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
11static 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 */
24struct debuginfo {
25	Dwarf		*dbg;
26	Dwfl_Module	*mod;
27	Dwfl		*dwfl;
28	Dwarf_Addr	bias;
29};
30
31extern struct debuginfo *debuginfo__new(const char *path);
32extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr);
33extern void debuginfo__delete(struct debuginfo *self);
34
35/* Find probe_trace_events specified by perf_probe_event from debuginfo */
36extern 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 */
42extern int debuginfo__find_probe_point(struct debuginfo *self,
43				       unsigned long addr,
44				       struct perf_probe_point *ppt);
45
46/* Find a line range */
47extern int debuginfo__find_line_range(struct debuginfo *self,
48				      struct line_range *lr);
49
50/* Find available variables */
51extern 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
56struct 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
79struct 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
87struct 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
97struct 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