1/* Copyright (C) 2002-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <limits.h>
21#include <signal.h>
22#include <sysdep.h>
23#include <nptl/pthreadP.h>
24
25
26int
27raise (int sig)
28{
29 struct pthread *pd = THREAD_SELF;
30 pid_t pid = THREAD_GETMEM (pd, pid);
31 pid_t selftid = THREAD_GETMEM (pd, tid);
32 if (selftid == 0)
33 {
34 /* This system call is not supposed to fail. */
35#ifdef INTERNAL_SYSCALL
36 INTERNAL_SYSCALL_DECL (err);
37 selftid = INTERNAL_SYSCALL (gettid, err, 0);
38#else
39 selftid = INLINE_SYSCALL (gettid, 0);
40#endif
41 THREAD_SETMEM (pd, tid, selftid);
42
43 /* We do not set the PID field in the TID here since we might be
44 called from a signal handler while the thread executes fork. */
45 pid = selftid;
46 }
47 else
48 /* raise is an async-safe function. It could be called while the
49 fork/vfork function temporarily invalidated the PID field. Adjust for
50 that. */
51 if (__glibc_unlikely (pid <= 0))
52 pid = (pid & INT_MAX) == 0 ? selftid : -pid;
53
54 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
55}
56libc_hidden_def (raise)
57weak_alias (raise, gsignal)
58