Function debug_is_safe_string

src/debug.cpp:811–824

Verify that a string is safe for passing as an argument to addr2line. In particular, we want to avoid any characters of significance to the shell.

// Verify that a string is safe for passing as an argument to addr2line.
// In particular, we want to avoid any characters of significance to the shell.
static bool debug_is_safe_string( const char *start, const char *finish )
{
    static constexpr char safe_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                                         "abcdefghijklmnopqrstuvwxyz"
                                         "01234567890_./-+";
    using std::begin;
    using std::end;
    const auto is_safe_char =
    [&]( char c ) {
        const char *in_safe = std::find( begin( safe_chars ), end( safe_chars ), c );
        return c && in_safe != end( safe_chars );
    };
    return std::all_of( start, finish, is_safe_char );
}

static std::string debug_resolve_binary( const std::string &binary, std::ostream &out )
{