355 static address clean_static_call_entry(); 356 357 #if defined(X86) && defined(COMPILER1) 358 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available. 359 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result); 360 #endif // X86 && COMPILER1 361 362 public: 363 364 // Read the array of BasicTypes from a Java signature, and compute where 365 // compiled Java code would like to put the results. Values in reg_lo and 366 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are 367 // registers, those above refer to 4-byte stack slots. All stack slots are 368 // based off of the window top. SharedInfo::stack0 refers to the first usable 369 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word 370 // 4-bytes higher. So for sparc because the register window save area is at 371 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 372 // will be just above it. ( 373 // return value is the maximum number of VMReg stack slots the convention will use. 374 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing); 375 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed); 376 static const uint java_return_convention_max_int; 377 static const uint java_return_convention_max_float; 378 379 static void check_member_name_argument_is_last_argument(const methodHandle& method, 380 const BasicType* sig_bt, 381 const VMRegPair* regs) NOT_DEBUG_RETURN; 382 383 // Ditto except for calling C 384 // 385 // C argument in register AND stack slot. 386 // Some architectures require that an argument must be passed in a register 387 // AND in a stack slot. These architectures provide a second VMRegPair array 388 // to be filled by the c_calling_convention method. On other architectures, 389 // NULL is being passed as the second VMRegPair array, so arguments are either 390 // passed in a register OR in a stack slot. 391 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2, 392 int total_args_passed); 393 394 static size_t trampoline_size(); 407 // location for the interpreter to record. This is used by the frame code 408 // to correct the sender code to match up with the stack pointer when the 409 // thread left the compiled code. In addition it allows the interpreter 410 // to remove the space the c2i adapter allocated to do its argument conversion. 411 412 // Although a c2i blob will always run interpreted even if compiled code is 413 // present if we see that compiled code is present the compiled call site 414 // will be patched/re-resolved so that later calls will run compiled. 415 416 // Additionally a c2i blob need to have a unverified entry because it can be reached 417 // in situations where the call site is an inlined cache site and may go megamorphic. 418 419 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed 420 // that the interpreter before it does any call dispatch will record the current 421 // stack pointer in the interpreter frame. On return it will restore the stack 422 // pointer as needed. This means the i2c adapter code doesn't need any special 423 // handshaking path with compiled code to keep the stack walking correct. 424 425 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm, 426 int comp_args_on_stack, 427 const GrowableArray<SigEntry>& sig_extended, 428 const VMRegPair *regs, 429 AdapterFingerPrint* fingerprint, 430 AdapterBlob*& new_adapter); 431 432 static void gen_i2c_adapter(MacroAssembler *_masm, 433 int comp_args_on_stack, 434 const GrowableArray<SigEntry>& sig_extended, 435 const VMRegPair *regs); 436 437 // OSR support 438 439 // OSR_migration_begin will extract the jvm state from an interpreter 440 // frame (locals, monitors) and store the data in a piece of C heap 441 // storage. This then allows the interpreter frame to be removed from the 442 // stack and the OSR nmethod to be called. That method is called with a 443 // pointer to the C heap storage. This pointer is the return value from 444 // OSR_migration_begin. 445 446 static intptr_t* OSR_migration_begin(JavaThread *thread); 447 448 // OSR_migration_end is a trivial routine. It is called after the compiled 449 // method has extracted the jvm state from the C heap that OSR_migration_begin 450 // created. It's entire job is to simply free this storage. 