Version 3.8.6

src/heap.cc

 // Copyright 2011 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 158 matching lines @@
   }
 
   memset(roots_, 0, sizeof(roots_[0]) * kRootListLength);
   global_contexts_list_ = NULL;
   mark_compact_collector_.heap_ = this;
   external_string_table_.heap_ = this;
 }
 
 
 intptr_t Heap::Capacity() {
-  if (!HasBeenSetup()) return 0;
+  if (!HasBeenSetUp()) return 0;
 
   return new_space_.Capacity() +
       old_pointer_space_->Capacity() +
       old_data_space_->Capacity() +
       code_space_->Capacity() +
       map_space_->Capacity() +
       cell_space_->Capacity();
 }
 
 
 intptr_t Heap::CommittedMemory() {
-  if (!HasBeenSetup()) return 0;
+  if (!HasBeenSetUp()) return 0;
 
   return new_space_.CommittedMemory() +
       old_pointer_space_->CommittedMemory() +
       old_data_space_->CommittedMemory() +
       code_space_->CommittedMemory() +
       map_space_->CommittedMemory() +
       cell_space_->CommittedMemory() +
       lo_space_->Size();
 }
 
 intptr_t Heap::CommittedMemoryExecutable() {
-  if (!HasBeenSetup()) return 0;
+  if (!HasBeenSetUp()) return 0;
 
   return isolate()->memory_allocator()->SizeExecutable();
 }
 
 
 intptr_t Heap::Available() {
-  if (!HasBeenSetup()) return 0;
+  if (!HasBeenSetUp()) return 0;
 
   return new_space_.Available() +
       old_pointer_space_->Available() +
       old_data_space_->Available() +
       code_space_->Available() +
       map_space_->Available() +
       cell_space_->Available();
 }
 
 
-bool Heap::HasBeenSetup() {
+bool Heap::HasBeenSetUp() {
   return old_pointer_space_ != NULL &&
          old_data_space_ != NULL &&
          code_space_ != NULL &&
          map_space_ != NULL &&
          cell_space_ != NULL &&
          lo_space_ != NULL;
 }
 
 
 int Heap::GcSafeSizeOfOldObject(HeapObject* object) {
@@ skipping 1115 matching lines @@
                         Context::NEXT_CONTEXT_LINK,
                         Heap::undefined_value(),
                         UPDATE_WRITE_BARRIER);
   }
 
   // Update the head of the list of contexts.
   global_contexts_list_ = head;
 }
 
 
+void Heap::VisitExternalResources(v8::ExternalResourceVisitor* visitor) {
+  AssertNoAllocation no_allocation;
+
+  class VisitorAdapter : public ObjectVisitor {
+   public:
+    explicit VisitorAdapter(v8::ExternalResourceVisitor* visitor)
+        : visitor_(visitor) {}
+    virtual void VisitPointers(Object** start, Object** end) {
+      for (Object** p = start; p < end; p++) {
+        if ((*p)->IsExternalString()) {
+          visitor_->VisitExternalString(Utils::ToLocal(
+              Handle<String>(String::cast(*p))));
+        }
+      }
+    }
+   private:
+    v8::ExternalResourceVisitor* visitor_;
+  } visitor_adapter(visitor);
+  external_string_table_.Iterate(&visitor_adapter);
+}
+
+
 class NewSpaceScavenger : public StaticNewSpaceVisitor<NewSpaceScavenger> {
  public:
   static inline void VisitPointer(Heap* heap, Object** p) {
     Object* object = *p;
     if (!heap->InNewSpace(object)) return;
     Heap::ScavengeObject(reinterpret_cast<HeapObject**>(p),
                          reinterpret_cast<HeapObject*>(object));
   }
 };
 
@@ skipping 495 matching lines @@
   code_cache->set_normal_type_cache(undefined_value(), SKIP_WRITE_BARRIER);
   return code_cache;
 }
 
 
 MaybeObject* Heap::AllocatePolymorphicCodeCache() {
   return AllocateStruct(POLYMORPHIC_CODE_CACHE_TYPE);
 }
 
