Runtime version of declarative native accessors.

test/cctest/test-declarative-accessors.cc

+// Copyright 2013 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.
+
+#include <stdlib.h>
+
+#include "v8.h"
+
+#include "cctest.h"
+
+using namespace v8::internal;
+
+
+class HandleArray : public Malloced {
+ public:
+  static const unsigned kArraySize = 200;
+  explicit HandleArray() {}
+  ~HandleArray() { Reset(v8::Isolate::GetCurrent()); }
+  void Reset(v8::Isolate* isolate) {
+    for (unsigned i = 0; i < kArraySize; i++) {
+      if (handles_[i].IsEmpty()) continue;
+      handles_[i].Dispose(isolate);
+      handles_[i].Clear();
+    }
+  }
+  v8::Persistent<v8::Value> handles_[kArraySize];
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HandleArray);
+};
+
+
+// An aligned character array of size 1024.
+class AlignedArray : public Malloced {
+ public:
+  static const unsigned kArraySize = 1024/sizeof(uint64_t);
+  AlignedArray() { Reset(); }
+
+  void Reset() {
+    for (unsigned i = 0; i < kArraySize; i++) {
+      data_[i] = 0;
+    }
+  }
+
+  template<typename T>
+  T As() { return reinterpret_cast<T>(data_); }
+
+ private:
+  uint64_t data_[kArraySize];
+  DISALLOW_COPY_AND_ASSIGN(AlignedArray);
+};
+
+
+class DescriptorTestHelper {
+ public:
+  DescriptorTestHelper() :
+      isolate_(NULL), array_(new AlignedArray), handle_array_(new HandleArray) {
+    v8::V8::Initialize();
+    isolate_ = v8::Isolate::GetCurrent();
+  }
+  v8::Isolate* isolate_;
+  // Data objects.
+  SmartPointer<AlignedArray> array_;
+  SmartPointer<HandleArray> handle_array_;
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DescriptorTestHelper);
+};
+
+
+static v8::Local<v8::ObjectTemplate> CreateConstructor(
+    v8::Handle<v8::Context> context,
+    const char* class_name,
+    int internal_field,
+    const char* descriptor_name = NULL,
+    v8::Handle<v8::DeclaredAccessorDescriptor> descriptor =
+        v8::Handle<v8::DeclaredAccessorDescriptor>()) {
+  v8::Local<v8::FunctionTemplate> constructor = v8::FunctionTemplate::New();
+  v8::Local<v8::ObjectTemplate> obj_template = constructor->InstanceTemplate();
+  // Setup object template.
+  if (descriptor_name != NULL && !descriptor.IsEmpty()) {
+    bool added_accessor =
+        obj_template->SetAccessor(v8_str(descriptor_name), descriptor);
+    CHECK(added_accessor);
+  }
+  obj_template->SetInternalFieldCount((internal_field+1)*2 + 7);
+  context->Global()->Set(v8_str(class_name), constructor->GetFunction());
+  return obj_template;
+}
+
+
+static void VerifyRead(v8::Handle<v8::DeclaredAccessorDescriptor> descriptor,
+                       int internal_field,
+                       void* internal_object,
+                       v8::Handle<v8::Value> expected_value) {
+  v8::HandleScope scope;
+  LocalContext local_context;
+  v8::Handle<v8::Context> context = local_context.local();
+  CreateConstructor(context, "Accessible", internal_field, "x", descriptor);
+  // Setup object.
+  CompileRun("var accessible = new Accessible();");
+  v8::Local<v8::Object> obj(
+      v8::Object::Cast(*context->Global()->Get(v8_str("accessible"))));
+  obj->SetAlignedPointerInInternalField(internal_field, internal_object);
+  bool added_accessor;
+  added_accessor = obj->SetAccessor(v8_str("y"), descriptor);
+  CHECK(added_accessor);
+  added_accessor = obj->SetAccessor(v8_str("13"), descriptor);
+  CHECK(added_accessor);
+  // Test access from template getter.
+  v8::Local<v8::Value> value;
+  value = CompileRun("accessible.x;");
+  CHECK_EQ(expected_value, value);
+  value = CompileRun("accessible['x'];");
+  CHECK_EQ(expected_value, value);
+  // Test access from object getter.
