gdb/gdb-events.c

   1 /* User Interface Events.
   2
   3    Copyright (C) 1999, 2001, 2002, 2004, 2005, 2007
   4    Free Software Foundation, Inc.
   5
   6    Contributed by Cygnus Solutions.
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  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 static void
  48 show_gdb_events_debug (struct ui_file *file, int from_tty,
  49                        struct cmd_list_element *c, const char *value)
  50 {
  51   fprintf_filtered (file, _("Event debugging is %s.\n"), value);
  52 }
  53
  54
  55 void
  56 breakpoint_create_event (int b)
  57 {
  58   if (gdb_events_debug)
  59     fprintf_unfiltered (gdb_stdlog, "breakpoint_create_event\n");
  60   if (!current_event_hooks->breakpoint_create)
  61     return;
  62   current_event_hooks->breakpoint_create (b);
  63 }
  64
  65 void
  66 breakpoint_delete_event (int b)
  67 {
  68   if (gdb_events_debug)
  69     fprintf_unfiltered (gdb_stdlog, "breakpoint_delete_event\n");
  70   if (!current_event_hooks->breakpoint_delete)
  71     return;
  72   current_event_hooks->breakpoint_delete (b);
  73 }
  74
  75 void
  76 breakpoint_modify_event (int b)
  77 {
  78   if (gdb_events_debug)
  79     fprintf_unfiltered (gdb_stdlog, "breakpoint_modify_event\n");
  80   if (!current_event_hooks->breakpoint_modify)
  81     return;
  82   current_event_hooks->breakpoint_modify (b);
  83 }
  84
  85 void
  86 tracepoint_create_event (int number)
  87 {
  88   if (gdb_events_debug)
  89     fprintf_unfiltered (gdb_stdlog, "tracepoint_create_event\n");
  90   if (!current_event_hooks->tracepoint_create)
  91     return;
  92   current_event_hooks->tracepoint_create (number);
  93 }
  94
  95 void
  96 tracepoint_delete_event (int number)
  97 {
  98   if (gdb_events_debug)
  99     fprintf_unfiltered (gdb_stdlog, "tracepoint_delete_event\n");
 100   if (!current_event_hooks->tracepoint_delete)
 101     return;
 102   current_event_hooks->tracepoint_delete (number);
 103 }
 104
 105 void
 106 tracepoint_modify_event (int number)
 107 {
 108   if (gdb_events_debug)
 109     fprintf_unfiltered (gdb_stdlog, "tracepoint_modify_event\n");
 110   if (!current_event_hooks->tracepoint_modify)
 111     return;
 112   current_event_hooks->tracepoint_modify (number);
 113 }
 114
 115 void
 116 architecture_changed_event (void)
 117 {
 118   if (gdb_events_debug)
 119     fprintf_unfiltered (gdb_stdlog, "architecture_changed_event\n");
 120   if (!current_event_hooks->architecture_changed)
 121     return;
 122   current_event_hooks->architecture_changed ();
 123 }
 124
 125 struct gdb_events *
 126 deprecated_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
 136 void
 137 clear_gdb_event_hooks (void)
 138 {
 139   deprecated_set_gdb_event_hooks (&null_event_hooks);
 140 }
 141
 142 enum gdb_event
 143 {
 144   breakpoint_create,
 145   breakpoint_delete,
 146   breakpoint_modify,
 147   tracepoint_create,
 148   tracepoint_delete,
 149   tracepoint_modify,
 150   architecture_changed,
 151   nr_gdb_events
 152 };
 153
 154 struct breakpoint_create
 155   {
 156     int b;
 157   };
 158
 159 struct breakpoint_delete
 160   {
 161     int b;
 162   };
 163
 164 struct breakpoint_modify
 165   {
 166     int b;
 167   };
 168
 169 struct tracepoint_create
 170   {
 171     int number;
 172   };
 173
 174 struct tracepoint_delete
 175   {
 176     int number;
 177   };
 178
 179 struct tracepoint_modify
 180   {
 181     int number;
 182   };
 183
 184 struct event
 185   {
 186     enum gdb_event type;
 187     struct event *next;
 188     union
 189       {
 190         struct breakpoint_create breakpoint_create;
 191         struct breakpoint_delete breakpoint_delete;
 192         struct breakpoint_modify breakpoint_modify;
 193         struct tracepoint_create tracepoint_create;
 194         struct tracepoint_delete tracepoint_delete;
 195         struct tracepoint_modify tracepoint_modify;
 196       }
 197     data;
 198   };
 199 struct event *pending_events;
 200 struct event *delivering_events;
 201
 202 static void
 203 append (struct event *new_event)
 204 {
 205   struct event **event = &pending_events;
 206   while ((*event) != NULL)
 207     event = &((*event)->next);
 208   (*event) = new_event;
 209   (*event)->next = NULL;
 210 }
 211
 212 static void
 213 queue_breakpoint_create (int b)
 214 {
 215   struct event *event = XMALLOC (struct event);
