1 #ifndef _PROBE_FINDER_H
2 #define _PROBE_FINDER_H
3
4 #include <stdbool.h>
5 #include "util.h"
6 #include "intlist.h"
7 #include "probe-event.h"
8
9 #define MAX_PROBE_BUFFER 1024
10 #define MAX_PROBES 128
11 #define MAX_PROBE_ARGS 128
12
13 #define PROBE_ARG_VARS "$vars"
14 #define PROBE_ARG_PARAMS "$params"
15
is_c_varname(const char * name)16 static inline int is_c_varname(const char *name)
17 {
18 /* TODO */
19 return isalpha(name[0]) || name[0] == '_';
20 }
21
22 #ifdef HAVE_DWARF_SUPPORT
23
24 #include "dwarf-aux.h"
25
26 /* TODO: export debuginfo data structure even if no dwarf support */
27
28 /* debug information structure */
29 struct debuginfo {
30 Dwarf *dbg;
31 Dwfl_Module *mod;
32 Dwfl *dwfl;
33 Dwarf_Addr bias;
34 };
35
36 /* This also tries to open distro debuginfo */
37 extern struct debuginfo *debuginfo__new(const char *path);
38 extern void debuginfo__delete(struct debuginfo *dbg);
39
40 /* Find probe_trace_events specified by perf_probe_event from debuginfo */
41 extern int debuginfo__find_trace_events(struct debuginfo *dbg,
42 struct perf_probe_event *pev,
43 struct probe_trace_event **tevs);
44
45 /* Find a perf_probe_point from debuginfo */
46 extern int debuginfo__find_probe_point(struct debuginfo *dbg,
47 unsigned long addr,
48 struct perf_probe_point *ppt);
49
50 /* Find a line range */
51 extern int debuginfo__find_line_range(struct debuginfo *dbg,
52 struct line_range *lr);
53
54 /* Find available variables */
55 extern int debuginfo__find_available_vars_at(struct debuginfo *dbg,
56 struct perf_probe_event *pev,
57 struct variable_list **vls);
58
59 /* Find a src file from a DWARF tag path */
60 int get_real_path(const char *raw_path, const char *comp_dir,
61 char **new_path);
62
63 struct probe_finder {
64 struct perf_probe_event *pev; /* Target probe event */
65
66 /* Callback when a probe point is found */
67 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
68
69 /* For function searching */
70 int lno; /* Line number */
71 Dwarf_Addr addr; /* Address */
72 const char *fname; /* Real file name */
73 Dwarf_Die cu_die; /* Current CU */
74 Dwarf_Die sp_die;
75 struct intlist *lcache; /* Line cache for lazy match */
76
77 /* For variable searching */
78 #if _ELFUTILS_PREREQ(0, 142)
79 Dwarf_CFI *cfi; /* Call Frame Information */
80 #endif
81 Dwarf_Op *fb_ops; /* Frame base attribute */
82 struct perf_probe_arg *pvar; /* Current target variable */
83 struct probe_trace_arg *tvar; /* Current result variable */
84 };
85
86 struct trace_event_finder {
87 struct probe_finder pf;
88 Dwfl_Module *mod; /* For solving symbols */
89 struct probe_trace_event *tevs; /* Found trace events */
90 int ntevs; /* Number of trace events */
91 int max_tevs; /* Max number of trace events */
92 };
93
94 struct available_var_finder {
95 struct probe_finder pf;
96 Dwfl_Module *mod; /* For solving symbols */
97 struct variable_list *vls; /* Found variable lists */
98 int nvls; /* Number of variable lists */
99 int max_vls; /* Max no. of variable lists */
100 bool child; /* Search child scopes */
101 };
102
103 struct line_finder {
104 struct line_range *lr; /* Target line range */
105
106 const char *fname; /* File name */
107 int lno_s; /* Start line number */
108 int lno_e; /* End line number */
109 Dwarf_Die cu_die; /* Current CU */
110 Dwarf_Die sp_die;
111 int found;
112 };
113
114 #endif /* HAVE_DWARF_SUPPORT */
115
116 #endif /*_PROBE_FINDER_H */
117