1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* Copyright (C) 2002-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <sysdep.h>
#include <nptl/pthreadP.h>
int
raise (sig)
int sig;
{
struct pthread *pd = THREAD_SELF;
pid_t pid = THREAD_GETMEM (pd, pid);
pid_t selftid = THREAD_GETMEM (pd, tid);
if (selftid == 0)
{
/* This system call is not supposed to fail. */
#ifdef INTERNAL_SYSCALL
INTERNAL_SYSCALL_DECL (err);
selftid = INTERNAL_SYSCALL (gettid, err, 0);
#else
selftid = INLINE_SYSCALL (gettid, 0);
#endif
THREAD_SETMEM (pd, tid, selftid);
/* We do not set the PID field in the TID here since we might be
called from a signal handler while the thread executes fork. */
pid = selftid;
}
else
/* raise is an async-safe function. It could be called while the
fork/vfork function temporarily invalidated the PID field. Adjust for
that. */
if (__glibc_unlikely (pid <= 0))
pid = (pid & INT_MAX) == 0 ? selftid : -pid;
return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
}
libc_hidden_def (raise)
weak_alias (raise, gsignal)
|
