1 /* 2 * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "jvm.h" 26 #include "asm/codeBuffer.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "code/codeCache.hpp" 29 #include "compiler/compileBroker.hpp" 30 #include "compiler/disassembler.hpp" 31 #include "jvmci/jvmciRuntime.hpp" 32 #include "jvmci/jvmciCompilerToVM.hpp" 33 #include "jvmci/jvmciCompiler.hpp" 34 #include "jvmci/jvmciJavaClasses.hpp" 35 #include "jvmci/jvmciEnv.hpp" 36 #include "logging/log.hpp" 37 #include "memory/oopFactory.hpp" 38 #include "memory/resourceArea.hpp" 39 #include "oops/oop.inline.hpp" 40 #include "oops/objArrayOop.inline.hpp" 41 #include "runtime/biasedLocking.hpp" 42 #include "runtime/interfaceSupport.hpp" 43 #include "runtime/reflection.hpp" 44 #include "runtime/sharedRuntime.hpp" 45 #include "runtime/threadSMR.hpp" 46 #include "utilities/debug.hpp" 47 #include "utilities/defaultStream.hpp" 48 #include "utilities/macros.hpp" 49 50 #if defined(_MSC_VER) 51 #define strtoll _strtoi64 52 #endif 53 54 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL; 55 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false; 56 bool JVMCIRuntime::_well_known_classes_initialized = false; 57 int JVMCIRuntime::_trivial_prefixes_count = 0; 58 char** JVMCIRuntime::_trivial_prefixes = NULL; 59 JVMCIRuntime::CompLevelAdjustment JVMCIRuntime::_comp_level_adjustment = JVMCIRuntime::none; 60 bool JVMCIRuntime::_shutdown_called = false; 61 62 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) { 63 if (kind.is_null()) { 64 THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL); 65 } 66 jchar ch = JavaKind::typeChar(kind); 67 switch(ch) { 68 case 'Z': return T_BOOLEAN; 69 case 'B': return T_BYTE; 70 case 'S': return T_SHORT; 71 case 'C': return T_CHAR; 72 case 'I': return T_INT; 73 case 'F': return T_FLOAT; 74 case 'J': return T_LONG; 75 case 'D': return T_DOUBLE; 76 case 'A': return T_OBJECT; 77 case '-': return T_ILLEGAL; 78 default: 79 JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch); 80 } 81 } 82 83 // Simple helper to see if the caller of a runtime stub which 84 // entered the VM has been deoptimized 85 86 static bool caller_is_deopted() { 87 JavaThread* thread = JavaThread::current(); 88 RegisterMap reg_map(thread, false); 89 frame runtime_frame = thread->last_frame(); 90 frame caller_frame = runtime_frame.sender(®_map); 91 assert(caller_frame.is_compiled_frame(), "must be compiled"); 92 return caller_frame.is_deoptimized_frame(); 93 } 94 95 // Stress deoptimization 96 static void deopt_caller() { 97 if ( !caller_is_deopted()) { 98 JavaThread* thread = JavaThread::current(); 99 RegisterMap reg_map(thread, false); 100 frame runtime_frame = thread->last_frame(); 101 frame caller_frame = runtime_frame.sender(®_map); 102 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); 103 assert(caller_is_deopted(), "Must be deoptimized"); 104 } 105 } 106 107 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass)) 108 JRT_BLOCK; 109 assert(klass->is_klass(), "not a class"); 110 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive 111 InstanceKlass* ik = InstanceKlass::cast(klass); 112 ik->check_valid_for_instantiation(true, CHECK); 113 // make sure klass is initialized 114 ik->initialize(CHECK); 115 // allocate instance and return via TLS 116 oop obj = ik->allocate_instance(CHECK); 117 thread->set_vm_result(obj); 118 JRT_BLOCK_END; 119 120 if (ReduceInitialCardMarks) { 121 new_store_pre_barrier(thread); 122 } 123 JRT_END 124 125 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length)) 126 JRT_BLOCK; 127 // Note: no handle for klass needed since they are not used 128 // anymore after new_objArray() and no GC can happen before. 129 // (This may have to change if this code changes!) 130 assert(array_klass->is_klass(), "not a class"); 131 oop obj; 132 if (array_klass->is_typeArray_klass()) { 133 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type(); 134 obj = oopFactory::new_typeArray(elt_type, length, CHECK); 135 } else { 136 Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive 137 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass(); 138 obj = oopFactory::new_objArray(elem_klass, length, CHECK); 139 } 140 thread->set_vm_result(obj); 141 // This is pretty rare but this runtime patch is stressful to deoptimization 142 // if we deoptimize here so force a deopt to stress the path. 143 if (DeoptimizeALot) { 144 static int deopts = 0; 145 // Alternate between deoptimizing and raising an error (which will also cause a deopt) 146 if (deopts++ % 2 == 0) { 147 ResourceMark rm(THREAD); 148 THROW(vmSymbols::java_lang_OutOfMemoryError()); 149 } else { 150 deopt_caller(); 151 } 152 } 153 JRT_BLOCK_END; 154 155 if (ReduceInitialCardMarks) { 156 new_store_pre_barrier(thread); 157 } 158 JRT_END 159 160 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) { 161 // After any safepoint, just before going back to compiled code, 162 // we inform the GC that we will be doing initializing writes to 163 // this object in the future without emitting card-marks, so 164 // GC may take any compensating steps. 