1 /* 2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "ci/ciConstant.hpp" 27 #include "ci/ciEnv.hpp" 28 #include "ci/ciField.hpp" 29 #include "ci/ciInlineKlass.hpp" 30 #include "ci/ciInstance.hpp" 31 #include "ci/ciInstanceKlass.hpp" 32 #include "ci/ciMethod.hpp" 33 #include "ci/ciNullObject.hpp" 34 #include "ci/ciReplay.hpp" 35 #include "ci/ciSymbols.hpp" 36 #include "ci/ciUtilities.inline.hpp" 37 #include "classfile/javaClasses.hpp" 38 #include "classfile/javaClasses.inline.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/codeCache.hpp" 43 #include "code/scopeDesc.hpp" 44 #include "compiler/compilationLog.hpp" 45 #include "compiler/compilationPolicy.hpp" 46 #include "compiler/compileBroker.hpp" 47 #include "compiler/compilerEvent.hpp" 48 #include "compiler/compileLog.hpp" 49 #include "compiler/compileTask.hpp" 50 #include "compiler/disassembler.hpp" 51 #include "gc/shared/collectedHeap.inline.hpp" 52 #include "interpreter/bytecodeStream.hpp" 53 #include "interpreter/linkResolver.hpp" 54 #include "jfr/jfrEvents.hpp" 55 #include "jvm.h" 56 #include "logging/log.hpp" 57 #include "memory/allocation.inline.hpp" 58 #include "memory/oopFactory.hpp" 59 #include "memory/resourceArea.hpp" 60 #include "memory/universe.hpp" 61 #include "oops/constantPool.inline.hpp" 62 #include "oops/cpCache.inline.hpp" 63 #include "oops/method.inline.hpp" 64 #include "oops/methodData.hpp" 65 #include "oops/objArrayKlass.hpp" 66 #include "oops/objArrayOop.inline.hpp" 67 #include "oops/oop.inline.hpp" 68 #include "oops/resolvedIndyEntry.hpp" 69 #include "oops/symbolHandle.hpp" 70 #include "prims/jvmtiExport.hpp" 71 #include "prims/methodHandles.hpp" 72 #include "runtime/fieldDescriptor.inline.hpp" 73 #include "runtime/handles.inline.hpp" 74 #include "runtime/init.hpp" 75 #include "runtime/javaThread.hpp" 76 #include "runtime/jniHandles.inline.hpp" 77 #include "runtime/reflection.hpp" 78 #include "runtime/safepointVerifiers.hpp" 79 #include "runtime/sharedRuntime.hpp" 80 #include "utilities/dtrace.hpp" 81 #include "utilities/macros.hpp" 82 #ifdef COMPILER1 83 #include "c1/c1_Runtime1.hpp" 84 #endif 85 #ifdef COMPILER2 86 #include "opto/runtime.hpp" 87 #endif 88 89 // ciEnv 90 // 91 // This class is the top level broker for requests from the compiler 92 // to the VM. 93 94 ciObject* ciEnv::_null_object_instance; 95 96 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr; 97 VM_CLASSES_DO(VM_CLASS_DEFN) 98 #undef VM_CLASS_DEFN 99 100 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr; 101 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr; 102 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr; 103 104 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = nullptr; 105 jobject ciEnv::_ArrayStoreException_handle = nullptr; 106 jobject ciEnv::_ClassCastException_handle = nullptr; 107 108 #ifndef PRODUCT 109 static bool firstEnv = true; 110 #endif /* PRODUCT */ 111 112 // ------------------------------------------------------------------ 113 // ciEnv::ciEnv 114 ciEnv::ciEnv(CompileTask* task) 115 : _ciEnv_arena(mtCompiler) { 116 VM_ENTRY_MARK; 117 118 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. 119 thread->set_env(this); 120 assert(ciEnv::current() == this, "sanity"); 121 122 _oop_recorder = nullptr; 123 _debug_info = nullptr; 124 _dependencies = nullptr; 125 _failure_reason = nullptr; 126 _inc_decompile_count_on_failure = true; 127 _compilable = MethodCompilable; 128 _break_at_compile = false; 129 _compiler_data = nullptr; 130 #ifndef PRODUCT 131 assert(!firstEnv, "not initialized properly"); 132 #endif /* !PRODUCT */ 133 134 _num_inlined_bytecodes = 0; 135 assert(task == nullptr || thread->task() == task, "sanity"); 136 if (task != nullptr) { 137 task->mark_started(os::elapsed_counter()); 138 } 139 _task = task; 140 _log = nullptr; 141 142 // Temporary buffer for creating symbols and such. 143 _name_buffer = nullptr; 144 _name_buffer_len = 0; 145 146 _arena = &_ciEnv_arena; 147 _factory = new (_arena) ciObjectFactory(_arena, 128); 148 149 // Preload commonly referenced system ciObjects. 150 151 // During VM initialization, these instances have not yet been created. 152 // Assertions ensure that these instances are not accessed before 153 // their initialization. 154 155 assert(Universe::is_fully_initialized(), "should be complete"); 156 157 oop o = Universe::null_ptr_exception_instance(); 158 assert(o != nullptr, "should have been initialized"); 159 _NullPointerException_instance = get_object(o)->as_instance(); 160 o = Universe::arithmetic_exception_instance(); 161 assert(o != nullptr, "should have been initialized"); 162 _ArithmeticException_instance = get_object(o)->as_instance(); 163 164 _ArrayIndexOutOfBoundsException_instance = nullptr; 165 _ArrayStoreException_instance = nullptr; 166 _ClassCastException_instance = nullptr; 167 _the_null_string = nullptr; 168 _the_min_jint_string = nullptr; 169 170 _jvmti_redefinition_count = 0; 171 _jvmti_can_hotswap_or_post_breakpoint = false; 172 _jvmti_can_access_local_variables = false; 173 _jvmti_can_post_on_exceptions = false; 174 _jvmti_can_pop_frame = false; 175 176 _dyno_klasses = nullptr; 177 _dyno_locs = nullptr; 178 _dyno_name[0] = '\0'; 179 } 180 181 // Record components of a location descriptor string. Components are appended by the constructor and 182 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to 183 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class. 184 // 185 // Example use: 186 // 187 // { 188 // RecordLocation fp(this, "field1"); 189 // // location: "field1" 190 // { RecordLocation fp(this, " field2"); // location: "field1 field2" } 191 // // location: "field1" 192 // { RecordLocation fp(this, " field3"); // location: "field1 field3" } 193 // // location: "field1" 194 // } 195 // // location: "" 196 // 197 // Examples of actual locations 198 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ; 199 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix 200 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ; 201 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix 202 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ; 203 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle 204 class RecordLocation { 205 private: 206 char* end; 207 208 ATTRIBUTE_PRINTF(3, 4) 209 void push(ciEnv* ci, const char* fmt, ...) { 210 va_list args; 211 va_start(args, fmt); 212 push_va(ci, fmt, args); 213 va_end(args); 214 } 215 216 public: 217 ATTRIBUTE_PRINTF(3, 0) 218 void push_va(ciEnv* ci, const char* fmt, va_list args) { 219 char *e = ci->_dyno_name + strlen(ci->_dyno_name); 220 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1; 221 os::vsnprintf(e, m - e, fmt, args); 222 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow"); 223 } 224 225 // append a new component 226 ATTRIBUTE_PRINTF(3, 4) 227 RecordLocation(ciEnv* ci, const char* fmt, ...) { 228 end = ci->_dyno_name + strlen(ci->_dyno_name); 229 va_list args; 230 va_start(args, fmt); 231 push(ci, " "); 232 push_va(ci, fmt, args); 233 va_end(args); 234 } 235 236 // reset to previous state 237 ~RecordLocation() { 238 *end = '\0'; 239 } 240 }; 241 242 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) { 243 ASSERT_IN_VM; 244 245 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. 246 CompilerThread* current_thread = CompilerThread::current(); 247 assert(current_thread->env() == nullptr, "must be"); 248 current_thread->set_env(this); 249 assert(ciEnv::current() == this, "sanity"); 250 251 _oop_recorder = nullptr; 252 _debug_info = nullptr; 253 _dependencies = nullptr; 254 _failure_reason = nullptr; 255 _inc_decompile_count_on_failure = true; 256 _compilable = MethodCompilable_never; 257 _break_at_compile = false; 258 _compiler_data = nullptr; 259 #ifndef PRODUCT 260 assert(firstEnv, "must be first"); 261 firstEnv = false; 262 #endif /* !PRODUCT */ 263 264 _num_inlined_bytecodes = 0; 265 _task = nullptr; 266 _log = nullptr; 267 268 // Temporary buffer for creating symbols and such. 269 _name_buffer = nullptr; 270 _name_buffer_len = 0; 271 272 _arena = arena; 273 _factory = new (_arena) ciObjectFactory(_arena, 128); 274 275 // Preload commonly referenced system ciObjects. 