gdb/gdb-events.c

   1 /* User Interface Events.
   2
   3    Copyright 1999, 2001, 2002, 2004, 2005 Free Software Foundation,
   4    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  23
  24 /* Work in progress */
  25
  26 /* This file was created with the aid of ``gdb-events.sh''.
  27
  28    The bourn shell script ``gdb-events.sh'' creates the files
  29    ``new-gdb-events.c'' and ``new-gdb-events.h and then compares
  30    them against the existing ``gdb-events.[hc]''.  Any differences
  31    found being reported.
  32
  33    If editing this file, please also run gdb-events.sh and merge any
  34    changes into that script. Conversely, when making sweeping changes
  35    to this file, modifying gdb-events.sh and using its output may
  36    prove easier.  */
  37
  38
  39 #include "defs.h"
  40 #include "gdb-events.h"
  41 #include "gdbcmd.h"
  42
  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
  47 int gdb_events_debug;
  48 static void
  49 show_gdb_events_debug (struct ui_file *file, int from_tty,
  50                        struct cmd_list_element *c, const char *value)
  51 {
  52   fprintf_filtered (file, _("Event debugging is %s.\n"), value);
  53 }
  54
  55
  56 void
  57 breakpoint_create_event (int b)
  58 {
  59   if (gdb_events_debug)
  60     fprintf_unfiltered (gdb_stdlog, "breakpoint_create_event\n");
  61   if (!current_event_hooks->breakpoint_create)
  62     return;
  63   current_event_hooks->breakpoint_create (b);
  64 }
  65
  66 void
  67 breakpoint_delete_event (int b)
  68 {
  69   if (gdb_events_debug)
  70     fprintf_unfiltered (gdb_stdlog, "breakpoint_delete_event\n");
  71   if (!current_event_hooks->breakpoint_delete)
  72     return;
  73   current_event_hooks->breakpoint_delete (b);
  74 }
  75
  76 void
  77 breakpoint_modify_event (int b)
  78 {
  79   if (gdb_events_debug)
  80     fprintf_unfiltered (gdb_stdlog, "breakpoint_modify_event\n");
  81   if (!current_event_hooks->breakpoint_modify)
  82     return;
  83   current_event_hooks->breakpoint_modify (b);
  84 }
  85
  86 void
  87 tracepoint_create_event (int number)
  88 {
  89   if (gdb_events_debug)
  90     fprintf_unfiltered (gdb_stdlog, "tracepoint_create_event\n");
  91   if (!current_event_hooks->tracepoint_create)
  92     return;
  93   current_event_hooks->tracepoint_create (number);
  94 }
  95
  96 void
  97 tracepoint_delete_event (int number)
  98 {
  99   if (gdb_events_debug)
 100     fprintf_unfiltered (gdb_stdlog, "tracepoint_delete_event\n");
 101   if (!current_event_hooks->tracepoint_delete)
 102     return;
 103   current_event_hooks->tracepoint_delete (number);
 104 }
 105
 106 void
 107 tracepoint_modify_event (int number)
 108 {
 109   if (gdb_events_debug)
 110     fprintf_unfiltered (gdb_stdlog, "tracepoint_modify_event\n");
 111   if (!current_event_hooks->tracepoint_modify)
 112     return;
 113   current_event_hooks->tracepoint_modify (number);
 114 }
 115
 116 void
 117 architecture_changed_event (void)
 118 {
 119   if (gdb_events_debug)
 120     fprintf_unfiltered (gdb_stdlog, "architecture_changed_event\n");
 121   if (!current_event_hooks->architecture_changed)
 122     return;
 123   current_event_hooks->architecture_changed ();
 124 }
 125
 126 struct gdb_events *
 127 deprecated_set_gdb_event_hooks (struct gdb_events *vector)
 128 {
 129   struct gdb_events *old_events = current_event_hooks;
 130   if (vector == NULL)
 131     current_event_hooks = &queue_event_hooks;
 132   else
 133     current_event_hooks = vector;
 134   return old_events;
 135 }
 136
 137 void
 138 clear_gdb_event_hooks (void)
 139 {
 140   deprecated_set_gdb_event_hooks (&null_event_hooks);
 141 }
 142
 143 enum gdb_event
 144 {
 145   breakpoint_create,
 146   breakpoint_delete,
 147   breakpoint_modify,
 148   tracepoint_create,
 149   tracepoint_delete,
 150   tracepoint_modify,
 151   architecture_changed,
 152   nr_gdb_events
 153 };
 154
 155 struct breakpoint_create
 156   {
 157     int b;
 158   };
 159
 160 struct breakpoint_delete
 161   {
 162     int b;
 163   };
 164
 165 struct breakpoint_modify
 166   {
 167     int b;
 168   };
 169
 170 struct tracepoint_create
 171   {
 172     int number;
 173   };
 174
 175 struct tracepoint_delete
 176   {
 177     int number;
 178   };
 179
 180 struct tracepoint_modify
 181   {
 182     int number;
 183   };
 184
 185 struct event
 186   {
 187     enum gdb_event type;
 188     struct event *next;
 189     union
 190       {
 191         struct breakpoint_create breakpoint_create;
 192         struct breakpoint_delete breakpoint_delete;
 193         struct breakpoint_modify breakpoint_modify;
 194         struct tracepoint_create tracepoint_create;
 195         struct tracepoint_delete tracepoint_delete;
 196         struct tracepoint_modify tracepoint_modify;
 197       }
 198     data;
 199   };
 200 struct event *pending_events;