165 // NOTE: Keep this code consistent with GraphKit::store_barrier. 166 167 oop new_obj = thread->vm_result(); 168 if (new_obj == NULL) return; 169 170 assert(Universe::heap()->can_elide_tlab_store_barriers(), 171 "compiler must check this first"); 172 // GC may decide to give back a safer copy of new_obj. 173 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj); 174 thread->set_vm_result(new_obj); 175 } 176 177 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims)) 178 assert(klass->is_klass(), "not a class"); 179 assert(rank >= 1, "rank must be nonzero"); 180 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive 181 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK); 182 thread->set_vm_result(obj); 183 JRT_END 184 185 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length)) 186 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK); 187 thread->set_vm_result(obj); 188 JRT_END 189 190 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror)) 191 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror)); 192 193 if (klass == NULL) { 194 ResourceMark rm(THREAD); 195 THROW(vmSymbols::java_lang_InstantiationException()); 196 } 197 198 // Create new instance (the receiver) 199 klass->check_valid_for_instantiation(false, CHECK); 200 201 // Make sure klass gets initialized 202 klass->initialize(CHECK); 203 204 oop obj = klass->allocate_instance(CHECK); 205 thread->set_vm_result(obj); 206 JRT_END 207 208 extern void vm_exit(int code); 209 210 // Enter this method from compiled code handler below. This is where we transition 211 // to VM mode. This is done as a helper routine so that the method called directly 212 // from compiled code does not have to transition to VM. This allows the entry 213 // method to see if the nmethod that we have just looked up a handler for has 214 // been deoptimized while we were in the vm. This simplifies the assembly code 215 // cpu directories. 216 // 217 // We are entering here from exception stub (via the entry method below) 218 // If there is a compiled exception handler in this method, we will continue there; 219 // otherwise we will unwind the stack and continue at the caller of top frame method 220 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to 221 // control the area where we can allow a safepoint. After we exit the safepoint area we can 222 // check to see if the handler we are going to return is now in a nmethod that has 223 // been deoptimized. If that is the case we return the deopt blob 224 // unpack_with_exception entry instead. This makes life for the exception blob easier 225 // because making that same check and diverting is painful from assembly language. 226 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm)) 227 // Reset method handle flag. 228 thread->set_is_method_handle_return(false); 229 230 Handle exception(thread, ex); 231 cm = CodeCache::find_compiled(pc); 232 assert(cm != NULL, "this is not a compiled method"); 233 // Adjust the pc as needed/ 234 if (cm->is_deopt_pc(pc)) { 235 RegisterMap map(thread, false); 236 frame exception_frame = thread->last_frame().sender(&map); 237 // if the frame isn't deopted then pc must not correspond to the caller of last_frame 238 assert(exception_frame.is_deoptimized_frame(), "must be deopted"); 239 pc = exception_frame.pc(); 240 } 241 #ifdef ASSERT 242 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception"); 243 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 244 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { 245 if (ExitVMOnVerifyError) vm_exit(-1); 246 ShouldNotReachHere(); 247 } 248 #endif 249 250 // Check the stack guard pages and reenable them if necessary and there is 251 // enough space on the stack to do so. Use fast exceptions only if the guard 252 // pages are enabled. 253 bool guard_pages_enabled = thread->stack_guards_enabled(); 254 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); 255 256 if (JvmtiExport::can_post_on_exceptions()) { 257 // To ensure correct notification of exception catches and throws 258 // we have to deoptimize here. If we attempted to notify the 259 // catches and throws during this exception lookup it's possible 260 // we could deoptimize on the way out of the VM and end back in 261 // the interpreter at the throw site. This would result in double 262 // notifications since the interpreter would also notify about 263 // these same catches and throws as it unwound the frame. 