1 /* 2 * Copyright (c) 1999, 2025, 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 "ci/ciConstant.hpp" 26 #include "ci/ciEnv.hpp" 27 #include "ci/ciField.hpp" 28 #include "ci/ciInlineKlass.hpp" 29 #include "ci/ciInstance.hpp" 30 #include "ci/ciInstanceKlass.hpp" 31 #include "ci/ciMethod.hpp" 32 #include "ci/ciNullObject.hpp" 33 #include "ci/ciReplay.hpp" 34 #include "ci/ciSymbols.hpp" 35 #include "ci/ciUtilities.inline.hpp" 36 #include "classfile/javaClasses.hpp" 37 #include "classfile/javaClasses.inline.hpp" 38 #include "classfile/systemDictionary.hpp" 39 #include "classfile/vmClasses.hpp" 40 #include "classfile/vmSymbols.hpp" 41 #include "code/codeCache.hpp" 42 #include "code/scopeDesc.hpp" 43 #include "compiler/compilationLog.hpp" 44 #include "compiler/compilationPolicy.hpp" 45 #include "compiler/compileBroker.hpp" 46 #include "compiler/compilerEvent.hpp" 47 #include "compiler/compileLog.hpp" 48 #include "compiler/compileTask.hpp" 49 #include "compiler/disassembler.hpp" 50 #include "gc/shared/collectedHeap.inline.hpp" 51 #include "interpreter/bytecodeStream.hpp" 52 #include "interpreter/linkResolver.hpp" 53 #include "jfr/jfrEvents.hpp" 54 #include "jvm.h" 55 #include "logging/log.hpp" 56 #include "memory/allocation.inline.hpp" 57 #include "memory/oopFactory.hpp" 58 #include "memory/resourceArea.hpp" 59 #include "memory/universe.hpp" 60 #include "oops/constantPool.inline.hpp" 61 #include "oops/cpCache.inline.hpp" 62 #include "oops/method.inline.hpp" 63 #include "oops/methodData.hpp" 64 #include "oops/objArrayKlass.hpp" 65 #include "oops/objArrayOop.inline.hpp" 66 #include "oops/oop.inline.hpp" 67 #include "oops/resolvedIndyEntry.hpp" 68 #include "oops/symbolHandle.hpp" 69 #include "prims/jvmtiExport.hpp" 70 #include "prims/methodHandles.hpp" 71 #include "runtime/fieldDescriptor.inline.hpp" 72 #include "runtime/handles.inline.hpp" 73 #include "runtime/init.hpp" 74 #include "runtime/javaThread.hpp" 75 #include "runtime/jniHandles.inline.hpp" 76 #include "runtime/reflection.hpp" 77 #include "runtime/safepointVerifiers.hpp" 78 #include "runtime/sharedRuntime.hpp" 79 #include "utilities/dtrace.hpp" 80 #include "utilities/macros.hpp" 81 #ifdef COMPILER1 82 #include "c1/c1_Runtime1.hpp" 83 #endif 84 #ifdef COMPILER2 85 #include "opto/runtime.hpp" 86 #endif 87 88 // ciEnv 89 // 90 // This class is the top level broker for requests from the compiler 91 // to the VM. 92 93 ciObject* ciEnv::_null_object_instance; 94 95 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr; 96 VM_CLASSES_DO(VM_CLASS_DEFN) 97 #undef VM_CLASS_DEFN 98 99 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr; 100 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr; 101 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr; 102 103 #ifndef PRODUCT 104 static bool firstEnv = true; 105 #endif /* PRODUCT */ 106 107 // ------------------------------------------------------------------ 108 // ciEnv::ciEnv 109 ciEnv::ciEnv(CompileTask* task) 110 : _ciEnv_arena(mtCompiler, Arena::Tag::tag_cienv) { 111 VM_ENTRY_MARK; 112 113 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. 114 thread->set_env(this); 115 assert(ciEnv::current() == this, "sanity"); 116 117 _oop_recorder = nullptr; 118 _debug_info = nullptr; 119 _dependencies = nullptr; 120 _inc_decompile_count_on_failure = true; 121 _compilable = MethodCompilable; 122 _break_at_compile = false; 123 _compiler_data = nullptr; 124 #ifndef PRODUCT 125 assert(!firstEnv, "not initialized properly"); 126 #endif /* !PRODUCT */ 127 128 _num_inlined_bytecodes = 0; 129 assert(task == nullptr || thread->task() == task, "sanity"); 130 if (task != nullptr) { 131 task->mark_started(os::elapsed_counter()); 132 } 133 _task = task; 134 _log = nullptr; 135 136 // Temporary buffer for creating symbols and such. 137 _name_buffer = nullptr; 138 _name_buffer_len = 0; 139 140 _arena = &_ciEnv_arena; 141 _factory = new (_arena) ciObjectFactory(_arena, 128); 142 143 // Preload commonly referenced system ciObjects. 144 145 // During VM initialization, these instances have not yet been created. 146 // Assertions ensure that these instances are not accessed before 147 // their initialization. 148 149 assert(Universe::is_fully_initialized(), "should be complete"); 150 151 oop o = Universe::null_ptr_exception_instance(); 152 assert(o != nullptr, "should have been initialized"); 153 _NullPointerException_instance = get_object(o)->as_instance(); 154 o = Universe::arithmetic_exception_instance(); 155 assert(o != nullptr, "should have been initialized"); 156 _ArithmeticException_instance = get_object(o)->as_instance(); 157 o = Universe::array_index_out_of_bounds_exception_instance(); 158 assert(o != nullptr, "should have been initialized"); 159 _ArrayIndexOutOfBoundsException_instance = get_object(o)->as_instance(); 160 o = Universe::array_store_exception_instance(); 161 assert(o != nullptr, "should have been initialized"); 162 _ArrayStoreException_instance = get_object(o)->as_instance(); 163 o = Universe::class_cast_exception_instance(); 164 assert(o != nullptr, "should have been initialized"); 165 _ClassCastException_instance = get_object(o)->as_instance(); 166 167 _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, Arena::Tag::tag_cienv) { 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 _inc_decompile_count_on_failure = true; 255 _compilable = MethodCompilable_never; 256 _break_at_compile = false; 257 _compiler_data = nullptr; 258 #ifndef PRODUCT 259 assert(firstEnv, "must be first"); 260 firstEnv = false; 261 #endif /* !PRODUCT */ 262 263 _num_inlined_bytecodes = 0; 264 _task = nullptr; 265 _log = nullptr; 266 267 // Temporary buffer for creating symbols and such. 268 _name_buffer = nullptr; 269 _name_buffer_len = 0; 270 271 _arena = arena; 272 _factory = new (_arena) ciObjectFactory(_arena, 128); 273 274 // Preload commonly referenced system ciObjects. 275 276 // During VM initialization, these instances have not yet been created. 277 // Assertions ensure that these instances are not accessed before 278 // their initialization. 279 280 assert(Universe::is_fully_initialized(), "must be"); 281 282 _NullPointerException_instance = nullptr; 283 _ArithmeticException_instance = nullptr; 284 _ArrayIndexOutOfBoundsException_instance = nullptr; 285 _ArrayStoreException_instance = nullptr; 286 _ClassCastException_instance = nullptr; 287 _the_null_string = nullptr; 288 _the_min_jint_string = nullptr; 289 290 _jvmti_redefinition_count = 0; 291 _jvmti_can_hotswap_or_post_breakpoint = false; 292 _jvmti_can_access_local_variables = false; 293 _jvmti_can_post_on_exceptions = false; 294 _jvmti_can_pop_frame = false; 295 296 _dyno_klasses = nullptr; 297 _dyno_locs = nullptr; 298 } 299 300 ciEnv::~ciEnv() { 301 GUARDED_VM_ENTRY( 302 CompilerThread* current_thread = CompilerThread::current(); 303 _factory->remove_symbols(); 304 // Need safepoint to clear the env on the thread. RedefineClasses might 305 // be reading it. 306 current_thread->set_env(nullptr); 307 ) 308 } 309 310 // ------------------------------------------------------------------ 311 // Cache Jvmti state 312 bool ciEnv::cache_jvmti_state() { 313 VM_ENTRY_MARK; 314 // Get Jvmti capabilities under lock to get consistent values. 