tools/perf/util/probe-event.h

   1 #ifndef _PROBE_EVENT_H
   2 #define _PROBE_EVENT_H
   3
   4 #include <stdbool.h>
   5 #include "intlist.h"
   6 #include "strlist.h"
   7 #include "strfilter.h"
   8
   9 /* Probe related configurations */
  10 struct probe_conf {
  11         bool    show_ext_vars;
  12         bool    show_location_range;
  13         bool    force_add;
  14         bool    no_inlines;
  15         int     max_probes;
  16 };
  17 extern struct probe_conf probe_conf;
  18 extern bool probe_event_dry_run;
  19
  20 /* kprobe-tracer and uprobe-tracer tracing point */
  21 struct probe_trace_point {
  22         char            *realname;      /* function real name (if needed) */
  23         char            *symbol;        /* Base symbol */
  24         char            *module;        /* Module name */
  25         unsigned long   offset;         /* Offset from symbol */
  26         unsigned long   address;        /* Actual address of the trace point */
  27         bool            retprobe;       /* Return probe flag */
  28 };
  29
  30 /* probe-tracer tracing argument referencing offset */
  31 struct probe_trace_arg_ref {
  32         struct probe_trace_arg_ref      *next;  /* Next reference */
  33         long                            offset; /* Offset value */
  34 };
  35
  36 /* kprobe-tracer and uprobe-tracer tracing argument */
  37 struct probe_trace_arg {
  38         char                            *name;  /* Argument name */
  39         char                            *value; /* Base value */
  40         char                            *type;  /* Type name */
  41         struct probe_trace_arg_ref      *ref;   /* Referencing offset */
  42 };
  43
  44 /* kprobe-tracer and uprobe-tracer tracing event (point + arg) */
  45 struct probe_trace_event {
  46         char                            *event; /* Event name */
  47         char                            *group; /* Group name */
  48         struct probe_trace_point        point;  /* Trace point */
  49         int                             nargs;  /* Number of args */
  50         bool                            uprobes;        /* uprobes only */
  51         struct probe_trace_arg          *args;  /* Arguments */
  52 };
  53
  54 /* Perf probe probing point */
  55 struct perf_probe_point {
  56         char            *file;          /* File path */
  57         char            *function;      /* Function name */
  58         int             line;           /* Line number */
  59         bool            retprobe;       /* Return probe flag */
  60         char            *lazy_line;     /* Lazy matching pattern */
  61         unsigned long   offset;         /* Offset from function entry */
  62         unsigned long   abs_address;    /* Absolute address of the point */
  63 };
  64
  65 /* Perf probe probing argument field chain */
  66 struct perf_probe_arg_field {
  67         struct perf_probe_arg_field     *next;  /* Next field */
  68         char                            *name;  /* Name of the field */
  69         long                            index;  /* Array index number */
  70         bool                            ref;    /* Referencing flag */
  71 };
  72
  73 /* Perf probe probing argument */
  74 struct perf_probe_arg {
  75         char                            *name;  /* Argument name */
  76         char                            *var;   /* Variable name */
  77         char                            *type;  /* Type name */
  78         struct perf_probe_arg_field     *field; /* Structure fields */
  79 };
  80
  81 /* Perf probe probing event (point + arg) */
  82 struct perf_probe_event {
  83         char                    *event; /* Event name */
  84         char                    *group; /* Group name */
  85         struct perf_probe_point point;  /* Probe point */
  86         int                     nargs;  /* Number of arguments */
  87         bool                    uprobes;        /* Uprobe event flag */
  88         char                    *target;        /* Target binary */
  89         struct perf_probe_arg   *args;  /* Arguments */
  90         struct probe_trace_event *tevs;
  91         int                     ntevs;
  92 };
  93
  94 /* Line range */
  95 struct line_range {
  96         char                    *file;          /* File name */
  97         char                    *function;      /* Function name */
  98         int                     start;          /* Start line number */
  99         int                     end;            /* End line number */
 100         int                     offset;         /* Start line offset */
 101         char                    *path;          /* Real path name */
 102         char                    *comp_dir;      /* Compile directory */
 103         struct intlist          *line_list;     /* Visible lines */
 104 };
 105
 106 /* List of variables */
 107 struct variable_list {
 108         struct probe_trace_point        point;  /* Actual probepoint */
 109         struct strlist                  *vars;  /* Available variables */
 110 };
 111
 112 struct map;
 113 int init_probe_symbol_maps(bool user_only);
 114 void exit_probe_symbol_maps(void);
 115
 116 /* Command string to events */
 117 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev);
 118 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev);
 119
 120 /* Events to command string */
 121 char *synthesize_perf_probe_command(struct perf_probe_event *pev);
 122 char *synthesize_probe_trace_command(struct probe_trace_event *tev);
 123 int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len);
 124
 125 /* Check the perf_probe_event needs debuginfo */
 126 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
 127
 128 /* Release event contents */
 129 void clear_perf_probe_event(struct perf_probe_event *pev);
 130 void clear_probe_trace_event(struct probe_trace_event *tev);
 131
 132 /* Command string to line-range */
 133 int parse_line_range_desc(const char *cmd, struct line_range *lr);
 134
 135 /* Release line range members */
 136 void line_range__clear(struct line_range *lr);
 137
 138 /* Initialize line range */
 139 int line_range__init(struct line_range *lr);
 140
 141 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 142 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 143 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 144 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 145 int del_perf_probe_events(struct strfilter *filter);
 146
 147 int show_perf_probe_event(const char *group, const char *event,
 148                           struct perf_probe_event *pev,
 149                           const char *module, bool use_stdout);
 150 int show_perf_probe_events(struct strfilter *filter);
 151 int show_line_range(struct line_range *lr, const char *module, bool user);
 152 int show_available_vars(struct perf_probe_event *pevs, int npevs,
 153                         struct strfilter *filter);
 154 int show_available_funcs(const char *module, struct strfilter *filter, bool user);
 155 bool arch__prefers_symtab(void);
 156 void arch__fix_tev_from_maps(struct perf_probe_event *pev,
 157                              struct probe_trace_event *tev, struct map *map);
 158
 159 /* If there is no space to write, returns -E2BIG. */
 160 int e_snprintf(char *str, size_t size, const char *format, ...)
 161         __attribute__((format(printf, 3, 4)));
 162
 163 /* Maximum index number of event-name postfix */
 164 #define MAX_EVENT_INDEX 1024
 165
 166 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
 167                             struct perf_probe_arg *pvar);
 168
 169 #endif /*_PROBE_EVENT_H */