hg: jdk/sandbox: 8193042: NativeLookup::lookup_critical_entry() should only load shared library once

[chris.hegarty at oracle.com]

Changeset: 3d44a84147cc
Author:    thartmann
Date:      2019-07-31 08:05 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/3d44a84147cc

8193042: NativeLookup::lookup_critical_entry() should only load shared library once
Summary: Avoids repeated loads/unloads of the same shared library.
Reviewed-by: dholmes, dlong, thartmann
Contributed-by: Christian Hagedorn <christian.hagedorn at oracle.com>

! src/hotspot/share/prims/nativeLookup.cpp
! src/hotspot/share/prims/nativeLookup.hpp