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-rw-r--r--gdb/inflow.c120
1 files changed, 70 insertions, 50 deletions
diff --git a/gdb/inflow.c b/gdb/inflow.c
index 19da996..c72b754 100644
--- a/gdb/inflow.c
+++ b/gdb/inflow.c
@@ -1,22 +1,22 @@
/* Low level interface to ptrace, for GDB when running under Unix.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+ Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB 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.
+
+GDB 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. */
+
#include "defs.h"
#include "param.h"
#include "frame.h"
@@ -70,7 +70,7 @@ static TERMINAL sg_ours;
static int tflags_inferior;
static int tflags_ours;
-#ifdef TIOCGETC
+#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
static struct tchars tc_inferior;
static struct tchars tc_ours;
#endif
@@ -78,7 +78,7 @@ static struct tchars tc_ours;
#ifdef TIOCGLTC
static struct ltchars ltc_inferior;
static struct ltchars ltc_ours;
-#endif /* TIOCGLTC */
+#endif
#ifdef TIOCLGET
static int lmode_inferior;
@@ -114,7 +114,7 @@ terminal_init_inferior ()
sg_inferior = sg_ours;
tflags_inferior = tflags_ours;
-#ifdef TIOCGETC
+#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
tc_inferior = tc_ours;
#endif
@@ -147,7 +147,8 @@ terminal_inferior ()
fcntl (0, F_SETFL, tflags_inferior);
fcntl (0, F_SETFL, tflags_inferior);
ioctl (0, TIOCSETN, &sg_inferior);
-#ifdef TIOCGETC
+
+#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
ioctl (0, TIOCSETC, &tc_inferior);
#endif
#ifdef TIOCGLTC
@@ -211,7 +212,7 @@ terminal_ours_1 (output_only)
terminal_is_ours = 1;
#ifdef TIOCGPGRP
- osigttou = signal (SIGTTOU, SIG_IGN);
+ osigttou = (int (*) ()) signal (SIGTTOU, SIG_IGN);
ioctl (0, TIOCGPGRP, &pgrp_inferior);
ioctl (0, TIOCSPGRP, &pgrp_ours);
@@ -225,7 +226,7 @@ terminal_ours_1 (output_only)
tflags_inferior = fcntl (0, F_GETFL, 0);
ioctl (0, TIOCGETP, &sg_inferior);
-#ifdef TIOCGETC
+#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
ioctl (0, TIOCGETC, &tc_inferior);
#endif
#ifdef TIOCGLTC
@@ -250,7 +251,7 @@ terminal_ours_1 (output_only)
fcntl (0, F_SETFL, tflags_ours);
ioctl (0, TIOCSETN, &sg_ours);
-#ifdef TIOCGETC
+#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
ioctl (0, TIOCSETC, &tc_ours);
#endif
#ifdef TIOCGLTC
@@ -260,7 +261,6 @@ terminal_ours_1 (output_only)
ioctl (0, TIOCLSET, &lmode_ours);
#endif
-
#ifdef HAVE_TERMIO
sg_ours.c_lflag |= ICANON;
#else /* not HAVE_TERMIO */
@@ -275,47 +275,47 @@ term_status_command ()
if (remote_debugging)
{
- printf ("No terminal status when remote debugging.\n");
+ printf_filtered ("No terminal status when remote debugging.\n");
return;
}
- printf ("Inferior's terminal status (currently saved by GDB):\n");
+ printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
#ifdef HAVE_TERMIO
- printf ("fcntl flags = 0x%x, c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ 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 ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
+ 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 ("c_cc: ");
+ printf_filtered ("c_cc: ");
for (i = 0; (i < NCC); i += 1)
- printf ("0x%x ", sg_inferior.c_cc[i]);
- printf ("\n");
+ printf_filtered ("0x%x ", sg_inferior.c_cc[i]);
+ printf_filtered ("\n");
#else /* not HAVE_TERMIO */
- printf ("fcntl flags = 0x%x, sgttyb.sg_flags = 0x%x, owner pid = %d.\n",
+ printf_filtered ("fcntl flags = 0x%x, sgttyb.sg_flags = 0x%x, owner pid = %d.\n",
tflags_inferior, sg_inferior.sg_flags, pgrp_inferior);
#endif /* not HAVE_TERMIO */
-#ifdef TIOCGETC
- printf ("tchars: ");
+#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
+ printf_filtered ("tchars: ");
for (i = 0; i < sizeof (struct tchars); i++)
- printf ("0x%x ", ((char *)&tc_inferior)[i]);
- printf ("\n");
+ printf_filtered ("0x%x ", ((char *)&tc_inferior)[i]);
+ printf_filtered ("\n");
#endif
#ifdef TIOCGLTC
- printf ("ltchars: ");
+ printf_filtered ("ltchars: ");
for (i = 0; i < sizeof (struct ltchars); i++)
- printf ("0x%x ", ((char *)&ltc_inferior)[i]);
- printf ("\n");
+ printf_filtered ("0x%x ", ((char *)&ltc_inferior)[i]);
+ printf_filtered ("\n");
ioctl (0, TIOCSLTC, &ltc_ours);
#endif
-
+
#ifdef TIOCLGET
- printf ("lmode: %x\n", lmode_inferior);
+ printf_filtered ("lmode: %x\n", lmode_inferior);
#endif
}
@@ -342,10 +342,15 @@ new_tty (ttyname)
if (tty == -1)
_exit(1);
- dup2(tty, 0);
- dup2(tty, 1);
- dup2(tty, 2);
- close(tty);
+ /* Avoid use of dup2; doesn't exist on all systems. */
+ if (tty != 0)
+ { close (0); dup (tty); }
+ if (tty != 1)
+ { close (1); dup (tty); }
+ if (tty != 2)
+ { close (2); dup (tty); }
+ if (tty > 2)
+ close(tty);
}
/* Start an inferior process and returns its pid.
@@ -380,9 +385,14 @@ create_inferior (allargs, env)
/* 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 ("fork");
+ perror_with_name ("vfork");
if (pid == 0)
{
@@ -407,6 +417,10 @@ create_inferior (allargs, env)
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);
@@ -420,6 +434,10 @@ create_inferior (allargs, env)
fflush (stderr);
_exit (0177);
}
+
+#ifdef CREATE_INFERIOR_HOOK
+ CREATE_INFERIOR_HOOK (pid);
+#endif
return pid;
}
@@ -443,11 +461,13 @@ inferior_died ()
inferior_pid = 0;
attach_flag = 0;
mark_breakpoints_out ();
- select_frame ( (FRAME) 0, -1);
+ select_frame ((FRAME) 0, -1);
reopen_exec_file ();
if (have_core_file_p ())
set_current_frame ( create_new_frame (read_register (FP_REGNUM),
read_pc ()));
+ else
+ set_current_frame (0);
}
static void
@@ -494,7 +514,7 @@ Report which ones can be written.");
ioctl (0, TIOCGETP, &sg_ours);
fcntl (0, F_GETFL, tflags_ours);
-#ifdef TIOCGETC
+#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
ioctl (0, TIOCGETC, &tc_ours);
#endif
#ifdef TIOCGLTC
generated by cgit v1.1 at 2024-11-24 15:55:35 +0000