红帽全球峰会15.5. 使用 GCC 强化代码
当编译器将源代码转换为对象代码时，它可以添加各种检查来防止经常被利用的情况，从而提高安全性。选择正确的编译器选项集可帮助生成更安全的程序和库，而无需更改源代码。
发行版本选项
对于目标为 Red Hat Enterprise Linux 的开发人员，推荐使用以下选项列表：
gcc ... -O2 -g -Wall -Wl,-z,now,-z,relro -fstack-protector-strong -D_FORTIFY_SOURCE=2 ...
$ gcc ... -O2 -g -Wall -Wl,-z,now,-z,relro -fstack-protector-strong -D_FORTIFY_SOURCE=2 ...-
对于程序，添加
-fPIE和-pie位置独立的可执行文件选项。 -
对于动态链接的库，强制
-fPIC(Position Independent Code)选项间接提高了安全性。
开发选项
建议您在开发过程中检测安全漏洞。使用这些选项以及发行版本的选项：
gcc ... -Walloc-zero -Walloca-larger-than -Wextra -Wformat-security -Wvla-larger-than ...
$ gcc ... -Walloc-zero -Walloca-larger-than -Wextra -Wformat-security -Wvla-larger-than ...其它资源
- 防御编码指南
- Red Hat Developer 博客文章 - 使用 GCC 的内存错误检测
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}