315 MutexLocker mu(JvmtiThreadState_lock); 316 _jvmti_redefinition_count = JvmtiExport::redefinition_count(); 317 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint(); 318 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables(); 319 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions(); 320 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame(); 321 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info(); 322 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space(); 323 return _task != nullptr && _task->method()->is_old(); 324 } 325 326 bool ciEnv::jvmti_state_changed() const { 327 // Some classes were redefined 328 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) { 329 return true; 330 } 331 332 if (!_jvmti_can_access_local_variables && 333 JvmtiExport::can_access_local_variables()) { 334 return true; 335 } 336 if (!_jvmti_can_hotswap_or_post_breakpoint && 337 JvmtiExport::can_hotswap_or_post_breakpoint()) { 338 return true; 339 } 340 if (!_jvmti_can_post_on_exceptions && 341 JvmtiExport::can_post_on_exceptions()) { 342 return true; 343 } 344 if (!_jvmti_can_pop_frame && 345 JvmtiExport::can_pop_frame()) { 346 return true; 347 } 348 if (!_jvmti_can_get_owned_monitor_info && 349 JvmtiExport::can_get_owned_monitor_info()) { 350 return true; 351 } 352 if (!_jvmti_can_walk_any_space && 353 JvmtiExport::can_walk_any_space()) { 354 return true; 355 } 356 357 return false; 358 } 359 360 // ------------------------------------------------------------------ 361 // Cache DTrace flags 362 void ciEnv::cache_dtrace_flags() { 363 // Need lock? 364 _dtrace_method_probes = DTraceMethodProbes; 365 _dtrace_alloc_probes = DTraceAllocProbes; 366 } 367 368 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) { 369 switch (type) { 370 case T_BOOLEAN: return Boolean_klass(); 371 case T_BYTE : return Byte_klass(); 372 case T_CHAR : return Character_klass(); 373 case T_SHORT : return Short_klass(); 374 case T_INT : return Integer_klass(); 375 case T_LONG : return Long_klass(); 376 case T_FLOAT : return Float_klass(); 377 case T_DOUBLE : return Double_klass(); 378 379 default: 380 assert(false, "not a primitive: %s", type2name(type)); 381 return nullptr; 382 } 383 } 384 385 ciInstance* ciEnv::the_null_string() { 386 if (_the_null_string == nullptr) { 387 VM_ENTRY_MARK; 388 _the_null_string = get_object(Universe::the_null_string())->as_instance(); 389 } 390 return _the_null_string; 391 } 392 393 ciInstance* ciEnv::the_min_jint_string() { 394 if (_the_min_jint_string == nullptr) { 395 VM_ENTRY_MARK; 396 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance(); 397 } 398 return _the_min_jint_string; 399 } 400 401 // ------------------------------------------------------------------ 402 // ciEnv::get_method_from_handle 403 ciMethod* ciEnv::get_method_from_handle(Method* method) { 404 VM_ENTRY_MARK; 405 return get_metadata(method)->as_method(); 406 } 407 408 // ------------------------------------------------------------------ 409 // ciEnv::check_klass_accessiblity 410 // 411 // Note: the logic of this method should mirror the logic of 412 // ConstantPool::verify_constant_pool_resolve. 413 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass, 414 Klass* resolved_klass) { 415 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) { 416 return true; 417 } 418 if (accessing_klass->is_obj_array_klass()) { 419 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass(); 420 } 421 if (!accessing_klass->is_instance_klass()) { 422 return true; 423 } 424 425 if (resolved_klass->is_objArray_klass()) { 426 // Find the element klass, if this is an array. 427 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass(); 428 } 429 if (resolved_klass->is_instance_klass()) { 430 return (Reflection::verify_class_access(accessing_klass->get_Klass(), 431 InstanceKlass::cast(resolved_klass), 432 true) == Reflection::ACCESS_OK); 433 } 434 return true; 435 } 436 437 // ------------------------------------------------------------------ 438 // ciEnv::get_klass_by_name_impl 439 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass, 440 const constantPoolHandle& cpool, 441 ciSymbol* name, 442 bool require_local) { 443 ASSERT_IN_VM; 444 Thread* current = Thread::current(); 445 446 // Now we need to check the SystemDictionary 447 Symbol* sym = name->get_symbol(); 448 if (Signature::has_envelope(sym)) { 449 // This is a name from a signature. Strip off the trimmings. 450 // Call recursive to keep scope of strippedsym. 451 TempNewSymbol strippedsym = Signature::strip_envelope(sym); 452 ciSymbol* strippedname = get_symbol(strippedsym); 453 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local); 454 } 455 456 // Check for prior unloaded klass. The SystemDictionary's answers 457 // can vary over time but the compiler needs consistency. 458 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name); 459 if (unloaded_klass != nullptr) { 460 if (require_local) return nullptr; 461 return unloaded_klass; 462 } 463 464 Handle loader; 465 if (accessing_klass != nullptr) { 466 loader = Handle(current, accessing_klass->loader()); 467 } 468 469 Klass* found_klass = require_local ? 470 SystemDictionary::find_instance_or_array_klass(current, sym, loader) : 471 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader); 472 473 // If we fail to find an array klass, look again for its element type. 474 // The element type may be available either locally or via constraints. 475 // In either case, if we can find the element type in the system dictionary, 476 // we must build an array type around it. The CI requires array klasses 477 // to be loaded if their element klasses are loaded, except when memory 478 // is exhausted. 479 if (Signature::is_array(sym) && 480 (sym->char_at(1) == JVM_SIGNATURE_ARRAY || 481 sym->char_at(1) == JVM_SIGNATURE_CLASS )) { 482 // We have an unloaded array. 483 // Build it on the fly if the element class exists. 484 SignatureStream ss(sym, false); 485 ss.skip_array_prefix(1); 486 // Get element ciKlass recursively. 487 ciKlass* elem_klass = 488 get_klass_by_name_impl(accessing_klass, 489 cpool, 490 get_symbol(ss.as_symbol()), 491 require_local); 492 if (elem_klass != nullptr && elem_klass->is_loaded()) { 493 // Now make an array for it 494 return ciArrayKlass::make(elem_klass); 495 } 496 } 497 498 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) { 499 // Look inside the constant pool for pre-resolved class entries. 500 for (int i = cpool->length() - 1; i >= 1; i--) { 501 if (cpool->tag_at(i).is_klass()) { 502 Klass* kls = cpool->resolved_klass_at(i); 503 if (kls->name() == sym) { 504 found_klass = kls; 505 break; 506 } 507 } 508 } 509 } 510 511 if (found_klass != nullptr) { 512 // Found it. Build a CI handle. 