mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
32d0add0a6
gdb/ChangeLog: Update year range in copyright notice of all files.
502 lines
14 KiB
C
502 lines
14 KiB
C
/* Manages interpreters for GDB, the GNU debugger.
|
|
|
|
Copyright (C) 2000-2015 Free Software Foundation, Inc.
|
|
|
|
Written by Jim Ingham <jingham@apple.com> of Apple Computer, 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/>. */
|
|
|
|
/* This is just a first cut at separating out the "interpreter"
|
|
functions of gdb into self-contained modules. There are a couple
|
|
of open areas that need to be sorted out:
|
|
|
|
1) The interpreter explicitly contains a UI_OUT, and can insert itself
|
|
into the event loop, but it doesn't explicitly contain hooks for readline.
|
|
I did this because it seems to me many interpreters won't want to use
|
|
the readline command interface, and it is probably simpler to just let
|
|
them take over the input in their resume proc. */
|
|
|
|
#include "defs.h"
|
|
#include "gdbcmd.h"
|
|
#include "ui-out.h"
|
|
#include "event-loop.h"
|
|
#include "event-top.h"
|
|
#include "interps.h"
|
|
#include "completer.h"
|
|
#include "top.h" /* For command_loop. */
|
|
#include "continuations.h"
|
|
|
|
/* True if the current interpreter in is async mode. See interps.h
|
|
for more details. This starts out disabled, until all the explicit
|
|
command line arguments (e.g., `gdb -ex "start" -ex "next"') are
|
|
processed. */
|
|
int interpreter_async = 0;
|
|
|
|
struct interp
|
|
{
|
|
/* This is the name in "-i=" and set interpreter. */
|
|
const char *name;
|
|
|
|
/* Interpreters are stored in a linked list, this is the next
|
|
one... */
|
|
struct interp *next;
|
|
|
|
/* This is a cookie that an instance of the interpreter can use.
|
|
This is a bit confused right now as the exact initialization
|
|
sequence for it, and how it relates to the interpreter's uiout
|
|
object is a bit confused. */
|
|
void *data;
|
|
|
|
/* Has the init_proc been run? */
|
|
int inited;
|
|
|
|
const struct interp_procs *procs;
|
|
int quiet_p;
|
|
};
|
|
|
|
/* The magic initialization routine for this module. */
|
|
|
|
void _initialize_interpreter (void);
|
|
|
|
/* Variables local to this file: */
|
|
|
|
static struct interp *interp_list = NULL;
|
|
static struct interp *current_interpreter = NULL;
|
|
static struct interp *top_level_interpreter_ptr = NULL;
|
|
|
|
/* interp_new - This allocates space for a new interpreter,
|
|
fills the fields from the inputs, and returns a pointer to the
|
|
interpreter. */
|
|
struct interp *
|
|
interp_new (const char *name, const struct interp_procs *procs)
|
|
{
|
|
struct interp *new_interp;
|
|
|
|
new_interp = XNEW (struct interp);
|
|
|
|
new_interp->name = xstrdup (name);
|
|
new_interp->data = NULL;
|
|
new_interp->quiet_p = 0;
|
|
new_interp->procs = procs;
|
|
new_interp->inited = 0;
|
|
|
|
/* Check for required procs. */
|
|
gdb_assert (procs->command_loop_proc != NULL);
|
|
|
|
return new_interp;
|
|
}
|
|
|
|
/* Add interpreter INTERP to the gdb interpreter list. The
|
|
interpreter must not have previously been added. */
|
|
void
|
|
interp_add (struct interp *interp)
|
|
{
|
|
gdb_assert (interp_lookup (interp->name) == NULL);
|
|
|
|
interp->next = interp_list;
|
|
interp_list = interp;
|
|
}
|
|
|
|
/* This sets the current interpreter to be INTERP. If INTERP has not
|
|
been initialized, then this will also run the init proc. If the
|
|
init proc is successful, return 1, if it fails, set the old
|
|
interpreter back in place and return 0. If we can't restore the
|
|
old interpreter, then raise an internal error, since we are in
|
|
pretty bad shape at this point.
