ValueSerializer: Replace use of std::vector with a delegate-allocated buffer.

src/api.cc

 // Copyright 2012 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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 2954 matching lines @@
 
 Maybe<bool> ValueSerializer::Delegate::WriteHostObject(Isolate* v8_isolate,
                                                        Local<Object> object) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
   isolate->ScheduleThrow(*isolate->factory()->NewError(
       isolate->error_function(), i::MessageTemplate::kDataCloneError,
       Utils::OpenHandle(*object)));
   return Nothing<bool>();
 }
 
+void* ValueSerializer::Delegate::ReallocateBufferMemory(void* old_buffer,
+                                                        size_t size,
+                                                        size_t* actual_size) {
+  *actual_size = size;
+  return realloc(old_buffer, size);
+}
+
+void ValueSerializer::Delegate::FreeBufferMemory(void* buffer) {
+  return free(buffer);
+}
+
 struct ValueSerializer::PrivateData {
   explicit PrivateData(i::Isolate* i, ValueSerializer::Delegate* delegate)
       : isolate(i), serializer(i, delegate) {}
   i::Isolate* isolate;
   i::ValueSerializer serializer;
 };
 
 ValueSerializer::ValueSerializer(Isolate* isolate)
     : ValueSerializer(isolate, nullptr) {}
 
@@ skipping 12 matching lines @@
   Maybe<bool> result = private_->serializer.WriteObject(object);
   has_pending_exception = result.IsNothing();
   RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
   return result;
 }
 
 std::vector<uint8_t> ValueSerializer::ReleaseBuffer() {
   return private_->serializer.ReleaseBuffer();
 }
 
+std::pair<uint8_t*, size_t> ValueSerializer::Release() {
+  return private_->serializer.Release();
+}
+
 void ValueSerializer::TransferArrayBuffer(uint32_t transfer_id,
                                           Local<ArrayBuffer> array_buffer) {
   private_->serializer.TransferArrayBuffer(transfer_id,
                                            Utils::OpenHandle(*array_buffer));
 }
 
 void ValueSerializer::TransferSharedArrayBuffer(
     uint32_t transfer_id, Local<SharedArrayBuffer> shared_array_buffer) {
   private_->serializer.TransferArrayBuffer(
       transfer_id, Utils::OpenHandle(*shared_array_buffer));
@@ skipping 6747 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8