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 // BufferedInlineTypeBlob : used for pack/unpack handlers 62 // RuntimeStub : Call to VM runtime methods 63 // SingletonBlob : Super-class for all blobs that exist in only one instance 64 // DeoptimizationBlob : Used for deoptimization 65 // SafepointBlob : Used to handle illegal instruction exceptions 66 // ExceptionBlob : Used for stack unrolling 67 // UncommonTrapBlob : Used to handle uncommon traps 68 // UpcallStub : Used for upcalls from native code 69 // 70 // 71 // Layout : continuous in the CodeCache 72 // - header 73 // - relocation 74 // - content space 75 // - instruction space 76 // - data space 77 78 enum class CodeBlobKind : u1 { 79 None, 80 Nmethod, 81 Buffer, 82 Adapter, 83 Vtable, 84 MHAdapter, 85 BufferedInlineType, 86 RuntimeStub, 87 Deoptimization, 88 Safepoint, 89 #ifdef COMPILER2 90 Exception, 91 UncommonTrap, 92 #endif 93 Upcall, 94 Number_Of_Kinds 95 }; 96 97 class UpcallStub; // for as_upcall_stub() 98 class RuntimeStub; // for as_runtime_stub() 99 class JavaFrameAnchor; // for UpcallStub::jfa_for_frame 100 101 class CodeBlob { 102 friend class VMStructs; 103 friend class JVMCIVMStructs; 104 105 protected: 106 // order fields from large to small to minimize padding between fields 107 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob 108 const char* _name; 109 110 int _size; // total size of CodeBlob in bytes 111 int _relocation_size; // size of relocation (could be bigger than 64Kb) 112 int _content_offset; // offset to where content region begins (this includes consts, insts, stubs) 113 int _code_offset; // offset to where instructions region begins (this includes insts, stubs) 114 115 int _data_offset; // offset to where data region begins 116 int _frame_size; // size of stack frame in words (NOT slots. On x64 these are 64bit words) 117 118 S390_ONLY(int _ctable_offset;) 119 120 uint16_t _header_size; // size of header (depends on subclass) 121 int16_t _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have 122 // not finished setting up their frame. Beware of pc's in 123 // that range. There is a similar range(s) on returns 124 // which we don't detect. 125 126 CodeBlobKind _kind; // Kind of this code blob 127 128 bool _caller_must_gc_arguments; 129 130 #ifndef PRODUCT 131 AsmRemarks _asm_remarks; 132 DbgStrings _dbg_strings; 133 #endif 134 135 void print_on_impl(outputStream* st) const; 136 void print_value_on_impl(outputStream* st) const; 137 138 class Vptr { 139 public: 140 virtual void print_on(const CodeBlob* instance, outputStream* st) const = 0; 141 virtual void print_value_on(const CodeBlob* instance, outputStream* st) const = 0; 142 }; 143 144 const Vptr* vptr() const; 145 146 CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size, 147 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments); 148 149 // Simple CodeBlob used for simple BufferBlob. 150 CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size); 151 152 void operator delete(void* p) { } 153 154 public: 155 156 ~CodeBlob() { 157 assert(_oop_maps == nullptr, "Not flushed"); 158 } 159 160 // Returns the space needed for CodeBlob 161 static unsigned int allocation_size(CodeBuffer* cb, int header_size); 162 static unsigned int align_code_offset(int offset); 163 164 // Deletion 165 void purge(); 166 167 // Typing 168 bool is_nmethod() const { return _kind == CodeBlobKind::Nmethod; } 169 bool is_buffer_blob() const { return _kind == CodeBlobKind::Buffer; } 170 bool is_runtime_stub() const { return _kind == CodeBlobKind::RuntimeStub; } 171 bool is_deoptimization_stub() const { return _kind == CodeBlobKind::Deoptimization; } 172 #ifdef COMPILER2 173 bool is_uncommon_trap_stub() const { return _kind == CodeBlobKind::UncommonTrap; } 174 bool is_exception_stub() const { return _kind == CodeBlobKind::Exception; } 175 #else 176 bool is_uncommon_trap_stub() const { return false; } 177 bool is_exception_stub() const { return false; } 178 #endif 179 bool is_safepoint_stub() const { return _kind == CodeBlobKind::Safepoint; } 180 bool is_adapter_blob() const { return _kind == CodeBlobKind::Adapter; } 181 bool is_vtable_blob() const { return _kind == CodeBlobKind::Vtable; } 182 bool is_method_handles_adapter_blob() const { return _kind == CodeBlobKind::MHAdapter; } 183 bool is_buffered_inline_type_blob() const { return _kind == CodeBlobKind::BufferedInlineType; } 184 bool is_upcall_stub() const { return _kind == CodeBlobKind::Upcall; } 185 186 // Casting 187 nmethod* as_nmethod_or_null() const { return is_nmethod() ? (nmethod*) this : nullptr; } 188 nmethod* as_nmethod() const { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; } 189 CodeBlob* as_codeblob() const { return (CodeBlob*) this; } 190 UpcallStub* as_upcall_stub() const { assert(is_upcall_stub(), "must be upcall stub"); return (UpcallStub*) this; } 191 RuntimeStub* as_runtime_stub() const { assert(is_runtime_stub(), "must be runtime blob"); return (RuntimeStub*) this; } 192 193 // Boundaries 194 address header_begin() const { return (address) this; } 195 address header_end() const { return ((address) this) + _header_size; } 196 relocInfo* relocation_begin() const { return (relocInfo*) header_end(); } 197 relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } 198 address content_begin() const { return (address) header_begin() + _content_offset; } 199 address content_end() const { return (address) header_begin() + _data_offset; } 200 address code_begin() const { return (address) header_begin() + _code_offset; } 201 // code_end == content_end is true for all types of blobs for now, it is also checked in the constructor 202 address code_end() const { return (address) header_begin() + _data_offset; } 203 address data_begin() const { return (address) header_begin() + _data_offset; } 204 address data_end() const { return (address) header_begin() + _size; } 205 206 // Offsets 207 int content_offset() const { return _content_offset; } 208 int code_offset() const { return _code_offset; } 209 int data_offset() const { return _data_offset; } 210 211 // This field holds the beginning of the const section in the old code buffer. 212 // It is needed to fix relocations of pc-relative loads when resizing the 213 // the constant pool or moving it. 214 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; }) 215 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) } 216 217 // Sizes 218 int size() const { return _size; } 219 int header_size() const { return _header_size; } 220 int relocation_size() const { return pointer_delta_as_int((address) relocation_end(), (address) relocation_begin()); } 221 int content_size() const { return pointer_delta_as_int(content_end(), content_begin()); } 222 int code_size() const { return pointer_delta_as_int(code_end(), code_begin()); } 223 224 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed 225 void adjust_size(size_t used) { 226 _size = (int)used; 227 _data_offset = (int)used; 228 } 229 230 // Containment 231 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } 232 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); } 233 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); } 234 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe && 235 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; } 236 int frame_complete_offset() const { return _frame_complete_offset; } 237 238 // OopMap for frame 239 ImmutableOopMapSet* oop_maps() const { return _oop_maps; } 240 void set_oop_maps(OopMapSet* p); 241 242 const ImmutableOopMap* oop_map_for_slot(int slot, address return_address) const; 243 const ImmutableOopMap* oop_map_for_return_address(address return_address) const; 244 245 // Frame support. Sizes are in word units. 246 int frame_size() const { return _frame_size; } 247 void set_frame_size(int size) { _frame_size = size; } 248 249 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments 250 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } 251 252 // Naming 253 const char* name() const { return _name; } 254 void set_name(const char* name) { _name = name; } 255 256 // Debugging 257 void verify(); 258 void print() const; 259 void print_on(outputStream* st) const; 260 void print_value_on(outputStream* st) const; 261 262 void dump_for_addr(address addr, outputStream* st, bool verbose) const; 263 void print_code_on(outputStream* st); 264 265 // Print to stream, any comments associated with offset. 