Implement committed physical memory stats for Linux.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 92d928b328822aaec30f9b2dc421aa2a42050d56..b6f70d0c49a7bad11c556ea44cd0c9c01348c93e 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2766,6 +2766,7 @@ class V8EXPORT HeapStatistics {
   HeapStatistics();
   size_t total_heap_size() { return total_heap_size_; }
   size_t total_heap_size_executable() { return total_heap_size_executable_; }
+  size_t committed_physical_size() { return committed_physical_size_; }

[Michael Starzinger, 2012/09/27 09:46:16]

Can we rename this to "total_physical_size"? This makes more sense in the API
naming scheme, we never use the word "committed" there AFAIK. I am totally fine
with the internal name.

[alph, 2012/09/27 12:51:13]

Done.

   size_t used_heap_size() { return used_heap_size_; }
   size_t heap_size_limit() { return heap_size_limit_; }
 
@@ -2774,11 +2775,15 @@ class V8EXPORT HeapStatistics {
   void set_total_heap_size_executable(size_t size) {
     total_heap_size_executable_ = size;
   }
+  void set_committed_physical_size(size_t size) {
+    committed_physical_size_ = size;
+  }
   void set_used_heap_size(size_t size) { used_heap_size_ = size; }
   void set_heap_size_limit(size_t size) { heap_size_limit_ = size; }
 
   size_t total_heap_size_;
   size_t total_heap_size_executable_;
+  size_t committed_physical_size_;
   size_t used_heap_size_;
   size_t heap_size_limit_;