[compiler-rt] r325207 - Prevent recursive MSan interceptors in fgets(3)

[Kamil Rytarowski via llvm-commits]

Author: kamil
Date: Wed Feb 14 18:47:35 2018
New Revision: 325207

URL: http://llvm.org/viewvc/llvm-project?rev=325207&view=rev
Log:
Prevent recursive MSan interceptors in fgets(3)

Summary:
This corrects intercepting this call on NetBSD without false positives.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, eugenis, vitalybuka

Reviewed By: vitalybuka

Subscribers: llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D42884

Modified:
    compiler-rt/trunk/lib/msan/msan_interceptors.cc

Modified: compiler-rt/trunk/lib/msan/msan_interceptors.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/msan/msan_interceptors.cc?rev=325207&r1=325206&r2=325207&view=diff
==============================================================================
--- compiler-rt/trunk/lib/msan/msan_interceptors.cc (original)
+++ compiler-rt/trunk/lib/msan/msan_interceptors.cc Wed Feb 14 18:47:35 2018
@@ -779,6 +779,7 @@ INTERCEPTOR(int, socketpair, int domain,
 
 INTERCEPTOR(char *, fgets, char *s, int size, void *stream) {
   ENSURE_MSAN_INITED();
+  InterceptorScope interceptor_scope;
   char *res = REAL(fgets)(s, size, stream);
   if (res)
     __msan_unpoison(s, REAL(strlen)(s) + 1);