X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Finflow.c;h=b4844662dd58b7754f455c241e9b9f37b9f83041;hb=cf3e377e61e7861677252feb4d06ba8fcea1e5c1;hp=3a1bdf2b3d274d4a30e2452c82c9586f058294a2;hpb=1c997a4ae86938343edb715efc3fc742c5f668fe;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/inflow.c b/gdb/inflow.c index 3a1bdf2b3d..b4844662dd 100644 --- a/gdb/inflow.c +++ b/gdb/inflow.c @@ -1,60 +1,46 @@ /* Low level interface to ptrace, for GDB when running under Unix. - Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. + Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc. This file is part of GDB. -GDB is free software; you can redistribute it and/or modify +This program 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. +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. -GDB is distributed in the hope that it will be useful, +This program 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. */ +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "defs.h" -#include "param.h" #include "frame.h" #include "inferior.h" +#include "command.h" +#include "signals.h" +#include "serial.h" +#include "target.h" #ifdef USG #include -#include #endif -#include +/* 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 + #include -#include #include -#ifdef HAVE_TERMIO -#include -#undef TIOCGETP -#define TIOCGETP TCGETA -#undef TIOCSETN -#define TIOCSETN TCSETA -#undef TIOCSETP -#define TIOCSETP TCSETAF -#define TERMINAL struct termio -#else -#include -#include -#include -#define TERMINAL struct sgttyb -#endif - -#ifdef SET_STACK_LIMIT_HUGE -#include -#include -extern int original_stack_limit; -#endif /* SET_STACK_LIMIT_HUGE */ +static void +kill_command PARAMS ((char *, int)); -extern int errno; +static void +terminal_ours_1 PARAMS ((int)); /* Nonzero if we are debugging an attached outside process rather than an inferior. */ @@ -64,73 +50,103 @@ int attach_flag; /* Record terminal status separately for debugger and inferior. */ -static TERMINAL sg_inferior; -static TERMINAL sg_ours; +static serial_t stdin_serial; -static int tflags_inferior; -static int tflags_ours; +/* TTY state for the inferior. We save it whenever the inferior stops, and + restore it when it resumes. */ +static serial_ttystate inferior_ttystate; -#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN) -static struct tchars tc_inferior; -static struct tchars tc_ours; -#endif +/* Our own tty state, which we restore every time we need to deal with the + terminal. We only set it once, when GDB first starts. The settings of + flags which readline saves and restores and unimportant. */ +static serial_ttystate our_ttystate; -#ifdef TIOCGLTC -static struct ltchars ltc_inferior; -static struct ltchars ltc_ours; -#endif +/* fcntl flags for us and the inferior. Saved and restored just like + {our,inferior}_ttystate. */ +static int tflags_inferior; +static int tflags_ours; -#ifdef TIOCLGET -static int lmode_inferior; -static int lmode_ours; -#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 + to SIG_IGN. */ +static void (*sigint_ours) (); +static void (*sigquit_ours) (); -#ifdef TIOCGPGRP -static int pgrp_inferior; -static int pgrp_ours; -#else -static int (*sigint_ours) (); -static int (*sigquit_ours) (); -#endif /* TIOCGPGRP */ +/* The name of the tty (from the `tty' command) that we gave to the inferior + when it was last started. */ -/* 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. Ignored if !gdb_has_a_terminal + (). */ -/* 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. */ +enum {yes, no, have_not_checked} gdb_has_a_terminal_flag = have_not_checked; -void -terminal_init_inferior () +/* Does GDB have a terminal (on stdin)? */ +int +gdb_has_a_terminal () { - if (remote_debugging) - return; + switch (gdb_has_a_terminal_flag) + { + case yes: + return 1; + case no: + return 0; + case have_not_checked: + /* Get all the current tty settings (including whether we have a tty at + 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 - sg_inferior = sg_ours; - tflags_inferior = tflags_ours; + 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; + } -#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN) - tc_inferior = tc_ours; -#endif + return gdb_has_a_terminal_flag == yes; + } +} -#ifdef TIOCGLTC - ltc_inferior = ltc_ours; -#endif +/* Macro for printing errors from ioctl operations */ -#ifdef TIOCLGET - lmode_inferior = lmode_ours; -#endif +#define OOPSY(what) \ + if (result == -1) \ + fprintf(stderr, "[%s failed in terminal_inferior: %s]\n", \ + what, strerror (errno)) -#ifdef TIOCGPGRP - pgrp_inferior = inferior_pid; -#endif /* TIOCGPGRP */ +static void terminal_ours_1 PARAMS ((int)); - terminal_is_ours = 1; +/* Initialize the terminal settings we record for the inferior, + before