Fix calls of strict mode function with an implicit receiver.

test/mjsunit/strict-mode-implicit-receiver.js

+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+var y = 3;
+
+function get_y() { return this.y; }
+function strict_get_y() { "use strict"; return this.y; }
+
+// Test calls to strict mode function with explicit receivers.
+for (var i = 0; i < 10; i++) assertEquals(3, strict_get_y.call(this));
+var o = { y: 42 };
+for (var i = 0; i < 10; i++) assertEquals(42, strict_get_y.call(o));
+
+// Test calls to strict mode function with implicit receiver.
+function g() {
+  var exception = false;
+  try { strict_get_y(); } catch(e) { exception = true; }
+  assertTrue(exception);
+}
+for (var i = 0; i < 3; i++) g();
+
+// Test calls to local strict mode function with implicit receiver.
+function local_function_test() {
+  function get_y() { return this.y; }
+  function strict_get_y() { "use strict"; return this.y; }
+  assertEquals(3, get_y());
+  assertEquals(3, get_y(23));
+  strict_get_y();
+}
+
+// TODO(ager): Rewrite this test once strict mode detection works.
+var exception = false;
+for (var i = 0; i < 10; i++) {
+  try {
+    local_function_test();
+  } catch(e) {
+    exception = true;
+  }
+  assertTrue(exception);
+}
+
+// Test call to catch variable strict-mode function. Implicit
+// receiver.
+var exception = false;
+try {
+  throw strict_get_y;
+} catch(f) {
+  try {
+    f();
+  } catch(e) {
+    exception = true;
+  }
+  assertTrue(exception);
+}
+
+
+// Test calls to strict-mode function with the object from a with
+// statement as the explicit receiver.
+with(this) {
+  assertEquals(3, strict_get_y());
+  assertEquals(3, strict_get_y(32));
+}
+
+var o = { y: 27 };
+o.f = strict_get_y;
+with(o) {
+  assertEquals(27, f());
+  assertEquals(27, f(23));
+}
+
+
+// Check calls to eval within a function with 'undefined' as receiver.
+function implicit_receiver_eval() {
+  "use strict";
+  return eval("this");
+}
+
+assertEquals(void 0, implicit_receiver_eval());
+assertEquals(void 0, implicit_receiver_eval(32));
+
+
+// Strict mode function to get inlined.
+function strict_return_receiver() {
+  "use strict";
+  return this;
+}
+
+// Inline with implicit receiver.
+function g() {
+  return strict_return_receiver();
+}
+
+for (var i = 0; i < 5; i++) {
+  assertEquals(void 0, g());
+  assertEquals(void 0, g(42));
+}
+%OptimizeFunctionOnNextCall(g);
+assertEquals(void 0, g(42));
+assertEquals(void 0, g());
+
+// Inline with explicit receiver.
+function g2() {
+  var o = {};
+  o.f = strict_return_receiver;
+  return o.f();
+}
+
+for (var i = 0; i < 5; i++) {
+  assertTrue(typeof g2() == "object");
+  assertTrue(typeof g2(42) == "object");
+}
+%OptimizeFunctionOnNextCall(g2);
+assertTrue(typeof g2() == "object");
+assertTrue(typeof g2(42) == "object");
+
+// Implicit receiver to strict mode function overwriting eval.
+// TODO(ager): Rewrite when strict mode detection has been fixed.
+function call_result_eval() { return function() { "use strict"; return this; } }
+var eval = call_result_eval();
+assertEquals(void 0, eval());