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 /* Find kprobe_trace_events specified by perf_probe_event from debuginfo */
  20 extern int find_kprobe_trace_events(int fd, struct perf_probe_event *pev,
  21                                     struct kprobe_trace_event **tevs,
  22                                     int max_tevs);
  23
  24 /* Find a perf_probe_point from debuginfo */
  25 extern int find_perf_probe_point(int fd, unsigned long addr,
  26                                  struct perf_probe_point *ppt);
  27
  28 extern int find_line_range(int fd, struct line_range *lr);
  29
  30 #include <dwarf.h>
  31 #include <libdw.h>
  32 #include <version.h>
  33
  34 struct probe_finder {
  35         struct perf_probe_event *pev;           /* Target probe event */
  36         struct kprobe_trace_event *tevs;        /* Result trace events */
  37         int                     ntevs;          /* Number of trace events */
  38         int                     max_tevs;       /* Max number of trace events */
  39
  40         /* For function searching */
  41         int                     lno;            /* Line number */
  42         Dwarf_Addr              addr;           /* Address */
  43         const char              *fname;         /* Real file name */
  44         Dwarf_Die               cu_die;         /* Current CU */
  45         struct list_head        lcache;         /* Line cache for lazy match */
  46
  47         /* For variable searching */
  48 #if _ELFUTILS_PREREQ(0, 142)
  49         Dwarf_CFI               *cfi;           /* Call Frame Information */
  50 #endif
  51         Dwarf_Op                *fb_ops;        /* Frame base attribute */
  52         struct perf_probe_arg   *pvar;          /* Current target variable */
  53         struct kprobe_trace_arg *tvar;          /* Current result variable */
  54 };
  55
  56 struct line_finder {
  57         struct line_range       *lr;            /* Target line range */
  58
  59         const char              *fname;         /* File name */
  60         int                     lno_s;          /* Start line number */
  61         int                     lno_e;          /* End line number */
  62         Dwarf_Die               cu_die;         /* Current CU */
  63         int                     found;
  64 };
  65
  66 #endif /* DWARF_SUPPORT */
  67
  68 #endif /*_PROBE_FINDER_H */