1 /*
   2  * Copyright (c) 2007, 2015, 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 
  25 #include "precompiled.hpp"
  26 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
  27 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
  28 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
  29 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
  30 #include "gc_implementation/parallelScavenge/vmPSOperations.hpp"
  31 #include "memory/gcLocker.inline.hpp"
  32 #include "utilities/dtrace.hpp"
  33 
  34 // The following methods are used by the parallel scavenge collector
  35 VM_ParallelGCFailedAllocation::VM_ParallelGCFailedAllocation(size_t word_size,
  36                                                              uint gc_count) :
  37     VM_CollectForAllocation(word_size, gc_count, GCCause::_allocation_failure) {
  38   assert(word_size != 0, "An allocation should always be requested with this operation.");
  39 }
  40 
  41 void VM_ParallelGCFailedAllocation::doit() {
  42   SvcGCMarker sgcm(SvcGCMarker::MINOR);
  43 
  44   ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
  45 
  46   GCCauseSetter gccs(heap, _gc_cause);
  47   _result = heap->failed_mem_allocate(_word_size);
  48 
  49   if (_result == NULL && GC_locker::is_active_and_needs_gc()) {
  50     set_gc_locked();
  51   }
  52 }
  53 
  54 // Only used for System.gc() calls
  55 VM_ParallelGCSystemGC::VM_ParallelGCSystemGC(uint gc_count,
  56                                              uint full_gc_count,
  57                                              GCCause::Cause gc_cause) :
  58   VM_GC_Operation(gc_count, gc_cause, full_gc_count, true /* full */)
  59 {
  60 }
  61 
  62 void VM_ParallelGCSystemGC::doit() {
  63   SvcGCMarker sgcm(SvcGCMarker::FULL);
  64 
  65   ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
  66 
  67   GCCauseSetter gccs(heap, _gc_cause);
  68   if (_gc_cause == GCCause::_gc_locker || _gc_cause == GCCause::_wb_young_gc
  69       DEBUG_ONLY(|| _gc_cause == GCCause::_scavenge_alot)) {
  70     // If (and only if) the scavenge fails, this will invoke a full gc.
  71     heap->invoke_scavenge();
  72   } else {
  73     heap->do_full_collection(false);
  74   }
  75 }