ardupilot/Tools/scripts/dumpstack

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#!/bin/sh
# we want everything on stderr, so the program is not disturbed
exec 1>&2
PID=$1
TMPFILE=/tmp/gdb.$$
cat << EOF > $TMPFILE
set height 0
bt full
thread apply all bt full
quit
EOF
gdb -n -batch -x $TMPFILE --pid $PID < /dev/null 2>&1
/bin/rm -f $TMPFILE