276 277 // During VM initialization, these instances have not yet been created. 278 // Assertions ensure that these instances are not accessed before 279 // their initialization. 280 281 assert(Universe::is_fully_initialized(), "must be"); 282 283 _NullPointerException_instance = nullptr; 284 _ArithmeticException_instance = nullptr; 285 _ArrayIndexOutOfBoundsException_instance = nullptr; 286 _ArrayStoreException_instance = nullptr; 287 _ClassCastException_instance = nullptr; 288 _the_null_string = nullptr; 289 _the_min_jint_string = nullptr; 290 291 _jvmti_redefinition_count = 0; 292 _jvmti_can_hotswap_or_post_breakpoint = false; 293 _jvmti_can_access_local_variables = false; 294 _jvmti_can_post_on_exceptions = false; 295 _jvmti_can_pop_frame = false; 296 297 _dyno_klasses = nullptr; 298 _dyno_locs = nullptr; 299 } 300 301 ciEnv::~ciEnv() { 302 GUARDED_VM_ENTRY( 303 CompilerThread* current_thread = CompilerThread::current(); 304 _factory->remove_symbols(); 305 // Need safepoint to clear the env on the thread. RedefineClasses might 306 // be reading it. 307 current_thread->set_env(nullptr); 308 ) 309 } 310 311 // ------------------------------------------------------------------ 312 // Cache Jvmti state 313 bool ciEnv::cache_jvmti_state() { 314 VM_ENTRY_MARK; 315 // Get Jvmti capabilities under lock to get consistent values. 316 MutexLocker mu(JvmtiThreadState_lock); 317 _jvmti_redefinition_count = JvmtiExport::redefinition_count(); 318 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint(); 319 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables(); 320 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions(); 321 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame(); 322 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info(); 323 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space(); 324 return _task != nullptr && _task->method()->is_old(); 325 } 326 327 bool ciEnv::jvmti_state_changed() const { 328 // Some classes were redefined 329 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) { 330 return true; 331 } 332 333 if (!_jvmti_can_access_local_variables && 334 JvmtiExport::can_access_local_variables()) { 335 return true; 336 } 337 if (!_jvmti_can_hotswap_or_post_breakpoint && 338 JvmtiExport::can_hotswap_or_post_breakpoint()) { 339 return true; 340 } 341 if (!_jvmti_can_post_on_exceptions && 342 JvmtiExport::can_post_on_exceptions()) { 343 return true; 344 } 345 if (!_jvmti_can_pop_frame && 346 JvmtiExport::can_pop_frame()) { 347 return true; 348 } 349 if (!_jvmti_can_get_owned_monitor_info && 350 JvmtiExport::can_get_owned_monitor_info()) { 351 return true; 352 } 353 if (!_jvmti_can_walk_any_space && 354 JvmtiExport::can_walk_any_space()) { 355 return true; 356 } 357 358 return false; 359 } 360 361 // ------------------------------------------------------------------ 362 // Cache DTrace flags 363 void ciEnv::cache_dtrace_flags() { 364 // Need lock? 365 _dtrace_method_probes = DTraceMethodProbes; 366 _dtrace_alloc_probes = DTraceAllocProbes; 367 } 368 369 // ------------------------------------------------------------------ 370 // helper for lazy exception creation 371 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) { 372 VM_ENTRY_MARK; 373 if (handle == nullptr) { 374 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance. 375 InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle()); 376 jobject objh = nullptr; 377 if (ik != nullptr) { 378 oop obj = ik->allocate_instance(THREAD); 379 if (!HAS_PENDING_EXCEPTION) 380 objh = JNIHandles::make_global(Handle(THREAD, obj)); 381 } 382 if (HAS_PENDING_EXCEPTION) { 383 CLEAR_PENDING_EXCEPTION; 384 } else { 385 handle = objh; 386 } 387 } 388 oop obj = JNIHandles::resolve(handle); 389 return obj == nullptr? nullptr: get_object(obj)->as_instance(); 390 } 391 392 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) { 393 switch (type) { 394 case T_BOOLEAN: return Boolean_klass(); 395 case T_BYTE : return Byte_klass(); 396 case T_CHAR : return Character_klass(); 397 case T_SHORT : return Short_klass(); 398 case T_INT : return Integer_klass(); 399 case T_LONG : return Long_klass(); 400 case T_FLOAT : return Float_klass(); 401 case T_DOUBLE : return Double_klass(); 402 403 default: 404 assert(false, "not a primitive: %s", type2name(type)); 405 return nullptr; 406 } 407 } 408 409 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() { 410 if (_ArrayIndexOutOfBoundsException_instance == nullptr) { 411 _ArrayIndexOutOfBoundsException_instance 412 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle, 413 vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 414 } 415 return _ArrayIndexOutOfBoundsException_instance; 416 } 417 ciInstance* ciEnv::ArrayStoreException_instance() { 418 if (_ArrayStoreException_instance == nullptr) { 419 _ArrayStoreException_instance 420 = get_or_create_exception(_ArrayStoreException_handle, 421 vmSymbols::java_lang_ArrayStoreException()); 422 } 423 return _ArrayStoreException_instance; 424 } 425 ciInstance* ciEnv::ClassCastException_instance() { 426 if (_ClassCastException_instance == nullptr) { 427 _ClassCastException_instance 428 = get_or_create_exception(_ClassCastException_handle, 429 vmSymbols::java_lang_ClassCastException()); 430 } 431 return _ClassCastException_instance; 432 } 433 434 ciInstance* ciEnv::the_null_string() { 435 if (_the_null_string == nullptr) { 436 VM_ENTRY_MARK; 437 _the_null_string = get_object(Universe::the_null_string())->as_instance(); 438 } 439 return _the_null_string; 440 } 441 442 ciInstance* ciEnv::the_min_jint_string() { 443 if (_the_min_jint_string == nullptr) { 444 VM_ENTRY_MARK; 445 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance(); 446 } 447 return _the_min_jint_string; 448 } 449 450 // ------------------------------------------------------------------ 451 // ciEnv::get_method_from_handle 452 ciMethod* ciEnv::get_method_from_handle(Method* method) { 453 VM_ENTRY_MARK; 454 return get_metadata(method)->as_method(); 455 } 456 457 // ------------------------------------------------------------------ 458 // ciEnv::check_klass_accessiblity 459 // 460 // Note: the logic of this method should mirror the logic of 461 // ConstantPool::verify_constant_pool_resolve. 462 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass, 463 Klass* resolved_klass) { 464 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) { 465 return true; 466 } 467 if (accessing_klass->is_obj_array_klass()) { 468 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass(); 469 } 470 if (!accessing_klass->is_instance_klass()) { 471 return true; 472 } 473 474 if (resolved_klass->is_objArray_klass()) { 475 // Find the element klass, if this is an array. 476 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass(); 477 } 478 if (resolved_klass->is_instance_klass()) { 479 return (Reflection::verify_class_access(accessing_klass->get_Klass(), 480 InstanceKlass::cast(resolved_klass), 481 true) == Reflection::ACCESS_OK); 482 } 483 return true; 484 } 485 486 // ------------------------------------------------------------------ 487 // ciEnv::get_klass_by_name_impl 488 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass, 489 const constantPoolHandle& cpool, 490 ciSymbol* name, 491 bool require_local) { 492 ASSERT_IN_VM; 493 Thread* current = Thread::current(); 494 495 // Now we need to check the SystemDictionary 496 Symbol* sym = name->get_symbol(); 497 if (Signature::has_envelope(sym)) { 498 // This is a name from a signature. Strip off the trimmings. 