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Diffstat (limited to 'gdb/RCS/inflow.c,v')
| -rw-r--r-- | gdb/RCS/inflow.c,v | 636 |
1 files changed, 0 insertions, 636 deletions
diff --git a/gdb/RCS/inflow.c,v b/gdb/RCS/inflow.c,v deleted file mode 100644 index 972b615..0000000 --- a/gdb/RCS/inflow.c,v +++ /dev/null @@ -1,636 +0,0 @@ -head 1.3; -access ; -symbols ; -locks ; strict; -comment @ * @; - - -1.3 -date 89.03.27.20.12.35; author gnu; state Exp; -branches ; -next 1.2; - -1.2 -date 89.02.09.23.23.40; author gnu; state Exp; -branches ; -next 1.1; - -1.1 -date 89.02.09.22.28.04; author gnu; state Exp; -branches ; -next ; - - -desc -@@ - - -1.3 -log -@General portability changes. Make various local terminal control -parameter processing #ifdef the particular IOCTL used to get them. -This handles various Sys V/Berkeley merges. Also avoid vfork -and <sys/fcntl.h>. -@ -text -@/* 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! -*/ -#include "defs.h" -#include "param.h" -#include "frame.h" -#include "inferior.h" - -#ifdef USG -#include <sys/types.h> -#include <fcntl.h> -#endif - -#include <stdio.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; - -#ifdef TIOCGETC -static struct tchars tc_inferior; -static struct tchars tc_ours; -#endif - -#ifdef TIOCGLTC -static struct ltchars ltc_inferior; -static struct ltchars ltc_ours; -#endif /* TIOCGLTC */ - -#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; - -#ifdef TIOCGETC - 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); -#ifdef TIOCGETC - ioctl (0, TIOCSETC, &tc_inferior); -#endif -#ifdef TIOCGLTC - ioctl (0, TIOCSLTC, <c_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 = 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); - -#ifdef TIOCGETC - ioctl (0, TIOCGETC, &tc_inferior); -#endif -#ifdef TIOCGLTC - ioctl (0, TIOCGLTC, <c_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); - -#ifdef TIOCGETC - 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 */ -} - -static void -term_status_command () -{ - register int i; - - if (remote_debugging) - { - printf ("No terminal status when remote debugging.\n"); - return; - } - - printf ("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", - tflags_inferior, sg_inferior.c_iflag, sg_inferior.c_oflag); - printf ("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: "); - for (i = 0; (i < NCC); i += 1) - printf ("0x%x ", sg_inferior.c_cc[i]); - printf ("\n"); - -#else /* not HAVE_TERMIO */ - - printf ("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: "); - for (i = 0; i < sizeof (struct tchars); i++) - printf ("0x%x ", ((char *)&tc_inferior)[i]); - printf ("\n"); -#endif - -#ifdef TIOCGLTC - printf ("ltchars: "); - for (i = 0; i < sizeof (struct ltchars); i++) - printf ("0x%x ", ((char *)<c_inferior)[i]); - printf ("\n"); - ioctl (0, TIOCSLTC, <c_ours); -#endif - -#ifdef TIOCLGET - printf ("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); - - dup2(tty, 0); - dup2(tty, 1); - dup2(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 (); - - pid = fork (); - if (pid < 0) - perror_with_name ("fork"); - - 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); - -/* 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); - } - 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 ())); -} - -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."); - - for (i = 0; ; 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); - } -} - -void -_initialize_inflow () -{ - add_com ("term-status", class_obscure, term_status_command, - "Print info on inferior's saved terminal status."); - - 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."); - - 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); - -#ifdef TIOCGETC - 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; -} - -@ - - -1.2 -log -@When the inferior process dies, deselect the current frame so that -the "where" ("backtrace") command will not think there's a stack. -@ -text -@d27 1 -a27 1 -#include <sys/fcntl.h> -a34 6 -/* May be unnecessary since many parts of inflow.c - have migrated to *-infdep.c */ -#ifdef USG -#include <sys/user.h> -#endif - -d73 1 -a73 1 -#ifdef TIOCGLTC -d76 3 -d81 3 -d86 1 -a86 1 -#endif /* TIOCGLTC */ -d117 4 -a121 1 - tc_inferior = tc_ours; -d123 3 -d127 1 -a127 1 -#endif /* TIOCGLTC */ -d150 3 -a153 1 - ioctl (0, TIOCSETC, &tc_inferior); -d155 2 -d158 1 -a158 1 -#endif /* TIOCGLTC */ -d228 3 -a231 1 - ioctl (0, TIOCGETC, &tc_inferior); -d233 2 -d236 1 -a236 1 -#endif /* TIOCGLTC */ -d253 3 -a256 1 - ioctl (0, TIOCSETC, &tc_ours); -d258 2 -d261 1 -a261 1 -#endif /* TIOCGLTC */ -d297 6 -a302 3 - printf ("fcntl flags = 0x%x, lmode = 0x%x,\nsgttyb.sg_flags = 0x%x, owner pid = %d.\n", - tflags_inferior, lmode_inferior, - sg_inferior.sg_flags, pgrp_inferior); -d307 3 -d314 2 -d317 3 -a319 1 -#endif /* not HAVE_TERMIO */ -d383 1 -a383 1 - pid = vfork (); -d385 1 -a385 1 - perror_with_name ("vfork"); -d497 3 -a500 1 - ioctl (0, TIOCGETC, &tc_ours); -d502 2 -d505 1 -a505 1 -#endif /* TIOCGLTC */ -@ - - -1.1 -log -@Initial revision -@ -text -@d418 1 -@ |