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
  26 /* A trace state variable is a value managed by a target being
  27    traced. A trace state variable (or tsv for short) can be accessed
  28    and assigned to by tracepoint actions and conditionals, but is not
  29    part of the program being traced, and it doesn't have to be
  30    collected. Effectively the variables are scratch space for
  31    tracepoints.  */
  32
  33 struct trace_state_variable
  34   {
  35     /* The variable's name.  The user has to prefix with a dollar sign,
  36        but we don't store that internally.  */
  37     const char *name;
  38
  39     /* An id number assigned by GDB, and transmitted to targets.  */
  40     int number;
  41
  42     /* The initial value of a variable is a 64-bit signed integer.  */
  43     LONGEST initial_value;
  44
  45     /* 1 if the value is known, else 0.  The value is known during a
  46        trace run, or in tfind mode if the variable was collected into
  47        the current trace frame.  */
  48     int value_known;
  49
  50     /* The value of a variable is a 64-bit signed integer.  */
  51     LONGEST value;
  52
  53     /* This is true for variables that are predefined and built into
  54        the target.  */
  55     int builtin;
  56    };
  57
  58 /* The trace status encompasses various info about the general state
  59    of the tracing run.  */
  60
  61 enum trace_stop_reason
  62   {
  63     trace_stop_reason_unknown,
  64     trace_never_run,
  65     tstop_command,
  66     trace_buffer_full,
  67     trace_disconnected,
  68     tracepoint_passcount,
  69     tracepoint_error
  70   };
  71
  72 struct trace_status
  73 {
  74   /* This is true if the status is coming from a file rather
  75      than a live target.  */
  76   int from_file;
  77
  78   /* This is true if the value of the running field is known.  */
  79   int running_known;
  80
  81   int running;
  82
  83   enum trace_stop_reason stop_reason;
  84
  85   /* If stop_reason is tracepoint_passcount or tracepoint_error, this
  86      is the (on-target) number of the tracepoint which caused the
  87      stop.  */
  88   int stopping_tracepoint;
  89
  90   /* If stop_reason is tracepoint_error, this is a human-readable
  91      string that describes the error that happened on the target.  */
  92   char *error_desc;
  93
  94   /* Number of traceframes currently in the buffer.  */
  95
  96   int traceframe_count;
  97
  98   /* Number of traceframes created since start of run.  */
  99
 100   int traceframes_created;
 101
 102   /* Total size of the target's trace buffer.  */
 103
 104   int buffer_size;
 105
 106   /* Unused bytes left in the target's trace buffer.  */
 107
 108   int buffer_free;
 109
 110   /* 1 if the target will continue tracing after disconnection, else
 111      0.  If the target does not report a value, assume 0.  */
 112
 113   int disconnected_tracing;
 114
 115   /* 1 if the target is using a circular trace buffer, else 0.  If the
 116      target does not report a value, assume 0.  */
 117
 118   int circular_buffer;
 119 };
 120
 121 struct trace_status *current_trace_status (void);
 122
 123 extern char *default_collect;
 124
 125 /* Struct to collect random info about tracepoints on the target.  */
 126
 127 DEF_VEC_P (char_ptr);
 128
 129 struct uploaded_tp
 130 {
 131   int number;
 132   enum bptype type;
 133   ULONGEST addr;
 134   int enabled;
 135   int step;
 136   int pass;
 137   int orig_size;
 138
 139   /* String that is the encoded form of the tracepoint's condition.  */
 140   char *cond;
 141
 142   /* Vectors of strings that are the encoded forms of a tracepoint's
 143      actions.  */
 144   VEC(char_ptr) *actions;
 145   VEC(char_ptr) *step_actions;
 146
 147   /* The original string defining the location of the tracepoint.  */
 148   char *at_string;
 149
 150   /* The original string defining the tracepoint's condition.  */
 151   char *cond_string;
 152
 153   /* List of original strings defining the tracepoint's actions.  */
 154   VEC(char_ptr) *cmd_strings;
 155
 156   struct uploaded_tp *next;
 157 };
 158
 159 /* Struct recording info about trace state variables on the target.  */
 160
 161 struct uploaded_tsv
 162 {
 163   const char *name;
 164   int number;
 165   LONGEST initial_value;
 166   int builtin;
 167   struct uploaded_tsv *next;
 168 };
 169
 170 /* Struct recording info about a target static tracepoint marker.  */
 171
 172 struct static_tracepoint_marker
 173 {
 174   struct gdbarch *gdbarch;
 175   CORE_ADDR address;
 176
 177   /* The string ID of the marker.  */
 178   char *str_id;
 179
 180   /* Extra target reported info associated with the marker.  */
 181   char *extra;
 182 };
 183
 184 extern void parse_static_tracepoint_marker_definition
 185   (char *line, char **pp,
 186    struct static_tracepoint_marker *marker);
 187 extern void release_static_tracepoint_marker (struct static_tracepoint_marker *);
 188
 189 /* A hook used to notify the UI of tracepoint operations.  */
 190
 191 extern void (*deprecated_trace_find_hook) (char *arg, int from_tty);
 192 extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty);
 193
 194 int get_traceframe_number (void);
 195 void set_traceframe_number (int);
 196 struct cleanup *make_cleanup_restore_current_traceframe (void);
 197
 198 void free_actions (struct breakpoint *);
 199 extern void validate_actionline (char **, struct breakpoint *);
 200
 201 extern void end_actions_pseudocommand (char *args, int from_tty);
 202 extern void while_stepping_pseudocommand (char *args, int from_tty);
 203
 204 extern struct trace_state_variable *find_trace_state_variable (const char *name);
 205 extern struct trace_state_variable *create_trace_state_variable (const char *name);
 206
 207 extern int encode_source_string (int num, ULONGEST addr,
 208                                  char *srctype, char *src,
 209                                  char *buf, int buf_size);
 210
 211 extern void parse_trace_status (char *line, struct trace_status *ts);
 212
 213 extern void parse_tracepoint_definition (char *line,
 214                                          struct uploaded_tp **utpp);
 215 extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp);
 216
 217 extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr,
 218                                             struct uploaded_tp **utpp);
 219 extern struct breakpoint *create_tracepoint_from_upload (struct uploaded_tp *utp);
 220 extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp);
 221 extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp);
 222
 223 extern void disconnect_tracing (int from_tty);
 224
 225 extern void start_tracing (void);
 226 extern void stop_tracing (void);
 227
 228 extern void trace_status_mi (int on_stop);
 229
 230 extern void tvariables_info_1 (void);
 231 extern void save_trace_state_variables (struct ui_file *fp);
 232
 233 extern void tfind_1 (enum trace_find_type type, int num,
 234                      ULONGEST addr1, ULONGEST addr2,
 235                      int from_tty);
 236
 237 extern void trace_save (const char *filename, int target_does_save);
 238
 239 #endif  /* TRACEPOINT_H */