perf/probes: Support function entry relative line number
[linux-2.6.git] / tools / perf / util / probe-finder.h
1 #ifndef _PROBE_FINDER_H
2 #define _PROBE_FINDER_H
3
4 #define MAX_PATH_LEN 256
5 #define MAX_PROBE_BUFFER 1024
6 #define MAX_PROBES 128
7
8 static inline int is_c_varname(const char *name)
9 {
10         /* TODO */
11         return isalpha(name[0]) || name[0] == '_';
12 }
13
14 struct probe_point {
15         /* Inputs */
16         char    *file;          /* File name */
17         int     line;           /* Line number */
18
19         char    *function;      /* Function name */
20         int     offset;         /* Offset bytes */
21
22         int     nr_args;        /* Number of arguments */
23         char    **args;         /* Arguments */
24
25         int     retprobe;       /* Return probe */
26
27         /* Output */
28         int     found;          /* Number of found probe points */
29         char    *probes[MAX_PROBES];    /* Output buffers (will be allocated)*/
30 };
31
32 #ifndef NO_LIBDWARF
33 extern int find_probepoint(int fd, struct probe_point *pp);
34
35 #include <libdwarf/dwarf.h>
36 #include <libdwarf/libdwarf.h>
37
38 struct probe_finder {
39         struct probe_point      *pp;    /* Target probe point */
40
41         /* For function searching */
42         Dwarf_Addr      addr;           /* Address */
43         Dwarf_Unsigned  fno;            /* File number */
44         Dwarf_Unsigned  lno;            /* Line number */
45         Dwarf_Off       inl_offs;       /* Inline offset */
46         Dwarf_Die       cu_die;         /* Current CU */
47
48         /* For variable searching */
49         Dwarf_Addr      cu_base;        /* Current CU base address */
50         Dwarf_Locdesc   fbloc;          /* Location of Current Frame Base */
51         const char      *var;           /* Current variable name */
52         char            *buf;           /* Current output buffer */
53         int             len;            /* Length of output buffer */
54 };
55 #endif /* NO_LIBDWARF */
56
57 #endif /*_PROBE_FINDER_H */