--- Libc/Libc-498/gen/execinfo.h
+++ Libc/Libc-1583.40.7/gen/execinfo.h
@@ -24,12 +24,74 @@
 #define _EXECINFO_H_ 1
 
 #include <sys/cdefs.h>
+#include <Availability.h>
+#include <os/base.h>
+#include <os/availability.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <uuid/uuid.h>
 
 __BEGIN_DECLS
 
-int backtrace(void**,int);
-char** backtrace_symbols(void* const*,int);
-void backtrace_symbols_fd(void* const*,int,int);
+int backtrace(void**,int) __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 **array, int size);
+
+char** backtrace_symbols(void* const*,int) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
+void backtrace_symbols_fd(void* const*,int,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* 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** array, size_t length, uint32_t *task_id);
 
 __END_DECLS