jdk8-mips64-public/hotspot: src/share/vm/memory/genOopClosures.inline.hpp@d903bf750e9f (annotated)

src/share/vm/memory/genOopClosures.inline.hpp@d903bf750e9f (annotated)

src/share/vm/memory/genOopClosures.inline.hpp

Wed, 18 Jan 2012 09:50:16 -0800

author: johnc
date: Wed, 18 Jan 2012 09:50:16 -0800
changeset 3538: d903bf750e9f
parent 2314: f95d63e2154a
child 4037: da91efe96a93
permissions: -rw-r--r--

7129514: time warp warnings after 7117303
Summary: Replace calls to os::javaTimeMillis() that are used to update the milliseconds since the last GC to an equivalent that uses a monotonically non-decreasing time source.
Reviewed-by: ysr, jmasa

 /*
  * Copyright (c) 2001, 2010, 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_MEMORY_GENOOPCLOSURES_INLINE_HPP
 #define SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP
 #include "memory/cardTableRS.hpp"
 #include "memory/defNewGeneration.hpp"
 #include "memory/genCollectedHeap.hpp"
 #include "memory/genOopClosures.hpp"
 #include "memory/genRemSet.hpp"
 #include "memory/generation.hpp"
 #include "memory/sharedHeap.hpp"
 #include "memory/space.hpp"
 inline OopsInGenClosure::OopsInGenClosure(Generation* gen) :
   OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) {
   set_generation(gen);
 }
 inline void OopsInGenClosure::set_generation(Generation* gen) {
   _gen = gen;
   _gen_boundary = _gen->reserved().start();
   // Barrier set for the heap, must be set after heap is initialized
   if (_rs == NULL) {
     GenRemSet* rs = SharedHeap::heap()->rem_set();
     assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind");
     _rs = (CardTableRS*)rs;
   }
 }
 template <class T> inline void OopsInGenClosure::do_barrier(T* p) {
   assert(generation()->is_in_reserved(p), "expected ref in generation");
   T heap_oop = oopDesc::load_heap_oop(p);
   assert(!oopDesc::is_null(heap_oop), "expected non-null oop");
   oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
   // If p points to a younger generation, mark the card.
   if ((HeapWord*)obj < _gen_boundary) {
     _rs->inline_write_ref_field_gc(p, obj);
   }
 }
 template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) {
   assert(generation()->is_in_reserved(p), "expected ref in generation");
   T heap_oop = oopDesc::load_heap_oop(p);
   assert(!oopDesc::is_null(heap_oop), "expected non-null oop");
   oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
   // If p points to a younger generation, mark the card.
   if ((HeapWord*)obj < gen_boundary()) {
     rs()->write_ref_field_gc_par(p, obj);
   }
 }
 // NOTE! Any changes made here should also be made
 // in FastScanClosure::do_oop_work()
 template <class T> inline void ScanClosure::do_oop_work(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   // Should we copy the obj?
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     if ((HeapWord*)obj < _boundary) {
       assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");
       oop new_obj = obj->is_forwarded() ? obj->forwardee()
                                         : _g->copy_to_survivor_space(obj);
       oopDesc::encode_store_heap_oop_not_null(p, new_obj);
     }
     if (_gc_barrier) {
       // Now call parent closure
       do_barrier(p);
     }
   }
 }
 inline void ScanClosure::do_oop_nv(oop* p)       { ScanClosure::do_oop_work(p); }
 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); }
 // NOTE! Any changes made here should also be made
 // in ScanClosure::do_oop_work()
 template <class T> inline void FastScanClosure::do_oop_work(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   // Should we copy the obj?
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     if ((HeapWord*)obj < _boundary) {
       assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");
       oop new_obj = obj->is_forwarded() ? obj->forwardee()
                                         : _g->copy_to_survivor_space(obj);
       oopDesc::encode_store_heap_oop_not_null(p, new_obj);
       if (_gc_barrier) {
         // Now call parent closure
         do_barrier(p);
       }
     }
   }
 }
 inline void FastScanClosure::do_oop_nv(oop* p)       { FastScanClosure::do_oop_work(p); }
 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); }
 // Note similarity to ScanClosure; the difference is that
 // the barrier set is taken care of outside this closure.
 template <class T> inline void ScanWeakRefClosure::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)) {
     oop new_obj = obj->is_forwarded() ? obj->forwardee()
                                       : _g->copy_to_survivor_space(obj);
     oopDesc::encode_store_heap_oop_not_null(p, new_obj);
   }
 }
 inline void ScanWeakRefClosure::do_oop_nv(oop* p)       { ScanWeakRefClosure::do_oop_work(p); }
 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); }
 #endif // SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/memory/genOopClosures.inline.hpp@d903bf750e9f (annotated)

src/share/vm/memory/genOopClosures.inline.hpp