1 files changed, 42 insertions, 0 deletions
diff --git a/lib/sanitizer_common/tests/sanitizer_libc_test.cc b/lib/sanitizer_common/tests/sanitizer_libc_test.cc
new file mode 100644
index 000000000000..b9d8414e0cbf
--- /dev/null
+++ b/lib/sanitizer_common/tests/sanitizer_libc_test.cc
@@ -0,0 +1,42 @@
+//===-- sanitizer_libc_test.cc --------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// Tests for sanitizer_libc.h.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_common/sanitizer_libc.h"
+#include "gtest/gtest.h"
+
+// A regression test for internal_memmove() implementation.
+TEST(SanitizerCommon, InternalMemmoveRegression) {
+  char src[] = "Hello World";
+  char *dest = src + 6;
+  __sanitizer::internal_memmove(dest, src, 5);
+  EXPECT_EQ(dest[0], src[0]);
+  EXPECT_EQ(dest[4], src[4]);
+}
+
+TEST(SanitizerCommon, mem_is_zero) {
+  size_t size = 128;
+  char *x = new char[size];
+  memset(x, 0, size);
+  for (size_t pos = 0; pos < size; pos++) {
+    x[pos] = 1;
+    for (size_t beg = 0; beg < size; beg++) {
+      for (size_t end = beg; end < size; end++) {
+        // fprintf(stderr, "pos %zd beg %zd end %zd \n", pos, beg, end);
+        if (beg <= pos && pos < end)
+          EXPECT_FALSE(__sanitizer::mem_is_zero(x + beg, end - beg));
+        else
+          EXPECT_TRUE(__sanitizer::mem_is_zero(x + beg, end - beg));
+      }
+    }
+    x[pos] = 0;
+  }
+  delete [] x;
+}