21 * have any questions.
22 *
23 */
24
25 // PcDescs map a physical PC (given as offset from start of nmethod) to
26 // the corresponding source scope and byte code index.
27
28 class nmethod;
29
30 class PcDesc VALUE_OBJ_CLASS_SPEC {
31 friend class VMStructs;
32 private:
33 int _pc_offset; // offset from start of nmethod
34 int _scope_decode_offset; // offset for scope in nmethod
35 int _obj_decode_offset;
36
37 union PcDescFlags {
38 int word;
39 struct {
40 unsigned int reexecute: 1;
41 } bits;
42 bool operator ==(const PcDescFlags& other) { return word == other.word; }
43 } _flags;
44
45 public:
46 int pc_offset() const { return _pc_offset; }
47 int scope_decode_offset() const { return _scope_decode_offset; }
48 int obj_decode_offset() const { return _obj_decode_offset; }
49
50 void set_pc_offset(int x) { _pc_offset = x; }
51 void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
52 void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
53
54 // Constructor (only used for static in nmethod.cpp)
55 // Also used by ScopeDesc::sender()]
56 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
57
58 enum {
59 // upper and lower exclusive limits real offsets:
60 lower_offset_limit = -1,
61 upper_offset_limit = (unsigned int)-1 >> 1
62 };
63
64 // Flags
65 bool should_reexecute() const { return _flags.bits.reexecute; }
66 void set_should_reexecute(bool z) { _flags.bits.reexecute = z; }
67
68 // Does pd refer to the same information as pd?
69 bool is_same_info(const PcDesc* pd) {
70 return _scope_decode_offset == pd->_scope_decode_offset &&
71 _obj_decode_offset == pd->_obj_decode_offset &&
72 _flags == pd->_flags;
73 }
74
75 // Returns the real pc
76 address real_pc(const nmethod* code) const;
77
78 void print(nmethod* code);
79 bool verify(nmethod* code);
80 };
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21 * have any questions.
22 *
23 */
24
25 // PcDescs map a physical PC (given as offset from start of nmethod) to
26 // the corresponding source scope and byte code index.
27
28 class nmethod;
29
30 class PcDesc VALUE_OBJ_CLASS_SPEC {
31 friend class VMStructs;
32 private:
33 int _pc_offset; // offset from start of nmethod
34 int _scope_decode_offset; // offset for scope in nmethod
35 int _obj_decode_offset;
36
37 union PcDescFlags {
38 int word;
39 struct {
40 unsigned int reexecute: 1;
41 unsigned int is_method_handle_invoke: 1;
42 } bits;
43 bool operator ==(const PcDescFlags& other) { return word == other.word; }
44 } _flags;
45
46 public:
47 int pc_offset() const { return _pc_offset; }
48 int scope_decode_offset() const { return _scope_decode_offset; }
49 int obj_decode_offset() const { return _obj_decode_offset; }
50
51 void set_pc_offset(int x) { _pc_offset = x; }
52 void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
53 void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
54
55 // Constructor (only used for static in nmethod.cpp)
56 // Also used by ScopeDesc::sender()]
57 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
58
59 enum {
60 // upper and lower exclusive limits real offsets:
61 lower_offset_limit = -1,
62 upper_offset_limit = (unsigned int)-1 >> 1
63 };
64
65 // Flags
66 bool should_reexecute() const { return _flags.bits.reexecute; }
67 void set_should_reexecute(bool z) { _flags.bits.reexecute = z; }
68
69 // Does pd refer to the same information as pd?
70 bool is_same_info(const PcDesc* pd) {
71 return _scope_decode_offset == pd->_scope_decode_offset &&
72 _obj_decode_offset == pd->_obj_decode_offset &&
73 _flags == pd->_flags;
74 }
75
76 bool is_method_handle_invoke() const { return _flags.bits.is_method_handle_invoke; }
77 void set_is_method_handle_invoke(bool z) { _flags.bits.is_method_handle_invoke = z; }
78
79 // Returns the real pc
80 address real_pc(const nmethod* code) const;
81
82 void print(nmethod* code);
83 bool verify(nmethod* code);
84 };
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