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 "probe-event.h"
   7
   8 #define MAX_PATH_LEN             256
   9 #define MAX_PROBE_BUFFER        1024
  10 #define MAX_PROBES               128
  11
  12 static inline int is_c_varname(const char *name)
  13 {
  14         /* TODO */
  15         return isalpha(name[0]) || name[0] == '_';
  16 }
  17
  18 #ifdef DWARF_SUPPORT
  19
  20 #include "dwarf-aux.h"
  21
  22 /* TODO: export debuginfo data structure even if no dwarf support */
  23
  24 /* debug information structure */
  25 struct debuginfo {
  26         Dwarf           *dbg;
  27         Dwfl            *dwfl;
  28         Dwarf_Addr      bias;
  29 };
  30
  31 extern struct debuginfo *debuginfo__new(const char *path);
  32 extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr);
  33 extern void debuginfo__delete(struct debuginfo *self);
  34
  35 /* Find probe_trace_events specified by perf_probe_event from debuginfo */
  36 extern int debuginfo__find_trace_events(struct debuginfo *self,
  37                                         struct perf_probe_event *pev,
  38                                         struct probe_trace_event **tevs,
  39                                         int max_tevs);
  40
  41 /* Find a perf_probe_point from debuginfo */
  42 extern int debuginfo__find_probe_point(struct debuginfo *self,
  43                                        unsigned long addr,
  44                                        struct perf_probe_point *ppt);
  45
  46 /* Find a line range */
  47 extern int debuginfo__find_line_range(struct debuginfo *self,
  48                                       struct line_range *lr);
  49
  50 /* Find available variables */
  51 extern int debuginfo__find_available_vars_at(struct debuginfo *self,
  52                                              struct perf_probe_event *pev,
  53                                              struct variable_list **vls,
  54                                              int max_points, bool externs);
  55
  56 struct probe_finder {
  57         struct perf_probe_event *pev;           /* Target probe event */
  58
  59         /* Callback when a probe point is found */
  60         int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
  61
  62         /* For function searching */
  63         int                     lno;            /* Line number */
  64         Dwarf_Addr              addr;           /* Address */
  65         const char              *fname;         /* Real file name */
  66         Dwarf_Die               cu_die;         /* Current CU */
  67         Dwarf_Die               sp_die;
  68         struct list_head        lcache;         /* Line cache for lazy match */
  69
  70         /* For variable searching */
  71 #if _ELFUTILS_PREREQ(0, 142)
  72         Dwarf_CFI               *cfi;           /* Call Frame Information */
  73 #endif
  74         Dwarf_Op                *fb_ops;        /* Frame base attribute */
  75         struct perf_probe_arg   *pvar;          /* Current target variable */
  76         struct probe_trace_arg  *tvar;          /* Current result variable */
  77 };
  78
  79 struct trace_event_finder {
  80         struct probe_finder     pf;
  81         struct probe_trace_event *tevs;         /* Found trace events */
  82         int                     ntevs;          /* Number of trace events */
  83         int                     max_tevs;       /* Max number of trace events */
  84 };
  85
  86 struct available_var_finder {
  87         struct probe_finder     pf;
  88         struct variable_list    *vls;           /* Found variable lists */
  89         int                     nvls;           /* Number of variable lists */
  90         int                     max_vls;        /* Max no. of variable lists */
  91         bool                    externs;        /* Find external vars too */
  92         bool                    child;          /* Search child scopes */
  93 };
  94
  95 struct line_finder {
  96         struct line_range       *lr;            /* Target line range */
  97
  98         const char              *fname;         /* File name */
  99         int                     lno_s;          /* Start line number */
 100         int                     lno_e;          /* End line number */
 101         Dwarf_Die               cu_die;         /* Current CU */
 102         Dwarf_Die               sp_die;
 103         int                     found;
 104 };
 105
 106 #endif /* DWARF_SUPPORT */
 107
 108 #endif /*_PROBE_FINDER_H */