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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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 *dwfl;
27 Dwarf_Addr bias;
28};
29
30extern struct debuginfo *debuginfo__new(const char *path);
31extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr);
32extern void debuginfo__delete(struct debuginfo *self);
33
34/* Find probe_trace_events specified by perf_probe_event from debuginfo */
35extern int debuginfo__find_trace_events(struct debuginfo *self,
36 struct perf_probe_event *pev,
37 struct probe_trace_event **tevs,
38 int max_tevs);
39
40/* Find a perf_probe_point from debuginfo */
41extern int debuginfo__find_probe_point(struct debuginfo *self,
42 unsigned long addr,
43 struct perf_probe_point *ppt);
44
45/* Find a line range */
46extern int debuginfo__find_line_range(struct debuginfo *self,
47 struct line_range *lr);
48
49/* Find available variables */
50extern int debuginfo__find_available_vars_at(struct debuginfo *self,
51 struct perf_probe_event *pev,
52 struct variable_list **vls,
53 int max_points, bool externs);
54
55struct probe_finder {
56 struct perf_probe_event *pev; /* Target probe event */
57
58 /* Callback when a probe point is found */
59 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
60
61 /* For function searching */
62 int lno; /* Line number */
63 Dwarf_Addr addr; /* Address */
64 const char *fname; /* Real file name */
65 Dwarf_Die cu_die; /* Current CU */
66 Dwarf_Die sp_die;
67 struct list_head lcache; /* Line cache for lazy match */
68
69 /* For variable searching */
70#if _ELFUTILS_PREREQ(0, 142)
71 Dwarf_CFI *cfi; /* Call Frame Information */
72#endif
73 Dwarf_Op *fb_ops; /* Frame base attribute */
74 struct perf_probe_arg *pvar; /* Current target variable */
75 struct probe_trace_arg *tvar; /* Current result variable */
76};
77
78struct trace_event_finder {
79 struct probe_finder pf;
80 struct probe_trace_event *tevs; /* Found trace events */
81 int ntevs; /* Number of trace events */
82 int max_tevs; /* Max number of trace events */
83};
84
85struct available_var_finder {
86 struct probe_finder pf;
87 struct variable_list *vls; /* Found variable lists */
88 int nvls; /* Number of variable lists */
89 int max_vls; /* Max no. of variable lists */
90 bool externs; /* Find external vars too */
91 bool child; /* Search child scopes */
92};
93
94struct line_finder {
95 struct line_range *lr; /* Target line range */
96
97 const char *fname; /* File name */
98 int lno_s; /* Start line number */
99 int lno_e; /* End line number */
100 Dwarf_Die cu_die; /* Current CU */
101 Dwarf_Die sp_die;
102 int found;
103};
104
105#endif /* DWARF_SUPPORT */
106
107#endif /*_PROBE_FINDER_H */