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* inflow.c (pass_signal): Signal handlers take one int arg;
supply an unused one to make it type compatible as an arg to signal().
This commit is contained in:
Fred Fish
parent
c2b781a26e
commit
a88797b5ea
@ -1,3 +1,9 @@
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Wed Aug 4 18:32:12 1993 Fred Fish (fnf@cygnus.com)
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* inflow.c (pass_signal): Signal handlers take one int arg;
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supply an unused one to make it type compatible as an arg to
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signal().
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Tue Aug 3 18:34:14 1993 Ian Lance Taylor (ian@cygnus.com)
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* config/mips/tm-mips.h: Include bfd.h before coff/sym.h.
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481
gdb/inflow.c
481
gdb/inflow.c
@ -22,7 +22,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "inferior.h"
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#include "command.h"
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#include "signals.h"
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#include "terminal.h"
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#include "serial.h"
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#include "target.h"
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#ifdef USG
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@ -42,8 +42,6 @@ kill_command PARAMS ((char *, int));
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static void
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terminal_ours_1 PARAMS ((int));
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extern struct target_ops child_ops;
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/* Nonzero if we are debugging an attached outside process
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rather than an inferior. */
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@ -52,42 +50,28 @@ int attach_flag;
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/* Record terminal status separately for debugger and inferior. */
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/* Does GDB have a terminal (on stdin)? */
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int gdb_has_a_terminal;
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#if !defined(__GO32__)
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static TERMINAL sg_inferior;
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static TERMINAL sg_ours;
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#endif
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static serial_t stdin_serial;
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/* TTY state for the inferior. We save it whenever the inferior stops, and
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restore it when it resumes. */
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static serial_ttystate inferior_ttystate;
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/* Our own tty state, which we restore every time we need to deal with the
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terminal. We only set it once, when GDB first starts. The settings of
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flags which readline saves and restores and unimportant. */
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static serial_ttystate our_ttystate;
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/* fcntl flags for us and the inferior. Saved and restored just like
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{our,inferior}_ttystate. */
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static int tflags_inferior;
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static int tflags_ours;
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#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
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static struct tchars tc_inferior;
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static struct tchars tc_ours;
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#endif
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#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
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static struct ltchars ltc_inferior;
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static struct ltchars ltc_ours;
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#endif
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#ifdef TIOCLGET
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static int lmode_inferior;
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static int lmode_ours;
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#endif
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#ifdef TIOCGPGRP
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# ifdef SHORT_PGRP
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static short pgrp_inferior;
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static short pgrp_ours;
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# else /* not def SHORT_PGRP */
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static int pgrp_inferior;
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static int pgrp_ours;
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# endif /* not def SHORT_PGRP */
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#else /* not def TIOCGPGRP */
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/* While the inferior is running, we want SIGINT and SIGQUIT to go to the
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inferior only. If we have job control, that takes care of it. If not,
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we save our handlers in these two variables and set SIGINT and SIGQUIT
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to SIG_IGN. */
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static void (*sigint_ours) ();
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static void (*sigquit_ours) ();
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#endif /* TIOCGPGRP */
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/* The name of the tty (from the `tty' command) that we gave to the inferior
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when it was last started. */
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@ -99,6 +83,38 @@ static char *inferior_thisrun_terminal;
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static int terminal_is_ours;
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enum {yes, no, have_not_checked} gdb_has_a_terminal_flag = have_not_checked;
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/* Does GDB have a terminal (on stdin)? */
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int
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gdb_has_a_terminal ()
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{
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switch (gdb_has_a_terminal_flag)
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{
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case yes:
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return 1;
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case no:
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return 0;
