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24 
25 #ifndef CPU_ARM_FRAME_ARM_HPP
26 #define CPU_ARM_FRAME_ARM_HPP
27 
28 #include "runtime/synchronizer.hpp"
29 
30  public:
31   enum {
32     pc_return_offset                                 =  0,
33     // All frames
34     link_offset                                      =  0,
35     return_addr_offset                               =  1,
36     // non-interpreter frames
37     sender_sp_offset                                 =  2,
38 
39     // Interpreter frames
40     interpreter_frame_oop_temp_offset                =  2, // for native calls only
41 
42     interpreter_frame_sender_sp_offset               = -1,
43     // outgoing sp before a call to an invoked method
44     interpreter_frame_last_sp_offset                 = interpreter_frame_sender_sp_offset - 1,
45     interpreter_frame_method_offset                  = interpreter_frame_last_sp_offset - 1,
46     interpreter_frame_mirror_offset                  = interpreter_frame_method_offset - 1,
47     interpreter_frame_mdp_offset                     = interpreter_frame_mirror_offset - 1,
48     interpreter_frame_cache_offset                   = interpreter_frame_mdp_offset - 1,
49     interpreter_frame_locals_offset                  = interpreter_frame_cache_offset - 1,
50     interpreter_frame_bcp_offset                     = interpreter_frame_locals_offset - 1,
51     interpreter_frame_initial_sp_offset              = interpreter_frame_bcp_offset - 1,
52 
53     interpreter_frame_monitor_block_top_offset       = interpreter_frame_initial_sp_offset,
54     interpreter_frame_monitor_block_bottom_offset    = interpreter_frame_initial_sp_offset,
55 
56     // Entry frames
57     entry_frame_call_wrapper_offset                  =  0
58   };
59 
ptr_at(int offset) const60   intptr_t ptr_at(int offset) const {
61     return *ptr_at_addr(offset);
62   }
63 
ptr_at_put(int offset,intptr_t value)64   void ptr_at_put(int offset, intptr_t value) {
65     *ptr_at_addr(offset) = value;
66   }
67 
68  private:
69   // an additional field beyond _sp and _pc:
70   intptr_t* _fp; // frame pointer
71   // The interpreter and adapters will extend the frame of the caller.
72   // Since oopMaps are based on the sp of the caller before extension
73   // we need to know that value. However in order to compute the address
74   // of the return address we need the real "raw" sp. By convention we
75   // use sp() to mean "raw" sp and unextended_sp() to mean the caller's
76   // original sp.
77 
78   intptr_t* _unextended_sp;
79   void adjust_unextended_sp();
80 
ptr_at_addr(int offset) const81   intptr_t* ptr_at_addr(int offset) const {
82     return (intptr_t*) addr_at(offset);
83   }
84 
85 #ifdef ASSERT
86   // Used in frame::sender_for_{interpreter,compiled}_frame
87   static void verify_deopt_original_pc(   CompiledMethod* nm, intptr_t* unextended_sp, bool is_method_handle_return = false);
verify_deopt_mh_original_pc(CompiledMethod * nm,intptr_t * unextended_sp)88   static void verify_deopt_mh_original_pc(CompiledMethod* nm, intptr_t* unextended_sp) {
89     verify_deopt_original_pc(nm, unextended_sp, true);
90   }
91 #endif
92 
93  public:
94   // Constructors
95 
96   frame(intptr_t* sp, intptr_t* fp, address pc);
97 
98   frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc);
99 
100   frame(intptr_t* sp, intptr_t* fp);
101 
102   void init(intptr_t* sp, intptr_t* fp, address pc);
103 
104   // accessors for the instance variables
105   // Note: not necessarily the real 'frame pointer' (see real_fp)
fp() const106   intptr_t* fp() const { return _fp; }
107 
108   inline address* sender_pc_addr() const;
109 
110   // expression stack tos if we are nested in a java call
111   intptr_t* interpreter_frame_last_sp() const;
112 
113   // deoptimization support
114   void interpreter_frame_set_last_sp(intptr_t* sp);
115 
116   // helper to update a map with callee-saved FP
117   static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr);
118 
interpreter_frame_expression_stack_direction()119   static jint interpreter_frame_expression_stack_direction() { return -1; }
120 
121 #endif // CPU_ARM_FRAME_ARM_HPP
122