 
+MaybeObject* Heap::AllocateAccessorPair() {
+  Object* result;
+  { MaybeObject* maybe_result = AllocateStruct(ACCESSOR_PAIR_TYPE);
+    if (!maybe_result->ToObject(&result)) return maybe_result;
+  }
+  AccessorPair* accessors = AccessorPair::cast(result);
+  // Later we will have to distinguish between undefined and the hole...
+  // accessors->set_getter(the_hole_value(), SKIP_WRITE_BARRIER);
+  // accessors->set_setter(the_hole_value(), SKIP_WRITE_BARRIER);
+  return accessors;
+}
+
+
 const Heap::StringTypeTable Heap::string_type_table[] = {
 #define STRING_TYPE_ELEMENT(type, size, name, camel_name)                      \
   {type, size, k##camel_name##MapRootIndex},
   STRING_TYPE_LIST(STRING_TYPE_ELEMENT)
 #undef STRING_TYPE_ELEMENT
 };
 
 
 const Heap::ConstantSymbolTable Heap::constant_symbol_table[] = {
 #define CONSTANT_SYMBOL_ELEMENT(name, contents)                                \
@@ skipping 539 matching lines @@
 
   // Allocate the foreign for __proto__.
   { MaybeObject* maybe_obj =
         AllocateForeign((Address) &Accessors::ObjectPrototype);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_prototype_accessors(Foreign::cast(obj));
 
   // Allocate the code_stubs dictionary. The initial size is set to avoid
   // expanding the dictionary during bootstrapping.
-  { MaybeObject* maybe_obj = NumberDictionary::Allocate(128);
+  { MaybeObject* maybe_obj = UnseededNumberDictionary::Allocate(128);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
-  set_code_stubs(NumberDictionary::cast(obj));
+  set_code_stubs(UnseededNumberDictionary::cast(obj));
 
 
   // Allocate the non_monomorphic_cache used in stub-cache.cc. The initial size
   // is set to avoid expanding the dictionary during bootstrapping.
-  { MaybeObject* maybe_obj = NumberDictionary::Allocate(64);
+  { MaybeObject* maybe_obj = UnseededNumberDictionary::Allocate(64);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
-  set_non_monomorphic_cache(NumberDictionary::cast(obj));
+  set_non_monomorphic_cache(UnseededNumberDictionary::cast(obj));
 
   { MaybeObject* maybe_obj = AllocatePolymorphicCodeCache();
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_polymorphic_code_cache(PolymorphicCodeCache::cast(obj));
 
   set_instanceof_cache_function(Smi::FromInt(0));
   set_instanceof_cache_map(Smi::FromInt(0));
   set_instanceof_cache_answer(Smi::FromInt(0));
 
@@ skipping 1334 matching lines @@
   }
   JSObject* global = JSObject::cast(obj);
   InitializeJSObjectFromMap(global, dictionary, map);
 
   // Create a new map for the global object.
   { MaybeObject* maybe_obj = map->CopyDropDescriptors();
     if (!maybe_obj->ToObject(&obj)) return maybe_obj;
   }
   Map* new_map = Map::cast(obj);
 
-  // Setup the global object as a normalized object.
+  // Set up the global object as a normalized object.
   global->set_map(new_map);
   global->map()->clear_instance_descriptors();
   global->set_properties(dictionary);
 
   // Make sure result is a global object with properties in dictionary.
   ASSERT(global->IsGlobalObject());
   ASSERT(!global->HasFastProperties());
   return global;
 }
 
@@ skipping 912 matching lines @@
   ASSERT((contexts_disposed_ == 0) || !incremental_marking()->IsStopped());
   if (uncommit) UncommitFromSpace();
 
   return finished;
 }
 
 
 #ifdef DEBUG
 
 void Heap::Print() {
-  if (!HasBeenSetup()) return;
+  if (!HasBeenSetUp()) return;
   isolate()->PrintStack();
   AllSpaces spaces;
   for (Space* space = spaces.next(); space != NULL; space = spaces.next())
     space->Print();
 }
 
 
 void Heap::ReportCodeStatistics(const char* title) {
   PrintF(">>>>>> Code Stats (%s) >>>>>>\n", title);
   PagedSpace::ResetCodeStatistics();
@@ skipping 44 matching lines @@
 
