jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parNew/parOopClosures.inline.hpp@190899198332 (annotated)

src/share/vm/gc_implementation/parNew/parOopClosures.inline.hpp@190899198332 (annotated)

src/share/vm/gc_implementation/parNew/parOopClosures.inline.hpp

Thu, 26 Sep 2013 10:25:02 -0400

author: hseigel
date: Thu, 26 Sep 2013 10:25:02 -0400
changeset 5784: 190899198332
parent 4037: da91efe96a93
child 6680: 78bbf4d43a14
permissions: -rw-r--r--

7195622: CheckUnhandledOops has limited usefulness now
Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com

 /*
  * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * 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.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_INLINE_HPP
 #include "gc_implementation/parNew/parNewGeneration.hpp"
 #include "gc_implementation/parNew/parOopClosures.hpp"
 #include "memory/cardTableRS.hpp"
 template <class T> inline void ParScanWeakRefClosure::do_oop_work(T* p) {
   assert (!oopDesc::is_null(*p), "null weak reference?");
   oop obj = oopDesc::load_decode_heap_oop_not_null(p);
   // weak references are sometimes scanned twice; must check
   // that to-space doesn't already contain this object
   if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) {
     // we need to ensure that it is copied (see comment in
     // ParScanClosure::do_oop_work).
     Klass* objK = obj->klass();
     markOop m = obj->mark();
     oop new_obj;
     if (m->is_marked()) { // Contains forwarding pointer.
       new_obj = ParNewGeneration::real_forwardee(obj);
     } else {
       size_t obj_sz = obj->size_given_klass(objK);
       new_obj = ((ParNewGeneration*)_g)->copy_to_survivor_space(_par_scan_state,
                                                                 obj, obj_sz, m);
     }
     oopDesc::encode_store_heap_oop_not_null(p, new_obj);
   }
 }
 inline void ParScanWeakRefClosure::do_oop_nv(oop* p)       { ParScanWeakRefClosure::do_oop_work(p); }
 inline void ParScanWeakRefClosure::do_oop_nv(narrowOop* p) { ParScanWeakRefClosure::do_oop_work(p); }
 template <class T> inline void ParScanClosure::par_do_barrier(T* p) {
   assert(generation()->is_in_reserved(p), "expected ref in generation");
   assert(!oopDesc::is_null(*p), "expected non-null object");
   oop obj = oopDesc::load_decode_heap_oop_not_null(p);
   // If p points to a younger generation, mark the card.
   if ((HeapWord*)obj < gen_boundary()) {
     rs()->write_ref_field_gc_par(p, obj);
   }
 }
 template <class T>
 inline void ParScanClosure::do_oop_work(T* p,
                                         bool gc_barrier,
                                         bool root_scan) {
   assert((!Universe::heap()->is_in_reserved(p) ||
           generation()->is_in_reserved(p))
          && (generation()->level() == 0 || gc_barrier),
          "The gen must be right, and we must be doing the barrier "
          "in older generations.");
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     if ((HeapWord*)obj < _boundary) {
 #ifndef PRODUCT
       if (_g->to()->is_in_reserved(obj)) {
         tty->print_cr("Scanning field (" PTR_FORMAT ") twice?", p);
         GenCollectedHeap* gch =  (GenCollectedHeap*)Universe::heap();
         Space* sp = gch->space_containing(p);
         oop obj = oop(sp->block_start(p));
         assert((HeapWord*)obj < (HeapWord*)p, "Error");
         tty->print_cr("Object: " PTR_FORMAT, (void *)obj);
         tty->print_cr("-------");
         obj->print();
         tty->print_cr("-----");
         tty->print_cr("Heap:");
         tty->print_cr("-----");
         gch->print();
         ShouldNotReachHere();
       }
 #endif
       // OK, we need to ensure that it is copied.
       // We read the klass and mark in this order, so that we can reliably
       // get the size of the object: if the mark we read is not a
       // forwarding pointer, then the klass is valid: the klass is only
       // overwritten with an overflow next pointer after the object is
       // forwarded.
       Klass* objK = obj->klass();
       markOop m = obj->mark();
       oop new_obj;
       if (m->is_marked()) { // Contains forwarding pointer.
         new_obj = ParNewGeneration::real_forwardee(obj);
         oopDesc::encode_store_heap_oop_not_null(p, new_obj);
 #ifndef PRODUCT
         if (TraceScavenge) {
           gclog_or_tty->print_cr("{%s %s ( " PTR_FORMAT " ) " PTR_FORMAT " -> " PTR_FORMAT " (%d)}",
              "forwarded ",
              new_obj->klass()->internal_name(), p, (void *)obj, (void *)new_obj, new_obj->size());
         }
 #endif
       } else {
         size_t obj_sz = obj->size_given_klass(objK);
         new_obj = _g->copy_to_survivor_space(_par_scan_state, obj, obj_sz, m);
         oopDesc::encode_store_heap_oop_not_null(p, new_obj);
         if (root_scan) {
           // This may have pushed an object.  If we have a root
           // category with a lot of roots, can't let the queue get too
           // full:
           (void)_par_scan_state->trim_queues(10 * ParallelGCThreads);
         }
       }
       if (is_scanning_a_klass()) {
         do_klass_barrier();
       } else if (gc_barrier) {
         // Now call parent closure
         par_do_barrier(p);
       }
     }
   }
 }
 inline void ParScanWithBarrierClosure::do_oop_nv(oop* p)       { ParScanClosure::do_oop_work(p, true, false); }
 inline void ParScanWithBarrierClosure::do_oop_nv(narrowOop* p) { ParScanClosure::do_oop_work(p, true, false); }
 inline void ParScanWithoutBarrierClosure::do_oop_nv(oop* p)       { ParScanClosure::do_oop_work(p, false, false); }
 inline void ParScanWithoutBarrierClosure::do_oop_nv(narrowOop* p) { ParScanClosure::do_oop_work(p, false, false); }
 #endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/parNew/parOopClosures.inline.hpp@190899198332 (annotated)

src/share/vm/gc_implementation/parNew/parOopClosures.inline.hpp