264 265 RegisterMap reg_map(thread); 266 frame stub_frame = thread->last_frame(); 267 frame caller_frame = stub_frame.sender(®_map); 268 269 // We don't really want to deoptimize the nmethod itself since we 270 // can actually continue in the exception handler ourselves but I 271 // don't see an easy way to have the desired effect. 272 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); 273 assert(caller_is_deopted(), "Must be deoptimized"); 274 275 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); 276 } 277 278 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions 279 if (guard_pages_enabled) { 280 address fast_continuation = cm->handler_for_exception_and_pc(exception, pc); 281 if (fast_continuation != NULL) { 282 // Set flag if return address is a method handle call site. 283 thread->set_is_method_handle_return(cm->is_method_handle_return(pc)); 284 return fast_continuation; 285 } 286 } 287 288 // If the stack guard pages are enabled, check whether there is a handler in 289 // the current method. Otherwise (guard pages disabled), force an unwind and 290 // skip the exception cache update (i.e., just leave continuation==NULL). 291 address continuation = NULL; 292 if (guard_pages_enabled) { 293 294 // New exception handling mechanism can support inlined methods 295 // with exception handlers since the mappings are from PC to PC 296 297 // debugging support 298 // tracing 299 if (log_is_enabled(Info, exceptions)) { 300 ResourceMark rm; 301 stringStream tempst; 302 tempst.print("compiled method <%s>\n" 303 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT, 304 cm->method()->print_value_string(), p2i(pc), p2i(thread)); 305 Exceptions::log_exception(exception, tempst); 306 } 307 // for AbortVMOnException flag 308 NOT_PRODUCT(Exceptions::debug_check_abort(exception)); 309 310 // Clear out the exception oop and pc since looking up an 311 // exception handler can cause class loading, which might throw an 312 // exception and those fields are expected to be clear during 313 // normal bytecode execution. 314 thread->clear_exception_oop_and_pc(); 315 316 bool recursive_exception = false; 317 continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception); 318 // If an exception was thrown during exception dispatch, the exception oop may have changed 319 thread->set_exception_oop(exception()); 320 thread->set_exception_pc(pc); 321 322 // the exception cache is used only by non-implicit exceptions 323 // Update the exception cache only when there didn't happen 324 // another exception during the computation of the compiled 325 // exception handler. Checking for exception oop equality is not 326 // sufficient because some exceptions are pre-allocated and reused. 327 if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) { 328 cm->add_handler_for_exception_and_pc(exception, pc, continuation); 329 } 330 } 331 332 // Set flag if return address is a method handle call site. 333 thread->set_is_method_handle_return(cm->is_method_handle_return(pc)); 334 335 if (log_is_enabled(Info, exceptions)) { 336 ResourceMark rm; 337 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT 338 " for exception thrown at PC " PTR_FORMAT, 339 p2i(thread), p2i(continuation), p2i(pc)); 340 } 341 342 return continuation; 343 JRT_END 344 345 // Enter this method from compiled code only if there is a Java exception handler 346 // in the method handling the exception. 347 // We are entering here from exception stub. We don't do a normal VM transition here. 348 // We do it in a helper. This is so we can check to see if the nmethod we have just 349 // searched for an exception handler has been deoptimized in the meantime. 350 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) { 351 oop exception = thread->exception_oop(); 352 address pc = thread->exception_pc(); 353 // Still in Java mode 354 DEBUG_ONLY(ResetNoHandleMark rnhm); 355 CompiledMethod* cm = NULL; 356 address continuation = NULL; 357 { 358 // Enter VM mode by calling the helper 359 ResetNoHandleMark rnhm; 360 continuation = exception_handler_for_pc_helper(thread, exception, pc, cm); 361 } 362 // Back in JAVA, use no oops DON'T safepoint 363 364 // Now check to see if the compiled method we were called from is now deoptimized. 