tools/perf/util/probe-event.h

   1 #ifndef _PROBE_EVENT_H
   2 #define _PROBE_EVENT_H
   3
   4 #include <stdbool.h>
   5 #include "strlist.h"
   6 #include "strfilter.h"
   7
   8 extern bool probe_event_dry_run;
   9
  10 /* kprobe-tracer tracing point */
  11 struct probe_trace_point {
  12         char            *symbol;        /* Base symbol */
  13         unsigned long   offset;         /* Offset from symbol */
  14         bool            retprobe;       /* Return probe flag */
  15 };
  16
  17 /* probe-tracer tracing argument referencing offset */
  18 struct probe_trace_arg_ref {
  19         struct probe_trace_arg_ref      *next;  /* Next reference */
  20         long                            offset; /* Offset value */
  21 };
  22
  23 /* kprobe-tracer tracing argument */
  24 struct probe_trace_arg {
  25         char                            *name;  /* Argument name */
  26         char                            *value; /* Base value */
  27         char                            *type;  /* Type name */
  28         struct probe_trace_arg_ref      *ref;   /* Referencing offset */
  29 };
  30
  31 /* kprobe-tracer tracing event (point + arg) */
  32 struct probe_trace_event {
  33         char                            *event; /* Event name */
  34         char                            *group; /* Group name */
  35         struct probe_trace_point        point;  /* Trace point */
  36         int                             nargs;  /* Number of args */
  37         struct probe_trace_arg          *args;  /* Arguments */
  38 };
  39
  40 /* Perf probe probing point */
  41 struct perf_probe_point {
  42         char            *file;          /* File path */
  43         char            *function;      /* Function name */
  44         int             line;           /* Line number */
  45         bool            retprobe;       /* Return probe flag */
  46         char            *lazy_line;     /* Lazy matching pattern */
  47         unsigned long   offset;         /* Offset from function entry */
  48 };
  49
  50 /* Perf probe probing argument field chain */
  51 struct perf_probe_arg_field {
  52         struct perf_probe_arg_field     *next;  /* Next field */
  53         char                            *name;  /* Name of the field */
  54         long                            index;  /* Array index number */
  55         bool                            ref;    /* Referencing flag */
  56 };
  57
  58 /* Perf probe probing argument */
  59 struct perf_probe_arg {
  60         char                            *name;  /* Argument name */
  61         char                            *var;   /* Variable name */
  62         char                            *type;  /* Type name */
  63         struct perf_probe_arg_field     *field; /* Structure fields */
  64 };
  65
  66 /* Perf probe probing event (point + arg) */
  67 struct perf_probe_event {
  68         char                    *event; /* Event name */
  69         char                    *group; /* Group name */
  70         struct perf_probe_point point;  /* Probe point */
  71         int                     nargs;  /* Number of arguments */
  72         struct perf_probe_arg   *args;  /* Arguments */
  73 };
  74
  75
  76 /* Line number container */
  77 struct line_node {
  78         struct list_head        list;
  79         int                     line;
  80 };
  81
  82 /* Line range */
  83 struct line_range {
  84         char                    *file;          /* File name */
  85         char                    *function;      /* Function name */
  86         int                     start;          /* Start line number */
  87         int                     end;            /* End line number */
  88         int                     offset;         /* Start line offset */
  89         char                    *path;          /* Real path name */
  90         char                    *comp_dir;      /* Compile directory */
  91         struct list_head        line_list;      /* Visible lines */
  92 };
  93
  94 /* List of variables */
  95 struct variable_list {
  96         struct probe_trace_point        point;  /* Actual probepoint */
  97         struct strlist                  *vars;  /* Available variables */
  98 };
  99
 100 /* Command string to events */
 101 extern int parse_perf_probe_command(const char *cmd,
 102                                     struct perf_probe_event *pev);
 103
 104 /* Events to command string */
 105 extern char *synthesize_perf_probe_command(struct perf_probe_event *pev);
 106 extern char *synthesize_probe_trace_command(struct probe_trace_event *tev);
 107 extern int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf,
 108                                      size_t len);
 109
 110 /* Check the perf_probe_event needs debuginfo */
 111 extern bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
 112
 113 /* Release event contents */
 114 extern void clear_perf_probe_event(struct perf_probe_event *pev);
 115
 116 /* Command string to line-range */
 117 extern int parse_line_range_desc(const char *cmd, struct line_range *lr);
 118
 119 /* Internal use: Return kernel/module path */
 120 extern const char *kernel_get_module_path(const char *module);
 121
 122 extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
 123                                  int max_probe_points, const char *module,
 124                                  bool force_add);
 125 extern int del_perf_probe_events(struct strlist *dellist);
 126 extern int show_perf_probe_events(void);
 127 extern int show_line_range(struct line_range *lr, const char *module);
 128 extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
 129                                int max_probe_points, const char *module,
 130                                struct strfilter *filter, bool externs);
 131 extern int show_available_funcs(const char *module, struct strfilter *filter);
 132
 133
 134 /* Maximum index number of event-name postfix */
 135 #define MAX_EVENT_INDEX 1024
 136
 137 #endif /*_PROBE_EVENT_H */