gdb/gdb-events.c

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