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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _PROBE_FINDER_H
3#define _PROBE_FINDER_H
4
5#include <stdbool.h>
6#include "intlist.h"
7#include "build-id.h"
8#include "probe-event.h"
9#include <linux/ctype.h>
10
11#define MAX_PROBE_BUFFER 1024
12#define MAX_PROBES 128
13#define MAX_PROBE_ARGS 128
14
15#define PROBE_ARG_VARS "$vars"
16#define PROBE_ARG_PARAMS "$params"
17
18static inline int is_c_varname(const char *name)
19{
20 /* TODO */
21 return isalpha(name[0]) || name[0] == '_';
22}
23
24#ifdef HAVE_DWARF_SUPPORT
25
26#include "dwarf-aux.h"
27#include "debuginfo.h"
28
29/* Find probe_trace_events specified by perf_probe_event from debuginfo */
30int debuginfo__find_trace_events(struct debuginfo *dbg,
31 struct perf_probe_event *pev,
32 struct probe_trace_event **tevs);
33
34/* Find a perf_probe_point from debuginfo */
35int debuginfo__find_probe_point(struct debuginfo *dbg, u64 addr,
36 struct perf_probe_point *ppt);
37
38/* Find a line range */
39int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr);
40
41/* Find available variables */
42int debuginfo__find_available_vars_at(struct debuginfo *dbg,
43 struct perf_probe_event *pev,
44 struct variable_list **vls);
45
46/* Find a src file from a DWARF tag path */
47int find_source_path(const char *raw_path, const char *sbuild_id,
48 const char *comp_dir, char **new_path);
49
50struct probe_finder {
51 struct perf_probe_event *pev; /* Target probe event */
52 struct debuginfo *dbg;
53
54 /* Callback when a probe point is found */
55 int (*callback)(Dwarf_Die *sc_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 intlist *lcache; /* Line cache for lazy match */
64
65 /* For variable searching */
66#if _ELFUTILS_PREREQ(0, 142)
67 /* Call Frame Information from .eh_frame */
68 Dwarf_CFI *cfi_eh;
69 /* Call Frame Information from .debug_frame */
70 Dwarf_CFI *cfi_dbg;
71#endif
72 Dwarf_Op *fb_ops; /* Frame base attribute */
73 unsigned int machine; /* Target machine arch */
74 struct perf_probe_arg *pvar; /* Current target variable */
75 struct probe_trace_arg *tvar; /* Current result variable */
76 bool skip_empty_arg; /* Skip non-exist args */
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 child; /* Search child scopes */
94};
95
96struct line_finder {
97 struct line_range *lr; /* Target line range */
98
99 const char *fname; /* File name */
100 int lno_s; /* Start line number */
101 int lno_e; /* End line number */
102 Dwarf_Die cu_die; /* Current CU */
103 Dwarf_Die sp_die;
104 int found;
105};
106
107#endif /* HAVE_DWARF_SUPPORT */
108
109#endif /*_PROBE_FINDER_H */
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
13#define PROBE_ARG_VARS "$vars"
14#define PROBE_ARG_PARAMS "$params"
15
16static inline int is_c_varname(const char *name)
17{
18 /* TODO */
19 return isalpha(name[0]) || name[0] == '_';
20}
21
22#ifdef HAVE_DWARF_SUPPORT
23
24#include "dwarf-aux.h"
25
26/* TODO: export debuginfo data structure even if no dwarf support */
27
28/* debug information structure */
29struct debuginfo {
30 Dwarf *dbg;
31 Dwfl_Module *mod;
32 Dwfl *dwfl;
33 Dwarf_Addr bias;
34};
35
36/* This also tries to open distro debuginfo */
37struct debuginfo *debuginfo__new(const char *path);
38void debuginfo__delete(struct debuginfo *dbg);
39
40/* Find probe_trace_events specified by perf_probe_event from debuginfo */
41int debuginfo__find_trace_events(struct debuginfo *dbg,
42 struct perf_probe_event *pev,
43 struct probe_trace_event **tevs);
44
45/* Find a perf_probe_point from debuginfo */
46int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr,
47 struct perf_probe_point *ppt);
48
49/* Find a line range */
50int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr);
51
52/* Find available variables */
53int debuginfo__find_available_vars_at(struct debuginfo *dbg,
54 struct perf_probe_event *pev,
55 struct variable_list **vls);
56
57/* Find a src file from a DWARF tag path */
58int get_real_path(const char *raw_path, const char *comp_dir,
59 char **new_path);
60
61struct probe_finder {
62 struct perf_probe_event *pev; /* Target probe event */
63
64 /* Callback when a probe point is found */
65 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
66
67 /* For function searching */
68 int lno; /* Line number */
69 Dwarf_Addr addr; /* Address */
70 const char *fname; /* Real file name */
71 Dwarf_Die cu_die; /* Current CU */
72 Dwarf_Die sp_die;
73 struct intlist *lcache; /* Line cache for lazy match */
74
75 /* For variable searching */
76#if _ELFUTILS_PREREQ(0, 142)
77 /* Call Frame Information from .eh_frame */
78 Dwarf_CFI *cfi_eh;
79 /* Call Frame Information from .debug_frame */
80 Dwarf_CFI *cfi_dbg;
81#endif
82 Dwarf_Op *fb_ops; /* Frame base attribute */
83 struct perf_probe_arg *pvar; /* Current target variable */
84 struct probe_trace_arg *tvar; /* Current result variable */
85};
86
87struct trace_event_finder {
88 struct probe_finder pf;
89 Dwfl_Module *mod; /* For solving symbols */
90 struct probe_trace_event *tevs; /* Found trace events */
91 int ntevs; /* Number of trace events */
92 int max_tevs; /* Max number of trace events */
93};
94
95struct available_var_finder {
96 struct probe_finder pf;
97 Dwfl_Module *mod; /* For solving symbols */
98 struct variable_list *vls; /* Found variable lists */
99 int nvls; /* Number of variable lists */
100 int max_vls; /* Max no. of variable lists */
101 bool child; /* Search child scopes */
102};
103
104struct line_finder {
105 struct line_range *lr; /* Target line range */
106
107 const char *fname; /* File name */
108 int lno_s; /* Start line number */
109 int lno_e; /* End line number */
110 Dwarf_Die cu_die; /* Current CU */
111 Dwarf_Die sp_die;
112 int found;
113};
114
115#endif /* HAVE_DWARF_SUPPORT */
116
117#endif /*_PROBE_FINDER_H */