Optionally invoke an interceptor on failed access checks

test/cctest/test-access-checks.cc

+// Copyright 2016 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 <stdlib.h>
+
+#include "test/cctest/cctest.h"
+
+namespace {
+
+int32_t g_cross_context_int = 0;
+
+void NamedGetter(v8::Local<v8::Name> property,
+                 const v8::PropertyCallbackInfo<v8::Value>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  if (property->Equals(context, v8_str("cross_context_int")).FromJust())
+    info.GetReturnValue().Set(g_cross_context_int);
+}
+
+void NamedSetter(v8::Local<v8::Name> property, v8::Local<v8::Value> value,
+                 const v8::PropertyCallbackInfo<v8::Value>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  if (!property->Equals(context, v8_str("cross_context_int")).FromJust())
+    return;
+  if (value->IsInt32()) {
+    g_cross_context_int = value->ToInt32(context).ToLocalChecked()->Value();
+  }
+  info.GetReturnValue().Set(value);
+}
+
+void NamedQuery(v8::Local<v8::Name> property,
+                const v8::PropertyCallbackInfo<v8::Integer>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  if (!property->Equals(context, v8_str("cross_context_int")).FromJust())
+    return;
+  info.GetReturnValue().Set(v8::DontDelete);
+}
+
+void NamedDeleter(v8::Local<v8::Name> property,
+                  const v8::PropertyCallbackInfo<v8::Boolean>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  if (!property->Equals(context, v8_str("cross_context_int")).FromJust())
+    return;
+  info.GetReturnValue().Set(false);
+}
+
+void NamedEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  v8::Local<v8::Array> names = v8::Array::New(isolate, 1);
+  names->Set(context, 0, v8_str("cross_context_int")).FromJust();
+  info.GetReturnValue().Set(names);
+}
+
+void IndexedGetter(uint32_t index,
+                   const v8::PropertyCallbackInfo<v8::Value>& info) {
+  if (index == 7) info.GetReturnValue().Set(g_cross_context_int);
+}
+
+void IndexedSetter(uint32_t index, v8::Local<v8::Value> value,
+                   const v8::PropertyCallbackInfo<v8::Value>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  if (index != 7) return;
+  if (value->IsInt32()) {
+    g_cross_context_int = value->ToInt32(context).ToLocalChecked()->Value();
+  }
+  info.GetReturnValue().Set(value);
+}
+
+void IndexedQuery(uint32_t index,
+                  const v8::PropertyCallbackInfo<v8::Integer>& info) {
+  if (index == 7) info.GetReturnValue().Set(v8::DontDelete);
+}
+
+void IndexedDeleter(uint32_t index,
+                    const v8::PropertyCallbackInfo<v8::Boolean>& info) {
+  if (index == 7) info.GetReturnValue().Set(false);
+}
+
+void IndexedEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  v8::Local<v8::Array> names = v8::Array::New(isolate, 1);
+  names->Set(context, 0, v8_str("7")).FromJust();
+  info.GetReturnValue().Set(names);
+}
+
+bool AccessCheck(v8::Local<v8::Context> accessing_context,
+                 v8::Local<v8::Object> accessed_object,
+                 v8::Local<v8::Value> data) {
+  return false;
+}
+
+void GetCrossContextInt(v8::Local<v8::String> property,
+                        const v8::PropertyCallbackInfo<v8::Value>& info) {
+  info.GetReturnValue().Set(g_cross_context_int);
+}
+
+void SetCrossContextInt(v8::Local<v8::String> property,
+                        v8::Local<v8::Value> value,
+                        const v8::PropertyCallbackInfo<void>& info) {
+  v8::Isolate* isolate = info.GetIsolate();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  if (value->IsInt32()) {
+    g_cross_context_int = value->ToInt32(context).ToLocalChecked()->Value();
+  }
+}
+
+void Return42(v8::Local<v8::String> property,
+              const v8::PropertyCallbackInfo<v8::Value>& info) {
+  info.GetReturnValue().Set(42);
+}
+
+}  // namespace
+
+TEST(AccessCheckWithInterceptor) {
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::HandleScope scope(isolate);
+  v8::Local<v8::ObjectTemplate> global_template =
+      v8::ObjectTemplate::New(isolate);
+  global_template->SetAccessCheckCallbackAndHandler(
+      AccessCheck,
+      v8::NamedPropertyHandlerConfiguration(
+          NamedGetter, NamedSetter, NamedQuery, NamedDeleter, NamedEnumerator),
+      v8::IndexedPropertyHandlerConfiguration(IndexedGetter, IndexedSetter,
+                                              IndexedQuery, IndexedDeleter,
+                                              IndexedEnumerator));
+  global_template->SetNativeDataProperty(
+      v8_str("cross_context_int"), GetCrossContextInt, SetCrossContextInt);
+  global_template->SetNativeDataProperty(
+      v8_str("all_can_read"), Return42, nullptr, v8::Local<v8::Value>(),
+      v8::None, v8::Local<v8::AccessorSignature>(), v8::ALL_CAN_READ);
+
+  v8::Local<v8::Context> context0 =
+      v8::Context::New(isolate, nullptr, global_template);
+  context0->Enter();
+
+  // Running script in this context should work.
+  CompileRunChecked(isolate, "this.foo = 42; this[23] = true;");
+  ExpectInt32("this.all_can_read", 42);
+  CompileRunChecked(isolate, "this.cross_context_int = 23");
+  CHECK_EQ(g_cross_context_int, 23);
+  ExpectInt32("this.cross_context_int", 23);
+
+  // Create another context.
+  {
+    v8::HandleScope other_scope(isolate);
+    v8::Local<v8::Context> context1 =
+        v8::Context::New(isolate, nullptr, global_template);
+    context1->Global()
+        ->Set(context1, v8_str("other"), context0->Global())
+        .FromJust();
+    v8::Context::Scope context_scope(context1);
+
+    {
+      v8::TryCatch try_catch(isolate);
+      CHECK(CompileRun(context1, "this.other.foo").IsEmpty());
+    }
+    {
+      v8::TryCatch try_catch(isolate);
+      CHECK(CompileRun(context1, "this.other[23]").IsEmpty());
+    }
+
+    // AllCanRead properties are also inaccessible.
+    {
+      v8::TryCatch try_catch(isolate);
+      CHECK(CompileRun(context1, "this.other.all_can_read").IsEmpty());
+    }
+
+    // Intercepted properties are accessible, however.
+    ExpectInt32("this.other.cross_context_int", 23);
+    CompileRunChecked(isolate, "this.other.cross_context_int = 42");
+    ExpectInt32("this.other[7]", 42);
+    ExpectString("JSON.stringify(Object.getOwnPropertyNames(this.other))",
+                 "[\"7\",\"cross_context_int\"]");
+  }
+}