3488 lines
99 KiB
C
3488 lines
99 KiB
C
/* Memory-access and commands for "inferior" process, for GDB.
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Copyright (C) 1986-2020 Free Software Foundation, Inc.
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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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#include "defs.h"
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#include "arch-utils.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "frame.h"
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#include "inferior.h"
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#include "infrun.h"
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#include "gdbsupport/environ.h"
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#include "value.h"
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#include "gdbcmd.h"
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#include "symfile.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "language.h"
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#include "objfiles.h"
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#include "completer.h"
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#include "ui-out.h"
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#include "regcache.h"
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#include "reggroups.h"
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#include "block.h"
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#include "solib.h"
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#include <ctype.h>
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#include "observable.h"
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#include "target-descriptions.h"
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#include "user-regs.h"
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#include "gdbthread.h"
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#include "valprint.h"
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#include "inline-frame.h"
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#include "tracepoint.h"
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#include "inf-loop.h"
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#include "continuations.h"
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#include "linespec.h"
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#include "thread-fsm.h"
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#include "top.h"
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#include "interps.h"
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#include "skip.h"
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#include "gdbsupport/gdb_optional.h"
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#include "source.h"
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#include "cli/cli-style.h"
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/* Local functions: */
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static void until_next_command (int);
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static void step_1 (int, int, const char *);
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#define ERROR_NO_INFERIOR \
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if (!target_has_execution) error (_("The program is not being run."));
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/* Scratch area where string containing arguments to give to the
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program will be stored by 'set args'. As soon as anything is
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stored, notice_args_set will move it into per-inferior storage.
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Arguments are separated by spaces. Empty string (pointer to '\0')
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means no args. */
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static char *inferior_args_scratch;
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/* Scratch area where the new cwd will be stored by 'set cwd'. */
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static char *inferior_cwd_scratch;
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/* Scratch area where 'set inferior-tty' will store user-provided value.
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We'll immediate copy it into per-inferior storage. */
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static char *inferior_io_terminal_scratch;
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/* Pid of our debugged inferior, or 0 if no inferior now.
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Since various parts of infrun.c test this to see whether there is a program
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being debugged it should be nonzero (currently 3 is used) for remote
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debugging. */
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ptid_t inferior_ptid;
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/* Nonzero if stopped due to completion of a stack dummy routine. */
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enum stop_stack_kind stop_stack_dummy;
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/* Nonzero if stopped due to a random (unexpected) signal in inferior
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process. */
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int stopped_by_random_signal;
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/* Accessor routines. */
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/* Set the io terminal for the current inferior. Ownership of
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TERMINAL_NAME is not transferred. */
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void
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set_inferior_io_terminal (const char *terminal_name)
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{
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xfree (current_inferior ()->terminal);
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if (terminal_name != NULL && *terminal_name != '\0')
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current_inferior ()->terminal = xstrdup (terminal_name);
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else
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current_inferior ()->terminal = NULL;
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}
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const char *
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get_inferior_io_terminal (void)
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{
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return current_inferior ()->terminal;
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}
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static void
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set_inferior_tty_command (const char *args, int from_tty,
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struct cmd_list_element *c)
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{
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/* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
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Now route it to current inferior. */
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set_inferior_io_terminal (inferior_io_terminal_scratch);
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}
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static void
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show_inferior_tty_command (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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/* Note that we ignore the passed-in value in favor of computing it
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directly. */
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const char *inferior_io_terminal = get_inferior_io_terminal ();
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if (inferior_io_terminal == NULL)
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inferior_io_terminal = "";
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fprintf_filtered (gdb_stdout,
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_("Terminal for future runs of program being debugged "
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"is \"%s\".\n"), inferior_io_terminal);
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}
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const char *
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get_inferior_args (void)
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{
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if (current_inferior ()->argc != 0)
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{
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char *n;
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n = construct_inferior_arguments (current_inferior ()->argc,
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current_inferior ()->argv);
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set_inferior_args (n);
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xfree (n);
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}
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if (current_inferior ()->args == NULL)
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current_inferior ()->args = xstrdup ("");
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return current_inferior ()->args;
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}
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/* Set the arguments for the current inferior. Ownership of
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NEWARGS is not transferred. */
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void
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set_inferior_args (const char *newargs)
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{
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xfree (current_inferior ()->args);
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current_inferior ()->args = newargs ? xstrdup (newargs) : NULL;
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current_inferior ()->argc = 0;
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current_inferior ()->argv = 0;
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}
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void
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set_inferior_args_vector (int argc, char **argv)
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{
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current_inferior ()->argc = argc;
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current_inferior ()->argv = argv;
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}
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/* Notice when `set args' is run. */
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static void
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set_args_command (const char *args, int from_tty, struct cmd_list_element *c)
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{
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/* CLI has assigned the user-provided value to inferior_args_scratch.
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Now route it to current inferior. */
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set_inferior_args (inferior_args_scratch);
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}
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/* Notice when `show args' is run. */
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static void
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show_args_command (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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/* Note that we ignore the passed-in value in favor of computing it
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directly. */
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deprecated_show_value_hack (file, from_tty, c, get_inferior_args ());
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}
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/* See gdbsupport/common-inferior.h. */
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void
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set_inferior_cwd (const char *cwd)
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{
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struct inferior *inf = current_inferior ();
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gdb_assert (inf != NULL);
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if (cwd == NULL)
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inf->cwd.reset ();
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else
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inf->cwd.reset (xstrdup (cwd));
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}
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/* See gdbsupport/common-inferior.h. */
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const char *
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get_inferior_cwd ()
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{
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return current_inferior ()->cwd.get ();
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}
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/* Handle the 'set cwd' command. */
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static void
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set_cwd_command (const char *args, int from_tty, struct cmd_list_element *c)
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{
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if (*inferior_cwd_scratch == '\0')
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set_inferior_cwd (NULL);
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else
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set_inferior_cwd (inferior_cwd_scratch);
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}
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/* Handle the 'show cwd' command. */
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static void
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show_cwd_command (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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const char *cwd = get_inferior_cwd ();
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if (cwd == NULL)
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fprintf_filtered (gdb_stdout,
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_("\
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You have not set the inferior's current working directory.\n\
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The inferior will inherit GDB's cwd if native debugging, or the remote\n\
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server's cwd if remote debugging.\n"));
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else
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fprintf_filtered (gdb_stdout,
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_("Current working directory that will be used "
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"when starting the inferior is \"%s\".\n"), cwd);
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}
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/* Compute command-line string given argument vector. This does the
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same shell processing as fork_inferior. */
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char *
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construct_inferior_arguments (int argc, char **argv)
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{
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char *result;
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/* ARGC should always be at least 1, but we double check this
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here. This is also needed to silence -Werror-stringop
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warnings. */
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gdb_assert (argc > 0);
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if (startup_with_shell)
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{
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#ifdef __MINGW32__
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/* This holds all the characters considered special to the
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Windows shells. */
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static const char special[] = "\"!&*|[]{}<>?`~^=;, \t\n";
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static const char quote = '"';
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#else
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/* This holds all the characters considered special to the
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typical Unix shells. We include `^' because the SunOS
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/bin/sh treats it as a synonym for `|'. */
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static const char special[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
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static const char quote = '\'';
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#endif
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int i;
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int length = 0;
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char *out, *cp;
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/* We over-compute the size. It shouldn't matter. */
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for (i = 0; i < argc; ++i)
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length += 3 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0');
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result = (char *) xmalloc (length);
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out = result;
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for (i = 0; i < argc; ++i)
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{
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if (i > 0)
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*out++ = ' ';
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/* Need to handle empty arguments specially. */
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if (argv[i][0] == '\0')
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{
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*out++ = quote;
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*out++ = quote;
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}
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else
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{
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#ifdef __MINGW32__
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int quoted = 0;
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if (strpbrk (argv[i], special))
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{
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quoted = 1;
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*out++ = quote;
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}
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#endif
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for (cp = argv[i]; *cp; ++cp)
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{
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if (*cp == '\n')
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{
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/* A newline cannot be quoted with a backslash (it
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just disappears), only by putting it inside
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quotes. */
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*out++ = quote;
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*out++ = '\n';
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*out++ = quote;
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}
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else
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{
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#ifdef __MINGW32__
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if (*cp == quote)
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#else
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if (strchr (special, *cp) != NULL)
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#endif
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*out++ = '\\';
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*out++ = *cp;
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}
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}
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#ifdef __MINGW32__
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if (quoted)
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*out++ = quote;
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#endif
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}
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}
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*out = '\0';
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}
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else
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{
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/* In this case we can't handle arguments that contain spaces,
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tabs, or newlines -- see breakup_args(). */
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int i;
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int length = 0;
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for (i = 0; i < argc; ++i)
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{
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char *cp = strchr (argv[i], ' ');
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if (cp == NULL)
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cp = strchr (argv[i], '\t');
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if (cp == NULL)
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cp = strchr (argv[i], '\n');
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if (cp != NULL)
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error (_("can't handle command-line "
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"argument containing whitespace"));
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length += strlen (argv[i]) + 1;
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}
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result = (char *) xmalloc (length);
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result[0] = '\0';
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for (i = 0; i < argc; ++i)
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{
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if (i > 0)
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strcat (result, " ");
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strcat (result, argv[i]);
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}
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}
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return result;
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}
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/* This function strips the '&' character (indicating background
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execution) that is added as *the last* of the arguments ARGS of a
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command. A copy of the incoming ARGS without the '&' is returned,
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unless the resulting string after stripping is empty, in which case
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NULL is returned. *BG_CHAR_P is an output boolean that indicates
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whether the '&' character was found. */
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static gdb::unique_xmalloc_ptr<char>
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strip_bg_char (const char *args, int *bg_char_p)
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{
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const char *p;
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if (args == NULL || *args == '\0')
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{
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*bg_char_p = 0;
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return NULL;
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}
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p = args + strlen (args);
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if (p[-1] == '&')
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{
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p--;
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while (p > args && isspace (p[-1]))
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p--;
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*bg_char_p = 1;
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if (p != args)
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return gdb::unique_xmalloc_ptr<char>
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(savestring (args, p - args));
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else
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return gdb::unique_xmalloc_ptr<char> (nullptr);
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}
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*bg_char_p = 0;
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return make_unique_xstrdup (args);
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}
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/* Common actions to take after creating any sort of inferior, by any
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means (running, attaching, connecting, et cetera). The target
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should be stopped. */
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void
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post_create_inferior (struct target_ops *target, int from_tty)
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{
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/* Be sure we own the terminal in case write operations are performed. */
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target_terminal::ours_for_output ();
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/* If the target hasn't taken care of this already, do it now.
