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