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// 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();
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