symbol.sh ~~查詢 Symbol 的好用工具

先來看一下何謂 Symbol Table (以下來源: Wiki)

In computer science, a symbol table is a data structure used by a language translator such as a compiler or interpreter, where each identifier in a program's source code is associated with information relating to its declaration or appearance in the source, such as its type, scope level and sometimes its location.

在 Linux 下，我們可以使用 nm 這個指令來列出 Object 裡面 Symbol Table 的內容。

下面這隻 Script 可以快速查出特定的 Symbol 出現在哪一個 Object 裡面
感謝原作者 parrot 大方提供。

#!/bin/bash

if [ $# == 0 ]; then
@@@@echo "Usage: $0 "
@@@@echo "@@@@@: $0 "
@@@@echo ""
@@@@exit
fi


dir=.
if [ $# == 2 ]; then
@@@@dir=$2
fi

echo "--------------------------------------------------------------------------------"
echo "Processing ..."
echo ""


list=`find $dir -regex ".*\.o" -or -regex ".*\.a" -or -regex ".*\.sa" -or -regex ".*\.so" -or -regex ".*\.ko"`

for x in $list
do
@@@@nm -A $x 2> /dev/null | grep --color -w $1
done

echo "--------------------------------------------------------------------------------"