1 /* 2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_CODE_NMETHOD_HPP 26 #define SHARE_CODE_NMETHOD_HPP 27 28 #include "code/compiledMethod.hpp" 29 30 class CompileTask; 31 class DepChange; 32 class DirectiveSet; 33 class DebugInformationRecorder; 34 class JvmtiThreadState; 35 class OopIterateClosure; 36 37 // nmethods (native methods) are the compiled code versions of Java methods. 38 // 39 // An nmethod contains: 40 // - header (the nmethod structure) 41 // [Relocation] 42 // - relocation information 43 // - constant part (doubles, longs and floats used in nmethod) 44 // - oop table 45 // [Code] 46 // - code body 47 // - exception handler 48 // - stub code 49 // [Debugging information] 50 // - oop array 51 // - data array 52 // - pcs 53 // [Exception handler table] 54 // - handler entry point array 55 // [Implicit Null Pointer exception table] 56 // - implicit null table array 57 // [Speculations] 58 // - encoded speculations array 59 // [JVMCINMethodData] 60 // - meta data for JVMCI compiled nmethod 61 62 #if INCLUDE_JVMCI 63 class FailedSpeculation; 64 class JVMCINMethodData; 65 #endif 66 67 class nmethod : public CompiledMethod { 68 friend class VMStructs; 69 friend class JVMCIVMStructs; 70 friend class CodeCache; // scavengable oops 71 friend class JVMCINMethodData; 72 73 private: 74 75 uint64_t _gc_epoch; 76 77 // To support simple linked-list chaining of nmethods: 78 nmethod* _osr_link; // from InstanceKlass::osr_nmethods_head 79 80 // STW two-phase nmethod root processing helpers. 81 // 82 // When determining liveness of a given nmethod to do code cache unloading, 83 // some collectors need to do different things depending on whether the nmethods 84 // need to absolutely be kept alive during root processing; "strong"ly reachable 85 // nmethods are known to be kept alive at root processing, but the liveness of 86 // "weak"ly reachable ones is to be determined later. 87 // 88 // We want to allow strong and weak processing of nmethods by different threads 89 // at the same time without heavy synchronization. Additional constraints are 90 // to make sure that every nmethod is processed a minimal amount of time, and 91 // nmethods themselves are always iterated at most once at a particular time. 92 // 93 // Note that strong processing work must be a superset of weak processing work 94 // for this code to work. 95 // 96 // We store state and claim information in the _oops_do_mark_link member, using 97 // the two LSBs for the state and the remaining upper bits for linking together 98 // nmethods that were already visited. 99 // The last element is self-looped, i.e. points to itself to avoid some special 100 // "end-of-list" sentinel value. 101 // 102 // _oops_do_mark_link special values: 103 // 104 // _oops_do_mark_link == nullptr: the nmethod has not been visited at all yet, i.e. 105 // is Unclaimed. 106 // 107 // For other values, its lowest two bits indicate the following states of the nmethod: 108 // 109 // weak_request (WR): the nmethod has been claimed by a thread for weak processing 110 // weak_done (WD): weak processing has been completed for this nmethod. 111 // strong_request (SR): the nmethod has been found to need strong processing while 112 // being weak processed. 113 // strong_done (SD): strong processing has been completed for this nmethod . 114 // 115 // The following shows the _only_ possible progressions of the _oops_do_mark_link 116 // pointer. 117 // 118 // Given 119 // N as the nmethod 120 // X the current next value of _oops_do_mark_link 121 // 122 // Unclaimed (C)-> N|WR (C)-> X|WD: the nmethod has been processed weakly by 123 // a single thread. 124 // Unclaimed (C)-> N|WR (C)-> X|WD (O)-> X|SD: after weak processing has been 125 // completed (as above) another thread found that the nmethod needs strong 126 // processing after all. 127 // Unclaimed (C)-> N|WR (O)-> N|SR (C)-> X|SD: during weak processing another 128 // thread finds that the nmethod needs strong processing, marks it as such and 129 // terminates. The original thread completes strong processing. 