src/hotspot/os/windows/os_windows.cpp

*** 362,371 ****
--- 362,389 ----
    VirtualQuery(&minfo, &minfo, sizeof(minfo));
    sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase;
    return sz;
  }
  
+ size_t os::pd_committed_stack_size(address bottom, size_t size) {
+   MEMORY_BASIC_INFORMATION minfo;
+   address top = bottom + size;
+   size_t committed_size = 0;
+ 
+   while (committed_size < size) {
+     VirtualQuery(top, &minfo, sizeof(minfo));
+     if ((minfo.State & MEM_COMMIT) != 0) {
+       committed_size += minfo.RegionSize;
+       top -= minfo.RegionSize;
+     } else {
+       break;
+     }
+   }
+ 
+   return MIN2(committed_size, size);
+ }
+ 
  struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
    const struct tm* time_struct_ptr = localtime(clock);
    if (time_struct_ptr != NULL) {
      *res = *time_struct_ptr;
      return res;