1 /* 2 * Copyright (c) 1998, 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_CODEBLOB_HPP 26 #define SHARE_CODE_CODEBLOB_HPP 27 28 #include "asm/codeBuffer.hpp" 29 #include "compiler/compilerDefinitions.hpp" 30 #include "compiler/oopMap.hpp" 31 #include "runtime/javaFrameAnchor.hpp" 32 #include "runtime/frame.hpp" 33 #include "runtime/handles.hpp" 34 #include "utilities/align.hpp" 35 #include "utilities/macros.hpp" 36 37 class ImmutableOopMap; 38 class ImmutableOopMapSet; 39 class JNIHandleBlock; 40 class OopMapSet; 41 42 // CodeBlob Types 43 // Used in the CodeCache to assign CodeBlobs to different CodeHeaps 44 enum class CodeBlobType { 45 MethodNonProfiled = 0, // Execution level 1 and 4 (non-profiled) nmethods (including native nmethods) 46 MethodProfiled = 1, // Execution level 2 and 3 (profiled) nmethods 47 NonNMethod = 2, // Non-nmethods like Buffers, Adapters and Runtime Stubs 48 All = 3, // All types (No code cache segmentation) 49 NumTypes = 4 // Number of CodeBlobTypes 50 }; 51 52 // CodeBlob - superclass for all entries in the CodeCache. 53 // 54 // Subtypes are: 55 // nmethod : JIT Compiled Java methods 56 // RuntimeBlob : Non-compiled method code; generated glue code 57 // BufferBlob : Used for non-relocatable code such as interpreter, stubroutines, etc. 58 // AdapterBlob : Used to hold C2I/I2C adapters 59 // VtableBlob : Used for holding vtable chunks 60 // MethodHandlesAdapterBlob : Used to hold MethodHandles adapters 61 // RuntimeStub : Call to VM runtime methods 62 // SingletonBlob : Super-class for all blobs that exist in only one instance 63 // DeoptimizationBlob : Used for deoptimization 64 // SafepointBlob : Used to handle illegal instruction exceptions 65 // ExceptionBlob : Used for stack unrolling 66 // UncommonTrapBlob : Used to handle uncommon traps 67 // UpcallStub : Used for upcalls from native code 68 // 69 // 70 // Layout : continuous in the CodeCache 71 // - header 72 // - relocation 73 // - content space 74 // - instruction space 75 // - data space 76 77 enum class CodeBlobKind : u1 { 78 None, 79 Nmethod, 80 Buffer, 81 Adapter, 82 Vtable, 83 MHAdapter, 84 RuntimeStub, 85 Deoptimization, 86 Safepoint, 87 #ifdef COMPILER2 88 Exception, 89 UncommonTrap, 90 #endif 91 Upcall, 92 Number_Of_Kinds 93 }; 94 95 class UpcallStub; // for as_upcall_stub() 96 class RuntimeStub; // for as_runtime_stub() 97 class JavaFrameAnchor; // for UpcallStub::jfa_for_frame 98 99 class CodeBlob { 100 friend class VMStructs; 101 friend class JVMCIVMStructs; 102 103 protected: 104 // order fields from large to small to minimize padding between fields 105 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob 106 const char* _name; 107 108 int _size; // total size of CodeBlob in bytes 109 int _relocation_size; // size of relocation (could be bigger than 64Kb) 110 int _content_offset; // offset to where content region begins (this includes consts, insts, stubs) 111 int _code_offset; // offset to where instructions region begins (this includes insts, stubs) 112 113 int _data_offset; // offset to where data region begins 114 int _frame_size; // size of stack frame in words (NOT slots. On x64 these are 64bit words) 115 116 S390_ONLY(int _ctable_offset;) 117 118 uint16_t _header_size; // size of header (depends on subclass) 119 int16_t _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have 120 // not finished setting up their frame. Beware of pc's in 121 // that range. There is a similar range(s) on returns 122 // which we don't detect. 123 124 CodeBlobKind _kind; // Kind of this code blob 125 126 bool _caller_must_gc_arguments; 127 128 #ifndef PRODUCT 129 AsmRemarks _asm_remarks; 130 DbgStrings _dbg_strings; 131 #endif 132 133 void print_on_impl(outputStream* st) const; 134 void print_value_on_impl(outputStream* st) const; 135 136 class Vptr { 137 public: 138 virtual void print_on(const CodeBlob* instance, outputStream* st) const = 0; 139 virtual void print_value_on(const CodeBlob* instance, outputStream* st) const = 0; 140 }; 141 142 const Vptr* vptr() const; 143 144 CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size, 145 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments); 146 147 // Simple CodeBlob used for simple BufferBlob. 