365 // If so we must return to the deopt blob and deoptimize the nmethod 366 if (cm != NULL && caller_is_deopted()) { 367 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); 368 } 369 370 assert(continuation != NULL, "no handler found"); 371 return continuation; 372 } 373 374 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock)) 375 IF_TRACE_jvmci_3 { 376 char type[O_BUFLEN]; 377 obj->klass()->name()->as_C_string(type, O_BUFLEN); 378 markOop mark = obj->mark(); 379 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)); 380 tty->flush(); 381 } 382 #ifdef ASSERT 383 if (PrintBiasedLockingStatistics) { 384 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 385 } 386 #endif 387 Handle h_obj(thread, obj); 388 if (UseBiasedLocking) { 389 // Retry fast entry if bias is revoked to avoid unnecessary inflation 390 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); 391 } else { 392 if (JVMCIUseFastLocking) { 393 // When using fast locking, the compiled code has already tried the fast case 394 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD); 395 } else { 396 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD); 397 } 398 } 399 TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj)); 400 JRT_END 401 402 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock)) 403 assert(thread == JavaThread::current(), "threads must correspond"); 404 assert(thread->last_Java_sp(), "last_Java_sp must be set"); 405 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown 406 EXCEPTION_MARK; 407 408 #ifdef DEBUG 409 if (!oopDesc::is_oop(obj)) { 410 ResetNoHandleMark rhm; 411 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null(); 412 if (method != NULL) { 413 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj)); 414 } 415 thread->print_stack_on(tty); 416 assert(false, "invalid lock object pointer dected"); 417 } 418 #endif 419 420 if (JVMCIUseFastLocking) { 421 // When using fast locking, the compiled code has already tried the fast case 422 ObjectSynchronizer::slow_exit(obj, lock, THREAD); 423 } else { 424 ObjectSynchronizer::fast_exit(obj, lock, THREAD); 425 } 426 IF_TRACE_jvmci_3 { 427 char type[O_BUFLEN]; 428 obj->klass()->name()->as_C_string(type, O_BUFLEN); 429 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)); 430 tty->flush(); 431 } 432 JRT_END 433 434 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message)) 435 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK); 436 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message); 437 JRT_END 438 439 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass)) 440 ResourceMark rm(thread); 441 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK); 442 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name()); 443 JRT_END 444 445 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass)) 446 ResourceMark rm(thread); 447 const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass); 448 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK); 449 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message); 450 JRT_END 451 452 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline)) 453 ttyLocker ttyl; 454 455 if (obj == NULL) { 456 tty->print("NULL"); 457 } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) { 458 if (oopDesc::is_oop_or_null(obj, true)) { 459 char buf[O_BUFLEN]; 460 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj)); 461 } else { 462 tty->print(INTPTR_FORMAT, p2i(obj)); 463 } 464 } else { 465 ResourceMark rm; 466 assert(obj != NULL && java_lang_String::is_instance(obj), "must be"); 467 char *buf = java_lang_String::as_utf8_string(obj); 468 tty->print_raw(buf); 469 } 470 if (newline) { 471 tty->cr(); 472 } 473 JRT_END 474 475 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj)) 476 thread->satb_mark_queue().enqueue(obj); 477 JRT_END 478 479 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr)) 480 thread->dirty_card_queue().enqueue(card_addr); 481 JRT_END 482 483 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child)) 484 bool ret = true; 485 if(!Universe::heap()->is_in_closed_subset(parent)) { 486 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent)); 487 parent->print(); 488 ret=false; 489 } 490 if(!Universe::heap()->is_in_closed_subset(child)) { 491 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child)); 492 child->print(); 493 ret=false; 494 } 495 return (jint)ret; 496 JRT_END 497 498 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value)) 499 ResourceMark rm; 500 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where; 501 char *detail_msg = NULL; 502 if (format != 0L) { 503 const char* buf = (char*) (address) format; 504 size_t detail_msg_length = strlen(buf) * 2; 505 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length); 506 jio_snprintf(detail_msg, detail_msg_length, buf, value); 507 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg); 508 } else { 509 report_vm_error(__FILE__, __LINE__, error_msg); 510 } 511 JRT_END 512 513 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread)) 514 oop exception = thread->exception_oop(); 515 assert(exception != NULL, "npe"); 516 thread->set_exception_oop(NULL); 517 thread->set_exception_pc(0); 