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case have_not_checked:
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/* Get all the current tty settings (including whether we have a tty at
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all!). Can't do this in _initialize_inflow because SERIAL_FDOPEN
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won't work until the serial_ops_list is initialized. */
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tflags_ours = fcntl (0, F_GETFL, 0);
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gdb_has_a_terminal_flag = no;
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stdin_serial = SERIAL_FDOPEN (0);
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if (stdin_serial != NULL)
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{
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our_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
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if (our_ttystate != NULL)
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gdb_has_a_terminal_flag = yes;
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}
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return gdb_has_a_terminal_flag == yes;
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}
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}
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/* Macro for printing errors from ioctl operations */
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#define OOPSY(what) \
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@ -106,7 +122,7 @@ static int terminal_is_ours;
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fprintf(stderr, "[%s failed in terminal_inferior: %s]\n", \
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what, strerror (errno))
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static void terminal_ours_1 ();
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static void terminal_ours_1 PARAMS ((int));
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/* Initialize the terminal settings we record for the inferior,
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before we actually run the inferior. */
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@ -114,26 +130,19 @@ static void terminal_ours_1 ();
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void
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terminal_init_inferior ()
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{
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#if !defined(__GO32__)
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sg_inferior = sg_ours;
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tflags_inferior = tflags_ours;
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/* Make sure that our_ttystate (etc) are initialized. */
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gdb_has_a_terminal ();
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#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
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tc_inferior = tc_ours;
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#endif
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/* We could just as well copy our_ttystate (if we felt like adding
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a new function SERIAL_COPY_TTY_STATE). */
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if (inferior_ttystate)
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free (inferior_ttystate);
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inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
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SERIAL_SET_PROCESS_GROUP (stdin_serial, inferior_ttystate, inferior_pid);
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#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
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ltc_inferior = ltc_ours;
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#endif
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#ifdef TIOCLGET
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lmode_inferior = lmode_ours;
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#endif
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#ifdef TIOCGPGRP
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pgrp_inferior = inferior_pid;
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#endif /* TIOCGPGRP */
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#endif
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/* Make sure that next time we call terminal_inferior (which will be
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before the program runs, as it needs to be), we install the new
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process group. */
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terminal_is_ours = 1;
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}
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@ -143,44 +152,44 @@ terminal_init_inferior ()
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void
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terminal_inferior ()
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{
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#if !defined(__GO32__)
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int result;
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if (gdb_has_a_terminal && terminal_is_ours && inferior_thisrun_terminal == 0)
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if (gdb_has_a_terminal () && terminal_is_ours
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&& inferior_thisrun_terminal == 0)
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{
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int result;
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/* Is there a reason this is being done twice? It happens both
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places we use F_SETFL, so I'm inclined to think perhaps there
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is some reason, however perverse. Perhaps not though... */
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result = fcntl (0, F_SETFL, tflags_inferior);
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result = fcntl (0, F_SETFL, tflags_inferior);
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OOPSY ("fcntl F_SETFL");
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result = ioctl (0, TIOCSETN, &sg_inferior);
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OOPSY ("ioctl TIOCSETN");
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#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
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result = ioctl (0, TIOCSETC, &tc_inferior);
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OOPSY ("ioctl TIOCSETC");
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#endif
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#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
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result = ioctl (0, TIOCSLTC, <c_inferior);
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OOPSY ("ioctl TIOCSLTC");
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#endif
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#ifdef TIOCLGET
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result = ioctl (0, TIOCLSET, &lmode_inferior);