148 CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size); 149 150 void operator delete(void* p) { } 151 152 public: 153 154 ~CodeBlob() { 155 assert(_oop_maps == nullptr, "Not flushed"); 156 } 157 158 // Returns the space needed for CodeBlob 159 static unsigned int allocation_size(CodeBuffer* cb, int header_size); 160 static unsigned int align_code_offset(int offset); 161 162 // Deletion 163 void purge(); 164 165 // Typing 166 bool is_nmethod() const { return _kind == CodeBlobKind::Nmethod; } 167 bool is_buffer_blob() const { return _kind == CodeBlobKind::Buffer; } 168 bool is_runtime_stub() const { return _kind == CodeBlobKind::RuntimeStub; } 169 bool is_deoptimization_stub() const { return _kind == CodeBlobKind::Deoptimization; } 170 #ifdef COMPILER2 171 bool is_uncommon_trap_stub() const { return _kind == CodeBlobKind::UncommonTrap; } 172 bool is_exception_stub() const { return _kind == CodeBlobKind::Exception; } 173 #else 174 bool is_uncommon_trap_stub() const { return false; } 175 bool is_exception_stub() const { return false; } 176 #endif 177 bool is_safepoint_stub() const { return _kind == CodeBlobKind::Safepoint; } 178 bool is_adapter_blob() const { return _kind == CodeBlobKind::Adapter; } 179 bool is_vtable_blob() const { return _kind == CodeBlobKind::Vtable; } 180 bool is_method_handles_adapter_blob() const { return _kind == CodeBlobKind::MHAdapter; } 181 bool is_upcall_stub() const { return _kind == CodeBlobKind::Upcall; } 182 183 // Casting 184 nmethod* as_nmethod_or_null() const { return is_nmethod() ? (nmethod*) this : nullptr; } 185 nmethod* as_nmethod() const { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; } 186 CodeBlob* as_codeblob() const { return (CodeBlob*) this; } 187 UpcallStub* as_upcall_stub() const { assert(is_upcall_stub(), "must be upcall stub"); return (UpcallStub*) this; } 188 RuntimeStub* as_runtime_stub() const { assert(is_runtime_stub(), "must be runtime blob"); return (RuntimeStub*) this; } 189 190 // Boundaries 191 address header_begin() const { return (address) this; } 192 address header_end() const { return ((address) this) + _header_size; } 193 relocInfo* relocation_begin() const { return (relocInfo*) header_end(); } 194 relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } 195 address content_begin() const { return (address) header_begin() + _content_offset; } 196 address content_end() const { return (address) header_begin() + _data_offset; } 197 address code_begin() const { return (address) header_begin() + _code_offset; } 198 // code_end == content_end is true for all types of blobs for now, it is also checked in the constructor 199 address code_end() const { return (address) header_begin() + _data_offset; } 200 address data_begin() const { return (address) header_begin() + _data_offset; } 201 address data_end() const { return (address) header_begin() + _size; } 202 203 // Offsets 204 int content_offset() const { return _content_offset; } 205 int code_offset() const { return _code_offset; } 206 int data_offset() const { return _data_offset; } 207 208 // This field holds the beginning of the const section in the old code buffer. 209 // It is needed to fix relocations of pc-relative loads when resizing the 210 // the constant pool or moving it. 211 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; }) 212 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) } 213 214 // Sizes 215 int size() const { return _size; } 216 int header_size() const { return _header_size; } 217 int relocation_size() const { return pointer_delta_as_int((address) relocation_end(), (address) relocation_begin()); } 218 int content_size() const { return pointer_delta_as_int(content_end(), content_begin()); } 219 int code_size() const { return pointer_delta_as_int(code_end(), code_begin()); } 220 221 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed 222 void adjust_size(size_t used) { 223 _size = (int)used; 224 _data_offset = (int)used; 225 } 226 227 // Containment 228 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } 229 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); } 230 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); } 231 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe && 232 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; } 233 int frame_complete_offset() const { return _frame_complete_offset; } 234 235 // OopMap for frame 236 ImmutableOopMapSet* oop_maps() const { return _oop_maps; } 237 void set_oop_maps(OopMapSet* p); 238 239 const ImmutableOopMap* oop_map_for_slot(int slot, address return_address) const; 240 const ImmutableOopMap* oop_map_for_return_address(address return_address) const; 241 242 // Frame support. Sizes are in word units. 