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      1 // Copyright 2009 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Tests global loads from eval.
     29 
     30 var x = 27;
     31 
     32 function test() {
     33   function g() {
     34     assertEquals(27, eval('x'));
     35     function h() {
     36       // Shadow with local variable.
     37       var x = 22;
     38       assertEquals(22, eval('x'));
     39       function i(x) {
     40         // Shadow with parameter.
     41         assertEquals(44, eval('x'));
     42         function j() {
     43           assertEquals(x, eval('x'));
     44           // Shadow with function name.
     45           function x() {
     46             assertEquals(x, eval('x'));
     47           }
     48           x();
     49         }
     50         j();
     51       }
     52       i(44);
     53     }
     54     h();
     55   }
     56   g();
     57 }
     58 
     59 test();
     60 
     61 // Test loading of globals from deeply nested eval.  This code is a
     62 // bit complicated, but the complication is needed to check that the
     63 // code that loads the global variable accounts for the fact that the
     64 // global variable becomes shadowed by an eval-introduced variable.
     65 var result = 0;
     66 function testDeep(source, load, test) {
     67   eval(source);
     68   function f() {
     69     var y = 23;
     70     function g() {
     71       var z = 25;
     72       function h() {
     73         eval(load);
     74         eval(test);
     75       }
     76       h();
     77     }
     78     g();
     79   }
     80   f();
     81 }
     82 testDeep('1', 'result = x', 'assertEquals(27, result)');
     83 // Because of the eval-cache, the 'result = x' code gets reused.  This
     84 // time in a context where the 'x' variable has been shadowed.
     85 testDeep('var x = 1', 'result = x', 'assertEquals(1, result)');
     86