[msan] Intercept strxfrm.

llvm-svn: 208303

1 files changed, 15 insertions, 0 deletions

diff --git a/compiler-rt/test/msan/strxfrm.cc b/compiler-rt/test/msan/strxfrm.cc
new file mode 100644
index 00000000000..b930a6af69c
--- /dev/null
+++ b/compiler-rt/test/msan/strxfrm.cc
@@ -0,0 +1,15 @@
+// RUN: %clangxx_msan -m64 -O0 -g %s -o %t && %run %t
+
+#include <assert.h>
+#include <sanitizer/msan_interface.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(void) {
+  const char *p = "abcdef";
+  char q[10];
+  size_t n = strxfrm(q, p, sizeof(q));
+  assert(n < sizeof(q));
+  __msan_check_mem_is_initialized(q, n + 1);
+  return 0;
+}