm, jlong speculation) { 694 uint index = (speculation >> 32) & 0xFFFFFFFF; 695 int length = (int) speculation; 696 if (index + length > (uint) nm->speculations_size()) { 697 fatal(INTPTR_FORMAT "[index: %d, length: %d] out of bounds wrt encoded speculations of length %u", speculation, index, length, nm->speculations_size()); 698 } 699 address data = nm->speculations_begin() + index; 700 FailedSpeculation::add_failed_speculation(nm, _failed_speculations, data, length); 701 } 702 703 oop JVMCINMethodData::get_nmethod_mirror(nmethod* nm) { 704 if (_nmethod_mirror_index == -1) { 705 return NULL; 706 } 707 return nm->oop_at(_nmethod_mirror_index); 708 } 709 710 void JVMCINMethodData::set_nmethod_mirror(nmethod* nm, oop new_mirror) { 711 assert(_nmethod_mirror_index != -1, "cannot set JVMCI mirror for nmethod"); 712 oop* addr = nm->oop_addr_at(_nmethod_mirror_index); 713 assert(new_mirror != NULL, "use clear_nmethod_mirror to clear the mirror"); 714 assert(*addr == NULL, "cannot overwrite non-null mirror"); 715 716 *addr = new_mirror; 717 718 // Since we've patched some oops in the nmethod, 719 // (re)register it with the heap. 720 Universe::heap()->register_nmethod(nm); 721 } 722 723 void JVMCINMethodData::clear_nmethod_mirror(nmethod* nm) { 724 if (_nmethod_mirror_index != -1) { 725 oop* addr = nm->oop_addr_at(_nmethod_mirror_index); 726 *addr = NULL; 727 } 728 } 729 730 void JVMCINMethodData::invalidate_nmethod_mirror(nmethod* nm) { 731 oop nmethod_mirror = get_nmethod_mirror(nm); 732 if (nmethod_mirror == NULL) { 733 return; 734 } 735 736 // Update the values in the mirror if it still refers to nm. 737 // We cannot use JVMCIObject to wrap the mirror as this is called 738 // during GC, forbidding the creation of JNIHandles. 739 JVMCIEnv* jvmciEnv = NULL; 740 nmethod* current = (nmethod*) HotSpotJVMCI::InstalledCode::address(jvmciEnv, nmethod_mirror); 741 if (nm == current) { 742 if (!nm->is_alive()) { 743 // Break the link from the mirror to nm such that 744 // future invocations via the mirror will result in 745 // an InvalidInstalledCodeException. 746 HotSpotJVMCI::InstalledCode::set_address(jvmciEnv, nmethod_mirror, 0); 747 HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0); 748 } else if (nm->is_not_entrant()) { 749 // Zero the entry point so any new invocation will fail but keep 750 // the address link around that so that existing activations can 751 // be deoptimized via the mirror (i.e. JVMCIEnv::invalidate_installed_code). 752 HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0); 753 } 754 } 755 } 756 757 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(JVMCI_TRAPS) { 758 if (is_HotSpotJVMCIRuntime_initialized()) { 759 if (JVMCIENV->is_hotspot() && UseJVMCINativeLibrary) { 760 JVMCI_THROW_MSG(InternalError, "JVMCI has already been enabled in the JVMCI shared library"); 761 } 762 } 763 764 initialize(JVMCIENV); 765 766 // This should only be called in the context of the JVMCI class being initialized 767 JVMCIObject result = JVMCIENV->call_HotSpotJVMCIRuntime_runtime(JVMCI_CHECK); 768 769 _HotSpotJVMCIRuntime_instance = JVMCIENV->make_global(result); 770 } 771 772 void JVMCIRuntime::initialize(JVMCIEnv* JVMCIENV) { 773 assert(this != NULL, "sanity"); 774 // Check first without JVMCI_lock 775 if (_initialized) { 776 return; 777 } 778 779 MutexLocker locker(JVMCI_lock); 780 // Check again under JVMCI_lock 781 if (_initialized) { 782 return; 783 } 784 785 while (_being_initialized) { 786 JVMCI_lock->wait(); 787 if (_initialized) { 788 return; 789 } 790 } 791 792 _being_initialized = true; 793 794 { 795 MutexUnlocker unlock(JVMCI_lock); 796 797 HandleMark hm; 798 ResourceMark rm; 799 JavaThread* THREAD = JavaThread::current(); 800 if (JVMCIENV->is_hotspot()) { 801 HotSpotJVMCI::compute_offsets(CHECK_EXIT); 802 } else { 803 JNIAccessMark jni(JVMCIENV); 804 805 JNIJVMCI::initialize_ids(jni.env()); 806 if (jni()->ExceptionCheck()) { 807 jni()->ExceptionDescribe(); 808 fatal("JNI exception during init"); 809 } 810 } 811 create_jvmci_primitive_type(T_BOOLEAN, JVMCI_CHECK_EXIT_((void)0)); 812 create_jvmci_primitive_type(T_BYTE, JVMCI_CHECK_EXIT_((void)0)); 