1 /*
   2  * Copyright (c) 2007, 2018, 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/parallel/parallelScavengeHeap.inline.hpp"
  27 #include "gc/parallel/psScavenge.hpp"
  28 #include "gc/parallel/psVMOperations.hpp"
  29 #include "gc/shared/gcLocker.hpp"
  30 #include "utilities/dtrace.hpp"
  31 
  32 // The following methods are used by the parallel scavenge collector
  33 VM_ParallelGCFailedAllocation::VM_ParallelGCFailedAllocation(size_t word_size,
  34                                                              uint gc_count) :
  35     VM_CollectForAllocation(word_size, gc_count, GCCause::_allocation_failure) {
  36   assert(word_size != 0, "An allocation should always be requested with this operation.");
  37 }
  38 
  39 void VM_ParallelGCFailedAllocation::doit() {
  40   SvcGCMarker sgcm(SvcGCMarker::MINOR);
  41 
  42   ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
  43 
  44   GCCauseSetter gccs(heap, _gc_cause);
  45   _result = heap->failed_mem_allocate(_word_size);
  46 
  47   if (_result == NULL && GCLocker::is_active_and_needs_gc()) {
  48     set_gc_locked();
  49   }
  50 }
  51 
  52 // Only used for System.gc() calls
  53 VM_ParallelGCSystemGC::VM_ParallelGCSystemGC(uint gc_count,
  54                                              uint full_gc_count,
  55                                              GCCause::Cause gc_cause) :
  56   VM_GC_Operation(gc_count, gc_cause, full_gc_count, true /* full */)
  57 {
  58 }
  59 
  60 void VM_ParallelGCSystemGC::doit() {
  61   SvcGCMarker sgcm(SvcGCMarker::FULL);
  62 
  63   ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
  64 
  65   GCCauseSetter gccs(heap, _gc_cause);
  66   if (_gc_cause == GCCause::_gc_locker || _gc_cause == GCCause::_wb_young_gc
  67       DEBUG_ONLY(|| _gc_cause == GCCause::_scavenge_alot)) {
  68     // If (and only if) the scavenge fails, this will invoke a full gc.
  69     heap->invoke_scavenge();
  70   } else {
  71     heap->do_full_collection(false);
  72   }
  73 }