37 // - relocation 38 // - instruction space 39 // - data space 40 class DeoptimizationBlob; 41 42 class CodeBlob VALUE_OBJ_CLASS_SPEC { 43 44 friend class VMStructs; 45 46 private: 47 const char* _name; 48 int _size; // total size of CodeBlob in bytes 49 int _header_size; // size of header (depends on subclass) 50 int _relocation_size; // size of relocation 51 int _instructions_offset; // offset to where instructions region begins 52 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have 53 // not finished setting up their frame. Beware of pc's in 54 // that range. There is a similar range(s) on returns 55 // which we don't detect. 56 int _data_offset; // offset to where data region begins 57 int _oops_offset; // offset to where embedded oop table begins (inside data) 58 int _oops_length; // number of embedded oops 59 int _frame_size; // size of stack frame 60 OopMapSet* _oop_maps; // OopMap for this CodeBlob 61 CodeComments _comments; 62 63 friend class OopRecorder; 64 65 void fix_oop_relocations(address begin, address end, bool initialize_immediates); 66 inline void initialize_immediate_oop(oop* dest, jobject handle); 67 68 public: 69 // Returns the space needed for CodeBlob 70 static unsigned int allocation_size(CodeBuffer* cb, int header_size); 71 72 // Creation 73 // a) simple CodeBlob 74 // frame_complete is the offset from the beginning of the instructions 75 // to where the frame setup (from stackwalk viewpoint) is complete. 76 CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size); 77 78 // b) full CodeBlob 79 CodeBlob( 80 const char* name, 81 CodeBuffer* cb, 82 int header_size, 83 int size, 84 int frame_complete, 85 int frame_size, 86 OopMapSet* oop_maps 87 ); 98 virtual bool is_exception_stub() const { return false; } 99 virtual bool is_safepoint_stub() const { return false; } 100 virtual bool is_adapter_blob() const { return false; } 101 virtual bool is_method_handles_adapter_blob() const { return false; } 102 103 virtual bool is_compiled_by_c2() const { return false; } 104 virtual bool is_compiled_by_c1() const { return false; } 105 106 // Casting 107 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; } 108 109 // Boundaries 110 address header_begin() const { return (address) this; } 111 address header_end() const { return ((address) this) + _header_size; }; 112 relocInfo* relocation_begin() const { return (relocInfo*) header_end(); }; 113 relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } 114 address instructions_begin() const { return (address) header_begin() + _instructions_offset; } 115 address instructions_end() const { return (address) header_begin() + _data_offset; } 116 address data_begin() const { return (address) header_begin() + _data_offset; } 117 address data_end() const { return (address) header_begin() + _size; } 118 oop* oops_begin() const { return (oop*) (header_begin() + _oops_offset); } 119 oop* oops_end() const { return oops_begin() + _oops_length; } 120 121 // Offsets 122 int relocation_offset() const { return _header_size; } 123 int instructions_offset() const { return _instructions_offset; } 124 int data_offset() const { return _data_offset; } 125 int oops_offset() const { return _oops_offset; } 126 127 // Sizes 128 int size() const { return _size; } 129 int header_size() const { return _header_size; } 130 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); } 131 int instructions_size() const { return instructions_end() - instructions_begin(); } 132 int data_size() const { return data_end() - data_begin(); } 133 int oops_size() const { return (address) oops_end() - (address) oops_begin(); } 134 135 // Containment 136 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } 137 bool relocation_contains(relocInfo* addr) const{ return relocation_begin() <= addr && addr < relocation_end(); } 138 bool instructions_contains(address addr) const { return instructions_begin() <= addr && addr < instructions_end(); } 139 bool data_contains(address addr) const { return data_begin() <= addr && addr < data_end(); } 140 bool oops_contains(oop* addr) const { return oops_begin() <= addr && addr < oops_end(); } 141 bool contains(address addr) const { return instructions_contains(addr); } 142 bool