src/share/vm/runtime/os.hpp

@@ -152,10 +152,11 @@
 
   // Get summary strings for system information in buffer provided
   static void  get_summary_cpu_info(char* buf, size_t buflen);
   static void  get_summary_os_info(char* buf, size_t buflen);
 
+  static int create_tmpfile(const char* dir, size_t size, bool exec);
  public:
   static void init(void);                      // Called before command line parsing
   static void init_before_ergo(void);          // Called after command line parsing
                                                // before VM ergonomics processing.
   static jint init_2(void);                    // Called after command line parsing

@@ -309,10 +310,14 @@
                                size_t alignment_hint = 0);
   static char*  reserve_memory(size_t bytes, char* addr,
                                size_t alignment_hint, MEMFLAGS flags);
   static char*  reserve_memory_aligned(size_t size, size_t alignment);
   static char*  attempt_reserve_memory_at(size_t bytes, char* addr);
+
+  // Map the given address range to a temporary file created at the specified directory.
+  // The address range must already be reserved for guaranteed success. If it not reserved, their could be an error while mapping leading to JVM shutdown
+  static bool   map_memory_to_file(char* base, size_t size, const char* backing_filename);
   static void   split_reserved_memory(char *base, size_t size,
                                       size_t split, bool realloc);
   static bool   commit_memory(char* addr, size_t bytes, bool executable);
   static bool   commit_memory(char* addr, size_t size, size_t alignment_hint,
                               bool executable);