24
25 #ifndef SHARE_VM_CODE_SCOPEDESC_HPP
26 #define SHARE_VM_CODE_SCOPEDESC_HPP
27
28 #include "code/debugInfo.hpp"
29 #include "code/pcDesc.hpp"
30 #include "oops/method.hpp"
31 #include "utilities/growableArray.hpp"
32
33 // SimpleScopeDesc is used when all you need to extract from
34 // a given pc,nmethod pair is a Method* and a bci. This is
35 // quite a bit faster than allocating a full ScopeDesc, but
36 // very limited in abilities.
37
38 class SimpleScopeDesc : public StackObj {
39 private:
40 Method* _method;
41 int _bci;
42
43 public:
44 SimpleScopeDesc(nmethod* code,address pc) {
45 PcDesc* pc_desc = code->pc_desc_at(pc);
46 assert(pc_desc != NULL, "Must be able to find matching PcDesc");
47 DebugInfoReadStream buffer(code, pc_desc->scope_decode_offset());
48 int ignore_sender = buffer.read_int();
49 _method = buffer.read_method();
50 _bci = buffer.read_bci();
51 }
52
53 Method* method() { return _method; }
54 int bci() { return _bci; }
55 };
56
57 // ScopeDescs contain the information that makes source-level debugging of
58 // nmethods possible; each scopeDesc describes a method activation
59
60 class ScopeDesc : public ResourceObj {
61 public:
62 // Constructor
63 ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool return_oop);
64
65 // Calls above, giving default value of "serialized_null" to the
66 // "obj_decode_offset" argument. (We don't use a default argument to
67 // avoid a .hpp-.hpp dependency.)
68 ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool return_oop);
69
70 // JVM state
71 Method* method() const { return _method; }
72 int bci() const { return _bci; }
73 bool should_reexecute() const { return _reexecute; }
74 bool return_oop() const { return _return_oop; }
75
76 GrowableArray<ScopeValue*>* locals();
77 GrowableArray<ScopeValue*>* expressions();
78 GrowableArray<MonitorValue*>* monitors();
79 GrowableArray<ScopeValue*>* objects();
80
81 // Stack walking, returns NULL if this is the outer most scope.
82 ScopeDesc* sender() const;
83
84 // Returns where the scope was decoded
85 int decode_offset() const { return _decode_offset; }
86
87 // Tells whether sender() returns NULL
88 bool is_top() const;
89
90 private:
91 // Alternative constructor
92 ScopeDesc(const ScopeDesc* parent);
93
94 // JVM state
95 Method* _method;
96 int _bci;
97 bool _reexecute;
98 bool _return_oop;
99
100 // Decoding offsets
101 int _decode_offset;
102 int _sender_decode_offset;
103 int _locals_decode_offset;
104 int _expressions_decode_offset;
105 int _monitors_decode_offset;
106
107 // Object pool
108 GrowableArray<ScopeValue*>* _objects;
109
110 // Nmethod information
111 const nmethod* _code;
112
113 // Decoding operations
114 void decode_body();
115 GrowableArray<ScopeValue*>* decode_scope_values(int decode_offset);
116 GrowableArray<MonitorValue*>* decode_monitor_values(int decode_offset);
117 GrowableArray<ScopeValue*>* decode_object_values(int decode_offset);
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24
25 #ifndef SHARE_VM_CODE_SCOPEDESC_HPP
26 #define SHARE_VM_CODE_SCOPEDESC_HPP
27
28 #include "code/debugInfo.hpp"
29 #include "code/pcDesc.hpp"
30 #include "oops/method.hpp"
31 #include "utilities/growableArray.hpp"
32
33 // SimpleScopeDesc is used when all you need to extract from
34 // a given pc,nmethod pair is a Method* and a bci. This is
35 // quite a bit faster than allocating a full ScopeDesc, but
36 // very limited in abilities.
37
38 class SimpleScopeDesc : public StackObj {
39 private:
40 Method* _method;
41 int _bci;
42
43 public:
44 SimpleScopeDesc(nmethod* code, address pc) {
45 PcDesc* pc_desc = code->pc_desc_at(pc);
46 assert(pc_desc != NULL, "Must be able to find matching PcDesc");
47 DebugInfoReadStream buffer(code, pc_desc->scope_decode_offset());
48 int ignore_sender = buffer.read_int();
49 _method = buffer.read_method();
50 _bci = buffer.read_bci();
51 }
52
53 Method* method() { return _method; }
54 int bci() { return _bci; }
55 };
56
57 // ScopeDescs contain the information that makes source-level debugging of
58 // nmethods possible; each scopeDesc describes a method activation
59
60 class ScopeDesc : public ResourceObj {
61 public:
62 // Constructor
63 ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool rethrow_exception, bool return_oop);
64
65 // Calls above, giving default value of "serialized_null" to the
66 // "obj_decode_offset" argument. (We don't use a default argument to
67 // avoid a .hpp-.hpp dependency.)
68 ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool rethrow_exception, bool return_oop);
69
70 // JVM state
71 Method* method() const { return _method; }
72 int bci() const { return _bci; }
73 bool should_reexecute() const { return _reexecute; }
74 bool rethrow_exception() const { return _rethrow_exception; }
75 bool return_oop() const { return _return_oop; }
76
77 GrowableArray<ScopeValue*>* locals();
78 GrowableArray<ScopeValue*>* expressions();
79 GrowableArray<MonitorValue*>* monitors();
80 GrowableArray<ScopeValue*>* objects();
81
82 // Stack walking, returns NULL if this is the outer most scope.
83 ScopeDesc* sender() const;
84
85 // Returns where the scope was decoded
86 int decode_offset() const { return _decode_offset; }
87
88 // Tells whether sender() returns NULL
89 bool is_top() const;
90
91 private:
92 // Alternative constructor
93 ScopeDesc(const ScopeDesc* parent);
94
95 // JVM state
96 Method* _method;
97 int _bci;
98 bool _reexecute;
99 bool _rethrow_exception;
100 bool _return_oop;
101
102 // Decoding offsets
103 int _decode_offset;
104 int _sender_decode_offset;
105 int _locals_decode_offset;
106 int _expressions_decode_offset;
107 int _monitors_decode_offset;
108
109 // Object pool
110 GrowableArray<ScopeValue*>* _objects;
111
112 // Nmethod information
113 const nmethod* _code;
114
115 // Decoding operations
116 void decode_body();
117 GrowableArray<ScopeValue*>* decode_scope_values(int decode_offset);
118 GrowableArray<MonitorValue*>* decode_monitor_values(int decode_offset);
119 GrowableArray<ScopeValue*>* decode_object_values(int decode_offset);
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