/* Low level interface to ptrace, for GDB when running under Unix.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
-#include "param.h"
#include "frame.h"
#include "inferior.h"
+#include "command.h"
+#include "signals.h"
+#include "terminal.h"
+#include "target.h"
#ifdef USG
#include <sys/types.h>
-#include <fcntl.h>
#endif
-#include <stdio.h>
+/* Some USG-esque systems (some of which are BSD-esque enough so that USG
+ is not defined) want this header, and it won't do any harm. */
+#include <fcntl.h>
+
#include <sys/param.h>
-#include <sys/dir.h>
#include <signal.h>
-#ifdef HAVE_TERMIO
-#include <termio.h>
-#undef TIOCGETP
-#define TIOCGETP TCGETA
-#undef TIOCSETN
-#define TIOCSETN TCSETA
-#undef TIOCSETP
-#define TIOCSETP TCSETAF
-#define TERMINAL struct termio
-#else
-#include <sys/ioctl.h>
-#include <fcntl.h>
-#include <sgtty.h>
-#define TERMINAL struct sgttyb
-#endif
+static void
+kill_command PARAMS ((char *, int));
-#ifdef SET_STACK_LIMIT_HUGE
-#include <sys/time.h>
-#include <sys/resource.h>
-extern int original_stack_limit;
-#endif /* SET_STACK_LIMIT_HUGE */
+static void
+terminal_ours_1 PARAMS ((int));
-extern int errno;
+extern struct target_ops child_ops;
/* Nonzero if we are debugging an attached outside process
rather than an inferior. */
\f
/* Record terminal status separately for debugger and inferior. */
+/* Does GDB have a terminal (on stdin)? */
+int gdb_has_a_terminal;
+#if !defined(__GO32__)
static TERMINAL sg_inferior;
static TERMINAL sg_ours;
-
+#endif
static int tflags_inferior;
static int tflags_ours;
static struct tchars tc_ours;
#endif
-#ifdef TIOCGLTC
+#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
static struct ltchars ltc_inferior;
static struct ltchars ltc_ours;
#endif
#endif
#ifdef TIOCGPGRP
+# ifdef SHORT_PGRP
+static short pgrp_inferior;
+static short pgrp_ours;
+# else /* not def SHORT_PGRP */
static int pgrp_inferior;
static int pgrp_ours;
-#else
-static int (*sigint_ours) ();
-static int (*sigquit_ours) ();
+# endif /* not def SHORT_PGRP */
+#else /* not def TIOCGPGRP */
+static void (*sigint_ours) ();
+static void (*sigquit_ours) ();
#endif /* TIOCGPGRP */
-/* Copy of inferior_io_terminal when inferior was last started. */
-static char *inferior_thisrun_terminal;
+/* The name of the tty (from the `tty' command) that we gave to the inferior
+ when it was last started. */
-static void terminal_ours_1 ();
+static char *inferior_thisrun_terminal;
/* Nonzero if our terminal settings are in effect.
Zero if the inferior's settings are in effect. */
+
static int terminal_is_ours;
+/* Macro for printing errors from ioctl operations */
+
+#define OOPSY(what) \
+ if (result == -1) \
+ fprintf(stderr, "[%s failed in terminal_inferior: %s]\n", \
+ what, strerror (errno))
+
+static void terminal_ours_1 ();
+
/* Initialize the terminal settings we record for the inferior,
before we actually run the inferior. */
void
terminal_init_inferior ()
{
- if (remote_debugging)
- return;
-
+#if !defined(__GO32__)
sg_inferior = sg_ours;
tflags_inferior = tflags_ours;
tc_inferior = tc_ours;
#endif
-#ifdef TIOCGLTC
+#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
ltc_inferior = ltc_ours;
#endif
#ifdef TIOCGPGRP
pgrp_inferior = inferior_pid;
#endif /* TIOCGPGRP */
-
+#endif
terminal_is_ours = 1;
}
void
terminal_inferior ()
{
- if (remote_debugging)
- return;
+#if !defined(__GO32__)
+ int result;
- if (terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
+ if (gdb_has_a_terminal && terminal_is_ours && inferior_thisrun_terminal == 0)
{
- fcntl (0, F_SETFL, tflags_inferior);
- fcntl (0, F_SETFL, tflags_inferior);
- ioctl (0, TIOCSETN, &sg_inferior);
+ result = fcntl (0, F_SETFL, tflags_inferior);
+ result = fcntl (0, F_SETFL, tflags_inferior);
+ OOPSY ("fcntl F_SETFL");
+ result = ioctl (0, TIOCSETN, &sg_inferior);
+ OOPSY ("ioctl TIOCSETN");
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCSETC, &tc_inferior);
