Post-Startup Dynamic Loading

When a shared library containing TLS is loaded following process startup, the runtime linker extends the list of initialization records to include the initialization template of new library. The new object is given an index of m = M + 1, and the counter M is incremented by one. However, the allocation of new TLS blocks is deferred until they are actually referenced.

When a library containing TLS is unloaded, the TLS blocks used by that library are freed.