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 void
 143 selected_thread_changed_event (int thread_num)
 144 {
 145   if (gdb_events_debug)
 146     fprintf_unfiltered (gdb_stdlog, "selected_thread_changed_event\n");
 147   if (!current_event_hooks->selected_thread_changed)
 148     return;
 149   current_event_hooks->selected_thread_changed (thread_num);
 150 }
 151
 152 #endif
 153
 154 #if WITH_GDB_EVENTS
 155 struct gdb_events *
 156 set_gdb_event_hooks (struct gdb_events *vector)
 157 {
 158   struct gdb_events *old_events = current_event_hooks;
 159   if (vector == NULL)
 160     current_event_hooks = &queue_event_hooks;
 161   else
 162     current_event_hooks = vector;
 163   return old_events;
 164 }
 165 #endif
 166
 167 #if WITH_GDB_EVENTS
 168 void
 169 clear_gdb_event_hooks (void)
 170 {
 171   set_gdb_event_hooks (&null_event_hooks);
 172 }
 173 #endif
 174
 175 enum gdb_event
 176 {
 177   breakpoint_create,
 178   breakpoint_delete,
 179   breakpoint_modify,
 180   tracepoint_create,
 181   tracepoint_delete,
 182   tracepoint_modify,
 183   architecture_changed,
 184   target_changed,
 185   selected_frame_level_changed,
 186   selected_thread_changed,
 187   nr_gdb_events
 188 };
 189
 190 struct breakpoint_create
 191   {
 192     int b;
 193   };
 194
 195 struct breakpoint_delete
 196   {
 197     int b;
 198   };
 199
 200 struct breakpoint_modify
 201   {
 202     int b;
 203   };
 204
 205 struct tracepoint_create
 206   {
 207     int number;
 208   };
 209
 210 struct tracepoint_delete
 211   {
 212     int number;
 213   };
 214
 215 struct tracepoint_modify
 216   {
 217     int number;
 218   };
 219
 220 struct selected_frame_level_changed
 221   {
 222     int level;
 223   };
 224
 225 struct selected_thread_changed
 226   {
 227     int thread_num;
 228   };
 229
 230 struct event
 231   {
 232     enum gdb_event type;
 233     struct event *next;
 234     union
 235       {
 236         struct breakpoint_create breakpoint_create;
 237         struct breakpoint_delete breakpoint_delete;
 238         struct breakpoint_modify breakpoint_modify;
 239         struct tracepoint_create tracepoint_create;
 240         struct tracepoint_delete tracepoint_delete;
 241         struct tracepoint_modify tracepoint_modify;
 242         struct selected_frame_level_changed selected_frame_level_changed;
 243         struct selected_thread_changed selected_thread_changed;
 244       }
 245     data;
 246   };
 247 struct event *pending_events;
 248 struct event *delivering_events;
 249
 250 static void
 251 append (struct event *new_event)
 252 {
 253   struct event **event = &pending_events;
 254   while ((*event) != NULL)
 255     event = &((*event)->next);
 256   (*event) = new_event;
 257   (*event)->next = NULL;
 258 }
 259
 260 static void
 261 queue_breakpoint_create (int b)
 262 {
 263   struct event *event = XMALLOC (struct event);
 264   event->type = breakpoint_create;
 265   event->data.breakpoint_create.b = b;
 266   append (event);
 267 }
 268
 269 static void
 270 queue_breakpoint_delete (int b)
 271 {
 272   struct event *event = XMALLOC (struct event);
 273   event->type = breakpoint_delete;
 274   event->data.breakpoint_delete.b = b;
 275   append (event);
 276 }
 277
 278 static void
 279 queue_breakpoint_modify (int b)
 280 {
 281   struct event *event = XMALLOC (struct event);
 282   event->type = breakpoint_modify;
 283   event->data.breakpoint_modify.b = b;
 284   append (event);
 285 }
 286
 287 static void
 288 queue_tracepoint_create (int number)
 289 {
 290   struct event *event = XMALLOC (struct event);
 291   event->type = tracepoint_create;
 292   event->data.tracepoint_create.number = number;
 293   append (event);
 294 }
 295
 296 static void
 297 queue_tracepoint_delete (int number)
 298 {
 299   struct event *event = XMALLOC (struct event);
 300   event->type = tracepoint_delete;
 301   event->data.tracepoint_delete.number = number;
 302   append (event);
 303 }
 304
 305 static void
 306 queue_tracepoint_modify (int number)
 307 {
 308   struct event *event = XMALLOC (struct event);
 309   event->type = tracepoint_modify;
 310   event->data.tracepoint_modify.number = number;
 311   append (event);
 312 }
 313
 314 static void
 315 queue_architecture_changed (void)
 316 {
 317   struct event *event = XMALLOC (struct event);
 318   event->type = architecture_changed;
 319   append (event);
 320 }
 321
 322 static void
 323 queue_target_changed (void)
 324 {
 325   struct event *event = XMALLOC (struct event);
 326   event->type = target_changed;
