tree 1a6a9be7882647e5a94d1656664987496b03ceaf
parent 40fc3de369a32131047753a72de4444202587e76
author Ilya Leoshkevich <iii@linux.ibm.com> 1585919706 +0200
committer Ilya Leoshkevich <iii@linux.ibm.com> 1585927133 +0200

[MSan] Add COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED

Summary:
MSan not implementing COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED looks
like an omission - this macro makes it possible for those intercepted
functions, which libc needs very early, to work before interceptors are
initialized (i.e. before REAL() is usable).

While currently there are no observable practical problems in this
area, changes in libc or in MSan runtime may provoke them. Therefore,
change MSan to work like ASan and TSan already do - use internal
functions in certain interceptors when initialization is not complete.

Reviewers: eugenis, vitalybuka

Reviewed By: eugenis

Subscribers: #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D76969