+ result = ioctl (0, TIOCSETC, &tc_inferior);
+ OOPSY ("ioctl TIOCSETC");
#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCSLTC, <c_inferior);
+#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
+ result = ioctl (0, TIOCSLTC, <c_inferior);
+ OOPSY ("ioctl TIOCSLTC");
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLSET, &lmode_inferior);
+ result = ioctl (0, TIOCLSET, &lmode_inferior);
+ OOPSY ("ioctl TIOCLSET");
#endif
#ifdef TIOCGPGRP
- ioctl (0, TIOCSPGRP, &pgrp_inferior);
+ result = ioctl (0, TIOCSPGRP, &pgrp_inferior);
+ /* If we attached to the process, we might or might not be sharing
+ a terminal. Avoid printing error msg if we are unable to set our
+ terminal's process group to his process group ID. */
+ if (!attach_flag) {
+ OOPSY ("ioctl TIOCSPGRP");
+ }
#else
- sigint_ours = (int (*) ()) signal (SIGINT, SIG_IGN);
- sigquit_ours = (int (*) ()) signal (SIGQUIT, SIG_IGN);
+ sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN);
+ sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN);
#endif /* TIOCGPGRP */
}
+#endif
terminal_is_ours = 0;
}
void
terminal_ours_for_output ()
{
- if (remote_debugging)
- return;
-
terminal_ours_1 (1);
}
void
terminal_ours ()
{
- if (remote_debugging)
- return;
-
terminal_ours_1 (0);
}
terminal_ours_1 (output_only)
int output_only;
{
+#if !defined(__GO32__)
+ int result;
#ifdef TIOCGPGRP
/* Ignore this signal since it will happen when we try to set the pgrp. */
- int (*osigttou) ();
+ void (*osigttou) ();
#endif /* TIOCGPGRP */
- if (!terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
+ /* Checking inferior_thisrun_terminal is necessary so that
+ if GDB is running in the background, it won't block trying
+ to do the ioctl()'s below. Checking gdb_has_a_terminal
+ avoids attempting all the ioctl's when running in batch. */
+ if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal == 0)
+ return;
+
+ if (!terminal_is_ours)
{
terminal_is_ours = 1;
#ifdef TIOCGPGRP
- osigttou = (int (*) ()) signal (SIGTTOU, SIG_IGN);
+ osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN);
- ioctl (0, TIOCGPGRP, &pgrp_inferior);
- ioctl (0, TIOCSPGRP, &pgrp_ours);
+ result = ioctl (0, TIOCGPGRP, &pgrp_inferior);
+ result = ioctl (0, TIOCSPGRP, &pgrp_ours);
signal (SIGTTOU, osigttou);
#else
#endif /* TIOCGPGRP */
tflags_inferior = fcntl (0, F_GETFL, 0);
- ioctl (0, TIOCGETP, &sg_inferior);
+ result = ioctl (0, TIOCGETP, &sg_inferior);
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCGETC, &tc_inferior);
+ result = ioctl (0, TIOCGETC, &tc_inferior);
#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCGLTC, <c_inferior);
+#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
+ result = ioctl (0, TIOCGLTC, <c_inferior);
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLGET, &lmode_inferior);
+ result = ioctl (0, TIOCLGET, &lmode_inferior);
#endif
}
sg_ours.sg_flags |= (RAW | CBREAK) & sg_inferior.sg_flags;
#endif /* not HAVE_TERMIO */
- fcntl (0, F_SETFL, tflags_ours);
- fcntl (0, F_SETFL, tflags_ours);
- ioctl (0, TIOCSETN, &sg_ours);
+ result = fcntl (0, F_SETFL, tflags_ours);
+ result = fcntl (0, F_SETFL, tflags_ours);
+ result = ioctl (0, TIOCSETN, &sg_ours);
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCSETC, &tc_ours);
+ result = ioctl (0, TIOCSETC, &tc_ours);
#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCSLTC, <c_ours);
+#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
+ result = ioctl (0, TIOCSLTC, <c_ours);
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLSET, &lmode_ours);
+ result = ioctl (0, TIOCLSET, &lmode_ours);
#endif
#ifdef HAVE_TERMIO
#else /* not HAVE_TERMIO */
sg_ours.sg_flags &= ~RAW & ~CBREAK;
#endif /* not HAVE_TERMIO */
+
+ result = result; /* lint */
+#endif
}
-static void
-term_status_command ()
+/* ARGSUSED */
+void
+term_info (arg, from_tty)
+ char *arg;
+ int from_tty;
{
- register int i;
+ target_terminal_info (arg, from_tty);
+}
- if (remote_debugging)
