src/hotspot/share/runtime/os.hpp

*** 269,278 ****
--- 269,282 ----
    static bool uses_stack_guard_pages();
    static bool must_commit_stack_guard_pages();
    static void map_stack_shadow_pages(address sp);
    static bool stack_shadow_pages_available(Thread *thread, const methodHandle& method, address sp);
  
+   // Find committed memory region within specified range (start, start + size),
+   // return true if found any
+   static bool committed_in_range(address start, size_t size, address& committed_start, size_t& committed_size);
+ 
    // OS interface to Virtual Memory
  
    // Return the default page size.
    static int    vm_page_size();