#include "command.h"
#include "signals.h"
#include "serial.h"
+#include "terminal.h"
#include "target.h"
+#include "thread.h"
-#ifdef USG
-#include <sys/types.h>
+#include <signal.h>
+#include <fcntl.h>
+
+#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY) && !defined (__GO32__)
+#define HAVE_SGTTY
#endif
-/* 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>
+#if defined (HAVE_TERMIOS)
+#include <termios.h>
+#include <unistd.h>
+#endif
-#include <sys/param.h>
-#include <signal.h>
+#ifdef HAVE_TERMIOS
+#define PROCESS_GROUP_TYPE pid_t
+#endif
+
+#ifdef HAVE_SGTTY
+#ifdef SHORT_PGRP
+/* This is only used for the ultra. Does it have pid_t? */
+#define PROCESS_GROUP_TYPE short
+#else
+#define PROCESS_GROUP_TYPE int
+#endif
+#endif /* sgtty */
static void
kill_command PARAMS ((char *, int));
static void
terminal_ours_1 PARAMS ((int));
-
-/* Nonzero if we are debugging an attached outside process
- rather than an inferior. */
-
-int attach_flag;
-
\f
/* Record terminal status separately for debugger and inferior. */
static int tflags_inferior;
static int tflags_ours;
+#ifdef PROCESS_GROUP_TYPE
+/* Process group for us and the inferior. Saved and restored just like
+ {our,inferior}_ttystate. */
+PROCESS_GROUP_TYPE our_process_group;
+PROCESS_GROUP_TYPE inferior_process_group;
+#endif
+
/* While the inferior is running, we want SIGINT and SIGQUIT to go to the
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
static char *inferior_thisrun_terminal;
-/* Nonzero if our terminal settings are in effect.
- Zero if the inferior's settings are in effect. */
+/* Nonzero if our terminal settings are in effect. Zero if the
+ inferior's settings are in effect. Ignored if !gdb_has_a_terminal
+ (). */
static int terminal_is_ours;
all!). Can't do this in _initialize_inflow because SERIAL_FDOPEN
won't work until the serial_ops_list is initialized. */
+#ifdef F_GETFL
tflags_ours = fcntl (0, F_GETFL, 0);
+#endif
gdb_has_a_terminal_flag = no;
stdin_serial = SERIAL_FDOPEN (0);
if (stdin_serial != NULL)
{
our_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+
if (our_ttystate != NULL)
- gdb_has_a_terminal_flag = yes;
+ {
+ gdb_has_a_terminal_flag = yes;
+#ifdef HAVE_TERMIOS
+ our_process_group = tcgetpgrp (0);
+#endif
+#ifdef HAVE_SGTTY
+ ioctl (0, TIOCGPGRP, &our_process_group);
+#endif
+ }
}
return gdb_has_a_terminal_flag == yes;
+ default:
+ /* "Can't happen". */
+ return 0;
}
}
#define OOPSY(what) \
if (result == -1) \
- fprintf(stderr, "[%s failed in terminal_inferior: %s]\n", \
+ fprintf_unfiltered(gdb_stderr, "[%s failed in terminal_inferior: %s]\n", \
what, strerror (errno))
static void terminal_ours_1 PARAMS ((int));
void
terminal_init_inferior ()
{
- /* Make sure that our_ttystate (etc) are initialized. */
- gdb_has_a_terminal ();
-
- /* We could just as well copy our_ttystate (if we felt like adding
- a new function SERIAL_COPY_TTY_STATE). */
- if (inferior_ttystate)
- free (inferior_ttystate);
- inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
- SERIAL_SET_PROCESS_GROUP (stdin_serial, inferior_ttystate, inferior_pid);
-
- /* Make sure that next time we call terminal_inferior (which will be
- before the program runs, as it needs to be), we install the new
- process group. */
- terminal_is_ours = 1;
+ if (gdb_has_a_terminal ())
+ {
+ /* We could just as well copy our_ttystate (if we felt like adding
+ a new function SERIAL_COPY_TTY_STATE). */
+ if (inferior_ttystate)
+ free (inferior_ttystate);
+ inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+#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). */
+ inferior_process_group = PIDGET (inferior_pid);
+#else
+ inferior_process_group = inferior_pid;
+#endif
+#endif
+
+ /* Make sure that next time we call terminal_inferior (which will be
+ before the program runs, as it needs to be), we install the new
+ process group. */
+ terminal_is_ours = 1;
+ }
}
/* Put the inferior's terminal settings into effect.