518 return exception; 519 JRT_END 520 521 PRAGMA_DIAG_PUSH 522 PRAGMA_FORMAT_NONLITERAL_IGNORED 523 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3)) 524 ResourceMark rm; 525 assert(format != NULL && java_lang_String::is_instance(format), "must be"); 526 char *buf = java_lang_String::as_utf8_string(format); 527 tty->print((const char*)buf, v1, v2, v3); 528 JRT_END 529 PRAGMA_DIAG_POP 530 531 static void decipher(jlong v, bool ignoreZero) { 532 if (v != 0 || !ignoreZero) { 533 void* p = (void *)(address) v; 534 CodeBlob* cb = CodeCache::find_blob(p); 535 if (cb) { 536 if (cb->is_nmethod()) { 537 char buf[O_BUFLEN]; 538 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())); 539 return; 540 } 541 cb->print_value_on(tty); 542 return; 543 } 544 if (Universe::heap()->is_in(p)) { 545 oop obj = oop(p); 546 obj->print_value_on(tty); 547 return; 548 } 549 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v); 550 } 551 } 552 553 PRAGMA_DIAG_PUSH 554 PRAGMA_FORMAT_NONLITERAL_IGNORED 555 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3)) 556 ResourceMark rm; 557 const char *buf = (const char*) (address) format; 558 if (vmError) { 559 if (buf != NULL) { 560 fatal(buf, v1, v2, v3); 561 } else { 562 fatal("<anonymous error>"); 563 } 564 } else if (buf != NULL) { 565 tty->print(buf, v1, v2, v3); 566 } else { 567 assert(v2 == 0, "v2 != 0"); 568 assert(v3 == 0, "v3 != 0"); 569 decipher(v1, false); 570 } 571 JRT_END 572 PRAGMA_DIAG_POP 573 574 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline)) 575 union { 576 jlong l; 577 jdouble d; 578 jfloat f; 579 } uu; 580 uu.l = value; 581 switch (typeChar) { 582 case 'Z': tty->print(value == 0 ? "false" : "true"); break; 583 case 'B': tty->print("%d", (jbyte) value); break; 584 case 'C': tty->print("%c", (jchar) value); break; 585 case 'S': tty->print("%d", (jshort) value); break; 586 case 'I': tty->print("%d", (jint) value); break; 587 case 'F': tty->print("%f", uu.f); break; 588 case 'J': tty->print(JLONG_FORMAT, value); break; 589 case 'D': tty->print("%lf", uu.d); break; 590 default: assert(false, "unknown typeChar"); break; 591 } 592 if (newline) { 593 tty->cr(); 594 } 595 JRT_END 596 597 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj)) 598 return (jint) obj->identity_hash(); 599 JRT_END 600 601 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted)) 602 Handle receiverHandle(thread, receiver); 603 // A nested ThreadsListHandle may require the Threads_lock which 604 // requires thread_in_vm which is why this method cannot be JRT_LEAF. 605 ThreadsListHandle tlh; 606 607 JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle()); 608 if (receiverThread == NULL || (EnableThreadSMRExtraValidityChecks && !tlh.includes(receiverThread))) { 609 // The other thread may exit during this process, which is ok so return false. 610 return JNI_FALSE; 611 } else { 612 return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0); 613 } 614 JRT_END 615 616 JRT_ENTRY(int, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value)) 617 deopt_caller(); 618 return value; 619 JRT_END 620 621 void JVMCIRuntime::force_initialization(TRAPS) { 622 JVMCIRuntime::initialize_well_known_classes(CHECK); 623 624 ResourceMark rm; 625 TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK); 626 TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK); 627 Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK); 628 JavaValue result(T_OBJECT); 629 JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK); 630 } 631 632 // private static JVMCIRuntime JVMCI.initializeRuntime() 633 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c)) 634 if (!EnableJVMCI) { 635 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled") 636 } 637 JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL); 638 jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL); 639 return ret; 640 JVM_END 641 642 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) { 643 TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle())); 644 Klass* klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle())); 645 TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle())); 646 TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle())); 647 JavaValue result(T_OBJECT); 648 if (args == NULL) { 649 JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle())); 650 } else { 651 JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle())); 652 } 653 return Handle(THREAD, (oop)result.get_jobject()); 654 } 655 656 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) { 657 guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime"); 658 JVMCIRuntime::initialize_well_known_classes(CHECK); 659 // This should only be called in the context of