Print malloc-ed memory when running with --trace-gc-object-stats.

src/base/accounting-allocator.h

Index: src/base/accounting-allocator.h
diff --git a/src/base/accounting-allocator.h b/src/base/accounting-allocator.h
index ad2fc988cc89c29d37fc31aa1410a2f5ad277f86..4e1baf18d4d57a37510f98ae4fa10d65a7c9f7ae 100644
--- a/src/base/accounting-allocator.h
+++ b/src/base/accounting-allocator.h
@@ -11,14 +11,14 @@
 namespace v8 {
 namespace base {
 
-class AccountingAllocator final {
+class AccountingAllocator {
  public:
   AccountingAllocator() = default;
-  ~AccountingAllocator() = default;
+  virtual ~AccountingAllocator() = default;

[jochen (gone - plz use gerrit), 2016/09/05 10:00:26]

instead of making this virtual, you could have just moved the class out of base/
and added the tracking stuff to the allocator itself.

Not sure whether the additional checks are more expensive or paying for a
virtual lookup on every call...

 
   // Returns nullptr on failed allocation.
-  void* Allocate(size_t bytes);
-  void Free(void* memory, size_t bytes);
+  virtual void* Allocate(size_t bytes);
+  virtual void Free(void* memory, size_t bytes);
 
   size_t GetCurrentMemoryUsage() const;
   size_t GetMaxMemoryUsage() const;