Commit | Line | Data |
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2090129c | 1 | /* Fork a Unix child process, and set up to debug it, for GDBserver. |
b811d2c2 | 2 | Copyright (C) 1989-2020 Free Software Foundation, Inc. |
2090129c SDJ |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include "server.h" | |
268a13a5 | 20 | #include "gdbsupport/job-control.h" |
2090129c | 21 | #include "nat/fork-inferior.h" |
9845682b SDJ |
22 | #ifdef HAVE_SIGNAL_H |
23 | #include <signal.h> | |
24 | #endif | |
2090129c SDJ |
25 | |
26 | #ifdef SIGTTOU | |
27 | /* A file descriptor for the controlling terminal. */ | |
28 | static int terminal_fd; | |
29 | ||
30 | /* TERMINAL_FD's original foreground group. */ | |
31 | static pid_t old_foreground_pgrp; | |
32 | ||
33 | /* Hand back terminal ownership to the original foreground group. */ | |
34 | ||
35 | static void | |
36 | restore_old_foreground_pgrp (void) | |
37 | { | |
38 | tcsetpgrp (terminal_fd, old_foreground_pgrp); | |
39 | } | |
40 | #endif | |
41 | ||
42 | /* See nat/fork-inferior.h. */ | |
43 | ||
44 | void | |
45 | prefork_hook (const char *args) | |
46 | { | |
c12a5089 | 47 | client_state &cs = get_client_state (); |
2090129c SDJ |
48 | if (debug_threads) |
49 | { | |
50 | debug_printf ("args: %s\n", args); | |
51 | debug_flush (); | |
52 | } | |
53 | ||
54 | #ifdef SIGTTOU | |
55 | signal (SIGTTOU, SIG_DFL); | |
56 | signal (SIGTTIN, SIG_DFL); | |
57 | #endif | |
58 | ||
59 | /* Clear this so the backend doesn't get confused, thinking | |
60 | CONT_THREAD died, and it needs to resume all threads. */ | |
c12a5089 | 61 | cs.cont_thread = null_ptid; |
2090129c SDJ |
62 | } |
63 | ||
64 | /* See nat/fork-inferior.h. */ | |
65 | ||
66 | void | |
67 | postfork_hook (pid_t pid) | |
68 | { | |
69 | } | |
70 | ||
71 | /* See nat/fork-inferior.h. */ | |
72 | ||
73 | void | |
74 | postfork_child_hook () | |
75 | { | |
76 | /* This is set to the result of setpgrp, which if vforked, will be | |
77 | visible to you in the parent process. It's only used by humans | |
78 | for debugging. */ | |
79 | static int debug_setpgrp = 657473; | |
80 | ||
81 | debug_setpgrp = gdb_setpgid (); | |
82 | if (debug_setpgrp == -1) | |
83 | perror (_("setpgrp failed in child")); | |
84 | } | |
85 | ||
86 | /* See nat/fork-inferior.h. */ | |
87 | ||
88 | void | |
89 | gdb_flush_out_err () | |
90 | { | |
91 | fflush (stdout); | |
92 | fflush (stderr); | |
93 | } | |
94 | ||
95 | /* See server.h. */ | |
96 | ||
97 | void | |
98 | post_fork_inferior (int pid, const char *program) | |
99 | { | |
c12a5089 | 100 | client_state &cs = get_client_state (); |
2090129c SDJ |
101 | #ifdef SIGTTOU |
102 | signal (SIGTTOU, SIG_IGN); | |
103 | signal (SIGTTIN, SIG_IGN); | |
104 | terminal_fd = fileno (stderr); | |
105 | old_foreground_pgrp = tcgetpgrp (terminal_fd); | |
106 | tcsetpgrp (terminal_fd, pid); | |
107 | atexit (restore_old_foreground_pgrp); | |
108 | #endif | |
109 | ||
5b6d1e4f PA |
110 | startup_inferior (the_target, pid, |
111 | START_INFERIOR_TRAPS_EXPECTED, | |
c12a5089 | 112 | &cs.last_status, &cs.last_ptid); |
2090129c | 113 | current_thread->last_resume_kind = resume_stop; |
c12a5089 | 114 | current_thread->last_status = cs.last_status; |
2090129c SDJ |
115 | signal_pid = pid; |
116 | target_post_create_inferior (); | |
117 | fprintf (stderr, "Process %s created; pid = %d\n", program, pid); | |
118 | fflush (stderr); | |
119 | } |