the JVMCI class being initialized 660 InstanceKlass* klass = SystemDictionary::JVMCI_klass(); 661 guarantee(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD), 662 "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization"); 663 664 Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime", 665 "runtime", 666 "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK); 667 objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result); 668 if (trivial_prefixes != NULL) { 669 char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler); 670 for (int i = 0; i < trivial_prefixes->length(); i++) { 671 oop str = trivial_prefixes->obj_at(i); 672 if (str == NULL) { 673 THROW(vmSymbols::java_lang_NullPointerException()); 674 } else { 675 prefixes[i] = strdup(java_lang_String::as_utf8_string(str)); 676 } 677 } 678 _trivial_prefixes = prefixes; 679 _trivial_prefixes_count = trivial_prefixes->length(); 680 } 681 int adjustment = HotSpotJVMCIRuntime::compilationLevelAdjustment(result); 682 assert(adjustment >= JVMCIRuntime::none && 683 adjustment <= JVMCIRuntime::by_full_signature, 684 "compilation level adjustment out of bounds"); 685 _comp_level_adjustment = (CompLevelAdjustment) adjustment; 686 _HotSpotJVMCIRuntime_initialized = true; 687 _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result); 688 } 689 690 void JVMCIRuntime::initialize_JVMCI(TRAPS) { 691 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) { 692 callStatic("jdk/vm/ci/runtime/JVMCI", 693 "getRuntime", 694 "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK); 695 } 696 assert(_HotSpotJVMCIRuntime_initialized == true, "what?"); 697 } 698 699 bool JVMCIRuntime::can_initialize_JVMCI() { 700 // Initializing JVMCI requires the module system to be initialized past phase 3. 701 // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which 702 // JVMCI initialization requires) isn't usable until after phase 3. Testing 703 // whether the system loader is initialized satisfies all these invariants. 704 if (SystemDictionary::java_system_loader() == NULL) { 705 return false; 706 } 707 assert(Universe::is_module_initialized(), "must be"); 708 return true; 709 } 710 711 void JVMCIRuntime::initialize_well_known_classes(TRAPS) { 712 if (JVMCIRuntime::_well_known_classes_initialized == false) { 713 guarantee(can_initialize_JVMCI(), "VM is not yet sufficiently booted to initialize JVMCI"); 714 SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID; 715 SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK); 716 JVMCIJavaClasses::compute_offsets(CHECK); 717 JVMCIRuntime::_well_known_classes_initialized = true; 718 } 719 } 720 721 void JVMCIRuntime::metadata_do(void f(Metadata*)) { 722 // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in 723 // the SystemDictionary well known classes should ensure the other 724 // classes have already been loaded, so make sure their order in the 725 // table enforces that. 726 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) < 727 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier"); 728 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) < 729 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier"); 730 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) < 731 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier"); 732 733 if (HotSpotJVMCIMetaAccessContext::klass() == NULL || 734 !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) { 735 // Nothing could be registered yet 736 return; 737 } 738 739 // WeakReference<HotSpotJVMCIMetaAccessContext>[] 740 objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts(); 741 if (allContexts == NULL) { 742 return; 743 } 744 745 // These must be loaded at this point but the linking state doesn't matter. 746 assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded"); 747 assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded"); 748 assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded"); 749 750 for (int i = 0; i < allContexts->length(); i++) { 751 oop ref = allContexts->obj_at(i); 752 if (ref != NULL) { 753 oop referent = java_lang_ref_Reference::referent(ref); 754 if (referent != NULL) { 755 // Chunked Object[] with last element pointing to next chunk 756 objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent); 757 while (metadataRoots != NULL) { 758 for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) { 759 oop reference = metadataRoots->obj_at(typeIndex); 760 if (reference == NULL) { 761 continue; 762 } 763 oop metadataRoot = java_lang_ref_Reference::referent(reference); 764 if (metadataRoot == NULL) { 765 continue; 766 } 767 if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) { 768 Method* method = CompilerToVM::asMethod(metadataRoot); 769 f(method); 