剥离的符号不是从字符串linux工具中隐藏的

Question

I have a shared library with the symbols stripped. Using a known method/tool to get the symbol names (like nm -D , objdump , readelf , etc) I see that all the symbols are actually hidden.

However, if I run the strings linux tool on my shared library, I can see some of those symbols exposed. I made sure I don't print any of those symbols in messages, but it still somehow prints the symbols that I expect to be stripped.

So, my question is, how can I hide my symbols even from the strings command line tool in linux? Any help would be appreciated.

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EDIT: I am using strip -strip--all to hide the static symbols and I also enable the -fvisibility=hidden compile flag to hide the unneeded dynamic symbols.

Answer 1

Taken from man strings :

^DESCRIPTION

^{For each file given, GNU strings prints the printable character sequences that are at least 4 characters long.}

The difference between strings and the tools mentioned by you ( readelf , objdump , etc) is that those rely mostly on the DWARF information embedded in the ELF object, whereas the strings utility outputs ANY printable sequence from the binary data (DWARF unrelated).

How can I hide my symbols even from the strings utility: this could be of help.