deps: update V8 to 7.6.303.28

PR-URL: https://github.com/nodejs/node/pull/28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/deps/v8/src/builtins/proxy-has-property.tq b/deps/v8/src/builtins/proxy-has-property.tq
new file mode 100644
index 0000000000..ab3898a9c7
--- /dev/null
+++ b/deps/v8/src/builtins/proxy-has-property.tq
@@ -0,0 +1,55 @@
+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include 'src/builtins/builtins-proxy-gen.h'
+
+namespace proxy {
+
+  // ES #sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p
+  // https://tc39.github.io/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p
+  transitioning builtin ProxyHasProperty(implicit context: Context)(
+      proxy: JSProxy, name: Name): Object {
+    assert(IsJSProxy(proxy));
+
+    PerformStackCheck();
+
+    // 1. Assert: IsPropertyKey(P) is true.
+    assert(IsName(name));
+    assert(!IsPrivateSymbol(name));
+
+    try {
+      // 2. Let handler be O.[[ProxyHandler]].
+      // 3. If handler is null, throw a TypeError exception.
+      // 4. Assert: Type(handler) is Object.
+      const handler =
+          Cast<JSReceiver>(proxy.handler) otherwise ThrowProxyHandlerRevoked;
+
+      // 5. Let target be O.[[ProxyTarget]].
+      const target = proxy.target;
+
+      // 6. Let trap be ? GetMethod(handler, "has").
+      // 7. If trap is undefined, then (see 7.a below).
+      const trap: Callable = GetMethod(handler, 'has')
+          otherwise goto TrapUndefined(target);
+
+      // 8. Let booleanTrapResult be ToBoolean(? Call(trap, handler, «
+      // target»)).
+      // 9. If booleanTrapResult is false, then (see 9.a. in
+      // CheckHasTrapResult).
+      // 10. Return booleanTrapResult.
+      const trapResult = Call(context, trap, handler, target, name);
+      if (BranchIfToBooleanIsTrue(trapResult)) {
+        return True;
+      }
+      return CheckHasTrapResult(target, proxy, name);
+    }
+    label TrapUndefined(target: Object) {
+      // 7.a. Return ? target.[[HasProperty]](P).
+      tail HasProperty(target, name);
+    }
+    label ThrowProxyHandlerRevoked deferred {
+      ThrowTypeError(kProxyRevoked, 'has');
+    }
+  }
+}