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 #endif
 133
 134 #if WITH_GDB_EVENTS
 135 struct gdb_events *
 136 set_gdb_event_hooks (struct gdb_events *vector)
 137 {
 138   struct gdb_events *old_events = current_event_hooks;
 139   if (vector == NULL)
 140     current_event_hooks = &queue_event_hooks;
 141   else
 142     current_event_hooks = vector;
 143   return old_events;
 144 }
 145 #endif
 146
 147 #if WITH_GDB_EVENTS
 148 void
 149 clear_gdb_event_hooks (void)
 150 {
 151   set_gdb_event_hooks (&null_event_hooks);
 152 }
 153 #endif
 154
 155 enum gdb_event
 156 {
 157   breakpoint_create,
 158   breakpoint_delete,
 159   breakpoint_modify,
 160   tracepoint_create,
 161   tracepoint_delete,
 162   tracepoint_modify,
 163   architecture_changed,
 164   target_changed,
 165   nr_gdb_events
 166 };
 167
 168 struct breakpoint_create
 169   {
 170     int b;
 171   };
 172
 173 struct breakpoint_delete
 174   {
 175     int b;
 176   };
 177
 178 struct breakpoint_modify
 179   {
 180     int b;
 181   };
 182
 183 struct tracepoint_create
 184   {
 185     int number;
 186   };
 187
 188 struct tracepoint_delete
 189   {
 190     int number;
 191   };
 192
 193 struct tracepoint_modify
 194   {
 195     int number;
 196   };
 197
 198 struct event
 199   {
 200     enum gdb_event type;
 201     struct event *next;
 202     union
 203       {
 204         struct breakpoint_create breakpoint_create;
 205         struct breakpoint_delete breakpoint_delete;
 206         struct breakpoint_modify breakpoint_modify;
 207         struct tracepoint_create tracepoint_create;
 208         struct tracepoint_delete tracepoint_delete;
 209         struct tracepoint_modify tracepoint_modify;
 210       }
 211     data;
 212   };
 213 struct event *pending_events;
 214 struct event *delivering_events;
 215
 216 static void
 217 append (struct event *new_event)
 218 {
 219   struct event **event = &pending_events;
 220   while ((*event) != NULL)
 221     event = &((*event)->next);
 222   (*event) = new_event;
 223   (*event)->next = NULL;
 224 }
 225
 226 static void
 227 queue_breakpoint_create (int b)
 228 {
 229   struct event *event = XMALLOC (struct event);
 230   event->type = breakpoint_create;
 231   event->data.breakpoint_create.b = b;
 232   append (event);
 233 }
 234
 235 static void
 236 queue_breakpoint_delete (int b)
 237 {
 238   struct event *event = XMALLOC (struct event);
 239   event->type = breakpoint_delete;
 240   event->data.breakpoint_delete.b = b;
 241   append (event);
 242 }
 243
 244 static void
 245 queue_breakpoint_modify (int b)
 246 {
 247   struct event *event = XMALLOC (struct event);
 248   event->type = breakpoint_modify;
 249   event->data.breakpoint_modify.b = b;
 250   append (event);
 251 }
 252
 253 static void
 254 queue_tracepoint_create (int number)
 255 {
 256   struct event *event = XMALLOC (struct event);
 257   event->type = tracepoint_create;
 258   event->data.tracepoint_create.number = number;
 259   append (event);
 260 }
 261
 262 static void
 263 queue_tracepoint_delete (int number)
 264 {
 265   struct event *event = XMALLOC (struct event);
 266   event->type = tracepoint_delete;
 267   event->data.tracepoint_delete.number = number;
 268   append (event);
 269 }
 270
 271 static void
 272 queue_tracepoint_modify (int number)
 273 {
 274   struct event *event = XMALLOC (struct event);
 275   event->type = tracepoint_modify;
 276   event->data.tracepoint_modify.number = number;
 277   append (event);
 278 }
 279
 280 static void
 281 queue_architecture_changed (void)
 282 {
 283   struct event *event = XMALLOC (struct event);
 284   event->type = architecture_changed;
 285   append (event);
 286 }
 287
 288 static void
 289 queue_target_changed (void)
 290 {
 291   struct event *event = XMALLOC (struct event);
 292   event->type = target_changed;
 293   append (event);
 294 }
 295
 296 void
 297 gdb_events_deliver (struct gdb_events *vector)
 298 {
 299   /* Just zap any events left around from last time. */
 300   while (delivering_events != NULL)
 301     {
 302       struct event *event = delivering_events;
 303       delivering_events = event->next;
 304       xfree (event);
 305     }
 306   /* Process any pending events.  Because one of the deliveries could
 307      bail out we move everything off of the pending queue onto an
 308      in-progress queue where it can, later, be cleaned up if
 309      necessary. */
 310   delivering_events = pending_events;
 311   pending_events = NULL;
 312   while (delivering_events != NULL)
 313     {
 314       struct event *event = delivering_events;
 315       switch (event->type)
 316         {
 317         case breakpoint_create:
 318           vector->breakpoint_create
 319             (event->data.breakpoint_create.b);
 320           break;
 321         case breakpoint_delete:
 322           vector->breakpoint_delete
 323             (event->data.breakpoint_delete.b);
 324           break;
 325         case breakpoint_modify:
 326           vector->breakpoint_modify
 327             (event->data.breakpoint_modify.b);
 328           break;
 329         case tracepoint_create:
 330           vector->tracepoint_create
 331             (event->data.tracepoint_create.number);
 332           break;
 333         case tracepoint_delete:
 334           vector->tracepoint_delete
 335             (event->data.tracepoint_delete.number);
 336           break;
 337         case tracepoint_modify:
 338           vector->tracepoint_modify
 339             (event->data.tracepoint_modify.number);
 340           break;
 341         case architecture_changed:
 342           vector->architecture_changed ();
 343           break;
 344         case target_changed:
 345           vector->target_changed ();
 346           break;
 347         }
 348       delivering_events = event->next;
 349       xfree (event);
 350     }
 351 }
 352
 353 void _initialize_gdb_events (void);
 354 void
 355 _initialize_gdb_events (void)
 356 {
 357   struct cmd_list_element *c;
 358 #if WITH_GDB_EVENTS
 359   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 360   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 361   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 362   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 363   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 364   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 365   queue_event_hooks.architecture_changed = queue_architecture_changed;
 366   queue_event_hooks.target_changed = queue_target_changed;
 367 #endif
 368
 369   c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger,
 370                    (char *) (&gdb_events_debug), "Set event debugging.\n\
 371 When non-zero, event/notify debugging is enabled.", &setlist);
 372   deprecate_cmd (c, "set debug event");
 373   deprecate_cmd (add_show_from_set (c, &showlist), "show debug event");
 374
 375   add_show_from_set (add_set_cmd ("event",
 376                                   class_maintenance,
 377                                   var_zinteger,
 378                                   (char *) (&gdb_events_debug),
 379                                   "Set event debugging.\n\
 380 When non-zero, event/notify debugging is enabled.", &setdebuglist),
 381                      &showdebuglist);
 382 }