30 // extend it. 31 32 33 // So unfortunately c2 will call with a pc from a frame object 34 // (already adjusted) and a raw pc (unadjusted), so we need to check both. 35 // It didn't use to be like this before adapter removal. 36 static bool returns_to_call_stub(address return_pc) { 37 return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) || 38 (return_pc == _call_stub_return_address ); 39 } 40 41 enum /* platform_dependent_constants */ { 42 // %%%%%%%% May be able to shrink this a lot 43 code_size1 = 20000, // simply increase if too small (assembler will crash if too small) 44 code_size2 = 20000 // simply increase if too small (assembler will crash if too small) 45 }; 46 47 class Sparc { 48 friend class StubGenerator; 49 50 public: 51 enum { nof_instance_allocators = 10 }; 52 53 // allocator lock values 54 enum { 55 unlocked = 0, 56 locked = 1 57 }; 58 59 enum { 60 v8_oop_lock_ignore_bits = 2, 61 v8_oop_lock_bits = 4, 62 nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits), 63 v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits), 64 v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits 65 }; 66 67 static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries]; 68 69 private: 70 static address _test_stop_entry; 71 static address _stop_subroutine_entry; 72 static address _flush_callers_register_windows_entry; 73 74 static int _atomic_memory_operation_lock; 75 76 static address _partial_subtype_check; 77 78 public: 79 // %%% global lock for everyone who needs to use atomic_compare_and_exchange 80 // %%% or atomic_increment -- should probably use more locks for more 81 // %%% scalability-- for instance one for each eden space or group of 82 83 // address of the lock for atomic_compare_and_exchange 84 static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; } 85 86 // accessor and mutator for _atomic_memory_operation_lock 87 static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; } 88 static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; } 89 90 // test assembler stop routine by setting registers 91 static void (*test_stop_entry()) () { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); } 92 93 // a subroutine for debugging assembler code 94 static address stop_subroutine_entry_address() { return (address)&_stop_subroutine_entry; } 95 96 // flushes (all but current) register window 97 static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); } 98 99 static address partial_subtype_check() { return _partial_subtype_check; } 100 }; 101 102 #endif // CPU_SPARC_VM_STUBROUTINES_SPARC_HPP | 30 // extend it. 31 32 33 // So unfortunately c2 will call with a pc from a frame object 34 // (already adjusted) and a raw pc (unadjusted), so we need to check both. 35 // It didn't use to be like this before adapter removal. 36 static bool returns_to_call_stub(address return_pc) { 37 return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) || 38 (return_pc == _call_stub_return_address ); 39 } 40 41 enum /* platform_dependent_constants */ { 42 // %%%%%%%% May be able to shrink this a lot 43 code_size1 = 20000, // simply increase if too small (assembler will crash if too small) 44 code_size2 = 20000 // simply increase if too small (assembler will crash if too small) 45 }; 46 47 class Sparc { 48 friend class StubGenerator; 49 50 private: 51 static address _test_stop_entry; 52 static address _stop_subroutine_entry; 53 static address _flush_callers_register_windows_entry; 54 55 static address _partial_subtype_check; 56 57 public: 58 // test assembler stop routine by setting registers 59 static void (*test_stop_entry()) () { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); } 60 61 // a subroutine for debugging assembler code 62 static address stop_subroutine_entry_address() { return (address)&_stop_subroutine_entry; } 63 64 // flushes (all but current) register window 65 static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); } 66 67 static address partial_subtype_check() { return _partial_subtype_check; } 68 }; 69 70 #endif // CPU_SPARC_VM_STUBROUTINES_SPARC_HPP |