8035870: Check jdk/src/windows/native/java/io/WinNTFileSystem_md.c for JNI pending exceptions Summary: NI return checks, NULL return checks for malloc added Reviewed-by: alanb, chegar

8036607: JNI exception pending in jdk/src/windows/native/java/net/DualStackPlainDatagramSocketImpl.c Summary: check for JNI pending exception and NULL returns from JNI calls in DualStackPlainDatagramSocketImpl.c Reviewed-by: alanb

8025293: JNI exception pending checks in java.net Summary: enhance the return check for JNI native calls, check for NULL and pending exceptions Reviewed-by: alanb, chegar

8035340: (prefs) Check jdk/src/windows/native/java/util/WindowsPreference.c for JNI pending exceptions Summary: Check for JNI pending exceptions. Add null checks after malloc calls Reviewed-by: alanb, chegar