gdb/tui/tui-hooks.c

   1 /* GDB hooks for TUI.
   2
   3    Copyright 2001, 2002, 2003, 2004 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 2 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, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "symtab.h"
  24 #include "inferior.h"
  25 #include "command.h"
  26 #include "bfd.h"
  27 #include "symfile.h"
  28 #include "objfiles.h"
  29 #include "target.h"
  30 #include "gdbcore.h"
  31 #include "event-loop.h"
  32 #include "event-top.h"
  33 #include "frame.h"
  34 #include "breakpoint.h"
  35 #include "gdb-events.h"
  36 #include "ui-out.h"
  37 #include "top.h"
  38 #include <readline/readline.h>
  39 #include <unistd.h>
  40 #include <fcntl.h>
  41
  42 #include "tui/tui.h"
  43 #include "tui/tui-hooks.h"
  44 #include "tui/tui-data.h"
  45 #include "tui/tui-layout.h"
  46 #include "tui/tui-io.h"
  47 #include "tui/tui-regs.h"
  48 #include "tui/tui-win.h"
  49 #include "tui/tui-stack.h"
  50 #include "tui/tui-windata.h"
  51 #include "tui/tui-winsource.h"
  52
  53 #include "gdb_curses.h"
  54
  55 int tui_target_has_run = 0;
  56
  57 static void (* tui_target_new_objfile_chain) (struct objfile*);
  58
  59 static void
  60 tui_new_objfile_hook (struct objfile* objfile)
  61 {
  62   if (tui_active)
  63     tui_display_main ();
  64
  65   if (tui_target_new_objfile_chain)
  66     tui_target_new_objfile_chain (objfile);
  67 }
  68
  69 static int
  70 tui_query_hook (const char * msg, va_list argp)
  71 {
  72   int retval;
  73   int ans2;
  74   int answer;
  75
  76   /* Automatically answer "yes" if input is not from a terminal.  */
  77   if (!input_from_terminal_p ())
  78     return 1;
  79
  80   echo ();
  81   while (1)
  82     {
  83       wrap_here ("");           /* Flush any buffered output */
  84       gdb_flush (gdb_stdout);
  85
  86       vfprintf_filtered (gdb_stdout, msg, argp);
  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   return retval;
 124 }
 125
 126 /* Prevent recursion of registers_changed_hook().  */
 127 static int tui_refreshing_registers = 0;
 128
 129 static void
 130 tui_registers_changed_hook (void)
 131 {
 132   struct frame_info *fi;
 133
 134   fi = deprecated_selected_frame;
 135   if (fi && tui_refreshing_registers == 0)
 136     {
 137       tui_refreshing_registers = 1;
 138 #if 0
 139       tui_check_data_values (fi);
 140 #endif
 141       tui_refreshing_registers = 0;
 142     }
 143 }
 144
 145 static void
 146 tui_register_changed_hook (int regno)
 147 {
 148   struct frame_info *fi;
 149
 150   fi = deprecated_selected_frame;
 151   if (fi && tui_refreshing_registers == 0)
 152     {
 153       tui_refreshing_registers = 1;
 154       tui_check_data_values (fi);
 155       tui_refreshing_registers = 0;
 156     }
 157 }
 158
 159 /* Breakpoint creation hook.
 160    Update the screen to show the new breakpoint.  */
 161 static void
 162 tui_event_create_breakpoint (int number)
 163 {
 164   tui_update_all_breakpoint_info ();
 165 }
 166
 167 /* Breakpoint deletion hook.
 168    Refresh the screen to update the breakpoint marks.  */
 169 static void
 170 tui_event_delete_breakpoint (int number)
 171 {
 172   tui_update_all_breakpoint_info ();
 173 }
 174
 175 static void
 176 tui_event_modify_breakpoint (int number)
 177 {
 178   tui_update_all_breakpoint_info ();
 179 }
 180
 181 static void
 182 tui_event_default (int number)
 183 {
 184   ;
 185 }
 186
 187 static struct gdb_events *tui_old_event_hooks;
 188
 189 static struct gdb_events tui_event_hooks =
 190 {
 191   tui_event_create_breakpoint,
 192   tui_event_delete_breakpoint,
 193   tui_event_modify_breakpoint,
 194   tui_event_default,
 195   tui_event_default,
 196   tui_event_default
 197 };
 198
 199 /* Called when going to wait for the target.