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OOPSY ("ioctl TIOCLSET");
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#endif
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/* Because we were careful to not change in or out of raw mode in
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terminal_ours, we will not change in our out of raw mode with
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this call, so we don't flush any input. */
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result = SERIAL_SET_TTY_STATE (stdin_serial, inferior_ttystate);
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#ifdef TIOCGPGRP
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result = ioctl (0, TIOCSPGRP, &pgrp_inferior);
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/* If we attached to the process, we might or might not be sharing
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a terminal. Avoid printing error msg if we are unable to set our
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terminal's process group to his process group ID. */
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if (!attach_flag) {
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OOPSY ("ioctl TIOCSPGRP");
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}
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#else
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sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN);
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sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN);
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#endif /* TIOCGPGRP */
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/* If attach_flag is set, we don't know whether we are sharing a
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terminal with the inferior or not. (attaching a process
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without a terminal is one case where we do not; attaching a
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process which we ran from the same shell as GDB via `&' is
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one case where we do, I think (but perhaps this is not
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`sharing' in the sense that we need to save and restore tty
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state)). I don't know if there is any way to tell whether we
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are sharing a terminal. So what we do is to go through all
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the saving and restoring of terminal state, but ignore errors
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(which will occur, in tcsetpgrp, if we are not sharing a
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terminal). */
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if (!attach_flag)
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OOPSY ("setting tty state");
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if (!job_control)
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{
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sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN);
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sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN);
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}
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}
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#endif
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terminal_is_ours = 0;
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}
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@ -208,86 +217,73 @@ terminal_ours ()
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terminal_ours_1 (0);
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}
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/* output_only is not used, and should not be used unless we introduce
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separate terminal_is_ours and terminal_is_ours_for_output
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flags. */
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static void
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terminal_ours_1 (output_only)
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int output_only;
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{
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#if !defined(__GO32__)
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int result;
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#ifdef TIOCGPGRP
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/* Ignore this signal since it will happen when we try to set the pgrp. */
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void (*osigttou) ();
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#endif /* TIOCGPGRP */
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/* Checking inferior_thisrun_terminal is necessary so that
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if GDB is running in the background, it won't block trying
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to do the ioctl()'s below. Checking gdb_has_a_terminal
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avoids attempting all the ioctl's when running in batch. */
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if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal == 0)
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if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal () == 0)
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return;
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if (!terminal_is_ours)
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{
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/* Ignore this signal since it will happen when we try to set the
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pgrp. */
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void (*osigttou) ();
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int result;
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terminal_is_ours = 1;
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#ifdef TIOCGPGRP
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osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN);
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#ifdef SIGTTOU
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if (job_control)
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osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN);
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#endif
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result = ioctl (0, TIOCGPGRP, &pgrp_inferior);
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result = ioctl (0, TIOCSPGRP, &pgrp_ours);
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if (inferior_ttystate)
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free (inferior_ttystate);
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inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
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signal (SIGTTOU, osigttou);
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#else
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signal (SIGINT, sigint_ours);
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signal (SIGQUIT, sigquit_ours);