266 void print_block_comment(outputStream* stream, address block_begin) const; 267 268 #ifndef PRODUCT 269 AsmRemarks &asm_remarks() { return _asm_remarks; } 270 DbgStrings &dbg_strings() { return _dbg_strings; } 271 272 void use_remarks(AsmRemarks &remarks) { _asm_remarks.share(remarks); } 273 void use_strings(DbgStrings &strings) { _dbg_strings.share(strings); } 274 #endif 275 }; 276 277 //---------------------------------------------------------------------------------------------------- 278 // RuntimeBlob: used for non-compiled method code (adapters, stubs, blobs) 279 280 class RuntimeBlob : public CodeBlob { 281 friend class VMStructs; 282 public: 283 284 // Creation 285 // a) simple CodeBlob 286 RuntimeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) 287 : CodeBlob(name, kind, size, header_size) 288 {} 289 290 // b) full CodeBlob 291 // frame_complete is the offset from the beginning of the instructions 292 // to where the frame setup (from stackwalk viewpoint) is complete. 293 RuntimeBlob( 294 const char* name, 295 CodeBlobKind kind, 296 CodeBuffer* cb, 297 int size, 298 uint16_t header_size, 299 int16_t frame_complete, 300 int frame_size, 301 OopMapSet* oop_maps, 302 bool caller_must_gc_arguments = false 303 ); 304 305 static void free(RuntimeBlob* blob); 306 307 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService. 308 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = ""); 309 310 class Vptr : public CodeBlob::Vptr { 311 }; 312 }; 313 314 class WhiteBox; 315 //---------------------------------------------------------------------------------------------------- 316 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc. 317 318 class BufferBlob: public RuntimeBlob { 319 friend class VMStructs; 320 friend class AdapterBlob; 321 friend class VtableBlob; 322 friend class MethodHandlesAdapterBlob; 323 friend class BufferedInlineTypeBlob; 324 friend class UpcallStub; 325 friend class WhiteBox; 326 327 private: 328 // Creation support 329 BufferBlob(const char* name, CodeBlobKind kind, int size); 330 BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, int header_size); 331 BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false); 332 333 void* operator new(size_t s, unsigned size) throw(); 334 335 public: 336 // Creation 337 static BufferBlob* create(const char* name, uint buffer_size); 338 static BufferBlob* create(const char* name, CodeBuffer* cb); 339 340 static void free(BufferBlob* buf); 341 342 void print_on_impl(outputStream* st) const; 343 void print_value_on_impl(outputStream* st) const; 344 345 class Vptr : public RuntimeBlob::Vptr { 346 void print_on(const CodeBlob* instance, outputStream* st) const override { 347 ((const BufferBlob*)instance)->print_on_impl(st); 348 } 349 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 350 ((const BufferBlob*)instance)->print_value_on_impl(st); 351 } 352 }; 353 354 static const Vptr _vpntr; 355 }; 356 357 358 //---------------------------------------------------------------------------------------------------- 359 // AdapterBlob: used to hold C2I/I2C adapters 360 361 class AdapterBlob: public BufferBlob { 362 private: 363 AdapterBlob(int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false); 364 365 public: 366 // Creation 367 static AdapterBlob* create(CodeBuffer* cb, 368 int frame_complete, 369 int frame_size, 370 OopMapSet* oop_maps, 371 bool caller_must_gc_arguments = false); 372 373 bool caller_must_gc_arguments(JavaThread* thread) const { return true; } 374 }; 375 376 //--------------------------------------------------------------------------------------------------- 377 class VtableBlob: public BufferBlob { 378 private: 379 VtableBlob(const char*, int); 380 381 void* operator new(size_t s, unsigned size) throw(); 382 383 public: 384 // Creation 385 static VtableBlob* create(const char* name, int buffer_size); 386 }; 387 388 //---------------------------------------------------------------------------------------------------- 389 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters 390 391 class MethodHandlesAdapterBlob: public BufferBlob { 392 private: 393 MethodHandlesAdapterBlob(int size): BufferBlob("MethodHandles adapters", CodeBlobKind::MHAdapter, size) {} 394 395 public: 396 // Creation 397 static MethodHandlesAdapterBlob* create(int buffer_size); 398 }; 399 400 //---------------------------------------------------------------------------------------------------- 401 // BufferedInlineTypeBlob : used for pack/unpack handlers 402 403 class BufferedInlineTypeBlob: public BufferBlob { 404 private: 405 const int _pack_fields_off; 406 const int _pack_fields_jobject_off; 407 const int _unpack_fields_off; 408 409 BufferedInlineTypeBlob(int size, CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off); 410 411 public: 412 // Creation 413 static BufferedInlineTypeBlob* create(CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off); 