298 lines
9.5 KiB
C++
298 lines
9.5 KiB
C++
/* Top level stuff for GDB, the GNU debugger.
|
|
|
|
Copyright (C) 1986-2020 Free Software Foundation, Inc.
|
|
|
|
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 <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef TOP_H
|
|
#define TOP_H
|
|
|
|
#include "gdbsupport/buffer.h"
|
|
#include "gdbsupport/event-loop.h"
|
|
#include "value.h"
|
|
|
|
struct tl_interp_info;
|
|
|
|
/* Prompt state. */
|
|
|
|
enum prompt_state
|
|
{
|
|
/* The command line is blocked simulating synchronous execution.
|
|
This is used to implement the foreground execution commands
|
|
('run', 'continue', etc.). We won't display the prompt and
|
|
accept further commands until the execution is actually over. */
|
|
PROMPT_BLOCKED,
|
|
|
|
/* The command finished; display the prompt before returning back to
|
|
the top level. */
|
|
PROMPT_NEEDED,
|
|
|
|
/* We've displayed the prompt already, ready for input. */
|
|
PROMPTED,
|
|
};
|
|
|
|
/* All about a user interface instance. Each user interface has its
|
|
own I/O files/streams, readline state, its own top level
|
|
interpreter (for the main UI, this is the interpreter specified
|
|
with -i on the command line) and secondary interpreters (for
|
|
interpreter-exec ...), etc. There's always one UI associated with
|
|
stdin/stdout/stderr, but the user can create secondary UIs, for
|
|
example, to create a separate MI channel on its own stdio
|
|
streams. */
|
|
|
|
struct ui
|
|
{
|
|
/* Create a new UI. */
|
|
ui (FILE *instream, FILE *outstream, FILE *errstream);
|
|
~ui ();
|
|
|
|
DISABLE_COPY_AND_ASSIGN (ui);
|
|
|
|
/* Pointer to next in singly-linked list. */
|
|
struct ui *next;
|
|
|
|
/* Convenient handle (UI number). Unique across all UIs. */
|
|
int num;
|
|
|
|
/* The UI's command line buffer. This is to used to accumulate
|
|
input until we have a whole command line. */
|
|
struct buffer line_buffer;
|
|
|
|
/* The callback used by the event loop whenever an event is detected
|
|
on the UI's input file descriptor. This function incrementally
|
|
builds a buffer where it accumulates the line read up to the
|
|
point of invocation. In the special case in which the character
|
|
read is newline, the function invokes the INPUT_HANDLER callback
|
|
(see below). */
|
|
void (*call_readline) (gdb_client_data);
|
|
|
|
/* The function to invoke when a complete line of input is ready for
|
|
processing. */
|
|
void (*input_handler) (gdb::unique_xmalloc_ptr<char> &&);
|
|
|
|
/* True if this UI is using the readline library for command
|
|
editing; false if using GDB's own simple readline emulation, with
|
|
no editing support. */
|
|
int command_editing;
|
|
|
|
/* Each UI has its own independent set of interpreters. */
|
|
struct ui_interp_info *interp_info;
|
|
|
|
/* True if the UI is in async mode, false if in sync mode. If in
|
|
sync mode, a synchronous execution command (e.g, "next") does not
|
|
return until the command is finished. If in async mode, then
|
|
running a synchronous command returns right after resuming the
|
|
target. Waiting for the command's completion is later done on
|
|
the top event loop. For the main UI, this starts out disabled,
|
|
until all the explicit command line arguments (e.g., `gdb -ex
|
|
"start" -ex "next"') are processed. */
|
|
int async;
|
|
|
|
/* The number of nested readline secondary prompts that are
|
|
currently active. */
|
|
int secondary_prompt_depth;
|
|
|
|
/* The UI's stdin. Set to stdin for the main UI. */
|
|
FILE *stdin_stream;
|
|
|
|
/* stdio stream that command input is being read from. Set to stdin
|
|
normally. Set by source_command to the file we are sourcing.
|
|
Set to NULL if we are executing a user-defined command or
|
|
interacting via a GUI. */
|
|
FILE *instream;
|
|
/* Standard output stream. */
|
|
FILE *outstream;
|
|
/* Standard error stream. */
|
|
FILE *errstream;
|
|
|
|
/* The file descriptor for the input stream, so that we can register
|
|
it with the event loop. */
|
|
int input_fd;
|
|
|
|
/* Whether ISATTY returns true on input_fd. Cached here because
|
|
quit_force needs to know this _after_ input_fd might be
|
|
closed. */
|
|
int input_interactive_p;
|
|
|
|
/* See enum prompt_state's description. */
|
|
enum prompt_state prompt_state;
|
|
|
|
/* The fields below that start with "m_" are "private". They're
|
|
meant to be accessed through wrapper macros that make them look
|
|
like globals. */
|
|
|
|
/* The ui_file streams. */
|
|
/* Normal results */
|
|
struct ui_file *m_gdb_stdout;
|
|
/* Input stream */
|
|
struct ui_file *m_gdb_stdin;
|
|
/* Serious error notifications */
|
|
struct ui_file *m_gdb_stderr;
|
|
/* Log/debug/trace messages that should bypass normal stdout/stderr
|
|
filtering. For moment, always call this stream using
|
|
*_unfiltered. In the very near future that restriction shall be
|
|
removed - either call shall be unfiltered. (cagney 1999-06-13). */
|
|
struct ui_file *m_gdb_stdlog;
|
|
|
|
/* The current ui_out. */
|
|
struct ui_out *m_current_uiout;
|
|
};
|
|
|
|
/* The main UI. This is the UI that is bound to stdin/stdout/stderr.
