| 1 | /* GDB hooks for TUI. |
| 2 | |
| 3 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "symtab.h" |
| 22 | #include "inferior.h" |
| 23 | #include "command.h" |
| 24 | #include "bfd.h" |
| 25 | #include "symfile.h" |
| 26 | #include "objfiles.h" |
| 27 | #include "target.h" |
| 28 | #include "gdbcore.h" |
| 29 | #include "event-loop.h" |
| 30 | #include "event-top.h" |
| 31 | #include "frame.h" |
| 32 | #include "breakpoint.h" |
| 33 | #include "ui-out.h" |
| 34 | #include "top.h" |
| 35 | #include "observer.h" |
| 36 | #include <unistd.h> |
| 37 | #include <fcntl.h> |
| 38 | |
| 39 | #include "tui/tui.h" |
| 40 | #include "tui/tui-hooks.h" |
| 41 | #include "tui/tui-data.h" |
| 42 | #include "tui/tui-layout.h" |
| 43 | #include "tui/tui-io.h" |
| 44 | #include "tui/tui-regs.h" |
| 45 | #include "tui/tui-win.h" |
| 46 | #include "tui/tui-stack.h" |
| 47 | #include "tui/tui-windata.h" |
| 48 | #include "tui/tui-winsource.h" |
| 49 | |
| 50 | #include "gdb_curses.h" |
| 51 | |
| 52 | /* This redefines CTRL if it is not already defined, so it must come |
| 53 | after terminal state releated include files like <term.h> and |
| 54 | "gdb_curses.h". */ |
| 55 | #include "readline/readline.h" |
| 56 | |
| 57 | int tui_target_has_run = 0; |
| 58 | |
| 59 | static void |
| 60 | tui_new_objfile_hook (struct objfile* objfile) |
| 61 | { |
| 62 | if (tui_active) |
| 63 | tui_display_main (); |
| 64 | } |
| 65 | |
| 66 | /* Prevent recursion of deprecated_register_changed_hook(). */ |
| 67 | static int tui_refreshing_registers = 0; |
| 68 | |
| 69 | /* Observer for the register_changed notification. */ |
| 70 | |
| 71 | static void |
| 72 | tui_register_changed (struct frame_info *frame, int regno) |
| 73 | { |
| 74 | struct frame_info *fi; |
| 75 | |
| 76 | /* The frame of the register that was changed may differ from the selected |
| 77 | frame, but we only want to show the register values of the selected frame. |
| 78 | And even if the frames differ a register change made in one can still show |
| 79 | up in the other. So we always use the selected frame here, and ignore |
| 80 | FRAME. */ |
| 81 | fi = get_selected_frame (NULL); |
| 82 | if (tui_refreshing_registers == 0) |
| 83 | { |
| 84 | tui_refreshing_registers = 1; |
| 85 | tui_check_data_values (fi); |
| 86 | tui_refreshing_registers = 0; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | /* Breakpoint creation hook. |
| 91 | Update the screen to show the new breakpoint. */ |
| 92 | static void |
| 93 | tui_event_create_breakpoint (struct breakpoint *b) |
| 94 | { |
| 95 | tui_update_all_breakpoint_info (); |
| 96 | } |
| 97 | |
| 98 | /* Breakpoint deletion hook. |
| 99 | Refresh the screen to update the breakpoint marks. */ |
| 100 | static void |
| 101 | tui_event_delete_breakpoint (struct breakpoint *b) |
| 102 | { |
| 103 | tui_update_all_breakpoint_info (); |
| 104 | } |
| 105 | |
| 106 | static void |
| 107 | tui_event_modify_breakpoint (struct breakpoint *b) |
| 108 | { |
| 109 | tui_update_all_breakpoint_info (); |
| 110 | } |
| 111 | |
| 112 | /* Called when a command is about to proceed the inferior. */ |
| 113 | |
| 114 | static void |
| 115 | tui_about_to_proceed (void) |
| 116 | { |
| 117 | /* Leave tui mode (optional). */ |
| 118 | #if 0 |
| 119 | if (tui_active) |
| 120 | { |
| 121 | target_terminal_ours (); |
| 122 | endwin (); |
| 123 | target_terminal_inferior (); |
| 124 | } |
| 125 | #endif |
| 126 | tui_target_has_run = 1; |
| 127 | } |
| 128 | |
| 129 | /* Refresh TUI's frame and register information. This is a hook intended to be |
