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 and uprobe-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 and uprobe-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 and uprobe-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         bool                            uprobes;        /* uprobes only */
  39         struct probe_trace_arg          *args;  /* Arguments */
  40 };
  41
  42 /* Perf probe probing point */
  43 struct perf_probe_point {
  44         char            *file;          /* File path */
  45         char            *function;      /* Function name */
  46         int             line;           /* Line number */
  47         bool            retprobe;       /* Return probe flag */
  48         char            *lazy_line;     /* Lazy matching pattern */
  49         unsigned long   offset;         /* Offset from function entry */
  50 };
  51
  52 /* Perf probe probing argument field chain */
  53 struct perf_probe_arg_field {
  54         struct perf_probe_arg_field     *next;  /* Next field */
  55         char                            *name;  /* Name of the field */
  56         long                            index;  /* Array index number */
  57         bool                            ref;    /* Referencing flag */
  58 };
  59
  60 /* Perf probe probing argument */
  61 struct perf_probe_arg {
  62         char                            *name;  /* Argument name */
  63         char                            *var;   /* Variable name */
  64         char                            *type;  /* Type name */
  65         struct perf_probe_arg_field     *field; /* Structure fields */
  66 };
  67
  68 /* Perf probe probing event (point + arg) */
  69 struct perf_probe_event {
  70         char                    *event; /* Event name */
  71         char                    *group; /* Group name */
  72         struct perf_probe_point point;  /* Probe point */
  73         int                     nargs;  /* Number of arguments */
  74         bool                    uprobes;
  75         struct perf_probe_arg   *args;  /* Arguments */
  76 };
  77
  78
  79 /* Line number container */
  80 struct line_node {
  81         struct list_head        list;
  82         int                     line;
  83 };
  84
  85 /* Line range */
  86 struct line_range {
  87         char                    *file;          /* File name */
  88         char                    *function;      /* Function name */
  89         int                     start;          /* Start line number */
  90         int                     end;            /* End line number */
  91         int                     offset;         /* Start line offset */
  92         char                    *path;          /* Real path name */
  93         char                    *comp_dir;      /* Compile directory */
  94         struct list_head        line_list;      /* Visible lines */
  95 };
  96
  97 /* List of variables */
  98 struct variable_list {
  99         struct probe_trace_point        point;  /* Actual probepoint */
 100         struct strlist                  *vars;  /* Available variables */
 101 };
 102
 103 /* Command string to events */
 104 extern int parse_perf_probe_command(const char *cmd,
 105                                     struct perf_probe_event *pev);
 106
 107 /* Events to command string */
 108 extern char *synthesize_perf_probe_command(struct perf_probe_event *pev);
 109 extern char *synthesize_probe_trace_command(struct probe_trace_event *tev);
 110 extern int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf,
 111                                      size_t len);
 112
 113 /* Check the perf_probe_event needs debuginfo */
 114 extern bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
 115
 116 /* Release event contents */
 117 extern void clear_perf_probe_event(struct perf_probe_event *pev);
 118
 119 /* Command string to line-range */
 120 extern int parse_line_range_desc(const char *cmd, struct line_range *lr);
 121
 122 /* Internal use: Return kernel/module path */
 123 extern const char *kernel_get_module_path(const char *module);
 124
 125 extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
 126                                  int max_probe_points, const char *module,
 127                                  bool force_add);
 128 extern int del_perf_probe_events(struct strlist *dellist);
 129 extern int show_perf_probe_events(void);
 130 extern int show_line_range(struct line_range *lr, const char *module);
 131 extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
 132                                int max_probe_points, const char *module,
 133                                struct strfilter *filter, bool externs);
 134 extern int show_available_funcs(const char *module, struct strfilter *filter,
 135                                 bool user);
 136
 137 /* Maximum index number of event-name postfix */
 138 #define MAX_EVENT_INDEX 1024
 139
 140 #endif /*_PROBE_EVENT_H */