vm: fix symbol access

By using the new SetHandler API instead of SetNamedPropertyHandler, we can
intercept symbols now. This forces us to use Maybes and MaybeLocals more,
since this new API does not have a non-maybe variant.

Fixes: https://github.com/nodejs/io.js/issues/884
PR-URL: https://github.com/nodejs/io.js/pull/1773
Reviewed-By: Fedor Indutny <fedor@indutny.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

1 files changed, 42 insertions, 28 deletions

diff --git a/src/node_contextify.cc b/src/node_contextify.cc
index c5976a56ec..ae043eb376 100644
--- a/src/node_contextify.cc
+++ b/src/node_contextify.cc
@@ -26,6 +26,10 @@ using v8::HandleScope;
 using v8::Integer;
 using v8::Isolate;
 using v8::Local;
+using v8::Maybe;
+using v8::MaybeLocal;
+using v8::Name;
+using v8::NamedPropertyHandlerConfiguration;
 using v8::None;
 using v8::Object;
 using v8::ObjectTemplate;
@@ -202,12 +206,14 @@ class ContextifyContext {
 
     Local<ObjectTemplate> object_template =
         function_template->InstanceTemplate();
-    object_template->SetNamedPropertyHandler(GlobalPropertyGetterCallback,
+
+    NamedPropertyHandlerConfiguration config(GlobalPropertyGetterCallback,
                                              GlobalPropertySetterCallback,
                                              GlobalPropertyQueryCallback,
                                              GlobalPropertyDeleterCallback,
                                              GlobalPropertyEnumeratorCallback,
                                              CreateDataWrapper(env));
+    object_template->SetHandler(config);
 
     Local<Context> ctx = Context::New(env->isolate(), nullptr, object_template);
     if (!ctx.IsEmpty())
@@ -342,7 +348,7 @@ class ContextifyContext {
 
 
   static void GlobalPropertyGetterCallback(
-      Local<String> property,
+      Local<Name> property,
       const PropertyCallbackInfo<Value>& args) {
     Isolate* isolate = args.GetIsolate();
 
@@ -350,22 +356,26 @@ class ContextifyContext {
         Unwrap<ContextifyContext>(args.Data().As<Object>());
 
     Local<Object> sandbox = PersistentToLocal(isolate, ctx->sandbox_);
-    Local<Value> rv = sandbox->GetRealNamedProperty(property);
-    if (rv.IsEmpty()) {
+    MaybeLocal<Value> maybe_rv =
+        sandbox->GetRealNamedProperty(ctx->context(), property);
+    if (maybe_rv.IsEmpty()) {
       Local<Object> proxy_global = PersistentToLocal(isolate,
                                                      ctx->proxy_global_);
-      rv = proxy_global->GetRealNamedProperty(property);
-    }
-    if (!rv.IsEmpty() && rv == ctx->sandbox_) {
-      rv = PersistentToLocal(isolate, ctx->proxy_global_);
+      maybe_rv = proxy_global->GetRealNamedProperty(ctx->context(), property);
     }
 
-    args.GetReturnValue().Set(rv);
+    Local<Value> rv;
+    if (maybe_rv.ToLocal(&rv)) {
+      if (rv == ctx->sandbox_)
+        rv = PersistentToLocal(isolate, ctx->proxy_global_);
+
+      args.GetReturnValue().Set(rv);
+    }
   }
 
 
   static void GlobalPropertySetterCallback(
-      Local<String> property,
+      Local<Name> property,
       Local<Value> value,
       const PropertyCallbackInfo<Value>& args) {
     Isolate* isolate = args.GetIsolate();
@@ -378,7 +388,7 @@ class ContextifyContext {
 
 
   static void GlobalPropertyQueryCallback(
-      Local<String> property,
+      Local<Name> property,
       const PropertyCallbackInfo<Integer>& args) {
     Isolate* isolate = args.GetIsolate();
 
@@ -386,34 +396,38 @@ class ContextifyContext {
         Unwrap<ContextifyContext>(args.Data().As<Object>());
 
     Local<Object> sandbox = PersistentToLocal(isolate, ctx->sandbox_);
-    Local<Object> proxy_global = PersistentToLocal(isolate,
-                                                   ctx->proxy_global_);
-
-    if (sandbox->HasRealNamedProperty(property)) {
-      PropertyAttribute propAttr =
-          sandbox->GetRealNamedPropertyAttributes(property).FromJust();
-      args.GetReturnValue().Set(propAttr);
-    } else if (proxy_global->HasRealNamedProperty(property)) {
-      PropertyAttribute propAttr =
-          proxy_global->GetRealNamedPropertyAttributes(property).FromJust();
-      args.GetReturnValue().Set(propAttr);
-    } else {
-      args.GetReturnValue().Set(None);
+    Maybe<PropertyAttribute> maybe_prop_attr =
+        sandbox->GetRealNamedPropertyAttributes(ctx->context(), property);
+
+    if (maybe_prop_attr.IsNothing()) {
+      Local<Object> proxy_global = PersistentToLocal(isolate,
+          ctx->proxy_global_);
+
+      maybe_prop_attr =
+          proxy_global->GetRealNamedPropertyAttributes(ctx->context(),
+              property);
+    }
+
+    if (maybe_prop_attr.IsJust()) {
+      PropertyAttribute prop_attr = maybe_prop_attr.FromJust();
+      args.GetReturnValue().Set(prop_attr);
     }
   }
 
 
   static void GlobalPropertyDeleterCallback(
-      Local<String> property,
+      Local<Name> property,
       const PropertyCallbackInfo<Boolean>& args) {
     Isolate* isolate = args.GetIsolate();
 
     ContextifyContext* ctx =
         Unwrap<ContextifyContext>(args.Data().As<Object>());
+    Local<Object> sandbox = PersistentToLocal(isolate, ctx->sandbox_);
+
+    Maybe<bool> success = sandbox->Delete(ctx->context(), property);
 
-    bool success = PersistentToLocal(isolate,
-                                     ctx->sandbox_)->Delete(property);
-    args.GetReturnValue().Set(success);
+    if (success.IsJust())
+      args.GetReturnValue().Set(success.FromJust());
   }