- {
- printf_filtered ("No terminal status when remote debugging.\n");
- return;
- }
+/* ARGSUSED */
+void
+child_terminal_info (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ register int i;
+ if (!gdb_has_a_terminal) {
+ printf_filtered ("This GDB does not control a terminal.\n");
+ return;
+ }
+#if !defined(__GO32__)
+#ifdef TIOCGPGRP
printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
+ printf_filtered ("owner pgrp = %d, fcntl flags = 0x%x.\n",
+ pgrp_inferior, tflags_inferior);
+#endif /* TIOCGPGRP */
+
#ifdef HAVE_TERMIO
- printf_filtered ("fcntl flags = 0x%x, c_iflag = 0x%x, c_oflag = 0x%x,\n",
- tflags_inferior, sg_inferior.c_iflag, sg_inferior.c_oflag);
+ printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ sg_inferior.c_iflag, sg_inferior.c_oflag);
printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
sg_inferior.c_cflag, sg_inferior.c_lflag, sg_inferior.c_line);
printf_filtered ("c_cc: ");
#else /* not HAVE_TERMIO */
- printf_filtered ("fcntl flags = 0x%x, sgttyb.sg_flags = 0x%x, owner pid = %d.\n",
- tflags_inferior, sg_inferior.sg_flags, pgrp_inferior);
+ printf_filtered ("sgttyb.sg_flags = 0x%x.\n", sg_inferior.sg_flags);
#endif /* not HAVE_TERMIO */
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
printf_filtered ("tchars: ");
- for (i = 0; i < sizeof (struct tchars); i++)
- printf_filtered ("0x%x ", ((char *)&tc_inferior)[i]);
+ for (i = 0; i < (int)sizeof (struct tchars); i++)
+ printf_filtered ("0x%x ", ((unsigned char *)&tc_inferior)[i]);
printf_filtered ("\n");
#endif
-#ifdef TIOCGLTC
+#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
printf_filtered ("ltchars: ");
- for (i = 0; i < sizeof (struct ltchars); i++)
- printf_filtered ("0x%x ", ((char *)<c_inferior)[i]);
+ for (i = 0; i < (int)sizeof (struct ltchars); i++)
+ printf_filtered ("0x%x ", ((unsigned char *)<c_inferior)[i]);
printf_filtered ("\n");
- ioctl (0, TIOCSLTC, <c_ours);
#endif
#ifdef TIOCLGET
- printf_filtered ("lmode: %x\n", lmode_inferior);
+ printf_filtered ("lmode: 0x%x\n", lmode_inferior);
#endif
+#else
+ printf_filtered("This is a DOS machine; there is no terminal state\n");
+#endif
+
}
\f
-static void
-new_tty (ttyname)
+/* NEW_TTY_PREFORK is called before forking a new child process,
+ so we can record the state of ttys in the child to be formed.
+ TTYNAME is null if we are to share the terminal with gdb;
+ or points to a string containing the name of the desired tty.
+
+ NEW_TTY is called in new child processes under Unix, which will
+ become debugger target processes. This actually switches to
+ the terminal specified in the NEW_TTY_PREFORK call. */
+
+void
+new_tty_prefork (ttyname)
char *ttyname;
+{
+ /* Save the name for later, for determining whether we and the child
+ are sharing a tty. */
+ inferior_thisrun_terminal = ttyname;
+}
+
+void
+new_tty ()
{
register int tty;
- register int fd;
+ void (*osigttou) ();
+ if (inferior_thisrun_terminal == 0)
+ return;
+#if !defined(__GO32__)
#ifdef TIOCNOTTY
- /* Disconnect the child process from our controlling terminal. */
+ /* Disconnect the child process from our controlling terminal. On some
+ systems (SVR4 for example), this may cause a SIGTTOU, so temporarily
+ ignore SIGTTOU. */
tty = open("/dev/tty", O_RDWR);
if (tty > 0)
{
+ osigttou = (void (*)()) signal(SIGTTOU, SIG_IGN);
ioctl(tty, TIOCNOTTY, 0);
close(tty);
+ (void) signal(SIGTTOU, osigttou);
}
#endif
/* Now open the specified new terminal. */
- tty = open(ttyname, O_RDWR);
+#ifdef USE_O_NOCTTY
+ tty = open(inferior_thisrun_terminal, O_RDWR | O_NOCTTY);
+#else
+ tty = open(inferior_thisrun_terminal, O_RDWR);
+#endif
if (tty == -1)
- _exit(1);
+ {
+ print_sys_errmsg (inferior_thisrun_terminal, errno);
+ _exit(1);
+ }
/* Avoid use of dup2; doesn't exist on all systems. */
if (tty != 0)
{ close (2); dup (tty); }
if (tty > 2)
close(tty);
+#endif /* !go32*/o
}
\f
-/* Start an inferior process and returns its pid.