130 // Unclaimed (C)-> N|SD (C)-> X|SD: the nmethod has been processed strongly from 131 // the beginning by a single thread. 132 // 133 // "|" describes the concatenation of bits in _oops_do_mark_link. 134 // 135 // The diagram also describes the threads responsible for changing the nmethod to 136 // the next state by marking the _transition_ with (C) and (O), which mean "current" 137 // and "other" thread respectively. 138 // 139 struct oops_do_mark_link; // Opaque data type. 140 141 // States used for claiming nmethods during root processing. 142 static const uint claim_weak_request_tag = 0; 143 static const uint claim_weak_done_tag = 1; 144 static const uint claim_strong_request_tag = 2; 145 static const uint claim_strong_done_tag = 3; 146 147 static oops_do_mark_link* mark_link(nmethod* nm, uint tag) { 148 assert(tag <= claim_strong_done_tag, "invalid tag %u", tag); 149 assert(is_aligned(nm, 4), "nmethod pointer must have zero lower two LSB"); 150 return (oops_do_mark_link*)(((uintptr_t)nm & ~0x3) | tag); 151 } 152 153 static uint extract_state(oops_do_mark_link* link) { 154 return (uint)((uintptr_t)link & 0x3); 155 } 156 157 static nmethod* extract_nmethod(oops_do_mark_link* link) { 158 return (nmethod*)((uintptr_t)link & ~0x3); 159 } 160 161 void oops_do_log_change(const char* state); 162 163 static bool oops_do_has_weak_request(oops_do_mark_link* next) { 164 return extract_state(next) == claim_weak_request_tag; 165 } 166 167 static bool oops_do_has_any_strong_state(oops_do_mark_link* next) { 168 return extract_state(next) >= claim_strong_request_tag; 169 } 170 171 // Attempt Unclaimed -> N|WR transition. Returns true if successful. 172 bool oops_do_try_claim_weak_request(); 173 174 // Attempt Unclaimed -> N|SD transition. Returns the current link. 175 oops_do_mark_link* oops_do_try_claim_strong_done(); 176 // Attempt N|WR -> X|WD transition. Returns nullptr if successful, X otherwise. 177 nmethod* oops_do_try_add_to_list_as_weak_done(); 178 179 // Attempt X|WD -> N|SR transition. Returns the current link. 180 oops_do_mark_link* oops_do_try_add_strong_request(oops_do_mark_link* next); 181 // Attempt X|WD -> X|SD transition. Returns true if successful. 182 bool oops_do_try_claim_weak_done_as_strong_done(oops_do_mark_link* next); 183 184 // Do the N|SD -> X|SD transition. 185 void oops_do_add_to_list_as_strong_done(); 186 187 // Sets this nmethod as strongly claimed (as part of N|SD -> X|SD and N|SR -> X|SD 188 // transitions). 189 void oops_do_set_strong_done(nmethod* old_head); 190 191 static nmethod* volatile _oops_do_mark_nmethods; 192 oops_do_mark_link* volatile _oops_do_mark_link; 193 194 // offsets for entry points 195 address _entry_point; // entry point with class check 196 address _verified_entry_point; // entry point without class check 197 address _osr_entry_point; // entry point for on stack replacement 198 199 bool _is_unlinked; 200 201 // Shared fields for all nmethod's 202 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method 203 204 // Offsets for different nmethod parts 205 int _exception_offset; 206 // Offset of the unwind handler if it exists 207 int _unwind_handler_offset; 208 209 int _consts_offset; 210 int _stub_offset; 211 int _oops_offset; // offset to where embedded oop table begins (inside data) 212 int _metadata_offset; // embedded meta data table 213 int _scopes_data_offset; 214 int _scopes_pcs_offset; 215 int _dependencies_offset; 216 int _handler_table_offset; 217 int _nul_chk_table_offset; 218 #if INCLUDE_JVMCI 219 int _speculations_offset; 220 int _jvmci_data_offset; 221 #endif 222 int _nmethod_end_offset; 223 224 int code_offset() const { return int(code_begin() - header_begin()); } 225 226 // location in frame (offset for sp) that deopt can store the original 227 // pc during a deopt. 