813 create_jvmci_primitive_type(T_CHAR, JVMCI_CHECK_EXIT_((void)0)); 814 create_jvmci_primitive_type(T_SHORT, JVMCI_CHECK_EXIT_((void)0)); 815 create_jvmci_primitive_type(T_INT, JVMCI_CHECK_EXIT_((void)0)); 816 create_jvmci_primitive_type(T_LONG, JVMCI_CHECK_EXIT_((void)0)); 817 create_jvmci_primitive_type(T_FLOAT, JVMCI_CHECK_EXIT_((void)0)); 818 create_jvmci_primitive_type(T_DOUBLE, JVMCI_CHECK_EXIT_((void)0)); 819 create_jvmci_primitive_type(T_VOID, JVMCI_CHECK_EXIT_((void)0)); 820 821 if (!JVMCIENV->is_hotspot()) { 822 JVMCIENV->copy_saved_properties(); 823 } 824 } 825 826 _initialized = true; 827 _being_initialized = false; 828 JVMCI_lock->notify_all(); 829 } 830 831 JVMCIObject JVMCIRuntime::create_jvmci_primitive_type(BasicType type, JVMCI_TRAPS) { 832 Thread* THREAD = Thread::current(); 833 // These primitive types are long lived and are created before the runtime is fully set up 834 // so skip registering them for scanning. 835 JVMCIObject mirror = JVMCIENV->get_object_constant(java_lang_Class::primitive_mirror(type), false, true); 836 if (JVMCIENV->is_hotspot()) { 837 JavaValue result(T_OBJECT); 838 JavaCallArguments args; 839 args.push_oop(Handle(THREAD, HotSpotJVMCI::resolve(mirror))); 840 args.push_int(type2char(type)); 841 JavaCalls::call_static(&result, HotSpotJVMCI::HotSpotResolvedPrimitiveType::klass(), vmSymbols::fromMetaspace_name(), vmSymbols::primitive_fromMetaspace_signature(), &args, CHECK_(JVMCIObject())); 842 843 return JVMCIENV->wrap(JNIHandles::make_local((oop)result.get_jobject())); 844 } else { 845 JNIAccessMark jni(JVMCIENV); 846 jobject result = jni()->CallStaticObjectMethod(JNIJVMCI::HotSpotResolvedPrimitiveType::clazz(), 847 JNIJVMCI::HotSpotResolvedPrimitiveType_fromMetaspace_method(), 848 mirror.as_jobject(), type2char(type)); 849 if (jni()->ExceptionCheck()) { 850 return JVMCIObject(); 851 } 852 return JVMCIENV->wrap(result); 853 } 854 } 855 856 void JVMCIRuntime::initialize_JVMCI(JVMCI_TRAPS) { 857 if (!is_HotSpotJVMCIRuntime_initialized()) { 858 initialize(JVMCI_CHECK); 859 JVMCIENV->call_JVMCI_getRuntime(JVMCI_CHECK); 860 } 861 } 862 863 JVMCIObject JVMCIRuntime::get_HotSpotJVMCIRuntime(JVMCI_TRAPS) { 864 initialize(JVMCIENV); 865 initialize_JVMCI(JVMCI_CHECK_(JVMCIObject())); 866 return _HotSpotJVMCIRuntime_instance; 867 } 868 869 870 // private void CompilerToVM.registerNatives() 871 JVM_ENTRY_NO_ENV(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass)) 872 873 #ifdef _LP64 874 #ifndef TARGET_ARCH_sparc 875 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end(); 876 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024; 877 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)"); 878 #endif // TARGET_ARCH_sparc 879 #else 880 fatal("check TLAB allocation code for address space conflicts"); 881 #endif 882 883 JNI_JVMCIENV(thread, env); 884 885 if (!EnableJVMCI) { 886 JVMCI_THROW_MSG(InternalError, "JVMCI is not enabled"); 887 } 888 889 JVMCIENV->runtime()->initialize(JVMCIENV); 890 891 { 892 ResourceMark rm; 893 HandleMark hm(thread); 894 ThreadToNativeFromVM trans(thread); 895 896 // Ensure _non_oop_bits is initialized 897 Universe::non_oop_word(); 898 899 if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count())) { 900 if (!env->ExceptionCheck()) { 901 for (int i = 0; i < CompilerToVM::methods_count(); i++) { 902 if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods + i, 1)) { 903 guarantee(false, "Error registering JNI method %s%s", CompilerToVM::methods[i].name, CompilerToVM::methods[i].signature); 904 break; 905 } 906 } 907 } else { 908 env->ExceptionDescribe(); 909 } 910 guarantee(false, "Failed registering CompilerToVM native methods"); 911 } 912 } 913 JVM_END 914 915 916 void JVMCIRuntime::shutdown() { 917 if (is_HotSpotJVMCIRuntime_initialized()) { 918 _shutdown_called = true; 919 920 THREAD_JVMCIENV(JavaThread::current()); 921 JVMCIENV->call_HotSpotJVMCIRuntime_shutdown(_HotSpotJVMCIRuntime_instance); 922 } 923 } 924 925 void JVMCIRuntime::bootstrap_finished(TRAPS) { 926 if (is_HotSpotJVMCIRuntime_initialized()) { 927 THREAD_JVMCIENV(JavaThread::current()); 928 JVMCIENV->call_HotSpotJVMCIRuntime_bootstrapFinished(_HotSpotJVMCIRuntime_instance, JVMCIENV); 929 } 930 } 931 932 void JVMCIRuntime::describe_pending_hotspot_exception(JavaThread* THREAD, bool clear) { 933 if (HAS_PENDING_EXCEPTION) { 934 Handle exception(THREAD, PENDING_EXCEPTION); 935 const char* exception_file = THREAD->exception_file(); 936 int exception_line = THREAD->exception_line(); 937 CLEAR_PENDING_EXCEPTION; 938 if (exception->is_a(SystemDictionary::ThreadDeath_klass())) { 939 // Don't print anything if we are being killed. 