gdb/gdb-events.c

   1 /* User Interface Events.
   2
   3    Copyright 1999, 2001, 2002 Free Software Foundation, Inc.
   4
   5    Contributed by Cygnus Solutions.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 /* Work in progress */
  24
  25 /* This file was created with the aid of ``gdb-events.sh''.
  26
  27    The bourn shell script ``gdb-events.sh'' creates the files
  28    ``new-gdb-events.c'' and ``new-gdb-events.h and then compares
  29    them against the existing ``gdb-events.[hc]''.  Any differences
  30    found being reported.
  31
  32    If editing this file, please also run gdb-events.sh and merge any
  33    changes into that script. Conversely, when making sweeping changes
  34    to this file, modifying gdb-events.sh and using its output may
  35    prove easier. */
  36
  37
  38 #include "defs.h"
  39 #include "gdb-events.h"
  40 #include "gdbcmd.h"
  41
  42 #if WITH_GDB_EVENTS
  43 static struct gdb_events null_event_hooks;
  44 static struct gdb_events queue_event_hooks;
  45 static struct gdb_events *current_event_hooks = &null_event_hooks;
  46 #endif
  47
  48 int gdb_events_debug;
  49
  50 #if WITH_GDB_EVENTS
  51
  52 void
  53 breakpoint_create_event (int b)
  54 {
  55   if (gdb_events_debug)
  56     fprintf_unfiltered (gdb_stdlog, "breakpoint_create_event\n");
  57   if (!current_event_hooks->breakpoint_create)
  58     return;
  59   current_event_hooks->breakpoint_create (b);
  60 }
  61
  62 void
  63 breakpoint_delete_event (int b)
  64 {
  65   if (gdb_events_debug)
  66     fprintf_unfiltered (gdb_stdlog, "breakpoint_delete_event\n");
  67   if (!current_event_hooks->breakpoint_delete)
  68     return;
  69   current_event_hooks->breakpoint_delete (b);
  70 }
  71
  72 void
  73 breakpoint_modify_event (int b)
  74 {
  75   if (gdb_events_debug)
  76     fprintf_unfiltered (gdb_stdlog, "breakpoint_modify_event\n");
  77   if (!current_event_hooks->breakpoint_modify)
  78     return;
  79   current_event_hooks->breakpoint_modify (b);
  80 }
  81
  82 void
  83 tracepoint_create_event (int number)
  84 {
  85   if (gdb_events_debug)
  86     fprintf_unfiltered (gdb_stdlog, "tracepoint_create_event\n");
  87   if (!current_event_hooks->tracepoint_create)
  88     return;
  89   current_event_hooks->tracepoint_create (number);
  90 }
  91
  92 void
  93 tracepoint_delete_event (int number)
  94 {
  95   if (gdb_events_debug)
  96     fprintf_unfiltered (gdb_stdlog, "tracepoint_delete_event\n");
  97   if (!current_event_hooks->tracepoint_delete)
  98     return;
  99   current_event_hooks->tracepoint_delete (number);
 100 }
 101
 102 void
 103 tracepoint_modify_event (int number)
 104 {
 105   if (gdb_events_debug)
 106     fprintf_unfiltered (gdb_stdlog, "tracepoint_modify_event\n");
 107   if (!current_event_hooks->tracepoint_modify)
 108     return;
 109   current_event_hooks->tracepoint_modify (number);
 110 }
 111
 112 void
 113 architecture_changed_event (void)
 114 {
 115   if (gdb_events_debug)
 116     fprintf_unfiltered (gdb_stdlog, "architecture_changed_event\n");
 117   if (!current_event_hooks->architecture_changed)
 118     return;
 119   current_event_hooks->architecture_changed ();
 120 }
 121
 122 void
 123 target_changed_event (void)
 124 {
 125   if (gdb_events_debug)
 126     fprintf_unfiltered (gdb_stdlog, "target_changed_event\n");
 127   if (!current_event_hooks->target_changed)
 128     return;
 129   current_event_hooks->target_changed ();
 130 }
 131
 132 void
 133 selected_frame_level_changed_event (int level)
 134 {
 135   if (gdb_events_debug)
 136     fprintf_unfiltered (gdb_stdlog, "selected_frame_level_changed_event\n");
 137   if (!current_event_hooks->selected_frame_level_changed)
 138     return;
 139   current_event_hooks->selected_frame_level_changed (level);
 140 }
 141
 142 #endif
 143
 144 #if WITH_GDB_EVENTS
 145 struct gdb_events *
 146 set_gdb_event_hooks (struct gdb_events *vector)
 147 {