228 int _orig_pc_offset; 229 230 int _compile_id; // which compilation made this nmethod 231 232 #if INCLUDE_RTM_OPT 233 // RTM state at compile time. Used during deoptimization to decide 234 // whether to restart collecting RTM locking abort statistic again. 235 RTMState _rtm_state; 236 #endif 237 238 // These are used for compiled synchronized native methods to 239 // locate the owner and stack slot for the BasicLock. They are 240 // needed because there is no debug information for compiled native 241 // wrappers and the oop maps are insufficient to allow 242 // frame::retrieve_receiver() to work. Currently they are expected 243 // to be byte offsets from the Java stack pointer for maximum code 244 // sharing between platforms. JVMTI's GetLocalInstance() uses these 245 // offsets to find the receiver for non-static native wrapper frames. 246 ByteSize _native_receiver_sp_offset; 247 ByteSize _native_basic_lock_sp_offset; 248 249 CompLevel _comp_level; // compilation level 250 251 // Local state used to keep track of whether unloading is happening or not 252 volatile uint8_t _is_unloading_state; 253 254 // protected by CodeCache_lock 255 bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) 256 257 // used by jvmti to track if an event has been posted for this nmethod. 258 bool _load_reported; 259 260 // Protected by CompiledMethod_lock 261 volatile signed char _state; // {not_installed, in_use, not_used, not_entrant} 262 263 int _skipped_instructions_size; 264 265 // For native wrappers 266 nmethod(Method* method, 267 CompilerType type, 268 int nmethod_size, 269 int compile_id, 270 CodeOffsets* offsets, 271 CodeBuffer *code_buffer, 272 int frame_size, 273 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ 274 ByteSize basic_lock_sp_offset, /* synchronized natives only */ 275 OopMapSet* oop_maps); 276 277 // Creation support 278 nmethod(Method* method, 279 CompilerType type, 280 int nmethod_size, 281 int compile_id, 282 int entry_bci, 283 CodeOffsets* offsets, 284 int orig_pc_offset, 285 DebugInformationRecorder *recorder, 286 Dependencies* dependencies, 287 CodeBuffer *code_buffer, 288 int frame_size, 289 OopMapSet* oop_maps, 290 ExceptionHandlerTable* handler_table, 291 ImplicitExceptionTable* nul_chk_table, 292 AbstractCompiler* compiler, 293 CompLevel comp_level 294 #if INCLUDE_JVMCI 295 , char* speculations = nullptr, 296 int speculations_len = 0, 297 JVMCINMethodData* jvmci_data = nullptr 298 #endif 299 ); 300 301 // helper methods 302 void* operator new(size_t size, int nmethod_size, int comp_level) throw(); 303 // For method handle intrinsics: Try MethodNonProfiled, MethodProfiled and NonNMethod. 304 // Attention: Only allow NonNMethod space for special nmethods which don't need to be 305 // findable by nmethod iterators! In particular, they must not contain oops! 306 void* operator new(size_t size, int nmethod_size, bool allow_NonNMethod_space) throw(); 307 308 const char* reloc_string_for(u_char* begin, u_char* end); 309 310 bool try_transition(signed char new_state); 311 312 // Returns true if this thread changed the state of the nmethod or 313 // false if another thread performed the transition. 314 bool make_entrant() { Unimplemented(); return false; } 315 void inc_decompile_count(); 316 317 // Inform external interfaces that a compiled method has been unloaded 318 void post_compiled_method_unload(); 319 320 // Initialize fields to their default values 321 void init_defaults(); 322 323 // Offsets 324 int content_offset() const { return int(content_begin() - header_begin()); } 325 int data_offset() const { return _data_offset; } 326 327 address header_end() const { return (address) header_begin() + header_size(); } 328 329 public: 330 // create nmethod with entry_bci 331 static nmethod* new_nmethod(const methodHandle& method, 332 int compile_id, 333 int entry_bci, 334 CodeOffsets* offsets, 335 int orig_pc_offset, 336 DebugInformationRecorder* recorder, 337 Dependencies* dependencies, 338 CodeBuffer *code_buffer, 339 int frame_size, 340 OopMapSet* oop_maps, 341 ExceptionHandlerTable* handler_table, 342 ImplicitExceptionTable* nul_chk_table, 343 AbstractCompiler* compiler, 344 CompLevel comp_level 345 #if INCLUDE_JVMCI 346 , char* speculations = nullptr, 347 int speculations_len = 0, 348 JVMCINMethodData* jvmci_data = nullptr 349 #endif 350 ); 351 352 // Only used for unit tests. 