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 | |