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/parallel/parallelScavengeHeap.inline.hpp"

    27 #include "gc/parallel/psMarkSweep.hpp"

    28 #include "gc/parallel/psScavenge.hpp"

    29 #include "gc/parallel/vmPSOperations.hpp"

    30 #include "gc/shared/gcLocker.inline.hpp"

    31 #include "utilities/dtrace.hpp"

    32 

    33 // The following methods are used by the parallel scavenge collector

    34 VM_ParallelGCFailedAllocation::VM_ParallelGCFailedAllocation(size_t word_size,

    35                                                              uint gc_count) :

    36     VM_CollectForAllocation(word_size, gc_count, GCCause::_allocation_failure) {

    37   assert(word_size != 0, "An allocation should always be requested with this operation.");

    38 }

    39 

    40 void VM_ParallelGCFailedAllocation::doit() {

    41   SvcGCMarker sgcm(SvcGCMarker::MINOR);

    42 

    43   ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();

    44 

    45   GCCauseSetter gccs(heap, _gc_cause);

    46   _result = heap->failed_mem_allocate(_word_size);

    47 

    48   if (_result == NULL && GC_locker::is_active_and_needs_gc()) {

    49     set_gc_locked();

    50   }

    51 }

    52 

    53 // Only used for System.gc() calls

    54 VM_ParallelGCSystemGC::VM_ParallelGCSystemGC(uint gc_count,

    55                                              uint full_gc_count,

    56                                              GCCause::Cause gc_cause) :

    57   VM_GC_Operation(gc_count, gc_cause, full_gc_count, true /* full */)

    58 {

    59 }

    60 

    61 void VM_ParallelGCSystemGC::doit() {

    62   SvcGCMarker sgcm(SvcGCMarker::FULL);

    63 

    64   ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();

    65 

    66   GCCauseSetter gccs(heap, _gc_cause);

    67   if (_gc_cause == GCCause::_gc_locker || _gc_cause == GCCause::_wb_young_gc

    68       DEBUG_ONLY(|| _gc_cause == GCCause::_scavenge_alot)) {

    69     // If (and only if) the scavenge fails, this will invoke a full gc.

    70     heap->invoke_scavenge();

    71   } else {

    72     heap->do_full_collection(false);

    73   }

    74 }