gdb/tracepoint.h

   1 /* Data structures associated with tracepoints in GDB.
   2    Copyright (C) 1997-2013 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #if !defined (TRACEPOINT_H)
  20 #define TRACEPOINT_H 1
  21
  22 #include "breakpoint.h"
  23 #include "target.h"
  24 #include "memrange.h"
  25 #include "gdb_vecs.h"
  26
  27 /* A trace state variable is a value managed by a target being
  28    traced.  A trace state variable (or tsv for short) can be accessed
  29    and assigned to by tracepoint actions and conditionals, but is not
  30    part of the program being traced, and it doesn't have to be
  31    collected.  Effectively the variables are scratch space for
  32    tracepoints.  */
  33
  34 struct trace_state_variable
  35   {
  36     /* The variable's name.  The user has to prefix with a dollar sign,
  37        but we don't store that internally.  */
  38     const char *name;
  39
  40     /* An id number assigned by GDB, and transmitted to targets.  */
  41     int number;
  42
  43     /* The initial value of a variable is a 64-bit signed integer.  */
  44     LONGEST initial_value;
  45
  46     /* 1 if the value is known, else 0.  The value is known during a
  47        trace run, or in tfind mode if the variable was collected into
  48        the current trace frame.  */
  49     int value_known;
  50
  51     /* The value of a variable is a 64-bit signed integer.  */
  52     LONGEST value;
  53
  54     /* This is true for variables that are predefined and built into
  55        the target.  */
  56     int builtin;
  57    };
  58
  59 /* The trace status encompasses various info about the general state
  60    of the tracing run.  */
  61
  62 enum trace_stop_reason
  63   {
  64     trace_stop_reason_unknown,
  65     trace_never_run,
  66     tstop_command,
  67     trace_buffer_full,
  68     trace_disconnected,
  69     tracepoint_passcount,
  70     tracepoint_error
  71   };
  72
  73 struct trace_status
  74 {
  75   /* This is true if the status is coming from a file rather
  76      than a live target.  */
  77   int from_file;
  78
  79   /* This is true if the value of the running field is known.  */
  80   int running_known;
  81
  82   /* This is true when the trace experiment is actually running.  */
  83   int running;
  84
  85   enum trace_stop_reason stop_reason;
  86
  87   /* If stop_reason is tracepoint_passcount or tracepoint_error, this
  88      is the (on-target) number of the tracepoint which caused the
  89      stop.  */
  90   int stopping_tracepoint;
  91
  92   /* If stop_reason is tstop_command or tracepoint_error, this is an
  93      arbitrary string that may describe the reason for the stop in
  94      more detail.  */
  95
  96   char *stop_desc;
  97
  98   /* Number of traceframes currently in the buffer.  */
  99
 100   int traceframe_count;
 101
 102   /* Number of traceframes created since start of run.  */
 103
 104   int traceframes_created;
 105
 106   /* Total size of the target's trace buffer.  */
 107
 108   int buffer_size;
 109
 110   /* Unused bytes left in the target's trace buffer.  */
 111
 112   int buffer_free;
 113
 114   /* 1 if the target will continue tracing after disconnection, else
 115      0.  If the target does not report a value, assume 0.  */
 116
 117   int disconnected_tracing;
 118
 119   /* 1 if the target is using a circular trace buffer, else 0.  If the
 120      target does not report a value, assume 0.  */
 121
 122   int circular_buffer;
 123
 124   /* The "name" of the person running the trace.  This is an
 125      arbitrary string.  */
 126
 127   char *user_name;
 128
 129   /* "Notes" about the trace.  This is an arbitrary string not
 130      interpreted by GDBserver in any special way.  */
 131
 132   char *notes;
 133
 134   /* The calendar times at which the trace run started and stopped,
 135      both expressed in microseconds of Unix time.  */
 136
 137   LONGEST start_time;
 138   LONGEST stop_time;
 139 };
 140
 141 struct trace_status *current_trace_status (void);
 142
 143 extern char *default_collect;
 144
 145 /* Struct to collect random info about tracepoints on the target.  */
 146
 147 struct uploaded_tp
 148 {
 149   int number;
 150   enum bptype type;
 151   ULONGEST addr;
 152   int enabled;
 153   int step;
 154   int pass;
 155   int orig_size;
 156
 157   /* String that is the encoded form of the tracepoint's condition.  */
 158   char *cond;
 159
 160   /* Vectors of strings that are the encoded forms of a tracepoint's
 161      actions.  */
 162   VEC(char_ptr) *actions;
 163   VEC(char_ptr) *step_actions;
 164
 165   /* The original string defining the location of the tracepoint.  */
 166   char *at_string;
 167
 168   /* The original string defining the tracepoint's condition.  */
 169   char *cond_string;
 170
