Change implementation of eval to make an exact distinction between direct eva...

test/mjsunit/eval.js

+// Copyright 2008 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.
+
+assertEquals(void 0, eval());
+assertEquals(4, eval(4));
+
+function f() { return 'The f function'; };
+assertTrue(f === eval(f));
+
+function g(x, y) { return 4; };
+
+count = 0;
+assertEquals(4, eval('2 + 2', count++));
+assertEquals(1, count);
+
+try {
+  eval('hest 7 &*^*&^');
+  assertTrue(false, 'Did not throw on syntax error.');
+} catch (e) {
+  assertEquals('SyntaxError', e.name);
+}
+
+
+// eval has special evaluation order for consistency with other browsers.
+global_eval = eval;
+assertEquals(void 0, eval(eval("var eval = function f(x) { return 'hest';}")))
+eval = global_eval;
+
+//Test eval with different number of parameters.
+global_eval = eval;
+eval = function(x, y) { return x + y; };
+assertEquals(4, eval(2, 2));
+eval = global_eval;
+
+// Test that un-aliased eval reads from local context.
+foo = 0;
+result = 
+  (function() {
+    var foo = 2;
+    return eval('foo');
+  })();
+assertEquals(2, result);
+
+//Test that un-aliased eval writes to local context.
+foo = 0;
+result = 
+  (function() {
+    var foo = 1;
+    eval('foo = 2');
+    return foo;
+  })();
+assertEquals(2, result);
+assertEquals(0, foo);
+
+// Test that un-aliased eval has right receiver.
+function MyObject() { this.self = eval('this'); }
+var o = new MyObject();
+assertTrue(o === o.self);
+
+// Test that aliased eval reads from global context.
+var e = eval;
+foo = 0;
+result = 
+  (function() {
+    var foo = 2;
+    return e('foo');
+  })();
+assertEquals(0, result);
+
+// Test that aliased eval writes to global context.
+var e = eval;
+foo = 0;
+(function() { e('var foo = 2;'); })();
+assertEquals(2, foo);
+
+// Test that aliased eval has right receiver.
+function MyOtherObject() { this.self = e('this'); }
+var o = new MyOtherObject();
+assertTrue(this === o.self);
+
+// Try to cheat the 'aliased eval' detection.
+var x = this;
+foo = 0;
+result = 
+  (function() {
+    var foo = 2;
+    return x.eval('foo');
+  })();
+assertEquals(0, result);
+
+foo = 0;
+result = 
+  (function() {
+    var eval = function(x) { return x; };
+    var foo = eval(2);
+    return e('foo');
+  })();
+assertEquals(0, result);
+
+result =
+  (function() {
+    var eval = function(x) { return 2 * x; };
+    return (function() { return eval(2); })();
+  })();
+assertEquals(4, result);
+
+eval = function(x) { return 2 * x; };
+result = 
+  (function() {
+    return (function() { return eval(2); })();
+  })();
+assertEquals(4, result);