1 /*
   2  * Copyright (c) 2015, 2017, 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 "utilities/debug.hpp"
  32 #include "utilities/globalDefinitions.hpp"
  33 
  34 static void z_verify_loaded_object(const oop* p, const oop obj) {
  35   guarantee(ZOop::is_good_or_null(obj),
  36             "Bad oop " PTR_FORMAT " found at " PTR_FORMAT ", expected " PTR_FORMAT,
  37             p2i(obj), p2i(p), p2i(ZOop::good(obj)));
  38   guarantee(oopDesc::is_oop_or_null(obj),
  39             "Bad object " PTR_FORMAT " found at " PTR_FORMAT,
  40             p2i(obj), p2i(p));
  41 }
  42 
  43 ZVerifyHeapOopClosure::ZVerifyHeapOopClosure(oop base)
  44     : _base(base) {}
  45 
  46 void ZVerifyHeapOopClosure::do_oop(oop* p) {
  47   guarantee(ZHeap::heap()->is_in((uintptr_t)p), "oop* " PTR_FORMAT " not in heap", p2i(p));
  48 
  49   const oop obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(_base, _base->field_offset(p));
  50   z_verify_loaded_object(p, obj);
  51 }
  52 
  53 void ZVerifyHeapOopClosure::do_oop(narrowOop* p) {
  54   ShouldNotReachHere();
  55 }
  56 
  57 void ZVerifyRootOopClosure::do_oop(oop* p) {
  58   guarantee(!ZHeap::heap()->is_in((uintptr_t)p), "oop* " PTR_FORMAT " in heap", p2i(p));
  59 
  60   const oop obj = RootAccess<>::oop_load(p);
  61   z_verify_loaded_object(p, obj);
  62 }
  63 
  64 void ZVerifyRootOopClosure::do_oop(narrowOop* p) {
  65   ShouldNotReachHere();
  66 }
  67 
  68 void ZVerifyObjectClosure::do_object(oop o) {
  69   ZVerifyHeapOopClosure cl(o);
  70   o->oop_iterate(&cl);
  71 }
  72 
  73 // Generate Z specialized oop_oop_iterate functions.
  74 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_Z(ALL_KLASS_OOP_OOP_ITERATE_DEFN)