Method get_argv0

src/backward.h:1324–1330

    std::string exec_path_;

    static std::string get_argv0()
    {
        std::string argv0;
        std::ifstream ifs("/proc/self/cmdline");
        std::getline(ifs, argv0, '\0');
        return argv0;
    }

    static std::string read_symlink(std::string const& symlink_path)
    {