gdb/gdb-events.c

   1 /* User Interface Events.
   2
   3    Copyright 1999, 2001, 2002, 2004 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 static struct gdb_events null_event_hooks;
  43 static struct gdb_events queue_event_hooks;
  44 static struct gdb_events *current_event_hooks = &null_event_hooks;
  45
  46 int gdb_events_debug;
  47
  48 void
  49 breakpoint_create_event (int b)
  50 {
  51   if (gdb_events_debug)
  52     fprintf_unfiltered (gdb_stdlog, "breakpoint_create_event\n");
  53   if (!current_event_hooks->breakpoint_create)
  54     return;
  55   current_event_hooks->breakpoint_create (b);
  56 }
  57
  58 void
  59 breakpoint_delete_event (int b)
  60 {
  61   if (gdb_events_debug)
  62     fprintf_unfiltered (gdb_stdlog, "breakpoint_delete_event\n");
  63   if (!current_event_hooks->breakpoint_delete)
  64     return;
  65   current_event_hooks->breakpoint_delete (b);
  66 }
  67
  68 void
  69 breakpoint_modify_event (int b)
  70 {
  71   if (gdb_events_debug)
  72     fprintf_unfiltered (gdb_stdlog, "breakpoint_modify_event\n");
  73   if (!current_event_hooks->breakpoint_modify)
  74     return;
  75   current_event_hooks->breakpoint_modify (b);
  76 }
  77
  78 void
  79 tracepoint_create_event (int number)
  80 {
  81   if (gdb_events_debug)
  82     fprintf_unfiltered (gdb_stdlog, "tracepoint_create_event\n");
  83   if (!current_event_hooks->tracepoint_create)
  84     return;
  85   current_event_hooks->tracepoint_create (number);
  86 }
  87
  88 void
  89 tracepoint_delete_event (int number)
  90 {
  91   if (gdb_events_debug)
  92     fprintf_unfiltered (gdb_stdlog, "tracepoint_delete_event\n");
  93   if (!current_event_hooks->tracepoint_delete)
  94     return;
  95   current_event_hooks->tracepoint_delete (number);
  96 }
  97
  98 void
  99 tracepoint_modify_event (int number)
 100 {
 101   if (gdb_events_debug)
 102     fprintf_unfiltered (gdb_stdlog, "tracepoint_modify_event\n");
 103   if (!current_event_hooks->tracepoint_modify)
 104     return;
 105   current_event_hooks->tracepoint_modify (number);
 106 }
 107
 108 void
 109 architecture_changed_event (void)
 110 {
 111   if (gdb_events_debug)
 112     fprintf_unfiltered (gdb_stdlog, "architecture_changed_event\n");
 113   if (!current_event_hooks->architecture_changed)
 114     return;
 115   current_event_hooks->architecture_changed ();
 116 }
 117
 118 struct gdb_events *
 119 deprecated_set_gdb_event_hooks (struct gdb_events *vector)
 120 {
 121   struct gdb_events *old_events = current_event_hooks;
 122   if (vector == NULL)
 123     current_event_hooks = &queue_event_hooks;
 124   else
 125     current_event_hooks = vector;
 126   return old_events;
 127 }
 128
 129 void
 130 clear_gdb_event_hooks (void)
 131 {
 132   deprecated_set_gdb_event_hooks (&null_event_hooks);
 133 }
 134
 135 enum gdb_event
 136 {
 137   breakpoint_create,
 138   breakpoint_delete,
 139   breakpoint_modify,
 140   tracepoint_create,
 141   tracepoint_delete,
 142   tracepoint_modify,
 143   architecture_changed,
 144   nr_gdb_events
 145 };
 146
 147 struct breakpoint_create
 148   {
 149     int b;
 150   };
 151
 152 struct breakpoint_delete
 153   {
 154     int b;
 155   };
 156
 157 struct breakpoint_modify
 158   {
 159     int b;
 160   };
 161
 162 struct tracepoint_create
 163   {
 164     int number;
 165   };
 166
 167 struct tracepoint_delete
 168   {
 169     int number;
 170   };
 171
 172 struct tracepoint_modify
 173   {
 174     int number;
 175   };
 176
 177 struct event
 178   {
 179     enum gdb_event type;
 180     struct event *next;
 181     union
 182       {
 183         struct breakpoint_create breakpoint_create;
 184         struct breakpoint_delete breakpoint_delete;
 185         struct breakpoint_modify breakpoint_modify;
 186         struct tracepoint_create tracepoint_create;
 187         struct tracepoint_delete tracepoint_delete;
 188         struct tracepoint_modify tracepoint_modify;
 189       }
 190     data;
 191   };
 192 struct event *pending_events;
 193 struct event *delivering_events;
 194
 195 static void
 196 append (struct event *new_event)
 197 {
 198   struct event **event = &pending_events;
 199   while ((*event) != NULL)
 200     event = &((*event)->next);
 201   (*event) = new_event;
 202   (*event)->next = NULL;
 203 }
 204
 205 static void
 206 queue_breakpoint_create (int b)
 207 {
 208   struct event *event = XMALLOC (struct event);
 209   event->type = breakpoint_create;
 210   event->data.breakpoint_create.b = b;
 211   append (event);
 212 }
 213
 214 static void