- ALLARGS is a string containing shell command to run the program.
- ENV is the environment vector to pass. */
-
-#ifndef SHELL_FILE
-#define SHELL_FILE "/bin/sh"
-#endif
-
-int
-create_inferior (allargs, env)
- char *allargs;
- char **env;
-{
- int pid;
- char *shell_command;
- extern int sys_nerr;
- extern char *sys_errlist[];
- extern int errno;
-
- /* If desired, concat something onto the front of ALLARGS.
- SHELL_COMMAND is the result. */
-#ifdef SHELL_COMMAND_CONCAT
- shell_command = (char *) alloca (strlen (SHELL_COMMAND_CONCAT) + strlen (allargs) + 1);
- strcpy (shell_command, SHELL_COMMAND_CONCAT);
- strcat (shell_command, allargs);
-#else
- shell_command = allargs;
-#endif
-
- /* exec is said to fail if the executable is open. */
- close_exec_file ();
-
-#if defined(USG) && !defined(HAVE_VFORK)
- pid = fork ();
-#else
- pid = vfork ();
-#endif
-
- if (pid < 0)
- perror_with_name ("vfork");
-
- if (pid == 0)
- {
-#ifdef TIOCGPGRP
- /* Run inferior in a separate process group. */
- setpgrp (getpid (), getpid ());
-#endif /* TIOCGPGRP */
-
-#ifdef SET_STACK_LIMIT_HUGE
- /* Reset the stack limit back to what it was. */
- {
- struct rlimit rlim;
-
- getrlimit (RLIMIT_STACK, &rlim);
- rlim.rlim_cur = original_stack_limit;
- setrlimit (RLIMIT_STACK, &rlim);
- }
-#endif /* SET_STACK_LIMIT_HUGE */
-
-
- inferior_thisrun_terminal = inferior_io_terminal;
- if (inferior_io_terminal != 0)
- new_tty (inferior_io_terminal);
-
-/* It seems that changing the signal handlers for the inferior after
- a vfork also changes them for the superior. See comments in
- initialize_signals for how we get the right signal handlers
- for the inferior. */
-/* Not needed on Sun, at least, and loses there
- because it clobbers the superior. */
-/*??? signal (SIGQUIT, SIG_DFL);
- signal (SIGINT, SIG_DFL); */
-
- call_ptrace (0);
- execle (SHELL_FILE, "sh", "-c", shell_command, 0, env);
-
- fprintf (stderr, "Cannot exec %s: %s.\n", SHELL_FILE,
- errno < sys_nerr ? sys_errlist[errno] : "unknown error");
- fflush (stderr);
- _exit (0177);
- }
-
-#ifdef CREATE_INFERIOR_HOOK
- CREATE_INFERIOR_HOOK (pid);
-#endif
- return pid;
-}
-
/* Kill the inferior process. Make us have no inferior. */
+/* ARGSUSED */
static void
-kill_command ()
+kill_command (arg, from_tty)
+ char *arg;
+ int from_tty;
{
- if (remote_debugging)
- return;
if (inferior_pid == 0)
error ("The program is not being run.");
if (!query ("Kill the inferior process? "))
error ("Not confirmed.");
- kill_inferior ();
+ target_kill ();
+
+ /* Killing off the inferior can leave us with a core file. If so,
+ print the state we are left in. */
+ if (target_has_stack) {
+ printf_filtered ("In %s,\n", current_target->to_longname);
+ if (selected_frame == NULL)
+ fputs_filtered ("No selected stack frame.\n", stdout);
+ else
+ print_stack_frame (selected_frame, selected_frame_level, 1);
+ }
}
+/* The inferior process has died. Long live the inferior! */
+
void
-inferior_died ()
+generic_mourn_inferior ()
{
inferior_pid = 0;
attach_flag = 0;
mark_breakpoints_out ();
- select_frame ((FRAME) 0, -1);
+ registers_changed ();
+
+#ifdef CLEAR_DEFERRED_STORES
+ /* Delete any pending stores to the inferior... */
+ CLEAR_DEFERRED_STORES;
+#endif
+
reopen_exec_file ();
- if (have_core_file_p ())
