Support external startup data in V8.

src/serialize.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 "v8.h"
 
 #include "accessors.h"
 #include "api.h"
 #include "bootstrapper.h"
 #include "deoptimizer.h"
 #include "execution.h"
 #include "global-handles.h"
 #include "ic-inl.h"
 #include "natives.h"
 #include "platform.h"
 #include "runtime.h"
 #include "serialize.h"
 #include "snapshot.h"
+#include "snapshot-source-sink.h"

[Benedikt Meurer, 2014/05/27 04:09:59]

Nit: serialize.h already includes snapshout-source-sink.h.

[vogelheim, 2014/05/27 15:20:23]

Done.

 #include "stub-cache.h"
 #include "v8threads.h"
 
 namespace v8 {
 namespace internal {
 
 
 // -----------------------------------------------------------------------------
 // Coding of external references.
 
@@ skipping 1209 matching lines @@
       }
 
       default:
         UNREACHABLE();
     }
   }
   ASSERT_EQ(limit, current);
 }
 
 
-void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) {
-  ASSERT(integer < 1 << 22);
-  integer <<= 2;
-  int bytes = 1;
-  if (integer > 0xff) bytes = 2;
-  if (integer > 0xffff) bytes = 3;
-  integer |= bytes;
-  Put(static_cast<int>(integer & 0xff), "IntPart1");
-  if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2");
-  if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3");
-}
-
-
 Serializer::Serializer(Isolate* isolate, SnapshotByteSink* sink)
     : isolate_(isolate),
       sink_(sink),
       external_reference_encoder_(new ExternalReferenceEncoder(isolate)),
       root_index_wave_front_(0) {
   // The serializer is meant to be used only to generate initial heap images
   // from a context in which there is only one isolate.
   for (int i = 0; i <= LAST_SPACE; i++) {
     fullness_[i] = 0;
   }
@@ skipping 585 matching lines @@
 
 void Serializer::Pad() {
   // The non-branching GetInt will read up to 3 bytes too far, so we need
   // to pad the snapshot to make sure we don't read over the end.
   for (unsigned i = 0; i < sizeof(int32_t) - 1; i++) {
     sink_->Put(kNop, "Padding");
   }
 }
 
 
-bool SnapshotByteSource::AtEOF() {
-  if (0u + length_ - position_ > 2 * sizeof(uint32_t)) return false;
-  for (int x = position_; x < length_; x++) {
-    if (data_[x] != SerializerDeserializer::nop()) return false;
-  }
-  return true;
-}
-
 } }  // namespace v8::internal