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#endif /* TIOCGPGRP */
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/* Here we used to set ICANON in our ttystate, but I believe this
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was an artifact from before when we used readline. Readline sets
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the tty state when it needs to. */
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/* Set tty state to our_ttystate. We don't change in our out of raw
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mode, to avoid flushing input. We need to do the same thing
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regardless of output_only, because we don't have separate
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terminal_is_ours and terminal_is_ours_for_output flags. It's OK,
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though, since readline will deal with raw mode when/if it needs to.
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*/
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SERIAL_NOFLUSH_SET_TTY_STATE (stdin_serial, our_ttystate,
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inferior_ttystate);
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#ifdef SIGTTOU
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if (job_control)
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signal (SIGTTOU, osigttou);
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#endif
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if (!job_control)
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{
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signal (SIGINT, sigint_ours);
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signal (SIGQUIT, sigquit_ours);
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}
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tflags_inferior = fcntl (0, F_GETFL, 0);
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result = ioctl (0, TIOCGETP, &sg_inferior);
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#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
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result = ioctl (0, TIOCGETC, &tc_inferior);
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#endif
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#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
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result = ioctl (0, TIOCGLTC, <c_inferior);
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#endif
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#ifdef TIOCLGET
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result = ioctl (0, TIOCLGET, &lmode_inferior);
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#endif
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/* Is there a reason this is being done twice? It happens both
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places we use F_SETFL, so I'm inclined to think perhaps there
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is some reason, however perverse. Perhaps not though... */
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result = fcntl (0, F_SETFL, tflags_ours);
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result = fcntl (0, F_SETFL, tflags_ours);
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result = result; /* lint */
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}
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#ifdef HAVE_TERMIO
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sg_ours.c_lflag |= ICANON;
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if (output_only && !(sg_inferior.c_lflag & ICANON))
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sg_ours.c_lflag &= ~ICANON;
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#else /* not HAVE_TERMIO */
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sg_ours.sg_flags &= ~RAW & ~CBREAK;
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if (output_only)
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sg_ours.sg_flags |= (RAW | CBREAK) & sg_inferior.sg_flags;
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#endif /* not HAVE_TERMIO */
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result = fcntl (0, F_SETFL, tflags_ours);
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result = fcntl (0, F_SETFL, tflags_ours);
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result = ioctl (0, TIOCSETN, &sg_ours);
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#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
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result = ioctl (0, TIOCSETC, &tc_ours);
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#endif
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#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
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result = ioctl (0, TIOCSLTC, <c_ours);
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#endif
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#ifdef TIOCLGET
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result = ioctl (0, TIOCLSET, &lmode_ours);
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#endif
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#ifdef HAVE_TERMIO
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sg_ours.c_lflag |= ICANON;
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#else /* not HAVE_TERMIO */
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sg_ours.sg_flags &= ~RAW & ~CBREAK;
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#endif /* not HAVE_TERMIO */
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result = result; /* lint */
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#endif
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}
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/* ARGSUSED */
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@ -305,58 +301,65 @@ child_terminal_info (args, from_tty)
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char *args;
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int from_tty;
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{
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register int i;
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if (!gdb_has_a_terminal ())
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{
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printf_filtered ("This GDB does not control a terminal.\n");
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return;
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}
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if (!gdb_has_a_terminal) {
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printf_filtered ("This GDB does not control a terminal.\n");
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return;
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}
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#if !defined(__GO32__)
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#ifdef TIOCGPGRP
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printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
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printf_filtered ("owner pgrp = %d, fcntl flags = 0x%x.\n",
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pgrp_inferior, tflags_inferior);
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#endif /* TIOCGPGRP */