+ if (target_has_stack) {
set_current_frame ( create_new_frame (read_register (FP_REGNUM),
read_pc ()));
- else
+ select_frame (get_current_frame (), 0);
+ } else {
set_current_frame (0);
+ select_frame ((FRAME) 0, -1);
+ }
+ /* It is confusing to the user for ignore counts to stick around
+ from previous runs of the inferior. So clear them. */
+ breakpoint_clear_ignore_counts ();
+}
+
+void
+child_mourn_inferior ()
+{
+ unpush_target (&child_ops);
+ generic_mourn_inferior ();
}
\f
+#if 0
+/* This function is just for testing, and on some systems (Sony NewsOS
+ 3.2) <sys/user.h> also includes <sys/time.h> which leads to errors
+ (since on this system at least sys/time.h is not protected against
+ multiple inclusion). */
+/* ARGSUSED */
static void
-try_writing_regs_command ()
+try_writing_regs_command (arg, from_tty)
+ char *arg;
+ int from_tty;
{
register int i;
register int value;
- extern int errno;
if (inferior_pid == 0)
error ("There is no inferior process now.");
- for (i = 0; ; i += 2)
+ /* A Sun 3/50 or 3/60 (at least) running SunOS 4.0.3 will have a
+ kernel panic if we try to write past the end of the user area.
+ Presumably Sun will fix this bug (it has been reported), but it
+ is tacky to crash the system, so at least on SunOS4 we need to
+ stop writing when we hit the end of the user area. */
+ for (i = 0; i < sizeof (struct user); i += 2)
{
QUIT;
errno = 0;
- value = call_ptrace (3, inferior_pid, i, 0);
- call_ptrace (6, inferior_pid, i, value);
+ value = call_ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) i, 0);
+ call_ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) i, value);
if (errno == 0)
{
printf (" Succeeded with address 0x%x; value 0x%x (%d).\n",
printf (" Failed at 0x%x.\n", i);
}
}
+#endif
\f
void
_initialize_inflow ()
{
- add_com ("term-status", class_obscure, term_status_command,
- "Print info on inferior's saved terminal status.");
+ int result;
+
+ add_info ("terminal", term_info,
+ "Print inferior's saved terminal status.");
+#if 0
add_com ("try-writing-regs", class_obscure, try_writing_regs_command,
"Try writing all locations in inferior's system block.\n\
Report which ones can be written.");
+#endif
add_com ("kill", class_run, kill_command,
"Kill execution of program being debugged.");
inferior_pid = 0;
- ioctl (0, TIOCGETP, &sg_ours);
- fcntl (0, F_GETFL, tflags_ours);
+ /* Get all the current tty settings (including whether we have a tty at
+ all!). */
+#if !defined(__GO32__)
+ tflags_ours = fcntl (0, F_GETFL, 0);
+
+ result = ioctl (0, TIOCGETP, &sg_ours);
+ if (result == 0) {
+ gdb_has_a_terminal = 1;
+ /* Get the rest of the tty settings, then... */
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCGETC, &tc_ours);
+ ioctl (0, TIOCGETC, &tc_ours);
#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCGLTC, <c_ours);
+#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
+ ioctl (0, TIOCGLTC, <c_ours);
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLGET, &lmode_ours);
+ ioctl (0, TIOCLGET, &lmode_ours);
#endif
-
#ifdef TIOCGPGRP
- ioctl (0, TIOCGPGRP, &pgrp_ours);
+ ioctl (0, TIOCGPGRP, &pgrp_ours);
#endif /* TIOCGPGRP */
+ } else {
+ gdb_has_a_terminal = 0;
+ }
+#else
+ gdb_has_a_terminal = 0;
+#endif
+
terminal_is_ours = 1;
}
-
projects / binutils.git / blobdiff