Snapshots: Add --extra-code flag to mksnapshot which lets you specify a file

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 289 matching lines @@
   V(CommentStatistic, paged_space_comments_statistics,                         \
       CommentStatistic::kMaxComments + 1)
 #else
 
 #define ISOLATE_INIT_DEBUG_ARRAY_LIST(V)
 
 #endif
 
 #define ISOLATE_INIT_ARRAY_LIST(V)                                             \
   /* SerializerDeserializer state. */                                          \
-  V(Object*, serialize_partial_snapshot_cache, kPartialSnapshotCacheCapacity)  \
   V(int, jsregexp_static_offsets_vector, kJSRegexpStaticOffsetsVectorSize)     \
   V(int, bad_char_shift_table, kUC16AlphabetSize)                              \
   V(int, good_suffix_shift_table, (kBMMaxShift + 1))                           \
   V(int, suffix_table, (kBMMaxShift + 1))                                      \
   V(uint32_t, private_random_seed, 2)                                          \
   ISOLATE_INIT_DEBUG_ARRAY_LIST(V)
 
 typedef List<HeapObject*, PreallocatedStorageAllocationPolicy> DebugObjectCache;
 
 #define ISOLATE_INIT_LIST(V)                                                   \
   /* SerializerDeserializer state. */                                          \
   V(int, serialize_partial_snapshot_cache_length, 0)                           \
+  V(int, serialize_partial_snapshot_cache_capacity, 0)                         \
+  V(Object**, serialize_partial_snapshot_cache, NULL)                          \
   /* Assembler state. */                                                       \
   /* A previously allocated buffer of kMinimalBufferSize bytes, or NULL. */    \
   V(byte*, assembler_spare_buffer, NULL)                                       \
   V(FatalErrorCallback, exception_behavior, NULL)                              \
   V(AllowCodeGenerationFromStringsCallback, allow_code_gen_callback, NULL)     \
   V(v8::Debug::MessageHandler, message_handler, NULL)                          \
   /* To distinguish the function templates, so that we can find them in the */ \
   /* function cache of the global context. */                                  \
   V(int, next_serial_number, 0)                                                \
   V(ExternalReferenceRedirectorPointer*, external_reference_redirector, NULL)  \
@@ skipping 270 matching lines @@
     thread_local_top_.scheduled_exception_ = heap_.the_hole_value();
   }
 
   bool IsExternallyCaught();
 
   bool is_catchable_by_javascript(MaybeObject* exception) {
     return (exception != Failure::OutOfMemoryException()) &&
         (exception != heap()->termination_exception());
   }
 
+  // Serializer.
+  void PushToPartialSnapshotCache(Object* obj);
+
   // JS execution stack (see frames.h).
   static Address c_entry_fp(ThreadLocalTop* thread) {
     return thread->c_entry_fp_;
   }
   static Address handler(ThreadLocalTop* thread) { return thread->handler_; }
 
   inline Address* c_entry_fp_address() {
     return &thread_local_top_.c_entry_fp_;
   }
   inline Address* handler_address() { return &thread_local_top_.handler_; }
@@ skipping 796 matching lines @@
 
 // Mark the global context with out of memory.
 inline void Context::mark_out_of_memory() {
   global_context()->set_out_of_memory(HEAP->true_value());
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_