940 } else { 941 java_lang_Throwable::print(exception(), tty); 942 tty->cr(); 943 java_lang_Throwable::print_stack_trace(exception, tty); 944 945 // Clear and ignore any exceptions raised during printing 946 CLEAR_PENDING_EXCEPTION; 947 } 948 if (!clear) { 949 THREAD->set_pending_exception(exception(), exception_file, exception_line); 950 } 951 } 952 } 953 954 955 void JVMCIRuntime::exit_on_pending_exception(JVMCIEnv* JVMCIENV, const char* message) { 956 JavaThread* THREAD = JavaThread::current(); 957 958 static volatile int report_error = 0; 959 if (!report_error && Atomic::cmpxchg(1, &report_error, 0) == 0) { 960 // Only report an error once 961 tty->print_raw_cr(message); 962 if (JVMCIENV != NULL) { 963 JVMCIENV->describe_pending_exception(true); 964 } else { 965 describe_pending_hotspot_exception(THREAD, true); 966 } 967 } else { 968 // Allow error reporting thread to print the stack trace. Windows 969 // doesn't allow uninterruptible wait for JavaThreads 970 const bool interruptible = true; 971 os::sleep(THREAD, 200, interruptible); 972 } 973 974 before_exit(THREAD); 975 vm_exit(-1); 976 } 977 978 // ------------------------------------------------------------------ 979 // Note: the logic of this method should mirror the logic of 980 // constantPoolOopDesc::verify_constant_pool_resolve. 981 bool JVMCIRuntime::check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass) { 982 if (accessing_klass->is_objArray_klass()) { 983 accessing_klass = ObjArrayKlass::cast(accessing_klass)->bottom_klass(); 984 } 985 if (!accessing_klass->is_instance_klass()) { 986 return true; 987 } 988 989 if (resolved_klass->is_objArray_klass()) { 990 // Find the element klass, if this is an array. 991 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass(); 992 } 993 if (resolved_klass->is_instance_klass()) { 994 Reflection::VerifyClassAccessResults result = 995 Reflection::verify_class_access(accessing_klass, InstanceKlass::cast(resolved_klass), true); 996 return result == Reflection::ACCESS_OK; 997 } 998 return true; 999 } 1000 1001 // ------------------------------------------------------------------ 1002 Klass* JVMCIRuntime::get_klass_by_name_impl(Klass*& accessing_klass, 1003 const constantPoolHandle& cpool, 1004 Symbol* sym, 1005 bool require_local) { 1006 JVMCI_EXCEPTION_CONTEXT; 1007 1008 // Now we need to check the SystemDictionary 1009 if (sym->char_at(0) == 'L' && 1010 sym->char_at(sym->utf8_length()-1) == ';') { 1011 // This is a name from a signature. Strip off the trimmings. 1012 // Call recursive to keep scope of strippedsym. 1013 TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1, 1014 sym->utf8_length()-2); 1015 return get_klass_by_name_impl(accessing_klass, cpool, strippedsym, require_local); 1016 } 1017 1018 Handle loader(THREAD, (oop)NULL); 1019 Handle domain(THREAD, (oop)NULL); 1020 if (accessing_klass != NULL) { 1021 loader = Handle(THREAD, accessing_klass->class_loader()); 1022 domain = Handle(THREAD, accessing_klass->protection_domain()); 1023 } 1024 1025 Klass* found_klass; 1026 { 1027 ttyUnlocker ttyul; // release tty lock to avoid ordering problems 1028 MutexLocker ml(Compile_lock); 1029 if (!require_local) { 1030 found_klass = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader, CHECK_NULL); 1031 } else { 1032 found_klass = SystemDictionary::find_instance_or_array_klass(sym, loader, domain, CHECK_NULL); 1033 } 1034 } 1035 1036 // If we fail to find an array klass, look again for its element type. 1037 // The element type may be available either locally or via constraints. 