353 nmethod() 354 : CompiledMethod(), 355 _native_receiver_sp_offset(in_ByteSize(-1)), 356 _native_basic_lock_sp_offset(in_ByteSize(-1)), 357 _is_unloading_state(0) {} 358 359 360 static nmethod* new_native_nmethod(const methodHandle& method, 361 int compile_id, 362 CodeBuffer *code_buffer, 363 int vep_offset, 364 int frame_complete, 365 int frame_size, 366 ByteSize receiver_sp_offset, 367 ByteSize basic_lock_sp_offset, 368 OopMapSet* oop_maps, 369 int exception_handler = -1); 370 371 // type info 372 bool is_nmethod() const { return true; } 373 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } 374 375 // boundaries for different parts 376 address consts_begin () const { return header_begin() + _consts_offset ; } 377 address consts_end () const { return code_begin() ; } 378 address stub_begin () const { return header_begin() + _stub_offset ; } 379 address stub_end () const { return header_begin() + _oops_offset ; } 380 address exception_begin () const { return header_begin() + _exception_offset ; } 381 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : nullptr; } 382 oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } 383 oop* oops_end () const { return (oop*) (header_begin() + _metadata_offset) ; } 384 385 Metadata** metadata_begin () const { return (Metadata**) (header_begin() + _metadata_offset) ; } 386 Metadata** metadata_end () const { return (Metadata**) _scopes_data_begin; } 387 388 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } 389 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } 390 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } 391 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } 392 address dependencies_end () const { return header_begin() + _handler_table_offset ; } 393 address handler_table_begin () const { return header_begin() + _handler_table_offset ; } 394 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } 395 address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } 396 397 int skipped_instructions_size () const { return _skipped_instructions_size ; } 398 399 #if INCLUDE_JVMCI 400 address nul_chk_table_end () const { return header_begin() + _speculations_offset ; } 401 address speculations_begin () const { return header_begin() + _speculations_offset ; } 402 address speculations_end () const { return header_begin() + _jvmci_data_offset ; } 403 address jvmci_data_begin () const { return header_begin() + _jvmci_data_offset ; } 404 address jvmci_data_end () const { return header_begin() + _nmethod_end_offset ; } 405 #else 406 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } 407 #endif 408 409 // Sizes 410 int oops_size () const { return int((address) oops_end () - (address) oops_begin ()); } 411 int metadata_size () const { return int((address) metadata_end () - (address) metadata_begin ()); } 412 int dependencies_size () const { return int( dependencies_end () - dependencies_begin ()); } 413 #if INCLUDE_JVMCI 414 int speculations_size () const { return int( speculations_end () - speculations_begin ()); } 415 int jvmci_data_size () const { return int( jvmci_data_end () - jvmci_data_begin ()); } 416 #endif 417 418 int oops_count() const { assert(oops_size() % oopSize == 0, ""); return (oops_size() / oopSize) + 1; } 419 int metadata_count() const { assert(metadata_size() % wordSize == 0, ""); return (metadata_size() / wordSize) + 