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Targets which need to access registers during to_open,
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to_create_inferior, or to_attach should do it earlier; but many
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don't need to. */
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target_find_description ();
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/* Now that we know the register layout, retrieve current PC. But
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if the PC is unavailable (e.g., we're opening a core file with
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missing registers info), ignore it. */
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thread_info *thr = inferior_thread ();
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thr->suspend.stop_pc = 0;
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try
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{
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regcache *rc = get_thread_regcache (thr);
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thr->suspend.stop_pc = regcache_read_pc (rc);
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}
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catch (const gdb_exception_error &ex)
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||
{
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||
if (ex.error != NOT_AVAILABLE_ERROR)
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||
throw;
|
||
}
|
||
|
||
if (exec_bfd)
|
||
{
|
||
const unsigned solib_add_generation
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||
= current_program_space->solib_add_generation;
|
||
|
||
/* Create the hooks to handle shared library load and unload
|
||
events. */
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solib_create_inferior_hook (from_tty);
|
||
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if (current_program_space->solib_add_generation == solib_add_generation)
|
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{
|
||
/* The platform-specific hook should load initial shared libraries,
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||
but didn't. FROM_TTY will be incorrectly 0 but such solib
|
||
targets should be fixed anyway. Call it only after the solib
|
||
target has been initialized by solib_create_inferior_hook. */
|
||
|
||
if (info_verbose)
|
||
warning (_("platform-specific solib_create_inferior_hook did "
|
||
"not load initial shared libraries."));
|
||
|
||
/* If the solist is global across processes, there's no need to
|
||
refetch it here. */
|
||
if (!gdbarch_has_global_solist (target_gdbarch ()))
|
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solib_add (NULL, 0, auto_solib_add);
|
||
}
|
||
}
|
||
|
||
/* If the user sets watchpoints before execution having started,
|
||
then she gets software watchpoints, because GDB can't know which
|
||
target will end up being pushed, or if it supports hardware
|
||
watchpoints or not. breakpoint_re_set takes care of promoting
|
||
watchpoints to hardware watchpoints if possible, however, if this
|
||
new inferior doesn't load shared libraries or we don't pull in
|
||
symbols from any other source on this target/arch,
|
||
breakpoint_re_set is never called. Call it now so that software
|
||
watchpoints get a chance to be promoted to hardware watchpoints
|
||
if the now pushed target supports hardware watchpoints. */
|
||
breakpoint_re_set ();
|
||
|
||
gdb::observers::inferior_created.notify (target, from_tty);
|
||
}
|
||
|
||
/* Kill the inferior if already running. This function is designed
|
||
to be called when we are about to start the execution of the program
|
||
from the beginning. Ask the user to confirm that he wants to restart
|
||
the program being debugged when FROM_TTY is non-null. */
|
||
|
||
static void
|
||
kill_if_already_running (int from_tty)
|
||
{
|
||
if (inferior_ptid != null_ptid && target_has_execution)
|
||
{
|
||
/* Bail out before killing the program if we will not be able to
|
||
restart it. */
|
||
target_require_runnable ();
|
||
|
||
if (from_tty
|
||
&& !query (_("The program being debugged has been started already.\n\
|
||
Start it from the beginning? ")))
|
||
error (_("Program not restarted."));
|
||
target_kill ();
|
||
}
|
||
}
|
||
|
||
/* See inferior.h. */
|
||
|
||
void
|
||
prepare_execution_command (struct target_ops *target, int background)
|
||
{
|
||
/* If we get a request for running in the bg but the target
|
||
doesn't support it, error out. */
|
||
if (background && !target->can_async_p ())
|
||
error (_("Asynchronous execution not supported on this target."));
|
||
|
||
if (!background)
|
||
{
|
||
/* If we get a request for running in the fg, then we need to
|
||
simulate synchronous (fg) execution. Note no cleanup is
|
||
necessary for this. stdin is re-enabled whenever an error
|
||
reaches the top level. */
|
||
all_uis_on_sync_execution_starting ();
|
||
}
|
||
}
|
||
|
||
/* Determine how the new inferior will behave. */
|
||
|
||
enum run_how
|
||
{
|
||
/* Run program without any explicit stop during startup. */
|
||
RUN_NORMAL,
|
||
|
||
/* Stop at the beginning of the program's main function. */
|
||
RUN_STOP_AT_MAIN,
|
||
|
||
/* Stop at the first instruction of the program. */
|
||
RUN_STOP_AT_FIRST_INSN
|
||
};
|
||
|
||
/* Implement the "run" command. Force a stop during program start if
|
||
requested by RUN_HOW. */
|
||
|
||
static void
|
||
run_command_1 (const char *args, int from_tty, enum run_how run_how)
|
||
{
|
||
const char *exec_file;
|
||
struct ui_out *uiout = current_uiout;
|
||
struct target_ops *run_target;
|
||
int async_exec;
|
||
|
||
dont_repeat ();
|
||
|
||
kill_if_already_running (from_tty);
|
||
|
||
init_wait_for_inferior ();
|
||
clear_breakpoint_hit_counts ();
|
||
|
||
/* Clean up any leftovers from other runs. Some other things from
|
||
this function should probably be moved into target_pre_inferior. */
|
||
target_pre_inferior (from_tty);
|
||
|
||
/* The comment here used to read, "The exec file is re-read every
|
||
time we do a generic_mourn_inferior, so we just have to worry
|
||
about the symbol file." The `generic_mourn_inferior' function
|
||
gets called whenever the program exits. However, suppose the
|
||
program exits, and *then* the executable file changes? We need
|
||
to check again here. Since reopen_exec_file doesn't do anything
|
||
if the timestamp hasn't changed, I don't see the harm. */
|
||
reopen_exec_file ();
|
||
reread_symbols ();
|
||
|
||
gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
|
||
args = stripped.get ();
|
||
|
||
/* Do validation and preparation before possibly changing anything
|
||
in the inferior. */
|
||
|
||
run_target = find_run_target ();
|
||
|
||
prepare_execution_command (run_target, async_exec);
|
||
|
||
if (non_stop && !run_target->supports_non_stop ())
|
||
error (_("The target does not support running in non-stop mode."));
|
||
|
||
/* Done. Can now set breakpoints, change inferior args, etc. */
|
||
|
||
/* Insert temporary breakpoint in main function if requested. */
|
||
if (run_how == RUN_STOP_AT_MAIN)
|
||
{
|
||
std::string arg = string_printf ("-qualified %s", main_name ());
|
||
tbreak_command (arg.c_str (), 0);
|
||
}
|
||
|
||
exec_file = get_exec_file (0);
|
||
|
||
/* We keep symbols from add-symbol-file, on the grounds that the
|
||
user might want to add some symbols before running the program
|
||
(right?). But sometimes (dynamic loading where the user manually
|
||
introduces the new symbols with add-symbol-file), the code which
|
||
the symbols describe does not persist between runs. Currently
|
||
the user has to manually nuke all symbols between runs if they
|
||
want them to go away (PR 2207). This is probably reasonable. */
|
||
|
||
/* If there were other args, beside '&', process them. */
|
||
if (args != NULL)
|
||
set_inferior_args (args);
|
||
|
||
if (from_tty)
|
||
{
|
||
uiout->field_string (NULL, "Starting program");
|
||
uiout->text (": ");
|
||
if (exec_file)
|
||
uiout->field_string ("execfile", exec_file);
|
||
uiout->spaces (1);
|
||
/* We call get_inferior_args() because we might need to compute
|
||
the value now. */
|
||
uiout->field_string ("infargs", get_inferior_args ());
|
||
uiout->text ("\n");
|
||
uiout->flush ();
|
||
}
|
||
|
||
/* We call get_inferior_args() because we might need to compute
|
||
the value now. */
|
||
run_target->create_inferior (exec_file,
|
||
std::string (get_inferior_args ()),
|
||
current_inferior ()->environment.envp (),
|
||
from_tty);
|
||
/* to_create_inferior should push the target, so after this point we
|
||
shouldn't refer to run_target again. */
|
||
run_target = NULL;
|
||
|
||
/* We're starting off a new process. When we get out of here, in
|
||
non-stop mode, finish the state of all threads of that process,
|
||
but leave other threads alone, as they may be stopped in internal
|
||
events --- the frontend shouldn't see them as stopped. In
|
||
all-stop, always finish the state of all threads, as we may be
|
||
resuming more than just the new process. */
|
||
process_stratum_target *finish_target;
|
||
ptid_t finish_ptid;
|
||
if (non_stop)
|
||
{
|
||
finish_target = current_inferior ()->process_target ();
|
||
finish_ptid = ptid_t (current_inferior ()->pid);
|
||
}
|
||
else
|
||
{
|
||
finish_target = nullptr;
|
||
finish_ptid = minus_one_ptid;
|
||
}
|
||
scoped_finish_thread_state finish_state (finish_target, finish_ptid);
|
||
|
||
/* Pass zero for FROM_TTY, because at this point the "run" command
|
||
has done its thing; now we are setting up the running program. */
|
||
post_create_inferior (current_top_target (), 0);
|
||
|
||
/* Queue a pending event so that the program stops immediately. */
|
||
if (run_how == RUN_STOP_AT_FIRST_INSN)
|
||
{
|
||
thread_info *thr = inferior_thread ();
|
||
thr->suspend.waitstatus_pending_p = 1;
|
||
thr->suspend.waitstatus.kind = TARGET_WAITKIND_STOPPED;
|
||
thr->suspend.waitstatus.value.sig = GDB_SIGNAL_0;
|
||
}
|
||
|
||
/* Start the target running. Do not use -1 continuation as it would skip
|
||
breakpoint right at the entry point. */
|
||
proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0);
|
||
|
||
/* Since there was no error, there's no need to finish the thread
|
||
states here. */
|
||
finish_state.release ();
|
||
}
|
||
|
||
static void
|
||
run_command (const char *args, int from_tty)
|
||
{
|
||
run_command_1 (args, from_tty, RUN_NORMAL);
|
||
}
|
||
|
||
/* Start the execution of the program up until the beginning of the main
|
||
program. */
|
||
|
||
static void
|
||
start_command (const char *args, int from_tty)
|
||
{
|
||
/* Some languages such as Ada need to search inside the program
|
||
minimal symbols for the location where to put the temporary
|
||
breakpoint before starting. */
|
||
if (!have_minimal_symbols ())
|
||
error (_("No symbol table loaded. Use the \"file\" command."));
|
||
|
||
/* Run the program until reaching the main procedure... */
|
||
run_command_1 (args, from_tty, RUN_STOP_AT_MAIN);
|
||
}
|
||
|
||
/* Start the execution of the program stopping at the first
|
||
instruction. */
|
||
|
||
static void
|
||
starti_command (const char *args, int from_tty)
|
||
{
|
||
run_command_1 (args, from_tty, RUN_STOP_AT_FIRST_INSN);
|
||
}
|
||
|
||
static int
|
||
proceed_thread_callback (struct thread_info *thread, void *arg)
|
||
{
|
||
/* We go through all threads individually instead of compressing
|
||
into a single target `resume_all' request, because some threads
|
||
may be stopped in internal breakpoints/events, or stopped waiting
|
||
for its turn in the displaced stepping queue (that is, they are
|
||
running && !executing). The target side has no idea about why
|
||
the thread is stopped, so a `resume_all' command would resume too
|
||
much. If/when GDB gains a way to tell the target `hold this
|
||
thread stopped until I say otherwise', then we can optimize
|
||
this. */
|
||
if (thread->state != THREAD_STOPPED)
|
||
return 0;
|
||
|
||
if (!thread->inf->has_execution ())
|
||
return 0;
|
||
|
||
switch_to_thread (thread);
|
||
clear_proceed_status (0);
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
ensure_valid_thread (void)
|
||
{
|
||
if (inferior_ptid == null_ptid
|
||
|| inferior_thread ()->state == THREAD_EXITED)
|
||
error (_("Cannot execute this command without a live selected thread."));
|
||
}
|
||
|
||
/* If the user is looking at trace frames, any resumption of execution
|
||
is likely to mix up recorded and live target data. So simply
|
||
disallow those commands. */
|
||
|
||
static void
|
||
ensure_not_tfind_mode (void)
|
||
{
|
||
if (get_traceframe_number () >= 0)
|
||
error (_("Cannot execute this command while looking at trace frames."));
|
||
}
|
||
|
||
/* Throw an error indicating the current thread is running. */
|
||
|
||
static void
|
||
error_is_running (void)
|
||
{
|
||
error (_("Cannot execute this command while "
|
||
"the selected thread is running."));
|
||
}
|
||
|
||
/* Calls error_is_running if the current thread is running. */
|
||
|
||
static void
|
||
ensure_not_running (void)
|
||
{
|
||
if (inferior_thread ()->state == THREAD_RUNNING)
|
||
error_is_running ();
|
||
}
|
||
|
||
void
|
||
continue_1 (int all_threads)
|
||
{
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
|
||
if (non_stop && all_threads)
|
||
{
|
||
/* Don't error out if the current thread is running, because
|
||
there may be other stopped threads. */
|
||
|
||
/* Backup current thread and selected frame and restore on scope
|
||
exit. */
|
||
scoped_restore_current_thread restore_thread;
|
||
|
||
iterate_over_threads (proceed_thread_callback, NULL);
|
||
|
||
if (current_ui->prompt_state == PROMPT_BLOCKED)
|
||
{
|
||
/* If all threads in the target were already running,
|
||
proceed_thread_callback ends up never calling proceed,
|
||
and so nothing calls this to put the inferior's terminal
|
||
settings in effect and remove stdin from the event loop,
|
||
which we must when running a foreground command. E.g.:
|
||
|
||
(gdb) c -a&
|
||
Continuing.
|
||
<all threads are running now>
|
||
(gdb) c -a
|
||
Continuing.
|
||
<no thread was resumed, but the inferior now owns the terminal>
|
||
*/
|
||
target_terminal::inferior ();
|
||
}
|
||
}
|
||
else
|
||
{
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
clear_proceed_status (0);
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
}
|
||
}
|
||
|
||
/* continue [-a] [proceed-count] [&] */
|
||
|
||
static void
|
||
continue_command (const char *args, int from_tty)
|
||
{
|
||
int async_exec;
|
||
bool all_threads_p = false;
|
||
|
||
ERROR_NO_INFERIOR;
|
||
|
||
/* Find out whether we must run in the background. */
|
||
gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
|
||
args = stripped.get ();
|
||
|
||
if (args != NULL)
|
||
{
|
||
if (startswith (args, "-a"))
|
||
{
|
||
all_threads_p = true;
|
||
args += sizeof ("-a") - 1;
|
||
if (*args == '\0')
|
||
args = NULL;
|
||
}
|
||
}
|
||
|
||
if (!non_stop && all_threads_p)
|
||
error (_("`-a' is meaningless in all-stop mode."));
|
||
|
||
if (args != NULL && all_threads_p)
|
||
error (_("Can't resume all threads and specify "
|
||
"proceed count simultaneously."));
|
||
|
||
/* If we have an argument left, set proceed count of breakpoint we
|
||
stopped at. */
|
||
if (args != NULL)
|
||
{
|
||
bpstat bs = NULL;
|
||
int num, stat;
|
||
int stopped = 0;
|
||
struct thread_info *tp;
|
||
|
||
if (non_stop)
|
||
tp = inferior_thread ();
|
||
else
|
||
{
|
||
process_stratum_target *last_target;
|
||
ptid_t last_ptid;
|
||
|
||
get_last_target_status (&last_target, &last_ptid, nullptr);
|
||
tp = find_thread_ptid (last_target, last_ptid);
|
||
}
|
||
if (tp != NULL)
|
||
bs = tp->control.stop_bpstat;
|
||
|
||
while ((stat = bpstat_num (&bs, &num)) != 0)
|
||
if (stat > 0)
|
||
{
|
||
set_ignore_count (num,
|
||
parse_and_eval_long (args) - 1,
|
||
from_tty);
|
||
/* set_ignore_count prints a message ending with a period.
