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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package sun.jvm.hotspot.gc.z;
import sun.jvm.hotspot.debugger.Address;
import sun.jvm.hotspot.runtime.VM;
class ZBarrier {
private static boolean is_weak_good_or_null_fast_path(Address addr) {
return ZAddress.is_weak_good_or_null(addr);
}
private static Address weak_load_barrier_on_oop_slow_path(Address addr) {
return ZAddress.is_weak_good(addr) ? ZAddress.good(addr) : relocate_or_remap(addr);
}
private static boolean during_relocate() {
return ZGlobals.ZGlobalPhase() == ZGlobals.ZPhaseRelocate;
}
private static Address relocate(Address addr) {
ZHeap heap = zheap();
if (heap.is_relocating(addr)) {
// Forward
return heap.relocate_object(addr);
}
// Remap
return ZAddress.good(addr);
}
private static ZHeap zheap() {
ZCollectedHeap zCollectedHeap = (ZCollectedHeap)VM.getVM().getUniverse().heap();
return zCollectedHeap.heap();
}
private static Address remap(Address addr) {
ZHeap heap = zheap();
if (heap.is_relocating(addr)) {
// Forward
return heap.forward_object(addr);
}
// Remap
return ZAddress.good(addr);
}
private static Address relocate_or_remap(Address addr) {
return during_relocate() ? relocate(addr) : remap(addr);
}
static Address weak_barrier(Address o) {
// Fast path
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