513 return get_klass(found_klass); 514 } 515 516 if (require_local) return nullptr; 517 518 // Not yet loaded into the VM, or not governed by loader constraints. 519 // Make a CI representative for it. 520 int i = 0; 521 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) { 522 i++; 523 } 524 return get_unloaded_klass(accessing_klass, name); 525 } 526 527 // ------------------------------------------------------------------ 528 // ciEnv::get_klass_by_name 529 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass, 530 ciSymbol* klass_name, 531 bool require_local) { 532 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass, 533 constantPoolHandle(), 534 klass_name, 535 require_local);) 536 } 537 538 // ------------------------------------------------------------------ 539 // ciEnv::get_klass_by_index_impl 540 // 541 // Implementation of get_klass_by_index. 542 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool, 543 int index, 544 bool& is_accessible, 545 ciInstanceKlass* accessor) { 546 Klass* klass = nullptr; 547 Symbol* klass_name = nullptr; 548 549 if (cpool->tag_at(index).is_symbol()) { 550 klass_name = cpool->symbol_at(index); 551 } else { 552 // Check if it's resolved if it's not a symbol constant pool entry. 553 klass = ConstantPool::klass_at_if_loaded(cpool, index); 554 // Try to look it up by name. 555 if (klass == nullptr) { 556 klass_name = cpool->klass_name_at(index); 557 } 558 } 559 560 if (klass == nullptr) { 561 // Not found in constant pool. Use the name to do the lookup. 562 ciKlass* k = get_klass_by_name_impl(accessor, 563 cpool, 564 get_symbol(klass_name), 565 false); 566 // Calculate accessibility the hard way. 567 if (!k->is_loaded()) { 568 is_accessible = false; 569 } else if (k->loader() != accessor->loader() && 570 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) { 571 // Loaded only remotely. Not linked yet. 572 is_accessible = false; 573 } else { 574 // Linked locally, and we must also check public/private, etc. 575 is_accessible = check_klass_accessibility(accessor, k->get_Klass()); 576 } 577 return k; 578 } 579 580 // Check for prior unloaded klass. The SystemDictionary's answers 581 // can vary over time but the compiler needs consistency. 582 ciSymbol* name = get_symbol(klass->name()); 583 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name); 584 if (unloaded_klass != nullptr) { 585 is_accessible = false; 586 return unloaded_klass; 587 } 588 589 // It is known to be accessible, since it was found in the constant pool. 590 ciKlass* ciKlass = get_klass(klass); 591 is_accessible = true; 592 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) { 593 // Klass was unresolved at replay dump time and therefore not accessible. 594 is_accessible = false; 595 } 596 return ciKlass; 597 } 598 599 // ------------------------------------------------------------------ 600 // ciEnv::get_klass_by_index 601 // 602 // Get a klass from the constant pool. 603 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool, 604 int index, 605 bool& is_accessible, 606 ciInstanceKlass* accessor) { 607 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);) 608 } 609 610 // ------------------------------------------------------------------ 611 // ciEnv::unbox_primitive_value 612 // 613 // Unbox a primitive and return it as a ciConstant. 614 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) { 615 jvalue value; 616 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value); 617 if (bt != expected_bt && expected_bt != T_ILLEGAL) { 618 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name()); 619 return ciConstant(); 620 } 621 switch (bt) { 622 case T_BOOLEAN: return ciConstant(bt, value.z); 623 case T_BYTE: return ciConstant(bt, value.b); 624 case T_SHORT: return ciConstant(bt, value.s); 625 case T_CHAR: return ciConstant(bt, value.c); 626 case T_INT: return ciConstant(bt, value.i); 627 case T_LONG: return ciConstant(value.j); 628 case T_FLOAT: return ciConstant(value.f); 629 case T_DOUBLE: return ciConstant(value.d); 630 631 default: 632 assert(false, "not a primitive type: %s", type2name(bt)); 633 return ciConstant(); 634 } 635 } 636 637 // ------------------------------------------------------------------ 638 // ciEnv::get_resolved_constant 639 // 640 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) { 641 assert(obj_index >= 0, ""); 642 oop obj = cpool->resolved_reference_at(obj_index); 643 if (obj == nullptr) { 644 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference. 645 // Null constant is represented as a sentinel (non-null) value. 646 return ciConstant(); 647 } else if (obj == Universe::the_null_sentinel()) { 648 return ciConstant(T_OBJECT, get_object(nullptr)); 649 } else { 650 ciObject* ciobj = get_object(obj); 651 if (ciobj->is_array()) { 652 return ciConstant(T_ARRAY, ciobj); 653 } else { 654 int cp_index = cpool->object_to_cp_index(obj_index); 655 BasicType bt = cpool->basic_type_for_constant_at(cp_index); 656 if (is_java_primitive(bt)) { 657 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity"); 658 return unbox_primitive_value(ciobj, bt); 659 } else { 660 assert(ciobj->is_instance(), "should be an instance"); 661 return ciConstant(T_OBJECT, ciobj); 662 } 663 } 664 } 665 } 666 667 // ------------------------------------------------------------------ 668 // ciEnv::get_constant_by_index_impl 669 // 670 // Implementation of get_constant_by_index(). 671 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool, 672 int index, int obj_index, 673 ciInstanceKlass* accessor) { 674 if (obj_index >= 0) { 675 ciConstant con = get_resolved_constant(cpool, obj_index); 676 if (con.is_valid()) { 677 return con; 678 } 679 } 680 constantTag tag = cpool->tag_at(index); 681 if (tag.is_int()) { 682 return ciConstant(T_INT, (jint)cpool->int_at(index)); 683 } else if (tag.is_long()) { 684 return ciConstant((jlong)cpool->long_at(index)); 685 } else if (tag.is_float()) { 686 return ciConstant((jfloat)cpool->float_at(index)); 687 } else if (tag.is_double()) { 688 return ciConstant((jdouble)cpool->double_at(index)); 689 } else if (tag.is_string()) { 690 EXCEPTION_CONTEXT; 691 assert(obj_index >= 0, "should have an object index"); 692 oop string = cpool->string_at(index, obj_index, THREAD); 693 if (HAS_PENDING_EXCEPTION) { 694 CLEAR_PENDING_EXCEPTION; 695 record_out_of_memory_failure(); 696 return ciConstant(); 697 } 698 ciInstance* constant = get_object(string)->as_instance(); 699 return ciConstant(T_OBJECT, constant); 700 } else if (tag.is_unresolved_klass_in_error()) { 701 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr)); 702 } else if (tag.is_klass() || tag.is_unresolved_klass()) { 703 bool will_link; 704 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor); 705 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass)); 706 return ciConstant(T_OBJECT, mirror); 707 } else if (tag.is_method_type() || tag.is_method_type_in_error()) { 708 // must execute Java code to link this CP entry into cache[i].f1 709 assert(obj_index >= 0, "should have an object index"); 710 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index)); 711 ciObject* ciobj = get_unloaded_method_type_constant(signature); 712 return ciConstant(T_OBJECT, ciobj); 713 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) { 714 // must execute Java code to link this CP entry into cache[i].f1 715 assert(obj_index >= 0, "should have an object index"); 716 bool ignore_will_link; 717 int ref_kind = cpool->method_handle_ref_kind_at(index); 718 int callee_index = cpool->method_handle_klass_index_at(index); 719 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor); 720 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index)); 721 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index)); 722 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind); 723 return ciConstant(T_OBJECT, ciobj); 724 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) { 725 assert(obj_index >= 0, "should have an object index"); 726 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant 727 } else { 728 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name()); 729 return ciConstant(); 730 } 731 } 732 733 // ------------------------------------------------------------------ 734 // ciEnv::get_constant_by_index 735 // 736 // Pull a constant out of the constant pool. How appropriate. 737 // 738 // Implementation note: this query is currently in no way cached. 739 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool, 740 int pool_index, int cache_index, 741 ciInstanceKlass* accessor) { 742 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);) 743 } 744 745 // ------------------------------------------------------------------ 746 // ciEnv::get_field_by_index_impl 747 // 748 // Implementation of get_field_by_index. 749 // 750 // Implementation note: the results of field lookups are cached 751 // in the accessor klass. 752 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor, 753 int index, Bytecodes::Code bc) { 754 ciConstantPoolCache* cache = accessor->field_cache(); 755 if (cache == nullptr) { 756 ciField* field = new (arena()) ciField(accessor, index, bc); 757 return field; 758 } else { 759 ciField* field = (ciField*)cache->get(index); 760 if (field == nullptr) { 761 field = new (arena()) ciField(accessor, index, bc); 762 cache->insert(index, field); 763 } 764 return field; 765 } 766 } 767 768 // ------------------------------------------------------------------ 769 // ciEnv::get_field_by_index 770 // 771 // Get a field by index from a klass's constant pool. 772 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor, 773 int index, Bytecodes::Code bc) { 774 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);) 775 } 776 777 // ------------------------------------------------------------------ 778 // ciEnv::lookup_method 779 // 780 // Perform an appropriate method lookup based on accessor, holder, 781 // name, signature, and bytecode. 782 Method* ciEnv::lookup_method(ciInstanceKlass* accessor, 783 ciKlass* holder, 784 Symbol* name, 785 Symbol* sig, 786 Bytecodes::Code bc, 787 constantTag tag) { 788 InstanceKlass* accessor_klass = accessor->get_instanceKlass(); 789 Klass* holder_klass = holder->get_Klass(); 790 791 // Accessibility checks are performed in ciEnv::get_method_by_index_impl. 792 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible"); 793 794 LinkInfo link_info(holder_klass, name, sig, accessor_klass, 795 LinkInfo::AccessCheck::required, 796 LinkInfo::LoaderConstraintCheck::required, 797 tag); 798 switch (bc) { 799 case Bytecodes::_invokestatic: 800 return LinkResolver::resolve_static_call_or_null(link_info); 801 case Bytecodes::_invokespecial: 802 return LinkResolver::resolve_special_call_or_null(link_info); 803 case Bytecodes::_invokeinterface: 804 return LinkResolver::linktime_resolve_interface_method_or_null(link_info); 805 case Bytecodes::_invokevirtual: 806 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info); 807 default: 808 fatal("Unhandled bytecode: %s", Bytecodes::name(bc)); 809 return nullptr; // silence compiler warnings 810 } 811 } 812 813 814 // ------------------------------------------------------------------ 815 // ciEnv::get_method_by_index_impl 816 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool, 817 int index, Bytecodes::Code bc, 818 ciInstanceKlass* accessor) { 819 assert(cpool.not_null(), "need constant pool"); 820 assert(accessor != nullptr, "need origin of access"); 821 if (bc == Bytecodes::_invokedynamic) { 822 // FIXME: code generation could allow for null (unlinked) call site 823 // The call site could be made patchable as follows: 824 // Load the appendix argument from the constant pool. 825 // Test the appendix argument and jump to a known deopt routine if it is null. 826 // Jump through a patchable call site, which is initially a deopt routine. 827 // Patch the call site to the nmethod entry point of the static compiled lambda form. 828 // As with other two-component call sites, both values must be independently verified. 829 assert(index < cpool->cache()->resolved_indy_entries_length(), "impossible"); 830 Method* adapter = cpool->resolved_indy_entry_at(index)->method(); 831 // Resolved if the adapter is non null. 832 if (adapter != nullptr) { 833 return get_method(adapter); 834 } 835 836 // Fake a method that is equivalent to a declared method. 837 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass()); 838 ciSymbol* name = ciSymbols::invokeBasic_name(); 839 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc)); 840 return get_unloaded_method(holder, name, signature, accessor); 841 } else { 842 const int holder_index = cpool->klass_ref_index_at(index, bc); 843 bool holder_is_accessible; 844 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor); 845 846 // Get the method's name and signature. 847 Symbol* name_sym = cpool->name_ref_at(index, bc); 848 Symbol* sig_sym = cpool->signature_ref_at(index, bc); 849 850 if (cpool->has_preresolution() 851 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) && 852 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) { 853 // Short-circuit lookups for JSR 292-related call sites. 854 // That is, do not rely only on name-based lookups, because they may fail 855 // if the names are not resolvable in the boot class loader (7056328). 856 switch (bc) { 857 case Bytecodes::_invokevirtual: 858 case Bytecodes::_invokeinterface: 859 case Bytecodes::_invokespecial: 860 case Bytecodes::_invokestatic: 861 { 862 Method* m = ConstantPool::method_at_if_loaded(cpool, index); 863 if (m != nullptr) { 864 return get_method(m); 865 } 866 } 867 break; 868 default: 869 break; 870 } 871 } 872 873 if (holder_is_accessible) { // Our declared holder is loaded. 874 constantTag tag = cpool->tag_ref_at(index, bc); 875 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?"); 876 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag); 877 if (m != nullptr && 878 (bc == Bytecodes::_invokestatic 879 ? m->method_holder()->is_not_initialized() 880 : !m->method_holder()->is_loaded())) { 881 m = nullptr; 882 } 883 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) { 884 m = nullptr; 885 } 886 if (m != nullptr) { 887 // We found the method. 