1 files changed, 70 insertions, 0 deletions
diff --git a/mfbt/StaticAnalysisFunctions.h b/mfbt/StaticAnalysisFunctions.h
new file mode 100644
index 0000000000..b073055c05
--- /dev/null
+++ b/mfbt/StaticAnalysisFunctions.h
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_StaticAnalysisFunctions_h
+#define mozilla_StaticAnalysisFunctions_h
+
+#ifndef __cplusplus
+#  ifndef bool
+#    include <stdbool.h>
+#  endif
+#  define MOZ_CONSTEXPR
+#else  // __cplusplus
+#  include "mozilla/Attributes.h"
+#  define MOZ_CONSTEXPR constexpr
+#endif
+/*
+ * Functions that are used as markers in Gecko code for static analysis. Their
+ * purpose is to have different AST nodes generated during compile time and to
+ * match them based on different checkers implemented in build/clang-plugin
+ */
+
+#ifdef MOZ_CLANG_PLUGIN
+
+#  ifdef __cplusplus
+/**
+ * MOZ_KnownLive - used to opt an argument out of the CanRunScript checker so
+ * that we don't check it if is a strong ref.
+ *
+ * Example:
+ * canRunScript(MOZ_KnownLive(rawPointer));
+ */
+template <typename T>
+static MOZ_ALWAYS_INLINE T* MOZ_KnownLive(T* ptr) {
+  return ptr;
+}
+
+/**
+ * Ditto, but for references.
+ */
+template <typename T>
+static MOZ_ALWAYS_INLINE T& MOZ_KnownLive(T& ref) {
+  return ref;
+}
+
+#  endif
+
+/**
+ * MOZ_AssertAssignmentTest - used in MOZ_ASSERT in order to test the possible
+ * presence of assignment instead of logical comparisons.
+ *
+ * Example:
+ * MOZ_ASSERT(retVal = true);
+ */
+static MOZ_ALWAYS_INLINE MOZ_CONSTEXPR bool MOZ_AssertAssignmentTest(
+    bool exprResult) {
+  return exprResult;
+}
+
+#  define MOZ_CHECK_ASSERT_ASSIGNMENT(expr) MOZ_AssertAssignmentTest(!!(expr))
+
+#else
+
+#  define MOZ_CHECK_ASSERT_ASSIGNMENT(expr) (!!(expr))
+#  define MOZ_KnownLive(expr) (expr)
+
+#endif /* MOZ_CLANG_PLUGIN */
+#endif /* StaticAnalysisFunctions_h */