1 /* 2 * Copyright (c) 1997, 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 #ifndef SHARE_CODE_NMETHOD_HPP 26 #define SHARE_CODE_NMETHOD_HPP 27 28 #include "code/codeBlob.hpp" 29 #include "code/pcDesc.hpp" 30 #include "oops/metadata.hpp" 31 #include "oops/method.hpp" 32 #include "runtime/mutexLocker.hpp" 33 34 class AbstractCompiler; 35 class CompiledDirectCall; 36 class CompiledIC; 37 class CompiledICData; 38 class CompileTask; 39 class DepChange; 40 class Dependencies; 41 class DirectiveSet; 42 class DebugInformationRecorder; 43 class ExceptionHandlerTable; 44 class ImplicitExceptionTable; 45 class JvmtiThreadState; 46 class MetadataClosure; 47 class NativeCallWrapper; 48 class OopIterateClosure; 49 class AOTCodeReader; 50 class AOTCodeEntry; 51 class ScopeDesc; 52 class xmlStream; 53 54 // This class is used internally by nmethods, to cache 55 // exception/pc/handler information. 56 57 class ExceptionCache : public CHeapObj<mtCode> { 58 friend class VMStructs; 59 private: 60 enum { cache_size = 16 }; 61 Klass* _exception_type; 62 address _pc[cache_size]; 63 address _handler[cache_size]; 64 volatile int _count; 65 ExceptionCache* volatile _next; 66 ExceptionCache* _purge_list_next; 67 68 inline address pc_at(int index); 69 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } 70 71 inline address handler_at(int index); 72 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } 73 74 inline int count(); 75 // increment_count is only called under lock, but there may be concurrent readers. 76 void increment_count(); 77 78 public: 79 80 ExceptionCache(Handle exception, address pc, address handler); 81 82 Klass* exception_type() { return _exception_type; } 83 ExceptionCache* next(); 84 void set_next(ExceptionCache *ec); 85 ExceptionCache* purge_list_next() { return _purge_list_next; } 86 void set_purge_list_next(ExceptionCache *ec) { _purge_list_next = ec; } 87 88 address match(Handle exception, address pc); 89 bool match_exception_with_space(Handle exception) ; 90 address test_address(address addr); 91 bool add_address_and_handler(address addr, address handler) ; 92 }; 93 94 // cache pc descs found in earlier inquiries 95 class PcDescCache { 96 private: 97 enum { cache_size = 4 }; 98 // The array elements MUST be volatile! Several threads may modify 99 // and read from the cache concurrently. find_pc_desc_internal has 100 // returned wrong results. C++ compiler (namely xlC12) may duplicate 101 // C++ field accesses if the elements are not volatile. 102 typedef PcDesc* PcDescPtr; 103 volatile PcDescPtr _pc_descs[cache_size]; // last cache_size pc_descs found 104 public: 105 PcDescCache() { DEBUG_ONLY(_pc_descs[0] = nullptr); } 106 void init_to(PcDesc* initial_pc_desc); 107 PcDesc* find_pc_desc(int pc_offset, bool approximate); 108 void add_pc_desc(PcDesc* pc_desc); 109 PcDesc* last_pc_desc() { return _pc_descs[0]; } 110 }; 111 112 class PcDescContainer : public CHeapObj<mtCode> { 113 private: 114 PcDescCache _pc_desc_cache; 115 public: 116 PcDescContainer(PcDesc* initial_pc_desc) { _pc_desc_cache.init_to(initial_pc_desc); } 117 118 PcDesc* find_pc_desc_internal(address pc, bool approximate, address code_begin, 119 PcDesc* lower, PcDesc* upper); 120 121 PcDesc* find_pc_desc(address pc, bool approximate, address code_begin, PcDesc* lower, PcDesc* upper) 122 #ifdef PRODUCT 123 { 124 PcDesc* desc = _pc_desc_cache.last_pc_desc(); 125 assert(desc != nullptr, "PcDesc cache should be initialized already"); 126 if (desc->pc_offset() == (pc - code_begin)) { 127 // Cached value matched 128 return desc; 129 } 130 return find_pc_desc_internal(pc, approximate, code_begin, lower, upper); 131 } 132 #endif 133 ; 134 }; 135 136 // nmethods (native methods) are the compiled code versions of Java methods. 137 // 138 // An nmethod contains: 139 // - Header (the nmethod structure) 140 // - Constant part (doubles, longs and floats used in nmethod) 141 // - Code part: 142 // - Code body 143 // - Exception handler 144 // - Stub code 145 // - OOP table 146 // 147 // As a CodeBlob, an nmethod references [mutable data] allocated on the C heap: 148 // - CodeBlob relocation data 149 // - Metainfo 150 // - JVMCI data 151 // 152 // An nmethod references [immutable data] allocated on C heap: 153 // - Dependency assertions data 154 // - Implicit null table array 155 // - Handler entry point array 156 // - Debugging information: 157 // - Scopes data array 158 // - Scopes pcs array 159 // - JVMCI speculations array 160 // - Nmethod reference counter 161 162 #if INCLUDE_JVMCI 163 class FailedSpeculation; 164 class JVMCINMethodData; 165 #endif 166 167 class nmethod : public CodeBlob { 168 friend class VMStructs; 169 friend class JVMCIVMStructs; 170 friend class CodeCache; // scavengable oops 171 friend class JVMCINMethodData; 172 friend class DeoptimizationScope; 173 174 #define ImmutableDataRefCountSize ((int)sizeof(int)) 175 176 private: 177 178 // Used to track in which deoptimize handshake this method will be deoptimized. 179 uint64_t _deoptimization_generation; 180 181 uint64_t _gc_epoch; 182 183 // Profiling counter used to figure out the hottest nmethods to record into CDS 184 volatile uint64_t _method_profiling_count; 185 186 Method* _method; 187 188 // To reduce header size union fields which usages do not overlap. 189 union { 190 // To support simple linked-list chaining of nmethods: 191 nmethod* _osr_link; // from InstanceKlass::osr_nmethods_head 192 struct { 193 // These are used for compiled synchronized native methods to 194 // locate the owner and stack slot for the BasicLock. They are 195 // needed because there is no debug information for compiled native 196 // wrappers and the oop maps are insufficient to allow 197 // frame::retrieve_receiver() to work. Currently they are expected 198 // to be byte offsets from the Java stack pointer for maximum code 199 // sharing between platforms. JVMTI's GetLocalInstance() uses these 200 // offsets to find the receiver for non-static native wrapper frames. 