Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/msan/strerror_r-non-gnu.c

@@ -0,0 +1,18 @@
+// RUN: %clang_msan -std=c99 -O0 -g %s -o %t && %run %t
+
+// strerror_r under a weird set of circumstances can be redirected to
+// __xpg_strerror_r. Test that MSan handles this correctly.
+
+#define _POSIX_C_SOURCE 200112
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+int main() {
+  char buf[1000];
+  int res = strerror_r(EINVAL, buf, sizeof(buf));
+  assert(!res);
+  volatile int z = strlen(buf);
+  return 0;
+}