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