----- BUILDING

# Fetch static prebuilt version of llvm-symbolizer (addr2line-like program from LLVM)

$ mkdir /public/extras
$ cd /public/extras
$ ftp www.netbsd.org/~kamil/llvm/llvm-symbolizer

# Distribution built with:

./build.sh -N0 -U -j8 -u -O /public/netbsd-llvm.mksanitizer -V MKGCC=no -V MKLLVM=yes -V HAVE_LLVM=yes -V MKDEBUG=yes -V MKDEBUGLIB=yes -V MKKDEBUG=yes -V MKSANITIZER=yes -V MAKECONF=/dev/null distribution
./build.sh -N0 -U -j8 -u -O /public/netbsd-llvm.mksanitizer -V MKGCC=no -V MKLLVM=yes -V HAVE_LLVM=yes -V MKDEBUG=yes -V MKDEBUGLIB=yes -V MKKDEBUG=yes -V MKSANITIZER=yes -V MAKECONF=/dev/null release
./build.sh -C /public/extras -N0 -U -j8 -u -O /public/netbsd-llvm.mksanitizer -V MKGCC=no -V MKLLVM=yes -V HAVE_LLVM=yes -V MKDEBUG=yes -V MKDEBUGLIB=yes -V MKKDEBUG=yes -V MKSANITIZER=yes -V MAKECONF=/dev/null iso-image

---- INSTALLING IN QEMU

# Boot .iso

/public/netbsd-llvm.mksanitizer/releasedir/images/NetBSD-9.99.7-amd64.iso

# break sysinst (ctrl-c)

and set in shell:

# export ASAN_OPTIONS=log_path=/tmp/asan.txt

add llvm-symbolizer to $PATH (important, it's by default in /llvm-symbolizer)

# export PATH=/:$PATH

run installer

# sysinst


------- RUNNING IN CHROOT

Executed in chroot

$ cat mount.sh                                                                                   
#!/bin/sh

cp /usr/pkg/bin/mg /public/netbsd-llvm.mksanitizer/destdir.amd64/bin/mg
mount -t null /dev /public/netbsd-llvm.mksanitizer/destdir.amd64/dev
mount -t null /dev/pts /public/netbsd-llvm.mksanitizer/destdir.amd64/dev/pts
mount -t null /tmp /public/netbsd-llvm.mksanitizer/destdir.amd64/tmp

$ sudo chroot /public/netbsd-llvm.mksanitizer/destdir.amd64

---

# uname -a
NetBSD chieftec 9.99.7 NetBSD 9.99.7 (GENERIC) #0: Tue Aug 13 23:42:52 CEST 2019  root@chieftec:/public/netbsd-root/sys/arch/amd64/compile/GENERIC amd64

# LC_ALL=C date
Sat Aug 17 03:52:42 CEST 2019

# export ASAN_OPTIONS=detect_container_overflow=0:log_path=/tmp/asan.txt:dump_instruction_bytes=true
# cd /usr/tests
# atf-run