| 130 | used to update the screen after potential frame and register changes. |
| 131 | |
| 132 | REGISTERS_TOO_P controls whether to refresh our register information even |
| 133 | if frame information hasn't changed. */ |
| 134 | |
| 135 | static void |
| 136 | tui_refresh_frame_and_register_information (int registers_too_p) |
| 137 | { |
| 138 | struct frame_info *fi; |
| 139 | CORE_ADDR pc; |
| 140 | struct cleanup *old_chain; |
| 141 | int frame_info_changed_p; |
| 142 | |
| 143 | if (!has_stack_frames ()) |
| 144 | return; |
| 145 | |
| 146 | old_chain = make_cleanup_restore_target_terminal (); |
| 147 | target_terminal_ours_for_output (); |
| 148 | |
| 149 | fi = get_selected_frame (NULL); |
| 150 | /* Ensure that symbols for this frame are read in. Also, determine |
| 151 | the source language of this frame, and switch to it if |
| 152 | desired. */ |
| 153 | if (get_frame_pc_if_available (fi, &pc)) |
| 154 | { |
| 155 | struct symtab *s; |
| 156 | |
| 157 | s = find_pc_line_symtab (pc); |
| 158 | /* elz: This if here fixes the problem with the pc not being |
| 159 | displayed in the tui asm layout, with no debug symbols. The |
| 160 | value of s would be 0 here, and select_source_symtab would |
| 161 | abort the command by calling the 'error' function. */ |
| 162 | if (s) |
| 163 | select_source_symtab (s); |
| 164 | } |
| 165 | |
| 166 | /* Display the frame position (even if there is no symbols or the PC |
| 167 | is not known). */ |
| 168 | frame_info_changed_p = tui_show_frame_info (fi); |
| 169 | |
| 170 | /* Refresh the register window if it's visible. */ |
| 171 | if (tui_is_window_visible (DATA_WIN) |
| 172 | && (frame_info_changed_p || registers_too_p)) |
| 173 | { |
| 174 | tui_refreshing_registers = 1; |
| 175 | tui_check_data_values (fi); |
| 176 | tui_refreshing_registers = 0; |
| 177 | } |
| 178 | |
| 179 | do_cleanups (old_chain); |
| 180 | } |
| 181 | |
| 182 | /* Dummy callback for deprecated_print_frame_info_listing_hook which is called |
| 183 | from print_frame_info. */ |
| 184 | |
| 185 | static void |
| 186 | tui_dummy_print_frame_info_listing_hook (struct symtab *s, |
| 187 | int line, |
| 188 | int stopline, |
| 189 | int noerror) |
| 190 | { |
| 191 | } |
| 192 | |
| 193 | /* Perform all necessary cleanups regarding our module's inferior data |
| 194 | that is required after the inferior INF just exited. */ |
| 195 | |
| 196 | static void |
| 197 | tui_inferior_exit (struct inferior *inf) |
| 198 | { |
| 199 | /* Leave the SingleKey mode to make sure the gdb prompt is visible. */ |
| 200 | tui_set_key_mode (TUI_COMMAND_MODE); |
| 201 | tui_show_frame_info (0); |
| 202 | tui_display_main (); |
| 203 | } |
| 204 | |
| 205 | /* Observer for the before_prompt notification. */ |
| 206 | |
| 207 | static void |
| 208 | tui_before_prompt (const char *current_gdb_prompt) |
| 209 | { |
| 210 | /* This refresh is intended to catch changes to the selected frame following |
| 211 | a call to "up", "down" or "frame". As such we don't necessarily want to |
| 212 | refresh registers here unless the frame actually changed by one of these |
| 213 | commands. Registers will otherwise be refreshed after a normal stop or by |
| 214 | our tui_register_changed_hook. */ |
| 215 | tui_refresh_frame_and_register_information (/*registers_too_p=*/0); |
| 216 | } |
| 217 | |
| 218 | /* Observer for the normal_stop notification. */ |
| 219 | |
| 220 | static void |
| 221 | tui_normal_stop (struct bpstats *bs, int print_frame) |
| 222 | { |
| 223 | /* This refresh is intended to catch changes to the selected frame and to |