we actually run the inferior. */ + +void +terminal_init_inferior () +{ + 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); + 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; + } } /* Put the inferior's terminal settings into effect. @@ -139,31 +155,45 @@ terminal_init_inferior () void terminal_inferior () { - if (remote_debugging) - return; - - if (terminal_is_ours) /* && inferior_thisrun_terminal == 0) */ + if (gdb_has_a_terminal () && 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, <c_inferior); -#endif -#ifdef TIOCLGET - ioctl (0, TIOCLSET, &lmode_inferior); + 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 -#ifdef TIOCGPGRP - ioctl (0, TIOCSPGRP, &pgrp_inferior); -#else - sigint_ours = (int (*) ()) signal (SIGINT, SIG_IGN); - sigquit_ours = (int (*) ()) signal (SIGQUIT, SIG_IGN); -#endif /* TIOCGPGRP */ + /* 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); + + /* If attach_flag is set, we don't know whether we are sharing a + terminal with the inferior or not. (attaching a process + without a terminal is one case where we do not; attaching a + process which we ran from the same shell as GDB via `&' is + one case where we do, I think (but perhaps this is not + `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). */ + + if (!attach_flag) + OOPSY ("setting tty state"); + + if (!job_control) + { + sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN); + sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN); + } } terminal_is_ours = 0; } @@ -179,9 +209,6 @@ terminal_inferior () void terminal_ours_for_output () { - if (remote_debugging) - return; - terminal_ours_1 (1); } @@ -192,155 +219,210 @@ terminal_ours_for_output () void terminal_ours () { - if (remote_debugging) - return; - terminal_ours_1 (0); } +/* output_only is not used, and should not be used unless we introduce + separate terminal_is_ours and terminal_is_ours_for_output + flags. */ + 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 */ + /* Checking inferior_thisrun_terminal is necessary so that + if GDB is running in the background, it won't block trying + to do the ioctl()'s below. Checking gdb_has_a_terminal + avoids attempting all the ioctl's when running in batch. */ + if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal () == 0) + return; - if (!terminal_is_ours) /* && inferior_thisrun_terminal == 0) */ + if (!terminal_is_ours) { + /* Ignore this signal since it will happen when we try to set the + pgrp. */ + void (*osigttou) (); + int result; + terminal_is_ours = 1; -#ifdef TIOCGPGRP - osigttou = (int (*) ()) signal (SIGTTOU, SIG_IGN); +#ifdef SIGTTOU + if (job_control) + osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN); +#endif - ioctl (0, TIOCGPGRP, &pgrp_inferior); - ioctl (0, TIOCSPGRP, &pgrp_ours); + if (inferior_ttystate) + free (inferior_ttystate); + inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); + + /* 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. */ + + /* 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 + regardless of output_only, because we don't have separate + 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); + +#ifdef SIGTTOU + if (job_control) + signal (SIGTTOU, osigttou); +#endif - signal (SIGTTOU, osigttou); -#else - signal (SIGINT, sigint_ours); - signal (SIGQUIT, sigquit_ours); -#endif /* TIOCGPGRP */ + if (!job_control) + { + signal (SIGINT, sigint_ours); + signal (SIGQUIT, sigquit_ours); + } +#ifdef F_GETFL 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, <c_inferior); + /* 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_ours); + result = fcntl (0, F_SETFL, tflags_ours); #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, <c_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 */ + result = result; /* lint */ + } } -static void -term_status_command () +/* ARGSUSED */ +void +term_info (arg, from_tty) + char *arg; + int from_tty; { - register int i; + target_terminal_info (arg, from_tty); +} - if (remote_debugging) +/* ARGSUSED */ +void +child_terminal_info (args, from_tty) + char *args; + int from_tty; +{ + if (!gdb_has_a_terminal ()) { - printf_filtered ("No terminal status when remote debugging.\n"); + printf_filtered ("This GDB does not control a terminal.\n"); return; } printf_filtered ("Inferior's terminal status (currently saved by GDB):\n"); -#ifdef HAVE_TERMIO + /* First the fcntl flags. */ + { + int flags; + + flags = tflags_inferior; - 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"); + printf_filtered ("File descriptor flags = "); -#else /* not HAVE_TERMIO */ +#ifndef O_ACCMODE +#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR) +#endif + /* (O_ACCMODE) parens are to avoid Ultrix header file bug */ + switch (flags & (O_ACCMODE)) + { + case O_RDONLY: printf_filtered ("O_RDONLY"); break; + case O_WRONLY: printf_filtered ("O_WRONLY"); break; + case O_RDWR: printf_filtered ("O_RDWR"); break; + } + flags &= ~(O_ACCMODE); - printf_filtered ("fcntl flags = 0x%x, sgttyb.sg_flags = 0x%x, owner pid = %d.