{
int result;
+#ifdef F_GETFL
/* Is there a reason this is being done twice? It happens both
places we use F_SETFL, so I'm inclined to think perhaps there
is some reason, however perverse. Perhaps not though... */
result = fcntl (0, F_SETFL, tflags_inferior);
result = fcntl (0, F_SETFL, tflags_inferior);
OOPSY ("fcntl F_SETFL");
+#endif
/* Because we were careful to not change in or out of raw mode in
terminal_ours, we will not change in our out of raw mode with
this call, so we don't flush any input. */
result = SERIAL_SET_TTY_STATE (stdin_serial, inferior_ttystate);
+ OOPSY ("setting tty state");
+
+ if (!job_control)
+ {
+ sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN);
+ sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN);
+ }
/* If attach_flag is set, we don't know whether we are sharing a
terminal with the inferior or not. (attaching a process
`sharing' in the sense that we need to save and restore tty
state)). I don't know if there is any way to tell whether we
are sharing a terminal. So what we do is to go through all
- the saving and restoring of terminal state, but ignore errors
- (which will occur, in tcsetpgrp, if we are not sharing a
- terminal). */
+ the saving and restoring of the tty state, but ignore errors
+ setting the process group, which will happen if we are not
+ sharing a terminal). */
- if (!attach_flag)
- OOPSY ("setting tty state");
-
- if (!job_control)
+ if (job_control)
{
- sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN);
- sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN);
+#ifdef HAVE_TERMIOS
+ result = tcsetpgrp (0, inferior_process_group);
+ if (!attach_flag)
+ OOPSY ("tcsetpgrp");
+#endif
+
+#ifdef HAVE_SGTTY
+ result = ioctl (0, TIOCSPGRP, &inferior_process_group);
+ if (!attach_flag)
+ OOPSY ("TIOCSPGRP");
+#endif
}
+
}
terminal_is_ours = 0;
}
if (inferior_ttystate)
free (inferior_ttystate);
inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+#ifdef HAVE_TERMIOS
+ inferior_process_group = tcgetpgrp (0);
+#endif
+#ifdef HAVE_SGTTY
+ ioctl (0, TIOCGPGRP, &inferior_process_group);
+#endif
/* 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 (job_control)
+ {
+#ifdef HAVE_TERMIOS
+ result = tcsetpgrp (0, our_process_group);
+#if 0
+ /* This fails on Ultrix with EINVAL if you run the testsuite
+ in the background with nohup, and then log out. GDB never
+ used to check for an error here, so perhaps there are other
+ such situations as well. */
+ if (result == -1)
+ fprintf_unfiltered (gdb_stderr, "[tcsetpgrp failed in terminal_ours: %s]\n",
+ strerror (errno));
+#endif
+#endif /* termios */
+
+#ifdef HAVE_SGTTY
+ result = ioctl (0, TIOCSPGRP, &our_process_group);
+#endif
+ }
+
#ifdef SIGTTOU
if (job_control)
signal (SIGTTOU, osigttou);
signal (SIGQUIT, sigquit_ours);
}
+#ifdef F_GETFL
tflags_inferior = fcntl (0, F_GETFL, 0);
/* Is there a reason this is being done twice? It happens both
is some reason, however perverse. Perhaps not though... */
result = fcntl (0, F_SETFL, tflags_ours);
result = fcntl (0, F_SETFL, tflags_ours);
+#endif
result = result; /* lint */
}
printf_filtered ("\n");
}
+#ifdef PROCESS_GROUP_TYPE
+ printf_filtered ("Process group = %d\n", inferior_process_group);
+#endif
+
SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate);
}
\f
new_tty ()
{
register int tty;
- void (*osigttou) ();
if (inferior_thisrun_terminal == 0)
return;
tty = open("/dev/tty", O_RDWR);
if (tty > 0)
{
+ void (*osigttou) ();
+
osigttou = (void (*)()) signal(SIGTTOU, SIG_IGN);
ioctl(tty, TIOCNOTTY, 0);
close(tty);
char *arg;
int from_tty;
{
- /* Shouldn't this be target_has_execution? FIXME. */
- if (inferior_pid == 0)
+ if (!target_has_execution)
error ("The program is not being run.");
if (!query ("Kill the program being debugged? "))
error ("Not confirmed.");
target_kill ();
+ init_thread_list(); /* Destroy thread info */
+
/* 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", stdout);
+ 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;
- mark_breakpoints_out ();
- registers_changed ();
-
-#ifdef CLEAR_DEFERRED_STORES
- /* Delete any pending stores to the inferior... */
- CLEAR_DEFERRED_STORES;
-#endif
-
- reopen_exec_file ();
- if (target_has_stack) {
- set_current_frame ( create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
- 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 ();
-}
\f
/* Call set_sigint_trap when you need to pass a signal on to an attached
process when handling SIGINT */
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 ();
+}
+
+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
+ setpgid or setpgrp might not exist on a system without job control.
+ It might be considered misplaced (on the other hand, process groups and
+ job control are closely related to ttys).
+
+ For a more clean implementation, in libiberty, put a setpgid which merely
+ calls setpgrp and a setpgrp which does nothing (any system with job control
+ will have one or the other). */
+int
+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. */
+ /* 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). */
+ retval = setpgid (getpid (), getpid ());
+#else
+#if defined (TIOCGPGRP)
+#if defined(USG) && !defined(SETPGRP_ARGS)
+ retval = setpgrp ();
+#else
+ retval = setpgrp (getpid (), getpid ());
+#endif /* USG */
+#endif /* TIOCGPGRP. */
+#endif /* NEED_POSIX_SETPGID */
+ }
+ return retval;
+}
+
void
_initialize_inflow ()
{
inferior_pid = 0;
terminal_is_ours = 1;
+
+ /* OK, figure out whether we have job control. If neither termios nor
+ sgtty (i.e. termio or go32), leave job_control 0. */
+
+#if defined (HAVE_TERMIOS)
+ /* Do all systems with termios have the POSIX way of identifying job
+ control? I hope so. */
+#ifdef _POSIX_JOB_CONTROL
+ job_control = 1;
+#else
+ job_control = sysconf (_SC_JOB_CONTROL);
+#endif
+#endif /* termios */
+
+#ifdef HAVE_SGTTY
+#ifdef TIOCGPGRP
+ job_control = 1;
+#else
+ job_control = 0;
+#endif /* TIOCGPGRP */
+#endif /* sgtty */
}