|
|
It always exists and is created automatically when GDB starts
|
|
up. */
|
|
extern struct ui *main_ui;
|
|
|
|
/* The current UI. */
|
|
extern struct ui *current_ui;
|
|
|
|
/* The list of all UIs. */
|
|
extern struct ui *ui_list;
|
|
|
|
/* State for SWITCH_THRU_ALL_UIS. */
|
|
class switch_thru_all_uis
|
|
{
|
|
public:
|
|
|
|
switch_thru_all_uis () : m_iter (ui_list), m_save_ui (¤t_ui)
|
|
{
|
|
current_ui = ui_list;
|
|
}
|
|
|
|
/* If done iterating, return true; otherwise return false. */
|
|
bool done () const
|
|
{
|
|
return m_iter == NULL;
|
|
}
|
|
|
|
/* Move to the next UI, setting current_ui if iteration is not yet
|
|
complete. */
|
|
void next ()
|
|
{
|
|
m_iter = m_iter->next;
|
|
if (m_iter != NULL)
|
|
current_ui = m_iter;
|
|
}
|
|
|
|
private:
|
|
|
|
/* No need for these. They are intentionally not defined
|
|
anywhere. */
|
|
switch_thru_all_uis &operator= (const switch_thru_all_uis &);
|
|
switch_thru_all_uis (const switch_thru_all_uis &);
|
|
|
|
/* Used to iterate through the UIs. */
|
|
struct ui *m_iter;
|
|
|
|
/* Save and restore current_ui. */
|
|
scoped_restore_tmpl<struct ui *> m_save_ui;
|
|
};
|
|
|
|
/* Traverse through all UI, and switch the current UI to the one
|
|
being iterated. */
|
|
#define SWITCH_THRU_ALL_UIS() \
|
|
for (switch_thru_all_uis stau_state; !stau_state.done (); stau_state.next ())
|
|
|
|
/* Traverse over all UIs. */
|
|
#define ALL_UIS(UI) \
|
|
for (UI = ui_list; UI; UI = UI->next) \
|
|
|
|
/* Register the UI's input file descriptor in the event loop. */
|
|
extern void ui_register_input_event_handler (struct ui *ui);
|
|
|
|
/* Unregister the UI's input file descriptor from the event loop. */
|
|
extern void ui_unregister_input_event_handler (struct ui *ui);
|
|
|
|
/* From top.c. */
|
|
extern bool confirm;
|
|
extern int inhibit_gdbinit;
|
|
|
|
/* Print the GDB version banner to STREAM. If INTERACTIVE is false,
|
|
then information referring to commands (e.g., "show configuration")
|
|
is omitted; this mode is used for the --version command line
|
|
option. If INTERACTIVE is true, then interactive commands are
|
|
mentioned. */
|
|
extern void print_gdb_version (struct ui_file *stream, bool interactive);
|
|
|
|
extern void print_gdb_configuration (struct ui_file *);
|
|
|
|
extern void read_command_file (FILE *);
|
|
extern void init_history (void);
|
|
extern void command_loop (void);
|
|
extern int quit_confirm (void);
|
|
extern void quit_force (int *, int);
|
|
extern void quit_command (const char *, int);
|
|
extern void quit_cover (void);
|
|
extern void execute_command (const char *, int);
|
|
|
|
/* If the interpreter is in sync mode (we're running a user command's
|
|
list, running command hooks or similars), and we just ran a
|
|
synchronous command that started the target, wait for that command
|
|
to end. WAS_SYNC indicates whether sync_execution was set before
|
|
the command was run. */
|
|
|
|
extern void maybe_wait_sync_command_done (int was_sync);
|
|
|
|
/* Wait for a synchronous execution command to end. */
|
|
extern void wait_sync_command_done (void);
|
|
|
|
extern void check_frame_language_change (void);
|
|
|
|
/* Prepare for execution of a command.
|
|
Call this before every command, CLI or MI.
|
|
Returns a cleanup to be run after the command is completed. */
|
|
extern scoped_value_mark prepare_execute_command (void);
|
|
|
|
/* This function returns a pointer to the string that is used
|
|
by gdb for its command prompt. */
|
|
extern char *get_prompt (void);
|
|
|
|
/* This function returns a pointer to the string that is used
|
|
by gdb for its command prompt. */
|
|
extern void set_prompt (const char *s);
|
|
|
|
/* Return 1 if UI's current input handler is a secondary prompt, 0
|
|
otherwise. */
|
|
|
|
extern int gdb_in_secondary_prompt_p (struct ui *ui);
|
|
|
|
/* From random places. */
|
|
extern int readnow_symbol_files;
|
|
extern int readnever_symbol_files;
|
|
|
|
/* Perform _initialize initialization. */
|
|
extern void gdb_init (char *);
|
|
|
|
/* For use by event-top.c. */
|
|
/* Variables from top.c. */
|
|
extern int source_line_number;
|
|
extern std::string source_file_name;
|
|
extern bool history_expansion_p;
|
|
extern bool server_command;
|
|
extern char *lim_at_start;
|
|
|
|
extern void gdb_add_history (const char *);
|
|
|
|
extern void show_commands (const char *args, int from_tty);
|
|
|
|
extern void set_verbose (const char *, int, struct cmd_list_element *);
|
|
|
|
extern char *handle_line_of_input (struct buffer *cmd_line_buffer,
|
|
const char *rl, int repeat,
|
|
const char *annotation_suffix);
|
|
|
|
#endif
|