1038 // In either case, if we can find the element type in the system dictionary, 1039 // we must build an array type around it. The CI requires array klasses 1040 // to be loaded if their element klasses are loaded, except when memory 1041 // is exhausted. 1042 if (sym->char_at(0) == '[' && 1043 (sym->char_at(1) == '[' || sym->char_at(1) == 'L')) { 1044 // We have an unloaded array. 1045 // Build it on the fly if the element class exists. 1046 TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1, 1047 sym->utf8_length()-1); 1048 1049 // Get element Klass recursively. 1050 Klass* elem_klass = 1051 get_klass_by_name_impl(accessing_klass, 1052 cpool, 1053 elem_sym, 1054 require_local); 1055 if (elem_klass != NULL) { 1056 // Now make an array for it 1057 return elem_klass->array_klass(THREAD); 1058 } 1059 } 1060 1061 if (found_klass == NULL && !cpool.is_null() && cpool->has_preresolution()) { 1062 // Look inside the constant pool for pre-resolved class entries. 1063 for (int i = cpool->length() - 1; i >= 1; i--) { 1064 if (cpool->tag_at(i).is_klass()) { 1065 Klass* kls = cpool->resolved_klass_at(i); 1066 if (kls->name() == sym) { 1067 return kls; 1068 } 1069 } 1070 } 1071 } 1072 1073 return found_klass; 1074 } 1075 1076 // ------------------------------------------------------------------ 1077 Klass* JVMCIRuntime::get_klass_by_name(Klass* accessing_klass, 1078 Symbol* klass_name, 1079 bool require_local) { 1080 ResourceMark rm; 1081 constantPoolHandle cpool; 1082 return get_klass_by_name_impl(accessing_klass, 1083 cpool, 1084 klass_name, 1085 require_local); 1086 } 1087 1088 // ------------------------------------------------------------------ 1089 // Implementation of get_klass_by_index. 1090 Klass* JVMCIRuntime::get_klass_by_index_impl(const constantPoolHandle& cpool, 1091 int index, 1092 bool& is_accessible, 1093 Klass* accessor) { 1094 JVMCI_EXCEPTION_CONTEXT; 1095 Klass* klass = ConstantPool::klass_at_if_loaded(cpool, index); 1096 Symbol* klass_name = NULL; 1097 if (klass == NULL) { 1098 klass_name = cpool->klass_name_at(index); 1099 } 1100 1101 if (klass == NULL) { 1102 // Not found in constant pool. Use the name to do the lookup. 1103 Klass* k = get_klass_by_name_impl(accessor, 1104 cpool, 1105 klass_name, 1106 false); 1107 // Calculate accessibility the hard way. 1108 if (k == NULL) { 1109 is_accessible = false; 1110 } else if (k->class_loader() != accessor->class_loader() && 1111 get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) { 1112 // Loaded only remotely. Not linked yet. 1113 is_accessible = false; 1114 } else { 1115 // Linked locally, and we must also check public/private, etc. 1116 is_accessible = check_klass_accessibility(accessor, k); 1117 } 1118 if (!is_accessible) { 1119 return NULL; 1120 } 1121 return k; 1122 } 1123 1124 // It is known to be accessible, since it was found in the constant pool. 1125 is_accessible = true; 1126 return klass; 1127 } 1128 1129 // ------------------------------------------------------------------ 1130 // Get a klass from the constant pool. 1131 Klass* JVMCIRuntime::get_klass_by_index(const constantPoolHandle& cpool, 1132 int index, 1133 bool& is_accessible, 1134 Klass* accessor) { 1135 ResourceMark rm; 1136 Klass* result = get_klass_by_index_impl(cpool, index, is_accessible, accessor); 1137 return result; 1138 } 1139 1140 // ------------------------------------------------------------------ 1141 // Implementation of get_field_by_index. 1142 // 1143 // Implementation note: the results of field lookups are cached 1144 // in the accessor klass. 1145 void JVMCIRuntime::get_field_by_index_impl(InstanceKlass* klass, fieldDescriptor& field_desc, 1146 int index) { 1147 JVMCI_EXCEPTION_CONTEXT; 1148 1149 assert(klass->is_linked(), "must be linked before using its constant-pool"); 1150 1151 constantPoolHandle cpool(thread, klass->constants()); 1152 1153 // Get the field's name, signature, and type. 1154 Symbol* name = cpool->name_ref_at(index); 1155 1156 int nt_index = cpool->name_and_type_ref_index_at(index); 1157 int sig_index = cpool->signature_ref_index_at(nt_index); 1158 Symbol* signature = cpool->symbol_at(sig_index); 1159 1160 // Get the field's declared holder. 