1 files changed, 65 insertions, 0 deletions
diff --git a/lib/interception/tests/interception_linux_test.cc b/lib/interception/tests/interception_linux_test.cc
new file mode 100644
index 0000000000000..4a1ae785d16f4
--- /dev/null
+++ b/lib/interception/tests/interception_linux_test.cc
@@ -0,0 +1,65 @@
+//===-- interception_linux_test.cc ----------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
+// Tests for interception_linux.h.
+//
+//===----------------------------------------------------------------------===//
+#include "interception/interception.h"
+
+#include "gtest/gtest.h"
+
+// Too slow for debug build
+#if !SANITIZER_DEBUG
+#if SANITIZER_LINUX
+
+static int InterceptorFunctionCalled;
+
+DECLARE_REAL(int, isdigit, int);
+
+INTERCEPTOR(int, isdigit, int d) {
+  ++InterceptorFunctionCalled;
+  return d >= '0' && d <= '9';
+}
+
+namespace __interception {
+
+TEST(Interception, GetRealFunctionAddress) {
+  uptr expected_malloc_address = (uptr)(void*)&malloc;
+  uptr malloc_address = 0;
+  EXPECT_TRUE(GetRealFunctionAddress("malloc", &malloc_address, 0, 0));
+  EXPECT_EQ(expected_malloc_address, malloc_address);
+
+  uptr dummy_address = 0;
+  EXPECT_TRUE(
+      GetRealFunctionAddress("dummy_doesnt_exist__", &dummy_address, 0, 0));
+  EXPECT_EQ(0U, dummy_address);
+}
+
+TEST(Interception, Basic) {
+  ASSERT_TRUE(INTERCEPT_FUNCTION(isdigit));
+
+  // After interception, the counter should be incremented.
+  InterceptorFunctionCalled = 0;
+  EXPECT_NE(0, isdigit('1'));
+  EXPECT_EQ(1, InterceptorFunctionCalled);
+  EXPECT_EQ(0, isdigit('a'));
+  EXPECT_EQ(2, InterceptorFunctionCalled);
+
+  // Calling the REAL function should not affect the counter.
+  InterceptorFunctionCalled = 0;
+  EXPECT_NE(0, REAL(isdigit)('1'));
+  EXPECT_EQ(0, REAL(isdigit)('a'));
+  EXPECT_EQ(0, InterceptorFunctionCalled);
+}
+
+}  // namespace __interception
+
+#endif  // SANITIZER_LINUX
+#endif  // #if !SANITIZER_DEBUG