Restore test and behavior prior to deferred stack trace formatting.

test/mjsunit/stack-traces-gc.js

-// Copyright 2012 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: --expose-gc --allow-natives-syntax
-
-var fired = [];
-for (var i = 0; i < 100; i++) fired[i] = false;
-
-function getter_function(i) {
-  return %MarkOneShotGetter( function() { fired[i] = true; } );
-}
-
-// Error objects that die young.
-for (var i = 0; i < 100; i++) {
-  var error = new Error();
-  // Replace the getter to observe whether it has been fired,
-  // and disguise it as original getter.
-  var getter = getter_function(i);
-  error.__defineGetter__("stack", getter);
-
-  error = undefined;
-}
-
-gc();
-for (var i = 0; i < 100; i++) {
-  assertFalse(fired[i]);
-}
-
-// Error objects that are kept alive.
-var array = [];
-for (var i = 0; i < 100; i++) {
-  var error = new Error();
-  var getter = getter_function(i);
-  // Replace the getter to observe whether it has been fired,
-  // and disguise it as original getter.
-  error.__defineGetter__("stack", getter);
-
-  array.push(error);
-  error = undefined;
-}
-
-gc();
-// We don't expect all stack traces to be formatted after only one GC.
-assertTrue(fired[0]);
-
-for (var i = 0; i < 10; i++) gc();
-for (var i = 0; i < 100; i++) assertTrue(fired[i]);
-
-// Error objects with custom stack getter.
-var custom_error = new Error();
-var custom_getter_fired = false;
-custom_error.__defineGetter__("stack",
-                              function() { custom_getter_fired = true; });
-gc();
-assertFalse(custom_getter_fired);
-
-// Check that formatting caused by GC is not somehow observable.
-var error;
-
-var obj = { foo: function foo() { throw new Error(); } };
-
-try {
-  obj.foo();
-} catch (e) {
-  delete obj.foo;
-  Object.defineProperty(obj, 'foo', {
-    get: function() { assertUnreachable(); }
-  });
-  error = e;
-}
-
-gc();
-
-Object.defineProperty(Array.prototype, '0', {
-  get: function() { assertUnreachable(); }
-});
-
-try {
-  throw new Error();
-} catch (e) {
-  error = e;
-}
-
-gc();
-
-String.prototype.indexOf = function() { assertUnreachable(); };
-String.prototype.lastIndexOf = function() { assertUnreachable(); };
-var obj = { method: function() { throw Error(); } };
-try {
-  obj.method();
-} catch (e) {
-  error = e;
-}
-
-gc();