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 #endif
 123
 124 #if WITH_GDB_EVENTS
 125 struct gdb_events *
 126 set_gdb_event_hooks (struct gdb_events *vector)
 127 {
 128   struct gdb_events *old_events = current_event_hooks;
 129   if (vector == NULL)
 130     current_event_hooks = &queue_event_hooks;
 131   else
 132     current_event_hooks = vector;
 133   return old_events;
 134 }
 135 #endif
 136
 137 #if WITH_GDB_EVENTS
 138 void
 139 clear_gdb_event_hooks (void)
 140 {
 141   set_gdb_event_hooks (&null_event_hooks);
 142 }
 143 #endif
 144
 145 enum gdb_event
 146 {
 147   breakpoint_create,
 148   breakpoint_delete,
 149   breakpoint_modify,
 150   tracepoint_create,
 151   tracepoint_delete,
 152   tracepoint_modify,
 153   architecture_changed,
 154   nr_gdb_events
 155 };
 156
 157 struct breakpoint_create
 158   {
 159     int b;
 160   };
 161
 162 struct breakpoint_delete
 163   {
 164     int b;
 165   };
 166
 167 struct breakpoint_modify
 168   {
 169     int b;
 170   };
 171
 172 struct tracepoint_create
 173   {
 174     int number;
 175   };
 176
 177 struct tracepoint_delete
 178   {
 179     int number;
 180   };
 181
 182 struct tracepoint_modify
 183   {
 184     int number;
 185   };
 186
 187 struct event
 188   {
 189     enum gdb_event type;
 190     struct event *next;
 191     union
 192       {
 193         struct breakpoint_create breakpoint_create;
 194         struct breakpoint_delete breakpoint_delete;
 195         struct breakpoint_modify breakpoint_modify;
 196         struct tracepoint_create tracepoint_create;
 197         struct tracepoint_delete tracepoint_delete;
 198         struct tracepoint_modify tracepoint_modify;
 199       }
 200     data;
 201   };
 202 struct event *pending_events;
 203 struct event *delivering_events;
 204
 205 static void
 206 append (struct event *new_event)
 207 {
 208   struct event **event = &pending_events;
 209   while ((*event) != NULL)
 210     event = &((*event)->next);
 211   (*event) = new_event;
 212   (*event)->next = NULL;
 213 }
 214
 215 static void
 216 queue_breakpoint_create (int b)
 217 {
 218   struct event *event = XMALLOC (struct event);
 219   event->type = breakpoint_create;
 220   event->data.breakpoint_create.b = b;
 221   append (event);
 222 }
 223
 224 static void
 225 queue_breakpoint_delete (int b)
 226 {
 227   struct event *event = XMALLOC (struct event);
 228   event->type = breakpoint_delete;
 229   event->data.breakpoint_delete.b = b;
 230   append (event);
 231 }
 232
 233 static void
 234 queue_breakpoint_modify (int b)
 235 {
 236   struct event *event = XMALLOC (struct event);
 237   event->type = breakpoint_modify;
 238   event->data.breakpoint_modify.b = b;
 239   append (event);
 240 }
 241
 242 static void
 243 queue_tracepoint_create (int number)
 244 {
 245   struct event *event = XMALLOC (struct event);
 246   event->type = tracepoint_create;
 247   event->data.tracepoint_create.number = number;
 248   append (event);
 249 }
 250
 251 static void
 252 queue_tracepoint_delete (int number)
 253 {
 254   struct event *event = XMALLOC (struct event);
 255   event->type = tracepoint_delete;
 256   event->data.tracepoint_delete.number = number;
 257   append (event);
 258 }
 259
 260 static void
 261 queue_tracepoint_modify (int number)
 262 {
 263   struct event *event = XMALLOC (struct event);
 264   event->type = tracepoint_modify;
 265   event->data.tracepoint_modify.number = number;
 266   append (event);
 267 }
 268
 269 static void
 270 queue_architecture_changed (void)
 271 {
 272   struct event *event = XMALLOC (struct event);
 273   event->type = architecture_changed;
 274   append (event);
 275 }
 276
 277 void
 278 gdb_events_deliver (struct gdb_events *vector)
 279 {
 280   /* Just zap any events left around from last time. */
 281   while (delivering_events != NULL)
 282     {
 283       struct event *event = delivering_events;
 284       delivering_events = event->next;
 285       xfree (event);
 286     }
 287   /* Process any pending events.  Because one of the deliveries could
 288      bail out we move everything off of the pending queue onto an
 289      in-progress queue where it can, later, be cleaned up if
 290      necessary. */
 291   delivering_events = pending_events;
 292   pending_events = NULL;
 293   while (delivering_events != NULL)
 294     {
 295       struct event *event = delivering_events;
 296       switch (event->type)
 297         {
 298         case breakpoint_create:
 299           vector->breakpoint_create
 300             (event->data.breakpoint_create.b);
 301           break;
 302         case breakpoint_delete:
 303           vector->breakpoint_delete
 304             (event->data.breakpoint_delete.b);
 305           break;
 306         case breakpoint_modify:
 307           vector->breakpoint_modify
 308             (event->data.breakpoint_modify.b);
 309           break;
 310         case tracepoint_create:
 311           vector->tracepoint_create
 312             (event->data.tracepoint_create.number);
 313           break;
 314         case tracepoint_delete:
 315           vector->tracepoint_delete
 316             (event->data.tracepoint_delete.number);
 317           break;
 318         case tracepoint_modify:
 319           vector->tracepoint_modify
 320             (event->data.tracepoint_modify.number);
 321           break;
 322         case architecture_changed:
 323           vector->architecture_changed ();
 324           break;
 325         }
 326       delivering_events = event->next;
 327       xfree (event);
 328     }
 329 }
 330
 331 void _initialize_gdb_events (void);
 332 void
 333 _initialize_gdb_events (void)
 334 {
 335   struct cmd_list_element *c;
 336 #if WITH_GDB_EVENTS
 337   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 338   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 339   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 340   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 341   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 342   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 343   queue_event_hooks.architecture_changed = queue_architecture_changed;
 344 #endif
 345
 346   c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger,
 347                    (char *) (&gdb_events_debug), "Set event debugging.\n\
 348 When non-zero, event/notify debugging is enabled.", &setlist);
 349   deprecate_cmd (c, "set debug event");
 350   deprecate_cmd (add_show_from_set (c, &showlist), "show debug event");
 351
 352   add_show_from_set (add_set_cmd ("event",
 353                                   class_maintenance,
 354                                   var_zinteger,
 355                                   (char *) (&gdb_events_debug),
 356                                   "Set event debugging.\n\
 357 When non-zero, event/notify debugging is enabled.", &setdebuglist),
 358                      &showdebuglist);
 359 }