1; } 420 421 int total_size () const; 422 423 // Containment 424 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } 425 bool metadata_contains (Metadata** addr) const { return metadata_begin () <= addr && addr < metadata_end (); } 426 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } 427 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } 428 429 // entry points 430 address entry_point() const { return _entry_point; } // normal entry point 431 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct 432 433 // flag accessing and manipulation 434 bool is_not_installed() const { return _state == not_installed; } 435 bool is_in_use() const { return _state <= in_use; } 436 bool is_not_entrant() const { return _state == not_entrant; } 437 438 void clear_unloading_state(); 439 // Heuristically deduce an nmethod isn't worth keeping around 440 bool is_cold(); 441 virtual bool is_unloading(); 442 virtual void do_unloading(bool unloading_occurred); 443 444 bool is_unlinked() const { return _is_unlinked; } 445 void set_is_unlinked() { assert(!_is_unlinked, "already unlinked"); _is_unlinked = true; } 446 447 #if INCLUDE_RTM_OPT 448 // rtm state accessing and manipulating 449 RTMState rtm_state() const { return _rtm_state; } 450 void set_rtm_state(RTMState state) { _rtm_state = state; } 451 #endif 452 453 bool make_in_use() { 454 return try_transition(in_use); 455 } 456 // Make the nmethod non entrant. The nmethod will continue to be 457 // alive. It is used when an uncommon trap happens. Returns true 458 // if this thread changed the state of the nmethod or false if 459 // another thread performed the transition. 460 bool make_not_entrant(); 461 bool make_not_used() { return make_not_entrant(); } 462 463 int get_state() const { 464 return _state; 465 } 466 467 bool has_dependencies() { return dependencies_size() != 0; } 468 void print_dependencies_on(outputStream* out) PRODUCT_RETURN; 469 void flush_dependencies(); 470 bool has_flushed_dependencies() { return _has_flushed_dependencies; } 471 void set_has_flushed_dependencies() { 472 assert(!has_flushed_dependencies(), "should only happen once"); 473 _has_flushed_dependencies = 1; 474 } 475 476 int comp_level() const { return _comp_level; } 477 478 void unlink_from_method(); 479 480 // Support for oops in scopes and relocs: 481 // Note: index 0 is reserved for null. 482 oop oop_at(int index) const; 483 oop oop_at_phantom(int index) const; // phantom reference 484 oop* oop_addr_at(int index) const { // for GC 485 // relocation indexes are biased by 1 (because 0 is reserved) 486 assert(index > 0 && index <= oops_count(), "must be a valid non-zero index"); 487 return &oops_begin()[index - 1]; 488 } 489 490 // Support for meta data in scopes and relocs: 491 // Note: index 0 is reserved for null. 492 Metadata* metadata_at(int index) const { return index == 0 ? nullptr: *metadata_addr_at(index); } 493 Metadata** metadata_addr_at(int index) const { // for GC 494 // relocation indexes are biased by 1 (because 0 is reserved) 495 assert(index > 0 && index <= metadata_count(), "must be a valid non-zero index"); 496 return &metadata_begin()[index - 1]; 497 } 498 499 void copy_values(GrowableArray<jobject>* oops); 500 void copy_values(GrowableArray<Metadata*>* metadata); 501 502 // Relocation support 503 private: 504 void fix_oop_relocations(address begin, address end, bool initialize_immediates); 505 inline void initialize_immediate_oop(oop* dest, jobject handle); 506 507 public: 508 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } 509 void fix_oop_relocations() { fix_oop_relocations(nullptr, nullptr, false); } 510 511 // On-stack replacement support 512 int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } 513 address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } 514 void invalidate_osr_method(); 515 nmethod* osr_link() const { return _osr_link; } 516 void set_osr_link(nmethod *n) { _osr_link = n; } 517 518 // Verify calls to dead methods have been cleaned. 