201 ByteSize _native_receiver_sp_offset; 202 ByteSize _native_basic_lock_sp_offset; 203 }; 204 }; 205 206 // nmethod's read-only data 207 address _immutable_data; 208 209 PcDescContainer* _pc_desc_container; 210 ExceptionCache* volatile _exception_cache; 211 212 void* _gc_data; 213 214 struct oops_do_mark_link; // Opaque data type. 215 static nmethod* volatile _oops_do_mark_nmethods; 216 oops_do_mark_link* volatile _oops_do_mark_link; 217 218 CompiledICData* _compiled_ic_data; 219 220 AOTCodeEntry* _aot_code_entry; 221 222 // offsets for entry points 223 address _osr_entry_point; // entry point for on stack replacement 224 uint16_t _entry_offset; // entry point with class check 225 uint16_t _verified_entry_offset; // entry point without class check 226 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method 227 int _immutable_data_size; 228 229 // _consts_offset == _content_offset because SECT_CONSTS is first in code buffer 230 231 int _skipped_instructions_size; 232 233 int _stub_offset; 234 235 // Offsets for different stubs section parts 236 int _exception_offset; 237 // All deoptee's will resume execution at this location described by 238 // this offset. 239 int _deopt_handler_entry_offset; 240 // Offset (from insts_end) of the unwind handler if it exists 241 int16_t _unwind_handler_offset; 242 // Number of arguments passed on the stack 243 uint16_t _num_stack_arg_slots; 244 245 uint16_t _oops_size; 246 #if INCLUDE_JVMCI 247 // _metadata_size is not specific to JVMCI. In the non-JVMCI case, it can be derived as: 248 // _metadata_size = mutable_data_size - relocation_size 249 uint16_t _metadata_size; 250 #endif 251 252 // Offset in immutable data section 253 // _dependencies_offset == 0 254 uint16_t _nul_chk_table_offset; 255 uint16_t _handler_table_offset; // This table could be big in C1 code 256 int _scopes_pcs_offset; 257 int _scopes_data_offset; 258 #if INCLUDE_JVMCI 259 int _speculations_offset; 260 #endif 261 int _immutable_data_ref_count_offset; 262 263 // location in frame (offset for sp) that deopt can store the original 264 // pc during a deopt. 265 int _orig_pc_offset; 266 267 int _compile_id; // which compilation made this nmethod 268 CompLevel _comp_level; // compilation level (s1) 269 CompilerType _compiler_type; // which compiler made this nmethod (u1) 270 271 bool _used; // has this nmethod ever been invoked? 272 273 // Local state used to keep track of whether unloading is happening or not 274 volatile uint8_t _is_unloading_state; 275 276 // Protected by NMethodState_lock 277 volatile signed char _state; // {not_installed, in_use, not_entrant} 278 279 // set during construction 280 uint8_t _has_unsafe_access:1, // May fault due to unsafe access. 281 _has_wide_vectors:1, // Preserve wide vectors at safepoints 282 _has_monitors:1, // Fastpath monitor detection for continuations 283 _has_scoped_access:1, // used by for shared scope closure (scopedMemoryAccess.cpp) 284 _has_flushed_dependencies:1, // Used for maintenance of dependencies (under CodeCache_lock) 285 _is_unlinked:1, // mark during class unloading 286 _load_reported:1, // used by jvmti to track if an event has been posted for this nmethod 287 _preloaded:1, 288 _has_clinit_barriers:1; 289 290 enum DeoptimizationStatus : u1 { 291 not_marked, 292 deoptimize, 293 deoptimize_noupdate, 294 deoptimize_done 295 }; 296 297 volatile DeoptimizationStatus _deoptimization_status; // Used for stack deoptimization 298 299 DeoptimizationStatus deoptimization_status() const { 300 return AtomicAccess::load(&_deoptimization_status); 301 } 302 303 // Initialize fields to their default values 304 void init_defaults(CodeBuffer *code_buffer, CodeOffsets* offsets); 305 306 // Post initialization 307 void post_init(); 308 309 // For native wrappers 310 nmethod(Method* method, 311 CompilerType type, 312 int nmethod_size, 313 int compile_id, 314 CodeOffsets* offsets, 315 CodeBuffer *code_buffer, 316 int frame_size, 317 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ 318 ByteSize basic_lock_sp_offset, /* synchronized natives only */ 319 OopMapSet* oop_maps, 320 int mutable_data_size); 321 322 // For normal JIT compiled code 323 nmethod(Method* method, 324 CompilerType type, 325 int nmethod_size, 326 int immutable_data_size, 327 int mutable_data_size, 328 int compile_id, 329 int entry_bci, 330 address immutable_data, 331 CodeOffsets* offsets, 332 int orig_pc_offset, 333 DebugInformationRecorder *recorder, 334 Dependencies* dependencies, 335 CodeBuffer *code_buffer, 336 int frame_size, 337 OopMapSet* oop_maps, 338 ExceptionHandlerTable* handler_table, 339 ImplicitExceptionTable* nul_chk_table, 340 AbstractCompiler* compiler, 341 CompLevel comp_level 342 #if INCLUDE_JVMCI 343 , char* speculations = nullptr, 344 int speculations_len = 0, 345 JVMCINMethodData* jvmci_data = nullptr 346 #endif 347 ); 348 349 nmethod(const nmethod &nm); 350 351 // helper methods 352 void* operator new(size_t size, int nmethod_size, int comp_level) throw(); 353 void* operator new(size_t size, int nmethod_size, CodeBlobType code_blob_type) throw(); 354 355 // For method handle intrinsics: Try MethodNonProfiled, MethodProfiled and NonNMethod. 356 // Attention: Only allow NonNMethod space for special nmethods which don't need to be 357 // findable by nmethod iterators! In particular, they must not contain oops! 358 void* operator new(size_t size, int nmethod_size, bool allow_NonNMethod_space) throw(); 359 360 const char* reloc_string_for(u_char* begin, u_char* end); 361 362 bool try_transition(signed char new_state); 363 364 // Returns true if this thread changed the state of the nmethod or 365 // false if another thread performed the transition. 