Avoid brittle use of .bind in Promise.all

test/mjsunit/es6/promises.js

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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax
 
+// Make sure we don't rely on functions patchable by monkeys.
+var call = Function.prototype.call.call.bind(Function.prototype.call)
+var observe = Object.observe;
+var getOwnPropertyNames = Object.getOwnPropertyNames
+var defineProperty = Object.defineProperty
+
+function clear(o) {
+  if (o === null || (typeof o !== 'object' && typeof o !== 'function')) return
+  clear(o.__proto__)
+  var properties = getOwnPropertyNames(o)
+  for (var i in properties) {
+    clearProp(o, properties[i])
+  }
+}
+
+function clearProp(o, name) {
+  var poisoned = {caller: 0, callee: 0, arguments: 0}
+  try {
+    var x = o[name]
+    o[name] = undefined
+    clear(x)
+  } catch(e) {} // assertTrue(name in poisoned) }
+}
+
+// Find intrinsics and null them out.
+var globals = Object.getOwnPropertyNames(this)
+var whitelist = {Promise: true, TypeError: true}
+for (var i in globals) {
+  var name = globals[i]
+  if (name in whitelist || name[0] === name[0].toLowerCase()) delete globals[i]
+}
+for (var i in globals) {
+  if (globals[i]) clearProp(this, globals[i])
+}
+
+
 var asyncAssertsExpected = 0;
 
 function assertAsyncRan() { ++asyncAssertsExpected }
 
 function assertAsync(b, s) {
   if (b) {
     print(s, "succeeded")
   } else {
     %AbortJS(s + " FAILED!")  // Simply throwing here will have no effect.
   }
   --asyncAssertsExpected
 }
 
 function assertAsyncDone(iteration) {
   var iteration = iteration || 0
   var dummy = {}
-  Object.observe(dummy,
+  observe(dummy,
     function() {
       if (asyncAssertsExpected === 0)
         assertAsync(true, "all")
       else if (iteration > 10)  // Shouldn't take more.
         assertAsync(false, "all")
       else
         assertAsyncDone(iteration + 1)
     }
   )
   dummy.dummy = dummy
@@ skipping 713 matching lines @@
         function(r) { log += "r" + r; reject(r) }
       )
     })
     promise.__proto__ = MyPromise.prototype
     return promise
   }
 
   MyPromise.__proto__ = Promise
   MyPromise.defer = function() {
     log += "d"
-    return this.__proto__.defer.call(this)
+    return call(this.__proto__.defer, this)
   }
 
   MyPromise.prototype.__proto__ = Promise.prototype
   MyPromise.prototype.chain = function(resolve, reject) {
     log += "c"
-    return this.__proto__.__proto__.chain.call(this, resolve, reject)
+    return call(this.__proto__.__proto__.chain, this, resolve, reject)
   }
 
   log = ""
   var p1 = new MyPromise(function(resolve, reject) { resolve(1) })
   var p2 = new MyPromise(function(resolve, reject) { reject(2) })
   var d3 = MyPromise.defer()
   assertTrue(d3.promise instanceof Promise, "subclass/instance")
   assertTrue(d3.promise instanceof MyPromise, "subclass/instance-my3")
   assertTrue(log === "nx1nr2dn", "subclass/create")
 
@@ skipping 19 matching lines @@
   Promise.all([11, Promise.accept(12), 13, MyPromise.accept(14), 15, 16])
   assertTrue(log === "nx14n", "subclass/all/arg")
 
   log = ""
   MyPromise.all([21, Promise.accept(22), 23, MyPromise.accept(24), 25, 26])
   assertTrue(log === "nx24nnx21nnx23nnnx25nnx26n", "subclass/all/self")
 })();
 
 
 assertAsyncDone()