Make snapshot.h usable without objects-inl.h header.

src/snapshot/serialize.h

 // 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.
 
 #ifndef V8_SNAPSHOT_SERIALIZE_H_
 #define V8_SNAPSHOT_SERIALIZE_H_
 
 #include "src/hashmap.h"
-#include "src/isolate.h"
+#include "src/heap/heap.h"
+#include "src/objects.h"
 #include "src/snapshot/snapshot-source-sink.h"
 
 namespace v8 {
 namespace internal {
 
+class Isolate;
 class ScriptData;
 
 static const int kDeoptTableSerializeEntryCount = 64;
 
 // ExternalReferenceTable is a helper class that defines the relationship
 // between external references and their encodings. It is used to build
 // hashmaps in ExternalReferenceEncoder and ExternalReferenceDecoder.
 class ExternalReferenceTable {
  public:
   static ExternalReferenceTable* instance(Isolate* isolate);
@@ skipping 276 matching lines @@
  public:
   static void Iterate(Isolate* isolate, ObjectVisitor* visitor);
 
   static int nop() { return kNop; }
 
   // No reservation for large object space necessary.
   static const int kNumberOfPreallocatedSpaces = LAST_PAGED_SPACE + 1;
   static const int kNumberOfSpaces = LAST_SPACE + 1;
 
  protected:
-  static bool CanBeDeferred(HeapObject* o) {
-    return !o->IsString() && !o->IsScript();
-  }
+  static bool CanBeDeferred(HeapObject* o);
 
   // ---------- byte code range 0x00..0x7f ----------
   // Byte codes in this range represent Where, HowToCode and WhereToPoint.
   // Where the pointed-to object can be found:
   // The static assert below will trigger when the number of preallocated spaces
   // changed. If that happens, update the bytecode ranges in the comments below.
   STATIC_ASSERT(5 == kNumberOfSpaces);
   enum Where {
     // 0x00..0x04  Allocate new object, in specified space.
     kNewObject = 0,
@@ skipping 322 matching lines @@
   Isolate* isolate() const { return isolate_; }
 
   BackReferenceMap* back_reference_map() { return &back_reference_map_; }
   RootIndexMap* root_index_map() { return &root_index_map_; }
 
 #ifdef OBJECT_PRINT
   void CountInstanceType(Map* map, int size);
 #endif  // OBJECT_PRINT
 
  protected:
-  class ObjectSerializer : public ObjectVisitor {
-   public:
-    ObjectSerializer(Serializer* serializer, Object* o, SnapshotByteSink* sink,
-                     HowToCode how_to_code, WhereToPoint where_to_point)
-        : serializer_(serializer),
-          object_(HeapObject::cast(o)),
-          sink_(sink),
-          reference_representation_(how_to_code + where_to_point),
-          bytes_processed_so_far_(0),
-          is_code_object_(o->IsCode()),
-          code_has_been_output_(false) {}
-    void Serialize();
-    void SerializeDeferred();
-    void VisitPointers(Object** start, Object** end);
-    void VisitEmbeddedPointer(RelocInfo* target);
-    void VisitExternalReference(Address* p);
-    void VisitExternalReference(RelocInfo* rinfo);
-    void VisitInternalReference(RelocInfo* rinfo);
-    void VisitCodeTarget(RelocInfo* target);
-    void VisitCodeEntry(Address entry_address);
-    void VisitCell(RelocInfo* rinfo);
-    void VisitRuntimeEntry(RelocInfo* reloc);
-    // Used for seralizing the external strings that hold the natives source.
-    void VisitExternalOneByteString(
-        v8::String::ExternalOneByteStringResource** resource);
-    // We can't serialize a heap with external two byte strings.
-    void VisitExternalTwoByteString(
-        v8::String::ExternalStringResource** resource) {
-      UNREACHABLE();
-    }
-
-   private:
-    void SerializePrologue(AllocationSpace space, int size, Map* map);
-
-    bool SerializeExternalNativeSourceString(
-        int builtin_count,
-        v8::String::ExternalOneByteStringResource** resource_pointer,
-        FixedArray* source_cache, int resource_index);
-
-    enum ReturnSkip { kCanReturnSkipInsteadOfSkipping, kIgnoringReturn };
-    // This function outputs or skips the raw data between the last pointer and
-    // up to the current position.  It optionally can just return the number of
-    // bytes to skip instead of performing a skip instruction, in case the skip
-    // can be merged into the next instruction.
-    int OutputRawData(Address up_to, ReturnSkip return_skip = kIgnoringReturn);
-    // External strings are serialized in a way to resemble sequential strings.
-    void SerializeExternalString();
-
-    Address PrepareCode();
-
-    Serializer* serializer_;
-    HeapObject* object_;
-    SnapshotByteSink* sink_;
-    int reference_representation_;
-    int bytes_processed_so_far_;
-    bool is_code_object_;
-    bool code_has_been_output_;
-  };
-
+  class ObjectSerializer;
   class RecursionScope {
    public:
     explicit RecursionScope(Serializer* serializer) : serializer_(serializer) {
       serializer_->recursion_depth_++;
     }
     ~RecursionScope() { serializer_->recursion_depth_--; }
     bool ExceedsMaximum() {
       return serializer_->recursion_depth_ >= kMaxRecursionDepth;
     }
 
