diff options
Diffstat (limited to 'gdb/fork-child.c')
| -rw-r--r-- | gdb/fork-child.c | 81 |
1 files changed, 41 insertions, 40 deletions
diff --git a/gdb/fork-child.c b/gdb/fork-child.c index 7fa4a0bed78..754367b705e 100644 --- a/gdb/fork-child.c +++ b/gdb/fork-child.c @@ -2,21 +2,22 @@ Copyright 1990, 91, 92, 93, 94, 1996, 1999 Free Software Foundation, Inc. Contributed by Cygnus Support. -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 "gdb_string.h" @@ -144,7 +145,7 @@ fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, /* Multiplying the length of exec_file by 4 is to account for the fact that it may expand when quoted; it is a worst-case number based on every character being '. */ - len = 5 + 4 * strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop*/ 12; + len = 5 + 4 * strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop */ 12; /* If desired, concat something onto the front of ALLARGS. SHELL_COMMAND is the result. */ #ifdef SHELL_COMMAND_CONCAT @@ -177,8 +178,8 @@ fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, strcat (shell_command, "exec "); /* Quoting in this style is said to work with all shells. But csh - on IRIX 4.0.1 can't deal with it. So we only quote it if we need - to. */ + on IRIX 4.0.1 can't deal with it. So we only quote it if we need + to. */ p = exec_file; while (1) { @@ -250,7 +251,7 @@ fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, gdb_flush (gdb_stderr); /* If there's any initialization of the target layers that must happen - to prepare to handle the child we're about fork, do it now... + to prepare to handle the child we're about fork, do it now... */ if (pre_trace_fun != NULL) (*pre_trace_fun) (); @@ -278,15 +279,15 @@ fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, perror ("setpgrp failed in child"); /* Ask the tty subsystem to switch to the one we specified earlier - (or to share the current terminal, if none was specified). */ + (or to share the current terminal, if none was specified). */ new_tty (); /* Changing the signal handlers for the inferior after - a vfork can also change them for the superior, so we don't mess - with signals here. See comments in - initialize_signals for how we get the right signal handlers - for the inferior. */ + a vfork can also change them for the superior, so we don't mess + with signals here. See comments in + initialize_signals for how we get the right signal handlers + for the inferior. */ /* "Trace me, Dr. Memory!" */ (*traceme_fun) (); @@ -300,10 +301,10 @@ fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, */ /* There is no execlpe call, so we have to set the environment - for our child in the global variable. If we've vforked, this - clobbers the parent, but environ is restored a few lines down - in the parent. By the way, yes we do need to look down the - path to find $SHELL. Rich Pixley says so, and I agree. */ + for our child in the global variable. If we've vforked, this + clobbers the parent, but environ is restored a few lines down + in the parent. By the way, yes we do need to look down the + path to find $SHELL. Rich Pixley says so, and I agree. */ environ = env; /* If we decided above to start up with a shell, @@ -346,8 +347,8 @@ fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, } fprintf_unfiltered (gdb_stderr, ".\n"); /* This extra info seems to be useless - fprintf_unfiltered (gdb_stderr, "Got error %s.\n", errstring); - */ + fprintf_unfiltered (gdb_stderr, "Got error %s.\n", errstring); + */ gdb_flush (gdb_stderr); _exit (0177); } @@ -387,7 +388,7 @@ fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, Also, the original debugger will set FOLLOWED_CHILD FALSE, while the clone will set it TRUE. - */ + */ void clone_and_follow_inferior (child_pid, followed_child) int child_pid; @@ -405,7 +406,7 @@ clone_and_follow_inferior (child_pid, followed_child) this way because on some targets, only one process at a time can trace another. Thus, the original debugger must relinquish its tracing rights before the clone can pick them up.) - */ + */ #define SEM_TALK (1) #define SEM_LISTEN (0) int handoff_semaphore[2]; /* Original "talks" to [1], clone "listens" to [0] */ @@ -423,7 +424,7 @@ clone_and_follow_inferior (child_pid, followed_child) gdb_flush (gdb_stderr); /* Open the semaphore pipes. - */ + */ status = pipe (handoff_semaphore); if (status < 0) error ("error getting pipe for handoff semaphore"); @@ -442,14 +443,14 @@ clone_and_follow_inferior (child_pid, followed_child) perror_with_name ("fork"); /* Are we the original debugger? If so, we must relinquish all claims - to CHILD_PID. */ + to CHILD_PID. */ if (debugger_pid != 0) { - char signal_spelling[100];/* Arbitrary but sufficient length */ + char signal_spelling[100]; /* Arbitrary but sufficient length */ /* Detach from CHILD_PID. Deliver a "stop" signal when we do, though, - so that it remains stopped until the clone debugger can attach - to it. + so that it remains stopped until the clone debugger can attach + to it. */ detach_breakpoints (child_pid); @@ -475,7 +476,7 @@ clone_and_follow_inferior (child_pid, followed_child) Wait until the original debugger relinquishes control of CHILD_PID, though. - */ + */ read (handoff_semaphore[SEM_LISTEN], &listen_value, sizeof (listen_value)); /* Note that we DON'T want to actually detach from inferior_pid, @@ -483,7 +484,7 @@ clone_and_follow_inferior (child_pid, followed_child) debugger wants to retain control of the process. So, we just reset inferior_pid to CHILD_PID, and then ensure that all breakpoints are really set in CHILD_PID. - */ + */ target_mourn_inferior (); /* Ask the tty subsystem to switch to the one we specified earlier @@ -499,7 +500,7 @@ clone_and_follow_inferior (child_pid, followed_child) of attaching can behave differently on some targets than the standard method, where a process formerly not under debugger control was suddenly attached to..) - */ + */ target_post_follow_inferior_by_clone (); *followed_child = 1; @@ -555,11 +556,11 @@ startup_inferior (ntraps) if (!terminal_initted) { /* Now that the child has exec'd we know it has already set its - process group. On POSIX systems, tcsetpgrp will fail with - EPERM if we try it before the child's setpgid. */ + process group. On POSIX systems, tcsetpgrp will fail with + EPERM if we try it before the child's setpgid. */ /* Set up the "saved terminal modes" of the inferior - based on what modes we are starting it with. */ + based on what modes we are starting it with. */ target_terminal_init (); /* Install inferior's terminal modes. */ |