FFI Compiler based on code stub assembler

src/ffi/ffi-compiler.h

+// 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.
+
+#ifndef SRC_FFI_FFI_COMPILER_H_
+#define SRC_FFI_FFI_COMPILER_H_
+
+#include "src/code-stub-assembler.h"
+#include "src/machine-type.h"
+
+namespace v8 {
+namespace internal {
+
+typedef compiler::Node Node;
+typedef compiler::CodeAssemblerState CodeAssemblerState;
+
+void InstallFFIMap(Isolate* isolate);
+
+namespace ffi {
+
+typedef Signature<MachineType> FFISignature;
+
+struct NativeFunction {
+  FFISignature* sig;
+  uint8_t* start;
+};
+
+class FFIAssembler : public CodeStubAssembler {

[Igor Sheludko, 2017/01/18 18:18:14]

Since nobody uses it outside the .cc file, it could be defined there. 

[mattloring, 2017/01/18 18:26:24]

Done.

+ public:
+  explicit FFIAssembler(CodeAssemblerState* state) : CodeStubAssembler(state) {}
+
+  Node* ToJS(Node* node, Node* context, MachineType type);
+
+  Node* FromJS(Node* node, Node* context, MachineType type);
+
+  Handle<Code> GenerateJSToNativeWrapper(NativeFunction* func);
+};
+
+Handle<JSFunction> CompileJSToNativeWrapper(Isolate* isolate,
+                                            Handle<String> name,
+                                            NativeFunction func);
+}  // namespace ffi
+}  // namespace internal
+}  // namespace v8
+
+#endif  // SRC_FFI_FFI_COMPILER_H_