 327   append (event);
 328 }
 329
 330 static void
 331 queue_selected_frame_level_changed (int level)
 332 {
 333   struct event *event = XMALLOC (struct event);
 334   event->type = selected_frame_level_changed;
 335   event->data.selected_frame_level_changed.level = level;
 336   append (event);
 337 }
 338
 339 static void
 340 queue_selected_thread_changed (int thread_num)
 341 {
 342   struct event *event = XMALLOC (struct event);
 343   event->type = selected_thread_changed;
 344   event->data.selected_thread_changed.thread_num = thread_num;
 345   append (event);
 346 }
 347
 348 void
 349 gdb_events_deliver (struct gdb_events *vector)
 350 {
 351   /* Just zap any events left around from last time. */
 352   while (delivering_events != NULL)
 353     {
 354       struct event *event = delivering_events;
 355       delivering_events = event->next;
 356       xfree (event);
 357     }
 358   /* Process any pending events.  Because one of the deliveries could
 359      bail out we move everything off of the pending queue onto an
 360      in-progress queue where it can, later, be cleaned up if
 361      necessary. */
 362   delivering_events = pending_events;
 363   pending_events = NULL;
 364   while (delivering_events != NULL)
 365     {
 366       struct event *event = delivering_events;
 367       switch (event->type)
 368         {
 369         case breakpoint_create:
 370           vector->breakpoint_create
 371             (event->data.breakpoint_create.b);
 372           break;
 373         case breakpoint_delete:
 374           vector->breakpoint_delete
 375             (event->data.breakpoint_delete.b);
 376           break;
 377         case breakpoint_modify:
 378           vector->breakpoint_modify
 379             (event->data.breakpoint_modify.b);
 380           break;
 381         case tracepoint_create:
 382           vector->tracepoint_create
 383             (event->data.tracepoint_create.number);
 384           break;
 385         case tracepoint_delete:
 386           vector->tracepoint_delete
 387             (event->data.tracepoint_delete.number);
 388           break;
 389         case tracepoint_modify:
 390           vector->tracepoint_modify
 391             (event->data.tracepoint_modify.number);
 392           break;
 393         case architecture_changed:
 394           vector->architecture_changed ();
 395           break;
 396         case target_changed:
 397           vector->target_changed ();
 398           break;
 399         case selected_frame_level_changed:
 400           vector->selected_frame_level_changed
 401             (event->data.selected_frame_level_changed.level);
 402           break;
 403         case selected_thread_changed:
 404           vector->selected_thread_changed
 405             (event->data.selected_thread_changed.thread_num);
 406           break;
 407         }
 408       delivering_events = event->next;
 409       xfree (event);
 410     }
 411 }
 412
 413 void _initialize_gdb_events (void);
 414 void
 415 _initialize_gdb_events (void)
 416 {
 417   struct cmd_list_element *c;
 418 #if WITH_GDB_EVENTS
 419   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 420   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 421   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 422   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 423   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 424   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 425   queue_event_hooks.architecture_changed = queue_architecture_changed;
 426   queue_event_hooks.target_changed = queue_target_changed;
 427   queue_event_hooks.selected_frame_level_changed = queue_selected_frame_level_changed;
 428   queue_event_hooks.selected_thread_changed = queue_selected_thread_changed;
 429 #endif
 430
 431   c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger,
 432                    (char *) (&gdb_events_debug), "Set event debugging.\n\
 433 When non-zero, event/notify debugging is enabled.", &setlist);
 434   deprecate_cmd (c, "set debug event");
 435   deprecate_cmd (add_show_from_set (c, &showlist), "show debug event");
 436
 437   add_show_from_set (add_set_cmd ("event",
 438                                   class_maintenance,
 439                                   var_zinteger,
 440                                   (char *) (&gdb_events_debug),
 441                                   "Set event debugging.\n\
 442 When non-zero, event/notify debugging is enabled.", &setdebuglist),
 443                      &showdebuglist);
 444 }