117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/* Fork a Unix child process, and set up to debug it, for GDBserver.
|
|
Copyright (C) 1989-2018 Free Software Foundation, Inc.
|
|
|
|
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 3 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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "server.h"
|
|
#include "job-control.h"
|
|
#include "nat/fork-inferior.h"
|
|
#ifdef HAVE_SIGNAL_H
|
|
#include <signal.h>
|
|
#endif
|
|
|
|
#ifdef SIGTTOU
|
|
/* A file descriptor for the controlling terminal. */
|
|
static int terminal_fd;
|
|
|
|
/* TERMINAL_FD's original foreground group. */
|
|
static pid_t old_foreground_pgrp;
|
|
|
|
/* Hand back terminal ownership to the original foreground group. */
|
|
|
|
static void
|
|
restore_old_foreground_pgrp (void)
|
|
{
|
|
tcsetpgrp (terminal_fd, old_foreground_pgrp);
|
|
}
|
|
#endif
|
|
|
|
/* See nat/fork-inferior.h. */
|
|
|
|
void
|
|
prefork_hook (const char *args)
|
|
{
|
|
if (debug_threads)
|
|
{
|
|
debug_printf ("args: %s\n", args);
|
|
debug_flush ();
|
|
}
|
|
|
|
#ifdef SIGTTOU
|
|
signal (SIGTTOU, SIG_DFL);
|
|
signal (SIGTTIN, SIG_DFL);
|
|
#endif
|
|
|
|
/* Clear this so the backend doesn't get confused, thinking
|
|
CONT_THREAD died, and it needs to resume all threads. */
|
|
cont_thread = null_ptid;
|
|
}
|
|
|
|
/* See nat/fork-inferior.h. */
|
|
|
|
void
|
|
postfork_hook (pid_t pid)
|
|
{
|
|
}
|
|
|
|
/* See nat/fork-inferior.h. */
|
|
|
|
void
|
|
postfork_child_hook ()
|
|
{
|
|
/* This is set to the result of setpgrp, which if vforked, will be
|
|
visible to you in the parent process. It's only used by humans
|
|
for debugging. */
|
|
static int debug_setpgrp = 657473;
|
|
|
|
debug_setpgrp = gdb_setpgid ();
|
|
if (debug_setpgrp == -1)
|
|
perror (_("setpgrp failed in child"));
|
|
}
|
|
|
|
/* See nat/fork-inferior.h. */
|
|
|
|
void
|
|
gdb_flush_out_err ()
|
|
{
|
|
fflush (stdout);
|
|
fflush (stderr);
|
|
}
|
|
|
|
/* See server.h. */
|
|
|
|
void
|
|
post_fork_inferior (int pid, const char *program)
|
|
{
|
|
#ifdef SIGTTOU
|
|
signal (SIGTTOU, SIG_IGN);
|
|
signal (SIGTTIN, SIG_IGN);
|
|
terminal_fd = fileno (stderr);
|
|
old_foreground_pgrp = tcgetpgrp (terminal_fd);
|
|
tcsetpgrp (terminal_fd, pid);
|
|
atexit (restore_old_foreground_pgrp);
|
|
#endif
|
|
|
|
startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED,
|
|
&last_status, &last_ptid);
|
|
current_thread->last_resume_kind = resume_stop;
|
|
current_thread->last_status = last_status;
|
|
signal_pid = pid;
|
|
target_post_create_inferior ();
|
|
fprintf (stderr, "Process %s created; pid = %d\n", program, pid);
|
|
fflush (stderr);
|
|
}
|