is_frame_complete_at(address addr) const { return instructions_contains(addr) && 143 addr >= instructions_begin() + _frame_complete_offset; } 144 145 // Relocation support 146 void fix_oop_relocations(address begin, address end) { 147 fix_oop_relocations(begin, end, false); 148 } 149 void fix_oop_relocations() { 150 fix_oop_relocations(NULL, NULL, false); 151 } 152 relocInfo::relocType reloc_type_for_address(address pc); 153 bool is_at_poll_return(address pc); 154 bool is_at_poll_or_poll_return(address pc); 155 156 // Support for oops in scopes and relocs: 157 // Note: index 0 is reserved for null. 158 oop oop_at(int index) const { return index == 0? (oop)NULL: *oop_addr_at(index); } 159 oop* oop_addr_at(int index) const{ // for GC 160 // relocation indexes are biased by 1 (because 0 is reserved) 161 assert(index > 0 && index <= _oops_length, "must be a valid non-zero index"); 162 return &oops_begin()[index-1]; 163 } 164 165 void copy_oops(GrowableArray<jobject>* oops); 166 167 // CodeCache support: really only used by the nmethods, but in order to get 168 // asserts and certain bookkeeping to work in the CodeCache they are defined 169 // virtual here. 170 virtual bool is_zombie() const { return false; } 171 virtual bool is_locked_by_vm() const { return false; } 172 173 virtual bool is_unloaded() const { return false; } 174 virtual bool is_not_entrant() const { return false; } 175 176 // GC support 177 virtual bool is_alive() const = 0; 178 virtual void do_unloading(BoolObjectClosure* is_alive, 179 OopClosure* keep_alive, 180 bool unloading_occurred); 181 virtual void oops_do(OopClosure* f) = 0; 182 // (All CodeBlob subtypes other than NMethod currently have 183 // an empty oops_do() method. 184 185 // OopMap for frame 186 OopMapSet* oop_maps() const { return _oop_maps; } 187 void set_oop_maps(OopMapSet* p); 188 OopMap* oop_map_for_return_address(address return_address); 189 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); } 190 191 // Frame support 192 int frame_size() const { return _frame_size; } 193 void set_frame_size(int size) { _frame_size = size; } 194 195 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments 196 virtual bool caller_must_gc_arguments(JavaThread* thread) const { return false; } 197 198 // Naming 199 const char* name() const { return _name; } 200 void set_name(const char* name) { _name = name; } 201 202 // Debugging 203 virtual void verify(); 228 private: 229 // Creation support 230 BufferBlob(const char* name, int size); 231 BufferBlob(const char* name, int size, CodeBuffer* cb); 232 233 void* operator new(size_t s, unsigned size); 234 235 public: 236 // Creation 237 static BufferBlob* create(const char* name, int buffer_size); 238 static BufferBlob* create(const char* name, CodeBuffer* cb); 239 240 static void free(BufferBlob* buf); 241 242 // Typing 243 virtual bool is_buffer_blob() const { return true; } 244 245 // GC/Verification support 246 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } 247 bool is_alive() const { return true; } 248 void do_unloading(BoolObjectClosure* is_alive, 249 OopClosure* keep_alive, 250 bool unloading_occurred) { /* do nothing */ } 251 252 void oops_do(OopClosure* f) { /* do nothing*/ } 253 254 void verify(); 255 void print() const PRODUCT_RETURN; 256 void print_value_on(outputStream* st) const PRODUCT_RETURN; 257 }; 258 259 260 //---------------------------------------------------------------------------------------------------- 261 // AdapterBlob: used to hold C2I/I2C adapters 262 263 class AdapterBlob: public BufferBlob { 264 private: 265 AdapterBlob(int size) : BufferBlob("I2C/C2I adapters", size) {} 266 AdapterBlob(int size, CodeBuffer* cb) : BufferBlob("I2C/C2I adapters", size, cb) {} 267 268 public: 269 // Creation 270 static AdapterBlob* create(CodeBuffer* cb); 271 272 // Typing 317 static RuntimeStub* new_runtime_stub( 318 const char* stub_name, 319 CodeBuffer* cb, 320 int frame_complete, 321 int frame_size, 322 OopMapSet* oop_maps, 323 bool caller_must_gc_arguments 324 ); 325 326 // Typing 327 bool is_runtime_stub() const { return true; } 328 329 // GC support 330 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } 331 332 address entry_point() { return instructions_begin(); } 