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
   8 struct intlist;
   9 struct nsinfo;
  10
  11 /* Probe related configurations */
  12 struct probe_conf {
  13         bool    show_ext_vars;
  14         bool    show_location_range;
  15         bool    force_add;
  16         bool    no_inlines;
  17         bool    cache;
  18         bool    bootconfig;
  19         int     max_probes;
  20         unsigned long   magic_num;
  21 };
  22 extern struct probe_conf probe_conf;
  23 extern bool probe_event_dry_run;
  24
  25 #define DEFAULT_PROBE_MAGIC_NUM 0xdeade12d      /* u32: 3735937325 */
  26
  27 struct symbol;
  28
  29 /* kprobe-tracer and uprobe-tracer tracing point */
  30 struct probe_trace_point {
  31         char            *realname;      /* function real name (if needed) */
  32         char            *symbol;        /* Base symbol */
  33         char            *module;        /* Module name */
  34         unsigned long   offset;         /* Offset from symbol */
  35         unsigned long   ref_ctr_offset; /* SDT reference counter offset */
  36         u64             address;        /* Actual address of the trace point */
  37         bool            retprobe;       /* Return probe flag */
  38 };
  39
  40 /* probe-tracer tracing argument referencing offset */
  41 struct probe_trace_arg_ref {
  42         struct probe_trace_arg_ref      *next;  /* Next reference */
  43         long                            offset; /* Offset value */
  44         bool                            user_access;    /* User-memory access */
  45 };
  46
  47 /* kprobe-tracer and uprobe-tracer tracing argument */
  48 struct probe_trace_arg {
  49         char                            *name;  /* Argument name */
  50         char                            *value; /* Base value */
  51         char                            *type;  /* Type name */
  52         struct probe_trace_arg_ref      *ref;   /* Referencing offset */
  53 };
  54
  55 /* kprobe-tracer and uprobe-tracer tracing event (point + arg) */
  56 struct probe_trace_event {
  57         char                            *event; /* Event name */
  58         char                            *group; /* Group name */
  59         struct probe_trace_point        point;  /* Trace point */
  60         int                             nargs;  /* Number of args */
  61         bool                            uprobes;        /* uprobes only */
  62         struct probe_trace_arg          *args;  /* Arguments */
  63 };
  64
  65 /* Perf probe probing point */
  66 struct perf_probe_point {
  67         char            *file;          /* File path */
  68         char            *function;      /* Function name */
  69         int             line;           /* Line number */
  70         bool            retprobe;       /* Return probe flag */
  71         char            *lazy_line;     /* Lazy matching pattern */
  72         unsigned long   offset;         /* Offset from function entry */
  73         u64             abs_address;    /* Absolute address of the point */
  74 };
  75
  76 /* Perf probe probing argument field chain */
  77 struct perf_probe_arg_field {
  78         struct perf_probe_arg_field     *next;  /* Next field */
  79         char                            *name;  /* Name of the field */
  80         long                            index;  /* Array index number */
  81         bool                            ref;    /* Referencing flag */
  82 };
  83
  84 /* Perf probe probing argument */
  85 struct perf_probe_arg {
  86         char                            *name;  /* Argument name */
  87         char                            *var;   /* Variable name */
  88         char                            *type;  /* Type name */
  89         struct perf_probe_arg_field     *field; /* Structure fields */
  90         bool                            user_access;    /* User-memory access */
  91 };
  92
  93 /* Perf probe probing event (point + arg) */
  94 struct perf_probe_event {
  95         char                    *event; /* Event name */
  96         char                    *group; /* Group name */
  97         struct perf_probe_point point;  /* Probe point */
  98         int                     nargs;  /* Number of arguments */
  99         bool                    sdt;    /* SDT/cached event flag */
 100         bool                    uprobes;        /* Uprobe event flag */
 101         char                    *target;        /* Target binary */
 102         struct perf_probe_arg   *args;  /* Arguments */
 103         struct probe_trace_event *tevs;
 104         int                     ntevs;
 105         struct nsinfo           *nsi;   /* Target namespace */
 106 };
 107
 108 /* Line range */
 109 struct line_range {
 110         char                    *file;          /* File name */
 111         char                    *function;      /* Function name */
 112         int                     start;          /* Start line number */
 113         int                     end;            /* End line number */
 114         int                     offset;         /* Start line offset */
 115         char                    *path;          /* Real path name */
 116         char                    *comp_dir;      /* Compile directory */
 117         struct intlist          *line_list;     /* Visible lines */
 118 };
 119
 120 struct strlist;
 121
 122 /* List of variables */
 123 struct variable_list {
 124         struct probe_trace_point        point;  /* Actual probepoint */
 125         struct strlist                  *vars;  /* Available variables */
 126 };
 127
 128 struct map;
 129 int init_probe_symbol_maps(bool user_only);
 130 void exit_probe_symbol_maps(void);
 131
 132 /* Command string to events */
 133 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev);
 134 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev);
 135
 136 /* Events to command string */
 137 char *synthesize_perf_probe_command(struct perf_probe_event *pev);
 138 char *synthesize_probe_trace_command(struct probe_trace_event *tev);
 139 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa);
 140
 141 int perf_probe_event__copy(struct perf_probe_event *dst,
 142                            struct perf_probe_event *src);
 143
 144 bool perf_probe_with_var(struct perf_probe_event *pev);
 145
 146 /* Check the perf_probe_event needs debuginfo */
 147 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
 148
 149 /* Release event contents */
 150 void clear_perf_probe_event(struct perf_probe_event *pev);
 151 void clear_probe_trace_event(struct probe_trace_event *tev);
 152
 153 /* Command string to line-range */
 154 int parse_line_range_desc(const char *cmd, struct line_range *lr);
 155
 156 /* Release line range members */
 157 void line_range__clear(struct line_range *lr);
 158
 159 /* Initialize line range */
 160 int line_range__init(struct line_range *lr);
 161
 162 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 163 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 164 int show_probe_trace_events(struct perf_probe_event *pevs, int npevs);
 165 int show_bootconfig_events(struct perf_probe_event *pevs, int npevs);
 166 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs);
 167
 168 struct strfilter;
 169
 170 int show_perf_probe_event(const char *group, const char *event,
 171                           struct perf_probe_event *pev,
 172                           const char *module, bool use_stdout);
 173 int show_perf_probe_events(struct strfilter *filter);
 174 int show_line_range(struct line_range *lr, const char *module,
 175                     struct nsinfo *nsi, bool user);
 176 int show_available_vars(struct perf_probe_event *pevs, int npevs,
 177                         struct strfilter *filter);
 178 int show_available_funcs(const char *module, struct nsinfo *nsi,
 179                          struct strfilter *filter, bool user);
 180 void arch__fix_tev_from_maps(struct perf_probe_event *pev,
 181                              struct probe_trace_event *tev, struct map *map,
 182                              struct symbol *sym);
 183
 184 /* If there is no space to write, returns -E2BIG. */
 185 int e_snprintf(char *str, size_t size, const char *format, ...) __printf(3, 4);
 186
 187 /* Maximum index number of event-name postfix */
 188 #define MAX_EVENT_INDEX 1024
 189
 190 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
 191                             struct perf_probe_arg *pvar);
 192
 193 struct map *get_target_map(const char *target, struct nsinfo *nsi, bool user);
 194
 195 void arch__post_process_probe_trace_events(struct perf_probe_event *pev,
 196                                            int ntevs);
 197
 198 #endif /*_PROBE_EVENT_H */