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authorJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
committerJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
commit831c851165e112139af1265f294e198401814c1f (patch)
tree5f155fecb9b690be9c428e822d519c2710fefd47 /gdb/inflow.c
parent7a67dd45ca1c191a0220697a3ec9fa92993caf8c (diff)
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Initial revision
Diffstat (limited to 'gdb/inflow.c')
-rw-r--r--gdb/inflow.c549
1 files changed, 0 insertions, 549 deletions
diff --git a/gdb/inflow.c b/gdb/inflow.c
deleted file mode 100644
index 5062643..0000000
--- a/gdb/inflow.c
+++ /dev/null
@@ -1,549 +0,0 @@
-/* Low level interface to ptrace, for GDB when running under Unix.
- 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 <stdio.h>
-#include "defs.h"
-#include "param.h"
-#include "frame.h"
-#include "inferior.h"
-
-#ifdef USG
-#include <sys/types.h>
-#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>
-
-#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
-
-#ifdef SET_STACK_LIMIT_HUGE
-#include <sys/time.h>
-#include <sys/resource.h>
-extern int original_stack_limit;
-#endif /* SET_STACK_LIMIT_HUGE */
-
-extern int errno;
-
-/* Nonzero if we are debugging an attached outside process
- rather than an inferior. */
-
-int attach_flag;
-
-
-/* Record terminal status separately for debugger and inferior. */
-
-static TERMINAL sg_inferior;
-static TERMINAL sg_ours;
-
-static int tflags_inferior;
-static int tflags_ours;
-
-#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
-static struct tchars tc_inferior;
-static struct tchars tc_ours;
-#endif
-
-#ifdef TIOCGLTC
-static struct ltchars ltc_inferior;
-static struct ltchars ltc_ours;
-#endif
-
-#ifdef TIOCLGET
-static int lmode_inferior;
-static int lmode_ours;
-#endif
-
-#ifdef TIOCGPGRP
-static int pgrp_inferior;
-static int pgrp_ours;
-#else
-static int (*sigint_ours) ();
-static int (*sigquit_ours) ();
-#endif /* TIOCGPGRP */
-
-/* Copy of inferior_io_terminal when inferior was last started. */
-static char *inferior_thisrun_terminal;
-
-static void terminal_ours_1 ();
-
-/* Nonzero if our terminal settings are in effect.
- Zero if the inferior's settings are in effect. */
-static int terminal_is_ours;
-
-/* Initialize the terminal settings we record for the inferior,
- before we actually run the inferior. */
-
-void
-terminal_init_inferior ()
-{
- if (remote_debugging)
- return;
-
- sg_inferior = sg_ours;
- tflags_inferior = tflags_ours;
-
-#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- tc_inferior = tc_ours;
-#endif
-
-#ifdef TIOCGLTC
- ltc_inferior = ltc_ours;
-#endif
-
-#ifdef TIOCLGET
- lmode_inferior = lmode_ours;
-#endif
-
-#ifdef TIOCGPGRP
- pgrp_inferior = inferior_pid;
-#endif /* TIOCGPGRP */
-
- terminal_is_ours = 1;
-}
-
-/* Put the inferior's terminal settings into effect.
- This is preparation for starting or resuming the inferior. */
-
-void
-terminal_inferior ()
-{
- if (remote_debugging)
- return;
-
- if (terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
- {
- fcntl (0, F_SETFL, tflags_inferior);
- fcntl (0, F_SETFL, tflags_inferior);
- ioctl (0, TIOCSETN, &sg_inferior);
-
-#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCSETC, &tc_inferior);
-#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCSLTC, &ltc_inferior);
-#endif
-#ifdef TIOCLGET
- ioctl (0, TIOCLSET, &lmode_inferior);
-#endif
-
-#ifdef TIOCGPGRP
- ioctl (0, TIOCSPGRP, &pgrp_inferior);
-#else
- sigint_ours = (int (*) ()) signal (SIGINT, SIG_IGN);
- sigquit_ours = (int (*) ()) signal (SIGQUIT, SIG_IGN);
-#endif /* TIOCGPGRP */
- }
- terminal_is_ours = 0;
-}
-
-/* Put some of our terminal settings into effect,
- enough to get proper results from our output,
- but do not change into or out of RAW mode
- so that no input is discarded.
-
- After doing this, either terminal_ours or terminal_inferior
- should be called to get back to a normal state of affairs. */
-
-void
-terminal_ours_for_output ()
-{
- if (remote_debugging)
- return;
-
- terminal_ours_1 (1);
-}
-
-/* Put our terminal settings into effect.