 215 queue_breakpoint_delete (int b)
 216 {
 217   struct event *event = XMALLOC (struct event);
 218   event->type = breakpoint_delete;
 219   event->data.breakpoint_delete.b = b;
 220   append (event);
 221 }
 222
 223 static void
 224 queue_breakpoint_modify (int b)
 225 {
 226   struct event *event = XMALLOC (struct event);
 227   event->type = breakpoint_modify;
 228   event->data.breakpoint_modify.b = b;
 229   append (event);
 230 }
 231
 232 static void
 233 queue_tracepoint_create (int number)
 234 {
 235   struct event *event = XMALLOC (struct event);
 236   event->type = tracepoint_create;
 237   event->data.tracepoint_create.number = number;
 238   append (event);
 239 }
 240
 241 static void
 242 queue_tracepoint_delete (int number)
 243 {
 244   struct event *event = XMALLOC (struct event);
 245   event->type = tracepoint_delete;
 246   event->data.tracepoint_delete.number = number;
 247   append (event);
 248 }
 249
 250 static void
 251 queue_tracepoint_modify (int number)
 252 {
 253   struct event *event = XMALLOC (struct event);
 254   event->type = tracepoint_modify;
 255   event->data.tracepoint_modify.number = number;
 256   append (event);
 257 }
 258
 259 static void
 260 queue_architecture_changed (void)
 261 {
 262   struct event *event = XMALLOC (struct event);
 263   event->type = architecture_changed;
 264   append (event);
 265 }
 266
 267 void
 268 gdb_events_deliver (struct gdb_events *vector)
 269 {
 270   /* Just zap any events left around from last time. */
 271   while (delivering_events != NULL)
 272     {
 273       struct event *event = delivering_events;
 274       delivering_events = event->next;
 275       xfree (event);
 276     }
 277   /* Process any pending events.  Because one of the deliveries could
 278      bail out we move everything off of the pending queue onto an
 279      in-progress queue where it can, later, be cleaned up if
 280      necessary. */
 281   delivering_events = pending_events;
 282   pending_events = NULL;
 283   while (delivering_events != NULL)
 284     {
 285       struct event *event = delivering_events;
 286       switch (event->type)
 287         {
 288         case breakpoint_create:
 289           vector->breakpoint_create
 290             (event->data.breakpoint_create.b);
 291           break;
 292         case breakpoint_delete:
 293           vector->breakpoint_delete
 294             (event->data.breakpoint_delete.b);
 295           break;
 296         case breakpoint_modify:
 297           vector->breakpoint_modify
 298             (event->data.breakpoint_modify.b);
 299           break;
 300         case tracepoint_create:
 301           vector->tracepoint_create
 302             (event->data.tracepoint_create.number);
 303           break;
 304         case tracepoint_delete:
 305           vector->tracepoint_delete
 306             (event->data.tracepoint_delete.number);
 307           break;
 308         case tracepoint_modify:
 309           vector->tracepoint_modify
 310             (event->data.tracepoint_modify.number);
 311           break;
 312         case architecture_changed:
 313           vector->architecture_changed ();
 314           break;
 315         }
 316       delivering_events = event->next;
 317       xfree (event);
 318     }
 319 }
 320
 321 void _initialize_gdb_events (void);
 322 void
 323 _initialize_gdb_events (void)
 324 {
 325   struct cmd_list_element *c;
 326   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 327   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 328   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 329   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 330   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 331   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 332   queue_event_hooks.architecture_changed = queue_architecture_changed;
 333
 334   c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger,
 335                    (char *) (&gdb_events_debug), "Set event debugging.\n\
 336 When non-zero, event/notify debugging is enabled.", &setlist);
 337   deprecate_cmd (c, "set debug event");
 338   deprecate_cmd (deprecated_add_show_from_set (c, &showlist),
 339                  "show debug event");
 340
 341   deprecated_add_show_from_set
 342     (add_set_cmd ("event",
 343                   class_maintenance,
 344                   var_zinteger,
 345                   (char *) (&gdb_events_debug),
 346                   "Set event debugging.\n\
 347 When non-zero, event/notify debugging is enabled.", &setdebuglist),
 348      &showdebuglist);
 349 }