 148   struct gdb_events *old_events = current_event_hooks;
 149   if (vector == NULL)
 150     current_event_hooks = &queue_event_hooks;
 151   else
 152     current_event_hooks = vector;
 153   return old_events;
 154 }
 155 #endif
 156
 157 #if WITH_GDB_EVENTS
 158 void
 159 clear_gdb_event_hooks (void)
 160 {
 161   set_gdb_event_hooks (&null_event_hooks);
 162 }
 163 #endif
 164
 165 enum gdb_event
 166 {
 167   breakpoint_create,
 168   breakpoint_delete,
 169   breakpoint_modify,
 170   tracepoint_create,
 171   tracepoint_delete,
 172   tracepoint_modify,
 173   architecture_changed,
 174   target_changed,
 175   selected_frame_level_changed,
 176   nr_gdb_events
 177 };
 178
 179 struct breakpoint_create
 180   {
 181     int b;
 182   };
 183
 184 struct breakpoint_delete
 185   {
 186     int b;
 187   };
 188
 189 struct breakpoint_modify
 190   {
 191     int b;
 192   };
 193
 194 struct tracepoint_create
 195   {
 196     int number;
 197   };
 198
 199 struct tracepoint_delete
 200   {
 201     int number;
 202   };
 203
 204 struct tracepoint_modify
 205   {
 206     int number;
 207   };
 208
 209 struct selected_frame_level_changed
 210   {
 211     int level;
 212   };
 213
 214 struct event
 215   {
 216     enum gdb_event type;
 217     struct event *next;
 218     union
 219       {
 220         struct breakpoint_create breakpoint_create;
 221         struct breakpoint_delete breakpoint_delete;
 222         struct breakpoint_modify breakpoint_modify;
 223         struct tracepoint_create tracepoint_create;
 224         struct tracepoint_delete tracepoint_delete;
 225         struct tracepoint_modify tracepoint_modify;
 226         struct selected_frame_level_changed selected_frame_level_changed;
 227       }
 228     data;
 229   };
 230 struct event *pending_events;
 231 struct event *delivering_events;
 232
 233 static void
 234 append (struct event *new_event)
 235 {
 236   struct event **event = &pending_events;
 237   while ((*event) != NULL)
 238     event = &((*event)->next);
 239   (*event) = new_event;
 240   (*event)->next = NULL;
 241 }
 242
 243 static void
 244 queue_breakpoint_create (int b)
 245 {
 246   struct event *event = XMALLOC (struct event);
 247   event->type = breakpoint_create;
 248   event->data.breakpoint_create.b = b;
 249   append (event);
 250 }
 251
 252 static void
 253 queue_breakpoint_delete (int b)
 254 {
 255   struct event *event = XMALLOC (struct event);
 256   event->type = breakpoint_delete;
 257   event->data.breakpoint_delete.b = b;
 258   append (event);
 259 }
 260
 261 static void
 262 queue_breakpoint_modify (int b)
 263 {
 264   struct event *event = XMALLOC (struct event);
 265   event->type = breakpoint_modify;
 266   event->data.breakpoint_modify.b = b;
 267   append (event);
 268 }
 269
 270 static void
 271 queue_tracepoint_create (int number)
 272 {
 273   struct event *event = XMALLOC (struct event);
 274   event->type = tracepoint_create;
 275   event->data.tracepoint_create.number = number;
 276   append (event);
 277 }
 278
 279 static void
 280 queue_tracepoint_delete (int number)
 281 {
 282   struct event *event = XMALLOC (struct event);
 283   event->type = tracepoint_delete;
 284   event->data.tracepoint_delete.number = number;
 285   append (event);
 286 }
 287
 288 static void
 289 queue_tracepoint_modify (int number)
 290 {
 291   struct event *event = XMALLOC (struct event);
 292   event->type = tracepoint_modify;
 293   event->data.tracepoint_modify.number = number;
 294   append (event);
 295 }
 296
 297 static void
 298 queue_architecture_changed (void)
 299 {
 300   struct event *event = XMALLOC (struct event);
 301   event->type = architecture_changed;
 302   append (event);
 303 }
 304
 305 static void
 306 queue_target_changed (void)
 307 {
 308   struct event *event = XMALLOC (struct event);
 309   event->type = target_changed;
 310   append (event);
 311 }
 312
 313 static void