+  value = CompileRun("accessible.y;");
+  CHECK_EQ(expected_value, value);
+  value = CompileRun("accessible['y'];");
+  CHECK_EQ(expected_value, value);
+  value = CompileRun("accessible[13];");
+  CHECK_EQ(expected_value, value);
+  value = CompileRun("accessible['13'];");
+  CHECK_EQ(expected_value, value);
+}
+
+
+static v8::Handle<v8::Value> Convert(int32_t value, v8::Isolate* isolate) {
+  return v8::Integer::New(value, isolate);
+}
+
+
+static v8::Handle<v8::Value> Convert(float value, v8::Isolate*) {
+  return v8::Number::New(value);
+}
+
+
+static v8::Handle<v8::Value> Convert(double value, v8::Isolate*) {
+  return v8::Number::New(value);
+}
+
+
+template<typename T>
+static void TestPrimitiveValue(
+    T value,
+    v8::DeclaredAccessorDescriptorDataType data_type,
+    DescriptorTestHelper* helper) {
+  v8::HandleScope handle_scope;
+  int index = 17;
+  int internal_field = 6;
+  v8::Handle<v8::DeclaredAccessorDescriptor> descriptor =
+      v8::ObjectOperationDescriptor::New(helper->isolate_, internal_field)
+      ->NewRawShift(helper->isolate_, index*sizeof(T))
+      ->NewPrimitiveValue(helper->isolate_, data_type, 0);
+  v8::Handle<v8::Value> expected = Convert(value, helper->isolate_);
+  helper->array_->Reset();
+  helper->array_->As<T*>()[index] = value;
+  VerifyRead(descriptor, internal_field, *helper->array_, expected);
+}
+
+
+TEST(PrimitiveValueRead) {
+  DescriptorTestHelper helper;
+  TestPrimitiveValue<int32_t>(203, v8::kDescriptorInt32Type, &helper);
+  TestPrimitiveValue<float>(23.7f, v8::kDescriptorFloatType, &helper);
+  TestPrimitiveValue<double>(23.7, v8::kDescriptorDoubleType, &helper);
+}
+
+
+template<typename T>
+static void TestBitmaskCompare(T bitmask,
+                               T compare_value,
+                               DescriptorTestHelper* helper) {
+  v8::HandleScope handle_scope;
+  int index = 13;
+  int internal_field = 4;
+  v8::Handle<v8::RawOperationDescriptor> raw_descriptor =
+      v8::ObjectOperationDescriptor::New(helper->isolate_, internal_field)
+      ->NewRawShift(helper->isolate_, index*sizeof(T));
+  v8::Handle<v8::DeclaredAccessorDescriptor> descriptor;
+  switch (sizeof(T)) {
+    case 1:
+      descriptor =raw_descriptor->NewBitmaskCompare8(
+          helper->isolate_, bitmask, compare_value);
+      break;
+    case 2:
+      descriptor = raw_descriptor->NewBitmaskCompare16(
+          helper->isolate_, bitmask, compare_value);
+      break;
+    case 4:
+      descriptor = raw_descriptor->NewBitmaskCompare32(
+          helper->isolate_, bitmask, compare_value);
+      break;
+    default:
+      CHECK(false);
+      break;
+  }
+  AlignedArray* array = *helper->array_;
+  array->Reset();
+  VerifyRead(descriptor, internal_field, array, v8::False(helper->isolate_));
+  array->As<T*>()[index] = compare_value;
+  VerifyRead(descriptor, internal_field, array, v8::True(helper->isolate_));
+  helper->array_->As<T*>()[index] = compare_value & bitmask;
+  VerifyRead(descriptor, internal_field, array, v8::True(helper->isolate_));
+}
+
+
+TEST(BitmaskCompareRead) {
+  DescriptorTestHelper helper;
+  TestBitmaskCompare<uint8_t>(0xf3, 0xa8, &helper);
+  TestBitmaskCompare<uint16_t>(0xfefe, 0x7d42, &helper);
+  TestBitmaskCompare<uint32_t>(0xfefeab18, 0x1234fdec, &helper);
+}
+
+
+TEST(PointerCompareRead) {
+  DescriptorTestHelper helper;
+  v8::HandleScope handle_scope;
+  int index = 35;
+  int internal_field = 3;
+  void* ptr = helper.isolate_;
+  v8::Handle<v8::DeclaredAccessorDescriptor> descriptor =
+      v8::ObjectOperationDescriptor::New(helper.isolate_, internal_field)
+      ->NewRawShift(helper.isolate_, index*sizeof(ptr))
+      ->NewPointerCompare(helper.isolate_, ptr);
+  AlignedArray* array = *helper.array_;
+  VerifyRead(descriptor, internal_field, array, v8::False(helper.isolate_));
+  array->As<uintptr_t*>()[index] = reinterpret_cast<uintptr_t>(ptr);
+  VerifyRead(descriptor, internal_field, array, v8::True(helper.isolate_));
+}
+
+
+TEST(PointerDereferenceRead) {
+  DescriptorTestHelper helper;
+  v8::HandleScope handle_scope;
+  int first_index = 13;
+  int internal_field = 7;
+  int second_index = 11;
+  int pointed_to_index = 75;
+  uint16_t expected = 0x1425;
+  v8::Handle<v8::DeclaredAccessorDescriptor> descriptor =
+      v8::ObjectOperationDescriptor::New(helper.isolate_, internal_field)
+      ->NewRawShift(helper.isolate_, first_index*kPointerSize)
+      ->NewRawDereference(helper.isolate_)
+      ->NewRawShift(helper.isolate_, second_index*sizeof(int16_t))
+      ->NewPrimitiveValue(helper.isolate_, v8::kDescriptorInt16Type, 0);
+  AlignedArray* array = *helper.array_;
+  array->As<uintptr_t**>()[first_index] =
+      &array->As<uintptr_t*>()[pointed_to_index];
+  VerifyRead(descriptor, internal_field, array, v8::Integer::New(0));
+  second_index += pointed_to_index*sizeof(uintptr_t)/sizeof(uint16_t);
+  array->As<uint16_t*>()[second_index] = expected;
+  VerifyRead(descriptor, internal_field, array, v8::Integer::New(expected));
+}
+
+
+TEST(HandleDereferenceRead) {
+  DescriptorTestHelper helper;
+  v8::HandleScope handle_scope;
+  int index = 13;
+  int internal_field = 0;
+  v8::Handle<v8::DeclaredAccessorDescriptor> descriptor =
+      v8::ObjectOperationDescriptor::New(helper.isolate_, internal_field)
+      ->NewRawShift(helper.isolate_, index*kPointerSize)
+      ->NewHandleDereference(helper.isolate_);
+  HandleArray* array = *helper.handle_array_;
+  v8::Handle<v8::String> expected = v8_str("whatever");
+  array->handles_[index] = v8::Persistent<v8::Value>::New(expected);
+  VerifyRead(descriptor, internal_field, array, expected);
+}
+