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
18 static 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 */
30 int 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 */
35 int debuginfo__find_probe_point(struct debuginfo *dbg, u64 addr,
36 struct perf_probe_point *ppt);
37
38 /* Find a line range */
39 int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr);
40
41 /* Find available variables */
42 int 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 */
47 int find_source_path(const char *raw_path, const char *sbuild_id,
48 const char *comp_dir, char **new_path);
49
50 struct 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
79 struct 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
87 struct 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
96 struct 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 */
110
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