[Sanitizers][Darwin][Test] The top few frames are inaccurate in UBSan. (#153899)

XFailing until further investigation

rdar://158303080

Author: usama54321

compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp

@@ -10,6 +10,10 @@
 
 // REQUIRES: stable-runtime
 
+// rdar://158303080 top few frames are at times inaccurate in ubsan fast stack
+// unwind on darwin
+// XFAIL: (darwin && ubsan && (arm64-target-arch || arm64e-target-arch))
+
 // XFAIL: target={{.*netbsd.*}} && !asan
 
 volatile int *null = 0;