366 bool make_entrant() { Unimplemented(); return false; } 367 void inc_decompile_count(); 368 369 // Inform external interfaces that a compiled method has been unloaded 370 void post_compiled_method_unload(); 371 372 PcDesc* find_pc_desc(address pc, bool approximate) { 373 if (_pc_desc_container == nullptr) return nullptr; // native method 374 return _pc_desc_container->find_pc_desc(pc, approximate, code_begin(), scopes_pcs_begin(), scopes_pcs_end()); 375 } 376 377 // STW two-phase nmethod root processing helpers. 378 // 379 // When determining liveness of a given nmethod to do code cache unloading, 380 // some collectors need to do different things depending on whether the nmethods 381 // need to absolutely be kept alive during root processing; "strong"ly reachable 382 // nmethods are known to be kept alive at root processing, but the liveness of 383 // "weak"ly reachable ones is to be determined later. 384 // 385 // We want to allow strong and weak processing of nmethods by different threads 386 // at the same time without heavy synchronization. Additional constraints are 387 // to make sure that every nmethod is processed a minimal amount of time, and 388 // nmethods themselves are always iterated at most once at a particular time. 389 // 390 // Note that strong processing work must be a superset of weak processing work 391 // for this code to work. 392 // 393 // We store state and claim information in the _oops_do_mark_link member, using 394 // the two LSBs for the state and the remaining upper bits for linking together 395 // nmethods that were already visited. 396 // The last element is self-looped, i.e. points to itself to avoid some special 397 // "end-of-list" sentinel value. 398 // 399 // _oops_do_mark_link special values: 400 // 401 // _oops_do_mark_link == nullptr: the nmethod has not been visited at all yet, i.e. 402 // is Unclaimed. 403 // 404 // For other values, its lowest two bits indicate the following states of the nmethod: 405 // 406 // weak_request (WR): the nmethod has been claimed by a thread for weak processing 407 // weak_done (WD): weak processing has been completed for this nmethod. 408 // strong_request (SR): the nmethod has been found to need strong processing while 409 // being weak processed. 410 // strong_done (SD): strong processing has been completed for this nmethod . 411 // 412 // The following shows the _only_ possible progressions of the _oops_do_mark_link 413 // pointer. 414 // 415 // Given 416 // N as the nmethod 417 // X the current next value of _oops_do_mark_link 418 // 419 // Unclaimed (C)-> N|WR (C)-> X|WD: the nmethod has been processed weakly by 420 // a single thread. 421 // Unclaimed (C)-> N|WR (C)-> X|WD (O)-> X|SD: after weak processing has been 422 // completed (as above) another thread found that the nmethod needs strong 423 // processing after all. 424 // Unclaimed (C)-> N|WR (O)-> N|SR (C)-> X|SD: during weak processing another 425 // thread finds that the nmethod needs strong processing, marks it as such and 426 // terminates. The original thread completes strong processing. 427 // Unclaimed (C)-> N|SD (C)-> X|SD: the nmethod has been processed strongly from 428 // the beginning by a single thread. 429 // 430 // "|" describes the concatenation of bits in _oops_do_mark_link. 431 // 432 // The diagram also describes the threads responsible for changing the nmethod to 433 // the next state by marking the _transition_ with (C) and (O), which mean "current" 434 // and "other" thread respectively. 435 // 436 437 // States used for claiming nmethods during root processing. 438 static const uint claim_weak_request_tag = 0; 439 static const uint claim_weak_done_tag = 1; 440 static const uint claim_strong_request_tag = 2; 441 static const uint claim_strong_done_tag = 3; 442 443 static oops_do_mark_link* mark_link(nmethod* nm, uint tag) { 444 assert(tag <= claim_strong_done_tag, "invalid tag %u", tag); 445 assert(is_aligned(nm, 4), "nmethod pointer must have zero lower two LSB"); 446 return (oops_do_mark_link*)(((uintptr_t)nm & ~0x3) | tag); 447 } 448 449 static uint extract_state(oops_do_mark_link* link) { 450 return (uint)((uintptr_t)link & 0x3); 451 } 452 453 static nmethod* extract_nmethod(oops_do_mark_link* link) { 454 return (nmethod*)((uintptr_t)link & ~0x3); 455 } 456 457 void oops_do_log_change(const char* state); 458 459 static bool oops_do_has_weak_request(oops_do_mark_link* next) { 460 return extract_state(next) == claim_weak_request_tag; 461 } 462 463 static bool oops_do_has_any_strong_state(oops_do_mark_link* next) { 464 return extract_state(next) >= claim_strong_request_tag; 465 } 466 467 // Attempt Unclaimed -> N|WR transition. Returns true if successful. 468 bool oops_do_try_claim_weak_request(); 469 470 // Attempt Unclaimed -> N|SD transition. Returns the current link. 471 oops_do_mark_link* oops_do_try_claim_strong_done(); 472 // Attempt N|WR -> X|WD transition. Returns nullptr if successful, X otherwise. 473 nmethod* oops_do_try_add_to_list_as_weak_done(); 474 475 // Attempt X|WD -> N|SR transition. Returns the current link. 476 oops_do_mark_link* oops_do_try_add_strong_request(oops_do_mark_link* next); 477 // Attempt X|WD -> X|SD transition. Returns true if successful. 478 bool oops_do_try_claim_weak_done_as_strong_done(oops_do_mark_link* next); 479 480 // Do the N|SD -> X|SD transition. 481 void oops_do_add_to_list_as_strong_done(); 482 483 // Sets this nmethod as strongly claimed (as part of N|SD -> X|SD and N|SR -> X|SD 484 // transitions). 