499 // Call recursive to keep scope of strippedsym. 500 TempNewSymbol strippedsym = Signature::strip_envelope(sym); 501 ciSymbol* strippedname = get_symbol(strippedsym); 502 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local); 503 } 504 505 // Check for prior unloaded klass. The SystemDictionary's answers 506 // can vary over time but the compiler needs consistency. 507 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name); 508 if (unloaded_klass != nullptr) { 509 if (require_local) return nullptr; 510 return unloaded_klass; 511 } 512 513 Handle loader; 514 Handle domain; 515 if (accessing_klass != nullptr) { 516 loader = Handle(current, accessing_klass->loader()); 517 domain = Handle(current, accessing_klass->protection_domain()); 518 } 519 520 Klass* found_klass = require_local ? 521 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) : 522 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader); 523 524 // If we fail to find an array klass, look again for its element type. 525 // The element type may be available either locally or via constraints. 526 // In either case, if we can find the element type in the system dictionary, 527 // we must build an array type around it. The CI requires array klasses 528 // to be loaded if their element klasses are loaded, except when memory 529 // is exhausted. 530 if (Signature::is_array(sym) && 531 (sym->char_at(1) == JVM_SIGNATURE_ARRAY || 532 sym->char_at(1) == JVM_SIGNATURE_CLASS || 533 sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT )) { 534 // We have an unloaded array. 535 // Build it on the fly if the element class exists. 536 SignatureStream ss(sym, false); 537 ss.skip_array_prefix(1); 538 // Get element ciKlass recursively. 539 ciKlass* elem_klass = 540 get_klass_by_name_impl(accessing_klass, 541 cpool, 542 get_symbol(ss.as_symbol()), 543 require_local); 544 if (elem_klass != nullptr && elem_klass->is_loaded()) { 545 // Now make an array for it 546 bool null_free_array = sym->is_Q_array_signature() && sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT; 547 return ciArrayKlass::make(elem_klass, null_free_array); 548 } 549 } 550 551 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) { 552 // Look inside the constant pool for pre-resolved class entries. 553 for (int i = cpool->length() - 1; i >= 1; i--) { 554 if (cpool->tag_at(i).is_klass()) { 555 Klass* kls = cpool->resolved_klass_at(i); 556 if (kls->name() == sym) { 557 found_klass = kls; 558 break; 559 } 560 } 561 } 562 } 563 564 if (found_klass != nullptr) { 565 // Found it. Build a CI handle. 566 return get_klass(found_klass); 567 } 568 569 if (require_local) return nullptr; 570 571 // Not yet loaded into the VM, or not governed by loader constraints. 572 // Make a CI representative for it. 573 int i = 0; 574 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) { 575 i++; 576 } 577 if (i > 0 && sym->char_at(i) == JVM_SIGNATURE_PRIMITIVE_OBJECT) { 578 // An unloaded array class of inline types is an ObjArrayKlass, an 579 // unloaded inline type class is an InstanceKlass. For consistency, 580 // make the signature of the unloaded array of inline type use L 581 // rather than Q. 582 char* new_name = name_buffer(sym->utf8_length()+1); 583 strncpy(new_name, (char*)sym->base(), sym->utf8_length()); 584 new_name[i] = JVM_SIGNATURE_CLASS; 585 new_name[sym->utf8_length()] = '\0'; 586 return get_unloaded_klass(accessing_klass, ciSymbol::make(new_name)); 587 } 588 return get_unloaded_klass(accessing_klass, name); 589 } 590 591 // ------------------------------------------------------------------ 592 // ciEnv::get_klass_by_name 593 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass, 594 ciSymbol* klass_name, 595 bool require_local) { 596 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass, 597 constantPoolHandle(), 598 klass_name, 599 require_local);) 600 } 601 602 // ------------------------------------------------------------------ 603 // ciEnv::get_klass_by_index_impl 604 // 605 // Implementation of get_klass_by_index. 606 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool, 607 int index, 608 bool& is_accessible, 609 ciInstanceKlass* accessor) { 610 Klass* klass = nullptr; 611 Symbol* klass_name = nullptr; 612 613 if (cpool->tag_at(index).is_symbol()) { 614 klass_name = cpool->symbol_at(index); 615 } else { 616 // Check if it's resolved if it's not a symbol constant pool entry. 617 klass = ConstantPool::klass_at_if_loaded(cpool, index); 618 // Try to look it up by name. 619 if (klass == nullptr) { 620 klass_name = cpool->klass_name_at(index); 621 } 622 } 623 624 if (klass == nullptr) { 625 // Not found in constant pool. Use the name to do the lookup. 626 ciKlass* k = get_klass_by_name_impl(accessor, 627 cpool, 628 get_symbol(klass_name), 629 false); 630 // Calculate accessibility the hard way. 631 if (!k->is_loaded()) { 632 is_accessible = false; 633 } else if (k->loader() != accessor->loader() && 634 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) { 635 // Loaded only remotely. Not linked yet. 636 is_accessible = false; 637 } else { 638 // Linked locally, and we must also check public/private, etc. 639 is_accessible = check_klass_accessibility(accessor, k->get_Klass()); 640 } 641 return k; 642 } 643 644 // Check for prior unloaded klass. The SystemDictionary's answers 645 // can vary over time but the compiler needs consistency. 646 ciSymbol* name = get_symbol(klass->name()); 647 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name); 648 if (unloaded_klass != nullptr) { 649 is_accessible = false; 650 return unloaded_klass; 651 } 652 653 // It is known to be accessible, since it was found in the constant pool. 654 ciKlass* ciKlass = get_klass(klass); 655 is_accessible = true; 656 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) { 657 // Klass was unresolved at replay dump time and therefore not accessible. 658 is_accessible = false; 659 } 660 return ciKlass; 661 } 662 663 // ------------------------------------------------------------------ 664 // ciEnv::get_klass_by_index 665 // 666 // Get a klass from the constant pool. 667 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool, 668 int index, 669 bool& is_accessible, 670 ciInstanceKlass* accessor) { 671 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);) 672 } 673 674 // ------------------------------------------------------------------ 675 // ciEnv::is_inline_klass 676 // 677 // Check if the klass is an inline klass. 678 bool ciEnv::has_Q_signature(const constantPoolHandle& cpool, int index) { 679 GUARDED_VM_ENTRY(return cpool->klass_name_at(index)->is_Q_signature();) 680 } 681 682 // ------------------------------------------------------------------ 683 // ciEnv::unbox_primitive_value 684 // 685 // Unbox a primitive and return it as a ciConstant. 686 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) { 687 jvalue value; 688 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value); 689 if (bt != expected_bt && expected_bt != T_ILLEGAL) { 690 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name()); 691 return ciConstant(); 692 } 693 switch (bt) { 694 case T_BOOLEAN: return ciConstant(bt, value.z); 695 case T_BYTE: return ciConstant(bt, value.b); 696 case T_SHORT: return ciConstant(bt, value.s); 697 case T_CHAR: return ciConstant(bt, value.c); 698 case T_INT: return ciConstant(bt, value.i); 699 case T_LONG: return ciConstant(value.j); 700 case T_FLOAT: return ciConstant(value.f); 701 case T_DOUBLE: return ciConstant(value.d); 702 703 default: 704 assert(false, "not a primitive type: %s", type2name(bt)); 705 return ciConstant(); 706 } 707 } 708 709 // ------------------------------------------------------------------ 710 // ciEnv::get_resolved_constant 711 // 712 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) { 713 assert(obj_index >= 0, ""); 714 oop obj = cpool->resolved_reference_at(obj_index); 715 if (obj == nullptr) { 716 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference. 