X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fevent-top.h;h=f858626dd5313deebca30f1e56e065e0dd6ca1c4;hb=b50ef514ff0c8d5506227c412c508f9f538bcf5a;hp=b719549bd71ad83d7c25361f63b7eb905b4cda13;hpb=72290732e94ff7ab2dcd66e6bc8f1c1c7aa92fd8;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/event-top.h b/gdb/event-top.h index b719549bd7..f858626dd5 100644 --- a/gdb/event-top.h +++ b/gdb/event-top.h @@ -1,12 +1,14 @@ -/* Definitions used by GDB event-top.c. - Copyright 1999, 2001 Free Software Foundation, Inc. +/* Definitions used by event-top.c, for GDB, the GNU debugger. + + Copyright (C) 1999-2020 Free Software Foundation, Inc. + Written by Elena Zannoni of Cygnus Solutions. 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 2 of the License, or + 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, @@ -15,93 +17,63 @@ 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, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* Stack for prompts. Each prompt is composed as a prefix, a prompt - and a suffix. The prompt to be displayed at any given time is the - one on top of the stack. A stack is necessary because of cases in - which the execution of a gdb command requires further input from - the user, like for instance 'commands' for breakpoints and - 'actions' for tracepoints. In these cases, the prompt is '>' and - gdb should process input using the asynchronous readline interface - and the event loop. In order to achieve this, we need to save - somewhere the state of GDB, i.e. that it is processing user input - as part of a command and not as part of the top level command loop. - The prompt stack represents part of the saved state. Another part - would be the function that readline would invoke after a whole line - of input has ben entered. This second piece would be something - like, for instance, where to return within the code for the actions - commands after a line has been read. This latter portion has not - beeen implemented yet. The need for a 3-part prompt arises from - the annotation level. When this is set to 2, the prompt is actually - composed of a prefix, the prompt itself and a suffix. */ - -/* At any particular time there will be always at least one prompt on - the stack, the one being currently displayed by gdb. If gdb is - using annotation level equal 2, there will be 2 prompts on the - stack: the usual one, w/o prefix and suffix (at top - 1), and the - 'composite' one with prefix and suffix added (at top). At this - time, this is the only use of the prompt stack. Resetting annotate - to 0 or 1, pops the top of the stack, resetting its size to one - element. The MAXPROMPTS limit is safe, for now. Once other cases - are dealt with (like the different prompts used for 'commands' or - 'actions') this array implementation of the prompt stack may have - to change. */ - -#define MAXPROMPTS 10 -struct prompts - { - struct - { - char *prefix; - char *prompt; - char *suffix; - } - prompt_stack[MAXPROMPTS]; - int top; - }; - -#define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt -#define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix -#define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix - -/* Exported functions from event-top.c. - FIXME: these should really go into top.h. */ - -extern void display_gdb_prompt (char *new_prompt); -extern void async_init_signals (void); -extern void set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c); -extern void set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c); -extern void set_async_prompt (char *args, int from_tty, struct cmd_list_element *c); + along with this program. If not, see . */ + +#ifndef EVENT_TOP_H +#define EVENT_TOP_H -/* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ -#ifndef STOP_SIGNAL #include + +struct cmd_list_element; + +/* Exported functions from event-top.c. + FIXME: these should really go into top.h. */ + +extern void display_gdb_prompt (const char *new_prompt); +extern void gdb_setup_readline (int); +extern void gdb_disable_readline (void); +extern void async_init_signals (void); +extern void change_line_handler (int); + +extern void command_line_handler (gdb::unique_xmalloc_ptr &&rl); +extern void command_handler (const char *command); + #ifdef SIGTSTP -#define STOP_SIGNAL SIGTSTP -extern void handle_stop_sig (int sig); -#endif +extern void handle_sigtstp (int sig); #endif + extern void handle_sigint (int sig); -extern void pop_prompt (void); -extern void push_prompt (char *prefix, char *prompt, char *suffix); -extern void gdb_readline2 (void *client_data); -extern void mark_async_signal_handler_wrapper (void *token); +extern void handle_sigterm (int sig); extern void async_request_quit (void *arg); extern void stdin_event_handler (int error, void *client_data); extern void async_disable_stdin (void); -extern void async_enable_stdin (void *dummy); +extern void async_enable_stdin (void); /* Exported variables from event-top.c. - FIXME: these should really go into top.h. */ + FIXME: these should really go into top.h. */ -extern int async_command_editing_p; -extern int exec_done_display_p; -extern char *async_annotation_suffix; -extern char *new_async_prompt; +extern bool set_editing_cmd_var; +extern bool exec_done_display_p; extern struct prompts the_prompts; -extern void (*call_readline) (void *); -extern void (*input_handler) (char *); -extern int input_fd; +extern void (*after_char_processing_hook) (void); +extern int call_stdin_event_handler_again_p; +extern void gdb_readline_no_editing_callback (void *client_data); + +/* Wrappers for rl_callback_handler_remove and + rl_callback_handler_install that keep track of whether the callback + handler is installed in readline. Do not call the readline + versions directly. */ +extern void gdb_rl_callback_handler_remove (void); +extern void gdb_rl_callback_handler_install (const char *prompt); + +/* Reinstall the readline callback handler (with no prompt), if not + currently installed. */ +extern void gdb_rl_callback_handler_reinstall (void); + +/* The SIGSEGV handler for this thread, or NULL if there is none. GDB + always installs a global SIGSEGV handler, and then lets threads + indicate their interest in handling the signal by setting this + thread-local variable. */ +extern thread_local void (*thread_local_segv_handler) (int); + +#endif