|
||
So print two spaces before "Continuing.". */
|
||
if (from_tty)
|
||
printf_filtered (" ");
|
||
stopped = 1;
|
||
}
|
||
|
||
if (!stopped && from_tty)
|
||
{
|
||
printf_filtered
|
||
("Not stopped at any breakpoint; argument ignored.\n");
|
||
}
|
||
}
|
||
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
|
||
if (!non_stop || !all_threads_p)
|
||
{
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
}
|
||
|
||
prepare_execution_command (current_top_target (), async_exec);
|
||
|
||
if (from_tty)
|
||
printf_filtered (_("Continuing.\n"));
|
||
|
||
continue_1 (all_threads_p);
|
||
}
|
||
|
||
/* Record in TP the starting point of a "step" or "next" command. */
|
||
|
||
static void
|
||
set_step_frame (thread_info *tp)
|
||
{
|
||
/* This can be removed once this function no longer implicitly relies on the
|
||
inferior_ptid value. */
|
||
gdb_assert (inferior_ptid == tp->ptid);
|
||
|
||
frame_info *frame = get_current_frame ();
|
||
|
||
symtab_and_line sal = find_frame_sal (frame);
|
||
set_step_info (tp, frame, sal);
|
||
|
||
CORE_ADDR pc = get_frame_pc (frame);
|
||
tp->control.step_start_function = find_pc_function (pc);
|
||
}
|
||
|
||
/* Step until outside of current statement. */
|
||
|
||
static void
|
||
step_command (const char *count_string, int from_tty)
|
||
{
|
||
step_1 (0, 0, count_string);
|
||
}
|
||
|
||
/* Likewise, but skip over subroutine calls as if single instructions. */
|
||
|
||
static void
|
||
next_command (const char *count_string, int from_tty)
|
||
{
|
||
step_1 (1, 0, count_string);
|
||
}
|
||
|
||
/* Likewise, but step only one instruction. */
|
||
|
||
static void
|
||
stepi_command (const char *count_string, int from_tty)
|
||
{
|
||
step_1 (0, 1, count_string);
|
||
}
|
||
|
||
static void
|
||
nexti_command (const char *count_string, int from_tty)
|
||
{
|
||
step_1 (1, 1, count_string);
|
||
}
|
||
|
||
/* Data for the FSM that manages the step/next/stepi/nexti
|
||
commands. */
|
||
|
||
struct step_command_fsm : public thread_fsm
|
||
{
|
||
/* How many steps left in a "step N"-like command. */
|
||
int count;
|
||
|
||
/* If true, this is a next/nexti, otherwise a step/stepi. */
|
||
int skip_subroutines;
|
||
|
||
/* If true, this is a stepi/nexti, otherwise a step/step. */
|
||
int single_inst;
|
||
|
||
explicit step_command_fsm (struct interp *cmd_interp)
|
||
: thread_fsm (cmd_interp)
|
||
{
|
||
}
|
||
|
||
void clean_up (struct thread_info *thread) override;
|
||
bool should_stop (struct thread_info *thread) override;
|
||
enum async_reply_reason do_async_reply_reason () override;
|
||
};
|
||
|
||
/* Prepare for a step/next/etc. command. Any target resource
|
||
allocated here is undone in the FSM's clean_up method. */
|
||
|
||
static void
|
||
step_command_fsm_prepare (struct step_command_fsm *sm,
|
||
int skip_subroutines, int single_inst,
|
||
int count, struct thread_info *thread)
|
||
{
|
||
sm->skip_subroutines = skip_subroutines;
|
||
sm->single_inst = single_inst;
|
||
sm->count = count;
|
||
|
||
/* Leave the si command alone. */
|
||
if (!sm->single_inst || sm->skip_subroutines)
|
||
set_longjmp_breakpoint (thread, get_frame_id (get_current_frame ()));
|
||
|
||
thread->control.stepping_command = 1;
|
||
}
|
||
|
||
static int prepare_one_step (thread_info *, struct step_command_fsm *sm);
|
||
|
||
static void
|
||
step_1 (int skip_subroutines, int single_inst, const char *count_string)
|
||
{
|
||
int count;
|
||
int async_exec;
|
||
struct thread_info *thr;
|
||
struct step_command_fsm *step_sm;
|
||
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
|
||
gdb::unique_xmalloc_ptr<char> stripped
|
||
= strip_bg_char (count_string, &async_exec);
|
||
count_string = stripped.get ();
|
||
|
||
prepare_execution_command (current_top_target (), async_exec);
|
||
|
||
count = count_string ? parse_and_eval_long (count_string) : 1;
|
||
|
||
clear_proceed_status (1);
|
||
|
||
/* Setup the execution command state machine to handle all the COUNT
|
||
steps. */
|
||
thr = inferior_thread ();
|
||
step_sm = new step_command_fsm (command_interp ());
|
||
thr->thread_fsm = step_sm;
|
||
|
||
step_command_fsm_prepare (step_sm, skip_subroutines,
|
||
single_inst, count, thr);
|
||
|
||
/* Do only one step for now, before returning control to the event
|
||
loop. Let the continuation figure out how many other steps we
|
||
need to do, and handle them one at the time, through
|
||
step_once. */
|
||
if (!prepare_one_step (thr, step_sm))
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
else
|
||
{
|
||
int proceeded;
|
||
|
||
/* Stepped into an inline frame. Pretend that we've
|
||
stopped. */
|
||
thr->thread_fsm->clean_up (thr);
|
||
proceeded = normal_stop ();
|
||
if (!proceeded)
|
||
inferior_event_handler (INF_EXEC_COMPLETE, NULL);
|
||
all_uis_check_sync_execution_done ();
|
||
}
|
||
}
|
||
|
||
/* Implementation of the 'should_stop' FSM method for stepping
|
||
commands. Called after we are done with one step operation, to
|
||
check whether we need to step again, before we print the prompt and
|
||
return control to the user. If count is > 1, returns false, as we
|
||
will need to keep going. */
|
||
|
||
bool
|
||
step_command_fsm::should_stop (struct thread_info *tp)
|
||
{
|
||
if (tp->control.stop_step)
|
||
{
|
||
/* There are more steps to make, and we did stop due to
|
||
ending a stepping range. Do another step. */
|
||
if (--count > 0)
|
||
return prepare_one_step (tp, this);
|
||
|
||
set_finished ();
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Implementation of the 'clean_up' FSM method for stepping commands. */
|
||
|
||
void
|
||
step_command_fsm::clean_up (struct thread_info *thread)
|
||
{
|
||
if (!single_inst || skip_subroutines)
|
||
delete_longjmp_breakpoint (thread->global_num);
|
||
}
|
||
|
||
/* Implementation of the 'async_reply_reason' FSM method for stepping
|
||
commands. */
|
||
|
||
enum async_reply_reason
|
||
step_command_fsm::do_async_reply_reason ()
|
||
{
|
||
return EXEC_ASYNC_END_STEPPING_RANGE;
|
||
}
|
||
|
||
/* Prepare for one step in "step N". The actual target resumption is
|
||
done by the caller. Return true if we're done and should thus
|
||
report a stop to the user. Returns false if the target needs to be
|
||
resumed. */
|
||
|
||
static int
|
||
prepare_one_step (thread_info *tp, struct step_command_fsm *sm)
|
||
{
|
||
/* This can be removed once this function no longer implicitly relies on the
|
||
inferior_ptid value. */
|
||
gdb_assert (inferior_ptid == tp->ptid);
|
||
|
||
if (sm->count > 0)
|
||
{
|
||
struct frame_info *frame = get_current_frame ();
|
||
|
||
set_step_frame (tp);
|
||
|
||
if (!sm->single_inst)
|
||
{
|
||
CORE_ADDR pc;
|
||
|
||
/* Step at an inlined function behaves like "down". */
|
||
if (!sm->skip_subroutines
|
||
&& inline_skipped_frames (tp))
|
||
{
|
||
ptid_t resume_ptid;
|
||
const char *fn = NULL;
|
||
symtab_and_line sal;
|
||
struct symbol *sym;
|
||
|
||
/* Pretend that we've ran. */
|
||
resume_ptid = user_visible_resume_ptid (1);
|
||
set_running (tp->inf->process_target (), resume_ptid, true);
|
||
|
||
step_into_inline_frame (tp);
|
||
|
||
frame = get_current_frame ();
|
||
sal = find_frame_sal (frame);
|
||
sym = get_frame_function (frame);
|
||
|
||
if (sym != NULL)
|
||
fn = sym->print_name ();
|
||
|
||
if (sal.line == 0
|
||
|| !function_name_is_marked_for_skip (fn, sal))
|
||
{
|
||
sm->count--;
|
||
return prepare_one_step (tp, sm);
|
||
}
|
||
}
|
||
|
||
pc = get_frame_pc (frame);
|
||
find_pc_line_pc_range (pc,
|
||
&tp->control.step_range_start,
|
||
&tp->control.step_range_end);
|
||
|
||
tp->control.may_range_step = 1;
|
||
|
||
/* If we have no line info, switch to stepi mode. */
|
||
if (tp->control.step_range_end == 0 && step_stop_if_no_debug)
|
||
{
|
||
tp->control.step_range_start = tp->control.step_range_end = 1;
|
||
tp->control.may_range_step = 0;
|
||
}
|
||
else if (tp->control.step_range_end == 0)
|
||
{
|
||
const char *name;
|
||
|
||
if (find_pc_partial_function (pc, &name,
|
||
&tp->control.step_range_start,
|
||
&tp->control.step_range_end) == 0)
|
||
error (_("Cannot find bounds of current function"));
|
||
|
||
target_terminal::ours_for_output ();
|
||
printf_filtered (_("Single stepping until exit from function %s,"
|
||
"\nwhich has no line number information.\n"),
|
||
name);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Say we are stepping, but stop after one insn whatever it does. */
|
||
tp->control.step_range_start = tp->control.step_range_end = 1;
|
||
if (!sm->skip_subroutines)
|
||
/* It is stepi.
|
||
Don't step over function calls, not even to functions lacking
|
||
line numbers. */
|
||
tp->control.step_over_calls = STEP_OVER_NONE;
|
||
}
|
||
|
||
if (sm->skip_subroutines)
|
||
tp->control.step_over_calls = STEP_OVER_ALL;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Done. */
|
||
sm->set_finished ();
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Continue program at specified address. */
|
||
|
||
static void
|
||
jump_command (const char *arg, int from_tty)
|
||
{
|
||
struct gdbarch *gdbarch = get_current_arch ();
|
||
CORE_ADDR addr;
|
||
struct symbol *fn;
|
||
struct symbol *sfn;
|
||
int async_exec;
|
||
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
|
||
/* Find out whether we must run in the background. */
|
||
gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
|
||
arg = stripped.get ();
|
||
|
||
prepare_execution_command (current_top_target (), async_exec);
|
||
|
||
if (!arg)
|
||
error_no_arg (_("starting address"));
|
||
|
||
std::vector<symtab_and_line> sals
|
||
= decode_line_with_last_displayed (arg, DECODE_LINE_FUNFIRSTLINE);
|
||
if (sals.size () != 1)
|
||
error (_("Unreasonable jump request"));
|
||
|
||
symtab_and_line &sal = sals[0];
|
||
|
||
if (sal.symtab == 0 && sal.pc == 0)
|
||
error (_("No source file has been specified."));
|
||
|
||
resolve_sal_pc (&sal); /* May error out. */
|
||
|
||
/* See if we are trying to jump to another function. */
|
||
fn = get_frame_function (get_current_frame ());
|
||
sfn = find_pc_function (sal.pc);
|
||
if (fn != NULL && sfn != fn)
|
||
{
|
||
if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal.line,
|
||
fn->print_name ()))
|
||
{
|
||
error (_("Not confirmed."));
|
||
/* NOTREACHED */
|
||
}
|
||
}
|
||
|
||
if (sfn != NULL)
|
||
{
|
||
struct obj_section *section;
|
||
|
||
fixup_symbol_section (sfn, 0);
|
||
section = SYMBOL_OBJ_SECTION (symbol_objfile (sfn), sfn);
|
||
if (section_is_overlay (section)
|
||
&& !section_is_mapped (section))
|
||
{
|
||
if (!query (_("WARNING!!! Destination is in "
|
||
"unmapped overlay! Jump anyway? ")))
|
||
{
|
||
error (_("Not confirmed."));
|
||
/* NOTREACHED */
|
||
}
|
||
}
|
||
}
|
||
|
||
addr = sal.pc;
|
||
|
||
if (from_tty)
|
||
{
|
||
printf_filtered (_("Continuing at "));
|
||
fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
|
||
printf_filtered (".\n");
|
||
}
|
||
|
||
clear_proceed_status (0);
|
||
proceed (addr, GDB_SIGNAL_0);
|
||
}
|
||
|
||
/* Continue program giving it specified signal. */
|
||
|
||
static void
|
||
signal_command (const char *signum_exp, int from_tty)
|
||
{
|
||
enum gdb_signal oursig;
|
||
int async_exec;
|
||
|
||
dont_repeat (); /* Too dangerous. */
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
|
||
/* Find out whether we must run in the background. */
|
||
gdb::unique_xmalloc_ptr<char> stripped
|
||
= strip_bg_char (signum_exp, &async_exec);
|
||
signum_exp = stripped.get ();
|
||
|
||
prepare_execution_command (current_top_target (), async_exec);
|
||
|
||
if (!signum_exp)
|
||
error_no_arg (_("signal number"));
|
||
|
||
/* It would be even slicker to make signal names be valid expressions,
|
||
(the type could be "enum $signal" or some such), then the user could
|
||
assign them to convenience variables. */
|
||
oursig = gdb_signal_from_name (signum_exp);
|
||
|
||
if (oursig == GDB_SIGNAL_UNKNOWN)
|
||
{
|
||
/* No, try numeric. */
|
||
int num = parse_and_eval_long (signum_exp);
|
||
|
||
if (num == 0)
|
||
oursig = GDB_SIGNAL_0;
|
||
else
|
||
oursig = gdb_signal_from_command (num);
|
||
}
|
||
|
||
/* Look for threads other than the current that this command ends up
|
||
resuming too (due to schedlock off), and warn if they'll get a
|
||
signal delivered. "signal 0" is used to suppress a previous
|
||
signal, but if the current thread is no longer the one that got
|
||
the signal, then the user is potentially suppressing the signal
|
||
of the wrong thread. */
|
||
if (!non_stop)
|
||
{
|
||
int must_confirm = 0;
|
||
|
||
/* This indicates what will be resumed. Either a single thread,
|
||
a whole process, or all threads of all processes. */
|
||
ptid_t resume_ptid = user_visible_resume_ptid (0);
|
||
process_stratum_target *resume_target
|
||
= user_visible_resume_target (resume_ptid);
|
||
|
||
thread_info *current = inferior_thread ();
|
||
|
||
for (thread_info *tp : all_non_exited_threads (resume_target, resume_ptid))
|
||
{
|
||
if (tp == current)
|
||
continue;
|
||
|
||
if (tp->suspend.stop_signal != GDB_SIGNAL_0
|
||
&& signal_pass_state (tp->suspend.stop_signal))
|
||
{
|
||
if (!must_confirm)
|
||
printf_unfiltered (_("Note:\n"));
|
||
printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
|
||
print_thread_id (tp),
|
||
gdb_signal_to_name (tp->suspend.stop_signal),
|
||
gdb_signal_to_string (tp->suspend.stop_signal));
|
||
must_confirm = 1;
|
||
}
|
||
}
|
||
|
||
if (must_confirm
|
||
&& !query (_("Continuing thread %s (the current thread) with specified signal will\n"
|
||
"still deliver the signals noted above to their respective threads.\n"
|
||
"Continue anyway? "),
|
||
print_thread_id (inferior_thread ())))
|
||
error (_("Not confirmed."));
|
||
}
|
||
|
||
if (from_tty)
|
||
{
|
||
if (oursig == GDB_SIGNAL_0)
|
||
printf_filtered (_("Continuing with no signal.\n"));
|
||
else
|
||
printf_filtered (_("Continuing with signal %s.\n"),
|
||
gdb_signal_to_name (oursig));
|
||
}
|
||
|
||
clear_proceed_status (0);
|
||
proceed ((CORE_ADDR) -1, oursig);
|
||
}
|
||
|
||
/* Queue a signal to be delivered to the current thread. */
|
||
|
||
static void
|
||
queue_signal_command (const char *signum_exp, int from_tty)
|
||
{
|
||
enum gdb_signal oursig;
|
||
struct thread_info *tp;
|
||
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
|
||
if (signum_exp == NULL)
|
||
error_no_arg (_("signal number"));
|
||
|
||
/* It would be even slicker to make signal names be valid expressions,
|
||
(the type could be "enum $signal" or some such), then the user could
|
||
assign them to convenience variables. */
|
||
oursig = gdb_signal_from_name (signum_exp);
|
||
|
||
if (oursig == GDB_SIGNAL_UNKNOWN)
|
||
{
|
||
/* No, try numeric. */
|
||
int num = parse_and_eval_long (signum_exp);
|
||
|
||
if (num == 0)
|
||
oursig = GDB_SIGNAL_0;
|
||
else
|
||
oursig = gdb_signal_from_command (num);
|
||
}
|
||
|
||
if (oursig != GDB_SIGNAL_0
|
||
&& !signal_pass_state (oursig))
|
||
error (_("Signal handling set to not pass this signal to the program."));
|
||
|
||
tp = inferior_thread ();
|
||
tp->suspend.stop_signal = oursig;
|
||
}
|
||
|
||
/* Data for the FSM that manages the until (with no argument)
|
||
command. */
|
||
|
||
struct until_next_fsm : public thread_fsm
|
||
{
|
||
/* The thread that as current when the command was executed. */
|
||
int thread;
|
||
|
||
until_next_fsm (struct interp *cmd_interp, int thread)
|
||
: thread_fsm (cmd_interp),
|
||
thread (thread)
|
||
{
|
||
}
|
||
|
||
bool should_stop (struct thread_info *thread) override;
|
||
void clean_up (struct thread_info *thread) override;
|
||
enum async_reply_reason do_async_reply_reason () override;
|
||
};
|
||
|
||
/* Implementation of the 'should_stop' FSM method for the until (with
|
||
no arg) command. */
|
||
|
||
bool
|
||
until_next_fsm::should_stop (struct thread_info *tp)
|
||
{
|
||
if (tp->control.stop_step)
|
||
set_finished ();
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Implementation of the 'clean_up' FSM method for the until (with no
|
||
arg) command. */
|
||
|
||
void
|
||
until_next_fsm::clean_up (struct thread_info *thread)
|
||
{
|
||
delete_longjmp_breakpoint (thread->global_num);
|
||
}
|
||
|
||
/* Implementation of the 'async_reply_reason' FSM method for the until
|
||
(with no arg) command. */
|
||
|
||
enum async_reply_reason
|
||
until_next_fsm::do_async_reply_reason ()
|
||
{
|
||
return EXEC_ASYNC_END_STEPPING_RANGE;
|
||
}
|
||
|
||
/* Proceed until we reach a different source line with pc greater than
|
||
our current one or exit the function. We skip calls in both cases.