717 // Null constant is represented as a sentinel (non-null) value. 718 return ciConstant(); 719 } else if (obj == Universe::the_null_sentinel()) { 720 return ciConstant(T_OBJECT, get_object(nullptr)); 721 } else { 722 ciObject* ciobj = get_object(obj); 723 if (ciobj->is_array()) { 724 return ciConstant(T_ARRAY, ciobj); 725 } else { 726 int cp_index = cpool->object_to_cp_index(obj_index); 727 BasicType bt = cpool->basic_type_for_constant_at(cp_index); 728 if (is_java_primitive(bt)) { 729 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity"); 730 return unbox_primitive_value(ciobj, bt); 731 } else { 732 assert(ciobj->is_instance(), "should be an instance"); 733 return ciConstant(T_OBJECT, ciobj); 734 } 735 } 736 } 737 } 738 739 // ------------------------------------------------------------------ 740 // ciEnv::get_constant_by_index_impl 741 // 742 // Implementation of get_constant_by_index(). 743 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool, 744 int index, int obj_index, 745 ciInstanceKlass* accessor) { 746 if (obj_index >= 0) { 747 ciConstant con = get_resolved_constant(cpool, obj_index); 748 if (con.is_valid()) { 749 return con; 750 } 751 } 752 constantTag tag = cpool->tag_at(index); 753 if (tag.is_int()) { 754 return ciConstant(T_INT, (jint)cpool->int_at(index)); 755 } else if (tag.is_long()) { 756 return ciConstant((jlong)cpool->long_at(index)); 757 } else if (tag.is_float()) { 758 return ciConstant((jfloat)cpool->float_at(index)); 759 } else if (tag.is_double()) { 760 return ciConstant((jdouble)cpool->double_at(index)); 761 } else if (tag.is_string()) { 762 EXCEPTION_CONTEXT; 763 assert(obj_index >= 0, "should have an object index"); 764 oop string = cpool->string_at(index, obj_index, THREAD); 765 if (HAS_PENDING_EXCEPTION) { 766 CLEAR_PENDING_EXCEPTION; 767 record_out_of_memory_failure(); 768 return ciConstant(); 769 } 770 ciInstance* constant = get_object(string)->as_instance(); 771 return ciConstant(T_OBJECT, constant); 772 } else if (tag.is_unresolved_klass_in_error()) { 773 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr)); 774 } else if (tag.is_klass() || tag.is_unresolved_klass()) { 775 bool will_link; 776 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor); 777 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass)); 778 if (klass->is_loaded() && tag.is_Qdescriptor_klass()) { 779 return ciConstant(T_OBJECT, klass->as_inline_klass()->val_mirror()); 780 } else { 781 return ciConstant(T_OBJECT, mirror); 782 } 783 } else if (tag.is_method_type() || tag.is_method_type_in_error()) { 784 // must execute Java code to link this CP entry into cache[i].f1 785 assert(obj_index >= 0, "should have an object index"); 786 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index)); 787 ciObject* ciobj = get_unloaded_method_type_constant(signature); 788 return ciConstant(T_OBJECT, ciobj); 789 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) { 790 // must execute Java code to link this CP entry into cache[i].f1 791 assert(obj_index >= 0, "should have an object index"); 792 bool ignore_will_link; 793 int ref_kind = cpool->method_handle_ref_kind_at(index); 794 int callee_index = cpool->method_handle_klass_index_at(index); 795 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor); 796 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index)); 797 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index)); 798 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind); 799 return ciConstant(T_OBJECT, ciobj); 800 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) { 801 assert(obj_index >= 0, "should have an object index"); 802 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant 803 } else { 804 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name()); 805 return ciConstant(); 806 } 807 } 808 809 // ------------------------------------------------------------------ 810 // ciEnv::get_constant_by_index 811 // 812 // Pull a constant out of the constant pool. How appropriate. 813 // 814 // Implementation note: this query is currently in no way cached. 815 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool, 816 int pool_index, int cache_index, 817 ciInstanceKlass* accessor) { 818 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);) 819 } 820 821 // ------------------------------------------------------------------ 822 // ciEnv::get_field_by_index_impl 823 // 824 // Implementation of get_field_by_index. 825 // 826 // Implementation note: the results of field lookups are cached 827 // in the accessor klass. 828 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor, 829 int index, Bytecodes::Code bc) { 830 ciConstantPoolCache* cache = accessor->field_cache(); 831 if (cache == nullptr) { 832 ciField* field = new (arena()) ciField(accessor, index, bc); 833 return field; 834 } else { 835 ciField* field = (ciField*)cache->get(index); 836 if (field == nullptr) { 837 field = new (arena()) ciField(accessor, index, bc); 838 cache->insert(index, field); 839 } 840 return field; 841 } 842 } 843 844 // ------------------------------------------------------------------ 845 // ciEnv::get_field_by_index 846 // 847 // Get a field by index from a klass's constant pool. 848 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor, 849 int index, Bytecodes::Code bc) { 850 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);) 851 } 852 853 // ------------------------------------------------------------------ 854 // ciEnv::lookup_method 855 // 856 // Perform an appropriate method lookup based on accessor, holder, 857 // name, signature, and bytecode. 858 Method* ciEnv::lookup_method(ciInstanceKlass* accessor, 859 ciKlass* holder, 860 Symbol* name, 861 Symbol* sig, 862 Bytecodes::Code bc, 863 constantTag tag) { 864 InstanceKlass* accessor_klass = accessor->get_instanceKlass(); 865 Klass* holder_klass = holder->get_Klass(); 866 867 // Accessibility checks are performed in ciEnv::get_method_by_index_impl. 868 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible"); 869 870 LinkInfo link_info(holder_klass, name, sig, accessor_klass, 871 LinkInfo::AccessCheck::required, 872 LinkInfo::LoaderConstraintCheck::required, 873 tag); 874 switch (bc) { 875 case Bytecodes::_invokestatic: 876 return LinkResolver::resolve_static_call_or_null(link_info); 877 case Bytecodes::_invokespecial: 878 return LinkResolver::resolve_special_call_or_null(link_info); 879 case Bytecodes::_invokeinterface: 880 return LinkResolver::linktime_resolve_interface_method_or_null(link_info); 881 case Bytecodes::_invokevirtual: 882 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info); 883 default: 884 fatal("Unhandled bytecode: %s", Bytecodes::name(bc)); 885 return nullptr; // silence compiler warnings 886 } 887 } 888 889 890 // ------------------------------------------------------------------ 891 // ciEnv::get_method_by_index_impl 892 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool, 893 int index, Bytecodes::Code bc, 894 ciInstanceKlass* accessor) { 895 assert(cpool.not_null(), "need constant pool"); 896 assert(accessor != nullptr, "need origin of access"); 897 if (bc == Bytecodes::_invokedynamic) { 898 // FIXME: code generation could allow for null (unlinked) call site 899 // The call site could be made patchable as follows: 900 // Load the appendix argument from the constant pool. 901 // Test the appendix argument and jump to a known deopt routine if it is null. 902 // Jump through a patchable call site, which is initially a deopt routine. 