243 int frame_size() const { return _frame_size; } 244 void set_frame_size(int size) { _frame_size = size; } 245 246 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments 247 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } 248 249 // Naming 250 const char* name() const { return _name; } 251 void set_name(const char* name) { _name = name; } 252 253 // Debugging 254 void verify(); 255 void print() const; 256 void print_on(outputStream* st) const; 257 void print_value_on(outputStream* st) const; 258 259 void dump_for_addr(address addr, outputStream* st, bool verbose) const; 260 void print_code_on(outputStream* st); 261 262 // Print to stream, any comments associated with offset. 263 void print_block_comment(outputStream* stream, address block_begin) const; 264 265 #ifndef PRODUCT 266 AsmRemarks &asm_remarks() { return _asm_remarks; } 267 DbgStrings &dbg_strings() { return _dbg_strings; } 268 269 void use_remarks(AsmRemarks &remarks) { _asm_remarks.share(remarks); } 270 void use_strings(DbgStrings &strings) { _dbg_strings.share(strings); } 271 #endif 272 }; 273 274 //---------------------------------------------------------------------------------------------------- 275 // RuntimeBlob: used for non-compiled method code (adapters, stubs, blobs) 276 277 class RuntimeBlob : public CodeBlob { 278 friend class VMStructs; 279 public: 280 281 // Creation 282 // a) simple CodeBlob 283 RuntimeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) 284 : CodeBlob(name, kind, size, header_size) 285 {} 286 287 // b) full CodeBlob 288 // frame_complete is the offset from the beginning of the instructions 289 // to where the frame setup (from stackwalk viewpoint) is complete. 290 RuntimeBlob( 291 const char* name, 292 CodeBlobKind kind, 293 CodeBuffer* cb, 294 int size, 295 uint16_t header_size, 296 int16_t frame_complete, 297 int frame_size, 298 OopMapSet* oop_maps, 299 bool caller_must_gc_arguments = false 300 ); 301 302 static void free(RuntimeBlob* blob); 303 304 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService. 305 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = ""); 306 307 class Vptr : public CodeBlob::Vptr { 308 }; 309 }; 310 311 class WhiteBox; 312 //---------------------------------------------------------------------------------------------------- 313 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc. 314 315 class BufferBlob: public RuntimeBlob { 316 friend class VMStructs; 317 friend class AdapterBlob; 318 friend class VtableBlob; 319 friend class MethodHandlesAdapterBlob; 320 friend class UpcallStub; 321 friend class WhiteBox; 322 323 private: 324 // Creation support 325 BufferBlob(const char* name, CodeBlobKind kind, int size); 326 BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size); 327 328 void* operator new(size_t s, unsigned size) throw(); 329 330 public: 331 // Creation 332 static BufferBlob* create(const char* name, uint buffer_size); 333 static BufferBlob* create(const char* name, CodeBuffer* cb); 334 335 static void free(BufferBlob* buf); 336 337 void print_on_impl(outputStream* st) const; 338 void print_value_on_impl(outputStream* st) const; 339 340 class Vptr : public RuntimeBlob::Vptr { 341 void print_on(const CodeBlob* instance, outputStream* st) const override { 342 ((const BufferBlob*)instance)->print_on_impl(st); 343 } 344 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 345 ((const BufferBlob*)instance)->print_value_on_impl(st); 346 } 347 }; 348 349 static const Vptr _vpntr; 350 }; 351 352 353 //---------------------------------------------------------------------------------------------------- 354 // AdapterBlob: used to hold C2I/I2C adapters 355 356 class AdapterBlob: public BufferBlob { 357 private: 358 AdapterBlob(int size, CodeBuffer* cb); 359 360 public: 361 // Creation 362 static AdapterBlob* create(CodeBuffer* cb); 363 }; 364 365 //--------------------------------------------------------------------------------------------------- 366 class VtableBlob: public BufferBlob { 367 private: 368 VtableBlob(const char*, int); 369 370 void* operator new(size_t s, unsigned size) throw(); 371 372 public: 373 // Creation 374 static VtableBlob* create(const char* name, int buffer_size); 375 }; 376 377 //---------------------------------------------------------------------------------------------------- 378 