#!/bin/bashif (( $# < 1 ))then    echo "usage: `basename $0` pid" 1>&2    exit 1fiif [[ ! -r /proc/$1 ]]then    echo "Process $1 not found." 1>&2    exit 1fibacktrace="bt"if [[ -d /proc/$1/task ]]then    if [[ `ls /proc/$1/task 2>/dev/null | wc -l` > 1 ]]    then        backtrace="thread apply all bt"    fi  ;elif [[ -f /proc/$1/maps ]]then    if grep -e libpthread /proc/$1/maps > /dev/null 2>&1    then        backtrace="thread apply all bt"    fifiGDB=gdb$GDB -quiet -nx /proc/$1/exe -p $1 <<<"$backtrace" |    sed -n  \    -e 's/^(gdb) //' \    -e '/^#/p' \    -e '/^Thread/p'

使用方法:

pstack.sh pid