 171   /* List of original strings defining the tracepoint's actions.  */
 172   VEC(char_ptr) *cmd_strings;
 173
 174   /* The tracepoint's current hit count.  */
 175   int hit_count;
 176
 177   /* The tracepoint's current traceframe usage.  */
 178   ULONGEST traceframe_usage;
 179
 180   struct uploaded_tp *next;
 181 };
 182
 183 /* Struct recording info about trace state variables on the target.  */
 184
 185 struct uploaded_tsv
 186 {
 187   const char *name;
 188   int number;
 189   LONGEST initial_value;
 190   int builtin;
 191   struct uploaded_tsv *next;
 192 };
 193
 194 /* Struct recording info about a target static tracepoint marker.  */
 195
 196 struct static_tracepoint_marker
 197 {
 198   struct gdbarch *gdbarch;
 199   CORE_ADDR address;
 200
 201   /* The string ID of the marker.  */
 202   char *str_id;
 203
 204   /* Extra target reported info associated with the marker.  */
 205   char *extra;
 206 };
 207
 208 extern void parse_static_tracepoint_marker_definition
 209   (char *line, char **pp,
 210    struct static_tracepoint_marker *marker);
 211 extern void release_static_tracepoint_marker (struct static_tracepoint_marker *);
 212 extern void free_current_marker (void *arg);
 213
 214 /* A hook used to notify the UI of tracepoint operations.  */
 215
 216 extern void (*deprecated_trace_find_hook) (char *arg, int from_tty);
 217 extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty);
 218
 219 /* Returns the current traceframe number.  */
 220 extern int get_traceframe_number (void);
 221
 222 /* Make the traceframe NUM be the current GDB trace frame number, and
 223    do nothing more.  In particular, this does not flush the
 224    register/frame caches or notify the target about the trace frame
 225    change, so that is can be used when we need to momentarily access
 226    live memory.  Targets lazily switch their current traceframe to
 227    match GDB's traceframe number, at the appropriate times.  */
 228 extern void set_traceframe_number (int);
 229
 230 /* Make the traceframe NUM be the current trace frame, all the way to
 231    the target, and flushes all global state (register/frame caches,
 232    etc.).  */
 233 extern void set_current_traceframe (int num);
 234
 235 struct cleanup *make_cleanup_restore_current_traceframe (void);
 236 struct cleanup *make_cleanup_restore_traceframe_number (void);
 237
 238 void free_actions (struct breakpoint *);
 239
 240 extern char *decode_agent_options (char *exp);
 241
 242 extern void encode_actions (struct breakpoint *t, struct bp_location *tloc,
 243                             char ***tdp_actions, char ***stepping_actions);
 244
 245 extern void validate_actionline (char **, struct breakpoint *);
 246
 247 extern void end_actions_pseudocommand (char *args, int from_tty);
 248 extern void while_stepping_pseudocommand (char *args, int from_tty);
 249
 250 extern struct trace_state_variable *find_trace_state_variable (const char *name);
 251 extern struct trace_state_variable *create_trace_state_variable (const char *name);
 252
 253 extern int encode_source_string (int num, ULONGEST addr,
 254                                  char *srctype, char *src,
 255                                  char *buf, int buf_size);
 256
 257 extern void parse_trace_status (char *line, struct trace_status *ts);
 258
 259 extern void parse_tracepoint_status (char *p, struct breakpoint *tp,
 260                                      struct uploaded_tp *utp);
 261
 262 extern void parse_tracepoint_definition (char *line,
 263                                          struct uploaded_tp **utpp);
 264 extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp);
 265
 266 extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr,
 267                                             struct uploaded_tp **utpp);
 268 extern struct tracepoint *create_tracepoint_from_upload (struct uploaded_tp *utp);
 269 extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp);
 270 extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp);
 271
 272 extern void disconnect_tracing (int from_tty);
 273
 274 extern void start_tracing (char *notes);
 275 extern void stop_tracing (char *notes);
 276
 277 extern void trace_status_mi (int on_stop);
 278
 279 extern void tvariables_info_1 (void);
 280 extern void save_trace_state_variables (struct ui_file *fp);
 281
 282 extern void tfind_1 (enum trace_find_type type, int num,
 283                      ULONGEST addr1, ULONGEST addr2,
 284                      int from_tty);
 285
 286 extern void trace_save (const char *filename, int target_does_save);
 287
 288 extern struct traceframe_info *parse_traceframe_info (const char *tframe_info);
 289
 290 extern int traceframe_available_memory (VEC(mem_range_s) **result,
 291                                         CORE_ADDR memaddr, ULONGEST len);
 292
 293 #endif  /* TRACEPOINT_H */