| 224 | registers following a normal stop. */ |
| 225 | tui_refresh_frame_and_register_information (/*registers_too_p=*/1); |
| 226 | } |
| 227 | |
| 228 | /* Observers created when installing TUI hooks. */ |
| 229 | static struct observer *tui_bp_created_observer; |
| 230 | static struct observer *tui_bp_deleted_observer; |
| 231 | static struct observer *tui_bp_modified_observer; |
| 232 | static struct observer *tui_inferior_exit_observer; |
| 233 | static struct observer *tui_about_to_proceed_observer; |
| 234 | static struct observer *tui_before_prompt_observer; |
| 235 | static struct observer *tui_normal_stop_observer; |
| 236 | static struct observer *tui_register_changed_observer; |
| 237 | |
| 238 | /* Install the TUI specific hooks. */ |
| 239 | void |
| 240 | tui_install_hooks (void) |
| 241 | { |
| 242 | /* If this hook is not set to something then print_frame_info will |
| 243 | assume that the CLI, not the TUI, is active, and will print the frame info |
| 244 | for us in such a way that we are not prepared to handle. This hook is |
| 245 | otherwise effectively obsolete. */ |
| 246 | deprecated_print_frame_info_listing_hook |
| 247 | = tui_dummy_print_frame_info_listing_hook; |
| 248 | |
| 249 | /* Install the event hooks. */ |
| 250 | tui_bp_created_observer |
| 251 | = observer_attach_breakpoint_created (tui_event_create_breakpoint); |
| 252 | tui_bp_deleted_observer |
| 253 | = observer_attach_breakpoint_deleted (tui_event_delete_breakpoint); |
| 254 | tui_bp_modified_observer |
| 255 | = observer_attach_breakpoint_modified (tui_event_modify_breakpoint); |
| 256 | tui_inferior_exit_observer |
| 257 | = observer_attach_inferior_exit (tui_inferior_exit); |
| 258 | tui_about_to_proceed_observer |
| 259 | = observer_attach_about_to_proceed (tui_about_to_proceed); |
| 260 | tui_before_prompt_observer |
| 261 | = observer_attach_before_prompt (tui_before_prompt); |
| 262 | tui_normal_stop_observer |
| 263 | = observer_attach_normal_stop (tui_normal_stop); |
| 264 | tui_register_changed_observer |
| 265 | = observer_attach_register_changed (tui_register_changed); |
| 266 | } |
| 267 | |
| 268 | /* Remove the TUI specific hooks. */ |
| 269 | void |
| 270 | tui_remove_hooks (void) |
| 271 | { |
| 272 | deprecated_print_frame_info_listing_hook = 0; |
| 273 | deprecated_query_hook = 0; |
| 274 | /* Remove our observers. */ |
| 275 | observer_detach_breakpoint_created (tui_bp_created_observer); |
| 276 | tui_bp_created_observer = NULL; |
| 277 | observer_detach_breakpoint_deleted (tui_bp_deleted_observer); |
| 278 | tui_bp_deleted_observer = NULL; |
| 279 | observer_detach_breakpoint_modified (tui_bp_modified_observer); |
| 280 | tui_bp_modified_observer = NULL; |
| 281 | observer_detach_inferior_exit (tui_inferior_exit_observer); |
| 282 | tui_inferior_exit_observer = NULL; |
| 283 | observer_detach_about_to_proceed (tui_about_to_proceed_observer); |
| 284 | tui_about_to_proceed_observer = NULL; |
| 285 | observer_detach_before_prompt (tui_before_prompt_observer); |
| 286 | tui_before_prompt_observer = NULL; |
| 287 | observer_detach_normal_stop (tui_normal_stop_observer); |
| 288 | tui_normal_stop_observer = NULL; |
| 289 | observer_detach_register_changed (tui_register_changed_observer); |
| 290 | tui_register_changed_observer = NULL; |
| 291 | } |
| 292 | |
| 293 | void _initialize_tui_hooks (void); |
| 294 | |
| 295 | void |
| 296 | _initialize_tui_hooks (void) |
| 297 | { |
| 298 | /* Install the permanent hooks. */ |
| 299 | observer_attach_new_objfile (tui_new_objfile_hook); |
| 300 | } |