clang may insert calls to memcpy

[vbar]

See e.g. the attached test of foreign_state v2 hook API:
memory.zip

In this case the problem can be suppressed by making the search_space data (which the hook doesn't modify - not clear why they have to be copied) global, but it would be nice to understand the problem better & have more general solutions, e.g. WebAssembly bulk memory support.