/* Low level interface to ptrace, for GDB when running under Unix.
- Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1992, 1995 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "frame.h"
#include "serial.h"
#include "terminal.h"
#include "target.h"
-#include "thread.h"
+#include "gdbthread.h"
+#include "gdb_string.h"
#include <signal.h>
#include <fcntl.h>
-
-#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY) && !defined (__GO32__)
-#define HAVE_SGTTY
-#endif
-
-#if defined (HAVE_TERMIOS)
-#include <termios.h>
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#endif
#endif /* sgtty */
+#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
static void
-kill_command PARAMS ((char *, int));
+handle_sigio PARAMS ((int));
+#endif
static void
-terminal_ours_1 PARAMS ((int));
-
-/* Nonzero if we are debugging an attached outside process
- rather than an inferior. */
+pass_signal PARAMS ((int));
-int attach_flag;
+static void
+kill_command PARAMS ((char *, int));
+static void
+terminal_ours_1 PARAMS ((int));
\f
/* Record terminal status separately for debugger and inferior. */
inferior only. If we have job control, that takes care of it. If not,
we save our handlers in these two variables and set SIGINT and SIGQUIT
to SIG_IGN. */
+
static void (*sigint_ours) ();
static void (*sigquit_ours) ();
before we actually run the inferior. */
void
-terminal_init_inferior ()
+terminal_init_inferior_with_pgrp (pgrp)
+ int pgrp;
{
if (gdb_has_a_terminal ())
{
if (inferior_ttystate)
free (inferior_ttystate);
inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+
#ifdef PROCESS_GROUP_TYPE
-#ifdef PIDGET /* XXX Lynx */
- inferior_process_group = PIDGET (inferior_pid);
-#else
- inferior_process_group = inferior_pid;
-#endif
+ inferior_process_group = pgrp;
#endif
/* Make sure that next time we call terminal_inferior (which will be
}
}
+void
+terminal_init_inferior ()
+{
+#ifdef PROCESS_GROUP_TYPE
+#ifdef PIDGET
+ /* This is for Lynx, and should be cleaned up by having Lynx be a separate
+ debugging target with a version of target_terminal_init_inferior which
+ passes in the process group to a generic routine which does all the work
+ (and the non-threaded child_terminal_init_inferior can just pass in
+ inferior_pid to the same routine). */
+ terminal_init_inferior_with_pgrp (PIDGET (inferior_pid));
+#else
+ /* By default, we assume INFERIOR_PID is also the child's process group. */
+ terminal_init_inferior_with_pgrp (inferior_pid);
+#endif
+#endif /* PROCESS_GROUP_TYPE */
+}
+
/* Put the inferior's terminal settings into effect.
This is preparation for starting or resuming the inferior. */
/* Here we used to set ICANON in our ttystate, but I believe this
was an artifact from before when we used readline. Readline sets
- the tty state when it needs to. */
+ the tty state when it needs to.
+ FIXME-maybe: However, query() expects non-raw mode and doesn't
+ use readline. Maybe query should use readline (on the other hand,
+ this only matters for HAVE_SGTTY, not termio or termios, I think). */
/* Set tty state to our_ttystate. We don't change in our out of raw
mode, to avoid flushing input. We need to do the same thing
terminal_is_ours and terminal_is_ours_for_output flags. It's OK,
though, since readline will deal with raw mode when/if it needs to.