451 static void OSR_migration_end(intptr_t* buf); 452 453 // Convert a sig into a calling convention register layout 454 // and find interesting things about it. 623 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been 624 // setup. Compiled frames are fixed-size and the args are likely not in the 625 // right place. Hence all the args will likely be copied into the 626 // interpreter's frame, forcing that frame to grow. The compiled frame's 627 // outgoing stack args will be dead after the copy. 628 // 629 // Native wrappers, like adapters, marshal arguments. Unlike adapters they 630 // also perform an official frame push & pop. They have a call to the native 631 // routine in their middles and end in a return (instead of ending in a jump). 632 // The native wrappers are stored in real nmethods instead of the BufferBlobs 633 // used by the adapters. The code generation happens here because it's very 634 // similar to what the adapters have to do. 635 636 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> { 637 friend class AdapterHandlerTable; 638 639 private: 640 AdapterFingerPrint* _fingerprint; 641 address _i2c_entry; 642 address _c2i_entry; 643 address _c2i_unverified_entry; 644 Symbol* _sig_extended; 645 646 #ifdef ASSERT 647 // Captures code and signature used to generate this adapter when 648 // verifying adapter equivalence. 649 unsigned char* _saved_code; 650 int _saved_code_length; 651 #endif 652 653 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry, Symbol* sig_extended) { 654 _fingerprint = fingerprint; 655 _i2c_entry = i2c_entry; 656 _c2i_entry = c2i_entry; 657 _c2i_unverified_entry = c2i_unverified_entry; 658 _sig_extended = sig_extended; 659 #ifdef ASSERT 660 _saved_code = NULL; 661 _saved_code_length = 0; 662 #endif 663 } 664 665 void deallocate(); 666 667 // should never be used 668 AdapterHandlerEntry(); 669 670 public: 671 address get_i2c_entry() const { return _i2c_entry; } 672 address get_c2i_entry() const { return _c2i_entry; } 673 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } 674 Symbol* get_sig_extended() const { return _sig_extended; } 675 address base_address(); 676 void relocate(address new_base); 677 678 AdapterFingerPrint* fingerprint() const { return _fingerprint; } 679 680 AdapterHandlerEntry* next() { 681 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next(); 682 } 683 684 #ifdef ASSERT 685 // Used to verify that code generated for shared adapters is equivalent 686 void save_code (unsigned char* code, int length); 687 bool compare_code(unsigned char* code, int length); 688 #endif 689 690 //virtual void print_on(outputStream* st) const; DO NOT USE 691 void print_adapter_on(outputStream* st) const; 692 }; 693 694 // This class is used only with DumpSharedSpaces==true. It holds extra information 695 // that's used only during CDS dump time. 696 // For details, see comments around Method::link_method() 697 class CDSAdapterHandlerEntry: public AdapterHandlerEntry { 698 address _c2i_entry_trampoline; // allocated from shared spaces "MC" region 699 AdapterHandlerEntry** _adapter_trampoline; // allocated from shared spaces "MD" region 700 701 public: 702 address get_c2i_entry_trampoline() const { return _c2i_entry_trampoline; } 703 AdapterHandlerEntry** get_adapter_trampoline() const { return _adapter_trampoline; } 704 void init() NOT_CDS_RETURN; 705 }; 706 707 708 class AdapterHandlerLibrary: public AllStatic { 709 private: 710 static BufferBlob* _buffer; // the temporary code buffer in CodeCache 711 static AdapterHandlerTable* _adapters; 712 static AdapterHandlerEntry* _abstract_method_handler; 713 static BufferBlob* buffer_blob(); 714 static void initialize(); 715 static AdapterHandlerEntry* get_adapter0(const methodHandle& method, TRAPS); 716 717 public: 718 719 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, 720 address i2c_entry, address c2i_entry, address c2i_unverified_entry, 721 Symbol* sig_extended = NULL); 722 static void create_native_wrapper(const methodHandle& method); 723 static AdapterHandlerEntry* get_adapter(const methodHandle& method, TRAPS); 724 725 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); } 726 static void print_handler_on(outputStream* st, const CodeBlob* b); 727 static bool contains(const CodeBlob* b); 728 #ifndef PRODUCT 729 static void print_statistics(); 730 #endif // PRODUCT 731 732 }; 733 734 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP | 355 static address clean_static_call_entry(); 356 357 #if defined(X86) && defined(COMPILER1) 358 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available. 