--- /dev/null
+++ Libc/Libc-1698.140.3/gen/execinfo.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2007 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@
+ */
+#ifndef _EXECINFO_H_
+#define _EXECINFO_H_ 1
+
+#include <sys/cdefs.h>
+#include <_bounds.h>
+#include <Availability.h>
+#include <os/base.h>
+#include <os/availability.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <uuid/uuid.h>
+
+_LIBC_SINGLE_BY_DEFAULT()
+
+__BEGIN_DECLS
+
+int backtrace(void **_LIBC_COUNT(__size), int __size) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
+
+API_AVAILABLE(macosx(10.14), ios(12.0), tvos(12.0), watchos(5.0))
+OS_EXPORT
+int backtrace_from_fp(void *startfp, void **_LIBC_COUNT(size) array, int size);
+
+char *_LIBC_CSTR *_LIBC_COUNT_OR_NULL(__size) backtrace_symbols(void* const* _LIBC_COUNT(__size), int __size) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
+void backtrace_symbols_fd(void* const* _LIBC_COUNT(__size),int __size,int) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
+
+struct image_offset {
+	/*
+	 * The UUID of the image.
+	 */
+	uuid_t uuid;
+
+	/*
+	 * The offset is relative to the __TEXT section of the image.
+	 */
+	uint32_t offset;
+};
+
+API_AVAILABLE(macosx(10.14), ios(12.0), tvos(12.0), watchos(5.0))
+OS_EXPORT
+void backtrace_image_offsets(void* const* _LIBC_COUNT(size) array,
+		struct image_offset *image_offsets, int size);
+
+/*!
+ * @function backtrace_async
+ * Extracts the function return addresses of the current call stack. While
+ * backtrace() will only follow the OS call stack, backtrace_async() will
+ * prefer the unwind the Swift concurrency continuation stack if invoked
+ * from within an async context. In a non-async context this function is
+ * strictly equivalent to backtrace().
+ *
+ * @param array
+ * The array of pointers to fill with the return addresses.
+ *
+ * @param length
+ * The maximum number of pointers to write.
+ *
+ * @param task_id
+ * Can be NULL. If non-NULL, the uint32_t pointed to by `task_id` is set to
+ * a non-zero value that for the current process uniquely identifies the async
+ * task currently running. If called from a non-async context, the value is
+ * set to 0 and `array` contains the same values backtrace() would return.
+ *
+ * Note that the continuation addresses provided by backtrace_async()
+ * have an offset of 1 added to them.  Most symbolication engines will
+ * substract 1 from the call stack return addresses in order to symbolicate
+ * the call site rather than the return location.  With a Swift async
+ * continuation, substracting 1 from its address would result in an address
+ * in a different function.  This offset allows the returned addresses to be
+ * handled correctly by most existing symbolication engines.
+ *
+ * @result
+ * The number of pointers actually written.
+ */
+API_AVAILABLE(macosx(12.0), ios(15.0), tvos(15.0), watchos(8.0))
+size_t backtrace_async(void** _LIBC_COUNT(length) array, size_t length, uint32_t *task_id);
+
+__END_DECLS
+
+#endif /* !_EXECINFO_H_ */