*/
+
SERIAL_NOFLUSH_SET_TTY_STATE (stdin_serial, our_ttystate,
inferior_ttystate);
if (inferior_thisrun_terminal == 0)
return;
-#if !defined(__GO32__)
+#if !defined(__GO32__) && !defined(__WIN32__)
#ifdef TIOCNOTTY
/* Disconnect the child process from our controlling terminal. On some
systems (SVR4 for example), this may cause a SIGTTOU, so temporarily
{ close (2); dup (tty); }
if (tty > 2)
close(tty);
-#endif /* !go32 */
+#endif /* !go32 && !win32*/
}
\f
/* Kill the inferior process. Make us have no inferior. */
char *arg;
int from_tty;
{
- /* Shouldn't this be target_has_execution? FIXME. */
+ /* FIXME: This should not really be inferior_pid (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_pid == 0)
error ("The program is not being run.");
if (!query ("Kill the program being debugged? "))
/* 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);
+ printf_filtered ("In %s,\n", target_longname);
if (selected_frame == NULL)
fputs_filtered ("No selected stack frame.\n", gdb_stdout);
else
print_stack_frame (selected_frame, selected_frame_level, 1);
}
}
-
-/* The inferior process has died. Long live the inferior! */
-
-void
-generic_mourn_inferior ()
-{
- inferior_pid = 0;
- attach_flag = 0;
- breakpoint_init_inferior ();
- registers_changed ();
-
-#ifdef CLEAR_DEFERRED_STORES
- /* Delete any pending stores to the inferior... */
- CLEAR_DEFERRED_STORES;
-#endif
-
- reopen_exec_file ();
- reinit_frame_cache ();
-
- /* 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 ();
-}
\f
/* Call set_sigint_trap when you need to pass a signal on to an attached
process when handling SIGINT */
void
set_sigint_trap()
{
- osig = (void (*) ()) signal (SIGINT, pass_signal);
+ if (attach_flag || inferior_thisrun_terminal)
+ {
+ osig = (void (*) ()) signal (SIGINT, pass_signal);
+ }
}
void
clear_sigint_trap()
{
- signal (SIGINT, osig);
+ if (attach_flag || inferior_thisrun_terminal)
+ {
+ signal (SIGINT, osig);
+ }
}
\f
+#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
+static void (*old_sigio) ();
+
+static void
+handle_sigio (signo)
+ int signo;
+{
+ int numfds;
+ fd_set readfds;
+
+ signal (SIGIO, handle_sigio);
+
+ FD_ZERO (&readfds);
+ FD_SET (target_activity_fd, &readfds);
+ numfds = select (target_activity_fd + 1, &readfds, NULL, NULL, NULL);
+ if (numfds >= 0 && FD_ISSET (target_activity_fd, &readfds))
+ {
+ if ((*target_activity_function) ())
+ kill (inferior_pid, SIGINT);
+ }
+}
+
+static int old_fcntl_flags;
+
+void
+set_sigio_trap ()
+{
+ if (target_activity_function)
+ {
+ old_sigio = (void (*) ()) signal (SIGIO, handle_sigio);
+ fcntl (target_activity_fd, F_SETOWN, getpid());
+ old_fcntl_flags = fcntl (target_activity_fd, F_GETFL, 0);
+ fcntl (target_activity_fd, F_SETFL, old_fcntl_flags | FASYNC);
+ }
+}
+
+void
+clear_sigio_trap ()
+{
+ if (target_activity_function)
+ {
+ signal (SIGIO, old_sigio);
+ fcntl (target_activity_fd, F_SETFL, old_fcntl_flags);
+ }
+}
+#else /* No SIGIO. */
+void
+set_sigio_trap ()
+{
+ if (target_activity_function)
+ abort ();
+}
-int job_control;
+void
+clear_sigio_trap ()
+{
+ if (target_activity_function)
+ abort ();
+}
+#endif /* No SIGIO. */
+\f
/* This is here because this is where we figure out whether we (probably)
have job control. Just using job_control only does part of it because
gdb_setpgid ()
{
int retval = 0;
+
if (job_control)
{
-#if defined (NEED_POSIX_SETPGID) || defined (HAVE_TERMIOS)
- /* Do all systems with termios have setpgid? I hope so. */
+#if defined (NEED_POSIX_SETPGID) || (defined (HAVE_TERMIOS) && defined (HAVE_SETPGID))
/* setpgid (0, 0) is supposed to work and mean the same thing as
this, but on Ultrix 4.2A it fails with EPERM (and
setpgid (getpid (), getpid ()) succeeds). */
#ifdef _POSIX_JOB_CONTROL
job_control = 1;
#else
+#ifdef _SC_JOB_CONTROL
job_control = sysconf (_SC_JOB_CONTROL);
-#endif
-#endif /* termios */
+#else
+ job_control = 0; /* have to assume the worst */
+#endif /* _SC_JOB_CONTROL */
+#endif /* _POSIX_JOB_CONTROL */
+#endif /* HAVE_TERMIOS */
#ifdef HAVE_SGTTY
#ifdef TIOCGPGRP
projects / deliverable / binutils-gdb.git / blobdiff