359 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result); 360 #endif // X86 && COMPILER1 361 362 public: 363 364 // Read the array of BasicTypes from a Java signature, and compute where 365 // compiled Java code would like to put the results. Values in reg_lo and 366 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are 367 // registers, those above refer to 4-byte stack slots. All stack slots are 368 // based off of the window top. SharedInfo::stack0 refers to the first usable 369 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word 370 // 4-bytes higher. So for sparc because the register window save area is at 371 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 372 // will be just above it. ( 373 // return value is the maximum number of VMReg stack slots the convention will use. 374 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing); 375 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) { 376 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length()); 377 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt); 378 return java_calling_convention(sig_bt, regs, total_args_passed, false); 379 } 380 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed); 381 static const uint java_return_convention_max_int; 382 static const uint java_return_convention_max_float; 383 384 static void check_member_name_argument_is_last_argument(const methodHandle& method, 385 const BasicType* sig_bt, 386 const VMRegPair* regs) NOT_DEBUG_RETURN; 387 388 // Ditto except for calling C 389 // 390 // C argument in register AND stack slot. 391 // Some architectures require that an argument must be passed in a register 392 // AND in a stack slot. These architectures provide a second VMRegPair array 393 // to be filled by the c_calling_convention method. On other architectures, 394 // NULL is being passed as the second VMRegPair array, so arguments are either 395 // passed in a register OR in a stack slot. 396 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2, 397 int total_args_passed); 398 399 static size_t trampoline_size(); 412 // location for the interpreter to record. This is used by the frame code 413 // to correct the sender code to match up with the stack pointer when the 414 // thread left the compiled code. In addition it allows the interpreter 415 // to remove the space the c2i adapter allocated to do its argument conversion. 416 417 // Although a c2i blob will always run interpreted even if compiled code is 418 // present if we see that compiled code is present the compiled call site 419 // will be patched/re-resolved so that later calls will run compiled. 420 421 // Additionally a c2i blob need to have a unverified entry because it can be reached 422 // in situations where the call site is an inlined cache site and may go megamorphic. 423 424 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed 425 // that the interpreter before it does any call dispatch will record the current 426 // stack pointer in the interpreter frame. On return it will restore the stack 427 // pointer as needed. This means the i2c adapter code doesn't need any special 428 // handshaking path with compiled code to keep the stack walking correct. 429 430 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm, 431 int comp_args_on_stack, 432 int comp_args_on_stack_cc, 433 const GrowableArray<SigEntry>* sig, 434 const VMRegPair* regs, 435 const GrowableArray<SigEntry>* sig_cc, 436 const VMRegPair* regs_cc, 437 AdapterFingerPrint* fingerprint, 438 AdapterBlob*& new_adapter); 439 440 static void gen_i2c_adapter(MacroAssembler *_masm, 441 int comp_args_on_stack, 442 const GrowableArray<SigEntry>* sig, 443 const VMRegPair *regs); 444 445 // OSR support 446 447 // OSR_migration_begin will extract the jvm state from an interpreter 448 // frame (locals, monitors) and store the data in a piece of C heap 449 // storage. This then allows the interpreter frame to be removed from the 450 // stack and the OSR nmethod to be called. That method is called with a 451 // pointer to the C heap storage. This pointer is the return value from 452 // OSR_migration_begin. 453 454 static intptr_t* OSR_migration_begin(JavaThread *thread); 455 456 // OSR_migration_end is a trivial routine. It is called after the compiled 457 // method has extracted the jvm state from the C heap that OSR_migration_begin 458 // created. It's entire job is to simply free this storage. 459 static void OSR_migration_end(intptr_t* buf); 460 461 // Convert a sig into a calling convention register layout 462 // and find interesting things about it. 631 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been 632 // setup. Compiled frames are fixed-size and the args are likely not in the 633 // right place. Hence all the args will likely be copied into the 634 // interpreter's frame, forcing that frame to grow. The compiled frame's 635 // outgoing stack args will be dead after the copy. 636 // 637 // Native wrappers, like adapters, marshal arguments. Unlike adapters they 638 // also perform an official frame push & pop. They have a call to the native 639 // routine in their middles and end in a return (instead of ending in a jump). 