6719981: Update Hotspot Windows os_win32 for windows XP 64 bit and windows 2008

Reviewed-by: dholmes, kamg

src/os/windows/vm/os_windows.cpp

@@ -1447,6 +1447,10 @@ void os::print_dll_info(outputStream *st) {
    enumerate_modules(pid, _print_module, (void *)st);
 }
 
+// function pointer to Windows API "GetNativeSystemInfo".
+typedef void (WINAPI *GetNativeSystemInfo_func_type)(LPSYSTEM_INFO);
+static GetNativeSystemInfo_func_type _GetNativeSystemInfo;
+
 void os::print_os_info(outputStream* st) {
   st->print("OS:");
 
@@ -1460,15 +1464,46 @@ void os::print_os_info(outputStream* st) {
   }
 
   int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion;
-
   if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
     switch (os_vers) {
     case 3051: st->print(" Windows NT 3.51"); break;
     case 4000: st->print(" Windows NT 4.0"); break;
     case 5000: st->print(" Windows 2000"); break;
     case 5001: st->print(" Windows XP"); break;
-       case 5002: st->print(" Windows Server 2003 family"); break;
-       case 6000: st->print(" Windows Vista"); break;
+    case 5002:
+    case 6000: {
+      // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could
+      // find out whether we are running on 64 bit processor or not.
+      SYSTEM_INFO si;
+      ZeroMemory(&si, sizeof(SYSTEM_INFO));
+      // Check to see if _GetNativeSystemInfo has been initialized.
+      if (_GetNativeSystemInfo == NULL) {
+        HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll"));
+        _GetNativeSystemInfo =
+            CAST_TO_FN_PTR(GetNativeSystemInfo_func_type,
+                           GetProcAddress(hKernel32,
+                                          "GetNativeSystemInfo"));
+        if (_GetNativeSystemInfo == NULL)
+          GetSystemInfo(&si);
+      } else {
+        _GetNativeSystemInfo(&si);
+      }
+      if (os_vers == 5002) {
+        if (osvi.wProductType == VER_NT_WORKSTATION &&
+            si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
+          st->print(" Windows XP x64 Edition");
+        else
+            st->print(" Windows Server 2003 family");
+      } else { // os_vers == 6000
+        if (osvi.wProductType == VER_NT_WORKSTATION)
+            st->print(" Windows Vista");
+        else
+            st->print(" Windows Server 2008");
+        if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
+            st->print(" , 64 bit");
+      }
+      break;
+    }
     default: // future windows, print out its major and minor versions
       st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
     }
@@ -1481,7 +1516,6 @@ void os::print_os_info(outputStream* st) {
       st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
     }
   }
-
   st->print(" Build %d", osvi.dwBuildNumber);
   st->print(" %s", osvi.szCSDVersion);           // service pack
   st->cr();