@@ skipping 118 matching lines @@
 
   ~PartialSerializer() { OutputStatistics("PartialSerializer"); }
 
   // Serialize the objects reachable from a single object pointer.
   void Serialize(Object** o);
   virtual void SerializeObject(HeapObject* o, HowToCode how_to_code,
                                WhereToPoint where_to_point, int skip) override;
 
  private:
   int PartialSnapshotCacheIndex(HeapObject* o);
-  bool ShouldBeInThePartialSnapshotCache(HeapObject* o) {
-    // Scripts should be referred only through shared function infos.  We can't
-    // allow them to be part of the partial snapshot because they contain a
-    // unique ID, and deserializing several partial snapshots containing script
-    // would cause dupes.
-    DCHECK(!o->IsScript());
-    return o->IsName() || o->IsSharedFunctionInfo() || o->IsHeapNumber() ||
-           o->IsCode() || o->IsScopeInfo() || o->IsExecutableAccessorInfo() ||
-           o->map() ==
-               startup_serializer_->isolate()->heap()->fixed_cow_array_map();
-  }
+  bool ShouldBeInThePartialSnapshotCache(HeapObject* o);
 
   void SerializeOutdatedContextsAsFixedArray();
 
   Serializer* startup_serializer_;
   List<Context*> outdated_contexts_;
   Object* global_object_;
   PartialCacheIndexMap partial_cache_index_map_;
   DISALLOW_COPY_AND_ASSIGN(PartialSerializer);
 };
 
 
 class StartupSerializer : public Serializer {
  public:
-  StartupSerializer(Isolate* isolate, SnapshotByteSink* sink)
-      : Serializer(isolate, sink), root_index_wave_front_(0) {
-    // Clear the cache of objects used by the partial snapshot.  After the
-    // strong roots have been serialized we can create a partial snapshot
-    // which will repopulate the cache with objects needed by that partial
-    // snapshot.
-    isolate->partial_snapshot_cache()->Clear();
-    InitializeCodeAddressMap();
-  }
-
+  StartupSerializer(Isolate* isolate, SnapshotByteSink* sink);
   ~StartupSerializer() { OutputStatistics("StartupSerializer"); }
 
   // The StartupSerializer has to serialize the root array, which is slightly
   // different.
   void VisitPointers(Object** start, Object** end) override;
 
   // Serialize the current state of the heap.  The order is:
   // 1) Strong references.
   // 2) Partial snapshot cache.
   // 3) Weak references (e.g. the string table).
@@ skipping 126 matching lines @@
     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 { return source->length(); }
+  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 v8::internal
 
 #endif  // V8_SNAPSHOT_SERIALIZE_H_