1161 int holder_index = cpool->klass_ref_index_at(index); 1162 bool holder_is_accessible; 1163 Klass* declared_holder = get_klass_by_index(cpool, holder_index, 1164 holder_is_accessible, 1165 klass); 1166 1167 // The declared holder of this field may not have been loaded. 1168 // Bail out with partial field information. 1169 if (!holder_is_accessible) { 1170 return; 1171 } 1172 1173 1174 // Perform the field lookup. 1175 Klass* canonical_holder = 1176 InstanceKlass::cast(declared_holder)->find_field(name, signature, &field_desc); 1177 if (canonical_holder == NULL) { 1178 return; 1179 } 1180 1181 assert(canonical_holder == field_desc.field_holder(), "just checking"); 1182 } 1183 1184 // ------------------------------------------------------------------ 1185 // Get a field by index from a klass's constant pool. 1186 void JVMCIRuntime::get_field_by_index(InstanceKlass* accessor, fieldDescriptor& fd, int index) { 1187 ResourceMark rm; 1188 return get_field_by_index_impl(accessor, fd, index); 1189 } 1190 1191 // ------------------------------------------------------------------ 1192 // Perform an appropriate method lookup based on accessor, holder, 1193 // name, signature, and bytecode. 1194 methodHandle JVMCIRuntime::lookup_method(InstanceKlass* accessor, 1195 Klass* holder, 1196 Symbol* name, 1197 Symbol* sig, 1198 Bytecodes::Code bc, 1199 constantTag tag) { 1200 // Accessibility checks are performed in JVMCIEnv::get_method_by_index_impl(). 1201 assert(check_klass_accessibility(accessor, holder), "holder not accessible"); 1202 1203 methodHandle dest_method; 1204 LinkInfo link_info(holder, name, sig, accessor, LinkInfo::needs_access_check, tag); 1205 switch (bc) { 1206 case Bytecodes::_invokestatic: 1207 dest_method = 1208 LinkResolver::resolve_static_call_or_null(link_info); 1209 break; 1210 case Bytecodes::_invokespecial: 1211 dest_method = 1212 LinkResolver::resolve_special_call_or_null(link_info); 1213 break; 1214 case Bytecodes::_invokeinterface: 1215 dest_method = 1216 LinkResolver::linktime_resolve_interface_method_or_null(link_info); 1217 break; 1218 case Bytecodes::_invokevirtual: 1219 dest_method = 1220 LinkResolver::linktime_resolve_virtual_method_or_null(link_info); 1221 break; 1222 default: ShouldNotReachHere(); 1223 } 1224 1225 return dest_method; 1226 } 1227 1228 1229 // ------------------------------------------------------------------ 1230 methodHandle JVMCIRuntime::get_method_by_index_impl(const constantPoolHandle& cpool, 1231 int index, Bytecodes::Code bc, 1232 InstanceKlass* accessor) { 1233 if (bc == Bytecodes::_invokedynamic) { 1234 ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index); 1235 bool is_resolved = !cpce->is_f1_null(); 1236 if (is_resolved) { 1237 // Get the invoker Method* from the constant pool. 1238 // (The appendix argument, if any, will be noted in the method's signature.) 1239 Method* adapter = cpce->f1_as_method(); 1240 return methodHandle(adapter); 1241 } 1242 1243 return NULL; 1244 } 1245 1246 int holder_index = cpool->klass_ref_index_at(index); 1247 bool holder_is_accessible; 1248 Klass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor); 1249 1250 // Get the method's name and signature. 1251 Symbol* name_sym = cpool->name_ref_at(index); 1252 Symbol* sig_sym = cpool->signature_ref_at(index); 1253 1254 if (cpool->has_preresolution() 1255 || ((holder == SystemDictionary::MethodHandle_klass() || holder == SystemDictionary::VarHandle_klass()) && 1256 MethodHandles::is_signature_polymorphic_name(holder, name_sym))) { 1257 // Short-circuit lookups for JSR 292-related call sites. 1258 // That is, do not rely only on name-based lookups, because they may fail 1259 // if the names are not resolvable in the boot class loader (7056328). 1260 switch (bc) { 1261 case Bytecodes::_invokevirtual: 1262 case Bytecodes::_invokeinterface: 1263 case Bytecodes::_invokespecial: 1264 case Bytecodes::_invokestatic: 1265 { 1266 Method* m = ConstantPool::method_at_if_loaded(cpool, index); 1267 if (m != NULL) { 1268 return m; 1269 } 1270 } 1271 break; 1272 default: 1273 break; 1274 } 1275 } 1276 1277 if (holder_is_accessible) { // Our declared holder is loaded. 