Functions which is weak symbol will be hooked, is it nessasary?

[demon90s]

Some functions, like template member functions, or normal member functions defined in a header file, would be as weak symbol.

When we write something like std::vector<std::string> , it will generate some code from compiler. If we hook these functions, is there any thread safe issue?

[ddovod]

As I mentioned in the readme, this library is not thread safe. I'm not completely understanding your specific case, but I'm sure it won't be thread safe as well because in this kind of applications thread safety is very complicated and not easily achievable, at least I didn't find the way to do this.