485 void oops_do_set_strong_done(nmethod* old_head); 486 487 void record_nmethod_dependency(); 488 489 nmethod* restore(address code_cache_buffer, 490 const methodHandle& method, 491 int compile_id, 492 address reloc_data, 493 GrowableArray<Handle>& oop_list, 494 GrowableArray<Metadata*>& metadata_list, 495 ImmutableOopMapSet* oop_maps, 496 address immutable_data, 497 GrowableArray<Handle>& reloc_imm_oop_list, 498 GrowableArray<Metadata*>& reloc_imm_metadata_list, 499 AOTCodeReader* aot_code_reader); 500 501 public: 502 // create nmethod using archived nmethod from AOT code cache 503 static nmethod* new_nmethod(nmethod* archived_nm, 504 const methodHandle& method, 505 AbstractCompiler* compiler, 506 int compile_id, 507 address reloc_data, 508 GrowableArray<Handle>& oop_list, 509 GrowableArray<Metadata*>& metadata_list, 510 ImmutableOopMapSet* oop_maps, 511 address immutable_data, 512 GrowableArray<Handle>& reloc_imm_oop_list, 513 GrowableArray<Metadata*>& reloc_imm_metadata_list, 514 AOTCodeReader* aot_code_reader); 515 516 // If you change anything in this enum please patch 517 // vmStructs_jvmci.cpp accordingly. 518 enum class InvalidationReason : s1 { 519 NOT_INVALIDATED = -1, 520 C1_CODEPATCH, 521 C1_DEOPTIMIZE, 522 C1_DEOPTIMIZE_FOR_PATCHING, 523 C1_PREDICATE_FAILED_TRAP, 524 CI_REPLAY, 525 UNLOADING, 526 UNLOADING_COLD, 527 JVMCI_INVALIDATE, 528 JVMCI_MATERIALIZE_VIRTUAL_OBJECT, 529 JVMCI_REPLACED_WITH_NEW_CODE, 530 JVMCI_REPROFILE, 531 MARKED_FOR_DEOPTIMIZATION, 532 MISSING_EXCEPTION_HANDLER, 533 NOT_USED, 534 OSR_INVALIDATION_BACK_BRANCH, 535 OSR_INVALIDATION_FOR_COMPILING_WITH_C1, 536 OSR_INVALIDATION_OF_LOWER_LEVEL, 537 SET_NATIVE_FUNCTION, 538 UNCOMMON_TRAP, 539 WHITEBOX_DEOPTIMIZATION, 540 ZOMBIE, 541 RELOCATED, 542 INVALIDATION_REASONS_COUNT 543 }; 544 545 546 static const char* invalidation_reason_to_string(InvalidationReason invalidation_reason) { 547 switch (invalidation_reason) { 548 case InvalidationReason::C1_CODEPATCH: 549 return "C1 code patch"; 550 case InvalidationReason::C1_DEOPTIMIZE: 551 return "C1 deoptimized"; 552 case InvalidationReason::C1_DEOPTIMIZE_FOR_PATCHING: 553 return "C1 deoptimize for patching"; 554 case InvalidationReason::C1_PREDICATE_FAILED_TRAP: 555 return "C1 predicate failed trap"; 556 case InvalidationReason::CI_REPLAY: 557 return "CI replay"; 558 case InvalidationReason::JVMCI_INVALIDATE: 559 return "JVMCI invalidate"; 560 case InvalidationReason::JVMCI_MATERIALIZE_VIRTUAL_OBJECT: 561 return "JVMCI materialize virtual object"; 562 case InvalidationReason::JVMCI_REPLACED_WITH_NEW_CODE: 563 return "JVMCI replaced with new code"; 564 case InvalidationReason::JVMCI_REPROFILE: 565 return "JVMCI reprofile"; 566 case InvalidationReason::MARKED_FOR_DEOPTIMIZATION: 567 return "marked for deoptimization"; 568 case InvalidationReason::MISSING_EXCEPTION_HANDLER: 569 return "missing exception handler"; 570 case InvalidationReason::NOT_USED: 571 return "not used"; 572 case InvalidationReason::OSR_INVALIDATION_BACK_BRANCH: 573 return "OSR invalidation back branch"; 574 case InvalidationReason::OSR_INVALIDATION_FOR_COMPILING_WITH_C1: 575 return "OSR invalidation for compiling with C1"; 576 case InvalidationReason::OSR_INVALIDATION_OF_LOWER_LEVEL: 577 return "OSR invalidation of lower level"; 578 case InvalidationReason::SET_NATIVE_FUNCTION: 579 return "set native function"; 580 case InvalidationReason::UNCOMMON_TRAP: 581 return "uncommon trap"; 582 case InvalidationReason::WHITEBOX_DEOPTIMIZATION: 583 return "whitebox deoptimization"; 584 case InvalidationReason::ZOMBIE: 585 return "zombie"; 586 case InvalidationReason::RELOCATED: 587 return "relocated"; 588 default: { 589 assert(false, "Unhandled reason"); 590 return "Unknown"; 591 } 592 } 593 } 594 595 // create nmethod with entry_bci 596 static nmethod* new_nmethod(const methodHandle& method, 597 int compile_id, 598 int entry_bci, 599 CodeOffsets* offsets, 600 int orig_pc_offset, 601 DebugInformationRecorder* recorder, 602 Dependencies* dependencies, 603 CodeBuffer *code_buffer, 604 int frame_size, 605 OopMapSet* oop_maps, 606 ExceptionHandlerTable* handler_table, 607 ImplicitExceptionTable* nul_chk_table, 608 AbstractCompiler* compiler, 609 CompLevel comp_level 610 #if INCLUDE_JVMCI 611 , char* speculations = nullptr, 612 int speculations_len = 0, 613 JVMCINMethodData* jvmci_data = nullptr 614 #endif 615 ); 616 617 // Relocate the nmethod to the code heap identified by code_blob_type. 618 // Returns nullptr if the code heap does not have enough space, the 619 // nmethod is unrelocatable, or the nmethod is invalidated during relocation, 620 // otherwise the relocated nmethod. The original nmethod will be marked not entrant. 621 nmethod* relocate(CodeBlobType code_blob_type); 622 623 static nmethod* new_native_nmethod(const methodHandle& method, 624 int compile_id, 625 CodeBuffer *code_buffer, 626 int vep_offset, 627 int frame_complete, 628 int frame_size, 629 ByteSize receiver_sp_offset, 630 ByteSize basic_lock_sp_offset, 631 OopMapSet* oop_maps, 632 int exception_handler = -1); 633 634 Method* method () const { return _method; } 635 uint16_t entry_bci () const { return _entry_bci; } 636 bool is_native_method() const { return _method != nullptr && _method->is_native(); } 637 bool is_java_method () const { return _method != nullptr && !_method->is_native(); } 638 bool is_osr_method () const { return _entry_bci != InvocationEntryBci; } 639 640 int orig_pc_offset() { return _orig_pc_offset; } 641 bool is_relocatable(); 642 643 // Compiler task identification. Note that all OSR methods 644 // are numbered in an independent sequence if CICountOSR is true, 645 // and native method wrappers are also numbered independently if 646 // CICountNative is true. 647 int compile_id() const { return _compile_id; } 648 int comp_level() const { return _comp_level; } 649 const char* compile_kind() const; 650 651 inline bool is_compiled_by_c1 () const { return _compiler_type == compiler_c1; } 652 inline bool is_compiled_by_c2 () const { return _compiler_type == compiler_c2; } 653 inline bool is_compiled_by_jvmci() const { return _compiler_type == compiler_jvmci; } 654 CompilerType compiler_type () const { return _compiler_type; } 655 const