/* General functions for the WDB TUI. Copyright (C) 1998-2017 Free Software Foundation, Inc. Contributed by Hewlett-Packard Company. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include "defs.h" #include "gdbcmd.h" #include "tui/tui.h" #include "tui/tui-hooks.h" #include "tui/tui-data.h" #include "tui/tui-layout.h" #include "tui/tui-io.h" #include "tui/tui-regs.h" #include "tui/tui-stack.h" #include "tui/tui-win.h" #include "tui/tui-winsource.h" #include "tui/tui-windata.h" #include "target.h" #include "frame.h" #include "breakpoint.h" #include "inferior.h" #include "symtab.h" #include "source.h" #include "terminal.h" #include "top.h" #include #include #include #if 0 #include #endif #include #include "gdb_curses.h" #include "interps.h" /* This redefines CTRL if it is not already defined, so it must come after terminal state releated include files like and "gdb_curses.h". */ #include "readline/readline.h" /* Tells whether the TUI is active or not. */ int tui_active = 0; static int tui_finish_init = 1; enum tui_key_mode tui_current_key_mode = TUI_COMMAND_MODE; struct tui_char_command { unsigned char key; const char *cmd; }; /* Key mapping to gdb commands when the TUI is using the single key mode. */ static const struct tui_char_command tui_commands[] = { { 'c', "continue" }, { 'd', "down" }, { 'f', "finish" }, { 'n', "next" }, { 'o', "nexti" }, { 'r', "run" }, { 's', "step" }, { 'i', "stepi" }, { 'u', "up" }, { 'v', "info locals" }, { 'w', "where" }, { 0, 0 }, }; static Keymap tui_keymap; static Keymap tui_readline_standard_keymap; /* TUI readline command. Switch the output mode between TUI/standard gdb. */ static int tui_rl_switch_mode (int notused1, int notused2) { /* Don't let exceptions escape. We're in the middle of a readline callback that isn't prepared for that. */ TRY { if (tui_active) { tui_disable (); rl_prep_terminal (0); } else { /* If tui_enable throws, we'll re-prep below. */ rl_deprep_terminal (); tui_enable (); } } CATCH (ex, RETURN_MASK_ALL) { exception_print (gdb_stderr, ex); if (!tui_active) rl_prep_terminal (0); } END_CATCH /* Clear the readline in case switching occurred in middle of something. */ if (rl_end) rl_kill_text (0, rl_end); /* Since we left the curses mode, the terminal mode is restored to some previous state. That state may not be suitable for readline to work correctly (it may be restored in line mode). We force an exit of the current readline so that readline is re-entered and it will be able to setup the terminal for its needs. By re-entering in readline, we also redisplay its prompt in the non-curses mode. */ rl_newline (1, '\n'); /* Make sure the \n we are returning does not repeat the last command. */ dont_repeat (); return 0; } /* TUI readline command. Change the TUI layout to show a next layout. This function is bound to CTRL-X 2. It is intended to provide a functionality close to the Emacs split-window command. We always show two windows (src+asm), (src+regs) or (asm+regs). */ static int tui_rl_change_windows (int notused1, int notused2) { if (!tui_active) tui_rl_switch_mode (0 /* notused */, 0 /* notused */); if (tui_active) { enum tui_layout_type new_layout; new_layout = tui_current_layout (); /* Select a new layout to have a rolling layout behavior with always two windows (except when undefined). */ switch (new_layout) { case SRC_COMMAND: new_layout = SRC_DISASSEM_COMMAND; break; case DISASSEM_COMMAND: new_layout = SRC_DISASSEM_COMMAND; break; case SRC_DATA_COMMAND: new_layout = SRC_DISASSEM_COMMAND; break; case SRC_DISASSEM_COMMAND: new_layout = DISASSEM_DATA_COMMAND; break; case DISASSEM_DATA_COMMAND: new_layout = SRC_DATA_COMMAND; break; default: new_layout = SRC_COMMAND; break; } tui_set_layout (new_layout); } return 0; } /* TUI readline command. Delete the second TUI window to only show one. */ static int tui_rl_delete_other_windows (int notused1, int notused2) { if (!tui_active) tui_rl_switch_mode (0 /* notused */, 0 /* notused */); if (tui_active) { enum tui_layout_type new_layout; new_layout = tui_current_layout (); /* Kill one window. */ switch (new_layout) { case SRC_COMMAND: case SRC_DATA_COMMAND: case SRC_DISASSEM_COMMAND: default: new_layout = SRC_COMMAND; break; case DISASSEM_COMMAND: case DISASSEM_DATA_COMMAND: new_layout = DISASSEM_COMMAND; break; } tui_set_layout (new_layout); } return 0; } /* TUI readline command. Switch the active window to give the focus to a next window. */ static int tui_rl_other_window (int count, int key) { struct tui_win_info *win_info; if (!tui_active) tui_rl_switch_mode (0 /* notused */, 0 /* notused */); win_info = tui_next_win (tui_win_with_focus ()); if (win_info) { tui_set_win_focus_to (win_info); if (TUI_DATA_WIN && TUI_DATA_WIN->generic.is_visible) tui_refresh_data_win (); keypad (TUI_CMD_WIN->generic.handle, (win_info != TUI_CMD_WIN)); } return 0; } /* TUI readline command. Execute the gdb command bound to the specified key. */ static int tui_rl_command_key (int count, int key) { int i; reinitialize_more_filter (); for (i = 0; tui_commands[i].cmd; i++) { if (tui_commands[i].key == key) { /* Insert the command in the readline buffer. Avoid calling the gdb command here since it creates a possible recursion on readline if prompt_for_continue is called (See PR 9584). The command will also appear in the readline history which turns out to be better. */ rl_insert_text (tui_commands[i].cmd); rl_newline (1, '\n'); /* Switch to gdb command mode while executing the command. This way the gdb's continue prompty will be displayed. */ tui_set_key_mode (TUI_ONE_COMMAND_MODE); return 0; } } return 0; } /* TUI readline command. Temporarily leave the TUI SingleKey mode to allow editing a gdb command with the normal readline. Once the command is executed, the TUI SingleKey mode is installed back. */ static int tui_rl_command_mode (int count, int key) { tui_set_key_mode (TUI_ONE_COMMAND_MODE); return rl_insert (count, key); } /* TUI readline command. Switch between TUI SingleKey mode and gdb readline editing. */ static int tui_rl_next_keymap (int notused1, int notused2) { if (!tui_active) tui_rl_switch_mode (0 /* notused */, 0 /* notused */); tui_set_key_mode (tui_current_key_mode == TUI_COMMAND_MODE ? TUI_SINGLE_KEY_MODE : TUI_COMMAND_MODE); return 0; } /* Readline hook to redisplay ourself the gdb prompt. In the SingleKey mode, the prompt is not printed so that the command window is cleaner. It will be displayed if we temporarily leave the SingleKey mode. */ static int tui_rl_startup_hook (void) { rl_already_prompted = 1; if (tui_current_key_mode != TUI_COMMAND_MODE && !gdb_in_secondary_prompt_p (current_ui)) tui_set_key_mode (TUI_SINGLE_KEY_MODE); tui_redisplay_readline (); return 0; } /* Change the TUI key mode by installing the appropriate readline keymap. */ void tui_set_key_mode (enum tui_key_mode mode) { tui_current_key_mode = mode; rl_set_keymap (mode == TUI_SINGLE_KEY_MODE ? tui_keymap : tui_readline_standard_keymap); tui_show_locator_content (); } /* Initialize readline and configure the keymap for the switching key shortcut. */ void tui_initialize_readline (void) { int i; Keymap tui_ctlx_keymap; rl_initialize (); rl_add_defun ("tui-switch-mode", tui_rl_switch_mode, -1); rl_add_defun ("gdb-command", tui_rl_command_key, -1); rl_add_defun ("next-keymap", tui_rl_next_keymap, -1); tui_keymap = rl_make_bare_keymap (); tui_ctlx_keymap = rl_make_bare_keymap (); tui_readline_standard_keymap = rl_get_keymap (); for (i = 0; tui_commands[i].cmd; i++) rl_bind_key_in_map (tui_commands[i].key, tui_rl_command_key, tui_keymap); rl_generic_bind (ISKMAP, "\\C-x", (char*) tui_ctlx_keymap, tui_keymap); /* Bind all other keys to tui_rl_command_mode so that we switch temporarily from SingleKey mode and can enter a gdb command. */ for (i = ' '; i < 0x7f; i++) { int j; for (j = 0; tui_commands[j].cmd; j++) if (tui_commands[j].key == i) break; if (tui_commands[j].cmd) continue; rl_bind_key_in_map (i, tui_rl_command_mode, tui_keymap); } rl_bind_key_in_map ('a', tui_rl_switch_mode, emacs_ctlx_keymap); rl_bind_key_in_map ('a', tui_rl_switch_mode, tui_ctlx_keymap); rl_bind_key_in_map ('A', tui_rl_switch_mode, emacs_ctlx_keymap); rl_bind_key_in_map ('A', tui_rl_switch_mode, tui_ctlx_keymap); rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, emacs_ctlx_keymap); rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, tui_ctlx_keymap); rl_bind_key_in_map ('1', tui_rl_delete_other_windows, emacs_ctlx_keymap); rl_bind_key_in_map ('1', tui_rl_delete_other_windows, tui_ctlx_keymap); rl_bind_key_in_map ('2', tui_rl_change_windows, emacs_ctlx_keymap); rl_bind_key_in_map ('2', tui_rl_change_windows, tui_ctlx_keymap); rl_bind_key_in_map ('o', tui_rl_other_window, emacs_ctlx_keymap); rl_bind_key_in_map ('o', tui_rl_other_window, tui_ctlx_keymap); rl_bind_key_in_map ('q', tui_rl_next_keymap, tui_keymap); rl_bind_key_in_map ('s', tui_rl_next_keymap, emacs_ctlx_keymap); rl_bind_key_in_map ('s', tui_rl_next_keymap, tui_ctlx_keymap); } /* Return the TERM variable from the environment, or "" if not set. */ static const char * gdb_getenv_term (void) { const char *term; term = getenv ("TERM"); if (term != NULL) return term; return ""; } /* Enter in the tui mode (curses). When in normal mode, it installs the tui hooks in gdb, redirects the gdb output, configures the readline to work in tui mode. When in curses mode, it does nothing. */ void tui_enable (void) { if (tui_active) return; /* To avoid to initialize curses when gdb starts, there is a defered curses initialization. This initialization is made only once and the first time the curses mode is entered. */ if (tui_finish_init) { WINDOW *w; SCREEN *s; const char *cap; const char *interp; /* If the top level interpreter is not the console/tui (e.g., MI), enabling curses will certainly lose. */ interp = interp_name (top_level_interpreter ()); if (strcmp (interp, INTERP_TUI) != 0) error (_("Cannot enable the TUI when the interpreter is '%s'"), interp); /* Don't try to setup curses (and print funny control characters) if we're not outputting to a terminal. */ if (!ui_file_isatty (gdb_stdout)) error (_("Cannot enable the TUI when output is not a terminal")); s = newterm (NULL, stdout, stdin); #ifdef __MINGW32__ /* The MinGW port of ncurses requires $TERM to be unset in order to activate the Windows console driver. */ if (s == NULL) s = newterm ((char *) "unknown", stdout, stdin); #endif if (s == NULL) { error (_("Cannot enable the TUI: error opening terminal [TERM=%s]"), gdb_getenv_term ()); } w = stdscr; /* Check required terminal capabilities. The MinGW port of ncurses does have them, but doesn't expose them through "cup". */ #ifndef __MINGW32__ cap = tigetstr ((char *) "cup"); if (cap == NULL || cap == (char *) -1 || *cap == '\0') { endwin (); delscreen (s); error (_("Cannot enable the TUI: " "terminal doesn't support cursor addressing [TERM=%s]"), gdb_getenv_term ()); } #endif cbreak (); noecho (); /* timeout (1); */ nodelay(w, FALSE); nl(); keypad (w, TRUE); rl_initialize (); tui_set_term_height_to (LINES); tui_set_term_width_to (COLS); def_prog_mode (); tui_show_frame_info (0); tui_set_layout (SRC_COMMAND); tui_set_win_focus_to (TUI_SRC_WIN); keypad (TUI_CMD_WIN->generic.handle, TRUE); wrefresh (TUI_CMD_WIN->generic.handle); tui_finish_init = 0; } else { /* Save the current gdb setting of the terminal. Curses will restore this state when endwin() is called. */ def_shell_mode (); clearok (stdscr, TRUE); } /* Install the TUI specific hooks. */ tui_install_hooks (); rl_startup_hook = tui_rl_startup_hook; tui_update_variables (); tui_setup_io (1); tui_active = 1; /* Resize windows before anything might display/refresh a window. */ if (tui_win_resized ()) { tui_set_win_resized_to (FALSE); tui_resize_all (); } if (deprecated_safe_get_selected_frame ()) tui_show_frame_info (deprecated_safe_get_selected_frame ()); /* Restore TUI keymap. */ tui_set_key_mode (tui_current_key_mode); /* Refresh the screen. */ tui_refresh_all_win (); /* Update gdb's knowledge of its terminal. */ gdb_save_tty_state (); tui_update_gdb_sizes (); } /* Leave the tui mode. Remove the tui hooks and configure the gdb output and readline back to their original state. The curses mode is left so that the terminal setting is restored to the point when we entered. */ void tui_disable (void) { if (!tui_active) return; /* Restore initial readline keymap. */ rl_set_keymap (tui_readline_standard_keymap); /* Remove TUI hooks. */ tui_remove_hooks (); rl_startup_hook = 0; rl_already_prompted = 0; /* Leave curses and restore previous gdb terminal setting. */ endwin (); /* gdb terminal has changed, update gdb internal copy of it so that terminal management with the inferior works. */ tui_setup_io (0); /* Update gdb's knowledge of its terminal. */ gdb_save_tty_state (); tui_active = 0; tui_update_gdb_sizes (); } /* Command wrapper for enabling tui mode. */ static void tui_enable_command (char *args, int from_tty) { tui_enable (); } /* Command wrapper for leaving tui mode. */ static void tui_disable_command (char *args, int from_tty) { tui_disable (); } void strcat_to_buf (char *buf, int buflen, const char *item_to_add) { if (item_to_add != (char *) NULL && buf != (char *) NULL) { if ((strlen (buf) + strlen (item_to_add)) <= buflen) strcat (buf, item_to_add); else strncat (buf, item_to_add, (buflen - strlen (buf))); } } #if 0 /* Solaris defines CTRL. */ #ifndef CTRL #define CTRL(x) (x & ~0140) #endif #define FILEDES 2 #define CHK(val, dft) (val<=0 ? dft : val) static void tui_reset (void) { struct termio mode; /* Reset the teletype mode bits to a sensible state. Copied tset.c. */ #if defined (TIOCGETC) struct tchars tbuf; #endif /* TIOCGETC */ #ifdef UCB_NTTY struct ltchars ltc; if (ldisc == NTTYDISC) { ioctl (FILEDES, TIOCGLTC, <c); ltc.t_suspc = CHK (ltc.t_suspc, CTRL ('Z')); ltc.t_dsuspc = CHK (ltc.t_dsuspc, CTRL ('Y')); ltc.t_rprntc = CHK (ltc.t_rprntc, CTRL ('R')); ltc.t_flushc = CHK (ltc.t_flushc, CTRL ('O')); ltc.t_werasc = CHK (ltc.t_werasc, CTRL ('W')); ltc.t_lnextc = CHK (ltc.t_lnextc, CTRL ('V')); ioctl (FILEDES, TIOCSLTC, <c); } #endif /* UCB_NTTY */ #ifdef TIOCGETC ioctl (FILEDES, TIOCGETC, &tbuf); tbuf.t_intrc = CHK (tbuf.t_intrc, CTRL ('?')); tbuf.t_quitc = CHK (tbuf.t_quitc, CTRL ('\\')); tbuf.t_startc = CHK (tbuf.t_startc, CTRL ('Q')); tbuf.t_stopc = CHK (tbuf.t_stopc, CTRL ('S')); tbuf.t_eofc = CHK (tbuf.t_eofc, CTRL ('D')); /* brkc is left alone. */ ioctl (FILEDES, TIOCSETC, &tbuf); #endif /* TIOCGETC */ mode.sg_flags &= ~(RAW #ifdef CBREAK | CBREAK #endif /* CBREAK */ | VTDELAY | ALLDELAY); mode.sg_flags |= XTABS | ECHO | CRMOD | ANYP; return; } #endif void tui_show_source (const char *fullname, int line) { struct symtab_and_line cursal = get_current_source_symtab_and_line (); /* Make sure that the source window is displayed. */ tui_add_win_to_layout (SRC_WIN); tui_update_source_windows_with_line (cursal.symtab, line); tui_update_locator_fullname (fullname); } void tui_show_assembly (struct gdbarch *gdbarch, CORE_ADDR addr) { tui_add_win_to_layout (DISASSEM_WIN); tui_update_source_windows_with_addr (gdbarch, addr); } int tui_is_window_visible (enum tui_win_type type) { if (tui_active == 0) return 0; if (tui_win_list[type] == 0) return 0; return tui_win_list[type]->generic.is_visible; } int tui_get_command_dimension (unsigned int *width, unsigned int *height) { if (!tui_active || (TUI_CMD_WIN == NULL)) { return 0; } *width = TUI_CMD_WIN->generic.width; *height = TUI_CMD_WIN->generic.height; return 1; } /* Provide a prototype to silence -Wmissing-prototypes. */ extern initialize_file_ftype _initialize_tui; void _initialize_tui (void) { struct cmd_list_element **tuicmd; tuicmd = tui_get_cmd_list (); add_cmd ("enable", class_tui, tui_enable_command, _("Enable TUI display mode."), tuicmd); add_cmd ("disable", class_tui, tui_disable_command, _("Disable TUI display mode."), tuicmd); }