333 334 // GC/Verification support 335 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } 336 bool is_alive() const { return true; } 337 void do_unloading(BoolObjectClosure* is_alive, 338 OopClosure* keep_alive, 339 bool unloading_occurred) { /* do nothing */ } 340 void oops_do(OopClosure* f) { /* do-nothing*/ } 341 342 void verify(); 343 void print() const PRODUCT_RETURN; 344 void print_value_on(outputStream* st) const PRODUCT_RETURN; 345 }; 346 347 348 //---------------------------------------------------------------------------------------------------- 349 // Super-class for all blobs that exist in only one instance. Implements default behaviour. 350 351 class SingletonBlob: public CodeBlob { 352 friend class VMStructs; 353 public: 354 SingletonBlob( 355 const char* name, 356 CodeBuffer* cb, 357 int header_size, 358 int size, 359 int frame_size, 360 OopMapSet* oop_maps 361 ) 362 : CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps) 363 {}; 364 365 bool is_alive() const { return true; } 366 void do_unloading(BoolObjectClosure* is_alive, 367 OopClosure* keep_alive, 368 bool unloading_occurred) { /* do-nothing*/ } 369 370 void verify(); // does nothing 371 void print() const PRODUCT_RETURN; 372 void print_value_on(outputStream* st) const PRODUCT_RETURN; 373 }; 374 375 376 //---------------------------------------------------------------------------------------------------- 377 // DeoptimizationBlob 378 379 class DeoptimizationBlob: public SingletonBlob { 380 friend class VMStructs; 381 private: 382 int _unpack_offset; 383 int _unpack_with_exception; 384 int _unpack_with_reexecution; 385 386 int _unpack_with_exception_in_tls; 387 388 // Creation support 406 int unpack_offset, 407 int unpack_with_exception_offset, 408 int unpack_with_reexecution_offset, 409 int frame_size 410 ); 411 412 // Typing 413 bool is_deoptimization_stub() const { return true; } 414 const DeoptimizationBlob *as_deoptimization_stub() const { return this; } 415 bool exception_address_is_unpack_entry(address pc) const { 416 address unpack_pc = unpack(); 417 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc); 418 } 419 420 421 422 423 // GC for args 424 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ } 425 426 // Iteration 427 void oops_do(OopClosure* f) {} 428 429 // Printing 430 void print_value_on(outputStream* st) const PRODUCT_RETURN; 431 432 address unpack() const { return instructions_begin() + _unpack_offset; } 433 address unpack_with_exception() const { return instructions_begin() + _unpack_with_exception; } 434 address unpack_with_reexecution() const { return instructions_begin() + _unpack_with_reexecution; } 435 436 // Alternate entry point for C1 where the exception and issuing pc 437 // are in JavaThread::_exception_oop and JavaThread::_exception_pc 438 // instead of being in registers. This is needed because C1 doesn't 439 // model exception paths in a way that keeps these registers free so 440 // there may be live values in those registers during deopt. 441 void set_unpack_with_exception_in_tls_offset(int offset) { 442 _unpack_with_exception_in_tls = offset; 443 assert(contains(instructions_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); 444 } 445 address unpack_with_exception_in_tls() const { return instructions_begin() + _unpack_with_exception_in_tls; } 446 }; 447 448 460 int size, 461 OopMapSet* oop_maps, 462 int frame_size 463 ); 464 465 void* operator new(size_t s, unsigned size); 466 467 public: 468 // Creation 469 static UncommonTrapBlob* create( 470 CodeBuffer* cb, 471 OopMapSet* oop_maps, 472 int frame_size 473 ); 474 475 // GC for args 476 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } 477 478 // Typing 479 bool is_uncommon_trap_stub() const { return true; } 480 481 // Iteration 482 void oops_do(OopClosure* f) {} 483 }; 484 485 486 //---------------------------------------------------------------------------------------------------- 487 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) 488 489 class ExceptionBlob: public SingletonBlob { 490 friend class VMStructs; 491 private: 492 // Creation support 493 ExceptionBlob( 494 CodeBuffer* cb, 495 int size, 496 OopMapSet* oop_maps, 497 int frame_size 498 ); 499 500 