tools/perf/util/probe-event.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _PROBE_EVENT_H
   3 #define _PROBE_EVENT_H
   4
   5 #include <linux/compiler.h>
   6 #include <stdbool.h>
   7 #include "intlist.h"
   8 #include "namespaces.h"
   9
  10 /* Probe related configurations */
  11 struct probe_conf {
  12         bool    show_ext_vars;
  13         bool    show_location_range;
  14         bool    force_add;
  15         bool    no_inlines;
  16         bool    cache;
  17         int     max_probes;
  18 };
  19 extern struct probe_conf probe_conf;
  20 extern bool probe_event_dry_run;
  21
  22 struct symbol;
  23
  24 /* kprobe-tracer and uprobe-tracer tracing point */
  25 struct probe_trace_point {
  26         char            *realname;      /* function real name (if needed) */
  27         char            *symbol;        /* Base symbol */
  28         char            *module;        /* Module name */
  29         unsigned long   offset;         /* Offset from symbol */
  30         unsigned long   address;        /* Actual address of the trace point */
  31         bool            retprobe;       /* Return probe flag */
  32 };
  33
  34 /* probe-tracer tracing argument referencing offset */
  35 struct probe_trace_arg_ref {
  36         struct probe_trace_arg_ref      *next;  /* Next reference */
  37         long                            offset; /* Offset value */
  38 };
  39
  40 /* kprobe-tracer and uprobe-tracer tracing argument */
  41 struct probe_trace_arg {
  42         char                            *name;  /* Argument name */
  43         char                            *value; /* Base value */
  44         char                            *type;  /* Type name */
  45         struct probe_trace_arg_ref      *ref;   /* Referencing offset */
  46 };
  47
  48 /* kprobe-tracer and uprobe-tracer tracing event (point + arg) */
  49 struct probe_trace_event {
  50         char                            *event; /* Event name */
  51         char                            *group; /* Group name */
  52         struct probe_trace_point        point;  /* Trace point */
  53         int                             nargs;  /* Number of args */
  54         bool                            uprobes;        /* uprobes only */
  55         struct probe_trace_arg          *args;  /* Arguments */
  56 };
  57
  58 /* Perf probe probing point */
  59 struct perf_probe_point {
  60         char            *file;          /* File path */
  61         char            *function;      /* Function name */
  62         int             line;           /* Line number */
  63         bool            retprobe;       /* Return probe flag */
  64         char            *lazy_line;     /* Lazy matching pattern */
  65         unsigned long   offset;         /* Offset from function entry */
  66         unsigned long   abs_address;    /* Absolute address of the point */
  67 };
  68
  69 /* Perf probe probing argument field chain */
  70 struct perf_probe_arg_field {
  71         struct perf_probe_arg_field     *next;  /* Next field */
  72         char                            *name;  /* Name of the field */
  73         long                            index;  /* Array index number */
  74         bool                            ref;    /* Referencing flag */
  75 };
  76
  77 /* Perf probe probing argument */
  78 struct perf_probe_arg {
  79         char                            *name;  /* Argument name */
  80         char                            *var;   /* Variable name */
  81         char                            *type;  /* Type name */
  82         struct perf_probe_arg_field     *field; /* Structure fields */
  83 };
  84
  85 /* Perf probe probing event (point + arg) */
  86 struct perf_probe_event {
  87         char                    *event; /* Event name */
  88         char                    *group; /* Group name */
  89         struct perf_probe_point point;  /* Probe point */
  90         int                     nargs;  /* Number of arguments */
  91         bool                    sdt;    /* SDT/cached event flag */
  92         bool                    uprobes;        /* Uprobe event flag */
  93         char                    *target;        /* Target binary */
  94         struct perf_probe_arg   *args;  /* Arguments */
  95         struct probe_trace_event *tevs;
  96         int                     ntevs;
  97         struct nsinfo           *nsi;   /* Target namespace */
  98 };
  99
 100 /* Line range */
 101 struct line_range {
 102         char                    *file;          /* File name */
 103         char                    *function;      /* Function name */
 104         int                     start;          /* Start line number */
 105         int                     end;            /* End line number */
 106         int                     offset;         /* Start line offset */
 107         char                    *path;          /* Real path name */
 108         char                    *comp_dir;      /* Compile directory */
 109         struct intlist          *line_list;     /* Visible lines */
 110 };
 111
 112 struct strlist;
 113
 114 /* List of variables */
 115 struct variable_list {
 116         struct probe_trace_point        point;  /* Actual probepoint */
 117         struct strlist                  *vars;  /* Available variables */
 118 };
 119
 120 struct map;
 121 int init_probe_symbol_maps(bool user_only);
 122 void exit_probe_symbol_maps(void);
 123
 124 /* Command string to events */
 125 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev);
 126 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev);
 127
 128 /* Events to command string */
 129 char *synthesize_perf_probe_command(struct perf_probe_event *pev);
 130 char *synthesize_probe_trace_command(struct probe_trace_event *tev);
 131 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa);
 132 char *synthesize_perf_probe_point(struct perf_probe_point *pp);
 133
 134 int perf_probe_event__copy(struct perf_probe_event *dst,
 135                            struct perf_probe_event *src);
 136
 137 bool perf_probe_with_var(struct perf_probe_event *pev);
 138
 139 /* Check the perf_probe_event needs debuginfo */
 140 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
 141
 142 /* Release event contents */
 143 void clear_perf_probe_event(struct perf_probe_event *pev);
 144 void clear_probe_trace_event(struct probe_trace_event *tev);
 145
 146 /* Command string to line-range */
 147 int parse_line_range_desc(const char *cmd, struct line_range *lr);
 148
 149 /* Release line range members */
 150 void line_range__clear(struct line_range *lr);
 151
 152 /* Initialize line range */
 153 int line_range__init(struct line_range *lr);
 154
 155 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 156 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 157 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 158 int show_probe_trace_events(struct perf_probe_event *pevs, int npevs);
 159 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 160
 161 struct strfilter;
 162
 163 int del_perf_probe_events(struct strfilter *filter);
 164
 165 int show_perf_probe_event(const char *group, const char *event,
 166                           struct perf_probe_event *pev,
 167                           const char *module, bool use_stdout);
 168 int show_perf_probe_events(struct strfilter *filter);
 169 int show_line_range(struct line_range *lr, const char *module,
 170                     struct nsinfo *nsi, bool user);
 171 int show_available_vars(struct perf_probe_event *pevs, int npevs,
 172                         struct strfilter *filter);
 173 int show_available_funcs(const char *module, struct nsinfo *nsi,
 174                          struct strfilter *filter, bool user);
 175 void arch__fix_tev_from_maps(struct perf_probe_event *pev,
 176                              struct probe_trace_event *tev, struct map *map,
 177                              struct symbol *sym);
 178
 179 /* If there is no space to write, returns -E2BIG. */
 180 int e_snprintf(char *str, size_t size, const char *format, ...) __printf(3, 4);
 181
 182 /* Maximum index number of event-name postfix */
 183 #define MAX_EVENT_INDEX 1024
 184
 185 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
 186                             struct perf_probe_arg *pvar);
 187
 188 struct map *get_target_map(const char *target, struct nsinfo *nsi, bool user);
 189
 190 void arch__post_process_probe_trace_events(struct perf_probe_event *pev,
 191                                            int ntevs);
 192
 193 #endif /*_PROBE_EVENT_H */