MFC r281712:

Make wait6(2), waitid(3) and ppoll(2) cancellation points.

4 files changed, 107 insertions, 0 deletions

diff --git a/lib/libc/sys/Makefile.inc b/lib/libc/sys/Makefile.inc
index 75e41be..fbd28cd 100644
--- a/lib/libc/sys/Makefile.inc
+++ b/lib/libc/sys/Makefile.inc
@@ -53,6 +53,7 @@ INTERPOSED = \
 	open \
 	openat \
 	poll \
+	ppoll \
 	pselect \
 	read \
 	readv \
@@ -69,6 +70,7 @@ INTERPOSED = \
 	sigwaitinfo \
 	swapcontext \
 	wait4 \
+	wait6 \
 	write \
 	writev
 
diff --git a/lib/libc/sys/interposing_table.c b/lib/libc/sys/interposing_table.c
index 4290bc6..c4d1429 100644
--- a/lib/libc/sys/interposing_table.c
+++ b/lib/libc/sys/interposing_table.c
@@ -76,6 +76,8 @@ interpos_func_t __libc_interposing[INTERPOS_MAX] = {
 	SLOT(spinlock, __libc_spinlock_stub),
 	SLOT(spinunlock, __libc_spinunlock_stub),
 	SLOT(kevent, __sys_kevent),
+	SLOT(wait6, __sys_wait6),
+	SLOT(ppoll, __sys_ppoll),
 };
 #undef SLOT
 
diff --git a/lib/libc/sys/ppoll.c b/lib/libc/sys/ppoll.c
new file mode 100644
index 0000000..f62fd19
--- /dev/null
+++ b/lib/libc/sys/ppoll.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2015 The FreeBSD Foundation.
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice(s), this list of conditions and the following disclaimer as
+ *    the first lines of this file unmodified other than the possible
+ *    addition of one or more copyright notices.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice(s), this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/poll.h>
+#include "libc_private.h"
+
+__weak_reference(__sys_ppoll, __ppoll);
+
+#pragma weak ppoll
+int
+ppoll(struct pollfd pfd[], nfds_t nfds, const struct timespec *__restrict
+    timeout, const sigset_t *__restrict newsigmask)
+{
+
+	return (((int (*)(struct pollfd *, nfds_t, const struct timespec *,
+	    const sigset_t *)) __libc_interposing[INTERPOS_ppoll])(pfd, nfds,
+	    timeout, newsigmask));
+}
diff --git a/lib/libc/sys/wait6.c b/lib/libc/sys/wait6.c
new file mode 100644
index 0000000..d280a76
--- /dev/null
+++ b/lib/libc/sys/wait6.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2015 The FreeBSD Foundation.
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice(s), this list of conditions and the following disclaimer as
+ *    the first lines of this file unmodified other than the possible
+ *    addition of one or more copyright notices.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice(s), this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include "libc_private.h"
+
+__weak_reference(__sys_wait6, __wait6);
+
+#pragma weak wait6
+pid_t
+wait6(idtype_t idtype, id_t id, int *status, int options, struct __wrusage *ru,
+    siginfo_t *infop)
+{
+
+	return (((pid_t (*)(idtype_t, id_t, int *, int, struct __wrusage *,
+	    siginfo_t *))__libc_interposing[INTERPOS_wait6])(idtype, id,
+	    status, options, ru, infop));
+}