519 void verify_clean_inline_caches(); 520 521 // Unlink this nmethod from the system 522 void unlink(); 523 524 // Deallocate this nmethod - called by the GC 525 void purge(bool free_code_cache_data = true); 526 527 // See comment at definition of _last_seen_on_stack 528 void mark_as_maybe_on_stack(); 529 bool is_maybe_on_stack(); 530 531 // Evolution support. We make old (discarded) compiled methods point to new Method*s. 532 void set_method(Method* method) { _method = method; } 533 534 #if INCLUDE_JVMCI 535 // Gets the JVMCI name of this nmethod. 536 const char* jvmci_name(); 537 538 // Records the pending failed speculation in the 539 // JVMCI speculation log associated with this nmethod. 540 void update_speculation(JavaThread* thread); 541 542 // Gets the data specific to a JVMCI compiled method. 543 // This returns a non-nullptr value iff this nmethod was 544 // compiled by the JVMCI compiler. 545 JVMCINMethodData* jvmci_nmethod_data() const { 546 return jvmci_data_size() == 0 ? nullptr : (JVMCINMethodData*) jvmci_data_begin(); 547 } 548 #endif 549 550 public: 551 void oops_do(OopClosure* f) { oops_do(f, false); } 552 void oops_do(OopClosure* f, bool allow_dead); 553 554 // All-in-one claiming of nmethods: returns true if the caller successfully claimed that 555 // nmethod. 556 bool oops_do_try_claim(); 557 558 // Loom support for following nmethods on the stack 559 void follow_nmethod(OopIterateClosure* cl); 560 561 // Class containing callbacks for the oops_do_process_weak/strong() methods 562 // below. 563 class OopsDoProcessor { 564 public: 565 // Process the oops of the given nmethod based on whether it has been called 566 // in a weak or strong processing context, i.e. apply either weak or strong 567 // work on it. 568 virtual void do_regular_processing(nmethod* nm) = 0; 569 // Assuming that the oops of the given nmethod has already been its weak 570 // processing applied, apply the remaining strong processing part. 571 virtual void do_remaining_strong_processing(nmethod* nm) = 0; 572 }; 573 574 // The following two methods do the work corresponding to weak/strong nmethod 575 // processing. 576 void oops_do_process_weak(OopsDoProcessor* p); 577 void oops_do_process_strong(OopsDoProcessor* p); 578 579 static void oops_do_marking_prologue(); 580 static void oops_do_marking_epilogue(); 581 582 private: 583 ScopeDesc* scope_desc_in(address begin, address end); 584 585 address* orig_pc_addr(const frame* fr); 586 587 // used by jvmti to track if the load events has been reported 588 bool load_reported() const { return _load_reported; } 589 void set_load_reported() { _load_reported = true; } 590 591 public: 592 // copying of debugging information 593 void copy_scopes_pcs(PcDesc* pcs, int count); 594 void copy_scopes_data(address buffer, int size); 595 596 int orig_pc_offset() { return _orig_pc_offset; } 597 598 // Post successful compilation 599 void post_compiled_method(CompileTask* task); 600 601 // jvmti support: 602 void post_compiled_method_load_event(JvmtiThreadState* state = nullptr); 603 604 // verify operations 605 void verify(); 606 void verify_scopes(); 607 void verify_interrupt_point(address interrupt_point); 608 609 // Disassemble this nmethod with additional debug information, e.g. information about blocks. 610 void decode2(outputStream* st) const; 611 void print_constant_pool(outputStream* st); 612 613 // Avoid hiding of parent's 'decode(outputStream*)' method. 