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The STOP_SIGNAL macro was originally added for Convex Unix (https://en.wikipedia.org/wiki/Convex_Computer). In: git show 7a67dd45ca1c:gdb/m-convex.h we see: ~~~ /* Use SIGCONT rather than SIGTSTP because convex Unix occasionally turkeys SIGTSTP. I think. */ #define STOP_SIGNAL SIGCONT ~~~ That's gdb-3.5, 1990... In gdb/ChangeLog-3.x we see: ~~~ Tue Apr 18 13:43:37 1989 Randall Smith (randy at apple-gunkies.ai.mit.edu) Various changes involved in 1) getting gdb to work on the convex, [...] Made whatever signal indicates a stop configurable (via macro STOP_SIGNAL). (main): Setup use of above as a signal handler. Added check for "-nw" in args already processed. (command_line_input): SIGTSTP ==>STOP_SIGNAL. ~~~ Support for Convex Unix is long gone, and nothing else overrides STOP_SIGNAL. So just use SIGTSTP directly, removing a little obfuscation. (I don't really understand why we override [1] readline's SIGTSTP handler (only) when reading scripts (and then fail to restore it properly, assuming SIG_DFL...), but I'll leave that for another pass. [1] - Actually, starting with readline 6.3, readline is no longer installing its handlers while GDB is in control...) gdb/ChangeLog: 2017-11-06 Pedro Alves <palves@redhat.com> * event-top.c: Check SIGTSTP instead of STOP_SIGNAL thoughout. (async_init_signals): Adjust. (handle_stop_sig): Rename to ... (handle_sigtstp): ... this. (async_stop_sig): Rename to ... (async_sigtstp_handler): ... this, and delete STOP_SIGNAL != SIGTSTP path. * event-top.h: Move signal.h include to the top. Check SIGTSTP instead of STOP_SIGNAL thoughout. (handle_stop_sig): Rename to ... (handle_sigtstp): ... this. * top.c (command_line_input): Replace STOP_SIGNAL -> SIGTSTP.
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* Definitions used by event-top.c, for GDB, the GNU debugger.
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Copyright (C) 1999-2017 Free Software Foundation, Inc.
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Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef EVENT_TOP_H
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#define EVENT_TOP_H
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#include <signal.h>
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struct cmd_list_element;
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/* Exported functions from event-top.c.
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FIXME: these should really go into top.h. */
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extern void display_gdb_prompt (const char *new_prompt);
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extern void gdb_setup_readline (int);
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extern void gdb_disable_readline (void);
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extern void async_init_signals (void);
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extern void change_line_handler (int);
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extern void command_line_handler (char *rl);
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extern void command_handler (char *command);
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#ifdef SIGTSTP
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extern void handle_sigtstp (int sig);
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#endif
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extern void handle_sigint (int sig);
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extern void handle_sigterm (int sig);
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extern void async_request_quit (void *arg);
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extern void stdin_event_handler (int error, void *client_data);
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extern void async_disable_stdin (void);
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extern void async_enable_stdin (void);
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/* Exported variables from event-top.c.
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FIXME: these should really go into top.h. */
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extern int set_editing_cmd_var;
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extern int exec_done_display_p;
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extern struct prompts the_prompts;
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extern void (*after_char_processing_hook) (void);
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extern int call_stdin_event_handler_again_p;
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extern void gdb_readline_no_editing_callback (void *client_data);
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/* Wrappers for rl_callback_handler_remove and
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rl_callback_handler_install that keep track of whether the callback
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handler is installed in readline. Do not call the readline
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versions directly. */
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extern void gdb_rl_callback_handler_remove (void);
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extern void gdb_rl_callback_handler_install (const char *prompt);
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/* Reinstall the readline callback handler (with no prompt), if not
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currently installed. */
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extern void gdb_rl_callback_handler_reinstall (void);
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#endif
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