903 // Patch the call site to the nmethod entry point of the static compiled lambda form. 904 // As with other two-component call sites, both values must be independently verified. 905 int indy_index = cpool->decode_invokedynamic_index(index); 906 assert (indy_index >= 0, "should be"); 907 assert(indy_index < cpool->cache()->resolved_indy_entries_length(), "impossible"); 908 Method* adapter = cpool->resolved_indy_entry_at(indy_index)->method(); 909 // Resolved if the adapter is non null. 910 if (adapter != nullptr) { 911 return get_method(adapter); 912 } 913 914 // Fake a method that is equivalent to a declared method. 915 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass()); 916 ciSymbol* name = ciSymbols::invokeBasic_name(); 917 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc)); 918 return get_unloaded_method(holder, name, signature, accessor); 919 } else { 920 const int holder_index = cpool->klass_ref_index_at(index, bc); 921 bool holder_is_accessible; 922 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor); 923 924 // Get the method's name and signature. 925 Symbol* name_sym = cpool->name_ref_at(index, bc); 926 Symbol* sig_sym = cpool->signature_ref_at(index, bc); 927 928 if (cpool->has_preresolution() 929 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) && 930 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) { 931 // Short-circuit lookups for JSR 292-related call sites. 932 // That is, do not rely only on name-based lookups, because they may fail 933 // if the names are not resolvable in the boot class loader (7056328). 934 switch (bc) { 935 case Bytecodes::_invokevirtual: 936 case Bytecodes::_invokeinterface: 937 case Bytecodes::_invokespecial: 938 case Bytecodes::_invokestatic: 939 { 940 Method* m = ConstantPool::method_at_if_loaded(cpool, index); 941 if (m != nullptr) { 942 return get_method(m); 943 } 944 } 945 break; 946 default: 947 break; 948 } 949 } 950 951 if (holder_is_accessible) { // Our declared holder is loaded. 952 constantTag tag = cpool->tag_ref_at(index, bc); 953 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?"); 954 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag); 955 if (m != nullptr && 956 (bc == Bytecodes::_invokestatic 957 ? m->method_holder()->is_not_initialized() 958 : !m->method_holder()->is_loaded())) { 959 m = nullptr; 960 } 961 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) { 962 m = nullptr; 963 } 964 if (m != nullptr) { 965 // We found the method. 966 return get_method(m); 967 } 968 } 969 970 // Either the declared holder was not loaded, or the method could 971 // not be found. Create a dummy ciMethod to represent the failed 972 // lookup. 973 ciSymbol* name = get_symbol(name_sym); 974 ciSymbol* signature = get_symbol(sig_sym); 975 return get_unloaded_method(holder, name, signature, accessor); 976 } 977 } 978 979 980 // ------------------------------------------------------------------ 981 // ciEnv::get_instance_klass_for_declared_method_holder 982 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) { 983 // For the case of <array>.clone(), the method holder can be a ciArrayKlass 984 // instead of a ciInstanceKlass. For that case simply pretend that the 985 // declared holder is Object.clone since that's where the call will bottom out. 986 // A more correct fix would trickle out through many interfaces in CI, 987 // requiring ciInstanceKlass* to become ciKlass* and many more places would 988 // require checks to make sure the expected type was found. Given that this 989 // only occurs for clone() the more extensive fix seems like overkill so 990 // instead we simply smear the array type into Object. 991 guarantee(method_holder != nullptr, "no method holder"); 992 if (method_holder->is_instance_klass()) { 993 return method_holder->as_instance_klass(); 994 } else if (method_holder->is_array_klass()) { 995 return current()->Object_klass(); 996 } else { 997 ShouldNotReachHere(); 998 } 999 return nullptr; 1000 } 1001 1002 1003 // ------------------------------------------------------------------ 1004 // ciEnv::get_method_by_index 1005 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool, 1006 int index, Bytecodes::Code bc, 1007 ciInstanceKlass* accessor) { 1008 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);) 1009 } 1010 1011 1012 // ------------------------------------------------------------------ 1013 // ciEnv::name_buffer 1014 char *ciEnv::name_buffer(int req_len) { 1015 if (_name_buffer_len < req_len) { 1016 if (_name_buffer == nullptr) { 1017 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len); 1018 _name_buffer_len = req_len; 1019 } else { 1020 _name_buffer = 1021 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len); 1022 _name_buffer_len = req_len; 1023 } 1024 } 1025 return _name_buffer; 1026 } 1027 1028 // ------------------------------------------------------------------ 1029 // ciEnv::is_in_vm 1030 bool ciEnv::is_in_vm() { 1031 return JavaThread::current()->thread_state() == _thread_in_vm; 1032 } 1033 1034 // ------------------------------------------------------------------ 1035 // ciEnv::validate_compile_task_dependencies 1036 // 1037 // Check for changes during compilation (e.g. class loads, evolution, 1038 // breakpoints, call site invalidation). 1039 void ciEnv::validate_compile_task_dependencies(ciMethod* target) { 1040 if (failing()) return; // no need for further checks 1041 1042 Dependencies::DepType result = dependencies()->validate_dependencies(_task); 1043 if (result != Dependencies::end_marker) { 1044 if (result == Dependencies::call_site_target_value) { 1045 _inc_decompile_count_on_failure = false; 1046 record_failure("call site target change"); 1047 } else if (Dependencies::is_klass_type(result)) { 1048 record_failure("concurrent class loading"); 1049 } else { 1050 record_failure("invalid non-klass dependency"); 1051 } 1052 } 1053 } 1054 1055 // ------------------------------------------------------------------ 1056 // ciEnv::register_method 1057 void ciEnv::register_method(ciMethod* target, 1058 int entry_bci, 1059 CodeOffsets* offsets, 1060 int orig_pc_offset, 1061 CodeBuffer* code_buffer, 1062 int frame_words, 1063 OopMapSet* oop_map_set, 1064 ExceptionHandlerTable* handler_table, 1065 ImplicitExceptionTable* inc_table, 1066 AbstractCompiler* compiler, 1067 bool has_unsafe_access, 1068 bool has_wide_vectors, 1069 bool has_monitors, 1070 int immediate_oops_patched, 1071 RTMState rtm_state) { 1072 VM_ENTRY_MARK; 1073 nmethod* nm = nullptr; 1074 { 1075 methodHandle method(THREAD, target->get_Method()); 1076 1077 // We require method counters to store some method state (max compilation levels) required by the compilation policy. 1078 if (method->get_method_counters(THREAD) == nullptr) { 1079 record_failure("can't create method counters"); 1080 // All buffers in the CodeBuffer are allocated in the CodeCache. 1081 // If the code buffer is created on each compile attempt 1082 // as in C2, then it must be freed. 1083 code_buffer->free_blob(); 1084 return; 1085 } 1086 1087 // Check if memory should be freed before allocation 1088 CodeCache::gc_on_allocation(); 1089 1090 // To prevent compile queue updates. 1091 MutexLocker locker(THREAD, MethodCompileQueue_lock); 1092 1093 // Prevent InstanceKlass::add_to_hierarchy from running 1094 // and invalidating our dependencies until we install this method. 1095 // No safepoints are allowed. Otherwise, class redefinition can occur in between. 