583 // setup. Compiled frames are fixed-size and the args are likely not in the
584 // right place. Hence all the args will likely be copied into the
585 // interpreter's frame, forcing that frame to grow. The compiled frame's
586 // outgoing stack args will be dead after the copy.
587 //
588 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
589 // also perform an offical frame push & pop. They have a call to the native
590 // routine in their middles and end in a return (instead of ending in a jump).
591 // The native wrappers are stored in real nmethods instead of the BufferBlobs
592 // used by the adapters. The code generation happens here because it's very
593 // similar to what the adapters have to do.
594
595 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
596 friend class AdapterHandlerTable;
597
598 private:
599 AdapterFingerPrint* _fingerprint;
600 address _i2c_entry;
601 address _c2i_entry;
602 address _c2i_unverified_entry;
603
604 #ifdef ASSERT
605 // Captures code and signature used to generate this adapter when
606 // verifing adapter equivalence.
607 unsigned char* _saved_code;
608 int _code_length;
609 BasicType* _saved_sig;
610 int _total_args_passed;
611 #endif
612
613 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
614 _fingerprint = fingerprint;
615 _i2c_entry = i2c_entry;
616 _c2i_entry = c2i_entry;
617 _c2i_unverified_entry = c2i_unverified_entry;
618 #ifdef ASSERT
619 _saved_code = NULL;
620 _code_length = 0;
621 _saved_sig = NULL;
622 _total_args_passed = 0;
623 #endif
624 }
625
626 void deallocate();
627
628 // should never be used
629 AdapterHandlerEntry();
630
631 public:
632 address get_i2c_entry() const { return _i2c_entry; }
633 address get_c2i_entry() const { return _c2i_entry; }
634 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
635
636 address base_address();
637 void relocate(address new_base);
638
639 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
640
641 AdapterHandlerEntry* next() {
642 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
643 }
644
645 #ifdef ASSERT
646 // Used to verify that code generated for shared adapters is equivalent
647 void save_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt);
648 bool compare_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt);
649 #endif
650
651 //virtual void print_on(outputStream* st) const; DO NOT USE
652 void print_adapter_on(outputStream* st) const;
653 };
654
655 class AdapterHandlerLibrary: public AllStatic {
656 private:
657 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
658 static AdapterHandlerTable* _adapters;
659 static AdapterHandlerEntry* _abstract_method_handler;
660 static BufferBlob* buffer_blob();
661 static void initialize();
662
663 public:
664
665 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
666 address i2c_entry, address c2i_entry, address c2i_unverified_entry);
667 static nmethod* create_native_wrapper(methodHandle method, int compile_id);
668 static AdapterHandlerEntry* get_adapter(methodHandle method);
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583 // setup. Compiled frames are fixed-size and the args are likely not in the
584 // right place. Hence all the args will likely be copied into the
585 // interpreter's frame, forcing that frame to grow. The compiled frame's
586 // outgoing stack args will be dead after the copy.
587 //
588 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
589 // also perform an offical frame push & pop. They have a call to the native
590 // routine in their middles and end in a return (instead of ending in a jump).
591 // The native wrappers are stored in real nmethods instead of the BufferBlobs
592 // used by the adapters. The code generation happens here because it's very
593 // similar to what the adapters have to do.
594
595 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
596 friend class AdapterHandlerTable;
597
598 private:
599 AdapterFingerPrint* _fingerprint;
600 address _i2c_entry;
601 address _c2i_entry;
602 address _c2i_unverified_entry;
603 bool _contains_all_checks;
604
605 #ifdef ASSERT
606 // Captures code and signature used to generate this adapter when
607 // verifing adapter equivalence.
608 unsigned char* _saved_code;
609 int _saved_code_length;
610 #endif
611
612 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
613 _fingerprint = fingerprint;
614 _i2c_entry = i2c_entry;
615 _c2i_entry = c2i_entry;
616 _c2i_unverified_entry = c2i_unverified_entry;
617 _contains_all_checks = false;
618 #ifdef ASSERT
619 _saved_code = NULL;
620 _saved_code_length = 0;
621 #endif
622 }
623
624 void deallocate();
625
626 // should never be used
627 AdapterHandlerEntry();
628
629 public:
630 address get_i2c_entry() const { return _i2c_entry; }
631 address get_c2i_entry() const { return _c2i_entry; }
632 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
633 void set_contains_all_checks(bool val){ _contains_all_checks = val; }
634 bool contains_all_checks() { return _contains_all_checks; }
635
636 address base_address();
637 void relocate(address new_base);
638
639 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
640
641 AdapterHandlerEntry* next() {
642 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
643 }
644
645 #ifdef ASSERT
646 // Used to verify that code generated for shared adapters is equivalent
647 void save_code (unsigned char* code, int length);
648 bool compare_code(unsigned char* code, int length);
649 #endif
650
651 //virtual void print_on(outputStream* st) const; DO NOT USE
652 void print_adapter_on(outputStream* st) const;
653 };
654
655 class AdapterHandlerLibrary: public AllStatic {
656 private:
657 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
658 static AdapterHandlerTable* _adapters;
659 static AdapterHandlerEntry* _abstract_method_handler;
660 static BufferBlob* buffer_blob();
661 static void initialize();
662
663 public:
664
665 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
666 address i2c_entry, address c2i_entry, address c2i_unverified_entry);
667 static nmethod* create_native_wrapper(methodHandle method, int compile_id);
668 static AdapterHandlerEntry* get_adapter(methodHandle method);
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