 314 queue_selected_frame_level_changed (int level)
 315 {
 316   struct event *event = XMALLOC (struct event);
 317   event->type = selected_frame_level_changed;
 318   event->data.selected_frame_level_changed.level = level;
 319   append (event);
 320 }
 321
 322 void
 323 gdb_events_deliver (struct gdb_events *vector)
 324 {
 325   /* Just zap any events left around from last time. */
 326   while (delivering_events != NULL)
 327     {
 328       struct event *event = delivering_events;
 329       delivering_events = event->next;
 330       xfree (event);
 331     }
 332   /* Process any pending events.  Because one of the deliveries could
 333      bail out we move everything off of the pending queue onto an
 334      in-progress queue where it can, later, be cleaned up if
 335      necessary. */
 336   delivering_events = pending_events;
 337   pending_events = NULL;
 338   while (delivering_events != NULL)
 339     {
 340       struct event *event = delivering_events;
 341       switch (event->type)
 342         {
 343         case breakpoint_create:
 344           vector->breakpoint_create
 345             (event->data.breakpoint_create.b);
 346           break;
 347         case breakpoint_delete:
 348           vector->breakpoint_delete
 349             (event->data.breakpoint_delete.b);
 350           break;
 351         case breakpoint_modify:
 352           vector->breakpoint_modify
 353             (event->data.breakpoint_modify.b);
 354           break;
 355         case tracepoint_create:
 356           vector->tracepoint_create
 357             (event->data.tracepoint_create.number);
 358           break;
 359         case tracepoint_delete:
 360           vector->tracepoint_delete
 361             (event->data.tracepoint_delete.number);
 362           break;
 363         case tracepoint_modify:
 364           vector->tracepoint_modify
 365             (event->data.tracepoint_modify.number);
 366           break;
 367         case architecture_changed:
 368           vector->architecture_changed ();
 369           break;
 370         case target_changed:
 371           vector->target_changed ();
 372           break;
 373         case selected_frame_level_changed:
 374           vector->selected_frame_level_changed
 375             (event->data.selected_frame_level_changed.level);
 376           break;
 377         }
 378       delivering_events = event->next;
 379       xfree (event);
 380     }
 381 }
 382
 383 void _initialize_gdb_events (void);
 384 void
 385 _initialize_gdb_events (void)
 386 {
 387   struct cmd_list_element *c;
 388 #if WITH_GDB_EVENTS
 389   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 390   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 391   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 392   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 393   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 394   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 395   queue_event_hooks.architecture_changed = queue_architecture_changed;
 396   queue_event_hooks.target_changed = queue_target_changed;
 397   queue_event_hooks.selected_frame_level_changed = queue_selected_frame_level_changed;
 398 #endif
 399
 400   c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger,
 401                    (char *) (&gdb_events_debug), "Set event debugging.\n\
 402 When non-zero, event/notify debugging is enabled.", &setlist);
 403   deprecate_cmd (c, "set debug event");
 404   deprecate_cmd (add_show_from_set (c, &showlist), "show debug event");
 405
 406   add_show_from_set (add_set_cmd ("event",
 407                                   class_maintenance,
 408                                   var_zinteger,
 409                                   (char *) (&gdb_events_debug),
 410                                   "Set event debugging.\n\
 411 When non-zero, event/notify debugging is enabled.", &setdebuglist),
 412                      &showdebuglist);
 413 }