1278 constantTag tag = cpool->tag_ref_at(index); 1279 methodHandle m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag); 1280 if (!m.is_null()) { 1281 // We found the method. 1282 return m; 1283 } 1284 } 1285 1286 // Either the declared holder was not loaded, or the method could 1287 // not be found. 1288 1289 return NULL; 1290 } 1291 1292 // ------------------------------------------------------------------ 1293 InstanceKlass* JVMCIRuntime::get_instance_klass_for_declared_method_holder(Klass* method_holder) { 1294 // For the case of <array>.clone(), the method holder can be an ArrayKlass* 1295 // instead of an InstanceKlass*. For that case simply pretend that the 1296 // declared holder is Object.clone since that's where the call will bottom out. 1297 if (method_holder->is_instance_klass()) { 1298 return InstanceKlass::cast(method_holder); 1299 } else if (method_holder->is_array_klass()) { 1300 return InstanceKlass::cast(SystemDictionary::Object_klass()); 1301 } else { 1302 ShouldNotReachHere(); 1303 } 1304 return NULL; 1305 } 1306 1307 1308 // ------------------------------------------------------------------ 1309 methodHandle JVMCIRuntime::get_method_by_index(const constantPoolHandle& cpool, 1310 int index, Bytecodes::Code bc, 1311 InstanceKlass* accessor) { 1312 ResourceMark rm; 1313 return get_method_by_index_impl(cpool, index, bc, accessor); 1314 } 1315 1316 // ------------------------------------------------------------------ 1317 // Check for changes to the system dictionary during compilation 1318 // class loads, evolution, breakpoints 1319 JVMCI::CodeInstallResult JVMCIRuntime::validate_compile_task_dependencies(Dependencies* dependencies, JVMCICompileState* compile_state, char** failure_detail) { 1320 // If JVMTI capabilities were enabled during compile, the compilation is invalidated. 1321 if (compile_state != NULL && compile_state->jvmti_state_changed()) { 1322 *failure_detail = (char*) "Jvmti state change during compilation invalidated dependencies"; 1323 return JVMCI::dependencies_failed; 1324 } 1325 1326 // Dependencies must be checked when the system dictionary changes 1327 // or if we don't know whether it has changed (i.e., compile_state == NULL). 1328 bool counter_changed = compile_state == NULL || compile_state->system_dictionary_modification_counter() != SystemDictionary::number_of_modifications(); 1329 CompileTask* task = compile_state == NULL ? NULL : compile_state->task(); 1330 Dependencies::DepType result = dependencies->validate_dependencies(task, counter_changed, failure_detail); 1331 if (result == Dependencies::end_marker) { 1332 return JVMCI::ok; 1333 } 1334 1335 if (!Dependencies::is_klass_type(result) || counter_changed) { 1336 return JVMCI::dependencies_failed; 1337 } 1338 // The dependencies were invalid at the time of installation 1339 // without any intervening modification of the system 1340 // dictionary. That means they were invalidly constructed. 1341 return JVMCI::dependencies_invalid; 1342 } 1343 1344 1345 void JVMCIRuntime::compile_method(JVMCIEnv* JVMCIENV, JVMCICompiler* compiler, const methodHandle& method, int entry_bci) { 1346 JVMCI_EXCEPTION_CONTEXT 1347 1348 JVMCICompileState* compile_state = JVMCIENV->compile_state(); 1349 1350 bool is_osr = entry_bci != InvocationEntryBci; 1351 if (compiler->is_bootstrapping() && is_osr) { 1352 // no OSR compilations during bootstrap - the compiler is just too slow at this point, 1353 // and we know that there are no endless loops 1354 compile_state->set_failure(true, "No OSR during boostrap"); 1355 return; 1356 } 1357 if (JVMCI::shutdown_called()) { 1358 compile_state->set_failure(false, "Avoiding compilation during shutdown"); 1359 return; 1360 } 1361 1362 HandleMark hm; 1363 JVMCIObject receiver = get_HotSpotJVMCIRuntime(JVMCIENV); 1364 if (JVMCIENV->has_pending_exception()) { 1365 JVMCIENV->describe_pending_exception(true); 1366 compile_state->set_failure(false, "exception getting HotSpotJVMCIRuntime object"); 1367 return; 1368 } 1369 JVMCIObject jvmci_method = JVMCIENV->get_jvmci_method(method, JVMCIENV); 1370 if (JVMCIENV->has_pending_exception()) { 1371 