char* compiler_name () const; 656 657 // boundaries for different parts 658 address consts_begin () const { return content_begin(); } 659 address consts_end () const { return code_begin() ; } 660 address insts_begin () const { return code_begin() ; } 661 address insts_end () const { return header_begin() + _stub_offset ; } 662 address stub_begin () const { return header_begin() + _stub_offset ; } 663 address stub_end () const { return code_end() ; } 664 address exception_begin () const { return header_begin() + _exception_offset ; } 665 address deopt_handler_entry () const { return header_begin() + _deopt_handler_entry_offset ; } 666 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (insts_end() - _unwind_handler_offset) : nullptr; } 667 oop* oops_begin () const { return (oop*) data_begin(); } 668 oop* oops_end () const { return (oop*) data_end(); } 669 670 // mutable data 671 Metadata** metadata_begin () const { return (Metadata**) (mutable_data_begin() + _relocation_size); } 672 #if INCLUDE_JVMCI 673 Metadata** metadata_end () const { return (Metadata**) (mutable_data_begin() + _relocation_size + _metadata_size); } 674 address jvmci_data_begin () const { return mutable_data_begin() + _relocation_size + _metadata_size; } 675 address jvmci_data_end () const { return mutable_data_end(); } 676 #else 677 Metadata** metadata_end () const { return (Metadata**) mutable_data_end(); } 678 #endif 679 680 // immutable data 681 void set_immutable_data(address data) { _immutable_data = data; } 682 address immutable_data_begin () const { return _immutable_data; } 683 address immutable_data_end () const { return _immutable_data + _immutable_data_size ; } 684 address dependencies_begin () const { return _immutable_data; } 685 address dependencies_end () const { return _immutable_data + _nul_chk_table_offset; } 686 address nul_chk_table_begin () const { return _immutable_data + _nul_chk_table_offset; } 687 address nul_chk_table_end () const { return _immutable_data + _handler_table_offset; } 688 address handler_table_begin () const { return _immutable_data + _handler_table_offset; } 689 address handler_table_end () const { return _immutable_data + _scopes_pcs_offset ; } 690 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(_immutable_data + _scopes_pcs_offset) ; } 691 PcDesc* scopes_pcs_end () const { return (PcDesc*)(_immutable_data + _scopes_data_offset) ; } 692 address scopes_data_begin () const { return _immutable_data + _scopes_data_offset ; } 693 694 #if INCLUDE_JVMCI 695 address scopes_data_end () const { return _immutable_data + _speculations_offset ; } 696 address speculations_begin () const { return _immutable_data + _speculations_offset ; } 697 address speculations_end () const { return _immutable_data + _immutable_data_ref_count_offset ; } 698 #else 699 address scopes_data_end () const { return _immutable_data + _immutable_data_ref_count_offset ; } 700 #endif 701 address immutable_data_ref_count_begin () const { return _immutable_data + _immutable_data_ref_count_offset ; } 702 703 // Sizes 704 int immutable_data_size() const { return _immutable_data_size; } 705 int consts_size () const { return int( consts_end () - consts_begin ()); } 706 int insts_size () const { return int( insts_end () - insts_begin ()); } 707 int stub_size () const { return int( stub_end () - stub_begin ()); } 708 int oops_size () const { return int((address) oops_end () - (address) oops_begin ()); } 709 int metadata_size () const { return int((address) metadata_end () - (address) metadata_begin ()); } 710 int scopes_data_size () const { return int( scopes_data_end () - scopes_data_begin ()); } 711 int scopes_pcs_size () const { return int((intptr_t)scopes_pcs_end () - (intptr_t)scopes_pcs_begin ()); } 712 int dependencies_size () const { return int( dependencies_end () - dependencies_begin ()); } 713 int handler_table_size () const { return int( handler_table_end() - handler_table_begin()); } 714 int nul_chk_table_size () const { return int( nul_chk_table_end() - nul_chk_table_begin()); } 715 #if INCLUDE_JVMCI 716 int speculations_size () const { return int( speculations_end () - speculations_begin ()); } 717 int jvmci_data_size () const { return int( jvmci_data_end () - jvmci_data_begin ()); } 718 #endif 719 720 int oops_count() const { assert(oops_size() % oopSize == 0, ""); return (oops_size() / oopSize) + 1; } 721 int metadata_count() const { assert(metadata_size() % wordSize == 0, ""); return (metadata_size() / wordSize) + 1; } 722 723 int skipped_instructions_size () const { return _skipped_instructions_size; } 724 int total_size() const; 725 726 // Containment 727 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } 728 // Returns true if a given address is in the 'insts' section. The method 729 // insts_contains_inclusive() is end-inclusive. 730 bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); } 731 bool insts_contains_inclusive(address addr) const { return insts_begin () <= addr && addr <= insts_end (); } 732 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } 733 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } 734 bool metadata_contains (Metadata** addr) const { return metadata_begin () <= addr && addr < metadata_end (); } 735 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } 736 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } 737 bool handler_table_contains (address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } 738 bool nul_chk_table_contains (address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } 739 740 // entry points 741 address entry_point() const { return code_begin() + _entry_offset; } // normal entry point 742 address verified_entry_point() const { return code_begin() + _verified_entry_offset; } // if klass is correct 743 744 int inline_instructions_size() const { return insts_end() - verified_entry_point() - skipped_instructions_size(); } 