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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#define MAX_PROBE_ARGS 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 HAVE_DWARF_SUPPORT
19
20#include "dwarf-aux.h"
21
22/* TODO: export debuginfo data structure even if no dwarf support */
23
24/* debug information structure */
25struct debuginfo {
26 Dwarf *dbg;
27 Dwfl_Module *mod;
28 Dwfl *dwfl;
29 Dwarf_Addr bias;
30};
31
32extern struct debuginfo *debuginfo__new(const char *path);
33extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr);
34extern void debuginfo__delete(struct debuginfo *dbg);
35
36/* Find probe_trace_events specified by perf_probe_event from debuginfo */
37extern int debuginfo__find_trace_events(struct debuginfo *dbg,
38 struct perf_probe_event *pev,
39 struct probe_trace_event **tevs,
40 int max_tevs);
41
42/* Find a perf_probe_point from debuginfo */
43extern int debuginfo__find_probe_point(struct debuginfo *dbg,
44 unsigned long addr,
45 struct perf_probe_point *ppt);
46
47/* Find a line range */
48extern int debuginfo__find_line_range(struct debuginfo *dbg,
49 struct line_range *lr);
50
51/* Find available variables */
52extern int debuginfo__find_available_vars_at(struct debuginfo *dbg,
53 struct perf_probe_event *pev,
54 struct variable_list **vls,
55 int max_points, bool externs);
56
57struct probe_finder {
58 struct perf_probe_event *pev; /* Target probe event */
59
60 /* Callback when a probe point is found */
61 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
62
63 /* For function searching */
64 int lno; /* Line number */
65 Dwarf_Addr addr; /* Address */
66 const char *fname; /* Real file name */
67 Dwarf_Die cu_die; /* Current CU */
68 Dwarf_Die sp_die;
69 struct list_head lcache; /* Line cache for lazy match */
70
71 /* For variable searching */
72#if _ELFUTILS_PREREQ(0, 142)
73 Dwarf_CFI *cfi; /* Call Frame Information */
74#endif
75 Dwarf_Op *fb_ops; /* Frame base attribute */
76 struct perf_probe_arg *pvar; /* Current target variable */
77 struct probe_trace_arg *tvar; /* Current result variable */
78};
79
80struct trace_event_finder {
81 struct probe_finder pf;
82 Dwfl_Module *mod; /* For solving symbols */
83 struct probe_trace_event *tevs; /* Found trace events */
84 int ntevs; /* Number of trace events */
85 int max_tevs; /* Max number of trace events */
86};
87
88struct available_var_finder {
89 struct probe_finder pf;
90 Dwfl_Module *mod; /* For solving symbols */
91 struct variable_list *vls; /* Found variable lists */
92 int nvls; /* Number of variable lists */
93 int max_vls; /* Max no. of variable lists */
94 bool externs; /* Find external vars too */
95 bool child; /* Search child scopes */
96};
97
98struct line_finder {
99 struct line_range *lr; /* Target line range */
100
101 const char *fname; /* File name */
102 int lno_s; /* Start line number */
103 int lno_e; /* End line number */
104 Dwarf_Die cu_die; /* Current CU */
105 Dwarf_Die sp_die;
106 int found;
107};
108
109#endif /* HAVE_DWARF_SUPPORT */
110
111#endif /*_PROBE_FINDER_H */