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

courgette/memory_allocator.cc

Index: courgette/memory_allocator.cc
diff --git a/courgette/memory_allocator.cc b/courgette/memory_allocator.cc
index e83a293ae6e474d40b09e3abf03dded377ae89e2..0325b28233b78d94ba86802e6e4193bb68412c3b 100644
--- a/courgette/memory_allocator.cc
+++ b/courgette/memory_allocator.cc
@@ -7,7 +7,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <map>
+#include <algorithm>
 
 #include "base/files/file_util.h"
 #include "base/strings/stringprintf.h"
@@ -83,10 +83,15 @@ void* FileMapping::view() const {
 
 // TempMapping
 
+long long TempMapping::alloc_cur = 0;
+long long TempMapping::alloc_sum = 0;
+long long TempMapping::alloc_max = 0;
+
 TempMapping::TempMapping() {
 }
 
 TempMapping::~TempMapping() {
+  alloc_cur -= size_;
 }
 
 bool TempMapping::Initialize(size_t size) {
@@ -107,6 +112,11 @@ bool TempMapping::Initialize(size_t size) {
   TempMapping** write = reinterpret_cast<TempMapping**>(mapping_.view());
   write[0] = this;
 
+  size_ = size;
+  alloc_cur += size_;
+  alloc_sum += size_;
+  alloc_max = std::max(alloc_max, alloc_cur);
+
   return true;
 }