This patch relands commit 3e3e79a9e4c378b59f5f393f556e6a84edcd8898, and fixes the memory sanitizer issue described in D120284, by removing the output arguments from the LLDB_INSTRUMENT_VA invocation. Differential Revision: https://reviews.llvm.org/D120599 Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>