Implement identity hashes for proxies.

test/mjsunit/harmony/proxies-hash.js

+// Copyright 2011 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: --harmony-proxies --harmony-weakmaps
+
+
+// Helper.
+
+function TestWithProxies(test, handler) {
+  test(handler, Proxy.create)
+  test(handler, function(h) {return Proxy.createFunction(h, function() {})})
+}
+
+
+// Weak maps.
+
+function TestWeakMap(fix) {
+  TestWithProxies(TestWeakMap2, fix)
+}
+
+function TestWeakMap2(fix, create) {
+  var handler = {fix: function() { return {} }}
+  var p1 = create(handler)
+  var p2 = create(handler)
+  var p3 = create(handler)
+  fix(p3)
+
+  var m = new WeakMap
+  m.set(p1, 123);
+  m.set(p2, 321);
+  assertSame(123, m.get(p1));
+  assertSame(321, m.get(p2));
+
+  fix(p1)
+  fix(p2)
+  assertSame(123, m.get(p1));
+  assertSame(321, m.get(p2));
+}
+
+TestWeakMap(Object.seal)
+TestWeakMap(Object.freeze)
+TestWeakMap(Object.preventExtensions)