640 // The native wrappers are stored in real nmethods instead of the BufferBlobs 641 // used by the adapters. The code generation happens here because it's very 642 // similar to what the adapters have to do. 643 644 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> { 645 friend class AdapterHandlerTable; 646 647 private: 648 AdapterFingerPrint* _fingerprint; 649 address _i2c_entry; 650 address _c2i_entry; 651 address _c2i_value_entry; 652 address _c2i_unverified_entry; 653 654 // Support for scalarized value type calling convention 655 const GrowableArray<SigEntry>* _sig_cc; 656 SigEntry _res_sig_entry; 657 658 #ifdef ASSERT 659 // Captures code and signature used to generate this adapter when 660 // verifying adapter equivalence. 661 unsigned char* _saved_code; 662 int _saved_code_length; 663 #endif 664 665 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_value_entry, address c2i_unverified_entry) { 666 _fingerprint = fingerprint; 667 _i2c_entry = i2c_entry; 668 _c2i_entry = c2i_entry; 669 _c2i_value_entry = c2i_value_entry; 670 _c2i_unverified_entry = c2i_unverified_entry; 671 _sig_cc = NULL; 672 _res_sig_entry = SigEntry(); 673 #ifdef ASSERT 674 _saved_code = NULL; 675 _saved_code_length = 0; 676 #endif 677 } 678 679 void deallocate(); 680 681 // should never be used 682 AdapterHandlerEntry(); 683 684 public: 685 address get_i2c_entry() const { return _i2c_entry; } 686 address get_c2i_entry() const { return _c2i_entry; } 687 address get_c2i_value_entry() const { return _c2i_value_entry; } 688 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } 689 address base_address(); 690 void relocate(address new_base); 691 692 // Support for scalarized value type calling convention 693 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; } 694 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; } 695 void set_res_entry(SigEntry res_sig_entry) { _res_sig_entry = res_sig_entry; } 696 SigEntry get_res_entry() const { return _res_sig_entry; } 697 698 AdapterFingerPrint* fingerprint() const { return _fingerprint; } 699 700 AdapterHandlerEntry* next() { 701 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next(); 702 } 703 704 #ifdef ASSERT 705 // Used to verify that code generated for shared adapters is equivalent 706 void save_code (unsigned char* code, int length); 707 bool compare_code(unsigned char* code, int length); 708 #endif 709 710 //virtual void print_on(outputStream* st) const; DO NOT USE 711 void print_adapter_on(outputStream* st) const; 712 }; 713 714 // This class is used only with DumpSharedSpaces==true. It holds extra information 715 // that's used only during CDS dump time. 716 // For details, see comments around Method::link_method() 717 class CDSAdapterHandlerEntry: public AdapterHandlerEntry { 718 address _c2i_entry_trampoline; // allocated from shared spaces "MC" region 719 AdapterHandlerEntry** _adapter_trampoline; // allocated from shared spaces "MD" region 720 721 public: 722 address get_c2i_entry_trampoline() const { return _c2i_entry_trampoline; } 723 AdapterHandlerEntry** get_adapter_trampoline() const { return _adapter_trampoline; } 724 void init() NOT_CDS_RETURN; 725 }; 726 727 728 class AdapterHandlerLibrary: public AllStatic { 729 private: 730 static BufferBlob* _buffer; // the temporary code buffer in CodeCache 731 static AdapterHandlerTable* _adapters; 732 static AdapterHandlerEntry* _abstract_method_handler; 733 static BufferBlob* buffer_blob(); 734 static void initialize(); 735 static AdapterHandlerEntry* get_adapter0(const methodHandle& method); 736 737 public: 738 739 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, 740 address i2c_entry, address c2i_entry, address c2i_value_entry, address c2i_unverified_entry); 741 static void create_native_wrapper(const methodHandle& method); 742 static AdapterHandlerEntry* get_adapter(const methodHandle& method); 743 744 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); } 745 static void print_handler_on(outputStream* st, const CodeBlob* b); 746 static bool contains(const CodeBlob* b); 747 #ifndef PRODUCT 748 static void print_statistics(); 749 #endif // PRODUCT 750 751 }; 752 753 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP |