tree a083eae2c8ca447c67e7b5b4a985035118c2f59d
parent 218916269f5b8948da3183fe1f13a2177a876961
author Fangrui Song <maskray@google.com> 1595575426 -0700
committer Copybara-Service <copybara-worker@google.com> 1616739671 -0700

[libFuzzer] Instrument bcmp

If we define memcmp in an archive, bcmp should be defined as well (many libc
define bcmp/memcmp in one object file).  Otherwise if the application calls bcmp
or strcmp which gets optimized to bcmp (SimplifyLibCalls), the undefined
reference may pull in an optimized bcmp/strcmp implementation (libc replacement)
later on the linker command line.  If both libFuzzer's memcmp and the optimized
memcmp are strong => there will be a multiple definition error.

GitOrigin-RevId: f7ffb122d08e7a8203557898c67eaac3a857b152