c++ - 分解 C++ 代码大小

Question

我正在为旧博文中的第一个问题寻找 Stack Overflow 风格的不错答案 C++ Code Size ，我将在下面重复:

I’d really like some tool (ideally, g++ based) that shows me what parts of compiled/linked code are generated from what parts of C++ source code. For instance, to see whether a particular template is being instantiated for hundreds of different types (fixable via a template specialization) or whether code is being inlined excessively, or whether particular functions are larger than expected.

Answer 1

如果您要查找 C++ 代码中膨胀的代码来源，我使用了“nm”。以下命令将列出您应用中的所有符号，其中最大的代码和数据 block 位于顶部:

nm --demangle --print-size --size-sort --reverse-sort <executable_or_lib_name> | less