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_PATH_LEN		 256
9#define MAX_PROBE_BUFFER	1024
10#define MAX_PROBES		 128
11
12static inline int is_c_varname(const char *name)
13{
14	/* TODO */
15	return isalpha(name[0]) || name[0] == '_';
16}
17
18#ifdef DWARF_SUPPORT
19/* Find probe_trace_events specified by perf_probe_event from debuginfo */
20extern int find_probe_trace_events(int fd, struct perf_probe_event *pev,
21				    struct probe_trace_event **tevs,
22				    int max_tevs);
23
24/* Find a perf_probe_point from debuginfo */
25extern int find_perf_probe_point(unsigned long addr,
26				 struct perf_probe_point *ppt);
27
28/* Find a line range */
29extern int find_line_range(int fd, struct line_range *lr);
30
31/* Find available variables */
32extern int find_available_vars_at(int fd, struct perf_probe_event *pev,
33				  struct variable_list **vls, int max_points,
34				  bool externs);
35
36/* ANDROID_CHANGE_BEGIN */
37#if 0
38#include <dwarf.h>
39#include <elfutils/libdw.h>
40#include <elfutils/libdwfl.h>
41#include <elfutils/version.h>
42#else
43/* These headers live under the external/elfutils */
44#include <dwarf.h>
45#include <libdw.h>
46#include <libdwfl.h>
47#include <version.h>
48#endif
49/* ANDROID_CHANGE_END */
50
51struct probe_finder {
52	struct perf_probe_event	*pev;		/* Target probe event */
53
54	/* Callback when a probe point is found */
55	int (*callback)(Dwarf_Die *sp_die, struct probe_finder *pf);
56
57	/* For function searching */
58	int			lno;		/* Line number */
59	Dwarf_Addr		addr;		/* Address */
60	const char		*fname;		/* Real file name */
61	Dwarf_Die		cu_die;		/* Current CU */
62	Dwarf_Die		sp_die;
63	struct list_head	lcache;		/* Line cache for lazy match */
64
65	/* For variable searching */
66#if _ELFUTILS_PREREQ(0, 142)
67	Dwarf_CFI		*cfi;		/* Call Frame Information */
68#endif
69	Dwarf_Op		*fb_ops;	/* Frame base attribute */
70	struct perf_probe_arg	*pvar;		/* Current target variable */
71	struct probe_trace_arg	*tvar;		/* Current result variable */
72};
73
74struct trace_event_finder {
75	struct probe_finder	pf;
76	struct probe_trace_event *tevs;		/* Found trace events */
77	int			ntevs;		/* Number of trace events */
78	int			max_tevs;	/* Max number of trace events */
79};
80
81struct available_var_finder {
82	struct probe_finder	pf;
83	struct variable_list	*vls;		/* Found variable lists */
84	int			nvls;		/* Number of variable lists */
85	int			max_vls;	/* Max no. of variable lists */
86	bool			externs;	/* Find external vars too */
87	bool			child;		/* Search child scopes */
88};
89
90struct line_finder {
91	struct line_range	*lr;		/* Target line range */
92
93	const char		*fname;		/* File name */
94	int			lno_s;		/* Start line number */
95	int			lno_e;		/* End line number */
96	Dwarf_Die		cu_die;		/* Current CU */
97	Dwarf_Die		sp_die;
98	int			found;
99};
100
101#endif /* DWARF_SUPPORT */
102
103#endif /*_PROBE_FINDER_H */
104