gdb/tui/tui-hooks.c

   1 /* GDB hooks for TUI.
   2
   3    Copyright (C) 2001-2012 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 static int ATTRIBUTE_PRINTF (1, 0)
  67 tui_query_hook (const char *msg, va_list argp)
  68 {
  69   int retval;
  70   int ans2;
  71   int answer;
  72   char *question;
  73   struct cleanup *old_chain;
  74
  75   /* Format the question outside of the loop, to avoid reusing
  76      ARGP.  */
  77   question = xstrvprintf (msg, argp);
  78   old_chain = make_cleanup (xfree, question);
  79
  80   echo ();
  81   while (1)
  82     {
  83       wrap_here ("");           /* Flush any buffered output.  */
  84       gdb_flush (gdb_stdout);
  85
  86       fputs_filtered (question, gdb_stdout);
  87       printf_filtered (_("(y or n) "));
  88
  89       wrap_here ("");
  90       gdb_flush (gdb_stdout);
  91
  92       answer = tui_getc (stdin);
  93       clearerr (stdin);         /* in case of C-d */
  94       if (answer == EOF)        /* C-d */
  95         {
  96           retval = 1;
  97           break;
  98         }
  99       /* Eat rest of input line, to EOF or newline.  */
 100       if (answer != '\n')
 101         do
 102           {
 103             ans2 = tui_getc (stdin);
 104             clearerr (stdin);
 105           }
 106         while (ans2 != EOF && ans2 != '\n' && ans2 != '\r');
 107
 108       if (answer >= 'a')
 109         answer -= 040;
 110       if (answer == 'Y')
 111         {
 112           retval = 1;
 113           break;
 114         }
 115       if (answer == 'N')
 116         {
 117           retval = 0;
 118           break;
 119         }
 120       printf_filtered (_("Please answer y or n.\n"));
 121     }
 122   noecho ();
 123
 124   do_cleanups (old_chain);
 125   return retval;
 126 }
 127
 128 /* Prevent recursion of deprecated_register_changed_hook().  */
 129 static int tui_refreshing_registers = 0;
 130
 131 static void
 132 tui_register_changed_hook (int regno)
 133 {
 134   struct frame_info *fi;
 135
 136   fi = get_selected_frame (NULL);
 137   if (tui_refreshing_registers == 0)
 138     {
 139       tui_refreshing_registers = 1;
 140       tui_check_data_values (fi);
 141       tui_refreshing_registers = 0;
 142     }
 143 }
 144
 145 /* Breakpoint creation hook.
 146    Update the screen to show the new breakpoint.  */
 147 static void
 148 tui_event_create_breakpoint (struct breakpoint *b)
 149 {
 150   tui_update_all_breakpoint_info ();
 151 }
 152
 153 /* Breakpoint deletion hook.
 154    Refresh the screen to update the breakpoint marks.  */
 155 static void
 156 tui_event_delete_breakpoint (struct breakpoint *b)
 157 {
 158   tui_update_all_breakpoint_info ();
 159 }
 160
 161 static void
 162 tui_event_modify_breakpoint (struct breakpoint *b)
 163 {
 164   tui_update_all_breakpoint_info ();
 165 }
 166
 167 /* Called when going to wait for the target.