745 746 enum : signed char { not_installed = -1, // in construction, only the owner doing the construction is 747 // allowed to advance state 748 in_use = 0, // executable nmethod 749 not_entrant = 1 // marked for deoptimization but activations may still exist 750 }; 751 752 // flag accessing and manipulation 753 bool is_not_installed() const { return _state == not_installed; } 754 bool is_in_use() const { return _state <= in_use; } 755 bool is_not_entrant() const { return _state == not_entrant; } 756 int get_state() const { return _state; } 757 758 void clear_unloading_state(); 759 // Heuristically deduce an nmethod isn't worth keeping around 760 bool is_cold(); 761 bool is_unloading(); 762 void do_unloading(bool unloading_occurred); 763 764 void inc_method_profiling_count(); 765 uint64_t method_profiling_count(); 766 767 bool make_in_use() { 768 return try_transition(in_use); 769 } 770 // Make the nmethod non entrant. The nmethod will continue to be 771 // alive. It is used when an uncommon trap happens. Returns true 772 // if this thread changed the state of the nmethod or false if 773 // another thread performed the transition. 774 bool make_not_entrant(InvalidationReason invalidation_reason, bool keep_aot_entry = false); 775 bool make_not_used() { return make_not_entrant(InvalidationReason::NOT_USED, true /* keep AOT entry */); } 776 777 bool is_marked_for_deoptimization() const { return deoptimization_status() != not_marked; } 778 bool has_been_deoptimized() const { return deoptimization_status() == deoptimize_done; } 779 void set_deoptimized_done(); 780 781 bool update_recompile_counts() const { 782 // Update recompile counts when either the update is explicitly requested (deoptimize) 783 // or the nmethod is not marked for deoptimization at all (not_marked). 784 // The latter happens during uncommon traps when deoptimized nmethod is made not entrant. 785 DeoptimizationStatus status = deoptimization_status(); 786 return status != deoptimize_noupdate && status != deoptimize_done; 787 } 788 789 // tells whether frames described by this nmethod can be deoptimized 790 // note: native wrappers cannot be deoptimized. 791 bool can_be_deoptimized() const { return is_java_method(); } 792 793 bool has_dependencies() { return dependencies_size() != 0; } 794 void print_dependencies_on(outputStream* out) PRODUCT_RETURN; 795 void flush_dependencies(); 796 797 template<typename T> 798 T* gc_data() const { return reinterpret_cast<T*>(_gc_data); } 799 template<typename T> 800 void set_gc_data(T* gc_data) { _gc_data = reinterpret_cast<void*>(gc_data); } 801 802 bool has_unsafe_access() const { return _has_unsafe_access; } 803 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } 804 805 bool has_monitors() const { return _has_monitors; } 806 void set_has_monitors(bool z) { _has_monitors = z; } 807 808 bool has_scoped_access() const { return _has_scoped_access; } 809 void set_has_scoped_access(bool z) { _has_scoped_access = z; } 810 811 bool has_wide_vectors() const { return _has_wide_vectors; } 812 void set_has_wide_vectors(bool z) { _has_wide_vectors = z; } 813 814 bool has_clinit_barriers() const { return _has_clinit_barriers; } 815 void set_has_clinit_barriers(bool z) { _has_clinit_barriers = z; } 816 817 bool preloaded() const { return _preloaded; } 818 void set_preloaded(bool z) { _preloaded = z; } 819 820 bool has_flushed_dependencies() const { return _has_flushed_dependencies; } 821 void set_has_flushed_dependencies(bool z) { 822 assert(!has_flushed_dependencies(), "should only happen once"); 823 _has_flushed_dependencies = z; 824 } 825 826 bool is_unlinked() const { return _is_unlinked; } 827 void set_is_unlinked() { 828 assert(!_is_unlinked, "already unlinked"); 829 _is_unlinked = true; 830 } 831 832 bool used() const { return _used; } 833 void set_used() { _used = true; } 834 835 bool is_aot() const { return _aot_code_entry != nullptr; } 836 void set_aot_code_entry(AOTCodeEntry* entry) { _aot_code_entry = entry; } 837 AOTCodeEntry* aot_code_entry() const { return _aot_code_entry; } 838 839 // Support for oops in scopes and relocs: 840 // Note: index 0 is reserved for null. 841 oop oop_at(int index) const; 842 oop oop_at_phantom(int index) const; // phantom reference 843 oop* oop_addr_at(int index) const { // for GC 844 // relocation indexes are biased by 1 (because 0 is reserved) 845 assert(index > 0 && index <= oops_count(), "must be a valid non-zero index"); 846 return &oops_begin()[index - 1]; 847 } 848 849 // Support for meta data in scopes and relocs: 850 // Note: index 0 is reserved for null. 851 Metadata* metadata_at(int index) const { return index == 0 ? nullptr: *metadata_addr_at(index); } 852 Metadata** metadata_addr_at(int index) const { // for GC 853 // relocation indexes are biased by 1 (because 0 is reserved) 854 assert(index > 0 && index <= metadata_count(), "must be a valid non-zero index"); 855 return &metadata_begin()[index - 1]; 856 } 857 858 void copy_values(GrowableArray<Handle>* array); 859 void copy_values(GrowableArray<jobject>* oops); 860 void copy_values(GrowableArray<Metadata*>* metadata); 861 void copy_values(GrowableArray<address>* metadata) {} // Nothing to do 862 863 // Relocation support 864 private: 865 void fix_oop_relocations(address begin, address end, bool initialize_immediates); 866 inline void initialize_immediate_oop(oop* dest, jobject handle); 867 868 protected: 869 address oops_reloc_begin() const; 870 871 public: 872 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } 873 void fix_oop_relocations() { fix_oop_relocations(nullptr, nullptr, false); } 874 875 void create_reloc_immediates_list(JavaThread* thread, GrowableArray<Handle>& oop_list, GrowableArray<Metadata*>& metadata_list); 876 877 bool is_at_poll_return(address pc); 878 bool is_at_poll_or_poll_return(address pc); 879 880 protected: 881 // Exception cache support 882 // Note: _exception_cache may be read and cleaned concurrently. 