JVMCIENV->describe_pending_exception(true); 1372 compile_state->set_failure(false, "exception getting JVMCI wrapper method"); 1373 return; 1374 } 1375 1376 JVMCIObject result_object = JVMCIENV->call_HotSpotJVMCIRuntime_compileMethod(receiver, jvmci_method, entry_bci, 1377 (jlong) compile_state, compile_state->task()->compile_id()); 1378 if (!JVMCIENV->has_pending_exception()) { 1379 if (result_object.is_non_null()) { 1380 JVMCIObject failure_message = JVMCIENV->get_HotSpotCompilationRequestResult_failureMessage(result_object); 1381 if (failure_message.is_non_null()) { 1382 // Copy failure reason into resource memory first ... 1383 const char* failure_reason = JVMCIENV->as_utf8_string(failure_message); 1384 // ... and then into the C heap. 1385 failure_reason = os::strdup(failure_reason, mtJVMCI); 1386 bool retryable = JVMCIENV->get_HotSpotCompilationRequestResult_retry(result_object) != 0; 1387 compile_state->set_failure(retryable, failure_reason, true); 1388 } else { 1389 if (compile_state->task()->code() == NULL) { 1390 compile_state->set_failure(true, "no nmethod produced"); 1391 } else { 1392 compile_state->task()->set_num_inlined_bytecodes(JVMCIENV->get_HotSpotCompilationRequestResult_inlinedBytecodes(result_object)); 1393 compiler->inc_methods_compiled(); 1394 } 1395 } 1396 } else { 1397 assert(false, "JVMCICompiler.compileMethod should always return non-null"); 1398 } 1399 } else { 1400 // An uncaught exception was thrown during compilation. Generally these 1401 // should be handled by the Java code in some useful way but if they leak 1402 // through to here report them instead of dying or silently ignoring them. 1403 JVMCIENV->describe_pending_exception(true); 1404 compile_state->set_failure(false, "unexpected exception thrown"); 1405 } 1406 if (compiler->is_bootstrapping()) { 1407 compiler->set_bootstrap_compilation_request_handled(); 1408 } 1409 } 1410 1411 1412 // ------------------------------------------------------------------ 1413 JVMCI::CodeInstallResult JVMCIRuntime::register_method(JVMCIEnv* JVMCIENV, 1414 const methodHandle& method, 1415 nmethod*& nm, 1416 int entry_bci, 1417 CodeOffsets* offsets, 1418 int orig_pc_offset, 1419 CodeBuffer* code_buffer, 1420 int frame_words, 1421 OopMapSet* oop_map_set, 1422 ExceptionHandlerTable* handler_table, 1423 ImplicitExceptionTable* implicit_exception_table, 1424 AbstractCompiler* compiler, 1425 DebugInformationRecorder* debug_info, 1426 Dependencies* dependencies, 1427 int compile_id, 1428 bool has_unsafe_access, 1429 bool has_wide_vector, 1430 JVMCIObject compiled_code, 1431 JVMCIObject nmethod_mirror, 1432 FailedSpeculation** failed_speculations, 1433 char* speculations, 1434 int speculations_len) { 1435 JVMCI_EXCEPTION_CONTEXT; 1436 nm = NULL; 1437 int comp_level = CompLevel_full_optimization; 1438 char* failure_detail = NULL; 1439 1440 bool install_default = JVMCIENV->get_HotSpotNmethod_isDefault(nmethod_mirror) != 0; 1441 assert(JVMCIENV->isa_HotSpotNmethod(nmethod_mirror), "must be"); 1442 JVMCIObject name = JVMCIENV->get_InstalledCode_name(nmethod_mirror); 1443 const char* nmethod_mirror_name = name.is_null() ? NULL : JVMCIENV->as_utf8_string(name); 1444 int nmethod_mirror_index; 1445 if (!install_default) { 1446 // Reserve or initialize mirror slot in the oops table. 1447 OopRecorder* oop_recorder = debug_info->oop_recorder(); 1448 nmethod_mirror_index = oop_recorder->allocate_oop_index(nmethod_mirror.is_hotspot() ? nmethod_mirror.as_jobject() : NULL); 1449 } else { 1450 // A default HotSpotNmethod mirror is never tracked by the nmethod 1451 nmethod_mirror_index = -1; 1452 } 1453 1454 JVMCI::CodeInstallResult result; 1455 { 1456 // To prevent compile queue updates. 1457 MutexLocker locker(MethodCompileQueue_lock, THREAD); 1458 1459 // Prevent SystemDictionary::add_to_hierarchy from running 1460 // and invalidating our dependencies until we install this method. 