888 return get_method(m); 889 } 890 } 891 892 // Either the declared holder was not loaded, or the method could 893 // not be found. Create a dummy ciMethod to represent the failed 894 // lookup. 895 ciSymbol* name = get_symbol(name_sym); 896 ciSymbol* signature = get_symbol(sig_sym); 897 return get_unloaded_method(holder, name, signature, accessor); 898 } 899 } 900 901 902 // ------------------------------------------------------------------ 903 // ciEnv::get_instance_klass_for_declared_method_holder 904 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) { 905 // For the case of <array>.clone(), the method holder can be a ciArrayKlass 906 // instead of a ciInstanceKlass. For that case simply pretend that the 907 // declared holder is Object.clone since that's where the call will bottom out. 908 // A more correct fix would trickle out through many interfaces in CI, 909 // requiring ciInstanceKlass* to become ciKlass* and many more places would 910 // require checks to make sure the expected type was found. Given that this 911 // only occurs for clone() the more extensive fix seems like overkill so 912 // instead we simply smear the array type into Object. 913 guarantee(method_holder != nullptr, "no method holder"); 914 if (method_holder->is_instance_klass()) { 915 return method_holder->as_instance_klass(); 916 } else if (method_holder->is_array_klass()) { 917 return current()->Object_klass(); 918 } else { 919 ShouldNotReachHere(); 920 } 921 return nullptr; 922 } 923 924 925 // ------------------------------------------------------------------ 926 // ciEnv::get_method_by_index 927 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool, 928 int index, Bytecodes::Code bc, 929 ciInstanceKlass* accessor) { 930 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);) 931 } 932 933 934 // ------------------------------------------------------------------ 935 // ciEnv::name_buffer 936 char *ciEnv::name_buffer(int req_len) { 937 if (_name_buffer_len < req_len) { 938 if (_name_buffer == nullptr) { 939 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len); 940 _name_buffer_len = req_len; 941 } else { 942 _name_buffer = 943 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len); 944 _name_buffer_len = req_len; 945 } 946 } 947 return _name_buffer; 948 } 949 950 // ------------------------------------------------------------------ 951 // ciEnv::is_in_vm 952 bool ciEnv::is_in_vm() { 953 return JavaThread::current()->thread_state() == _thread_in_vm; 954 } 955 956 // ------------------------------------------------------------------ 957 // ciEnv::validate_compile_task_dependencies 958 // 959 // Check for changes during compilation (e.g. class loads, evolution, 960 // breakpoints, call site invalidation). 961 void ciEnv::validate_compile_task_dependencies(ciMethod* target) { 962 if (failing()) return; // no need for further checks 963 964 Dependencies::DepType result = dependencies()->validate_dependencies(_task); 965 if (result != Dependencies::end_marker) { 966 if (result == Dependencies::call_site_target_value) { 967 _inc_decompile_count_on_failure = false; 968 record_failure("call site target change"); 969 } else if (Dependencies::is_klass_type(result)) { 970 record_failure("concurrent class loading"); 971 } else { 972 record_failure("invalid non-klass dependency"); 973 } 974 } 975 } 976 977 // ------------------------------------------------------------------ 978 // ciEnv::register_method 979 void ciEnv::register_method(ciMethod* target, 980 int entry_bci, 981 CodeOffsets* offsets, 982 int orig_pc_offset, 983 CodeBuffer* code_buffer, 984 int frame_words, 985 OopMapSet* oop_map_set, 986 ExceptionHandlerTable* handler_table, 987 ImplicitExceptionTable* inc_table, 988 AbstractCompiler* compiler, 989 bool has_unsafe_access, 990 bool has_wide_vectors, 991 bool has_monitors, 992 bool has_scoped_access, 993 int immediate_oops_patched) { 994 VM_ENTRY_MARK; 995 nmethod* nm = nullptr; 996 { 997 methodHandle method(THREAD, target->get_Method()); 998 999 // We require method counters to store some method state (max compilation levels) required by the compilation policy. 1000 if (method->get_method_counters(THREAD) == nullptr) { 1001 record_failure("can't create method counters"); 1002 // All buffers in the CodeBuffer are allocated in the CodeCache. 1003 // If the code buffer is created on each compile attempt 1004 // as in C2, then it must be freed. 1005 code_buffer->free_blob(); 1006 return; 1007 } 1008 1009 // Check if memory should be freed before allocation 1010 CodeCache::gc_on_allocation(); 1011 1012 // To prevent compile queue updates. 1013 MutexLocker locker(THREAD, MethodCompileQueue_lock); 1014 1015 // Prevent InstanceKlass::add_to_hierarchy from running 1016 // and invalidating our dependencies until we install this method. 1017 // No safepoints are allowed. Otherwise, class redefinition can occur in between. 1018 MutexLocker ml(Compile_lock); 1019 NoSafepointVerifier nsv; 1020 1021 // Change in Jvmti state may invalidate compilation. 1022 if (!failing() && jvmti_state_changed()) { 1023 record_failure("Jvmti state change invalidated dependencies"); 1024 } 1025 1026 // Change in DTrace flags may invalidate compilation. 1027 if (!failing() && 1028 ( (!dtrace_method_probes() && DTraceMethodProbes) || 1029 (!dtrace_alloc_probes() && DTraceAllocProbes) )) { 1030 record_failure("DTrace flags change invalidated dependencies"); 1031 } 1032 1033 if (!failing() && target->needs_clinit_barrier() && 1034 target->holder()->is_in_error_state()) { 1035 record_failure("method holder is in error state"); 1036 } 1037 1038 if (!failing()) { 1039 if (log() != nullptr) { 1040 // Log the dependencies which this compilation declares. 1041 dependencies()->log_all_dependencies(); 1042 } 1043 1044 // Encode the dependencies now, so we can check them right away. 1045 dependencies()->encode_content_bytes(); 1046 1047 // Check for {class loads, evolution, breakpoints, ...} during compilation 1048 validate_compile_task_dependencies(target); 1049 } 1050 1051 if (failing()) { 1052 // While not a true deoptimization, it is a preemptive decompile. 1053 MethodData* mdo = method()->method_data(); 1054 if (mdo != nullptr && _inc_decompile_count_on_failure) { 1055 mdo->inc_decompile_count(); 1056 } 1057 1058 // All buffers in the CodeBuffer are allocated in the CodeCache. 1059 // If the code buffer is created on each compile attempt 1060 // as in C2, then it must be freed. 