gdbcmds.txt

shell sleep 5
set logging file UUID.gdb.log
set logging on
target remote localhost:9999
file /nas/brendan/syzkaller_recordings/kernels/UUID/vmlinux
break panic
commands 1
break __delay
c
end
c
maint packet qPandaCmd:when
dump memory UUID.bin log_buf log_buf+log_buf_len
q

get_dmesg.sh

#!/bin/bash

UUID=${1}

# Unzip. Done in parallel because pigz can't decompress in parallel.
unpigz /nas/brendan/syzkaller_recordings/replays/${UUID}.exe/${UUID}.exe-rr-snp.gz &
lz4 /nas/brendan/syzkaller_recordings/replays/${UUID}.exe/${UUID}.exe-rr-nondet.log.lz4 &
unpigz /nas/brendan/syzkaller_recordings/kernels/${UUID}/vmlinux.gz &
wait

logf=$(mktemp $(pwd)/qemu_log_XXXXXXX)
~/git/panda/build/x86_64-softmmu/qemu-system-x86_64 -m 4G -replay /nas/brendan/syzkaller_recordings/replays/${UUID}.exe/${UUID}.exe -gdb tcp::9999 -S &> ${logf} &
qemu_pid=$!
# Wait for the replay to start before trying to connect via gdb
until cat ${logf} | grep -m1 "opening nondet log for read"; do sleep .1 ; done
sleep .5

sed "s/UUID/${UUID}/g" ~/gdbcmds.txt > ${UUID}.gdb
gdb -x ${UUID}.gdb < /dev/null
kill ${qemu_pid}
mv ${logf} ${UUID}.qemu.log

# Rezip
pigz /nas/brendan/syzkaller_recordings/replays/${UUID}.exe/${UUID}.exe-rr-snp \
     /nas/brendan/syzkaller_recordings/kernels/${UUID}/vmlinux 
rm /nas/brendan/syzkaller_recordings/replays/${UUID}.exe/${UUID}.exe-rr-nondet.log