|
|
|
|
The TOP_LEVEL parameter tells if this new interpreter is
|
|
the top-level one. The top-level is what is requested
|
|
on the command line, and is responsible for reporting general
|
|
notification about target state changes. For example, if
|
|
MI is the top-level interpreter, then it will always report
|
|
events such as target stops and new thread creation, even if they
|
|
are caused by CLI commands. */
|
|
int
|
|
interp_set (struct interp *interp, int top_level)
|
|
{
|
|
struct interp *old_interp = current_interpreter;
|
|
int first_time = 0;
|
|
char buffer[64];
|
|
|
|
/* If we already have an interpreter, then trying to
|
|
set top level interpreter is kinda pointless. */
|
|
gdb_assert (!top_level || !current_interpreter);
|
|
gdb_assert (!top_level || !top_level_interpreter_ptr);
|
|
|
|
if (current_interpreter != NULL)
|
|
{
|
|
ui_out_flush (current_uiout);
|
|
if (current_interpreter->procs->suspend_proc
|
|
&& !current_interpreter->procs->suspend_proc (current_interpreter->
|
|
data))
|
|
{
|
|
error (_("Could not suspend interpreter \"%s\"."),
|
|
current_interpreter->name);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
first_time = 1;
|
|
}
|
|
|
|
current_interpreter = interp;
|
|
if (top_level)
|
|
top_level_interpreter_ptr = interp;
|
|
|
|
/* We use interpreter_p for the "set interpreter" variable, so we need
|
|
to make sure we have a malloc'ed copy for the set command to free. */
|
|
if (interpreter_p != NULL
|
|
&& strcmp (current_interpreter->name, interpreter_p) != 0)
|
|
{
|
|
xfree (interpreter_p);
|
|
|
|
interpreter_p = xstrdup (current_interpreter->name);
|
|
}
|
|
|
|
/* Run the init proc. If it fails, try to restore the old interp. */
|
|
|
|
if (!interp->inited)
|
|
{
|
|
if (interp->procs->init_proc != NULL)
|
|
{
|
|
interp->data = interp->procs->init_proc (interp, top_level);
|
|
}
|
|
interp->inited = 1;
|
|
}
|
|
|
|
/* Do this only after the interpreter is initialized. */
|
|
current_uiout = interp->procs->ui_out_proc (interp);
|
|
|
|
/* Clear out any installed interpreter hooks/event handlers. */
|
|
clear_interpreter_hooks ();
|
|
|
|
if (interp->procs->resume_proc != NULL
|
|
&& (!interp->procs->resume_proc (interp->data)))
|
|
{
|
|
if (old_interp == NULL || !interp_set (old_interp, 0))
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Failed to initialize new interp \"%s\" %s"),
|
|
interp->name, "and could not restore old interp!\n");
|
|
return 0;
|
|
}
|
|
|
|
if (!first_time && !interp_quiet_p (interp))
|
|
{
|
|
xsnprintf (buffer, sizeof (buffer),
|
|
"Switching to interpreter \"%.24s\".\n", interp->name);
|
|
ui_out_text (current_uiout, buffer);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* interp_lookup - Looks up the interpreter for NAME. If no such
|
|
interpreter exists, return NULL, otherwise return a pointer to the
|
|
interpreter. */
|
|
struct interp *
|
|
interp_lookup (const char *name)
|
|
{
|
|
struct interp *interp;
|
|
|
|
if (name == NULL || strlen (name) == 0)
|
|
return NULL;
|
|
|
|
for (interp = interp_list; interp != NULL; interp = interp->next)
|
|
{
|
|
if (strcmp (interp->name, name) == 0)
|
|
return interp;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Returns the current interpreter. */
|
|
|
|
struct ui_out *
|
|
interp_ui_out (struct interp *interp)
|
|
{
|
|
if (interp != NULL)
|
|
return interp->procs->ui_out_proc (interp);
|
|
|
|
return current_interpreter->procs->ui_out_proc (current_interpreter);
|
|
}
|
|
|
|
int
|
|
current_interp_set_logging (int start_log, struct ui_file *out,
|
|
struct ui_file *logfile)
|
|
{
|
|
if (current_interpreter == NULL
|
|
|| current_interpreter->procs->set_logging_proc == NULL)
|
|
return 0;
|
|
|
|
return current_interpreter->procs->set_logging_proc (current_interpreter,
|
|
start_log, out,
|
|
logfile);
|
|
}
|
|
|
|
/* Temporarily overrides the current interpreter. */
|
|
struct interp *
|
|
interp_set_temp (const char *name)
|
|
{
|
|
struct interp *interp = interp_lookup (name);
|
|
struct interp *old_interp = current_interpreter;
|
|
|
|
if (interp)
|
|
current_interpreter = interp;
|
|
return old_interp;
|
|
}
|
|
|
|
/* Returns the interpreter's cookie. */
|
|
|
|
void *
|
|
interp_data (struct interp *interp)
|
|
{
|
|
return interp->data;
|
|
}
|
|
|
|
/* Returns the interpreter's name. */
|
|
|
|
const char *
|
|
interp_name (struct interp *interp)
|
|
{
|
|
return interp->name;
|
|
}
|
|
|
|
/* Returns true if the current interp is the passed in name. */
|
|
int
|
|
current_interp_named_p (const char *interp_name)
|
|
{
|
|
if (current_interpreter)
|
|
return (strcmp (current_interpreter->name, interp_name) == 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* The interpreter that is active while `interp_exec' is active, NULL
|
|
at all other times. */
|
|
static struct interp *command_interpreter;
|
|
|
|
/* The interpreter that was active when a command was executed.