614 void decode(outputStream* st) const { decode2(st); } // just delegate here. 615 616 // printing support 617 void print() const; 618 void print(outputStream* st) const; 619 void print_code(); 620 621 #if defined(SUPPORT_DATA_STRUCTS) 622 // print output in opt build for disassembler library 623 void print_relocations() PRODUCT_RETURN; 624 void print_pcs() { print_pcs_on(tty); } 625 void print_pcs_on(outputStream* st); 626 void print_scopes() { print_scopes_on(tty); } 627 void print_scopes_on(outputStream* st) PRODUCT_RETURN; 628 void print_value_on(outputStream* st) const; 629 void print_handler_table(); 630 void print_nul_chk_table(); 631 void print_recorded_oop(int log_n, int index); 632 void print_recorded_oops(); 633 void print_recorded_metadata(); 634 635 void print_oops(outputStream* st); // oops from the underlying CodeBlob. 636 void print_metadata(outputStream* st); // metadata in metadata pool. 637 #else 638 // void print_pcs() PRODUCT_RETURN; 639 void print_pcs() { return; } 640 #endif 641 642 void print_calls(outputStream* st) PRODUCT_RETURN; 643 static void print_statistics() PRODUCT_RETURN; 644 645 void maybe_print_nmethod(const DirectiveSet* directive); 646 void print_nmethod(bool print_code); 647 648 // need to re-define this from CodeBlob else the overload hides it 649 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } 650 void print_on(outputStream* st, const char* msg) const; 651 652 // Logging 653 void log_identity(xmlStream* log) const; 654 void log_new_nmethod() const; 655 void log_state_change() const; 656 657 // Prints block-level comments, including nmethod specific block labels: 658 virtual void print_block_comment(outputStream* stream, address block_begin) const { 659 #if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY) 660 print_nmethod_labels(stream, block_begin); 661 CodeBlob::print_block_comment(stream, block_begin); 662 #endif 663 } 664 665 void print_nmethod_labels(outputStream* stream, address block_begin, bool print_section_labels=true) const; 666 const char* nmethod_section_label(address pos) const; 667 668 // returns whether this nmethod has code comments. 669 bool has_code_comment(address begin, address end); 670 // Prints a comment for one native instruction (reloc info, pc desc) 671 void print_code_comment_on(outputStream* st, int column, address begin, address end); 672 673 // Compiler task identification. Note that all OSR methods 674 // are numbered in an independent sequence if CICountOSR is true, 675 // and native method wrappers are also numbered independently if 676 // CICountNative is true. 677 virtual int compile_id() const { return _compile_id; } 678 const char* compile_kind() const; 679 680 // tells if this compiled method is dependent on the given changes, 681 // and the changes have invalidated it 682 bool check_dependency_on(DepChange& changes); 683 684 // Fast breakpoint support. Tells if this compiled method is 685 // dependent on the given method. Returns true if this nmethod 686 // corresponds to the given method as well. 687 virtual bool is_dependent_on_method(Method* dependee); 688 689 // JVMTI's GetLocalInstance() support 690 ByteSize native_receiver_sp_offset() { 691 return _native_receiver_sp_offset; 692 } 693 ByteSize native_basic_lock_sp_offset() { 694 return _native_basic_lock_sp_offset; 695 } 696 697 // support for code generation 698 static ByteSize verified_entry_point_offset() { return byte_offset_of(nmethod, _verified_entry_point); } 699 static ByteSize osr_entry_point_offset() { return byte_offset_of(nmethod, _osr_entry_point); } 700 static ByteSize state_offset() { return byte_offset_of(nmethod, _state); } 701 702 virtual void metadata_do(MetadataClosure* f); 703 704 NativeCallWrapper* call_wrapper_at(address call) const; 705 NativeCallWrapper* call_wrapper_before(address return_pc) const; 706 address call_instruction_address(address pc) const; 707 708 virtual CompiledStaticCall* compiledStaticCall_at(Relocation* call_site) const; 709 virtual CompiledStaticCall* compiledStaticCall_at(address addr) const; 710 virtual CompiledStaticCall* compiledStaticCall_before(address addr) const; 711 712 virtual void make_deoptimized(); 713 void finalize_relocations(); 714 }; 715 716 #endif // SHARE_CODE_NMETHOD_HPP