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 2 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, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  23    Boston, MA 02110-1301, USA.  */
  24
  25 /* Work in progress */
  26
  27 /* This file was created with the aid of ``gdb-events.sh''.
  28
  29    The bourn shell script ``gdb-events.sh'' creates the files
  30    ``new-gdb-events.c'' and ``new-gdb-events.h and then compares
  31    them against the existing ``gdb-events.[hc]''.  Any differences
  32    found being reported.
  33
  34    If editing this file, please also run gdb-events.sh and merge any
  35    changes into that script. Conversely, when making sweeping changes
  36    to this file, modifying gdb-events.sh and using its output may
  37    prove easier.  */
  38
  39
  40 #include "defs.h"
  41 #include "gdb-events.h"
  42 #include "gdbcmd.h"
  43
  44 static struct gdb_events null_event_hooks;
  45 static struct gdb_events queue_event_hooks;
  46 static struct gdb_events *current_event_hooks = &null_event_hooks;
  47
  48 int gdb_events_debug;
  49 static void
  50 show_gdb_events_debug (struct ui_file *file, int from_tty,
  51                        struct cmd_list_element *c, const char *value)
  52 {
  53   fprintf_filtered (file, _("Event debugging is %s.\n"), value);
  54 }
  55
  56
  57 void
  58 breakpoint_create_event (int b)
  59 {
  60   if (gdb_events_debug)
  61     fprintf_unfiltered (gdb_stdlog, "breakpoint_create_event\n");
  62   if (!current_event_hooks->breakpoint_create)
  63     return;
  64   current_event_hooks->breakpoint_create (b);
  65 }
  66
  67 void
  68 breakpoint_delete_event (int b)
  69 {
  70   if (gdb_events_debug)
  71     fprintf_unfiltered (gdb_stdlog, "breakpoint_delete_event\n");
  72   if (!current_event_hooks->breakpoint_delete)
  73     return;
  74   current_event_hooks->breakpoint_delete (b);
  75 }
  76
  77 void
  78 breakpoint_modify_event (int b)
  79 {
  80   if (gdb_events_debug)
  81     fprintf_unfiltered (gdb_stdlog, "breakpoint_modify_event\n");
  82   if (!current_event_hooks->breakpoint_modify)
  83     return;
  84   current_event_hooks->breakpoint_modify (b);
  85 }
  86
  87 void
  88 tracepoint_create_event (int number)
  89 {
  90   if (gdb_events_debug)
  91     fprintf_unfiltered (gdb_stdlog, "tracepoint_create_event\n");
  92   if (!current_event_hooks->tracepoint_create)
  93     return;
  94   current_event_hooks->tracepoint_create (number);
  95 }
  96
  97 void
  98 tracepoint_delete_event (int number)
  99 {
 100   if (gdb_events_debug)
 101     fprintf_unfiltered (gdb_stdlog, "tracepoint_delete_event\n");
 102   if (!current_event_hooks->tracepoint_delete)
 103     return;
 104   current_event_hooks->tracepoint_delete (number);
 105 }
 106
 107 void
 108 tracepoint_modify_event (int number)
 109 {
 110   if (gdb_events_debug)
 111     fprintf_unfiltered (gdb_stdlog, "tracepoint_modify_event\n");
 112   if (!current_event_hooks->tracepoint_modify)
 113     return;
 114   current_event_hooks->tracepoint_modify (number);
 115 }
 116
 117 void
 118 architecture_changed_event (void)
 119 {
 120   if (gdb_events_debug)
 121     fprintf_unfiltered (gdb_stdlog, "architecture_changed_event\n");
 122   if (!current_event_hooks->architecture_changed)
 123     return;
 124   current_event_hooks->architecture_changed ();
 125 }
 126
 127 struct gdb_events *
 128 deprecated_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
 138 void
 139 clear_gdb_event_hooks (void)
 140 {
 141   deprecated_set_gdb_event_hooks (&null_event_hooks);
 142 }
 143
 144 enum gdb_event
 145 {
 146   breakpoint_create,
 147   breakpoint_delete,
 148   breakpoint_modify,
 149   tracepoint_create,
 150   tracepoint_delete,
 151   tracepoint_modify,
 152   architecture_changed,
 153   nr_gdb_events
 154 };
 155
 156 struct breakpoint_create
 157   {
 158     int b;
 159   };
 160
 161 struct breakpoint_delete
 162   {
 163     int b;
 164   };
 165
 166 struct breakpoint_modify
 167   {
 168     int b;
 169   };
 170
 171 struct tracepoint_create
 172   {
 173     int number;
 174   };
 175
 176 struct tracepoint_delete
 177   {
 178     int number;
 179   };
 180
 181 struct tracepoint_modify
 182   {
 183     int number;
 184   };
 185
 186 struct event
 187   {
 188     enum gdb_event type;
 189     struct event *next;
 190     union
 191       {
 192         struct breakpoint_create breakpoint_create;
 193         struct breakpoint_delete breakpoint_delete;
 194         struct breakpoint_modify breakpoint_modify;
 195         struct tracepoint_create tracepoint_create;
 196         struct tracepoint_delete tracepoint_delete;
 197         struct tracepoint_modify tracepoint_modify;
 198       }
 199     data;
 200   };
 201 struct event *pending_events;
