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