 216   event->type = breakpoint_create;
 217   event->data.breakpoint_create.b = b;
 218   append (event);
 219 }
 220
 221 static void
 222 queue_breakpoint_delete (int b)
 223 {
 224   struct event *event = XMALLOC (struct event);
 225   event->type = breakpoint_delete;
 226   event->data.breakpoint_delete.b = b;
 227   append (event);
 228 }
 229
 230 static void
 231 queue_breakpoint_modify (int b)
 232 {
 233   struct event *event = XMALLOC (struct event);
 234   event->type = breakpoint_modify;
 235   event->data.breakpoint_modify.b = b;
 236   append (event);
 237 }
 238
 239 static void
 240 queue_tracepoint_create (int number)
 241 {
 242   struct event *event = XMALLOC (struct event);
 243   event->type = tracepoint_create;
 244   event->data.tracepoint_create.number = number;
 245   append (event);
 246 }
 247
 248 static void
 249 queue_tracepoint_delete (int number)
 250 {
 251   struct event *event = XMALLOC (struct event);
 252   event->type = tracepoint_delete;
 253   event->data.tracepoint_delete.number = number;
 254   append (event);
 255 }
 256
 257 static void
 258 queue_tracepoint_modify (int number)
 259 {
 260   struct event *event = XMALLOC (struct event);
 261   event->type = tracepoint_modify;
 262   event->data.tracepoint_modify.number = number;
 263   append (event);
 264 }
 265
 266 static void
 267 queue_architecture_changed (void)
 268 {
 269   struct event *event = XMALLOC (struct event);
 270   event->type = architecture_changed;
 271   append (event);
 272 }
 273
 274 void
 275 gdb_events_deliver (struct gdb_events *vector)
 276 {
 277   /* Just zap any events left around from last time. */
 278   while (delivering_events != NULL)
 279     {
 280       struct event *event = delivering_events;
 281       delivering_events = event->next;
 282       xfree (event);
 283     }
 284   /* Process any pending events.  Because one of the deliveries could
 285      bail out we move everything off of the pending queue onto an
 286      in-progress queue where it can, later, be cleaned up if
 287      necessary. */
 288   delivering_events = pending_events;
 289   pending_events = NULL;
 290   while (delivering_events != NULL)
 291     {
 292       struct event *event = delivering_events;
 293       switch (event->type)
 294         {
 295         case breakpoint_create:
 296           vector->breakpoint_create
 297             (event->data.breakpoint_create.b);
 298           break;
 299         case breakpoint_delete:
 300           vector->breakpoint_delete
 301             (event->data.breakpoint_delete.b);
 302           break;
 303         case breakpoint_modify:
 304           vector->breakpoint_modify
 305             (event->data.breakpoint_modify.b);
 306           break;
 307         case tracepoint_create:
 308           vector->tracepoint_create
 309             (event->data.tracepoint_create.number);
 310           break;
 311         case tracepoint_delete:
 312           vector->tracepoint_delete
 313             (event->data.tracepoint_delete.number);
 314           break;
 315         case tracepoint_modify:
 316           vector->tracepoint_modify
 317             (event->data.tracepoint_modify.number);
 318           break;
 319         case architecture_changed:
 320           vector->architecture_changed ();
 321           break;
 322         }
 323       delivering_events = event->next;
 324       xfree (event);
 325     }
 326 }
 327
 328 void _initialize_gdb_events (void);
 329 void
 330 _initialize_gdb_events (void)
 331 {
 332   struct cmd_list_element *c;
 333   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 334   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 335   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 336   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 337   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 338   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 339   queue_event_hooks.architecture_changed = queue_architecture_changed;
 340
 341   add_setshow_zinteger_cmd ("event", class_maintenance,
 342                             &gdb_events_debug, _("\
 343 Set event debugging."), _("\
 344 Show event debugging."), _("\
 345 When non-zero, event/notify debugging is enabled."),
 346                             NULL,
 347                             show_gdb_events_debug,
 348                             &setdebuglist, &showdebuglist);
 349 }