void* operator new(size_t s, unsigned size); 501 502 public: 503 // Creation 504 static ExceptionBlob* create( 505 CodeBuffer* cb, 506 OopMapSet* oop_maps, 507 int frame_size 508 ); 509 510 // GC for args 511 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } 512 513 // Typing 514 bool is_exception_stub() const { return true; } 515 516 // Iteration 517 void oops_do(OopClosure* f) {} 518 }; 519 #endif // COMPILER2 520 521 522 //---------------------------------------------------------------------------------------------------- 523 // SafepointBlob: handles illegal_instruction exceptions during a safepoint 524 525 class SafepointBlob: public SingletonBlob { 526 friend class VMStructs; 527 private: 528 // Creation support 529 SafepointBlob( 530 CodeBuffer* cb, 531 int size, 532 OopMapSet* oop_maps, 533 int frame_size 534 ); 535 536 void* operator new(size_t s, unsigned size); 537 538 public: 539 // Creation 540 static SafepointBlob* create( 541 CodeBuffer* cb, 542 OopMapSet* oop_maps, 543 int frame_size 544 ); 545 546 // GC for args 547 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } 548 549 // Typing 550 bool is_safepoint_stub() const { return true; } 551 552 // Iteration 553 void oops_do(OopClosure* f) {} 554 }; | 37 // - relocation 38 // - instruction space 39 // - data space 40 class DeoptimizationBlob; 41 42 class CodeBlob VALUE_OBJ_CLASS_SPEC { 43 44 friend class VMStructs; 45 46 private: 47 const char* _name; 48 int _size; // total size of CodeBlob in bytes 49 int _header_size; // size of header (depends on subclass) 50 int _relocation_size; // size of relocation 51 int _instructions_offset; // offset to where instructions region begins 52 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have 53 // not finished setting up their frame. Beware of pc's in 54 // that range. There is a similar range(s) on returns 55 // which we don't detect. 56 int _data_offset; // offset to where data region begins 57 int _frame_size; // size of stack frame 58 OopMapSet* _oop_maps; // OopMap for this CodeBlob 59 CodeComments _comments; 60 61 friend class OopRecorder; 62 63 public: 64 // Returns the space needed for CodeBlob 65 static unsigned int allocation_size(CodeBuffer* cb, int header_size); 66 67 // Creation 68 // a) simple CodeBlob 69 // frame_complete is the offset from the beginning of the instructions 70 // to where the frame setup (from stackwalk viewpoint) is complete. 71 CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size); 72 73 // b) full CodeBlob 74 CodeBlob( 75 const char* name, 76 CodeBuffer* cb, 77 int header_size, 78 int size, 79 int frame_complete, 80 int frame_size, 81 OopMapSet* oop_maps 82 ); 93 virtual bool is_exception_stub() const { return false; } 94 virtual bool is_safepoint_stub() const { return false; } 95 virtual bool is_adapter_blob() const { return false; } 96 virtual bool is_method_handles_adapter_blob() const { return false; } 97 98 virtual bool is_compiled_by_c2() const { return false; } 99 virtual bool is_compiled_by_c1() const { return false; } 100 101 // Casting 102 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; } 103 104 // Boundaries 105 address header_begin() const { return (address) this; } 106 address header_end() const { return ((address) this) + _header_size; }; 107 relocInfo* relocation_begin() const { return (relocInfo*) header_end(); }; 108 relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } 109 address instructions_begin() const { return (address) header_begin() + _instructions_offset; } 110 address instructions_end() const { return (address) header_begin() + _data_offset; } 111 address data_begin() const { return (address) header_begin() + _data_offset; } 112 address data_end() const { return (address) header_begin() + _size; } 113 114 // Offsets 115 int relocation_offset() const { return _header_size; } 116 int instructions_offset() const { return _instructions_offset; } 117 int data_offset() const { return _data_offset; } 118 119 // Sizes 120 int size() const { return _size; } 121 int header_size() const { return _header_size; } 122 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); } 123 int instructions_size() const { return instructions_end() - instructions_begin(); } 