\n", - tflags_inferior, sg_inferior.sg_flags, pgrp_inferior); +#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 -#endif /* not HAVE_TERMIO */ + if (flags & O_APPEND) + printf_filtered (" | O_APPEND"); + flags &= ~O_APPEND; -#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"); +#if defined (O_BINARY) + if (flags & O_BINARY) + printf_filtered (" | O_BINARY"); + flags &= ~O_BINARY; #endif -#ifdef TIOCGLTC - printf_filtered ("ltchars: "); - for (i = 0; i < sizeof (struct ltchars); i++) - printf_filtered ("0x%x ", ((char *)<c_inferior)[i]); - printf_filtered ("\n"); - ioctl (0, TIOCSLTC, <c_ours); -#endif - -#ifdef TIOCLGET - printf_filtered ("lmode: %x\n", lmode_inferior); -#endif + if (flags) + printf_filtered (" | 0x%x", flags); + printf_filtered ("\n"); + } + + SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate); } -static void -new_tty (ttyname) +/* NEW_TTY_PREFORK is called before forking a new child process, + so we can record the state of ttys in the child to be formed. + TTYNAME is null if we are to share the terminal with gdb; + or points to a string containing the name of the desired tty. + + NEW_TTY is called in new child processes under Unix, which will + become debugger target processes. This actually switches to + the terminal specified in the NEW_TTY_PREFORK call. */ + +void +new_tty_prefork (ttyname) char *ttyname; +{ + /* Save the name for later, for determining whether we and the child + are sharing a tty. */ + inferior_thisrun_terminal = ttyname; +} + +void +new_tty () { register int tty; - register int fd; + if (inferior_thisrun_terminal == 0) + return; +#if !defined(__GO32__) #ifdef TIOCNOTTY - /* Disconnect the child process from our controlling terminal. */ + /* Disconnect the child process from our controlling terminal. On some + systems (SVR4 for example), this may cause a SIGTTOU, so temporarily + ignore SIGTTOU. */ tty = open("/dev/tty", O_RDWR); if (tty > 0) { + void (*osigttou) (); + + osigttou = (void (*)()) signal(SIGTTOU, SIG_IGN); ioctl(tty, TIOCNOTTY, 0); close(tty); + signal(SIGTTOU, osigttou); } #endif /* Now open the specified new terminal. */ - tty = open(ttyname, O_RDWR); +#ifdef USE_O_NOCTTY + tty = open(inferior_thisrun_terminal, O_RDWR | O_NOCTTY); +#else + tty = open(inferior_thisrun_terminal, O_RDWR); +#endif if (tty == -1) - _exit(1); + { + print_sys_errmsg (inferior_thisrun_terminal, errno); + _exit(1); + } /* Avoid use of dup2; doesn't exist on all systems. */ if (tty != 0) @@ -351,196 +433,93 @@ new_tty (ttyname) { close (2); dup (tty); } if (tty > 2) close(tty); +#endif /* !go32 */ } -/* 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. */ +/* ARGSUSED */ static void -kill_command () +kill_command (arg, from_tty) + char *arg; + int from_tty; { - if (remote_debugging) - return; + /* 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."); - kill_inferior (); + target_kill (); + + /* 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); + if (selected_frame == NULL) + fputs_filtered ("No selected stack frame.\n", stdout); + else + print_stack_frame (selected_frame, selected_frame_level, 1); + } } +/* The inferior process has died. Long live the inferior! */ + void -inferior_died () +generic_mourn_inferior () { inferior_pid = 0; attach_flag = 0; - mark_breakpoints_out (); - select_frame ((FRAME) 0, -1); + breakpoint_init_inferior (); + registers_changed (); + +#ifdef CLEAR_DEFERRED_STORES + /* Delete any pending stores to the inferior... */ + CLEAR_DEFERRED_STORES; +#endif + 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); + 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 (); } -#if 0 -/* This function is just for testing, and on some systems (Sony NewsOS - 3.2) also includes 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 () +pass_signal (signo) + int signo; { - register int i; - register int value; - extern int errno; + kill (inferior_pid, SIGINT); +} - 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); - } +static void (*osig)(); + +void +set_sigint_trap() +{ + osig = (void (*) ()) signal (SIGINT, pass_signal); +} + +void +clear_sigint_trap() +{ + signal (SIGINT, osig); } -#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_info ("terminal", term_info, + "Print inferior's saved terminal status."); 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, <c_ours); -#endif -#ifdef TIOCLGET - ioctl (0, TIOCLGET, &lmode_ours); -#endif - -#ifdef TIOCGPGRP - ioctl (0, TIOCGPGRP, &pgrp_ours); -#endif /* TIOCGPGRP */ - terminal_is_ours = 1; } -