[BOLT] the libhwui.so did not generate prof.fdata in the /tmp directory

I use the following command: /llvm-bolt libhwui.so -instrument --instrumentation-file-append-pid  -o libhwui.bolt.so Successfully generated libwhui.bolt.so, and libhwui.bolt.so can run normally.But the libhwui.bolt.so did not generate prof.fdata in the /tmp directory,even though the /tmp directory is writable.If you have any tips, thank you very much!!!