1096 MutexLocker ml(Compile_lock); 1097 NoSafepointVerifier nsv; 1098 1099 // Change in Jvmti state may invalidate compilation. 1100 if (!failing() && jvmti_state_changed()) { 1101 record_failure("Jvmti state change invalidated dependencies"); 1102 } 1103 1104 // Change in DTrace flags may invalidate compilation. 1105 if (!failing() && 1106 ( (!dtrace_method_probes() && DTraceMethodProbes) || 1107 (!dtrace_alloc_probes() && DTraceAllocProbes) )) { 1108 record_failure("DTrace flags change invalidated dependencies"); 1109 } 1110 1111 if (!failing() && target->needs_clinit_barrier() && 1112 target->holder()->is_in_error_state()) { 1113 record_failure("method holder is in error state"); 1114 } 1115 1116 if (!failing()) { 1117 if (log() != nullptr) { 1118 // Log the dependencies which this compilation declares. 1119 dependencies()->log_all_dependencies(); 1120 } 1121 1122 // Encode the dependencies now, so we can check them right away. 1123 dependencies()->encode_content_bytes(); 1124 1125 // Check for {class loads, evolution, breakpoints, ...} during compilation 1126 validate_compile_task_dependencies(target); 1127 } 1128 #if INCLUDE_RTM_OPT 1129 if (!failing() && (rtm_state != NoRTM) && 1130 (method()->method_data() != nullptr) && 1131 (method()->method_data()->rtm_state() != rtm_state)) { 1132 // Preemptive decompile if rtm state was changed. 1133 record_failure("RTM state change invalidated rtm code"); 1134 } 1135 #endif 1136 1137 if (failing()) { 1138 // While not a true deoptimization, it is a preemptive decompile. 1139 MethodData* mdo = method()->method_data(); 1140 if (mdo != nullptr && _inc_decompile_count_on_failure) { 1141 mdo->inc_decompile_count(); 1142 } 1143 1144 // All buffers in the CodeBuffer are allocated in the CodeCache. 1145 // If the code buffer is created on each compile attempt 1146 // as in C2, then it must be freed. 1147 code_buffer->free_blob(); 1148 return; 1149 } 1150 1151 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry"); 1152 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry"); 1153 1154 nm = nmethod::new_nmethod(method, 1155 compile_id(), 1156 entry_bci, 1157 offsets, 1158 orig_pc_offset, 1159 debug_info(), dependencies(), code_buffer, 1160 frame_words, oop_map_set, 1161 handler_table, inc_table, 1162 compiler, CompLevel(task()->comp_level())); 1163 1164 // Free codeBlobs 1165 code_buffer->free_blob(); 1166 1167 if (nm != nullptr) { 1168 nm->set_has_unsafe_access(has_unsafe_access); 1169 nm->set_has_wide_vectors(has_wide_vectors); 1170 nm->set_has_monitors(has_monitors); 1171 assert(!method->is_synchronized() || nm->has_monitors(), ""); 1172 #if INCLUDE_RTM_OPT 1173 nm->set_rtm_state(rtm_state); 1174 #endif 1175 1176 if (entry_bci == InvocationEntryBci) { 1177 if (TieredCompilation) { 1178 // If there is an old version we're done with it 1179 CompiledMethod* old = method->code(); 1180 if (TraceMethodReplacement && old != nullptr) { 1181 ResourceMark rm; 1182 char *method_name = method->name_and_sig_as_C_string(); 1183 tty->print_cr("Replacing method %s", method_name); 1184 } 1185 if (old != nullptr) { 1186 old->make_not_used(); 1187 } 1188 } 1189 1190 LogTarget(Info, nmethod, install) lt; 1191 if (lt.is_enabled()) { 1192 ResourceMark rm; 1193 char *method_name = method->name_and_sig_as_C_string(); 1194 lt.print("Installing method (%d) %s ", 1195 task()->comp_level(), method_name); 1196 } 1197 // Allow the code to be executed 1198 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag); 1199 if (nm->make_in_use()) { 1200 method->set_code(method, nm); 1201 } 1202 } else { 1203 LogTarget(Info, nmethod, install) lt; 1204 if (lt.is_enabled()) { 1205 ResourceMark rm; 1206 char *method_name = method->name_and_sig_as_C_string(); 1207 lt.print("Installing osr method (%d) %s @ %d", 1208 task()->comp_level(), method_name, entry_bci); 1209 } 1210 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag); 1211 if (nm->make_in_use()) { 1212 method->method_holder()->add_osr_nmethod(nm); 1213 } 1214 } 1215 } 1216 } 1217 1218 NoSafepointVerifier nsv; 1219 if (nm != nullptr) { 1220 // Compilation succeeded, post what we know about it 1221 nm->post_compiled_method(task()); 1222 task()->set_num_inlined_bytecodes(num_inlined_bytecodes()); 1223 } else { 1224 // The CodeCache is full. 1225 record_failure("code cache is full"); 1226 } 1227 1228 // safepoints are allowed again 1229 } 1230 1231 // ------------------------------------------------------------------ 1232 // ciEnv::find_system_klass 1233 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) { 1234 VM_ENTRY_MARK; 1235 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false); 1236 } 1237 1238 // ------------------------------------------------------------------ 1239 // ciEnv::comp_level 1240 int ciEnv::comp_level() { 1241 if (task() == nullptr) return CompilationPolicy::highest_compile_level(); 1242 return task()->comp_level(); 1243 } 1244 1245 // ------------------------------------------------------------------ 1246 // ciEnv::compile_id 1247 int ciEnv::compile_id() { 1248 if (task() == nullptr) return 0; 1249 return task()->compile_id(); 1250 } 1251 1252 // ------------------------------------------------------------------ 1253 // ciEnv::notice_inlined_method() 1254 void ciEnv::notice_inlined_method(ciMethod* method) { 1255 _num_inlined_bytecodes += method->code_size_for_inlining(); 1256 } 1257 1258 // ------------------------------------------------------------------ 1259 // ciEnv::num_inlined_bytecodes() 1260 int ciEnv::num_inlined_bytecodes() const { 1261 return _num_inlined_bytecodes; 1262 } 1263 1264 // ------------------------------------------------------------------ 1265 // ciEnv::record_failure() 1266 void ciEnv::record_failure(const char* reason) { 1267 if (_failure_reason == nullptr) { 1268 // Record the first failure reason. 1269 _failure_reason = reason; 1270 } 1271 } 1272 1273 void ciEnv::report_failure(const char* reason) { 1274 EventCompilationFailure event; 1275 if (event.should_commit()) { 1276 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason); 1277 } 1278 } 1279 1280 // ------------------------------------------------------------------ 1281 // ciEnv::record_method_not_compilable() 1282 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) { 1283 int new_compilable = 1284 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ; 1285 1286 // Only note transitions to a worse state 1287 if (new_compilable > _compilable) { 1288 if (log() != nullptr) { 1289 if (all_tiers) { 1290 log()->elem("method_not_compilable"); 1291 } else { 1292 log()->elem("method_not_compilable_at_tier level='%d'", 1293 current()->task()->comp_level()); 1294 } 1295 } 1296 _compilable = new_compilable; 1297 1298 // Reset failure reason; this one is more important. 1299 _failure_reason = nullptr; 1300 record_failure(reason); 1301 } 1302 } 1303 1304 // ------------------------------------------------------------------ 1305 // ciEnv::record_out_of_memory_failure() 1306 void ciEnv::record_out_of_memory_failure() { 1307 // If memory is low, we stop compiling methods. 1308 record_method_not_compilable("out of memory"); 1309 } 1310 1311 ciInstance* ciEnv::unloaded_ciinstance() { 1312 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();) 1313 } 1314 1315 // ------------------------------------------------------------------ 1316 // Replay support 1317 1318 1319 // Lookup location descriptor for the class, if any. 1320 // Returns false if not found. 1321 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const { 1322 bool found = false; 1323 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found); 1324 if (!found) { 1325 return false; 1326 } 1327 loc = _dyno_locs->at(pos); 1328 return found; 1329 } 1330 1331 // Associate the current location descriptor with the given class and record for later lookup. 