--- /dev/null
+++ Libc/Libc-1725.0.11/libdarwin/exception.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2018 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+#include "internal.h"
+
+#pragma mark Assertions
+static_assert(_OS_CRASH_LAST < OS_CRASH_PORT_ARRAY_COUNT,
+		"array not large enough");
+
+#pragma mark Private Utilities
+static thread_state_flavor_t
+_exception_thread_state_flavor(void)
+{
+	thread_state_flavor_t flavor = 0;
+#if defined(__i386__) || defined(__x86_64__)
+	flavor = x86_THREAD_STATE;
+#elif defined(__arm__) || defined(__arm64__)
+	flavor = ARM_THREAD_STATE;
+#else // defined(__i386__) || defined(__x86_64__)
+#error "unsupported architecture"
+#endif // defined(__i386__) || defined(__x86_64__)
+	return flavor;
+}
+
+static exception_mask_t
+_exception_mask(os_crash_flags_t flags)
+{
+	exception_mask_t mask = 0;
+	if (flags & OS_CRASH_FLAG_CRASH) {
+		mask |= EXC_MASK_CRASH;
+	}
+	if (flags & OS_CRASH_FLAG_GUARD) {
+		mask |= EXC_MASK_GUARD;
+	}
+	if (flags & OS_CRASH_FLAG_RESOURCE) {
+		mask |= EXC_MASK_RESOURCE;
+	}
+	if (flags & OS_CRASH_FLAG_CORPSE) {
+		mask |= EXC_MASK_CORPSE_NOTIFY;
+		mask &= (exception_mask_t)(~EXC_MASK_CRASH);
+	}
+	return mask;
+}
+
+static exception_behavior_t
+_exception_behavior(void)
+{
+	return (EXCEPTION_STATE_IDENTITY|MACH_EXCEPTION_CODES);
+}
+
+static void
+_os_exception_port_set(os_crash_port_t *ep,
+		os_crash_type_t type, mach_port_t p)
+{
+	kern_return_t kr = KERN_FAILURE;
+
+	ep->oep_type = type;
+	ep->oep_port = p;
+
+	kr = mach_port_mod_refs(mach_task_self(), p, MACH_PORT_RIGHT_SEND, 1);
+	if (kr == KERN_SUCCESS) {
+		ep->oep_port = p;
+	} else {
+		ep->oep_port = MACH_PORT_DEAD;
+	}
+}
+
+#pragma mark API
+kern_return_t
+os_crash_set_reporter_port(mach_port_t where,
+		os_crash_flags_t flags,  mach_port_t p)
+{
+	kern_return_t kr = KERN_FAILURE;
+	exception_mask_t mask = _exception_mask(flags);
+	exception_behavior_t bhvr = _exception_behavior();
+	thread_state_flavor_t flvr = _exception_thread_state_flavor();
+	mach_port_t host_priv = MACH_PORT_NULL;
+
+	// If we're not privleged to get the host-privileged port, no big deal, then
+	// the comparison below will fail.
+	(void)host_get_host_priv_port(mach_host_self(), &host_priv);
+
+	if (flags == OS_CRASH_FLAG_INIT) {
+		return KERN_SUCCESS;
+	}
+
+	if (where == mach_host_self() || where == host_priv) {
+		kr = host_set_exception_ports(where, mask, p, bhvr, flvr);
+	} else {
+		kr = task_set_exception_ports(where, mask, p, bhvr, flvr);
+	}
+
+	return kr;
+}
+
+kern_return_t
+os_crash_get_reporter_port_array(mach_port_t where, os_crash_port_array_t array)
+{
+	kern_return_t kr = KERN_FAILURE;
+	exception_mask_t masks[EXC_TYPES_COUNT];
+	mach_msg_type_number_t nmasks = 0;
+	exception_port_t ports[EXC_TYPES_COUNT];
+	exception_behavior_t behaviors[EXC_TYPES_COUNT];
+	thread_state_flavor_t flavors[EXC_TYPES_COUNT];
+	exception_mask_t mask = EXC_MASK_CRASH
+		| EXC_MASK_GUARD
+		| EXC_MASK_RESOURCE
+		| EXC_MASK_CORPSE_NOTIFY;
+	size_t i = 0;
+	size_t j = 0;
+	mach_port_t host_priv = MACH_PORT_NULL;
+
+	(void)host_get_host_priv_port(mach_host_self(), &host_priv);
+
+	if (where == mach_host_self() || where == host_priv) {
+		kr = host_get_exception_ports(mach_host_self(), mask,
+				masks, &nmasks, ports, behaviors, flavors);
+	} else {
+		kr = task_get_exception_ports(where, mask,
+				masks, &nmasks, ports, behaviors, flavors);
+	}
+
+	if (kr) {
+		goto __out;
+	}
+
+	bzero(array, sizeof(array[0]) * OS_CRASH_PORT_ARRAY_COUNT);
+	for (i = 0; i < nmasks; i++) {
+		if (masks[i] & EXC_MASK_CRASH) {
+			_os_exception_port_set(&array[j], OS_CRASH_CRASH, ports[i]);
+			j++;
+		}
+		if (masks[i] & EXC_MASK_GUARD) {
+			_os_exception_port_set(&array[j], OS_CRASH_GUARD, ports[i]);
+			j++;
+		}
+		if (masks[i] & EXC_MASK_RESOURCE) {
+			_os_exception_port_set(&array[j], OS_CRASH_RESOURCE, ports[i]);
+			j++;
+		}
+		if (masks[i] & EXC_MASK_CORPSE_NOTIFY) {
+			_os_exception_port_set(&array[j], OS_CRASH_CORPSE, ports[i]);
+			j++;
+		}
+		kr = mach_port_deallocate(mach_task_self(), ports[i]);
+		os_assert_mach("deallocate port", kr);
+	}
+
+__out:
+	return kr;
+}
+
+void
+os_crash_port_array_deallocate(os_crash_port_array_t array)
+{
+	size_t i = 0;
+
+	for (i = 0; i < 16; i++) {
+		if (MACH_PORT_VALID(array[i].oep_port)) {
+			kern_return_t kr = KERN_FAILURE;
+			kr = mach_port_deallocate(mach_task_self(), array[i].oep_port);
+			os_assert_mach("deallocate port", kr);
+		}
+	}
+}
+
+kern_return_t
+os_crash_spawnattr_set_reporter_port(posix_spawnattr_t *psattr,
+		os_crash_flags_t flags,  mach_port_t p)
+{
+	int error = -1;
+	exception_mask_t mask = _exception_mask(flags);
+	exception_behavior_t bhvr = _exception_behavior();
+	thread_state_flavor_t flvr = _exception_thread_state_flavor();
+
+	if (!MACH_PORT_VALID(p)) {
+		return KERN_INVALID_NAME;
+	}
+
+	if (flags == OS_CRASH_FLAG_INIT) {
+		return KERN_SUCCESS;
+	}
+
+	error = posix_spawnattr_setexceptionports_np(psattr, mask, p, bhvr, flvr);
+	os_assert_zero(error);
+
+	return KERN_SUCCESS;
+}