414 415 address pack_fields() const { return code_begin() + _pack_fields_off; } 416 address pack_fields_jobject() const { return code_begin() + _pack_fields_jobject_off; } 417 address unpack_fields() const { return code_begin() + _unpack_fields_off; } 418 }; 419 420 //---------------------------------------------------------------------------------------------------- 421 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine 422 423 class RuntimeStub: public RuntimeBlob { 424 friend class VMStructs; 425 private: 426 // Creation support 427 RuntimeStub( 428 const char* name, 429 CodeBuffer* cb, 430 int size, 431 int16_t frame_complete, 432 int frame_size, 433 OopMapSet* oop_maps, 434 bool caller_must_gc_arguments 435 ); 436 437 void* operator new(size_t s, unsigned size) throw(); 438 439 public: 440 // Creation 441 static RuntimeStub* new_runtime_stub( 442 const char* stub_name, 443 CodeBuffer* cb, 444 int16_t frame_complete, 445 int frame_size, 446 OopMapSet* oop_maps, 447 bool caller_must_gc_arguments, 448 bool alloc_fail_is_fatal=true 449 ); 450 451 static void free(RuntimeStub* stub) { RuntimeBlob::free(stub); } 452 453 address entry_point() const { return code_begin(); } 454 455 void print_on_impl(outputStream* st) const; 456 void print_value_on_impl(outputStream* st) const; 457 458 class Vptr : public RuntimeBlob::Vptr { 459 void print_on(const CodeBlob* instance, outputStream* st) const override { 460 instance->as_runtime_stub()->print_on_impl(st); 461 } 462 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 463 instance->as_runtime_stub()->print_value_on_impl(st); 464 } 465 }; 466 467 static const Vptr _vpntr; 468 }; 469 470 471 //---------------------------------------------------------------------------------------------------- 472 // Super-class for all blobs that exist in only one instance. Implements default behaviour. 473 474 class SingletonBlob: public RuntimeBlob { 475 friend class VMStructs; 476 477 protected: 478 void* operator new(size_t s, unsigned size) throw(); 479 480 public: 481 SingletonBlob( 482 const char* name, 483 CodeBlobKind kind, 484 CodeBuffer* cb, 485 int size, 486 uint16_t header_size, 487 int frame_size, 488 OopMapSet* oop_maps 489 ) 490 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, frame_size, oop_maps) 491 {}; 492 493 address entry_point() { return code_begin(); } 494 495 void print_on_impl(outputStream* st) const; 496 void print_value_on_impl(outputStream* st) const; 497 498 class Vptr : public RuntimeBlob::Vptr { 499 void print_on(const CodeBlob* instance, outputStream* st) const override { 500 ((const SingletonBlob*)instance)->print_on_impl(st); 501 } 502 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 503 ((const SingletonBlob*)instance)->print_value_on_impl(st); 504 } 505 }; 506 507 static const Vptr _vpntr; 508 }; 509 510 511 //---------------------------------------------------------------------------------------------------- 512 // DeoptimizationBlob 513 514 class DeoptimizationBlob: public SingletonBlob { 515 friend class VMStructs; 516 friend class JVMCIVMStructs; 517 private: 518 int _unpack_offset; 519 int _unpack_with_exception; 520 int _unpack_with_reexecution; 521 522 int _unpack_with_exception_in_tls; 523 524 #if INCLUDE_JVMCI 525 // Offsets when JVMCI calls uncommon_trap. 526 int _uncommon_trap_offset; 527 int _implicit_exception_uncommon_trap_offset; 528 #endif 529 530 // Creation support 531 DeoptimizationBlob( 532 CodeBuffer* cb, 533 int size, 534 OopMapSet* oop_maps, 535 int unpack_offset, 536 int unpack_with_exception_offset, 537 int unpack_with_reexecution_offset, 538 int frame_size 539 ); 540 541 public: 542 // Creation 543 static DeoptimizationBlob* create( 544 CodeBuffer* cb, 545 OopMapSet* oop_maps, 546 int unpack_offset, 547 int unpack_with_exception_offset, 548 int unpack_with_reexecution_offset, 549 int frame_size 550 ); 551 552 address unpack() const { return code_begin() + _unpack_offset; } 553 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; } 554 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; } 555 556 // Alternate entry point for C1 where the exception and issuing pc 557 // are in JavaThread::_exception_oop and JavaThread::_exception_pc 558 // instead of being in registers. This is needed because C1 doesn't 559 // model exception paths in a way that keeps these registers free so 560 // there may be live values in those registers during deopt. 