|
|
Normally that'd always be CURRENT_INTERPRETER, except that MI's
|
|
-interpreter-exec command doesn't actually flip the current
|
|
interpreter when running its sub-command. The
|
|
`command_interpreter' global tracks when interp_exec is called
|
|
(IOW, when -interpreter-exec is called). If that is set, it is
|
|
INTERP in '-interpreter-exec INTERP "CMD"' or in 'interpreter-exec
|
|
INTERP "CMD". Otherwise, interp_exec isn't active, and so the
|
|
interpreter running the command is the current interpreter. */
|
|
|
|
struct interp *
|
|
command_interp (void)
|
|
{
|
|
if (command_interpreter != NULL)
|
|
return command_interpreter;
|
|
else
|
|
return current_interpreter;
|
|
}
|
|
|
|
/* Run the current command interpreter's main loop. */
|
|
void
|
|
current_interp_command_loop (void)
|
|
{
|
|
gdb_assert (current_interpreter != NULL);
|
|
|
|
current_interpreter->procs->command_loop_proc (current_interpreter->data);
|
|
}
|
|
|
|
int
|
|
interp_quiet_p (struct interp *interp)
|
|
{
|
|
if (interp != NULL)
|
|
return interp->quiet_p;
|
|
else
|
|
return current_interpreter->quiet_p;
|
|
}
|
|
|
|
static int
|
|
interp_set_quiet (struct interp *interp, int quiet)
|
|
{
|
|
int old_val = interp->quiet_p;
|
|
|
|
interp->quiet_p = quiet;
|
|
return old_val;
|
|
}
|
|
|
|
/* interp_exec - This executes COMMAND_STR in the current
|
|
interpreter. */
|
|
|
|
struct gdb_exception
|
|
interp_exec (struct interp *interp, const char *command_str)
|
|
{
|
|
struct gdb_exception ex;
|
|
struct interp *save_command_interp;
|
|
|
|
gdb_assert (interp->procs->exec_proc != NULL);
|
|
|
|
/* See `command_interp' for why we do this. */
|
|
save_command_interp = command_interpreter;
|
|
command_interpreter = interp;
|
|
|
|
ex = interp->procs->exec_proc (interp->data, command_str);
|
|
|
|
command_interpreter = save_command_interp;
|
|
|
|
return ex;
|
|
}
|
|
|
|
/* A convenience routine that nulls out all the common command hooks.