 168    Leave curses mode and setup program mode.  */
 169 static ptid_t
 170 tui_target_wait_hook (ptid_t pid,
 171                       struct target_waitstatus *status, int options)
 172 {
 173   ptid_t res;
 174
 175   /* Leave tui mode (optional).  */
 176 #if 0
 177   if (tui_active)
 178     {
 179       target_terminal_ours ();
 180       endwin ();
 181       target_terminal_inferior ();
 182     }
 183 #endif
 184   tui_target_has_run = 1;
 185   res = target_wait (pid, status, options);
 186
 187   if (tui_active)
 188     {
 189       /* TODO: need to refresh (optional).  */
 190     }
 191   return res;
 192 }
 193
 194 /* The selected frame has changed.  This is happens after a target
 195    stop or when the user explicitly changes the frame
 196    (up/down/thread/...).  */
 197 static void
 198 tui_selected_frame_level_changed_hook (int level)
 199 {
 200   struct frame_info *fi;
 201   CORE_ADDR pc;
 202
 203   /* Negative level means that the selected frame was cleared.  */
 204   if (level < 0)
 205     return;
 206
 207   fi = get_selected_frame (NULL);
 208   /* Ensure that symbols for this frame are read in.  Also, determine
 209      the source language of this frame, and switch to it if
 210      desired.  */
 211   if (get_frame_pc_if_available (fi, &pc))
 212     {
 213       struct symtab *s;
 214
 215       s = find_pc_symtab (pc);
 216       /* elz: This if here fixes the problem with the pc not being
 217          displayed in the tui asm layout, with no debug symbols.  The
 218          value of s would be 0 here, and select_source_symtab would
 219          abort the command by calling the 'error' function.  */
 220       if (s)
 221         select_source_symtab (s);
 222     }
 223
 224   /* Display the frame position (even if there is no symbols or the PC
 225      is not known).  */
 226   tui_show_frame_info (fi);
 227
 228   /* Refresh the register window if it's visible.  */
 229   if (tui_is_window_visible (DATA_WIN))
 230     {
 231       tui_refreshing_registers = 1;
 232       tui_check_data_values (fi);
 233       tui_refreshing_registers = 0;
 234     }
 235 }
 236
 237 /* Called from print_frame_info to list the line we stopped in.  */
 238 static void
 239 tui_print_frame_info_listing_hook (struct symtab *s,
 240                                    int line,
 241                                    int stopline,
 242                                    int noerror)
 243 {
 244   select_source_symtab (s);
 245   tui_show_frame_info (get_selected_frame (NULL));
 246 }
 247
 248 /* Perform all necessary cleanups regarding our module's inferior data
 249    that is required after the inferior INF just exited.  */
 250
 251 static void
 252 tui_inferior_exit (struct inferior *inf)
 253 {
 254   /* Leave the SingleKey mode to make sure the gdb prompt is visible.  */
 255   tui_set_key_mode (TUI_COMMAND_MODE);
 256   tui_show_frame_info (0);
 257   tui_display_main ();
 258 }
 259
 260 /* Observers created when installing TUI hooks.  */
 261 static struct observer *tui_bp_created_observer;
 262 static struct observer *tui_bp_deleted_observer;
 263 static struct observer *tui_bp_modified_observer;
 264 static struct observer *tui_inferior_exit_observer;
 265
 266 /* Install the TUI specific hooks.  */
 267 void
 268 tui_install_hooks (void)
 269 {
 270   deprecated_target_wait_hook = tui_target_wait_hook;
 271   deprecated_selected_frame_level_changed_hook
 272     = tui_selected_frame_level_changed_hook;
 273   deprecated_print_frame_info_listing_hook
 274     = tui_print_frame_info_listing_hook;
 275
 276   deprecated_query_hook = tui_query_hook;
 277
 278   /* Install the event hooks.  */
 279   tui_bp_created_observer
 280     = observer_attach_breakpoint_created (tui_event_create_breakpoint);
 281   tui_bp_deleted_observer
 282     = observer_attach_breakpoint_deleted (tui_event_delete_breakpoint);
 283   tui_bp_modified_observer
 284     = observer_attach_breakpoint_modified (tui_event_modify_breakpoint);
 285   tui_inferior_exit_observer
 286     = observer_attach_inferior_exit (tui_inferior_exit);
 287
 288   deprecated_register_changed_hook = tui_register_changed_hook;
 289 }
 290
 291 /* Remove the TUI specific hooks.  */
 292 void
 293 tui_remove_hooks (void)
 294 {
 295   deprecated_target_wait_hook = 0;
 296   deprecated_selected_frame_level_changed_hook = 0;
 297   deprecated_print_frame_info_listing_hook = 0;
 298   deprecated_query_hook = 0;
 299   deprecated_register_changed_hook = 0;
 300
 301   /* Remove our observers.  */
 302   observer_detach_breakpoint_created (tui_bp_created_observer);
 303   tui_bp_created_observer = NULL;
 304   observer_detach_breakpoint_deleted (tui_bp_deleted_observer);
 305   tui_bp_deleted_observer = NULL;
 306   observer_detach_breakpoint_modified (tui_bp_modified_observer);
 307   tui_bp_modified_observer = NULL;
 308   observer_detach_inferior_exit (tui_inferior_exit_observer);
 309   tui_inferior_exit_observer = NULL;
 310 }
 311
 312 void _initialize_tui_hooks (void);
 313
 314 void
 315 _initialize_tui_hooks (void)
 316 {
 317   /* Install the permanent hooks.  */
 318   observer_attach_new_objfile (tui_new_objfile_hook);
 319 }