61 |
61 |
62 static const Register& Lstub_temp = L2; |
62 static const Register& Lstub_temp = L2; |
63 |
63 |
64 // ------------------------------------------------------------------------------------------------------------------------- |
64 // ------------------------------------------------------------------------------------------------------------------------- |
65 // Stub Code definitions |
65 // Stub Code definitions |
66 |
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67 static address handle_unsafe_access() { |
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68 JavaThread* thread = JavaThread::current(); |
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69 address pc = thread->saved_exception_pc(); |
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70 address npc = thread->saved_exception_npc(); |
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71 // pc is the instruction which we must emulate |
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72 // doing a no-op is fine: return garbage from the load |
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73 |
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74 // request an async exception |
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75 thread->set_pending_unsafe_access_error(); |
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76 |
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77 // return address of next instruction to execute |
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78 return npc; |
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79 } |
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80 |
66 |
81 class StubGenerator: public StubCodeGenerator { |
67 class StubGenerator: public StubCodeGenerator { |
82 private: |
68 private: |
83 |
69 |
84 #ifdef PRODUCT |
70 #ifdef PRODUCT |
742 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 |
728 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 |
743 |
729 |
744 return start; |
730 return start; |
745 } |
731 } |
746 Label _atomic_add_stub; // called from other stubs |
732 Label _atomic_add_stub; // called from other stubs |
747 |
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748 |
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749 //------------------------------------------------------------------------------------------------------------------------ |
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750 // The following routine generates a subroutine to throw an asynchronous |
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751 // UnknownError when an unsafe access gets a fault that could not be |
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752 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) |
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753 // |
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754 // Arguments : |
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755 // |
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756 // trapping PC: O7 |
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757 // |
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758 // Results: |
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759 // posts an asynchronous exception, skips the trapping instruction |
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760 // |
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761 |
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762 address generate_handler_for_unsafe_access() { |
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763 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); |
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764 address start = __ pc(); |
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765 |
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766 const int preserve_register_words = (64 * 2); |
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767 Address preserve_addr(FP, (-preserve_register_words * wordSize) + STACK_BIAS); |
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768 |
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769 Register Lthread = L7_thread_cache; |
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770 int i; |
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771 |
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772 __ save_frame(0); |
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773 __ mov(G1, L1); |
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774 __ mov(G2, L2); |
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775 __ mov(G3, L3); |
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776 __ mov(G4, L4); |
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777 __ mov(G5, L5); |
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778 for (i = 0; i < 64; i += 2) { |
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779 __ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize); |
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780 } |
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781 |
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782 address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access); |
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783 BLOCK_COMMENT("call handle_unsafe_access"); |
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784 __ call(entry_point, relocInfo::runtime_call_type); |
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785 __ delayed()->nop(); |
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786 |
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787 __ mov(L1, G1); |
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788 __ mov(L2, G2); |
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789 __ mov(L3, G3); |
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790 __ mov(L4, G4); |
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791 __ mov(L5, G5); |
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792 for (i = 0; i < 64; i += 2) { |
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793 __ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize); |
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794 } |
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795 |
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796 __ verify_thread(); |
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797 |
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798 __ jmp(O0, 0); |
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799 __ delayed()->restore(); |
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800 |
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801 return start; |
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802 } |
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803 |
733 |
804 |
734 |
805 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); |
735 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); |
806 // Arguments : |
736 // Arguments : |
807 // |
737 // |
5216 // These entry points require SharedInfo::stack0 to be set up in non-core builds |
5146 // These entry points require SharedInfo::stack0 to be set up in non-core builds |
5217 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError)); |
5147 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError)); |
5218 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError)); |
5148 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError)); |
5219 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call)); |
5149 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call)); |
5220 |
5150 |
5221 StubRoutines::_handler_for_unsafe_access_entry = |
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5222 generate_handler_for_unsafe_access(); |
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5223 |
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5224 // support for verify_oop (must happen after universe_init) |
5151 // support for verify_oop (must happen after universe_init) |
5225 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); |
5152 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); |
5226 |
5153 |
5227 // arraycopy stubs used by compilers |
5154 // arraycopy stubs used by compilers |
5228 generate_arraycopy_stubs(); |
5155 generate_arraycopy_stubs(); |