 201 struct event *delivering_events;
 202
 203 static void
 204 append (struct event *new_event)
 205 {
 206   struct event **event = &pending_events;
 207   while ((*event) != NULL)
 208     event = &((*event)->next);
 209   (*event) = new_event;
 210   (*event)->next = NULL;
 211 }
 212
 213 static void
 214 queue_breakpoint_create (int b)
 215 {
 216   struct event *event = XMALLOC (struct event);
 217   event->type = breakpoint_create;
 218   event->data.breakpoint_create.b = b;
 219   append (event);
 220 }
 221
 222 static void
 223 queue_breakpoint_delete (int b)
 224 {
 225   struct event *event = XMALLOC (struct event);
 226   event->type = breakpoint_delete;
 227   event->data.breakpoint_delete.b = b;
 228   append (event);
 229 }
 230
 231 static void
 232 queue_breakpoint_modify (int b)
 233 {
 234   struct event *event = XMALLOC (struct event);
 235   event->type = breakpoint_modify;
 236   event->data.breakpoint_modify.b = b;
 237   append (event);
 238 }
 239
 240 static void
 241 queue_tracepoint_create (int number)
 242 {
 243   struct event *event = XMALLOC (struct event);
 244   event->type = tracepoint_create;
 245   event->data.tracepoint_create.number = number;
 246   append (event);
 247 }
 248
 249 static void
 250 queue_tracepoint_delete (int number)
 251 {
 252   struct event *event = XMALLOC (struct event);
 253   event->type = tracepoint_delete;
 254   event->data.tracepoint_delete.number = number;
 255   append (event);
 256 }
 257
 258 static void
 259 queue_tracepoint_modify (int number)
 260 {
 261   struct event *event = XMALLOC (struct event);
 262   event->type = tracepoint_modify;
 263   event->data.tracepoint_modify.number = number;
 264   append (event);
 265 }
 266
 267 static void
 268 queue_architecture_changed (void)
 269 {
 270   struct event *event = XMALLOC (struct event);
 271   event->type = architecture_changed;
 272   append (event);
 273 }
 274
 275 void
 276 gdb_events_deliver (struct gdb_events *vector)
 277 {
 278   /* Just zap any events left around from last time. */
 279   while (delivering_events != NULL)
 280     {
 281       struct event *event = delivering_events;
 282       delivering_events = event->next;
 283       xfree (event);
 284     }
 285   /* Process any pending events.  Because one of the deliveries could
 286      bail out we move everything off of the pending queue onto an
 287      in-progress queue where it can, later, be cleaned up if
 288      necessary. */
 289   delivering_events = pending_events;
 290   pending_events = NULL;
 291   while (delivering_events != NULL)
 292     {
 293       struct event *event = delivering_events;
 294       switch (event->type)
 295         {
 296         case breakpoint_create:
 297           vector->breakpoint_create
 298             (event->data.breakpoint_create.b);
 299           break;
 300         case breakpoint_delete:
 301           vector->breakpoint_delete
 302             (event->data.breakpoint_delete.b);
 303           break;
 304         case breakpoint_modify:
 305           vector->breakpoint_modify
 306             (event->data.breakpoint_modify.b);
 307           break;
 308         case tracepoint_create:
 309           vector->tracepoint_create
 310             (event->data.tracepoint_create.number);
 311           break;
 312         case tracepoint_delete:
 313           vector->tracepoint_delete
 314             (event->data.tracepoint_delete.number);
 315           break;
 316         case tracepoint_modify:
 317           vector->tracepoint_modify
 318             (event->data.tracepoint_modify.number);
 319           break;
 320         case architecture_changed:
 321           vector->architecture_changed ();
 322           break;
 323         }
 324       delivering_events = event->next;
 325       xfree (event);
 326     }
 327 }
 328
 329 void _initialize_gdb_events (void);
 330 void
 331 _initialize_gdb_events (void)
 332 {
 333   struct cmd_list_element *c;
 334   queue_event_hooks.breakpoint_create = queue_breakpoint_create;
 335   queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
 336   queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
 337   queue_event_hooks.tracepoint_create = queue_tracepoint_create;
 338   queue_event_hooks.tracepoint_delete = queue_tracepoint_delete;
 339   queue_event_hooks.tracepoint_modify = queue_tracepoint_modify;
 340   queue_event_hooks.architecture_changed = queue_architecture_changed;
 341
 342   add_setshow_zinteger_cmd ("event", class_maintenance,
 343                             &gdb_events_debug, _("\
 344 Set event debugging."), _("\
 345 Show event debugging."), _("\
 346 When non-zero, event/notify debugging is enabled."),
 347                             NULL,
 348                             show_gdb_events_debug,
 349                             &setdebuglist, &showdebuglist);
 350 }