|
||
|
||
Note that eventually this command should probably be changed so
|
||
that only source lines are printed out when we hit the breakpoint
|
||
we set. This may involve changes to wait_for_inferior and the
|
||
proceed status code. */
|
||
|
||
static void
|
||
until_next_command (int from_tty)
|
||
{
|
||
struct frame_info *frame;
|
||
CORE_ADDR pc;
|
||
struct symbol *func;
|
||
struct symtab_and_line sal;
|
||
struct thread_info *tp = inferior_thread ();
|
||
int thread = tp->global_num;
|
||
struct until_next_fsm *sm;
|
||
|
||
clear_proceed_status (0);
|
||
set_step_frame (tp);
|
||
|
||
frame = get_current_frame ();
|
||
|
||
/* Step until either exited from this function or greater
|
||
than the current line (if in symbolic section) or pc (if
|
||
not). */
|
||
|
||
pc = get_frame_pc (frame);
|
||
func = find_pc_function (pc);
|
||
|
||
if (!func)
|
||
{
|
||
struct bound_minimal_symbol msymbol = lookup_minimal_symbol_by_pc (pc);
|
||
|
||
if (msymbol.minsym == NULL)
|
||
error (_("Execution is not within a known function."));
|
||
|
||
tp->control.step_range_start = BMSYMBOL_VALUE_ADDRESS (msymbol);
|
||
/* The upper-bound of step_range is exclusive. In order to make PC
|
||
within the range, set the step_range_end with PC + 1. */
|
||
tp->control.step_range_end = pc + 1;
|
||
}
|
||
else
|
||
{
|
||
sal = find_pc_line (pc, 0);
|
||
|
||
tp->control.step_range_start = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func));
|
||
tp->control.step_range_end = sal.end;
|
||
}
|
||
tp->control.may_range_step = 1;
|
||
|
||
tp->control.step_over_calls = STEP_OVER_ALL;
|
||
|
||
set_longjmp_breakpoint (tp, get_frame_id (frame));
|
||
delete_longjmp_breakpoint_cleanup lj_deleter (thread);
|
||
|
||
sm = new until_next_fsm (command_interp (), tp->global_num);
|
||
tp->thread_fsm = sm;
|
||
lj_deleter.release ();
|
||
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
}
|
||
|
||
static void
|
||
until_command (const char *arg, int from_tty)
|
||
{
|
||
int async_exec;
|
||
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
|
||
/* Find out whether we must run in the background. */
|
||
gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
|
||
arg = stripped.get ();
|
||
|
||
prepare_execution_command (current_top_target (), async_exec);
|
||
|
||
if (arg)
|
||
until_break_command (arg, from_tty, 0);
|
||
else
|
||
until_next_command (from_tty);
|
||
}
|
||
|
||
static void
|
||
advance_command (const char *arg, int from_tty)
|
||
{
|
||
int async_exec;
|
||
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
|
||
if (arg == NULL)
|
||
error_no_arg (_("a location"));
|
||
|
||
/* Find out whether we must run in the background. */
|
||
gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
|
||
arg = stripped.get ();
|
||
|
||
prepare_execution_command (current_top_target (), async_exec);
|
||
|
||
until_break_command (arg, from_tty, 1);
|
||
}
|
||
|
||
/* Return the value of the result of a function at the end of a 'finish'
|
||
command/BP. DTOR_DATA (if not NULL) can represent inferior registers
|
||
right after an inferior call has finished. */
|
||
|
||
struct value *
|
||
get_return_value (struct value *function, struct type *value_type)
|
||
{
|
||
regcache *stop_regs = get_current_regcache ();
|
||
struct gdbarch *gdbarch = stop_regs->arch ();
|
||
struct value *value;
|
||
|
||
value_type = check_typedef (value_type);
|
||
gdb_assert (TYPE_CODE (value_type) != TYPE_CODE_VOID);
|
||
|
||
/* FIXME: 2003-09-27: When returning from a nested inferior function
|
||
call, it's possible (with no help from the architecture vector)
|
||
to locate and return/print a "struct return" value. This is just
|
||
a more complicated case of what is already being done in the
|
||
inferior function call code. In fact, when inferior function
|
||
calls are made async, this will likely be made the norm. */
|
||
|
||
switch (gdbarch_return_value (gdbarch, function, value_type,
|
||
NULL, NULL, NULL))
|
||
{
|
||
case RETURN_VALUE_REGISTER_CONVENTION:
|
||
case RETURN_VALUE_ABI_RETURNS_ADDRESS:
|
||
case RETURN_VALUE_ABI_PRESERVES_ADDRESS:
|
||
value = allocate_value (value_type);
|
||
gdbarch_return_value (gdbarch, function, value_type, stop_regs,
|
||
value_contents_raw (value), NULL);
|
||
break;
|
||
case RETURN_VALUE_STRUCT_CONVENTION:
|
||
value = NULL;
|
||
break;
|
||
default:
|
||
internal_error (__FILE__, __LINE__, _("bad switch"));
|
||
}
|
||
|
||
return value;
|
||
}
|
||
|
||
/* The captured function return value/type and its position in the
|
||
value history. */
|
||
|
||
struct return_value_info
|
||
{
|
||
/* The captured return value. May be NULL if we weren't able to
|
||
retrieve it. See get_return_value. */
|
||
struct value *value;
|
||
|
||
/* The return type. In some cases, we'll not be able extract the
|
||
return value, but we always know the type. */
|
||
struct type *type;
|
||
|
||
/* If we captured a value, this is the value history index. */
|
||
int value_history_index;
|
||
};
|
||
|
||
/* Helper for print_return_value. */
|
||
|
||
static void
|
||
print_return_value_1 (struct ui_out *uiout, struct return_value_info *rv)
|
||
{
|
||
if (rv->value != NULL)
|
||
{
|
||
struct value_print_options opts;
|
||
|
||
/* Print it. */
|
||
uiout->text ("Value returned is ");
|
||
uiout->field_fmt ("gdb-result-var", "$%d",
|
||
rv->value_history_index);
|
||
uiout->text (" = ");
|
||
get_user_print_options (&opts);
|
||
|
||
if (opts.finish_print)
|
||
{
|
||
string_file stb;
|
||
value_print (rv->value, &stb, &opts);
|
||
uiout->field_stream ("return-value", stb);
|
||
}
|
||
else
|
||
uiout->field_string ("return-value", _("<not displayed>"),
|
||
metadata_style.style ());
|
||
uiout->text ("\n");
|
||
}
|
||
else
|
||
{
|
||
std::string type_name = type_to_string (rv->type);
|
||
uiout->text ("Value returned has type: ");
|
||
uiout->field_string ("return-type", type_name.c_str ());
|
||
uiout->text (".");
|
||
uiout->text (" Cannot determine contents\n");
|
||
}
|
||
}
|
||
|
||
/* Print the result of a function at the end of a 'finish' command.
|
||
RV points at an object representing the captured return value/type
|
||
and its position in the value history. */
|
||
|
||
void
|
||
print_return_value (struct ui_out *uiout, struct return_value_info *rv)
|
||
{
|
||
if (rv->type == NULL
|
||
|| TYPE_CODE (check_typedef (rv->type)) == TYPE_CODE_VOID)
|
||
return;
|
||
|
||
try
|
||
{
|
||
/* print_return_value_1 can throw an exception in some
|
||
circumstances. We need to catch this so that we still
|
||
delete the breakpoint. */
|
||
print_return_value_1 (uiout, rv);
|
||
}
|
||
catch (const gdb_exception &ex)
|
||
{
|
||
exception_print (gdb_stdout, ex);
|
||
}
|
||
}
|
||
|
||
/* Data for the FSM that manages the finish command. */
|
||
|
||
struct finish_command_fsm : public thread_fsm
|
||
{
|
||
/* The momentary breakpoint set at the function's return address in
|
||
the caller. */
|
||
breakpoint_up breakpoint;
|
||
|
||
/* The function that we're stepping out of. */
|
||
struct symbol *function = nullptr;
|
||
|
||
/* If the FSM finishes successfully, this stores the function's
|
||
return value. */
|
||
struct return_value_info return_value_info {};
|
||
|
||
explicit finish_command_fsm (struct interp *cmd_interp)
|
||
: thread_fsm (cmd_interp)
|
||
{
|
||
}
|
||
|
||
bool should_stop (struct thread_info *thread) override;
|
||
void clean_up (struct thread_info *thread) override;
|
||
struct return_value_info *return_value () override;
|
||
enum async_reply_reason do_async_reply_reason () override;
|
||
};
|
||
|
||
/* Implementation of the 'should_stop' FSM method for the finish
|
||
commands. Detects whether the thread stepped out of the function
|
||
successfully, and if so, captures the function's return value and
|
||
marks the FSM finished. */
|
||
|
||
bool
|
||
finish_command_fsm::should_stop (struct thread_info *tp)
|
||
{
|
||
struct return_value_info *rv = &return_value_info;
|
||
|
||
if (function != NULL
|
||
&& bpstat_find_breakpoint (tp->control.stop_bpstat,
|
||
breakpoint.get ()) != NULL)
|
||
{
|
||
/* We're done. */
|
||
set_finished ();
|
||
|
||
rv->type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function));
|
||
if (rv->type == NULL)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("finish_command: function has no target type"));
|
||
|
||
if (TYPE_CODE (check_typedef (rv->type)) != TYPE_CODE_VOID)
|
||
{
|
||
struct value *func;
|
||
|
||
func = read_var_value (function, NULL, get_current_frame ());
|
||
rv->value = get_return_value (func, rv->type);
|
||
if (rv->value != NULL)
|
||
rv->value_history_index = record_latest_value (rv->value);
|
||
}
|
||
}
|
||
else if (tp->control.stop_step)
|
||
{
|
||
/* Finishing from an inline frame, or reverse finishing. In
|
||
either case, there's no way to retrieve the return value. */
|
||
set_finished ();
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Implementation of the 'clean_up' FSM method for the finish
|
||
commands. */
|
||
|
||
void
|
||
finish_command_fsm::clean_up (struct thread_info *thread)
|
||
{
|
||
breakpoint.reset ();
|
||
delete_longjmp_breakpoint (thread->global_num);
|
||
}
|
||
|
||
/* Implementation of the 'return_value' FSM method for the finish
|
||
commands. */
|
||
|
||
struct return_value_info *
|
||
finish_command_fsm::return_value ()
|
||
{
|
||
return &return_value_info;
|
||
}
|
||
|
||
/* Implementation of the 'async_reply_reason' FSM method for the
|
||
finish commands. */
|
||
|
||
enum async_reply_reason
|
||
finish_command_fsm::do_async_reply_reason ()
|
||
{
|
||
if (execution_direction == EXEC_REVERSE)
|
||
return EXEC_ASYNC_END_STEPPING_RANGE;
|
||
else
|
||
return EXEC_ASYNC_FUNCTION_FINISHED;
|
||
}
|
||
|
||
/* finish_backward -- helper function for finish_command. */
|
||
|
||
static void
|
||
finish_backward (struct finish_command_fsm *sm)
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct thread_info *tp = inferior_thread ();
|
||
CORE_ADDR pc;
|
||
CORE_ADDR func_addr;
|
||
|
||
pc = get_frame_pc (get_current_frame ());
|
||
|
||
if (find_pc_partial_function (pc, NULL, &func_addr, NULL) == 0)
|
||
error (_("Cannot find bounds of current function"));
|
||
|
||
sal = find_pc_line (func_addr, 0);
|
||
|
||
tp->control.proceed_to_finish = 1;
|
||
/* Special case: if we're sitting at the function entry point,
|
||
then all we need to do is take a reverse singlestep. We
|
||
don't need to set a breakpoint, and indeed it would do us
|
||
no good to do so.
