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