src/share/vm/runtime/os.hpp

@@ -780,10 +780,13 @@
   // Causes the VM to wait until an external stimulus has been applied
   // (for Unix, that stimulus is a signal, for Windows, an external
   // ResumeThread call)
   static void pause();
 
+  // Deallocate in-RAM pages without unmapping them.
+  static void deallocate_pages(void* addr, size_t size);
+
  protected:
   static long _rand_seed;                   // seed for random number generator
   static int _processor_count;              // number of processors
 
   static char* format_boot_path(const char* format_string,