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https://sourceware.org/git/binutils-gdb.git
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c058728c31
Add the threads_debug_printf and THREADS_SCOPED_DEBUG_ENTER_EXIT, which use the logging infrastructure from gdbsupport/common-debug.h. Replace all debug_print uses that are predicated by debug_threads with threads_dethreads_debug_printf. Replace uses of the debug_enter and debug_exit macros with THREADS_SCOPED_DEBUG_ENTER_EXIT, which serves essentially the same purpose, but allows showing what comes between the enter and the exit in an indented form. Note that "threads" debug is currently used for a bit of everything in GDBserver, not only threads related stuff. It should ideally be cleaned up and separated logically as is done in GDB, but that's out of the scope of this patch. Change-Id: I2d4546464462cb4c16f7f1168c5cec5a89f2289a
116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
/* Fork a Unix child process, and set up to debug it, for GDBserver.
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Copyright (C) 1989-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "gdbsupport/job-control.h"
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#include "nat/fork-inferior.h"
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#ifdef HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#ifdef SIGTTOU
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/* A file descriptor for the controlling terminal. */
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static int terminal_fd;
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/* TERMINAL_FD's original foreground group. */
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static pid_t old_foreground_pgrp;
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/* Hand back terminal ownership to the original foreground group. */
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static void
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restore_old_foreground_pgrp (void)
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{
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tcsetpgrp (terminal_fd, old_foreground_pgrp);
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}
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#endif
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/* See nat/fork-inferior.h. */
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void
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prefork_hook (const char *args)
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{
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client_state &cs = get_client_state ();
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threads_debug_printf ("args: %s", args);
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#ifdef SIGTTOU
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signal (SIGTTOU, SIG_DFL);
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signal (SIGTTIN, SIG_DFL);
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#endif
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/* Clear this so the backend doesn't get confused, thinking
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CONT_THREAD died, and it needs to resume all threads. */
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cs.cont_thread = null_ptid;
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}
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/* See nat/fork-inferior.h. */
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void
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postfork_hook (pid_t pid)
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{
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}
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/* See nat/fork-inferior.h. */
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void
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postfork_child_hook ()
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{
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/* This is set to the result of setpgrp, which if vforked, will be
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visible to you in the parent process. It's only used by humans
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for debugging. */
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static int debug_setpgrp = 657473;
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debug_setpgrp = gdb_setpgid ();
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if (debug_setpgrp == -1)
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perror (_("setpgrp failed in child"));
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}
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/* See nat/fork-inferior.h. */
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void
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gdb_flush_out_err ()
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{
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fflush (stdout);
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fflush (stderr);
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}
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/* See server.h. */
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void
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post_fork_inferior (int pid, const char *program)
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{
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client_state &cs = get_client_state ();
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#ifdef SIGTTOU
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signal (SIGTTOU, SIG_IGN);
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signal (SIGTTIN, SIG_IGN);
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terminal_fd = fileno (stderr);
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old_foreground_pgrp = tcgetpgrp (terminal_fd);
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tcsetpgrp (terminal_fd, pid);
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atexit (restore_old_foreground_pgrp);
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#endif
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startup_inferior (the_target, pid,
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START_INFERIOR_TRAPS_EXPECTED,
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&cs.last_status, &cs.last_ptid);
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current_thread->last_resume_kind = resume_stop;
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current_thread->last_status = cs.last_status;
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signal_pid = pid;
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target_post_create_inferior ();
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fprintf (stderr, "Process %s created; pid = %d\n", program, pid);
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fflush (stderr);
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}
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