1 /*
   2  * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include "precompiled.hpp"
  25 #include "gc/z/zHeap.hpp"
  26 #include "gc/z/zOopClosures.inline.hpp"
  27 #include "gc/z/zOop.inline.hpp"
  28 #include "memory/iterator.inline.hpp"
  29 #include "oops/access.inline.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/safepoint.hpp"
  32 #include "utilities/debug.hpp"
  33 #include "utilities/globalDefinitions.hpp"
  34 
  35 void ZVerifyOopClosure::do_oop(oop* p) {
  36   guarantee(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");
  37   guarantee(ZGlobalPhase == ZPhaseMarkCompleted, "Invalid phase");
  38   guarantee(!ZResurrection::is_blocked(), "Invalid phase");
  39 
  40   const oop o = RawAccess<>::oop_load(p);
  41   if (o != NULL) {
  42     const uintptr_t addr = ZOop::to_address(o);
  43     const uintptr_t good_addr = ZAddress::good(addr);
  44     guarantee(ZAddress::is_good(addr) || ZAddress::is_finalizable_good(addr),
  45               "Bad oop " PTR_FORMAT " found at " PTR_FORMAT ", expected " PTR_FORMAT,
  46               addr, p2i(p), good_addr);
  47     guarantee(oopDesc::is_oop(ZOop::from_address(good_addr)),
  48               "Bad object " PTR_FORMAT " found at " PTR_FORMAT,
  49               addr, p2i(p));
  50   }
  51 }
  52 
  53 void ZVerifyOopClosure::do_oop(narrowOop* p) {
  54   ShouldNotReachHere();
  55 }
  56 
  57 void ZVerifyObjectClosure::do_object(oop o) {
  58   ZVerifyOopClosure cl;
  59   o->oop_iterate(&cl);
  60 }