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters 379 380 class MethodHandlesAdapterBlob: public BufferBlob { 381 private: 382 MethodHandlesAdapterBlob(int size): BufferBlob("MethodHandles adapters", CodeBlobKind::MHAdapter, size) {} 383 384 public: 385 // Creation 386 static MethodHandlesAdapterBlob* create(int buffer_size); 387 }; 388 389 390 //---------------------------------------------------------------------------------------------------- 391 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine 392 393 class RuntimeStub: public RuntimeBlob { 394 friend class VMStructs; 395 private: 396 // Creation support 397 RuntimeStub( 398 const char* name, 399 CodeBuffer* cb, 400 int size, 401 int16_t frame_complete, 402 int frame_size, 403 OopMapSet* oop_maps, 404 bool caller_must_gc_arguments 405 ); 406 407 void* operator new(size_t s, unsigned size) throw(); 408 409 public: 410 // Creation 411 static RuntimeStub* new_runtime_stub( 412 const char* stub_name, 413 CodeBuffer* cb, 414 int16_t frame_complete, 415 int frame_size, 416 OopMapSet* oop_maps, 417 bool caller_must_gc_arguments, 418 bool alloc_fail_is_fatal=true 419 ); 420 421 static void free(RuntimeStub* stub) { RuntimeBlob::free(stub); } 422 423 address entry_point() const { return code_begin(); } 424 425 void print_on_impl(outputStream* st) const; 426 void print_value_on_impl(outputStream* st) const; 427 428 class Vptr : public RuntimeBlob::Vptr { 429 void print_on(const CodeBlob* instance, outputStream* st) const override { 430 instance->as_runtime_stub()->print_on_impl(st); 431 } 432 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 433 instance->as_runtime_stub()->print_value_on_impl(st); 434 } 435 }; 436 437 static const Vptr _vpntr; 438 }; 439 440 441 //---------------------------------------------------------------------------------------------------- 442 // Super-class for all blobs that exist in only one instance. Implements default behaviour. 443 444 class SingletonBlob: public RuntimeBlob { 445 friend class VMStructs; 446 447 protected: 448 void* operator new(size_t s, unsigned size) throw(); 449 450 public: 451 SingletonBlob( 452 const char* name, 453 CodeBlobKind kind, 454 CodeBuffer* cb, 455 int size, 456 uint16_t header_size, 457 int frame_size, 458 OopMapSet* oop_maps 459 ) 460 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, frame_size, oop_maps) 461 {}; 462 463 address entry_point() { return code_begin(); } 464 465 void print_on_impl(outputStream* st) const; 466 void print_value_on_impl(outputStream* st) const; 467 468 class Vptr : public RuntimeBlob::Vptr { 469 void print_on(const CodeBlob* instance, outputStream* st) const override { 470 ((const SingletonBlob*)instance)->print_on_impl(st); 471 } 472 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 473 ((const SingletonBlob*)instance)->print_value_on_impl(st); 474 } 475 }; 476 477 static const Vptr _vpntr; 478 }; 479 480 481 //---------------------------------------------------------------------------------------------------- 482 // DeoptimizationBlob 483 484 class DeoptimizationBlob: public SingletonBlob { 485 friend class VMStructs; 486 friend class JVMCIVMStructs; 487 private: 488 int _unpack_offset; 489 int _unpack_with_exception; 490 int _unpack_with_reexecution; 491 492 int _unpack_with_exception_in_tls; 493 494 #if INCLUDE_JVMCI 495 // Offsets when JVMCI calls uncommon_trap. 496 int _uncommon_trap_offset; 497 int _implicit_exception_uncommon_trap_offset; 498 #endif 499 500 // Creation support 501 DeoptimizationBlob( 502 CodeBuffer* cb, 503 int size, 504 OopMapSet* oop_maps, 505 int unpack_offset, 506 int unpack_with_exception_offset, 507 int unpack_with_reexecution_offset, 508 int frame_size 509 ); 510 511 public: 512 // Creation 513 static DeoptimizationBlob* create( 514 CodeBuffer* cb, 515 OopMapSet* oop_maps, 516 int unpack_offset, 517 int unpack_with_exception_offset, 518 int unpack_with_reexecution_offset, 519 int frame_size 520 ); 521 522 address unpack() const { return code_begin() + _unpack_offset; } 523 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; } 524 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; } 525 526 // Alternate entry point for C1 where the exception and issuing pc 527 // are in JavaThread::_exception_oop and JavaThread::_exception_pc 528 // instead of being in registers. This is needed because C1 doesn't 529 // model exception paths in a way that keeps these registers free so 530 // there may be live values in those registers during deopt. 