In the Itanium C++ ABI, global variable destructors are registered using __cxa_atexit and called by __cxa_finalize during dlclose.
However, these functions are provided by libc, and registered destructors are stored in the global AtexitEntry array.
Even after the destructors are called, gaps are left in the array.
Therefore, C++ Zygisk modules could be detected using the AtexitEntry array.
This repository provides a local implementation of __cxa_atexit and __cxa_finalize that ensures your Zygisk module does not interfere with the global AtexitEntry array while correctly implementing global object destruction.
This implementation is inspired by bionic (https://android.googlesource.com/platform/bionic/+/master/libc/bionic/atexit.cpp), with necesscary modifications.
Add atexit.cpp to your zygisk module's source code set.