 202 struct event *delivering_events;
 203
 204 static void
 205 append (struct event *new_event)
 206 {
 207   struct event **event = &pending_events;
 208   while ((*event) != NULL)
 209     event = &((*event)->next);
 210   (*event) = new_event;
 211   (*event)->next = NULL;
 212 }
 213
 214 static void
 215 queue_breakpoint_create (int b)
 216 {
 217   struct event *event = XMALLOC (struct event);
 218   event->type = breakpoint_create;
 219   event->data.breakpoint_create.b = b;
 220   append (event);
 221 }
 222
 223 static void
 224 queue_breakpoint_delete (int b)
 225 {
 226   struct event *event = XMALLOC (struct event);
 227   event->type = breakpoint_delete;
 228   event->data.breakpoint_delete.b = b;
 229   append (event);
 230 }
 231
 232 static void
 233 queue_breakpoint_modify (int b)
 234 {
 235   struct event *event = XMALLOC (struct event);
 236   event->type = breakpoint_modify;
 237   event->data.breakpoint_modify.b = b;
 238   append (event);
 239 }
 240
 241 static void
 242 queue_tracepoint_create (int number)
 243 {
 244   struct event *event = XMALLOC (struct event);
 245   event->type = tracepoint_create;
 246   event->data.tracepoint_create.number = number;
 247   append (event);
 248 }
 249
 250 static void
 251 queue_tracepoint_delete (int number)
 252 {
 253   struct event *event = XMALLOC (struct event);
 254   event->type = tracepoint_delete;
 255   event->data.tracepoint_delete.number = number;
 256   append (event);
 257 }
 258
 259 static void
 260 queue_tracepoint_modify (int number)
 261 {
 262   struct event *event = XMALLOC (struct event);
 263   event->type = tracepoint_modify;
 264   event->data.tracepoint_modify.number = number;
 265   append (event);
 266 }
 267
 268 static void
 269 queue_architecture_changed (void)
 270 {
 271   struct event *event = XMALLOC (struct event);
 272   event->type = architecture_changed;
 273   append (event);
 274 }
 275
 276 void
 277 gdb_events_deliver (struct gdb_events *vector)
 278 {
 279   /* Just zap any events left around from last time. */
 280   while (delivering_events != NULL)
 281     {
 282       struct event *event = delivering_events;
 283       delivering_events = event->next;
 284       xfree (event);
 285     }
 286   /* Process any pending events.  Because one of the deliveries could
 287      bail out we move everything off of the pending queue onto an
 288      in-progress queue where it can, later, be cleaned up if
 289      necessary. */
 290   delivering_events = pending_events;
 291   pending_events = NULL;
 292   while (delivering_events != NULL)
 293     {
 294       struct event *event = delivering_events;
 295       switch (event->type)
 296         {
 297         case breakpoint_create:
 298           vector->breakpoint_create
 299             (event->data.breakpoint_create.b);
 300           break;
 301         case breakpoint_delete:
 302           vector->breakpoint_delete
 303             (event->data.breakpoint_delete.b);
 304           break;
 305         case breakpoint_modify:
 306           vector->breakpoint_modify
 307             (event->data.breakpoint_modify.b);
 308           break;
 309         case tracepoint_create:
 310           vector->tracepoint_create
 311             (event->data.tracepoint_create.number);
 312           break;
 313         case tracepoint_delete:
 314           vector->tracepoint_delete
 315             (event->data.tracepoint_delete.number);
 316           break;
 317         case tracepoint_modify:
 318           vector->tracepoint_modify
 319             (event->data.tracepoint_modify.number);
 320           break;
 321         case architecture_changed:
 322           vector->architecture_changed ();
 323           break;
 324         }
 325       delivering_events = event->next;
 326       xfree (event);
 327     }
 328 }
 329
 330 void _initialize_gdb_events (void);
 331 void
 332 _initialize_gdb_events (void)
 333 {
 334   struct cmd_list_element *c;
 335   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 336   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 337   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 338   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 339   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 340   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 341   queue_event_hooks.architecture_changed = queue_architecture_changed;
 342
 343   add_setshow_zinteger_cmd ("event", class_maintenance,
 344                             &gdb_events_debug, _("\
 345 Set event debugging."), _("\
 346 Show event debugging."), _("\
 347 When non-zero, event/notify debugging is enabled."),
 348                             NULL,
 349                             show_gdb_events_debug,
 350                             &setdebuglist, &showdebuglist);
 351 }