1 files changed, 96 insertions, 0 deletions
diff --git a/deps/v8/src/wasm/wasm-serialization.h b/deps/v8/src/wasm/wasm-serialization.h
new file mode 100644
index 0000000000..40025c23cf
--- /dev/null
+++ b/deps/v8/src/wasm/wasm-serialization.h
@@ -0,0 +1,96 @@
+// 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 V8_WASM_SERIALIZATION_H_
+#define V8_WASM_SERIALIZATION_H_
+
+#include "src/wasm/wasm-heap.h"
+#include "src/wasm/wasm-objects.h"
+
+namespace v8 {
+namespace internal {
+namespace wasm {
+
+class WasmSerializedFormatVersion {
+ public:
+  static size_t GetVersionSize();
+  static bool WriteVersion(Isolate* isolate, Vector<byte>);
+  static bool IsSupportedVersion(Isolate* isolate, const Vector<const byte>);
+
+ private:
+  static constexpr size_t kVersionSize = 4 * sizeof(uint32_t);
+};
+
+enum SerializationSection { Init, Metadata, Stubs, CodeSection, Done };
+
+class V8_EXPORT_PRIVATE NativeModuleSerializer {
+ public:
+  explicit NativeModuleSerializer(Isolate*, const NativeModule*);
+  size_t Measure() const;
+  size_t Write(Vector<byte>);
+  bool IsDone() const { return state_ == Done; }
+  static std::pair<std::unique_ptr<byte[]>, size_t> SerializeWholeModule(
+      Isolate*, Handle<WasmCompiledModule>);
+
+ private:
+  size_t MeasureHeader() const;
+  static size_t GetCodeHeaderSize();
+  size_t MeasureCode(const WasmCode*) const;
+  size_t MeasureCopiedStubs() const;
+  FixedArray* GetHandlerTable(const WasmCode*) const;
+  ByteArray* GetSourcePositions(const WasmCode*) const;
+
+  void BufferHeader();
+  // we buffer all the stubs because they are small
+  void BufferCopiedStubs();
+  void BufferCodeInAllocatedScratch(const WasmCode*);
+  void BufferCurrentWasmCode();
+  size_t DrainBuffer(Vector<byte> dest);
+  uint32_t EncodeBuiltinOrStub(Address);
+
+  Isolate* const isolate_ = nullptr;
+  const NativeModule* const native_module_ = nullptr;
+  SerializationSection state_ = Init;
+  uint32_t index_ = 0;
+  std::vector<byte> scratch_;
+  Vector<byte> remaining_;
+  // wasm and copied stubs reverse lookup
+  std::map<Address, uint32_t> wasm_targets_lookup_;
+  // immovable builtins and runtime entries lookup
+  std::map<Address, uint32_t> reference_table_lookup_;
+  std::map<Address, uint32_t> stub_lookup_;
+  std::map<Address, uint32_t> builtin_lookup_;
+};
+
+class V8_EXPORT_PRIVATE NativeModuleDeserializer {
+ public:
+  explicit NativeModuleDeserializer(Isolate*, NativeModule*);
+  // Currently, we don't support streamed reading, yet albeit the
+  // API suggests that.
+  bool Read(Vector<const byte>);
+  static MaybeHandle<WasmCompiledModule> DeserializeFullBuffer(
+      Isolate*, Vector<const byte> data, Vector<const byte> wire_bytes);
+
+ private:
+  void ExpectHeader();
+  void Expect(size_t size);
+  bool ReadHeader();
+  bool ReadCode();
+  bool ReadStubs();
+  Address GetTrampolineOrStubFromTag(uint32_t);
+
+  Isolate* const isolate_ = nullptr;
+  NativeModule* const native_module_ = nullptr;
+  std::vector<byte> scratch_;
+  std::vector<Address> stubs_;
+  Vector<const byte> unread_;
+  size_t current_expectation_ = 0;
+  uint32_t index_ = 0;
+};
+
+}  // namespace wasm
+}  // namespace internal
+}  // namespace v8
+
+#endif