770 } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) { 771 ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot); 772 f(constantPool); 773 } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) { 774 Klass* klass = CompilerToVM::asKlass(metadataRoot); 775 f(klass); 776 } else { 777 metadataRoot->print(); 778 ShouldNotReachHere(); 779 } 780 } 781 metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1); 782 assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type"); 783 } 784 } 785 } 786 } 787 } 788 789 // private static void CompilerToVM.registerNatives() 790 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass)) 791 if (!EnableJVMCI) { 792 THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled"); 793 } 794 795 #ifdef _LP64 796 #ifndef SPARC 797 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end(); 798 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024; 799 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)"); 800 #endif // !SPARC 801 #else 802 fatal("check TLAB allocation code for address space conflicts"); 803 #endif // _LP64 804 805 JVMCIRuntime::initialize_well_known_classes(CHECK); 806 807 { 808 ThreadToNativeFromVM trans(thread); 809 env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count()); 810 } 811 JVM_END 812 813 void JVMCIRuntime::shutdown(TRAPS) { 814 if (_HotSpotJVMCIRuntime_instance != NULL) { 815 _shutdown_called = true; 816 HandleMark hm(THREAD); 817 Handle receiver = get_HotSpotJVMCIRuntime(CHECK); 818 JavaValue result(T_VOID); 819 JavaCallArguments args; 820 args.push_oop(receiver); 821 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK); 822 } 823 } 824 825 CompLevel JVMCIRuntime::adjust_comp_level_inner(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) { 826 JVMCICompiler* compiler = JVMCICompiler::instance(false, thread); 827 if (compiler != NULL && compiler->is_bootstrapping()) { 828 return level; 829 } 830 if (!is_HotSpotJVMCIRuntime_initialized() || _comp_level_adjustment == JVMCIRuntime::none) { 831 // JVMCI cannot participate in compilation scheduling until 832 // JVMCI is initialized and indicates it wants to participate. 833 return level; 834 } 835 836 #define CHECK_RETURN THREAD); \ 837 if (HAS_PENDING_EXCEPTION) { \ 838 Handle exception(THREAD, PENDING_EXCEPTION); \ 839 CLEAR_PENDING_EXCEPTION; \ 840 \ 841 if (exception->is_a(SystemDictionary::ThreadDeath_klass())) { \ 842 /* In the special case of ThreadDeath, we need to reset the */ \ 843 /* pending async exception so that it is propagated. */ \ 844 thread->set_pending_async_exception(exception()); \ 845 return level; \ 846 } \ 847 tty->print("Uncaught exception while adjusting compilation level: "); \ 848 java_lang_Throwable::print(exception(), tty); \ 849 tty->cr(); \ 850 java_lang_Throwable::print_stack_trace(exception, tty); \ 851 if (HAS_PENDING_EXCEPTION) { \ 852 CLEAR_PENDING_EXCEPTION; \ 853 } \ 854 return level; \ 855 } \ 856 (void)(0 857 858 859 Thread* THREAD = thread; 860 HandleMark hm; 861 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_RETURN); 862 Handle name; 863 Handle sig; 864 if (_comp_level_adjustment == JVMCIRuntime::by_full_signature) { 865 name = java_lang_String::create_from_symbol(method->name(), CHECK_RETURN); 866 sig = java_lang_String::create_from_symbol(method->signature(), CHECK_RETURN); 867 } else { 868 name = Handle(); 869 sig = Handle(); 870 } 871 872 JavaValue result(T_INT); 873 JavaCallArguments args; 874 args.push_oop(receiver); 875 args.push_oop(Handle(THREAD, method->method_holder()->java_mirror())); 876 args.push_oop(name); 877 args.push_oop(sig); 878 args.push_int(is_osr); 879 args.push_int(level); 880 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::adjustCompilationLevel_name(), 881 vmSymbols::adjustCompilationLevel_signature(), &args, CHECK_RETURN); 882 883 int comp_level = result.get_jint(); 884 if (comp_level < CompLevel_none || comp_level > CompLevel_full_optimization) { 885 assert(false, "compilation level out of bounds"); 886 return level; 887 } 888 return (CompLevel) comp_level; 889 #undef CHECK_RETURN 890 } 891 892 void JVMCIRuntime::bootstrap_finished(TRAPS) { 893 HandleMark hm(THREAD); 894 Handle receiver = get_HotSpotJVMCIRuntime(CHECK); 895 JavaValue result(T_VOID); 896 JavaCallArguments args; 897 args.push_oop(receiver); 898 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::bootstrapFinished_method_name(), vmSymbols::void_method_signature(), &args, CHECK); 899 } 900 901 bool JVMCIRuntime::treat_as_trivial(Method* method) { 902 if (_HotSpotJVMCIRuntime_initialized) { 903 for (int i = 0; i < _trivial_prefixes_count; i++) { 904 if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) { 905 return true; 906 } 907 } 908 } 909 return false; 910 }