Upgrade V8 to 5.1.281.57 DO NOT MERGE
FPIIM-449
Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)
diff --git a/src/snapshot/code-serializer.h b/src/snapshot/code-serializer.h
new file mode 100644
index 0000000..b217fff
--- /dev/null
+++ b/src/snapshot/code-serializer.h
@@ -0,0 +1,127 @@
+// Copyright 2016 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_SNAPSHOT_CODE_SERIALIZER_H_
+#define V8_SNAPSHOT_CODE_SERIALIZER_H_
+
+#include "src/parsing/preparse-data.h"
+#include "src/snapshot/serializer.h"
+
+namespace v8 {
+namespace internal {
+
+class CodeSerializer : public Serializer {
+ public:
+ static ScriptData* Serialize(Isolate* isolate,
+ Handle<SharedFunctionInfo> info,
+ Handle<String> source);
+
+ MUST_USE_RESULT static MaybeHandle<SharedFunctionInfo> Deserialize(
+ Isolate* isolate, ScriptData* cached_data, Handle<String> source);
+
+ static const int kSourceObjectIndex = 0;
+ STATIC_ASSERT(kSourceObjectReference == kSourceObjectIndex);
+
+ static const int kCodeStubsBaseIndex = 1;
+
+ String* source() const {
+ DCHECK(!AllowHeapAllocation::IsAllowed());
+ return source_;
+ }
+
+ const List<uint32_t>* stub_keys() const { return &stub_keys_; }
+
+ private:
+ CodeSerializer(Isolate* isolate, SnapshotByteSink* sink, String* source)
+ : Serializer(isolate, sink), source_(source) {
+ back_reference_map_.AddSourceString(source);
+ }
+
+ ~CodeSerializer() override { OutputStatistics("CodeSerializer"); }
+
+ void SerializeObject(HeapObject* o, HowToCode how_to_code,
+ WhereToPoint where_to_point, int skip) override;
+
+ void SerializeBuiltin(int builtin_index, HowToCode how_to_code,
+ WhereToPoint where_to_point);
+ void SerializeIC(Code* ic, HowToCode how_to_code,
+ WhereToPoint where_to_point);
+ void SerializeCodeStub(uint32_t stub_key, HowToCode how_to_code,
+ WhereToPoint where_to_point);
+ void SerializeGeneric(HeapObject* heap_object, HowToCode how_to_code,
+ WhereToPoint where_to_point);
+ int AddCodeStubKey(uint32_t stub_key);
+
+ DisallowHeapAllocation no_gc_;
+ String* source_;
+ List<uint32_t> stub_keys_;
+ DISALLOW_COPY_AND_ASSIGN(CodeSerializer);
+};
+
+// Wrapper around ScriptData to provide code-serializer-specific functionality.
+class SerializedCodeData : public SerializedData {
+ public:
+ // Used when consuming.
+ static SerializedCodeData* FromCachedData(Isolate* isolate,
+ ScriptData* cached_data,
+ String* source);
+
+ // Used when producing.
+ SerializedCodeData(const List<byte>& payload, const CodeSerializer& cs);
+
+ // Return ScriptData object and relinquish ownership over it to the caller.
+ ScriptData* GetScriptData();
+
+ Vector<const Reservation> Reservations() const;
+ Vector<const byte> Payload() const;
+
+ Vector<const uint32_t> CodeStubKeys() const;
+
+ private:
+ explicit SerializedCodeData(ScriptData* data);
+
+ enum SanityCheckResult {
+ CHECK_SUCCESS = 0,
+ MAGIC_NUMBER_MISMATCH = 1,
+ VERSION_MISMATCH = 2,
+ SOURCE_MISMATCH = 3,
+ CPU_FEATURES_MISMATCH = 4,
+ FLAGS_MISMATCH = 5,
+ CHECKSUM_MISMATCH = 6
+ };
+
+ SanityCheckResult SanityCheck(Isolate* isolate, String* source) const;
+
+ uint32_t SourceHash(String* source) const;
+
+ // The data header consists of uint32_t-sized entries:
+ // [0] magic number and external reference count
+ // [1] version hash
+ // [2] source hash
+ // [3] cpu features
+ // [4] flag hash
+ // [5] number of code stub keys
+ // [6] number of reservation size entries
+ // [7] payload length
+ // [8] payload checksum part 1
+ // [9] payload checksum part 2
+ // ... reservations
+ // ... code stub keys
+ // ... serialized payload
+ static const int kVersionHashOffset = kMagicNumberOffset + kInt32Size;
+ static const int kSourceHashOffset = kVersionHashOffset + kInt32Size;
+ static const int kCpuFeaturesOffset = kSourceHashOffset + kInt32Size;
+ static const int kFlagHashOffset = kCpuFeaturesOffset + kInt32Size;
+ static const int kNumReservationsOffset = kFlagHashOffset + kInt32Size;
+ static const int kNumCodeStubKeysOffset = kNumReservationsOffset + kInt32Size;
+ static const int kPayloadLengthOffset = kNumCodeStubKeysOffset + kInt32Size;
+ static const int kChecksum1Offset = kPayloadLengthOffset + kInt32Size;
+ static const int kChecksum2Offset = kChecksum1Offset + kInt32Size;
+ static const int kHeaderSize = kChecksum2Offset + kInt32Size;
+};
+
+} // namespace internal
+} // namespace v8
+
+#endif // V8_SNAPSHOT_CODE_SERIALIZER_H_