Symbol interposition? I don't know for sure, but I would guess gVisor is using ptrace or another mechanism, to interpose on syscalls, not library calls. But the

Symbol interposition? I don't know for sure, but I would guess gVisor is using ptrace or another mechanism, to interpose on syscalls, not library calls. But these flags, I believe, only impact interposition of symbols in the same library, so even if gVisor did use interposition for something, it may not matter.