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 void
 115 architecture_changed_event (void)
 116 {
 117   if (gdb_events_debug)
 118     fprintf_unfiltered (gdb_stdlog, "architecture_changed_event\n");
 119   if (!current_event_hooks->architecture_changed)
 120     return;
 121   current_event_hooks->architecture_changed ();
 122 }
 123
 124 #endif
 125
 126 #if WITH_GDB_EVENTS
 127 struct gdb_events *
 128 set_gdb_event_hooks (struct gdb_events *vector)
 129 {
 130   struct gdb_events *old_events = current_event_hooks;
 131   if (vector == NULL)
 132     current_event_hooks = &queue_event_hooks;
 133   else
 134     current_event_hooks = vector;
 135   return old_events;
 136 }
 137 #endif
 138
 139 enum gdb_event
 140 {
 141   breakpoint_create,
 142   breakpoint_delete,
 143   breakpoint_modify,
 144   tracepoint_create,
 145   tracepoint_delete,
 146   tracepoint_modify,
 147   architecture_changed,
 148   nr_gdb_events
 149 };
 150
 151 struct breakpoint_create
 152   {
 153     int b;
 154   };
 155
 156 struct breakpoint_delete
 157   {
 158     int b;
 159   };
 160
 161 struct breakpoint_modify
 162   {
 163     int b;
 164   };
 165
 166 struct tracepoint_create
 167   {
 168     int number;
 169   };
 170
 171 struct tracepoint_delete
 172   {
 173     int number;
 174   };
 175
 176 struct tracepoint_modify
 177   {
 178     int number;
 179   };
 180
 181 struct event
 182   {
 183     enum gdb_event type;
 184     struct event *next;
 185     union
 186       {
 187         struct breakpoint_create breakpoint_create;
 188         struct breakpoint_delete breakpoint_delete;
 189         struct breakpoint_modify breakpoint_modify;
 190         struct tracepoint_create tracepoint_create;
 191         struct tracepoint_delete tracepoint_delete;
 192         struct tracepoint_modify tracepoint_modify;
 193       }
 194     data;
 195   };
 196 struct event *pending_events;
 197 struct event *delivering_events;
 198
 199 static void
 200 append (struct event *new_event)
 201 {
 202   struct event **event = &pending_events;
 203   while ((*event) != NULL)
 204     event = &((*event)->next);
 205   (*event) = new_event;
 206   (*event)->next = NULL;
 207 }
 208
 209 static void
 210 queue_breakpoint_create (int b)
 211 {
 212   struct event *event = XMALLOC (struct event);
 213   event->type = breakpoint_create;
 214   event->data.breakpoint_create.b = b;
 215   append (event);
 216 }
 217
 218 static void
 219 queue_breakpoint_delete (int b)
 220 {
 221   struct event *event = XMALLOC (struct event);
 222   event->type = breakpoint_delete;
 223   event->data.breakpoint_delete.b = b;
 224   append (event);
 225 }
 226
 227 static void
 228 queue_breakpoint_modify (int b)
 229 {
 230   struct event *event = XMALLOC (struct event);
 231   event->type = breakpoint_modify;
 232   event->data.breakpoint_modify.b = b;
 233   append (event);
 234 }
 235
 236 static void
 237 queue_tracepoint_create (int number)
 238 {
 239   struct event *event = XMALLOC (struct event);
 240   event->type = tracepoint_create;
 241   event->data.tracepoint_create.number = number;
 242   append (event);
 243 }
 244
 245 static void
 246 queue_tracepoint_delete (int number)
 247 {
 248   struct event *event = XMALLOC (struct event);
 249   event->type = tracepoint_delete;
 250   event->data.tracepoint_delete.number = number;
 251   append (event);
 252 }
 253
 254 static void
 255 queue_tracepoint_modify (int number)
 256 {
 257   struct event *event = XMALLOC (struct event);
 258   event->type = tracepoint_modify;
 259   event->data.tracepoint_modify.number = number;
 260   append (event);
 261 }
 262
 263 static void
 264 queue_architecture_changed (void)
 265 {
 266   struct event *event = XMALLOC (struct event);
 267   event->type = architecture_changed;
 268   append (event);
 269 }
 270
 271 void
 272 gdb_events_deliver (struct gdb_events *vector)
 273 {
 274   /* Just zap any events left around from last time. */
 275   while (delivering_events != NULL)
 276     {
 277       struct event *event = delivering_events;
 278       delivering_events = event->next;
 279       xfree (event);
 280     }
 281   /* Process any pending events.  Because one of the deliveries could
 282      bail out we move everything off of the pending queue onto an
 283      in-progress queue where it can, later, be cleaned up if
 284      necessary. */
 285   delivering_events = pending_events;
 286   pending_events = NULL;
 287   while (delivering_events != NULL)
 288     {
 289       struct event *event = delivering_events;
 290       switch (event->type)
 291         {
 292         case breakpoint_create:
 293           vector->breakpoint_create
 294             (event->data.breakpoint_create.b);
 295           break;
 296         case breakpoint_delete:
 297           vector->breakpoint_delete
 298             (event->data.breakpoint_delete.b);
 299           break;
 300         case breakpoint_modify:
 301           vector->breakpoint_modify
 302             (event->data.breakpoint_modify.b);
 303           break;
 304         case tracepoint_create:
 305           vector->tracepoint_create
 306             (event->data.tracepoint_create.number);
 307           break;
 308         case tracepoint_delete:
 309           vector->tracepoint_delete
 310             (event->data.tracepoint_delete.number);
 311           break;
 312         case tracepoint_modify:
 313           vector->tracepoint_modify
 314             (event->data.tracepoint_modify.number);
 315           break;
 316         case architecture_changed:
 317           vector->architecture_changed ();
 318           break;
 319         }
 320       delivering_events = event->next;
 321       xfree (event);
 322     }
 323 }
 324
 325 void _initialize_gdb_events (void);
 326 void
 327 _initialize_gdb_events (void)
 328 {
 329   struct cmd_list_element *c;
 330 #if WITH_GDB_EVENTS
 331   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 332   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 333   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 334   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 335   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 336   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 337   queue_event_hooks.architecture_changed = queue_architecture_changed;
 338 #endif
 339
 340   c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger,
 341                    (char *) (&gdb_events_debug), "Set event debugging.\n\
 342 When non-zero, event/notify debugging is enabled.", &setlist);
 343   deprecate_cmd (c, "set debug event");
 344   deprecate_cmd (add_show_from_set (c, &showlist), "show debug event");
 345
 346   add_show_from_set (add_set_cmd ("event",
 347                                   class_maintenance,
 348                                   var_zinteger,
 349                                   (char *) (&gdb_events_debug),
 350                                   "Set event debugging.\n\
 351 When non-zero, event/notify debugging is enabled.", &setdebuglist),
 352                      &showdebuglist);
 353 }