使用 libunwind 获取模块地址

Question

I extract the instruction pointer from a stackframe using libunwind like this:

unw_get_reg ( &cursor, UNW_REG_IP, &ip );

However, this only gives me the dynamic addresses of the function pointers. I would like to receive the static addresses in the modules so I can query them via addr2line.

A different thread didn't receive an answer back then. Do you know how to achieve this info?

Regards

Answer 1

Assuming that by static address you mean offset from the start of the module where the function resides, you may use dladdr(ip, info) where info.dli_fbase gives you the base address of the loaded module. Then (pc - info.dli_fbase) gives you the offset of this function from the start of the module.