531 void set_unpack_with_exception_in_tls_offset(int offset) { 532 _unpack_with_exception_in_tls = offset; 533 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); 534 } 535 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; } 536 537 #if INCLUDE_JVMCI 538 // Offsets when JVMCI calls uncommon_trap. 539 void set_uncommon_trap_offset(int offset) { 540 _uncommon_trap_offset = offset; 541 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob"); 542 } 543 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; } 544 545 void set_implicit_exception_uncommon_trap_offset(int offset) { 546 _implicit_exception_uncommon_trap_offset = offset; 547 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob"); 548 } 549 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; } 550 #endif // INCLUDE_JVMCI 551 552 void print_value_on_impl(outputStream* st) const; 553 554 class Vptr : public SingletonBlob::Vptr { 555 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 556 ((const DeoptimizationBlob*)instance)->print_value_on_impl(st); 557 } 558 }; 559 560 static const Vptr _vpntr; 561 }; 562 563 564 //---------------------------------------------------------------------------------------------------- 565 // UncommonTrapBlob (currently only used by Compiler 2) 566 567 #ifdef COMPILER2 568 569 class UncommonTrapBlob: public SingletonBlob { 570 friend class VMStructs; 571 private: 572 // Creation support 573 UncommonTrapBlob( 574 CodeBuffer* cb, 575 int size, 576 OopMapSet* oop_maps, 577 int frame_size 578 ); 579 580 public: 581 // Creation 582 static UncommonTrapBlob* create( 583 CodeBuffer* cb, 584 OopMapSet* oop_maps, 585 int frame_size 586 ); 587 }; 588 589 590 //---------------------------------------------------------------------------------------------------- 591 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) 592 593 class ExceptionBlob: public SingletonBlob { 594 friend class VMStructs; 595 private: 596 // Creation support 597 ExceptionBlob( 598 CodeBuffer* cb, 599 int size, 600 OopMapSet* oop_maps, 601 int frame_size 602 ); 603 604 public: 605 // Creation 606 static ExceptionBlob* create( 607 CodeBuffer* cb, 608 OopMapSet* oop_maps, 609 int frame_size 610 ); 611 }; 612 #endif // COMPILER2 613 614 615 //---------------------------------------------------------------------------------------------------- 616 // SafepointBlob: handles illegal_instruction exceptions during a safepoint 617 618 class SafepointBlob: public SingletonBlob { 619 friend class VMStructs; 620 private: 621 // Creation support 622 SafepointBlob( 623 CodeBuffer* cb, 624 int size, 625 OopMapSet* oop_maps, 626 int frame_size 627 ); 628 629 public: 630 // Creation 631 static SafepointBlob* create( 632 CodeBuffer* cb, 633 OopMapSet* oop_maps, 634 int frame_size 635 ); 636 }; 637 638 //---------------------------------------------------------------------------------------------------- 639 640 class UpcallLinker; 641 642 // A (Panama) upcall stub. Not used by JNI. 643 class UpcallStub: public RuntimeBlob { 644 friend class VMStructs; 645 friend class UpcallLinker; 646 private: 647 jobject _receiver; 648 ByteSize _frame_data_offset; 649 650 UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset); 651 652 void* operator new(size_t s, unsigned size) throw(); 653 654 struct FrameData { 655 JavaFrameAnchor jfa; 656 JavaThread* thread; 657 JNIHandleBlock* old_handles; 658 JNIHandleBlock* new_handles; 659 }; 660 661 // defined in frame_ARCH.cpp 662 FrameData* frame_data_for_frame(const frame& frame) const; 663 public: 664 // Creation 665 static UpcallStub* create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset); 666 667 static void free(UpcallStub* blob); 668 669 jobject receiver() { return _receiver; } 670 671 JavaFrameAnchor* jfa_for_frame(const frame& frame) const; 672 673 // GC support 674 void oops_do(OopClosure* f, const frame& frame); 675 676 void print_on_impl(outputStream* st) const; 677 void print_value_on_impl(outputStream* st) const; 678 679 class Vptr : public RuntimeBlob::Vptr { 680 void print_on(const CodeBlob* instance, outputStream* st) const override { 681 instance->as_upcall_stub()->print_on_impl(st); 682 } 683 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 684 instance->as_upcall_stub()->print_value_on_impl(st); 685 } 686 }; 687 688 static const Vptr _vpntr; 689 }; 690 691 #endif // SHARE_CODE_CODEBLOB_HPP