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/* First the fcntl flags. */
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{
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int flags;
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flags = tflags_inferior;
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#ifdef HAVE_TERMIO
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printf_filtered ("File descriptor flags = ");
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printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
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sg_inferior.c_iflag, sg_inferior.c_oflag);
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printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
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sg_inferior.c_cflag, sg_inferior.c_lflag, sg_inferior.c_line);
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printf_filtered ("c_cc: ");
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for (i = 0; (i < NCC); i += 1)
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printf_filtered ("0x%x ", sg_inferior.c_cc[i]);
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printf_filtered ("\n");
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#ifndef O_ACCMODE
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#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
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#endif
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/* (O_ACCMODE) parens are to avoid Ultrix header file bug */
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switch (flags & (O_ACCMODE))
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{
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case O_RDONLY: printf_filtered ("O_RDONLY"); break;
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case O_WRONLY: printf_filtered ("O_WRONLY"); break;
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case O_RDWR: printf_filtered ("O_RDWR"); break;
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}
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flags &= ~(O_ACCMODE);
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#else /* not HAVE_TERMIO */
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printf_filtered ("sgttyb.sg_flags = 0x%x.\n", sg_inferior.sg_flags);
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#endif /* not HAVE_TERMIO */
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#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
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printf_filtered ("tchars: ");
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for (i = 0; i < (int)sizeof (struct tchars); i++)
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printf_filtered ("0x%x ", ((unsigned char *)&tc_inferior)[i]);
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printf_filtered ("\n");
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#ifdef O_NONBLOCK
|
||||
if (flags & O_NONBLOCK)
|
||||
printf_filtered (" | O_NONBLOCK");
|
||||
flags &= ~O_NONBLOCK;
|
||||
#endif
|
||||
|
||||
#if defined (O_NDELAY)
|
||||
/* If O_NDELAY and O_NONBLOCK are defined to the same thing, we will
|
||||
print it as O_NONBLOCK, which is good cause that is what POSIX
|
||||
has, and the flag will already be cleared by the time we get here. */
|
||||
if (flags & O_NDELAY)
|
||||
printf_filtered (" | O_NDELAY");
|
||||
flags &= ~O_NDELAY;
|
||||
#endif
|
||||
|
||||
#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
|
||||
printf_filtered ("ltchars: ");
|
||||
for (i = 0; i < (int)sizeof (struct ltchars); i++)
|
||||
printf_filtered ("0x%x ", ((unsigned char *)<c_inferior)[i]);
|
||||
printf_filtered ("\n");
|
||||
#endif
|
||||
|
||||
#ifdef TIOCLGET
|
||||
printf_filtered ("lmode: 0x%x\n", lmode_inferior);
|
||||
#endif
|
||||
#else
|
||||
printf_filtered("This is a DOS machine; there is no terminal state\n");
|
||||
if (flags & O_APPEND)
|
||||
printf_filtered (" | O_APPEND");
|
||||
flags &= ~O_APPEND;
|
||||
|
||||
#if defined (O_BINARY)
|
||||
if (flags & O_BINARY)
|
||||
printf_filtered (" | O_BINARY");
|
||||
flags &= ~O_BINARY;
|
||||
#endif
|
||||
|
||||
if (flags)
|
||||
printf_filtered (" | 0x%x", flags);
|
||||
printf_filtered ("\n");
|
||||
}
|
||||
|
||||
SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate);
|
||||
}
|
||||
|
||||
/* NEW_TTY_PREFORK is called before forking a new child process,
|
||||
@ -396,7 +399,7 @@ new_tty ()
|
||||
osigttou = (void (*)()) signal(SIGTTOU, SIG_IGN);
|
||||
ioctl(tty, TIOCNOTTY, 0);
|
||||
close(tty);
|
||||
(void) signal(SIGTTOU, osigttou);
|
||||
signal(SIGTTOU, osigttou);
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -422,7 +425,7 @@ new_tty ()
|
||||
{ close (2); dup (tty); }
|
||||
if (tty > 2)
|
||||
close(tty);
|
||||
#endif /* !go32*/o
|
||||
#endif /* !go32 */
|
||||
}
|
||||
|
||||
/* Kill the inferior process. Make us have no inferior. */
|
||||
@ -433,9 +436,10 @@ kill_command (arg, from_tty)
|
||||
char *arg;
|
||||
int from_tty;
|
||||
{
|
||||
/* Shouldn't this be target_has_execution? FIXME. */
|
||||
if (inferior_pid == 0)
|
||||
error ("The program is not being run.");
|
||||
if (!query ("Kill the inferior process? "))
|
||||
if (!query ("Kill the program being debugged? "))
|
||||
error ("Not confirmed.");
|
||||
target_kill ();
|
||||
|
||||
@ -478,101 +482,42 @@ generic_mourn_inferior ()
|
||||
from previous runs of the inferior. So clear them. */
|
||||
breakpoint_clear_ignore_counts ();
|
||||
}
|
||||
|
||||
void
|
||||
child_mourn_inferior ()
|
||||
{
|
||||
unpush_target (&child_ops);
|
||||
generic_mourn_inferior ();
|
||||
}
|
||||
|
||||
#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). */
|
||||
/* Call set_sigint_trap when you need to pass a signal on to an attached
|
||||
process when handling SIGINT */
|
||||
|
||||
/* ARGSUSED */
|
||||
static void
|
||||
try_writing_regs_command (arg, from_tty)
|
||||
char *arg;
|
||||
int from_tty;
|
||||
pass_signal (signo)
|
||||
int signo;
|
||||
{
|
||||
register int i;
|
||||
register int value;
|
||||
|
||||
if (inferior_pid == 0)
|
||||
error ("There is no inferior process now.");
|
||||
|
||||
/* 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, (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",
|
||||
i, value, value);
|
||||
}
|
||||
else if ((i & 0377) == 0)
|
||||
printf (" Failed at 0x%x.\n", i);
|
||||
}
|
||||
kill (inferior_pid, SIGINT);
|
||||
}
|
||||
|
||||
static void (*osig)();
|
||||
|
||||
void
|
||||
set_sigint_trap()
|
||||
{
|
||||
osig = (void (*) ()) signal (SIGINT, pass_signal);
|
||||
}
|
||||
|
||||
void
|
||||
clear_sigint_trap()
|
||||
{
|
||||
signal (SIGINT, osig);
|
||||
}
|
||||
#endif
|
||||
|
||||
void
|
||||
_initialize_inflow ()
|
||||
{
|
||||
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;
|
||||
|
||||
/* 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);
|
||||
#endif
|
||||
#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
|
||||
ioctl (0, TIOCGLTC, <c_ours);
|
||||
#endif
|
||||
#ifdef TIOCLGET
|
||||
ioctl (0, TIOCLGET, &lmode_ours);
|
||||
#endif
|
||||
#ifdef TIOCGPGRP
|
||||
ioctl (0, TIOCGPGRP, &pgrp_ours);
|
||||
#endif /* TIOCGPGRP */
|
||||
} else {
|
||||
gdb_has_a_terminal = 0;
|
||||
}
|
||||
#else
|
||||
gdb_has_a_terminal = 0;
|
||||
#endif
|
||||
|
||||
|
||||
terminal_is_ours = 1;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user