[strong] Check arity of functions

test/cctest/compiler/test-run-inlining.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "test/cctest/compiler/function-tester.h"
 
 #if V8_TURBOFAN_TARGET
 
@@ skipping 508 matching lines @@
       "  %SetInlineBuiltinFlag(foo);"
       "  %SetInlineBuiltinFlag(baz);"
       "  return bar;"
       "})();",
       kBuiltinInlineFlags);
 
   InstallAssertInlineCountHelper(CcTest::isolate());
   T.CheckCall(T.true_value());
 }
 
+
+TEST(StrongModeArity) {
+  FLAG_turbo_deoptimization = true;
+  FLAG_strong_mode = true;
+  FunctionTester T(
+      "(function () {"
+      "  function foo(x, y) { 'use strong'; return x; }"
+      "  function bar(x, y) { return foo(x); }"
+      "  return bar;"
+      "})();",
+      kInlineFlags);
+  T.CheckThrows(T.undefined(), T.undefined());
+}
+
+
+TEST(StrongModeArityOuter) {
+  FLAG_turbo_deoptimization = true;
+  FLAG_strong_mode = true;
+  FunctionTester T(
+      "(function () {"
+      "  'use strong';"
+      "  function foo(x, y) { return x; }"
+      "  function bar(x, y) { return foo(x); }"
+      "  return bar;"
+      "})();",
+      kInlineFlags);
+  T.CheckThrows(T.undefined(), T.undefined());
+}
 #endif  // V8_TURBOFAN_TARGET