1 files changed, 98 insertions, 0 deletions
diff --git a/lib/libc/stdlib/set_constraint_handler_s.c b/lib/libc/stdlib/set_constraint_handler_s.c
new file mode 100644
index 000000000000..298c4d94a4b9
--- /dev/null
+++ b/lib/libc/stdlib/set_constraint_handler_s.c
@@ -0,0 +1,98 @@
+/*-
+ * Copyright (c) 2017 Juniper Networks.  All rights reserved.
+ *
+ * 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, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, 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 REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 "namespace.h"
+#include <sys/types.h>
+#include <machine/atomic.h>
+#include <errno.h>
+#include <pthread.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+
+/*
+ * Rationale recommends allocating new memory each time.
+ */
+static constraint_handler_t *_ch = NULL;
+static pthread_mutex_t ch_lock = PTHREAD_MUTEX_INITIALIZER;
+
+constraint_handler_t
+set_constraint_handler_s(constraint_handler_t handler)
+{
+	constraint_handler_t *new, *old, ret;
+
+	new = malloc(sizeof(constraint_handler_t));
+	if (new == NULL)
+		return (NULL);
+	*new = handler;
+	if (__isthreaded)
+		_pthread_mutex_lock(&ch_lock);
+	old = _ch;
+	_ch = new;
+	if (__isthreaded)
+		_pthread_mutex_unlock(&ch_lock);
+	if (old == NULL) {
+		ret = NULL;
+	} else {
+		ret = *old;
+		free(old);
+	}
+	return (ret);
+}
+
+void
+__throw_constraint_handler_s(const char * restrict msg, errno_t error)
+{
+	constraint_handler_t ch;
+
+	if (__isthreaded)
+		_pthread_mutex_lock(&ch_lock);
+	ch = _ch != NULL ? *_ch : NULL;
+	if (__isthreaded)
+		_pthread_mutex_unlock(&ch_lock);
+	if (ch != NULL)
+		ch(msg, NULL, error);
+}
+
+void
+abort_handler_s(const char * restrict msg, void * restrict ptr __unused,
+    errno_t error __unused)
+{
+	static const char ahs[] = "abort_handler_s : ";
+
+	(void) _write(STDERR_FILENO, ahs, sizeof(ahs) - 1);
+	(void) _write(STDERR_FILENO, msg, strlen(msg));
+	(void) _write(STDERR_FILENO, "\n", 1);
+	abort();
+}
+
+void
+ignore_handler_s(const char * restrict msg __unused,
+    void * restrict ptr __unused, errno_t error __unused)
+{
+}