883 ExceptionCache* exception_cache() const { return _exception_cache; } 884 ExceptionCache* exception_cache_acquire() const; 885 886 public: 887 address handler_for_exception_and_pc(Handle exception, address pc); 888 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); 889 void clean_exception_cache(); 890 891 void add_exception_cache_entry(ExceptionCache* new_entry); 892 ExceptionCache* exception_cache_entry_for_exception(Handle exception); 893 894 895 // Deopt 896 // Return true is the PC is one would expect if the frame is being deopted. 897 inline bool is_deopt_pc(address pc); 898 inline bool is_deopt_entry(address pc); 899 900 // Accessor/mutator for the original pc of a frame before a frame was deopted. 901 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } 902 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } 903 904 const char* state() const; 905 906 bool inlinecache_check_contains(address addr) const { 907 return (addr >= code_begin() && addr < verified_entry_point()); 908 } 909 910 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f); 911 912 // implicit exceptions support 913 address continuation_for_implicit_div0_exception(address pc) { return continuation_for_implicit_exception(pc, true); } 914 address continuation_for_implicit_null_exception(address pc) { return continuation_for_implicit_exception(pc, false); } 915 916 // Inline cache support for class unloading and nmethod unloading 917 private: 918 void cleanup_inline_caches_impl(bool unloading_occurred, bool clean_all); 919 920 address continuation_for_implicit_exception(address pc, bool for_div0_check); 921 922 public: 923 // Serial version used by whitebox test 924 void cleanup_inline_caches_whitebox(); 925 926 void clear_inline_caches(); 927 928 // Execute nmethod barrier code, as if entering through nmethod call. 929 void run_nmethod_entry_barrier(); 930 931 void verify_oop_relocations(); 932 933 bool has_evol_metadata(); 934 935 Method* attached_method(address call_pc); 936 Method* attached_method_before_pc(address pc); 937 938 // GC unloading support 939 // Cleans unloaded klasses and unloaded nmethods in inline caches 940 941 void unload_nmethod_caches(bool class_unloading_occurred); 942 943 void unlink_from_method(); 944 945 // On-stack replacement support 946 int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } 947 address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } 948 nmethod* osr_link() const { return _osr_link; } 949 void set_osr_link(nmethod *n) { _osr_link = n; } 950 void invalidate_osr_method(); 951 952 int num_stack_arg_slots(bool rounded = true) const { 953 return rounded ? align_up(_num_stack_arg_slots, 2) : _num_stack_arg_slots; 954 } 955 956 // Verify calls to dead methods have been cleaned. 957 void verify_clean_inline_caches(); 958 959 // Unlink this nmethod from the system 960 void unlink(); 961 962 // Deallocate this nmethod - called by the GC 963 void purge(bool unregister_nmethod); 964 965 // See comment at definition of _last_seen_on_stack 966 void mark_as_maybe_on_stack(); 967 bool is_maybe_on_stack(); 968 969 // Evolution support. We make old (discarded) compiled methods point to new Method*s. 970 void set_method(Method* method) { _method = method; } 971 972 #if INCLUDE_JVMCI 973 // Gets the JVMCI name of this nmethod. 974 const char* jvmci_name(); 975 976 // Records the pending failed speculation in the 977 // JVMCI speculation log associated with this nmethod. 978 void update_speculation(JavaThread* thread); 979 980 // Gets the data specific to a JVMCI compiled method. 981 // This returns a non-nullptr value iff this nmethod was 982 // compiled by the JVMCI compiler. 983 JVMCINMethodData* jvmci_nmethod_data() const { 984 return jvmci_data_size() == 0 ? nullptr : (JVMCINMethodData*) jvmci_data_begin(); 985 } 986 987 // Returns true if the runtime should NOT collect deoptimization profile for a JVMCI 988 // compiled method 989 bool jvmci_skip_profile_deopt() const; 990 #endif 991 992 void oops_do(OopClosure* f); 993 994 // All-in-one claiming of nmethods: returns true if the caller successfully claimed that 995 // nmethod. 996 bool oops_do_try_claim(); 997 998 // Loom support for following nmethods on the stack 999 void follow_nmethod(OopIterateClosure* cl); 1000 1001 // Class containing callbacks for the oops_do_process_weak/strong() methods 1002 // below. 1003 class OopsDoProcessor { 1004 public: 1005 // Process the oops of the given nmethod based on whether it has been called 1006 // in a weak or strong processing context, i.e. apply either weak or strong 1007 // work on it. 1008 virtual void do_regular_processing(nmethod* nm) = 0; 1009 // Assuming that the oops of the given nmethod has already been its weak 1010 // processing applied, apply the remaining strong processing part. 1011 virtual void do_remaining_strong_processing(nmethod* nm) = 0; 1012 }; 1013 1014 // The following two methods do the work corresponding to weak/strong nmethod 1015 // processing. 