WIP SharedArrayBuffer implementation

test/cctest/test-api.cc

 // Copyright 2012 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
@@ skipping 2822 matching lines @@
   CheckIsTypedArrayVarNeutered("u32a");
   CheckIsTypedArrayVarNeutered("i32a");
   CheckIsTypedArrayVarNeutered("f32a");
   CheckIsTypedArrayVarNeutered("f64a");
 
   CHECK(CompileRun("dv.byteLength == 0 && dv.byteOffset == 0")->IsTrue());
   CheckDataViewIsNeutered(dv);
 }
 
 
+class ScopedSharedArrayBufferContents {
+ public:
+  explicit ScopedSharedArrayBufferContents(
+      const v8::SharedArrayBuffer::Contents& contents)
+      : contents_(contents) {}
+  ~ScopedSharedArrayBufferContents() { free(contents_.Data()); }
+  void* Data() const { return contents_.Data(); }
+  size_t ByteLength() const { return contents_.ByteLength(); }
+
+ private:
+  const v8::SharedArrayBuffer::Contents contents_;
+};
+
+
+THREADED_TEST(SharedArrayBuffer_ApiInternalToExternal) {
+  LocalContext env;
+  v8::Isolate* isolate = env->GetIsolate();
+  v8::HandleScope handle_scope(isolate);
+
+  Local<v8::SharedArrayBuffer> ab = v8::SharedArrayBuffer::New(isolate, 1024);
+  CheckInternalFieldsAreZero(ab);
+  CHECK_EQ(1024, static_cast<int>(ab->ByteLength()));
+  CHECK(!ab->IsExternal());
+  CcTest::heap()->CollectAllGarbage(i::Heap::kNoGCFlags);
+
+  ScopedSharedArrayBufferContents ab_contents(ab->Externalize());
+  CHECK(ab->IsExternal());
+
+  CHECK_EQ(1024, static_cast<int>(ab_contents.ByteLength()));
+  uint8_t* data = static_cast<uint8_t*>(ab_contents.Data());
+  DCHECK(data != NULL);
+  env->Global()->Set(v8_str("ab"), ab);
+
+  v8::Handle<v8::Value> result = CompileRun("ab.byteLength");
+  CHECK_EQ(1024, result->Int32Value());
+
+  result = CompileRun(
+      "var u8 = new SharedUint8Array(ab);"
+      "u8[0] = 0xFF;"
+      "u8[1] = 0xAA;"
+      "u8.length");
+  CHECK_EQ(1024, result->Int32Value());
+  CHECK_EQ(0xFF, data[0]);
+  CHECK_EQ(0xAA, data[1]);
+  data[0] = 0xCC;
+  data[1] = 0x11;
+  result = CompileRun("u8[0] + u8[1]");
+  CHECK_EQ(0xDD, result->Int32Value());
+}
+
+
+THREADED_TEST(SharedArrayBuffer_JSInternalToExternal) {
+  LocalContext env;
+  v8::Isolate* isolate = env->GetIsolate();
+  v8::HandleScope handle_scope(isolate);
+
+
+  v8::Local<v8::Value> result = CompileRun(
+      "var ab1 = new SharedArrayBuffer(2);"
+      "var u8_a = new SharedUint8Array(ab1);"
+      "u8_a[0] = 0xAA;"
+      "u8_a[1] = 0xFF; u8_a.buffer");
+  Local<v8::SharedArrayBuffer> ab1 = Local<v8::SharedArrayBuffer>::Cast(result);
+  CheckInternalFieldsAreZero(ab1);
+  CHECK_EQ(2, static_cast<int>(ab1->ByteLength()));
+  CHECK(!ab1->IsExternal());
+  ScopedSharedArrayBufferContents ab1_contents(ab1->Externalize());
+  CHECK(ab1->IsExternal());
+
+  result = CompileRun("ab1.byteLength");
+  CHECK_EQ(2, result->Int32Value());
+  result = CompileRun("u8_a[0]");
+  CHECK_EQ(0xAA, result->Int32Value());
+  result = CompileRun("u8_a[1]");
+  CHECK_EQ(0xFF, result->Int32Value());
+  result = CompileRun(
+      "var u8_b = new SharedUint8Array(ab1);"
+      "u8_b[0] = 0xBB;"
+      "u8_a[0]");
+  CHECK_EQ(0xBB, result->Int32Value());
+  result = CompileRun("u8_b[1]");
+  CHECK_EQ(0xFF, result->Int32Value());
+
+  CHECK_EQ(2, static_cast<int>(ab1_contents.ByteLength()));
+  uint8_t* ab1_data = static_cast<uint8_t*>(ab1_contents.Data());
+  CHECK_EQ(0xBB, ab1_data[0]);
+  CHECK_EQ(0xFF, ab1_data[1]);
+  ab1_data[0] = 0xCC;
+  ab1_data[1] = 0x11;
+  result = CompileRun("u8_a[0] + u8_a[1]");
+  CHECK_EQ(0xDD, result->Int32Value());
+}
+
+
+THREADED_TEST(SharedArrayBuffer_External) {
+  LocalContext env;
+  v8::Isolate* isolate = env->GetIsolate();
+  v8::HandleScope handle_scope(isolate);
+
+  i::ScopedVector<uint8_t> my_data(100);
+  memset(my_data.start(), 0, 100);
+  Local<v8::SharedArrayBuffer> ab3 =
+      v8::SharedArrayBuffer::New(isolate, my_data.start(), 100);
+  CheckInternalFieldsAreZero(ab3);
+  CHECK_EQ(100, static_cast<int>(ab3->ByteLength()));
+  CHECK(ab3->IsExternal());
+
+  env->Global()->Set(v8_str("ab3"), ab3);
+
+  v8::Handle<v8::Value> result = CompileRun("ab3.byteLength");
+  CHECK_EQ(100, result->Int32Value());
+
+  result = CompileRun(
+      "var u8_b = new SharedUint8Array(ab3);"
+      "u8_b[0] = 0xBB;"
+      "u8_b[1] = 0xCC;"
+      "u8_b.length");
+  CHECK_EQ(100, result->Int32Value());
+  CHECK_EQ(0xBB, my_data[0]);
+  CHECK_EQ(0xCC, my_data[1]);
+  my_data[0] = 0xCC;
+  my_data[1] = 0x11;
+  result = CompileRun("u8_b[0] + u8_b[1]");
+  CHECK_EQ(0xDD, result->Int32Value());
+}
+
+
 THREADED_TEST(HiddenProperties) {
   LocalContext env;
   v8::Isolate* isolate = env->GetIsolate();
   v8::HandleScope scope(isolate);
 
   v8::Local<v8::Object> obj = v8::Object::New(env->GetIsolate());
   v8::Local<v8::String> key = v8_str("api-test::hidden-key");
   v8::Local<v8::String> empty = v8_str("");
   v8::Local<v8::String> prop_name = v8_str("prop_name");
 
@@ skipping 19040 matching lines @@
   }
   {
     v8::TryCatch try_catch;
     uint16_t* data = reinterpret_cast<uint16_t*>(buffer);
     CHECK(v8::String::NewFromTwoByte(isolate, data, v8::String::kNormalString,
                                      length).IsEmpty());
     CHECK(!try_catch.HasCaught());
   }
   free(buffer);
 }