|
|
Use it when removing your interpreter in its suspend proc. */
|
|
void
|
|
clear_interpreter_hooks (void)
|
|
{
|
|
deprecated_init_ui_hook = 0;
|
|
deprecated_print_frame_info_listing_hook = 0;
|
|
/*print_frame_more_info_hook = 0; */
|
|
deprecated_query_hook = 0;
|
|
deprecated_warning_hook = 0;
|
|
deprecated_interactive_hook = 0;
|
|
deprecated_readline_begin_hook = 0;
|
|
deprecated_readline_hook = 0;
|
|
deprecated_readline_end_hook = 0;
|
|
deprecated_register_changed_hook = 0;
|
|
deprecated_context_hook = 0;
|
|
deprecated_target_wait_hook = 0;
|
|
deprecated_call_command_hook = 0;
|
|
deprecated_error_begin_hook = 0;
|
|
}
|
|
|
|
static void
|
|
interpreter_exec_cmd (char *args, int from_tty)
|
|
{
|
|
struct interp *old_interp, *interp_to_use;
|
|
char **prules = NULL;
|
|
char **trule = NULL;
|
|
unsigned int nrules;
|
|
unsigned int i;
|
|
int old_quiet, use_quiet;
|
|
struct cleanup *cleanup;
|
|
|
|
if (args == NULL)
|
|
error_no_arg (_("interpreter-exec command"));
|
|
|
|
prules = gdb_buildargv (args);
|
|
cleanup = make_cleanup_freeargv (prules);
|
|
|
|
nrules = 0;
|
|
for (trule = prules; *trule != NULL; trule++)
|
|
nrules++;
|
|
|
|
if (nrules < 2)
|
|
error (_("usage: interpreter-exec <interpreter> [ <command> ... ]"));
|
|
|
|
old_interp = current_interpreter;
|
|
|
|
interp_to_use = interp_lookup (prules[0]);
|
|
if (interp_to_use == NULL)
|
|
error (_("Could not find interpreter \"%s\"."), prules[0]);
|
|
|
|
/* Temporarily set interpreters quiet. */
|
|
old_quiet = interp_set_quiet (old_interp, 1);
|
|
use_quiet = interp_set_quiet (interp_to_use, 1);
|
|
|
|
if (!interp_set (interp_to_use, 0))
|
|
error (_("Could not switch to interpreter \"%s\"."), prules[0]);
|
|
|
|
for (i = 1; i < nrules; i++)
|
|
{
|
|
struct gdb_exception e = interp_exec (interp_to_use, prules[i]);
|
|
|
|
if (e.reason < 0)
|
|
{
|
|
interp_set (old_interp, 0);
|
|
interp_set_quiet (interp_to_use, use_quiet);
|
|
interp_set_quiet (old_interp, old_quiet);
|
|
error (_("error in command: \"%s\"."), prules[i]);
|
|
}
|
|
}
|
|
|
|
interp_set (old_interp, 0);
|
|
interp_set_quiet (interp_to_use, use_quiet);
|
|
interp_set_quiet (old_interp, old_quiet);
|
|
|
|
do_cleanups (cleanup);
|
|
}
|
|
|
|
/* List the possible interpreters which could complete the given text. */
|
|
static VEC (char_ptr) *
|
|
interpreter_completer (struct cmd_list_element *ignore,
|
|
const char *text, const char *word)
|
|
{
|
|
int textlen;
|
|
VEC (char_ptr) *matches = NULL;
|
|
struct interp *interp;
|
|
|
|
textlen = strlen (text);
|
|
for (interp = interp_list; interp != NULL; interp = interp->next)
|
|
{
|
|
if (strncmp (interp->name, text, textlen) == 0)
|
|
{
|
|
char *match;
|
|
|
|
match = (char *) xmalloc (strlen (word) + strlen (interp->name) + 1);
|
|
if (word == text)
|
|
strcpy (match, interp->name);
|
|
else if (word > text)
|
|
{
|
|
/* Return some portion of interp->name. */
|
|
strcpy (match, interp->name + (word - text));
|
|
}
|
|
else
|
|
{
|
|
/* Return some of text plus interp->name. */
|
|
strncpy (match, word, text - word);
|
|
match[text - word] = '\0';
|
|
strcat (match, interp->name);
|
|
}
|
|
VEC_safe_push (char_ptr, matches, match);
|
|
}
|
|
}
|
|
|
|
return matches;
|
|
}
|
|
|
|
struct interp *
|
|
top_level_interpreter (void)
|
|
{
|
|
return top_level_interpreter_ptr;
|
|
}
|
|
|
|
void *
|
|
top_level_interpreter_data (void)
|
|
{
|
|
gdb_assert (top_level_interpreter_ptr);
|
|
return top_level_interpreter_ptr->data;
|
|
}
|
|
|
|
/* This just adds the "interpreter-exec" command. */
|
|
void
|
|
_initialize_interpreter (void)
|
|
{
|
|
struct cmd_list_element *c;
|
|
|
|
c = add_cmd ("interpreter-exec", class_support,
|
|
interpreter_exec_cmd, _("\
|
|
Execute a command in an interpreter. It takes two arguments:\n\
|
|
The first argument is the name of the interpreter to use.\n\
|
|
The second argument is the command to execute.\n"), &cmdlist);
|
|
set_cmd_completer (c, interpreter_completer);
|
|
}
|