Hide native Date implementation in function context.

src/snapshot-common.cc

 // Copyright 2006-2008 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.
 
 // The common functionality when building with or without snapshots.
 
 #include "src/v8.h"
 
 #include "src/api.h"
 #include "src/base/platform/platform.h"
@@ skipping 80 matching lines @@
 void CalculateFirstPageSizes(bool is_default_snapshot,
                              const SnapshotData& startup_snapshot,
                              const SnapshotData& context_snapshot,
                              uint32_t* sizes_out) {
   Vector<const SerializedData::Reservation> startup_reservations =
       startup_snapshot.Reservations();
   Vector<const SerializedData::Reservation> context_reservations =
       context_snapshot.Reservations();
   int startup_index = 0;
   int context_index = 0;
+
+  if (FLAG_profile_deserialization) {
+    int startup_total = 0;
+    int context_total = 0;
+    for (auto& reservation : startup_reservations) {
+      startup_total += reservation.chunk_size();
+    }
+    for (auto& reservation : context_reservations) {
+      context_total += reservation.chunk_size();
+    }
+    PrintF(
+        "Deserialization will reserve:\n"
+        "%*d bytes for startup\n"
+        "%*d bytes per context\n",
+        10, startup_total, 10, context_total);
+  }
+
   for (int space = 0; space < i::Serializer::kNumberOfSpaces; space++) {
     bool single_chunk = true;
     while (!startup_reservations[startup_index].is_last()) {
       single_chunk = false;
       startup_index++;
     }
     while (!context_reservations[context_index].is_last()) {
       single_chunk = false;
       context_index++;
     }
@@ skipping 48 matching lines @@
   int length = context_offset + context_length;
   char* data = new char[length];
 
   memcpy(data + kMetadataOffset, &metadata.RawValue(), kInt32Size);
   memcpy(data + kFirstPageSizesOffset, first_page_sizes,
          kNumPagedSpaces * kInt32Size);
   memcpy(data + kStartupLengthOffset, &startup_length, kInt32Size);
   memcpy(data + kStartupDataOffset, startup_data.begin(), startup_length);
   memcpy(data + context_offset, context_data.begin(), context_length);
   v8::StartupData result = {data, length};
+
+  if (FLAG_profile_deserialization) {
+    PrintF(
+        "Snapshot blob consists of:\n"
+        "%*d bytes for startup\n"
+        "%*d bytes for context\n",
+        10, startup_length, 10, context_length);
+  }
   return result;
 }
 
 
 Snapshot::Metadata Snapshot::ExtractMetadata(const v8::StartupData* data) {
   uint32_t raw;
   memcpy(&raw, data->data + kMetadataOffset, kInt32Size);
   return Metadata(raw);
 }
 
@@ skipping 14 matching lines @@
   int startup_length;
   memcpy(&startup_length, data->data + kStartupLengthOffset, kIntSize);
   int context_offset = ContextOffset(startup_length);
   const byte* context_data =
       reinterpret_cast<const byte*>(data->data + context_offset);
   DCHECK_LT(context_offset, data->raw_size);
   int context_length = data->raw_size - context_offset;
   return Vector<const byte>(context_data, context_length);
 }
 } }  // namespace v8::internal