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