diff options
Diffstat (limited to 'gdb/inflow.c')
| -rw-r--r-- | gdb/inflow.c | 203 |
1 files changed, 112 insertions, 91 deletions
diff --git a/gdb/inflow.c b/gdb/inflow.c index 6ce7721..da25bd4 100644 --- a/gdb/inflow.c +++ b/gdb/inflow.c @@ -1,21 +1,22 @@ /* Low level interface to ptrace, for GDB when running under Unix. Copyright 1986-87, 1989, 1991-92, 1995, 1998 Free Software Foundation, Inc. -This file is part of GDB. + This file is part of GDB. -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 2 of the License, or -(at your option) any later version. + 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 2 of the License, or + (at your option) any later version. -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. + 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 this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ #include "defs.h" #include "frame.h" @@ -114,7 +115,11 @@ static char *inferior_thisrun_terminal; int terminal_is_ours; -enum {yes, no, have_not_checked} gdb_has_a_terminal_flag = have_not_checked; +enum + { + yes, no, have_not_checked + } +gdb_has_a_terminal_flag = have_not_checked; /* Does GDB have a terminal (on stdin)? */ int @@ -128,8 +133,8 @@ gdb_has_a_terminal () 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. */ + 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); @@ -182,7 +187,7 @@ terminal_init_inferior_with_pgrp (pgrp) 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). */ + a new function SERIAL_COPY_TTY_STATE). */ if (inferior_ttystate) free (inferior_ttystate); inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); @@ -192,8 +197,8 @@ terminal_init_inferior_with_pgrp (pgrp) #endif /* 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. */ + before the program runs, as it needs to be), we install the new + process group. */ terminal_is_ours = 1; } } @@ -225,38 +230,38 @@ terminal_inferior () #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... */ + 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 /* 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. */ + 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); OOPSY ("setting tty state"); if (!job_control) { - sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN); + sigint_ours = (void (*)()) signal (SIGINT, SIG_IGN); #ifdef SIGQUIT - sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN); + sigquit_ours = (void (*)()) signal (SIGQUIT, SIG_IGN); #endif } /* 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 the tty state, but ignore errors - setting the process group, which will happen if we are not - sharing a terminal). */ + 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 the tty state, but ignore errors + setting the process group, which will happen if we are not + sharing a terminal). */ if (job_control) { @@ -319,7 +324,7 @@ terminal_ours_1 (output_only) if (!terminal_is_ours) { /* Ignore this signal since it will happen when we try to set the - pgrp. */ + pgrp. */ void (*osigttou) (); int result; @@ -327,7 +332,7 @@ terminal_ours_1 (output_only) #ifdef SIGTTOU if (job_control) - osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN); + osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN); #endif if (inferior_ttystate) @@ -344,18 +349,18 @@ terminal_ours_1 (output_only) #endif /* 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. - FIXME-maybe: However, query() expects non-raw mode and doesn't - use readline. Maybe query should use readline (on the other hand, - this only matters for HAVE_SGTTY, not termio or termios, I think). */ + was an artifact from before when we used readline. Readline sets + the tty state when it needs to. + FIXME-maybe: However, query() expects non-raw mode and doesn't + use readline. Maybe query should use readline (on the other hand, + this only matters for HAVE_SGTTY, not termio or termios, I think). */ /* 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. - */ + 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); @@ -371,7 +376,7 @@ terminal_ours_1 (output_only) such situations as well. */ if (result == -1) fprintf_unfiltered (gdb_stderr, "[tcsetpgrp failed in terminal_ours: %s]\n", - strerror (errno)); + strerror (errno)); #endif #endif /* termios */ @@ -397,13 +402,13 @@ terminal_ours_1 (output_only) tflags_inferior = fcntl (0, F_GETFL, 0); /* 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... */ + 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 - result = result; /* lint */ + result = result; /* lint */ } } @@ -433,7 +438,7 @@ child_terminal_info (args, from_tty) /* First the fcntl flags. */ { int flags; - + flags = tflags_inferior; printf_filtered ("File descriptor flags = "); @@ -444,18 +449,24 @@ child_terminal_info (args, from_tty) /* (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; + 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); #ifdef O_NONBLOCK - if (flags & 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 @@ -517,41 +528,50 @@ new_tty () /* 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); + 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); + osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN); + ioctl (tty, TIOCNOTTY, 0); + close (tty); + signal (SIGTTOU, osigttou); } #endif /* Now open the specified new terminal. */ #ifdef USE_O_NOCTTY - tty = open(inferior_thisrun_terminal, O_RDWR | O_NOCTTY); + tty = open (inferior_thisrun_terminal, O_RDWR | O_NOCTTY); #else - tty = open(inferior_thisrun_terminal, O_RDWR); + tty = open (inferior_thisrun_terminal, O_RDWR); #endif if (tty == -1) { print_sys_errmsg (inferior_thisrun_terminal, errno); - _exit(1); + _exit (1); } /* Avoid use of dup2; doesn't exist on all systems. */ if (tty != 0) - { close (0); dup (tty); } + { + close (0); + dup (tty); + } if (tty != 1) - { close (1); dup (tty); } + { + close (1); + dup (tty); + } if (tty != 2) - { close (2); dup (tty); } + { + close (2); + dup (tty); + } if (tty > 2) - close(tty); -#endif /* !go32 && !win32*/ + close (tty); +#endif /* !go32 && !win32 */ } /* Kill the inferior process. Make us have no inferior. */ @@ -572,17 +592,18 @@ kill_command (arg, from_tty) error ("Not confirmed."); target_kill (); - init_thread_list(); /* Destroy thread info */ + init_thread_list (); /* Destroy thread info */ /* 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", target_longname); - if (selected_frame == NULL) - fputs_filtered ("No selected stack frame.\n", gdb_stdout); - else - print_stack_frame (selected_frame, selected_frame_level, 1); - } + if (target_has_stack) + { + printf_filtered ("In %s,\n", target_longname); + if (selected_frame == NULL) + fputs_filtered ("No selected stack frame.\n", gdb_stdout); + else + print_stack_frame (selected_frame, selected_frame_level, 1); + } } /* Call set_sigint_trap when you need to pass a signal on to an attached @@ -591,26 +612,26 @@ kill_command (arg, from_tty) /* ARGSUSED */ static void pass_signal (signo) - int signo; + int signo; { #ifndef _WIN32 kill (PIDGET (inferior_pid), SIGINT); #endif } -static void (*osig)(); +static void (*osig) (); void -set_sigint_trap() +set_sigint_trap () { if (attach_flag || inferior_thisrun_terminal) { - osig = (void (*) ()) signal (SIGINT, pass_signal); + osig = (void (*)()) signal (SIGINT, pass_signal); } } void -clear_sigint_trap() +clear_sigint_trap () { if (attach_flag || inferior_thisrun_terminal) { @@ -649,8 +670,8 @@ set_sigio_trap () { if (target_activity_function) { - old_sigio = (void (*) ()) signal (SIGIO, handle_sigio); - fcntl (target_activity_fd, F_SETOWN, getpid()); + old_sigio = (void (*)()) signal (SIGIO, handle_sigio); + fcntl (target_activity_fd, F_SETOWN, getpid ()); old_fcntl_flags = fcntl (target_activity_fd, F_GETFL, 0); fcntl (target_activity_fd, F_SETFL, old_fcntl_flags | FASYNC); } @@ -700,8 +721,8 @@ gdb_setpgid () { #if defined (NEED_POSIX_SETPGID) || (defined (HAVE_TERMIOS) && defined (HAVE_SETPGID)) /* setpgid (0, 0) is supposed to work and mean the same thing as - this, but on Ultrix 4.2A it fails with EPERM (and - setpgid (getpid (), getpid ()) succeeds). */ + this, but on Ultrix 4.2A it fails with EPERM (and + setpgid (getpid (), getpid ()) succeeds). */ retval = setpgid (getpid (), getpid ()); #else #if defined (TIOCGPGRP) @@ -720,7 +741,7 @@ void _initialize_inflow () { add_info ("terminal", term_info, - "Print inferior's saved terminal status."); + "Print inferior's saved terminal status."); add_com ("kill", class_run, kill_command, "Kill execution of program being debugged."); @@ -741,10 +762,10 @@ _initialize_inflow () #ifdef _SC_JOB_CONTROL job_control = sysconf (_SC_JOB_CONTROL); #else - job_control = 0; /* have to assume the worst */ -#endif /* _SC_JOB_CONTROL */ -#endif /* _POSIX_JOB_CONTROL */ -#endif /* HAVE_TERMIOS */ + job_control = 0; /* have to assume the worst */ +#endif /* _SC_JOB_CONTROL */ +#endif /* _POSIX_JOB_CONTROL */ +#endif /* HAVE_TERMIOS */ #ifdef HAVE_SGTTY #ifdef TIOCGPGRP |