gdb/tracepoint.h

   1 /* Data structures associated with tracepoints in GDB.
   2    Copyright (C) 1997, 1998, 1999, 2000, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #if !defined (TRACEPOINT_H)
  21 #define TRACEPOINT_H 1
  22
  23 #include "breakpoint.h"
  24 #include "target.h"
  25 #include "memrange.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 DEF_VEC_P (char_ptr);
 148
 149 struct uploaded_tp
 150 {
 151   int number;
 152   enum bptype type;
 153   ULONGEST addr;
 154   int enabled;
 155   int step;
 156   int pass;
 157   int orig_size;
 158
 159   /* String that is the encoded form of the tracepoint's condition.  */
 160   char *cond;
 161
 162   /* Vectors of strings that are the encoded forms of a tracepoint's
 163      actions.  */
 164   VEC(char_ptr) *actions;
 165   VEC(char_ptr) *step_actions;
 166
 167   /* The original string defining the location of the tracepoint.  */
 168   char *at_string;
 169
 170   /* The original string defining the tracepoint's condition.  */
 171   char *cond_string;
 172
 173   /* List of original strings defining the tracepoint's actions.  */
 174   VEC(char_ptr) *cmd_strings;
 175
 176   /* The tracepoint's current hit count.  */
 177   int hit_count;
 178
 179   /* The tracepoint's current traceframe usage.  */
 180   ULONGEST traceframe_usage;
 181
 182   struct uploaded_tp *next;
 183 };
 184
 185 /* Struct recording info about trace state variables on the target.  */
 186
 187 struct uploaded_tsv
 188 {
 189   const char *name;
 190   int number;
 191   LONGEST initial_value;
 192   int builtin;
 193   struct uploaded_tsv *next;
 194 };
 195
 196 /* Struct recording info about a target static tracepoint marker.  */
 197
 198 struct static_tracepoint_marker
 199 {
 200   struct gdbarch *gdbarch;
 201   CORE_ADDR address;
 202
 203   /* The string ID of the marker.  */
 204   char *str_id;
 205
 206   /* Extra target reported info associated with the marker.  */
 207   char *extra;
 208 };
 209
 210 extern void parse_static_tracepoint_marker_definition
 211   (char *line, char **pp,
 212    struct static_tracepoint_marker *marker);
 213 extern void release_static_tracepoint_marker (struct static_tracepoint_marker *);
 214
 215 /* A hook used to notify the UI of tracepoint operations.  */
 216
 217 extern void (*deprecated_trace_find_hook) (char *arg, int from_tty);
 218 extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty);
 219
 220 /* Returns the current traceframe number.  */
 221 extern int get_traceframe_number (void);
 222
 223 /* Make the traceframe NUM be the current GDB trace frame number, and
 224    do nothing more.  In particular, this does not flush the
 225    register/frame caches or notify the target about the trace frame
 226    change, so that is can be used when we need to momentarily access
 227    live memory.  Targets lazily switch their current traceframe to
 228    match GDB's traceframe number, at the appropriate times.  */
 229 extern void set_traceframe_number (int);
 230
 231 /* Make the traceframe NUM be the current trace frame, all the way to
 232    the target, and flushes all global state (register/frame caches,
 233    etc.).  */
 234 extern void set_current_traceframe (int num);
 235
 236 struct cleanup *make_cleanup_restore_current_traceframe (void);
 237 struct cleanup *make_cleanup_restore_traceframe_number (void);
 238
 239 void free_actions (struct breakpoint *);
 240
 241 extern char *decode_agent_options (char *exp);
 242
 243 extern void validate_actionline (char **, struct breakpoint *);
 244
 245 extern void end_actions_pseudocommand (char *args, int from_tty);
 246 extern void while_stepping_pseudocommand (char *args, int from_tty);
 247
 248 extern struct trace_state_variable *find_trace_state_variable (const char *name);
 249 extern struct trace_state_variable *create_trace_state_variable (const char *name);
 250
 251 extern int encode_source_string (int num, ULONGEST addr,
 252                                  char *srctype, char *src,
 253                                  char *buf, int buf_size);
 254
 255 extern void parse_trace_status (char *line, struct trace_status *ts);
 256
 257 extern void parse_tracepoint_status (char *p, struct breakpoint *tp,
 258                                      struct uploaded_tp *utp);
 259
 260 extern void parse_tracepoint_definition (char *line,
 261                                          struct uploaded_tp **utpp);
 262 extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp);
 263
 264 extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr,
 265                                             struct uploaded_tp **utpp);
 266 extern struct tracepoint *create_tracepoint_from_upload (struct uploaded_tp *utp);
 267 extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp);
 268 extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp);
 269
 270 extern void disconnect_tracing (int from_tty);
 271
 272 extern void start_tracing (char *notes);
 273 extern void stop_tracing (char *notes);
 274
 275 extern void trace_status_mi (int on_stop);
 276
 277 extern void tvariables_info_1 (void);
 278 extern void save_trace_state_variables (struct ui_file *fp);
 279
 280 extern void tfind_1 (enum trace_find_type type, int num,
 281                      ULONGEST addr1, ULONGEST addr2,
 282                      int from_tty);
 283
 284 extern void trace_save (const char *filename, int target_does_save);
 285
 286 extern struct traceframe_info *parse_traceframe_info (const char *tframe_info);
 287
 288 extern int traceframe_available_memory (VEC(mem_range_s) **result,
 289                                         CORE_ADDR memaddr, ULONGEST len);
 290
 291 #endif  /* TRACEPOINT_H */