FFI Compiler based on code stub assembler

test/cctest/ffi/test-ffi.cc

+// Copyright 2017 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/codegen.h"
+#include "src/ffi/ffi-compiler.h"
+#include "test/cctest/cctest.h"
+
+namespace v8 {
+namespace internal {
+namespace ffi {
+
+static void hello_world() { printf("hello world from native code\n"); }
+
+TEST(Run_FFI_Hello) {
+  Isolate* isolate = CcTest::InitIsolateOnce();
+  HandleScope scope(isolate);
+
+  Handle<String> name =
+      isolate->factory()->InternalizeUtf8String("hello_world");
+  Handle<Object> undefined = isolate->factory()->undefined_value();
+
+  AccountingAllocator allocator;
+  Zone zone(&allocator, ZONE_NAME);
+  FFISignature::Builder sig_builder(&zone, 0, 0);
+  NativeFunction func = {sig_builder.Build(),
+                         reinterpret_cast<uint8_t*>(hello_world)};
+
+  Handle<JSFunction> jsfunc = CompileJSToNativeWrapper(isolate, name, func);
+
+  Handle<Object> result =
+      Execution::Call(isolate, jsfunc, undefined, 0, nullptr).ToHandleChecked();
+
+  CHECK(result->IsUndefined(isolate));
+}
+
+}  // namespace ffi
+}  // namespace internal
+}  // namespace v8