 200    Leave curses mode and setup program mode.  */
 201 static ptid_t
 202 tui_target_wait_hook (ptid_t pid, struct target_waitstatus *status)
 203 {
 204   ptid_t res;
 205
 206   /* Leave tui mode (optional).  */
 207 #if 0
 208   if (tui_active)
 209     {
 210       target_terminal_ours ();
 211       endwin ();
 212       target_terminal_inferior ();
 213     }
 214 #endif
 215   tui_target_has_run = 1;
 216   res = target_wait (pid, status);
 217
 218   if (tui_active)
 219     {
 220       /* TODO: need to refresh (optional).  */
 221     }
 222   return res;
 223 }
 224
 225 /* The selected frame has changed.  This is happens after a target
 226    stop or when the user explicitly changes the frame (up/down/thread/...).  */
 227 static void
 228 tui_selected_frame_level_changed_hook (int level)
 229 {
 230   struct frame_info *fi;
 231
 232   fi = deprecated_selected_frame;
 233   /* Ensure that symbols for this frame are read in.  Also, determine the
 234      source language of this frame, and switch to it if desired.  */
 235   if (fi)
 236     {
 237       struct symtab *s;
 238
 239       s = find_pc_symtab (get_frame_pc (fi));
 240       /* elz: this if here fixes the problem with the pc not being displayed
 241          in the tui asm layout, with no debug symbols. The value of s
 242          would be 0 here, and select_source_symtab would abort the
 243          command by calling the 'error' function */
 244       if (s)
 245         select_source_symtab (s);
 246
 247       /* Display the frame position (even if there is no symbols).  */
 248       tui_show_frame_info (fi);
 249
 250       /* Refresh the register window if it's visible.  */
 251       if (tui_is_window_visible (DATA_WIN))
 252         {
 253           tui_refreshing_registers = 1;
 254           tui_check_data_values (fi);
 255           tui_refreshing_registers = 0;
 256         }
 257     }
 258 }
 259
 260 /* Called from print_frame_info to list the line we stopped in.  */
 261 static void
 262 tui_print_frame_info_listing_hook (struct symtab *s, int line,
 263                                    int stopline, int noerror)
 264 {
 265   select_source_symtab (s);
 266   tui_show_frame_info (deprecated_selected_frame);
 267 }
 268
 269 /* Called when the target process died or is detached.
 270    Update the status line.  */
 271 static void
 272 tui_detach_hook (void)
 273 {
 274   tui_show_frame_info (0);
 275   tui_display_main ();
 276 }
 277
 278 /* Install the TUI specific hooks.  */
 279 void
 280 tui_install_hooks (void)
 281 {
 282   target_wait_hook = tui_target_wait_hook;
 283   selected_frame_level_changed_hook = tui_selected_frame_level_changed_hook;
 284   print_frame_info_listing_hook = tui_print_frame_info_listing_hook;
 285
 286   query_hook = tui_query_hook;
 287
 288   /* Install the event hooks.  */
 289   tui_old_event_hooks = set_gdb_event_hooks (&tui_event_hooks);
 290
 291   registers_changed_hook = tui_registers_changed_hook;
 292   register_changed_hook = tui_register_changed_hook;
 293   detach_hook = tui_detach_hook;
 294 }
 295
 296 /* Remove the TUI specific hooks.  */
 297 void
 298 tui_remove_hooks (void)
 299 {
 300   target_wait_hook = 0;
 301   selected_frame_level_changed_hook = 0;
 302   print_frame_info_listing_hook = 0;
 303   query_hook = 0;
 304   registers_changed_hook = 0;
 305   register_changed_hook = 0;
 306   detach_hook = 0;
 307
 308   /* Restore the previous event hooks.  */
 309   set_gdb_event_hooks (tui_old_event_hooks);
 310 }
 311
 312 void _initialize_tui_hooks (void);
 313
 314 void
 315 _initialize_tui_hooks (void)
 316 {
 317   /* Install the permanent hooks.  */
 318   tui_target_new_objfile_chain = target_new_objfile_hook;
 319   target_new_objfile_hook = tui_new_objfile_hook;
 320 }