1061 code_buffer->free_blob(); 1062 return; 1063 } 1064 1065 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry"); 1066 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry"); 1067 1068 nm = nmethod::new_nmethod(method, 1069 compile_id(), 1070 entry_bci, 1071 offsets, 1072 orig_pc_offset, 1073 debug_info(), dependencies(), code_buffer, 1074 frame_words, oop_map_set, 1075 handler_table, inc_table, 1076 compiler, CompLevel(task()->comp_level())); 1077 1078 // Free codeBlobs 1079 code_buffer->free_blob(); 1080 1081 if (nm != nullptr) { 1082 nm->set_has_unsafe_access(has_unsafe_access); 1083 nm->set_has_wide_vectors(has_wide_vectors); 1084 nm->set_has_monitors(has_monitors); 1085 nm->set_has_scoped_access(has_scoped_access); 1086 assert(!method->is_synchronized() || nm->has_monitors(), ""); 1087 1088 if (entry_bci == InvocationEntryBci) { 1089 if (TieredCompilation) { 1090 // If there is an old version we're done with it 1091 nmethod* old = method->code(); 1092 if (TraceMethodReplacement && old != nullptr) { 1093 ResourceMark rm; 1094 char *method_name = method->name_and_sig_as_C_string(); 1095 tty->print_cr("Replacing method %s", method_name); 1096 } 1097 if (old != nullptr) { 1098 old->make_not_used(); 1099 } 1100 } 1101 1102 LogTarget(Info, nmethod, install) lt; 1103 if (lt.is_enabled()) { 1104 ResourceMark rm; 1105 char *method_name = method->name_and_sig_as_C_string(); 1106 lt.print("Installing method (%d) %s ", 1107 task()->comp_level(), method_name); 1108 } 1109 // Allow the code to be executed 1110 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag); 1111 if (nm->make_in_use()) { 1112 method->set_code(method, nm); 1113 } 1114 } else { 1115 LogTarget(Info, nmethod, install) lt; 1116 if (lt.is_enabled()) { 1117 ResourceMark rm; 1118 char *method_name = method->name_and_sig_as_C_string(); 1119 lt.print("Installing osr method (%d) %s @ %d", 1120 task()->comp_level(), method_name, entry_bci); 1121 } 1122 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag); 1123 if (nm->make_in_use()) { 1124 method->method_holder()->add_osr_nmethod(nm); 1125 } 1126 } 1127 } 1128 } 1129 1130 NoSafepointVerifier nsv; 1131 if (nm != nullptr) { 1132 // Compilation succeeded, post what we know about it 1133 nm->post_compiled_method(task()); 1134 task()->set_num_inlined_bytecodes(num_inlined_bytecodes()); 1135 } else { 1136 // The CodeCache is full. 1137 record_failure("code cache is full"); 1138 } 1139 1140 // safepoints are allowed again 1141 } 1142 1143 // ------------------------------------------------------------------ 1144 // ciEnv::find_system_klass 1145 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) { 1146 VM_ENTRY_MARK; 1147 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false); 1148 } 1149 1150 // ------------------------------------------------------------------ 1151 // ciEnv::comp_level 1152 int ciEnv::comp_level() { 1153 if (task() == nullptr) return CompilationPolicy::highest_compile_level(); 1154 return task()->comp_level(); 1155 } 1156 1157 // ------------------------------------------------------------------ 1158 // ciEnv::compile_id 1159 int ciEnv::compile_id() { 1160 if (task() == nullptr) return 0; 1161 return task()->compile_id(); 1162 } 1163 1164 // ------------------------------------------------------------------ 1165 // ciEnv::notice_inlined_method() 1166 void ciEnv::notice_inlined_method(ciMethod* method) { 1167 _num_inlined_bytecodes += method->code_size_for_inlining(); 1168 } 1169 1170 // ------------------------------------------------------------------ 1171 // ciEnv::num_inlined_bytecodes() 1172 int ciEnv::num_inlined_bytecodes() const { 1173 return _num_inlined_bytecodes; 1174 } 1175 1176 // ------------------------------------------------------------------ 1177 // ciEnv::record_failure() 1178 void ciEnv::record_failure(const char* reason) { 1179 if (_failure_reason.get() == nullptr) { 1180 // Record the first failure reason. 1181 _failure_reason.set(reason); 1182 } 1183 } 1184 1185 void ciEnv::report_failure(const char* reason) { 1186 EventCompilationFailure event; 1187 if (event.should_commit()) { 1188 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason); 1189 } 1190 } 1191 1192 // ------------------------------------------------------------------ 1193 // ciEnv::record_method_not_compilable() 1194 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) { 1195 int new_compilable = 1196 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ; 1197 1198 // Only note transitions to a worse state 1199 if (new_compilable > _compilable) { 1200 if (log() != nullptr) { 1201 if (all_tiers) { 1202 log()->elem("method_not_compilable"); 1203 } else { 1204 log()->elem("method_not_compilable_at_tier level='%d'", 1205 current()->task()->comp_level()); 1206 } 1207 } 1208 _compilable = new_compilable; 1209 1210 // Reset failure reason; this one is more important. 1211 _failure_reason.clear(); 1212 record_failure(reason); 1213 } 1214 } 1215 1216 // ------------------------------------------------------------------ 1217 // ciEnv::record_out_of_memory_failure() 1218 void ciEnv::record_out_of_memory_failure() { 1219 // If memory is low, we stop compiling methods. 1220 record_method_not_compilable("out of memory"); 1221 } 1222 1223 ciInstance* ciEnv::unloaded_ciinstance() { 1224 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();) 1225 } 1226 1227 // ------------------------------------------------------------------ 1228 // Replay support 1229 1230 1231 // Lookup location descriptor for the class, if any. 1232 // Returns false if not found. 1233 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const { 1234 bool found = false; 1235 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found); 1236 if (!found) { 1237 return false; 1238 } 1239 loc = _dyno_locs->at(pos); 1240 return found; 1241 } 1242 1243 // Associate the current location descriptor with the given class and record for later lookup. 1244 void ciEnv::set_dyno_loc(const InstanceKlass* ik) { 1245 const char *loc = os::strdup(_dyno_name); 1246 bool found = false; 1247 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found); 1248 if (found) { 1249 _dyno_locs->at_put(pos, loc); 1250 } else { 1251 _dyno_klasses->insert_before(pos, ik); 1252 _dyno_locs->insert_before(pos, loc); 1253 } 1254 } 1255 1256 // Associate the current location descriptor with the given class and record for later lookup. 1257 // If it turns out that there are multiple locations for the given class, that conflict should 1258 // be handled here. Currently we choose the first location found. 1259 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) { 1260 if (!ik->is_hidden()) { 1261 return; 1262 } 1263 const char *loc0; 1264 if (!dyno_loc(ik, loc0)) { 1265 set_dyno_loc(ik); 1266 } 1267 } 1268 1269 // Look up the location descriptor for the given class and print it to the output stream. 1270 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const { 1271 const char *loc; 1272 if (dyno_loc(ik, loc)) { 1273 out->print("%s", loc); 1274 return true; 1275 } else { 1276 return false; 1277 } 1278 } 1279 1280 // Look up the location descriptor for the given class and return it as a string. 1281 // Returns null if no location is found. 