| 1 | /* User Interface Events. |
| 2 | Copyright 1999 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 | #endif |
| 85 | |
| 86 | #if WITH_GDB_EVENTS |
| 87 | struct gdb_events * |
| 88 | set_gdb_event_hooks (struct gdb_events *vector) |
| 89 | { |
| 90 | struct gdb_events *old_events = current_event_hooks; |
| 91 | if (vector == NULL) |
| 92 | current_event_hooks = &queue_event_hooks; |
| 93 | else |
| 94 | current_event_hooks = vector; |
| 95 | return old_events; |
| 96 | } |
| 97 | #endif |
| 98 | |
| 99 | enum gdb_event |
| 100 | { |
| 101 | breakpoint_create, |
| 102 | breakpoint_delete, |
| 103 | breakpoint_modify, |
| 104 | nr_gdb_events |
| 105 | }; |
| 106 | |
| 107 | struct breakpoint_create |
| 108 | { |
| 109 | int b; |
| 110 | }; |
| 111 | |
| 112 | struct breakpoint_delete |
| 113 | { |
| 114 | int b; |
| 115 | }; |
| 116 | |
| 117 | struct breakpoint_modify |
| 118 | { |
| 119 | int b; |
| 120 | }; |
| 121 | |
| 122 | struct event |
| 123 | { |
| 124 | enum gdb_event type; |
| 125 | struct event *next; |
| 126 | union |
| 127 | { |
| 128 | struct breakpoint_create breakpoint_create; |
| 129 | struct breakpoint_delete breakpoint_delete; |
| 130 | struct breakpoint_modify breakpoint_modify; |
| 131 | } |
| 132 | data; |
| 133 | }; |
| 134 | struct event *pending_events; |
| 135 | struct event *delivering_events; |
| 136 | |
| 137 | static void |
| 138 | append (struct event *new_event) |
| 139 | { |
| 140 | struct event **event = &pending_events; |
| 141 | while ((*event) != NULL) |
| 142 | event = &((*event)->next); |
| 143 | (*event) = new_event; |
| 144 | (*event)->next = NULL; |
| 145 | } |
| 146 | |
| 147 | static void |
| 148 | queue_breakpoint_create (int b) |
| 149 | { |
| 150 | struct event *event = XMALLOC (struct event); |
| 151 | event->type = breakpoint_create; |
| 152 | event->data.breakpoint_create.b = b; |
| 153 | append (event); |
| 154 | } |
| 155 | |
| 156 | static void |
| 157 | queue_breakpoint_delete (int b) |
| 158 | { |
| 159 | struct event *event = XMALLOC (struct event); |
| 160 | event->type = breakpoint_delete; |
| 161 | event->data.breakpoint_delete.b = b; |
| 162 | append (event); |
| 163 | } |
| 164 | |
| 165 | static void |
| 166 | queue_breakpoint_modify (int b) |
| 167 | { |
| 168 | struct event *event = XMALLOC (struct event); |
| 169 | event->type = breakpoint_modify; |
| 170 | event->data.breakpoint_modify.b = b; |
| 171 | append (event); |
| 172 | } |
| 173 | |
| 174 | void |
| 175 | gdb_events_deliver (struct gdb_events *vector) |
| 176 | { |
| 177 | /* Just zap any events left around from last time. */ |
| 178 | while (delivering_events != NULL) |
| 179 | { |
| 180 | struct event *event = delivering_events; |
| 181 | delivering_events = event->next; |
| 182 | free (event); |
| 183 | } |
| 184 | /* Process any pending events. Because one of the deliveries could |
| 185 | bail out we move everything off of the pending queue onto an |
| 186 | in-progress queue where it can, later, be cleaned up if |
| 187 | necessary. */ |
| 188 | delivering_events = pending_events; |
| 189 | pending_events = NULL; |
| 190 | while (delivering_events != NULL) |
| 191 | { |
| 192 | struct event *event = delivering_events; |
| 193 | switch (event->type) |
| 194 | { |
| 195 | case breakpoint_create: |
| 196 | vector->breakpoint_create |
| 197 | (event->data.breakpoint_create.b); |
| 198 | break; |
| 199 | case breakpoint_delete: |
| 200 | vector->breakpoint_delete |
| 201 | (event->data.breakpoint_delete.b); |
| 202 | break; |
| 203 | case breakpoint_modify: |
| 204 | vector->breakpoint_modify |
| 205 | (event->data.breakpoint_modify.b); |
| 206 | break; |
| 207 | } |
| 208 | delivering_events = event->next; |
| 209 | free (event); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | void _initialize_gdb_events (void); |
| 214 | void |
| 215 | _initialize_gdb_events (void) |
| 216 | { |
| 217 | struct cmd_list_element *c; |
| 218 | #if WITH_GDB_EVENTS |
| 219 | queue_event_hooks.breakpoint_create = queue_breakpoint_create; |
| 220 | queue_event_hooks.breakpoint_delete = queue_breakpoint_delete; |
| 221 | queue_event_hooks.breakpoint_modify = queue_breakpoint_modify; |
| 222 | #endif |
| 223 | |
| 224 | c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger, |
| 225 | (char *) (&gdb_events_debug), "Set event debugging.\n\ |
| 226 | When non-zero, event/notify debugging is enabled.", &setlist); |
| 227 | deprecate_cmd (c, "set debug event"); |
| 228 | deprecate_cmd (add_show_from_set (c, &showlist), "show debug event"); |
| 229 | |
| 230 | add_show_from_set (add_set_cmd ("event", |
| 231 | class_maintenance, |
| 232 | var_zinteger, |
| 233 | (char *) (&gdb_events_debug), |
| 234 | "Set event debugging.\n\ |
| 235 | When non-zero, event/notify debugging is enabled.", &setdebuglist), |
| 236 | &showdebuglist); |
| 237 | } |