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src/hotspot/cpu/x86/stubGenerator_x86_64.hpp

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530   // Continuation point for throwing of implicit exceptions that are
531   // not handled in the current activation. Fabricates an exception
532   // oop and initiates normal exception dispatching in this
533   // frame. Since we need to preserve callee-saved values (currently
534   // only for C2, but done for C1 as well) we need a callee-saved oop
535   // map and therefore have to make these stubs into RuntimeStubs
536   // rather than BufferBlobs.  If the compiler needs all registers to
537   // be preserved between the fault point and the exception handler
538   // then it must assume responsibility for that in
539   // AbstractCompiler::continuation_for_implicit_null_exception or
540   // continuation_for_implicit_division_by_zero_exception. All other
541   // implicit exceptions (e.g., NullPointerException or
542   // AbstractMethodError on entry) are either at call sites or
543   // otherwise assume that stack unwinding will be initiated, so
544   // caller saved registers were assumed volatile in the compiler.
545   address generate_throw_exception(const char* name,
546                                    address runtime_entry,
547                                    Register arg1 = noreg,
548                                    Register arg2 = noreg);
549 



550   void create_control_words();
551 
552   // Initialization
553   void generate_initial_stubs();
554   void generate_continuation_stubs();
555   void generate_compiler_stubs();
556   void generate_final_stubs();
557 
558  public:
559   StubGenerator(CodeBuffer* code, StubsKind kind);
560 };
561 
562 #endif // CPU_X86_STUBGENERATOR_X86_64_HPP

530   // Continuation point for throwing of implicit exceptions that are
531   // not handled in the current activation. Fabricates an exception
532   // oop and initiates normal exception dispatching in this
533   // frame. Since we need to preserve callee-saved values (currently
534   // only for C2, but done for C1 as well) we need a callee-saved oop
535   // map and therefore have to make these stubs into RuntimeStubs
536   // rather than BufferBlobs.  If the compiler needs all registers to
537   // be preserved between the fault point and the exception handler
538   // then it must assume responsibility for that in
539   // AbstractCompiler::continuation_for_implicit_null_exception or
540   // continuation_for_implicit_division_by_zero_exception. All other
541   // implicit exceptions (e.g., NullPointerException or
542   // AbstractMethodError on entry) are either at call sites or
543   // otherwise assume that stack unwinding will be initiated, so
544   // caller saved registers were assumed volatile in the compiler.
545   address generate_throw_exception(const char* name,
546                                    address runtime_entry,
547                                    Register arg1 = noreg,
548                                    Register arg2 = noreg);
549 
550   // interpreter or compiled code marshalling registers to/from inline type instance
551   address generate_return_value_stub(address destination, const char* name, bool has_res);
552 
553   void create_control_words();
554 
555   // Initialization
556   void generate_initial_stubs();
557   void generate_continuation_stubs();
558   void generate_compiler_stubs();
559   void generate_final_stubs();
560 
561  public:
562   StubGenerator(CodeBuffer* code, StubsKind kind);
563 };
564 
565 #endif // CPU_X86_STUBGENERATOR_X86_64_HPP
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