1282 const char *ciEnv::dyno_name(const InstanceKlass* ik) const { 1283 if (ik->is_hidden()) { 1284 stringStream ss; 1285 if (print_dyno_loc(&ss, ik)) { 1286 ss.print(" ;"); // add terminator 1287 const char* call_site = ss.as_string(); 1288 return call_site; 1289 } 1290 } 1291 return nullptr; 1292 } 1293 1294 // Look up the location descriptor for the given class and return it as a string. 1295 // Returns the class name as a fallback if no location is found. 1296 const char *ciEnv::replay_name(ciKlass* k) const { 1297 if (k->is_instance_klass()) { 1298 return replay_name(k->as_instance_klass()->get_instanceKlass()); 1299 } 1300 return k->name()->as_quoted_ascii(); 1301 } 1302 1303 // Look up the location descriptor for the given class and return it as a string. 1304 // Returns the class name as a fallback if no location is found. 1305 const char *ciEnv::replay_name(const InstanceKlass* ik) const { 1306 const char* name = dyno_name(ik); 1307 if (name != nullptr) { 1308 return name; 1309 } 1310 return ik->name()->as_quoted_ascii(); 1311 } 1312 1313 // Process a java.lang.invoke.MemberName object and record any dynamic locations. 1314 void ciEnv::record_member(Thread* thread, oop member) { 1315 assert(java_lang_invoke_MemberName::is_instance(member), "!"); 1316 // Check MemberName.clazz field 1317 oop clazz = java_lang_invoke_MemberName::clazz(member); 1318 if (clazz->klass()->is_instance_klass()) { 1319 RecordLocation fp(this, "clazz"); 1320 InstanceKlass* ik = InstanceKlass::cast(clazz->klass()); 1321 record_best_dyno_loc(ik); 1322 } 1323 // Check MemberName.method.vmtarget field 1324 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member); 1325 if (vmtarget != nullptr) { 1326 RecordLocation fp2(this, "<vmtarget>"); 1327 InstanceKlass* ik = vmtarget->method_holder(); 1328 record_best_dyno_loc(ik); 1329 } 1330 } 1331 1332 // Read an object field. Lookup is done by name only. 1333 static inline oop obj_field(oop obj, const char* name) { 1334 return ciReplay::obj_field(obj, name); 1335 } 1336 1337 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations. 1338 void ciEnv::record_lambdaform(Thread* thread, oop form) { 1339 assert(java_lang_invoke_LambdaForm::is_instance(form), "!"); 1340 1341 { 1342 // Check LambdaForm.vmentry field 1343 oop member = java_lang_invoke_LambdaForm::vmentry(form); 1344 RecordLocation fp0(this, "vmentry"); 1345 record_member(thread, member); 1346 } 1347 1348 // Check LambdaForm.names array 1349 objArrayOop names = (objArrayOop)obj_field(form, "names"); 1350 if (names != nullptr) { 1351 RecordLocation lp0(this, "names"); 1352 int len = names->length(); 1353 for (int i = 0; i < len; ++i) { 1354 oop name = names->obj_at(i); 1355 RecordLocation lp1(this, "%d", i); 1356 // Check LambdaForm.names[i].function field 1357 RecordLocation lp2(this, "function"); 1358 oop function = obj_field(name, "function"); 1359 if (function != nullptr) { 1360 // Check LambdaForm.names[i].function.member field 1361 oop member = obj_field(function, "member"); 1362 if (member != nullptr) { 1363 RecordLocation lp3(this, "member"); 1364 record_member(thread, member); 1365 } 1366 // Check LambdaForm.names[i].function.resolvedHandle field 1367 oop mh = obj_field(function, "resolvedHandle"); 1368 if (mh != nullptr) { 1369 RecordLocation lp3(this, "resolvedHandle"); 1370 record_mh(thread, mh); 1371 } 1372 // Check LambdaForm.names[i].function.invoker field 1373 oop invoker = obj_field(function, "invoker"); 1374 if (invoker != nullptr) { 1375 RecordLocation lp3(this, "invoker"); 1376 record_mh(thread, invoker); 1377 } 1378 } 1379 } 1380 } 1381 } 1382 1383 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations. 1384 void ciEnv::record_mh(Thread* thread, oop mh) { 1385 { 1386 // Check MethodHandle.form field 1387 oop form = java_lang_invoke_MethodHandle::form(mh); 1388 RecordLocation fp(this, "form"); 1389 record_lambdaform(thread, form); 1390 } 1391 // Check DirectMethodHandle.member field 1392 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) { 1393 oop member = java_lang_invoke_DirectMethodHandle::member(mh); 1394 RecordLocation fp(this, "member"); 1395 record_member(thread, member); 1396 } else { 1397 // Check <MethodHandle subclass>.argL<n> fields 1398 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists 1399 char arg_name[] = "argLXX"; 1400 int max_arg = 99; 1401 for (int index = 0; index <= max_arg; ++index) { 1402 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index); 1403 oop arg = obj_field(mh, arg_name); 1404 if (arg != nullptr) { 1405 RecordLocation fp(this, "%s", arg_name); 1406 if (arg->klass()->is_instance_klass()) { 1407 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass()); 1408 record_best_dyno_loc(ik2); 1409 record_call_site_obj(thread, arg); 1410 } 1411 } else { 1412 break; 1413 } 1414 } 1415 } 1416 } 1417 1418 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations. 1419 // Types currently supported are MethodHandle and CallSite. 1420 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object. 1421 void ciEnv::record_call_site_obj(Thread* thread, oop obj) 1422 { 1423 if (obj != nullptr) { 1424 if (java_lang_invoke_MethodHandle::is_instance(obj)) { 1425 record_mh(thread, obj); 1426 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) { 1427 oop target = java_lang_invoke_CallSite::target(obj); 1428 if (target->klass()->is_instance_klass()) { 1429 RecordLocation fp(this, "target"); 1430 InstanceKlass* ik = InstanceKlass::cast(target->klass()); 1431 record_best_dyno_loc(ik); 1432 } 1433 } 1434 } 1435 } 1436 1437 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations. 1438 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) { 1439 InstanceKlass* holder = adapter->method_holder(); 1440 if (!holder->is_hidden()) { 1441 return; 1442 } 1443 RecordLocation fp(this, "<adapter>"); 1444 record_best_dyno_loc(holder); 1445 } 1446 1447 // Process an invokedynamic call site and record any dynamic locations. 1448 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) { 1449 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(indy_index); 1450 if (indy_info->method() != nullptr) { 1451 // process the adapter 1452 Method* adapter = indy_info->method(); 1453 record_call_site_method(thread, adapter); 1454 // process the appendix 1455 oop appendix = cp->resolved_reference_from_indy(indy_index); 1456 { 1457 RecordLocation fp(this, "<appendix>"); 1458 record_call_site_obj(thread, appendix); 1459 } 1460 // process the BSM 1461 int pool_index = indy_info->constant_pool_index(); 1462 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index); 1463 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread); 1464 { 1465 RecordLocation fp(this, "<bsm>"); 1466 record_call_site_obj(thread, bsm); 1467 } 1468 } 1469 } 1470 1471 // Process an invokehandle call site and record any dynamic locations. 1472 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) { 1473 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle); 1474 if (!cp->tag_at(holder_index).is_klass()) { 1475 return; // not resolved 1476 } 1477 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index); 1478 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle); 1479 if (MethodHandles::is_signature_polymorphic_name(holder, name)) { 1480 ResolvedMethodEntry* method_entry = cp->resolved_method_entry_at(index); 1481 if (method_entry->is_resolved(Bytecodes::_invokehandle)) { 1482 // process the adapter 1483 Method* adapter = method_entry->method(); 1484 oop appendix = cp->cache()->appendix_if_resolved(method_entry); 1485 record_call_site_method(thread, adapter); 1486 // process the appendix 1487 { 1488 RecordLocation fp(this, "<appendix>"); 1489 record_call_site_obj(thread, appendix); 1490 } 1491 } 1492 } 1493 } 1494 1495 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or 1496 // constant pool entries and record for future lookup. 1497 void ciEnv::find_dynamic_call_sites() { 1498 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr); 1499 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr); 1500 1501 // Iterate over the class hierarchy 1502 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) { 1503 Klass* sub = iter.klass(); 1504 if (sub->is_instance_klass()) { 1505 InstanceKlass *isub = InstanceKlass::cast(sub); 1506 InstanceKlass* ik = isub; 1507 if (!ik->is_linked()) { 1508 continue; 1509 } 1510 if (ik->is_hidden()) { 1511 continue; 1512 } 1513 JavaThread* thread = JavaThread::current(); 1514 const constantPoolHandle pool(thread, ik->constants()); 1515 1516 // Look for invokedynamic/invokehandle call sites 1517 for (int i = 0; i < ik->methods()->length(); ++i) { 1518 Method* m = ik->methods()->at(i); 1519 1520 BytecodeStream bcs(methodHandle(thread, m)); 1521 while (!bcs.is_last_bytecode()) { 1522 Bytecodes::Code opcode = bcs.next(); 1523 opcode = bcs.raw_code(); 1524 switch (opcode) { 1525 case Bytecodes::_invokedynamic: 1526 case Bytecodes::_invokehandle: { 1527 RecordLocation fp(this, "@bci %s %s %s %d", 1528 ik->name()->as_quoted_ascii(), 1529 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(), 1530 bcs.bci()); 1531 if (opcode == Bytecodes::_invokedynamic) { 1532 int index = bcs.get_index_u4(); 1533 process_invokedynamic(pool, index, thread); 1534 } else { 1535 assert(opcode == Bytecodes::_invokehandle, "new switch label added?"); 1536 int cp_cache_index = bcs.get_index_u2(); 1537 process_invokehandle(pool, cp_cache_index, thread); 1538 } 1539 break; 1540 } 1541 default: 1542 break; 1543 } 1544 } 1545 } 1546 1547 // Look for MethodHandle constant pool entries 1548 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii()); 1549 int len = pool->length(); 1550 for (int i = 0; i < len; ++i) { 1551 if (pool->tag_at(i).is_method_handle()) { 1552 bool found_it; 1553 oop mh = pool->find_cached_constant_at(i, found_it, thread); 1554 if (mh != nullptr) { 1555 RecordLocation fp(this, "%d", i); 1556 record_mh(thread, mh); 1557 } 1558 } 1559 } 1560 } 1561 } 1562 } 1563 1564 void ciEnv::dump_compile_data(outputStream* out) { 1565 CompileTask* task = this->task(); 1566 if (task) { 1567 #ifdef COMPILER2 1568 if (ReplayReduce && compiler_data() != nullptr) { 1569 // Dump C2 "reduced" inlining data. 1570 ((Compile*)compiler_data())->dump_inline_data_reduced(out); 1571 } 1572 #endif 1573 Method* method = task->method(); 1574 int entry_bci = task->osr_bci(); 1575 int comp_level = task->comp_level(); 1576 out->print("compile "); 1577 get_method(method)->dump_name_as_ascii(out); 1578 out->print(" %d %d", entry_bci, comp_level); 1579 if (compiler_data() != nullptr) { 1580 if (is_c2_compile(comp_level)) { 1581 #ifdef COMPILER2 1582 // Dump C2 inlining data. 1583 ((Compile*)compiler_data())->dump_inline_data(out); 1584 #endif 1585 } else if (is_c1_compile(comp_level)) { 1586 #ifdef COMPILER1 1587 // Dump C1 inlining data. 1588 ((Compilation*)compiler_data())->dump_inline_data(out); 1589 #endif 1590 } 1591 } 1592 out->cr(); 1593 } 1594 } 1595 1596 // Called from VM error reporter, so be careful. 1597 // Don't safepoint or acquire any locks. 1598 // 1599 void ciEnv::dump_replay_data_helper(outputStream* out) { 1600 NoSafepointVerifier no_safepoint; 1601 ResourceMark rm; 1602 1603 assert(this->task() != nullptr, "task must not be null"); 1604 1605 dump_replay_data_version(out); 1606 #if INCLUDE_JVMTI 1607 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables); 1608 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint); 1609 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions); 1610 #endif // INCLUDE_JVMTI 1611 1612 find_dynamic_call_sites(); 1613 1614 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata(); 1615 out->print_cr("# %d ciObject found", objects->length()); 1616 1617 // The very first entry is the InstanceKlass of the root method of the current compilation. 1618 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder()); 1619 1620 for (int i = 0; i < objects->length(); i++) { 1621 objects->at(i)->dump_replay_data(out); 1622 } 1623 1624 dump_compile_data(out); 1625 out->flush(); 1626 } 1627 1628 // Called from VM error reporter, so be careful. 1629 // Don't safepoint or acquire any locks. 1630 // 1631 void ciEnv::dump_replay_data_unsafe(outputStream* out) { 1632 GUARDED_VM_ENTRY( 1633 dump_replay_data_helper(out); 1634 ) 1635 } 1636 1637 void ciEnv::dump_replay_data(outputStream* out) { 1638 GUARDED_VM_ENTRY( 1639 MutexLocker ml(Compile_lock); 1640 dump_replay_data_helper(out); 1641 ) 1642 } 1643 1644 void ciEnv::dump_replay_data(int compile_id) { 1645 char buffer[64]; 1646 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id); 1647 if (ret > 0) { 1648 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666); 1649 if (fd != -1) { 1650 FILE* replay_data_file = os::fdopen(fd, "w"); 1651 if (replay_data_file != nullptr) { 1652 fileStream replay_data_stream(replay_data_file, /*need_close=*/true); 1653 dump_replay_data(&replay_data_stream); 1654 tty->print_cr("# Compiler replay data is saved as: %s", buffer); 1655 } else { 1656 tty->print_cr("# Can't open file to dump replay data."); 1657 close(fd); 1658 } 1659 } 1660 } 1661 } 1662 1663 void ciEnv::dump_inline_data(int compile_id) { 1664 char buffer[64]; 1665 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id); 1666 if (ret > 0) { 1667 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666); 1668 if (fd != -1) { 1669 FILE* inline_data_file = os::fdopen(fd, "w"); 1670 if (inline_data_file != nullptr) { 1671 fileStream replay_data_stream(inline_data_file, /*need_close=*/true); 1672 GUARDED_VM_ENTRY( 1673 MutexLocker ml(Compile_lock); 1674 dump_replay_data_version(&replay_data_stream); 1675 dump_compile_data(&replay_data_stream); 1676 ) 1677 replay_data_stream.flush(); 1678 tty->print("# Compiler inline data is saved as: "); 1679 tty->print_cr("%s", buffer); 1680 } else { 1681 tty->print_cr("# Can't open file to dump inline data."); 1682 close(fd); 1683 } 1684 } 1685 } 1686 } 1687 1688 void ciEnv::dump_replay_data_version(outputStream* out) { 1689 out->print_cr("version %d", REPLAY_VERSION); 1690 } --- EOF ---