 #endif  // DEBUG
 
 bool Heap::Contains(HeapObject* value) {
   return Contains(value->address());
 }
 
 
 bool Heap::Contains(Address addr) {
   if (OS::IsOutsideAllocatedSpace(addr)) return false;
-  return HasBeenSetup() &&
+  return HasBeenSetUp() &&
     (new_space_.ToSpaceContains(addr) ||
      old_pointer_space_->Contains(addr) ||
      old_data_space_->Contains(addr) ||
      code_space_->Contains(addr) ||
      map_space_->Contains(addr) ||
      cell_space_->Contains(addr) ||
      lo_space_->SlowContains(addr));
 }
 
 
 bool Heap::InSpace(HeapObject* value, AllocationSpace space) {
   return InSpace(value->address(), space);
 }
 
 
 bool Heap::InSpace(Address addr, AllocationSpace space) {
   if (OS::IsOutsideAllocatedSpace(addr)) return false;
-  if (!HasBeenSetup()) return false;
+  if (!HasBeenSetUp()) return false;
 
   switch (space) {
     case NEW_SPACE:
       return new_space_.ToSpaceContains(addr);
     case OLD_POINTER_SPACE:
       return old_pointer_space_->Contains(addr);
     case OLD_DATA_SPACE:
       return old_data_space_->Contains(addr);
     case CODE_SPACE:
       return code_space_->Contains(addr);
     case MAP_SPACE:
       return map_space_->Contains(addr);
     case CELL_SPACE:
       return cell_space_->Contains(addr);
     case LO_SPACE:
       return lo_space_->SlowContains(addr);
   }
 
   return false;
 }
 
 
 #ifdef DEBUG
 void Heap::Verify() {
-  ASSERT(HasBeenSetup());
+  ASSERT(HasBeenSetUp());
 
   store_buffer()->Verify();
 
   VerifyPointersVisitor visitor;
   IterateRoots(&visitor, VISIT_ONLY_STRONG);
 
   new_space_.Verify();
 
   old_pointer_space_->Verify(&visitor);
   map_space_->Verify(&visitor);
@@ skipping 406 matching lines @@
   // checking of the sync flag in the snapshot would fail.
 }
 
 
 // TODO(1236194): Since the heap size is configurable on the command line
 // and through the API, we should gracefully handle the case that the heap
 // size is not big enough to fit all the initial objects.
 bool Heap::ConfigureHeap(int max_semispace_size,
                          intptr_t max_old_gen_size,
                          intptr_t max_executable_size) {
-  if (HasBeenSetup()) return false;
+  if (HasBeenSetUp()) return false;
 
   if (max_semispace_size > 0) {
     if (max_semispace_size < Page::kPageSize) {
       max_semispace_size = Page::kPageSize;
       if (FLAG_trace_gc) {
         PrintF("Max semispace size cannot be less than %dkbytes\n",
                Page::kPageSize >> 10);
       }
     }
     max_semispace_size_ = max_semispace_size;
@@ skipping 268 matching lines @@
   Object* search_target_;
   bool found_target_;
   List<Object*> object_stack_;
   Heap* heap_;
 
   friend class Heap;
 };
 
 #endif
 
-bool Heap::Setup(bool create_heap_objects) {
+bool Heap::SetUp(bool create_heap_objects) {
 #ifdef DEBUG
   allocation_timeout_ = FLAG_gc_interval;
   debug_utils_ = new HeapDebugUtils(this);
 #endif
 
   // Initialize heap spaces and initial maps and objects. Whenever something
   // goes wrong, just return false. The caller should check the results and
   // call Heap::TearDown() to release allocated memory.
   //
   // If the heap is not yet configured (eg, through the API), configure it.
   // Configuration is based on the flags new-space-size (really the semispace
   // size) and old-space-size if set or the initial values of semispace_size_
   // and old_generation_size_ otherwise.
   if (!configured_) {
     if (!ConfigureHeapDefault()) return false;
   }
 
   gc_initializer_mutex->Lock();
   static bool initialized_gc = false;
   if (!initialized_gc) {
       initialized_gc = true;
       InitializeScavengingVisitorsTables();
       NewSpaceScavenger::Initialize();
       MarkCompactCollector::Initialize();
   }
   gc_initializer_mutex->Unlock();
 
   MarkMapPointersAsEncoded(false);
 
-  // Setup memory allocator.
-  if (!isolate_->memory_allocator()->Setup(MaxReserved(), MaxExecutableSize()))
+  // Set up memory allocator.
+  if (!isolate_->memory_allocator()->SetUp(MaxReserved(), MaxExecutableSize()))
       return false;
 
-  // Setup new space.
-  if (!new_space_.Setup(reserved_semispace_size_, max_semispace_size_)) {
+  // Set up new space.
+  if (!new_space_.SetUp(reserved_semispace_size_, max_semispace_size_)) {
     return false;
   }
 
