tools/perf/util/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 static inline int is_c_varname(const char *name)
  14 {
  15         /* TODO */
  16         return isalpha(name[0]) || name[0] == '_';
  17 }
  18
  19 #ifdef HAVE_DWARF_SUPPORT
  20
  21 #include "dwarf-aux.h"
  22
  23 /* TODO: export debuginfo data structure even if no dwarf support */
  24
  25 /* debug information structure */
  26 struct debuginfo {
  27         Dwarf           *dbg;
  28         Dwfl_Module     *mod;
  29         Dwfl            *dwfl;
  30         Dwarf_Addr      bias;
  31 };
  32
  33 /* This also tries to open distro debuginfo */
  34 extern struct debuginfo *debuginfo__new(const char *path);
  35 extern void debuginfo__delete(struct debuginfo *dbg);
  36
  37 /* Find probe_trace_events specified by perf_probe_event from debuginfo */
  38 extern int debuginfo__find_trace_events(struct debuginfo *dbg,
  39                                         struct perf_probe_event *pev,
  40                                         struct probe_trace_event **tevs,
  41                                         int max_tevs);
  42
  43 /* Find a perf_probe_point from debuginfo */
  44 extern int debuginfo__find_probe_point(struct debuginfo *dbg,
  45                                        unsigned long addr,
  46                                        struct perf_probe_point *ppt);
  47
  48 /* Find a line range */
  49 extern int debuginfo__find_line_range(struct debuginfo *dbg,
  50                                       struct line_range *lr);
  51
  52 /* Find available variables */
  53 extern int debuginfo__find_available_vars_at(struct debuginfo *dbg,
  54                                              struct perf_probe_event *pev,
  55                                              struct variable_list **vls,
  56                                              int max_points, bool externs);
  57
  58 struct probe_finder {
  59         struct perf_probe_event *pev;           /* Target probe event */
  60
  61         /* Callback when a probe point is found */
  62         int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
  63
  64         /* For function searching */
  65         int                     lno;            /* Line number */
  66         Dwarf_Addr              addr;           /* Address */
  67         const char              *fname;         /* Real file name */
  68         Dwarf_Die               cu_die;         /* Current CU */
  69         Dwarf_Die               sp_die;
  70         struct intlist          *lcache;        /* Line cache for lazy match */
  71
  72         /* For variable searching */
  73 #if _ELFUTILS_PREREQ(0, 142)
  74         Dwarf_CFI               *cfi;           /* Call Frame Information */
  75 #endif
  76         Dwarf_Op                *fb_ops;        /* Frame base attribute */
  77         struct perf_probe_arg   *pvar;          /* Current target variable */
  78         struct probe_trace_arg  *tvar;          /* Current result variable */
  79 };
  80
  81 struct trace_event_finder {
  82         struct probe_finder     pf;
  83         Dwfl_Module             *mod;           /* For solving symbols */
  84         struct probe_trace_event *tevs;         /* Found trace events */
  85         int                     ntevs;          /* Number of trace events */
  86         int                     max_tevs;       /* Max number of trace events */
  87 };
  88
  89 struct available_var_finder {
  90         struct probe_finder     pf;
  91         Dwfl_Module             *mod;           /* For solving symbols */
  92         struct variable_list    *vls;           /* Found variable lists */
  93         int                     nvls;           /* Number of variable lists */
  94         int                     max_vls;        /* Max no. of variable lists */
  95         bool                    externs;        /* Find external vars too */
  96         bool                    child;          /* Search child scopes */
  97 };
  98
  99 struct line_finder {
 100         struct line_range       *lr;            /* Target line range */
 101
 102         const char              *fname;         /* File name */
 103         int                     lno_s;          /* Start line number */
 104         int                     lno_e;          /* End line number */
 105         Dwarf_Die               cu_die;         /* Current CU */
 106         Dwarf_Die               sp_die;
 107         int                     found;
 108 };
 109
 110 #endif /* HAVE_DWARF_SUPPORT */
 111
 112 #endif /*_PROBE_FINDER_H */