1016 void oops_do_process_weak(OopsDoProcessor* p); 1017 void oops_do_process_strong(OopsDoProcessor* p); 1018 1019 static void oops_do_marking_prologue(); 1020 static void oops_do_marking_epilogue(); 1021 1022 private: 1023 ScopeDesc* scope_desc_in(address begin, address end); 1024 1025 address* orig_pc_addr(const frame* fr); 1026 1027 // used by jvmti to track if the load events has been reported 1028 bool load_reported() const { return _load_reported; } 1029 void set_load_reported() { _load_reported = true; } 1030 1031 inline void init_immutable_data_ref_count() { 1032 assert(is_not_installed(), "should be called in nmethod constructor"); 1033 *((int*)immutable_data_ref_count_begin()) = 1; 1034 } 1035 1036 inline int inc_immutable_data_ref_count() { 1037 assert_lock_strong(CodeCache_lock); 1038 int* ref_count = (int*)immutable_data_ref_count_begin(); 1039 assert(*ref_count > 0, "Must be positive"); 1040 return ++(*ref_count); 1041 } 1042 1043 inline int dec_immutable_data_ref_count() { 1044 assert_lock_strong(CodeCache_lock); 1045 int* ref_count = (int*)immutable_data_ref_count_begin(); 1046 assert(*ref_count > 0, "Must be positive"); 1047 return --(*ref_count); 1048 } 1049 1050 static void add_delayed_compiled_method_load_event(nmethod* nm) NOT_CDS_RETURN; 1051 1052 public: 1053 // ScopeDesc retrieval operation 1054 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } 1055 // pc_desc_near returns the first PcDesc at or after the given pc. 1056 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } 1057 1058 // ScopeDesc for an instruction 1059 ScopeDesc* scope_desc_at(address pc); 1060 ScopeDesc* scope_desc_near(address pc); 1061 1062 // copying of debugging information 1063 void copy_scopes_pcs(PcDesc* pcs, int count); 1064 void copy_scopes_data(address buffer, int size); 1065 1066 // Post successful compilation 1067 void post_compiled_method(CompileTask* task); 1068 1069 // jvmti support: 1070 void post_compiled_method_load_event(JvmtiThreadState* state = nullptr); 1071 1072 // verify operations 1073 void verify(); 1074 void verify_scopes(); 1075 void verify_interrupt_point(address interrupt_point, bool is_inline_cache); 1076 1077 // Disassemble this nmethod with additional debug information, e.g. information about blocks. 1078 void decode2(outputStream* st) const; 1079 void print_constant_pool(outputStream* st); 1080 1081 // Avoid hiding of parent's 'decode(outputStream*)' method. 1082 void decode(outputStream* st) const { decode2(st); } // just delegate here. 1083 1084 // AOT cache support 1085 static void post_delayed_compiled_method_load_events() NOT_CDS_RETURN; 1086 1087 // printing support 1088 void print_on_impl(outputStream* st) const; 1089 void print_code(); 1090 void print_value_on_impl(outputStream* st) const; 1091 void print_code_snippet(outputStream* st, address addr) const; 1092 1093 #if defined(SUPPORT_DATA_STRUCTS) 1094 // print output in opt build for disassembler library 1095 void print_relocations_on(outputStream* st) PRODUCT_RETURN; 1096 void print_pcs_on(outputStream* st); 1097 void print_scopes() { print_scopes_on(tty); } 1098 void print_scopes_on(outputStream* st) PRODUCT_RETURN; 1099 void print_handler_table(); 1100 void print_nul_chk_table(); 1101 void print_recorded_oop(int log_n, int index); 1102 void print_recorded_oops(); 1103 void print_recorded_metadata(); 1104 1105 void print_oops(outputStream* st); // oops from the underlying CodeBlob. 1106 void print_metadata(outputStream* st); // metadata in metadata pool. 1107 #else 1108 void print_pcs_on(outputStream* st) { return; } 1109 #endif 1110 1111 void print_calls(outputStream* st) PRODUCT_RETURN; 1112 static void print_statistics() PRODUCT_RETURN; 1113 1114 void maybe_print_nmethod(const DirectiveSet* directive); 1115 void print_nmethod(bool print_code); 1116 1117 void print_on_with_msg(outputStream* st, const char* msg) const; 1118 1119 // Logging 1120 void log_identity(xmlStream* log) const; 1121 void log_new_nmethod() const; 1122 void log_relocated_nmethod(nmethod* original) const; 1123 void log_state_change(InvalidationReason invalidation_reason) const; 1124 1125 // Prints block-level comments, including nmethod specific block labels: 1126 void print_nmethod_labels(outputStream* stream, address block_begin, bool print_section_labels=true) const; 1127 const char* nmethod_section_label(address pos) const; 1128 1129 // returns whether this nmethod has code comments. 1130 bool has_code_comment(address begin, address end); 1131 // Prints a comment for one native instruction (reloc info, pc desc) 1132 void print_code_comment_on(outputStream* st, int column, address begin, address end); 1133 1134 // tells if this compiled method is dependent on the given changes, 1135 // and the changes have invalidated it 1136 bool check_dependency_on(DepChange& changes); 1137 1138 // Fast breakpoint support. Tells if this compiled method is 1139 // dependent on the given method. Returns true if this nmethod 1140 // corresponds to the given method as well. 1141 bool is_dependent_on_method(Method* dependee); 1142 1143 // JVMTI's GetLocalInstance() support 1144 ByteSize native_receiver_sp_offset() { 1145 assert(is_native_method(), "sanity"); 1146 return _native_receiver_sp_offset; 1147 } 1148 ByteSize native_basic_lock_sp_offset() { 1149 assert(is_native_method(), "sanity"); 1150 return _native_basic_lock_sp_offset; 1151 } 1152 1153 // support for code generation 1154 static ByteSize osr_entry_point_offset() { return byte_offset_of(nmethod, _osr_entry_point); } 1155 static ByteSize state_offset() { return byte_offset_of(nmethod, _state); } 1156 1157 void metadata_do(MetadataClosure* f); 1158 1159 address call_instruction_address(address pc) const; 1160 1161 void make_deoptimized(); 1162 void finalize_relocations(); 1163 1164 void prepare_for_archiving_impl(); 1165 1166 class Vptr : public CodeBlob::Vptr { 1167 void print_on(const CodeBlob* instance, outputStream* st) const override { 1168 ttyLocker ttyl; 1169 instance->as_nmethod()->print_on_impl(st); 1170 } 1171 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 1172 instance->as_nmethod()->print_value_on_impl(st); 1173 } 1174 void prepare_for_archiving(CodeBlob* instance) const override { 1175 ((nmethod*)instance)->prepare_for_archiving_impl(); 1176 }; 1177 }; 1178 1179 static const Vptr _vpntr; 1180 }; 1181 1182 struct NMethodMarkingScope : StackObj { 1183 NMethodMarkingScope() { 1184 nmethod::oops_do_marking_prologue(); 1185 } 1186 ~NMethodMarkingScope() { 1187 nmethod::oops_do_marking_epilogue(); 1188 } 1189 }; 1190 1191 #endif // SHARE_CODE_NMETHOD_HPP --- EOF ---