|
||
|
||
Note that this can only happen at frame #0, since there's
|
||
no way that a function up the stack can have a return address
|
||
that's equal to its entry point. */
|
||
|
||
if (sal.pc != pc)
|
||
{
|
||
struct frame_info *frame = get_selected_frame (NULL);
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
|
||
/* Set a step-resume at the function's entry point. Once that's
|
||
hit, we'll do one more step backwards. */
|
||
symtab_and_line sr_sal;
|
||
sr_sal.pc = sal.pc;
|
||
sr_sal.pspace = get_frame_program_space (frame);
|
||
insert_step_resume_breakpoint_at_sal (gdbarch,
|
||
sr_sal, null_frame_id);
|
||
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
}
|
||
else
|
||
{
|
||
/* We're almost there -- we just need to back up by one more
|
||
single-step. */
|
||
tp->control.step_range_start = tp->control.step_range_end = 1;
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
}
|
||
}
|
||
|
||
/* finish_forward -- helper function for finish_command. FRAME is the
|
||
frame that called the function we're about to step out of. */
|
||
|
||
static void
|
||
finish_forward (struct finish_command_fsm *sm, struct frame_info *frame)
|
||
{
|
||
struct frame_id frame_id = get_frame_id (frame);
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
struct symtab_and_line sal;
|
||
struct thread_info *tp = inferior_thread ();
|
||
|
||
sal = find_pc_line (get_frame_pc (frame), 0);
|
||
sal.pc = get_frame_pc (frame);
|
||
|
||
sm->breakpoint = set_momentary_breakpoint (gdbarch, sal,
|
||
get_stack_frame_id (frame),
|
||
bp_finish);
|
||
|
||
/* set_momentary_breakpoint invalidates FRAME. */
|
||
frame = NULL;
|
||
|
||
set_longjmp_breakpoint (tp, frame_id);
|
||
|
||
/* We want to print return value, please... */
|
||
tp->control.proceed_to_finish = 1;
|
||
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
}
|
||
|
||
/* Skip frames for "finish". */
|
||
|
||
static struct frame_info *
|
||
skip_finish_frames (struct frame_info *frame)
|
||
{
|
||
struct frame_info *start;
|
||
|
||
do
|
||
{
|
||
start = frame;
|
||
|
||
frame = skip_tailcall_frames (frame);
|
||
if (frame == NULL)
|
||
break;
|
||
|
||
frame = skip_unwritable_frames (frame);
|
||
if (frame == NULL)
|
||
break;
|
||
}
|
||
while (start != frame);
|
||
|
||
return frame;
|
||
}
|
||
|
||
/* "finish": Set a temporary breakpoint at the place the selected
|
||
frame will return to, then continue. */
|
||
|
||
static void
|
||
finish_command (const char *arg, int from_tty)
|
||
{
|
||
struct frame_info *frame;
|
||
int async_exec;
|
||
struct finish_command_fsm *sm;
|
||
struct thread_info *tp;
|
||
|
||
ERROR_NO_INFERIOR;
|
||
ensure_not_tfind_mode ();
|
||
ensure_valid_thread ();
|
||
ensure_not_running ();
|
||
|
||
/* Find out whether we must run in the background. */
|
||
gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
|
||
arg = stripped.get ();
|
||
|
||
prepare_execution_command (current_top_target (), async_exec);
|
||
|
||
if (arg)
|
||
error (_("The \"finish\" command does not take any arguments."));
|
||
|
||
frame = get_prev_frame (get_selected_frame (_("No selected frame.")));
|
||
if (frame == 0)
|
||
error (_("\"finish\" not meaningful in the outermost frame."));
|
||
|
||
clear_proceed_status (0);
|
||
|
||
tp = inferior_thread ();
|
||
|
||
sm = new finish_command_fsm (command_interp ());
|
||
|
||
tp->thread_fsm = sm;
|
||
|
||
/* Finishing from an inline frame is completely different. We don't
|
||
try to show the "return value" - no way to locate it. */
|
||
if (get_frame_type (get_selected_frame (_("No selected frame.")))
|
||
== INLINE_FRAME)
|
||
{
|
||
/* Claim we are stepping in the calling frame. An empty step
|
||
range means that we will stop once we aren't in a function
|
||
called by that frame. We don't use the magic "1" value for
|
||
step_range_end, because then infrun will think this is nexti,
|
||
and not step over the rest of this inlined function call. */
|
||
set_step_info (tp, frame, {});
|
||
tp->control.step_range_start = get_frame_pc (frame);
|
||
tp->control.step_range_end = tp->control.step_range_start;
|
||
tp->control.step_over_calls = STEP_OVER_ALL;
|
||
|
||
/* Print info on the selected frame, including level number but not
|
||
source. */
|
||
if (from_tty)
|
||
{
|
||
printf_filtered (_("Run till exit from "));
|
||
print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0);
|
||
}
|
||
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
return;
|
||
}
|
||
|
||
/* Find the function we will return from. */
|
||
|
||
sm->function = find_pc_function (get_frame_pc (get_selected_frame (NULL)));
|
||
|
||
/* Print info on the selected frame, including level number but not
|
||
source. */
|
||
if (from_tty)
|
||
{
|
||
if (execution_direction == EXEC_REVERSE)
|
||
printf_filtered (_("Run back to call of "));
|
||
else
|
||
{
|
||
if (sm->function != NULL && TYPE_NO_RETURN (sm->function->type)
|
||
&& !query (_("warning: Function %s does not return normally.\n"
|
||
"Try to finish anyway? "),
|
||
sm->function->print_name ()))
|
||
error (_("Not confirmed."));
|
||
printf_filtered (_("Run till exit from "));
|
||
}
|
||
|
||
print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0);
|
||
}
|
||
|
||
if (execution_direction == EXEC_REVERSE)
|
||
finish_backward (sm);
|
||
else
|
||
{
|
||
frame = skip_finish_frames (frame);
|
||
|
||
if (frame == NULL)
|
||
error (_("Cannot find the caller frame."));
|
||
|
||
finish_forward (sm, frame);
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
info_program_command (const char *args, int from_tty)
|
||
{
|
||
bpstat bs;
|
||
int num, stat;
|
||
ptid_t ptid;
|
||
process_stratum_target *proc_target;
|
||
|
||
if (!target_has_execution)
|
||
{
|
||
printf_filtered (_("The program being debugged is not being run.\n"));
|
||
return;
|
||
}
|
||
|
||
if (non_stop)
|
||
{
|
||
ptid = inferior_ptid;
|
||
proc_target = current_inferior ()->process_target ();
|
||
}
|
||
else
|
||
get_last_target_status (&proc_target, &ptid, nullptr);
|
||
|
||
if (ptid == null_ptid || ptid == minus_one_ptid)
|
||
error (_("No selected thread."));
|
||
|
||
thread_info *tp = find_thread_ptid (proc_target, ptid);
|
||
|
||
if (tp->state == THREAD_EXITED)
|
||
error (_("Invalid selected thread."));
|
||
else if (tp->state == THREAD_RUNNING)
|
||
error (_("Selected thread is running."));
|
||
|
||
bs = tp->control.stop_bpstat;
|
||
stat = bpstat_num (&bs, &num);
|
||
|
||
target_files_info ();
|
||
printf_filtered (_("Program stopped at %s.\n"),
|
||
paddress (target_gdbarch (), tp->suspend.stop_pc));
|
||
if (tp->control.stop_step)
|
||
printf_filtered (_("It stopped after being stepped.\n"));
|
||
else if (stat != 0)
|
||
{
|
||
/* There may be several breakpoints in the same place, so this
|
||
isn't as strange as it seems. */
|
||
while (stat != 0)
|
||
{
|
||
if (stat < 0)
|
||
{
|
||
printf_filtered (_("It stopped at a breakpoint "
|
||
"that has since been deleted.\n"));
|
||
}
|
||
else
|
||
printf_filtered (_("It stopped at breakpoint %d.\n"), num);
|
||
stat = bpstat_num (&bs, &num);
|
||
}
|
||
}
|
||
else if (tp->suspend.stop_signal != GDB_SIGNAL_0)
|
||
{
|
||
printf_filtered (_("It stopped with signal %s, %s.\n"),
|
||
gdb_signal_to_name (tp->suspend.stop_signal),
|
||
gdb_signal_to_string (tp->suspend.stop_signal));
|
||
}
|
||
|
||
if (from_tty)
|
||
{
|
||
printf_filtered (_("Type \"info stack\" or \"info "
|
||
"registers\" for more information.\n"));
|
||
}
|
||
}
|
||
|
||
static void
|
||
environment_info (const char *var, int from_tty)
|
||
{
|
||
if (var)
|
||
{
|
||
const char *val = current_inferior ()->environment.get (var);
|
||
|
||
if (val)
|
||
{
|
||
puts_filtered (var);
|
||
puts_filtered (" = ");
|
||
puts_filtered (val);
|
||
puts_filtered ("\n");
|
||
}
|
||
else
|
||
{
|
||
puts_filtered ("Environment variable \"");
|
||
puts_filtered (var);
|
||
puts_filtered ("\" not defined.\n");
|
||
}
|
||
}
|
||
else
|
||
{
|
||
char **envp = current_inferior ()->environment.envp ();
|
||
|
||
for (int idx = 0; envp[idx] != NULL; ++idx)
|
||
{
|
||
puts_filtered (envp[idx]);
|
||
puts_filtered ("\n");
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
set_environment_command (const char *arg, int from_tty)
|
||
{
|
||
const char *p, *val;
|
||
int nullset = 0;
|
||
|
||
if (arg == 0)
|
||
error_no_arg (_("environment variable and value"));
|
||
|
||
/* Find separation between variable name and value. */
|
||
p = (char *) strchr (arg, '=');
|
||
val = (char *) strchr (arg, ' ');
|
||
|
||
if (p != 0 && val != 0)
|
||
{
|
||
/* We have both a space and an equals. If the space is before the
|
||
equals, walk forward over the spaces til we see a nonspace
|
||
(possibly the equals). */
|
||
if (p > val)
|
||
while (*val == ' ')
|
||
val++;
|
||
|
||
/* Now if the = is after the char following the spaces,
|
||
take the char following the spaces. */
|
||
if (p > val)
|
||
p = val - 1;
|
||
}
|
||
else if (val != 0 && p == 0)
|
||
p = val;
|
||
|
||
if (p == arg)
|
||
error_no_arg (_("environment variable to set"));
|
||
|
||
if (p == 0 || p[1] == 0)
|
||
{
|
||
nullset = 1;
|
||
if (p == 0)
|
||
p = arg + strlen (arg); /* So that savestring below will work. */
|
||
}
|
||
else
|
||
{
|
||
/* Not setting variable value to null. */
|
||
val = p + 1;
|
||
while (*val == ' ' || *val == '\t')
|
||
val++;
|
||
}
|
||
|
||
while (p != arg && (p[-1] == ' ' || p[-1] == '\t'))
|
||
p--;
|
||
|
||
std::string var (arg, p - arg);
|
||
if (nullset)
|
||
{
|
||
printf_filtered (_("Setting environment variable "
|
||
"\"%s\" to null value.\n"),
|
||
var.c_str ());
|
||
current_inferior ()->environment.set (var.c_str (), "");
|
||
}
|
||
else
|
||
current_inferior ()->environment.set (var.c_str (), val);
|
||
}
|
||
|
||
static void
|
||
unset_environment_command (const char *var, int from_tty)
|
||
{
|
||
if (var == 0)
|
||
{
|
||
/* If there is no argument, delete all environment variables.
|
||
Ask for confirmation if reading from the terminal. */
|
||
if (!from_tty || query (_("Delete all environment variables? ")))
|
||
current_inferior ()->environment.clear ();
|
||
}
|
||
else
|
||
current_inferior ()->environment.unset (var);
|
||
}
|
||
|
||
/* Handle the execution path (PATH variable). */
|
||
|
||
static const char path_var_name[] = "PATH";
|
||
|
||
static void
|
||
path_info (const char *args, int from_tty)
|
||
{
|
||
puts_filtered ("Executable and object file path: ");
|
||
puts_filtered (current_inferior ()->environment.get (path_var_name));
|
||
puts_filtered ("\n");
|
||
}
|
||
|
||
/* Add zero or more directories to the front of the execution path. */
|
||
|
||
static void
|
||
path_command (const char *dirname, int from_tty)
|
||
{
|
||
char *exec_path;
|
||
const char *env;
|
||
|
||
dont_repeat ();
|
||
env = current_inferior ()->environment.get (path_var_name);
|
||
/* Can be null if path is not set. */
|
||
if (!env)
|
||
env = "";
|
||
exec_path = xstrdup (env);
|
||
mod_path (dirname, &exec_path);
|
||
current_inferior ()->environment.set (path_var_name, exec_path);
|
||
xfree (exec_path);
|
||
if (from_tty)
|
||
path_info (NULL, from_tty);
|
||
}
|
||
|
||
|
||
static void
|
||
pad_to_column (string_file &stream, int col)
|
||
{
|
||
/* At least one space must be printed to separate columns. */
|
||
stream.putc (' ');
|
||
const int size = stream.size ();
|
||
if (size < col)
|
||
stream.puts (n_spaces (col - size));
|
||
}
|
||
|
||
/* Print out the register NAME with value VAL, to FILE, in the default
|
||
fashion. */
|
||
|
||
static void
|
||
default_print_one_register_info (struct ui_file *file,
|
||
const char *name,
|
||
struct value *val)
|
||
{
|
||
struct type *regtype = value_type (val);
|
||
int print_raw_format;
|
||
string_file format_stream;
|
||
enum tab_stops
|
||
{
|
||
value_column_1 = 15,
|
||
/* Give enough room for "0x", 16 hex digits and two spaces in
|
||
preceding column. */
|
||
value_column_2 = value_column_1 + 2 + 16 + 2,
|
||
};
|
||
|
||
format_stream.puts (name);
|
||
pad_to_column (format_stream, value_column_1);
|
||
|
||
print_raw_format = (value_entirely_available (val)
|
||
&& !value_optimized_out (val));
|
||
|
||
/* If virtual format is floating, print it that way, and in raw
|
||
hex. */
|
||
if (TYPE_CODE (regtype) == TYPE_CODE_FLT
|
||
|| TYPE_CODE (regtype) == TYPE_CODE_DECFLOAT)
|
||
{
|
||
struct value_print_options opts;
|
||
const gdb_byte *valaddr = value_contents_for_printing (val);
|
||
enum bfd_endian byte_order = type_byte_order (regtype);
|
||
|
||
get_user_print_options (&opts);
|
||
opts.deref_ref = 1;
|
||
|
||
common_val_print (val, &format_stream, 0, &opts, current_language);
|
||
|
||
if (print_raw_format)
|
||
{
|
||
pad_to_column (format_stream, value_column_2);
|
||
format_stream.puts ("(raw ");
|
||
print_hex_chars (&format_stream, valaddr, TYPE_LENGTH (regtype),
|
||
byte_order, true);
|
||
format_stream.putc (')');
|
||
}
|
||
}
|
||
else
|
||
{
|
||
struct value_print_options opts;
|
||
|
||
/* Print the register in hex. */
|
||
get_formatted_print_options (&opts, 'x');
|
||
opts.deref_ref = 1;
|
||
common_val_print (val, &format_stream, 0, &opts, current_language);
|
||
/* If not a vector register, print it also according to its
|
||
natural format. */
|
||
if (print_raw_format && TYPE_VECTOR (regtype) == 0)
|
||
{
|
||
pad_to_column (format_stream, value_column_2);
|
||
get_user_print_options (&opts);
|
||
opts.deref_ref = 1;
|
||
common_val_print (val, &format_stream, 0, &opts, current_language);
|
||
}
|
||
}
|
||
|
||
fputs_filtered (format_stream.c_str (), file);
|
||
fprintf_filtered (file, "\n");
|
||
}
|
||
|
||
/* Print out the machine register regnum. If regnum is -1, print all
|
||
registers (print_all == 1) or all non-float and non-vector
|
||
registers (print_all == 0).
