1 #ifndef _PROBE_FINDER_H
2 #define _PROBE_FINDER_H
3
4 #include <stdbool.h>
5 #include "util.h"
6 #include "probe-event.h"
7
8 #define MAX_PROBE_BUFFER 1024
9 #define MAX_PROBES 128
10
is_c_varname(const char * name)11 static inline int is_c_varname(const char *name)
12 {
13 /* TODO */
14 return isalpha(name[0]) || name[0] == '_';
15 }
16
17 #ifdef DWARF_SUPPORT
18
19 #include "dwarf-aux.h"
20
21 /* TODO: export debuginfo data structure even if no dwarf support */
22
23 /* debug information structure */
24 struct debuginfo {
25 Dwarf *dbg;
26 Dwfl_Module *mod;
27 Dwfl *dwfl;
28 Dwarf_Addr bias;
29 };
30
31 extern struct debuginfo *debuginfo__new(const char *path);
32 extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr);
33 extern void debuginfo__delete(struct debuginfo *self);
34
35 /* Find probe_trace_events specified by perf_probe_event from debuginfo */
36 extern int debuginfo__find_trace_events(struct debuginfo *self,
37 struct perf_probe_event *pev,
38 struct probe_trace_event **tevs,
39 int max_tevs);
40
41 /* Find a perf_probe_point from debuginfo */
42 extern int debuginfo__find_probe_point(struct debuginfo *self,
43 unsigned long addr,
44 struct perf_probe_point *ppt);
45
46 /* Find a line range */
47 extern int debuginfo__find_line_range(struct debuginfo *self,
48 struct line_range *lr);
49
50 /* Find available variables */
51 extern int debuginfo__find_available_vars_at(struct debuginfo *self,
52 struct perf_probe_event *pev,
53 struct variable_list **vls,
54 int max_points, bool externs);
55
56 struct probe_finder {
57 struct perf_probe_event *pev; /* Target probe event */
58
59 /* Callback when a probe point is found */
60 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
61
62 /* For function searching */
63 int lno; /* Line number */
64 Dwarf_Addr addr; /* Address */
65 const char *fname; /* Real file name */
66 Dwarf_Die cu_die; /* Current CU */
67 Dwarf_Die sp_die;
68 struct list_head lcache; /* Line cache for lazy match */
69
70 /* For variable searching */
71 #if _ELFUTILS_PREREQ(0, 142)
72 Dwarf_CFI *cfi; /* Call Frame Information */
73 #endif
74 Dwarf_Op *fb_ops; /* Frame base attribute */
75 struct perf_probe_arg *pvar; /* Current target variable */
76 struct probe_trace_arg *tvar; /* Current result variable */
77 };
78
79 struct trace_event_finder {
80 struct probe_finder pf;
81 Dwfl_Module *mod; /* For solving symbols */
82 struct probe_trace_event *tevs; /* Found trace events */
83 int ntevs; /* Number of trace events */
84 int max_tevs; /* Max number of trace events */
85 };
86
87 struct available_var_finder {
88 struct probe_finder pf;
89 Dwfl_Module *mod; /* For solving symbols */
90 struct variable_list *vls; /* Found variable lists */
91 int nvls; /* Number of variable lists */
92 int max_vls; /* Max no. of variable lists */
93 bool externs; /* Find external vars too */
94 bool child; /* Search child scopes */
95 };
96
97 struct line_finder {
98 struct line_range *lr; /* Target line range */
99
100 const char *fname; /* File name */
101 int lno_s; /* Start line number */
102 int lno_e; /* End line number */
103 Dwarf_Die cu_die; /* Current CU */
104 Dwarf_Die sp_die;
105 int found;
106 };
107
108 #endif /* DWARF_SUPPORT */
109
110 #endif /*_PROBE_FINDER_H */
111