[Courgette Experiment] Track and print TempMapping total and peak allocation to measure Courgette d…

courgette/memory_allocator.h

Index: courgette/memory_allocator.h
diff --git a/courgette/memory_allocator.h b/courgette/memory_allocator.h
index e332a32cee170852600bd4c39f17415d04022171..b7fa70b89708b9b37b3351b23feaa861496deebc 100644
--- a/courgette/memory_allocator.h
+++ b/courgette/memory_allocator.h
@@ -117,6 +117,10 @@ class FileMapping {
 // you can get a pointer to the TempMapping instance that owns that memory.
 class TempMapping {
  public:
+  static long long alloc_cur;
+  static long long alloc_sum;
+  static long long alloc_max;
+
   TempMapping();
   ~TempMapping();
 
@@ -138,6 +142,8 @@ class TempMapping {
  protected:
   base::File file_;
   FileMapping mapping_;
+
+  size_t size_ = 0;
 };
 
 // A memory allocator class that allocates memory either from the heap or via a