Serializer: collect and output memory statistics.

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_SERIALIZE_H_
 #define V8_SERIALIZE_H_
 
 #include "src/hashmap.h"
 #include "src/heap-profiler.h"
 #include "src/isolate.h"
@@ skipping 599 matching lines @@
   ~Serializer();
   void VisitPointers(Object** start, Object** end) OVERRIDE;
 
   void EncodeReservations(List<SerializedData::Reservation>* out) const;
 
   Isolate* isolate() const { return isolate_; }
 
   BackReferenceMap* back_reference_map() { return &back_reference_map_; }
   RootIndexMap* root_index_map() { return &root_index_map_; }
 
+  void CountInstanceType(InstanceType instance_type) {
+    instance_type_count_[instance_type]++;
+  }
+
  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),
@@ skipping 81 matching lines @@
   Code* CopyCode(Code* code);
 
   inline uint32_t max_chunk_size(int space) const {
     DCHECK_LE(0, space);
     DCHECK_LT(space, kNumberOfSpaces);
     return max_chunk_size_[space];
   }
 
   SnapshotByteSink* sink() const { return sink_; }
 
+  void OutputStatistics(const char* name);
+
   Isolate* isolate_;
 
   SnapshotByteSink* sink_;
   ExternalReferenceEncoder external_reference_encoder_;
 
   BackReferenceMap back_reference_map_;
   RootIndexMap root_index_map_;
 
   friend class Deserializer;
   friend class ObjectSerializer;
   friend class SnapshotData;
 
  private:
   CodeAddressMap* code_address_map_;
   // Objects from the same space are put into chunks for bulk-allocation
   // when deserializing. We have to make sure that each chunk fits into a
   // page. So we track the chunk size in pending_chunk_ of a space, but
   // when it exceeds a page, we complete the current chunk and start a new one.
   uint32_t pending_chunk_[kNumberOfPreallocatedSpaces];
   List<uint32_t> completed_chunks_[kNumberOfPreallocatedSpaces];
   uint32_t max_chunk_size_[kNumberOfPreallocatedSpaces];
 
   // We map serialized large objects to indexes for back-referencing.
   uint32_t large_objects_total_size_;
   uint32_t seen_large_objects_index_;
 
   List<byte> code_buffer_;
 
+  static const int kInstanceTypes = 256;
+  int* instance_type_count_;
+
   DISALLOW_COPY_AND_ASSIGN(Serializer);
 };
 
 
 class PartialSerializer : public Serializer {
  public:
   PartialSerializer(Isolate* isolate, Serializer* startup_snapshot_serializer,
                     SnapshotByteSink* sink)
       : Serializer(isolate, sink),
         startup_serializer_(startup_snapshot_serializer),
         outdated_contexts_(0),
         global_object_(NULL) {
     InitializeCodeAddressMap();
   }
 
+  ~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
@@ skipping 22 matching lines @@
   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() { 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).
   virtual void SerializeStrongReferences();
   virtual void SerializeObject(HeapObject* o, HowToCode how_to_code,
@@ skipping 36 matching lines @@
  private:
   CodeSerializer(Isolate* isolate, SnapshotByteSink* sink, String* source,
                  Code* main_code)
       : Serializer(isolate, sink),
         source_(source),
         main_code_(main_code),
         num_internalized_strings_(0) {
     back_reference_map_.AddSourceString(source);
   }
 
+  ~CodeSerializer() { OutputStatistics("CodeSerializer"); }
+
   virtual 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,
@@ skipping 106 matching lines @@
       kNumInternalizedStringsOffset + 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_SERIALIZE_H_