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