124 int data_size() const { return data_end() - data_begin(); } 125 126 // Containment 127 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } 128 bool relocation_contains(relocInfo* addr) const{ return relocation_begin() <= addr && addr < relocation_end(); } 129 bool instructions_contains(address addr) const { return instructions_begin() <= addr && addr < instructions_end(); } 130 bool data_contains(address addr) const { return data_begin() <= addr && addr < data_end(); } 131 bool contains(address addr) const { return instructions_contains(addr); } 132 bool is_frame_complete_at(address addr) const { return instructions_contains(addr) && 133 addr >= instructions_begin() + _frame_complete_offset; } 134 135 // CodeCache support: really only used by the nmethods, but in order to get 136 // asserts and certain bookkeeping to work in the CodeCache they are defined 137 // virtual here. 138 virtual bool is_zombie() const { return false; } 139 virtual bool is_locked_by_vm() const { return false; } 140 141 virtual bool is_unloaded() const { return false; } 142 virtual bool is_not_entrant() const { return false; } 143 144 // GC support 145 virtual bool is_alive() const = 0; 146 147 // OopMap for frame 148 OopMapSet* oop_maps() const { return _oop_maps; } 149 void set_oop_maps(OopMapSet* p); 150 OopMap* oop_map_for_return_address(address return_address); 151 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); } 152 153 // Frame support 154 int frame_size() const { return _frame_size; } 155 void set_frame_size(int size) { _frame_size = size; } 156 157 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments 158 virtual bool caller_must_gc_arguments(JavaThread* thread) const { return false; } 159 160 // Naming 161 const char* name() const { return _name; } 162 void set_name(const char* name) { _name = name; } 163 164 // Debugging 165 virtual void verify(); 190 private: 191 // Creation support 192 BufferBlob(const char* name, int size); 193 BufferBlob(const char* name, int size, CodeBuffer* cb); 194 195 void* operator new(size_t s, unsigned size); 196 197 public: 198 // Creation 199 static BufferBlob* create(const char* name, int buffer_size); 200 static BufferBlob* create(const char* name, CodeBuffer* cb); 201 202 static void free(BufferBlob* buf); 203 204 // Typing 205 virtual bool is_buffer_blob() const { return true; } 206 207 // GC/Verification support 208 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } 209 bool is_alive() const { return true; } 210 211 void verify(); 212 void print() const PRODUCT_RETURN; 213 void print_value_on(outputStream* st) const PRODUCT_RETURN; 214 }; 215 216 217 //---------------------------------------------------------------------------------------------------- 218 // AdapterBlob: used to hold C2I/I2C adapters 219 220 class AdapterBlob: public BufferBlob { 221 private: 222 AdapterBlob(int size) : BufferBlob("I2C/C2I adapters", size) {} 223 AdapterBlob(int size, CodeBuffer* cb) : BufferBlob("I2C/C2I adapters", size, cb) {} 224 225 public: 226 // Creation 227 static AdapterBlob* create(CodeBuffer* cb); 228 229 // Typing 274 static RuntimeStub* new_runtime_stub( 275 const char* stub_name, 276 CodeBuffer* cb, 277 int frame_complete, 278 int frame_size, 279 OopMapSet* oop_maps, 280 bool caller_must_gc_arguments 281 ); 282 283 // Typing 284 bool is_runtime_stub() const { return true; } 285 286 // GC support 287 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } 288 289 address entry_point() { return instructions_begin(); } 290 291 // GC/Verification support 292 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } 293 bool is_alive() const { return true; } 294 295 void verify(); 296 void print() const PRODUCT_RETURN; 297 void print_value_on(outputStream* st) const PRODUCT_RETURN; 298 }; 299 300 301 //---------------------------------------------------------------------------------------------------- 302 // Super-class for all blobs that exist in only one instance. Implements default behaviour. 