|
||
|
||
For most machines, having all_registers_info() print the
|
||
register(s) one per line is good enough. If a different format is
|
||
required, (eg, for MIPS or Pyramid 90x, which both have lots of
|
||
regs), or there is an existing convention for showing all the
|
||
registers, define the architecture method PRINT_REGISTERS_INFO to
|
||
provide that format. */
|
||
|
||
void
|
||
default_print_registers_info (struct gdbarch *gdbarch,
|
||
struct ui_file *file,
|
||
struct frame_info *frame,
|
||
int regnum, int print_all)
|
||
{
|
||
int i;
|
||
const int numregs = gdbarch_num_cooked_regs (gdbarch);
|
||
|
||
for (i = 0; i < numregs; i++)
|
||
{
|
||
/* Decide between printing all regs, non-float / vector regs, or
|
||
specific reg. */
|
||
if (regnum == -1)
|
||
{
|
||
if (print_all)
|
||
{
|
||
if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup))
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup))
|
||
continue;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (i != regnum)
|
||
continue;
|
||
}
|
||
|
||
/* If the register name is empty, it is undefined for this
|
||
processor, so don't display anything. */
|
||
if (gdbarch_register_name (gdbarch, i) == NULL
|
||
|| *(gdbarch_register_name (gdbarch, i)) == '\0')
|
||
continue;
|
||
|
||
default_print_one_register_info (file,
|
||
gdbarch_register_name (gdbarch, i),
|
||
value_of_register (i, frame));
|
||
}
|
||
}
|
||
|
||
void
|
||
registers_info (const char *addr_exp, int fpregs)
|
||
{
|
||
struct frame_info *frame;
|
||
struct gdbarch *gdbarch;
|
||
|
||
if (!target_has_registers)
|
||
error (_("The program has no registers now."));
|
||
frame = get_selected_frame (NULL);
|
||
gdbarch = get_frame_arch (frame);
|
||
|
||
if (!addr_exp)
|
||
{
|
||
gdbarch_print_registers_info (gdbarch, gdb_stdout,
|
||
frame, -1, fpregs);
|
||
return;
|
||
}
|
||
|
||
while (*addr_exp != '\0')
|
||
{
|
||
const char *start;
|
||
const char *end;
|
||
|
||
/* Skip leading white space. */
|
||
addr_exp = skip_spaces (addr_exp);
|
||
|
||
/* Discard any leading ``$''. Check that there is something
|
||
resembling a register following it. */
|
||
if (addr_exp[0] == '$')
|
||
addr_exp++;
|
||
if (isspace ((*addr_exp)) || (*addr_exp) == '\0')
|
||
error (_("Missing register name"));
|
||
|
||
/* Find the start/end of this register name/num/group. */
|
||
start = addr_exp;
|
||
while ((*addr_exp) != '\0' && !isspace ((*addr_exp)))
|
||
addr_exp++;
|
||
end = addr_exp;
|
||
|
||
/* Figure out what we've found and display it. */
|
||
|
||
/* A register name? */
|
||
{
|
||
int regnum = user_reg_map_name_to_regnum (gdbarch, start, end - start);
|
||
|
||
if (regnum >= 0)
|
||
{
|
||
/* User registers lie completely outside of the range of
|
||
normal registers. Catch them early so that the target
|
||
never sees them. */
|
||
if (regnum >= gdbarch_num_cooked_regs (gdbarch))
|
||
{
|
||
struct value *regval = value_of_user_reg (regnum, frame);
|
||
const char *regname = user_reg_map_regnum_to_name (gdbarch,
|
||
regnum);
|
||
|
||
/* Print in the same fashion
|
||
gdbarch_print_registers_info's default
|
||
implementation prints. */
|
||
default_print_one_register_info (gdb_stdout,
|
||
regname,
|
||
regval);
|
||
}
|
||
else
|
||
gdbarch_print_registers_info (gdbarch, gdb_stdout,
|
||
frame, regnum, fpregs);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
/* A register group? */
|
||
{
|
||
struct reggroup *group;
|
||
|
||
for (group = reggroup_next (gdbarch, NULL);
|
||
group != NULL;
|
||
group = reggroup_next (gdbarch, group))
|
||
{
|
||
/* Don't bother with a length check. Should the user
|
||
enter a short register group name, go with the first
|
||
group that matches. */
|
||
if (strncmp (start, reggroup_name (group), end - start) == 0)
|
||
break;
|
||
}
|
||
if (group != NULL)
|
||
{
|
||
int regnum;
|
||
|
||
for (regnum = 0;
|
||
regnum < gdbarch_num_cooked_regs (gdbarch);
|
||
regnum++)
|
||
{
|
||
if (gdbarch_register_reggroup_p (gdbarch, regnum, group))
|
||
gdbarch_print_registers_info (gdbarch,
|
||
gdb_stdout, frame,
|
||
regnum, fpregs);
|
||
}
|
||
continue;
|
||
}
|
||
}
|
||
|
||
/* Nothing matched. */
|
||
error (_("Invalid register `%.*s'"), (int) (end - start), start);
|
||
}
|
||
}
|
||
|
||
static void
|
||
info_all_registers_command (const char *addr_exp, int from_tty)
|
||
{
|
||
registers_info (addr_exp, 1);
|
||
}
|
||
|
||
static void
|
||
info_registers_command (const char *addr_exp, int from_tty)
|
||
{
|
||
registers_info (addr_exp, 0);
|
||
}
|
||
|
||
static void
|
||
print_vector_info (struct ui_file *file,
|
||
struct frame_info *frame, const char *args)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
|
||
if (gdbarch_print_vector_info_p (gdbarch))
|
||
gdbarch_print_vector_info (gdbarch, file, frame, args);
|
||
else
|
||
{
|
||
int regnum;
|
||
int printed_something = 0;
|
||
|
||
for (regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++)
|
||
{
|
||
if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup))
|
||
{
|
||
printed_something = 1;
|
||
gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
|
||
}
|
||
}
|
||
if (!printed_something)
|
||
fprintf_filtered (file, "No vector information\n");
|
||
}
|
||
}
|
||
|
||
static void
|
||
info_vector_command (const char *args, int from_tty)
|
||
{
|
||
if (!target_has_registers)
|
||
error (_("The program has no registers now."));
|
||
|
||
print_vector_info (gdb_stdout, get_selected_frame (NULL), args);
|
||
}
|
||
|
||
/* Kill the inferior process. Make us have no inferior. */
|
||
|
||
static void
|
||
kill_command (const char *arg, int from_tty)
|
||
{
|
||
/* FIXME: This should not really be inferior_ptid (or target_has_execution).
|
||
It should be a distinct flag that indicates that a target is active, cuz
|
||
some targets don't have processes! */
|
||
|
||
if (inferior_ptid == null_ptid)
|
||
error (_("The program is not being run."));
|
||
if (!query (_("Kill the program being debugged? ")))
|
||
error (_("Not confirmed."));
|
||
|
||
int pid = current_inferior ()->pid;
|
||
/* Save the pid as a string before killing the inferior, since that
|
||
may unpush the current target, and we need the string after. */
|
||
std::string pid_str = target_pid_to_str (ptid_t (pid));
|
||
int infnum = current_inferior ()->num;
|
||
|
||
target_kill ();
|
||
|
||
if (print_inferior_events)
|
||
printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
|
||
infnum, pid_str.c_str ());
|
||
|
||
bfd_cache_close_all ();
|
||
}
|
||
|
||
/* Used in `attach&' command. Proceed threads of inferior INF iff
|
||
they stopped due to debugger request, and when they did, they
|
||
reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
|
||
have been explicitly been told to stop. */
|
||
|
||
static void
|
||
proceed_after_attach (inferior *inf)
|
||
{
|
||
/* Don't error out if the current thread is running, because
|
||
there may be other stopped threads. */
|
||
|
||
/* Backup current thread and selected frame. */
|
||
scoped_restore_current_thread restore_thread;
|
||
|
||
for (thread_info *thread : inf->non_exited_threads ())
|
||
if (!thread->executing
|
||
&& !thread->stop_requested
|
||
&& thread->suspend.stop_signal == GDB_SIGNAL_0)
|
||
{
|
||
switch_to_thread (thread);
|
||
clear_proceed_status (0);
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
}
|
||
}
|
||
|
||
/* See inferior.h. */
|
||
|
||
void
|
||
setup_inferior (int from_tty)
|
||
{
|
||
struct inferior *inferior;
|
||
|
||
inferior = current_inferior ();
|
||
inferior->needs_setup = 0;
|
||
|
||
/* If no exec file is yet known, try to determine it from the
|
||
process itself. */
|
||
if (get_exec_file (0) == NULL)
|
||
exec_file_locate_attach (inferior_ptid.pid (), 1, from_tty);
|
||
else
|
||
{
|
||
reopen_exec_file ();
|
||
reread_symbols ();
|
||
}
|
||
|
||
/* Take any necessary post-attaching actions for this platform. */
|
||
target_post_attach (inferior_ptid.pid ());
|
||
|
||
post_create_inferior (current_top_target (), from_tty);
|
||
}
|
||
|
||
/* What to do after the first program stops after attaching. */
|
||
enum attach_post_wait_mode
|
||
{
|
||
/* Do nothing. Leaves threads as they are. */
|
||
ATTACH_POST_WAIT_NOTHING,
|
||
|
||
/* Re-resume threads that are marked running. */
|
||
ATTACH_POST_WAIT_RESUME,
|
||
|
||
/* Stop all threads. */
|
||
ATTACH_POST_WAIT_STOP,
|
||
};
|
||
|
||
/* Called after we've attached to a process and we've seen it stop for
|
||
the first time. If ASYNC_EXEC is true, re-resume threads that
|
||
should be running. Else if ATTACH, */
|
||
|
||
static void
|
||
attach_post_wait (const char *args, int from_tty, enum attach_post_wait_mode mode)
|
||
{
|
||
struct inferior *inferior;
|
||
|
||
inferior = current_inferior ();
|
||
inferior->control.stop_soon = NO_STOP_QUIETLY;
|
||
|
||
if (inferior->needs_setup)
|
||
setup_inferior (from_tty);
|
||
|
||
if (mode == ATTACH_POST_WAIT_RESUME)
|
||
{
|
||
/* The user requested an `attach&', so be sure to leave threads
|
||
that didn't get a signal running. */
|
||
|
||
/* Immediatelly resume all suspended threads of this inferior,
|
||
and this inferior only. This should have no effect on
|
||
already running threads. If a thread has been stopped with a
|
||
signal, leave it be. */
|
||
if (non_stop)
|
||
proceed_after_attach (inferior);
|
||
else
|
||
{
|
||
if (inferior_thread ()->suspend.stop_signal == GDB_SIGNAL_0)
|
||
{
|
||
clear_proceed_status (0);
|
||
proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
|
||
}
|
||
}
|
||
}
|
||
else if (mode == ATTACH_POST_WAIT_STOP)
|
||
{
|
||
/* The user requested a plain `attach', so be sure to leave
|
||
the inferior stopped. */
|
||
|
||
/* At least the current thread is already stopped. */
|
||
|
||
/* In all-stop, by definition, all threads have to be already
|
||
stopped at this point. In non-stop, however, although the
|
||
selected thread is stopped, others may still be executing.
|
||
Be sure to explicitly stop all threads of the process. This
|
||
should have no effect on already stopped threads. */
|
||
if (non_stop)
|
||
target_stop (ptid_t (inferior->pid));
|
||
else if (target_is_non_stop_p ())
|
||
{
|
||
struct thread_info *lowest = inferior_thread ();
|
||
|
||
stop_all_threads ();
|
||
|
||
/* It's not defined which thread will report the attach
|
||
stop. For consistency, always select the thread with
|
||
lowest GDB number, which should be the main thread, if it
|
||
still exists. */
|
||
for (thread_info *thread : current_inferior ()->non_exited_threads ())
|
||
if (thread->inf->num < lowest->inf->num
|
||
|| thread->per_inf_num < lowest->per_inf_num)
|
||
lowest = thread;
|
||
|
||
switch_to_thread (lowest);
|
||
}
|
||
|
||
/* Tell the user/frontend where we're stopped. */
|
||
normal_stop ();
|
||
if (deprecated_attach_hook)
|
||
deprecated_attach_hook ();
|
||
}
|
||
}
|
||
|
||
struct attach_command_continuation_args
|
||
{
|
||
char *args;
|
||
int from_tty;
|
||
enum attach_post_wait_mode mode;
|
||
};
|
||
|
||
static void
|
||
attach_command_continuation (void *args, int err)
|
||
{
|
||
struct attach_command_continuation_args *a
|
||
= (struct attach_command_continuation_args *) args;
|
||
|
||
if (err)
|
||
return;
|
||
|
||
attach_post_wait (a->args, a->from_tty, a->mode);
|
||
}
|
||
|
||
static void
|
||
attach_command_continuation_free_args (void *args)
|
||
{
|
||
struct attach_command_continuation_args *a
|
||
= (struct attach_command_continuation_args *) args;
|
||
|
||
xfree (a->args);
|
||
xfree (a);
|
||
}
|
||
|
||
/* "attach" command entry point. Takes a program started up outside
|
||
of gdb and ``attaches'' to it. This stops it cold in its tracks
|
||
and allows us to start debugging it. */
|
||
|
||
void
|
||
attach_command (const char *args, int from_tty)
|
||
{
|
||
int async_exec;
|
||
struct target_ops *attach_target;
|
||
struct inferior *inferior = current_inferior ();
|
||
enum attach_post_wait_mode mode;
|
||
|
||
dont_repeat (); /* Not for the faint of heart */
|
||
|
||
if (gdbarch_has_global_solist (target_gdbarch ()))
|
||
/* Don't complain if all processes share the same symbol
|
||
space. */
|
||
;
|
||
else if (target_has_execution)
|
||
{
|
||
if (query (_("A program is being debugged already. Kill it? ")))
|
||
target_kill ();
|
||
else
|
||
error (_("Not killed."));
|
||
}
|
||
|
||
/* Clean up any leftovers from other runs. Some other things from
|
||
this function should probably be moved into target_pre_inferior. */
|
||
target_pre_inferior (from_tty);
|
||
|
||
gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
|
||
args = stripped.get ();
|
||
|
||
attach_target = find_attach_target ();
|
||
|
||
prepare_execution_command (attach_target, async_exec);
|
||
|
||
if (non_stop && !attach_target->supports_non_stop ())
|
||
error (_("Cannot attach to this target in non-stop mode"));
|
||
|
||
attach_target->attach (args, from_tty);
|
||
/* to_attach should push the target, so after this point we
|
||
shouldn't refer to attach_target again. */
|
||
attach_target = NULL;
|
||
|
||
/* Set up the "saved terminal modes" of the inferior
|
||
based on what modes we are starting it with. */
|
||
target_terminal::init ();
|
||
|
||
/* Install inferior's terminal modes. This may look like a no-op,
|
||
as we've just saved them above, however, this does more than
|
||
restore terminal settings:
|
||
|
||
- installs a SIGINT handler that forwards SIGINT to the inferior.
