Add MSan interceptor for fstat(2)

Summary:
Add new MSan interceptor that corrects NetBSD's
specific handling of fstat(2).

NetBSD renames the call to __fstat50.

Add new test: test/msan/fstat.cc

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, eugenis, vitalybuka

Reviewed By: vitalybuka

Subscribers: llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D41637

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@321765 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/test/msan/fstat.cc b/test/msan/fstat.cc
new file mode 100644
index 000000000..83f97054c
--- /dev/null
+++ b/test/msan/fstat.cc
@@ -0,0 +1,15 @@
+// RUN: %clangxx_msan -O0 %s -o %t && %run %t
+
+#include <sys/stat.h>
+#include <stdlib.h>
+
+int main(void) {
+  struct stat st;
+  if (fstat(0, &st))
+    exit(1);
+
+  if (S_ISBLK(st.st_mode))
+    exit(0);
+
+  return 0;
+}