1332 void ciEnv::set_dyno_loc(const InstanceKlass* ik) { 1333 const char *loc = os::strdup(_dyno_name); 1334 bool found = false; 1335 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found); 1336 if (found) { 1337 _dyno_locs->at_put(pos, loc); 1338 } else { 1339 _dyno_klasses->insert_before(pos, ik); 1340 _dyno_locs->insert_before(pos, loc); 1341 } 1342 } 1343 1344 // Associate the current location descriptor with the given class and record for later lookup. 1345 // If it turns out that there are multiple locations for the given class, that conflict should 1346 // be handled here. Currently we choose the first location found. 1347 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) { 1348 if (!ik->is_hidden()) { 1349 return; 1350 } 1351 const char *loc0; 1352 if (!dyno_loc(ik, loc0)) { 1353 set_dyno_loc(ik); 1354 } 1355 } 1356 1357 // Look up the location descriptor for the given class and print it to the output stream. 1358 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const { 1359 const char *loc; 1360 if (dyno_loc(ik, loc)) { 1361 out->print("%s", loc); 1362 return true; 1363 } else { 1364 return false; 1365 } 1366 } 1367 1368 // Look up the location descriptor for the given class and return it as a string. 1369 // Returns null if no location is found. 1370 const char *ciEnv::dyno_name(const InstanceKlass* ik) const { 1371 if (ik->is_hidden()) { 1372 stringStream ss; 1373 if (print_dyno_loc(&ss, ik)) { 1374 ss.print(" ;"); // add terminator 1375 const char* call_site = ss.as_string(); 1376 return call_site; 1377 } 1378 } 1379 return nullptr; 1380 } 1381 1382 // Look up the location descriptor for the given class and return it as a string. 1383 // Returns the class name as a fallback if no location is found. 1384 const char *ciEnv::replay_name(ciKlass* k) const { 1385 if (k->is_instance_klass()) { 1386 return replay_name(k->as_instance_klass()->get_instanceKlass()); 1387 } 1388 return k->name()->as_quoted_ascii(); 1389 } 1390 1391 // Look up the location descriptor for the given class and return it as a string. 1392 // Returns the class name as a fallback if no location is found. 1393 const char *ciEnv::replay_name(const InstanceKlass* ik) const { 1394 const char* name = dyno_name(ik); 1395 if (name != nullptr) { 1396 return name; 1397 } 1398 return ik->name()->as_quoted_ascii(); 1399 } 1400 1401 // Process a java.lang.invoke.MemberName object and record any dynamic locations. 1402 void ciEnv::record_member(Thread* thread, oop member) { 1403 assert(java_lang_invoke_MemberName::is_instance(member), "!"); 1404 // Check MemberName.clazz field 1405 oop clazz = java_lang_invoke_MemberName::clazz(member); 1406 if (clazz->klass()->is_instance_klass()) { 1407 RecordLocation fp(this, "clazz"); 1408 InstanceKlass* ik = InstanceKlass::cast(clazz->klass()); 1409 record_best_dyno_loc(ik); 1410 } 1411 // Check MemberName.method.vmtarget field 1412 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member); 1413 if (vmtarget != nullptr) { 1414 RecordLocation fp2(this, "<vmtarget>"); 1415 InstanceKlass* ik = vmtarget->method_holder(); 1416 record_best_dyno_loc(ik); 1417 } 1418 } 1419 1420 // Read an object field. Lookup is done by name only. 1421 static inline oop obj_field(oop obj, const char* name) { 1422 return ciReplay::obj_field(obj, name); 1423 } 1424 1425 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations. 1426 void ciEnv::record_lambdaform(Thread* thread, oop form) { 1427 assert(java_lang_invoke_LambdaForm::is_instance(form), "!"); 1428 1429 { 1430 // Check LambdaForm.vmentry field 1431 oop member = java_lang_invoke_LambdaForm::vmentry(form); 1432 RecordLocation fp0(this, "vmentry"); 1433 record_member(thread, member); 1434 } 1435 1436 // Check LambdaForm.names array 1437 objArrayOop names = (objArrayOop)obj_field(form, "names"); 1438 if (names != nullptr) { 1439 RecordLocation lp0(this, "names"); 1440 int len = names->length(); 1441 for (int i = 0; i < len; ++i) { 1442 oop name = names->obj_at(i); 1443 RecordLocation lp1(this, "%d", i); 1444 // Check LambdaForm.names[i].function field 1445 RecordLocation lp2(this, "function"); 1446 oop function = obj_field(name, "function"); 1447 if (function != nullptr) { 1448 // Check LambdaForm.names[i].function.member field 1449 oop member = obj_field(function, "member"); 1450 if (member != nullptr) { 1451 RecordLocation lp3(this, "member"); 1452 record_member(thread, member); 1453 } 1454 // Check LambdaForm.names[i].function.resolvedHandle field 1455 oop mh = obj_field(function, "resolvedHandle"); 1456 if (mh != nullptr) { 1457 RecordLocation lp3(this, "resolvedHandle"); 1458 record_mh(thread, mh); 1459 } 1460 // Check LambdaForm.names[i].function.invoker field 1461 oop invoker = obj_field(function, "invoker"); 1462 if (invoker != nullptr) { 1463 RecordLocation lp3(this, "invoker"); 1464 record_mh(thread, invoker); 1465 } 1466 } 1467 } 1468 } 1469 } 1470 1471 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations. 1472 void ciEnv::record_mh(Thread* thread, oop mh) { 1473 { 1474 // Check MethodHandle.form field 1475 oop form = java_lang_invoke_MethodHandle::form(mh); 1476 RecordLocation fp(this, "form"); 1477 record_lambdaform(thread, form); 1478 } 1479 // Check DirectMethodHandle.member field 1480 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) { 1481 oop member = java_lang_invoke_DirectMethodHandle::member(mh); 1482 RecordLocation fp(this, "member"); 1483 record_member(thread, member); 1484 } else { 1485 // Check <MethodHandle subclass>.argL<n> fields 1486 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists 1487 char arg_name[] = "argLXX"; 1488 int max_arg = 99; 1489 for (int index = 0; index <= max_arg; ++index) { 1490 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index); 1491 oop arg = obj_field(mh, arg_name); 1492 if (arg != nullptr) { 1493 RecordLocation fp(this, "%s", arg_name); 1494 if (arg->klass()->is_instance_klass()) { 1495 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass()); 1496 record_best_dyno_loc(ik2); 1497 record_call_site_obj(thread, arg); 1498 } 1499 } else { 1500 break; 1501 } 1502 } 1503 } 1504 } 1505 1506 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations. 1507 // Types currently supported are MethodHandle and CallSite. 1508 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object. 1509 void ciEnv::record_call_site_obj(Thread* thread, oop obj) 1510 { 1511 if (obj != nullptr) { 1512 if (java_lang_invoke_MethodHandle::is_instance(obj)) { 1513 record_mh(thread, obj); 1514 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) { 1515 oop target = java_lang_invoke_CallSite::target(obj); 1516 if (target->klass()->is_instance_klass()) { 1517 RecordLocation fp(this, "target"); 1518 InstanceKlass* ik = InstanceKlass::cast(target->klass()); 1519 record_best_dyno_loc(ik); 1520 } 1521 } 1522 } 1523 } 1524 1525 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations. 1526 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) { 1527 InstanceKlass* holder = adapter->method_holder(); 1528 if (!holder->is_hidden()) { 1529 return; 1530 } 1531 RecordLocation fp(this, "<adapter>"); 1532 record_best_dyno_loc(holder); 1533 } 1534 1535 // Process an invokedynamic call site and record any dynamic locations. 