|
||
Otherwise a Ctrl-C pressed just while waiting for the initial
|
||
stop would end up as a spurious Quit.
|
||
|
||
- removes stdin from the event loop, which we need if attaching
|
||
in the foreground, otherwise on targets that report an initial
|
||
stop on attach (which are most) we'd process input/commands
|
||
while we're in the event loop waiting for that stop. That is,
|
||
before the attach continuation runs and the command is really
|
||
finished. */
|
||
target_terminal::inferior ();
|
||
|
||
/* Set up execution context to know that we should return from
|
||
wait_for_inferior as soon as the target reports a stop. */
|
||
init_wait_for_inferior ();
|
||
clear_proceed_status (0);
|
||
|
||
inferior->needs_setup = 1;
|
||
|
||
if (target_is_non_stop_p ())
|
||
{
|
||
/* If we find that the current thread isn't stopped, explicitly
|
||
do so now, because we're going to install breakpoints and
|
||
poke at memory. */
|
||
|
||
if (async_exec)
|
||
/* The user requested an `attach&'; stop just one thread. */
|
||
target_stop (inferior_ptid);
|
||
else
|
||
/* The user requested an `attach', so stop all threads of this
|
||
inferior. */
|
||
target_stop (ptid_t (inferior_ptid.pid ()));
|
||
}
|
||
|
||
/* Check for exec file mismatch, and let the user solve it. */
|
||
validate_exec_file (from_tty);
|
||
|
||
mode = async_exec ? ATTACH_POST_WAIT_RESUME : ATTACH_POST_WAIT_STOP;
|
||
|
||
/* Some system don't generate traps when attaching to inferior.
|
||
E.g. Mach 3 or GNU hurd. */
|
||
if (!target_attach_no_wait ())
|
||
{
|
||
struct attach_command_continuation_args *a;
|
||
|
||
/* Careful here. See comments in inferior.h. Basically some
|
||
OSes don't ignore SIGSTOPs on continue requests anymore. We
|
||
need a way for handle_inferior_event to reset the stop_signal
|
||
variable after an attach, and this is what
|
||
STOP_QUIETLY_NO_SIGSTOP is for. */
|
||
inferior->control.stop_soon = STOP_QUIETLY_NO_SIGSTOP;
|
||
|
||
/* Wait for stop. */
|
||
a = XNEW (struct attach_command_continuation_args);
|
||
a->args = xstrdup (args);
|
||
a->from_tty = from_tty;
|
||
a->mode = mode;
|
||
add_inferior_continuation (attach_command_continuation, a,
|
||
attach_command_continuation_free_args);
|
||
|
||
/* Let infrun consider waiting for events out of this
|
||
target. */
|
||
inferior->process_target ()->threads_executing = true;
|
||
|
||
if (!target_is_async_p ())
|
||
mark_infrun_async_event_handler ();
|
||
return;
|
||
}
|
||
else
|
||
attach_post_wait (args, from_tty, mode);
|
||
}
|
||
|
||
/* We had just found out that the target was already attached to an
|
||
inferior. PTID points at a thread of this new inferior, that is
|
||
the most likely to be stopped right now, but not necessarily so.
|
||
The new inferior is assumed to be already added to the inferior
|
||
list at this point. If LEAVE_RUNNING, then leave the threads of
|
||
this inferior running, except those we've explicitly seen reported
|
||
as stopped. */
|
||
|
||
void
|
||
notice_new_inferior (thread_info *thr, int leave_running, int from_tty)
|
||
{
|
||
enum attach_post_wait_mode mode
|
||
= leave_running ? ATTACH_POST_WAIT_RESUME : ATTACH_POST_WAIT_NOTHING;
|
||
|
||
gdb::optional<scoped_restore_current_thread> restore_thread;
|
||
|
||
if (inferior_ptid != null_ptid)
|
||
restore_thread.emplace ();
|
||
|
||
/* Avoid reading registers -- we haven't fetched the target
|
||
description yet. */
|
||
switch_to_thread_no_regs (thr);
|
||
|
||
/* When we "notice" a new inferior we need to do all the things we
|
||
would normally do if we had just attached to it. */
|
||
|
||
if (thr->executing)
|
||
{
|
||
struct attach_command_continuation_args *a;
|
||
struct inferior *inferior = current_inferior ();
|
||
|
||
/* We're going to install breakpoints, and poke at memory,
|
||
ensure that the inferior is stopped for a moment while we do
|
||
that. */
|
||
target_stop (inferior_ptid);
|
||
|
||
inferior->control.stop_soon = STOP_QUIETLY_REMOTE;
|
||
|
||
/* Wait for stop before proceeding. */
|
||
a = XNEW (struct attach_command_continuation_args);
|
||
a->args = xstrdup ("");
|
||
a->from_tty = from_tty;
|
||
a->mode = mode;
|
||
add_inferior_continuation (attach_command_continuation, a,
|
||
attach_command_continuation_free_args);
|
||
|
||
return;
|
||
}
|
||
|
||
attach_post_wait ("" /* args */, from_tty, mode);
|
||
}
|
||
|
||
/*
|
||
* detach_command --
|
||
* takes a program previously attached to and detaches it.
|
||
* The program resumes execution and will no longer stop
|
||
* on signals, etc. We better not have left any breakpoints
|
||
* in the program or it'll die when it hits one. For this
|
||
* to work, it may be necessary for the process to have been
|
||
* previously attached. It *might* work if the program was
|
||
* started via the normal ptrace (PTRACE_TRACEME).
|
||
*/
|
||
|
||
void
|
||
detach_command (const char *args, int from_tty)
|
||
{
|
||
dont_repeat (); /* Not for the faint of heart. */
|
||
|
||
if (inferior_ptid == null_ptid)
|
||
error (_("The program is not being run."));
|
||
|
||
query_if_trace_running (from_tty);
|
||
|
||
disconnect_tracing ();
|
||
|
||
target_detach (current_inferior (), from_tty);
|
||
|
||
/* The current inferior process was just detached successfully. Get
|
||
rid of breakpoints that no longer make sense. Note we don't do
|
||
this within target_detach because that is also used when
|
||
following child forks, and in that case we will want to transfer
|
||
breakpoints to the child, not delete them. */
|
||
breakpoint_init_inferior (inf_exited);
|
||
|
||
/* If the solist is global across inferiors, don't clear it when we
|
||
detach from a single inferior. */
|
||
if (!gdbarch_has_global_solist (target_gdbarch ()))
|
||
no_shared_libraries (NULL, from_tty);
|
||
|
||
if (deprecated_detach_hook)
|
||
deprecated_detach_hook ();
|
||
}
|
||
|
||
/* Disconnect from the current target without resuming it (leaving it
|
||
waiting for a debugger).
|
||
|
||
We'd better not have left any breakpoints in the program or the
|
||
next debugger will get confused. Currently only supported for some
|
||
remote targets, since the normal attach mechanisms don't work on
|
||
stopped processes on some native platforms (e.g. GNU/Linux). */
|
||
|
||
static void
|
||
disconnect_command (const char *args, int from_tty)
|
||
{
|
||
dont_repeat (); /* Not for the faint of heart. */
|
||
query_if_trace_running (from_tty);
|
||
disconnect_tracing ();
|
||
target_disconnect (args, from_tty);
|
||
no_shared_libraries (NULL, from_tty);
|
||
init_thread_list ();
|
||
if (deprecated_detach_hook)
|
||
deprecated_detach_hook ();
|
||
}
|
||
|
||
/* Stop PTID in the current target, and tag the PTID threads as having
|
||
been explicitly requested to stop. PTID can be a thread, a
|
||
process, or minus_one_ptid, meaning all threads of all inferiors of
|
||
the current target. */
|
||
|
||
static void
|
||
stop_current_target_threads_ns (ptid_t ptid)
|
||
{
|
||
target_stop (ptid);
|
||
|
||
/* Tag the thread as having been explicitly requested to stop, so
|
||
other parts of gdb know not to resume this thread automatically,
|
||
if it was stopped due to an internal event. Limit this to
|
||
non-stop mode, as when debugging a multi-threaded application in
|
||
all-stop mode, we will only get one stop event --- it's undefined
|
||
which thread will report the event. */
|
||
set_stop_requested (current_inferior ()->process_target (),
|
||
ptid, 1);
|
||
}
|
||
|
||
/* See inferior.h. */
|
||
|
||
void
|
||
interrupt_target_1 (bool all_threads)
|
||
{
|
||
if (non_stop)
|
||
{
|
||
if (all_threads)
|
||
{
|
||
scoped_restore_current_thread restore_thread;
|
||
|
||
for (inferior *inf : all_inferiors ())
|
||
{
|
||
switch_to_inferior_no_thread (inf);
|
||
stop_current_target_threads_ns (minus_one_ptid);
|
||
}
|
||
}
|
||
else
|
||
stop_current_target_threads_ns (inferior_ptid);
|
||
}
|
||
else
|
||
target_interrupt ();
|
||
}
|
||
|
||
/* interrupt [-a]
|
||
Stop the execution of the target while running in async mode, in
|
||
the background. In all-stop, stop the whole process. In non-stop
|
||
mode, stop the current thread only by default, or stop all threads
|
||
if the `-a' switch is used. */
|
||
|
||
static void
|
||
interrupt_command (const char *args, int from_tty)
|
||
{
|
||
if (target_can_async_p ())
|
||
{
|
||
int all_threads = 0;
|
||
|
||
dont_repeat (); /* Not for the faint of heart. */
|
||
|
||
if (args != NULL
|
||
&& startswith (args, "-a"))
|
||
all_threads = 1;
|
||
|
||
if (!non_stop && all_threads)
|
||
error (_("-a is meaningless in all-stop mode."));
|
||
|
||
interrupt_target_1 (all_threads);
|
||
}
|
||
}
|
||
|
||
/* See inferior.h. */
|
||
|
||
void
|
||
default_print_float_info (struct gdbarch *gdbarch, struct ui_file *file,
|
||
struct frame_info *frame, const char *args)
|
||
{
|
||
int regnum;
|
||
int printed_something = 0;
|
||
|
||
for (regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++)
|
||
{
|
||
if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup))
|
||
{
|
||
printed_something = 1;
|
||
gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
|
||
}
|
||
}
|
||
if (!printed_something)
|
||
fprintf_filtered (file, "No floating-point info "
|
||
"available for this processor.\n");
|
||
}
|
||
|
||
static void
|
||
info_float_command (const char *args, int from_tty)
|
||
{
|
||
struct frame_info *frame;
|
||
|
||
if (!target_has_registers)
|
||
error (_("The program has no registers now."));
|
||
|
||
frame = get_selected_frame (NULL);
|
||
gdbarch_print_float_info (get_frame_arch (frame), gdb_stdout, frame, args);
|
||
}
|
||
|
||
static void
|
||
unset_command (const char *args, int from_tty)
|
||
{
|
||
printf_filtered (_("\"unset\" must be followed by the "
|
||
"name of an unset subcommand.\n"));
|
||
help_list (unsetlist, "unset ", all_commands, gdb_stdout);
|
||
}
|
||
|
||
/* Implement `info proc' family of commands. */
|
||
|
||
static void
|
||
info_proc_cmd_1 (const char *args, enum info_proc_what what, int from_tty)
|
||
{
|
||
struct gdbarch *gdbarch = get_current_arch ();
|
||
|
||
if (!target_info_proc (args, what))
|
||
{
|
||
if (gdbarch_info_proc_p (gdbarch))
|
||
gdbarch_info_proc (gdbarch, args, what);
|
||
else
|
||
error (_("Not supported on this target."));
|
||
}
|
||
}
|
||
|
||
/* Implement `info proc' when given without any further parameters. */
|
||
|
||
static void
|
||
info_proc_cmd (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_MINIMAL, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc mappings'. */
|
||
|
||
static void
|
||
info_proc_cmd_mappings (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_MAPPINGS, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc stat'. */
|
||
|
||
static void
|
||
info_proc_cmd_stat (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_STAT, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc status'. */
|
||
|
||
static void
|
||
info_proc_cmd_status (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_STATUS, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc cwd'. */
|
||
|
||
static void
|
||
info_proc_cmd_cwd (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_CWD, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc cmdline'. */
|
||
|
||
static void
|
||
info_proc_cmd_cmdline (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_CMDLINE, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc exe'. */
|
||
|
||
static void
|
||
info_proc_cmd_exe (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_EXE, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc files'. */
|
||
|
||
static void
|
||
info_proc_cmd_files (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_FILES, from_tty);
|
||
}
|
||
|
||
/* Implement `info proc all'. */
|
||
|
||
static void
|
||
info_proc_cmd_all (const char *args, int from_tty)
|
||
{
|
||
info_proc_cmd_1 (args, IP_ALL, from_tty);
|
||
}
|
||
|
||
/* Implement `show print finish'. */
|
||
|
||
static void
|
||
show_print_finish (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c,
|
||
const char *value)
|
||
{
|
||
fprintf_filtered (file, _("\
|
||
Printing of return value after `finish' is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
|
||
/* This help string is used for the run, start, and starti commands.
|
||
It is defined as a macro to prevent duplication. */
|
||
|
||
#define RUN_ARGS_HELP \
|
||
"You may specify arguments to give it.\n\
|
||
Args may include \"*\", or \"[...]\"; they are expanded using the\n\
|
||
shell that will start the program (specified by the \"$SHELL\" environment\n\
|
||
variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
|
||
are also allowed.\n\
|
||
\n\
|
||
With no arguments, uses arguments last specified (with \"run\" or \n\
|
||
\"set args\"). To cancel previous arguments and run with no arguments,\n\
|
||
use \"set args\" without arguments.\n\
|
||
\n\
|
||
To start the inferior without using a shell, use \"set startup-with-shell off\"."