561 void set_unpack_with_exception_in_tls_offset(int offset) { 562 _unpack_with_exception_in_tls = offset; 563 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); 564 } 565 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; } 566 567 #if INCLUDE_JVMCI 568 // Offsets when JVMCI calls uncommon_trap. 569 void set_uncommon_trap_offset(int offset) { 570 _uncommon_trap_offset = offset; 571 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob"); 572 } 573 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; } 574 575 void set_implicit_exception_uncommon_trap_offset(int offset) { 576 _implicit_exception_uncommon_trap_offset = offset; 577 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob"); 578 } 579 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; } 580 #endif // INCLUDE_JVMCI 581 582 void print_value_on_impl(outputStream* st) const; 583 584 class Vptr : public SingletonBlob::Vptr { 585 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 586 ((const DeoptimizationBlob*)instance)->print_value_on_impl(st); 587 } 588 }; 589 590 static const Vptr _vpntr; 591 }; 592 593 594 //---------------------------------------------------------------------------------------------------- 595 // UncommonTrapBlob (currently only used by Compiler 2) 596 597 #ifdef COMPILER2 598 599 class UncommonTrapBlob: public SingletonBlob { 600 friend class VMStructs; 601 private: 602 // Creation support 603 UncommonTrapBlob( 604 CodeBuffer* cb, 605 int size, 606 OopMapSet* oop_maps, 607 int frame_size 608 ); 609 610 public: 611 // Creation 612 static UncommonTrapBlob* create( 613 CodeBuffer* cb, 614 OopMapSet* oop_maps, 615 int frame_size 616 ); 617 }; 618 619 620 //---------------------------------------------------------------------------------------------------- 621 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) 622 623 class ExceptionBlob: public SingletonBlob { 624 friend class VMStructs; 625 private: 626 // Creation support 627 ExceptionBlob( 628 CodeBuffer* cb, 629 int size, 630 OopMapSet* oop_maps, 631 int frame_size 632 ); 633 634 public: 635 // Creation 636 static ExceptionBlob* create( 637 CodeBuffer* cb, 638 OopMapSet* oop_maps, 639 int frame_size 640 ); 641 }; 642 #endif // COMPILER2 643 644 645 //---------------------------------------------------------------------------------------------------- 646 // SafepointBlob: handles illegal_instruction exceptions during a safepoint 647 648 class SafepointBlob: public SingletonBlob { 649 friend class VMStructs; 650 private: 651 // Creation support 652 SafepointBlob( 653 CodeBuffer* cb, 654 int size, 655 OopMapSet* oop_maps, 656 int frame_size 657 ); 658 659 public: 660 // Creation 661 static SafepointBlob* create( 662 CodeBuffer* cb, 663 OopMapSet* oop_maps, 664 int frame_size 665 ); 666 }; 667 668 //---------------------------------------------------------------------------------------------------- 669 670 class UpcallLinker; 671 672 // A (Panama) upcall stub. Not used by JNI. 673 class UpcallStub: public RuntimeBlob { 674 friend class VMStructs; 675 friend class UpcallLinker; 676 private: 677 jobject _receiver; 678 ByteSize _frame_data_offset; 679 680 UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset); 681 682 void* operator new(size_t s, unsigned size) throw(); 683 684 struct FrameData { 685 JavaFrameAnchor jfa; 686 JavaThread* thread; 687 JNIHandleBlock* old_handles; 688 JNIHandleBlock* new_handles; 689 }; 690 691 // defined in frame_ARCH.cpp 692 FrameData* frame_data_for_frame(const frame& frame) const; 693 public: 694 // Creation 695 static UpcallStub* create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset); 696 697 static void free(UpcallStub* blob); 698 699 jobject receiver() { return _receiver; } 700 701 JavaFrameAnchor* jfa_for_frame(const frame& frame) const; 702 703 // GC support 704 void oops_do(OopClosure* f, const frame& frame); 705 706 void print_on_impl(outputStream* st) const; 707 void print_value_on_impl(outputStream* st) const; 708 709 class Vptr : public RuntimeBlob::Vptr { 710 void print_on(const CodeBlob* instance, outputStream* st) const override { 711 instance->as_upcall_stub()->print_on_impl(st); 712 } 713 void print_value_on(const CodeBlob* instance, outputStream* st) const override { 714 instance->as_upcall_stub()->print_value_on_impl(st); 715 } 716 }; 717 718 static const Vptr _vpntr; 719 }; 720 721 #endif // SHARE_CODE_CODEBLOB_HPP