303 304 class SingletonBlob: public CodeBlob { 305 friend class VMStructs; 306 public: 307 SingletonBlob( 308 const char* name, 309 CodeBuffer* cb, 310 int header_size, 311 int size, 312 int frame_size, 313 OopMapSet* oop_maps 314 ) 315 : CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps) 316 {}; 317 318 bool is_alive() const { return true; } 319 320 void verify(); // does nothing 321 void print() const PRODUCT_RETURN; 322 void print_value_on(outputStream* st) const PRODUCT_RETURN; 323 }; 324 325 326 //---------------------------------------------------------------------------------------------------- 327 // DeoptimizationBlob 328 329 class DeoptimizationBlob: public SingletonBlob { 330 friend class VMStructs; 331 private: 332 int _unpack_offset; 333 int _unpack_with_exception; 334 int _unpack_with_reexecution; 335 336 int _unpack_with_exception_in_tls; 337 338 // Creation support 356 int unpack_offset, 357 int unpack_with_exception_offset, 358 int unpack_with_reexecution_offset, 359 int frame_size 360 ); 361 362 // Typing 363 bool is_deoptimization_stub() const { return true; } 364 const DeoptimizationBlob *as_deoptimization_stub() const { return this; } 365 bool exception_address_is_unpack_entry(address pc) const { 366 address unpack_pc = unpack(); 367 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc); 368 } 369 370 371 372 373 // GC for args 374 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ } 375 376 // Printing 377 void print_value_on(outputStream* st) const PRODUCT_RETURN; 378 379 address unpack() const { return instructions_begin() + _unpack_offset; } 380 address unpack_with_exception() const { return instructions_begin() + _unpack_with_exception; } 381 address unpack_with_reexecution() const { return instructions_begin() + _unpack_with_reexecution; } 382 383 // Alternate entry point for C1 where the exception and issuing pc 384 // are in JavaThread::_exception_oop and JavaThread::_exception_pc 385 // instead of being in registers. This is needed because C1 doesn't 386 // model exception paths in a way that keeps these registers free so 387 // there may be live values in those registers during deopt. 388 void set_unpack_with_exception_in_tls_offset(int offset) { 389 _unpack_with_exception_in_tls = offset; 390 assert(contains(instructions_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); 391 } 392 address unpack_with_exception_in_tls() const { return instructions_begin() + _unpack_with_exception_in_tls; } 393 }; 394 395 407 int size, 408 OopMapSet* oop_maps, 409 int frame_size 410 ); 411 412 void* operator new(size_t s, unsigned size); 413 414 public: 415 // Creation 416 static UncommonTrapBlob* create( 417 CodeBuffer* cb, 418 OopMapSet* oop_maps, 419 int frame_size 420 ); 421 422 // GC for args 423 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } 424 425 // Typing 426 bool is_uncommon_trap_stub() const { return true; } 427 }; 428 429 430 //---------------------------------------------------------------------------------------------------- 431 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) 432 433 class ExceptionBlob: public SingletonBlob { 434 friend class VMStructs; 435 private: 436 // Creation support 437 ExceptionBlob( 438 CodeBuffer* cb, 439 int size, 440 OopMapSet* oop_maps, 441 int frame_size 442 ); 443 444 void* operator new(size_t s, unsigned size); 445 446 public: 447 // Creation 448 static ExceptionBlob* create( 449 CodeBuffer* cb, 450 OopMapSet* oop_maps, 451 int frame_size 452 ); 453 454 // GC for args 455 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } 456 457 // Typing 458 bool is_exception_stub() const { return true; } 459 }; 460 #endif // COMPILER2 461 462 463 //---------------------------------------------------------------------------------------------------- 464 // SafepointBlob: handles illegal_instruction exceptions during a safepoint 465 466 class SafepointBlob: public SingletonBlob { 467 friend class VMStructs; 468 private: 469 // Creation support 470 SafepointBlob( 471 CodeBuffer* cb, 472 int size, 473 OopMapSet* oop_maps, 474 int frame_size 475 ); 476 477 void* operator new(size_t s, unsigned size); 478 479 public: 480 // Creation 481 static SafepointBlob* create( 482 CodeBuffer* cb, 483 OopMapSet* oop_maps, 484 int frame_size 485 ); 486 487 // GC for args 488 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } 489 490 // Typing 491 bool is_safepoint_stub() const { return true; } 492 }; |