   // Initialize old pointer space.
   old_pointer_space_ =
       new OldSpace(this,
                    max_old_generation_size_,
                    OLD_POINTER_SPACE,
                    NOT_EXECUTABLE);
   if (old_pointer_space_ == NULL) return false;
-  if (!old_pointer_space_->Setup()) return false;
+  if (!old_pointer_space_->SetUp()) return false;
 
   // Initialize old data space.
   old_data_space_ =
       new OldSpace(this,
                    max_old_generation_size_,
                    OLD_DATA_SPACE,
                    NOT_EXECUTABLE);
   if (old_data_space_ == NULL) return false;
-  if (!old_data_space_->Setup()) return false;
+  if (!old_data_space_->SetUp()) return false;
 
   // Initialize the code space, set its maximum capacity to the old
   // generation size. It needs executable memory.
   // On 64-bit platform(s), we put all code objects in a 2 GB range of
   // virtual address space, so that they can call each other with near calls.
   if (code_range_size_ > 0) {
-    if (!isolate_->code_range()->Setup(code_range_size_)) {
+    if (!isolate_->code_range()->SetUp(code_range_size_)) {
       return false;
     }
   }
 
   code_space_ =
       new OldSpace(this, max_old_generation_size_, CODE_SPACE, EXECUTABLE);
   if (code_space_ == NULL) return false;
-  if (!code_space_->Setup()) return false;
+  if (!code_space_->SetUp()) return false;
 
   // Initialize map space.
   map_space_ = new MapSpace(this,
                             max_old_generation_size_,
                             FLAG_max_map_space_pages,
                             MAP_SPACE);
   if (map_space_ == NULL) return false;
-  if (!map_space_->Setup()) return false;
+  if (!map_space_->SetUp()) return false;
 
   // Initialize global property cell space.
   cell_space_ = new CellSpace(this, max_old_generation_size_, CELL_SPACE);
   if (cell_space_ == NULL) return false;
-  if (!cell_space_->Setup()) return false;
+  if (!cell_space_->SetUp()) return false;
 
   // The large object code space may contain code or data.  We set the memory
   // to be non-executable here for safety, but this means we need to enable it
   // explicitly when allocating large code objects.
   lo_space_ = new LargeObjectSpace(this, max_old_generation_size_, LO_SPACE);
   if (lo_space_ == NULL) return false;
-  if (!lo_space_->Setup()) return false;
+  if (!lo_space_->SetUp()) return false;
 
-  // Setup the seed that is used to randomize the string hash function.
-  ASSERT(string_hash_seed() == 0);
-  if (FLAG_randomize_string_hashes) {
-    if (FLAG_string_hash_seed == 0) {
-      set_string_hash_seed(
+  // Set up the seed that is used to randomize the string hash function.
+  ASSERT(hash_seed() == 0);
+  if (FLAG_randomize_hashes) {
+    if (FLAG_hash_seed == 0) {
+      set_hash_seed(
           Smi::FromInt(V8::RandomPrivate(isolate()) & 0x3fffffff));
     } else {
-      set_string_hash_seed(Smi::FromInt(FLAG_string_hash_seed));
+      set_hash_seed(Smi::FromInt(FLAG_hash_seed));
     }
   }
 
   if (create_heap_objects) {
     // Create initial maps.
     if (!CreateInitialMaps()) return false;
     if (!CreateApiObjects()) return false;
 
     // Create initial objects
     if (!CreateInitialObjects()) return false;
 
     global_contexts_list_ = undefined_value();
   }
 
   LOG(isolate_, IntPtrTEvent("heap-capacity", Capacity()));
   LOG(isolate_, IntPtrTEvent("heap-available", Available()));
 
-  store_buffer()->Setup();
+  store_buffer()->SetUp();
 
   return true;
 }
 
 
 void Heap::SetStackLimits() {
   ASSERT(isolate_ != NULL);
   ASSERT(isolate_ == isolate());
   // On 64 bit machines, pointers are generally out of range of Smis.  We write
   // something that looks like an out of range Smi to the GC.
@@ skipping 937 matching lines @@
   isolate_->heap()->store_buffer()->Compact();
   isolate_->heap()->store_buffer()->Filter(MemoryChunk::ABOUT_TO_BE_FREED);
   for (chunk = chunks_queued_for_free_; chunk != NULL; chunk = next) {
     next = chunk->next_chunk();
     isolate_->memory_allocator()->Free(chunk);
   }
   chunks_queued_for_free_ = NULL;
 }
 
 } }  // namespace v8::internal