- First record the inferior's terminal settings
- so they can be restored properly later. */
-
-void
-terminal_ours ()
-{
- if (remote_debugging)
- return;
-
- terminal_ours_1 (0);
-}
-
-static void
-terminal_ours_1 (output_only)
- int output_only;
-{
-#ifdef TIOCGPGRP
- /* Ignore this signal since it will happen when we try to set the pgrp. */
- int (*osigttou) ();
-#endif /* TIOCGPGRP */
-
- if (!terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
- {
- terminal_is_ours = 1;
-
-#ifdef TIOCGPGRP
- osigttou = (int (*) ()) signal (SIGTTOU, SIG_IGN);
-
- ioctl (0, TIOCGPGRP, &pgrp_inferior);
- ioctl (0, TIOCSPGRP, &pgrp_ours);
-
- signal (SIGTTOU, osigttou);
-#else
- signal (SIGINT, sigint_ours);
- signal (SIGQUIT, sigquit_ours);
-#endif /* TIOCGPGRP */
-
- tflags_inferior = fcntl (0, F_GETFL, 0);
- ioctl (0, TIOCGETP, &sg_inferior);
-
-#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCGETC, &tc_inferior);
-#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCGLTC, &ltc_inferior);
-#endif
-#ifdef TIOCLGET
- ioctl (0, TIOCLGET, &lmode_inferior);
-#endif
- }
-
-#ifdef HAVE_TERMIO
- sg_ours.c_lflag |= ICANON;
- if (output_only && !(sg_inferior.c_lflag & ICANON))
- sg_ours.c_lflag &= ~ICANON;
-#else /* not HAVE_TERMIO */
- sg_ours.sg_flags &= ~RAW & ~CBREAK;
- if (output_only)
- 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);
-
-#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCSETC, &tc_ours);
-#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCSLTC, &ltc_ours);
-#endif
-#ifdef TIOCLGET
- ioctl (0, TIOCLSET, &lmode_ours);
-#endif
-
-#ifdef HAVE_TERMIO
- sg_ours.c_lflag |= ICANON;
-#else /* not HAVE_TERMIO */
- sg_ours.sg_flags &= ~RAW & ~CBREAK;
-#endif /* not HAVE_TERMIO */
-}
-
-static void
-term_status_command ()
-{
- register int i;
-
- if (remote_debugging)
- {
- printf_filtered ("No terminal status when remote debugging.\n");
- return;
- }
-
- printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
-
-#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_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: ");
- for (i = 0; (i < NCC); i += 1)
- printf_filtered ("0x%x ", sg_inferior.c_cc[i]);
- printf_filtered ("\n");
-
-#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);
-
-#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]);
- printf_filtered ("\n");
-#endif
-
-#ifdef TIOCGLTC
- printf_filtered ("ltchars: ");
- for (i = 0; i < sizeof (struct ltchars); i++)
- printf_filtered ("0x%x ", ((char *)&ltc_inferior)[i]);
- printf_filtered ("\n");
- ioctl (0, TIOCSLTC, &ltc_ours);
-#endif
-
-#ifdef TIOCLGET
- printf_filtered ("lmode: %x\n", lmode_inferior);
-#endif
-}
-
-static void
-new_tty (ttyname)
- char *ttyname;
-{
- register int tty;
- register int fd;
-
-#ifdef TIOCNOTTY
- /* Disconnect the child process from our controlling terminal. */
- tty = open("/dev/tty", O_RDWR);
- if (tty > 0)
- {
- ioctl(tty, TIOCNOTTY, 0);
- close(tty);
- }
-#endif
-
- /* Now open the specified new terminal. */
-
- tty = open(ttyname, O_RDWR);
- if (tty == -1)
- _exit(1);
-
- /* 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.
- 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. */
-
-static void
-kill_command ()
-{
- 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 ();
-}
-
-void
-inferior_died ()
-{
- inferior_pid = 0;
- attach_flag = 0;
- mark_breakpoints_out ();
- 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);
-}
-
-#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). */
-static void
-try_writing_regs_command ()
-{
- register int i;
- register int value;
- extern int errno;
-
- 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, i, 0);
- call_ptrace (6, inferior_pid, 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);
- }
-}
-#endif
-
-void
-_initialize_inflow ()
-{
- add_com ("term-status", class_obscure, term_status_command,
- "Print info on 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);
-
-#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCGETC, &tc_ours);
-#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCGLTC, &ltc_ours);
-#endif
-#ifdef TIOCLGET
- ioctl (0, TIOCLGET, &lmode_ours);
-#endif
-
-#ifdef TIOCGPGRP
- ioctl (0, TIOCGPGRP, &pgrp_ours);
-#endif /* TIOCGPGRP */
-
- terminal_is_ours = 1;
-}
-