Implement committed physical memory stats for Linux.

src/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 193 matching lines @@
 
   return new_space_.CommittedMemory() +
       old_pointer_space_->CommittedMemory() +
       old_data_space_->CommittedMemory() +
       code_space_->CommittedMemory() +
       map_space_->CommittedMemory() +
       cell_space_->CommittedMemory() +
       lo_space_->Size();
 }
 
+
+size_t Heap::CommittedPhysicalMemory() {
+  if (!HasBeenSetUp()) return 0;
+
+  return new_space_.CommittedPhysicalMemory() +
+      old_pointer_space_->CommittedPhysicalMemory() +
+      old_data_space_->CommittedPhysicalMemory() +
+      code_space_->CommittedPhysicalMemory() +
+      map_space_->CommittedPhysicalMemory() +
+      cell_space_->CommittedPhysicalMemory() +
+      lo_space_->CommittedPhysicalMemory();
+}
+
+
 intptr_t Heap::CommittedMemoryExecutable() {
   if (!HasBeenSetUp()) return 0;
 
   return isolate()->memory_allocator()->SizeExecutable();
 }
 
 
 intptr_t Heap::Available() {
   if (!HasBeenSetUp()) return 0;
 
@@ skipping 7096 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   memcpy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   memcpy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 
 } }  // namespace v8::internal