src/cpu/sparc/vm/stubRoutines_sparc.hpp

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  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