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Unified Diff: test/mjsunit/stack-traces-gc.js

Issue 11880018: Reland r13188, r13194, r13256 (Deferred formatting of error stack trace during GC). (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Fix Created 7 years, 11 months ago
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Index: test/mjsunit/stack-traces-gc.js
diff --git a/test/mjsunit/stack-traces-gc.js b/test/mjsunit/stack-traces-gc.js
new file mode 100644
index 0000000000000000000000000000000000000000..dd878f23b5b258342ccd5d766c63a0f8adbd4b7b
--- /dev/null
+++ b/test/mjsunit/stack-traces-gc.js
@@ -0,0 +1,119 @@
+// 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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