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authorRoland McGrath <roland@hack.frob.com>2014-07-07 09:28:38 -0700
committerRoland McGrath <roland@hack.frob.com>2014-07-07 09:28:38 -0700
commit08192659bbeae149e7cb1f4c43547257f7099bb0 (patch)
tree9f602a4e9f0aefdb06bc15a76be46e958e91a58f /sysdeps/unix/sysv/linux/raise.c
parentAdd comment for MEMCPY_OK_FOR_FWD_MEMMOVE (diff)
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Get rid of nptl/sysdeps/ entirely!
Diffstat (limited to 'sysdeps/unix/sysv/linux/raise.c')
-rw-r--r--sysdeps/unix/sysv/linux/raise.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/raise.c b/sysdeps/unix/sysv/linux/raise.c
new file mode 100644
index 0000000000..4106e8c458
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/raise.c
@@ -0,0 +1,58 @@
+/* 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>
+
+
+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)