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270135645b
The async_init_signals has, for some time, dealt with async and sync signals, so removing the async prefix makes sense I think. Additionally, as pointed out by Pedro: ..... The comments relating to SIGTRAP and SIGQUIT within this function are out of date. The comments for SIGTRAP talk about the signal disposition (SIG_IGN) being passed to the inferior, meaning the signal disposition being inherited by GDB's fork children. However, we now call restore_original_signals_state prior to forking, so the comment on SIGTRAP is redundant. The comments for SIGQUIT are similarly out of date, further, the comment on SIGQUIT talks about problems with BSD4.3 and vfork, however, we have not supported BSD4.3 for several years now. Given the above, it seems that changing the disposition of SIGTRAP is no longer needed, so I've deleted the signal() call for SIGTRAP. Finally, the header comment on the function now called gdb_init_signals was getting quite out of date, so I've updated it to (hopefully) better reflect reality. There should be no user visible change after this commit.
89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/* Definitions used by event-top.c, for GDB, the GNU debugger.
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Copyright (C) 1999-2021 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 gdb_init_signals (void);
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extern void change_line_handler (int);
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extern void command_line_handler (gdb::unique_xmalloc_ptr<char> &&rl);
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extern void command_handler (const 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 bool set_editing_cmd_var;
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extern bool 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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typedef void (*segv_handler_t) (int);
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/* On construction, replaces the current thread's SIGSEGV handler with
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the provided one. On destruction, restores the handler to the
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original one. */
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class scoped_segv_handler_restore
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{
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public:
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scoped_segv_handler_restore (segv_handler_t new_handler);
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~scoped_segv_handler_restore ();
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private:
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segv_handler_t m_old_handler;
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};
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#endif
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