|
||
|
||
void _initialize_infcmd ();
|
||
void
|
||
_initialize_infcmd ()
|
||
{
|
||
static struct cmd_list_element *info_proc_cmdlist;
|
||
struct cmd_list_element *c = NULL;
|
||
const char *cmd_name;
|
||
|
||
/* Add the filename of the terminal connected to inferior I/O. */
|
||
add_setshow_optional_filename_cmd ("inferior-tty", class_run,
|
||
&inferior_io_terminal_scratch, _("\
|
||
Set terminal for future runs of program being debugged."), _("\
|
||
Show terminal for future runs of program being debugged."), _("\
|
||
Usage: set inferior-tty [TTY]\n\n\
|
||
If TTY is omitted, the default behavior of using the same terminal as GDB\n\
|
||
is restored."),
|
||
set_inferior_tty_command,
|
||
show_inferior_tty_command,
|
||
&setlist, &showlist);
|
||
cmd_name = "inferior-tty";
|
||
c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
|
||
gdb_assert (c != NULL);
|
||
add_alias_cmd ("tty", c, class_alias, 0, &cmdlist);
|
||
|
||
cmd_name = "args";
|
||
add_setshow_string_noescape_cmd (cmd_name, class_run,
|
||
&inferior_args_scratch, _("\
|
||
Set argument list to give program being debugged when it is started."), _("\
|
||
Show argument list to give program being debugged when it is started."), _("\
|
||
Follow this command with any number of args, to be passed to the program."),
|
||
set_args_command,
|
||
show_args_command,
|
||
&setlist, &showlist);
|
||
c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
|
||
gdb_assert (c != NULL);
|
||
set_cmd_completer (c, filename_completer);
|
||
|
||
cmd_name = "cwd";
|
||
add_setshow_string_noescape_cmd (cmd_name, class_run,
|
||
&inferior_cwd_scratch, _("\
|
||
Set the current working directory to be used when the inferior is started.\n\
|
||
Changing this setting does not have any effect on inferiors that are\n\
|
||
already running."),
|
||
_("\
|
||
Show the current working directory that is used when the inferior is started."),
|
||
_("\
|
||
Use this command to change the current working directory that will be used\n\
|
||
when the inferior is started. This setting does not affect GDB's current\n\
|
||
working directory."),
|
||
set_cwd_command,
|
||
show_cwd_command,
|
||
&setlist, &showlist);
|
||
c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
|
||
gdb_assert (c != NULL);
|
||
set_cmd_completer (c, filename_completer);
|
||
|
||
c = add_cmd ("environment", no_class, environment_info, _("\
|
||
The environment to give the program, or one variable's value.\n\
|
||
With an argument VAR, prints the value of environment variable VAR to\n\
|
||
give the program being debugged. With no arguments, prints the entire\n\
|
||
environment to be given to the program."), &showlist);
|
||
set_cmd_completer (c, noop_completer);
|
||
|
||
add_prefix_cmd ("unset", no_class, unset_command,
|
||
_("Complement to certain \"set\" commands."),
|
||
&unsetlist, "unset ", 0, &cmdlist);
|
||
|
||
c = add_cmd ("environment", class_run, unset_environment_command, _("\
|
||
Cancel environment variable VAR for the program.\n\
|
||
This does not affect the program until the next \"run\" command."),
|
||
&unsetlist);
|
||
set_cmd_completer (c, noop_completer);
|
||
|
||
c = add_cmd ("environment", class_run, set_environment_command, _("\
|
||
Set environment variable value to give the program.\n\
|
||
Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
|
||
VALUES of environment variables are uninterpreted strings.\n\
|
||
This does not affect the program until the next \"run\" command."),
|
||
&setlist);
|
||
set_cmd_completer (c, noop_completer);
|
||
|
||
c = add_com ("path", class_files, path_command, _("\
|
||
Add directory DIR(s) to beginning of search path for object files.\n\
|
||
$cwd in the path means the current working directory.\n\
|
||
This path is equivalent to the $PATH shell variable. It is a list of\n\
|
||
directories, separated by colons. These directories are searched to find\n\
|
||
fully linked executable files and separately compiled object files as \
|
||
needed."));
|
||
set_cmd_completer (c, filename_completer);
|
||
|
||
c = add_cmd ("paths", no_class, path_info, _("\
|
||
Current search path for finding object files.\n\
|
||
$cwd in the path means the current working directory.\n\
|
||
This path is equivalent to the $PATH shell variable. It is a list of\n\
|
||
directories, separated by colons. These directories are searched to find\n\
|
||
fully linked executable files and separately compiled object files as \
|
||
needed."),
|
||
&showlist);
|
||
set_cmd_completer (c, noop_completer);
|
||
|
||
add_prefix_cmd ("kill", class_run, kill_command,
|
||
_("Kill execution of program being debugged."),
|
||
&killlist, "kill ", 0, &cmdlist);
|
||
|
||
add_com ("attach", class_run, attach_command, _("\
|
||
Attach to a process or file outside of GDB.\n\
|
||
This command attaches to another target, of the same type as your last\n\
|
||
\"target\" command (\"info files\" will show your target stack).\n\
|
||
The command may take as argument a process id or a device file.\n\
|
||
For a process id, you must have permission to send the process a signal,\n\
|
||
and it must have the same effective uid as the debugger.\n\
|
||
When using \"attach\" with a process id, the debugger finds the\n\
|
||
program running in the process, looking first in the current working\n\
|
||
directory, or (if not found there) using the source file search path\n\
|
||
(see the \"directory\" command). You can also use the \"file\" command\n\
|
||
to specify the program, and to load its symbol table."));
|
||
|
||
add_prefix_cmd ("detach", class_run, detach_command, _("\
|
||
Detach a process or file previously attached.\n\
|
||
If a process, it is no longer traced, and it continues its execution. If\n\
|
||
you were debugging a file, the file is closed and gdb no longer accesses it."),
|
||
&detachlist, "detach ", 0, &cmdlist);
|
||
|
||
add_com ("disconnect", class_run, disconnect_command, _("\
|
||
Disconnect from a target.\n\
|
||
The target will wait for another debugger to connect. Not available for\n\
|
||
all targets."));
|
||
|
||
c = add_com ("signal", class_run, signal_command, _("\
|
||
Continue program with the specified signal.\n\
|
||
Usage: signal SIGNAL\n\
|
||
The SIGNAL argument is processed the same as the handle command.\n\
|
||
\n\
|
||
An argument of \"0\" means continue the program without sending it a signal.\n\
|
||
This is useful in cases where the program stopped because of a signal,\n\
|
||
and you want to resume the program while discarding the signal.\n\
|
||
\n\
|
||
In a multi-threaded program the signal is delivered to, or discarded from,\n\
|
||
the current thread only."));
|
||
set_cmd_completer (c, signal_completer);
|
||
|
||
c = add_com ("queue-signal", class_run, queue_signal_command, _("\
|
||
Queue a signal to be delivered to the current thread when it is resumed.\n\
|
||
Usage: queue-signal SIGNAL\n\
|
||
The SIGNAL argument is processed the same as the handle command.\n\
|
||
It is an error if the handling state of SIGNAL is \"nopass\".\n\
|
||
\n\
|
||
An argument of \"0\" means remove any currently queued signal from\n\
|
||
the current thread. This is useful in cases where the program stopped\n\
|
||
because of a signal, and you want to resume it while discarding the signal.\n\
|
||
\n\
|
||
In a multi-threaded program the signal is queued with, or discarded from,\n\
|
||
the current thread only."));
|
||
set_cmd_completer (c, signal_completer);
|
||
|
||
add_com ("stepi", class_run, stepi_command, _("\
|
||
Step one instruction exactly.\n\
|
||
Usage: stepi [N]\n\
|
||
Argument N means step N times (or till program stops for another \
|
||
reason)."));
|
||
add_com_alias ("si", "stepi", class_alias, 0);
|
||
|
||
add_com ("nexti", class_run, nexti_command, _("\
|
||
Step one instruction, but proceed through subroutine calls.\n\
|
||
Usage: nexti [N]\n\
|
||
Argument N means step N times (or till program stops for another \
|
||
reason)."));
|
||
add_com_alias ("ni", "nexti", class_alias, 0);
|
||
|
||
add_com ("finish", class_run, finish_command, _("\
|
||
Execute until selected stack frame returns.\n\
|
||
Usage: finish\n\
|
||
Upon return, the value returned is printed and put in the value history."));
|
||
add_com_alias ("fin", "finish", class_run, 1);
|
||
|
||
add_com ("next", class_run, next_command, _("\
|
||
Step program, proceeding through subroutine calls.\n\
|
||
Usage: next [N]\n\
|
||
Unlike \"step\", if the current source line calls a subroutine,\n\
|
||
this command does not enter the subroutine, but instead steps over\n\
|
||
the call, in effect treating it as a single source line."));
|
||
add_com_alias ("n", "next", class_run, 1);
|
||
|
||
add_com ("step", class_run, step_command, _("\
|
||
Step program until it reaches a different source line.\n\
|
||
Usage: step [N]\n\
|
||
Argument N means step N times (or till program stops for another \
|
||
reason)."));
|
||
add_com_alias ("s", "step", class_run, 1);
|
||
|
||
c = add_com ("until", class_run, until_command, _("\
|
||
Execute until past the current line or past a LOCATION.\n\
|
||
Execute until the program reaches a source line greater than the current\n\
|
||
or a specified location (same args as break command) within the current \
|
||
frame."));
|
||
set_cmd_completer (c, location_completer);
|
||
add_com_alias ("u", "until", class_run, 1);
|
||
|
||
c = add_com ("advance", class_run, advance_command, _("\
|
||
Continue the program up to the given location (same form as args for break \
|
||
command).\n\
|
||
Execution will also stop upon exit from the current stack frame."));
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
c = add_com ("jump", class_run, jump_command, _("\
|
||
Continue program being debugged at specified line or address.\n\
|
||
Usage: jump LOCATION\n\
|
||
Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
|
||
for an address to start at."));
|
||
set_cmd_completer (c, location_completer);
|
||
add_com_alias ("j", "jump", class_run, 1);
|
||
|
||
add_com ("continue", class_run, continue_command, _("\
|
||
Continue program being debugged, after signal or breakpoint.\n\
|
||
Usage: continue [N]\n\
|
||
If proceeding from breakpoint, a number N may be used as an argument,\n\
|
||
which means to set the ignore count of that breakpoint to N - 1 (so that\n\
|
||
the breakpoint won't break until the Nth time it is reached).\n\
|
||
\n\
|
||
If non-stop mode is enabled, continue only the current thread,\n\
|
||
otherwise all the threads in the program are continued. To \n\
|
||
continue all stopped threads in non-stop mode, use the -a option.\n\
|
||
Specifying -a and an ignore count simultaneously is an error."));
|
||
add_com_alias ("c", "cont", class_run, 1);
|
||
add_com_alias ("fg", "cont", class_run, 1);
|
||
|
||
c = add_com ("run", class_run, run_command, _("\
|
||
Start debugged program.\n"
|
||
RUN_ARGS_HELP));
|
||
set_cmd_completer (c, filename_completer);
|
||
add_com_alias ("r", "run", class_run, 1);
|
||
|
||
c = add_com ("start", class_run, start_command, _("\
|
||
Start the debugged program stopping at the beginning of the main procedure.\n"
|
||
RUN_ARGS_HELP));
|
||
set_cmd_completer (c, filename_completer);
|
||
|
||
c = add_com ("starti", class_run, starti_command, _("\
|
||
Start the debugged program stopping at the first instruction.\n"
|
||
RUN_ARGS_HELP));
|
||
set_cmd_completer (c, filename_completer);
|
||
|
||
add_com ("interrupt", class_run, interrupt_command,
|
||
_("Interrupt the execution of the debugged program.\n\
|
||
If non-stop mode is enabled, interrupt only the current thread,\n\
|
||
otherwise all the threads in the program are stopped. To \n\
|
||
interrupt all running threads in non-stop mode, use the -a option."));
|
||
|
||
c = add_info ("registers", info_registers_command, _("\
|
||
List of integer registers and their contents, for selected stack frame.\n\
|
||
One or more register names as argument means describe the given registers.\n\
|
||
One or more register group names as argument means describe the registers\n\
|
||
in the named register groups."));
|
||
add_info_alias ("r", "registers", 1);
|
||
set_cmd_completer (c, reg_or_group_completer);
|
||
|
||
c = add_info ("all-registers", info_all_registers_command, _("\
|
||
List of all registers and their contents, for selected stack frame.\n\
|
||
One or more register names as argument means describe the given registers.\n\
|
||
One or more register group names as argument means describe the registers\n\
|
||
in the named register groups."));
|
||
set_cmd_completer (c, reg_or_group_completer);
|
||
|
||
add_info ("program", info_program_command,
|
||
_("Execution status of the program."));
|
||
|
||
add_info ("float", info_float_command,
|
||
_("Print the status of the floating point unit."));
|
||
|
||
add_info ("vector", info_vector_command,
|
||
_("Print the status of the vector unit."));
|
||
|
||
add_prefix_cmd ("proc", class_info, info_proc_cmd,
|
||
_("\
|
||
Show additional information about a process.\n\
|
||
Specify any process id, or use the program being debugged by default."),
|
||
&info_proc_cmdlist, "info proc ",
|
||
1/*allow-unknown*/, &infolist);
|
||
|
||
add_cmd ("mappings", class_info, info_proc_cmd_mappings, _("\
|
||
List memory regions mapped by the specified process."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_cmd ("stat", class_info, info_proc_cmd_stat, _("\
|
||
List process info from /proc/PID/stat."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_cmd ("status", class_info, info_proc_cmd_status, _("\
|
||
List process info from /proc/PID/status."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_cmd ("cwd", class_info, info_proc_cmd_cwd, _("\
|
||
List current working directory of the specified process."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_cmd ("cmdline", class_info, info_proc_cmd_cmdline, _("\
|
||
List command line arguments of the specified process."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_cmd ("exe", class_info, info_proc_cmd_exe, _("\
|
||
List absolute filename for executable of the specified process."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_cmd ("files", class_info, info_proc_cmd_files, _("\
|
||
List files opened by the specified process."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_cmd ("all", class_info, info_proc_cmd_all, _("\
|
||
List all available info about the specified process."),
|
||
&info_proc_cmdlist);
|
||
|
||
add_setshow_boolean_cmd ("finish", class_support,
|
||
&user_print_options.finish_print, _("\
|
||
Set whether `finish' prints the return value."), _("\
|
||
Show whether `finish' prints the return value."), NULL,
|
||
NULL,
|
||
show_print_finish,
|
||
&setprintlist, &showprintlist);
|
||
}
|