1536 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) { 1537 int index = cp->decode_invokedynamic_index(indy_index); 1538 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(index); 1539 if (indy_info->method() != nullptr) { 1540 // process the adapter 1541 Method* adapter = indy_info->method(); 1542 record_call_site_method(thread, adapter); 1543 // process the appendix 1544 oop appendix = cp->resolved_reference_from_indy(index); 1545 { 1546 RecordLocation fp(this, "<appendix>"); 1547 record_call_site_obj(thread, appendix); 1548 } 1549 // process the BSM 1550 int pool_index = indy_info->constant_pool_index(); 1551 BootstrapInfo bootstrap_specifier(cp, pool_index, index); 1552 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread); 1553 { 1554 RecordLocation fp(this, "<bsm>"); 1555 record_call_site_obj(thread, bsm); 1556 } 1557 } 1558 } 1559 1560 // Process an invokehandle call site and record any dynamic locations. 1561 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) { 1562 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle); 1563 if (!cp->tag_at(holder_index).is_klass()) { 1564 return; // not resolved 1565 } 1566 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index); 1567 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle); 1568 if (MethodHandles::is_signature_polymorphic_name(holder, name)) { 1569 ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index)); 1570 if (cp_cache_entry->is_resolved(Bytecodes::_invokehandle)) { 1571 // process the adapter 1572 Method* adapter = cp_cache_entry->f1_as_method(); 1573 oop appendix = cp_cache_entry->appendix_if_resolved(cp); 1574 record_call_site_method(thread, adapter); 1575 // process the appendix 1576 { 1577 RecordLocation fp(this, "<appendix>"); 1578 record_call_site_obj(thread, appendix); 1579 } 1580 } 1581 } 1582 } 1583 1584 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or 1585 // constant pool entries and record for future lookup. 1586 void ciEnv::find_dynamic_call_sites() { 1587 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr); 1588 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr); 1589 1590 // Iterate over the class hierarchy 1591 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) { 1592 Klass* sub = iter.klass(); 1593 if (sub->is_instance_klass()) { 1594 InstanceKlass *isub = InstanceKlass::cast(sub); 1595 InstanceKlass* ik = isub; 1596 if (!ik->is_linked()) { 1597 continue; 1598 } 1599 if (ik->is_hidden()) { 1600 continue; 1601 } 1602 JavaThread* thread = JavaThread::current(); 1603 const constantPoolHandle pool(thread, ik->constants()); 1604 1605 // Look for invokedynamic/invokehandle call sites 1606 for (int i = 0; i < ik->methods()->length(); ++i) { 1607 Method* m = ik->methods()->at(i); 1608 1609 BytecodeStream bcs(methodHandle(thread, m)); 1610 while (!bcs.is_last_bytecode()) { 1611 Bytecodes::Code opcode = bcs.next(); 1612 opcode = bcs.raw_code(); 1613 switch (opcode) { 1614 case Bytecodes::_invokedynamic: 1615 case Bytecodes::_invokehandle: { 1616 RecordLocation fp(this, "@bci %s %s %s %d", 1617 ik->name()->as_quoted_ascii(), 1618 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(), 1619 bcs.bci()); 1620 if (opcode == Bytecodes::_invokedynamic) { 1621 int index = bcs.get_index_u4(); 1622 process_invokedynamic(pool, index, thread); 1623 } else { 1624 assert(opcode == Bytecodes::_invokehandle, "new switch label added?"); 1625 int cp_cache_index = bcs.get_index_u2_cpcache(); 1626 process_invokehandle(pool, cp_cache_index, thread); 1627 } 1628 break; 1629 } 1630 default: 1631 break; 1632 } 1633 } 1634 } 1635 1636 // Look for MethodHandle constant pool entries 1637 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii()); 1638 int len = pool->length(); 1639 for (int i = 0; i < len; ++i) { 1640 if (pool->tag_at(i).is_method_handle()) { 1641 bool found_it; 1642 oop mh = pool->find_cached_constant_at(i, found_it, thread); 1643 if (mh != nullptr) { 1644 RecordLocation fp(this, "%d", i); 1645 record_mh(thread, mh); 1646 } 1647 } 1648 } 1649 } 1650 } 1651 } 1652 1653 void ciEnv::dump_compile_data(outputStream* out) { 1654 CompileTask* task = this->task(); 1655 if (task) { 1656 #ifdef COMPILER2 1657 if (ReplayReduce && compiler_data() != nullptr) { 1658 // Dump C2 "reduced" inlining data. 1659 ((Compile*)compiler_data())->dump_inline_data_reduced(out); 1660 } 1661 #endif 1662 Method* method = task->method(); 1663 int entry_bci = task->osr_bci(); 1664 int comp_level = task->comp_level(); 1665 out->print("compile "); 1666 get_method(method)->dump_name_as_ascii(out); 1667 out->print(" %d %d", entry_bci, comp_level); 1668 if (compiler_data() != nullptr) { 1669 if (is_c2_compile(comp_level)) { 1670 #ifdef COMPILER2 1671 // Dump C2 inlining data. 1672 ((Compile*)compiler_data())->dump_inline_data(out); 1673 #endif 1674 } else if (is_c1_compile(comp_level)) { 1675 #ifdef COMPILER1 1676 // Dump C1 inlining data. 1677 ((Compilation*)compiler_data())->dump_inline_data(out); 1678 #endif 1679 } 1680 } 1681 out->cr(); 1682 } 1683 } 1684 1685 // Called from VM error reporter, so be careful. 1686 // Don't safepoint or acquire any locks. 1687 // 1688 void ciEnv::dump_replay_data_helper(outputStream* out) { 1689 NoSafepointVerifier no_safepoint; 1690 ResourceMark rm; 1691 1692 dump_replay_data_version(out); 1693 #if INCLUDE_JVMTI 1694 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables); 1695 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint); 1696 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions); 1697 #endif // INCLUDE_JVMTI 1698 1699 find_dynamic_call_sites(); 1700 1701 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata(); 1702 out->print_cr("# %d ciObject found", objects->length()); 1703 1704 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right 1705 // protection domain to load subsequent classes during replay compilation. 1706 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder()); 1707 1708 for (int i = 0; i < objects->length(); i++) { 1709 objects->at(i)->dump_replay_data(out); 1710 } 1711 dump_compile_data(out); 1712 out->flush(); 1713 } 1714 1715 // Called from VM error reporter, so be careful. 1716 // Don't safepoint or acquire any locks. 1717 // 1718 void ciEnv::dump_replay_data_unsafe(outputStream* out) { 1719 GUARDED_VM_ENTRY( 1720 dump_replay_data_helper(out); 1721 ) 1722 } 1723 1724 void ciEnv::dump_replay_data(outputStream* out) { 1725 GUARDED_VM_ENTRY( 1726 MutexLocker ml(Compile_lock); 1727 dump_replay_data_helper(out); 1728 ) 1729 } 1730 1731 void ciEnv::dump_replay_data(int compile_id) { 1732 char buffer[64]; 1733 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id); 1734 if (ret > 0) { 1735 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666); 1736 if (fd != -1) { 1737 FILE* replay_data_file = os::fdopen(fd, "w"); 1738 if (replay_data_file != nullptr) { 1739 fileStream replay_data_stream(replay_data_file, /*need_close=*/true); 1740 dump_replay_data(&replay_data_stream); 1741 tty->print_cr("# Compiler replay data is saved as: %s", buffer); 1742 } else { 1743 tty->print_cr("# Can't open file to dump replay data."); 1744 close(fd); 1745 } 1746 } 1747 } 1748 } 1749 1750 void ciEnv::dump_inline_data(int compile_id) { 1751 char buffer[64]; 1752 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id); 1753 if (ret > 0) { 1754 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666); 1755 if (fd != -1) { 1756 FILE* inline_data_file = os::fdopen(fd, "w"); 1757 if (inline_data_file != nullptr) { 1758 fileStream replay_data_stream(inline_data_file, /*need_close=*/true); 1759 GUARDED_VM_ENTRY( 1760 MutexLocker ml(Compile_lock); 1761 dump_replay_data_version(&replay_data_stream); 1762 dump_compile_data(&replay_data_stream); 1763 ) 1764 replay_data_stream.flush(); 1765 tty->print("# Compiler inline data is saved as: "); 1766 tty->print_cr("%s", buffer); 1767 } else { 1768 tty->print_cr("# Can't open file to dump inline data."); 1769 close(fd); 1770 } 1771 } 1772 } 1773 } 1774 1775 void ciEnv::dump_replay_data_version(outputStream* out) { 1776 out->print_cr("version %d", REPLAY_VERSION); 1777 }