| /* Copyright (C) 2002-2014 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> |
| #include <kernel-features.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 (__builtin_expect (pid <= 0, 0)) |
| pid = (pid & INT_MAX) == 0 ? selftid : -pid; |
| |
| return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig); |
| } |
| libc_hidden_def (raise) |
| weak_alias (raise, gsignal) |