llvm

a8cdc5a4 - [compiler-rt][msan] Guard shmat interceptor w SANITIZER_INTERCEPT_SHMCTL (#189198)

[compiler-rt][msan] Guard shmat interceptor w SANITIZER_INTERCEPT_SHMCTL (#189198) The shmat interceptor calls REAL(shmctl), but shmctl is not intercepted on all targets (e.g. 32-bit Linux with musl). Guard shmat behind SANITIZER_INTERCEPT_SHMCTL and use a MSAN_MAYBE_INTERCEPT pattern consistent with other conditional interceptors.