1461 MutexLocker ml(Compile_lock); 1462 1463 // Encode the dependencies now, so we can check them right away. 1464 dependencies->encode_content_bytes(); 1465 1466 // Record the dependencies for the current compile in the log 1467 if (LogCompilation) { 1468 for (Dependencies::DepStream deps(dependencies); deps.next(); ) { 1469 deps.log_dependency(); 1470 } 1471 } 1472 1473 // Check for {class loads, evolution, breakpoints} during compilation 1474 result = validate_compile_task_dependencies(dependencies, JVMCIENV->compile_state(), &failure_detail); 1475 if (result != JVMCI::ok) { 1476 // While not a true deoptimization, it is a preemptive decompile. 1477 MethodData* mdp = method()->method_data(); 1478 if (mdp != NULL) { 1479 mdp->inc_decompile_count(); 1480 #ifdef ASSERT 1481 if (mdp->decompile_count() > (uint)PerMethodRecompilationCutoff) { 1482 ResourceMark m; 1483 tty->print_cr("WARN: endless recompilation of %s. Method was set to not compilable.", method()->name_and_sig_as_C_string()); 1484 } 1485 #endif 1486 } 1487 1488 // All buffers in the CodeBuffer are allocated in the CodeCache. 1489 // If the code buffer is created on each compile attempt 1490 // as in C2, then it must be freed. 1491 //code_buffer->free_blob(); 1492 } else { 1493 nm = nmethod::new_nmethod(method, 1494 compile_id, 1495 entry_bci, 1496 offsets, 1497 orig_pc_offset, 1498 debug_info, dependencies, code_buffer, 1499 frame_words, oop_map_set, 1500 handler_table, implicit_exception_table, 1501 compiler, comp_level, 1502 speculations, speculations_len, 1503 nmethod_mirror_index, nmethod_mirror_name, failed_speculations); 1504 1505 1506 // Free codeBlobs 1507 if (nm == NULL) { 1508 // The CodeCache is full. Print out warning and disable compilation. 1509 { 1510 MutexUnlocker ml(Compile_lock); 1511 MutexUnlocker locker(MethodCompileQueue_lock); 1512 CompileBroker::handle_full_code_cache(CodeCache::get_code_blob_type(comp_level)); 1513 } 1514 } else { 1515 nm->set_has_unsafe_access(has_unsafe_access); 1516 nm->set_has_wide_vectors(has_wide_vector); 1517 1518 // Record successful registration. 1519 // (Put nm into the task handle *before* publishing to the Java heap.) 1520 if (JVMCIENV->compile_state() != NULL) { 1521 JVMCIENV->compile_state()->task()->set_code(nm); 1522 } 1523 1524 JVMCINMethodData* data = nm->jvmci_nmethod_data(); 1525 assert(data != NULL, "must be"); 1526 if (install_default) { 1527 assert(!nmethod_mirror.is_hotspot() || data->get_nmethod_mirror(nm) == NULL, "must be"); 1528 if (entry_bci == InvocationEntryBci) { 1529 if (TieredCompilation) { 1530 // If there is an old version we're done with it 1531 CompiledMethod* old = method->code(); 1532 if (TraceMethodReplacement && old != NULL) { 1533 ResourceMark rm; 1534 char *method_name = method->name_and_sig_as_C_string(); 1535 tty->print_cr("Replacing method %s", method_name); 1536 } 1537 if (old != NULL ) { 1538 old->make_not_entrant(); 1539 } 1540 } 1541 if (TraceNMethodInstalls) { 1542 ResourceMark rm; 1543 char *method_name = method->name_and_sig_as_C_string(); 1544 ttyLocker ttyl; 1545 tty->print_cr("Installing method (%d) %s [entry point: %p]", 1546 comp_level, 1547 method_name, nm->entry_point()); 1548 } 1549 // Allow the code to be executed 1550 method->set_code(method, nm); 1551 } else { 1552 if (TraceNMethodInstalls ) { 1553 ResourceMark rm; 1554 char *method_name = method->name_and_sig_as_C_string(); 1555 ttyLocker ttyl; 1556 tty->print_cr("Installing osr method (%d) %s @ %d", 1557 comp_level, 1558 method_name, 1559 entry_bci); 1560 } 1561 InstanceKlass::cast(method->method_holder())->add_osr_nmethod(nm); 1562 } 1563 } else { 1564 assert(!nmethod_mirror.is_hotspot() || data->get_nmethod_mirror(nm) == HotSpotJVMCI::resolve(nmethod_mirror), "must be"); 1565 } 1566 nm->make_in_use(); 1567 } 1568 result = nm != NULL ? JVMCI::ok :JVMCI::cache_full; 1569 } 1570 } 1571 1572 // String creation must be done outside lock 1573 if (failure_detail != NULL) { 1574 // A failure to allocate the string is silently ignored. 1575 JVMCIObject message = JVMCIENV->create_string(failure_detail, JVMCIENV); 1576 JVMCIENV->set_HotSpotCompiledNmethod_installationFailureMessage(compiled_code, message); 1577 } 1578 1579 // JVMTI -- compiled method notification (must be done outside lock) 1580 if (nm != NULL) { 1581 nm->post_compiled_method_load_event(); 1582 } 1583 1584 return result; 1585 }