Hi,

The attached patch is the libsanitizer merge from upstream r169392.
Among other things It fixes the darwin build.

Automatically generated by libsanitizer/merge.sh
Tested with
rm -rf */{*/,}libsanitizer \
  && make -j 50 \
  && make -C gcc check-g{cc,++}
RUNTESTFLAGS='--target_board=unix\{-m32,-m64\} asan.exp'

Ok to commit?

--kcc