[heap] Internalize kExternalAllocationLimit

src/heap/heap.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_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 803 matching lines @@
   void RememberUnmappedPage(Address page, bool compacted);
 
   // Global inline caching age: it is incremented on some GCs after context
   // disposal. We use it to flush inline caches.
   int global_ic_age() { return global_ic_age_; }
 
   void AgeInlineCaches() {
     global_ic_age_ = (global_ic_age_ + 1) & SharedFunctionInfo::ICAgeBits::kMax;
   }
 
-  int64_t amount_of_external_allocated_memory() {
-    return amount_of_external_allocated_memory_;
+  int64_t external_memory() { return external_memory_; }
+  void update_external_memory(int64_t delta) { external_memory_ += delta; }
+
+  void update_external_memory_concurrently_freed(intptr_t freed) {
+    external_memory_concurrently_freed_.Increment(freed);
   }
 
-  void update_amount_of_external_allocated_memory(int64_t delta) {
-    amount_of_external_allocated_memory_ += delta;
-  }
-
-  void update_amount_of_external_allocated_freed_memory(intptr_t freed) {
-    amount_of_external_allocated_memory_freed_.Increment(freed);
-  }
-
-  void account_amount_of_external_allocated_freed_memory() {
-    amount_of_external_allocated_memory_ -=
-        amount_of_external_allocated_memory_freed_.Value();
-    amount_of_external_allocated_memory_freed_.SetValue(0);
+  void account_external_memory_concurrently_freed() {
+    external_memory_ -= external_memory_concurrently_freed_.Value();
+    external_memory_concurrently_freed_.SetValue(0);
   }
 
   void DeoptMarkedAllocationSites();
 
   bool DeoptMaybeTenuredAllocationSites() {
     return new_space_.IsAtMaximumCapacity() && maximum_size_scavenges_ == 0;
   }
 
   void AddWeakObjectToCodeDependency(Handle<HeapObject> obj,
                                      Handle<DependentCode> dep);
@@ skipping 1140 matching lines @@
       AllocateCode(int object_size, bool immovable);
 
   MUST_USE_RESULT AllocationResult InternalizeStringWithKey(HashTableKey* key);
 
   MUST_USE_RESULT AllocationResult InternalizeString(String* str);
 
   // ===========================================================================
 
   void set_force_oom(bool value) { force_oom_ = value; }
 
-  // The amount of external memory registered through the API kept alive
-  // by global handles
-  int64_t amount_of_external_allocated_memory_;
+  // The amount of external memory registered through the API.
+  int64_t external_memory_;
 
-  // Caches the amount of external memory registered at the last global gc.
-  int64_t amount_of_external_allocated_memory_at_last_global_gc_;
+  // The limit when to trigger memory pressure from the API.
+  int64_t external_memory_limit_;
 
-  base::AtomicNumber<intptr_t> amount_of_external_allocated_memory_freed_;
+  // Caches the amount of external memory registered at the last MC.
+  int64_t external_memory_at_last_mark_compact_;
+
+  // The amount of memory that has been freed concurrently.
+  base::AtomicNumber<intptr_t> external_memory_concurrently_freed_;
 
   // This can be calculated directly from a pointer to the heap; however, it is
   // more expedient to get at the isolate directly from within Heap methods.
   Isolate* isolate_;
 
   Object* roots_[kRootListLength];
 
   size_t code_range_size_;
   int max_semi_space_size_;
   int initial_semispace_size_;
@@ skipping 651 matching lines @@
   friend class LargeObjectSpace;
   friend class NewSpace;
   friend class PagedSpace;
   DISALLOW_COPY_AND_ASSIGN(AllocationObserver);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_